Thursday, October 21, 2010

Hitachi Error Codes


10.2 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.
The Unit Identification A* etc is shown along with the Code Number for the Fault that has occurred.
The Code Numbers relating to each type of Fault is shown below.

Heat Pump

Fault Code = 01
Fault = Safety Device (Indoor Unit)

Fault Code = 02
Fault = Safety Device (Outdoor Unit)

Fault Code = 03
Fault = Transmission Indoor/Outdoor Unit

Fault Code = 05 Phase Rotation
Fault =

Fault Code = 08
Fault = Compressor High Temperature

Fault Code = 11
Fault = Air Inlet Thermistor

Fault Code = 12
Fault = Air Outlet Thermistor

Fault Code = 13
Fault = Freeze Protection Thermistor

Fault Code = 20
Fault = Compressor Thermistor

Fault Code = 22
Fault = Ambient Air Thermistor

Fault Code = 24
Fault = Defrost Thermistor

Fault Code = 25
Fault = Condensing Temperature Thermistor

Fault Code = 38
Fault = PCB Protection Circuit

Fault Code = 41
Fault = Overload Operation for Cooling

Fault Code = 42
Fault = Overload Operation for Heating


The LED’s 1-4 on the Outdoor Unit PCB will also light up according to the following table to indicate the fault which has occurred.

Fault Code = Normal
LED1 =
LED2 =
LED3 =
LED4 =

Fault Code = 01
LED1 = *
LED2 =
LED3 =
LED4 =

Fault Code = 02
LED1 =
LED2 = *
LED3 =
LED4 =

Fault Code = 03
LED1 =
LED2 =
LED3 = *
LED4 =

Fault Code = 05
LED1 =
LED2 =
LED3 =
LED4 = *

Fault Code = 08
LED1 = *
LED2 = *
LED3 = *
LED4 =

Fault Code = 20
LED1 = *
LED2 =
LED3 =
LED4 = *

Fault Code = 22
LED1 = *
LED2 = *
LED3 =
LED4 =

Fault Code = 24
LED1 = *
LED2 =
LED3 = *
LED4 =

Fault Code = 38
LED1 =
LED2 = *
LED3 = *
LED4 =

Fault Code = 41
LED1 = *
LED2 = *
LED3 =
LED4 =

Fault Code = 42
LED1 =
LED2 = *
LED3 = *
LED4 = *

Fault Code = 11-13
LED1 = *
LED2 = *
LED3 = *
LED4 = *



Cooling Only

Fault code = 02
Fault = Safety Device (Indoor or Outdoor Unit)

Fault code = 11
Fault = Air Inlet Thermistor

Fault code = 13
Fault = Freeze Protection Thermistor

Fault code = 38
Fault = PCB Protection Circuit

The reason for the failure should be traced and rectified as early as possible. The unit may then be restarted by pressing the Run/Stop button.

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