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Integrated Control Diagnostic Codes (continued)
Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover
E 295
Indoor blower motor temperature is too high. Indoor blower motor over temperature (motor
tripped on internal protector), Check motor bear-
ings, amperes. Replace if necessary.
E 310
Discharge error sensor failure − No error if disconnected. Only shown if
shorted or out−of−range.
Discharge air temperature(DATS) out of range,
code is activated during "Field test mode".
E 311
Heat rate reduced to match indoor blower air flow. Replace filter or repair
duct restriction.
Furnace blower in cutback mode due to restricted
airflow. Check filter and ductwork. To clear replace
filter if needed or repair/ add ductwork.
E 312
Restricted air flow in cooling or continuous fan mode is lower than cfm
setting.
Restricted airflow − Indoor blower is running at a
reduced cubic feet per minute (Cutback Mode) −
The variable speed motor has pre−set speed and
torque limiters to protect the motor from damage
caused by operating out of its designed parameters
(0 to 0.8 inches water column total external static
pressure). Check filter and ductwork. To clear re-
place filter if needed or repair/ add ductwork.
E 313
Indoor or outdoor unit capacity mismatch. Incorrect Indoor /outdoor capacity code selected.
Check for proper configuration in installation instruc-
tions. Alarm is just a warning. The system operation
is not impacted at all and alarm would clear when
Commissioning is exited.
E 331
Global network connection − Communication link problem. For Future Use.
E 347
No 24 Volt output on Y1 to C with non−communicating outdoor unit. Y1 relay / Stage 1 failed (Pilot relay contacts did not
close or the relay coil did not energize).
E 348
No 24 Volt output on Y2 to C with non−communicating outdoor unit. Y2 relay / Stage 2 failed (Pilot relay contacts did not
close or the relay coil did not energize).
E 349
No 24 Volts between R & O with non−communicating outdoor unit (Dual
fuel module required for heat pump application).
Configuration link R to O needs to be cut on control
board.
E 401
LSOM − Compressor ran more than 18 hours in air conditioning mode. Compressor protector is open. Check for high head
pressure, check compressor supply voltage. Out-
door unit power disconnect is open , compressor
circuit breaker or fuse(s) is open, broken wire or
connector is not making contact. Low or high pres-
sure switch open if present in the system. Compres-
sor contactor has failed to close.
E 402
LSOM − Outdoor unit system pressure trip. Compressor ran over 18 hours in air conditioning
mode.
E 403
LSOM − Compressor short−cycling (Running less than 4 minutes). Outdoor unit pressure trip. Check dirty coil, fan mo-
tor, refrigerant charge.
E 404
LSOM − Compressor rotor locked. Compressor short cycling (Running less than 4 min-
utes).
E 405
LSOM − Compressor open circuit. Check capacitor, wiring, hard start kit , replace com-
pressor.
E 406
LSOM − Compressor open start circuit. Check compressor for hot (cool down) , check pres-
sures, fan motor etc. Replace compressor if unable
to get circuit to close and compressor to operate.
E 407
LSOM − Compressor open run circuit.
E 408
LSOM − Compressor contactor is welded.
E 409
LSOM − Compressor low voltage. Replace contactor.