Carrier 40MBFAQ Service Manual

40MBFAQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
18
DIAGNOSIS AND SOLUTION (CONT.)
EH 03/EH 31/EH 32/EC 07 (Fan Speed Is Operating Outside of Normal Range Diagnosis and Solution)
Description: When the indoor / outdoor fan speed remains too slow or too fast for a certain amount of time, the unit ceases
operating and the LED displays the failure.
Recommended parts to prepare:
• Connection wires
• Fan assembly
• Fan motor
•PCB
Troubleshooting
NOTE: For certain models, the outdoor PCB cannot be removed separately. In this case, the outdoor electric control box should be replaced
as a whole.
YES
Power o then restart the unit after 2 minutes.
Is it within normal parameters?
Replace the fan motor.
Does a problem remain?
The unit is operating as designed.
NO
Shut o the power supply , Rotate
the fan by hand .
YES
Does it turn easily?
Identify the problem and resolve.
NO
Check the fan motor wiring.
YES
Is it improperly wired?
Ensure proper connections.
Measure the voltage for
the fan motor from the PCB.
YES
Replace the main PCB.NO

Carrier 40MBFAQ Specifications

General

Brand	Carrier
Model	40MBFAQ
Category	Heater
Language	English