Trouble Shooting; Error Codes; Flashing Indicators; Notes - United States Stove Company 8500 Owner's Manual

Trouble Shooting

Disconnect the power cord before performing any maintenance! NOTE: Turning the ON/OFF Switch to "OFF"

does not disconnect all power to the electrical components of the furnace.
Never try to repair or replace any part of the furnace unless instructions for doing so are given in this manual.

All other work should be done by a trained technician.
PrOBLEM CAUSE: Too rich air/fuel mixture
Orange, lazy flame, excessive fuel • Clean out the burnpot and burnpot housing
build-up in the burnpot
• Adjust the air damper on the front of the furnace to an open position.
• Make sure that the viewing door is closed and sealed properly. If not,
check door gasket..
• Check that all outside connections are clear of any obstructions.
• Check the exhaust system; clean as needed.
PrOBLEM CAUSE: Burnpot burns out of fuel
Fire goes out or furnace shuts down. • Hopper is empty, refill the hopper.
• Loss of draft pressure. Make sure that the viewing door is closed and
sealed properly. Check that all outside connections are clear of any
obstructions. Check the exhaust system; clean as needed.
• Check that the pressure switch connection to the firebox is free of ash or
clear of obstructions.
• Auger system is jammed or there is a "bridging" of the fuel in the hopper,
preventing fuel from flowing into the auger feed system.
• Stove may be shutting down due to an over temperature condition.
PrOBLEM CAUSE: Not enough combustion air; Fuel has too much moisture.
Viewing window becoming black • Adjust the air damper to a more open position.
shortly after start-up.
• Use a fuel with less moisture content
PrOBLEM CAUSE: Not enough combustion air; Fuel has too much moisture.
"Black Popcorn" is present in the burn • Adjust the air damper to a more open position.
chamber.
• Use a fuel with less moisture content
• Stove might be cycling excessively due to temperature cut backs.
• Reduce heat setting
PrOBLEM CAUSE: Chemical reaction between the starch in corn and the heat.
"Clinkers" form in burnpot. • Add calcium carbonate (aka chicken scratch or oyster shell).
• Adjust air mixture
• Use corn with less moisture or starch.
PrOBLEM CAUSE: Unit is reaching the "Almost Over-temp" preset.
Unit cycles up and down when on the • Adjust the heat range to lower setting.
"HIGH" heat setting.
• Fuel burns hot causing the furnace to cycle between high setting and
lower settings.
PrOBLEM CAUSE: Corn is wet or it has a very high moisture content.
Corn builds up and is not burning com- • Use corn with a moisture content of 11% or less for best results.
pletely. Steam is coming from the corn.
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Below is a chart describing the Error Codes that might be displayed if an error occurs with your furnace.
Error Error
Code Description
Err1 The high limit temperature sensor
has tripped.
Err2
Furnace ran out of fuel during normal
operation.
Err3 The furnace was unable to reach the
Room Fan On temperature within the
startup time.
Err4 The power failed while the furnace was
hot, and when power was restored,
the fire was out.
Err5 The Auger output fuse has blown.
Err6 The Agitator output fuse has blown.
Err7 The Draft Fan (Exhaust Fan) output
fuse has blown.
Err8 The Room Fan blower output fuse has
blown.
Several situations or events are indicated in normal operation by blinking display indicators or segments in the display:
Flashing On indicator : This means that the furnace is in the "Lighting" state waiting for either a 3 minute timeout to
begin burning or for the furnace to reach the pre-set temperature whichever comes first.
Flashing Off indicator : This indicates that the furnace is in the "Shutdown" state waiting for the OFF button, or for a
15 minute period after the furnace was turned off, or for the furnace to cool down, or for the door to be closed.
Flashing dash "-" in heat range Display : This indicates that the furnace is in the normal run mode and is ramping
from the current heat range setting to the target heat range setting. Once the ramp is complete, the "-" will stop flashing.
For ramping from heat range 1 to 3, the default time is 90 seconds between internal settings.
Flashing Automatic Mode indicator : This indicates that the furnace is in normal operation and is running in the auto-
matic mode. However, either the Draft Fan or Auxiliary setting is manually configured.
Flashing Draft Fan Setting indicator : This indicates that the furnace is in normal operation and that the vacuum sen-
sor detects a loss of pressure either because the door is open or because there is a negative pressure in the room with
respect to the exhaust.
Flashing heat range Setting indicator : This indicates that the furnace is in normal operation and that an over-
temperature condition exists causing the fuel to stop.
Flashing Auger Delay indicator : This indicates that th e furnace is in normal operation and that the hopper lid is open.
USSC USSC

Error Codes

Possible
Causes
• Inadequate ventilation.
• Room fan failure.
• Exhaust Blockage.
• Electrical Open in the over temperature switch or wiring.
• Hopper Empty.
• Auger output failure or jam.
• Flame of fuel quality caused fire to burn too slowly or go out.
• Electrical Open in low temperature switch or wiring.
• Flame or Fuel quality caused the fire to burn too slowly or go
out.
• Auger output failure or jam Hopper empty on startup.
• Electrical Open in low temperature switch or wiring.
• Power loss
• Electrical Open in low temperature switch or wiring.
• Auger motor jammed or bad.
• Agitator motor jammed or bad.
• Draft Fan motor jammed or bad.
• Room fan motor jammed or bad.

Flashing Indicators

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