Lennox S40 - Page 86

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Table 21. Lennox S40 Smart Thermostat Alert Codes and Troubleshooting
E2A=Errors to Action, GF= Gas Furnace, AH=Air Handler, IU=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OU=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system,
SRS=Smart Room Sensor, TS=Thermostat , IAQ- IAQ Monitor and WE=Wi-Fi Extender
Alert
Code
Inverter
Flash
Code
Priority
Condition
Actual Displayed Alert
Text Under dealer control
center > Notications
Component or System Operational State and Troubleshooting Tip
How to clear
alert code
65542
Information
Only-Dealer
Update Failed
• Has verication failed. Update failed.
• Solid blue LED will appear on mag-mount if powered. Only on versions with mag-mount.
• Blinking blue LED will appear if not communicating with thermostat. Only on versions with mag-mount.
• Typically the thermostat will send a command to the unknown device and place it in a soft disable state.
The Lennox communicating control with the soft disable state will indicate so as follows:
• On air handler, furnace and outdoor controls, the state is displayed by double horizontal lines on seven-
segment display.
• On the damper control module, the green LED will blink three seconds on and one second off.
• On the equipment interface module, the green LED will blink three seconds on and one second off.
Cycling power to the soft disabled control may clear the condition. If cycling power does not clear the soft
disable state then replace control.
Not applicable.
Automatically clears
once is detected for
two seconds.
65543
Information
Only-Dealer
Firmware Updated
• When new rmware has been successfully updated to the thermostat.
• Typically the thermostat will send a command to the unknown device and place it in a soft disable state.
The Lennox communicating control with the soft disable state will indicate so as follows:
• On air handler, furnace and outdoor controls, the state is displayed by double horizontal lines on seven-
segment display.
• On the damper control module, the green LED will ash 3 seconds on and 1 second off.
• On the equipment interface module, the green LED will ash 3 seconds on and 1 second off.
Cycling power to the soft disabled control may clear the condition. If cycling power does not clear the soft
disable state then replace control.
Clears automatically
after successfully
update.
65544
Information
Only-Dealer
More Than 8 Tstats In
A Group
The system is limited to no more than eight (8) thermostats assigned to one group. You can have up to nine
groups (1-9) with ve thermostats assigned to each. If you have more than 8 thermostats assigned to a single
group, then alert code 65544 will be displayed.
If you DO NOT exceed the ve thermostats per group limitation, you will NOT get an alert code 65544.
EXAMPLE: If you had two groups with six thermostats assigned to each group, then you would get each
minute twelve alert code 65544 notications.
Once the system
detects that only ve
or less thermostats are
detected in one group
will the alert code
automatically clears.
65545 Service Soon Cooling Capacity Alert
Cooling operation may not be sufcient for the hottest days. Based on local conditions and climatological data
for zip code.
EXAMPLE: Dirty Filter, Low Refrigerant charge, TXV, etc. Symptom during mild temperatures may in-
clude; system running longer than normal but not showing any other symptoms.
Auto cleared on next
prediction