10.3.3.6 Outdoor fan speed has been out of control or compressor speed has been out of control
(ODU E8/EC 07)
Over current failure of outdoor DC fan motor (ODU EC71)
Check the compressor
resistance values.
Are they within
acceptable parameters?
Replace the compressor.
YES
YES
Power off, then restart the unit after 2
minutes.
Is it within normal parameters?
Replace the fan motor
Does a problem remain? The unit is operating normallyNO
Shut off the power supply,
Rotate the fan by hand.
YES
Does it turn easily? Find the cause of the problem and resolve itNO
Check the wiring of fan motor.
YES
Is it improperly wired?
Ensure proper connections
Measure the voltage for
the fan motor from the PCB.
YES
Replace the outdoor main
PCB
NO
YES
Replace the DC fan IPM board (if
has)
Does a problem remain?
YES
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