Advanced Cooling Controller
User Manual
A Parameter Description
Issue Draft A (2014-12-26)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Parameter
Description
Default Value
Suction HP for
speed fall
Sets the suction pressure for
forcibly decreasing the indoor
fan rotational speed.
1.75 Mpa
Suction LP for
shutdown
Sets the suction pressure for
shutting down the compressor.
0.25 Mpa
Suction LP for
shutdown
recovery
Sets the suction pressure for
automatically starting the
compressor after the
compressor is shut down.
0.45 Mpa
Anti-freeze press
for freq rise lim
Sets the suction pressure for
compressor
freq rise limit
to
avoid frost.
0.70 Mpa
Anti-freeze press
for freq fall
Sets the suction pressure limit
for preventing the freeze of
pipes. When the pressure is
lower than the value, the
compressor frequency begins
to decrease.
0.63 Mpa
Anti-freeze press
for shutdown
Sets the suction pressure limit
for preventing the freeze of
pipes. When the pressure is
lower than the value, the
compressor will be shut down.
0.55 Mpa
Anti-freeze
shutdown delay
Indicates the time delay for
shutting down the compressor
when the detected suction
pressure reaches the value for
shutting down the compressor.
600s
Phase cur for
freq rise limit
Sets the current for compressor
freq rise limit
.
28.00 A
Phase cur for
freq fall
Sets the phase current for
forcibly decreasing the
compressor frequency.
30.00 A
Phase cur for
shutdown
Sets the phase current for
shutting down the compressor.
32.00 A
Anti-cond freq
fall temp diff
When the supply air
temperature is lower than the
calculated dew-point
temperature at the return air
side, condensation may occur.
To avoid condensation, the
frequency of the compressor
should be forcibly decreased
when the temperature
difference between the supply
air and dew-point is smaller
–8.0°C