H4-72-02-03
12
For internal use only
5.5
Checking the hot-air fan motor
1. Disconnect the power supply cables from the motor.
2. Measure the resistance of the motor winding when cold.
Normal: 150
Ω
- 200
Ω
Fault:
Low
Ω
reading or
∞
5.6
Checking the antenna motor
3. Disconnect the power supply cables from the motor.
4. Measure the resistance of the motor winding when cold.
Normal: 150
Ω
- 200
Ω
Fault:
Low
Ω
reading or
∞
5.7
Checking the magnetron, cross-flow and vapour filter
5. Disconnect the power supply cables from the motor.
6. Measure the resistance of the motor winding when cold.
5.7.1
Magnetron fan
Normal: 200
Ω
- 200
Ω
Fault:
Low
Ω
reading or
∞
5.7.2
Cross-flow fan
Normal: 1 - 2: 150
Ω
- 200
Ω
1 - 3: 170
Ω
- 190
Ω
2 - 3: 70
Ω
- 90
Ω
-
Fault:
Low
Ω
reading or
∞
5.7.3
Vapour fan
Normal: 2 - 3: 610
Ω
- 630
Ω
2 - 4: 350
Ω
- 370
Ω
3 - 4: 240
Ω
- 260
Ω
-
Fault
Low
Ω
reading or
∞