Error Codes And Reminders - Lennox ComfortSense 8500 Installation And Setup Manual

Error Codes and Reminders

Condition Issue
Built-In Temp
Sensor error
- temperature
Critical sensor reads
-4°F or less or
158°F (+ 5°F) or
greater.
Remote
temperature
sensor error.
External sensor
Critical
reads -4°F or
less or 158°F
(+ 5°F) or
greater.
Table 10. Error Codes
Display System Action
Indoor temp is
displayed as "--" on the
Temperature
home screen.
Sensor
This error is displayed
Error
on the notification
screen as well.
Indoor temp is
displayed as "--" on the
home screen.
This error is displayed
on the notification
External screen as well.
Sensor
When configured for
Error
external temperature
sensors and there
is an error, the unit
will automatically
switch to the internal
temperature sensor.
28
Action to Clear / Recovery
Condition
If the sensor starts detecting a
normal operating range, the error
message will automatically clear
and the system will return to
normal operation.
Contact service contractor to
replace the CS8500.
If the sensor starts detecting a
normal operating range, the error
message will automatically clear
and the system will return to
normal operation.
Contact service contractor to
replace the external temperature
sensor.
Other than replacing the CS8500,
go to the technician setting >
temperature sensor configuration
and change the temperature
sensor source back to internal
temperature sensor. That will
remove the error message
from the home and notification
screens.