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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 Fault
0i Safety Device (Indoor Unit)
02 Safety Device (Outdoor Unit)
03 Transmission Indoor/Outdoor Unit
05 Phase Rotation
08 Compressor High Temperature
ii Air Inlet Thermistor
i2 Air Outlet Thermistor
i3 Freeze Protection Thermistor
20 Compressor Thermistor
22 Ambient Air Thermistor
24 Defrost Thermistor
25 Condensing Temperature Thermistor
38 PCB Protection Circuit
4i Overload Operation for Cooling
42 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 LED1 LED2 LED3 LED4
Normal ----
0i ---
*
02 - --
*
03 -- -
*
05 ---
*
08
***-
20 --
* *
22
**--
24 - -
* *
38 -
**-
4i
**--
42 -
***
ii-i3
****
Cooling Only
Fault Code Fault
02 Safety Device (Indoor or Outdoor Unit)
ii Air Inlet Thermistor
i3 Freeze Protection Thermistor
38 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.
41
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