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FULL SIZE ELECTRIC CONVECTION OVENS - TROUBLESHOOTING
SYMPTOMS POSSIBLE CAUSES
F25105 (December 2001)Page 57 of 60
No power to oven controls. 1. Main circuit breaker OPEN.
2. Control circuit fuses OPEN.
3. Power switch (S1) inoperative.
4. Transformer (T2) inoperative (480V only).
No heat, convection fan motor runs. 1. High limit thermostat OPEN.
2. Heating element malfunction.
3. Contactor malfunction.
4. Temperature control malfunction.
No power to temperature control. 1. Power switch (S1) in “Cool Down”.
2. Door or door switch open.
Door does not seal or shut properly 1. Doors out of adjustment.
2. Door chain out of adjustment or broken
(simultaneous doors).
3. Door catch roller out of adjustment or broken
(independent doors).
4. Door seals damaged.
COMPUTER CONTROL MODELS ONLY
SYMPTOM POSSIBLE CAUSES
Oven does not heat. 1. High limit switch open.
2. Temperature probe malfunction.
3. Computer control malfunction.
High limit thermostat shutting OFF heat. 1. Temperature probe malfunction.
2. Computer control malfunction.
Oven not hot enough. 1. Temperature probe malfunction.
2. Computer control range high (rH1) setting to low. See
"SETUP MODE" under "COMPUTER CONTROL)".
3. Computer control malfunction.
Blower motor doesn’t run with power
switch in “ON” or "COOL DOWN” position.
1. Line voltage incorrect.
2. Power switch (S1) malfunction.
3. Fan speed switch (S3) malfunction.
4. Solid sate relay (SSR) malfunction. See "SOLID STATE
RELAY TEST" under "COMPUTER CONTROL".
5. Interconnecting wiring malfunction.
6. Motor inoperative.
7. Computer control malfunction. See "COMPUTER
CONTROL OPERATIONAL TEST".