Gree GMV-120WL/A-T User manual

DC INVERTER MULTI VRF SYSTEM II
SERVICE MANUAL
R410A(GC201407-Π)

PRODUCT .....................................................................................................2
1 PRODUCT LIST ..............................................................................................................................2
2 NOMENCLATURE ............................................................................................................................2
3 PRODUCT FEATURES.....................................................................................................................2
4 SPECIFICATIONS.............................................................................................................................3
5 PRODUCT CAPACITY CORRECTION.............................................................................................4
6 PRINCIPAL OF OPERATION............................................................................................................ 5
CONTROL......................................................................................................7
1 Units’ Control.....................................................................................................................................7
2 Wired Controller ...............................................................................................................................7
3 Remote Controller ...........................................................................................................................12
4 Debugging Software........................................................................................................................14
INSTALLATION............................................................................................ 41
1.Engineering Installation Preparation and Notice .............................................................................41
3 Installation Materials Selection........................................................................................................42
4 Installation of outdoor unit ...............................................................................................................43
5 Installation of Outdoor Unit..............................................................................................................45
DEBUGGING & MAINTENANCE ...............................................................51
1 Debugging of Unit ...........................................................................................................................51
2 Malfunction List ..............................................................................................................................56
3 Troubleshooting ..............................................................................................................................59
Troubleshooting principle ..................................................................................................................59
4 Power Distribution of Unit...............................................................................................................68
5 Removal of Parts.............................................................................................................................70
6 Common Maintenance ...................................................................................................................78
7 Exploded View of Unit and Parts’ List .............................................................................................81
CONTENTS

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DC Inverter Multi VRF System II
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PRODUCT

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PRODUCT
1 PRODUCT LIST
Model Product
Code
Cooling Capacity Heating
Capacity Power Supply Refrigerant Appearance
kW kW
GMV-120WL/A-T CN850W0180 12.1 14
220-240V~50Hz
208-230V~60Hz R410aGMV-140WL/A-T CN850W0170 14 16.5
GMV-160WL/A-T CN850W0160 16 18.5
2 NOMENCLATURE
2.1Nomenclature of outdoor units
GMV □-□ □ □ □ W□/□ □ □
1 2 3 4 5 6 7 8 9 10 11
No. Description Options
1 Product code GMV-Gree Multi VRF Units
2 Suitable climate Blank-T1 condition; T2-low temperature climate;
T3-high temperature climate
3 Unit type DC Inverter (omit)
4 Function code Q—Heat Recovery; S—Water Heater; W—Water-cooled Unit; X—Fresh Air Unit
Leave blank if above functions are unavailable.
5 Code of cooling capacity Nominal capacity/100(W)
6 Code of outdoor unit ——
7 Unit structure M—Modular (top discharge); L—Non-modular (side discharge); blank—Non-modular (top
discharge)
8 Refrigerant R410a (omit)
9 Design No. Named in order of A, B, C, or combined with 1, 2, 3…
10 Power supply 7000~18000W, 1 phase—omit; 3 phase—S
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 efciency,
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 efciency
The 2nd generation of DC Inverter Multi VRF System adopts DC motor to realize complete direct current and upgrade the energy
efciency. EER is up to 3.97 and COP can reach 4.28.
(2) New generation CAN bus communication

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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 exibility.
(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: -5~48oC, heating: -20~27oC).
(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 uctuation 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.
4 SPECIFICATIONS
4.1 Specications
Model GMV-120WL/A-T GMV-140WL/A-T GMV-160WL/A-T
Product code CN850W0180 CN850W0170 CN850W0160
Cooling capacity kW 12.1 14 16
Heating capacity kW 14 16.5 18.5
Circulating air volume m3/h 6000 6300 6600
Noise dB(A) 55 56 58
Refrigerant charge
volume kg 5 5 5
Energy efciency level Level 1 1 1
Power supply 220-240V~50Hz
208-230V~60Hz
220-240V~50Hz
208-230V~60Hz
220-240V~50Hz
208-230V~60Hz
Rated power
input
Cooling kW 3.05 3.98 4.85
Heating kW 3.27 3.99 4.67
Unit Dimensions (mm)(WxDxH) 900×340×1345
Package Dimensions (mm)(WxDxH) 998×458×1515
Compressor QXAS-F428zX050A
Water-proof level IPX4 IPX4 IPX4
Suitable climite T1 T1 T1
Connection
pipe
Gas mm Ф15.9 Ф15.9 Ф19.05
Liquid mm Ф9.52 Ф9.52 Ф9.52
Connection Method Bell mouth connection Bell mouth connection Bell mouth connection
Net weight kg 110 110 110
Note:
① . Units conform to design standard: GB/T 18837-2002.
② . Specications 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: -5~48oC
Heating Outdoor temperature: -20~27oC

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5 PRODUCT CAPACITY CORRECTION
5.1 Correction factor of indoor and outdoor temperature
(1) Correction factor of cooling capacity
20
16
14 16 18 20 22 24 26
25
30
35
40
43
(2) Correction factor of heating capacity
-15 -10 -5 0 5 10 15 16
12
10
14
16
22
18
20
24
26
27
5.2 Correction factor of pipe length and height difference
(1) 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.
(2) Below table shows the capacity variance ratio for 100% full load in standard working condition (thermostat setting is 16℃ for cooling
and 30oC for heating).
Hm(m)
40
20
30
10
Hp(m)
20
10
10 20 30
30
40
50
6040 50 70 80 11090 1001 20 150
1.0
0.99 0.97 0.95
L(m)
1301 40
Hm(m)
40
20
30
10
Hp(m)
20
10
10 20 30
30
40
50
6040 50 70 80 11 090 1001 20 150 L(m)
1301 40
Variance ratio of heating capacity Variance ratio of heating capacity

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6 PRINCIPAL OF OPERATION
Components in owcharts are presented according to the following table:
Name Compressor 4-way valve Cut-off valve One-way valve Capillary tube
Symbol
Name Gas-liquid
separator
Pressure
switch
Pressure
sensor
Axial-ow nned heat
exchanger Electronic expansion valve
Symbol
Outdoor side
Indoor side Heating
Solenoid valve
Cooling
Solenoid valve
High pressure
sensor
Pressure regulator valve
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 ow 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 ows 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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1 Units’ Control
(1) Schematic diagram of units’ control
Wired controller,
remote controller
or remote monitor
Fan Compressor 4-way valve
Control
input
Control
output
Power supply
Digital
display tube
ODU control main board
８８
(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 Wired Controller
2.1 Control panel

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Fig. 1.1 Appearance of wired controller
Fig. 1.2 LCD graphics of wired controller
ّLCD Display Instruction
Table 1.1 LCD display instruction
No. Symbols Instructions
1 Up and down swing function
2 Left and right swing function
3
It's valid under Save mode and displays during setting process.
Temperature lower limit for Cooling: Limit the minimum temperature value under Cooling or Dry mode.
Temperature upper limit for Heating: Limit the maximum temperature value under Heating, Space Heating or 3D
Heating mode.
4Auto mode (Under Auto mode, the indoor units will automatically select their operating mode as per the temperature
change so as to make the ambient comfortable.)
5It shows the setting temperature value(In case the wired controller is controlling a Fresh Air Indoor Unit, then the
temperature zone will display FAP)
6 Cooling mode
7 Dry mode

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8 Fan mode
9 Heating mode
10 When inquiring or setting project number of indoor unit, it displays "NO." icon
11 Floor Heating mode (When Heating and Floor Heating simultaneously shows up, it indicates 3D Heating is
activated.)
12 Display "SET" icon under parameter setting interface
13 Space Heating mode
14 Display "CHECK" icon under parameter view interface
15 Outdoor unit operates under Save mode/upper limit of system capacitor less 100%/remote Save status
16 Sleep status
17 Current set fan speed (including auto, low speed, medium-low speed, medium speed, medium-high speed, high
speed and turbo seven status)
18 Air status
19 Remind to clean the lter
20 Quiet status (including Quiet and Auto Quiet two status)
21 Allow auxiliary electric heating On icon
22 Light On/Off function
23 X-fan function
24 Health function
25 Fresh air status
26 Out function
27 Outdoor unit defrosting status
28 Gate-control function
29 Shielding status
30 Child Lock status
31 One wired controller controls multiple indoor units
32 Save status of indoor unit
33 It indicates the current wired controller is the slave wired controller (address of wired controller is 02)
34 Memory status (The indoor unit resumes the original setting state after power failure and then power recovery)
35 Invalid operation
36 Current wired controller connects master indoor unit
37 Timer zone:Display system clock and timer status
Note: When wired controller is connected with different indoor units, some functions will be different

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ّButton Graphics
Fig. 1.3 Button graphics
2.2 Installation and removal
2.2.1 Installation dimensions
Unit:mm
112 22
5
3
82.5
40
112
42.5
R3.3
6-R2.7
22
Unit:mm
Fig.2.1.1 Dimension of wired controller
2.2.2 Installation method
10
1 2 3 4
67
8 9
H1H2
H1H2
H1H2
5
Fig. 2.2.2 Installation diagram for wired controller
Above is a simple installation method of wired controller. Please pay attention to the following:
1) Before installation, disconnect power of the indoor unit. Do not operate when power is connected.
2) 2-core twisted pair cable from the installation hole on the wall and lead it through the hole on the back plate of wired controller.
3) Place the wired controller on wall and secure its back plate on wall with screw M4X25.
4) Connect the 2-core twisted pair cable to terminal H1 and terminal H2. Tighten up the screws.
5) Stick the cable in the slot that is left of the terminals and buckle the wired controller’s panel with its back plate.
Note:
If caliber of the communication cord is too large, which causes difculty in leading or sticking the cord according to above point 2 and
point 5, strip some of the sheath of the communication cable to meet the installation requirement.

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2.2.3 Removal method
1 2 3 4
H1H2
H1H2
Fig.2.1.3 Removal of Wired Controller
2.2.4 Connection of communication cord
There are 4 ways to connect wired controller with indoor units’ network:
D1D2H1H2
D1 D2
Indoor unit
Outdoor unit
D1D2H1H2
D1 D2
Outdoor unit
Indoor unit
Fig. 2.2.4.1 One wired controller
controls one indoor unit
Fig. 2.2.4.2 Two wired controllers
control one indoor unit
D1D2 H1H2
D1 D2H1 H2
D1D2H1H2
D1 D2
Indoor unit 1 Indoor unit 2 Indoor unit 16
Outdoor unit
Fig. 2.2.4.3 One wired controller controls multiple indoor units simultaneously

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D1D2H1H2
D1D2H1H2
D1D2 H1H2
D1 D2
Indoor unit 1 Indoor unit 2 Indoor unit 16
Outdoor unit
Fig. 3.6 Two wired controllers control multiple indoor units simultaneously
3 Remote Controller
(1) Remote controller YAD1F
1) Button name and function introduction (outside)
No. Button name Function
1 ON/OFF Turn on or turn off the unit
2FAN Set fan speed
3▲/▼ Set temperature and time
4 COOL Set cooling function
5 HEAT Set heating function
6 SWING Set swing status
7 TURBO Set turbo function
2) Button name and function introduction (inside)
No. Button name Function
1 MODE Set operation mode
2 TIMER ON Set timer on function
3 TIMER OFF Set timer off function
4 LIGHT Set light function
5 I FEEL Set I FEEL function
6 X-FAN Set X-FAN function
7 TEMP Switch temperature displaying type on the unit’s display
8 HEALTH Set health function
9 CLOCK Set clock of the system
10 SLEEP Set sleep function

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(2) Remote controller YV1L1
No. Button name Function
1 ON/OFF Turn on or turn off the unit
2FAN Set fan speed
3▲/▼ Set temperature and time
4 MODE Set operation mode
5 Set quiet function
6 Set health function and air function
7 Set left&right swing status
8 Set up&down swing status
9 X-FAN Set X-FAN function
10 TIMER ON Set timer on function
11 TIMER OFF Set timer off function
12 SAVE Set energy-saving function
13 SLEEP Set sleep function
14 LIGHT Set light function
15 CLOCK Set clock of the system
16 I FEEL Set I FEEL function
17 TEMP Switch temperature displaying type on the unit’s display

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4 Debugging Software
4.1 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
efcient 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 efcient 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 difculty and cost of commissioning and maintenance, providing better and faster service to customers.
4.2 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 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.
4.3 Parts introduction
4.3.1 List of parts
Name Model Material no. Remark
Gree USB data converter MC40-00/B 30118027 Convert the air conditioning communication into computing
communication
Gree Commissioning Tool Kits
(CD-ROM) DG40-33/A(C) 36400000003 Include Gree debugger, monitoring software, USB driver and USB converter conguring software.
USB wire \ 40020082 Wire connecting computer’s USB interface and converter
Communicaiton board \ 30118015 This board can be used when units are far from the computer.
Board connection wire (1m) \ 4001023229 4-core wire connecting units and converter
Board connection wire (5.5m) \ 4001023214 4-core wire connecting units and converter
Instruction manual \ 64134100023 Instruction manual
4.3.2 Gree USB data converter
4.3.2.1 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.

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4.3.2.2 Appearance
4.3.2.3 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 ickering. When units are uploading data to the computer, the RX data receiving light will be ickering.
ّ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 available for Gree debugger and the monitoring software).

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ّ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.
4.3.2.4 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.
4.3.3 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.
4.3.4 Communication cord
4.3.4.1 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:
4.3.4.2 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:
4.4 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

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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 difculty 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.
4.4.1 Software installation
4.4.1.1 Installation requirements
(1) Computer Conguration
Memory 1 GB at least
2 GB or above is preferred
Hard Disc 10 GB available
CPU
Core 2 or higher
1 GHz at least
2 GHz or above is preferred
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 le “Launcher.exe”.
For the rst 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.

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4.4.1.2 Installation owchart
This owchart describes basically the software installation process. See below for details.
4.4.1.3 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”.