Current Release Control; Cooling Pressure Over-Rise Protection; Low Outdoor Temperature Protection - Fujitsu ASUH09LPAS Service Manual

8-3. Current release control

The rotation number of compressor is controlled so that the outdoor unit input current does not ex-
ceeds current limit value set according to the outdoor temperature.
The rotation number of compressor returns according to the operation mode, when the current be-
comes lower than the release value.
¢ AOUH09LPAS1
Operation mode
Cooling
Heating
¢ AOUH12LPAS1
Operation mode
Cooling
Heating

8-4. Cooling pressure over-rise protection

When the outdoor unit heat exchanger temperature reaches trigger condition below, the compressor
is stopped and trouble display is performed.
Trigger condition

8-5. Low outdoor temperature protection

When the outdoor temperature sensor detects lower than the trigger condition below, the compres-
sor is stopped.
Operation mode
Trigger condition
Release condition
8-3. Current release control
Outdoor temp. (Ta)
122.0°F (50°C) ≤ Ta
114.8°F (46°C) ≤ Ta < 122.0°F (50°C)
104.0°F (40°C) ≤ Ta < 114.8°F (46°C)
53.6°F (12°C) ≤ Ta < 104.0°F (40°C)
35.6°F (2°C) ≤ Ta < 53.6°F (12°C)
Ta < 35.6°F (2°C)
62.6°F (17°C) ≤ Ta
53.6°F (12°C) ≤ Ta < 62.6°F (17°C)
41.0°F (5°C) ≤ Ta < 53.6°F (12°C)
Ta < 41.0°F (5°C)
Outdoor temp. (Ta)
122.0°F (50°C) ≤ Ta
114.8°F (46°C) ≤ Ta < 122.0°F (50°C)
104.0°F (40°C) ≤ Ta < 114.8°F (46°C)
53.6°F (12°C) ≤ Ta < 104.0°F (40°C)
35.6°F (2°C) ≤ Ta < 53.6°F (12°C)
Ta < 35.6°F (2°C)
62.6°F (17°C) ≤ Ta
53.6°F (12°C) ≤ Ta < 62.6°F (17°C)
41.0°F (5°C) ≤ Ta < 53.6°F (12°C)
Ta < 41.0°F (5°C)
- (04-32) -
Trigger condition Release condition
3.5 A
3.5 A
4.0 A
5.5 A
5.5 A
5.5 A
5.5 A
6.0 A
7.0 A
7.0 A
Trigger condition Release condition
3.5 A
3.5 A
4.0 A
6.0 A
6.0 A
6.0 A
5.5 A
6.0 A
7.0 A
7.0 A
149.0°F (65°C)
Cooling/Dry
5°F (-15°C)
14°F (-10°C)
3.0 A
3.0 A
3.5 A
5.0 A
5.0 A
5.0 A
5.0 A
5.5 A
6.5 A
6.5 A
3.0 A
3.0 A
3.5 A
5.5 A
5.5 A
5.5 A
5.0 A
5.5 A
6.5 A
6.5 A
8. Various protections