Carrier 40VM Series Service Manual

69
E6: CHECK DC FAN ERROR 2
1. Error display:
IDU display: E6
2. Applicable models:
40VMV (Vertical AHU)
3. 3. Error definition:
DC fan error in IDU -- No fan is detected on the main board
4. Possible causes:
• The line from main board to fan motor is loose, disconnected, or improperly connected
• Damaged fan motor
• Damaged main board of indoor unit
Power off
Power on
Is the blower wheel stuck?
Make sure the IDU power supply is correct
Check whether the communication wire is
disconnected or loosened from main control board to
the motor
Check whether the power voltage (AC208/230V)
between the red and black lines on the P1 and P2
terminals of main board are correct.
Check whether the DC12V power between the red
and black lines on the CN31 terminal of main
board of IDU are correct.
Replace
the motor
Replace the main
board for IDU, and check whether
the system operates normally
Connect the spare motor to CN24
terminal of main board. Power on and operate at low speed
Test whether the system operates normally
Replace the main
board of IDU
Replace the main
board of IDU
Apply the proper
power supply
Reconnect the motor
and power on. Is E6 error
eliminated?
Connect the wire
Remove obstacles
YES
NO
Error
resolved
Error
resolved
YES
NO
NO
NO
YES
NO
NO
YES
YES
YES
NO
YES
Without a special motor

Carrier 40VM Series Specifications

General

Brand	Carrier
Model	40VM Series
Category	Air Conditioner
Language	English