SHARP(CHINA) INVESTMENT CO., LTD
6. DC Over Current Error
No
No
No
Heating mode
error memory isrecorded.
Start
Are valves(2-way and
3-way) close?
Does compressor rotate?
Fully open stop valves
Does compressor rotate more
than 30 seconds?
Check IPM lead
wire.(UVW)
Check IPM short
circuit.
Check compressor
terminal.
Replace PWB
Does compressor
rotate?
Replace Compressor
Modify the connection of compressor
lead wire on PWB.
Replace P WB.
Modify compressor terminal marking.
Yes
Yes
Abnormal
Abnormal
Abnormal
Is IPM PWB floating from the
heat sink?
No
Check the AC power supply
voltage when compressor
rotate.(rated voltage±10%)
normal
normal
normal
No
Cooling mode?
Check outdoor exchanger
termistor and discharge
thermistor.
Modify or replace termistor.
Check indoor exchanger
thermistor and
discharge
thermistor.
Modify or replace termistor.
Check indoor heat
exchanger.
normal
Check outdoor heat
exchanger.
Clean indoor heat
exchanger.
Clean indoor heat exchanger.
Check the refrigerant amount.
Check the discharge pressure. Check the installation condition.
Fix IPM PWB with screws securely.
Yes
Yes
normal
Yes
Abnormal
Abnormal
normal
3-9
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