FULL SIZE GAS CONVECTION OVENS - TROUBLESHOOTING
TROUBLESHOOTING
WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER AND FOLLOW LOCKOUT/TAGOUT PROCEDURES, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.
ALL MODELS
SYMPTOMS |
| POSSIBLE CAUSES |
Blower motor doesn’t run with 1S in OVEN COOL | 1. | Line voltage. |
position. | 2. | Power switch (S1) malfunction. |
| 3. | Switch (S3) malfunction. |
| 4. | Interconnecting wiring malfunction. |
| 5. | Motor inoperable. |
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Blower motor doesn’t run in ON position. OVEN | 1. | Door switch malfunction. |
COOL functions OK. | 2. | Power switch contacts inoperative. |
| 3. | Interconnecting wiring malfunction. |
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Blower motor doesn’t run in OVEN COOL position. | 1. | Power switch malfunction. |
Runs OK in ON position. | 2. | Interconnecting wiring malfunction. |
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Gas does not ignite; No spark; No Ignition Light ON. | 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. |
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Sparks but gas does not ignite. | 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. |
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Gas ignites but will not maintain flame. | 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 |
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| module. |
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Excessive or low heat. | 1. | Temperature probe malfunction on models |
|
| WKGD, WKGDX. (Thermostat malfunction on |
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| models WKG, WKGX) |
| 2. | Temperature control board malfunction. |
| 3. | Gas pressure Insufficient. |
| 4. | Gas orifice plugged or obstructed. |
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Mechanical Timer inoperative or not functioning | 1. | Interconnecting wiring malfunction. |
properly. | 2. | Line voltage incorrect. |
| 3. | Timer malfunction. |
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F32700 (February 2006) |
| Page 62 of 64 |
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