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WARNING LIST
GSTC Warning
displayed
GSP warning
displayed
Description of w arning: Troubleshooting
WARNING
IGNITION MODULE X
FAIL
IMW-X Once the controller activates an ignitio n module, it will
allow 4 minutes for the gas valve to activate. After the trial
period, if the gas valve has not activated, a fault will be
generated. The module will be locked out and the next
burner will be indexed.
SEE FAULT LIST
WARNING
AIR PROVING SWITCH X
OPEN WITH
BLOWERS ACTIVE
APW-X Should the air proving switch open while the unit is
operating this warning is generated. The controller shuts
down and retries. There are no limits to the amount of times
this warning is generated.
SEE FAULT LIST
WARNING
AIR PROVING SWITCH X
OPEN WITH
BLOWERS ACTIVE
AOW-X On startup if the AP switch does not close within the proving
period. After 3 tries, a fault will be generated.
SEE FAULT LIST
WARNING
BLOWER X
RPM HIGH
BHW-X If a blower RPM is above the RPM tolerance limit this
warning is generated. If it is above the RPM tolerance limit
for more than 10 seconds a fault will be generated.
SEE FAULT LIST
WARNING
BLOWER X
RPM LOW
BLW-X If a blower RPM is below the RPM tolerance limit this
warning is generated. If it is below the RPM tolerance li mit
for more than 10 seconds a fault will be generated.
SEE FAULT LIST
WARNING
MAINTENANCE TIME
HAS ELAPSED
HMW In the user menu the user sets the main tenance time. Once
this time expires this warning is disp layed. The maintenance
time is measured in weighted operational hours.
With switch 5, #4 activated, this warning will remain until
the warning is r eset in the User level
SEE FAULT LIST
WARNING
Too LONG TO FILL
UNW-6 Low water level has not been reached within expected time
interval during initial fill sequence. Unit will contin ue filling
while warning is displayed. A Water Fill Fail fault will be
generated if the low water level is not reached after an
additional length of time.
SEE FAULT LIST
WARNING
KEEP WARM ACTIVE
SYSTEM DEMAND
ACTIVATED AT 75%
UNW-C Keep warm feature has initiated combustion sequence at
75% output. This occurs when keep warm feature has been
activated via dip-switch settings, the system demand is
below minimum and the tank temperature sensor is
registering cold (open contacts).
-Warning message
will stop being
displayed once tank
temperature sensor
indicates water is
warm
-Keep warm feature
can be disabled using
dip-switch settings
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