American Standard Standard Residential, Operating, Installation And Service Manual

Page: 39 / 44

36
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
(@ 1 uA 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
LED FLASH
SEQUENCE
CONTROL
STATUS
Short flash once
every four seconds IDLE (no call for heat,
no fault conditions)
“Heartbeat”,
alternates bright/dim Call for Heat
(no fault conditions)
One Flash, three
second pause
Low Flame Signal
(control continues to
operate)
Two Flash, three
second pause Pressure Switch Failed
Closed
Three Flash, three
second pause Pressure Switch Failed Open
Four Flash, three
second pause
ECO (Energy Cut Off) Limit
Lockout
thermostat temperature
limit
was exceeded.
Five Flash, three
second pause
Flame Out Of Sequence
Six-One Flash, three
second pause
Soft Lockout
- Retry Limit
- Failed Trial For Ignition
Six-Two Flash, three
second pause
Soft Lockout
- Recycle Limit
- Pressure Switch/High Limit
Opened
Six-Three Flash, three
second pause
Soft Lockout
- Recycle Limit
- Flame Lost
Six-Four Flash, three
second pause
Soft Lockout
- Sensed flame out of
Sequence
Eight-Two Flash,
three second pause Temperature Sensor Fault
Detected
Eight-Three Flash,
three second pause
Electronics Fault Detected
Eight-Four Flash,
three second pause
Valve Fault Detected
Hardware Fault
Lockout
Indefinite
SYSTEM STATUS AND ERROR CODES
The micro-controller inside the gas control monitors
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.
IGNITION STATE
AND
TIMING