COMFORT-AIRE Century VMH-SV Series Service Manual page 128

TS04-ODU: The outdoor fan speed is operating outside of normal range diagnosis and
solution)
Description: When outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code
and the AC turns off.
Recommended parts to prepare:
• Connection wires
• Fan assembly
• Fan motor
• Outdoor main PCB
Troubleshooting and repair:
Power off, then restart the unit after 2 minutes.
Does a problem remain?
Shut off the power supply, Rotate
Check the wiring of fan motor.
Is it improperly wired?
Measure the voltage for
the fan motor from the PCB.
Is it within normal parameters?
Replace the DC motor driver board
Replace the fan motor
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.
YES
the fan by hand.
Does it turn easily?
YES
YES
YES
(if has)
 Troubleshooting
Troubleshooting
NO The unit is operating normally
NO Find the cause of the problem and resolve it
Ensure proper connections
NO
Replace the outdoor main PCB
