ACPro AC Pro C Series User manual

AC Pro C, D, & F Series
18-48k BTU
Installation Instructions
Models
AUHD18ND3FO
AUHD24ND3FO
AUHD30ND3FO
AUHD36ND3FO
AUHD42ND3FO
AUHD48ND3FO
(Refrigerant R410A)

2Technical Information
Control
1. Wired Controller
Installation of Wired Controller
5.1 Standard Accessories
5.2 Installation Position and Requirement
5.3 Installation of Wired Controller
5.4 Removal of Wired Controller
2. Troubleshooting
3. Centralized Controller
7.1 Smart Zone Controller
7.2 Additional Special Functions
Installation
1. Indoor Unit Installation
2. Outdoor Unit Installation
2.1 Before Installation
2.2 Installation Site
2.3 Caution for Installation
2.4 Dimension Data
Table of Contents
3. Refrigeration Piping work
3.1 Refrigeration Piping Work Procedures and Caution in Connecting
3.2 Specification of Connection Pipe
4. Electrical Wiring Work
4.1 Wiring Precautions
4.2 Electrical Wiring
Maintenance
1. Trouble Table
1.1 Main Control Malfunction
1.2 Description of Drive Malfunction
2. Flow Chart of Troubleshooting
2.1 Troubleshooting Flow Chart of Main Control Malfunction
2.2 Troubleshooting Flow Chart of Drive Malfunction
2.3 Interface
2.4 IPM, PFC Testing Method
3. Wiring Diagram
3.1 Outdoor unit
3.2 Indoor unit

3
Technical Information
5 INSTALLATION OF WIRED CONTROLLER
5.1 Standard Accessories
Table 2-5-1 Standard Accessories of Wired Controller
Description Quantity Note
P03 S09 № 1 in Figure 2-5-1
P04 S10 № 2 in Figure 2-5-1
P05 S11 № 3 in Figure 2-5-1
P06 S12 № 4 in Figure 2-5-1
U-Match Series DC Inverter Service Manual
31
5 INSTALLATION OF WIRED CONTROLLER
5.1 Standard Accessories
Table 2-5-1 Standard Accessories of Wired Controller
Description
Quantity
Note
Socket base box installed in the wall
1
No.1 in Figure 2-5-1
Base plate of wired controller
1
No.2 in Figure 2-5-1
Screw M4×25
2
No.3 in Figure 2-5-1
Panel of wired controller
1
No.4 in Figure 2-5-1
Figure 2-5-1
5.2 Installation Position and Requirement
(1) Prohibit installing the wired controller at the misty place or the place with direct sunlight.
(2) Prohibit installing the wired controller at the place near high temperature objects or
water-splashing places.
(3) Prohibit installing the wired controller at the place where faces forward to the window, to avoid
interference of another remote controller from neighborhood.
(4) Cut off the power of heavy current wire in the installation hole of the wall. All power should be cut
off during installation.
(5) In order to avoid abnormal operation due to electromagnetic interference, etc., pay attention to the
following notes during connecting wires:
1) Make sure the tie-in interface of communication wire is correct, otherwise it may lead to
communication malfunction.
2) The signal wires and communication wires of wired controller should be separated from power
cord and connection wire between indoor unit and outdoor unit.
3) If the air conditioner is installed at the strong electromagnetic interference place, signal wire
and communication wire of wired controller must use shielding twisted wire.
5.2 Installation Position and Requirement
1. Prohibit installing the wired controller at the misty place or the place with direct sunlight.
2. Prohibit installing the wired controller at the place near high temperature objects or water-splashing places.
3. Prohibit installing the wired controller at the place where faces forward to the window, to avoid interference of
another remote controller from neighborhood.
4. Cut off the power of heavy current wire in the installation hole of the wall. All power should be cut off during
installation.
5. In order to avoid abnormal operation due to electromagnetic interference, etc., pay attention to the following notes
during connecting wires:
a. Make sure the tie-in interface of communication wire is correct, otherwise it may lead to communication
malfunction.
b. The signal wires and communication wires of wired controller should be separated from power cord and
connection wire between indoor unit and outdoor unit.
c. If the air conditioner is installed at the strong electromagnetic interference place, signal wire and
communication wire of wired controller must use shielding twisted

4Technical Information
5.3 Installation of Wired Controller
Firstly, the selection and connection way of wired controller’s signal wire are as below:
1. Choose suitable signal wire: 2-core signal wire (wire diameter ≥0.75mm2 (AWG18), wire length<30m (98-2/5ft) and
the recommended length is 8m (26-1/4ft).
2. Make sure the power of indoor unit is cut off; fix the signal wire of wired controller on the wiring board for wired
controller of indoor unit with screws; make sure the signal wire is solid.
Then, the detailed installation procedures of wired controller are as shown in Figure 2-5-2:
Brief instructions of installation procedure:
1. Pull out the 2-core signal wire in the installation hole of the wall and then let this wire go through the hole at the
back of wired controller’s base plate.
2. Fix the base plate and installation hole of the wall together with screw M4×25mm (3/16×1inch).
3. Fix the above mentioned 2-core signal wire on the copper insert X1 and X2 with the equipped screws of wired
controller.
3. Fasten the wired controller’s panel with its base plate together.
5.4 Removal of Wired Controller
U-Match Series DC Inverter Service Manual
32
5.3 Installation of Wired Controller
Firstly, the selection and connection way of wired controller’s signal wire are as below:
(1) Choose suitable signal wire: 2-core signal wire (wire diameter 0.75mm2(AWG18), wire
length<30m (98-2/5ft) and the recommended length is 8m (26-1/4ft).
(2) Make sure the power of indoor unit is cut off; fix the signal wire of wired controller on the wiring
board for wired controller of indoor unit with screws; make sure the signal wire is solid.
Then, the detailed installation procedures of wired controller are as shown in Figure 2-5-2:
Figure 2-5-2 Installation of wired controller
Brief instructions of installation procedure:
(1) Pull out the 2-core signal wire in the installation hole of the wall and then let this wire go through
the hole at the back of wired controller’s base plate.
(2) Fix the base plate and installation hole of the wall together with screw M4×25mm (3/16×1inch).
(3) Fix the above mentioned 2-core signal wire on the copper insert X1 and X2 with the equipped
screws of wired controller.
(4) Fasten the wired controller’s panel with its base plate together.
5.4 Removal of Wired Controller
Figure 2-5-3 Removal of wired controller
U-Match Series DC Inverter Service Manual
32
5.3 Installation of Wired Controller
Firstly, the selection and connection way of wired controller’s signal wire are as below:
(1) Choose suitable signal wire: 2-core signal wire (wire diameter 0.75mm2(AWG18), wire
length<30m (98-2/5ft) and the recommended length is 8m (26-1/4ft).
(2) Make sure the power of indoor unit is cut off; fix the signal wire of wired controller on the wiring
board for wired controller of indoor unit with screws; make sure the signal wire is solid.
Then, the detailed installation procedures of wired controller are as shown in Figure 2-5-2:
Figure 2-5-2 Installation of wired controller
Brief instructions of installation procedure:
(1) Pull out the 2-core signal wire in the installation hole of the wall and then let this wire go through
the hole at the back of wired controller’s base plate.
(2) Fix the base plate and installation hole of the wall together with screw M4×25mm (3/16×1inch).
(3) Fix the above mentioned 2-core signal wire on the copper insert X1 and X2 with the equipped
screws of wired controller.
(4) Fasten the wired controller’s panel with its base plate together.
5.4 Removal of Wired Controller
Figure 2-5-3 Removal of wired controller

5
Technical Information
6 TROUBLESHOOTING
Display of Error Code
Table 2-6-1 Error Code List
No. Error
E1 Compressor high pressure protection
E2 Freeze protection
E3 Compressor low pressure protection, refrigerant lacking protection, refrigerant recycling mode
E4 Compressor high discharge temperature protection
E6 Communication malfunction
E8 Malfunction of indoor fan motor
E9 Full water protection
F0 Malfunction of indoor ambient temperature sensor
F1 Malfunction of evaporator temperature sensor
F2 Malfunction of condenser temperature sensor
F3 Malfunction of outdoor ambient temperature sensor
F4 Malfunction of discharge temperature sensor
F5 Malfunction wired controller temperature sensor
C5 Wrong dial switch of capacity
EE Malfunction of outdoor main control memory chip
PF Malfunction of electric box sensor
H3 Compressor overload protection
H4 Overload protection
H5 IPM protection
H6 Malfunction of DC fan motor
H7 Drive desynchronizing protection
HC PFC protection
L1 Malfunction of humidity sensor
Lc Start-up failure
Ld Compressor phase protection
LF Power protection
Lp Models of indoor unit and outdoor unit do not match with each other
U7 Direction changing malfunction of 4-way valve
P0 Drive reset protection
P5 Overcurrent protection
P6 Communication malfunction between main control and drive
P7 Malfunction of drive module sensor
P8 High temperature protection of drive module
P9 Zero-cross protection
PA AC current protection
PC Malfunction of drive current
Pd Sensor connection protection
PE Temperature excursion protectionv
PL Low voltage protection of bus bar
PH High voltage protection of bus bar
PU Charging circuit malfunction
PP Abnormity of input voltage
ee Malfunction of outdoor drive memory chip

6Technical Information
When there is a malfunction during operation, error will be displayed on the temperature displaying zone of LCD. When sever-
al malfunctions occur at the same time, these error codes will be displayed circularly.
When there is a malfunction, please turn off the unit and ask the professional for maintenance.
For example, E1 means high pressure protection during operation.
7 CENTRALIZED CONTROLLER
7.1 Smart Zone Controller
7.1.1 Function
The smart zone controller can directly control up to 16 sets of indoor units in a control network and is available to check
the running status of any unit through the LCD, including running mode, timer, fan speed, centralized control and shielding
setting etc.
7.1.2 Outline Drawing of Press Buttons
U-Match Series DC Inverter Service Manual
34
When there is a malfunction during operation, error will be displayed on the temperature displaying
zone of LCD. When several malfunctions occur at the same time, these error codes will be displayed
circularly.
When there is a malfunction, please turn off the unit and ask the professional for maintenance.
For example, E1 means high pressure protection during operation.
Figure 2-6-1
7 CENTRALIZED CONTROLLER
7.1 Smart Zone Controller
7.1.1 Function
The smart zone controller can directly control up to 16 sets of indoor units in a control network and is
available to check the running status of any unit through the LCD, including running mode, timer, fan speed,
centralized control and shielding setting etc.
PE
Temperature excursion protection
PL
Low voltage protection of bus bar
PH
High voltage protection of bus bar
PU
Charging circuit malfunction
PP
Abnormity of input voltage
ee
Malfunction of outdoor drive memory chip
U-Match Series DC Inverter Service Manual
35
7.1.2 Outline Drawing of Press Buttons
Figure 2-7-1
7.1.3 Functions of Press Buttons
Table 2-7-1 Functions of Press Buttons
No.
Name
Function Description
1
Mode
It is used for the switchover among different modes.
2
Fan
It is used to set the fan speed, high, medium, low or auto.
3
On/Off
It is used to set the on/off status of the indoor unit.
4

.Under the single/centralized control status: It is used to set the running
temperature of the indoor unit with max.30°C (86) anmin.16°C (61);
.Under the timing setting status: It is used to set the timing period with max.24
hours and min.0 hour;
.Under the clock setting status: it is used to set the hour (max.:23, min.: 0) and
minute (max.:59, min.: 0) of the clock.
5

6
Mon
1/9
It is used for the switchover between unit 1 and unit 9;
Under the timing or clock setting status, it indicates Monday.
7
Tue
2/10
It is used for the switchover between unit 2 and unit 10;
Under the timing or clock setting status, it indicates Tuesday.
8
Wed
3/11
It is used for the switchover between unit 3 and unit 11;
Under the timing or clock setting status, it indicates Wednesday.

7
Technical Information
7.1.3 Functions of Press Buttons
Table 2-7-1 Functions of Press Buttons
No. Function Description
1 Mode It is used for the switchover among different modes.
2Fan It is used to set the fan speed, high, medium, low or auto.
3On/Off It is used to set the on/off status of the indoor unit.
41. Under the single/centralized control status: It is used to set the running temperature of the indoor unit
with max.30°C (86º) anmin.16°C (61º);
2. Under the timing setting status: It is used to set the timing period with max.24 hours and min.0 hour;
3. Under the clock setting status: it is used to set the hour (max.:23, min.: 0) and minute (max.:59, min.:
0) of the clock.
5
6Mon
1/9
It is used for the switchover between unit 1 and unit 9;
Under the timing or clock setting status, it indicates Monday.
7Tue
2/10
It is used for the switchover between unit 2 and unit 10;
Under the timing or clock setting status, it indicates Tuesday.
8Wed
3/11
It is used for the switchover between unit 3 and unit 11;
Under the timing or clock setting status, it indicates Wednesday.
9Thu
4/12
It is used for the switchover between unit 4 and unit 12;
Under the timing or clock setting status, it indicates Thursday.
10 Fri
5/13
It is used for the switchover between unit 5 and unit 13;
Under the timing or clock setting status, it indicates Friday.
11 Sat
6/14
It is used for the switchover between unit 6 and unit 14;
Under the timing or clock setting status, it indicates Saturday.
12 Sun
7/15
It is used for the switchover between unit 7 and unit 15;
Under the timing or clock setting status, it indicates Sunday.
13 8/16 It is used for the switchover between unit 8 and unit 16.
14 Timer/Time It is used to set the timing or on/off time of the selected indoor unit as well as to set the clock of
the system.
15 Central It is used for the switchover between single and centralized control modes.
16 Shield It is used to deactivate some or all functions of a single or a group the indoor unit(s).
17 All on/off It is used to start/stop all indoor units.
7.1.4 LCD of the Controller
7.1.4.1 Outline Drawing of the LCD
7.1.4.2 Introduction to Symbols on the LCD
U-Match Series DC Inverter Service Manual
36
9
Thu
4/12
It is used for the switchover between unit 4and unit 12;
Under the timing or clock setting status, it indicates Thursday.
10
Fri
5/13
It is used for the switchover between unit 5and unit 13;
Under the timing or clock setting status, it indicates Friday.
11
Sat
6/14
It is used for the switchover between unit 6 and unit 14;
Under the timing or clock setting status, it indicates Saturday.
12
Sun
7/15
It is used for the switchover between unit 7 and unit 15;
Under the timing or clock setting status, it indicates Sunday.
13
8/16
It is used for the switchover between unit 8 and unit 16.
14
Timer/Time
It is used to set the timing or on/off time of the selected indoor unit as well as to set
the clock of the system.
15
Central
It is used for the switchover between single and centralized control modes.
16
Shield
It is used to deactivate some or all functions of a single or a group the indoor unit(s).
17
All on/off
It is used to start/stop all indoor units.
7.1.4 LCD of the Controller
7.1.4.1 Outline Drawing of the LCD
Figure 2-7-2
7.1.4.2 Introduction to Symbols on the LCD
Figure 2-7-3
U-Match Series DC Inverter Service Manual
36
9
Thu
4/12
It is used for the switchover between unit 4and unit 12;
Under the timing or clock setting status, it indicates Thursday.
10
Fri
5/13
It is used for the switchover between unit 5and unit 13;
Under the timing or clock setting status, it indicates Friday.
11
Sat
6/14
It is used for the switchover between unit 6 and unit 14;
Under the timing or clock setting status, it indicates Saturday.
12
Sun
7/15
It is used for the switchover between unit 7 and unit 15;
Under the timing or clock setting status, it indicates Sunday.
13
8/16
It is used for the switchover between unit 8 and unit 16.
14
Timer/Time
It is used to set the timing or on/off time of the selected indoor unit as well as to set
the clock of the system.
15
Central
It is used for the switchover between single and centralized control modes.
16
Shield
It is used to deactivate some or all functions of a single or a group the indoor unit(s).
17
All on/off
It is used to start/stop all indoor units.
7.1.4 LCD of the Controller
7.1.4.1 Outline Drawing of the LCD
Figure 2-7-2
7.1.4.2 Introduction to Symbols on the LCD
Figure 2-7-3

8Technical Information
Table 2-7-2 Introduction to the Symbols on the LCD
No. Function Description
1 Fan speed It displays the fan speed of the indoor unit, high, medium, low and auto.
2 Running mode It displays the running mode of the indoor unit, auto, cool, dry, fan and heat.
3 System clock It displays the current time (hour and minute) in 24-hour time system and also the week day.
4 Shield It displays the shield status, “ALL, “TEMP”, “MODE” and „On/Off”.v
5 Weekly timer It displays the timing period (unit: 0.5 hour) which will circulate every week.
6Set temperature
Indoor unit code
It displays the set temperature, indoor unit code (01-16), and symbols of Celsius and Fahrenheit scale.
7 Control mode It displays “CENTER” under the centralized control mode and no display under the single control mode.
8
Ambient
temperature
Serial port
It displays the ambient temperature, serial port as well as symbols of Celsius and Fahrenheit scale.
9Indoor unit code
On/off status
Numbers indicate the indoor unit codes which will be displayed when the corresponding indoor unit is
online; “” indicates the on/off status of the indoor unit, its flashing for “on” or else for “off”
10 Error
Child lock
It displays the error codes when some error(s) arises and also “CHILD LOCK” when this
function is activated.
7.1.4.3 Network Topology
Network Connection of the Smart Zone Controller
U-Match Series DC Inverter Service Manual
37
Table 2-7-2 Introduction to the Symbols on the LCD
No.
Name
Description
1
Fan speed
It displays the fan speed of the indoor unit, high, medium, low and
auto.
2
Running mode
It displays the running mode of the indoor unit, auto, cool, dry, fan and
heat.
3
System clock
It displays the current time (hour and minute) in 24-hour time system
and also the week day.
4
Shield
It displays the shield status, “ALL’, “TEMP”, “MODE” and ‘On/Off”.
5
Weekly timer
It displays the timing period (unit: 0.5 hour) which will circulate every
week.
6
Set temperature
Indoor unit code
It displays the set temperature, indoor unit code (01-16), and symbols
of Celsius and Fahrenheit scale.
7
Control mode
It displays “CENTER” under the centralized control mode and no
display under the single control mode.
8
Ambient
temperature
Serial port
It displays the ambient temperature, serial port as well as symbols of
Celsius and Fahrenheit scale.
9
Indoor unit code
On/off status
Numbers indicate the indoor unit codes which will be displayed when
the corresponding indoor unit is online; “” indicates the on/off status of
the indoor unit, its flashing for “on” or else for “off”
10
Error
Child lock
It displays the error codes when some error(s) arises and also “CHILD
LOCK” when this function is activated.
7.1.4.3 Network Topology
Network Connection of the Smart Zone Controller
Figure 2-7-4

9
Technical Information
7.1.4.4 Dimensions
7.2 Additional Special Functions
7.2.1 Door control function
Door control function is available for this series. In order to achieve this function, please select the door control accessories
from AC Pro.
1. Interface instructions
a. The interface printing is DOOR-C and the type is B2B-XH-B. The wires of door control accessories must be connected
to this interface;
b. Electrical characteristic: none;
c. Working principle: when the card is inserted, this interface is short-circuited; when the card is not inserted, this
interface is cut off;
Connect the door control detection port of indoor main board with the interface of door control board (CN1 in the following
Figure); connect the door control signal to the door control signal input port (X1 and X2 in the following Figure). X1 is AC
220V signal input and X2 is DC +5V to 24V. You can only choose X1 or X2. Definition of interface is as shown in Figure
below:
U-Match Series DC Inverter Service Manual
38
7.1.4.4 Dimensions
Figure 2-7-5
7.2 Additional Special Functions
7.2.1 Door control function
Door control function is available for this series. In order to achieve this function, please select the
door control accessories from Gree.
(1) Interface instructions
1) The interface printing is DOOR-C and the type is B2B-XH-B. The wires of door control
accessories must be connected to this interface;
2) Electrical characteristic: none;
3) Working principle: when the card is inserted, this interface is short-circuited; when the card is
not inserted, this interface is cut off;
Connect the door control detection port of indoor main board with the interface of door control board
(CN1 in the following Figure); connect the door control signal to the door control signal input port (X1 and
X2 in the following Figure). X1 is AC 220V signal input and X2 is DC +5V to 24V. You can only choose X1
or X2. Definition of interface is as shown in Figure below:
Figure 2-7-6 Illustration of door control port
U-Match Series DC Inverter Service Manual
38
7.1.4.4 Dimensions
Figure 2-7-5
7.2 Additional Special Functions
7.2.1 Door control function
Door control function is available for this series. In order to achieve this function, please select the
door control accessories from Gree.
(1) Interface instructions
1) The interface printing is DOOR-C and the type is B2B-XH-B. The wires of door control
accessories must be connected to this interface;
2) Electrical characteristic: none;
3) Working principle: when the card is inserted, this interface is short-circuited; when the card is
not inserted, this interface is cut off;
Connect the door control detection port of indoor main board with the interface of door control board
(CN1 in the following Figure); connect the door control signal to the door control signal input port (X1 and
X2 in the following Figure). X1 is AC 220V signal input and X2 is DC +5V to 24V. You can only choose X1
or X2. Definition of interface is as shown in Figure below:
Figure 2-7-6 Illustration of door control port

10 Technical Information
Table 2-7-3 Door control wiring port
No. Function Description
1 CN1 CN1 wiring terminal and door control interface of indoor main board
2 X1(AC-L, AC-N) X1(AC-L, AC-N) wiring terminal, connected to door control input signal, rated voltage 220V. X1(AC-L,
AC-N) wiring terminal, connected to door control input signal, rated voltage 220V.
3 X2 X2 wiring terminal, connected to door control input signal
2. Function instructions:
In order to achieve this function, set it through wired controller and refer to the following operation method. It is defaulted
that this function is not activated; if this function is set and door control accessories are connected, the unit will
control the ON/OFF of unit according to the card state detected by door control detection board. When the card is not
connected, the unit will turn to standby state. If the unit is with wired controller, icon will be displayed on the wired
controller.
If the unit is without wired controller, there will be no display. The unit will control the ON/OFF of unit according to the
detected information.
3. Setting method:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the debugging menu. Press
Mode button to adjust to “08” in temperature displaying zone. Timer zone displays setting state and press  or  button
to adjust. There are 2 selections:
a. Without door control function (LCD displays 00)
b. With door control function (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, door control function is
activated. The unit will memorize this setting status. The setting value will be memorized after power failure. The detailed
setting is as shown in the Figure below:
U-Match Series DC Inverter Service Manual
39
Table 2-7-3 Door control wiring port
No.
Terminal name
Terminal instruction
1
CN1
CN1 wiring terminal and door control interface of indoor main board
2
X1(AC-L, AC-N)
X1(AC-L, AC-N) wiring terminal, connected to door control input
signal, rated voltage 220V.
3
X2
X2 wiring terminal, connected to door control input signal
(2) Function instructions:
In order to achieve this function, set it through wired controller and refer to the following operation
method. It is defaulted that this function is not activated; if this function is set and door control accessories
are connected, the unit will control the ON/OFF of unit according to the card state detected by door control
detection board. When the card is not connected, the unit will turn to standby state. If the unit is with wired
controller, icon will be displayed on the wired controller.
If the unit is without wired controller, there will be no display. The unit will control the ON/OFF of unit
according to the detected information.
(3) Setting method:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the
debugging menu. Press Mode button to adjust to “08” in temperature displaying zone. Timer zone displays
 
1) Without door control function (LCD displays 00)
2) With door control function (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, door
control function is activated. The unit will memorize this setting status. The setting value will be memorized
after power failure. The detailed setting is as shown in the Figure below:
Figure 2-7-7
U-Match Series DC Inverter Service Manual
39
Table 2-7-3 Door control wiring port
No.
Terminal name
Terminal instruction
1
CN1
CN1 wiring terminal and door control interface of indoor main board
2
X1(AC-L, AC-N)
X1(AC-L, AC-N) wiring terminal, connected to door control input
signal, rated voltage 220V.
3
X2
X2 wiring terminal, connected to door control input signal
(2) Function instructions:
In order to achieve this function, set it through wired controller and refer to the following operation
method. It is defaulted that this function is not activated; if this function is set and door control accessories
are connected, the unit will control the ON/OFF of unit according to the card state detected by door control
detection board. When the card is not connected, the unit will turn to standby state. If the unit is with wired
controller, icon will be displayed on the wired controller.
If the unit is without wired controller, there will be no display. The unit will control the ON/OFF of unit
according to the detected information.
(3) Setting method:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the
debugging menu. Press Mode button to adjust to “08” in temperature displaying zone. Timer zone displays
 
1) Without door control function (LCD displays 00)
2) With door control function (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, door
control function is activated. The unit will memorize this setting status. The setting value will be memorized
after power failure. The detailed setting is as shown in the Figure below:
Figure 2-7-7

11
Technical Information
Note: You can purchase the accessory from Gree. The information is as below:
Name. Product code Remark
Controller for door control function
(MK03) MC207022 One controller for one unit
7.2.2 Human sensitive function
You can purchase the module of human sensitive function for this series. An interface for this module is reserved on the main
board of indoor unit.
1. Interface instruction:
a. The printing is CN23 and the interface type is JST B3B-PH-K-S;
b. Electrical characteristic: 1-pin: +12V; 2-pin: detection port; 3-pin: GND; current: 150mA;
b. Working principle: when the module detects there is nobody in the room, 2-pin and 3-pin are short-circuited and they
are low electrical level; when there are somebody in the room, 2-pin output is high electrical level.
2. Function instructions:
In order to achieve this function, set it through wired controller and refer to the following operation method. It is defaulted
that this function is not activated; if this function is set and human sensitive module is connected, the unit will control the
ON/OFF of unit according to the signal detected by human sensitive module. When there is nobody in the room and the
unit is with wired controller, icon will be displayed on the wired controller; if the unit is without wired controller, there
will be no display. The unit will control the ON/OFF of unit according to the detected information.
3. Setting method:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the debugging menu. Press
Mode button to adjust to “09” in temperature displaying zone. Timer zone displays setting state and press  or  button
to adjust. There are 2 selections:
a. Without human sensitive function (LCD displays 00)
b. With human sensitive function (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, human sensitive
function is activated. The unit will memorize this setting status. The setting value will be memorized after power failure.
The detailed setting is as shown in the Figure below:
U-Match Series DC Inverter Service Manual
39
Table 2-7-3 Door control wiring port
No.
Terminal name
Terminal instruction
1
CN1
CN1 wiring terminal and door control interface of indoor main board
2
X1(AC-L, AC-N)
X1(AC-L, AC-N) wiring terminal, connected to door control input
signal, rated voltage 220V.
3
X2
X2 wiring terminal, connected to door control input signal
(2) Function instructions:
In order to achieve this function, set it through wired controller and refer to the following operation
method. It is defaulted that this function is not activated; if this function is set and door control accessories
are connected, the unit will control the ON/OFF of unit according to the card state detected by door control
detection board. When the card is not connected, the unit will turn to standby state. If the unit is with wired
controller,
icon will be displayed on the wired controller.
If the unit is without wired controller, there will be no display. The unit will control the ON/OFF of unit
according to the detected information.
(3) Setting method:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the
debugging menu. Press Mode button to adjust to “08” in temperature displaying zone. Timer zone displays
 
1) Without door control function (LCD displays 00)
2) With door control function (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, door
control function is activated. The unit will memorize this setting status. The setting value will be memorized
after power failure. The detailed setting is as shown in the Figure below:
Figure 2-7-7
U-Match Series DC Inverter Service Manual
41
Figure 2-7-8
Note:
When door control function and human sensitive function have been set at the same time, it is
defaulted that door control function is valid and human sensitive function is invalid.
The user can purchase the human sensitive module by himself. Please pay attention to the following
notes:
There is the needle stand interface on the main board. The interface model inserted into this
needle stand must be PH-3P-K;
The current consumption of module can not exceed the current capacity provided by this
interface.
7.2.3 MODBUS interface
The indoor unit of this series has MODBUS interface. If the user needs to connect the unit to the
management system of the building, please enquire Gree for the MODBUS protocol.
Off state of the unit Press Function and Timer buttons
at the same time for 5s to enter the
interface of parameter setting
Press Mode button to adjust to "09" in
temperature displaying zone and enter
setting of human sensitive function
U-Match Series DC Inverter Service Manual
41
Figure 2-7-8
Note:
When door control function and human sensitive function have been set at the same time, it is
defaulted that door control function is valid and human sensitive function is invalid.
The user can purchase the human sensitive module by himself. Please pay attention to the following
notes:
There is the needle stand interface on the main board. The interface model inserted into this
needle stand must be PH-3P-K;
The current consumption of module can not exceed the current capacity provided by this
interface.
7.2.3 MODBUS interface
The indoor unit of this series has MODBUS interface. If the user needs to connect the unit to the
management system of the building, please enquire Gree for the MODBUS protocol.
Press Enter/Cancel button to
save and exit setting; now, human
sensitive function is activated
Press  or button to adjust to 01
in timer zone
Figure 2-7-8

12 Technical Information
Note:
When door control function and human sensitive function have been set at the same time, it is defaulted that door control
function is valid and human sensitive function is invalid.
The user can purchase the human sensitive module by himself. Please pay attention to the following notes:
1. There is the needle stand interface on the main board. The interface model inserted into this needle stand must be
PH-3P-K;
2. The current consumption of module can not exceed the current capacity provided by this interface
7.2.3 MODBUS interface
The indoor unit of this series has MODBUS interface. If the user needs to connect the unit to the management system of the
building, please enquire Gree for the MODBUS protocol.
U-Match Series DC Inverter Service Manual
42
Figure 2-7-9
(1) Interface instruction:
1) The printing is COM-BMS1 and the interface type is B4B-XH-K3;
2) Electrical characteristic: baud rate: 9600bps; standard: RS485;
3) Working principle:
The indoor main board can send out the unit operation state through this interface and receive logical
control information to realize control and monitor of the unit.
(2) Function instructions:
In order to achieve this function, set the address mode and address through wired controller. Please
refer to Point 3 for the setting method. You must set the address mode into long-distance control address
mode.
The address mode is defaulted to be connecting to centralized controller mode and the defaulted
address is 1.
(3) Setting method:
1) Firstly, set the address mode of wired controller into centralized controller address mode. The
setting method is:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the
debugging menu. Press Mode button to adjust to “10” in temperature displaying zone. Timer zone displays
 
Centralized controller address mode (LCD displays 00)
Long-distance control address mode (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, the
address of wired controller is set to match the address of long-distance control. The unit will memorize this
setting status. The setting value will be memorized after power failure. The detailed setting is as shown in
the Figure below:
1. Interface instruction:
a. The printing is COM-BMS1 and the interface type is B4B-XH-K3;
b. Electrical characteristic: baud rate: 9600bps; standard: RS485;
c. Working principle:
The indoor main board can send out the unit operation state through this interface and receive logical control informa-
tion to realize control and monitor of the unit.
2. Function instructions:
In order to achieve this function, set the address mode and address through wired controller. Please refer to Point 3 for the
setting method. You must set the address mode into long-distance control address mode.
The address mode is defaulted to be connecting to centralized controller mode and the defaulted address is 1.
3. Setting method:
a. Firstly, set the address mode of wired controller into centralized controller address mode. The setting method is:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the debugging menu.
Press Mode button to adjust to “10” in temperature displaying zone. Timer zone displays setting state and press  or
 button to adjust. There are 2 selections:
i. Centralized controller address mode (LCD displays 00)
ii. Long-distance control address mode (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, the address of
wired controller is set to match the address of long-distance control. The unit will memorize this setting status. The
setting value will be memorized after power failure. The detailed setting is as shown in the Figure below:

13
Technical Information
U-Match Series DC Inverter Service Manual
43
Figure 2-7-10
2) Address setting of each unit: when the address mode is set to be long-distance control address
mode. The address setting value range is 01~255. The setting method is:
Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting
    tton to adjust the
address sequence and then press Enter/Cancel button to confirm. The setting value will be memorized
after power failure. The detailed setting is as shown in the Figure below:
2. Address setting of each unit: when the address mode is set to be long-distance control address mode. The address
setting value range is 01~255. The setting method is:
Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting interface of wired
controller address. LCD displays address sequence. Press  or  button to adjust the address sequence and then
press Enter/Cancel button to confirm. The setting value will be memorized after power failure. The detailed setting is as
shown in the Figure below:

14 Technical Information
U-Match Series DC Inverter Service Manual
44
Figure 2-7-11
Notes:
In order to realize the MODBUS interface function, the address mode of the unit must be set
into long-distance control address mode; you can not set it into centralized control address
mode, otherwise, this function can not be realized;
The unit can not be connected to MODBUS and centralized controller at the same time; only
one of them can be selected;
255 sets of unit in maximum can be connected in the same network; the unit addresses in the
same network must be different, otherwise, the unit control will be affected;
Perform wiring when the unit power is cut off.
7.2.4 Connect to interface of centralized controller:
The indoor unit is with the interface of centralized controller. When centralized controller is connected,
centralized control of unit can be realized when the wired controller is not connected;
(1) Interface instruction:
1) The printing is COM-BMS2, COM-BMS3 and the interface type is B2B-XH-K3;
2) Electrical characteristic: none;
3) Working principle: centralized control the communication of indoor main board and realize the
unit control;
(2) Function instructions:
Notes:
In order to realize the MODBUS interface function, the address mode of the unit must be set into long-distance control
address mode; you can not set it into centralized control address mode, otherwise, this function can not be realized;
1. The unit can not be connected to MODBUS and centralized controller at the same time; only one of them can be
selected;
2. 255 sets of unit in maximum can be connected in the same network; the unit addresses in the same network must be
different, otherwise, the unit control will be affected;
3. Perform wiring when the unit power is cut off.
7.2.4 Connect to interface of centralized controller:
The indoor unit is with the interface of centralized controller. When centralized controller is connected, centralized control of
unit can be realized when the wired controller is not connected;
1. Interface instruction:
a. The printing is COM-BMS2, COM-BMS3 and the interface type is B2B-XH-K3;
b. Electrical characteristic: none;
c. Working principle: centralized control the communication of indoor main board and realize the unit control;
2. Function instructions:
In order to achieve this function, set the address mode and address through wired controller. Please refer to Point
3 for the setting method. The address mode is defaulted to be connecting to centralized controller mode and the
defaulted address is 1;
When the centralized controller is connected, centralized control of the unit can be realized to control unit ON/OFF,
operation mode, set fan speed/temperature and weekly timer.
3. Setting method:
Firstly, set the address mode of wired controller into centralized controller address mode. The setting method is:
a. Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the debugging menu.
Press Mode button to adjust to “10” in temperature displaying zone. Timer zone displays setting state and press 
or  button to adjust. There are 2 selections:
i. Centralized controller address mode (LCD displays 00)
ii. Long-distance control address mode (LCD displays 01)

15
Technical Information
Choose the first selection and then press Enter/Cancel button to save and exit setting. Now, the address of wired controller
is set to match the address of centralized controller. The unit will memorize this setting status. The setting value will be mem-
orized after power failure. The detailed setting is as shown in the Figure below:
2. Address setting of each unit: when the address mode is set to be centralized controller address mode. The address setting
value range is 01~16. The setting method is:
Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting interface of wired
controller address. LCD displays address sequence. Press  or  button to adjust the address sequence and then press
Enter/Cancel button to confirm. The setting value will be memorized after power failure. The detailed setting is as shown
in the Figure below:
U-Match Series DC Inverter Service Manual
45
In order to achieve this function, set the address mode and address through wired controller. Please
refer to Point 3 for the setting method. The address mode is defaulted to be connecting to centralized
controller mode and the defaulted address is 1;
When the centralized controller is connected, centralized control of the unit can be realized to control
unit ON/OFF, operation mode, set fan speed/temperature and weekly timer.
(3) Setting method:
Firstly, set the address mode of wired controller into centralized controller address mode. The setting
method is:
1) Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to
the debugging menu. Press Mode button to adjust to “10” in temperature displaying zone.
Time  
Centralized controller address mode (LCD displays 00)
Long-distance control address mode (LCD displays 01)
Choose the first selection and then press Enter/Cancel button to save and exit setting. Now, the
address of wired controller is set to match the address of centralized controller. The unit will memorize this
setting status. The setting value will be memorized after power failure. The detailed setting is as shown in
the Figure below:
Figure 2-7-12
2) Address setting of each unit: when the address mode is set to be centralized controller address
mode. The address setting value range is 01~16. The setting method is:

16 Technical Information
U-Match Series DC Inverter Service Manual
46
Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting
     
address sequence and then press Enter/Cancel button to confirm. The setting value will be memorized
after power failure. The detailed setting is as shown in the Figure below:
Figure 2-7-13
When the address is set, the wired controller can be removed and connect the centralized controller to
the indoor main board. Then connect the required units to realize centralized control of these units;
Notes:
When centralized controller is to be connected, set the address mode into centralized
controller address mode through wired controller. Long-distance control address mode can
not be set;
The unit addresses in the same network must be different, otherwise, communication
malfunction will occur and the unit can not work normally;
When centralized controller is to be connected, the unit address range is 1-16. Only 16 sets
of unit in maximum can be connected
The code and model of wired controller is as below:
Name
Product code
Remark
Centralized controller
CE50-24/E
MC207025
Only 16 sets of unit in maximum can be connected to
this controller
When the address is set, the wired controller can be removed and connect the centralized controller to the indoor main board.
Then connect the required units to realize centralized control of these units;
Notes
1. When centralized controller is to be connected, set the address mode into centralized controller address mode through
wired controller. Long-distance control address mode can not be set;
2. The unit addresses in the same network must be different, otherwise, communication malfunction will occur and the unit
can not work normally;
3. When centralized controller is to be connected, the unit address range is 1-16. Only 16 sets of unit in maximum can be
connected
4. The code and model of wired controller is as below:
Name Product code Remark
Centralized controller
CE50-24/E MC207025 Only 16 sets of unit in maximum can be connected to this controller
7.2.5 Light board control:
Light board interface is reserved on the main board of duct type unit. You can purchase Gree light board to realize control of
the unit. When wired control is also connected, you can realize control of the unit through light board and wired controller.
Light board information:
Name Product code Remark
Receiving board Z6L 30260000001 Only for duct type unit

17
Technical Information
There are two buttons on the light board to control ON/OFF of cooling and heating. There are also other indicators and nixie
tube display.
Cooling: set temperature 26°(79°), low fan speed; heating: set temperature 20°(68°), low fan speed
Function instructions: under OFF state, pressing Cool/Heat button can turn on cooling/heating mode. Under unit ON state,
pressing Cool/Heat button can turn off the unit. When the unit is in cooling/heating mode, pressing any button can turn off
the unit.
U-Match Series DC Inverter Service Manual
47
7.2.5 Light board control:
Light board interface is reserved on the main board of duct type unit. You can purchase Gree light
board to realize control of the unit. When wired control is also connected, you can realize control of the unit
through light board and wired controller.
Light board information:
Name
Product code
Remark
Receiving board Z6L
30260000001
Only for duct type unit
There are two buttons on the light board to control ON/OFF of cooling and heating. There are also
other indicators and nixie tube display.
Cooling: set temperature 26°(79), low fan speed; heating: set temperature 20°(68), low fan speed
Function instructions: under OFF state, pressing Cool/Heat button can turn on cooling/heating mode.
Under unit ON state, pressing Cool/Heat button can turn off the unit. When the unit is in cooling/heating
mode, pressing any button can turn off the unit.
Figure 2-7-14
7.2.6 Malfunction output of relay:
There is malfunction outlet signal on the main board of indoor unit; when the unit occurs unrecovered
malfunction, this signal will be output.
(1) Interface instruction:
1) Printing: X5, ERROR
2)    ≤
3) Working principle: when the unit occurs unrecovered malfunction, the relay will suck and 220V
AC signal will be output.
(2) Function instructions:
When the user needs centralized control over several units, malfunction signals can be connected to
control room through this malfunction output interface. The user can indicate the unit malfunction through
malfunction indicator or electric bell, so the management people can go to check the malfunction unit
directly.
If dry contact detection of unit malfunction is needed, please connect this interface into the monitoring
system. When the closed signal is detected when malfunction occurs, this signal can be seen in monitoring
system.
7.2.6 Malfunction output of relay:
There is malfunction outlet signal on the main board of indoor unit; when the unit occurs unrecovered malfunction, this
signal will be output.
1. Interface instruction:
a. Printing: X5, ERROR
b. Electrical characteristic OF malfunction indicator or electric bell: 220V~AC, power≤10W
c. Working principle: when the unit occurs unrecovered malfunction, the relay will suck and 220V AC signal will be
output.
2. Function instructions:
When the user needs centralized control over several units, malfunction signals can be connected to control room
through this malfunction output interface. The user can indicate the unit malfunction through malfunction indicator or
electric bell, so the management people can go to check the malfunction unit directly.
If dry contact detection of unit malfunction is needed, please connect this interface into the monitoring system. When
the closed signal is detected when malfunction occurs, this signal can be seen in monitoring system.

18 Technical Information
U-Match Series DC Inverter Service Manual
48
Figure 2-7-15 Malfunction output
(3) Setting method:
Do not need to set this function
Notes:
The interface voltage should be 220V AC intense current;
If malfunction light is connected, please make sure its power is not too big (it should be within
10W), otherwise, the relay on main board will be burnt.
3. Setting method:
Do not need to set this function
Notes:
1. The interface voltage should be 220V AC intense current;
2. If malfunction light is connected, please make sure its power is not too big (it should be within 10W), otherwise, the relay
on main board will be burnt.

19
Technical Information
U-Match Series DC Inverter Service Manual
49
Figure 2-7-16
Table 2-7-4 Corresponding interfaces of main board
No.
Interface
1
Evaporator temperature sensor
2
Swing motor
3
Human sensitive
4
Door control
5
Full water detection
6
Interface of light board
7
Communication port of centralized controller
8
MODBUS interface
9
Interface of annunciator live wire
10
ON interface of fresh air valve
11
OFF interface of fresh air valve
12
Interface of annunciator neutral wire
13
Interface of DC motor
14
Main board grounding wire
15
Power live wire
16
Power neutral wire
17
Neutral wire of fresh air valve
18
Water pump interface
19
Live wire of fresh air valve
20
Interface of anion generator
21
Interface of auxiliary heating board
22
Interface of outdoor unit
23
Interface of wired controller
24
Monitor interface
25
Ambient temperature sensor
Figure 2-7-16
Table 2-7-4 Corresponding interfaces of main board
No. Interface
1 Evaporator temperature sensor
2 Swing motor
3 Human sensitive
4Door control
5 Full water detection
6 Interface of light board
7 Communication port of centralized controller
8 MODBUS interface
9 Interface of annunciator live wire
10 ON interface of fresh air valve
11 OFF interface of fresh air valve
12 Interface of annunciator neutral wire
13 Interface of DC motor
14 Main board grounding wire
15 Power live wire
16 Power neutral wire
17 Neutral wire of fresh air valve
18 Water pump interface
19 Live wire of fresh air valve
20 Interface of anion generator
21 Interface of auxiliary heating board
22 Interface of outdoor unit
23 Interface of wired controller
24 Monitor interface
25 Ambient temperature sensor

20 Technical Information
7.2.7 Reserved fresh air valve interface for duct type unit
For the reserved connection way of air valve performer, connect it to F, C, O of wiring board according to the wiring diagram.
Connect the public port of air valve to F, connect CLOSE to C and connect OPEN to O.
U-Match Series DC Inverter Service Manual
50
7.2.7 Reserved fresh air valve interface for duct type unit
For the reserved connection way of air valve performer, connect it to F, C, O of wiring board according
to the wiring diagram. Connect the public port of air valve to F, connect CLOSE to C and connect OPEN to
O.
Figure 2-7-17
7.2.8 Interface of anion generator
For the cold plasma anion generator, connect the red line to HEALTH（X4）and the blue line to N2(X6)
according to the principle circuit. The detector of cold plasma anion generator should be places at the air
return. The distance between two detectors should be 10mm (3/8inch) ≤L≤25mm (1inch).
MOTOR
WIRING
DIAGRAM
EARTH
WIRING
DIAGRAM
M
G
GG
POWER L1
L2 L1 L2
F
C
O
2BU
1RD
5WH
8BN
COOL PLASMA
GENERATOR
9RD
L1
L1
RD BU
AP1
15WH
XT1
OUTDOOR
UNIT
1
2
WIRE
CONTROL
XT2
AP2
X1
X2
CLOSE
Fresh Air Valve
Common OPEN
1
2
H1
H2
L2
L4
11RD
12BK
13BN
14OG
COM6
COM7 T2 T3 PUMP-C PUMP
SA
15K 20K
LIQUID SWITCH
Environment
Temp. Sensor Pipe
Temp. Sensor Pump Motor
E500
N2(X6)
AC-L
(X501)
V-NEW-CLOSE(X2)
V-NEW-OPEN(X1)
AC-N
(X500) HEALTH
(X4) N2
(X6)
DC-MOTOR1
Figure 2-7-18
7.2.8 Interface of anion generator
For the cold plasma anion generator, connect the red line to HEALTH(X4) and the blue line to N2(X6) according to the
principle circuit. The detector of cold plasma anion generator should be places at the air return. The distance between two
detectors should be 10mm (3/8inch) ≤ L ≤ 25mm (1inch).
U-Match Series DC Inverter Service Manual
50
7.2.7 Reserved fresh air valve interface for duct type unit
For the reserved connection way of air valve performer, connect it to F, C, O of wiring board according
to the wiring diagram. Connect the public port of air valve to F, connect CLOSE to C and connect OPEN to
O.
Figure 2-7-17
7.2.8 Interface of anion generator
For the cold plasma anion generator, connect the red line to HEALTH（X4）and the blue line to N2(X6)
according to the principle circuit. The detector of cold plasma anion generator should be places at the air
return. The distance between two detectors should be 10mm (3/8inch) ≤L ≤25mm (1inch).
MOTOR
WIRING
DIAGRAM
EARTH
WIRING
DIAGRAM
M
G
GG
POWER L1
L2 L1 L2
F
C
O
2BU
1RD
5WH
8BN
COOL PLASMA
GENERATOR
9RD
L1
L1
RD BU
AP1
15WH
XT1
OUTDOOR
UNIT
1
2
WIRE
CONTROL
XT2
AP2
X1
X2
CLOSE
Fresh Air Valve
Common OPEN
1
2
H1
H2
L2
L4
11RD
12BK
13BN
14OG
COM6
COM7 T2 T3 PUMP-C PUMP
SA
15K 20K
LIQUID SWITCH
Environment
Temp. Sensor Pipe
Temp. Sensor Pump Motor
E500
N2(X6)
AC-L
(X501)
V-NEW-CLOSE(X2)
V-NEW-OPEN(X1)
AC-N
(X500) HEALTH
(X4) N2
(X6)
DC-MOTOR1
Figure 2-7-18