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• Page 1: Wall Mounted

  SPLIT TYPE ROOM AIR CONDITIONER WALL MOUNTED type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AS*G18LFCA AO*G18LFC 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 1-1 COOLING CAPACITY CONTROL 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 2°C higher than a set temperature, the compressor operation frequency will attain to maximum performance.

• Page 5: Heating Operation

  2. HEATING OPERATION 2-1 HEATING CAPACITY CONTROL 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 3°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, DRY and MONITORING modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 18°C and 30°C in 1°C steps.

• Page 7: Indoor Fan Control

  5. INDOOR FAN CONTROL 1. Fan speed ( Table 4 : Indoor Fan Speed ) AS*G18LFCA Operation mode Air flow mode Speed (rpm) 1220 Heating 1120 1020 Quiet Cool air prevention S-Lo Cooling 1220 1020 Quiet X zone: 710 J zone: 660 2.

• Page 8
  ( Fig.6 : Indoor Fan Control ) Compressor Indoor fan Setting air flow Indoor fan (as shown in Table 5) S-Lo (SEC) ( Table 5 : Indoor fan speed ) Cooling X zone J zone Y zone AS*G18LFCA 710rpm 660rpm 270rpm 710rpm 01-05…

• 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 6 : Type of Motor ) AC Motor DC Motor AO*G18LFC 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: : During Heating/ Cooling/ Dry modes , , , , The Remote Controller’s display does not change. Use the air direction adjustments within the ranges shown above.

• Page 11: Compressor Control

  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 9. (Table 9 : Compressor Operation Frequency Range) Cooling Heating AO*G18LFC 18rps 113rps 18rps 130rps 20rps 34rps 2.

• Page 12: Timer Operation Control

  (Table 10 : Timer Setting) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER AS*G18LFCA 1. OPEARTION FREQUENCY RANGE 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.

• 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 1°C.
• Page 14
  ( Table11 : Timer Setting ) ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER AS*G18LFCA 1. ON TIMER / OFF TIMER Same to 9-1 1.ON TIMER / OFF TIMER and shown in those. 2. WEEKLY TIMER This timer function can set operation times of the each day of the week.

• Page 15: 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 following values. 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 16: 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 17: Compressor Preheating

  17. COMPRESSOR PREHEATING When the outdoor heat exchanger temperature is lower than 5°C and the heating operation 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 7°C or greater, preheating is ended.

• Page 18: Defrost Operation Control

  20. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts when the outdoor heat exchanger temperature sensor (Tn) detects the temperature lower than the values shown in Table16. ( Table 16 : Condition of starting Defrost Operation ) Compressor integrating operation time Normal defrost Less than 25 min.

• Page 19
  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) Normal defrost Integrating defrost (Constant monitoring) Compressor Compressor Compressor Compressor integrating…

• Page 20: Off Defrost Operation Control

  21. 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.

• Page 21: Various Protections

  22. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION 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 .

• Page 22
  4. COOLING PRESSURE OVERRISE PROTECTION When the outdoor unit heat exchange sensor temperature rises to 67°C or greater, the compressor is stopped and trouble display is performed. 5. HIGH TEMPERATURE RELEASE CONTROL ( HEATING MODE ) On heating mode, the compressor frequency is controlled as following based on the detection value of the indoor heat exchanger temperature sensor.

• Page 23: Trouble Shooting

  R410A WALL MOUNTED type INVERTER 2 . TROUBLE SHOOTING…

• Page 24: Error Display

  2. TROUBLESHOOTING 2-1 ERROR DISPLAY 2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY Please refer the flashing pattern as follows. The OPERATION,TIMER,ECONOMY lamps operate as follows according to the error contents. Indoor Unit Display Wired Remote Trouble Controller shooting Error Contents OPERATION TIMER ECONOMY…

• Page 25: Wired Remote Controller Display (Option)

  2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION) 1. SELF — DIAGNOSIS When » Er » in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed servise 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 1-1 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Serial Communication Error (Serial Reverse Transfer Error) Detective details: Detective Actuators: When the indoor unit cannot receive the serial signal from Outdoor unit Outdoor unit Main PCB more than 2minutes after power ON, or the indoor unit cannot receive Outdoor unit Fan motor…

• Page 27
  Trouble shooting 1-2 Indicate or Display: INDOOR UNIT Error Method: 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 Indoor unit Controller PCB more than 10seconds.
• Page 28
  Trouble shooting 2 Indicate or Display: INDOOR UNIT Error Method: Wired Remote Controller Refer to error code table. Communication Error Detective details: Detective Actuators: When the indoor unit cannot receive the signal from Wired Remote Control Indoor unit Controller PCB more than 1minute during normal operation.
• Page 29
  Trouble shooting 3 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Unit Model Information Error EEPROM Access Abnormal Detective details: Detective Actuators: When power is on and there is some below case. Indoor unit Controller PCB 1.
• Page 30
  Trouble shooting 4 Indicate or Display: INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Manual Auto Switch Error Detective Actuators: Detective details: Indoor unit Controller PCB When the Manual Auto Switch becomes ON for consecutive 60 or more seconds.
• Page 31
  Indicate or Display: Trouble shooting 5 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Indoor Room Thermistor Error Detective details: Detective Actuators: Indoor unit Controller PCB When Room Temperature Thermistor open or short-circuit is detected. Room Temperature Thermistor Forecast of Cause : 1.
• Page 32
  Trouble shooting 6 Indicate or Display: INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Indoor Heat Ex. Thermistor Error Detective Actuators: Detective details: When Heat Ex. Temperature Thermistor open or short-circuit is detected. Indoor unit Controller PCB Heat Ex.
• Page 33
  Trouble shooting 7 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor Unit Fan Motor Error Detective Actuators: Detective details: When the condition that actual frequency of Indoor Fan is Indoor unit Controller PCB below 1/3 of target frequency is continued more than 56 seconds. Indoor unit fan motor Forecast of Cause: 1.
• Page 34
  Trouble shooting 8 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Main PCB Error Detective details: Detective Actuators: Access to EEPROM failed due to some cause after outdoor unit started. Outdoor unit Main PCB Forecast of Cause: 1.
• Page 35
  Trouble shooting 9 Indicate or Display: OUTDOOR UNIT Error Method: INDOOR UNIT 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, Outdoor unit Main PCB the compressor stops.
• Page 36
  Trouble shooting 10 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. IPM Error Detective Actuators: Detective details: When more than normal operating current to IPM in Main PCB flows, Outdoor unit Main PCB the compressor stops. Compressor After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again.
• Page 37
  Trouble shooting 11 Indicate or Display: OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Discharge Thermistor Error Detective details: Detective Actuators: When Discharge pipe temperature thermistor open or short-circuit Outdoor unit Main PCB is detected at power ON or while running the compressor. Discharge pipe temperature thermistor Forecast of Cause : 1.
• Page 38
  Trouble shooting 12 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Heat Ex. Liquid Outlet Thermistor Error Detective details: Detective Actuators: Outdoor unit Main PCB When Heat exchanger temperature thermistor open or Heat exchanger temperature thermistor short-circuit is detected at power ON or while running the compressor.
• Page 39
  Trouble shooting 13 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Thermistor Error Detective details: Detective Actuators: Outdoor unit Main PCB When Outdoor temperature thermistor open or short-circuit is Outdoor temperature thermistor detected at power ON or while running the compressor. Forecast of Cause : 1.
• Page 40
  Trouble shooting 14 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Current Sensor Error Detective Actuators: Detective details: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor unit Main PCB operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1.
• Page 41
  Trouble shooting 15 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Over Current Error Detective details: Detective Actuators: «Protection stop by overcurrent generation after inverter compressor start Outdoor unit Main PCB processing completed» generated consecutively 10 times. Compressor * The number of generations is reset if the start-up of the compressor succeeds.
• Page 42
  Trouble shooting 16 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Compressor Control Error Detective details: Detective Actuators: If the detected rotor location is out of phase with actual rotor location Outdoor unit Main PCB more than 105°(at start-up) and 120°(in operation), Compressor the compressor stops.

• Page 43: Outdoor Unit Fan Motor Error

  Trouble shooting 17 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Fan Motor Error Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Main PCB after fan motor starts, fan motor stops.

• Page 44: 4-Way Valve Error

  Trouble shooting 18 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. 4-Way Valve Error Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with Indoor unit Controller PCB the room temperature, and either following condition is detected Heat Ex.

• Page 45
  Trouble shooting 19 Indicate or Display: OUTDOOR UNIT Error Method: INDOOR UNIT Discharge Temp. Error Refer to error code table. Detective details: Detective Actuators: «Protection stop by «discharge temperature 110degC during compressor Outdoor unit Main PCB operation»» generated 2 times within 24 hours. Discharge temperature thermistor Forecast of Cause : 1.

• Page 46: Trouble Shooting With No Error Code

  2-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 20 1. Power Supply failure 2. External cause Indoor Unit — No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable.

• Page 47
  Forecast of Cause: Trouble shooting 21 1. Power Supply failure 2. External cause Outdoor Unit — No Power 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 &…
• Page 48
  Forecast of Cause: Trouble shooting 22 1. Setting/ Connection failure 2. External cause No Operation (Power is ON) 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.
• Page 49
  Forecast of Cause: Trouble shooting 23 1. Indoor Unit error 2. Outdoor Unit error No Cooling / No Heating 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?
• Page 50
  Forecast of Cause : Trouble shooting 24 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 51: 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 52
  SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) Terminal cover opened S(W) (WHITE) (RED) C(T) (BLACK) Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
• Page 53
  SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector (CN40) ( Loose connector or open cable ) EXPANSION VALVE COIL BLUE ORANGE CN40 YELLOW WHITE Check Point 2 : Check Coil of EEV Check Point 3 : Check Voltage from Main PCB.
• Page 54
  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.

• Page 55: Appending Data

  R410A WALL MOUNTED type INVERTER 3 . APPENDING DATA…

• Page 56: 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 57
  1-4. Setting the Auto Restart Enable or disable automatic system restart after a power outage. Factory setting) Setting Description Function Number Setting Value 1-5. 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.

• Page 58: Procedures To Change The Function Setting For Wireless Rc

  3-1-2 Procedures 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 59
  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 60: Outdoor Unit Pressure Value And Total 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 : AS*G18LFCA [Condition] Ambient Indoor / Outdoor — Same temperature temperature Refrigerant Standard amount amount Piping 5.0m (Height difference 1m)

• Page 61
  Outdoor Unit High Pressure Value and Outdoor Total Electric Current Curve (Heating) Model Name : AS*G18LFCA [Condition] Ambient Indoor 15, 20, 23 °C / Outdoor 2, 7, 12 °C temperature Refrigerant Standard amount amount Piping 5.0m (Height difference 1m) length…

• Page 62: Thermistor Resistance Values

  3-3. Thermistor Resistance Values 3-3-1 INDOOR UNIT Room temperature thermistor Indoor heat exchanger thermistor Temp (°C) Resistance(k ) Voltage(V) Temp (°C) Resistance(k ) Voltage(V) -10.0 58.2 0.73 -30.0 1131.9 0.21 -5.0 44.0 0.93 -25.0 804.5 0.29 33.6 1.15 -20.0 579.6 0.40 25.9 1.39…

• Page 63
  1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Sep. 2011 Printed in Japan…

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