Fujitsu B24LDC, Service Instruction

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(4). COOLING PRESSURE OVERRISE PROTECTION
(Table 20 : Cooling Pressure Over Rise Protection Function Temperature)
When the outdoor unit heat exchange sensor temperature rises to temperature or greater, the
compressor is stopped and trouble display is performed.
AS*B24LDC
67 C
Temperature
Indoor heat exchange
temperature
Over than 15Hz
Less than 15Hz OFF
AS*B24LDC
53 C
(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.
(The control system is different depending on the product model)
(Fig 11 : Heating Overload Protection Control)
[ Control System ]
Temperature
AS*B24LDC
Temperature
Refer to below
Temp Temp
Compressor Operation
Frequency down every 60 seconds
05-19
50 C
The forced cooling operation starts up when MANUAL / AUTO button is pressed more than
10 seconds.
During the forced cooling operation, it keeps operation regardless of detection value of room
temperature sensor.
Operation LED and Timer LED light up while the unit is on the forced cooling operation.
The forced cooling operation is released after 60 minutes from starting time.
When the detection value of outdoor temperature sensor is lower than Temp in the table below,
the compressor is stopped.
(Table 23 : Operation temperature of compressor stop control)
Cooling
Heating
AS*B24LDC -15 C
___
21. FORCED COOLING OPERATION
22. COMPRESSOR STOP CONTROL