Lennox Allied Air Enterprise A97DSMV Installation Instructions Manual page 60

Code Diagnostic Codes / Status of Equipment
E180 Outdoor air temperature sensor failure. Only shown
if shorted or out of range (Communicating systems
only)
E200 Hard Lock out - Rollout circuit open or previously
open
E201 Indoor blower/communication failure - Unable to
communicate with blower motor
E202 Indoor blower motor mismatch - indoor motor
horsepower does not match unit capacity
E203 Appliance capacity size is NOT programmed.
Invalid unit codes. Refer to configuration flow chart.
E204 Gas valve mis-wired
E205 Gas valve control relay contact shorted
E207 Hot surface igniter sensed open - Refer to
troubleshooting
E223 Low pressure switch failed open
E224 Low pressure switch failed closed -Refer to
troubleshooting
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Action Required to Clear and Recover
Compare outdoor sensor resistance to temperature
resistance charts in unit installation instructions.
Replace sensor pack if necessary. At beginning of (any)
configuration, furnace or air handler control will sense
outdoor air and discharge air temperature sensor(s)
If detected (reading in range), appropriate feature will
be set as installed and that could be seen in 'About '
screen. In normal operation after control recognizes
sensors, alarm will be sent if valid temperature
reading is lost. To get rid of setting and alarm, redo
configuration and make sure that temperature sensor
is marked as not installed in indoor Unit 'About' screen.
When indoor unit control is replaced thermostat will 'tell'
new control if temperature sensor is in system or not.
Clears 30 seconds after fault recovered.
Correct cause of rollout trip or replace flame rollout
switch. Test furnace operation. Cleared after fault
recovered.
Indoor blower communication failure including power
outage. Lost communication with indoor blower motor.
Possible causes: motor not powered, loose wiring.
Problem may be on control or motor side. Cleared after
fault recovered.
Incorrect appliance capacity code selected. Check for
proper configuring under Unit Size Code for Furnace/
Air Handler on configuration guide or in installation
instructions. Cleared after the correct match is detected
following a reset. (Remove thermostat from system
while applying power and reprogramming)
No appliance capacity code selected. Check for proper
configuring under Unit Size Codes for Furnace on
configuration guide or in installation instruction. Critical
Alert Cleared after valid unit code is read following a
reset (remove thermostat from system while applying
power and reprogramming)
Check gas valve operation and wiring. Clears when
repaired
Check wiring on control and gas valve. If wiring is
correct replace control.
Measure resistance of hot surface igniter. Replace if
open or not within specified range found in installation/
operation manual. Resumes normal operation after fault
is cleared.
Check pressure(inches W.C) of low pressure switch
closing on heat call. Measure operating pressure
(inches w.c.). Inspect vent and combustion air inducer
for correct operation and restriction. Resumes normal
operation after fault is cleared.
Check pressure(inches W.C) of low pressure switch
closing on heat call. Measure operating pressure
(inches w.c.). Inspect vent and combustion air inducer
for correct operation and restriction. Resumes normal
operation after fault is cleared.
Issue 2241 507029-05