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5.2 The control system of outdoor unit
5.2.1 The operation frequency of outdoor unit and its control
5.2.1.1 The operation frequency control of compressor
The operation frequency scope of compressor
Mode
R
e
r f
g i
r e
t a
o i
n
5.2.1.2 The starting of compressor
When the compressor is started for the first time, it must be kept under the conditions of
58Hz,88Hz for one minute (the overheating protection of the outdoor unit air-blowing temperature,
immediately decrease the frequency when the compressor is overflowing and releasing the
pressure) then it can be operated towards the target frequency. When the machine runs normally,
there's no such process. After starting the compressor for operation, the compressor should run
according to the calculated frequency, and every determined frequency for protection should be prior
to the calculated frequency.
5.2.1.3 The speeds of increasing or decreasing the frequency of the compressor
The speed of increasing or decreasing the frequency rapidly 1 -----------1HZ/second
The speed of increasing or decreasing the frequency slowly 2 -----------1HZ/10seconds
5.2.1.4 The calculation of the compressor's frequency
1
The minimum/maximum frequency limitation
While refrigerating:
IN
1
The frequency limitation which is affected by the environment temperature.
Refrigeration/dehumidification mode::
Serial No.
1
2
3
4
5
Remarks: the above are not only the maximum frequency limitations of the complete appliance which
are affected by the environment, but also the maximum ability limitation of the system. When the
starting ability is not the maximum, its maximum frequency limitation is calculated by the following
equations:
The frequency limitation which is affected by the temperature and under the condition of actual ability
the actural running system ability*the maximum frequency which is limited by the temperature and
under the condition of maximum ability/the maximum designing ability of the system
T=
Ti*Pi / Pi ( Ti=|Tst_i-Tnh_i the indoor environment temperature| ;Pi i the ability of
the indoor unit)
Minimun operation frequency
2
0
H
z
is the minimum operation frequency of the compressor.
Temperature scope
W
h
_
c
<
2
8
W
h
_
c
<
3
2
W
h
_
c
<
4
0
W
h
_
c
<
4
8
≥
Wh_c
48
Maximun operation frequency
9
0
H
z
is the maximum operation frequency of the compressor;
Frequency limitation
M
a
x
_
h
z
1
4
5
M
a
x
_
h
z
2
8
0
M
a
x
_
h
z
3
9
0
M
a
x
_
h
z
4
8
0
Max_hz5 60 HZ
21
Functions and Control
H
Z
H
Z
H
Z
H
Z
Domestic Air Conditioner
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