John Lewis NN-GT578SBJQ OEM 27L JLFSMWG002, Руководство по обслуживанию

Страница: 19 / 24

19
12.3 Troubleshooting (other problems)
12.4 Troubleshooting the inverter by input voltage
Troubleshooting the Inverter circuit and magnetron
Microwave oven shuts down between 15 - 33 seconds.
If the microwave oven shuts down after a short period of time while operating in micropower mode, conduct the
following test.
The microwave oven must be set in self test mode to activate the self diagnostic failure code system.
When oven is set in test mode, place water load (1Ltr) in the oven, set micropower to high and time for 1 minute,
press start.
H97, H98 appears in the display window for a short time after start key is pressed and there is no microwave oscil-
lation.
Symptom Cause Correction
1. Microwave output is low.
Oven takes a long time to cook food.
1. Decrease in power source volt-
age.
2. Open or loose wiring of magne-
tron filament circuit causing inter-
mittent oscillation.
3. Ageing of magnetron
Consult electrician.
Refer to output test procedures.
Change magnetron
2. Loud Buzzing noise can be heard. 1. Loose fan or fan motor
3. Turntable motor does not rotate. 1. Open or loose wiring of turntable
motor.
2. Defective turntable motor
4. Oven stops operation during cooking
cycle.
1. Open or loose wiring of primary
and secondary latch switch.
Adjust door and latch switches.
5. Oven returns to “plug in” state 9
seconds after the start pad is
pressed in sensor cooking mode.
1. Open steam sensor circuit.
2. Defective steam sensor.
Delay/
S tand
Stop/Cancel
Start
Micro Power