R-7280
R-1720
TROUBLESHOOTING GUIDE (CONT’D)
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE OR
CORRECTION
COOKING CONDITION (CONT’D)
Oven lamp does not light at all.
Cook indicator appears in display but
turntable motor does not operate.
Burned out bulb.
Open wiring to oven lamp socket.
Defective relay RY-1 on control unit.
Turntable motor defective.
Replace oven lamp.
Check and repair wiring.
Procedure J.
Replace motor.
Open or loose wiring between control
unit and motor.
Check and repair wiring.
Oven lamp lights but fan motor
does not operate.
(Turntable motor does operate)
Defective fan motor.
Procedure E.
Open or loose wiring to fan motor.
Check and repair wiring.
Oven does not go into cook cycle
when INSTANT COOK/START
key is touched.
Upper and Lower latch switches and STOP
switch defective or out of adjustment.
Blown Fose
Procedure F.
Procedure I.
I
Defective temp. fuse. (Magnetron and Oven)
I
Procedure G.
1
I
Defective relay RY-1, RY-2 on control unit.
Procedure J.
1
Defective control unit.
Defective key untt.
Open or loose wiring to the above
components.
Defective magnetron.
Defective relay RY-2 on control unit.
Defective power transformer.
Defective rectifier.
Defective high voltage capacitor.
Procedure J.
Procedure J.
Check and repair wiring.
Procedure A.
Procedure J.
Procedure 8.
Procedure C.
Procedure 0.
Oven seems to be operating but
little or no heat is produced in
oven load. (Food incompletely
cooked or not cooked at all at end
of cook cycle)
I t
1
I
I
Defective control unit.
I
Procedure J.
I
Open or loose wiring to the above
components.
Check and repair wiring.
Oven goes into a cook cycle but
extremely uneven heating is
produced in oven load (food).
Turntable motor does not operate.
Replace turntable motor.
Oven does not cook properly when
cooking control set to LOW, MED
LOW, MED, MED HIGH cooking
powers.
(Operates properly on HIGH.)
Defective control unit.
Defective key unit.
Open or loose wiring between the above
components.
Procedure J.
Procedure J.
Check and repair wiring.
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