8. Various protections
8-1. Discharge gas temperature over-rise prevention control
The discharge gas temperature sensor (discharge thermistor: outdoor unit side) detects the dis-
charge gas temperature.
• When the discharge temperature becomes higher than the trigger condition, the compressor fre-
quency is decreased as the table below, and it continues to decrease until the discharge tempera-
ture becomes lower than the trigger condition.
• When the discharge temperature becomes lower than the release condition, control of compressor
frequency is released.
• When the discharge temperature becomes higher than the compressor protection temperature,
the compressor is stopped and the indoor unit indicator lamp starts blinking.
Trigger condition
219.2°F (104°C)
Compressor frequency
-20 rps/120 seconds
Release condition
213.8°F (101°C)
Compressor protection temperature
230.0°F (110°C)
8-2. Anti-freezing control (cooling and dry mode)
The rotation number of compressor is decrease in cooling and dry mode when the indoor unit heat
exchanger temperature sensor detects the temperature lower than the trigger condition.
When the indoor unit heat exchanger temperature reaches release condition, the anti-freezing con-
trol is stopped.
Trigger condition
39.2°F (4°C)
Release condition
Outdoor temp. ≥ 50°F (10°C)*
1
Outdoor temp. ≥ 53.6°F (12°C)*
2
44.6°F (7°C)
Outdoor temp. < 50°F (10°C)*
1
Outdoor temp. < 53.6°F (12°C)*
2
55.4°F (13°C)
*1: During the outdoor temperature dropping
*2: During the outdoor temperature rising
8-1. Discharge gas temperature over-rise prevention control
- (04-31) -
8. Various protections
CONTROL AND
FUNCTIONS
CONTROL AND
FUNCTIONS
Содержание AOUH09LPAS1
Страница 4: ......
Страница 5: ...1 GENERAL INFORMATION 2022 10 18 SR_CH01_AS050EF_02 ...
Страница 14: ...2 2 Outdoor unit 01 8 2 Dimensions GENERAL INFORMATION GENERAL INFORMATION ...
Страница 15: ...2 TECHNICAL DATA AND PARTS LIST 2021 04 15 SR_CH02_AS050EF_02 ...
Страница 39: ...3 TROUBLESHOOTING 2021 07 XX SR_CH03_AS050EF_01 ...
Страница 41: ...5 2 Outdoor unit 03 43 CONTENTS continued ...
Страница 42: ......
Страница 87: ...4 CONTROL AND FUNCTIONS 2021 07 XX SR_CH04_AS050EF_01 ...
Страница 123: ...5 FILED WORKING 2021 06 28 SR_CH05_AS050EF_03 ...