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Refrigeration/dehumidification:
The percentage of the
rated frequency P
K= Ki/the number of running machines
The indoor set
airflow speed
The percentage
of
the
frequency Ki
The calculation of the actual output frequency: when there is no healthy airflow: F =F-ED-* P K
When the healthy airflow has been set: F =F-ED-* P K airflow speed
When refrigerating, it is needed to satisfy
5.2.2 The outdoor fan control (exchange fan)
When the fan is changed among every airflow speed (including stop blowing), in order to avoid the
airflow speed from skipping frequently, it must be kept under each mode for over 30 seconds, and
then it can be changed to another mode (when refrigerating, the time is changed to 15 seconds).
5.2.2.1
The outdoor fan control when refrigerating or dehumidifying
After the compressor is started for 5 seconds, the outdoor fan is started at the medium speed at first,
after 30 seconds,it begins to control the airflow speed according to the temperature conditions of the
outdoor environment.
The temperature of the
outdoor air
Ta≥30
26 ≤Ta<30
24 ≤Ta<26
23 ≤Ta<24
5 ≤Ta<23
Ta<5
5.2.3 The control of the outdoor electronic expansion valve
When starting the compressor: the opening size of the valve must be guaranteed to have entered into
the standard opening size, and then the compressor can be started.
When refrigeration is in vain (the machine is shut down or is in the state of retrograde operation), the
opening size of the expansion valve of the indoor unit is 5 steps;
When heating is in vain, the opening size of the expansion valve of the indoor unit is 55 steps;
When the outdoor unit is shut down, the valve is opened completely for 2 minutes, and then begin
initialization.
The scope of refrigerationg valve
The valves are adjusted according to the degree of superheat —SHa
T
<1
50%
Breeze
Low
65
70%
rated
The temperature of the outdoor
Ta
coil Te
—
—
—
—
—
—
—
—
—
—
15 ≤Te
15 >Te
1
2
3
70%
100%
120%
Medium
High
Strong
90%
100%
180%
IN
< F<
90-----480 steps
22
Functions and Control
≥
4
140%
Quiet
Healthy
airflow
65%
70%
K healthy airflow
Airflow speed
H
g i
h
K
e
e
p
n i
g
h t
e
s
p
e
e
d
M
e
d
u i
m
K
e
e
p
n i
g
h t
e
s
p
e
e
d
L
o
w
Low
Stop
SHa.
Domestic Air Conditioner
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