Fujitsu AUG12LVLB - 1-24. VARIOUS PROTECTIONS; 1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL; 2. CURRENT RELEASE CONTROL; 3. ANTIFREEZING CONTROL (Cooling and Dry mode)

1-24. VARIOUS PROTECTIONS
1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL
The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas
temperature.
When the discharge temperature becomes higher than 104°C, the compressor frequency
is decreased 20rps, and it continues to decrease the frequency for 20rps every 120 seconds until
the temperature becomes lower than 101°C.
When the discharge temperature becomes lower than 101°C, the control of the compressor
frequency is released.
When the discharge temperature becomes higher than 110°C, the compressor stops
2. CURRENT RELEASE CONTROL
01-25
The compressor frequency is controlled so that the outdoor unit input current does not exceeds
the current limit velue 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 15 : Current Release Operation Value / Release Value)
[ Heating ]
[ Cooling ]
OT : Outdoor Temperature
OT (Control / Release)
7.0A / 6.5A
9.0A / 8.5A
10.5A / 10.0A
12.0A / 11.5A
17°C
12°C
OT : Outdoor Temperature
5°C
AO*G14LALL
AO*G18LALL
AO*G14LALL
AO*G18LALL
OT (Control / Release)
6.5A / 6.0A
8.0A / 7.5A
8.5A / 8.0A
9.5A / 9.0A
17°C
12°C
OT : Outdoor Temperature
5°C
AO*G12LALL
AO*G12LALL
OT (Control / Release)
4.5A / 4.0A
6.0A / 5.5A
8.5A / 8.0A
46°C
40°C
OT : Outdoor Temperature
OT (Control / Release)
4.5A / 4.0A
6.0A / 5.5A
7.0A / 6.5A
46°C
40°C
3. ANTIFREEZING CONTROL (Cooling and Dry mode)
The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger
temperature sensor detects the temperature lower than Temperature .
Then, the anti-freezing control is released when it becomes higher than Temperature .
(Table 16 : Anti-freezing Protection Operation / Release Temperature)
Outdoor temperature
Over than 10°C *1
or 12°C *2
Less than 10°C *1
or 12°C *2
*1. When the temperature rises.
*2. When the temperature drops.
4°C
7°C
13°C
Temperature Temperature
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