Sanyo SPW-U253GH56 Service Manual page 79

19) Symptom: LCD on the remote controller displays "CHECK H01, H02, H03". (PC
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 over-charged
20) 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.
• 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.)
• Does each indoor coil sensor detect the temperature
correctly? (Is there any leakage from the pipe of the
temperature detection section?)
"CHECK H02" display
Compressor lock detection
Operate the unit in
cooling mode.
(30 minutes after its operation)
No
No
Replace the sensor.
– 79 –
Compressor lock
Yes
Yes
4. Service procedures
"CHECK H03" display
Compressor current detection
circuit defect
• L3 phase wire disconnected
• Comp. motor magnetic contactor
defect
• Outdoor unit PCB defect
0346_M_I
Normal
Failure in the electronic
control valve activation.
0460_M_I
SM830035
4