Napoleon WSX-EN Series, Installation And Operating Instructions Manual

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W415-2845 / B / 11.10.20
54
IOM IOM
19.4 TROUBLESHOOTING FLOWCHART
H23.3.2
Apply Power To Furnace
Thermostat Calls For Heat
Air Proving Switches
Proved Open & Limit
Circuit Closed
Wait For Air Proving Switch
to Open. Flash "3"
Wait For Limit Circuit
to Close and/or Reset
of Flame Rollout.
Flash "1"
Combustion Air Blower On
Air Proving Switch Proved
Closed Within 60 Seconds?
Combustion Air Blower Off
Flash "2"
60 Minute Wait Period
Prepurge 15 Seconds
HSI Energized 5 Seconds
(10 Seconds on Retries)
Low Main Valve Opens
HSI De-Energized
Main Burner Lights And Is Sensed
During Trial For Ignition?
Low Main Valve Closes
Failed Trials For Ignition
Less Than Four During
This Ignition Sequence?
Low Heat Circulating Air Fan On
After Programmed Delay
Flame Sense Lost?
Thermostat Call For Heat Ends
Low Main Valve Closes
Combustion Air Blower Off After Pos t
Purge (5 Seconds)
Circulating Air Fan Off After
Programmed Delay
Wait For Next Call For Heat
Low Main Valve Closes
Flame Sense Lost More Than Four
Times In This Call For Heat?
Combustion Air Blower
Off After Post Purge
Circulating Air Fan Off
After Programmed
Delay
1 Hour Lockout Reset
Delay. Flash "4"
Call For High Heat
Air Proving Switch
Proved Closed Within 30
Seconds
Five Minute Wait For
Retry.
High Stage Main Valve
Opens Circulating Air
Fan To High Heat Speed
High Heat Call Ends Low
Heat Demand Remains
High Stage Main Valve
And Call For High Heat
Circulating Air Fan De-
Energized
30 Seconds Between
Trial Purge
NO
NO
YES
YES
YES
NO
YES
YES
NO
NO
YES
NO
NO
YES
SEQUENCE OF OPERATION
Troubleshooting Flowchart