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OV500 SERIES RACK OVEN - TROUBLESHOOTING
OVEN TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSES
Oven completely inoperative. No display on
control.
1. Facilities main circuit breaker open.
2. Controller inoperative.
3. Controller membrane inoperative.
4. Back-up control switch on. (If applicable)
Oven does not operate. Display lit or display
flashing and oven cavity lights on.
1. Door open.
2. High limit thermostat open.
3. Hood pressure switch open.
4. Incorrect wiring.
Oven does not operate. Display shows Shdn
(shutdown) in the bake timer display and flashes
the Oven Temp display while alarm sounds.
1. Oven in Oven Temperature Safety Alarm Mode.
Temperature at the temperature probe between 570EF.
to 600EF. (299 to 316EC.) for ten seconds. Remove
120VAC supply power to the oven.
Oven does not operate. Erratic display. 1. E-prom chip malfunction.
2. Controller malfunction.
Rack does not lift when bake cycle is initiated. 1. Lift motor or OL2 open.
2. Door open or door switch malfunction.
3. Controller malfunction.
4. Mechanical bind due to actuator or lift shaft.
5. LS1 inoperative.
Rack does not turn when bake cycle is operating. 1. Rotator motor malfunction or OL2 open.
2. Door open or door switch malfunction.
3. Controller malfunction.
4. Mechanical bind due to rack or chain.
5. LS1 inoperative.
F25361 (January 2010)
Page 55 of 60