SPLIT TYPE ROOM AIR CONDITIONER CASSETTE type INVERTER SERVICE INSTRUCTION Models R410A Indoor unit Outdoor unit AUU9RLF AUU12RLF AUU18RLF AOU9RLFC AOU12RLFC AOU18RLFC
CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. COOLING OPERATION................................................................................................ 2. HEATING OPERATION................................................................................................. 3. DRY OPERATION......................................................................................................... 4. AUTO CHANGEOVER OPERATION............................................................................
2. TROUBLE SHOOTING 2-1 ERROR DISPLAY....................................................................................................... 02-01 2-1-1 WIRED REMOTE CONTROLLER DISPLAY...................................................... 02-01 2-2 TROUBLE SHOOTING WITH ERROR CODE............................................................ 02-03 2-3 TROUBLE SHOOTING WITH NO ERROR CODE..................................................... 02-25 2-4 SERVICE PARTS INFORMATION....................................
R410A CASSETTE type INVERTER 1 .
1. COOLING OPERATION A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is 4°F(2°C) higher than a set temperature, the compressor operation frequency will attain to maximum performance. * If the room temperature is 5°F(2.5°C) lower than a set temperature, the compressor will be stopped.
2. HEATING OPERATION A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is lower by 6°F(3°C) than a set temperature, the compressor operation frequency will attain to maximum performance. * If the room temperature is higher 5°F(2.5°C) than a set temperature, the compressor will be stopped.
4. AUTO CHANGEOVER OPERATION When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 64°F(18°C) and 88°F(30°C) in 2°F(1°C) steps. ( Fig. 3 : Operation flow chart ) START YES Room temp. >Ts+4°F(2°C) ? NO NO TS : Setting temperature Room temp.
5. INDOOR FAN CONTROL 1. Fan speed ( Table 5 : Indoor fan speed ) Speed (rpm) Operation mode Heating Cooling/ Fan Air flow mode AUU9RLF High Med+ Med Low Quiet Cool air prevention S-Low High Med Low Quiet S-Low Dry AUU12RLF AUU18RLF 590 570 540 490 440 400 300 650 620 580 520 460 400 300 830 770 730 630 500 400 300 590 540 490 440 300 660 580 520 460 300 730 630 540 460 300 X zone: 440 J zone: 440 X zone: 460 J zone: 460 X zone: 460 J zone: 460 2.
5. HEATING OPERATION Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig. 5 On the other hand, if switched in [High] [Quiet], the indoor motor will run at a constant airflow of [Heat] operation modes Quiet, Low, Med, High, as shown in Table 5. ( Fig.
6. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor Following table shows the type of the outdoor fan motor. The control method is different between AC motor and DC motor. ( Table 7 : Type of Motor ) AC Motor DC Motor AOU9 / 12 / 18RLFC 2.
7. LOUVER CONTROL 1. VERTICAL LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follows: 1 2 3 4 (Operation Range) During Cooling / Heating / Dry / Fan mode : 1 2 3 1 4 2 3 Use the air direction adjustments within the ranges shown above. 4 The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
8. COMPRESSOR CONTROL 1. OPEARTION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in the Table 10. (Table 10 : Compressor frequency range) Cooling / Dry Heating Minimum Maximum Minimum Maximum 10rps 10rps 12rps 74rps 74rps 104rps 10rps 10rps 16rps 119rps 119rps 140rps AOU9RLFC AOU12RLFC AOU18RLFC 2. OPEARTION FREQUENCY CONTROL AT NORMAL START UP The compressor frequency soon after the start-up is controlled as shown in the Fig. 9 (Fig.
9. TIMER OPEARTION CONTROL 9-1 WIRELESS REMOTE CONTROLLER (OPTION) The Table 12 shows the available timer setting based on the product model. ( Table 12 : Timer Setting ) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER AUU9/ 12/ 18RLF 1. ON TIMER/ OFF TIMER OFF timer : When the clock reaches the set time, the air conditioner will be turned off. Operation mode Stop mode Set time of timer ON timer : When the clock reaches the set time, the air conditioner will be turned on.
3. SLEEP TIMER If the sleep is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time ON. In the cooling operation mode When the sleep timer is set, the setting temperature is increased 2°F(1°C). It increases the setting temperature another 2°F(1°C) after 1 hour.
9-2 WIRED REMOTE CONTROLLER The Table 13 shows the available timer setting based on the product model. ( Table 13 : Timer Setting ) ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER AUU9/ 12/ 18RLF 1. ON / OFF TIMER OFF timer : When the clock reaches the set time, the air conditioner will be turned off. Operation mode Stop mode Set time of timer ON timer : When the clock reaches the set time, the air conditioner will be turned on. Operation mode Stop mode Set time of timer 2.
2-2. DAY OFF setting The DAY OFF setting is only available for days for which weekly settings already exist. If the operating time carries over to the next day (during a next day setting), the effective DAY OFF range will be set as shown below.
10. ELECTRONIC EXPANSION VALVE CONTROL The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the Table 14. The compressor frequency, the detected temperature by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.
14. AUTO RESTART When the power was interrupted by a power failure, etc. during operation, the operation contents at that time are memorized and when power is recovered, operation is automatically started with the memorized operation contents.
18. ECONOMY OPERATION The ECONOMY operation functions by pressing ECONOMY button on the remote controller. At the maximum output, ECONOMY Operation is approximately 70% of normal air conditioner operation for cooling and heating. The ECONOMY operation is almost the same operation as below settings. ( Table 18 ) Mode Target temperature Cooling/ Dry Heating Setting temp.+2°F(+1°C) Setting temp.-2°F(-1°C) 19.
. DRAIN PUMP OPERATION During Cooling / Dry mode 1. When the compressor starts, the drain pump starts simultaneously. 2. The drain pump operates continuously for 3 minutes after the compressor is turned off. 3. When the compressor stops by the "Anti- freezing protection", the drain pump is turned off in 1 hour after the compressor stops. 4. When the water level in the drain pan rises up and then the float switch functions: 1 The compressor, indoor and outdoor fan motor operation are stopped.
. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 19. (Table 19 : Condition of starting Defrost Operation) Compressor integrating operation time Normal defrost Less than 25 minutes (9/ 12RLFC) Less than 40 minutes (18RLFC) More than 25 minutes (9/ 12RLFC) More than 40 minutes (18RLFC) Outdoor heat exchanger temp. < = 1.4°F(-17°C) (at outside air temp. > 14°F(-10°C)) = Outdoor heat exchanger temp. < = Outside air temp.
3. Defrost Flow Chart The defrosting shall proceed by the integrating operation time, outdoor temperature and outdoor heat exchanger temperature as follows. Heating operation start : Compressor ON (Not defrosted for 10 minutes) Integrating defrost Normal defrost Outside air temp. > = -12.6°F(7°C) Outdoor HEX temp. < 1.4°F(-17°C) = -4°F (-20°C)< = Outside air temp. < 14°F (-10°C) Outdoor HEX temp. < = Outside air temp. -(12.6°F (7°C)) or Outdoor HEX temp. < -13°F (-25°C) = Outside air temp.
22. OFF DEFROST OPEARTION CONTROL When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost, and then stop. 1. OFF DEFROST OPERATION CONDITION In heating operation, the outdoor heat exchanger temperature is less than 24.
23. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENTION CONTROL The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 20rps, and it continues to decrease the frequency for 20rps every 120 seconds until the temperature becomes lower than Temperature .
3. ANTIFREEZING CONTROL (Cooling and Dry mode) The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger temperature sensor detects the temperature lower than Temperature . Then, the anti-freezing control is released when it becomes higher than Temperature . (Table 23 : Anti-freezing Protection Operation / Release Temperature) Outdoor temperature Over than 50°F(10°C) *1 or 54°F(12°C) *2 Less than 50°F(10°C) *1 or 54°F(12°C) *2 Temperature Temperature 44.6°F (7°C) 55.
R410A CASSETTE type INVERTER 2 .
2-1 ERROR DISPLAY 2-1-1 WIRED REMOTE CONTROLLER DISPLAY 1. SELF - DIAGNOSIS When "Er" in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authorized service personnel. Unit number (usually 0) Error code SU MO TU WE TH FR SA ex.
1. SELF - DIAGNOSIS When " Er " in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authorized service personnel. Unit number (usually 0) Error code SU MOTU WETH FR SA ex. Self-diagnosis check 2. ERROR CODE HISTORY DISPLAY Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller. 1. Stop the air conditioner operation. 2. Press the SET TEMPERATURE buttons or more to start the self-diagnosis.
2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1-1 OUTDOOR UNIT Error Method: Serial communication error (Serial Reverse Transfer Error) Detective Actuators: Outdoor unit Main PCB Outdoor unit fan motor Indicate or Display: Refer to error code table. Detective details: When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON, or the indoor unit cannot receive the serial signal more than 15seconds during normal operation. Forecast of Cause: 1.
Trouble shooting 1-2 INDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Serial communication error (Serial Forward Transfer Error) Detective details: Detective Actuators: When the outdoor unit cannot receive the serial signal from Indoor unit more than 10seconds. Indoor unit Controller PCB Indoor unit Fan motor Forecast of Cause: 1. Connection failure 2. External cause Check Point 1-1 : Reset the power and operate 3. Controller PCB failure 4.
Trouble shooting 2 INDOOR UNIT Error Method: Wired remote controller communication error Detective Actuators: Indoor unit Controller PCB Wired remote control Indicate or Display: Refer to error code table. Detective details: When the indoor unit cannot receive the signal from Wired Remote Control more than 1minute during normal operation. Forecast of Cause: 1. Terminal connection abnormal 2. Wired remote control failure 3.
Trouble shooting 3 INDOOR UNIT Error Method: Indicate or Display: Indoor unit model information error EEPROM access abnormal Refer to error code table. Detective details: Detective Actuators: Indoor unit Controller PCB When power is on and there is some below case. 1. When model information of EEPROM is incorrect. 2. When the access to EEPROM failed. Forecast of Cause: 1. External cause 2. Defective connection of electric components Check Point 1-1 : Reset Power Supply and operate 3.
Trouble shooting 4 INDOOR UNIT Error Method: INDOOR UNIT Manual auto switch error Indicate or Display: Refer to error code table. Detective details: Detective Actuators: When the Manual Auto Switch becomes ON for consecutive 60 or more seconds. Indoor unit Controller PCB Indicator PCB Manual auto switch Forecast of Cause : 1. Manual auto switch failure 2.Controller PCB and Indicator PCB failure Check Point 1 : Check the Manual auto switch Check if Manual auto switch is kept pressed.
Indicate or Display: Trouble shooting 5 INDOOR UNIT UNIT Error Method: Refer to error code table. Indoor room thermistor error Detective details: Detective Actuators: Indoor unit Controller PCB Room temperature thermistor When Room Temperature Thermistor open or short-circuit is detected. Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure Check Point 1 : Check connection of Connector Check if connector is removed. Check erroneous connection.
Trouble shooting 6 INDOOR UNIT Error Method: INDOOR UNIT Indoor heat Ex.(Pipe) thermistor error Indicate or Display: Detective Actuators: Detective details: Refer to error code table. When Heat Ex. Temperature Thermistor open or short-circuit is detected. Indoor unit Controller PCB Heat Ex. temperature thermistor Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure Check Point 1 : Check connection of Connector Check if connector is removed.
Trouble shooting 7 INDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Indoor unit fan motor error Detective Actuators: Detective details: Indoor unit Controller PCB Indoor unit Fan motor When the condition that actual frequency of Indoor Fan is below 1/3 of target frequency is continued more than 56 seconds. Forecast of Cause: 1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise 4. Control PCB failure 5.
Trouble shooting 8 INDOOR UNIT Error Method: Drain pump error Detective Actuators: Indoor unit Controller PCB Float switch Forecast of Cause : 1. Float switch failure 4. Drain pump failure Indicate or Display: Refer to error code table. Detective details: When Float switch is ON for more than 3 minutes. 2. Shorted connector/wire 5. Hose clogging 3. Controller PCB failure Check Point 1 : Check Float switch Check operation of float switch. (any blocking by dust, etc.
Trouble shooting 9 OUTDOOR UNIT Error Method: Outdoor unit main PCB error Detective Actuators: Outdoor unit Main PCB Indicate or Display: Refer to error code table. Detective details: Access to EEPROM failed due to some cause after outdoor unit started. Forecast of Cause: 1. External cause (Noise, temporary open, voltage drop) Check Point 1-1 : Reset Power Supply and operate 2.
For AOU9 / 12RLFC Trouble shooting 10-1 OUTDOOR UNIT Error Method: INDOOR UNIT Indicate or Display: Refer to error code table. PFC circuit error Detective Actuators: Detective details: When inverter output DC voltage is higher than 415V for over 3 seconds, the compressor stops. If the same operation is repeated 5 times, the compressor stops permanently. Outdoor unit Main PCB Forecast of Cause : 1. External cause 2. Connector connection failure 3.
For AOU18RLFC Trouble shooting 10-2 OUTDOOR UNIT Error Method: INDOOR UNIT Indicate or Display: Refer to error code table. Active filter error Detective Actuators: Detective details: Outdoor unit Main PCB Active filter module When inverter input DC voltage is higher than 425V or lower than 80V. When a momentary power cut off occurred on low voltage Forecast of Cause : 1. External cause 2. Connector connection failure 3. Main PCB failure 4.
Trouble shooting 11 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. IPM error Detective Actuators: Outdoor unit Main PCB Outdoor unit Transistor PCB (18RLFC) Compressor Detective details: When more than normal operating current to IPM in Main PCB flows, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently. Forecast of Cause : 1.
Trouble shooting 12 OUTDOOR UNIT Error Method: INDOOR UNIT Indicate or Display: Refer to error code table. Discharge thermistor error Detective details: Detective Actuators: When Discharge pipe temperature thermistor open or short-circuit is detected at power ON or while running the compressor. Outdoor unit Main PCB Discharge pipe temperature thermistor Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3.
Trouble shooting 13 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Heat Ex.(Pipe) thermistor error Detective details: Detective Actuators: Outdoor unit Main PCB Heat exchanger thermistor When Heat exchanger temperature thermistor open or short-circuit is detected at power ON or while running the compressor. Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3.
Trouble shooting 14 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Outdoor thermistor error Detective details: Detective Actuators: Outdoor unit Main PCB Outdoor thermistor When Outdoor temperature thermistor open or short-circuit is detected at power ON or while running the compressor. Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3. Main PCB failure Check Point 1 : Check connection of Connector Check if connector is removed.
Trouble shooting 15 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Current sensor error Detective details: Detective Actuators: Outdoor unit Main PCB When Input Current Sensor has detected 0A, while Inverter Compressor is operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1. Defective connection of electric components Check Point 1-1 : Reset Power Supply and operate 2. External cause 3.
Trouble shooting 16 OUTDOOR UNIT Error Method: Over current error Detective Actuators: Outdoor unit Main PCB Compressor Indicate or Display: Refer to error code table. Detective details: "Protection stop by overcurrent generation after inverter compressor start processing completed'' generated consecutively 10 times. * The number of generations is reset if the start-up of the compressor succeeds. Forecast of Cause : 1.
Trouble shooting 17 OUTDOOR UNIT Error Method: Compressor control error Detective Actuators: Outdoor unit Main PCB Compressor Indicate or Display: Refer to error code table. Detective details: If the detected rotor location is out of phase with actual rotor location more than 90°, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently. Forecast of Cause : 1.
Trouble shooting 18 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Outdoor unit fan motor error Detective details: Detective Actuators: When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts, fan motor stops. After fan motor restarts, if the same operation within 60sec is repeated 3 times in a row, compressor and fan motor stops. If and repeats 5 times in a row, compressor and fan motor stops permanently.
Trouble shooting 19 OUTDOOR UNIT Error Method: 4-way valve error Detective Actuators: Indoor unit Controller PCB Heat Ex. temperature thermistor Room temperature thermistor 4-way valve Main PCB Indicate or Display: Refer to error code table. Detective details: When the indoor heat exchanger temperature is compared with the room temperature, and either following condition is detected continuously two times, the compressor stops. Cooling or Dry operation [Indoor heat exchanger temp.] - [Room temp.
Trouble shooting 20 OUTDOOR UNIT Error Method: INDOOR UNIT Discharge temperature error Indicate or Display: Detective Actuators: Detective details: Refer to error code table. Outdoor unit Main PCB Discharge temperature thermistor Forecast of Cause : "Protection stop by "discharge temperature 230°F(110°C) during compressor operation"" generated 2 times within 24 hours. 1. 3-way valve not opened 2. EEV defective, strainer clogged 3. Outdoor unit operation failure, foreign matter on heat exchanger 4.
2-3 TROUBLE SHOOTING WITH NO ERROR CODE Trouble shooting 21 Forecast of Cause: Indoor Unit - No Power 1. Power supply failure 2. External cause 3. Electrical components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable. >>If abnormal condition is found, correct it by referring to Installation Manual or Data & Technical Manual.
Trouble shooting 22 Forecast of Cause: Outdoor Unit - No Power 1. Power supply failure 2. External cause 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable. >>If abnormal condition is found, correct it by referring to Installation Manual or Data & Technical Manual.
Trouble shooting 23 Forecast of Cause: No Operation (Power is ON) 1. Setting/ Connection failure 2. External cause 3. Electrical component defective Check Point 1 : Check indoor and outdoor installation condition Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control. Or, check if there is an open cable connection.
Trouble shooting 24 Forecast of Cause: No Cooling / No Heating 1. Indoor Unit error 2. Outdoor Unit error 3. Effect by surrounding environment 4. Connection pipe / Connection wire failure 5. Refrigeration cycle failure Check Point 1 : Check Indoor unit Does Indoor unit Fan run on High fan? Is Air filter dirty? Is Heat exchanger clogged? Check if Energy save function is operated.
Trouble shooting 25 Abnormal Noise Forecast of Cause : 1. Abnormal installation (Indoor/ Outdoor) 2. Fan failure (Indoor/ Outdoor) 3. Compressor failure (Outdoor) Diagnosis method when abnormal noise is occurred Abnormal noise is coming from Indoor unit. (Check and correct followings) Abnormal noise is coming from Outdoor unit.
2-4 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting ) Does not start up Is there open or loose connection cable? Check Main PCB, connection of Compressor, and winding resistance. (Refer to the next page).
SERVICE PARTS INFORMATION 2 Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) Terminal cover opened C (BLACK) S R (WHITE) (RED) AOU9/ 12/ 18RLFC Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor. C AOU9 / 12RLFC Resistance Value : 1.4 at 77°F(25°C) R S AOU18RLFC Resistance Value : 0.
SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector (CN40 or CN700) ( Loose connector or open cable ) CN40 [9/12RLFC] 1 1 CN700 [18RLFC] RED 2 2 BLUE ORANGE 3 3 YELLOW 4 4 WHITE EXPANSION VALVE COIL EV 55 Check Point 3 : Check Voltage from Main PCB. Check Point 2 : Check Coil of EEV Remove connector, check each winding resistance of Coil. Read wire Orange - Red DC If it does not appear, replace Main PCB.
SERVICE PARTS INFORMATION 4 Indoor unit fan motor Check Point 1 : Check rotation of Fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) >>If Fan or Bearing is abnormal, replace it. Check Point 2 : Check resistance of Indoor Fan Motor Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Earth terminal) >>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.
For AOU18RLFC SERVICE PARTS INFORMATION 6 Active filter module Check Point 1 : Check Open or Short-circuit and Diode (D1) Remove connector, check the open or short-circuit and the diode in the module L1 +IN -IN Check the open or short-circuit L2 Terminal P Tester(+) N ※ ※ Resistance value Tester(-) (+IN) ( IN) ( IN) N P (+IN) L1 L2 P N L1,L2 Control Box L2 N + - 20% 360k 0 + - 20% 720k 1.40M (Ref. value 1) / 2.28M (Ref. value 2) + - 20% 360k 1.69M (Ref. value 1) / 1.
For AOU18RLFC SERVICE PARTS INFORMATION 7 IPM (Mounted on Transistor PCB) Check Point 1 Disconnect the connection wires between the Transistor PCB - Capacitor PCB and Transistor PCB - Inverter Compressor. Set the tester to the "Resistance" mode, and measure the resistance between the following terminals.
R410A CASSETTE type INVERTER 3 .
3-1. FUNCTION SETTING 3-1-1 INDOOR UNIT Follow the instructions in the Local Setup Procedure, which is supplied with the remote control, in accordance with the installed condition. After the power is turned on, perform the Function Setting on the remote control. The settings may be selected between the following two: Function Number or Setting Value. Settings will not be changed if invalid numbers or setting values are selected. 1-1.
1-4. Setting the Cooler room temperature correction Depending on the installed environment, the room temperature sensor may require a correction. The settings may be selected as shown in the table below. ( Setting Description Function Number Standard Factory setting) Setting Value 00 Slightly lower control 01 30 Lower control 02 Warmer control 03 1-5. Setting the Heater room temperature correction Depending on the installed environment, the room temperature sensor may require a correction.
1-7. Setting the Indoor room temperature sensor switching function (Only for Wired remote controller) The following settings are needed when use the control by Wired remote controller temperature sensor. ( Setting Description No Yes Function Number Factory setting) Setting Value 00 42 01 If setting value is “00”, room temperature is controlled by the indoor unit temperature sensor.
3-1-2 PROCEDURES TO CHANGE THE FUNCTION SETTING The function settings of the control of the indoor unit can be changed by this procedure according to the installation conditions. Incorrect settings can cause the indoor unit malfunction. After the power is turned on, perform the "FUNCTION SETTING" according to the installation conditions using the remote controller. The settings may be selected between the following two: Function Number or Setting Value.
FUNCTION SETTING METHOD (for Wireless remote controller) Entering the Function Setting Mode While pressing the FAN button and SET TEMP.( ) button simultaneously, press the RESET button to enter the function setting mode. MIN. STEP 1. Setting the Remote controller Signal Code Use the following steps to select the signal code of the remote controller. (Note that the air conditioner cannot receive a signal code if the air conditioner has not been set for the signal code.
REMOTE CONTROLLER SIGNAL CODE SETTING Use the following steps to select the signal code of the remote controller. (Note that the air conditioner cannot receive a signal code if the air conditioner has not been set for the signal code.) (1) Press the START/STOP button until only the clock is displayed on the remote controller display. (2) Press the MODE button for at least 5 seconds to display the current signal code. (initially set to ). (3) Press the SET TEMP.
3-2. THERMISTOR RESISTANCE VALUES 3-2-1 INDOOR UNIT Room temperature thermistor Temp (°C) -10.0 -5.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 Resistance(k ) Voltage(V) 58.2 44.0 33.6 25.9 20.2 15.8 12.5 10.0 8.0 6.5 5.3 4.3 0.73 0.93 1.15 1.39 1.66 1.94 2.22 2.50 2.77 3.03 3.27 3.48 Indoor heat exchanger thermistor Temp (°C) Resistance(k ) Voltage(V) -30.0 -25.0 -20.0 -15.0 -10.0 -5.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 63.0 1131.9 804.5 579.6 422.9 312.3 233.
1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan March.
