Advertisement
Troubleshooting
Problem
Unit will not turn on
Unit not producing heat
Unit turns off suddenly
or cycles off before
reaching temperature
set point
Figure 17:
Control Panel
Probable Cause
Thermostat set point too low.
Improper or loose wire
connections.
Disconnect switch in off position.
Tripped circuit breaker or blown
fusing (located remotely from unit).
Blown internal fusing (located on
units rated above 48 amps).
Thermostat set point too low.
Summer fan switch is set to
"Summer" mode or wired incor-
rectly
Element Failure
Low airflow is causing automatic
reset temperature cutout on ele-
ments to activate.
Low airflow is causing motor ther-
mal cutout to activate.
Solution
Turn dial in clockwise direction to increase tem-
perature set point.
Check control and power circuit to make sure
they are wired properly and for any loose wire
connections.
Make sure disconnect switch is in "on" position
by turning it in the clockwise direction.
Check to see if circuit breaker has been tripped
or replace fusing.
Replace fusing as needed.
Turn dial in clockwise direction to increase tem-
perature set point.
If a summer fan switch is installed, check to
make sure it is switched to the "Winter" setting.
Check to make sure wires on switch are not
reversed.
Element failure can be confirmed by performing
a continuity test or by measuring the elements
resistance.
There are several reasons for low airflow and
most of them can be easily corrected.
• The first reason for low airflow is stratification
of the air in a room. This can cause the ambi-
ent temperature around the heater to exceed
the maximum rated operating temperature.
The problem can usually be solved by mount-
ing the heater at a lower height.
• Low airflow can also be caused by incorrect
rotation of the fan. Check that the fan motor is
rotating in the counterclockwise direction.
• Finally, a common solution for low airflow is to
remove any objects located too close to the
inlet or outlet.
13
Advertisement
Troubleshooting
