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Code
Diagnostic Codes / Status of Equipment
E292
Indoor blower motor unable to start due to
obstructed wheel seized bearings.
E294
Combustion air inducer over current.
E295
Indoor blower motor temperature is too high.
E310
Discharge error temperature sensor failure. Only
shown if shorted or out of range.
E311
Heat rate reduced to match indoor blower airflow.
E312
Restricted airflow in cooling or continuous fan mode
is lower than CFM setting.
E347
No 24 Volt output on Y1 of "integrated control" with
outdoor unit.
E348
No 24 Volt output on Y2 of "integrated control" with
outdoor unit.
E349
No 24 Volts between R & O on "integrated control"
with outdoor unit (dual fuel model required for heat
pump application).
31-5000723 Rev. 0
Action Required to Clear and Recover
Indoor blower motor unable to start (seized bearing,
stuck wheel, etc.) Replace motor or wheel if assembly
does not operate or meet performance standards.
1-hour soft lockout. Clears after circulator successfully
starts.
Check combustion blower bearings wiring and
amps. Replace if does not operate or does not meet
performance standards. Clears after inducer current is
sensed to be in-range after the ignition following the soft
lockout or reset.
Indoor blower motor over temperature (motor tripped
on internal protector). Check motor bearings and amps.
Replace if necessary. Cleared after blower demand is
satisfied.
Compare discharge sensor resistance to temperature
resistance charts in installation instructions. Replace
sensor if necessary. Cleared after the current heat call
is completed.
Warning Only. Furnace blower in cutback mode due to
restricted airflow. Reduce firing rate every 60 seconds
to match available CFM. Check filter and duct system.
To clear replace filter if needed or repair/add duct.
2-stage controls will reduce firing rate to 1-stage. Clears
when heat call finished successfully.
Warning Only. Restricted airflow - Indoor blower is
running at a reduced CFM (Cutback Mode - The
variable speed motor has pre-set speed and torque
limiters to protect the motor from damage caused
by operating outside of design parameters (0 to 0.8"
W.C. total external static pressure). Check filter and
duct system. To clear, replace filter if needed or repair/
add duct. Cleared after the current service demand is
satisfied.
Operation stopped. Y1 relay/Stage 1 failed. (Pilot relay
contacts did not close or the relay coil did not energize;
no input back to IFC chip.) Critical Alert. Cleared after
reset and Y1 input sensed.
Y2 relay/Stage 2 failed. (Pilot relay contacts did not
close or the relay coil did not energize; no input back to
IFC chip.) Critical Alert. Cleared after reset and Y1 input
sensed.
Configuration link R to O needs to be restored. Replace
link or hardware. Critical Alert.
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