Lennox S40 Installation And Setup Guide

91
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
-- Service Soon --
Possible loose or mis-wired connections or two zone sensors are assigned the same zone number. Two
dashes will be displayed on the S40 thermostat for indoor temperature and/or zone sensor. The system will
go into central mode. Individual zone functions is disabled. Anytime the zone sensor loses communication
with the damper control module, the entire system will go into central mode. If two sensors are assigned the
same zone number, this could result in the double dashes to appear as well.
• If two zone sensors
are assigned
the same zone
number, this could
cause the double
dashes to appear.
• If loose or mis-wired
connection was
conrmed, correct
the issue and run
the re-conguration
procedure.

Lennox S40 Specifications

General

Display	Color touchscreen
Voice Control	Amazon Alexa, Google Assistant
Energy Reports	Yes
Programming	7-day programmable
Warranty	5-year limited warranty
Connectivity	Wi-Fi
Compatibility	Lennox HVAC systems
Smart Features	Geofencing
Sensors	Temperature, Humidity