Fujitsu AG * V09LAC Series Service Instruction page 34

(3). ANTIFREEZING CONTROL (Cooling and Dry mode)
The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger
temperature sensor detects the temperature lower than Temperature .
Then, the anti-freezing control is released when it becomes higher than Temperature .
(Table 19 : Anti-freezing Protection Operation / Release Temperature)
Temperature
A - D
E, F
(4). COOLING PRESSURE OVERRISE PROTECTION
When the outdoor unit heat exchange sensor temperature rises to temperature
compressor is stopped and trouble display is performed.
(Table 20 : Cooling Pressure Over Rise Protection Function Temperature)
AG*V09/ 12/ 14LAC
(5). HIGH TEMPERATURE RELEASE CONTROL ( HEATING MODE )
On heating mode, the compressor frequency is controlled as following based on the
detection value of the indoor heat exchanger temperature sensor.
[ Control System ]
Indoor heat exchange
temperature
Temperature
The compressor frequency is
precisely controlled so that
it does not exceeds Temperature .
Temperature
It returns to the normal operation
AG*V09/ 12/ 14LAC
Compressor Operation
[ AG*V09/ 12LAC ]
46Hz or greater 45Hz
Frequency down every 120 sec
39 45Hz
26 38Hz 25Hz
18 25Hz OFF
Temperature
4°C 7°C
4°C 13°C
Temperature
67°C
Refer to below
Temp Temp Temp
Temp
55°C 53°C
Temperature
Temperature
52°C 50°C
[ AG*V14LAC ]
39Hz or greater 38Hz
Frequency down every 120 sec
30 38Hz
19 29Hz 18Hz
18Hz OFF
05-20
or greater, the