NV360/580 Series
Troubleshooting
Honeywell VS8420 Standing Pilot
START
Gas Supply ON
YES
Pilot Lights with Piezo Ignitor
YES
Pilot Stays Lit
YES
Pilot Lights
Main Burner
YES
Remove Glass Panel Before Servicing.
CHECK
NO |
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| • Supply line hooked up | ||
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| • Shutoff valve open | |||
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| • Lockout has engaged. Wait |
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| 60 seconds and try again. |
NO |
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| • For spark at electrode while | |
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| depressing Piezo - 1/8" gap to | ||
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| pilot hood needed. |
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| • All wiring connections |
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| • Replace Piezo ignitor |
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| • For air in lines |
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| • Thermopile needs a minimum |
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| 325mV. Adjust pilot flame height. |
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| • All Wiring connections |
NO |
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| • Replace thermopile |
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| • Thermocouple needs a minimum | ||
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| 14mV. |
•Defective valve. Turn to pilot, meter should read greater than 100mV. If not, replace.
•Valve is turned on
•Wall switch is not turned on.
NO |
| Watch for grounded wires! |
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•Thermopile needs a minimum 325mV.
•Plugged burner orifice.
System OK
FP396a
16 | 20003565 |
