Fujitsu AS*A09LKC Service Instructions Manual page 21

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 18 : Anti-freezing Protection Operation / Release Temperature)
Temperature
4°C
4. COOLING PRESSURE OVERRISE PROTECTION
When the outdoor unit heat exchange sensor temperature rises to 67°C or greater,
the compressor is stopped and trouble display is performed.
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
55°C
The compressor frequency is
decreased 3Hz every 60seconds.
53°C
It returns to the normal operation
Temperature
7°C
Refer to below
Compressor Operation
[ AS*A09LKC ]
52Hz or greater 49Hz
43 49Hz Frequency down every 120 sec
34 40Hz 28Hz
22 28Hz OFF
[ AS*A12LKC ]
48Hz or greater 45Hz
39 Frequency down every 120 sec
45Hz
27 36Hz 18Hz
25Hz OFF
52°C
50°C
01-18