Hitachi Air Conditioning Error Codes


ALARM CODES
If a Safety Device is activated, cutting out the compressor, the Run light on the Remote Control switch blinks continuously and ABNML is indicated on the LCD display.

01 Indoor Unit- Tripping of Protection Device- Failure of Fan Motor, Drain Discharge, PCB, Relay

02 Outdoor Unit- Tripping of Protection Device- Activation of PSH

03 Transmission -Abnormality between Indoor (or outdoor) and Outdoor (or Indoor)-

Incorrect Wiring. Failure of PCB. Tripping of Fuse. Power Supply OFF.

04 Inverter- Abnormality between Inverter and Control PCB- Failure in Transmission between PCBs

05 Transmission- Abnormality of Power Source Wiring -Reverse Phase Incorrect Wiring

06 Voltage Drop -Voltage Drop by Excessively Low or High Voltage to Outdoor Unit-

Voltage Drop of Power Supply, Incorrect Wiring or Insufficient Capacity of Power Supply Wiring

07 Cycle-Decrease in Discharge Gas Superheat -Excessive Refrigerant Charge, Expansion Valve Open Lock

08 Cycle-Increase in Discharge Gas Temperature- Insufficient Refrigerant. Ref. Leakage,

Clogging or Expansion Valve Close Lock.

09 Outdoor Unit- Tripping of Protection Device- Failure of Fan Motor

11 Inlet Air Thermistor-Failure of Thermistor, Sensor, Connection

12 Outlet Air Thermistor-Failure of Thermistor, Sensor, Connection

13 Freeze Protection Thermistor-Failure of Thermistor, Sensor, Connection

14 Gas Piping Thermistor-Failure of Thermistor, Sensor, Connection

19 Tripping of Protection Device for Fan Motor -Failure of Fan Motor

21 High Pressure Sensor-Failure of Thermistor, Sensor, Connection

22 Outdoor Air Thermistor-Failure of Thermistor, Sensor, Connection

23 Discharge Gas Thermistor on Comp.-Failure of Thermistor, Sensor, Connection

24 Evaporating Thermistor-Failure of Thermistor, Sensor, Connection

29 Low Pressure Sensor-Failure of Thermistor, Sensor, Connection

30 * Incorrect Wiring Connection- Incorrect Wiring Connection between Outdoor Unit,-

CH Unit and Indoor Unit

31 Incorrect Setting of Outdoor and Indoor Unit- Incorrect Setting of Capacity Code.

32 Abnormal Transmission of Other Indoor Unit-Failure of Power Supply, PCB in Other Indoor Unit.




Failure of Other Indoor Unit of the Same Refrigerant Cycle.

35 Incorrect Setting in Indoor/Outdoor Unit No.- Existence of the same Indoor Unit No.

in the same refrigerant cycle.

38 Abnormality of Protective Circuit in Outdoor Unit- Failure of Indoor Unit PCB. Incorrect Wiring

Connection to PCB in Outdoor Unit

39 Abnormality of Running Current at Constant Compressor- Overcurrent, Melted Fuse of-

Failure of Current Sensor

43 Pressure Ratio Decrease Protection Activating- Failure of Compressor, Inverter

44 Low Pressure Increase Protection Activating- Overload to Indoor in Cooling, High Temperature of-

Outdoor Air in Heating Expansion Valve Open Lock

45 High Pressure Increase Protection Activating -Overload Operation. Excessive Refrigerant-

Clogging of Heat Exchanger

46 High Pressure Decrease Protection Activating- Insufficient Refrigerant

47 Low Pressure Decrease Protection Activating- Insufficient Refrigerant.

Expansion Valve Close Lock. Refrigerant Leakage.

51 Abnormality of Current Sensor for Inverter- Failure of Sensor on Inverter PCB

52 Overcurrent Protection Activating- Overload, Overcurrent, Locked to Compressor

53 IPM Protection Activating- Automatic Stoppage of IPM (Overcurrent, Low Voltage or Overheating)

54 ** Increase in Inverter Fin Temperature- Abnormal Inverter Fin Thermistor,-

Abnormal Outdoor Fan

56 ** Abnormality of Detection for Fan Motor Position- Abnormal Detection Circuit of Transmission

57 ** Fan Controller Protection Activating- Abnormal Fan Speed

58 ** Abnormality of Fan Controller- Overcurrent, Abnormal Fan Controller Fin

59 AC Chopper AC Chopper Circuit Protection- Failure of FET, Power Supply, CT for Fan Motor

EE Compressor Compressor Protection- 3 Time Occurrence of Alarm Giving Damage to Compressor within 6 hours

dd *** Transmission Incorrect Wiring between Indoor Units- Incorrect Wiring between Indoor Units and Remote

Control Switch

* : For only FXG and FX3 series. Other code Nos. are common with FSG and FS3 series.

** : For only 24, 30FSG1/FSG5 (220V 60Hz), *** : In case of PC-2H2

Failure of Thermistor, Sensor, Connection


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7 Responses to Hitachi Air Conditioning Error Codes

  1. RAMESH PATEL says:

    Samsung and l g A c coil indoor
    Ice making pb but machine is clean gas is ik but sime tume this pb

  2. amanulla says:

    Aman

  3. chris hebda says:

    workin on a ras12 master and ras10 slave.
    getting a b0 alarm on remote and condensor screen. cant find nothing in service manual and technical havent seen a b0 or 60 alarm code before?

  4. Omprakash says:

    E1 error

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