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E6: CHECK DC FAN ERROR 1
1. Error display:
IDU display: E6
2. Applicable models:
40VMM, 40VML, 40VMW, 40VMF, 40VMC, 40VMU, 40VMR, 40VMI
3. Error definition:
DC fan error in IDU -- No fan is detected on the main board, and specific speed difference exists between actual speed and
target speed.
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 board to the motor
Check whether the DC310V power between
the red and black lines on the CN24 terminal of main board
of IDU are correct. Check whether the DC15V power between the
black and white lines on the CN24 terminal of main board
of IDU are correct.
Replace
the motor
Replace the main
board of IDU, and check whether
the system operates normally
Error
resolved
Error
resolved
Replace the main
board of IDU
Connect the special motor* to CN24
terminal on main board. Power on and operate at low speed.
Test whether the system operates
normally.
Replace the main
board of IDU
Reconnect the previous motor
and power on. Is the
E6 fault eliminated?
Reconnect the wire
Remove obstacles
Apply the proper
YES
YES
NO
NO
NO
YES
NO NO
YES
YES
YES
YES
NO
without a special motor.
NO
power supply
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