SiUS34-907 RXYMQ36·48PVJU R-410A Heat Pump 60Hz
SiUS34-907 R-410A Heat Pump 60Hz 1. Introduction ................................................................................................. v 1.1 Safety Considerations for Repair ................................................................. v 1.2 Safety Considerations for Users...................................................................vi Part 1 General Information .............................................................. 1 1. Model Names of Indoor/Outdoor Units.....................
SiUS34-907 3.4 Pump Down Residual Operation ................................................................ 40 3.5 Restart Standby.......................................................................................... 41 3.6 Stopping Operation .................................................................................... 41 4. Protection Control .....................................................................................42 4.1 4.2 4.3 4.4 High Pressure Protection Control...............
SiUS34-907 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.20 3.21 3.22 3.23 3.24 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 3.35 3.36 3.37 3.38 3.39 3.40 3.41 3.42 3.43 3.44 3.45 3.46 3.47 “C9” Malfunction of Thermistor (R1T) for Suction Air ................................ 127 “CJ” Malfunction of Thermostat Sensor in Remote Controller................... 128 “E1” PCB Defect........................................................................................
SiUS34-907 4.2 “M8” Malfunction of Transmission between Optional Controllers for Centralized Control............................................. 198 4.3 “MA” Improper Combination of Optional Controllers for Centralized Control................................................................................... 200 4.4 “MC” Address Duplication, Improper Setting ............................................. 202 5. Troubleshooting (OP: Unified ON/OFF Controller) .................................204 5.
Safety Considerations SiUS34-907 1. Safety Considerations Read these SAFETY CONSIDERATIONS carefully before performing any repair work. Comply with these safety symbols without fail. • If refrigerant gas is discharged during repair work, do not touch the discharged refrigerant gas. The refrigerant gas may cause frostbite. Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols: • Use only pipes, flare nuts, tools, and other materials designed specifically for R410A refrigerant systems.
SiUS34-907 may generate toxic gases if it comes into contact with flames. • Do not repair the electrical components with wet hands. Working on the equipment with wet hands may cause an electrical shock. • Do not clean the air conditioner or heat pump by splashing water on it. Washing the unit with water may cause an electrical shock. • Turn off the power when cleaning the equipment to prevent internal fans that rotate at high speed from starting suddenly as they can cause injury.
Safety Considerations 1.3 SiUS34-907 PREFACE Thank you for your continued patronage of Daikin products. This is the new service manual for Daikin's Year 2010 VRVIII-S series Heat Pump System. Daikin offers a wide range of models to respond to building and office air conditioning needs. We are confident that customers will be able to find the models that best suit their needs. This service manual contains information regarding the servicing of VRVIII-S series R-410A Heat Pump System.
SiUS34-907 viii Safety Considerations
SiUS34-907 Part 1 General Information 1. Model Names of Indoor/Outdoor Units........................................................2 2. External Appearance...................................................................................3 2.1 Indoor Units .................................................................................................. 3 2.2 Outdoor Units ............................................................................................... 3 3. Capacity Range..................
Model Names of Indoor/Outdoor Units SiUS34-907 1.
SiUS34-907 External Appearance 2. External Appearance 2.
Capacity Range SiUS34-907 3. Capacity Range Outdoor Units Model RXYMQ Capacity Range 3 ton 4 ton Capacity Index No of Indoor Units to be Connected 36P 6 48P 8 18~46.8 24~62.4 Total Capacity Index of Indoor Units to be Connected Indoor Units Capacity Range Capacity Index 4 0.6ton 7.5 0.8ton 9.5 1ton 12 1.5ton 18 2ton 24 2.
SiUS34-907 Part 2 Specifications 1. Specifications ..............................................................................................6 1.1 Outdoor Units ............................................................................................... 6 1.2 Indoor Units ..................................................................................................
Specifications SiUS34-907 1. Specifications 1.1 Outdoor Units Heat Pump 60Hz RXYMQ36PVJU RXYMQ48PVJU 1 Cooling Capacity Model Name Btu / h 36,000 48,000 2 Heating Capacity Btu / h 40,000 54,000 Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) 52-15/16 × 35-7/16 × 12-5/8 (1345 x 900 x 321) 52-15/16 × 35-7/16 × 12-5/8 (1345 x 900 x 321) Casing Color Dimensions: (H×W×D) in.
SiUS34-907 1.2 Specifications Indoor Units Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ12MVJU FXFQ18MVJU FXFQ24MVJU 1 Cooling Capacity Btu/h 12,000 18,000 24,000 2 Heating Capacity Btu/h 13,500 20,000 27,000 Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate in. (mm) 9-1/8 × 33-1/8 × 33-1/8 (232 x 841 x 841) 9-1/8 × 33-1/8 × 33-1/8 (232 x 841 x 841) 9-1/8 × 33-1/8 × 33-1/8 (232 x 841 x 841) 2 × 8 × 17 2 × 8 × 17 2×8×17 ft²(m²) 3.56 (0.09) 3.56 (0.
Specifications SiUS34-907 Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ30MVJU FXFQ36MVJU 1 Cooling Capacity Btu/h 30,000 36,000 2 Heating Capacity Btu/h 34,000 40,000 Galvanized Steel Plate Galvanized Steel Plate 11-3/8 × 33-1/8 × 33-1/8 (289 x 841 x 841) 11-3/8 × 33-1/8 × 33-1/8 (289 x 841 x 841) Casing / Color Dimensions: (H×W×D) in. (mm) Rows × Stages × FPI Coil (Cross Fin Coil) 2 × 12 × 17 2×12×17 5.35 (1.6) 5.35 (1.
SiUS34-907 Specifications 4 Way Ceiling Mounted Cassette Unit (2’×2’) FXZQ07M7VJU FXZQ09M7VJU FXZQ12M7VJU FXZQ18M7VJU 1 Cooling Capacity Model Btu/h 7,500 9,500 12,000 18,000 2 Heating Capacity Btu/h 8,700 11,100 14,000 21,000 Galvanized Steel / Non Painted Galvanized Steel / Non Painted Galvanized Steel / Non Painted Galvanized Steel / Non Painted 10-1/4 (11-1/4) x 22-2/3 x 222/3 (260 (286) x 576 x 576) ( ): includes Electrical Componets Box 10-1/4 (11-1/4) x 22-2/3 x 222/3 (260 (2
Specifications SiUS34-907 Slim Ceiling Mounted Duct Type Model FXDQ07MVJU FXDQ09MVJU FXDQ12MVJU 1 Cooling Capacity Btu/h 7,500 9,500 12,000 2 Heating Capacity Btu/h 8,500 10,500 13,500 Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate in. (mm) 7-7/8 × 27-9/16 × 24-7/16 (200 x 700 x 621) 7-7/8 × 27-9/16 × 24-7/16 (200 x 700 x 621) 7-7/8 × 27-9/16 × 24-7/16 (200 x 700 x 621) 2 × 12× 17 2 × 12× 17 3 × 12× 17 ft²(m²) 1.36 (0.41) 1.36 (0.41) 1.36 (0.
SiUS34-907 Specifications Slim Ceiling Mounted Duct Type Model 1 Cooling Capacity 2 Heating Capacity Casing / Color Dimensions: (H×W×D) Rows × Stages × FPI Coil (Cross Fin Coil) Face Area Model Type Motor Output Fan Airflow Rate (H/L) External Static Pressure 4 Drive FXDQ18MVJU FXDQ24MVJU kw cfm 18,000 20,000 Galvanized Steel Plate 7-7/8 × 35-7/16 × 24-7/16 (200 x 900 x 621) 3 × 12 × 17 1.89 (0.6) — Sirocco Fan 0.
Specifications SiUS34-907 Ceiling Mounted Duct Type FXMQ07PVJU FXMQ09PVJU FXMQ12PVJU 1, 3 Cooling Capacity Model Btu/h 7,500 9,500 12,000 2, 3 Heating Capacity Btu/h 8,500 10,500 13,500 Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate in. (mm) 11-13/16 × 21-5/8 × 27-9/16 (300 x 549 x 700) 11-13/16 × 21-5/8 × 27-9/16 (300 x 549 x 700) 11-13/16 × 21-5/8 × 27-9/16 (300 x 549 x 700) 3×16×15 3×16×15 3×16×15 ft²(m²) 1.05 (0.32) 1.05 (0.32) 1.05 (0.
SiUS34-907 Specifications Ceiling Mounted Duct Type FXMQ18PVJU FXMQ24PVJU FXMQ30PVJU 1, 3 Cooling Capacity Model Btu/h 18,000 24,000 30,000 2, 3 Heating Capacity Btu/h 20,000 27,000 34,000 Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate in. (mm) 11-13/16 × 39-3/8 × 27-9/16 (300 x 1000 x 700) 11-13/16 × 39-3/8 × 27-9/16 (300 x 1000 x 700) 11-13/16 × 39-3/8 × 27-9/16 (300 x 1000 x 700) 3×16×15 3×16×15 3×16×15 ft² (m²) 2.68 (0.81) 2.68 (0.81) 2.68 (0.
Specifications SiUS34-907 Ceiling Mounted Duct Type Model FXMQ36PVJU FXMQ48PVJU 1, 3 Cooling Capacity Btu/h 36,000 48,000 2, 3 Heating Capacity Btu/h 40,000 54,000 Galvanized Steel Plate Galvanized Steel Plate in. (mm) 11-13/16 × 55-1/8 × 27-9/16 (300 x 1400 x 700) 11-13/16 × 55-1/8 × 27-9/16 (300 x 1400 x 700) 3×16×15 3×16×15 ft² (m²) 4.12 (1.3) 4.12 (1.
SiUS34-907 Specifications Ceiling Suspended Type FXHQ12MVJU FXHQ24MVJU FXHQ36MVJU 1 Cooling Capacity Model Btu/h 12,000 24,000 36,000 2 Heating Capacity Btu/h 13,500 27,000 40,000 White(10Y9/0.5) White(10Y9/0.5) White(10Y9/0.5) in. (mm) 7-11/16 × 37-13/16 × 26-3/4 (195 x 960 x 679) 7-11/16 × 55-1/8 × 26-3/4 (195 x 1400 x 679) 7-11/16 × 62-5/8 × 26-3/4 (195 x 1591 x 679) 2×12×15 3×12×15 2×12×15+2×10×15 ft² (m²) 1.96 (0.6) 3.15 (1.0) 3.66 + 2.95 (1.1 + 0.
Specifications SiUS34-907 Wall Mounted Type FXAQ07MVJU FXAQ09MVJU 1 Cooling Capacity Model Btu/h 7,500 9,500 12,000 2 Heating Capacity Btu/h 8,500 10,500 13,500 White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) in. (mm) 11–3/8 × 31–1/4 × 9 (289 x 794 x 229) 11–3/8 × 31–1/4 × 9 (289 x 794 x 229) 11–3/8×31–1/4×9 (289 x 794 x 229) 2×14×17 2×14×17 2×14×17 ft² (m²) 1.73 (0.5) 1.73 (0.5) 1.73 (0.
SiUS34-907 Specifications Wall Mounted Type Model FXAQ18MVJU FXAQ24MVJU 1 Cooling Capacity Btu/h 18,000 24,000 2 Heating Capacity Btu/h 20,000 27,000 White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) in. (mm) 11–3/8 × 41–3/8 × 9 (289 x 1051 x 229) 11–3/8 × 41–3/8 × 9 (289 x 1051 x 229) 2×14×17 2×14×17 ft² (m²) 2.29 (0.7) 2.29 (0.
Specifications SiUS34-907 Floor Standing Type FXLQ12MVJU FXLQ18MVJU FXLQ24MVJU 1 Cooling Capacity Model Btu/h 12,000 18,000 24,000 2 Heating Capacity Btu/h 13,500 20,000 27,000 Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) in. (mm) 23–5/8 × 44–7/8 × 8–3/4 (600 x 1140 x 222) 23–5/8 × 55-7/8 × 8–3/4 (600 x 1419 x 222) 223–5/8 × 55-7/8 × 8–3/4 (600 x 1419 x 222) 3×14×17 3×14×17 3×14×17 ft² (m²) 2.15 (0.7) 3.04 (0.9) 3.04 (0.
SiUS34-907 Specifications Concealed Floor Standing Type FXNQ12MVJU FXNQ18MVJU FXNQ24MVJU 1 Cooling Capacity Model Btu/h 12,000 18,000 24,000 2 Heating Capacity Btu/h 13,500 20,000 27,000 Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate in. (mm) 24 × 42–1/8 × 8–5/8 (610 x 1070 x 219) 24 × 53–1/8 × 8–5/8 (610 x 1349 x 219) 24 × 53–1/8 × 8–5/8 (610 x 1349 x 219) 3×14×17 3×14×17 3×14×17 ft² (m²) 2.15 (0.6) 3.04 (0.9) 3.04 (0.
SiUS34-907 Part 3 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts .......................................................21 1.1 Outdoor Unit ............................................................................................... 21 1.2 Indoor Unit..................................................................................................
SiUS34-907 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts 1.1 Outdoor Unit Item Compressor Fan motor Functional parts Name Type Output Crankcase heater (INV.) Motor Overcurrent relay Electronic expansion Cooling valve (Main) Heating Electronic expansion Cooling valve (Subcooling) Heating Four-way valve Solenoid valve (Hot gas) Solenoid valve (Unload circuit) Inverter Pressure switch (INV.
List of Electrical and Functional Parts 1.2 SiUS34-907 Indoor Unit Model Parts Name Remote Controller Thermistors Others FXFQ 12MVJU FXFQ 18MVJU FXFQ 24MVJU Wired Remote Controller BRC1C71 Wireless Remote Controller BRC7C812 Fan Motor Motors Symbol Capacitor, fan motor FXFQ 30MVJU FXFQ 36MVJU Remark Option 1φ45W 6P M1F 1φ90W 6P Thermal Protector 266±9°F : OFF C1 176±36°F : ON 3.5μF 450VAC 5.
SiUS34-907 List of Electrical and Functional Parts Model Parts Name Remote Controller Motors Symbol FXDQ 07MVJU FXDQ 09MVJU Wired Remote Controller BRC1C71 Wireless Remote Controller BRC4C82 Fan Motor Capacitor, fan motor Thermistor (Suction Air) 1φ62W 4P M1F FXDQ 24MVJU Remark 1φ130W 4P Thermal Protector 266±9°F : OFF C1 181±27°F : ON 4.0μF 450VAC 7.0μF 450VAC R1T ST8601A-1 φ4 L250 20kΩ (77°F) R3T ST8605A-4 φ8 L800 20kΩ (77°F) R2T ST8602A-4 φ6 L800 20kΩ (77°F) Temp.
List of Electrical and Functional Parts SiUS34-907 Model Parts Name Remote Controller Motors Thermistors Others Symbol FXHQ 12MVJU FXHQ 24MVJU Wired Remote Controller BRC1C71 Wireless Controller BRC7E83 Fan Motor M1F Capacitor for Fan Motor C1R FXHQ 36MVJU Remark Option 1φ63W 1φ130W Thermal protector 266±9°F : OFF 3.0μF-450V 176±36°F : ON 9.
SiUS34-907 List of Electrical and Functional Parts Model Parts Name Remote Controller Motors Symbol FXLQ 12MVJU Wired Remote Controller FXLQ 18MVJU Option — Fan Motor M1F Capacitor for Fan Motor C1R 1φ25W 1φ35W Thermal protector 275°F : OFF 0.5μF-450V 248°F : ON 1.5μF-450V Thermistor (Suction Air) R1T ST8601A-6 φ4 L1250 20kΩ (77°F) Thermistors Thermistor (for Heat Exchanger High Temp.
SiUS34-907 Part 4 Refrigerant Circuit 1. Refrigerant Circuit .....................................................................................27 1.1 RXYMQ36 · 48P......................................................................................... 27 2. Functional Parts Layout ............................................................................29 2.1 RXYMQ36 · 48P.........................................................................................
SiUS34-907 Refrigerant Circuit 1. Refrigerant Circuit 1.1 RXYMQ36 · 48P No. in refrigerant Symbol system diagram Name Major Function A M1C Inverter compressor (INV.) Inverter compressor is operated on frequencies between 36Hz and 195Hz by using the inverter. 31 steps D M1F M2F Inverter fan Because the system is of an air heat exchange type, the fan is operated at 8-step rotation speed by using the inverter.
SiUS34-907 N D S1NPH M D G Refrigerant Circuit S T H E P S1PH F O A S1NPL C : 3D065366 28 Refrigerant Circuit
SiUS34-907 Functional Parts Layout 2. Functional Parts Layout 2.
SiUS34-907 Part 5 Function 1. Operation Mode ........................................................................................31 2. Basic Control............................................................................................. 32 2.1 2.2 2.3 2.4 Normal Operation ....................................................................................... 32 Compressor PI Control...............................................................................
SiUS34-907 Operation Mode 1.
Basic Control SiUS34-907 2. Basic Control 2.
SiUS34-907 2.2 Basic Control Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to achieve Te : Low pressure equivalent saturation temperature (°F) target value (TeS).
Basic Control 2.3 SiUS34-907 Electronic Expansion Valve PI Control Main Electronic Expansion Valve EV1 Control Carries out the electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheated degree (SH) at constant during heating operation to make maximum use of the outdoor unit heat exchanger (evaporator).
SiUS34-907 2.4 Basic Control Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using the outdoor unit fan. When the outdoor temperature ≥ 68°F, the compressor will run in Step 7 or higher. When the outdoor temperature ≥ 64°F, it will run in Step 5 or higher. When the outdoor temperature ≥ 54°F, it will run in Step 1 or higher.
Special Control SiUS34-907 3. Special Control 3.1 Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. The inverter is turned ON to charge the capacitor. In addition, to avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four-way valve is also determined.
SiUS34-907 3.2 Special Control Oil Return Operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil flown out from the compressor to the system side. 3.2.1 Oil Return Operation in Cooling Operation [Start conditions] Referring to the set conditions for the following items, start the oil-return operation in cooling.
Special Control SiUS34-907 3.2.2 Oil Return Operation in Heating Operation [Conditions to start] The heating oil-returning operation is started referring following conditions. Integrated amount of displaced oil Timer (After the power is turned on, integrated operating-time is 2 hours and subsequently every 8 hours.) In addition, integrated amount of displaced oil is derived from Tc, Te, and the compressor load.
SiUS34-907 3.3 Special Control Defrosting Operation The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered. [Conditions to start] The defrost operation is started referring following conditions. Outdoor heat exchanger heat transfer co-efficiency Temperature of heat-exchange (Tb) Timer (2 hours at the minimum) In addition, outdoor heat-exchange co-efficiency is derived from Tc, Te, and the compressor load.
Special Control 3.4 SiUS34-907 Pump Down Residual Operation When activating compressor, if the liquid refrigerant remains in the heatexchanger, the liquid enters into the compressor and dilutes oil therein resulting in decrease of lubricity. Therefore, the pump down residual operation is performed to collect the refrigerant in the heatexchanger when the compressor is down. 3.4.
SiUS34-907 3.5 Special Control Restart Standby Restart is stood by force to prevent frequent power-on/off and to equalize pressure in the refrigerant system. Actuator Operation Remarks Compressor OFF ⎯ Outdoor unit fan Ta>86°F: STEP 4 Ta≤86°F: OFF ⎯ Four-way valve (Y1S) Keep former condition. ⎯ Main electronic expansion valve (EV1) 0 pls ⎯ Subcooling electronic expansion valve (EV3) 0 pls ⎯ Hot gas bypass valve (SVP) OFF ⎯ Ending conditions 2 min. ⎯ 3.
Protection Control SiUS34-907 4. Protection Control 4.1 High Pressure Protection Control This high-pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure. [In cooling operation] Pc>503 psi High pressure not limited Pc: High-pressure sensor detection value INV. upper limit frequency=Max. High pressure limited INV.
SiUS34-907 4.2 Protection Control Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] Low pressure not limited Pe<36.3 psi Pe: Low-pressure sensor detection value Pe>56.6 psi Low pressure limited Hot gas SVP = OFF Pe<21.8 psi Pe>43.5 psi 36Hz Unload Hot gas SVP = ON Pe<10.2 psi Low-pressure standby When occurring 3 times within 30 min., the malfunction code "E4" is output.
Protection Control 4.3 SiUS34-907 Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. [INV. compressor] Discharge pipe protection control not limited or HTdi>239˚F Tp>275˚F INV. upper limit frequency: 1-step down from current compressor frequency & HTdi<212˚F Tp<230˚F HTdi :Value of INV.
SiUS34-907 4.4 Protection Control Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. [Inverter overcurrent protection control] Not limited & Inverter current >23.8A •Inverter current ≤ 23.8A •INV. upper limit frequency=max. Hz Limited INV. upper limit frequency: 1-step down from current compressor frequency •10 sec.
Other Control SiUS34-907 5. Other Control 5.1 Demand Operation In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting”. To operate the unit with this mode, additional setting of “Continuous Demand Setting”. [Demand 1 setting] Setting Demand 1 setting 1 Demand 1 setting 2 (factory setting) Demand 1 setting 3 Standard for upper limit of power consumption Approx. 60% Approx. 70% Approx.
SiUS34-907 Outline of Control (Indoor Unit) 6.1.2 When the Float Switch is Tripped while the Cooling Thermostat is OFF: *3. (Malfunction residual): The remote controller will display "A3" and the air conditioner will come to an abnormal stop if the float switch is turned OFF and not turned ON again within 5 minutes while the cooling thermo. is OFF. 6.1.
Outline of Control (Indoor Unit) SiUS34-907 6.1.4 When the Float Switch is Tripped and “AF” is Displayed on the Remote Controller: *4. (Malfunction residual): If the float switch is tripped five times in succession, a drain malfunction is determined to have occurred. “AF” is then displayed as operation continues. *5. (Malfunction residual): The remote controller will display "A3" and the air conditioner will come to an abnormal stop if the float switch is OFF for more than 5 minutes in the case of *4.
SiUS34-907 6.2 Outline of Control (Indoor Unit) Louver Control for Preventing Ceiling Dirt We have added a control feature that allows you to select the range of in which air direction can be adjusted in order to prevent the ceiling surrounding the air discharge outlet of ceiling mounted cassette type units from being soiled.
Outline of Control (Indoor Unit) 6.3 SiUS34-907 Thermostat Sensor in Remote Controller Temperature is controlled by both the thermostat sensor in remote controller and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor in remote controller is set to “Use.
SiUS34-907 Outline of Control (Indoor Unit) Heating When heating, the hot air rises to the top of the room, resulting in the temperature being lower near the floor where the occupants are. When controlling by body thermostat sensor only, the unit may therefore be turned off by the thermostat before the lower part of the room reaches the preset temperature.
Outline of Control (Indoor Unit) 6.4 SiUS34-907 Freeze Prevention Freeze Prevention by Off Cycle (Indoor Unit) When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit heat exchanger drops too low, the unit enters freeze prevention operation in accordance with the following conditions, and is also set in accordance with the conditions given below. Conditions for starting freeze prevention: Temperature is 30°F or less for total of 40 min.
SiUS34-907 6.5 Outline of Control (Indoor Unit) View of Operations of Swing Flaps Swing flaps work as following.
SiUS34-907 Part 6 Test Operation 1. Test Operation ..........................................................................................55 1.1 Procedure and Outline ............................................................................... 55 1.2 Operation when Power is Turned On ......................................................... 57 2. Outdoor Unit PCB Layout..........................................................................58 3. Field Setting ......................................
SiUS34-907 Test Operation 1. Test Operation 1.1 Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check Work Prior to Turn Power Supply On Check the below items.
Test Operation SiUS34-907 1.1.3 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code "U3" will be displayed.) Press and hold the TEST OPERATION button (BS4) on outdoor unit PCB for 5 seconds. Check on operation ⎧ The test operation is started automatically. ⎫ ⎪ The following judgements are conducted within 15 minutes(about 30 ⎪ at the maximum).
SiUS34-907 Test Operation 1.1.4 Confirmation on Normal Operation • • • • 1.2 Conduct normal unit operation after the check operation has been completed. (When outdoor air temperature is 75°FDB or higher, the unit can not be operated with heating mode. See the installation manual attached.) Confirm that the indoor/outdoor units can be operated normally.
Outdoor Unit PCB Layout SiUS34-907 2. Outdoor Unit PCB Layout Outdoor unit PCB Caution Cover electric parts with an insulating sheet during inspection to prevent electric shock.
SiUS34-907 Field Setting 3. Field Setting 3.1 Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description. Wrong setting may cause malfunction. When optional accessory is mounted on the indoor unit, setting for the indoor unit may be required to change. Refer to information in the option handbook. 3.1.
Field Setting SiUS34-907 6 7 6 Press Menu/OK button. Setting confirmation screen is displayed. 7 Select Yes and press Menu/OK button. Setting details are determined and field settings screen returns. 8 In the case of multiple setting Field Settings Save the settings? Yes No changes, repeat “3” to “7”. Setting 9 After all setting changes are completed, press Cancel button twice. 10 Backlight goes out, and “Checking the connection. Please stand by.
SiUS34-907 Field Setting 3.1.2 Wireless Remote Controller - Indoor Unit BRC7C812 BRC4C82 BRC7E818 BRC7E83 1. When in the normal mode, push the button for 4 seconds or more, and operation then enters the “field set mode.” 2. Select the desired “mode No.” with the button. 3. Pushing the button, select the first code No. 4. Pushing the button, select the second code No. 5. Push the timer button and check the settings. 6. Push the button to return to the normal mode.
Field Setting SiUS34-907 3.1.3 Simplified Remote Controller BRC2A51 BRC2C51 1. Remove the upper part of remote controller. 2. When in the normal mode, press the [BS6] BUTTON (O) (field set), and the FIELD SET MODE is entered. 3. Select the desired MODE No. with the [BS2] BUTTON (P) (temperature setting ) and the [BS3] BUTTON (P) (temperature setting ). 4. During group control, when setting by each indoor unit (mode No. 20, 22, and 23 have been selected), push the [BS8] (Q) BUTTON (unit No.
SiUS34-907 Field Setting 3.1.4 Setting Contents and Code No. – VRV Indoor unit : Factory setting Mode No. Note 2 Setting Contents 0 Ultra long-life Filter contamination heavy/ filter light (Setting for display time to clean air filter) (Sets display time to clean Long-life filter air filter to half when there is heavy filter contamination.) Standard filter Light Long-life filter type Long life filter 10(20) 1 VRV system 12(22) indoor unit settings 13(23) Second Code No. First Code No.
Field Setting SiUS34-907 3.1.
SiUS34-907 Field Setting 3.1.6 Detailed Explanation of Setting Modes (1) Filter Sign Setting If switching the filter sign ON time, set as given in the table below. Mode No. First Code No. Second Code No. Standard Long Life Ultra Long Life Setting 10 (20) 0 01 02 200 hrs. 100 hrs. 2,500 hrs. 1,250 hrs. 10,000 hrs. 5,000 hrs. Contamination Light Contamination Heavy (2) Ultra Long Life Filter Sign Setting When a Ultra long-life filter is installed, the filter sign timer setting must be changed.
Field Setting SiUS34-907 (6) External ON/OFF Input This input is used for "ON/OFF operation" and "Protection device input" from the outside. The input is performed from the T1-T2 terminal of the operation terminal block (X1A) in the electric component box. F2 T1 T2 Forced stop Input A Mode No. First Code No. Second Code No.
SiUS34-907 Field Setting (10) Auto Restart after Power Failure Reset For the air conditioners with no setting for the function (same as factory setting), the units will be left in the stop condition when the power supply is reset automatically after power failure reset or the main power supply is turned on again after once turned off.
Field Setting SiUS34-907 (13) Airflow Direction Setting Set the airflow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory setting to “01.” Mode No. First Code No. Second Code No.
SiUS34-907 Field Setting 3.1.7 Centralized Control Group No. Setting BRC1E Type In order to conduct the centralized remote control using the centralized remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller. Make Group No. settings for centralized remote control using the operating remote controller. (1) 1. Press and hold Cancel button for 4 seconds or more. Service Settings menu in displayed. 2.
Field Setting SiUS34-907 BRC7C Type / BRC7E Type / BRC4C Type Group No. setting by wireless remote controller for centralized control 1. When in the normal mode, push “ ” button for 4 seconds or more, and operation then enters the “field set mode.” 2. Set mode No. “00” with “ ” button. 3. Set the group No. for each group with “ ”“ ” button (advance/backward). 4. Enter the selected group numbers by pushing “ ” button. 5. Push “ ” button and return to the normal mode.
SiUS34-907 Field Setting Group No.
Field Setting SiUS34-907 How to Select Operation Mode Whether operation by remote controller will be possible or not for turning on/off, controlling temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below.
SiUS34-907 3.2 Field Setting Field Setting from Outdoor Unit 3.2.1 Setting by Dip Switches The following field settings are made by dip switches on PCB. Dipswitch No. DS1-1 DS1-2 Test Operation Setting ON OFF (Factory setting) ON OFF (Factory setting) Setting item Cool / Heat change over setting Not used Description Used to set cool / heat change over setting by remote controller equipped with outdoor unit. Do not change the factory settings.
Field Setting Caution SiUS34-907 DIP switch Setting after changing the main PCB(A1P) to spare parts PCB When you change the main PCB(A1P) to spare parts PCB, please carry out the following setting. Please Attach the Capacity Setting Adaptor corresponding to Capacity Class (ex. 112, 140, 160) in connector X51A.
SiUS34-907 Field Setting Setting by push button switches The following settings are made by push button switches on PCB. H1P H2P H3P H4P H5P H6P H7P h h k h h h h LED indication (Factory setting) BS1 BS2 BS3 BS4 BS5 MODE SET RETURN TEST RESET There are the following three setting modes. Setting mode 1 (H1P off) Initial status (when normal) : Also indicates during “abnormal”. Setting mode 2 (H1P on) Used to modify the operating status and to set program addresses, etc.
Field Setting SiUS34-907 a. “Setting mode 1” This mode is used to set and check the following items. 1. Set items ············ In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. • COOL/HEAT selection (IND) ····················· Used to select COOL or HEAT by individual outdoor unit (factory setting). • COOL/HEAT selection (MASTER) ············Used to select COOL or HEAT by outdoor unit group with the master unit.
SiUS34-907 b. “Setting mode 2” Push and hold the MODE (BS1) button for 5 seconds and set to “Setting mode 2”. Field Setting No.
Field Setting SiUS34-907 Setting item display No.
SiUS34-907 Field Setting Setting item display No.
Field Setting SiUS34-907 c. Monitor mode No. To enter the monitor mode, push the MODE (BS1) button when in “Setting mode 1”. Push the SET (BS2) button and set the LED display to a setting item. Push the RETURN (BS3) button to display different data of set items. Push the RETURN (BS3) button and switches to the initial status of “Monitor mode”.
SiUS34-907 Field Setting Push the SET button and match with the LEDs No. 1 - 15, push the RETURN button, and confirm the data for each setting. Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: l hlhllh 16 32 4 8 1 2 In the address is 010110 (binary number), which translates to 16 + 4 + 2 = 22 (base 10 number). In other words, the address is 22. lhh hlhl 64 16 No.12 128 32 lhh hllh 4 No.13 8 The No.
Field Setting SiUS34-907 3.2.2 Cool / Heat Mode Switching There are the following 4 cool/heat switching modes. Set cool/heat separately for each outdoor unit system by indoor unit remote controller. Set cool/heat separately for each outdoor unit system by cool/heat switching remote controller. Set cool/heat for more than one outdoor unit system simultaneously in accordance with unified master outdoor unit by indoor unit remote controller.
SiUS34-907 Field Setting Set Cool / Heat Separately for Each Outdoor Unit System by Cool/Heat Switching Remote Controller It does not matter whether or not there is outdoor - outdoor unit wiring. Set outdoor unit PCB DS1-1 to OUT (factory setting). Set cool/heat switching to IND (individual) for “Setting mode 1” (factory setting).
Field Setting SiUS34-907 3.2.3 Setting of Low Noise Operation and Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise by 2-3 dB. When the low noise operation is carried out automatically at night (The external control adaptor for outdoor unit is not required) 1. While in "Setting mode 2", select the setting condition (i.e.
SiUS34-907 Field Setting Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adaptor (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. Set item Demand Condition Content Mode 1 Mode 2 The compressor operates at approx. 60% or less of rating. The compressor operates at approx. 70% or less of rating. Mode 3 The compressor operates at approx. 80% or less of rating.
Field Setting SiUS34-907 : ON Setting No. Setting contents 12 External low noise setting / Demand setting Setting No. indication Setting No.
SiUS34-907 Field Setting 3.2.4 Setting of Refrigerant Additional Charging Operation * Test Operation When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from the stop valve on the liquid side, make sure to charge the remaining quantity of refrigerant using this procedure. If the refrigerant quantity is insufficient, the unit may malfunction. Turn ON the power of the indoor unit and the outdoor unit.
Field Setting SiUS34-907 3.2.5 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of indoor and outdoor units. All indoor and outdoor unit’s operation are prohibited. [Operation procedure] In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON. The respective expansion valve of indoor and outdoor units are fully opened.
SiUS34-907 Field Setting 3.2.6 Setting of Vacuuming Mode In order to perform vacuuming operation at site, fully open the expansion valves of indoor and outdoor units and turn on some solenoid valves. [Operating procedure] In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON. The respective expansion valve of indoor and outdoor units are fully opened.
SiUS34-907 Part 7 Troubleshooting 1. Symptom-based Troubleshooting ............................................................. 92 2. Troubleshooting by Remote Controller .....................................................95 2.1 2.2 2.3 2.4 Self-diagnosis by Wired Remote Controller ............................................... 96 Self-diagnosis by Wireless Remote Controller ........................................... 97 Remote Controller Maintenance Mode...............................................
SiUS34-907 3.30 3.31 3.32 3.33 3.34 3.35 3.36 3.37 3.38 3.39 3.40 3.41 3.42 3.43 3.44 3.45 3.46 3.47 “L4” Malfunction of Inverter Radiation Fin Temperature Rise ................... 159 “L5” Inverter Compressor Abnormal ......................................................... 162 “L8” Inverter Current Abnormal ................................................................. 164 “L9” Inverter Compressor Start up Error ...................................................
Symptom-based Troubleshooting SiUS34-907 1. Symptom-based Troubleshooting Symptom 1 Supposed Cause The system does not start operation at all. Blowout of fuse(s) Cutout of breaker(s) Countermeasure Turn Off the power supply and then replace the fuse(s). • If the knob of any breaker is in its OFF position, turn ON the power supply. • If the knob of any circuit breaker is in its tripped position, do not turn ON the power supply.
SiUS34-907 Symptom-based Troubleshooting Symptom 6 7 8 9 COOL-HEAT selection is disabled. Supposed Cause Countermeasure The remote controller displays UNDER CENTRALIZED CONTROL. The remote controller displays UNDER CENTRALIZED CONTROL, and the COOLHEAT selection remote controller is provided. This remote controller has no option Use a remote controller with option to select cooling operation. to select cooling operation. The system conducts fan operation but not cooling or heating operation.
Symptom-based Troubleshooting Symptom 11 The system produces sounds. SiUS34-907 Supposed Cause Countermeasure Immediately after turning ON the power supply, indoor unit produces "ringing" sounds. "Hissing" sounds are continuously produced while in cooling or defrosting operation. These are operating sounds of the electronic expansion valve of the indoor unit. Normal operation. This sound becomes low after a lapse of approximately one minute.
SiUS34-907 Troubleshooting by Remote Controller 2. Troubleshooting by Remote Controller On power-up, the message Checking the connection. Please stand by. is displayed on the remote controller screen. Then that message is no longer displayed and the basic screen displays. . To access a mode from the basic screen, refer to the figure below. When any of the operation buttons is pressed, the backlight will come on and remains lit for about 30 seconds.
Troubleshooting by Remote Controller 2.1 SiUS34-907 Self-diagnosis by Wired Remote Controller The following will be displayed on the screen when a error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp Mode Menu OK Fan Speed Cancel (1) Checking a error or warning Operation Status Display Abnormal shutdown The system stops operating. The operation lamp (green) starts to blink.
SiUS34-907 2.2 Troubleshooting by Remote Controller Self-diagnosis by Wireless Remote Controller In the Case of BRC7C Type / BRC7E Type / BRC4C Type If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes. The malfunction code can be determined by following the procedure described below. (The malfunction code is displayed when an operation error has occurred. In normal condition, the malfunction code of the last problem is displayed.) 1.
Troubleshooting by Remote Controller SiUS34-907 The right-side digit of the code changes as shown below when the UP and DOWN buttons are pressed.
SiUS34-907 2.3 Troubleshooting by Remote Controller Remote Controller Maintenance Mode How to Enter the Maintenance Mode Maintenance Mode Operation Method 1. Select the mode No. Select the desired item from the Maintenance menu, and then press Menu/OK button. 2. Select the Item 2. Select the desired Unit No. using the / (Up/Down) buttons. The corresponding data is displayed. For details, refer to the table in next page.
Troubleshooting by Remote Controller Maintenance Menu 1. Model Name 2. Operating Hours 3. Indoor Unit Status Item 2 1. Unit No. 2. Indoor unit 3. Outdoor unit 1. Unit No. 2. Indoor unit operating time 3. Indoor fan operation 4. Indoor unit energized time 5. Outdoor operating time 6. Outdoor fan 1 operation 7. Outdoor fan 2 operation 8. Outdoor comp. 1 operation 9. Outdoor comp. 2 operation 1. Unit No. 2. FAN 3. FLAP 4. Speed 5. EV 6. MP 7. EH 8. Hu 9. TBF 10.FLOAT 11.T1/T2 12.Unit No. 13.Th1 14.Th2 15.
SiUS34-907 Maintenance Menu 6. Error Display Item 2 1. Display Warning ON 2. Display Warning OFF 3. Display Error ON 4. Display Error OFF 7. Swap Unit No. 1. Current Unit No. 2. Transfer Unit No. 8. Addressed Sensor Value Unit No.: 0 - 15 Code 00: 01: 02: 03: 04: 05: 06: 07: 08: 09: Data Troubleshooting Troubleshooting by Remote Controller Remarks Displays a warning on the screen if an error occurs. No warning is displayed. Displays the error on the screen. Displays neither errors nor warnings.
Troubleshooting by Remote Controller 2.4 SiUS34-907 Remote Controller Self-Diagnosis Function The following will be displayed on the screen when a error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp Mode Menu OK Fan Speed Cancel (1) Checking a error or warning Operation Status Display Abnormal shutdown The system stops operating. The operation lamp (green) starts to blink.
SiUS34-907 Troubleshooting by Remote Controller k : ON Indoor Unit Malfunction code A0 Outdoor Unit Troubleshooting h : OFF Operation Malfunction contents lamp l Error of External Protection Device l : Blink Page Referred 109 A1 A3 l l PCB Defect Malfunction of Drain Level Control System (S1L) 110 111 A6 l Fan Motor (M1F) Lock, Overload A7 k Malfunction of Swing Flap Motor (M1S) 113 115 116 119 A9 AF l k Malfunction of Moving Part of Electronic Expansion Valve (Y1E) Drain Level above
Troubleshooting by Remote Controller SiUS34-907 k : ON System Centralized Remote Controller and Schedule Timer Heat Reclaim Ventilation Malfunction code U0 h : OFF Operation Malfunction contents lamp k Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure l : Blink Page Referred 173 U1 U2 l l Reverse Phase, Open Phase Power Supply Insufficient or Instantaneous Failure — 175 U3 U4 l l Check Operation not Executed Malfunction of Transmission between Indoor Units 1
SiUS34-907 Troubleshooting by Remote Controller Malfunction code indication by outdoor unit PCB Contents of malfunction To enter the monitor mode, push the MODE (BS1) button when in “Setting mode 1”.
Troubleshooting by Remote Controller SiUS34-907 k : ON Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 h : OFF l : Blink Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P E7 l l l l l h h h h h h h l l l h l h h l l l h l l E9 l l h h l H9 l l h h l l l l l l l l l l l l l h h h h l h l l l l h l J5 l h l h l J6 l h l
SiUS34-907 Troubleshooting by Remote Controller Contents of malfunction To enter the monitor mode, push the MODE (BS1) button when in “Setting mode 1”.
Troubleshooting by Remote Controller SiUS34-907 k : ON h : OFF l : Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P P1 l l h h h l h h h l l h h h h l h h P4 U0 l l h h l U2 h l h h l h h h h l h h l l h h h h h l h h l l l l l l l l l l h h h h h h h h h h h h h h h h h h h
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3. Troubleshooting by Indication on the Remote Controller 3.1 “A0” Error of External Protection Device Remote A0 Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Detect open or short circuit between external input terminals in indoor unit.
Troubleshooting by Indication on the Remote Controller 3.2 SiUS34-907 “A1 ” PCB Defect A1 Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Check data from E²PROM. Malfunction Decision Conditions When data could not be correctly received from the E²PROM E²PROM : Type of nonvolatile memory. Maintains memory contents even when the power supply is turned off.
SiUS34-907 3.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Is power supply 208~230V provided? NO Provide 208~230V power supply. YES The float switch is connected to X8A (or X15A) of the indoor unit PCB. NO YES The float switch contact is forming a short circuit.
SiUS34-907 3.4 Troubleshooting by Indication on the Remote Controller “A6” Fan Motor (M1F) Lock, Overload Remote Controller Display A6 Applicable Models FXAQ, FXFQ Method of Malfunction Detection Abnormal fan revolutions are detected by a signal output from the fan motor.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign matters around the fan? YES Remove the foreign matters. NO Is the connector (X20A or X4A) for the fan motor properly connected to the indoor unit PCB? (*1) NO Properly connect the connector.
SiUS34-907 Troubleshooting by Indication on the Remote Controller “A6” Malfunction of Indoor Unit Fan Motor A6 Remote Controller Display Applicable Models FXHQ, FXDQ Method of Malfunction Detection This malfunction is detected if there is no revolutions detection signal output from the fan motor. Malfunction Decision Conditions When no revolutions can be detected even at the maximum output voltage to the fan.
Troubleshooting by Indication on the Remote Controller Remote Controller Display SiUS34-907 A6 Applicable Models FXMQ Method of Malfunction Detection Detection from the current flow on the fan PCB Detection from the RPM of the fan motor in operation Detection from the position signal of the fan motor Detection from the current flow on the fan PCB when the fan motor starting operation Malfunction Decision Conditions An overcurrent flows. The RPM is less than a certain level for 6 seconds.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Turn off the power and wait for 10 minutes. There is a foreign matter around the fan. YES Remove the foreign matter. NO The fan motor connectors (X1A and X2A ) of the fan PCB (A2P) are disconnected. YES Connect correctly.
Troubleshooting by Indication on the Remote Controller SiUS34-907 A The resistors among U, V, and W are unbalanced or short-circuited. NO Replace the fan motor. YES Remove the signal connector from the fan motor and check the resistance (*2). Between VCC and GND terminals, and between GND and HW, HV, or HU terminals are short-circuited. YES Replace the fan motor. NO Turn on the power. The HAP lamp of the indoor unit PCB (A1P) blinks and the HAP lamp of the fan PCB (A2P) is off.
SiUS34-907 3.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Is power supply 208~230V provided? NO Provide 208~230V power supply. YES Indoor unit is a model equipped with a swing flap function. NO Replace the indoor unit PCB. YES The swing motor works when the power supply is turned off and then back on.
SiUS34-907 3.6 Troubleshooting by Indication on the Remote Controller “A9 ” Malfunction of Moving Part of Electronic Expansion Valve (Y1E) A9 Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Check coil condition of electronic expansion valve by using micro-computer Malfunction Decision Conditions Pin input for electronic expansion valve coil is abnormal when initializing micro-computer.
Troubleshooting by Indication on the Remote Controller SiUS34-907 ∗1: Coil check method for the moving part of the electronic expansion valve Discount the electronic expansion valve from the PCB and check the continuity between the connector pins. (Normal) Pin No. 1. White 2. Yellow 3. Orange 4. Blue 5. Red 1. White 2. Yellow 3. Orange 4. Blue 5. Red 6. Brown × Approx. 300Ω × × Approx. 150Ω × × Approx. 300Ω × Approx. 150Ω × Approx. 150Ω × Approx. 150Ω × 6.
SiUS34-907 3.7 Troubleshooting by Indication on the Remote Controller “AF ” Drain Level above Limit AF Remote Controller Display Applicable Models FXMQ, FXDQ Method of Malfunction Detection Water leakage is detected based on float switch ON/OFF operation while the compressor is in nonoperation.
Troubleshooting by Indication on the Remote Controller 3.8 SiUS34-907 “AJ ” Malfunction of Capacity Determination Device Remote controller display AJ Applicable Models All indoor unit models Method of Malfunction Detection Capacity is determined according to resistance of the capacity setting adaptor and the memory inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined. Malfunction Decision Conditions Operation and: 1.
SiUS34-907 3.9 Troubleshooting by Indication on the Remote Controller “C4 ” Malfunction of Thermistor (R2T) for Heat Exchanger C4 Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temperature detected by heat exchanger thermistor. Malfunction Decision Conditions When the heat exchanger thermistor becomes disconnected or shorted while the unit is running.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.10 “C5” Malfunction of Thermistor (R3T) for Gas Pipe C5 Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temperature detected by gas pipe thermistor.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.11 “C9” Malfunction of Thermistor (R1T) for Suction Air C9 Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temperature detected by suction air temperature thermistor.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.12 “CJ” Malfunction of Thermostat Sensor in Remote Controller CJ Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temperature detected by remote controller air temperature thermistor.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.13 “E1” PCB Defect E1 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Abnormality is detected under the communication conditions in the hardware section between the indoor unit and outdoor unit.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.14 “E3” Actuation of High Pressure Switch Remote Controller Display E3 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Decision Conditions Error is generated when the high pressure switch activation count reaches the number specific to the operation mode.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check for the points shown below. Is the stop valve open? Is the high pressure switch connector properly connected to the main PCB? Does the high pressure switch have continuity? Are the three points above OK? NO Rectify defective points, if any.
Troubleshooting by Indication on the Remote Controller SiUS34-907 *1: Make a comparison between the voltage of the pressure sensor and that read by the pressure gauge. For the pressure sensor voltage, measure voltage at the connector, and then convert it to pressure according to information on P.243.) *2: Take the measurement of voltage of the pressure sensor.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.15 “E4” Actuation of Low Pressure Sensor Remote Controller Display E4 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Decision Conditions Error is generated when the low pressure is dropped under specific pressure. Operating pressure:10.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. NO Is the stop valve open? Open the stop valve. YES Mount a pressure gauge on the low pressure service port. Reset the operation using the remote controller, and then restart the operation. Are the characteristics of the low pressure sensor normal? (*1.) NO Replace the low pressure sensor.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.16 “E5” Inverter Compressor Motor Lock Remote Controller Display E5 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Inverter PCB takes the position signal from UVW line connected between the inverter and compressor, and the malfunction is detected when any abnormality is observed in the phasecurrent waveform.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if the stop valve is open. NO Local factor Open the stop valve. YES Check if the relay wires to the compressor are correct. NO YES Check if the connection of UVW phase order is correct. NO Replace the connecting wires and ensure right connection of the connector. Ensure correct connection.
SiUS34-907 Troubleshooting by Indication on the Remote Controller A Power OFF Power ON Measure the inverter output voltage (*2). Note: Measurement should be made while the frequency is stable. Check if the inverter output voltage between 3 phases is within ± 5V. NO Replace the inverter PCB. YES Replace the inverter compressor. *1: Pressure difference between high pressure and low pressure before starting. *2: The quality of power transistors / diode modules can be judged by executing CHECK 4 (P.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.17 “E7” Malfunction of Outdoor Unit Fan Motor Remote Controller Display E7 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Detect a malfunction based on the current value in the inverter PCB (as for motor 2, current value in the fan PCB). Detect a malfunction for the fan motor circuit based on the number of rotation detected by hole IC during the fan motor operation.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check in the monitor mode 4HP ~ 5HP class models have 2 fans. Check electric motor (electric motor 1 or 2) corresponding to malfunction code “E7” in the monitor mode of outdoor unit PCB. (Refer to P.104, 105 for how to check) Cut the power supply OFF and wait for 10 minutes.
Troubleshooting by Indication on the Remote Controller SiUS34-907 A No continuity of fuse (F6U) on main PCB (A1P). YES Replace the PCB (A1P). NO Unable to rotate the fan manually with ease when removing the connector of the fan motor. YES Replace the corresponding fan motor. NO Resistance value between the power supply wire terminal of fan motor and the motor frame (metal) is 145 psi and below. YES Replace the corresponding fan motor. NO CHECK 5 (Refer to P.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.18 “E9” Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) Remote Controller Display E9 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Check disconnection of connector To be detected based on continuity existence of coil of electronic expansion valve Malfunction Decision Conditions No current is detected in the common (COM [+]) when power supply is ON.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged Turn power supply off, and turn power supply on again. Return to normal? YES NO External factor other than malfunction (noise, for example). Check the electronic expansion valve corresponding to the malfunction code “E9” in the monitor mode. (Refer to P.105, 106 for how to check.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.19 “F3” Abnormal Discharge Pipe Temperature (R2T) Remote Controller Display F3 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Abnormality is detected according to the temperature detected by the discharge pipe thermistor.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Connect the service checker. Press reset and start operation again. Check if discharge pipe thermistor property is normal. (*1) NO Replace the discharge pipe thermistor (R2T).
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.20 “F6” Refrigerant Overcharged F6 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Excessive charging of refrigerant is detected by using the outside air temperature, heat exchanging deicer temperature and liquid pipe temperature during a check run.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.21 “H9” Malfunction of Thermistor (R1T) for Outdoor Air H9 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature detected by the outdoor air thermistor.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.22 “J3” Malfunction of Discharge Pipe Thermistor (R2T) J3 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature detected by discharge pipe temperature thermistor. Malfunction Decision Conditions When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.23 “J5” Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2 J5 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.24 “J6” Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger J6 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature detected by the heat exchanger thermistor.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.25 “J7” Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe J7 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature detected by the liquid pipe thermistor.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.26 “J9” Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) J9 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor. Malfunction Decision Conditions When the subcooling heat exchanger gas pipe thermistor is short circuit or open circuit.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.27 “JA” Malfunction of High Pressure Sensor Remote Controller Display JA Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Decision Conditions When the high pressure sensor is short circuit or open circuit (Not less than 612psi, or 1.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Confirm which high pressure sensor is abnormal using outdoor unit "monitor mode". (Refer to P.105, 106) 1.Set the high pressure gauge upright. 2.Connect the checker for VRV to the gauge.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.28 “JC” Malfunction of Low Pressure Sensor Remote Controller Display JC Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from pressure detected by low pressure sensor. Malfunction Decision Conditions When the low pressure sensor is short circuit or open circuit (Not less than 257psi, or 1.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Confirm which low pressure sensor is abnormal using outdoor unit "monitor mode". (Refer to P.105, 106) 1.Set the low pressure gauge upright. 2.Connect the checker for VRV to the gauge.
Troubleshooting by Indication on the Remote Controller SiUS34-907 ∗1: Voltage measurement point ∗2: Refer to “Pressure Sensor, Pressure / Voltage Characteristics” table on P.243.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.29 “L1” Malfunction of PCB Remote Controller Display L1 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected based on the current value during waveform output before starting compressor. Malfunction is detected based on the value from current sensor during synchronous operation when starting the unit.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Turn OFF the power supply once, and then check the compressor lead wires. Do the lead wires have any disconnection, broken wire, short circuit, or ground fault? YES Replace the lead wires. NO Turn ON the power supply again.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.30 “L4” Malfunction of Inverter Radiation Fin Temperature Rise Remote Controller Display L4 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Fin temperature is detected by the thermistor of the radiation fin.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. The radiation fin of the main PCB concerned exceeded a temperature of 181°F. YES NO Faulty radiation from the power unit • Blocked air suction port • Stained radiation fin • High outdoor temperature Turn OFF the power supply, and then make measurement of resistance of the radiation fin thermistor.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Main PCB ∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P.241.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.31 “L5” Inverter Compressor Abnormal Remote Controller Display L5 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from current flowing in the power transistor. Malfunction Decision Conditions When an excessive current flows in the power transistor (Instantaneous overcurrent also causes activation.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Compressor inspection Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if the stop valve is open. NO Open the stop valve. YES Check if the compressor lead wires are normal. NO Replace the compressor lead wires. YES Check if the wiring and connection to the compressor are normal. NO Correct the wiring and connection.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.32 “L8” Inverter Current Abnormal Remote Controller Display L8 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected by current flowing in the power transistor. Malfunction Decision Conditions When overload in the compressor is detected. (Inverter secondary current 16.1A) (1) 19.0A and over continues for 5 seconds. (2) 16.1A and over continues for 260 seconds.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if the stop valve is open. NO Open the stop valve. YES Check if the compressor lead wires are normal. NO Replace the compressor lead wires. YES Check if the wiring and connection to the compressor are normal. Power OFF NO Correct the wiring and connection.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.33 “L9” Inverter Compressor Start up Error Remote Controller Display L9 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Detect the failure based on the signal waveform of the compressor. Malfunction Decision Conditions Starting the compressor does not complete.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if it is the first time to start after installation. NO Continued to A (on the following page) YES Check if a right amount of refrigerant is charged. NO Charge a right amount of refrigerant. YES Check if the stop valve is open. NO Open the stop valve. YES Refrigerant is inactive.
Troubleshooting by Indication on the Remote Controller SiUS34-907 A Refrigerant is inactive. ( The unit is out of power supply for more than 6 hours.) NO Cancel the inactive state of refrigerant. YES Check if the insulation resistance of the compressor is 100kW or over. NO Replace the inverter compressor. YES Is inside the compressor broken? YES Replace the inverter compressor. NO CHECK 4 Check if the power transistor is normal. NO Replace the main PCB (A1P).
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.34 “P1” High Voltage of Capacitor in Main Inverter Circuit Remote Controller Display P1 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Imbalance in supply voltage is detected in PCB. Malfunction Decision Conditions When the imbalance in the power supply voltage becomes more than 6V The unit operation is continued without malfunction decision. “P1” will be displayed by pressing the inspection button.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Imbalance in supplied voltage is in excess of 14 V (Y1). *1 YES Open phase? NO YES Open phase Normalize field cause. NO Fix power supply voltage imbalance.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.35 “P4” Malfunction of Inverter Radiating Fin Temperature Rise Sensor P4 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Resistance of radiation fin thermistor is detected when the compressor is not operating.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Main PCB ∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P.241.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.36 “U0” Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display U0 Applicable Models RXYMQ36 · 48PVJU Malfunction Decision Conditions [In cooling mode] Low pressure becomes 14.5psi or below. [In heating mode] The degree of superheat of suction gas becomes 36 degrees and over.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. In cooling mode Set up a pressure gauge at the service port on the low pressure side. Check if the low pressure is 14.5 psi or below. ( 1) NO YES Check if the property of low pressure sensor is normal. ( 2) NO Replace the low pressure sensor. YES Replace the main PCB (A1P).
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.37 “U2” Power Supply Insufficient or Instantaneous Failure Remote Controller Display U2 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check for power supply voltage. Voltage between phases: 380 to 415V Phase voltage: 220 to 240V NO YES Power ON Unbalanced power supply? (Not more than 2%: Phase voltage of not more than approx.
SiUS34-907 Troubleshooting by Indication on the Remote Controller A Check the fan driver power transistor. Has the power transistor got faulty? Power OFF YES NO Has the main PCB caused damage? YES NO Has the fan driver caused damage? YES NO Replace the main PCB (A1P). Observe the conditions of the PCB. Replace the main PCB. *If the PCB replaced is badly damaged, the compressor is likely to fail. To make sure, recheck the compressor. Replace the main PCB.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.38 “U3” Check Operation is not Executed U3 Remote Controller Display Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Check operation is executed or not Malfunction Decision Conditions Malfunction is decided when the unit starts operation without check operation. Supposed Causes Check operation is not executed.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.39 “U4” Malfunction of Transmission between Indoor Units and Outdoor Units Remote Controller Display U4 Applicable Models All indoor unit models RXYMQ36 · 48PVJU Method of Malfunction Detection Micro-computer checks if transmission between indoor and outdoor units is normal.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check the detailed malfunction status in the monitor mode. (Refer to P.105, 106 for how to check.) In confirmation of malfunction 4, LED lamp indicates as follows: Go on to P.182. LED lamp display NO ( ) YES Check if indoor unit PCB or outdoor unit PCB has been replaced.
SiUS34-907 Troubleshooting by Indication on the Remote Controller A Check if the indoor/outdoor, outdoor/outdoor connecting wires are normal. NO Correct the connecting wires. NO Replace the main PCB of outdoor unit. YES Check if the operation is normal with 1 circuit after outdoor/outdoor connecting wires are removed. YES Fix DIII-NET expander adaptor.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Continued from the previous page In confirmation of malfunction 4, LED lamp indicates as follows: ( ) Start operation of all the indoor units. Check if all the units indicate “U9”. NO Continue operation. YES Check if more than 2 minutes passed since “U9”was indicated.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.40 “U5” Malfunction of Transmission between Remote Controller and Indoor Unit Remote Controller Display U5 Applicable Models All indoor unit models Method of Malfunction Detection If controlling with 2remote controllers, check the system using a micro-computer to ensure that the signal transmission between the indoor unit and the remote controllers (main and sub) is normal.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Using 2 remote controllers control. YES NO YES Operation returns to normal when the power is turned off momentarily. NO Set one remote controller to "SUB"; turn the power supply off once and then back on. Replace the indoor unit PCB. YES There is a possibility of malfunction caused by noise.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.41 “U8” Malfunction of Transmission between Main and Sub Remote Controllers U8 Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection If controlling with 2remote controllers, check the system using a micro-computer to ensure that the signal transmission between the indoor unit and the remote controllers (main and sub) is normal.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.42 “U9” Malfunction of Transmission between Indoor Units and Outdoor Units in the Same System U9 Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection Detect malfunction signal for the other indoor units within the circuit by outdoor unit PCB. Malfunction Decision Conditions When the malfunction decision is made on any other indoor unit within the system.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.43 “UA” Improper Combination of Indoor and Outdoor Units etc. UA Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection A difference occurs in data by the type of refrigerant between indoor and outdoor units. The number of indoor units is out of the allowable range. Incorrect signals are transmitted among the indoor unit and outdoor unit.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Diagnosis Flow 1 Confirmation of Confirmation of malfunction 3 malfunction 4 The number of indoor units connected to the same refrigerant circuit system should not be more than 64 units. YES Replace the main PCB of the outdoor unit. NO The number of indoor units exceeds the standard. Check the connection to correct.
SiUS34-907 Troubleshooting by Indication on the Remote Controller Caution Confirmation of malfunction 3 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Confirmation of Check if the outdoor unit PCB is replaced with PCB for spare parts. NO Check if the unit is not connected to outdoor units of different models. NO Replace the main PCB of the outdoor unit. YES YES Check the model of the outdoor unit.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.44 “UC” Address Duplication of Centralized Remote Controller UC Remote Controller Display Applicable Models All indoor unit models Method of Malfunction Detection The principal indoor unit detects the same address as that of its own on any other indoor unit. Malfunction Decision Conditions The malfunction decision is made as soon as the abnormality is detected.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.45 “UE” Malfunction of Transmission between Centralized Remote Controller and Indoor Unit Remote Controller Display UE Applicable Models All indoor unit models Centralized remote controller, intelligent Touch Controller, Schedule timer Method of Malfunction Detection Micro-computer checks if transmission between indoor unit and centralized remote controller is normal.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check the indoor unit for which “UE” is displayed.
SiUS34-907 Troubleshooting by Indication on the Remote Controller A Check the transmission wiring between centralized remote controller for any broken wire. CHECK 8 Abnormal Correct the wiring. Normal Check the transmission wiring with the master unit centralized remote controller for any broken wire. CHECK 8 Abnormal Correct the wiring. Normal Has the master unit central setting connector been connected? NO Correct the connection of the connector.
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.46 “UF” System is not Set yet UF Remote Controller Display Applicable Models All indoor unit models RXYMQ36 · 48PVJU Method of Malfunction Detection On check operation, the number of indoor units in terms of transmission is not corresponding to that of indoor units that have made changes in temperature.
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.47 “UH” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display UH Applicable Models All indoor unit models RXYMQ36 · 48PVJU Method of Malfunction Detection Detect an indoor unit with no auto address setting. Malfunction Decision Conditions The malfunction decision is made as soon as the abnormality is detected.
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Is electricity being introduced for the first time after installation or after an indoor or outdoor unit PCB has been replaced? YES NO YES After fixing incorrect wiring, push and hold the RESET button on the outdoor unit PCB for 5 seconds.
SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) 4. Troubleshooting (OP: Centralized Remote Controller) 4.1 “M1” PCB Defect Remote M1 Controller Display Applicable Models Centralized remote controller Schedule timer Method of Malfunction Detection Detect an abnormality in the DIII-NET polarity circuit. Malfunction Decision Conditions When + polarity and - polarity are detected at the same time.
Troubleshooting (OP: Centralized Remote Controller) 4.2 SiUS34-907 “M8” Malfunction of Transmission between Optional Controllers for Centralized Control Remote Controller Display M8 Applicable Models Centralized remote controller / intelligent Touch Controller Schedule timer Method of Malfunction Detection Detect the malfunction according to DIII-NET transmission data. (The system will be automatically reset.
SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Were any changes made to the number of units of centralized remote controller? (The centralized remote controller was connected once, and then disconnected, or additional centralized remote controller was installed.) YES Reset the power supplies of every centralized remote controller.
Troubleshooting (OP: Centralized Remote Controller) 4.3 SiUS34-907 “MA” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display MA Applicable Models Centralized remote controller Schedule timer Method of Malfunction Detection Detect the malfunction according to DIII-NET transmission data. Malfunction Decision Conditions When the schedule timer is set to individual-use mode, another central component is present.
SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Has the remote control adaptor (KRP2A series) been connected? YES Not available for combined use with the remote control adaptor. Dismount the remote control adaptor, and then reset power supplies of every centralized remote controller.
Troubleshooting (OP: Centralized Remote Controller) 4.4 SiUS34-907 “MC” Address Duplication, Improper Setting Remote Controller Display MC Applicable Models Centralized remote controller Schedule timer Method of Malfunction Detection Detect the malfunction according to DIII-NET transmission data.
SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
Troubleshooting (OP: Unified ON/OFF Controller) SiUS34-907 5. Troubleshooting (OP: Unified ON/OFF Controller) 5.1 Operation Lamp Blinks Remote Controller Display Operation lamp blinks Applicable Models All model of indoor units Unified ON/OFF controller Method of Malfunction Detection Detect the malfunction according to DIII-NET transmission data.
SiUS34-907 Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Is a malfunction code displayed on the remote controller? YES Diagnose the cause with the air conditioner's failure diagnosis manual. NO Has a once connected indoor unit been removed or its address changed? YES Reset power supply for all optional controllers for centralized control simultaneously.
Troubleshooting (OP: Unified ON/OFF Controller) 5.2 SiUS34-907 Display “Under Centralized Control” Blinks (Repeats Single Blink) Remote Controller Display “under centralized control” (Repeats single blink) Applicable Models Unified ON/OFF controller Centralized remote controller, Schedule timer Method of Malfunction Detection Detect the malfunction according to DIII-NET transmission data. Malfunction Decision Conditions When the centralized controller, which was connected once, shows no response.
SiUS34-907 Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Has a once connected optional controller for centralized control been disconnected or its address changed? YES Reset power supply simultaneously for all optional controllers for centralized control.
Troubleshooting (OP: Unified ON/OFF Controller) SiUS34-907 A Is the wiring adaptor for electrical appendices connected? YES Cannot be used in combination with a wiring adaptor for electrical appendices. Remove the wiring adaptor for electrical appendices and reset the power supply for all optional controllers for centralized control simultaneously.
SiUS34-907 5.3 Troubleshooting (OP: Unified ON/OFF Controller) Display “Under Centralized Control” Blinks (Repeats Double Blink) Remote Controller Display “under centralized control” (Repeats double blink) Applicable Models Unified ON/OFF controller Method of Malfunction Detection Detect the malfunction according to DIII-NET transmission data.
SiUS34-907 CHECK 1 Check for Causes of Rise in High Pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. Local pressure rise [In cooling] If the outdoor unit electronic expansion valve is throttled: (See *1.) Rise in high pressure Faulty high pressure control High pipe resistance Stop valve closed ←Check to be sure the stop valve is open. Bent or crashed pipe ←Conduct visual checks for pipe conditions.
SiUS34-907 CHECK 2 Check for Causes of Drop in Low Pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. [In cooling] (See *1.) Faulty low pressure control Abnormally low low-pressure (Low evaporating temperature) [In both cooling and heating] (See *2.) [In cooling] If the indoor unit electronic expansion valve is throttled too much: (See *3.
SiUS34-907 CHECK 3 Check for Fan Motor Connector (1) Turn the power supply off. (2) With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table.
SiUS34-907 CHECK 4 Power Transistor Check Perform the following procedures prior to check. (1) Power Off. (2) Remove all the wiring connected to the PCB where power transistors are mounted on. * Preparing a tester in the analog system is recommended. A tester in the digital system with diode check function will be usable.
SiUS34-907 [PCB and Circuit Diagram] J1 J2 J3 P1 DM P3 P1 N3 U V W P2 P3 IGBT X10A K2 L1 L2 L3 J1 J2 J3 N3 U V W X11A 214 Troubleshooting
SiUS34-907 CHECK 5 Check on connector of fan motor (Power supply wire) (1) Turn off the power supply. Measure the resistance between phases of U,V,W at the motor side connectors (three-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected. Red U White V Black W Measure the resistance values between phases U,V,W. CHECK 6 (1) Turn off the power supply.
SiUS34-907 CHECK 7 Check the Factors of Overheat Operation Identify the defective points referring to the Fault Tree Analysis (FTA) as follows. Hot gas circuit clogging Faulty hot gas bypass control (∗1) Defective solenoid valve coil Defective solenoid valve body ←Check if coil resistance and insulation are normal.
SiUS34-907 CHECK 8 Broken Wire Check of the Connecting Wires 1.
SiUS34-907 CHECK 9 Master Unit Central Connector Setting Table The master unit central setting connector (CN1/X1A) is mounted at the factory. • To independently use a single unit of the intelligent Touch Controller or a single unit of the centralized remote controller, do not dismount the master unit central setting connector (i.e., use the connector with the factory setting unchanged). • To independently use the schedule timer, insert an independent-use setting connector.
SiUS34-907 CHECK 10 Master-Slave Unit Setting Table Combination of intelligent Touch Controller and Centralized Remote Controller Master #1 Slave #2 * #3 #1 Pattern 1-00~4-15 N O CRC CRC intelligent Touch Controller P Q CRC #2 Master/ Slave Master Master #3 CRC — Master/ Slave Master — Master — — Master — — 5-00~8-15 #4 1-00~4-15 CRC CRC intelligent Touch Controller intelligent Touch Controller #4 Master/ Slave Slave Slave CRC — Master/ Slave Slave — Slave — — Slave — — 5
SiUS34-907 CHECK 11 Method of Replacing the Inverter’s Power Transistors Modules Checking failures in power semiconductors mounted on inverter PCB Check the power semiconductors mounted on the inverter PCB by the use of a multiple tester. h Multiple tester : Prepare the digital type of multiple tester with diode check function. h Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance.
SiUS34-907 Power module checking When using the digital type of multiple tester, make measurement in diode check mode. Tester terminal + - C+ U V Criterion Remark Not less than 0.3V (including ∞)* It may take time to determine the voltage due to capacitor charge or else. W U C- Not less than 0.3V (including ∞)* C+ 0.3 to 0.7V (including ∞)* U 0.3 to 0.7V (including ∞)* V W U V W C- V W *There needs to be none of each value variation.
SiUS34-907 Part 8 Appendix 1. Piping Diagrams......................................................................................223 1.1 Outdoor Unit ............................................................................................. 223 1.2 Indoor Unit................................................................................................ 224 2. Wiring Diagrams......................................................................................227 2.1 Outdoor Unit ...................
SiUS34-907 Piping Diagrams 1. Piping Diagrams 1.
Piping Diagrams 1.2 SiUS34-907 Indoor Unit FXFQ, FXHQ (4) (2) (3) (1) 4D024460D Code Name Code (1) Electronic expansion valve Y1E (2) Suction air temperature thermistor R1T (3) Liquid pipe temperature thermistor R2T (4) Gas pipe temperature thermistor R3T Main function Used for gas superheated degree control while in cooling operation or subcooled degree control while in heating operation. Used for thermostat control.
SiUS34-907 Piping Diagrams FXZQ 4D040157 Refrigerant pipe connection port diameters Model FXZQ07 / 09 / 12 / 18MVJU Gas φ1/2 (in) Liquid φ1/4 FXDQ 4D043864M Refrigerant pipe connection port diameters (in) Appendix Model FXDQ07 / 09 / 12 / 18MVJU Gas φ1/2 Liquid φ1/4 FXDQ24MVJU φ5/8 φ3/8 225
Piping Diagrams SiUS34-907 FXMQ, FXLQ, FXNQ 4D034245D Refrigerant pipe connection port diameters (in) Model FXMQ07 / 09 / 12 / 18PVJU FXLQ12 / 18MVJU FXNQ12 / 18MVJU FXMQ24 / 30PVJU FXLQ24MVJU FXNQ24MVJU 226 Gas Liquid φ1/2 φ1/4 φ5/8 φ3/8 Appendix
SiUS34-907 Wiring Diagrams 2. Wiring Diagrams 2.1 Outdoor Unit 2.1.
Wiring Diagrams 2.
SiUS34-907 2.
Wiring Diagrams SiUS34-907 3D059263 FXZQ07M / 09M / 12M / 18MVJU 230 Appendix
SiUS34-907 Wiring Diagrams 3D050501A FXDQ07M / 09M / 12M / 18M / 24MVJU Appendix 231
Wiring Diagrams SiUS34-907 3D065984A FXMQ07P / 09P / 12P / 18P / 24P / 30P / 36P / 48PVJU 232 Appendix
SiUS34-907 Wiring Diagrams 3D048116A FXHQ12M / 24M / 36MVJU Appendix 233
Wiring Diagrams SiUS34-907 3D046039D FXAQ07M / 09M / 12M / 18M / 24MVJU 234 Appendix
SiUS34-907 Wiring Diagrams 3D045644A FXLQ12M / 18M / 24MVJU FXNQ12M / 18M / 24MVJU Appendix 235
Option List SiUS34-907 3. Option List 3.1 Option List of Controllers Optional Accessories of Operation Control System No.
SiUS34-907 3.2 Option List Option List of Outdoor Unit RXYQM36 · 48MVJU Optional accessories Cool/Heat Selector Distributive Piping Fixing box REFNET header REFNET joint RXYMQ36MVJU, RXM48MVJU KRC19-26A KJB111A KHRP26M22H, KHRP26M33H (MAX. 4 branch) (MAX.
Option List 238 SiUS34-907 Appendix
Appendix Between indoor and indoor units Actual pipe length Difference in height The first refrigerant branching kit How to calculate the additional refrigerant to be charged Additional refrigerant to be charged R (lb.) R should be rounded off in units of 0.1lb. Enlarge Indoor unit Caution) In brazing connection in the size increase area in the piping, use a different-diameter joint for connection. (The different-diameter joint should be arranged in the local field.
Example of Connection 240
SiUS34-907 Thermistor Resistance / Temperature Characteristics 5.
Thermistor Resistance / Temperature Characteristics SiUS34-907 Outdoor Unit Thermistors for Discharge Pipe (R2T) T°F 32.0 33.8 35.6 37.4 39.2 41.0 42.8 44.6 46.4 48.2 50.0 51.8 53.6 55.4 57.2 59.0 60.8 62.6 64.4 66.2 68.0 69.8 71.6 73.4 75.2 77.0 78.8 80.6 82.4 84.2 86.0 86.0 87.8 89.6 91.4 93.2 95.0 96.8 98.6 100.4 102.2 104.0 105.8 107.6 109.4 111.2 113.0 114.8 116.6 118.4 120.
SiUS34-907 Pressure Sensor 6. Pressure Sensor Detected Pressure PH = 1.38VH-0.69 PL = 0.57VL-0.
SiUS34-907 Part 9 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) ............................................. 245 1.1 Outline ...................................................................................................... 245 1.2 Refrigerant Cylinders................................................................................ 247 1.3 Service Tools............................................................................................
SiUS34-907 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) 1.1 Outline 1.1.1 About Refrigerant R-410A Characteristics of new refrigerant, R-410A 1. Performance Almost the same performance as R-22 and R-407C 2. Pressure Working pressure is approx. 1.4 times more than R-22 and R-407C. 3. Refrigerant composition Few problems in composition control, since it is a Quasi-azeotropic mixture refrigerant.
Precautions for New Refrigerant (R-410A) SiUS34-907 Thermodynamic characteristic of R-410A Temperature (˚F) 246 Steam pressure (psi) Liquid Vapor -94 -90 -87 -83 -80 -76 -72 -69 -65 -62 5.24 5.92 6.68 7.50 8.41 9.41 10.50 11.69 12.98 14.39 5.24 5.92 6.67 7.50 8.40 9.40 10.49 11.67 12.96 14.36 -61 14.70 14.68 -58 -54 -51 -47 -44 -40 -36 -33 -29 -26 15.91 17.56 19.34 21.27 23.34 25.56 27.95 30.51 33.26 36.19 15.88 17.53 19.31 21.22 23.29 25.51 27.89 30.44 33.17 36.
SiUS34-907 1.2 Precautions for New Refrigerant (R-410A) Refrigerant Cylinders Cylinder specifications • The cylinder is painted refrigerant color (pink). • The cylinder valve is equipped with a siphon tube. Siphon tube Cylinder Refrigerant can be charged in liquid state with cylinder in upright position. Caution: Do not lay cylinder on its side during charging, since it cause refrigerant in gas state to enter the system.
Precautions for New Refrigerant (R-410A) 1.3 SiUS34-907 Service Tools R-410A is used under higher working pressure, compared to previous refrigerants (R-22, R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems. Therefore, gauge manifolds and charge hoses that are used with a previous refrigerant (R-22, R-407C) can not be used for products that use new refrigerants.
SiUS34-907 Precautions for New Refrigerant (R-410A) 1. Flaring tool Flare gauge Specifications • Dimension A Unit:in. Nominal size A +0−0.4 Tube O.D. Do Class-2 (R-410A) Class-1 (Conventional) 1/4 1/4 0.36 0.35 3/8 3/8 0.52 0.51 1/2 1/2 0.65 0.64 5/8 5/8 0.78 0.76 3/4 3/4 0.94 0.92 Differences • Change of dimension A Dimension A For class-1: R-407C For class-2: R-410A Conventional flaring tools can be used when the work process is changed.
Precautions for New Refrigerant (R-410A) SiUS34-907 2. Torque wrench Specifications • Dimension B Unit:in. Nominal size 1/2 Class-1 0.94 Class-2 1.02 Previous 0.94 5/8 1.06 1.14 1.06 No change in tightening torque No change in pipes of other sizes Differences • Change of dimension B Only 1/2", 5/8" are extended For class-1: R-407C For class-2: R-410A Dimension B 3.
SiUS34-907 Precautions for New Refrigerant (R-410A) 4. Leak tester Specifications • Hydrogen detecting type, etc. • Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc. Differences • Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen. 5. Refrigerant oil (Air cCompal) Specifications • Contains synthetic oil, therefore it can be used for piping work of every refrigerant cycle.
Precautions for New Refrigerant (R-410A) SiUS34-907 • Low pressure gauge – 14.5 to 551 psi (– 76 cmHg to 38 kg/cm2) • 1/4" → 5/16" (2min → 2.5min) • No oil is used in pressure test of gauges. → For prevention of contamination • Temperature scale indicates the relationship between pressure and temperature in gas saturated state. Differences • Change in pressure • Change in service port diameter 7. Charge hose for R-410A (Hose with ball valve) • • • Specifications Working pressure 737 psi (51.
SiUS34-907 Precautions for New Refrigerant (R-410A) 9. Weigher for refrigerant charge Specifications • High accuracy TA101A (for 10-kg cylinder) = ± 2g TA101B (for 20-kg cylinder) = ± 5g • Equipped with pressure-resistant sight glass to check liquid refrigerant charging. • A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories. Differences • Measurement is based on weight to prevent change of mixing ratio during charging. 10.
Precautions for New Refrigerant (R-410A) 254 SiUS34-907 Precautions for New Refrigerant (R-410A)
Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a particular country. Prior to purchase, please therefore confirm with your local authorized importer, distributor and/or retailer whether this product conforms tot he applicable standards, and is suitable for use, in the region where the product will be used.
