Carrier 40MAHB Series Service Manual page 21

40MAHB: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
The Outdoor Fan Speed is Operating Outside of Normal Range (EC07)
Description: When the outdoor fan speed remains too low or too high for a certain time, the LED displays the failure code and the AC turns off.
Recommended parts to repair:
• Connection wires
• Fan assembly
• Fan motor
• Outdoor main PCB
Troubleshooting
Power off. After two minutes turn the unit on.
Check the fan motor wiring.
Measure the fan motor voltage
for the fan motor from the PCB.
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.
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
Is it within
normal parameters?
YES
Replace the fan motor.
NO The unit is operating normally.
NO Find the cause of the problem and resolve it.
Ensure the proper connections.
NO Replace the outdoor main PCB.
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