Troubleshooting; All Models - Vulcan-Hart 1GR45A Service Manual

ALL MODELS

SYMPTOMS
No spark to ignite pilot gas.
Sparks but gas does not ignite.
Gas pilot ignites but will not maintain flame.
Gas burners ignite but will not maintain flame.
Excessive or low heat.
Intermittent problems.
No power to cooking control, fryer does not
heat.
High limit thermostat shutting off gas burners.
Excessive time to melt shortening
(more than 45 minutes).
GRA SERIES GAS FRYERS - TROUBLESHOOTING

TROUBLESHOOTING

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POSSIBLE CAUSES
Drain valve switch open or switch malfunction.
Shorted electrode or an improper ground on ignitor/flame
sense.
Ignitor cable open.
Interconnecting wiring malfunction.
Ignition Module malfunction.
Service gas valve closed.
Gas supply off or insufficient gas pressure.
Gas supply quick disconnect coupling not properly mated.
Gas combination valve off or inoperative.
High limit thermostat open.
Interconnecting wiring malfunction.
Ignition Module malfunction.
Ignitor ground inoperative.
Ignitor/flame sense misaligned or malfunction.
Insufficient gas pressure.
Ignition module malfunction.
Gas pressure incorrect.
Gas orifice obstructed or incorrect.
Burner malfunction.
Gas pilot malfunction.
Cooking controls need calibrated.
Temperature probe malfunction.
Gas pressure incorrect.
Gas orifice obstructed or incorrect.
Cooking control malfunction.
Interface board malfunction.
High ambient temperatures.
Wiring connections loose.
Power switch off or malfunction.
Transformer inoperative.
Interconnecting wiring malfunction.
Shortening level below minimum fill line.
Probe malfunction.
Cooking control malfunction.
High limit thermostat malfunction.
Insufficient gas pressure.
Gas orifice plugged or obstructed.
Probe malfunction.
Cooking control malfunction.
F25377 (March 2010)