Lennox S40 Installation And Setup Guide

90
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
71520
Service
Urgent
OU: Blocked Liquid
Line
• If superheat suction pressure values are not within expected range.
• Check liquid line, expansion and service valves.
Automatically clears
when the system
detects that the issue
no longer exists.
71521
Service
Urgent
HP: Outdoor TXV
Failure
• Superheat average is not in expected range.
• Replace Outdoor Expansion Valve.
Automatically clears
when the system
detects that the issue
no longer exists.
80001
Information
only Dealer
IAQ: Persistent Poor
Air Quality
Cycle power to device.
If cycling power does not resolve the issue, check all installed Indoor Air Quality (IAQ) equipment installed in
the HVAC system. For example check:
• All installed IAQ equipment are power on, connected and working properly.
• HC air lters and replace if dirty.
• Pure Air or Pure Air S UV lamp and if not working replace. Check lter and replace if dirty.
• ERV/HRV lter and replace if dirty.
• UV Germicidal lamp is working and replace if necessary.
• If cycling power
and checking
all installed IAQ
equipment does
not resolve the
issue, then replace
device.
• Automatically
clears when the
system detects
that the issue no
longer exists.
80002
Information
only Lennox
XX: Unresponsive
Wireless Device Fault
Wireless BLE device is connected to the network but has failed to respond to commands. Try cycling power
to device.
If cycling power does not resolve issue then:
• Remove device from the BLE network.
• Perform a factory reset of the device.
• Attempt to add device back to BLE network.
• If recycling power
or factory reset
does not resolve
issue then replace
device.
• Automatically
clears when the
system detects
that the issue no
longer exists.
80003 Service Soon
Lost communication
with wireless Device
Try cycling power to the device.
If cycling power does not resolve issue then:
• Remove device from the BLE network.
• Perform a factory reset of the device.
• Attempt to add device back to BLE network.
• If recycling power
or factory reset
does not resolve
issue then replace
device.
• Automatically
clears when the
system detects
that the issue no
longer exists.
80005 Service Soon
XX: Unknown Wireless
Device Found.
• Upon power cycle condition may clear itself.
• Move the wireless BLE device closer to the thermostat or add a Lennox Wireless Extender to increase the
wireless coverage area.
Automatically clears
when the system
detects that the issue
no longer exists.

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