8.2. (Troubleshooting) Other problems
SYMPTOM
CAUSE
CORRECTIONS
1. Oven is dead.
1. Open or loose lead wire harness
Fuse is OK.
2. Open thermal cutout / thermistor
Check thermal cutout is defective.
No display and no operation at all.
3. Open low voltage transformer
4. Defective DPC
2. No display and no operation at all.
Fuse is blown.
1. Shorted lead wire harness
Check adjustment of primary, secondary
interlock switch and interlock monitor switch
including door.
2. Defective primary interlock switch
3. Defective interlock monitor switch (NOTE 1)
4. Defective Inverter Power Supply (U)
NOTE 1:
Replace components (primary interlock switch, interlock monitor switch and power relay RL1).
Also replace the secondary interlock switch when the continuity check reads shorted contacts.
3. Oven does not accept key input
(Program)
1. Key input is not in proper sequence
Refer to operation procedure.
2. Defective DPC or defective membrane switch Refer to DPC troubleshooting.
4. Fan motor turns on when oven is
plugged in with door closed.
1. Misadjustment or loose wiring of secondary
interlock switch
Adjust door and interlock switches.
2. Defective secondary interlock switch
3. Door switch CN4
5. Timer starts count down but no
microwave oscillation.
(No heat while oven lamp and fan
motor turn on)
1. Off-alignment of primary interlock switch
Adjust door and interlock switches.
2. Open or loose connection of high voltage
circuit especially magnetron filament circuit
NOTE:
Large contact resistance will cause lower
magnetron filament voltage and cause
magnetron to have lower output and/or be
intermittent.
3. Defective high voltage component
H.V. Inverter Power Supply (U)
Magnetron
Check high voltage component according to
component test procedure and replace if it is
defective.
4. Open or loose wiring of power relay RL1
5. Defective primary interlock switch
6. Defective DPC or power relay RL1
Refer to DPC troubleshooting
6. Oven can program but timer does not
start countdown.
1. Open or loose wiring of secondary interlock
switch
2. Off-alignment of secondary interlock switch
3. Defective secondary interlock switch
7. Microwave output is low. Oven takes
longer time to cook food.
1. Decrease in power source voltage
Consult electrician
2. Open or loose wiring of magnetron filament
circuit.(Intermittent oscillation)
3. Aging change of magnetron
8. Fan motor turns on and turntable
motor rotates when door is opened.
1. Low voltage transformer on DPC.
9. Oven does not operate and return to
plugged in mode as soon as [Start]
pad is pressed.
1. Defective DPC
Check grounding connector on escutcheon
base.
10. Loud buzzing noise can be heard.
1. Loose fan and fan motor
11. Turntable motor does not rotate.
1. Open or loose wiring of turntable motor
2. Defective turntable motor
12. Oven stops operation during cooking.
1. Open or loose wiring of primary and
secondary interlock switch
Adjust door and interlock switches.
2. Operation of thermal cutout
21
NN-SE795S / NN-ST785S / NN-ST775S / NN-ST765S / NN-SD765S / NN-SD755S
Содержание NN-SE795S
Страница 2: ...2 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 3: ...3 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 5: ...1 SCHEMATIC DIAGRAM 5 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 28: ...9 EXPLODED VIEW AND PARTS LIST 9 1 EXPLODED VIEW 28 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 39: ...39 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 40: ...40 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 41: ...10 2 SCHEMATIC DIAGRAM NN ST785S ST775S ST765S 41 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 42: ...42 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 43: ...10 3 SCHEMATIC DIAGRAM NN SD765S SD755S 43 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
Страница 44: ...44 NN SE795S NN ST785S NN ST775S NN ST765S NN SD765S NN SD755S...
