Page 55
Integrated Control Diagnostic Codes (continued)
Code
Diagnostic Codes/Status of Equipment
Action Required to Clear and Recover
E124
Active communicating thermostat signal
missing for more than 3 minutes.
Equipment lost communication with the thermostat. Check
four wiring connections, ohm wires and cycle power at the
thermostat. Alert stops all services and waits for heartbeat
message from thermostat (subnet controller). Cleared after
valid thermostat (subnet controller) message is received.
E125
Control failed self-check, internal error,
failed hardware. Will restart if error recov-
ers. Integrated control not communicating.
Covers hardware errors (flame sense cir
-
cuit faults, pin shorts, etc.).
Hardware problem on the control. Cycle power on control.
Replace if problem prevents service and is persistent. Criti-
cal alert. Cleared 300 seconds after fault recovered.
E126
Control internal communication problem.
Hardware problem on the control. Cycle power on con-
trol. Replace if problem prevents service and is persistent.
Cleared 300 seconds after fault recovered.
E131
Corrupted control parameters (Verify con-
figuration of system). Communicating only.
Reconfigure the system. Replace control if heating or cool
-
ing is not available. Only applicable in the communicating
mode, not in startup. Exit from Commissioning and Execute
‘Set Factory Default mode Control will still operate on default
parameter settings
E180
Outdoor air temperature sensor failure.
Only shown if shorted or out-ofrange.
Compare outdoor sensor resistance to temperature/ resis-
tance 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 configu
-
ration 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 tem-
perature sensor is in system or not. Clears 30 seconds after
fault recovered.
E200
Hard lockout - Rollout circuit open or pre-
viously open.
Correct cause of rollout trip, or replace flame rollout switch.
Test furnace operation. Cleared after fault recovered.
E201
Indoor blower communication failure - Un-
able to communicate with blower motor.
Indoor blower communication failure (including power out-
age). 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.
E202
Indoor blower motor mis-match - Indoor
motor horsepower does not match unit ca-
pacity.
Incorrect appliance capacity code selected. Check for proper
configuring under: Unit Size Codes for Furnace/Air Handler
on configuration guide or in installation instructions. Cleared
after the correct match is detected following a reset. (Re-
move thermostat from system while applying power and re-
programming.)
E203
Appliance capacity / size is NOT pro-
grammed. Invalid unit codes refer to con-
figuration flow chart.
No appliance capacity code selected. Check for proper con-
figuring under: Unit Size Codes for Furnace on configuration
guide or in installation instructions. Critical Alert. Cleared af-
ter valid unit code is read following a reset. (Remove thermo-
stat from system while applying power and reprogramming.)
E204
Gas valve mis-wired.
Check gas valve operation and wiring. Clears when repaired.
E205
Gas valve control relay contact shorted.
Check wiring on control and gas valve. If wiring is correct,
replace control.
Summary of Contents for DAVE LENNOX SIGNATURE SL297UHNV
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