Page 15
TABLE 5 Continued
TABLE 5 Continued
Code
Diagnostic Codes/Status of Equipment
Action Required to Clear and Recover
E312 Restricted air flow in cooling or continu
-
ous fan mode is lower than cfm setting.
Warning Only. Restricted airflow - Indoor blower is running at a re
-
duced 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 ex
-
ternal static pressure). Check filter and duct system. To clear, re
-
place filter if needed or repair/add duct. Cleared after the current
service demand is satisfied.
E313
Indoor or outdoor unit capacity mismatch.
Communication only.
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 pa
-
rameters. Alarm will clear when commissioning is exited. Cleared
after commissioning is complete.
E331
Global network connection - Communica-
tion link problem.
For Future Use.
E334 Relay “Y1” stuck on interated control.
Replace integrated control.
E347 No 24 Volt output on Y1 of ”integrated
control” with non communicating outdoor
unit.
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.
E348 No 24 Volt output on Y2 of ”integrated
control” with non?communicating outdoor
unit.
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.
E349 No 24 Volts between R & O on ”integrated
control” with non communicating outdoor
unit (Dual fuel module required for heat
pump application
Configuration link R to O needs to be restored. Replace link or hard-
wire. Applicable in non communicating mode. Critical Alert.
E370
Interlock switch sensed open for 2 min-
utes.
Control sees the loss of 24VAC for 2 minutes.Terminate all services
and wait for interlock switch to close. The alarm will clear when
24VAC is continuously sensed on DS terminal for a minimum of 10
seconds or on a power reset.
E400
LSOM - Compressor internal overload
tripped.
Thermostat demand Y1 is present; but, compressor is not running.
Check power to outdoor unit. Clears the error after current is sensed
in both RUN and START sensors for at least 2 seconds, or after
service is removed, or after power reset.
E401
LSOM Compressor long run cycle or low
system pressure.
Compressor ran more than 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.
E402
LSOM - Outdoor unit system pressure
trip.
Discharge or suction pressure out-of-limits, or compressor over-
loaded. Clears the error after 4 consecutive normal compressor run
cycles.
E403
LSOM - Compressor short-cycling. .(Run-
ning less than 4 minutes). Outdoor unit
pressure trip
Compressor runs less than 3 minutes to satisfy a thermostat de
-
mand. Clears the error after 4 consecutive normal run cycles or
power reset.
E404
LSOM - Compressor rotor locked. Com-
pressor short-cycling. (Running less than
4 minutes).
Compressor rotor locked up due to run capacitor short, bearings
are seized, excessive liquid refrigerant, etc. Clears the error after 4
consecutive normal run cycles or after power reset.
E405
LSOM - Compressor open circuit.
Compressor circuit open (due to power disconnection, open fuse,
etc.) Clears the error after 1 normalcompressor run cycle.
