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F.
TROUBLESHOOTING TIPS
F.1 Heater is not operating
1.
Check all fuses.
2.
Check disconnect switch.
3.
Check voltage supplied to the heater – refer to the heater
data plate for voltage requirements.
4.
Check control voltage if transformer is installed.
5.
Check thermostat by turning it and check continuity.
6.
Check the condition of the disconnect switch if the
heater is so equipped. Measure continuity through the
disconnect by engaging the switch.
7.
Verify that there is a jumper wire present between the
terminals as per the wiring schematics (refer to Figure 2
to Figure 7, page 6 to 9), if your heater is wired with this
feature.
8.
If problem still exists, contact factory.
F.2 Contactor is chattering
1.
Check supply voltage.
2.
Check control voltage if transformer is installed.
3.
Check wiring connections. Tighten all loose electrical
connections.
4.
Check thermostat for continuity. If thermostat does not
break continuity replace thermostat.
5.
Check for excessive heater vibration.
6.
Do not operate if problem persists. Contact factory.
F.3 Contactor is burned or welded
1.
Check the contactor for burn marks and blackening. If
present, replace the contactor.
2.
Check incoming power to the heater to ensure there are
no voltage fluctuations.
3.
Check heating element for continuity.
4.
Check motor for continuity.
5.
Check thermostat for continuity. If thermostat does not
break continuity replace thermostat.
6.
Do not operate if problem persists. Contact factory.
F.4 Heater cycles on high limit
1.
Check the inlet and discharge louvers for air blockage.
2.
Check for heating element fouling.
3.
Ensure motor is functioning and fan is rotating counter
clockwise when viewed from the rear.
4.
Do not operate the heater if problem persists.
Contact factory.
F.5 Heater is operating but no heat is present
1.
If equipped with a "CONTINOUS FAN" switch, ensure the
switch is in the "AUTO" position.
2.
Check the control voltage to the contactor coil, if unit is
equipped with a contactor and transformer. If voltage is
not within specification replace the transformer.
3.
Measure and record all element resistances. Contact
factory to verify if elements are within specifications. If
not within specification replace heating element(s).
4.
If problem persists, contact factory.
F.6 Heater fan does not operate but the heating
elements operate
1.
Ensure fan blade spins freely to check motor bearings.
Replace motor as required.
2.
Do not operate unit. Contact factory.
F.7 T he Ground Fault Interrupter (GFI) trips on the main
panel, or heater blows fuses
1.
Check that you have a fuse of the proper amperage
rating.
2.
Check for loose or frayed wiring.
3.
If condition is not observable, send heater in for repair.
F.8 T he fan is turning but very little air comes from the
front of the heater
1.
The proper motor/fan rotation, viewed from the rear of
the heater is counter clockwise. Refer to the Section B -
Installation, page 3.
2.
Check fan blade set screws to ensure fan blade is not
loose on the motor shaft.
3.
Do not operate. Contact factory.
Table 4 – Recommended Torque Specifications
Item
without bus bars
Heating Elements
with bus bars
Contactor
Mounting Bolt/Nut
Inch Pounds
16
30
18-22
65-75 (ft-lbs)
13
13
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