USSC 5660 Installation And Operating Manual page 36

TROUBLE SHOOTING ‐ continued
Door Glass has soot buildup at a fast rate and flame is lazy with black tips.
 The vent pipe (including air intake) may be dirty or partially blocked restricting airflow to the unit.
 The intake butterfly valve might be set at too low position.(see page 15 )
 Burn pot holes are blocked. Let the unit cool and clean burn pot and burn pot liner (be sure to follow
instructions for disposal of ashes found on page 29)
 Circuit board malfunction. Time the fuel feed light at each setting (after the stove has completed the
initial "Start Up" sequence. Check the timing against the timing chart (found below), if the auger
motor runs constantly there is a problem with the circuit board
 Combustion/Exhaust blower is not operating. Check the combustion/exhaust blower is operating. If
not, bypass the exhaust temperature switch. If the motor operates, replace the exhaust temperature
switch. If the combustion/exhaust blower still does not work, apply 120 volts directly to the exhaust
blower motor. If the motor still does not work, replace the exhaust blower motor.

Poor fuel quality. The type of pellets being used may be of poor quality. If possible, try a different
brand of pellets (refer to fuel type information on page 3).
Heat level 1
Heat level 2
Heat level 3
Heat level 4
Heat level 5
Control Board Timing
Auger on 2 seconds
Auger on 3 seconds
Auger on 5 seconds
Auger on 7 seconds
Auger on 10 seconds
Auger off 5 seconds
Auger off 3 seconds
Auger off 3 seconds
Auger off 3 seconds
Auger off 3 seconds
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