Century COMFORT-AIRE VMH-SG Series Service Manual page 91

Service Manual - VMHxxSG
TS04-S-IDU: The Indoor fan speed is operating outside of normal range diagnosis and
solution)
Description: When indoor 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
• Indoor 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.
Measure the voltage for
the fan motor from the PCB.
Is it within normal parameters?
YES
the fan by hand.
Does it turn easily?
YES
Is it improperly wired?
YES
YES
Replace the fan motor
 Troubleshooting
NO The unit is operating normally
NO Find the cause of the problem and resolve it
Ensure proper connections
NO Replace the indoor main PCB

Troubleshooting