18
DC Inverter Multi
VRF Service Manual
PRODUCT
6 Check valve(for STD1/ STD2)
It is used to prevent the high-pressure reverse gas going into the
xed-frequency compressor at the moment the compressor stops
so as to avoid abnormal startup next time and other problems.
7 Oil separator
It is used to separate the gas and oil so as to
guarantee the reliability of the compressor.
8 Check valve
It is used to prevent the high-pressure reverse gas going
into the modules at the moment that the unit stops
9 Four way valve It is used to change the status of the heat exchanger.
10 Heat exchanger It is used to exchanger heat outdoor.
11 Check valve It is used to reduce the pressure loss of the refrigerant ow.
12 Electronic expansion valve
It is used to adjust the degree of superheat and then
adjust the refrigerant ow to ensure the reliability
and sufcient heat exchange of the system.
13 Receiver It is used to store unused refrigerant to avoid abnormity.
14 Check valve (for cooling) It is used under the cooling mode.
15 Solenoid valve (for heating) It is used under the cooling mode.
16 Check valve It is used under the cooling mode.
17 Filter-drier
It is used to absorb moisture in the system so as to avoid “ice
plug” or “copper plating” on the surface of the compressor
18 High pressure sensor
It is used to detect the real-time high pressure for
protecting the compressor and other controls.
19 Low pressure sensor
It is used to detect the real-time low pressure for
protecting the compressor and other controls.
20 Solenoid valve (hot gas)
It is used to protect the system running under low pressure
or the compressor starting with pressure difference.
21 Solenoid valve (liquid bypass) It is used to prevent the compressor running at high temperature.
22 Accumulator
It is used to prevent the compressor running
at high humidity condition.
23 Solenoid valve(INV) It is used to return the lubricant to the inverter compressor.
24 Solenoid valve(STD1/ STD2) It is used to return the lubricant to the xed-frequency compressor.
25 Solenoid valve(Oil balance) It is used to balance the lubricant among modules.
26 Servicing valve
It is where the low pressure can be measured and
refrigerant can be charged for after-sales maintenance.
27 Liquid pipe It is the pipe to pass the refrigerant liquid of the system.
28 Gas pipe It is the pipe to pass the refrigerant gas of the system.
29 Oil balance pipe It is the pipe to balance the lubricant oil between modules.
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