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DVBR Series Direct Vent Gas Fireplace
20000584
Troubleshooting – Honeywell VS8421
START CHECK
Gas Supply On
Pilot Lights With Piezo
Ignitor
• Lockout Has Engaged. Wait 60
Seconds And Try Again.
• For Spark At Electrode While
Depressing Piezo
1/8" Gap To Pilot Hood Needed.
• All Wiring Connections
• Replace Piezo Ignitor
• Supply Line Hooked Up
• Shutoff Valve Open
PILOT STAYS LIT
• For Air In The Lines
• Thermopile Needs A Min.
325mv. Adjust Pilot Flame
Height.
• All Wiring Connections
• Replace Thermopile
• Thermocouple Needs A Min. Of
14mv
PILOT LIGHTS MAIN
BURNER
• Valve Is Turned On
• Wall Switch Is Not Turned On.
Watch For Grounded Wires!
• Thermopile Needs A Min. 325mv.
• Plugged Burner Orifice
• Defective Valve. Turn To Pilot,
Meter Should Read Greater Than
100mv. If Not, Replace.
SYSTEM OK
YES
NO
NO
NO
NO
YES
YES
YES
Remove window frame assembly before service work