Fujitsu AIRSTAGE J-II Design & Technical Manual page 711

FORCED THERMOSTAT OFF FUNCTION
„ „
● "Edge" input only
Connector
Ch3 of
CNA03 or CNA04
Example of cooling mode
Ch3 input of On
CNA03 or
Off
CNA04
On
Thermostat
Off
Room temp.
Set temp.
NOTE :
● Indoor unit may not do thermostat off promptly even if receive signal by operating
conditions of other indoor unit of same refrigerant system.
Example 1
z „
Forced thermostat off is one of the function to save energy. For example, case of outdoor
temperature is lower than Indoor temperature, Indoor unit of air conditioner worked as Fan
operation based upon receiving signal from external controller. (Cooling Only)
Cooling operation
(Thermostat on)
Indoor
Temperature
Input signal Command
OFF → ON Thermostat off
ON → OFF Normal
External controller
Thermistor
Damper
Thermistor
Outdoor
Temperature
28˚ C 31˚ C
- (08 - 15) -
Fan operation
(Thermostat off)
Indoor
Temperature
28˚ C
Thermistor
Thermistor
Outdoor
Temperature
24˚ C