Fujitsu AB*14LBAJ Service Instruction page 32

4. COOLING PRESSURE OVER RISE PROTECTION
When the outdoor unit heat exchange sensor temperature rises to
the compressor is stopped and error display is indicated.
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 and outdoor heat exchanger temperature sensor.
(Fig 14 : Heating Overload Protection Control)
*1
Te : 54°C
*2
Te : 50°C
*1
Th> -9°C ---> Te : 54°C
-9°C>Th>-11°C ---> Te : 54°C
-11°C>Th>-13°C ---> Te : 52°C
-13°C>Th>-15°C ---> Te : 50°C
-15°C>Th
*2
Th> -9°C ---> Te : 50°C
-9°C>Th>-11°C ---> Te : 50°C
-11°C>Th>-13°C ---> Te : 48°C
-13°C>Th>-15°C ---> Te : 46°C
-15°C>Th
Compressor is OFF
Te : 63°C
The compressor frequency is
decreased 10Hz every 120 seconds.
48°C
Hold
44°C
Compressor ON:
The compressor frequency is
increased 5Hz every 120 seconds.
Compressor OFF:
Release of protection
=
=
=
=
---> Te : 48°C
=
=
=
=
---> Te : 44°C
70.5°C
Th : Outdoor heat exchange temperature
Te : Indoor heat exchange temperature
01-29
or greater,