Sanyo KH2442 / CH2442 Service Manual page 174

18) Symptom: LCD on the remote controller displays "CHECK H01, H02, H03".
* 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.
Section
Compressor overload
detection
1
• Insufficient voltage
• Comp. motor magnetic contactor
defect
• Refrigerant over-charged
2
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
3
correct it.
4
(compressor current detection)
Start
"CHECK H01" display
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.)
• Does each indoor coil sensor detect the temperature
correctly? (Is there any leakage from the pipe of the
temperature detection section?)
Replace the sensor.
"CHECK H02" display
Compressor lock detection
Compressor lock
No
No
IV - 18
4. Service procedures
"CHECK H03" display
Compressor current detection
circuit defect
• L3 phase wire disconnected
• Comp. motor magnetic contactor
defect
• Outdoor unit PCB defect
Yes
Normal
Yes
Failure in the electronic
control valve activation.
0346_M_I
0460_M_I
SM830082