Computer Control Models Only - Vulcan-Hart VC4G Service Manual

VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - TROUBLESHOOTING
SYMPTOMS
Excessive or low heat.
Mechanical Timer inoperative or not functioning properly.
Cook mode OK, no Hold mode. (Cook & Hold models
only).
Component cooling Fan does not run.
Uneven Cooking.
Intermittent problems.
No power to temperature control.
SYMPTOM
Oven does not heat.
High limit thermostat shutting off gas burner.

COMPUTER CONTROL MODELS ONLY

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POSSIBLE CAUSES
1. Temperature probe malfunction on models
HGC5/5X. (Thermostat malfunction on models
DGC5)
2. Temperature control board malfunction.
3. Gas pressure Insufficient.
4. Gas orifice plugged or obstructed.
1. Interconnecting wiring malfunction.
2. Line voltage incorrect.
3. Timer malfunction.
1. Cook and Hold switch (S3) malfunction.
2. R2 hold relay malfunction.
3. Cook & Hold timer malfunction.
4. Interconnecting wiring malfunction.
1. Motor inoperable.
2. Interconnecting wiring malfunction.
1. Convection Fan motor speed/direction.
2. Poor combustion.
A. Gas pressure incorrect.
B. Exhaust vent plugged or obstructed.
C. Snorkel Vent plugged or obstructed.
3. Air flow Baffles missing or damaged.
1. High ambient temperatures.
2. Wiring connections loose.
3. Cooling fan malfunction.
1. Power switch (S1) in "Cool Down".
2. Door or door switch open.
POSSIBLE CAUSES
1. High limit switch open.
2. Probe malfunction.
3. Control malfunction.
1. Probe malfunction.
2. Control malfunction.
F24682 Rev. D (1016)