Fujitsu R410A Service Instruction
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Fujitsu R410A Service Instruction

Split type room air conditioner
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SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED
INVERTER
Models
Indoor unit
ASU18RLF
ASU24RLF
type
Outdoor unit
AOU18RLXFW1
AOU24RLXFW1

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Summary of Contents for Fujitsu R410A

  • Page 1 SPLIT TYPE ROOM AIR CONDITIONER WALL MOUNTED type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit ASU18RLF AOU18RLXFW1 ASU24RLF AOU24RLXFW1 R410A...

  • Page 2: Table Of Contents

    CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. COOLING OPERATION....................01-01 2. HEATING OPERATION....................01-02 3. DRY OPERATION......................01-02 4. AUTO CHANGEOVER OPERATION................01-03 5. INDOOR FAN CONTROL....................01-04 6. OUTDOOR FAN CONTROL..................01-06 7. LOUVER CONTROL..................... 01-07 8. COMPRESSOR CONTROL..................01-08 9.

  • Page 3: Description Of Each Control Operation

    R410A WALL MOUNTED type INVERTER 1 . DESCRIPTION OF EACH CONTROL OPERATION...

  • Page 4: Cooling Operation

    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 7°F(3.5°C) higher than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 5: Heating Operation

    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 9°F(4.5°C) than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 6: Auto Changeover Operation

    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 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 86°F(30°C) in 2°F(1°C) steps.

  • Page 7: Indoor Fan Control

    5. INDOOR FAN CONTROL 1. Fan speed ( Table 4 : Indoor fan speed ) Speed (rpm) Operation mode Air flow mode ASU18RLF ASU24RLF 1260 1530 Heating 1120 1320 1020 1220 1020 Quiet Cool air prevention S-Lo Cooling/ Fan 1260 1480 1020 1220...
  • Page 8 5. HEATING OPERATION Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Fig. 4. 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 4.

  • Page 9: Outdoor Fan Control

    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 5 : Type of motor ) AC Motor DC Motor AOU18 / 24RLXFW1 2.

  • Page 10: Louver Control

    7. LOUVER CONTROL 1. VERTICAL LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follow: ( Fig. 7 : Vertical air direction range) <Wall Mounted Type> Use the air direction adjustments within the ranges shown above. The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

  • Page 11: Compressor Control

    8. COMPRESSOR CONTROL 1. OPERATION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in the Table 10. ( Table 10 : Compressor operation frequency range ) Cooling Heating AOU18RLXFW1 12rps 55rps 14rps 67rps 15rps...

  • Page 12: Timer Operation Control

    9. TIMER OPERATION CONTROL 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 ASU18 / 24RLF 1. ON TIMER / OFF TIMER OFF timer : When the clock reaches the set time, the air conditioner will be turned off.
  • Page 13 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).

  • Page 14: Electronic Expansion Valve Control

    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 13. The compressor frequency, the temperatures detected by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.

  • Page 15: Auto Restart

    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. When the power is interrupted and recovered during timer operation, since the timer operation time is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF) the indoor unit body timer lamp.

  • Page 16: Compressor Preheating

    17. COMPRESSOR PREHEATING When the outdoor temperature is lower than 68°F(20°C) and the all operation mode has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started and when the outdoor temperature rises to 77°F(25°C) or greater, preheating is ended.

  • Page 17: Heat Insulation Condition ( Building Insulation )

    . HEAT INSULATION CONDITION ( BUILDING INSULATION ) This setting can make the room temperature control more suitable for homes or buildings with high insulation (Function Number 95). When the thermo sensor is turned ON it controls the compressor frequency at initial start to prevent overshoot in heating or cooling.

  • Page 18: Defrost Operation Control

    23. DEFROST OPERATION CONTROL 23. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 18, 19, 20 and 21. ( Table 18 : Condition of 1st defrost operation ) Compressor integrating operation time Compressor integrating operation time 1st defrost...
  • Page 19 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 1st defrost 2nd and later defrost Integrating defrost ( OFF count defrost ) Compressor...

  • Page 20: Off Defrost Operation Control

    24. OFF DEFROST OPERATION 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.

  • Page 21: Various Protections

    25. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENTION CONTROL The discharge gas thermo sensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 10rps, and it continues to decrease the frequency for 10rps every 120 seconds until the temperature becomes lower than Temperature When the discharge temperature becomes lower than Temperature , the control of the control of...
  • Page 22 3. ANTI-FREEZING CONTROL (Cooling and Dry mode) The compressor frequency is decrease on cooling and 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 26 : Anti-freezing protection operation / Release temperature ) Outdoor temperature Temperature...

  • Page 23: Trouble Shooting

    R410A WALL MOUNTED type INVERTER 2 . TROUBLE SHOOTING...

  • Page 24: Error Display

    2-1 ERROR DISPLAY 2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY Please refer the flashing pattern as follows. Indoor Unit : ASU18RLF / 24RLF The OPERATION, TIMER, ECONOMY lamps operate as follows according to the error contents. Indoor Unit Display Wired Remote Trouble Controller...

  • Page 25: Wired Remote Controller Display

    2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION) 1. SELF - DIAGNOSIS When "EE" 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.

  • Page 26: Trouble Shooting With Error Code

    2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 times Flash, Timer lamp: 1 times Flash Serial Communication Error Economy lamp: Continuous flash. (Serial Reverse Transfer Error) ERROR CODE : [E : 11] Detective Actuators:...
  • Page 27 Trouble shooting 2 Indicate or Display: Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 times Flash, Timer lamp: 1 times Flash Serial Communication Error Economy lamp: Continuous flash. (Serial Forward Transfer Error) ERROR CODE : [E : 11] Detective Actuators: Detective details: When the outdoor unit cannot properly receive the serial signal from...
  • Page 28 Trouble shooting 3 Indicate or Display: Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 times Flash, Timer lamp: 2 times Flash Wired Remote Controller Economy lamp: Continuous flash. Communication Error ERROR CODE : [E : 12] Detective Actuators: Detective details: Indoor unit Controller PCB...
  • Page 29 Trouble shooting 4 Indicate or Display: Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 3 times Flash, Timer lamp: 2 times Flash Indoor Unit Model Information Error Economy lamp: Continuous flash. EEPROM Access Abnormal ERROR CODE : [E : 32] Detective Actuators: Detective details:...
  • Page 30 Trouble shooting 5 Indicate or Display: Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 3 times Flash, Timer lamp: 5 times Flash Economy lamp: Continuous flash. Manual Auto Switch Error ERROR CODE : [E : 35] Detective Actuators: Detective details: Indoor Unit Controller PCB...
  • Page 31 Trouble shooting 6 Indicate or Display: Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 4 times Flash, Timer lamp: 1 times Flash Economy lamp: Continuous flash. Indoor Room Thermistor Error ERROR CODE : [E : 41] Detective Actuators: Detective details: Indoor unit Controller PCB Circuit...
  • Page 32 Trouble shooting 7 Indicate or Display: Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 4 times Flash, Timer lamp: 2 times Flash Indoor Heat Ex. Thermistor Error Economy lamp: Continuous flash. ERROR CODE : [E : 42] Detective Actuators: Detective details: Indoor Unit Controller PCB...
  • Page 33 Trouble shooting 8 Indicate or Display: Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 5 times Flash, Timer lamp: 1 times Flash Indoor Unit Fan Motor Error Economy lamp: Continuous flash. ERROR CODE : [E : 51] Detective Actuators: Detective details: When the condition that actual frequency of Indoor Fan is...
  • Page 34 Trouble shooting 9 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 6 times Flash, Timer lamp: 4 times Flash A.F Voltage Error Economy lamp: Continuous flash. ERROR CODE : [E : 64] Detective Actuators: Detective details: Outdoor unit Main PCB...
  • Page 35 Trouble shooting 10 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 6 times Flash, Timer lamp: 5 times Flash IPM Error Economy lamp: Continuous flash. ERROR CODE : [E : 65] Detective Actuators: Detective details: When more than normal operating current to IPM in Main PCB flows,...
  • Page 36 Trouble shooting 11 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 1 times Flash Discharge Thermistor Error Economy lamp: Continuous flash. ERROR CODE : [E : 71] Detective Actuators: Detective details: Outdoor Unit Main PCB...
  • Page 37 Trouble shooting 12 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 2 times Flash Compressor Thermistor Error Economy lamp: Continuous flash. ERROR CODE : [E : 72] Detective Actuators: Detective details: Outdoor Unit Main PCB...
  • Page 38 Trouble shooting 13 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 3 times Flash Heat Ex. Liquid Outlet Economy lamp: Continuous flash. Thermistor Error ERROR CODE : [E : 73] Detective Actuators: Detective details: Outdoor Unit Main PCB...
  • Page 39 Trouble shooting 14 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 4 times Flash Economy lamp: Continuous flash. Outdoor Thermistor Error ERROR CODE : [E : 74] Detective Actuators: Detective details: Outdoor Unit Main PCB...
  • Page 40 Trouble shooting 15 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 8 times Flash, Timer lamp: 4 times Flash Current Sensor Error Economy lamp: Continuous flash. ERROR CODE : [E : 84] Detective Actuators: Detective details: When Input Current Sensor has detected 0A, while Inverter Compressor is...
  • Page 41 Trouble shooting 16 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 8 times Flash, Timer lamp: 6 times Flash High Pressure Switch Error Economy lamp: Continuous flash. ERROR CODE : [E : 86] Detective Actuators: Detective details: When pressure switch open is detected in 10 seconds...
  • Page 42 Trouble shooting 17 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 4 times Flash Over Current Error Economy lamp: Continuous flash. ERROR CODE : [E : 94] Detective Actuators: Detective details: "Protection stop by over current generation after inverter compressor start...
  • Page 43 Trouble shooting 18 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 5 times Flash Compressor Control Error Economy lamp: Continuous flash. ERROR CODE : [E : 95] Detective Actuators: Detective details: While running the compressor, if the detected rotor location is out of...
  • Page 44 Trouble shooting 19 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 7 times Flash Outdoor Unit Fan Motor Error Economy lamp: Continuous flash. ERROR CODE : [E : 97] Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds...
  • Page 45 Indicate or Display: Trouble shooting 20 Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 9 times Flash 4-Way Valve Error Economy lamp: Continuous flash. ERROR CODE : [E : 99] Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with...
  • Page 46 Trouble shooting 21 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 10 times Flash, Timer lamp: 1 times Flash Discharge Temp. Error Economy lamp: Continuous flash. ERROR CODE : [E : A1] Detective Actuators: Detective details: "Protection stop by "discharge temperature...
  • Page 47 Trouble shooting 22 Indicate or Display: Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 10 times Flash, Timer lamp: 3 times Flash Compressor Temp. Error Economy lamp: Continuous flash. ERROR CODE : [E : A3] Detective Actuators: Detective details: "Protection stop by "compressor temperature...

  • Page 48: Trouble Shooting With No Error Code

    2-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 23 1. Power Supply failure 2. External cause Indoor Unit - No Power 3. Electrical Components defective Test 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 &...
  • Page 49 Forecast of Cause: Trouble shooting 24 1. Power Supply failure 2. External cause Outdoor Unit - No Power 3. Electrical Components defective Test 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 &...
  • Page 50 Forecast of Cause: Trouble shooting 25 1. Setting/ Connection failure 2. External cause No Operation (Power is ON) 3. Electrical Component defective Test 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.
  • Page 51 Forecast of Cause: Trouble shooting 26 1. Indoor Unit error 2. Outdoor Unit error 3. Effect by Surrounding environment No Cooling / No Heating 4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure Test 1 : Check Indoor Unit Does Indoor Unit FAN run on HIGH FAN? Is Air Filter dirty? Is Heat Exchanger clogged?
  • Page 52 Forecast of Cause : Trouble shooting 27 1. Abnormal installation (Indoor/ Outdoor) Abnormal Noise 2. Fan failure (Indoor/ Outdoor) 3. Compressor failure (Outdoor) Diagnosis method when Abnormal Noise is occurred Abnormal noise is coming from Indoor Unit. Abnormal noise is coming from Outdoor Unit. (Check and correct followings) (Check and correct followings) Is Main Unit installed in stable condition?
  • Page 53 Forecast of Cause Trouble shooting 29 1. House insulation setting has not been changed. 2. Temperature sensing location has not been changed. Too Warm 3. Installation location of the wired remote. 4. Function settings have not been changed. Test 1 : Check insulation level of structure of house Test 1-1 : Check Function Setting  ...
  • Page 54 “Wired remote sensor” Test 3 : Check the remote controller display Test 3-1 : Check Function Setting Is function 42 (Indoor room temperature sensor Is the "Thermo Sensor Icon" displayed on the screen? switching function) set to 01? Ref.) Function Number Setting Va lue Setting Description Indoor unit Both...
  • Page 55 Forecast of Cause Trouble shooting 30 1. House insulation setting has not been changed. 2. Temperature sensing location has not been changed. Too Cool 3. Installation location of the wired remote. 4. Function settings have not been changed. Test 1 : Check insulation level of structure of house Test 1-1 : Check Function Setting  ...
  • Page 56 “Wired remote sensor” Test 3 : Check the remote controller display Test 3-1 : Check Function Setting Is function 42 (Indoor room temperature sensor Is the "Thermo Sensor Icon" displayed on the screen? switching function) set to 01? Ref.) Function Number Setting Va lue Setting Description Indoor unit Both...

  • Page 57: Service Parts Information

    2-4 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting ) Abnormal noise Stops soon after starting up Does not start up Check if vibration noise by Is there open or loose connection Is there open or loose connection loose bolt or contact noise...
  • Page 58 SERVICE PARTS INFORMATION 2 Inverter Compressor Test 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) T(W) S(V) (WHITE) (BLACK) IPM PCB TM305 TM304 TM303 Inverter PCB BLACK WHITE Compressor R(U) (RED) Test 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
  • Page 59 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Test 1 : Check Connections Check connection of connector ( Loose connector or open cable ) EXPANSION VALVE COIL BLUE ORANGE CN700 YELLOW WHITE Test 2 : Check Coil of EEV Test 3 : Check Voltage from Main PCB.
  • Page 60 SERVICE PARTS INFORMATION 4 Indoor unit Fan motor Test 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. Test 2 : Check resistance of Indoor Fan Motor Refer to below.
  • Page 61 SERVICE PARTS INFORMATION 6 Active filter module Test 1 : Check Open or Short-circuit and Diode (D1) Remove connector, check the open or short-circuit and the diode in the module Check the open or short-circuit Table.1 Each type standard value LOT No.
  • Page 62 SERVICE PARTS INFORMATION 7 Mounted on Transistor PCB) Test 1 : Check the Transistor PCB ( for Resistance ) 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.

  • Page 63: Appending Data

    R410A WALL MOUNTED type INVERTER 3 . APPENDING DATA...

  • Page 64: Function Setting

    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.
  • Page 65 1-4. Setting the Remote controller custom code (Only for wireless remote controller) The indoor unit custom code can be changed. Select the appropriate custom code. Factory setting) Function Number Setting Value Setting Description 1-5. Setting the External input control "Operation / Stop" mode or "Forced stop" mode can be selected. Factory setting) Function Number Setting Value...
  • Page 66 Temperature Correction When changing Function 95, perform this setting before other Room temp. control settings (Function 30, 31, 92, 93). If Function 95 is not set fi rst, Room temperature control settings (Function 30, 31, 92, 93) ill be reset and you must re-do them again. 1-7.
  • Page 67 1-9 .  Setting the Room temperature control for wired remote controller sensor Depending on the installed environment, correction of the wire remote temperature sensor may be required. Select the appropriate control setting according to the installed environment. To change this setting, set Function 42 to Both "01". Ensure that the Thermo Sensor icon is displayed on the remote controller screen.

  • Page 68: Procedurse To Change The Function Setting For Wireless Rc

    3-1-2 PROCEDURSE TO CHANGE THE FUNCTION SETTING FOR WIRELESS RC This procedure changes to the function settings used to control the indoor unit 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.
  • Page 69 Custom code setting for remote controller (1) Press the MODE button for more then 5 seconds. (2) Press the SET TEMP. ( ) buttons to change the signal code between Match the code on the display to the air conditioner signal code. (initially set to (3) Press the MODE button.

  • Page 70: Outdoor Unit Pressure Value Andtotal Electric Current Curve

    3-2. OUTDOOR UNIT PRESSURE VALUE AND TOTAL ELECTRIC CURRENT CURVE Outdoor Unit Low Pressure Value and Outdoor Total Electric Current Curve (Cooling) Model Name : ASU18RLF [Condition] Ambient temperature : Indoor / Outdoor - Same temperature Refrigerant amount : Standard amount Piping length : 25ft.
  • Page 71 Outdoor Unit High Pressure Value and Outdoor Total Electric Current Curve (Heating) Model Name : ASU18RLF [Condition] Ambient temperature : Indoor 59 °F, 68°F, 73.4°F , Outdoor 35.6 °F, 44.6°F, 53.6°F °C , 20 °C , 23 °C) °C °C , 12 °C) Refrigerant amount : Standard amount...
  • Page 72 Outdoor Unit Low Pressure Value and Outdoor Total Electric Current Curve (Cooling) Model Name : ASU24RLF [Condition] Ambient temperature : Indoor / Outdoor - Same temperature Refrigerant amount : Standard amount Piping length : 7.5m (Height difference 1m) Power voltage : 60Hz - 230V Operation condition : TEST mode (Cooling), Hi Fan, Horizontal direction, Front air flow Measuring method : Measure the low pressure with the pressure meter at the service valve.
  • Page 73 Outdoor Unit High Pressure Value and Outdoor Total Electric Current Curve (Heating) Model Name : ASU24RLF [Condition] Ambient temperature : Indoor 59 °F, 68°F, 73.4°F , Outdoor 35.6 °F, 44.6°F, 53.6°F °C , 20 °C , 23 °C) °C °C , 12 °C) Refrigerant amount : Standard amount...

  • Page 74: Thermistor Resistance Values

    3-3. THERMISTOR RESISTANCE VALUES Thermistor resistance values Room temperature thermistor Indoor heat exchanger thermistor Tempe°F Tempe°C Resistance(k ) Voltage(V) Tempe°F Tempe°C Resistance(k ) Voltage(V) 32.0 33.62 1.15 32.0 176.03 1.10 41.0 25.93 1.39 41.0 134.23 1.36 50.0 10.0 20.17 1.66 50.0 10.0 103.34...
  • Page 75 Outdoor heat exchanger thermistor Outdoor Temprature thermistor Tempe°F Tempe°C Resistance(k ) Voltage(V) Tempe°F Tempe°C Resistance(k ) Voltage(V) 224.33 0.73 -22.0 -30.0 95.58 0.24 -22.0 -30.0 -13.0 -25.0 68.90 -13.0 -25.0 159.71 0.97 0.32 -4.0 -20.0 50.31 0.43 -4.0 -20.0 115.24 1.25 84.21 1.56...
  • Page 76 3-3-17,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Jan. 2016 Printed in Japan...

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