3. ANTI-FREEZING CONTROL (Cooling and Dry mode)
The compressor frequency is decrease on cooling and 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 26 : Anti-freezing protection operation / Release temperature )
4. COOLING PRESSURE OVERRISE PROTECTION
When the outdoor unit heat exchange sensor temperature rises to 152.6°F (67°C) or greater,
the compressor and the outdoor fan motor are stopped and trouble display is performed.
5. HIGH TEMPERATURE RELEASE CONTROL ( Heating mode )
On heating mode, the compressor frequency is controlled as following based on the
detection value of the indoor heat exchanger temperature sensor.
Indoor heat exchange
temperature
[ Control System ]
It returns to the normal operation
145.4°F
(63°C)
Outdoor temperature
Over than 50°F(10°C) *1
or 53.6°F(12°C) *2
Less than 50°F(10°C) *1
or 53.6°F(12°C) *2
*1. When the temperature rises.
*2. When the temperature drops.
39.2°F (4°C)
44.6°F (7°C)
55.4°F (13°C)
Temperature Temperature
compressor stop
131°F
(55°C)
127.4°F
(53°C)
The compressor frequency is
decreased 15rps every 120 seconds.
The compressor frequency is
decreased 2rps every 120 seconds.
The compressor frequency is
Maintenance of status quo.
122°F
(50°C)
01-19
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