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1
The minimum/maximum frequency limitation
A While refrigerating:
IN
is the minimum operation frequency of the compressor.
B While heating:
IN
is the minimum operation frequency of the compressor.
1
The frequency limitation which is affected by the environment temperature.
Heating mode:
Serial No.
Temperature scope
1
Wh_c<-12
2
W
3
W
4
W
5
W
6
W
7
W
8
Wh_c≥20
Remarks: the above are the maximum frequency limitations of the complete appliance which are
affected by the environment, and they have nothing to do with the ability of the indoor unit.
Refrigeration/dehumidification mode::
Serial No.
Temperature scope
1
W
2
W
3
W
4
W
5
Wh_c≥48
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)
Refrigeration/dehumidification:
The percentage of the
rated frequency P
Heating mode
T
The percentage of the
rated frequency P
is the maximum operation frequency of the compressor;
is the maximum operation frequency of the compressor;
h
_
c
<
8 -
h
_
c
<
2 -
h
_
c
<
5
h
_
c
<
1
2
h
_
c
<
1
7
h
_
c
<
2
0
h
_
c
<
2
8
h
_
c
<
3
2
h
_
c
<
4
0
h
_
c
<
4
8
T
<1
1
50%
70%
<1
1
50%
70%
22
Frequency limitation
Max_hz8
110Hz
M
a
x
_
h
z
7
1 1
0
H
z
M
a
x
_
h
z
4
1 1
0
H
z
M
a
x
_
h
z
5
1
0
0
H
z
M
a
x
_
h
z
1
9
0
H
z
M
a
x
_
h
z
2
8
0
H
z
M
a
x
_
h
z
2
7
0
H
z
Max_hz6
60Hz
Frequency limitation
M
a
x
_
h
z
1
5
5
H
Z
M
a
x
_
h
z
2
8
5
H
Z
M
a
x
_
h
z
3
8
5
H
Z
M
a
x
_
h
z
4
8
5
H
Z
Max_hz5 60 HZ
2
3
≥4
100%
120%
140%
2
3
≥4
100%
140%
160%
Domestic Air Conditioner
Functions and Control
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