Tjernlund GPAK-1TR 8504047 Rev B 06/14 - Manual (Page 11)

TROUBLESHOOTING
10
SYMPTOM 1: POWER VENTER DOES NOT RUN DURING CALL FOR HEAT
Step 1.2
Contact T-Stat manufacturer for further
assistance.
24V
24Volts
Not Present
No
No
Solution: Contact appliance manufacturer
for further assistance
Step 1.1
Interlocked with thermostat at furnace
Verify 24V across R & C on furnace
terminal strip.
Step 2.
Remove 115V power source to
the Power Venter. Remove
the two BLACK leads from the
Relay and connect them
together. Reestablish 115V.
Result: Power Venter runs
continuously.
Solution: Replace Relay/Timer
Part # 950-0014 nonadjustable or
Part # 950-1067 adjustable
Relay/Timer.
24V
Solution: Replace Power Venter Motor.
Part # 950-1020
Yes
Step 1.
Activate thermostat to call for
heat. Check for 24V across
terminals 4 and 5 of the
Relay/Timer.
SYMPTOM 2: POWER VENTER RUNS CONTINUOUSLY / ERRATICALLY
No
Solution: Replace Relay/Timer. Part # 950-0014 nonadjustable or
Part # 950-1067 adjustable Relay/Timer.
Solution: Contact the appliance manufac-
turer for further assistance
Step 3.
Reinstall the ORANGE wire on Relay. Verify thermostat is not calling for heat.
Interlocked with thermostat at furnace
Check for voltage across W & C at thermostat.
No call for heat
Contact Tjernlund Products, Inc. for
further assistance.
24 Volts present
Step 1.
Confirm that thermostat is not
calling for heat.
Step 2.
With the Power Venter running, remove the ORANGE wire
on Relay/Timer terminal #5.
Result: Power Venter should shut off within approximately 45
seconds with nonadjustable Relay/Timer. Power Venter will
run for 1 to 10 minutes if adjustable Relay/Timer is installed.
Yes
24 Volts not present