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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
bearings, 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
replace 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
instructions. 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.
Outdoor unit power disconnect is open , compres-
sor circuit breaker or fuse(s) is open, broken wire or
connector is not making contact. Low or high
pressure switch open if present in the system.
Compressor 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
motor, 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
compressor.
E 406 LSOM − Compressor open start circuit. Check compressor for hot (cool down) , check
pressures, 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.
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