Troubleshooting; Ball Models - Vulcan-Hart VC4G Service Manual

VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - TROUBLESHOOTING
power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash
procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout
procedures, attach test equipment and reapply power to test.
SYMPTOMS
Blower motor doesn't run with 1S in "Cool Down" or "On"
position.
Blower motor doesn't run in "On" position. "Cool Down"
functions OK.
Blower motor doesn't run in "Cool Down" position. Runs
OK in "On" position.
Gas does not ignite; No spark; No Ignition Light ON.
Sparks but gas does not ignite.
Gas ignites but will not maintain flame.
F24682 Rev. D (1016)

TROUBLESHOOTING

Certain procedures in this section require electrical test or measurements while

BALL MODELS

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POSSIBLE CAUSES
1. Line voltage.
2. Power switch (S1) malfunction.
3. Switch (S3) malfunction.
4. Interconnecting wiring malfunction.
5. Motor inoperable.
1. Door switch malfunction.
2. Power switch contacts inoperative.
3. Interconnecting wiring malfunction.
1. Power switch malfunction.
2. Interconnecting wiring malfunction.
1. Shorted electrode on ignitor/flame sense.
2. Ignitor cable (high voltage) OPEN.
3. Heat relay (R3) malfunction.
4. Transformer (T1) inoperative.
5. High limit thermostat open.
6. Interconnecting wiring malfunction.
7. Ignition Module malfunction.
1. Gas solenoid valve OFF or inoperative.
2. Manual gas valve CLOSED.
3. Gas supply OFF or Insufficient gas pressure.
4. Interconnecting wiring malfunction.
5. Ignition Module malfunction.
1. Igniter lead connections malfunction.
2. Ignitor ground inoperative.
3. Ignitor/flame sense malfunction.
4. Insufficient gas pressure.
5. Snorkel vent plugged, obstructed or missing.
6. Incorrect polarity from transformer (T1) to Ignition
module.