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 —SHa
ˈƸ
SHa.
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
17
17
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
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51
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70
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70
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Level 3
Level 5
Level 6
22
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Level 4
Level 6
Level 7
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Level 7
Frequency of heat mode
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Hz
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90
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Level 5
Level 7
Level 7
10
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Level 4
Level 5
Level 5
!
Level 2
Summary of Contents for 1U71SABFRA
Page 11: ...Pinping diagrams Domestic air conditioner 4 Pinping diagrams Filter Filter ...
Page 12: ...Operation range Domestic air conditioner 5 Operation range 10 0 20 16 32 10 20 15 10 ...
Page 43: ...Seivice diagnosis Domestic air conditioner 41 ...
Page 44: ...Seivice diagnosis Domestic air conditioner 42 ...
Page 45: ...Seivice diagnosis Domestic air conditioner 43 ...
Page 56: ...Circuit diagrams Domestic air conditioner 54 ...
