Fan Motor - Bosch AHUW036A2 Service Manual

Fan motor

Remove and assemble the EEV coil
1
Fig. 36 Remove and assemble the EEV coil
[1] Remove
[2] Assemble
[3] A part
7 Fan motor
Checking item
1. The fan motor does not operate.
Does failure appear again when starting
operation?
2. Large vibration of the fan motor.
Table 42 Fan motor check
38
2
3
6 720 817 722-32.1I
Symptom
1. When power supply is abnormal
2. For wrong wiring
6. For failure of motor
7. For failure of circuit board
▶ Grip the A part tightly, and pull coil part upward.
Fig. 37
Countermeasure
• Modify connection status in front or at the
rear of the breaker, or if the power terminal
console are at frosting condition.
• Modify the power supply voltage if it is
beyond specified scope.
-For following wiring
1. Check connection status.
2. Check contact of the connector.
3. Check that parts are firmly secured by
tightening screws.
4. Check connection of polarity.
5. Check short circuit and grounding.
• Measure winding resistance of the motor
coils.
Replace the circuit board in following
procedures if problems occur again when
powering on and if there are no matters
equivalent to items as specified in above 1)
through 4).
Carefully check both connector and grounding
wires when replacing the circuit board.
1. Replace only fan control boards.
If the fan starts, it means that the fan control
board is defect.
2. Replace both fan control board and the main
board.
If the fan starts, it means that the main board
is defect.
Split ODU – 6 720 817 722 (2015/06)