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SERVICING
SET THERMOSTAT TO CHECK SYSTEM STATUS
1. Follow the sequence 1. to 5. of SET THERMOSTAT TO
ADJUST INDOOR AIR CFM TRIM.
2. Select STATUS.
3. Follow screen for System Status.
TS Time Stamp (Compressor run time)
MD
Current system operational Mode
(cooli ng, cooling startup, heating, heating startup, oil
return, defrost, stop)
CRM Compressor Reduction Mode
RAD
Requested and Actual percentage Demand
(Requested Demand, Actual cooling/heating provided)
RAF
Requested and Reported ID airflow
(Reques ted CFM, Actua l CFM)
ATOF Outdoor Air Temperature and Outdoor Fan STATUS
DCT Di scharge Tempera ture, Outdoor Coi l Temperature
DLT
Defrost sensor temperature, Outdoor Liquid
Temperature
PSDST Pressure Sensor and Outdoor Suction Temperature
HEAT PUMP WITH OUTDOOR TEMPERATURE LOCKOUTS
It is recommended to set the outdoor temperature lockouts during
the initial thermostat set up. This will enable the compressor to
be turned off and switch heating source from refrigeration to aux-
iliary/secondary heating under low ambient conditions.
Backup heat lockout temperature will enable auxiliary/second-
ary heating to be turned on when outdoor temperature is much
higher than indoor temperature, compressor might stop operat-
ing under this circumstance.
Backup Heat Lockout
Temperature
Compressor Lockout
Temperature
(-) (F°)
OFF 15
In order to access the compressor lockout temperature, Press
MENU and scroll down to press INSTALLER OPTIONS. Enter the
date code (password) when prompted. Choose VIEW / EDIT CUR-
RENT SETUP and COMPRESSOR LOCKOUT / BALANCE POINT will be
under HEAT / COOL CONTROL OPTIONS. For more information
please refer to COMFORTNET™ CTK04 Communicating Thermostat
SYSTEM INSTALLATION GUIDE.
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