Gree GMV5 Series Service Manual page 8

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
7 Oil equalizing device
Heat tape of oil equalizing
8
device
9 One-way valve
10 High-pressure sensor
11 Four-way valve
12 Heat exchanger
13 Fan
Defrosting temperature
14
sensor
Electronic expansion
15
valve for heating
16 One-way valve
Subcooler electronic
17
expansion valve
18 Subcooler
Liquid outlet temperature
19
sensor of subcooler
Inlet temperature sensor
20
of gas-liquid separator
Gas outlet temperature
21
sensor of subcooler
22 Low-pressure sensor
23 Gas-liquid separator
Outlet temperature sensor
24
of gas-liquid separator
25 Oil equalizing valve 1
26 One-way valve
27 Unloading valve
28 Oil equalizing valve 2
29 Filter
30 Capillary tube
31 Liquid valve
32 Air valve
Low-pressure
33
measurement valve
34 Oil balance valve
35 Oil check valve
36 Unloading valve
37 Air by-pass valve
38 Pressure-balanced valve
Equalizes the oil for all modules in the case of excess oil in the
current module when multiple modules are arranged in parallel,
thus ensuring the system reliability.
Maintains a proper oil temperature in the compressor when the
compressor is in standby status, ensuring the reliability of
compressor startup.
Prevents high-pressure gas from entering the compressor and fast
balances the suction pressure and discharge pressure in a
compressor.
Detects the high pressure value in the system in real time mode for
compressor protection and other control functions.
Used for the switching between the cooling and heating functions
of system IDU.
Used for outdoor heat exchange.
Strengthens heat exchanging.
Used for defrosting detection.
Controls refrigerant adjustment in heating mode.
Controls refrigerant flow direction.
Controls the degree of subcooling of tube refrigerant when the
system is running in cooling mode, and reduces the capacity loss
on pipes.
Controls the degree of subcooling of tube.
Detects tube temperature.
Detects the inlet temperature of gas-liquid separator to prevent the
system from running when the refrigerant flows back to the
compressor.
Detects gas temperature of subcooler.
Detects system low pressure to avoid extra-low operating
pressure.
Separate gas and liquid to prevent the system from running when
the refrigerant flows back to the compressor.
Detects internal status of gas-liquid separator to further control the
compressor suction performance.
Used for oil equalizing control among modules.
Used for oil equalizing control among modules and avoid reverse
flow of oil.
Avoids over-high pressure caused by pipeline blind spot.
Used for oil equalizing control among modules.
Prevents impurities from entering components and parts.
Supports flow regulating and pressure reduction.
Stop valve, closed when the unit is delivered from the factory and
will be opened after installation.
Stop valve, closed when the unit is delivered from the factory and
will be opened after installation.
Detects the low pressure value or charges refrigerant during
system running.
Stop valve, closed when the unit is delivered from the factory and
will be opened after installation.
Checks the quality of refrigerating machine oil of compressor
during maintenance.
Avoid over-high pressure caused by pipeline blind spot.
Avoids extra-high or low operating pressure.
Ensures success startup of compressor.
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