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Code
Diagnostic Codes / Status of Equipment
E312
Restricted airflow in cooling or continuous fan mode
is lower than CFM setting.
E313
Indoor or outdoor unit capacity mismatch.
Communication only.
E331
Global network connection - Communications link
problem.
E347
No 24 Volt output on Y1 of "integrated control" with
non-communicating outdoor unit.
E348
No 24 Volt output on Y2 of "integrated control" with
non-communicating outdoor unit.
E349
No 24 Volts between R & O on "integrated control"
with non-communicating outdoor unit (dual fuel
model required for heat pump application).
E401
LSOM - Compressor long run cycle or low system
pressure.
E402
LSOM - Outdoor unit system pressure trip.
E403
LSOM - Compressor short-cycling (Running less
than 4 minutes). Outdoor unit pressure trip.
E404
LSOM - Compressor rotor locked. Compressor
short-cycling. (Running less than 4 minutes.)
E405
LSOM - Compressor open circuit.
E406
LSOM - Compressor open start circuit.
E407
LSOM - Compressor open run circuit.
E408
LSOM - Compressor contactor is welded.
507029-05
Action Required to Clear and Recover
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.
Incorrect indoor/outdoor capacity code selected. Check
for proper configuring in installation instructions. Alarm
is just a warning. The system will operate, but might
not meet efficiency and capacity parameters. Alarm will
clear when commissioning is complete.
For Future Use.
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. Applicable in non-communicating
mode. Critical Alert.
Compressor ran more that 18 hours to satisfy a single
thermostat demand. Critical Alert. Clears the error after
30 consecutive normal run cycles or power reset. Also
monitors low pressure switch trips.
Discharge or suction pressure out-of-limits, or
compressor overloaded. Clears the error after 4
consecutive normal compressor run cycles.
Compressor runs less than 3 minutes to satisfy a
thermostat demand. Clears the error after 4 consecutive
normal run cycles or power reset.
Compressor rotor locked up due to run capacitor short,
bearings are seized, excessive liquid refrigeration, etc.
Clears the error after 4 consecutive normal run cycles
or power reset.
Compressor circuit open (due to power disconnection,
open fuse, etc.) Clears the error after 1 normal
compressor run cycle.
Required amount of current is not passing through Start
current transformer. Clears the error after current is
sensed in START sensor, or after power reset.
Required amount of current is not passing through
Run current transformer. Clears the error after current
is sensed in RUN sensor, or 1 normal compressor run
cycle, or after power reset.
Compressor runs continuously. Clears the error after 1
normal compressor run cycle or after power reset.
Issue 2241
Page 63 of 73
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