4. Service procedures
18)Symptom: LCD on the remote controller displays “CHECK H01, H02, H03”. (compressor current detection)
*Please check the related part described in the following chart after confirming the code setting (S4) of the outdoor unit’s capacity on the PCB in the outdoor unit.
Start
“CHECK H01” display
Compressor overload detection
•Insufficient voltage
•Comp. motor magnetic contactor defect
•Refrigerant
“CHECK H02” display
Compressor lock detection
Compressor lock
“CHECK H03” display
Compressor current detection circuit defect
•L3 phase wire disconnected
•Comp. motor magnetic contactor defect
•Outdoor unit PCB defect
0346_M_I
19)Check the indoor unit (When the alarm of communication failure is not activated)
●If the electronic control valve failure occurred in Flexible Combination system (simultaneous operation system), one indoor unit would not be operated normally, then the other units won’t be operated either. Due to this, try to detect the troubled unit and correct it.
4
Operate the unit in cooling mode.
(30 minutes after its operation)
•Cooled air comes out.
•Is the temperature of each indoor coil sensor almost the same? (Refer to the sensor temperature display function of the remote controller.)
No
Yes
Normal
• Does each indoor coil sensor detect the temperature | Yes |
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Failure in the electronic | |||||
correctly? (Is there any leakage from the pipe of the |
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| control valve activation. | |||
temperature detection section?) |
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| No |
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Replace the sensor.
0460_M_I
SM830082
IV - 18
