Fujitsu ASU12RL2, AOU12RL2 manual Various Protections, Current Release Control, Heating, Cooling

20. VARIOUS PROTECTIONS

1.DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL

The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature.

When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 20rps, and it continues to decrease the frequency for 20rps every 120 seconds until the temperature becomes lower than Temperature .

When the discharge temperature becomes lower than Temperature, the protection control of the compressor frequency will be released.

When the discharge temperature becomes higher than Temperature , the compressor is stopped and the indoor unit body Operation lamp and Timer lamp starts blinking.

(Table 20 : Discharge temperature over rise prevension control / Release temperature)

Temperature	Temperature	Temperature
104°C	101°C	110°C
(219.2°F)	(213.8°F)	(230°F)

2.CURRENT RELEASE CONTROL

The compressor frequency is controlled so that the outdoor unit input current does not exceed the current limit value that was set up with the outdoor temperature.

The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value.

( Table 21 : Current release operation value / Release value )

[ Heating ]

AOU09RL2

OT (Control / Release)

10.5A / 10.0A

17°C (62.6°F)

12.0A / 11.5A

12°C (53.6°F)

12.5A / 12.0A

5°C (41°F)

12.5A / 12.0A

OT : Outdoor Temperature

[ Heating ]

AOU12RL2

OT (Control / Release)

11.0A / 10.5A

17°C (62.6°F)

12.0A / 11.5A

12°C (53.6°F)

14.0A / 13.5A

5°C (41°F)

14.5A / 13.5A

OT : Outdoor Temperature

[ Cooling ]

AOU09RL2

OT (Control / Release)

8.0A / 7.5A

46°C (114.8°F)

9.0A / 8.5A

40°C (104°F)

12.0A / 11.5A

OT : Outdoor Temperature

[ Cooling ]

AOU12RL2

OT (Control / Release)

9.0A / 8.5A

46°C (114.8°F)

10.0A / 9.5A

40°C (104°F)

12.0A / 11.5A

OT : Outdoor Temperature

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