Compressor Stop Control; Fresh Air Control - Fujitsu ARG60LHTA Service Instruction

6. HEATING OVERLOAD PROTECTION
On heating mode, the compressor frequency is controlled as following based on the
detection value of the pressure sensor.
(Fig.13 : Heating Overload Protection Control)
Condensing pressure
(Indoor heat ex. temp.)
4.1MPa
(65°C)
3.3MPa
(55°C)
3.0MPa
(50°C)
2.8MPa
(48°C)

1-20. COMPRESSOR STOP CONTROL

When the detection value of outdoor temperature sensor is lower than temperature
in the table below, the compressor is stopped.
(Table 18 : Operation temperature of compressor stop control)
Operation
temperature

1-21. FRESH AIR CONTROL

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation
as shown in Fig.14.
(Fig.14 : Fresh Air control)
Fan motor
(Indoor unit)
Control signal
(for Fresh Air)
AMP Air Conditioning
Compressor is OFF
The compressor frequency is
decreased 7rps every 60 seconds.
The compressor frequency is
decreased 1rps every 60 seconds.
Release Stable range
Release
Temperature
Cooling Heating
- 20°C
ON
OFF
ON
OFF
12V
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01-20