Fujitsu Airstage J-II - Page 711

FORCED THERMOSTAT OFF FUNCTION

"Edge" input only
●
Connector Input signal Command
Ch3 of
CNA03 or CNA04
OFF → ON Thermostat off
ON → OFF Normal
Example of cooling mode
Ch3 input of
CNA03 or
CNA04
Thermostat
Room temp.
Set temp.
On
On
Off
Off
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)
31˚C28˚C
24˚C28˚C
Cooling operation
(Thermostat on)
Fan operation
(Thermostat off)
External controller
Thermistor
Thermistor
Thermistor
Thermistor
Damper
Indoor
Temperature
Indoor
Temperature
Outdoor
Temperature
Outdoor
Temperature
- (08 - 15) -
EXTERNAL INPUT & OUTPUT EXTERNAL INPUT & OUTPUT