GasTrac Process Air Heater
UGD014/1097
6-12
T
ROUBLESHOOTING
Alarm
Phase U Fault
Phase V Fault
Phase W Fault
Phase UV Short
Fault
Phase UW Short
Fault
Possible cause
The controller has detect-
ed a phase U-to-ground
fault between the con-
troller and combustion
blower motor.
The controller has detect-
ed a phase V-to-ground
fault between the con-
troller and combustion
blower motor.
The controller has detect-
ed a phase W-to-ground
fault between the con-
troller and combustion
blower motor.
Excessive voltage was
detected between the U
and V controller output
phases.
Excessive voltage was
detected between the U
and W controller output
phases.
Solution
❒
Check the wiring between
the control and motor for
damage or incorrect connec-
tions.
❒
Make sure the motor ground
is wired correctly.
❒
Check the wiring between
the control and motor for
damage or incorrect connec-
tions.
❒
Make sure the motor ground
is wired correctly.
❒
Check the wiring between
the control and motor for
damage or incorrect connec-
tions.
❒
Make sure the motor ground
is wired correctly.
❒
Check for a shorted condi-
tion in the wiring to the
controller.
❒
Check motor wiring for a
shorted condition.
❒
Check for a shorted condi-
tion in the wiring to the
controller.
❒
Check motor wiring
07
38
07
39
07
40
07
41
07
42
V
ARIABLE
S
PEED
C
ONTROLLER
A
LARMS
ESC
SEL
When a problem occurs, the variable speed
controller displays the parameter 07 and a
two-digit fault code. You must correct the
problem before restarting the GasTrac. To
restart after an alarm:
Turn the power disconnect
OFF
then
ON
.
Press the GasTrac
RUN
button.
1
2
WARNING: The GasTrac should be tested and
repaired only by qualified technicians equipped with the
correct tools and trained in the maintenance and repair
of electrical systems and industrial gas appliances.
!
Fault code