Troubleshooting; Furnace Troubleshooting Chart - Wolf Steel Condo Pack Installation And Operating Instructions Manual

7. TROUBLESHOOTING

7.1

FURNACE TROUBLESHOOTING CHART

Apply Power To Furnace
Thermostat Calls For Heat
Air Proving Switches
Proved Open & Limit
Circuit Closed
Combustion Air Blower On
Air Proving Switch Proved
Closed Within 60 Seconds?
Prepurge 15 Seconds
Ignitor Energized 5 Seconds
(10 Seconds on Retries)
Main Valve Opens
Main Burner Lights And Is Sensed
During Trial For Ignition?
Ignitor Energized
Heat Circulating Air Fan On
After Programmed Delay
Flame Sense Lost?
Thermostat Call For Heat Ends
Main Valve Closes
Combustion Air Blower O After Post
Purge (5 Seconds)
Circulating Air Fan O After
Blower O Delay
Wait For Next Call For Heat
SEQUENCE OF OPERATION
Troubleshooting Flowchart
NO
Wait For Air Proving Switch
to Open. Flash "3"
YES
60 Minute Wait Period
NO
Combustion Air Blower O
YES
30 Seconds Between
Trial Purge
NO
Main Valve Closes
YES
Failed Trials For Ignition
Less Than Four During
This Ignition Sequence?
YES
Main Valve Closes
Flame Sence Lost More Than Four
Times In This Call For Heat?
Wait For Limit Circuit
to Close and/or Reset
of Flame Rollout.
Flash "1"
Flash "2"
NO
YES
TABLE 5.
1 Hour Lockout Reset
Delay. Flash "4"
Circulating Air Fan O
After Blower O
Delay
Combustion Air Blower
O After Post Purge
W415-1307 / B / 03.31.2017
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