Sanyo KH2442 / CH2442 User Manual download pdf (Page 174)

4. Service procedures

Section

SM830082

IV - 18

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.

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.

Normal

Failure in the electronic

control valve activation.

Replace the sensor.

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?)

Yes

0460_M_I

0346_M_I

“CHECK H02” display

Compressor lock detection

• Insufficient voltage

• Comp. motor magnetic contactor

defect

• Refrigerant over-charged

Start

Compressor lock

“CHECK H01” display

Compressor overload

detection

• L3 phase wire disconnected

• Comp. motor magnetic contactor

defect

• Outdoor unit PCB defect

“CHECK H03” display

Compressor current detection

circuit defect

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Sanyo KH2442 / CH2442 User Manual Page 174

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