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19
DIAGNOSIS AND SOLUTION (CONT.)
Fan Speed is Operating Outside of the Normal Range (EH03)
Troubleshooting
Error Code EH03
Malfunction decision conditions
When the indoor fan speed remains too low (300RPM) for a certain period of time, the unit stops and the
LED displays the failure.
Supposed causes
Wiring mistake
Fan assembly faulty
Fan motor faulty
PCB faulty
Power off, then restart the
unit 2 minutes later
Shut off the power supply,
Rotate the fan by hand.
The unit operates normally.
Find the cause and resolve it.
Check the fan motor wiring
No
Yes
No
Correct the connections.
No
No
Replace the fan motor
Yes
Yes
Measure the voltage for the
fan motor from the main
PCB
Yes
Replace the main PCBNo
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