SG-38MHRC-01 Specifications subject to change without notice. 35
DIAGNOSIS AND SOLUTION (CONT)
The indoor fan speed is operating outside of the normal range (E3/F5)
Description: When the indoor fan speed remains too slow (below 300 RPM) for an extended period of time, the LED displays a failure code
and the unit turns off.
Possible causes:
• Wiring mistake
• Faulty fan assembly
• Faulty PCB
Troubleshooting
YES
Turn the power o. Wait 2 minutes, then restart.
Is it within normal parameters?
Replace the fan motor.
Does a problem remain? The unit is operating normally. NO
Shut o the power supply.
Rotate the fan by hand.
YES
Does it turn easily?
Find the cause of the problem and resolve.
NO
Check the fan motor wiring.
YES
Is it improperly wired?
Ensure the connections are good.
Measure the voltage for
the fan motor from the PCB.
YES
Replace the indoor main PCB.NO
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