TROUBLESHOOTING THE ELECTRONIC IGNITION SYSTEM
Note: Before troubleshooting, be sure that the appliance main line gas
Important: Valve system troubleshooting should only be accomplished by a qualified service technician.
| SYMPTOM | POSSIBLE CAUSES | CORRECTIVE ACTION |
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1. | Burner will not light. | A. Faulty Valve System. | See Below. |
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| B. “OFF/ON” or wall switch | Disconnect the two black wires from the wire nuts. Test switch(s) for |
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| defective. | continuity with a multimeter. If continuity is not indicated, switch(s) is |
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| defective and must be replaced. |
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| Note: Before replacing “OFF/ON” switch, be sure to check wiring for loose |
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| connections or broken wires and repair as needed. |
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2. | Burners come “ON” but | A. Burner orifice plugged. | Check main burner orifice(s) for stoppage. Clean or replace. |
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| B. Obstructed vent system. | Check vent system for obstructions. | |
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START
•Turn Off Gas Supply
•Assure Valve Switch Is In ON Position
•Disconnect Control Harness
•Set Thermostat To Call For Heat
Insert A | End View Of | |
| Control Harness | |
24 Volt Hot | Connector | |
24 Volt | ||
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| Common |
• Check For Proper Voltage At Control Harness
(See Insert A). Voltage Should Be 24V |
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Between Thermostat Or Pressure Switch |
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And 24V Common And 24V Hot. | 2 |
YES |
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• Plug Control Harness Into Valve. Wait For | |
Internal Check Delay. |
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• Igniter Warms Up And Glows Red. | |
1 | YES |
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| CHECK |
NO | • Line Voltage Power | |
• Low Voltage Transformer | ||
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| • Limit Controller |
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| • Thermostat |
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| • Wiring |
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| NO | • With Pilot Burner Cable Connected, Measure | ||
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| Voltage At Valve HSI Element Output. 24V | |||
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| Nominal. (See Insert B) | 2 |
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| 1 | |
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YES
NO
• Replace Valve.
24 Volt
Switched
Check For Damaged Or Missing Terminals In Connector
Insert B
Igniter Terminals
• Turn On Gas Supply. • Pilot Burner Lights. |
YES
•Replace Igniter/Flame Rod Assembly.
YES
| NO |
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| • Check That Pilot Gas Is Flowing. Wait To |
| NO |
| • Replace Valve. | |
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| Assure Plot Gas Tubing Is Purged. Recycle |
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| Call For Heat If Necessary. |
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| YES |
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| • Measure Voltage Between 24V Hot And 24V Common |
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| Leads To Valve Control. Must Measure At Least 19.5 | NO |
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| VAC With Igniter Powered (See Insert A). To Identify |
| • Check Transformer And | ||||
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| Line Volt Supply. | ||||
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| Proper Lead, This Check Must Be Done With The |
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| Valve Control Connected And Igniter Powered. |
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| YES |
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| • Replace Pilot Assembly. |
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| • Check That Pilot Flame Makes Good Contact With | |||
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| NO | Pilot Burner Flame Rod. | ||||
• Main Valve Opens And Main Burner Lights. | • Check For Good Electrical Connection Through The | ||||||
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| Pilot Tubing. | |||
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| • If Both Of The Above Are Good, Replace Igniter/Flame | |||
| YES |
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| Rod Assembly. | |||
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| YES | |
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• System Is Okay. |
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| • Cycle Thermostat Off And Back On. |
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1 | Igniter Will Cycle Off And Back On Once During | 2 | When Measured Voltage At Connections, Use | • Main Burner Lights. | NO |
| • Replace Valve. |
| The 90 Second Ignition Trial. All Voltage |
| Care To Assure Terminals Are Not Damaged. |
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| Measurements Must Be Taken While The Igniter |
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| Is Powered. |
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17
