Gree ME20-24/D1(T) User manual

Owner's Manual
Original Instructions
Intelligent Controller
Model:
ME20-24/D1(T)

To Users
Thank you for selecting Gree product. Before installing the product, please
read this instruction manual carefully to know well about the product and use it
correctly. In order to install and use the product correctly to reach the expected
operational effect, the following instructions are hereby issued:
(1)The appliance is not intended to be used by the people with physical,
sensory or mental handicap or the people without using experience and knowledge
(including children), except that they are supervised or guided by a person
responsible for their safety when using the appliance. Children should be
supervised to ensure that they do not play with the appliance.
(2)This instruction manual is universal manual, some functions introduced in
this manual are only applicable to specific products; all the illustrations and
information in this manual are only for reference, and the control interface should be
subject to the actual interface.
(3)In order to better meet the customers’ demand, our company will improve
the product continuously and we have the right to conduct necessary modification at
any time due to the reason of sales or production, and will reserve the right of
modification without further notification.
(4)We will bear no responsibility for the personal injury, property loss or
damage of equipment due to improper installation and debugging, unnecessary
maintenance, non-observance of related national laws, regulations, and industrial
standards, violation of any stipulations of this instruction manual, etc.
(5)The final authority for the interpretation of this instruction manual belongs to
Gree Electric Appliances, Inc. of Zhuhai.

Contents
1 Safety Notices (Please be sure to abide).........................1
2 User Notice.........................................................................1
3 Function and Parameter....................................................2
3.1 Functional Overview ...............................................................2
3.2 Parameter Specifications........................................................2
4 Parts and Assembly...........................................................3
5 Introduction for Controller................................................3
5.1 Interface..................................................................................3
5.2 LED Display ............................................................................4
5.3 Button......................................................................................5
5.4 DIP Switch...............................................................................5
6 Application .........................................................................7
6.1 Long-distance Monitor System................................................7
6.2 Power billing of Gree multi VRF..............................................9
7 Product Installation ...........................................................9
7.1 Product Size and Spatial Size for Electric Control Cabinet
Installation.....................................................................................9
7.2 Selection of Communication Wire Material...........................11
8 Power billing function .....................................................18
8.1 Composition of the system....................................................18
8.2 KWH Meter & Current Transformer.......................................18
8.3 Network topological graph ....................................................19
8.4 Connection of Communication Cables..................................20
8.5 Function debugging ..............................................................24
9 Appendix A: Selection of KWH Meter & Current
Transformer.........................................................................26
10 Attachment B TCP/IP Setting........................................29

Important Statements
Dear User,
Thank you for choosing Gree air conditioning management system kit. The
system includes GREE Intelligent Remote Eudemon and ME20-24/D1(T) and it
supports not only the remote control function but also the power billing function of
multi VRF. When you have decided to use the power billing function of this system,
it is deemed that you’ve learnt and accepted the following items:
（1）Gree Electric Appliances Inc. of Zhuhai reserves all rights for the final
interpretation of this calculation method.
（2）This Gree Intelligent Billing System provided by Gree Electric Appliances
Inc. of Zhuhai will not accept any test or verification done by any entity or
person in terms of the reasonableness of the calculation method.
（3）Our company will not assume any legal responsibility if product fails to work
normally and/or results in other losses because of force majeure such as
hacker attack, government regulation, power failure or other network and
communication problem.
（4）When using Gree Intelligent Billing System, make sure the controller is
power connected. Our company will not assume any legal responsibility for
any losses caused by power failure of the controller.
（5）All graphics in this manual are for reference only. Please refer to the actual
product.
Before installing and using this device, please pay special attention to the
following items:
1) Device Installation
①Make sure this device is installed indoors in an electric control cabinet that is
difficult to reach and is securely locked.
②Please install this device in a place without either wave interference or dust.
③Power cord must be arranged separately from communication cables.
④Never lay the power cord and communication cables along with a lightning
conductor.

⑤Make sure the indoor unit will not be powered off arbitrarily. Otherwise other
indoor units that are in the same system will not function normally (poor
cooling, malfunction of lack of indoor unit).
⑥Normal working conditions for controller:
a. Temperature: -20 ～+60℃.
b. Humidity: less than 85%, except frosting.
c. Location: indoor (it is highly recommended to install this product in the
electric control cabinet), not subject to direct sunlight, rain and snow etc.
2) Power Supply
①Installation must be performed by professional personnel. Improper
installation may result in fire hazard or electric shock.
②Do not insert the power plug into a power socket until you make sure it is dry
and clean.
③Before touching the electric components, make sure the device is power-off.
④Never touch the device with wet hands, otherwise electric shock may occur.
⑤Power cord of stated specification must be used. Poor contact or improper
installation may lead to fire hazard.
⑥If power cord is connected inversely or the input power is out of the allowable
range, it may lead to fire hazard or even cause damage to the device.
3) Communication
①Make sure the communication cables are connected to correct ports,
otherwise communication error will occur.
②After the circuit is connected, use insulated adhesive bandage to protect the
circuit from oxidation and short circuit.
4) Debugging
①If main board of outdoor unit needs to be replaced, each DIP switch of the
new main board must be the same with that of the original board.
②If KWH meter needs to be replaced, the code of the new KWH meter must be
different from that of the original KWH meter.
③To ensure accurate billing, prohibit cutting off the power supply of KWH meter.
Otherwise, it may lead to abnormal calculation of electricity
④If main board of indoor unit needs to be replaced, the project code of the new
main board must be the same with that of the original board.

⑤If the unit or controller needs to be replaced, it’s necessary to confirm
whether matched resistance is connected to the unit or controller. Configure
the new unit or controller according to the confirmed results.
⑥If any change is made to the unit, for instance, adding or reducing units,
controller must be restarted. 3min after controller is restarted, start up the
Intelligent Billing Eudemon to restart self-check and configuration.
⑦Please power on the controller 3min after the unit is debugged and
communication is normal. Do not enable software self-check and
configuration until the controller is energized for 3min.
⑧If unit is found with errors, e.g. communication error, system conflict, project
code conflict, etc., it is necessary to eliminate errors for the first time to
ensure normal calculation.
⑨Please install UPS power supply for the controller and make sure the
controller is always energized so as to ensure normal calculation.
⑩If the KWH meter has communication error, please eliminate the error
immediately. Otherwise calculation result will be incorrect.
⑪If the indoor unit has communication error for a long time, please confirm
whether it is power-off or damaged. If power connection is normal and the
unit can be used, please eliminate the error in time.

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1 Safety Notices (Please be sure to abide)
WARNING: If not abide strictly, it may cause severe damage to the unit or
the people.
NOTICE: If not abide strictly, it may cause slight or medium damage to the
unit or the people.
This sign indicates that the operation must be prohibited. Improper
operation may cause severe damage or death to people.
This sign indicates that the items must be observed. Improper operation
may cause damage to people or property.
WARNING!
This product can’t be installed at corrosive, inflammable or explosive
environment or the place with special requirements, such as kitchen.
Otherwise, it will affect the normal operation or shorten the server life of the
unit, or even cause fire hazard or serious injury. As for above special places,
please adopt special air conditioner with anti-corrosive or anti-explosion
function.
2 User Notice
Dear customer:
Please read this manual carefully prior to installation and operation and strictly
observe all installation and operation instructions covered in the manual.
Special attentions shall be paid to the following marks:
WARNING! This mark indicates operation, which if improperly performed, might lead to
the death or serious injury of the users.
CAUTION!
This mark indicates operation, which if improperly performed, might possibly
result in damage to the device.
WARNING!
Installation shall be performed by the qualified personnel; otherwise it would result in a fire hazard or
electric shock.
Do not place the plug of the power supply into the socket before it is dried and cleaned.
Cut off the power supply before touching the electric element.
Do not touch this device with wet hands; otherwise it would result in electric shock.
Do use the power cable specified in this manual; otherwise it would result in a fire hazard.
When the power cable is reversely connected or the power supply is beyond the rated range, it

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WARNING!
would result in a fire hazard or even damages to this device.
For PLUGGABLE EQUIPMENT, the socket-
outlet shall be installed near the equipment and shall be
easily accessible.
Do install this device inside the electric control cabinet which is located indoor and then is locked.
Do install this device where it will not be subject to the electromagnetic interference or heavy dust.
CAUTION!
Be sure the specified adaptor is used; otherwise this device would work improperly or even be
damaged.
Be sure this device is setup in place; otherwise it would result in communication fault.
Be sure the communication line is connected to the correct interface; otherwise it would result in
communication fault.
After connection, lines should be protected with insulating tape to avoid oxidation and short circuits.
Risk of explosion if battery is replaced by an incorrect type, dispose of used batteries according to
the instructions.
Normal working conditions for Controller:
①Temperature : -20～60℃;
②Humidity: less than 85%,except for the condensation of dew;
③
Location: indoor (it is highly recommended to install this product in the electric control cabinet), not
subject to direct sunlight, rain and snow etc.
Graphics in the instruction manual are for reference only.
3 Function and Parameter
3.1 Functional Overview
Intelligent Controller (Model: ME20-24/D1(T)) is used together with Intelligent
Remote Eudemon system, which can realize the supervision and control of
multi VRF systems. Using method for Intelligent Remote Eudemon system please
see the instruction manual of such software.
Applicable models: GMV6,GMV5S,GMV5,GMV water, GMV ES,GMV Tops,
GMV Star.
3.2 Parameter Specifications
3.2.1 Controller TCP/IP Parameter (Default)
IP Address:192.168.1.150
Subnet Mask:255.255.255.0
Default Controller:192.168.1.1
CAUTION:Before using the controller, configure the service IP and service port

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first, otherwise, the controller will not work normally. After altering the TCP/IP
parameter, restart the controller, the alteration will take effect.
4 Parts and Assembly
This kit includes the following parts. Please check before installation.
Controller
1 set
Instruction manual
1 set
Wiring terminal
4 sets
5 Introduction for Controller
5.1 Interface
5.1.1 Diagram of Interface Function
Fig. 5.1 Schematic of interfaces
5.1.2 Power
The input power supply is 24V DC, there are two power supply input interfaces,
only one is needed during operation; the power supply output is not applicable in
this device, please do not connect to electric appliance, otherwise it may cause
malfunction of Controller.

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5.1.3 Communication Interface
CAN comm port: connect it to the AC unit through the 2-core communication
line to realize the communication between Controller and the AC which adopts CAN
protocol.
RS485-1 comm port:this device will not use this interface temporarily.
RS485-2 comm port: this device will not use this interface temporarily.
USB and SD card port: this device will not use this interface temporarily.
Ethernet comm port ETH0:communicate with Intelligent Remote Eudemon
system via netting twine.
Ethernet comm port CONFIG: this device will not use this interface temporarily.
5.2 LED Display
As shown in the picture below, open the black transparent front panel.
Fig 5.2 Schematic diagram of opening the black transparent board
Indicators, buttons and DIP switch are as shown below.
Fig 5.3 The schematic diagram of the Controller LED light board and DIP switch
The above LED indicator is mainly consist of two parts: status indicator (run,

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power) and communication indicator (CAN and RS485). The following table is the
working status of each indicator.
CAN RX When receiving the data of equipment (eg. AC unit) which connects to
Controller, it blinks.
TX When transmitting data to the equipment (eg. AC unit) which connects to
Controller, it blinks.
RS485-1 RX For the power billing function, when connected to the KWH meter and
receiving the data replied, it blinks.
TX
For the power billing function, when connected to the KWH meter and the
data is transferred to the KWH meter, it blinks.
RS485-2
RX
This device does not use this LED indicator.
TX
This device does not use this LED indicator.
STAT
When power supply of Controller is normal, it is on.
BEAT
When Controller is running normally, it blinks.
BACKUP
This device does not use this LED indicator.
5.3 Button
SHT/DWN When the fourth digit of DIP switch code is “1”, hold the button for 5
s and
all indicators will be on. Reset the Controller controller.
BACKUP
Not use this button for this device temporarily.
5.4 DIP Switch
NOTICE!
Before using this device, please conduct DIP switch setting first, otherwise the
unit will not function normally!
Controller dial-up setting area is consisting of function DIP switch code.
5.4.1 Diagram of Dial-up Machine

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5.4.2 The 1st Lever of Functional DIP Switch—CAN2 Bus Matched
Resistance Setting
NOTICE! Main control ODU or Controller at the top/end of CAN2 bus must be
with matched resistance; otherwise the communication might be wrong!
※CAN2 bus: Specific meaning shall refer to the specification in Fig Internet
topological graph.
The No.1 dial-up button in function dial-up machine shall be used in the setting
in the matched resistance of CAN2 bus in this Controller.
When the Controller is at the top/end of CAN2 bus, the Controller shall be with
the matched resistance, then dial the No.1 function dial-up machine to 1.
When the Controller is not at the top/end of CAN2 bus, the Controller is not with
the matched resistance, then dial it to 0.
Fig. 5.4 Controller access CAN2 network matching resistance setting
Fig. 5.5 Schematic of dial code

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5.4.3 The 2nd Lever of Functional DIP Switch—RS-485 Bus Matched
Resistance Setting
The 2nd lever of the functional DIP switch is used for setting matched
resistance for controller in RS-485 bus (It is referred to as the KWH meter
communication bus in the network).
If the controller needs to be the joint with matched resistance in RS-485 bus,
the 2nd lever should be set with matched resistance.
5.4.4 The 4st Lever of Functional DIP Switch—Controller Reset
Selection Bits
When there’s an error in configuring Controller IP address, subnet mask,
default Controller, Controller name or Controller ID from the webpage, and the
webpage can’t be accessed, user can reset the Controller to restore factory default
information. Dial the fourth digit of the DIP switch code to “1”, hold SHT/DWN button
for 5s to restore the default information of factory setting of the Controller.
6 Application
6.1 Long-distance Monitor System
The controller(ME20-24/D1(T)) is equipped with the monitoring function for
multi VRF. It realizes the monitor of Intelligent Remote Eudemon System on CAN
bus Gree multi VRF through controller(ME20-24/D1(T)).

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6.1.1 Internet Topological Graph
Fig. 6.1 Network topology
topological graph statement:
CAN2 bus network: L1 shown in Fig. 6.1 is CAN2 bus, which consists of
controller and master outdoor unit of system; one CAN2 network can connect to
16 sets of outdoor units and 255 sets of indoor units. When the quantity of outdoor
units exceeds 16 or the quantity of indoor units exceeds 255, it should be divided
into two CAN2 networks.
CAN1 bus network: L2 shown in Fig. 6.1 is CAN1 bus, which consists of
network and all the outdoor units and indoor units of system; one CAN1 network can
connect to 80 sets of indoor units at most.
Network table: L3 shown in Fig. 6.1 is general network cable, the controller can
connect to Intelligent Remote Eudemon via the network cable.
System: one system consists of one set of outdoor units (one set of outdoor unit

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is a module set, can consist 1~4 modules, that is, 1~4 sets of outdoor units) and its
indoor units.
Quantity of units can be connected to Intelligent Controller: one Intelligent
Controller supports one CAN2 network, can connect to 16 sets of systems or 255
sets of indoor units.
Note: L3 in Fig. 6.1 is standard netting twine, L1 and L2 are twisted-pairs.
6.2 Power billing of Gree multi VRF
The controller(ME20-24/D1(T)) provides the function of power billing of multi
VRF. Please refer to Chapter 8 for concrete description and debugging method for
power billing function.
7 Product Installation
7.1 Product Size and Spatial Size for Electric Control Cabinet
Installation
7.1.1 Product Size
Unit:mm
Fig. 7.1 Controller product size chart

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Notice for installation and operation:
（1）Ensure the specification of power input. Otherwise, Controller can’t work
normally or even be damaged.
（2）Ensure the dial code setting of Controller is correct. Otherwise, there will be
communication malfunction.
（3）Ensure that the communication cord has connected to the correct interface.
Otherwise, there will be communication malfunction.
（4）Do not place Controller in direct sunlight or high-temperature and humid
environment. Place it in the central control cabinet.
7.1.2 Spatial Size for Electric Control Cabinet Installation
Controller shall be installed in electric control cabinet; the front of Controller
shall be hung upward and fixed with 4 screws. See the following fig (for reference).
Fig. 7.2 Controller installation guide
WARNING! Power cord and communication line of Controller must conduct
routing separately (the distance shall be over 15cm); otherwise, it might lead to
Controller communication malfunction!
The thin real line shown in the figure is communication wire and weak current
wire, the thick real line is strong current wire. Above lines are only for reference.

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7.2 Selection of Communication Wire Material
7.2.1 Material Selection for Communication Iine
（1）Model selection of Controller and Intelligent Remote Eudemon system
communication line shall use standard Ethernet communication line, the
length of network cable between Controller and router (computer,
switchboard, etc.) shall not exceed 80m.
（2）Communication line model selection for Controller and AC unit.
Wire type L(m)Communication line between Controller
and AC units
Wire
diameter(mm2) Wire standard Remark
Light-weight/normal
PVC jacket twisted
copper wire
L≤ 500 ≥ 2×0.75 IEC 60227-
5:2007
Total
communication
length shall not
exceed 500m
7.2.2 Communication Connection Method
（1）Communication connection between Controller and Intelligent Remote
Eudemon system:
Fig. 7.3 Connecting method between Controller and router

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（2）Communication connection between Controller and AC units (n is the
quantity of ODU system, n ≤ 16)
Fig. 7.4 Connecting method of Controller
NOTICE! All communication connection lines under Controller must be in series
connection, star connection shall not be adopted.

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7.2.3 Communication Connection Configuration
（1）Communication line connection between Controller and PC:
Connection diagram between Controller and PC user side:
1) Adopt cross connection network cable, Controller shall directly
connect to PC.
Fig. 7.5 Controller connects to personal computer directly
2) Adopt parallel network cable, Controller shall go through router to
connect to PC.
Fig. 7.6 Controller connects to personal computer via router

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（2）Communication line connection between Controller and AC units:
When Controller is connected to main control unit of ODU, ODU with the
address dial-up of 0 must be connected.
CAN G1 G2
D1D2 G1G2
1 2
ON ON
Main control
Unit of ODU
……
Subordinate
Unit of ODU
Fig. 7.7 Communication connection between Controller and unit
（3）Controller configuration:
Before setting the parameters of Controller, please set the IP address of PC as
the same with the IP address in the same network segment of Controller, as refer to
appendix A; and then open the browser (IE10 and above version, Firefox or Google),
input the default IP address of Controller: http://192.168.1.150, default user name:
config, password: config; after selecting the language, it will enter the login interface,
as is shown in the following fig.
Fig. 7.8 Log on interface