FAULT LIST
FAULT
GAS RE-IGNITION
BURNER X
GIF-X
Following an ignition module fault if the
modules gas valve activates this fault will be
generated.
-Ensure that the ignition module is not
miswired or that the module is not
faulty by swapping it with a known
good one. If the problem follows the
ignition module, replace the module
-Consult factory
FAULT
DRAIN NOT
WORKING
DRAIN IS BLOCKED
DBF
There are many time windows in the GS
software. If, during a drain cycle, the time
window for the water level to drop is exceeded,
this fault is generated
-Ensure that pump is being energized
-Check for blockage in all aspects of
the drain system
-Float board defective
-Consult factory
FAULT
FLOAT CHECK
FCF
Once every 24 hours (provided the unit is
powered and in an operating or standby
condition) the controller will test the water
level detection circuit. If the test fails this fault
is displayed
-Ensure the proper operation of the fill
valve and drain valve via the
diagnostics screen
-Float board is defective
-Consult factory
FAULT
ILLEGAL FLOAT
COMBINATION
WLF
If the controller detects two or more float level
readings, which are not expected (ex. Switch 1
and 3 ON or switch 1, 2, and 3 ON) this fault
will be recorded.
-Miswired float board
-Defective float board
-Consult factory
FAULT
FILL VAVLE ON
DETECTION
INCONSISTENT
FDF
The controller monitors the water level as it
fills and drains. It expects to see the levels
increase logically (1-2-3-4-5). If the water level
increases and jumps a step (1-2-4-5) this fault
will be generated. The same holds for water
level decreasing.
-Float board defective
-Contact agent for replacement float
board
FAULT
KEEP WARM TIME
OUT
TOO LONG TO
HEAT
KWF
During a keep warn cycle, if the tank
temperature sensor does not open within a
certain time window, this fault is generated.
-Ensure that the tank temperature
sensor is connected
-Defective tank temperature switch
-Contact agent for replacement switch.
FAULT
STACK OVER
TEMP.
SWITCH TRIPPED
OTF
If input TB5, # 4 on the logic board goes low
(no 24 Vac detected) this fault will be
generated. This could indicate either the tank
over temperature switch has opened or the
stack over temperature switch has opened.
-Do not operate and consult the factory
FAULT
MAINTENANCE
TIME
HAS ELAPSED
HMF
In the user menu the user sets the maintenance
time. Once this time expires a warning is
displayed. 72 hours later the warning changes
to this fault. The maintenance time is measured
in weighted operational hours.
With switch 5, #4 deactivated, this fault is
enabled
-Perform tank cleaning and all other
maintenance requirements outlined in
the manual.
FAULT
WATER FILL FAIL
FTF
Fill time-out fault during fill process. The GS
software monitors the changes in water level
during filling sequence. If ware level changes
do not occur within an expected time interval,
this fault will be generated.
-Verify water supply is open
-Verify adequate water supply to unit
(30-80psi, 10L/min, minimum ½” dia.
Line size)
-Verify wire harness and connection
between float chamber and I/O board
(TB)
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Summary of Contents for GS 100
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