Lennox ComfortSense 8500 Installation And Setup Manual page 31

Condition Issue
All RTU
Critical compressors
Locked
RTU Fault State
Critical
Detected
Outdoor
Temperature
Minor
(RT17) Sensor
Problem
Discharge
(Supply) Air
Minor Temperature
Sensor (RT6)
problem.
Table 10. Error Codes
Display System Action
This error is displayed
All RTU
in notification screen
compressors
and technician system
Locked
status screen.
This error is displayed
RTU Fault
in notification screen
State
and technician system
Detected
status screen.
Outdoor Temp Displayed in
Sensor notification screen.
Discharge
Displayed in
Air Temp
notification screen.
Sensor
31
Action to Clear / Recovery
Condition
User will have to contact the
Service Contractor to have the
system serviced.
Will need to check RTU state
If the RTU recovered from the
error automatically the error will
also automatically clear.
User will have to contact the
Service Contractor to have the
system serviced.
Will need to check RTU state.
If the RTU recovered from the
error automatically the error will
also automatically clear.
If measurement of the outdoor
temperature sensor is out of
specified range (including open /
short detection, the alarm will be
activated. Alarm will automatically
clear once in range condition is
detected.
Check sensor and wiring.
If measurement of the discharge
air temperature sensor is out of
specified range (including open /
short detection, the alarm will be
activated. Alarm will automatically
clear once in range condition is
detected.