Lennox Hearth T300P 사용자 설명서

Page 29 

1. Fire burns with 

a lazy orange 

flame. Pellets 

build up in the 

grate and the 

window gets 

sooted up. 

 

There is insufficient combustion air. 

 

Remove any clinkers or ash from the bottom of the grate that 

might be obstructing the primary air holes.  

 

Change to a better grade of fuel if necessary. 

 

Check that the damper has been opened enough for the 

amount of fuel feed. 

 

Check that the heat exchange tubes are not coated with ash. 

 

Clean internal exhaust ducts. 

 

Check gasket seal around the door. Use a thin strip of paper, 

1 in. wide. Open the door and close it on the paper strip. A 

slight friction should be felt when the paper strip is pulled. 

Repeat this process at various locations around the door 

gasket.  Replace the door gasket if necessary. 

 

Check for blockage in the air inlet tube or exhaust pipe. 

Clean as necessary. 

 

Close ash slide plates. 

 

Have your authorized Lennox Hearth Products dealer check 

your Exhaust Blower. 

 

2. Fire goes out 

or stove shuts 

down automati-

cally 

 

The hopper is empty 

 

Pellets are not feeding.  

 

The high limit temperature switch 

has tripped. 

 

There is too much combustion air 

for the amount of fuel. 

 

Refill hopper. 

 

See Pellets will not feed (#3) below. 

 

Allow stove to cool for 1 hour and re-light. If the stove has 

been operating at a medium to high burn rate and the room 

air blower has been turned down low then the fan should be 

turned up higher. If this problem persists (particularly at 

lower burn rates) then the high limit disc should be replaced 

by your authorized Lennox Hearth Products dealer. 

 

Adjust the damper to reduce combustion airflow. 

 

3. Pellets will not 

feed. 

 

Stove has run out of fuel. 

 

The auger motor or circuit board 

may be defective. The pressure 

switch tap or hose may be blocked.  

 

 

Back pressure in venting tripping 

pressure switch. 

 

 

 

 

Thermostat is in stand-by mode. 

 

 

Thermostat wires disconnect. 

 

High limit switch may have been 

tripped. 

 

Self-aligning bearing in auger motor 

may be mis-aligned. 

 

Refill hopper. 

 

Check to be sure that there is no blockage in the pressure 

tap or hose. Have your authorized Lennox Hearth Products 

dealer diagnose the problem and clean or replace any nec-

essary parts. 

 

If new installation check for excessive 90˚ bends, long hori-

zontal runs or excessive vertical run of 3” pipe. Possibly 

change to 4” pipe. If older installation check for excessive 

ash accumulation in pipe or other obstructions. Clean out 

pipe. 

 

Check to see if thermostat is set to low or if sun is shining 

directly on thermostat. 

 

Re-install wires. 

 

Allow stove to cool. Increase room air blower setting. 

 

 

 

Gently tap the auger motor.