Install Instructions

45
T ROUBLESHOOTING C HART T ROUBLESHOOTING C HART
Symptom LED Status Fault Description Corrective Actions

Equipment lacks shared data Populate shared data set using memory card

Normal operation None
Furnace f ails to operate
Integrated control module LED
display provides no signal
None
No 115 power to furnace or no 24 volt
power to integrated control module
Blown fuse or tripped circuit breaker
Integrated control module is non-
functional
Restore high voltage power to furnace and integrated control
module.
Replace non-f unctional integrated control module.
Furnace f ails to operate

Circulator blower motor is not running
when it should be running
Tighten or correct wiring connection
Verify continuous circuit through inductor
Replace if open or short circuit
Check circulator blower motor, replace if necessary
Furnace f ails to operate

Integrated control module has lost
communications with circulator blower
motor
Tighten or correct wiring connection
Check circulator blower motor. Replace if necessary
Check integrated control module, replace if necessary
Furnace f ails to operate

Circulator blower motor horse power in
shared data set does not match
circulator blower motor horse power.
Verify circulator blower motor horse power match with
nameplate, replace if necessary
Verify shared data set is correct for the specific model, re-
populate data using correct memory card if required
Furnace operates at reduced
performance
Airflow delivered is less than
expected

Circulator blower motor is operating in
a power, temperature, or speed limiting
condition
Check filters for blockage, clean filters or remove
obstruction
Check ductwork for blockage and verify all registers are
fully open
Verify ductwork is appropriately sized for system, resize
and/or replace ductwork if necessary
Furnace f ails to operate

Circulator blower motor senses a loss
of rotor control
Circulator blower motor senses high
current
Check filters, filter grille, registers, duct system and
equipment inlet/outlet for blockage, make necessary
corrections and retest
Furnace f ails to operate

Circulator blower motor f ails to start 10
consecutive times
Check circulating blower for obstructions
Repair or replace blower motor or wheel as required
Check circulating blower shaf t for proper rotation
Furnace f ails to operate

Circulator blower motor shuts down for
over or under voltage condition
Circulator blower motor shuts down
due to over temperature condition on
power module
Check voltage to f urnace and verify within nameplate
specified range
Furnace f ails to operate

Circulator blower motor lacks
information to operate properly
Motor fails to start 40 consecutive times
Check for locked rotor condition
Check integrated control module and verify it is populated
with the correct shared data