Amana RFS18MPS Service Manual page 16

Troubleshooting Procedures (Electronic Models)
Trouble 5: No microwave oscillation even when oven light and fan motor operate.
No microwave
oscillation.
Operates at
full power
when
programmed
for lower
power.
16
Disconnect wire
leads from relay
RY2 and verify
continuity of the
relay.
Check high
voltage
transformer.
Check high
voltage capacitor.
Check high voltage
diode.
Check magnetron.
Disconnect wire
leads from relay
RY2 and verify
continuity of the
relay.
No
Failed
Continuity
controller.
Continuity
Abnormal
Failed high
voltage
transformer.
Normal
Failed high
Abnormal
voltage
capacitor.
Normal
Failed high
Abnormal
voltage
diode.
Normal
Abnormal Failed
magnetron.
Failed
Abnormal
controller.
16026795
Replace
controller.
Replace high
voltage
transformer.
Replace high
voltage capacitor.
Replace high
voltage diode.
Replace
magnetron.
Replace
controller.
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