Allied A96US2V - Integrated Control Diagnostic Codes (E291-E370)

507404-02 Page 71 of 80Issue 1448
Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover
E291 Heat airow restricted below the mini-
mum.
Check for dirty lter and airow restriction. Check blower performance.
1-hour soft lockout. Cleared when heat call nishes successfully.
E292 Indoor blower motor unable to start
due to obstructed wheel seized bear-
ings.
Indoor blower motor unable to start (seized bearing, stuck wheel, etc.)
Replace motor or wheel if assembly does not operate or meet perfor-
mance standards. 1-hour soft lockout. Clears after circulator success-
fully starts.
E294 Combustion air inducer over current. 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.
E295 Indoor blower motor temperature is
too high.
Indoor blower motor over temperature (motor tripped on internal protec-
tor). Check motor bearings and amps. Replace if necessary. Cleared
after blower demand is satised.
E310 Discharge error temperature sensor
failure. Only shown if shorted or out
of range.
Compare discharge sensor resistance to temperature resistance charts
in installation instructions.. Replace sensor if necessary. Cleared in
Communicating mode 30 seconds after fault recovered. In Non-Com-
municating mode cleared after the current heat call is completed.
E311 Heat rate reduced to match indoor
blower airow.
Warning Only. Furnace blower in cutback mode due to restricted
airow. Reduce ring rate every 60 seconds to match available CFM.
Check lter and duct system. To clear replace lter if needed or repair/
add duct. 2-stage controls will reduce ring rate to 1-stage. Clears
when heat call nished successfully.
E312 Restricted airow in cooling or con-
tinuous fan mode is lower than CFM
setting.
Warning Only. Restricted airow - 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 external
static pressure). Check lter and duct system. To clear, replace lter if
needed or repair/add duct. Cleared after the current service demand is
satised.
E313 Indoor or outdoor unit capacity mis-
match. Communication only.
Incorrect indoor/outdoor capacity code selected. Check for proper con-
guring in installation instructions. Alarm is just a warning. The system
will operate, but might not meet efciency and capacity parameters.
Alarm will clear when commissioning is complete.
E331 Global network connection - Commu-
nications link problem.
For Future Use.
E334 Relay "Y1" stuck on integrated control. Replace integrated control.
E347 No 24 Volt output on Y1 of "integrated
control" with non-communicating out-
door 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 out-
door 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-commu-
nicating outdoor unit (dual fuel model
required for heat pump application).
Conguration 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
minutes.
Control sees the loss of 24VAC for 2 minutes. Terminate all ser-
vices and wait for interlock switch to close. e alarm will clear
when 24VAC is continuously sensed on DS terminal for a mini-
mum of 10 seconds or on a power reset.
Integrated Control Diagnostic Modes (Continued)