Ignition State And Timing; System Status And Error Codes - A.O. Smith GPVX 75L Series Installation And Operating Manual

IGNITION STATE AND TIMING

IGNITION STATE
Pre-purge
Hot Surface Igniter
(HSI) Warmup
Ignition Activation
Period (IAP)
Flame Recognition
Period (FRP)
Trial For Ignition
Flame Stabilization
Period
Inter-purge
Flame Failure
Response Time
Post-purge
Pressure Switch (PS)
Prove Period
Pressure Switch (PS)
Fault Delay (failed
open/closed)
Soft Lockout
Energy Cut Off
(ECO) Limit Lockout
Flammable Vapour
(FV) Sensor Lockout

SYSTEM STATUS AND ERROR CODES

The micro-controller inside the gas control monitors the
flammable vapour safety features, the ignition sequence,
temperature settings and overall operation of the heater.
If any of these parameters does not operate properly the
controller will shut down the water heater, diagnose the
failure and flash an error code. The table below lists the
System Status Codes for the Honeywell control. Refer
to it and to the "Troubleshooting Guidelines" to diagnose
the problem before attempting corrective action. See also
"Flammable Vapour Sensor".
100271597
TIMING
5 seconds (NG models)
15 seconds (LP models)
10 seconds
3.5 seconds maximum
0.5 second
IAP + FRP
Not Applicable
30 seconds
2 seconds max
(@ 1uA flame current)
30 seconds
2 minutes
2 minutes
20 minutes
Indefinite
Indefinite (see
"Resetting The Heater Control")
LED Flash
Sequence
Short flash
IDLE (no call for heat,
once every four
no fault conditions)
seconds
"Heartbeat", Call For Heat
alternates bright/dim (no fault conditions)
One Flash, Low Flame Signal
three second pause (control continues to operate)
Two Flash, Pressure Switch Failed
three second pause Closed
Three Flash,
Pressure Switch Failed Open
three second pause
ECO (Energy Cut Off) Limit
Four Flash, Lockout
three second pause thermostat temperature limit
was exceeded.
Five Flash,
Flame Out Of Sequence
three second pause
Soft Lockout
Six-One Flash,
- Retry Limit
three second pause
- Failed Trial For Ignition
Soft Lockout
Six-Two Flash, - Recycle Limit
three second pause - Pressure Switch/High Limit
opened
Soft Lockout
Six-Three Flash,
- Recycle Limit
three second pause
- Flame Lost
Soft Lockout
Six-Four Flash, three
- Flame out of Sequence
second pause
Sensed
Seven Flash, Flammable Vapour Sensor
three second pause (FVS) Lockout
Eight-One Flash, Flammable Vapour Sensor
three second pause FVS Fault Detected
Eight-Two Flash, Temperature Sensor Fault
three second pause Detected
Eight-Three Flash,
Electronics Fault Detected
three second pause
Eight-Four Flash,
Valve Fault Detected
three second pause
Hardware Fault
Indefinite
Lockout
Control Status
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