43
7.12 Tracing Element Faults
PROCEDURE:
If the element does not turn off (element run-away)
Note: In normal operation the element will cycle (turn on & off) when the cavity temperature has
reached the set point. This can be detected by listening for the switching noise of the element relay
switch on the power module or using a current meter.
1. Check the temperature sensor is reading the correct temperature by using a digital thermometer,
or check the resistance of the sensor, (refer section 4.8)
2. If the correct temperature is being read, isolate the supply and check that all the elements are
wired correctly and the element relay switches haven’t short-circuited at the power module.
•
Replace the power module.
If the element does not heat up
Note: Before testing refer to section 4.24 to find out which elements are used for each oven mode.
1. Check for a tripped thermal limiter. (refer sections 4.16 & 7.14)
2. Test the element operation in Technician Mode. (refer to Diagnostics Section 6)
3. If the element does not heat up in Technician Mode, test the resistance of the element. The
appropriate range of resistance for each element is given in Table below. Replace the
element if its resistance is outside the given range.
Elements Min Resistance Max Resistance
Upper Inner 18 22
Upper Outer 36 42
Lower 36 42
Fan 21 25
4. Check the continuity of the element wiring back to the power module, including the thermal
limiters.
5. If the wiring continuity is good, it is likely that the element is not faulty.
•
Replace the power module.
7.13 Tracing Oven Temperature Faults
PROCEDURE:
1. Check the correct temperature scale (Deg C or Deg F) is being used, refer section 5.6 User
Preference Setting.
2. Check the correct oven function is being used.
3. Check the door switch is operating correctly, refer to 7.15.
3. Check the temperature sensor resistance, refer to section 4.8
•
Replace the temperature sensor if outside it’s range.
4. Replace the power module if temperature sensor readings are correct.
To Next Page
Loading...
