Forced Cooling Operation; Compressor Stop Control - Fujitsu AUG12LVLB Service Instruction

4. COOLING PRESSURE OVER RISE PROTECTION
On cooling mode, the compressor frequency is controlled as following based on the
detection value of the outdoor heat exchanger temperature sensor.
(Fig.17 : Cooling Pressure Over Rise Protection Control)
Outdoor heat exchange
temperature
67°C
62°C
59°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.
(Fig.18 : Heating Overload Protection Control)
Indoor heat exchange
temperature
63°C
55°C
53°C
50°C

1-25. FORCED COOLING OPERATION

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.

1-26. COMPRESSOR STOP CONTROL

When the detection value of outdoor temperature sensor is lower than temperature
in the table below, the compressor is stopped.
(Table 17 : Operation temperature of compressor stop control)
Operation
temperature
AMP Air Conditioning
Compressor is OFF
The compressor frequency is
decreased 2rps every 60seconds.
Hold
Release of protection
Compressor is OFF
The compressor frequency is
decreased 25rps every 120 seconds.
The compressor frequency is
decreased 2rps every 60 seconds.
Release Stable range
Release
Temperature
Cooling Heating
- 20°C
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