dc inverter vrf system ii service manual(r410a)

dc inverter vrf system ii service manual(r410a)
DC INVERTER VRF SYSTEM II
SERVICE MANUAL(R410A)
CONTENTS
PRODUCT ...................................................................................................................................... 1
1 PRODUCT LIST .......................................................................................................................................... 1
2 NOMENCLATURE ...................................................................................................................................... 1
2.1 Nomenclature of outdoor units ........................................................................................................ 1
3 PRODUCT FEATURES .............................................................................................................................. 2
3.1 General introduction .......................................................................................................................... 2
3.2 Features .............................................................................................................................................. 2
4 SPECIFICATIONS ...................................................................................................................................... 3
4.1 Specifications ..................................................................................................................................... 3
4.2 Operation range ................................................................................................................................. 3
5 PRODUCT CAPACITY CORRECTION ...................................................................................................... 4
5.1Correction factor of indoor and outdoor temperature .................................................................... 4
5.2 Correction factor of pipe length and height difference .................................................................. 4
6 PRINCIPAL OF OPERATION ..................................................................................................................... 5
CONTROL ...................................................................................................................................... 8
1 UNITS’ CONTROL ..................................................................................................................................... 8
1.1 Schematic diagram of units’ control ................................................................................................ 8
1.2 Interpretation on the schematic diagram ........................................................................................ 8
2 REMOTE MONITORING SYSTEM ........................................................................................................... 8
2.1 General introduction .......................................................................................................................... 8
3 MONITORING SOFTWARE ...................................................................................................................... 9
3.1 Function introduction ........................................................................................................................ 9
3.2 Connection of computer and units .................................................................................................. 9
3.3 Parts introduction ............................................................................................................................ 10
3.4 Software introduction ...................................................................................................................... 13
INSTALLATION ............................................................................................................................ 53
1 ENGINEERING INSTALLATION PREPARATION AND NOTICE ............................................................. 53
1.1 Installation notice............................................................................................................................. 53
1.2 Installation key points and importance ......................................................................................... 53
2 INSTALLATION MATERIALS SELECTION .............................................................................................. 54
2.1 Refrigerant piping ............................................................................................................................ 54
2.2 Condensate water pipe .................................................................................................................... 55
2.3 Insulation material ........................................................................................................................... 55
2.4 Communication cable and control cable ....................................................................................... 55
2.5 Power cable ...................................................................................................................................... 56
2.6 Hanger rod and support .................................................................................................................. 56
3 INSTALLATION OF OUTDOOR UNIT ...................................................................................................... 56
3.1 Check before installation ................................................................................................................ 56
3.2 Selection of installation site ........................................................................................................... 56
3.3 Carrying and installing outdoor unit .............................................................................................. 56
3.4 Installation notices........................................................................................................................... 56
3.5 Fixing and damping of unit ............................................................................................................. 57
3.6 Outline dimension and position of installation hole .................................................................... 57
3.7 Installation space requirement ....................................................................................................... 57
DEBUGGING &MAINTENANCE .................................................................................................. 59
1 DEBUGGING OF UNIT............................................................................................................................. 59
1.1 Preparation for debugging .............................................................................................................. 59
1.2 Debugging of unit ............................................................................................................................ 59
1.3 Parameters reference value for the normal operation of unit ..................................................... 63
2 MALFUNCTION LIST ............................................................................................................................... 64
2.1 Malfunction list for the wired controller ........................................................................................ 64
2.2 Status display table for indicators on main board of outdoor unit............................................. 64
3 TROUBLESHOOTING .............................................................................................................................. 66
4 POWER DISTRIBUTION OF UNIT .......................................................................................................... 76
4.1 Power distribution of unit ............................................................................................................... 76
4.2 Main electric parts............................................................................................................................ 76
4.3 Circuit diagram ................................................................................................................................. 77
5 REMOVAL OF PARTS .............................................................................................................................. 79
5.1 Key parts ........................................................................................................................................... 79
5.2 Removal of key parts ....................................................................................................................... 81
6 COMMON MAINTENANCE ...................................................................................................................... 92
6.1 Vacuum drying for the system ........................................................................................................ 92
6.2 Fill and charge refrigerant ............................................................................................................... 92
6.3 Airtightness test ............................................................................................................................... 95
7 EXPLODED VIEW OF UNIT AND PARTS’ LIST ...................................................................................... 96
7.1 Exploed view for outdoor unit and parts’ list ................................................................................ 96
DC INVERTER VRF SYSTEM II SERVICE MANUAL(R410A)
PRODUCT
DC Inverter Multi VRF System II Service Manual
PRODUCT
1 Product List
Model
Product Code
Cooling
Capacity
Heating
Capacity
kW
kW
GMV-120WL/A-T
CN850W0180
12.1
14
GMV-140WL/A-T
CN850W0170
14
16.5
GMV-160WL/A-T
CN850W0160
16
18.5
GMV-120WL/A-X
CN850W0260
12.1
14
GMV-140WL/A-X
CN850W0250
14
16.5
GMV-160WL/A-X
CN850W0240
16
18.5
GMV-H224WL/A-X
CN850W0330
22.4
24
GMV-H280WL/A-X
CN850W0340
28
30
GMV-H335WL/A-X
CN850W0350
33.5
35
Power Supply
Refrigerant
220-240V 50Hz
208-230V 60Hz
R410A
380-415V
3N~50Hz
380-415V
3N~60Hz
R410A
380-415V
3N~50Hz
380-415V
3N~60Hz
R410A
Appearance
2 Nomenclature
2.1 Nomenclature of outdoor units
GMV
□
1
2
-
□
□
H
□
W
□
3
4
5
6
7
8
No.
1
Description
Product code
2
Suitable climate
/
□
□
□
□
9
10
11
12
Options
GMV-Gree Multi VRF Units
Blank-T1 condition; T2-low temperature climate;
T3-high temperature climate
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DC Inverter Multi VRF System II Service Manual
3
Unit type
4
Function code
5
6
7
Code
Code of cooling capacity
Code of outdoor unit
8
Unit structure
9
10
11
Refrigerant
Design No.
Power supply
12
Export
DC Inverter —omit
Q—Heat Recovery; S—Water Heater; W—Water-cooled Unit; X—Fresh Air
Unit
Leave blank if above functions are unavailable.
H – Only for GMV-H224WL/A-X, GMV-H280WL/A-X, GMV-H335WL/A-X
Nominal capacity/100(W)
W
M—Modular (top discharge); L—Non-modular (side discharge);
blank—Non-modular (top discharge)
R410A —omit
Named in order of A, B, C, or combined with 1, 2, 3…
7000~18000W, 1 phase—omit
T – 220-240V 50Hz or 208-230V 60Hz
X – 380-415V 3N~50Hz or 380-415V 3N~60Hz
3 Product Features
3.1 General introduction
Gree DC Inverter Multi VRF System II is the latest generation of DC inverter units. One set of
air-cooled outdoor unit can be connected with multiple direct evaporation indoor units that are of the
same or different forms and capacity. This refrigerating system can directly provide air conditioning for
one or more areas, and is applicable for residential and light commercial uses. It features high energy
efficiency, strong anti-interference capability, long connectable pipe, wide operation range, good sound
quality, intelligent capacity regulation, complete protection, etc.
3.2 Features
(1) Super high energy efficiency
The 2nd generation of DC Inverter Multi VRF System adopts DC motor to realize complete direct
current and upgrade the energy efficiency. EER is up to 3.97 and COP can reach 4.28.
(2) New generation CAN bus communication
Due to the latest communication method—CAN Bus Communication, system’s anti-interference
capability is stronger and the control on indoor units is more accurate, with higher reliability.
Specialized shield wire is no more needed and ordinary communication wire can be applied in
the construction, which has increased the installation flexibility.
(3) Long connection pipe
The maximum length of connection pipe is 300m (in total) and the farthest connection pipe
between indoor and outdoor units can be 120m’s long, which has extended the installation
condition and reduced the limit of installation distance.
(4) Wide operation range
Units can operate reliably in a wide temperature range (cooling: -5~52℃, heating: -20~27℃).
(5) Fine sound quality
Through a series of optimized measures, system has reduced the throttle noise and oil return
noise of indoor units, gas bypass noise, etc. so that units are more comfortable regarding sound
quality.
(6) Intelligent PID capacity regulation
With the independently developed PID capacity regulation technology, units are able to control
the indoor ambient temperature more quickly and reduce the fluctuation of room temperature.
(7) Complete protection
Units are equipped with a series of protection to accurately identify errors and protect the units,
which has ensured reliable and safe operation.
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DC Inverter Multi VRF System II Service Manual
4 Specifications
4.1 Specifications
GMV-120
WL/A-T
GMV-140
WL/A-T
GMV-160
WL/A-T
GMV-120
WL/A-X
GMV-140
WL/A-X
GMV-160
WL/A-X
GMV-H224
WL/A-X
GMV-H280
WL/A-X
GMV-H335
WL/A-X
kW
12.1
14
16
12.1
14
16
22.4
28
33.5
kW
14
16.5
18.5
14
16.5
18.5
24
30
35
6000
6300
6600
6000
6300
6600
8000
11000
11000
55
56
58
55
56
58
60
62
63
5
5
5
5
5
5
5.5
7.1
8
Model
Cooling
capacity
Heating
capacity
Circulating air
volume
Noise
Refrigerant
charge
volume
Energy
efficiency level
m3
/h
dB
(A)
kg
Le
vel
Power supply
Coo
kW
ling
Hea
kW
ting
Unit Dimensions
(mm)(WxDxH)
Package Dimensions
(mm)(WxDxH)
Rated
power
input
1
1
1
1
1
1
1
1
1
220-240V
~50Hz
208-230V
~60Hz
220-240V
~50Hz
208-230V
~60Hz
220-240V
~50Hz
208-230V
~60Hz
380-415V
3N~50Hz
380-415V
3N~60Hz
380-415V
3N~50Hz
380-415V
3N~60Hz
380-415V
3N~50Hz
380-415V
3N~60Hz
380-415V
3N~50Hz
380-415V
3N~60Hz
380-415V
3N~50Hz
380-415V
3N~60Hz
380-415V
3N~50Hz
380-415V
3N~60Hz
3.05
3.98
4.85
3.05
3.98
4.85
7.2
9.8
10.8
3.27
3.99
4.67
3.27
3.99
4.67
900×340×1345
998×458×1515
Compressor
QXAS-F428zX050A
QXAS-F428zX050C
6.5
8.8
10.2
940×320×
1430
1038×433
×1580
LNB53FC
AMC
940×460×
1615
1038×578
×1765
E656DHD65D2G
940×460×
1615
1038×578
×1765
E706DHD72D2G
Water-proof level
IPX4
IPX4
IPX4
IPX4
IPX4
IPX4
IPX4
IPX4
IPX4
Suitable climite
T1
T1
T1
T1
T1
T1
T3
T3
T3
Ф15.9
Ф15.9
Ф19.05
Ф15.9
Ф15.9
Ф19.05
Ф19.05
Ф22.0
Ф25.4
Ф9.52
Ф9.52
Ф9.52
Ф9.52
Ф9.52
Ф9.52
Ф9.52
Ф9.52
Ф12.7
Bell
mouth
connectio
n
Bell
mouth
connectio
n
Bell
mouth
connectio
n
Bell
mouth
connectio
n
Bell
mouth
connectio
n
Bell
mouth
connectio
n
BRAZE
connection
BRAZE
connection
BRAZE
connection
110
110
110
120
120
120
133
166
177
Gas
Conne
ction
pipe
Liqu
id
m
m
m
m
Connectio
n Method
Net weight
kg
Note:
① Units conform to design standard: EN 14511.
② Specifications may be changed due to product improvement. Please refer to nameplates of the units.
③ Noise data are collected from a semi-anechoic room. Decibels may be slightly higher in actual
operation due to environmental change.
④ Refrigerant charge volume listed in the table is based on the condition where indoor and outdoor
units are at a same level and with no connection pipe. Supplementary refrigerant needs to be
charged according to actual circumstance.
⑤ The sectional area of conducting wire is only applicable when the length is within 15m. If it’s over
15m’s long, sectional area must be increased accordingly, otherwise, over-current may burn the
wires.
4.2 Operation range
Cooling
Outdoor temperature: -5~52℃
Heating
Outdoor temperature: -20℃~27℃
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DC Inverter Multi VRF System II Service Manual
5 Product Capacity Correction
5.1Correction factor of indoor and outdoor temperature
1)Correction factor of cooling capacity
2)Correction factor of heating capacity
5.2 Correction factor of pipe length and height difference

Symbol description:
Hp: Height difference in case indoor unit is below outdoor unit (m);
Hm: Height difference in case indoor unit is above outdoor unit (m);
L: Length of one-way equivalent pipe
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DC Inverter Multi VRF System II Service Manual

Below table shows the capacity variance ratio for 100% full load in standard working condition
(thermostat setting is 16℃ for cooling and 30℃ for heating).
6 Principal of Operation
Components in flowcharts are presented according to the following table:
Name
Compressor
4-way valve
Cut-off valve
One-way valve
Capillary tube
Gas-liquid
separator
Pressure
switch
Pressure
sensor
Axial-flow finned heat
exchanger
Electronic expansion
valve
Symbol
Name
Symbol
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DC Inverter Multi VRF System II Service Manual
In cooling, the low-temperature and low-pressure refrigerant gas from each indoor heat exchanger
will be merged and inhaled by the compressor and then become high-temperature and high-pressure
gas, which will later be discharged into outdoor heat exchangers. By exchanging heat with outdoor air,
refrigerant will turn to liquid and flow to each indoor unit via Y-type branch or manifold. Pressure and
temperature of the refrigerant will then be lowered by throttle elements before it flows into indoor heat
exchangers. After exchanging heat with indoor air, refrigerant wil become low-temperature and
low-pressure gas again and repeat the circulation so as to realize the cooling effect. In heating, 4-way
valve will be energized to make refrigerant circulate in a reverse direction of cooling. Refrigerant will
release heat in indoor heat exchangers (electric heating elements will also work under certain
circumstance and release heat) and absorb heat in outdoor heat exchangers circularly so as to realize
the heating effect.
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DC Inverter Multi VRF System II Service Manual
CONTROL
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DC Inverter Multi VRF System II Service Manual
CONTROL
1 Units’ Control
1.1 Schematic diagram of units’ control
1.2 Interpretation on the schematic diagram
◆ High pressure switch is used to identify system’s high and low pressure. When pressure is too high,
the switch will break off and send a signal to main board. Main board will pass this signal to controller,
where the error will be displayed, and stop unit from working.
◆ High/low pressure sensor is used to test unit’s high/low pressure and send real-time data to
controller, which will control each unit’s output according to the control logic.
◆ Temperature sensors are used to test the tube temperature of the unit and send data to the controller,
which will control each unit’s output according to the control logic.
2 Remote Monitoring System
2.1 General introduction
Gree CAC Remote Monitoring System is an automatic central management system as well as an
intelligent power management system based on internet or local area network. It can provide a complete
set of air conditioning solutions, including remote monitor, malfunction alarms and visual management,
for the real-time, safe and efficient management of air conditioners.
Gree CAC Remote Monitoring System can save your cost on human resources and equipment
management. User can check the running status of air conditioners, turn units on or off, set temperature
or other functions just by means of a browser (e.g. IE, Firefox, Chrome) in every corner of the world.
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DC Inverter Multi VRF System II Service Manual
3 Monitoring Software
3.1 Function introduction
With the rapid development of building complex, more and more central air conditioners in various
models are used in different places, resulting in inconvenience for the management of air conditioners.
Integrating with telecommunication technology and computing software, Gree Commissioning Tool Kits
can realize the comprehensive monitor, control and commissioning on central air conditioners. It is an
efficient solution for the management of central air conditioners that are separated in different parts of a
building. Administrator doesn’t need to control every unit on site, but rather controls the units by just
sitting in front of a computer. This will not only improve the productivity, but also reduce cost on human
resources, property and management.
Gree Commissioning Tool Kits can monitor and control the 2nd generation of Gree Multi VRF. User
can monitor and control units by monitoring the computer. This software is an efficient tool for the
intelligent air conditioning management as well as installation and after-sales service and commissioning.
It can debug units and control units’ operation status quickly and conveniently. It will not only improve the
productivity but also reduce the difficulty and cost of commissioning and maintenance, providing better
and faster service to customers.
3.2 Connection of computer and units
It can be connected with single-system network or multi-system network. In the single-system
network, indoor units or outdoor units are connectable, while in the multi-system network, only the
master outdoor unit can be connected.
Seen from the diagram, Gree commissioing network is made up of 3 parts:
The 1st part is the monitoring computer, including Gree debugger and Gree USB converter driver that
are installed in the computer.
The 2nd part is Gree USB converter, which is to convert the air conditioning communication into
computing communication. This part is made up of Gree USB data converter and USB data wire.
The 3rd part is air conditioners, including outdoor units, indoor units and the connection wires. If
connection wire is not long enough, it’s OK to connect via the patching board of the commissioning tool
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DC Inverter Multi VRF System II Service Manual
kits. In a single-system network, both indoor units and outdoor units can be connected, while in a
multi-system network, only the master outdoor unit can be connected.
3.3 Parts introduction
3.3.1 List of parts
Name
Model
Material no.
Gree USB data converter
MC40-00/B
30118027
Gree Commissioning Tool Kits
(CD-ROM)
DG40-33/A(C)
36400000003
USB wire
\
40020082
Communicaiton board
\
30118015
Board connection wire (1m)
Board connection wire (5.5m)
Instruction manual
\
\
\
4001023229
4001023214
66174100018
Remark
Convert the air conditioning communication
into computing communication
Include Gree debugger, monitoring software,
USB driver and USB converter configuring
software.
Wire connecting computer’s USB interface
and converter
This board can be used when units are far
from the computer.
4-core wire connecting units and converter
4-core wire connecting units and converter
Instruction manual
3.3.2 Gree USB data converter
3.3.2.1 Functions introduction
Gree USB data converter will convert the RS485, HBS and CAN commucation within the air
conditioners into the communication that is recognizable by computer’s USB interface.
3.3.2.2 Appearance
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DC Inverter Multi VRF System II Service Manual
3.3.2.3 Operation instruction
 Power LED: a red light. If the red light is on, it indicates normal power supply. If the red light is off,
it indicates the power supply of converter is not normal.
 Communication LEDs: yellow lights. When converter is working and the computer is transmitting
data, the TX data transmitting light will be flickering. When units are uploading data to the
computer, the RX data receiving light will be flickering.
 When converter is under RS485 data transferring mode, the function LED of RS485 to USB will
be on.
 When converter is under CAN data transferring mode, the function LED of CAN to USB will be
on.
 When converter is under HBS data transferring mode, the function LED of HBS to USB will be
on.
 USB interface: connect USB data wire.
 CAN interface: When converter is under CAN communication mode, connect air conditioner’s
CAN data interface. CAN interface exhibits no polarity (A and B are equal).
 HBS interface: When HBS converter is under HBS communication mode, connect air
conditioner’s HBS data interface. HBS interface exhibits no polarity (This interface is not yet
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DC Inverter Multi VRF System II Service Manual
available for Gree debugger and the monitoring software).
 RS485 interface: When RS485 converter is under RS485 communication mode, connect air
conditioner’s RS485 data interface. RS485 interface exhibits polarity and terminal A and B are
different.
3.3.2.4 Installation notice
 Install indoors. To avoid collision, it is suggested to place it in the monitoring room together with
the computer.
 No need of power supply. Power is supplied through computer’s USB interface.
3.3.3 Communication board
Communication board is mainly used for transferring data. It functions similar with a patching board.
Provided that units are far away from the monitoring computer, communication board can be used for
connection.
3.3.4 Communication cord
3.3.4.1 USB wire
 Connect USB wire with computer’s USB interface at one end and with the USB interface of USB
data converter at the other end, as indicated below:
USB Wire
3.3.4.2 Board Connection Wire
 There are 2 board connection wires supplied for the commissioning tool kits. One is 1 meter’s
long and the other is 5.5 meters’ long. They are only different in length. One end of the wire shall
connect with air conditioner’s communication interface and the other end shall connect with CAN
interface of Gree USB converter. As shown below, the wire can be connected to the
communication interface of outdoor unit or the communication interface of indoor unit:
Board Connection Wire
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DC Inverter Multi VRF System II Service Manual
3.4 Software introduction
(1)One-button commissioning
Personnel responsible for the commissioning of air conditioners can start commissioning by
pressing one button according to the commissioning logic of software, which will give the
commissioning order to units. Then commissioning will be started up automatically step by step.
During the commissioning, the corresponding process will be ticked in green on the software
interface. If any commissioning process is not normal, it will be displayed in red.
(2)Comprehensive monitoring
The software can monitor every part of the air conditioning system, including functions, equipment
and components operating status. The monitoring results will be displayed in text or curve so that
user can acquire the operating status of the entire system conveniently and straightforwardly.
(3)Real-time control
Air conditioner’s operating time and requirements may be different based on areas and functions.
User can set units’ parameters on computer according to actual needs, such as the on/off,
temperature, fan speed, mode, etc. Meanwhile, the software can also set or view the function
parameters of outdoor units, gateway and other equipment. In this way, the mangement of central
air conditioners is realized.
(4)Replay history
Software can replay and save the historical monitoring information in the data base. The replay
speed can be selected and the information will be shown in text or curve. This function has greatly
saved the time to track problem cause and resolved the difficulty of problem reproduction.
(5)Applicable to multiple series, models and users
Gree Commissioning Tool Kits is applicable to air conditioning system that comsists of multiple
series and models. Later, it will be developed to cover all series of Gree central air conditioners,
such as multi VRF, centrifugal chiller, screw type chiller, ground source heat pump units, modular
units, fan coiled units, close control units, etc. It can be used by system and controller designers to
develop and monitor units, or used for maintenance and commissioning.
(6)Other functions
For the convenience of users, the software has added functions like connection guide, printing
screen, opening database folder, rebuilding database, changing database saving path, etc.
3.4.1 Software installation
3.4.1.1 Installation requirements
(1)Computer Configuration
1 GB at least
2 GB or above is preferred
10 GB available
Memory
Hard Disc
Core 2 or higher
1 GHz at least
2 GHz or above is preferred
CPU
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DC Inverter Multi VRF System II Service Manual
Operation System
Windows Server 2003 SP3 or higher
Windows XP SP3 or higher
Windows Vista
Windows 7
(2) CD Playing
Make sure you have administrator access to the computer and there is a CD-ROM in the computer.
Put the CD into the CD-ROM. If it’s automically running, then the following display will be shown. Or
double-click the file “Launcher.exe”.
For the first time to use Gree Commissioning Tool Kits, install these programmes: .Net Framework
4.0, USB Data Converter, Access Driver (necessary for versions below OFFICE 2007), Gree Debugger.
3.4.1.2 Installation flowchart
Button Graphics
This flowchart describes basically the software installation process. See below for details.
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DC Inverter Multi VRF System II Service Manual
3.4.1.3 Installation process
(1) Install .Net Framework 4.0
 If your computer has installed .Net Framework 4.0 or versions above, there’s no need to install
again. Otherwise, click “Install .Net Framework 4.0”.
 Extracting files
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DC Inverter Multi VRF System II Service Manual
 Click and select “I have read and accept the license terms”. Then click “Install”.
 Installation is in progress.
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DC Inverter Multi VRF System II Service Manual
 Click “Finish” to complete the installation.
(2) Install Access Driver
 Before operating Gree commissioning software, please first install Access Driver (necessary for
versions below OFFICE 2007). Click “Install Access Driver”.
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DC Inverter Multi VRF System II Service Manual
 Click ”Next”.
 Tick “I accept the terms in the License Agreement” and then click “Next”
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DC Inverter Multi VRF System II Service Manual
 Click “Browse” to change the default folder to the expected one, or click “Install” to continue the
installation.
 Installation is in progress.
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DC Inverter Multi VRF System II Service Manual
 Click “Ok” to complete the installation.
(3) Install Gree Debugger
 Before installing Gree debugger, make sure that your computer is installed with .Net Framework 4.0
or versions above. Then click “Install Gree Debugger”.
 Click “Next”.
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DC Inverter Multi VRF System II Service Manual
 Click “Browse” to select installation folder. If no change is needed for the folder, click “Next” to
continue the installation.
 Click “Next”.
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DC Inverter Multi VRF System II Service Manual
 Installation is in progress.
 Click “Close” to complete the installation.
(4) Install USB Converter Driver
 If USB converter driver is already installed in your computer, this part can be skipped. Otherwise,
click “Install USB Converter Driver”.
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DC Inverter Multi VRF System II Service Manual
 Then the following installation window will be shown.
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DC Inverter Multi VRF System II Service Manual
 This window will exit after installation is finished.
(5) Install Gree USB Data Converter
 If converter baud rate is needed to be set, then converter configuring software must be installed.
Click “Install Gree USB Data Converter”.

Then select the setup language. You can choose Chinese ”simplified”, Chinese “traditional” or
English. Then click “OK”.
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DC Inverter Multi VRF System II Service Manual

Click “Next”.

Tick “I accept the agreement”. Then click “Next” to continue installation.
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DC Inverter Multi VRF System II Service Manual

Click “Browse” to select your expected installation folder. Click “Next” to continue.

Click “Browse” to change folder. Click “Next” to continue.
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DC Inverter Multi VRF System II Service Manual

If you want to create s desktop shortcut, tick “Creat a desktop icon”. Then click “Next” to continue.

Destiniation location, folder and additional task will be shown in the next step. If you need to change
any of it, please click “Back”. If not, click “Install” to start installation.
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DC Inverter Multi VRF System II Service Manual

Installaiton is in progress.

Click “Finish” to complete the installation.
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DC Inverter Multi VRF System II Service Manual
3.4.2 Data monitoring

Start up Gree Debugger.

On the original interface, user can select language and units system. Click “OK” to confirm the
defaulted language and units system and start up the software.

Select language.
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DC Inverter Multi VRF System II Service Manual

Select system of units.

If units you want to monitor are already connected, and able to communicate normally, with correct
COM and protocal, then you may click “Connect” to enter the interface of numbers. Otherwise,
connect in accordance with the connection diagram shown below.
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DC Inverter Multi VRF System II Service Manual

COM selection: the serial port in your computer can be detected automatically. You just need to
select your desired serial port.

Protocal selection: This is to select the communication method of your units. Currently, CAN is
applicable to the units.
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DC Inverter Multi VRF System II Service Manual

After the selection, click “Connnect”. If units can communicate normally with computer, then the
interface of numbers will be shown soon. Otherwise, “Connecting” will be shown.
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DC Inverter Multi VRF System II Service Manual

There are several display zones on this interface. You can hide devices information and system
information by clicking devices information icon
and system icon
. Display zones of indoor
unit information and errors can be dragged up and down at the dividing lines. As to the display zone
of outdoor modules information, it can show information of only one module and hide information of
others (two modules are defaulted to be shown). Menu bar can be hidden by clicking icon
Status bar shows the current time and period for data collection.
Menu bar
Title bar
Error display
System info
Outdoor modules info
Devices info
IDU info
Status bar
33
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DC Inverter Multi VRF System II Service Manual

On the display zone of devices information, you may click to select and view units that need
monitoring.
3.4.3 Project debugging

Click icon of “Debug” on the menu bar and the interface will be switched to project debugging,
where auto debugging will be started from up to down and from left to right. Note: Debugging
function is only applicable to a single-system network.
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DC Inverter Multi VRF System II Service Manual

Click “Start” to enable the debugging function. Then debugging will be started up automatically.
indicates that debugging is in progress while

indicates debugging is completed.
If “OK” button is displayed, it means user needs to judge whether to continue debugging or not.
Click icon
and relevant information will be shown for your reference. Click “Close” to close the
pop-up (For No.3 Confirm ODU Basic Module NO. and No.4 Confirm IDU NO., the current number
of units under debugging will be displayed. See the following marked with circle. For No.8 Compr.
Preheat Confirmation, the preheat time will be displayed. See the following marked with circle).
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DC Inverter Multi VRF System II Service Manual

Icon
indicates that there is problem found during debugging. Debugging will not be completed
unless problem is solved (after problem is solved, step without “OK” button will switch to the next
step automatically, otherwise user needs to click “OK” to continue). Click icon
and relevant
information detected in this step will be displayed for your reference in order to solve problems.
Click “Close” to close the pop-up.

During debugging, a click on “Break” can stop debugging. Click “Start” to resume debugging and
then debugging will be finished step by step. For No.10 ODU Valves Check Before Startup, there
are “Back” and “Skip” buttons. If there is error in this step, you can back to step No.9 and click “OK”
to restart debugging on step No.10. If the error in step No.10 is U6 error (valve error alarm), you can
click “Skip”. In other cases, “Skip” button is null.

Step 11, 13 and 14 are reserved steps. And step 13, 14, 15 and 16 are steps in parallel (only one of
the four will be selected according to actual needs).
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DC Inverter Multi VRF System II Service Manual
3.4.4 Control units

Click icon of “Setting” on menu bar and select parameter settings, which include “Gateway Settings”,
“IDU Settings”, “System Settings”, “Project Number Conflict (In case there is project number conflict
in indoor units, other functions will be shielded. Then this parameter needs to be set in order to
eliminate the conflict)” and “System Historical Info”. Click the corresponding set and adjust the
parameters.

Take indoor unit as an example. Click “IDU Settings” and a dialog box will pop up.
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DC Inverter Multi VRF System II Service Manual

Tick the indoor units that need setting in the IDU selection zone or you may click “Select All” to
select all of them or “Select Inverted” to select none of them. After selection, the current values of
the corresponding parameters will be displayed in the zone of settings. Click “Set” and then click
in the pop-up dialog box to select values. Click “Set” and then the corresponding order will be
sent to units. If setting is successful, it will be displayed at the current values.
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DC Inverter Multi VRF System II Service Manual
3.4.5 Other functions
Capture screen
 Click icon of “Capture Screen” to print the interface. If you want to open the interface, click “Open”.
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DC Inverter Multi VRF System II Service Manual
Search for database folder

Click icon of “Open Data Folder” on the menu bar to open database folder.
Conversion of pressure value
 Click icon of “Others” on the menu bar and then click “Display Settings” to select “High Low
Pressure Value” and “Refrigerant Type”. Select “Temperature” and the pressure parameter
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DC Inverter Multi VRF System II Service Manual
displayed on the interface will be temperature. Select “Pressure” and the pressure parameter
displayed on the pressure interface will be pressure. Refrigerant type will affect the pressure
parameter displayed on the interface.
Database saving of multiple systems
 Click icon of “Others” on the menu bar and click “Database Save Settings” to select which system
that needs to save database. Because there is a large quantity of data in a network that contains
multiple systems, data of only one system can be saved.
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DC Inverter Multi VRF System II Service Manual
Change database saving path and rebuild database
 Change of database saving path and rebuilding of database should be set before the software starts
monitoring (see below interface). Click “Change database saving path” and click “Browse” to
change the saving path. Click “Rebuild Database” to rebuild the database folder. You can also stop
monitoring and turn back to the connection interface to change saving path or rebuild database
during monitoring.
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DC Inverter Multi VRF System II Service Manual
3.4.6 Usage of USB Converter
Usage of converter

Gree commissioning software should be connected with CAN interface when converter is used. For
air conditioners with a single system, connect D1 and D2 interfaces of the wiring board. For air
conditioners with multiple systems, connect G1 and G2 interfaces of the wiring board.
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DC Inverter Multi VRF System II Service Manual

Gree monitoring software should be connected with RS485 interface when converter is used.
Connect outdoor or indoor units or the mainboard of wired controller according to actual needs.

HBS, CAN and RS485 of the converter can be switched by buttons. Press the button “SET” on the
converter to realize the conversion among HBS, CAN and RS485 interfaces. You can check the
setting through the function LEDs.
Notice: If it’s the first time your PC uses Gree USB data converter, in order to prevent Gree USB
data converter from being mistaken by your computer as other devices and make sure your mouse
can work well, it is necessary to turn off the Serail Enumerator of computer after Gree USB data
converter is connected. Below are the steps:
Step 1: Right-click ”My Computer” on the desktop and click ”Manage”.
Step 2: In the pop-up window, select “Device Manager” in the left column and then find “Port
(COM and LPT)” in the right column. Click its
.
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DC Inverter Multi VRF System II Service Manual
Step 4: Right-click ”USB Serial Port (COM6) and then click ”Properties”. The dialog box of properties will
then pop up.
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DC Inverter Multi VRF System II Service Manual
Step 5: Then click ”Port Settings” in the dialog box.
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DC Inverter Multi VRF System II Service Manual
Step 6: Click ”Advanced” and then a new dialog box will pop up. Find the ”Serial Enumerator” in
the miscellaneous options and cancel the tick. Click ”OK” to exit.
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DC Inverter Multi VRF System II Service Manual
Usage of converter configuring software:

When the converter is working, hold the button ”SET” for 5 sec. Function LED will be flickering,
indicating that the converter has enter the baud rate setting mode. Then you can use the converter
configuring software to set the baud rate of converter. Baud rate supported by the converter (baud
rate of air conditioner’s communication interface matches with the baud rate of USB interface
automatically):
Ex-factory defaulted baud rate: (unit: bps)
AC is connected with
Baud rate of air conditioner interface
CAN
Baud rate of USB interface
115200
20000/50000 self-adaptive
HBS
57600
38400
RS485
9600
9600
Baud rate look-up table for RS485 interface (unit: bps)
RS485 interface
USB interface
4800
4800
9600
19200
38400
57600
115200
9600
19200
38400
57600
115200
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DC Inverter Multi VRF System II Service Manual
Baud rate look-up table for HBS interface (unit: bps)
HBS interface
9600
USB interface
4800
19200
9600
38400
57600
19200
38400
Baud rate look-up table of CAN interface (unit: bps)
CAN interface
20000
50000
100000
125000
USB interface
115200
115200
256000
256000

Double-click the desktop shortcut.

Select the needed communication serial port and language in the “System Settings”.
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DC Inverter Multi VRF System II Service Manual

Select the function that is to be set and the corresponding baud rate (refer to the look-up table) in
the “Converter Setup”.Then click “Set”.

If you want to restore ex-factory settings, click “Default” to restore the default settings.
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DC Inverter Multi VRF System II Service Manual

Click “Get” to get the current setting details of converter.

Switchover of Software Languages
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DC Inverter Multi VRF System II Service Manual
Installation
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DC Inverter Multi VRF System II Service Manual
INSTALLATION
1 Engineering Installation Preparation and
Notice
1.1 Installation notice
Personnel and property safety are highly concerned during the entire installation process.
Installation implementation must abide by relevant national safety regulations to ensure personnel and
property safety.
All personnel involved in the installation must attend safety education courses and pass
corresponding safety examinations before installation. Only qualified personnel can attend the
installation. Relevant personnel must be held responsible for any violation of the regulation.
1.2 Installation key points and importance
VRF air conditioning systems use refrigerant, instead of other agent, to directly evaporate to carry
out the system heat. High level of pipe cleanness and dryness is required in the system. Since various
pipes need to be prepared and laid out onsite, carelessness or maloperation during installation may
leave impurities, water, or dust inside refrigerant pipes. If the design fails to meet the requirement,
various problems may occur in the system or even lead to system breakdown.
Problems that usually occur during installation are as follows:
No.
Installation Problem
Possible Consequence
Pipes are more likely to be blocked; air conditioning performance is reduced;
Dust or impurities enter into the
compressor wear is increased or even hinder the normal operation of the system
1
refrigeration system.
and burn the compressor.
Nitrogen is not filled into the
Pipes are more likely to be blocked; air conditioning performance is reduced;
refrigerant pipe or insufficient compressor wear is increased or even hinder the normal operation of the system
2
Nitrogen is filled before welding.
and burn the compressor.
The refrigeration performance is reduced. The system fails to keep normal
The vacuum degree in the
operation due to frequent protection measures. When the problem getting serious,
3
refrigerant pipe is insufficient.
compressor and other major components can be damaged.
Copper plating may appear on the compressor and reduce the compressor
Water enters into the
efficiency with abnormal noise generated; failures may occur in the system due to
4
refrigeration system.
ice plug.
The refrigerant pipe
Smaller configuration specifications can increase the system pipe resistance and
specifications do not meet the
affect the cooling performance; larger configuration specifications are waste of
5
configuration requirements.
materials and can also reduce the cooling performance.
The cooling performance is reduced; in certain cases, it may cause long-term
compressor operating under overheat conditions; the lubricating effect can be
Refrigerant pipe is blocked.
6
affected and the compressor may be burnt if impurities were mixed with the
lubricating oil.
Refrigerant pipe exceeds the The loss in pipe is considerable and the unit energy efficiency decreases, which
7
limit.
are harmful for long-term running of the system.
The system cannot correctly control the flow allocation; the compressor may be
Incorrect amount of refrigerant is
operating under over-heating environment or running when the refrigerant flows
8
filled.
back to the compressor.
Insufficient refrigerant circulating in the system decreases the cooling performance
The refrigerant pipe leaks. of the air conditioner. Long-term operation under such circumstance may cause an
9
overheating compressor or even damage the compressor.
Water drainage from the
Residual water in IDUs can affect the normal operation of the system. The
condensate water pipe is not
10
possible water leakage can damage the IDU's decoration.
smooth.
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DC Inverter Multi VRF System II Service Manual
12
The ratio of slop for condensate
water pipe is insufficient or the Reverse slop or inconsistent connection of condensate water pipe can hinder the
condensate water pipe is
smooth drainage and cause leakage of the IDU.
incorrectly connected.
The air channel is improperly
The air channel will deform; vibration and noise occur during unit operating.
fixed.
13
The guide vane of air channel is
not reasonably manufactured.
14
The refrigerant pipe or
Water can easily condensate and drip to damage the indoor decoration, or even
condensate water pipe does not
trigger the protection mode of system due to overheating operation.
meet the insulation requirement.
15
The installation space for IDU is Since there is a lack of space for maintenance and checking, indoor decoration
insufficient.
might need to be damaged during such operation.
16
The IDU or the location of the air
outlet or return air inlet is not
designed reasonably.
11
Uneven air quantity allocation reduces the overall performance of the air
conditioner.
The air outlet or return air inlet may be short-circuited, thus affecting the air
conditioning performance.
The ODU is difficult to be maintained; unit exhaust is not smooth, which reduces
the heat exchanging performance or even prevent the system from normal
17 The ODU is improperly installed. operation; in addition, the cold and hot air for heat exchange and the noise may
annoy people in surrounding areas.
18
19
20
Power cables are incorrectly
Unit components may be damaged and potential safety hazard may occur.
provided.
Control communication cables
The normal communication in the system fails or the control over IDUs and ODUs
are incorrectly provided or
turn in a mess.
improperly connected.
Control communication cables
The communication cables are short-circuited or disconnected, and the unit
are not properly protected.
cannot be started up due to communication failure.
Understand the special requirement (if any) for unit installation before implementation to ensure
installation quality. Relevant installers must have corresponding engineering construction qualifications.
Special type operators involved in the engineering implementation, such as welders, electricians,
and refrigeration mechanics must have relevant operating licenses and are accredited with vocational
qualification certification.
2 Installation Materials Selection
The materials, equipment and instruments used during air conditioning engineering construction
must have certifications and test reports. Products with fireproof requirements must be provided with
fireproof inspection certificates and must meet national and relevant compulsory standards.
If
environmentally-friendly materials are to be used as required by customers, all such materials must meet
national environmental protection requirement and be provided with relevant certificates.
2.1 Refrigerant piping
a. Material requirement: Dephosphorization drawing copper pipe for air conditioners;
b. Appearance requirement: The inner and outer surface of pipe should be smooth without pinhole, crack,
peeling, blister, inclusion, copper powder, carbon deposition, rust, dirt or severe oxide film, and without
obvious scratch, pit, spot and other defects.
c. Test report: Certifications and quality test reports must be provided.
d. The tensile strength must be at least 240 kgf/mm².
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DC Inverter Multi VRF System II Service Manual
e. Specifications requirement
R410A Refrigerant System
OD (mm/inch)
Wall Thickness (mm)
Model
Ф6.35(1/4)
≥0.8
0
Ф9.52(3/8)
≥0.8
0
Ф12.70(1/2)
≥0.8
0
Ф15.9(5/8)
≥1.0
0
Ф19.05(3/4)
≥1.0
0
Ф22.20(7/8)
≥1.2
0
Ф25.40(8/8)
≥1.2
0
f. After the inner part of the copper pipe is cleaned and dried, the inlet and outlet must be sealed tightly
by using pipe caps, plugs or adhesive tapes.
2.2 Condensate water pipe
a. Pipes that can be used for air conditioner drainage include: water supplying UPVC pipe, PP-R pipe,
PP-C pipe, and HDG steel pipe;
b. All relevant certificates and quality test reports are provided.
c. Requirements for specifications and wall thickness
Water supplying UPVC pipe: Ф32mm×2mm,Ф40mm×2mm,Ф50mm×2.5mm;
HDG steel pipe: Ф25mm×3.25mm,Ф32mm×3.25mm,Ф40mm×3.5mm,Ф50mm×3.5mm.
2.3 Insulation material
a. Rubber foam insulation material;
b. Flame retardancy level: B1 or higher;
c. Refractoriness: at least 120℃;
d. The insulation thickness of condensate water pipe: at least 10 mm;
e. When the diameter of copper pipe is equal to or greater than Ф15.9 mm, the thickness of insulation
material should be at least 20 mm; when the diameter of copper pipe is less than 15.9 mm, the
thickness of insulation material should be at least 15 mm.
2.4 Communication cable and control cable
Note: For air conditioning units installed in places with strong electromagnetic interference, shielded
wire must be used as the communication cables of the IDU and wired controller, and shielded twisted
pairs must be used as the communication cables between IDUs and between the IDU and ODU.
Communication cable selection for ODU and IDUs
Wire Type
Common sheath
twisted pair copper
core (RVV)
Communication Cables
Between IDU and
Number of Wire Pieces
Indoor (Outdoor) Unit x Wire Diameter (mm2)
L(m)
L≤1000
≥2×0.75
Wire Standard
Remark
GB/T 5023.3-2008
If the wire diameter is
enlarged to 2×1mm2,
the overall
communication length
can reach 1500 m.
Wire Standard
Remark
GB/T 5023.3-2008
The overall
communication length
cannot exceed 250 m.
Communication cable selection for IDU and wired controller
Wire Type
Common sheath
twisted pair copper
core (RVV)
Total Length of
Communication Cables Number of Wire Pieces
of the IDU and Wired x Wire Diameter (mm2)
Controller L(m)
L≤250
≥2×0.75
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DC Inverter Multi VRF System II Service Manual
2.5 Power cable
Only copper conductors can be used as power cables. The copper conductors must meet relevant
national standard and satisfy the carrying capacity of unit.
2.6 Hanger rod and support
a. Hanger rod: M8 or M10;
b. U-steel: 14# or above;
c. Angle steel: 30mm×30mm×3mm or above;
d. Round steel: Ф10mm or above
3 Installation of outdoor unit
3.1 Check before installation
a. Before installation, please check the power cord if it complies with the power supply requirement on
the nameplate. Make sure the power supply is safe.
b. This air conditioner must be properly grounded through the receptacle to avoid electric shock. The
ground wire shouldn’t be connected with gas pipe, water pipe, lightning arrester or telephone line.
c. Maintain good air circulation to avoid lacking oxygen.
d. Read this manual carefully before installation.
3.2 Selection of installation site
a. Select a location which is strong enough to hold unit’s weight so that unit can stand still and erect.
b. Make sure the unit is not exposed to sun and rain. And the location can resist dust, typhoon and
earthquake.
c. Please keep the unit away from inflammable, explosive and corrosive gas or waste gas.
d. Make sure the location has space for heat exchange and maintenance so that unit can operate
reliably with good ventilation.
e. ODU and IDU should stay as close as possible to shorten the length of refrigerant pipe and reduce
bend angles.
f. Select a location which is out of children’s reach. Keep the unit away from children.
3.3 Carrying and installing outdoor unit
When carrying the outdoor unit, hang the unit in four directions with two sufficient ropes. In order to
avoid excursion from the center, the angel of ropes must be smaller than 40º during hanging and
moving.
3.4 Installation notices
In order to ensure proper operation, the selection of installation site must conform to the following
principle:
●The discharged air of outdoor unit will not flow back and there is sufficient space around the unit for
maintenance;
●The installation site must be well ventilated to ensure sufficient air intake and discharge. Make sure
there is no obstacle at the air inlet and air outlet. If there is any obstacle, please remove it;
●The installation site shall be able to withstand the weight of outdoor unit and capable for soundproof
and vibration. The air outlet and noise of unit will not affect neighbors;
●The hanging of outdoor unit must use appointed hanging hole. Pay attention to protect the unit during
hanging and installation. Prohibit hitting the sheet metal to avoid rust in the future.
●Avoid direct sunlight;
●The rain and condensation water can be drained out smoothly;
●The outdoor unit will not be embedded by the snow and not affected by garbage and oil smog;
●The installation of outdoor unit shall adopt rubber damping pad or spring damper to reduce noise and
vibration;
●The installation dimension shall accord with the installation requirement of this manual and the outdoor
unit must be fixed at the installation site;
●The installation shall be done by professional technicians.
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DC Inverter Multi VRF System II Service Manual
3.5 Fixing and damping of unit
The outdoor unit shall be fixed with 4 M12 bolts and closely contacted with the foundation. Otherwise,
big vibration and noise will be caused.
The outdoor unit shall be fixed firmly. The rubber board with thickness over 20mm or corrugated
rubber damping pad shall be applied between the unit and foundation.
3.6 Outline dimension and position of installation hole
When carrying the outdoor unit, hang the unit in four directions with two sufficient ropes. In order to
avoid excursion from the center, the angel of ropes must be smaller than 40º during hanging and
moving.
Model
A
B
C
D
E
GMV-120WL/A-T\GMV-140WL/A-T
GMV-160WL/A-T\GMV-120WL/A-X
GMV-140WL/A-X\GMV-160WL/A-X
900
340
1345
572
378
GMV-H224WL/A-X
940
320
1430
632
350
GMV-H280WL/A-X\GMV-H335WL/A-X
940
460
1615
610
486
3.7 Installation space requirement
If all sides of the ODU (including the top) are surrounded by walls, process according to the following
requirements for installation space:
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DC Inverter Multi VRF System II Service Manual
DEBUGGING &MAINTENANCE
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DC INVERTER VRF SYSTEM II SERVICE MANUAL(R410A)
DEBUGGING &MAINTENANCE
1 Debugging of Unit
Caution:
1. After the initial installation is finished and the main board of outdoor unit is replaced, it must perform
debugging. Otherwise, the unit can’t operate.
2. The debugging must be performed by professional person or under the the guide of professional
person.
1.1 Preparation for debugging
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Do not disconnect the power before the installation is finished,
All wires for controller and electric wires must be connected correctly and reliably.
Check the the fixing ring of the foot of compressor for transportaion is removed.
Remove all sundries from the unit, such as metal chips, joint, forceps holder, and so on.
Check whether the appearance and pipeline system are damaged during carry or transportation
process.
Calculate the required added refrigerant-charging volume according to the length of pipe of system
and pre-charge the refrigerant. If refrigerant can’t be added any more when the required
refrigerant-charging volume hasn’t been reached, record to refrigerant volume which still needs to
be added and continue to add refrigerant during run test operation process. Please refer to below
run test for the refrigerant-adding stage during run test process.
After adding refrigerant, please make sure the valve for outdoor is opened completely.
For the convenient of troubleshooting, the unit can’t be connected to the PC which installed with
related debugging software and make sure that the the datas in real time of this unit can be
inspected by this computer. Please refer to Service Manual for the installation and connection of
the bebugging software.
Before turn test, please do make sure that the preheat time for compressor is 8h above and touch
the compressor to see whether preheat is normal. You can perform run test only after normal
preheat. Otherwise, it may damage the compressor.
1.2 Debugging of unit
Debugging procedure for test run, display instruction for indicator on main board of outdoor unit and
operation method are as below:
Stage process instruction for debugging
——
Process
01_ Main
control unit
setting
02_ Address
distribution
Debugging
code
LED1
Process code
Status code
LED2
LED3
Code
Display
status
Code
ON
01
ON
AO
Displ
ay
status
ON
db
ON
01
ON
OC
ON
db
ON
02
ON
Ad
Flash
db
ON
02
ON
L7
Flash
db
ON
02
ON
OC
ON
Cod
e
Display
status
db
Code instruction and operation method
No debugging status for system
Press SW7 button on main board for 5s
to start system debugging. The indicator
on main board is displayed as shown in
the left. 2s later, it will enter into next step
determination.
Address distribution for the system. 10s
later, the display is as below:
No main indoor unit. Display will be kept
for 1min. Within 1min, set the main indoor
unit through debugging software. If notset
the main indoor unit by hand within 1min,
the system will automatically set the
minimum IP address as the main indoor
unit.
The distribution for the system address is
finished. 2s later, it will enter into the next
step determination automatically.
DC Inverter Multi VRF System II Service Manual
Stage process instruction for debugging
——
Debugging
code
LED1
LED3
Code
Code
ON
03
ON
01
Flash
db
ON
03
ON
OC
ON
db
ON
04
ON
01~80
Flash
db
ON
04
ON
OC
ON
db
ON
05
ON
C2
ON
db
ON
05
ON
OC
ON
db
ON
05
ON
CH
ON
db
ON
05
ON
CL
ON
db
ON
06
ON
Correspond
ing error
code
ON
Display
status
03_Quantity
confirmation of
outdoor unit
db
06_Parts
detection for
outdoor unit
LED2
Displ
ay
status
Cod
e
05_Internal
communication
and capacity
ratio inspection
for between
indoor unit and
outdoor unit
Status code
Display
status
Process
04_Quantity
confirmation of
indoor unit
Process code
60
Code instruction and operation method
Cofirmation process of system. 1s later, it
will enter into the next step automatically.
Cofirmation process of system. 2s later, it
will enter into the next step automatically.
LED3 displays quantity of indoor unit.
The quanity of indoor unit shall be
confirmed by perform. If the actural
quantity of indoor unit is different from the
displayed quantity, cut off the power for
indoor unit and outdoor unit. Check
whether the communication wire for
indoor unit is normal. After that, put
through the power and start debugging
from step 01. If the quantity of indoor
unit is correct, press SW7 button on main
board to confirm it. The display is as
below after confirmation:
Confiration for the quantity of indoor unit
of finished. 2s later, it will enter into the
next step automatically.
Communication between main board of
outdoor unit and drive is abnormal.
Please check whether the
communication wire connecting main
board of outdoor unit and drive board is
normal? It will enter into the next
operation after troubleshooting. If it
needs to cut off the power during
troubleshooting process, start the
debugging from step 01 after
energization.
Normal communication between main
board of outdoor unit and drive. It will
displays for 2s by the left method. With
this 2s, the capacity ratio for indoor unit
and outdoor unit will be detected
automatically. If it hasn’t exceeded the
capacity ratio range, it will enter into next
step determination after 2s; if it has
exceed the capactiry ration, display is as
below:
The rated capacity ratio for indoor unit is
high. Change the combination for indoor
unit and outdoor unit to let their capacity
ration is within the reasonable range.
Perfrom the debugging again from step
01.
The rated capacity ratio for indoor unit is
low. Change the combination for indoor
unit and outdoor unit to let their capacity
ration is within the reasonable range.
Perfrom the debugging again from step
01.
Malfunction of parts for outdoor unit.
LED3 displays corresponding
malfunction code. After troubleshooting, it
will enter into the next step determination
automatically. If it needs to cut off the
power for the outdoor unit during
DC Inverter Multi VRF System II Service Manual
Stage process instruction for debugging
——
Process
Debugging
code
LED1
Cod
e
Display
status
Process code
Status code
LED2
LED3
Code
Display
status
Code
Displ
ay
status
Code instruction and operation method
troubleshooting process, perform the
debugging again from step 01 after
energization.
07_Parts
detection for
indoor unit
08_ Preheat
confirmation
for compressor
09_
Refrigerant
confirmation
before startup
10_ Status
determination
db
ON
06
ON
OC
ON
db
ON
07
ON
XXXX/corre
sponding
error code
ON
db
ON
07
ON
OC
ON
db
ON
08
ON
UO
ON
db
ON
08
ON
OC
ON
db
ON
09
ON
U4
ON
db
ON
09
ON
OC
ON
db
ON
10
ON
ON
ON
61
When there’s no malfunction of parts for
outdoor unit, it will enter into the next step
determination automatically after 10s.
The system detected that there’s
malfunction for the parts of indoor unit.
XXXX indicates the engineering series
code for the indoor unit with malfunction.
3s later, corresponding malfunction code
will be displayed. Eg: When there is
malfunction d5 and d6 for no. 1 indoor
unit, and malfunction d6 and d7 for no.
792 indoor unit, LED3 nixie tube will
display 00, 01, d5, d6, 07, 92, d6, d7
cyclely evey 2s. After troubleshooting, it
will enter into the next step determination
automatically. If it needs to cut off power
for outdoor unit during troubleshooting
process, perform the debugging again
from step 01 after energization.
No parts malfunction for indoor unit. 2s
later, it will enter into the next
determination automatically.
Preheat time for compressor is not
reached to 8h. Indicator will display as
shown by the left method until the reheat
time for compressor is reached to 8h. or
short press SW7 button on main board
to confirm that the preheat time is
reached to 8h and then enter into the
next determination. (Note: If compressor
isn’t started up when the preheat time is
not reached to 8h, the compressor may
be damaged. Please be careful.)
Preheat time for compressor is reached
to 8h. 2s later, it will enter into the next
step.
Refrigerant in system is not sufficient.
The indicator will display by the left
method. Please disconnect the power for
indoor unit and outdoor unit, and check
whether the pipeline is leaking. After
leakage problem is solved, recharge the
refrigerant according to requirement.
After that, energize the unit and perform
the debugging from step 01. (Note: Cut
off the power for the unit before
recharging the refrigerant to prevent the
unit entering into step 10 during
refrigerant-charging process)
The refrigerant volume for the system is
normal. After it displayes as the left
method for 2s, it will enter into the next
determination automatically.
Dermination status for valve of outdoor
unit; After compressor operating for
DC Inverter Multi VRF System II Service Manual
Stage process instruction for debugging
——
Process
Debugging
code
LED1
Cod
e
Display
status
Process code
Status code
LED2
LED3
Code
Display
status
Code
Displ
ay
status
for outdoor
unit’s valve
before startup
db
ON
10
ON
U6
ON
db
ON
10
ON
OC
ON
db
ON
12
ON
AP
Flash
db
ON
12
ON
AE
ON
db
ON
15
ON
AC
ON
db
ON
15
ON
Correspodi
ng error
code
ON
db
ON
16
ON
AH
ON
db
ON
16
ON
Correspodi
ng error
code
ON
00
ON
AC/AH
ON
OFF
ON
12_
Debugging
confirmation
for the unit
15_Debugging
operation for
cooling
16_Debugging
operation for
heating
17_ Finished
status of
debugging
62
Code instruction and operation method
about 2min, it will stop operation. It will
judge the ON status of gas valve and
liquid valve for outdoor unit. The
judement result is displayed as below:
Valve for outdoor unit hasn’t been
opened completely. Short press SW6
button on main board and the
indicator will display “db 09 OC” and
then check whether gas valve and liquid
valve for outdoor unit are opened
completely. After that, short press SW6
button on main board again. After
compressor is started up and operated
for about 2min, it will judge the status of
valve again.
Normal status for valve. After it displays
as the left method for 2s, it will enter into
the next determination automatically.
Wait for confirming the debugging order
for the unit. Short press SW7 button on
main bard to confirm the debugging of
unit. 2s later, the indicator on main board
will display as below:
Confirmation of startup of the unit.
After displaying for 2s, the system will
select “15_cooling ddebugging
operation” or “16_heating debugging
operation”automatically according
ambient temperature to start up
operation. If it needs to add refrigerant
because of engineering requirement
while the refrigerant hasn’t been added
finished before debugging, refrigerant
can be added through low-pressure
detection valve during operation process.
Debugging under cooling mode. If there’s
no malfunction after the compressor
operates for 20min, it will enter into
process 17 to finish debugging; If there’s
malfunction during operation process, the
display is as below:
There’s malfunction during debugging
process under cooling mode. After
removing all malfunctions, it will enter into
the next step determination.
Debugging under heating mode. If there’s
no malfunction after the compressor
operates for 20min, it will enter into
process 17 to finish debugging; If there’s
malfunction during operation process, the
display is as below:
There’s malfunction during debugging
operation under heating mode. The unit
will enter into the next step determination
after elimanted all malfunctions.
Debugging is finished for the complete
unit. The system is at standby status.
DC Inverter Multi VRF System II Service Manual
1.3 Parameters reference value for the normal operation of unit
No.
Debugging project
1
Parameters
name
Outdoor
ambient
temperature
Unit
Reference value
℃
——
2
Discharge
temperature of
compressor
℃
3
Defrosting
temperature
℃
4
High pressure
of system
℃
Low pressure
of system
℃
Parameters
of outdoor
unit
5
Paramers
of system
6
7
8
9
10
11
12
13
14
Parameters
of indoor
unit
Opening angle
of electrocnic
expansion
valve for
heating
Operation
frequency for
compressor
Operation
current of
compressor
IPM module
temperature for
compressor
Operation
frequenc for fan
Ambient
temperature for
indoor unit
Entry tube
temperature for
indoor heat
exchanger
Entry tube
temperature for
indoor heat
exchange
Opening angle
●After compressor is started up, normal discharge temperature
for cooling is 70~105℃, which is 10℃ above more than the
high pressure saturation temperature.
●The normal temperature for heating is 65℃~90℃, which is
10℃ above more than the high pressure saturation
temperature.
●During cooling operation, defrosting temperature is 4~10℃
lower than the high pressure value of system;
●During heating operation, defrosting temperature is almost
equal to the low pressure value of system (the disffrence is
withing 2℃).
●Under cooling mode, the normal high pressure value is
20℃~55℃. According to the change of ambine temperature
and operation capacity of system, the high pressure value of
system is 10℃~30℃ higher than the ambient temperature.
The higher the ambient temperature, the temperature
difference is small; Under cooling operation at the ambient
temperature of 25~35℃, the high pressure value for the
system is 44~53℃;
●The unit will operate at heating mode when the ambient
temperature is above -5℃. The high pressure value for the
system is 40~52℃. When the ambient temperature is low and
the indoor unit is started up frequently, the high pressure value
will be a little lower.
●The unit will operate under cooling mode when the ambient
temperature is 25~35℃, the low pressure value for the system
is 0~8℃.
●The unit will operate under heating mode when the ambient
temperature is above -5℃, the low pressure value for the
system is -15~8℃.
PLS
●During cooling operation, the electronica expansion valve for
heating will always be kept at 480PLS;
●During heating operation, the opening angle for the adjusted
electronic expansion valve is 55~480PLS.
HZ
Change among 10HZ~95HZ
A
Current should be no more than 25.0A during normal operation
for compressor
℃
HZ
When ambient temperature is lower than 35℃, temperature for
IPM module is lower than 80℃. The maximum temperature
won’t exceed 95℃.
It will adjust the frequency among 0~49HZ for operation
according to the system pressure
——
℃
℃
℃
PLS
●According to the difference of ambient temperature, the entry
tube temperature is 1℃~7℃ lower than the exit tube
temperature for the same indoor unit under cooling mode;
4~9℃ higher than low pressure.
●Under heating mode, entry temperature is 10℃~20℃ lower
than exit tube temperature for the sae indoor unit.
Under cooling mode, the opening angle for indoor electronic
63
DC Inverter Multi VRF System II Service Manual
No.
Parameters
name
of indoor
electrocnic
expansion
valve
Debugging project
Unit
Reference value
expansion valve is adjusted among 70~480PLS.
Under heating mode, the opening angle for indoor unit is
adjusted among 40~480PLS.
15
Communication
paraters
Communication
data
—
16
Drainage syste
——
—
17
Other
——
Through debugging software, it detected that the quantity of
indoor unit is same with the enginerring actural quantity.
There’s no communication malfunction.
Water can be drained smoothly for indoor unit; Outdoor unit
can drain water fromo drainage pipe completely.
2 Malfunction List
2.1 Malfunction list for the wired controller
Display
code
Content
Display
code
Content
Display
code
Content
L0
Malfunction of
indoor unit
L9
Wrong number of indoor
unit for one-to-more indoor
unit
d8
Malfunction of water
temperature sensor
L1
Indoor fan
protection
LA
Wrong series for
one-to-more indoor unit
d9
Malfunction of jumper cap
L2
E-heater protection
LH
Alarming due to bad air
quality
dA
Abnormal address for
indoor unit
L3
Water overflow
protection
LC
The indoor unit model can’t
match with outdoor unit
model
dH
Abnormal PCB for wired
controller
d1
Poor indoor PCB
dC
Abnormal code-dialing
setting of capacity
d3
Malfunction of ambient
temperature sensor
dL
Malfunction of air exhause
temperature sensor
L4
L5
Power supply
of wired controller
is faulted
Freeze prevention
protection
L6
Mode shock
d4
Malfunction of entry tube
temperature sensor
dE
Malfunction of indoor C02
sensor
L7
No main indoor unit
d6
Malfunction of exit tube
temperature sensor
C0
Communication malfunction
L8
Insufficient power
supply
d7
Malfunction of humidity
sensor
AJ
Clean alarming for filter
db
Special code: engineering debugging code
2.2 Status display table for indicators on main board of outdoor unit
Definition:

LED1: It displays “00” for hot water mode as for DC Inverter Side Discharge VRF

LED2: It displays “AC” for AC mode, cooling and cooling OFF mode for indoor unit, and displays
“AH” for heating and heating OFF mode for indoor unit

LED3: It displays on or off status of compressor and malfunction code. It displays “ON” when the
compressor is operating and “OFF” when the compressor stops operation. When there’s
malfunction for the unit, it will display corresponding malfunction code; when there’re multiple
malfunctions, the malfunction codes will be displayed in turn.
Display code table of outdoor unit is as below:
Display
code
Content
Display
code
Content
Display
code
Content
E0
Malfunction of
outdoor unit
E1
High pressure protection
E2
Low-temperature
protection for dicharge
64
DC Inverter Multi VRF System II Service Manual
Display
code
Content
Display
code
Content
Display
code
E3
Low pressure
protection
E4
Discharge high temperature
protection for compressor
EC
F1
Malfunction of high
pressure sensor
F3
J0
Other module protection
J1
Overcurrent protection for
compressor 1
J9
Low pressure ratio
protection of system
b2
Maflunction of defrosting
temperature sensor 1
F0
F5
J7
JL
b3
b6
bH
P2
P5
P8
PC
PF
U0
U5
U9
UE
C3
C6
CA
Poor main board of
outdoor unit
Malfunction of
discharge
temperature sensor
for compressor 1
Air-mixing protection
for 4-way valve
High pressure is too
low
Maflunction of
defrosting
temperature sensor
2
Malfunction for
temperature sensor
of inlet tube of gas
and liquid separator
Abnormal clock of
system
Power voltage
protection for the
driven board of
compressor
Overcurent
protection for
inverter compressor
Overheating
protection for driven
IPM of compressor
Circuit malfunction
of driven current
detection for
compressor
Malfunction of
driven charging loop
for compressor
Preheat time is not
enough for
compressor
Wrong address for
the driven board of
compressor
Malfunction of
pipeline for outdoor
unit
Refrigerant-charging
is invalid
Driven
communication
malfunction
between main board
and inverter
compressor
Alarming due to
wrong quanity of
outdoor unit
Energycy status of
J8
b1
High pressure ration
protection of system
Malfunction for outdoor
ambient temperature
sensor
Content
Loose protection for
discharge temperature
sensor for compressor 1
Malfunction of low
pressure sensor
b4
Malfunction of liquid
temperature sensor for
subcooler
b5
Malfunction of gas
temperature sensor for
subcooler
b7
Malfunction for temperature
sensor of exit tube of gas
and liquid separator (exit
tube A)
b9
Malfunction of gas exit
temperature sensor for
heat exchanger
P0
Malfunction driven board for
compressor
P1
Driven board of
compressor works
abnormally
P3
Reset protection for the
driven module of
compressor
P4
Driven PFC protection of
compressor
P6
Driven IPM module
protection for compressor
P7
P9
Desynchronizing protection
for inverter compressor
PH
PL
Low voltage protection for
driven DC bus bar of
compressor
PE
Phase-losing of inverter
compressor
PJ
Failure start up for inverter
compressor
PP
AC current protection for
inverter compressor
U2
Capacity code of outdoor
unit/wrong setting of jumper
cap
U4
Insufficient refrigerant
protection
U6
Alarm due to abnormal
valve
U8
Malfunction of pipeline for
indoor unit
UC
Setting for indoor unit and
oudoor unit is succeeded
UL
C0
Communication malfunction
for indoor unit, outdoor unit
and wired controller of
indoor unit
C2
C4
Malfunction of indoor
unit-lacking
C5
Alarming due to
engineering series
number shock of indoor
unit
C8
Emergency status of
compressor
C9
Emergency status of fan
CH
High rated capacity
CC
No malfunction of main
65
Malfunction of driven
temperature sensor for
compressor
High voltage protection
for driven DC bus bar of
compressor
Wrong code-dialing
during emergency
operation
Driven communication
malfunction between
main board and inverter
compressor
DC Inverter Multi VRF System II Service Manual
Display
code
Content
Display
code
Content
Display
code
CF
Malfunction of main control
unit
CJ
Address shock of syste
Cb
Distribution overflow of Ip
address
A0
Debugging for unit
A2
Refrigerant recovery
A3
Defrosting
Content
module
CL
CU
A1
control unit
Low rated capacity
Communication
malfunction
between indoor unit
receiving lamp
board
Operational
parameter inquiry of
compressor
A4
Oil return
A5
On-line test
A6
Heat pump function
setting
A7
Quit mode setting
A8
Vacuum pump
mode
A9
IPLV test
AH
Heating
AL
Charge refrigerant
automatically
AF
Fan blow
AJ
Cleaning alarm for filter
AU
Long-distance emergency
stop
Ab
Emergency stop
n0
SE setting for the operation
n1
Defrosting period K 1
setting
n4
Limit setting for the
maximum ouput capacity
n6
Engineering series
number inqury for indoor
unit
n8
Parameters inquiry
nA
Heat pump unit
nC
Cooling only model
nE
Negative code
AA
AE
AP
Ad
EU AA class energy
efficiency test mode
Charge refrigerant
by hand
Startup debugging
confirmation of unit
Limit opereation
n7
Upper limit setting
for the collocation
matching ratio for
indoor unit and
outdoor unit
Malfunction inquiry
nH
Heating only model
nF
Fan model
n2
3 Troubleshooting
Troubleshooting principle
1) Communication malfunction
Communication
malfunction
NO
Energize indoor unit and
outdoor unit
Check whether indoor unit and
outdoor unit is power supplied
YES
Check whether the
communication wire between
indoor unit and outdoor unit is
correct
NO
Connect the communication
wire for indoor unit and
outdoor unit correctly
YES
NO
Measure whether the
communication wire is in
normal
Replace communication
wire
66
DC Inverter Multi VRF System II Service Manual
2) High pressure protection
High pressure
protection
NO
Measure whether
the pressure
switch is normal
Measure whether the high pressure
is too high with manometer
YES
YES
YES
Replace main
board of outdoor
unit
NO
Replace
pressure switch
Charge refrigerant according to the volume on
nameplate; check whether there is leakage for the
system
Check whether the refrigerantcharging volume is superfluous
YES
NO
Open the valve
completely
Check whether gas valve and liquid
valve are open completely
YES
NO
Cover the panel of
outdoor unit well
Check whether the panel of
outdoor unit is covered and sealed
well
YES
NO
E liminate obstacles
and sundries
Check whether the air can blow
smoothly at the heat exchanger of
indoor unit and outdoor unit
YES
NO
Measure the
circumstances of fan
motor and signal input
Check whether the indoor fan and
outdoor fan can operate
YES
NO
Measure the
circumstances of swing
motor and signal input
Check whether the indoor swing
blade is open completely
YES
NO
Engage valve and
coil
Check whether the electronic expansive value for
indoor unit and outdoor unit can operate normally
YES
NO
Blockage for
system pipeline
Mainly check the air inlet and air outlet connecting
indoor unit and main pipe, and the expansive valve
for indoor unit and outdoor unit. Replace electronic
expansion valve, dry strainer,ect.
67
DC Inverter Multi VRF System II Service Manual
3) Low-pressure protection
Low pressure
protection
NO
Measure whether the low pressure
is too low with manometer
Measure
whether the
pressure switch
is normal
YES
Replace main
board of outdoor
unit
NO
Replace
pressure switch
yes
YES
Check whether the refrigerantcharging volume is insufficient
Charge refrigerant according to the volume
on nameplate; check whether there is
leakage for the system
NO
NO
Open the valve
completely
Check whether gas valve and liquid
valve are open completely
YES
Check whether the panel of
outdoor unit is covered and sealed
well
NO
Cover the panel
of outdoor unit
well
YES
NO
Eliminate obstacles and
sundries
Check whether the air can blow
smoothly at the heat exchanger of
indoor unit and outdoor unit
YES
NO
Check whether the indoor fan
and outdoor fan can operate
Measure the
circumstances of fan
motor and signal input
YES
NO
Check whether the indoor swing
blade is open completely
Measure the
circumstances of swing
motor and signal input
YES
NO
Engage valve and
coil
Check whether the electronic
expansive value for indoor unit and
outdoor unit can operate normally
YES
NO
Blockage for
system pipeline
Mainly check the air inlet and air outlet
connecting indoor unit and main pipe, and the
expansive valve for indoor unit and outdoor unit.
Replace electronic expansion valve, dry
strainer,ect.
68
DC Inverter Multi VRF System II Service Manual
4) Discharge temperature protection
Discharge temperature
protection
Check whether the discharge
temperature for compressor is
reached to 113℃
Measure whether the
resistance valve for
temperature sensor is
normal
NO
YES
Replace main board of
outdoor unit
NO
YES
Replace discharge
temperature sensor
YES
Charge refrigerant according to the volume on nameplate; check
whether there is leakage for the system
Check whether the refrigerantcharging volume is insufficient
NO
NO
Check whether the gas valve
and liquid valve are open
completely
Open the valve
completely
YES
NO
Check whether the panel of
outdoor unit is covered and
sealed well
Cover the panel for
outdoor unit well
YES
Check whether the air can blow
smoothly at the heat exchanger
of indoor unit and outdoor unit
NO
Eliminate obstacles and
sundries
YES
NO
Measure the circumstances
of fan motor and signal input
Check whether the indoor fan
and outdoor fan can operate
YES
NO
Check whether the indoor swing
blade is open completely
Measure the circumstances
of swing motor and signal
input
YES
NO
Check whether the electronic
expansion valve for indoor unit
and outdoor unit can operate
normally
Engage valve and coil
YES
NO
Blockage for system
pipeline
Mainly check the air inlet and air outlet connecting indoor
unit and main pipe, and the expansive valve for indoor unit
and outdoor unit. Replace electronic expansion valve, dry
strainer,ect.
69
DC Inverter Multi VRF System II Service Manual
5) Mafunction of temperature sensor
Malfunction of
temperature
sensor
NO
Whether the plug of temperature is
connected with the plug of main board
correctly
Conform whether the
plug is connected
correctly
YES
NO
Replace temperature
sensor
Measure whether resistance value of
temperature sensor is in the normal range
YES
Replace main
board
6) Malfunction of sensor
Malfunction of
sensor
NO
Check whether plug of sensor is
connected with socket correctly
Confirm whether the
plug is connected
correctly
YES
YES
Measure whether the output value (DC
voltage) for socket of main board of outdoor
unit is normal
Replace
pressure
sensor
NO
Replace main board
of outdoor unit
7) Unit and main board can’t be energized
Unit and main board can’t
be energized
NO
Measure whether voltage between pole L
and pole N of wiring board is 220V
Check whether it’s
the malfunction of
power supply for
wiring board
YES
NO
Replace filter
board
Check whether there’s power
supply for filter board
YES
Replace main board
of outdoor unit
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DC Inverter Multi VRF System II Service Manual
8) Failure start-up
Failure start-up for
consecutive 6
times
YES
NO
Work normally after
replacing main board?
Replace compressor and
liquid gas separator
Work normally
9) Reset protection for drive module of compressor, drive PFC protection for compressor, malfunction of
drive temperature sensor for compressor, circuit malfunction of drive current detection for compressor
Wired
controller
displays P0
LED3 dual-8 nixie
tube displays P3, P4,
P7 or PC
Replace main
board
Work normally
10) Drive IPM overtemperature protection for compressor
Wired
controller
displays P0
LED3 dual-8
nixie tube
displays P8
yes
Whether two IPM
module is tightened?
Replace main
board
no
Tighten
module
Work normally
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DC Inverter Multi VRF System II Service Manual
11) Desynchronizing protection for inverter compressor
Wired
controller
displays P0
LED3 dual-8
nixie tube
displays P9
Whether the
sequence of wire
for compressor is
correct?
no
Adjust the
sequence of wire
for compressor
yes
Connect the wires
of compressor
tightly
yes
Whether
the wiring terminal
for compressor is
loose?
no
yes
Replace the main
board. Work
normally?
no
Replace
compressor
Work normally
12) Failure startup for inverter compressor
Wired
controller
displays P0
LED3 dual-8
nixie tube
displays PJ
yes
Replace main
board. Work
normally?
no
Replace
compressor
Work normally
72
DC Inverter Multi VRF System II Service Manual
13) Loop malfunction of driven charging for compressor
Wired
controller
displays P0
LED3 dual-8
nixie tube
displays PF
yes
Check whether the
wires for PFC
induction is correct/
Replace main
board
no
Reinsert the
wires for PFC
Work normally
14) Malfunction of memory chip for inverter compressor
Wire controller
displays P0
LED3 dual-8 nixie
tube displays PA
Whether the
memory chip is
inserted inversely
yes
Adjust the memory
chip
no
Whether the
memory chip is
loose?
yes
Insert the memory
chip tightly
no
Replace main
board
Work normally
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DC Inverter Multi VRF System II Service Manual
15) Overcurrent protection for inverter compressor, IPM module protection, phase-lacking of inverter
compressor
Wired controller
displays P1
LED3 dual-8 nixie tube
displays P5、P6 or PE
no
Whether the
sequence of wire
for compressor is
correct?
Adjust the sequence of
wire for compressor
yes
yes
Whether the
wiring terminal of
compressor is
loose?
Connect the wires of
compressor tightly
no
yes
Replace main
board. Work
normally?
no
Replace
compressor
Work normally
16) High pressure protection for driven DC bus bar of compressor, low pressure protection for driven DC
bus bar of compressor
Wired controller
displays P2
LED3 nixie tube
displays PH or PL
yes
Replace main
board. Work
normally?
Whether the power
voltage is
185V~264V?
no
yes
no
Replace compressor
Work normally
74
Close Upon power off
and ask authorized
personnel
DC Inverter Multi VRF System II Service Manual
17) AC current protection for inverter compressor
Wired
controller
displays E0
LED3 dual-8
nixie tube
displays PP
Replace main
board
Work normally
18) Communication malfunction between main contoller and driver of inverter compressor
Wired controlled
displays C2
LED3 dual-8 nixie
tube displays C2
yes
no
Check whether the
main control CPU
board is inserted
well?
Replace main
board
Insert the CPU
board well
Work normally
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DC Inverter Multi VRF System II Service Manual
4 Power Distribution of Unit
4.1 Power distribution of unit
The control logical relationship among parts inside the electric box of unit is showed by the mongline
diagram (CAD source file).
The main loop is showed by bold line (line width: 1mm); the control loop is showed by slim line (line width:
0.2mm).
Power wiring
board
Filter plate
Drive board
Compressor
Main control board
4-way valve, by-pass valve,
electric heating belt and
control signal
Fan
Temperature sensor, electric
expansion valve, high pressure and
low pressure switch and so on
(Bold line is the power line and the slim line is the control line)
4.2 Main electric parts
Name
Photo
Function introduction
Filter plate
It main effect is to eliminate the interference of
power for protecting unit’s anti-interference
capability and prevent the interference to other
electric appliances.
IPM Module
There are three complemental IGBT tube
inside the IPM module. They are controlled by
PWM wave and then bring the pressure of DC
bus bar to different stator windings of
compressor at different stage, and then
generate current on the stator. Meanwhile,
magnetic field will be generated on the stator
winding, and push the operation of rotor and
then drive compressor to operate.
PFC module
Four diodes and two MOS pipe are intergrated
inside the PFC module. It will transform AC
input power into DC power. Meanwhile, MOS
pipe is controlled by PWM wave. Pressure will
be increased by induction.
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DC Inverter Multi VRF System II Service Manual
4.3 Circuit diagram
Circuit diagram of outdoor unit
GMV-120WL/A-T, GMV-140WL/A-T, GMV-160WL/A-T
GMV-120WL/A-X, GMV-140WL/A-X, GMV-160WL/A-X
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DC Inverter Multi VRF System II Service Manual
GMV-H224WL/A-X
GMV-H280WL/A-X, GMV-H335WL/A-X
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DC Inverter Multi VRF System II Service Manual
5 Removal of Parts
5.1 Key parts
Photo
Name
Function
compressor
Core part of air conditioning system. It sucks low temperature and low pressure
gas, compress it to high temperature and high pressure gas, and then discharge
it.
Electronic
expansion valve
Throttling device. It transforms high pressure refrigerant liquid into low pressure
steam.
4-way valve
It changes the flow direction of refrigerant for switching between cooling and
heating.
Oil separator
It stays between discharge outlet of compressor and inlet of condenser. It used
for separating the lubricant oil of compressor when the high temperature and
high pressure refrigerant gas is discharged from the compressor.
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DC Inverter Multi VRF System II Service Manual
Photo
Name
Function
Vapour liquid
separator
It stays between outlet of evaporator and suction ouitlet of compressor. It used
for separating low temperature and low pressure refrigerant.
High pressure
liquid storage
tank
It used for storing the superfluous high pressure refrigerant liquid during cooling
process.
Solenoid valve
Cut-off valve
It used for connecting indoor unit and outdoor unit, and used for maintenance
and installation.
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DC Inverter Multi VRF System II Service Manual
5.2 Removal of key parts
5.2.1 GMV-120WL/A-T, GMV-140WL/A-T, GMV-160WL/A-T ,
GMV-120WL/A-X, GMV-140WL/A-X,GMV-160WL/A-X, GMV-H224WL/A-X,
GMV-H280WL/A-X, GMV-H335WL/A-X series unit
Removal operation for panel
Remark: Before removing the panel, please make sure that the unit is disconected with the power
Process
Photo
Operation Instruction
1)Remove top
cover
● Loose the screws fixing the top
cover with screwdriver
● Hold the top cover upwards
and then put it on the floor flatly
2)Remove front
side plate
sub-assy
● Loose the screw fixing the front
side plate with screwdriver
● Hold the front side plate
upwards and then put it on the
floor flatly
3)Remove front
panel and grille
● Loose the screws fixing the front
panel and grille with screwdriver
● Put the front panel and grille on
the floor flatly
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DC Inverter Multi VRF System II Service Manual
Removal operation for panel
Remark: Before removing the panel, please make sure that the unit is disconected with the power
Process
Photo
Operation Instruction
● Loose screws fixing left side
plate and rear side plate with
screwdriver
● remove the rear side plate
4)Remove left
side plate and
rear side plate
Removal operation for blade
Remark: Before removing the motor, please make sure that the unit is disconnected with the power.
Process
Photo
Operation Instruction
● Loose screws fixing
the panel with
screwdriver
● Then remove the
grille
1) Remove grille
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DC Inverter Multi VRF System II Service Manual
Removal operation for blade
Remark: Before removing the motor, please make sure that the unit is disconnected with the power.
Process
Photo
Operation Instruction
2) Remove
blade
● Loosen nuts fixing
the blade with wrench
● Then remove the
blade and put it on the
floor flatly
3) Remove
motor
● Loose screws fixing
the motor with
screwdriver
● then remove the
power cord of motor
● Take out the
damaged motor
4)Install motor
● Replace the motor,
tighten screws with
screwdriver and then
connect teh power
cord of motor
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DC Inverter Multi VRF System II Service Manual
Removal operation for blade
Remark: Before removing the motor, please make sure that the unit is disconnected with the power.
Process
Photo
Operation Instruction
● Assemble the unit in
the the converse
sequence
5) Assemble unit
Removal operation of compressor
Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power
is disconnected.
Process
Photo
Operation Instruction
● Loose screws fiixng
the compressor with
screwdriver
● Then pull out the
power cord
1) Remove wiring
cover of
compressor
Note: When removing
the power cord, make
marks for different
color power cords and
corresponding wiring
terminals for wrong
terminal.
● Weld suction pipe
and discharge pipe of
compressor
● then pull out the
connection pipe from
the compressor
Note: During welding
process, do not let the
flame burn out other
parts.
2)Disconnect
compressor and
connected pipeline
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DC Inverter Multi VRF System II Service Manual
Removal operation of compressor
Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power
is disconnected.
Process
Photo
Operation Instruction
3) Loose nuts
fixing the foot of
compressor
Twist off the nuts for
compressor with
wrench
4)Remove the
chassis from
compressor
● Take out the
compressor and
replace it
Note: When replacing
the compressor, do
not damage nearby
pipelines and other
parts
5)Fix the new
compressor at the
chassis
After replacing the
compresor, fix the
nuts at the bottom of
compressor
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DC Inverter Multi VRF System II Service Manual
Removal operation of compressor
Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power
is disconnected.
Process
Photo
Operation Instruction
6) Connect suction
pipe and discharge
pipe of copressor
and pipeline of
system again
Weld the connection
pipe of compressor,
connect the pipeline
and compressor
Note: During welding
process, do not let
flame burn out other
parts
7) Connect the
power cord of
compressor well
● Loose screws fixing
the power cord with
screwdriver
● conenct the power
cord well again
Note: When
connecting the power
cord, make marks for
different color power
cords and
corresponding wiring
terminals.
●Check whether the
pipeline is connected
well
●Check whetehr all
parts and connection
wires are connected
well
●If there’s no problem
after checking, install
front and rear cover
plates.
8) Check and open
the upper cover
plate
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DC Inverter Multi VRF System II Service Manual
Removal operation for 4-way valve
Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and
then power is disconnected.
Process
Photo
Operation Instruction
1)Disconnect
the coil of 4-way
valve from the
4-way valve
●Remove the coil of
4-way valve at first
2)Disconnect
the 4-way valve
and connection
pipeline
● Weld those 4
connection spots on
4-way valve, and then
pull out the
connection pipe
Note: During welding
process, do not let the
flae burn out other
parts
3) Replace
4-way valve
● Replace 4-way
valve
Note: During welding
process, do not let the
flame burn out other
parts
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DC Inverter Multi VRF System II Service Manual
Removal operation for 4-way valve
Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and
then power is disconnected.
Process
Photo
Operation Instruction
● Weld the
connection position
between 4-way valve
and pipeline
Note: During welding
process, do not let
flame burn out other
parts
4)Replace
4-way valve
Remival operation for eletronic expansion valve
Remark: Before removing the electronic expansion valve, please make sure that there’s no refrigerant in th pipeline of
system and the power is disconnected
Process
Photo
Operation Instruction
1)Disconnec the
electronic
expansion valve
from the pipeline
● Remove the coil of
electroc expansion
valve at first
● Weld the
connection pipe for
expansion valve, and
then pull out the
connection pipe
Note: During welding
process, do not let
flame burn out other
parts
2)Take out the
electronic
expansion valve
and replace it
●Take out the
electronic expansion
valve and replace it
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DC Inverter Multi VRF System II Service Manual
Remival operation for eletronic expansion valve
Remark: Before removing the electronic expansion valve, please make sure that there’s no refrigerant in th pipeline of
system and the power is disconnected
Process
Photo
Operation Instruction
● Weld the
connection pipe of
electronic expansion
valve
● Inistall the coil of
electronic expansion
valve
3) Replace
electronic
expansion valve
Note; During welding
process, do not let the
flame burn out other
parts
Removal operation of gas liquid separator
Remark: Before removing the gas liquid separator, please make sure that there’s no refrigerant inside the pipeline of
system and disconnect the power
Process
Photo
Operation Instruction
1)Disconnect
inlet pipe and
exit pipe of gas
liquid separator
● Weld those two
connection spots on
the gas liquid
separator and then
pull out the
connection pipe
Note: During welding
process, do not let
flame burn out other
parts
2) Replace gas
liquid separator
● Loose 4 screws with
screwdriver
● Replace gas lliquid
separator
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DC Inverter Multi VRF System II Service Manual
Removal operation of gas liquid separator
Remark: Before removing the gas liquid separator, please make sure that there’s no refrigerant inside the pipeline of
system and disconnect the power
Process
Photo
Operation Instruction
● Weld the pipe
connected with gas
liquid separator
● Fix the screws at
the base of gas liquid
separator well again
Note: During welding
process, do not let
flame burn out other
parts
3)Replace gas
liquid separator
Removal operation for plate heat exchanger
Remark: Before removing the plate heat exchanger, please make sure that there’s no refrigerant inside the pipeline of
system and disconnect the power
Process
Photo
Operation Instruction
●Twist off two nuts
fixing the plate heat
exchanger with
wrench
1)Twist off two
nuts fixing the
plate heat
exchanger with
wrench
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DC Inverter Multi VRF System II Service Manual
Removal operation for plate heat exchanger
Remark: Before removing the plate heat exchanger, please make sure that there’s no refrigerant inside the pipeline of
system and disconnect the power
Process
Photo
Operation Instruction
● Weld those 4
connection spots on
the plate heat
exchanger, and then
pull out the
connection pipe.
Note: During welding
process, do not let
flame burn out other
parts
2)Disconnect
inlet pipe and
outlet pipe of
plate heat
exchanger
●Replace plate heat
exchanger
3)Replace plate
heat exchanger
● Weld the pipe
connected with plate
heat exchanger
Note: During welding
process, do not let
flame burn out other
parts
4) Replace gas
liquid separator
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DC Inverter Multi VRF System II Service Manual
6 Common Maintenance
6.1 Vacuum drying for the system
6.1.1 Selection requirement for the vaccum pump
Do not use different vacuum pump for vaccum-pumping for different refrigerant system;
The final vacuum for the vacuum pump should reach -0.1Mpa;
The air discharge volume for the vacuum pump should reach 4L/S above;
The precision of vacuum pup should reach 0.02mmHg above;
The system vacuum pump for R410A must be with check valve.
6.1.2 Operation procedure and notices for Vacuum drying
1)Operation procedure
a.Before vacuum-pumping, please confirm that the cut-off valve for gas pipe and liquid pipe is at off
status;
b. Use charging conduct pipe to connect the governing value and vacuum heat pump to the detection
joint of gas valve and liquid valve;
c. After vacuum-pumping for 4h, check whether the vacuum degree is reached to -0.1MPa or above; If
not, there may be gas leakage. Please perform the leakage inspection again. If there’s no gas
leakage, please vacuum pump for another 2h.
d. If the required vaccum degree can’t be satisfied after vacuum-pumping for two times, there are water
inside the pipeline. Please drain out the water by the method of vaccum damage. The detailed
method: charge 0.05MPa nitrogen into the pipeline, vacuum pump for 2h and then keep the cacuum
for 1h. If -0.1 MPa vaccum degree still can’t be reached, repeat this operation unitl the water is
drained out completely.
2)After the vacuum pump is finished, turn off the valve of governing valve and stop vacuum pump and
keep it for 1h. Please confirm that the pressure of governing valve hasn’t been increased.
a.Vacuum pump for the gas pipe and liquid valve at the same time;
b.When turn off the vacuum pump to stop vacuum-pumping, please turn off the valve at first and then
de-energize the vacuum pump;
c. Keep the vacuum pump for 2h and confirm that the pressure of vacuum meter hasn’t been increased.
6.2 Fill and charge refrigerant
6.2.1 Filling procedure of regrigerant
a. Calculate the additional volume of refrigerant (GMV-120WL/A-T 、GMV-140WL/A-T、 GMV-160WL/A-T、
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DC Inverter Multi VRF System II Service Manual
GMV-120WL/A-X 、GMV-140WL/A-X、 GMV-160WL/A-X)
(1) Refrigerant quantity of outdoor unit before delivery:
Model
GMV-120WL/A
-T
GMV-140WL/A
-T
GMV-160WL/A
-T
GMV-120WL/A
-X
GMV-140WL/A
-X
GMV-160WL/A
-X
Refrigera
nt Qty
(kg)
5.0
5.0
5.0
5.0
5.0
5.0
Note:
①The refrigerant amount charged before delivery doesn’t include the amount that needs to be added
to indoor units and the connection pipeline.
②Length of connection pipe is decided on site. Therefore the amount of additional refrigerant shall be
decided on site according to the dimension and length of field-installed liquid pipe.
③Record the amount of additional refrigerant for convenience of after-sales service.
(2) Calculation of the amount of additional refrigerant
Calculation method of the quantity of additional refrigerant (based on liquid pipe)
Quantity of additional refrigerant = ∑length of liquid pipe X quantity of additional refrigerant per meter
Ф22.2
0.35
Quantity of additional refrigerant per meter for liquid pipe(kg/m)
Ф19.05
Ф15.9
Ф12.7
Ф9.52
0.25
0.17
0.11
0.054
Ф6.35
0.022
Note: Liquid pipe that is within 20m doesn’t need to be added with refrigerant.
First confirm that there is no leakage from the system. When compressor is not working, charge
additional R410a with specific amount to the unit through the filling opening of the liquid pipe valve
of the outdoor unit. If required amount cannot be quickly filled due to pressure increase of the pipe,
then set the unit in cooling startup and fill refrigerant from the low pressure check valve of the
outdoor unit.
(3) Calculation example
IDU
No.
Model
IDU ①
Duct type
GMV-ND72PL/B-T
IDU ②
Duct type
GMV-ND50PL/B-T
93
IDU ③
Duct type
GMV-ND36PL/B-T
IDU ④
Duct type
GMV-ND25PL/B-T
DC Inverter Multi VRF System II Service Manual
Liquid pipe:
No.
Pipe size
Length
No.
Pipe size
Length
A
Ф9.52
10m
a
Ф9.52
3m
B
Ф9.52
5m
b
Ф6.35
3m
C
Ф9.52
5m
c
Ф6.35
2m
D
Ф6.35
5m
d
Ф6.35
1m
Total length of each liquid pipe
Ф9.52:A+B+C+a=10+5+5+3=23m
Ф6.35: D+b+c+d=5+3+2+1=11m
Note: Liquid pipe that is within 20m doesn’t need to be added with refrigerant.
Therefore, the minimum quantity of additional refrigerant = (23-20)×0.054+11×0.022=0.404kg
b. Calculate the additional volume of refrigerant (GMV-H224WL/A-X、GMV-H280WL/A-X、GMV-H335WL/A-X、
GMV-224WL/B-X、GMV-280WL/B-X、GMV-335WL/B-X)
(1) Refrigerant quantity of outdoor unit before delivery:
Model
Refrigerant Qty (kg)
GMV-H224WL/A-X
5.5
GMV-H280WL/A-X
7.1
GMV-H335WL/A-X
8.0
Note:
①The refrigerant amount charged before delivery doesn’t include the amount that needs to be added
to indoor units and the connection pipeline.
②Length of connection pipe is decided on site. Therefore the amount of additional refrigerant shall be
decided on site according to the dimension and length of field-installed liquid pipe.
③Record the amount of additional refrigerant for convenience of after-sales service.
(2) Calculation of the amount of additional refrigerant
Calculation method of the quantity of additional refrigerant (based on liquid pipe)
Quantity of additional refrigerant = ∑length of liquid pipe X quantity of additional refrigerant per meter
Ф22.2
0.35
Quantity of additional refrigerant per meter for liquid pipe(kg/m)
Ф19.05
Ф15.9
Ф12.7
Ф9.52
0.25
0.17
0.11
0.054
Ф6.35
0.022
Note:First confirm that there is no leakage from the system. When compressor is not working, charge
additional R410a with specific amount to the unit through the filling opening of the liquid pipe valve
of the outdoor unit. If required amount cannot be quickly filled due to pressure increase of the pipe,
then set the unit in cooling startup and fill refrigerant from the low pressure check valve of the
outdoor unit.
(3) Calculation example
IDU
No.
Model
IDU ①
Duct type
GMV-ND72PL/B-T
IDU ②
Duct type
GMV-ND50PL/B-T
94
IDU ③
Duct type
GMV-ND36PL/B-T
IDU ④
Duct type
GMV-ND25PL/B-T
DC Inverter Multi VRF System II Service Manual
Liquid pipe:
No.
Pipe size
Length
No.
Pipe size
Length
A
Ф9.52
10m
a
Ф9.52
3m
B
Ф9.52
5m
b
Ф6.35
3m
C
Ф9.52
5m
c
Ф6.35
2m
D
Ф6.35
5m
d
Ф6.35
1m
Total length of each liquid pipe
Ф9.52:A+B+C+a=10+5+5+3=23m
Ф6.35: D+b+c+d=5+3+2+1=11m
The minimum quantity of additional refrigerant = 23×0.054+11×0.022=1.484kg
6.3 Airtightness test
6.3.1 Importance of airtightness test
The airtightness of VRF system is the leak tightness of the pipeline for refrigerant, which the
guarantee for safe and reliable operation. The leakage of refrigerant may affect the operation of air
conditioner seriously, or even damage compressor and then lead to breakdown of system. Therefore, it
needs to perform the airtightness test. If the there’s gas leakage after the system is installed completely,
because the indoor ceiling decoration are all finished, it’s will be very difficult to find out the leakage point.
Thus, the airtightness test of the system must be finished before finishing indoor decoration.
6.3.2 Operation procedure for the airtightness test
Before ex-factory, cut-off valve for gas pipe and liquid pipe of outdoor unit is turned off. Please
confirm that before operation.
Before testm please smear a little corresponding lubricant oil at and pipe terminal, and use two
wrenches for fixing
Do not allow to connect the pipeline of outdoor unit for test during airtightness test.
The system test pressure for R410A is 4.15MPa (3.0MPa for R22 refrigerant system). Nitrogen
must be used as the medium for the airtightness test and the nitrogen should be dry. Increase pressure
slowly for three steps:
Step 1: Increase pressure slowly to 0.5MPa, stop for 5min and then check the gas leakage. Big
leakage may be found out;
Step 2: Increase pressure slowly to 1.5MPa, stop for 5min to check the airtightness. Small leakage
may be found out;
Step 3; Increase pressure slowly to 4.15MPa for R410A slowly (3.0MPa for R22 refrigerant
system), stop for 5min and perform the strength test. Minor leakage or sand hole may be found. Increase
pressure to test pressurem, keep it for 24h and observe whether the pressure is decreasing. If not, the
pressure is qualified.
6.3.3 Cautions
a. The test manometer range for R410A should be 4.5MPa above (3.5MPa above for R22
refrigerant system);
b. Record the data on manometerk, ambient temperature and test time at the same time;
c. Pressure modification: when temperature changes 1℃, the temperature will change 0.01MPa
correspondingly.
d. Pressure should be kept the same.
e. If it needs to keep pressure for a long time, decrease the pressire lower than 0.55MPa pr below.
Long-time high pressure can lead to leakage at the welding position, which may cause riskl.
f. Before the airtightness for the pipeline of refrigerant is finished, do not allow to insulate and
bundle the welding positions and connection position of bellmouth of indoor unit.
Add pressure from gas pipe and liquid pipeat the same time
Note: Before airtightness test, all welding lines can’t be insulated and bundled.
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DC Inverter Multi VRF System II Service Manual
7 Exploded View of Unit and Parts’ List
7.1 Exploed view for outdoor unit and parts’ list
1) Model: GMV-120WL/A-T、GMV-140WL/A-T、GMV-160WL/A-T
Exploded view
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DC Inverter Multi VRF System II Service Manual
Parts list
GMV-120WL/A-T,GMV-140WL/A-T,GMV-160WL/A-T
NO.
1
2
Name of Part
Coping
Inductance
Assy
Product Code
CN850W0180 /CN850W0170/CN850W0160
Part Code
Quantity
01264100008P
1
01394100050
1
3
Inductance
43120122
1
4
Electric Box Assy
01394100124
1
5
Main Board
30228000005
1
6
Radiator
49018000013
1
7
Filter Board
30228000006
1
8
Main Board
30226000045
1
9
Terminal Board
42018000026
1
10
Terminal Board
42011242
1
11
Left Side Plate
01314100013P
1
12
Clapboard Sub-Assy
01244100006
1
13
Fan Motor
15704115
1
14
Sensor Sub-Assy
39008000061G
1
15
Fan Motor
1570411501
1
16
Front Grill
26904100026
1
17
Cabinet
01514100002P
1
18
Front Side Plate
01314100012P
1
19
Handle
26235253
1
20
Front Connection Board
01344100002P
1
21
Diversion Circle
10474100001
1
22
Axial Flow Fan
10434100003
1
23
Chassis Sub-Assy
0119410000301P
1
24
Motor Support Assy
01804100293
1
25
Pressure Protect Switch
4602000902
1
26
Discharge Tube Sub-Assy
04534100057
1
27
Silencer
07444105
1
28
Oil Separator
07424105
1
29
Compressor
00204100001
1
30
Electrical Heater(Compressor)
765152128
1
31
Compressor Gasket
76710247
1
32
Cut off Valve
07330000002
1
33
Strainer
07212001
1
34
Gas-liquid Separator
07424100014
1
35
Capillary Sub-Assy
04004100013
1
36
Strainer
07415200002
1
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DC Inverter Multi VRF System II Service Manual
GMV-120WL/A-T,GMV-140WL/A-T,GMV-160WL/A-T
NO.
Name of Part
Product Code
CN850W0180 /CN850W0170/CN850W0160
Part Code
Quantity
37
Electromagnetic Valve
43000054
1
38
Magnet Coil
4304000417
1
39
Right Connection Board
01344100003P
1
40
Rear Side Plate Sub-Assy
01314100011P
1
41
Sensing Device
322101001
1
42
Sensor (High Pressure)
322101032
2
43
Gas By-pass Sub- Assy
04534100056
2
44
Magnet Coil
4304000406
1
45
Plate-type Heat Exchanger Assy
00904100013
1
46
Discharge Charge Valve
07133771
1
47
Electronic Expansion Valve
07334447
1
48
Electric Expand Valve Fitting
4304413205
1
49
Electronic Expansion Valve
07334390
1
50
Electric Expand Valve Fitting
4304413220
1
51
Low Pressure Survey Valve
Sub-Assy
07334100040
1
52
Cut off Valve
07130239
1
53
Strainer
07212121
1
54
Silencer
07245012
1
55
4-Way Valve Assy
04044100022
1
56
Cut off Valve
07330000001
1
57
Strainer
07210037
1
58
One way Valve
07130118
1
59
4-way Valve
43000338
1
60
Magnet Coil
4300040045
1
61
Nozzle for Adding Freon
06120012
1
62
Condenser Assy
01124100108
1
63
Rear Grill
01574100004
1
Above data is subject to change without notice, pls reference the SP in global service website.
98
DC Inverter Multi VRF System II Service Manual
2) Model: GMV-120WL/A-X、GMV-140WL/A-X、GMV-160WL/A-X
Exploded view
32
31 30 29 28 27 26
25
33
24
34
23
35
36
22
21
37
20
38
19
18
40
41
42
43
44
45
46
47
48
17
16
2
3
4
5
6
7
8
9 10 11 12 13 14 15
Parts list
GMV-120WL/A-X、GMV-140WL/A-X、GMV-160WL/A-X
NO.
Name of Part
Product Code
CN850W0260 / CN850W0250 / CN850W0240
Part Code
Quantity
1
Front Grill
26904100026
2
2
Cabinet
01514100005
1
3
Front Side Plate
01314100012P
1
4
Handle
26235253
2
5
Front Connection Board
01344100002P
1
6
Diversion Circle
10474100001
2
7
Axial Flow Fan
1
8
Fan Motor
1
9
Chassis Assy
1043410000301
15704100013
1570410001301
0119410000301P
10
ompressor and Fittings
00204100018
99
2
1
DC Inverter Multi VRF System II Service Manual
GMV-120WL/A-X、GMV-140WL/A-X、GMV-160WL/A-X
NO.
Name of Part
Product Code
CN850W0260 / CN850W0250 / CN850W0240
Part Code
Quantity
11
Gas-liquid Separator
07424100014
1
12
Plate-type Heat Exchanger Assy
00904100013
1
13
Supporter
01804100312
1
14
Rear Side Plate Sub-Assy
01314100011P
1
15
Right Connection Board
01344100003P
1
16
Current Divider
04414153
1
17
Strainer
07212121
1
18
Silencer
07245012
1
19
Condenser Sub-Assy
01154100008
1
20
Atmolysis Pipe Sub-Assy
04534100062
1
21
Cut off Valve
07330000001
1
22
Strainer
07212121
1
23
4-way Valve
43000338
1
24
Nozzle for Adding Freon
06120012
1
25
Rear Grill
01574100004
1
26
Strainer
07212121
1
27
Cut off Valve
07130239
1
28 Low Pressure Survey Valve Sub-Assy
07334100067
1
29
Inhalation Tube Sub-assy
04574100107
1
30
Strainer
07212121
1
31
Electromagnetic Valve
43000054
1
32
Discharge Tube Sub-Assy
04534100092
1
33
Coping
01264100008P
1
34
Reactor
43130192
1
35
Main Board
30226000046
1
36
Filter Board
30223000044
1
37
Electric Box Assy
26905200088
1
38
Radiator
49018000087
1
39
Terminal Board
42011221
1
40
Terminal Board
42018000026
1
41
Left Side Plate
01314100013P
1
42
Motor Support Sub-Assy
01805200244
1
43
Sensor (High Pressure)
322101032
1
44
Sensing Device
322101002
1
45
Sensor Sub-Assy
39008000061G
1
46
Magnet Coil
4304000417
1
47
Magnet Coil
4304000417
1
48
Magnet Coil
4304000417
1
Above data is subject to change without notice, pls reference the SP in global service website.
100
DC Inverter Multi VRF System II Service Manual
3) Model: GMV-H224WL/A-X
Exploded view
Parts list
GMV-H224WL/A-X
NO.
Name of Part
Product Code
CN850W0330
Part Code
Quantity
1
Coping
01264100047P
1
2
Electric Box Assy
1
3
Radiator
01394100349
49018000083
4
2
Rectifier
46010604
1
5
Reactor
4313017401
1
6
Main Board
30223000045
1
7
Phase Reverse Protector
32218018
1
8
Filter Board
30228000015
1
9
Main Board
30226000045
1
10
Terminal Board
42011043
4
11
Terminal Board
42018000026
1
12
Left Side Plate
01314100084P
1
13
Fan Motor
1570280206
2
14
Axial Flow Fan
10434100006
2
15
Sensor Sub-assy
39008000061G
1
16
Front Grill
01574100008
2
101
DC Inverter Multi VRF System II Service Manual
GMV-H224WL/A-X
NO.
Name of Part
Product Code
CN850W0330
Part Code
Quantity
17
Diversion Circle
10474100003
2
18
Cabinet Assy
01514100015
1
19
Handle
26235253
1
20
Front Side Plate
01314100082P
1
21
Nozzle for Adding Freon
06120012
1
22
Gas-liquid Separator
07424140
1
23
Pressure Protect Switch
4602000902
1
24
Cut off Valve
07334100011
1
25
Compressor and Fittings
00204100013
1
26
Electrical Heater(Compressor)
765152128
1
27
Oil Separator Sub-Assy
07424100045
1
28
Oil Separator
07424105
1
29
One way Valve
07130118
1
30
Strainer
07415200002
1
31
Capillary Sub-assy
04004100020
1
32
Electromagnetic Valve
43000054
1
33
Magnet Coil
4304000417
1
34
Electric Expansion Valve Sub-Assy
43044100160
1
35
One Way Valve
07133618
1
36
Electronic Expansion Valve
43044100173
1
37
Electric Expand Valve Fitting
4304413219
1
38
Sensor (High Pressure)
322101032
1
39
Sensing Device
322101002
1
40
Drainage Joint
26113009
1
41
Plate-type Heat Exchanger Assy
00904100025
1
42
Strainer
07212001
1
43
Electronic Expansion Valve
3044100172
1
44
Electric Expand Valve Fitting
4304413220
1
45
4-Way Valve Sub-Assy
04044100059
1
46
Gas By-pass sub- assy
04534100101
1
47
Magnet Coil
4304000416
1
48
Strainer
07212403
1
49
Condenser Assy
01124100138
1
50
Rear Grill
01574100011
1
51
Discharge Charge Valve
07133771
1
52
Discharge Charge Valve Sub-Assy
07334100062
1
53
4-Way Valve
43044100164
1
54
Magnet Coil
4300040032
1
55
Cut off Valve
07130239
1
56
Cut off Valve
07334100054
1
Above data is subject to change without notice, pls reference the SP in global service website.
102
DC Inverter Multi VRF System II Service Manual
4) Model: GMV-H280WL/A-X
Exploded view
Parts list
GMV-H280WL/A-X
NO.
Name of Part
Product Code
CN850W0340
Part Code
Quantity
1
Coping
01264100052P
1
2
Electric Box Assy
01394100496
1
3
Radiator
49018000083
4
Reactor
4313017401
5
Main Board
30223000072
6
Rectifier
46010604
7
Phase Reverse Protector
32214101
8
Filter Board
30223000025
9
Main Board
30226000066
10
Terminal Board
42011043
11
Terminal Board
42018000026
12
Brushless DC Motor
15704100010
2
13
Left Side Plate
01314100090P
1
14
Axial Flow Fan
10434100008
2
15
Sensor Sub-Assy
39008000121G
1
16
Front Side Plate
01314100091P
1
103
DC Inverter Multi VRF System II Service Manual
GMV-H280WL/A-X
NO.
Name of Part
Product Code
CN850W0340
Part Code
Quantity
17
Front Grill
01574100008
2
18
Diversion Circle
10474100003
2
19
Handle
26235253
2
20
Chassis Assy
01194100112
1
21
Oil Separator
07424100050
1
22
Cut off Valve
07130208
1
23
Cut off Valve
07334100011
1
24
Compressor Gasket
76715019
4
25
Cut off Valve
07334100012
1
26
Compressor and Fittings
00204100023
1
27
Electric Heater(Compressor)
7651540714
1
28
Gas-liquid Separator
07424100048
1
29
Pressure Protect Switch
4602000902
1
30
Bidirection Strainer
07220016
1
31
Strainer
07415200002
1
32
Discharge Charge Valve Sub-Assy
07334100066
1
33
Discharge Charge Valve
07133771
1
34
Plate-type Heat Exchanger Assy
00904100029
1
35
Electronic Expansion Valve
43044100172
1
36
Electric Expand Valve Fitting
4304413204
1
37
Rear Side Plate
01314100092P
1
38
Inhalation tube Assy
04574100168
1
39
Electromagnetic Valve
43003091
1
40
Magnet Coil
4304000413
1
41
Electric Expansion Valve Sub-Assy
43044100237
1
42
Electronic Expansion Valve
43044100173
1
43
Electric Expand Valve Fitting
4304413205
1
44
4-Way Valve Assy
04044100081
1
45
Strainer
07414100026
1
46
4-way Valve
43000339
1
47
Strainer
07212121
1
48
Magnet Coil
4300040032
1
49
One way Valve
07335210
1
50
Nozzle for Adding Freon
06120012
1
51
Condenser Assy
01124100160
1
52
Rear Grill
01574100014
2
53
Gas By-pass sub- assy
04534100108
1
54
Magnet Coil
4304000416
1
55
Electromagnetic Valve
43000054
1
56
Sensor (High Pressure)
322101032
1
57
Sensor
322101002
1
58
One way Valve
04324001
1
Above data is subject to change without notice, pls reference the SP in global service website.
104
DC Inverter Multi VRF System II Service Manual
5) Model: GMV-H335WL/A-X
Exploded view
Parts list
GMV-H335WL/A-X
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Name of Part
Coping
Electric Box Assy
Radiator
Reactor
Rectifier
Main Board
Phase Reverse Protector
Filter Board
Main Board
Terminal Board
Terminal Board
Left Side Plate
Gas-liquid Separator
Brushless DC Motor
Axial Flow Fan
Front Grill
Cabinet
Diversion Circle
105
Product Code
CN850W0350
Part Code
Quantity
01264100052P
01394100496
49018000083
4313017401
46010604
30223000072
32214101
30223000025
30226000066
42011043
42018000026
01314100090P
07424100048
15704100010
10434100008
01574100008
01514100016P
10474100003
1
1
2
1
1
1
1
1
1
1
1
1
1
2
2
2
1
2
DC Inverter Multi VRF System II Service Manual
GMV-H335WL/A-X
NO.
Name of Part
Product Code
CN850W0350
Part Code
Quantity
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
Front Side Plate
Sensor Sub-assy
Chassis Sub-assy
Oil Separator
Low Pressure Survey Valve Sub-assy
Strainer
Cut off Valve
Compressor and Fittings
Electric Heater(Compressor)
Cut off Valve
Connecting Pipe Sub-assy(Big Vavle)
Nozzle for Adding Freon
Pressure Protect Switch
Connection Pipe Sub-assy
Cut off Valve
Strainer
Capillary Sub-assy
Electromagnetic Valve
Magnet Coil
Rear Side Plate
Handle
Sensor (High Pressure)
Sensing Device
Plate-type Heat Exchanger
Electronic Expansion Valve
Electric Expand Valve Fitting
Plate-type Heat Exchanger Assy
4-Way Valve Assy
Strainer
4-way Valve
One way Valve
Magnet Coil
Discharge Charge Valve Sub-Assy
Discharge Charge Valve
Condenser Assy
Filter
One way Valve
Electronic Expansion Valve
Electric Expand Valve Fitting
Rear Grill
Electric Expansion Valve Sub-Assy
Magnet Coil
Electromagnetic Valve
01314100091P
39008000121G
01194100081P
07424100050
07334100065
07414100024
07130208
00204100015
7651540714
07334100014
05024100925
06120012
4602000902
05024100948
07334100013
07210032
04004100022
43003091
4304000413
01314100092P
26235253
322101032
322101002
00904100004
43044100172
4304413204
00904100029
04044100061
07414100024
43000339
07335210
4300040032
07334100066
07133771
01124100151
0341010701
04324001
43044100190
4304413205
01574100014
43044100211
4304000416
43000054
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
62
Gas By-pass sub- assy
04534100108
1
Above data is subject to change without notice, pls reference the SP in global service website.
106
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