6
Table 2. Alert Codes and Troubleshooting
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat
Alert
Code
Inverter
Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Under dealer
control center >
Notifications
Component or System Operational State and Troubleshooting Tip
How to clear alert code
12
Service
Urgent
Indoor Unit Not
Detected
Thermostat did not find an indoor unit. Make sure there is an Lennox communicating indoor unit
on the system.
•
Check for voltage and missing component.
•
Check
R
,
i+
,
i-
and
C
connections at mag-mount or subbase, smart hub and all attached
communicating components.
• Ohm wires for electrical continuity.
•
Cycle power to both indoor unit first and then thermostat.
•
Verify that equipment interface module (if applicable) is configured as either an air handler or
furnace when used with a non-communicating indoor unit.
•
S30
: Go to
menu
>
settings
>
advanced settings
>
view dealer control center
>
equipment
and
press
reset all equipment
. This will allow the system to auto-detect any Lennox communicating
devices attached.
•
S40
: Go to
Menu
>
Settings
>
Advanced Settings
>
View Service Support Center
>
Equipment
Setting
>
Reset
and select
Reset Hvac Equipment
. This will allow the system to
auto-detect any Lennox communicating devices attached.
• Replace indoor unit control if there is no response.
Automatically clears when the system
detects that the issue no longer exists.
13
Service
Urgent
Duplicate
Comfort Sensor
ID
Thermostat found more than one outdoor unit, or more than one indoor unit, or more than one
thermostat connected to the system. Thermostat will display the message “Too Many Devices of
the Same Type”.
•
Check wiring and remove duplicate equipment.
•
S30
: Go to
menu
>
settings
>
advanced settings
>
view dealer control center
>
equipment
and
press
reset all equipment
. This will allow the system to auto-detect any Lennox communicating
devices attached.
•
S40
: Go to
Menu
>
Settings
>
Advanced Settings
>
View Service Support Center
>
Equipment
Setting
>
Reset
and select
Reset Hvac Equipment
. This will allow the system to
auto-detect any Lennox communicating devices attached.
Automatically clears when the system
detects that the issue no longer exists.
14
Service
Urgent
Too Many
Devices of the
Same Type
The thermostat found more than one thermostat, indoor or outdoor unit on the system.
•
Check wiring and remove duplicate equipment.
•
S30
: Go to
menu
>
settings
>
advanced settings
>
view dealer control center
>
equipment
and
press
reset all equipment
. This will allow the system to auto-detect any Lennox communicating
devices attached.
•
S40
: Go to
Menu
>
Settings
>
Advanced Settings
>
View Service Support Center
>
Equipment
Setting
>
Reset
and select
Reset Hvac Equipment
. This will allow the system to
auto-detect any Lennox communicating devices attached.
Automatically clears when the system
detects that the issue no longer exists.
15
Information
Dealer Only
Parameter
Mismatch
Detected
Incorrect parameter settings detected. Dealer would need to re-set the system and start configura
-
tion again.
Automatically clears once proper system
configuration is completed.
20
Service
Urgent
Protocol
Upgrade
Required
The thermostat cannot work with one of the system devices because the thermostat firmware
needs to be updated first.
Update thermostat firmware.
21
Service
Urgent
Incompatible
Equipment
Detected
Equipment is trying to be utilized that is not compatible with other system components, such as a
single-stage non-variable speed motor furnace with a modulating outdoor unit.
Use compatible equipment.
