The Indoor Fan Speed Is Operating Outside Of The Normal Range - Carrier 38MARB Service Manual

38MARB: Service Manual
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
Turn the power off. Wait 2 minutes, then restart.
Check the fan motor wiring.
the fan motor from the PCB.
Is it within normal parameters?
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Does a problem remain?
YES
Shut off the power supply.
Rotate the fan by hand.
Does it turn easily?
YES
Is it improperly wired?
YES
Measure the voltage for
YES
Replace the fan motor.
NO The unit is operating normally.
NO
Find the cause of the problem and resolve.
Ensure the connections are good.
NO Replace the indoor main PCB.
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