Napoleon NPS45 Installation And Operating Instructions Manual page 52

52
SYMPTOM
CONVECTION BLOWER SHUTS OFF AND COMES BACK ON
The convection blower is
overheating and tripping
the high limit switch
Electronic control panel
malfunction.
APPLIANCE WILL NOT FEED PELLETS BUT AUGER LIGHT COMES ON
Fuse on control board blew
High limit switch has
tripped or is defective.
Defective auger motor.
Auger jam.
Loose wire or connector.
SOOT ACCUMULATES ON GLASS AT A FAST RATE - FLAME IS LAZY, DARK AND HAS BLACK TIPS
AFTER APPLIANCE HAS BEEN ON FOR AWHILE, THE BURNPOT OVERFILLS
Appliance or vent pipe is
dirty, which restricts airfl ow
through the burnpot
Vent pipe is installed
improperly.
Burnpot holes are blocked.
Blockage in air intake pipe
Circuit board malfunction
Poor quality pellets
(applies to SOOT
ACCUMULATES ON
GLASS AT FAST RATE
only).
The trim setting of the
combustion blower on
the high feed rate is too
low (applies to SOOT
ACCUMULATES ON
GLASS AT FAST RATE
only).
VERY ACTIVE FLAME ON PILOT (LOW FEED)
Flame is very aggressive
on low feed setting,
consumption of pellets
seem to be high.
HIGH LIMIT SWITCH KEEPS TRIPPING
The convection blower is
overheating and tripping
the high limit switch.
Power surge or brown-out
situation.
High limit switch is
malfunctioning.
W415-0702 / B / 04.04.12
- Try lubricating the convection blower and clean any dust off the windings and fan
blades. If lubricating the blower does not help, the blower may be defective.
- Test the current going to the convection blower. If there is no power being sent to the
blower when it shuts off during operation, the control board is defective.
- Remove the control board. If the fuse appears to be defective, replace it with a 0.5
amp. 125 volt fuse. Plug the appliance back in and try to run the unit.
- Wait 30-45 minutes for the appliance to cool and it should function normally. If it
does not, unplug the appliance and temporarily bypass the high limit switch by
disconnecting the two brown wires and connecting them together with a short piece
of wire. Plug the appliance back in. If the appliance comes back on and works, you
need to replace the high limit switch. CAUTION: This is for testing only! Do not
run the appliance with this switch bypassed!
- Remove the auger motor from the auger shaft and attempt to run the unit. If the
motor turns then the shaft is jammed into something. If the motor will not turn, it is
defective.
- Empty the hopper and inspect
- Refer to the "IN THE EVENT OF A JAMMED AUGER" section in the manual.
- Inspect all wires and connectors to the auger motor, high limit switch and the Molex
connector.
- Follow all cleaning procedures in the maintenance section of the manual.
- Refer to the "VENTING" section in the manual to determine where the venting
system is installed incorrectly.
- Remove the burnpot and thoroughly clean it.
- Visually inspect the air intake pipe that leads into the burnpot for foreign material
- Time the fuel feed light at each setting (after the appliance has completed the start-
up cycle). If auger motor runs constantly, the board is defective
- The brand of pellets or batch of pellets that are being used may be of poor quality.
If possible, try a different brand of pellets. You might also want to try a brand that is
made from a different type of wood (softwood vs. hardwood). Different woods have
different characteristics when being burned.
- Press and hold the auger feed button and the fan up to increase the combustion fan
setting. If the #1 light is on, the appliance is currently on the lowest trim setting. If
only the #3 light is on, the appliance is in the default setting. If the #5 light is on, the
appliance is in the high trim for the combustion fan setting. If the appliance is being
burned on one of the lower settings, advance to the next trim setting and try burning
the appliance.
- Press and hold the auger feed button and the heat down to decrease the low feed
rate setting. If only the #3 light is on, the appliance is in the default setting. Trim the
feed rate down one setting, #2 light will be on. Trimming down #2, the #1 light will be
on. Try burning the appliance.
- Clean any dust from the winding and fan blades. If cleaning the blower does not
help, the blower may be defective
- A power surge, spike, or voltage drop could cause the high limit switch to trip.
Check to see if a surge protector is being used on the appliance. If not, it is highly
recommended.
- If no other problems are found, replace the high limit switch.
TEST SOLUTION
42.24_3A