38MARB: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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DIAGNOSIS AND SOLUTION (CONT)
The indoor fan speed is operating outside of the normal range (EH03)
Description: When the indoor fan speed remains too slow or too fast for an extended period of time, the LED displays a failure code and the unit turns
off.
Recommended parts to repair:
• Connection wires
• Indoor main PCB
• Fan assembly
• Indoor main 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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