ACP Menumaster DEC21E2, Service Manual

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35
Troubleshooting
Cook Condition
Display starts counting down.
Yes
Place cup of water in
oven and close oven door.
Open oven door, water is properly heated?
Beep not programmed into oven.
Pad not programmed.
Inoperative touch panel. 1.
2.
3.
NO
NO
Yes
Push pad number 1.
Pad beeps when pushed?
Inoperative control board.
4.
Heats very slowly.
NOTE
: Verify by performing power test.
One inoperative diode.
One inoperative capacitor.
One inoperative magnetron.
Broken or improper wire connection. 1.
2.
3.
4.
No heat.
Inoperative triac.
Inoperative diodes.
Inoperative capacitors.
Inoperative control board.
1.
2.
3.
5.
6.
Inoperative high voltage transformer. 4.
Oven is operating properly.
NOTE: Shut down after cook cycle - door closed - factory preset at 60 seconds, but can be changed with user options.
Shut down, door open - approximately 2 minutes.
After shut down, display goes blank.
Display
Display
Broken or improper wire connections. 7.
Inoperative or misadjusted interlock switch assembly. 5.
Inoperative or misadjusted interlock switch assembly.
Broken or improper wire connections.
5.
Display counting down to "0" and
beep sounds.
Yes
Magnetron TCO opened in mid-cycle
Logic switch opened in mid-cycle
1.
2.
NO
Symptoms of the above are as follows:
- Countdown time stops and remains displayed.
- "POWER" indicator disappears.
- "READY" indicator is displayed.
- Blower and antenna motors and light continue to operate.
Yes
After 2 minutes, all functions stop and the display goes blank.
After TCO or switch resets:
- "READY" indicator is displayed.
- Blower and antenna motors and light operate for 2 minutes.
Primary switch opened in mid-cycle
3.
Inoperative control board.
4.
1