54 100299634_2000545244_ Rev. A
TROUBLESHOOTING GUIDELINES
These guidelines should be utilized by a qualified service
agent.
RESETTING THE HEATER CONTROL
• Soft lockouts as diagnosed by the system error codes
require the gas control to be reset.
• To reset the control, slide the “ON/OFF” switch to the
“OFF” position. Wait for 10 seconds and move the
switch back to the “ON” position.
• If the problem that caused the control to lock out has
not been corrected, the control will remain or again go
back into lockout.
LOCKOUTS
Soft Lockout
• Occurs when a system safety device trips to break the
sequence of operation. The control will try to start the
system in a timed basis but will not reinstate operation
until the failure is corrected.
Hard Lockout
• Occurs when the main controller fails and must be
replaced.
IGNITION STATE AND TIMING
IGNITION STATE TIMING
Pre-purge
5 seconds (NG models)
15 seconds (LP models)
Hot Surface Igniter
(HSI) Warmup
10 seconds
Ignition Activation
Period (IAP)
3.5 seconds maximum
Flame Recognition
Period (FRP)
0.5 second
Trial For Ignition IAP + FRP
Flame Stabilization
Period
Not Applicable
Inter-purge 30 seconds
Flame Failure
Response Time
2 seconds max
(@ 1uA flame current)
Post-purge 30 seconds
Pressure Switch (PS)
Prove Period
2 minutes
Pressure Switch (PS)
Fault Delay (failed
open/closed)
2 minutes
Soft Lockout 20 minutes
Energy Cut Off
(ECO) Limit Lockout
Indefinite
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