Napoleon NPS45 Installation And Operating Instructions Manual page 51

SYMPTOM
Appliance SHUTS OFF AND THE #3 LIGHT FLASHES
The hopper is out of
pellets
The hopper lid is open.
The burnpot is not seated
completely into the burner
housing.
The burnpot holes are
blocked
The air inlet,the interior
chambers, or the exhaust
system has a partial
blockage.
The auger shaft is
jammed.
The auger motor has
failed.
The low limit switch has
malfunctioned.
The fuse on the control
board has blown.
The control board is not
sending power to the low
limit switch or other auger
system components.
Flame has gone out in
burn pot while at feed
rate 1. A few unburned
pellets are in the pot.
APPLIANCE SHUTS OFF AND #4 .LIGHT FLASHES.
The high limit switch has
tripped.
APPLIANCE FEEDS PELLETS BUT WILL NOT IGNITE
Blockage in igniter tube
or inlet for the ignitor
tube.
The burnpot is not seated
completely into the burner
housing.
Defective ignitor.
The control board is not
sending power to the
ignitor.
SMOKE SMELL IS COMING BACK INTO THE HOME
There is a leak in the vent
pipe system.
The gasket on the
combustion blower has
deteriorated.
- Refi ll the hopper.
- Close the hopper lid
- Insure the burnpot locating notch engages with the ignitor and that the burnpot sits
fl at.
- Remove the burnpot and thoroughly clean it.
- Follow all cleaning procedures in the maintenance section of the manual.
- Start by disconnecting the power supply and emptying the hopper.
- The auger shaft may be jammed. For more information see "IN THE EVENT OF A
JAMMED AUGER" section.
- Remove the auger motor from the auger shaft and try to run the unit. If the motor
will turn, the shaft is jammed on something. If the motor will not turn, the motor is
defective.
- Temporarily bypass the low limit switch by disconnecting the two brown wires and
connecting them together with a short piece of wire, then plug the appliance back in.
If the appliance comes back on and works, you need to replace the low limit switch.
CAUTION: This is for testing only! Leaving the switch bypassed will cause the
blowers to remain on constantly and the auger will continue to feed even if the fi re is
out. Do not operate the unit with the low limit switch bypassed.
- Remove the control board. If the fuse appears to be defective, replace it with a 5
amp 125 volt fuse. Plug the appliance back in and try to run the unit.
- There should be an approximate 5 volt current going to the low limit switch after the
appliance has been on for 10 minutes.
- Feed rate is too low for the quality and moisture content of pellet fuel that is being
used. Adjust trim of combustion blower down or auger motor up.
- This is a manual reset switch but should only be done by a qualifi ed technician once
the cause of failure has been determined.
- Ensure that the air intake hole is clear, it is located on the side of the igniter housing
on the back of the fi rewall.
- Place the burnpot so that the locating notch engages with the ignitor and the burnpot
is sitting fl at.
- Put power directly to the ignitor and observe the tip of the ignitor from the front of
the appliance. Within two minutes the tip should glow, if it does not, the ignitor is
defective.
- Check the voltage going to the ignitor during start up. It should be at full current (115
volts). If the voltage is lower than full current, check for problems with the wiring. If no
problems are found, the board is defective.
- Inspect all the vent pipe connections. Make sure they are sealed with RTV silicone
that has a temperature rating of 500°F or higher. Seal joints with UL-181-AP foil tape
and insure the square to round adapter piece on the combustion blower has been
properly sealed with the same RTV.
- Inspect both gaskets on the combustion blower to make sure they are in good shape.
Replace if necessary.
TEST SOLUTION
51
42.24_2A
W415-0702 / B / 04.04.12