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7.9 Tracing Cooling Fan Faults
PROCEDURE:
If the cooling fan will not start
1. Enter technician diagnostic mode to test the cooling fan operation. (refer section 6 on page 32)
•
The cooling fan will operate at low speed in normal operation. When the cooling fan is
turned on in diagnostics it will run at high speed.
2. Test for the correct voltage across the cooling fan contacts. Replace the fan if tests are good.
3. If no power, check the fan wiring continuity back to the power module.
•
If the wiring continuity is good then it is likely that the cooling fan is not faulty.
4. Replace the power module.
If the cooling fan will not turn off
1. Check for temperature sensor faults. (refer to Section 7.13)
•
The cooling fan will operate at low speed until the cavity temperature is below 150°C
(300°F). If the cavity temperature is above 270°C (520°F) the cooling fan will operate at
high speed.
2. Replace the power module if no other component faults can be found.
7.10 Tracing Cavity Fan Faults
PROCEDURE:
If oven cavity fan will not operate
1. Enter technician diagnostic mode to test the oven cavity fan operation. (refer to section 6, page 32)
2. If the oven cavity fan operates in diagnostics but not in normal operation. Check for door switch
faults. (refer to Section 7.15)
3. If the door switch is OK, and cavity fan not operating, test for 220/240volts across fan contacts. If
voltage at fan contacts but not operating, replace the cavity fan.
4. If no voltage, check the continuity of the fan wiring circuit back to power module including thermal
limiters.
5. If the wiring continuity is good, then it is likely that the oven cavity fan is not faulty. Replace the
power module.
If the oven cavity fan will not turn off
1. Replace the power module if no other component faults can be found. The cooling fan
relay may be faulty.
7.11 Tracing Light Faults
PROCEDURE:
If light bulb is not working
1. Replace halogen bulb. (refer to Section 8.12)
If all the lights will not turn on or replacing the bulb/s did not fix the problem.
1. Check for 12VAC to lamp assemblies from the transformer.
•
Replace the lamp assembly if there is voltage present but light still not operating. (refer to
Section 8.13)
2. If no power, check the supply voltage from power module to the transformer.
•
Replace the power module if no voltage supplied to transformer. (refer section 8.6)
If the lights do not turn off
1. Check to see if the door switch is faulty.
•
If the faulty door switch cannot be easily repaired, replace the door lock assembly.
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