24
Mini Boiler Owners Manual
2015
8.
This alarm example indicates an error has occurred to the
sensor that controls the boiler temperature.
Do not attempt
to start the burner.
Turn off the burner and check the con
-
nections for the sensor. Restart the burner. If the problem
persists, contact your dealer or Northwest Manufacturing,
Inc.
7.
The PLC also keeps track of some faults that could be use
-
ful to in the event of a problem occurring. This history shows
how many ignition errors, fuel errors and if the burner has
overheated via the temperature sensor that is placed on the
tipping chute. There are no values that can be changed in
this menu.
9.
When this alarm appears the pellet hopper is empty.
Please refill the pellet hopper with pellets. This will only ap
-
pear if you have set up a level sensor in the pellet hopper.
If you do not have a level senor in the pellet hopper, then a
FUEL FAULT will occur. See the troubleshooting section for
further assistance.
Menu/Ok
HISTORY OF FAULTS
IGNITION +00000
FUEL FAULT +00000
OVERHEATED +00000
1
2
3
4
Menu/Ok
NO PELLETS
1
2
3
4
Menu/Ok
SENSOR FAULT
1
2
3
4
Alarm (The display shows a message and the burner has turned off.)
Operation
10.
When this alarm appears on the burner turn the power
off to the burner once the combustion fan has stopped. Al
-
low the boiler to cool and clean the boiler. Check the heat
exchanger tubes and clean if they are dirty. Turn the burner
back on and reset it. To reset the burner hold down button
4 until the PLC is reset. If the problem persists, there could
be a lack of proper draft. Contact your dealer or Northwest
Manufacturing, Inc. or see the troubleshooting section for
further assistance.
Menu/Ok
OVERHEATED
V22
1
2
3
4