Fujitsu AU G18LVLB Series Service Instruction
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Fujitsu AU G18LVLB Series Service Instruction

Fujitsu AU G18LVLB Series Service Instruction

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SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
Compact cassette / cassette
Slim Duct / DUCT
Floor/Ceiling / Ceiling type
SIMULTANEOUS MULTI
Models Indoor unit Outdoor unit
AU*G18LVLB
AU*G22LVLA
AU*G24LVLA
AU*G30LRLE
AU*G36LRLE
AU*G45LRLA
AB*G18LVTB
AB*G22LVTA
AB*G24LVTA
AB*G30LRTE
AB*G36LRTE
AB*G45LRTA
AR*G18LLTB
AR*G22LMLA
AR*G24LMLA
AR*G30LMLE
AR*G36LMLE
AR*G45LMLA
AO*G72LRLA
AO*G90LRLA

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Summary of Contents for Fujitsu AU G18LVLB Series

  • Page 1 SPLIT TYPE ROOM AIR CONDITIONER Compact cassette / cassette Slim Duct / DUCT Floor/Ceiling / Ceiling type SIMULTANEOUS MULTI SERVICE INSTRUCTION Models Indoor unit Outdoor unit AU*G18LVLB AO*G72LRLA AO*G90LRLA AU*G22LVLA AU*G24LVLA R410A AU*G30LRLE AU*G36LRLE AU*G45LRLA AB*G18LVTB AB*G22LVTA AB*G24LVTA AB*G30LRTE AB*G36LRTE AB*G45LRTA AR*G18LLTB AR*G22LMLA...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATIONS 1. DESCRIPTION OF EACH CONTROL OPERATION 1-1 SYSTEM OUTLINE..................... 01-01 1-2 CAPACITY CONTROL....................01-02 1-3 AUTO CHANGEOVER OPERATION................. 01-02 1-4 INDOOR FAN CONTROL................... 01-04 01-08 1-5 OUTDOOR FAN CONTROL..................1-6 COMPRESSOR CONTROL..................01-09 01-10 1-7 LOUVER CONTROL....................1-8 ELECTRONIC EXPANSION VALVE CONTROL............

  • Page 3: Description Of Each Control Operation

    R410A Compact cassette / cassette Slim Duct / DUCT Floor/Ceiling / Ceiling type SIMULTANEOUS MULTI 1 . DESCRIPTION OF EACH CONTROL OPERATION...

  • Page 4: System Outline

    1-1. SYSTEM OUTLINE Junction box—indoor unit (primary) 3-wires Power cable Junction box—indoor unit (secondary) 2-wires Outdoor unit 4-wires Bus wire Indoor unit—indoor unit 3-wires Remote controller cable 3-wires Example: Outdoor unit Power cable (Junction box - indoor unit Power supply Main breaker connection cable) 400 V ~ 50 Hz...

  • Page 5: Capacity Control

    1-2. CAPACITY CONTROL Compressor frequency decides by capacity of an indoor unit, operation number of an indoor unit, set temperature, room temperature and outside temperature. 1-3. AUTO CHANGEOVER OPERATION When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum mode from among the Heating, Cooling, and Monitoring mode.
  • Page 6 AUTO CHANGEOVER operation flow chart START Setting temperature Monitor mode Room temp. Ts+2 °C ? Room temp. Ts -2 °C ? Middle zone Auto change over is second or more? Operation mode before the monitor mode is cooling mode? Operation mode of HEATING OPERATION COOLING OPERATION outdoor unit : Cooling?

  • Page 7: Indoor Fan Control

    1-4. INDOOR FAN CONTROL 1. Fan speed (Table 2 : Indoor Fan Speed) AU *G18LVLB AU *G22/ 24LVLA AU *G30LRLE Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) Heating Heating Heating...
  • Page 8 AB *G22/ 24LVTA AB *G18LVTB AB *G30LRTE Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) 1040 1300 1000 Heating Heating Heating 1000 1200 1000 1150 1000 Quiet Quiet Quiet Cool air prevention...
  • Page 9 2. FAN OPERATION The airflow can be switched in 5 steps such as Auto, Quiet, Low, Med, High, while the indoor fan only runs. 3. COOLING OPERATION (Auto : Cooling) Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Figure 2.
  • Page 10 5. COOL AIR PREVENTION CONTROL (Heating mode) The maximum value of the indoor fan speed is set as shown in Figure 4, based on the detected temperature by the indoor heat exchanger sensor on heating mode. When the compressor does not operate, the indoor fan motor operates [S-Lo] or [Stop] mode. ( Fig 4 : Cool Air Prevention Control ) [ Cassette, Ceiling type ] Indoor heat exchanger...

  • Page 11: Outdoor Fan Control

    1-5. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor Following table shows the fan speed of the outdoor unit. ( Table 3 : Fan speed of the outdoor unit ) Cooling Heating 780/ 680/ 660/ 590/ 680/ 660/ 590/ 520/ Upper fan 520/ 450/ 440/ 380/ 300 rpm 450/ 440/ 380/ 300 rpm AO*G72LRLA...

  • Page 12: Compressor Control

    1-6. COMPRESSOR CONTROL 1. OPERATION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in Table 4. (Table 4 : Compressor Operation Frequency Range) Cooling Heating AO*G72LRLA 15rps 81rps 15rps 81rps AO*G90LRLA 15rps 90rps 15rps...

  • Page 13: Louver Control

    1-7. LOUVER CONTROL 1. For Ceiling type < AB *G18LVTB, AB *G22/ 24LVTA > (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig 6 : Air Direction Range) (Operation Range) During Cooling / Heating / Dry / Fan mode : Use the air direction adjustments within the ranges shown above.
  • Page 14 (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig 7 : Air Direction Range) RIGHT/LEFT air direction louvers Use the air direction adjustments within the ranges shown above. The remote control unit's display does not change. 1-4.
  • Page 15 2. For Ceiling Type < AB *G30LRTE/ 36/ 45LRTE > (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig 8 : Air Direction Range) (Operation Range) During Cooling / Heating / Dry / Fan mode : Use the air direction adjustments within the ranges shown above.
  • Page 16 (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig 9 : Air Direction Range) Use the air direction adjustments within the ranges shown above. The remote control unit's display does not change. 2-4.
  • Page 17 3. For Compact Cassette Type < AU *G18LVLB, AU *G22/ 24LVLA > (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig 10 : Air Direction Range) (Operation Range) During Cooling / Heating / Dry / Fan mode : Use the air direction adjustments within the ranges shown above.
  • Page 18 4. For Cassette Type < AU *G30/ 36LRLE/ 45LRLA > (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig 11 : Air Direction Range) (Operation Range) During Cooling / Dry / Fan mode : During Heating mode Use the air direction adjustments within the ranges shown above.

  • Page 19: Electronic Expansion Valve Control

    1-8. 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 and the outdoor temperature sensor. The pulse range of the electronic expansion valve control is AO*G72/90LRLA 50 ~ 500 pulses (Cooling) and 50 ~ 500 pulses (Heating).

  • Page 20: Pump Down

    1-13. PUMP DOWN 14.2. Pump down procedure WARNING (1) Check the 3-way valves (both the liquid side and gas side) are opened. Never touch electrical components such as the terminal blocks except the button on (2) Turn the power on. the display board.

  • Page 21: Compressor Preheating

    1-14. COMPRESSOR PREHEATING When the outdoor temperature is lower than 20°C and the all operation mode has been stopped for 30 minutes, Turn on the belt heater power. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started and when the outdoor temperature rises to 26°C or greater, preheating is ended.

  • Page 22: Defrost Operation Control

    1-17. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 7, 8,and9. ( Table 7 : Condition of 1st defrost operation) Compressor integrating operation time 1st defrost Less than 22 minutes More than 22 minutes More than 62 minutes after...
  • Page 23 4. 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 (Constant monitoring) Compressor Compressor...

  • Page 24: Off Defrost Operation Control

    1-18. 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 25: Compomressor Speed Control

    1-19. COMPOMRESSOR SPEED CONTROL When the detection value of outdoor temperature sensor is lower than temperature in the table below, the compressor speed is controlled. (Table 12 : Operation temperature of compressor speed control) Temperature Cooling Heating Operation temperature - 20°C Operation overview 120 rpm (Max) Operation release...

  • Page 26: Various Protections

    1-21. 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 10rps(72/90) and it continues to decrease the frequency for 10rps every 120 seconds until the temperature becomes lower than Temperature .
  • Page 27 [ Cooling ] (Control / Release) Outdoor unit fan speed (UP / LO) AO*G72LRLA 780/740rpm 680/680rpm 680/680rpm 660/660rpm 590/510rpm 520/400rpm 440/330rpm 380/300rpm 300/300rpm 450/ 0rpm 300/ 0rpm AO*G90LRLA 780/740rpm 780/740rpm 730/690rpm 660/660rpm 590/510rpm 520/400rpm 440/330rpm 380/300rpm 300/300rpm 450/ 0rpm 300/ 0rpm °C <...
  • Page 28 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 14 : Anti-freezing Protection Operation / Release Temperature) Outdoor temperature Temperature...
  • Page 29 5. HIGH PRESSURE PROTECTION When the pressure switch becomes OFF (Open : higher than 4.2 MPaG), the compressor is stopped. It is released when the pressure switch becomes ON (Close : lower than 3.2 MPaG) after 3 minutes of compressor stop. 6.

  • Page 30: Low Noise Operation

    1-22. LOW NOISE OPERATION The compressor speed and the outdoor unit fan sp eed are limited to reduce the operation noise by External Input. During the LOW NOISE OPERATION, "CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION" and "PEAK CUT OPERATION" are effective, and the outdoor unit operates by lowest current of them. However, during the DEFROST OPERATION, the compressor operates by the speed for DEFROST OPERATION.

  • Page 31: Drain Pump Operation (Option)

    1-23. DRAIN PUMP OPERATION (OPTION) 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 as show in Fig16. 3. When the compressor stops by the "Anti- freezing protection", the drain pump is turned off in 1 hour after the compressor stops.

  • Page 32: Peak Cut Operation

    1-24. PEAK CUT OPERATION The Current Value is limited to reduce the power consumption by External Input. During the PEAK CUT OPERATION, "CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION" and "LOW NOISE OPERATION" are effective, and the outdoor unit operates by lowest current of them. However, this function becomes invalid during DEFROST OPERATION.

  • Page 33: Description Of Display Unit

    1-25. DESCRIPTION OF DISPLAY UNIT 1-25-1 Layout of Display Unit Various settings can be adjusted by changing Push switches on the board of the outdoor unit. • (Excerpt from the “INSTALATION MANUAL”) LED DISPLAY PUSH SWITCH Display lamp Function or operation method Lights on while power on.
  • Page 34 1-25-2 Display mode 1-00. ERROR HISTORY MODE In this mode, the "Operation Condition" and "Error Code" can be displayed by Push Switch on outdoor unit PCB • : Light OFF : Light ON : Blinking 1 : 1 Time Blinking (Table :17 Procedure for Present Value) Power Error...
  • Page 35 (Table 19 : Detail of LED Display Data) : Light OFF : Light ON 1 : 1 Time Blinking Power Error Item No, Display Item Mode Compressor 1 ~ 15 Frequency 16 ~ 30 ( 0 ~ 95rps ) 31 ~ 45 46 ~ 60 61 ~ 75 76 ~ 90...
  • Page 36 : Light OFF : Light ON 1 : 1 Time Blinking Power Error Item No, Display Item Mode ~ -15 Outdoor Air -15 ~ -5 Temperature -5 ~ 5 ° ( -30 ~ 70 5 ~ 15 15 ~ 25 25 ~ 35 35 ~ 45 45 ~...
  • Page 37 1-25-3 Error history mode 1-00. ERROR HISTORY MODE In this mode, the history of abnormality that occurred in the past can be confirmed. • (Table : 20 Procedure for History Mode ) n : n Times Blinking : Light OFF : Light ON : Blinking 2 : 2 Times Blinking...
  • Page 38 (Table : 22 Error Code) : Light OFF : Light ON 2 : 2 Times Blinking : 1~ 15 Times Blinking Combination error Indoor unit combination error 1-25-4 ERROR CHECK MODE 1-00. ERROR HISTORY MODE In this mode, abnormality that is occurring now can be confirmed. •...

  • Page 39: Trouble Shooting

    R410A Compact cassette / cassette Slim Duct / DUCT Floor/Ceiling / Ceiling type SIMULTANEOUS MULTI 2 . TROUBLE SHOOTING...

  • Page 40: Error Display

    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 Error Contents Operation Timer Economy Controller...
  • Page 41 Indoor Unit Display Wired Remote Trouble Error Contents Operation Timer Economy Controller shooting Display (Green) (Orange) (Green) Compressor Thermistor Error Continuous 7 times 2 times Heat Ex. Outlet Thermistor Error Continuous 7 times 3 times 7 times 4 times Outdoor Thermistor Error Continuous Continuous 7 times...
  • Page 42 2-1-2 WIRED REMOTE CONTROLLER DISPLAY For UTY-RNN*M 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.
  • Page 43 For UTY-RVN*M If an error occurs, the power indicator (green) blinks and the following display will be shown. If “Error” is displayed, immediately stop the air conditioner operation, and consult authorized service personnel. • When there is an error on this remote controller: Error Mo 10:00 Remote controller...
  • Page 44 2-1-3 OUTDOOR UNIT DISPLAY You can determine the operating status by the lighting up and blinking of the LED lamp. Display when an error occurs. PUMP PEAK POWER/ DOWN NOISE ERROR MODE LED display part (L1) (L2) (L3) (L4) (L5) (L6) ●...

  • Page 45: Trouble Shooting With Error Code

    2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor Unit : No indication Indoor Unit : Operation lamp: 1 time Flash, Timer lamp: 1 time Flash Serial Communication Error Economy lamp : Continuous flash. (Serial Reverse Transfer Error) ERROR CODE : [E : 11] Detective Actuators:...
  • Page 46 Outdoor unit : Trouble shooting 2 Indicate or Display: PUMP PEAK INDOOR UNIT Error Method: POWER Indoor Unit : Operation lamp: 1 time Flash, DOWN NOISE ERROR MODE (L1) (L2) (L3) (L4) (L5) (L6) Timer lamp: 1 time Flash Serial Communication Error Economy lamp : Continuous flash.
  • Page 47 Trouble shooting 3 Indicate or Display: Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 2 time Flash ERROR Wired Remote Controller MODE (L1) (L2) (L3) (L4) (L5) (L6) Economy lamp : Continuous flash.
  • Page 48 Indicate or Display: Trouble shooting 4 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 5 time Flash MODE (L1) (L2) (L3) (L4) (L5) (L6) Automatic Air flow Adjustment Error Economy lamp : Continuous flash.
  • Page 49 Trouble shooting 5 Indicate or Display: Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 8 time Flash ERROR External communication error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 50 Trouble shooting 6 Indicate or Display: Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 2 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 1 time Flash ERROR Unit number or Refrigerant circuit MODE (L1) (L2) (L3) (L4) (L5)
  • Page 51 Indicate or Display: Trouble shooting 7 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 2 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 2 time Flash ERROR MODE (L1) (L2) (L3) (L4) (L5) (L6) Indoor unit capacity error Economy lamp : Continuous flash.
  • Page 52 Indicate or Display: Trouble shooting 8 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 2 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 3 time Flash ERROR (L1) (L2) (L3) (L4) (L5) (L6) Combination error MODE Economy lamp : Continuous flash.
  • Page 53 Indicate or Display: Trouble shooting 9 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 2 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 4 time Flash ERROR Connection unit number error (L1) (L2) (L3) (L4) (L5) (L6) MODE...
  • Page 54 Indicate or Display: Trouble shooting 10 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 2 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 6 time Flash ERROR Indoor unit address setting error (L1) (L2) (L3) (L4) (L5) (L6)
  • Page 55 Trouble shooting 11 Indicate or Display: Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 2 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 7 time Flash Primary unit, secondary unit setup error (L1) (L2) (L3) (L4) (L5)
  • Page 56 Indicate or Display: Trouble shooting 12 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 2 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 9 time Flash MODE (L1) (L2) (L3) (L4) (L5) (L6) Connection unit number error (Indoor Economy lamp : Continuous flash.
  • Page 57 Trouble shooting 13 Indicate or Display: Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 3 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Indoor unit PCB model Timer lamp: 2 time Flash (L1) (L2) (L3) (L4) (L5) (L6) MODE...
  • Page 58 Trouble shooting 14 Indicate or Display: Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 3 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 3 time Flash Indoor unit motor electricity (L1) (L2) (L3) (L4) (L5) (L6) MODE...
  • Page 59 Indicate or Display: Trouble shooting 15 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 3 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 5 time Flash Manual auto switch Error (L1) (L2) (L3) (L4) (L5) (L6) MODE...
  • Page 60 Indicate or Display: Trouble shooting 16 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 3 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 9 time Flash Indoor unit power supply error for MODE (L1) (L2) (L3) (L4)
  • Page 61 Indicate or Display: Trouble shooting 17 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 3 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 10 time Flash Indoor unit Communication circuit MODE (L1) (L2) (L3) (L4) (L5) (L6)
  • Page 62 Indicate or Display: Trouble shooting 18 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 4 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 1 time Flash Indoor Room Thermistor Error (L1) (L2) (L3) (L4) (L5) (L6) MODE...
  • Page 63 Indicate or Display: Trouble shooting 19 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 4 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 2 time Flash Indoor Heat Ex. Thermistor Error MODE (L1) (L2) (L3) (L4) (L5)
  • Page 64 Indicate or Display: Trouble shooting 20 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 5 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 1 time Flash (L1) (L2) (L3) (L4) (L5) (L6) MODE Indoor Unit Fan Motor1 Error Economy lamp : Continuous flash.
  • Page 65 Indicate or Display: Trouble shooting 21 Outdoor unit : INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 5 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 3 time Flash Drain pump Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 66 Trouble shooting 22 Indicate or Display: Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 6 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Outdoor unit main PCB model Timer lamp: 2 time Flash (L1) (L2) (L3) (L4) (L5) (L6)
  • Page 67 Indicate or Display: Trouble shooting 23 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 6 time Flash, PUMP PEAK POWER Timer lamp: 3 time Flash DOWN NOISE ERROR Inverter Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 68 Indicate or Display: Trouble shooting 24 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 6 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 5 time Flash IPM Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 69 Trouble shooting 25 Indicate or Display: Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 1 time Flash Discharge Thermistor Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 70 Indicate or Display: Trouble shooting 26 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 time Flash, PUMP PEAK POWER Timer lamp: 2 time Flash DOWN NOISE ERROR Compressor Thermistor Error MODE (L1) (L2) (L3) (L4) (L5) (L6) Economy lamp : Continuous flash.
  • Page 71 Indicate or Display: Outdoor unit : Trouble shooting 27 Indoor Unit : Operation lamp: 7 time Flash, PUMP PEAK OUTDOOR UNIT Error Method: POWER DOWN NOISE ERROR Timer lamp: 3 time Flash (L1) (L2) (L3) (L4) (L5) (L6) MODE Heat Ex. Outlet Temp. Economy lamp : Continuous flash.
  • Page 72 Indicate or Display: Trouble shooting 28 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 4 time Flash ERROR Outdoor Thermistor Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 73 Indicate or Display: Trouble shooting 29 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 7 time Flash ERROR Transistor PCB MODE (L1) (L2) (L3) (L4) (L5) (L6) Economy lamp : Continuous flash.
  • Page 74 Indicate or Display: Trouble shooting 30 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 8 time Flash, PUMP PEAK POWER DOWN NOISE ERROR Timer lamp: 4 time Flash Current Sensor Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 75 Indicate or Display: Outdoor unit : Trouble shooting 31 Indoor Unit : Operation lamp: 8 time Flash, OUTDOOR UNIT Error Method: PUMP PEAK POWER DOWN NOISE Timer lamp: 6 time Flash ERROR MODE (L1) (L2) (L3) (L4) (L5) (L6) Pressure Switch Error Economy lamp : Continuous flash.
  • Page 76 Indicate or Display: Trouble shooting 32 OUTDOOR UNIT Error Method: Outdoor unit : Indoor Unit : Operation lamp: 9 time Flash, Timer lamp: 4 time Flash PUMP PEAK POWER Over Current Error DOWN NOISE ERROR Economy lamp : Continuous flash. (L1) (L2) (L3)
  • Page 77 Indicate or Display: Trouble shooting 33 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 5 time Flash ERROR Compressor Control Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 78 Indicate or Display: Trouble shooting 34 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 7 time Flash ERROR (L1) (L2) (L3) (L4) (L5) (L6) MODE Outdoor Unit Fan Motor 1 Error Economy lamp : Continuous flash.
  • Page 79 Indicate or Display: Trouble shooting 35 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 time Flash, PUMP PEAK Timer lamp: 8 time Flash POWER DOWN NOISE ERROR Outdoor Unit Fan Motor 2 Error Economy lamp : Continuous flash. (L1) (L2) (L3)
  • Page 80 Indicate or Display: Trouble shooting 36 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 time Flash, PUMP PEAK POWER Timer lamp: 9 time Flash DOWN NOISE 4-Way Valve Error ERROR (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 81 Indicate or Display: Trouble shooting 37 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 10 time Flash, PUMP PEAK POWER Timer lamp: 1 time Flash Discharge Temp. Error DOWN NOISE ERROR MODE (L1) (L2) (L3) (L4) (L5) (L6) Economy lamp : Continuous flash.
  • Page 82 Indicate or Display: Trouble shooting 38 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 10 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 3 time Flash ERROR Compressor Temp. Error (L1) (L2) (L3) (L4) (L5) (L6) MODE Economy lamp : Continuous flash.
  • Page 83 Trouble shooting 39 Indicate or Display: Outdoor unit : OUTDOOR UNIT Error Method: PUMP PEAK POWER Indoor Unit : Operation lamp: 10 time Flash, DOWN NOISE ERROR (L1) (L2) (L3) (L4) (L5) (L6) MODE Timer lamp: 5 time Flash Low Pressure Error Economy lamp : Continuous flash.
  • Page 84 Trouble shooting 40 Indicate or Display: Outdoor unit : OUTDOOR UNIT Error Method: PUMP PEAK Indoor Unit : Operation lamp: 8 time Flash, POWER DOWN NOISE ERROR Discharge Pressure Sensor Error Timer lamp: 6 time Flash MODE (L1) (L2) (L3) (L4) (L5) (L6)
  • Page 85 Indicate or Display: Trouble shooting 41 Outdoor unit : OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 8 time Flash, PUMP PEAK POWER DOWN NOISE Timer lamp: 6 time Flash ERROR Suction Pressure Sensor Error MODE (L1) (L2) (L3) (L4) (L5) (L6)

  • Page 86: Trouble Shooting With No Error Code

    2-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 42 1. Power Supply failure 2. External cause Indoor Unit - No Power 3. Electrical Component defect Attention point An indoor unit and an outdoor unit are connected, and a power supply has be connected to an indoor unit. Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable.
  • Page 87 Forecast of Cause: Trouble shooting 43 1. Power Supply failure 2. External cause Outdoor Unit - No Power 3. Electrical Component defect Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable. >>If abnormal condition was found, correct it by referring to Installation Manual or Data &...
  • Page 88 Forecast of Cause: Trouble shooting 44 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 89 Forecast of Cause: Trouble shooting 45 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 90 Forecast of Cause : Trouble shooting 46 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 91: 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 Is there open or loose connection Is there open or loose connection Check if vibration noise by loose bolt or contact noise...
  • Page 92 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) (BLACK) (WHITE) (BLACK) Transistor PCB TM305 TM304 TM303 Transistor PCB BLACK WHITE Compressor (RED) Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
  • Page 93 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector ( Loose connector or open cable ) EXPANSION VALVE COIL BLUE CN116 ORANGE YELLOW WHITE Check Point 3 : Check Noise at start up Check Point 2 : Check Coil of EEV Remove connector, check each winding Turn on Power and check operation noise.
  • Page 94 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 Check resistance when the main power supply is OFF.
  • Page 95 SERVICE PARTS INFORMATION 7 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. Judge the result of as follows: Terminal...
  • Page 96 SERVICE PARTS INFORMATION 8 Thermistor Check Point : Check Thermistor resistance value Remove connector and check Thermistor resistance value. Temperature Resistance Value [ k ] [°C] Thermistor A Thermistor B Thermistor C - 20 105.4 - 10 27.8 58.2 21.0 44.0 168.6 16.1...
  • Page 97 SERVICE PARTS INFORMATION 9 Pressure Sensor 1. High Pressure Sensor Check Point : Check Voltage from Main PCB With the connector connected to the PCB, measure the voltage between CN118:2-3 of the Main PCB. CN118 PRESSURE WHITE SENSOR BLACK (HIGH) Characteristics of pressure sensor Pressure [MPa] 2.

  • Page 98: Appending Data

    R410A Compact cassette / cassette Slim Duct / DUCT Floor/Ceiling / Ceiling type SIMULTANEOUS MULTI 3 . APPENDING DATA...

  • Page 99: Function Setting

    3-1. FUNCTION SETTING 3-1-1 INDOOR UNIT ( For AR type) 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 100 Heater room temperature correction Depending on the installed environment, the room temperature sensor may require a correction. The settings may be changed as shown in the table below. Factory setting) Setting Description Function Number Setting Value Standard Slightly warmer control Lower control Warmar control When using floor console installation, change the setting value to “01”.
  • Page 101 3-1-2 INDOOR UNIT ( For AU type) 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 102 Cooler room temperature correction Depending on the insralled environment, the room temperature sensor may require a correction. The settings may be selected as shown in the table below. Factory setting) Setting Description Function Number Setting Value Standard Slightly lower control Lower control Warmar control Heater room temperature correction...
  • Page 103 3-1-3 INDOOR UNIT ( For AB type) 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 104 Auto restart he following settings are also possible, depending on the operating conditions. Factory setting) Setting Description Function Number Setting Value Please do not change to AUTO RESTART "01" when you want to manage it centrally. 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 105 3-1-4 PROCEDURES TO CHANGE THE FUNCTION SETTING 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.
  • Page 106 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.
  • Page 107 Perform the setting during the operation is stopped. When [Menu button] is pressed twice while “Monitor” screen is dis-played, it switches to the “Submenu” screen. If [Menu button] is pressed while the “Submenu” screen is displayed, the display returns to the “Monitor” screen. Submenu Mo 10:00 Date and time...
  • Page 108 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.

  • Page 109: External Input And Output

    3-2. EXTERNAL INPUT AND OUTPUT CN71 Rotary switch (Drain pump) (Float switch) CN47 (External out) (Remote sensor) CN65 (External in/out PCB) Fig. External input and output PCB CN48 (IR receiver) Fig. Indoor unit PCB Terminal (External in) External Input External input External output Connector Input select connect kit signal...
  • Page 110  External input and output PCB The indoor unit Operation/Stop can be set by using the input terminal on the PCB.  Input select Use either one of these types of terminals according to the application. (Both types of terminals cannot be used simultaneously.) •...
  • Page 111 3-2-2. External output Use an external output cable with appropriate external dimension, depending on the number of ca- bles to be installed.  Indoor unit • A twisted pair cable (22AWG) should be used. Maximum length of cable is 25 m. •...
  • Page 112 3-2-3. Combination of external input and output By combining the function setting of the indoor unit and rotary switch setting of the External input and output PCB, you can select various combinations of functions. Combination examples of external input and output are as follows: External input External Function...
  • Page 113 3-2-4. Details of function  Control input function  When function setting is "Operation/Stop" mode 1 • In the case of "Edge" input Rotary SW of Function External input and External input Input signal Command setting / output PCB Off → On Operation Input of indoor unit Terminal...
  • Page 114  When function setting is "Forced stop" mode • In the case of "Edge" input Rotary SW of Function External input and External input Input signal Command setting / output PCB Off → On Forced stop Input of indoor unit Terminal On →...
  • Page 115  When function setting is "Operation/Stop" mode 2 • In the case of "Edge" input Rotary SW of Function External input and External input Input signal Command setting / output PCB Off → On Operation Input of indoor unit Terminal Stop (R.C.
  • Page 116  Forced thermostat off function Function Rotary SW of External External input Input signal Command setting / input and output PCB 60-00 / 2 Thermostat Off →On 60-09 / B External input and output Input 1 60-10 / C Normal On →...
  • Page 117  Error status Function Rotary SW of External Output External output Command setting / input and output PCB signal Low → High Error 60-09 / B Output of indoor unit CN47 High → Low Normal Off → On Error 60-00 / 2 Output 1 On →...
  • Page 118  External heater output Function Rotary SW of External Output External output Command setting / input and output PCB signal Low → High Heater on 60-11 / D Output of indoor unit CN47 High → Low Heater off 60-00 / 2 Off →...
  • Page 119 3-3-17,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Sep. 2017 Printed in Japan...

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