Computer Control Models Only; Vulcan - Vulcan-Hart VC4EC Service Manual

FULL SIZE ELECTRIC CONVECTION OVENS - TROUBLESHOOTING
SYMPTOMS
No power to oven controls.
No heat, convection fan motor runs.
No power to temperature control.
Door does not seal or shut properly
SYMPTOM
Oven does not heat.
High limit thermostat shutting OFF heat.
Oven not hot enough.
Blower motor doesn't run with power
switch in "ON" or "COOL DOWN" position.

COMPUTER CONTROL MODELS ONLY

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POSSIBLE CAUSES
1. Main circuit breaker OPEN.
2. Control circuit fuses OPEN.
3. Power switch (S1) inoperative.
4. Transformer (T2) inoperative (480V only).
1. High limit thermostat OPEN.
2. Heating element malfunction.
3. Contactor malfunction.
4. Temperature control malfunction.
1. Power switch (S1) in "Cool Down".
2. Door or door switch open.
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.
POSSIBLE CAUSES
High limit switch open.
Temperature probe malfunction.
Computer control malfunction.
Temperature probe malfunction.
Computer control malfunction.
Temperature probe malfunction.
Computer control range high (rH1) setting to low. See
SETUP MODE under COMPUTER CONTROL.
Computer control malfunction.
Line voltage incorrect.
Power switch (S1) malfunction.
Fan speed switch (S3) malfunction.
Solid sate relay (SSR) malfunction. See SOLID STATE
RELAY TEST under COMPUTER CONTROL.
Interconnecting wiring malfunction.
Motor inoperative.
Computer control malfunction. See COMPUTER CONTROL
OPERATIONAL TEST.
F25105 (Rev. A, October 2007)