GasTrac Process Air Heater
UGD014/0497
6-8
T
ROUBLESHOOTING
Alarm
The main flame
failed after
RUN
was
pushed and the
flame had been
established for at
least 10 seconds.
WARNING:
The GasTrac
should be tested
and repaired only
by qualified techni-
cians equipped
with the correct
tools and trained in
the maintenance
and repair of elec-
trical systems and
industrial gas
appliances.
Possible cause
Are the gas shutoff valves
open?
Did the ultraviolet flame
detector fail to send an
adequate signal?
Are the safety pressure
switches malfunctioning
or detecting incorrect
pressures?
Is the gas pressure regu-
lator adjusted correctly?
Solution
❒
Verify that the manual gas
shutoff valves are open.
❒
Verify that the automatic gas
shutoff valves remain open
after burner ignition. If
automatic shutoff valves are
not opening, check the sole-
noid electrical connections.
During operation, the flame
signal should fluctuate
between 1.25V and 5V D.C.
❒
Verify that the ultraviolet
flame detector lens is clean.
❒
Check for blockage in the
cooling air line between the
ultraviolet sensor and com-
bustion air blower. The tem-
perature at the sensor must
be less than 215˚F.
❒
The sensor or flame amplifi-
er may need to be replaced.
Reset the GasTrac, press
RUN
and check the LED lights on
the process air, combustion air,
low gas and high gas pressure
switches during the 90-second
purge cycle. If a light is not
green, check for leaks, block-
age or other problems that
could interfere with air or gas
flow detected by that switch.
Make sure the gas pressure
regulator is adjusted to supply
the pressure outlined in the
S
PECIFICATIONS
pages.
B
URNER
C
ONTROLLER
A
LARMS
When there is a problem related to the
burner or ignition, the burner controller
displays a fault code and illuminates an
alarm light. To restart the GasTrac after a
burner controller alarm:
Press the GasTrac
STOP
button.
Press the burner
RESET
button.
Press the GasTrac
RUN
button.
1
2
3
LOCKOUT #17
*Main Flame Fail*
!