16 Troubleshooting
A. Troubleshooting
With proper installation, operation, and maintenance your gas appliance will provide years of
The normal behaviors of the board could be inhibited by the anomalies described in the following tables.
Note on the automatic ignition sequence:
•The supervised pilot flame detection is activated only after a command is correctly received.
•The sparking means are activated only after no parasitic flame is detected, before the ignition.
•The pilot gas valve is energized, and the gas will flow, only after the sparking means are activated.
•The main burner gas valve is energized, and gas will flow, only if commanded and after the supervised pilot flame is detected to be continuously lit.
•The system will try two times for ignition.
•Each try for ignition will last approximately 60 seconds.
•The wait time between the two tries is approximately 35 seconds.
•If there is no positive ignition, after two tries, the ignition module will go into lockout.
Note: To reset the ignition module lockout - turn the unit off for five seconds, then back on.
| Symptom |
| Possible Cause | Corrective Action |
1. | The ignitor/ | a. | Incorrect wiring. | Verify “S” wire (white) for sensor and “I” wire (orange) for ignitor are connected to the |
| module makes |
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| correct terminals on the module and the pilot assembly. Reversed wires at the module |
| noise, but no |
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| may cause the system to make a sparking noise, but the spark may not be present at |
| spark. |
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| pilot hood. |
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| b. | Loose connections or | Verify there are no loose connections or electrical shorts in wiring from module to |
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| electrical shorts in the wiring. | pilot assembly. The rod closest to the pilot hood should be ignitor. Verify connections |
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| underneath pilot assembly are tight; also verify the connections are not grounding out |
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| to the metal chassis, pilot burner, pilot enclosure, mesh screen if present, or any other |
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| metal object. |
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| c. | Ignitor gap is too large. | Verify gap of ignitor to pilot hood. The gap should be approximately .17 in. or 1/8 in. |
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| d. | Faulty module. | Turn ON/OFF rocker switch or wall switch to OFF position. Remove ignitor wire “I” |
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| from module. Place ON/OFF rocker switch or wall switch in ON position. Hold ground |
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| wire about 3/16 in. away from “I” terminal on module. If there is no spark at “I” terminal, |
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| module must be replaced. If there is a spark at “I” terminal, module is fine. Inspect pilot |
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| assembly for shorted sparker wire or cracked insulator around electrode. |
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2. | Pilots won’t light, | a. | Fireplace burner control | Verify that fireplace burner control is installed and plugged into module. Check voltage |
| there is no noise |
| installed incorrectly. | of transformer under load at space connection on module with ON/OFF switch in ON |
| or spark. |
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| position. Acceptable readings of a good transformer are between 3.2 and 2.8 volts AC. |
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| b. | A shorted or loose | Remove and install the wiring harness that plugs into module. Verify there is a tight fit. |
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| connection in wiring | Verify pilot assembly wiring to module. Remove and verify continuity of each wire in |
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| configuration or wiring | wiring harness. |
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| harness. |
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| c. | Module not grounded. | Verify green ground wire from module wire harness is grounded to metal chassis of |
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| d. | No gas flow out of pilot | Check gas mains supply and pressure. Check gas valve wirings and connections to the |
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| burner. | board. Check for pilot burner obstruction. |
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| e. | No ionization current | Remove/clean eventual bridging carbon deposits betweeh the pilot burner and the |
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| established through flame | ionization rod. |
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| within ignition time. |
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| f. | No gas flow out of pilot | Check gas mains supply and pressure. Check the correct gas type setting on the valve |
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| burner or pilot gas presure | and pilot burner assembly orifice. |
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| dropout upon main burner |
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| gas valve opening. |
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| g. | No spark generation. | Check parasitic pilot flame existence. |
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| h. | No spark voltage reaches | Check for cracks in the rod ceramic insulator, replace as necessary. Check pilot |
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| the spark rod, or spark | assembly wirings and spark return connections to the board. |
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| developes near pilot |
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| assembly. |
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