Functions and control
7.1.3˖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 90-----480 steps
The scope of heating valve 60-----480 steps
The valves are adjusted according to the degree of superheat —SHaˈƸSHa.
7.1.4˖Four way control
For the details of defrosting four-way valve control, see the defrosting process.
Four way working in other ways:
Under the mode of heating, open the four-way valve, when the compressor is not started or changed to
non-heating mode, make sure the compressor is stoped for 2 minutes, and then close the four-way valve.
Domestic air conditioner
19
During the compressor is started for 3 seconds, the outdoor fan is controlled the airflow speed
according to the temperature conditions of the outdoor environment.
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After the compressor is started for 3 seconds, the outdoor fan is controlled the airflow speed
according to the temperature conditions of the outdoor environment and frequency of compressor.
Frequency of cooling mode
˄Hz˅ <51 51ī70 ı70
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22ī29 Level 4 Level 6 Level 7
ı9
Level 7
Frequency of heat mode˄Hz˅ <51 51ī90 ı0
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10 Level 5 Level 7 Level 7
10ī16 Level 4 Level 5 Level 5
>16 Level 2
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