Functions and control
5.2.10 Anti-freezing protection of the indoor heat exchanger
When refrigerating/heating, prevent freezing.
Tpg_indoor is the minimum value of the effective indoor unit (start it and it is in accord with the running
state).
When Tpg_indoorLJ ice_temp_1ć, the frequency of the compressor decreases at the speed of
1HZ/1second.
When Tpg_indoorLJ ice_temp_2ć, the frequency of the compressor decreases at the speed of
1HZ/10seconds.
When Tpg_indoor begins to rise again, and ice_temp_2≤Tpg_indoor≤ ice_temp_3ć, the frequency of
thecompressor doesn’t change.
When ice_temp_3LJTpg_indoorLJice_temp_3+3ć, the frequency of the compressor increases at the
speed of 1HZ/10seconds.
For example, Tpg_indoor≤0ćˈlast for 2 minutes, and then the outdoor unit will stop, and report underload
malfunction, but don’t send malfunction report to the indoor.
The compr
essor stops for m
ore than 3 minutes, Tpg_indoor> ice_temp_3+2ć, the compressor recovers.
5.2.11 The frequency limitation of modification rate
In the field which is controlled by high frequency, if the modification rate is not high enough, the
control-driven chip will enter into weak magnetic control, this will help to relieve the problem of modification
rate. If during the course of weak magnetic control, the modification rate is still not high enough, enter into
the control of decreasing frequency until the alarm of modification rate is relieved.
5.2.12 Temperature protection of the outdoor refrigerating coil
When the defrosting temperature and the sensor’s temperature are higher than 68ć, the frequency of the
compressor decreases 1hz/10seconds. Keep the frequency until it decreases to the lowest
Domestic air conditioner
sto
To Next Page
Loading...
