Order No: PHAAM1111085C1 Indoor Unit CS-S9NKUA CS-S12NKUA Outdoor Unit CU-S9NKUA CU-S12NKUA WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians.
12.1 Restart Control (Time Delay Safety Control).. ....................................................................31 12.2 30 Seconds Forced Operation ...................31 12.3 Total Running Current Control ...................31 12.4 IPM (Power Transistor) Prevention Control31 12.5 Low Pressure Protection Control (Gas Leakage Detection) ....................................32 12.6 Low Frequency Protection Control 1 ..........32 12.7 Low Frequency Protection Control 2 ..........32 12.
1. Safety Precautions • • Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing. Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed. The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as below.
WARNING 19. 20. 21. During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.). During pump down operation, stop the compressor before remove the refrigeration piping.
2. Specification Model Indoor CS-S9NKUA CS-S12NKUA Outdoor CU-S9NKUA CU-S12NKUA ARI ARI Performance Test Condition Phase, Hz Power Supply Capacity Cooling Single, 60 V Single, 60 208 230 208 230 Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. kW 1.20 2.49 3.00 1.20 2.49 3.00 1.20 3.51 3.90 1.20 3.51 3.90 BTU/h 4100 8500 10200 4100 8500 10200 4100 12000 13300 4100 12000 13300 Running Current A - 3.5 - - 3.1 - - 5.2 - - 4.
Refrigeration Cycle Dimension Piping Weight Control Device Capillary Tube Capillary Tube Refrigerant Oil cm FV50S (320) FV50S (320) Refrigerant Type g (oz) R410A, 980 (34.6) R410A, 980 (34.
3. Location of Controls and Components 3.1 Indoor Unit 3.2 Outdoor Unit 3.
4. Dimensions 4.
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5. Refrigeration Cycle Diagram INDOOR OUTDOOR LIQUID SIDE PIPE TEMP. SENSOR EXP. PROCESSTUBE DISCHARGE VALVE STRAINER MUFFLER 2-WAY VALVE INTAKE TEMP. SENSOR HEAT EXCHANGER (EVAPORATOR) F.COND GAS SIDE 4-WAY VALVE 4-WAY VALVE DISCHARGE MUFFLER ACCUMULATOR COMP.
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7. Wiring Connection Diagram 7.
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8. Electronic Circuit Diagram 8.
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9. Printed Circuit Board 9.1 9.1.
9.1.2 Power Printed Circuit Board 9.1.
9.2 9.2.
10. Installation Instruction 10.1 S9NKUA S12NKUA 10.1.1 10.1.1.1 • • • • • • • • • • • • • 10.1.2 Indoor Unit Do not install the unit in excessive oil fume area such as kitchen, workshop and etc. There should not be any heat source or steam near the unit. There should not be any obstacles blocking the air circulation. A place where air circulation in the room is good. A place where drainage can be easily done. A place where noise prevention is taken into consideration.
10.1.3 Indoor Unit 10.1.3.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent if from the vibration. The centre of installation plate should be at more than c at right and left of the wall. The distance from installation plate edge to ceiling should more than d. From installation plate left edge to unit’s left side is e. From installation plate right edge to unit’s right side is f.
10.1.3.3 Indoor Unit Installation 10.1.3.4 For the right rear piping 10.1.3.5 For the right bottom piping 10.1.3.6 For the embedded piping (This can be used for left rear piping and bottom piping also.
10.1.3.7 Connect the Cable to the Indoor Unit 1. The inside and outside connection cable can be connected without removing the front grille. 2. Unscrew the conduit cover and fix the conduit connector to conduit cover with lock nut, then secure it against chassis. 3. Connection cable between indoor unit and outdoor unit should be UL listed or CSA approved 4 conductor wires minimum AWG16 in accordance with local electric codes.
10.1.3.8 10.1.3.9 1 2 3 Wire Stripping and connecting requirement Cutting and flaring the piping Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. Please make flare after inserting the flare nut onto the copper pipes.
10.1.4 Outdoor Unit 10.1.4.1 • Install the Outdoor Unit After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram. 1 Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø13/32”). 2 When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails. Model S9NKUA, S12NKUA 10.1.4.2 10.1.4.2.
10.1.4.3 Evacuation of the equipment WHEN INSTALLATION AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedures. 1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve. 2. Connect the micron gauge between vacuum pump and service port of outdoor units. 3. Turn on the power switch of the vacuum pump and make sure that connect digital micron gauge and to pull down to a value of 500 microns. 4.
9. Secure the wire onto the control board with the holder (clamper). 10. After completing wiring connections, reattach the control board cover (Metal and Resin) and the top panel to the original position with the screws. 11. For wire stripping and connection requirement, refer to instruction g of indoor unit. o 10.1.4.5 Earth lead wire shall be Yellow/Green (Y/G) in colour and shall be longer than other lead wires as shown in the figure for electrical safety in case of the slipping.
11. Operation Control 11.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.
11.2 Indoor Fan Motor Operation 11.2.1 • • Basic Rotation Speed Manual Fan Speed o Fan motor’s number of rotation is determined according to remote control setting. Remote control ○ ○ ○ ○ ○ Tab Hi Me+ Me Me- Lo Auto Fan Speed o According to room temperature and setting temperature, indoor fan speed is determined automatically. o The indoor fan will operate according to pattern below.
11.4.1 Vertical Airflow Operation Mode Airflow Direction Auto Manual Auto Manual Cooling Soft Dry • • Vane Angle (°) 3 4 20 ~ 45 26 32 37 20 ~ 45 26 32 37 1 2 20 20 5 45 45 Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated above. It does not swing during fan motor stop. When the air conditioner is stopped using remote control, the vane will shift to close position.
11.6 Powerful Mode Operation • • When the powerful mode is selected, the internal setting temperature will shift lower up to 35.6°F (for Cooling/Soft Dry) than remote control setting temperature for 20 minutes and the fan speed will increase to achieve the setting temperature quickly. Powerful operation stops condition o When one of the following condition is satisfied, powerful operation stops: Quiet button is pressed. Stop by OFF/ON button. OFF Timer activates. Powerful button is pressed again.
12. Protection Control 12.1 • • • The compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by pressing OFF/ON button at remote control within this period. This control is not applicable if the power supply is cut off and on again. This phenomenon is to balance the pressure inside the refrigerant cycle. 12.2 • • • • Model S9*** S12*** Operation Mode X (A) X (A) Cooling / Soft Dry (A) 3.89 6.55 Cooling / Soft Dry (B) 3.28 6.
12.5 • • Control start conditions o For 5 minutes, the compressor continously operates and outdoor total current is between 0.64A and 0.85A o During Cooling and Soft Dry operation: Indoor suction temperature – indoor piping temperature is below 39.2°F Control contents o Compressor stops (and restart after 3 minutes). o If the conditions above happened 2 times within 20 minutes, the unit will: Stop operation Timer LED blinks and “F91” indicated. 12.
12.10 Freeze Prevention Control • • • • When indoor heat exchanger temperature is lower than 32°F continuously for 6 minutes, compressor will stops operation. Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 55.4°F. At the same time, indoor fan speed will be higher than during its normal operation. If the indoor heat exchanger temperature is higher than 55.4°F for 5 minutes, the fan speed will return to its normal operation. 12.
13. Servicing Mode 13.1 Auto Off/On Button Auto OFF/ON Button Pressed Auto OFF/ON Button Pressed 5 sec Auto Operation Test Run Operation (Forced Cooling Operation) Stop 1 AUTO OPERATION MODE The Auto Operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be used to operate air conditioner with limited function if remote control is misplaced or malfunction.
13.2 Remote Control Button 13.2.1 • To check remote control transmission code and store the transmission code to EEPROM o Press “Set” button continuously for 10 seconds by using pointer o Press “Timer Set” button unit a “beep” sound is heard as confirmation of transmission code change. 13.2.2 • TIMER ▲ To change indoor unit indicators’ intensity: o Press continuously for 5 seconds. 13.2.5 • RESET (AC) To restore the unit’s setting to factory default. o Press once to restore the unit’s setting 13.2.
14. Troubleshooting Guide 14.1 Refrigeration Cycle System In order to diagnose malfunctions, ensure the air conditioner is free from electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan. The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table to the right.
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14.2 Breakdown Self Diagnosis Function 14.2.1 • • • Self Diagnosis Function (Three Digits Alphanumeric Code) Once error occurred during operation, the unit will stop its operation, and Timer LED blinks. Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will ON again. In operation after breakdown repair, the Timer LED will not blink. The last error code (abnormality) will be stored in IC memory. 14.2.2 1 2 3 4 5 6 7 8 14.2.
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14.4 Troubleshooting Flowchart 14.4.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions • During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused • Faulty indoor unit PCB. • Faulty outdoor unit PCB. • Indoor unit-outdoor unit signal transmission error due to wrong wiring.
14.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) Malfunction Decision Conditions • During startup, error code appears when different types of indoor and outdoor units are interconnected. Malfunction Caused • Wrong models interconnected. • Wrong indoor unit or outdoor unit PCBs mounted. • Indoor unit or outdoor unit PCBs defective. • Indoor-outdoor unit signal transmission error due to wrong wiring.
14.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors. Malfunction Caused • Faulty connector connection. • Faulty sensor. • Faulty PCB.
14.4.4 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors. Malfunction Caused • Faulty connector connection. • Faulty sensor. • Faulty PCB.
14.4.5 H16 (Outdoor Current Transformer Open Circuit) Malfunction Decision Conditions • A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (less than 1.14A) for continuously 20 seconds.
14.4.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions • The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm) Malfunction Caused • Operation stops due to short circuit inside the fan motor winding. • Operation stops due to breaking of wire inside the fan motor. • Operation stops due to breaking of fan motor lead wires. • Operation stops due to Hall IC malfunction.
14.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused • Faulty connector connection. • Faulty sensor. • Faulty PCB.
14.4.8 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors. Malfunction Caused • Faulty connector connection. • Faulty sensor. • Faulty PCB.
14.4.9 H28 (Outdoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors. Malfunction Caused • Faulty connector connection. • Faulty sensor. • Faulty PCB.
14.4.10 H30 (Compressor Discharge Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors. Malfunction Caused • Faulty connector connection. • Faulty sensor. • Faulty PCB.
14.4.11 H33 (Unspecified Voltage between Indoor and Outdoor) Malfunction Decision Conditions • The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused • Wrong models interconnected. • Wrong indoor unit and outdoor unit PCBs used. • Indoor unit or outdoor unit PCB defective.
14.4.12 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions • The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor. Malfunction Caused • Operation stops due to short circuit inside the fan motor winding. • Operation stops due to breaking of wire inside the fan motor. • Operation stops due to breaking of fan motor lead wires. • Operation stops due to Hall IC malfunction. • Operation error due to faulty outdoor unit PCB.
14.4.13 H98 (Indoor High Pressure Protection) Error Code will not display (no Timer LED blinking) but store in EEPROM Malfunction Decision Conditions • During heating operation, the temperature detected by the indoor pipe temperature sensor is above 140°F.
14.4.14 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Malfunction Decision Conditions • Freeze prevention control takes place (when indoor pipe temperature is lower than 35.
14.4.15 F11 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions • When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above 113°F. Malfunction Caused • Faulty connector connection. • Faulty indoor pipe temperature sensor. • Faulty indoor main PCB.
14.4.16 F90 (Power Factor Correction Protection) Malfunction Decision Conditions • During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit main PCB senses abnormal high DC voltage level. Malfunction Caused • DC voltage peak due to power supply surge. • DC voltage peak due to compressor windings not uniform. • Faulty outdoor PCB.
14.4.17 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions • During cooling, compressor frequency = Fcmax. • During cooling and heating operation, running current: 0.65A < I < 1.65A. • During cooling, indoor intake - indoor pipe < 39.2°F. Malfunction Caused • Refrigerant shortage (refrigerant leakage) • Poor compression performance of compressor. • 2/3 way valve closed. • Detection error due to faulty indoor intake air or indoor pipe temperature sensors.
14.4.18 F93 (Compressor Rotation Failure) Malfunction Decision Conditions A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit.
14.4.19 F95 (Cooling High Pressure Abnormality) Malfunction Decision Conditions During operation of cooling, when outdoor unit heat exchanger high temperature data (141.8°F) is detected by the outdoor pipe temperature sensor. Malfunction Caused • Outdoor pipe temperature rise due to short circuit of hot discharge air flow. • Outdoor pipe temperature rise due to defective of outdoor fan motor. • Outdoor pipe temperature rise due to defective outdoor pipe temperature sensor.
14.4.20 F96 (IPM Overheating) Malfunction Decision Conditions During operating of cooling and heating, when IPM temperature data (212°F) is detected by the IPM temperature sensor. Malfunction Caused • IPM overheats due to short circuit of hot discharge air flow. • IPM overheats due to defective of outdoor fan motor. • IPM overheats due to defective of internal circuitry of IPM. • IPM overheats due to defective IPM temperature sensor.
14.4.21 F97 (Compressor Overheating) Malfunction Decision Conditions During operation of cooling and heating, when compressor tank temperature data (233.6°F) is detected by the compressor tank temperature sensor. Malfunction Caused • Refrigerant shortage (refrigerant leakage). • 2/3 way valve closed. • Detection error due to faulty compressor tank temperature sensor.
14.4.22 F98 (Input Over Current Detection) Malfunction Decision Conditions During cooling and heating operation, when an input over-current (16.8A) is detected by checking the input current value being detected by current transformer (CT) with the compressor running. Malfunction Caused • Over-current due to compressor failure. • Over-current due to defective outdoor unit PCB. • Over-current due to defective inverter main circuit electrolytic capacitor. • Over-current due to excessive refrigerant.
14.4.23 F99 (Output Over Current Detection) Malfunction Decision Conditions During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that flows in the inverter DC peak sensing circuitry. Malfunction Caused • DC peak due to compressor failure. • DC peak due to defective power transistor(s). • DC peak due to defective outdoor unit PCB.
15. Disassembly and Assembly Instructions WARNING High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 15.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.1.1 15.1.1.
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15.1.1.3 To remove control board 15.1.1.
16. Technical Data 16.1 Operation Characteristics 16.1.1 • CS-S9NKUA CU-S9NKUA Cooling Characteristic o Room temperature: o Operation condition: o Piping length: o Compressor Freq: 81°F (DBT), 66°F (WBT) High fan speed 24.
• Piping Length Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Outdoor temperature: 95°F (DBT) o Compressor Freq: Fc 68
16.1.2 • CS-S12NKUA CU-S12NKUA Cooling Characteristic o Room temperature: o Operation condition: o Piping length: o Compressor Freq: 81°F (DBT), 66°F (WBT) High fan speed 24.
• Piping Length Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Outdoor temperature: 95°F (DBT) o Compressor Freq: Fc 70
17. Exploded View and Replacement Parts List 17.1 Indoor Unit 17.1.1 CS-S9NKUA CS-S12NKUA Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
REF. NO. PART NAME & DESCRIPTION QTY.
17.2 Outdoor Unit 17.2.1 CU-S9NKUA CU-S12NKUA Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
REF. NO. PART NAME & DESCRIPTION QTY.
