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| Troubleshooting
Chapter 9
|
9-57
304243H02
Table 6 Troubleshooting
Problem
Furnace temperature
runs away.
Furnace does not heat.
Solution
Check solid-state relay:
Remove the controller from the furnace.
Connect power to the furnace. If the heating unit heats,
replace the solid-state relay.
Front panel red indicator light is on:
If the controller output light is off, check that the setpoint
temperature is higher than the furnace display temperature.
If the output light is on, disconnect power from the furnace
and check the heating elements for continuity.
Front panel red indicator light is off:
Check that the power switch is on.
Check that the indicator lights on the controller display are
on.
Check that the furnace door is fully closed.
Check that the door interrupt switch at the middle front of the
furnace is engaged when the furnace door is fully closed.
Check the electrical wires for visible damage.
Replace the electrical wires if necessary. This should be
done by trained technician.
Check that the Alarm Setpoint on the controller is set higher
than the operating temperature.
.
Contact your supplier
Mini-mite Tube Furnace
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