United States Stove Company 4840 Mode D'emploi page 13

• Disconnect the power cord before performing any maintenance! NOTE: Switching the appliance to "OFF"
does not disconnect all power to the electrical components of the heater.
• Never try to repair or replace any part of the heater unless instructions for doing so are given in this manual or
supplied from the factory. All other work should be done by a trained technician.
PROBLEM
Orange, lazy flame, excessive fuel
build-up in the burn pot
PROBLEM
Fire goes out or heater shuts down.
PROBLEM
Heater does not start a fire when the
"ON" button is pushed
PROBLEM
Heater enters shut-down mode
The air inlet, burnpot,
combustion air chambers, combustion
blower, or exhaust pipe are blocked
with ash or foreign material.
Pressure switch hose
attachment pipes for
blocked.
The firebox is not properly sealed.
Vent pipe is incorrectly installed
The pressure switch wire connections
are bad.
Combustion blower failure.
Control board not sending power to
combustion blower.
Control board not sending power to
pressure switch.
Pressure switch has failed.
Trouble Shooting Errors
CAUSE: To rich air/fuel mixture
Clean out the burn pot and behind the cleanout door.
Make sure that the combustion door is closed and sealed properly. If not, adjust
door catch and/or replace door gaskets.
Check that the exhaust is clear of any obstructions. Clean as needed
Check for proper seating of the burn pot.
CAUSE: Burn pot burns out of fuel
Hopper is empty, refill the hopper.
Loss of draft pressure. Make sure that the combustion door is closed and sealed
properly. If not, adjust door catch and/or replace door gaskets. Check that the
exhaust is clear of any obstructions. Clean as needed.
Make sure the viewing door and hopper lid is closed completely.
Auger system is jammed or there is a "bridging" of the fuel in the hopper, preventing
fuel from flowing into the auger feed system.
CAUSE: Auto-Start Igniter fails to ignite the fuel in the burn pot.
Turn the heater "OFF". Clear the unburnt fuel from the burn pot and try again.
Check the pellet quality. Replace if moist, wet, or dirty.
Loss of draft pressure. Make sure that the combustion door is closed and sealed
properly. If not, adjust door catch and/or replace door gaskets. Check that the
exhaust is clear of any obstructions. Clean as needed.
Check that the auto-start igniter is not blocked with ash or soot. (The igniter is
located behind the burn pot on the back wall of the combustion chamber.)
The auto-start igniter gets "red hot" during start-up. If you can not visibly see the
igniter glowing during start-up, then the igniter may need to be replaced or there is
a problem with the electrical control system.
Check for proper alignment between the burn pot and the igniter tube.
CAUSE: Heater has reached the 2nd over temperature limit.
To much fuel in the burn pot. Restart heater after heater has cooled.
RTD sensor in the room discharge air may be faulty causing the room fan not to
come on. Contact your dealer.
interior
Follow all cleaning procedures in the maintenance section of the owner's manual.
or stove Unhook air hose from the pressure switch and blow through it. If air flows freely, the
hose are hose and tube are fine. If air will not flow through the hose, use a wire coat hanger
to clear the blockage.
Make sure the door is closed and that the gasket is in good shape.
Check to make sure vent pipe installation meets criteria in owner's manual.
Check the connectors that attach the wires to the pressure switch.
With the stove on, check to see if the combustion blower is running. If it is not, you
will need to check for power going to the combustion blower. It should be a full
current. If there is power, the blower is bad.
If there is no current going to the combustion blower, check all wire connections
and fuse. If all wires are properly connected, you have a bad control board.
There should be a 5-volt current (approximately) going to the air switch after the
stove has been on for 30 seconds.
To test the pressure switch, you will need to disconnect the air hose from the body
of the stove. With the other end still attached to the pressure switch, very gently
suck on the loose end of the hose (you may want to remove the hose entirely off
the stove and the pressure switch first and make sure it is clear). If you hear a click,
the air switch is working. BE CAREFUL too much vacuum can damage the air switch!
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