Operating instructions

60
Operation
Troubleshooting guide.
Problem
number
Problem Possible cause Action
20
21
22
23
Flue fault
Burner # fault
Ignitor # fault
Blower # fault
 The combustion air
damper is incorrectly
wired or has failed to
open.
 The power vent
pressure switch is
incorrectly wired or
the power vent has
failed to start.
 No gas supply to unit
 Gas valve is off or
there is no power to
the valve.
 Broken ignitor
 Gas valve/ignitor/
sensing electrode is
out of sequence
 Gas valve outlet
pressure is too low.
 Blower inlet is dirty
or obstructed.
 Broken ignitor
 Gas valve/ignitor/
sensing electrode is
out of sequence.
 The blower is
incorrectly wired or
the blower failed to
start.
 Check for proper combustion air
damper wiring.
 Check for proper power vent wiring.
Verify that gas service valve is on and
receiving minimum pressure to
manifold per rating plate.
 Verify that valve is in on position and
that there is power to the valve.
 Verify that ignitor glows.
 Verify wire connections to these
components.
 Verify out pressure is set per rating
plate.
 Clean inlet and check for obstructions.
 Verify that ignitor glows.
 Verify wire connections to these
components.
 Check for proper blower wiring.
More on next page ...
Operation:
Troubleshooting guide