Allied Air A96US2V Installation Instructions Manual page 71

Integrated Control Diagnostic Modes (Continued)
Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover
E291 Heat airflow restricted below the mini-
mum.
E292 Indoor blower motor unable to start
due to obstructed wheel seized bear-
ings.
E294 Combustion air inducer over current.
E295 Indoor blower motor temperature is
too high.
E310 Discharge error temperature sensor
failure. Only shown if shorted or out
of range.
E311 Heat rate reduced to match indoor
blower airflow.
E312 Restricted airflow in cooling or con-
tinuous fan mode is lower than CFM
setting.
E313 Indoor or outdoor unit capacity mis-
match. Communication only.
E331 Global network connection - Commu-
nications link problem.
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.
E348 No 24 Volt output on Y2 of "integrated
control" with non-communicating out-
door unit.
E349 No 24 Volts between R & O on
"integrated control" with non-commu-
nicating outdoor unit (dual fuel model
required for heat pump application).
E370 Interlock switch sensed open for 2
minutes.
507404-04
Check for dirty filter and airflow restriction. Check blower performance.
1-hour soft lockout. Cleared when heat call finishes successfully.
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.
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.
Indoor blower motor over temperature (motor tripped on internal protec-
tor). Check motor bearings and amps. Replace if necessary. Cleared
after blower demand is satisfied.
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.
Warning Only. Furnace blower in cutback mode due to restricted
airflow. Reduce firing rate every 60 seconds to match available CFM.
Check filter and duct system. To clear replace filter if needed or repair/
add duct. 2-stage controls will reduce firing rate to 1-stage. Clears
when heat call finished successfully.
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 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 con-
figuring 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 hard-
wire. Applicable in non-communicating mode. Critical Alert.
Control sees the loss of 24VAC for 2 minutes. Terminate all ser-
vices and wait for interlock switch to close. The alarm will clear
when 24VAC is continuously sensed on DS terminal for a mini-
mum of 10 seconds or on a power reset.
Issue 1621 Page 71 of 80