Troubleshooting; Gas Heating (Manual Lift Or Motorized Lift Option) - Vulcan-Hart VG30 Service Manual

GAS HEATING (MANUAL LIFT OR MOTORIZED LIFT OPTION)

SYMPTOMS
No spark to ignite pilot burner gas, power on
light is lit.
Spark at ignitor but pilot burner does not light.
Pilot burner lights but will not maintain flame.
Main burner(s) do not light or will not
maintain flame.
Braising pan does not heat, power on light is
lit.
Braising pan does not heat, power on light is
not lit.
Excessive or low heat.
GAS BRAISING PANS - TROUBLESHOOTING

TROUBLESHOOTING

1. Pan not fully lowered or pan position/down limit switch
malfunction.
2. Temperature dial not set to call for heat or temperature
controller malfunction.
3. Ignitor cable open or grounded (short).
4. Ignitor spark gap distance incorrect.
5. Shorted electrode or an improper ground on
ignitor/flame sense.
6. Ignition module not grounded or inoperative.
1. Gas combination valve off or inoperative.
2. Gas supply off or insufficient gas pressure.
3. Ignitor spark gap distance incorrect.
4. Pilot burner orifice obstructed.
5. Ignition Module malfunction.
1. Ignitor/flame sense lead wire connections malfunction.
2. Improper ground on pilot burner or ignitor/flame sense;
or ignitor/flame sense malfunction.
3. Pilot burner misaligned or Ignitor/flame sense
malfunction.
4. Gas pressure not within specified range.
5. Incorrect polarity from transformer to Ignition module.
6. Ignition Module malfunction.
1. Gas pressure incorrect.
2. Runner tube - gas orifice obstructed or malfunction.
3. Main burner - gas orifice obstructed or malfunction.
4. Main Burner(s) incorrect air shutter position or burner
malfunction.
5. Gas combination valve malfunction.
1. Temperature controller malfunction.
2. Pan position/down limit switch malfunction.
3. Ignition module malfunction.
4. Gas combination valve malfunction.
5. Interconnecting wiring malfunction.
1. Main circuit breaker off or power not connected.
2. On/off switch off or malfunction.
3. Transformer inoperative.
4. Interconnecting wiring malfunction.
1. Temperature probe malfunction.
2. Temperature controller malfunction.
3. Gas pressure incorrect.
4. Gas orifice obstructed or incorrect.
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POSSIBLE CAUSES
F25121 (February 2003)