Table of Contents
Advertisement
5.0
Maintenance
•
Troubleshooting Guide
5.0
Maintenance
Troubleshooting Guide
Turn up thermostat/controller.
Does the fan
No
blower turn on?
Yes
Find the source of the electrical problem between panel and heater.
Find the source of the
electrical problem
between panel and
external transformer.
Controller/external
transformer is faulty and
must be replaced.
Does the unit spark?
Yes
Do both burners light?
Yes
No
Continued on page 38
Is the power at the
heater 120V?
No
Is there 120V on the
primary side of the
No
controller/external
transformer?
Yes
Is there 24V on the
No
secondary side of the
external transformer?
Yes
thermostat/controller?
Is there 24V at the blue and yellow
No
secondary side of the internal transformer
and common on the pressure switch?
Check wire connection to primary
of the transformer. If good,
replace faulty transformer.
No
Is the ball valve/shut-off
in the ON position?
Does the amber light
No
illuminate?
Yes
Yes
Check the power across the
No
green and white wires of the
The thermostat/controller or wiring is
faulty and should be replaced or repaired.
Yes
Is there 24V to the
No
No
Yes
Are the igniter(s)
physically damaged?
36
QTD
yellow control cord.
Is there 24V power?
Find source of electrical
problem between
No
the external transformer
and thermostat/controller.
Is there 24V at the
N.O. terminal of the
Yes
pressure switch?
No
Is the inlet or the outlet
of the unit plugged or
obstructed?
Yes
Turn On.
Remove obstruction.
Replace damaged
Yes
igniter(s).
Series
Yes
Yes
No
Advertisement
Table of Contents
