Gree GRS-CQ6.0Pd/Na-K User manual

Air-to-Water Heat Pump
Service Manual
(T1/R410A/50Hz)
GREE ELECTRIC APPLIANCES INC. OF ZHUHAI

GREE COMMERCIALAIR CONDITIONERS AIR-TO-WATER HEAT PUMP
CONTENTS
PRODUCT..............................................................................................................................................1
1MODELS LIST .................................................................................................................................1
1.1 Main Unit ..................................................................................................................................1
1.2 Water Tank ...............................................................................................................................2
2NOMENCLATURE ..........................................................................................................................2
2.1 Main Unit ..................................................................................................................................2
2.2 Water Tank ...............................................................................................................................3
3FUNCTION.......................................................................................................................................3
3.1 Cooling .....................................................................................................................................3
3.2 Heating .....................................................................................................................................3
3.3 Water Heating..........................................................................................................................3
3.4 Cooling +Water Heating.........................................................................................................3
3.5 Heating+ Water Heating.........................................................................................................4
3.6 Emergency Mode....................................................................................................................4
3.7 Quick Water Heating ..............................................................................................................4
3.8 Holiday Mode...........................................................................................................................4
3.9 Forced Operation Mode.........................................................................................................4
3.10 Silent Mode............................................................................................................................4
3.11 Disinfection Mode .................................................................................................................4
3.12 Weather-dependent Heating Mode....................................................................................4
4PRODUCTDATA .............................................................................................................................5
4.1 Product Data at Rated Condition..........................................................................................5
4.2 Operation Range.....................................................................................................................9
4.3 Electrical Data .......................................................................................................................10
5PIPING DIAGRAM ........................................................................................................................ 11
UNITS CONTROL...............................................................................................................................12
1OPERATION FLOWCHART..........................................................................................................12
2MAIN LOGIC .................................................................................................................................12
2.1 Defrosting Mode....................................................................................................................12
2.2 Water-side Auto Anti-freezing in Winter.............................................................................13
2.3 Control of Heating Tape on Chassis...................................................................................13
2.4 Control of Fan........................................................................................................................13
2.5 Control of Compressor.........................................................................................................13
2.6 Control of Electric Expansion Valve ...................................................................................13
3WIRED CONTROLLER.................................................................................................................14
3.1 Dimension ..............................................................................................................................14
3.2 Function..................................................................................................................................14
3.3Installation ...............................................................................................................................62
4CONTROLWIRING DESIGN .......................................................................................................64
INSTALLATION ...................................................................................................................................65
1INSTALLATION OF UNITS ..........................................................................................................65
1.1 Installation Positions.............................................................................................................65
1.2 Matters Need Attention.........................................................................................................66
1.3 Dimension Data.....................................................................................................................66
1.4 Installation Clearance Data .................................................................................................75
1.5 Connection of Pipeline .........................................................................................................80
2ELECTRICWIRINGWORK..........................................................................................................83
2.1 Wiring Principle .....................................................................................................................83
2.2 PCB Outline ...........................................................................................................................84
2.3 Electric Wiring Design ..........................................................................................................88
UNITS MAINTENANCE....................................................................................................................102
1ERROR CODE LIST.....................................................................................................................102
2FLOW CHART OF TROUBLESHOOTING.................................................................................108
3DIAGNOSIS OF DRIVING.......................................................................................................... 112
3.1 Diagnosis Flowchart of Driving of Single-phase Unit ....................................................113
3.2 Diagnosis Flowchart of Driving of Three-phase Unit .....................................................120
METHOD OF TESTING IPM MODULE SHORT CIRCUIT: ........................................................121
4DISASSEMBLYANDASSEMBLYPROCEDURE OF MAIN PARTS .......................................128
5EXPLODED VIEWSAND PART LIST........................................................................................ 145
5.1 Outdoor Exploded View and Part List..............................................................................145
5.2 Indoor Exploded View and Part List .................................................................................153
5.3 Water Tank Exploded View and Part List ........................................................................159

GREE COMMERCIALAIR CONDITIONERS AIR-TO-WATER HEAT PUMP
PRODUCT

AIR-TO-WATER HEAT PUMP PRODUCT
1
PRODUCT
1 MODELS LIST
1.1 Main Unit
Model Nominal
Capacity
Power
Supply Appearance
Refrigerant Model Name kW (V,Ph,Hz) Outdoor Unit Indoor Unit
GRS-CQ6.0Pd/Na-K 6.2
GRS-CQ8.0Pd/Na-K 8.5
GRS-CQ10Pd/Na-K 10
GRS-CQ12Pd/Na-K 12
GRS-CQ14Pd/Na-K 14
GRS-CQ16Pd/Na-K 16
220～240V
1Ph 50Hz
GRS-CQ12Pd/Na-M 12
GRS-CQ14Pd/Na-M 14
R410A
GRS-CQ16Pd/Na-M 15
380～415V
3Ph 50Hz
Note:1Ton =12000Btu/h = 3.517kW

AIR-TO-WATER HEAT PUMP PRODUCT
2
1.2 Water Tank
Model Nominal Cubage(L) Appearance
SXVD200LCJ/A-K 200
SXVD200LCJ/A-M 200
SXVD300LCJ/A-K 300
SXVD300LCJ/A-M 300
SXVD200LCJ2/A-K 200
SXVD200LCJ2/A-M 200
SXVD300LCJ2/A-K 300
SXVD300LCJ2/A-M 300
2 NOMENCLATURE
2.1 Main Unit
G RS - C Q 16 Pd /Na - K （I）
1 2 3 4 5 6 7 8 9
NO. Description Options
1 GREE Air to water heat pump -
2 Heat Pump Water Heater -
3 Heating Mode: circulating
4 Multi Heat pump -
5 Nominal Heating capacity, 16 kW
6 DC Inverter -
7 Refrigerant Type Na-R410A
8 Power Supply K=220~240V-1Ph-50Hz,M=380~415V-3Ph-50Hz
9 Indoor Unit I-Indoor unit, O-outdoor unit

AIR-TO-WATER HEAT PUMP PRODUCT
3
2.2 Water Tank
SX V D 200 L C J2 / A-K
1 2 3 4 5 6 7 8 9
NO. Description Options
1 Tank Used In Heat Pump /
2 Heat Pump Water Tank for GMV
Units /
3 Electric Heater /
4 Volume Of Tank /
5 Stand /
6 Pressure-Resistant /
7 Static heating with dual coiled pipe /
8 Design Sequence Number /
9 Power Supply K=220~240V-1Ph-50Hz,M=380~415V-3Ph-50Hz
3 FUNCTION
3.1 Cooling
In cooling mode: the refrigerant is condensed in the outdoor unit and evaporated in
the indoor unit. Via the heat exchange with water in the indoor unit, the temperature of
water decreases and it releases heat while the refrigerant absorbs heat and
evaporates. With the help of wired controller, the outflow temperature can meet the
user’s requirement. Through the control of valve, the low-temperature water in the
system is connected with indoor fan coil and underground pipe, and exchanges heat
with the indoor air so that the indoor temperature decreases to the required range.
3.2 Heating
In heating mode: the refrigerant evaporates in the outdoor unit and is condensed in
the indoor unit. Via the heat exchange with water in the indoor unit, the water absorbs
heat and its temperature increases while the refrigerant releases heat and is
condensed. With the help of wired controller, the outflow temperature can meet the
user’s requirement. Through the control of valve, the high-temperature water in the
system is connected with indoor fan coil and underground pipe, and exchanges heat
with the indoor air so that the indoor temperature increases to the required range;
3.3 Water Heating
In water heating mode: the refrigerant evaporates in the outdoor unit and is
condensed in the indoor unit. Via the heat exchange with water in the indoor unit, the
water absorbs heat and its temperature increases while the refrigerant releases heat
and is condensed. With the help of wired controller, the outflow temperature can meet
the user’s requirement. Through the control of valve, the high-temperature water in the
system is connected with the coil pipe of bearing water tank, and exchanges heat with
the water in the water tank so that the temperature of water tank increases to the
required range；
3.4 Cooling +Water Heating
When cooling mode exists together with the water heating mode, the user can set the
priority of these two modes based on the needs. The default priority is heat pump. That
is under the default setting, if cooling mode exists together with the water heating mode,

AIR-TO-WATER HEAT PUMP PRODUCT
4
the heat pump gives priority to cooling. In that case, water heating can only realized
with e-heater of the water tank. Inversely, the heat pump gives priority to water heating
and switches to cooling after finishing water heating；
3.5 Heating+ Water Heating
When heating mode exists together with the water heating mode, the user can set the
priority of these two modes based on the needs. The default priority is heat pump. That
is under the default setting, if heating mode exists together with the water heating mode,
the heat pump gives priority to heating. In that case, water heating can only realized
with e-heater of the water tank. Inversely, the heat pump gives priority to water heating
and switches to heating after finishing water heating；
3.6 Emergency Mode
Emergency mode: this mode is only available for heating and water heating. When the
outdoor unit stops due to malfunction, it will enter the corresponding emergency mode;
as to heating mode, after entering the emergency mode, heating can only be realized
through e-heater of the indoor unit. When the setting outflow temperature or indoor
temperature is reached, the e-heater of indoor unit will stop running; as to water
heating mode, the e-heater of indoor unit stops while the e-heater of water tank runs.
When the setting temperature or water tank is reached, the e-heater will stop running；
3.7 Quick Water Heating
In quick water heating mode, the unit runs according to the water heating control of
heat pump and the e-heater of water tank runs at the same time；
3.8 Holiday Mode
This mode is only available for heating mode. This mode is set to keep indoor
temperature or outflow temperature in a certain range, so as to prevent water system of
the unit from freezing or protect certain indoor articles from freezing damage. (This
mode requires installing indoor temperature sensor). When the outdoor unit stops due
to malfunction, the two e-heaters of the unit will run.
3.9 Forced Operation Mode
This mode is only used for refrigerant recovery and debugging of the unit;
3.10 Silent Mode
Silent mode is available in cooling, heating and water heating mode. In silent mode, the
outdoor unit will reduce the running noise via automatic control.
3.11 Disinfection Mode
In this mode, the water heating system can be disinfected. When starting up the
disinfection function and setting corresponding time to meet the requirement of
disinfection mode, the function will start. After the setting temperature is reached, this
mode will terminate.
3.12 Weather-dependent Heating Mode
This mode is only available for space heating. In weather-dependent heating mode, the
indoor temperature is detected and controlled automatically.

AIR-TO-WATER HEAT PUMP PRODUCT
5
4 PRODUCT DATA
4.1 Product Data at Rated Condition
4.1.1 Outdoor
AIR TO WATER HEAT PUMP
Model
GRS-CQ
6.0Pd/N
a-K(O)
GRS-CQ
8.0Pd/Na-
K(O)
GRS-CQ
10Pd/Na-
K(O)
GRS-CQ
12Pd/Na
-K(O)
GRS-CQ
14Pd/Na-
K(O)
Heating(floor heating) kW 6.2 8.5 10 12 14
Capacity1
Cooling(floor cooling) kW 5.5 9.0 10.5 14 15
Heating(floor heating) kW 1.5 2.10 2.50 2.67 3.33
Power
Input1 Cooling(floor cooling) kW 1.6 2.50 3.14 3.68 4.28
EER1 Cooling(floor cooling) - 3.4 3.60 3.35 3.8 3.5
COP1 Heating(floor heating) - 4.1 4.00 4.00 4.5 4.20
Heating(Fan coil or
Radiator) kW 5.5 8.0 9.0 11.5 13
Capacity2
Cooling(for Fan coil) kW 4 6.5 8.0 10 11
Heating(Fan coil or
Radiator) kW 1.8 2.65 2.90 3.35 3.88
Power
Input2Cooling(for Fan coil) kW 1.53 2.50 3.08 3.45 3.93
EER2 Cooling(for Fan coil) - 2.6 2.6 2.6 2.9 2.80
COP2 Heating(Fan coil or
Radiator) - 3.0 3.0 3.1 3.40 3.35
Type - R410A R410A R410A R410A R410A
Refrigerant Charge g 1700 2000 2000 3300 3300
Sanitary water Temperature ℃40-80 40-80 40-80 40-80 40-80
Sound Pressure Level dB(A) 59 59 59 59 59
Gas Piping Connection mm 12.7 15.9 15.9 15.9 15.9
Liquid Piping Connection mm 6.35 9.52 9.52 9.52 9.52
Dimensions Outdoor
unit
W×D×H
(unpacked) mm 921×
427×791
921×
427×791
921×427
×791
950×412
×1253
950×412
×1253

AIR-TO-WATER HEAT PUMP PRODUCT
6
AIR TO WATER HEAT PUMP
Model GRS-CQ12P
d/Na-M(O) GRS-CQ14P d/Na-M(O) GRS-CQ16P d/Na-M(O) GRS-CQ16P d/Na-K(O)
Heating(floor heating) kW 12 14 15 16
Capacity1
Cooling(floor cooling) kW 14 15 15.5 15.5
Heating(floor heating) kW 2.8 3.33 3.9 3.90
Power
Input1 Cooling(floor cooling) kW 3.8 4.28 4.4 4.62
EER1 Cooling(floor cooling) - 3.8 3.5 3.5 3.35
COP1 Heating(floor heating) - 4.5 4.2 4 4.00
Heating(Fan coil or
Radiator) kW 11 12 14 14
Capacity2Cooling(for Fan coil) kW 10 10.5 11 11.5
Heating(Fan coil or
Radiator) kW 3.35 3.8 4.2 4.59
Power
Input2Cooling(for Fan coil) kW 3.45 3.6 4 4.20
EER2 Cooling(for Fan coil) - 2.9 2.8 2.7 2.50
COP2 Heating(Fan coil or
Radiator) - 3.4 3.35 3.2 3.05
Type - R410A R410A R410A R410A
Refrigerant Charge g 3500 3500 3500 3300
Sanitary water Temperature ℃40-80 40-80 40-80 40-80
Sound Pressure Level dB(A) 59 59 62 62
Gas Piping Connection mm 15.9 15.9 15.9 15.9
Liquid Piping Connection mm 9.52 9.52 9.52 9.52
Dimensions
Outdoor
unit W×D×H (unpacked) mm 950×412× 1253 950×412× 1253 950×412× 1253 950×412× 1253
Note :
1 Capacities and power inputs are based on the following conditions:
①.Cooling conditions –
Indoor Water Temperature 23°C/18°C;
Outdoor Air Temperature 35°CDB/24°CWB
②.Heating conditions
Indoor Water Temperature 30°C/35°C;
Outdoor Air Temperature 7°CDB/6°CWB
③.Standard piping length 7.5m
2 Capacities and power inputs are based on the following conditions:
①.Cooling conditions
Indoor Water Temperature 12°C/7°C;
Outdoor Air Temperature 35°CDB/24°CWB
②.Heating conditions –
Indoor Water Temperature 40°C/45°C;
Outdoor Air Temperature 7°CDB/6°CWB
③Standard piping length 7.5m

AIR-TO-WATER HEAT PUMP PRODUCT
7
4.1.2 Indoor
INDOOR UNIT
Model
GRS-CQ
6.0Pd/Na
-K(I)
GRS-CQ
8.0Pd/Na
-K(I)
GRS-CQ
10Pd/Na
-K(I)
GRS-CQ
12Pd/Na
-K(I)
GRS-CQ
14Pd/Na
-K(I)
Power Supply V /
Ph /Hz 220～240V/1Ph/50Hz
Rated input (indoor only) W 3200 6200
Liquid side diameter mm
(inch) 6.35(1/4) 9.52(3/8)
Gas side diameter mm
(inch) 12.7(1/2) 15.9(5/8)
Cooling (FCU) ℃7-25
Cooling (Floor ) ℃18-25
Heating (FCU) ℃25-55(High Temperature Cycle)
Operation
Range(Outflow
water temp.)
Heating (Floor ) ℃25-45 (Low Temperature Cycle)
Type - Water-cooled
Nr. of speed - 3
Power input W 200
pump
Water flow
limit LPM 7.5
Volume Liter 10
Water Pressure
(Max) Bar 3
Expansion
Vessel Water Pressure
(Pre) Bar 1
Type - Sheath
Material - Stainless Steel
Operation - Automatic
Steps - 2
Capacity
Combination KW 1.5+1.5 3+3
Electric
Heater
Power input Ph/V/
Hz 1/230/50
Type - Brazed Plate HEX
Main components
Heat
Exchanger Quantity - 1
Unit(W×D× H) mm 900×500×324
Dimensions
Packed unit(W×D× H) mm 1040×605×380

AIR-TO-WATER HEAT PUMP PRODUCT
8
INDOOR UNIT
Model GRS-CQ16P
d/Na-K(I)
GRS-CQ12P
d/Na-M(I)
GRS-CQ14
Pd/Na-M(I)
GRS-CQ16
Pd/Na-M(I)
Power Supply V /
Ph
/Hz
220～
240V/1Ph/50
Hz 380～415V/3Ph/50Hz
Rated input (indoor only) W 6200
Liquid side diameter mm(in
ch) 9.52(3/8)
Gas side diameter mm(in
ch) 15.9(5/8)
Cooling (FCU) ℃7-25
Cooling (Floor ) ℃18-25
Heating (FCU) ℃25-55(High Temperature Cycle)
Operation
Range(Outflow
water temp.)
Heating (Floor ) ℃25-45 (Low Temperature Cycle)
Type - Water-cooled
Nr. of speed - 3
Power input W 200
pump
Water flow
limit LPM 7.5
Volume Liter 10
Water Pressure
(Max) Bar 3
Expansion
Vessel Water Pressure
(Pre) Bar 1
Type - Sheath
Material - Stainless Steel
Operation - Automatic
Steps - 2 1
Capacity
Combination KW 3+3 6
Electric
Heater
Power input Ph
/V/Hz 1/230/50 3/400/50
Type - Brazed Plate HEX
Main components
Heat
Exchanger Quantity - 1
Unit(W×D× H) mm 900×500×324
Dimensions
Packed unit(W×D× H) mm 1040×605×380

AIR-TO-WATER HEAT PUMP PRODUCT
9
4.1.3 Water Tank (optional)
SXVD200LC_/A-K SXVD300LC_/A-K
SXVD200LC_/A-M SXVD300LC_/A-M
Models
J J2 J J2
Water Tank Volume L 200 300
Electric Heater Power W 3000
mm DN15
Outer diameter
inch 1/2
Cool Water
Inlet Pipe
Screw thread spec 1/2″Female BSP
mm DN15
Outer diameter
inch 1/2
Hot Water
Outlet Pipe
Screw thread
spec 1/2″Female BSP
mm / DN20 / DN20
Outer diameter
inch / 3/4 / 3/4
Circulation
Water Inlet/O
utlet Pipe
Screw thread spec /
3/4″
Female
BSP
/
3/4″
Female
BSP
mm DN20
Outer diameter
inch 3/4
Water
Inlet/Outlet(He
at Pump) Pipe Screw thread spec 3/4″Female BSP
Unit Dimension(ΦD×H) mm Φ540×1595 Φ620×1620
Height mm 630 710
Width mm 1620 1645
Packing
Dimension
Depth mm 625 705
Note :
Tank is optional part, and the specific model of tank shall be selected according to local
weather and professional suggestions.
4.2 Operation Range
Mode Range of Outdoor Temperature(℃)
Heating -20~35
Cooling 10~48
Water heating -20~45

AIR-TO-WATER HEAT PUMP PRODUCT
10
4.3 Electrical Data
Power Supply Leakage
Switch
Minimum
Sectional Area of
Earth Wire
Minimum
Sectional Area of
Power Supply
Wire
Model
V Ph Hz (A) (mm2) (mm2)
GRS-CQ6.0Pd/Na-K(I) 32 6
3×6
GRS-CQ8.0Pd/Na-K(I) 50 10
3×10
GRS-CQ10Pd/Na-K(I) 50 10
3×10
GRS-CQ12Pd/Na-K(I) 50 10
3×10
GRS-CQ14Pd/Na-K(I) 50 10
3×10
GRS-CQ16Pd/Na-K(I) 50 10
3×10
GRS-CQ6.0Pd/Na-K(O) 32 6
3×6
GRS-CQ8.0Pd/Na-K(O) 32 6
3×6
GRS-CQ10Pd/Na-K(O) 32 6
3×6
GRS-CQ12Pd/Na-K(O) 40 10
3×10
GRS-CQ14Pd/Na-K(O) 40 10
3×10
GRS-CQ16Pd/Na-K(O)
220~240V-Ph-50Hz
40 10 3×10
GRS-CQ12Pd/Na-M(I) 16 2.5
5×2.5
GRS-CQ14Pd/Na-M(I) 16 2.5
5×2.5
GRS-CQ16Pd/Na-M(I) 16 2.5
5×2.5
GRS-CQ12Pd/Na-M(O) 25 4
5×4.0
GRS-CQ14Pd/Na-M(O) 25 4
5×4.0
GRS-CQ16Pd/Na-M(O)
380~415V-3Ph-50Hz
25 4 5×4.0
Note:
① Power cables are copper core cable and copper connectors must be used for power
cable connection.
② Leakage Switch is necessary for additional installation. If circuit breakers with
leakage protection are in use, action response time must be less than 0.1 second,
leakage circuit must be 30mA.
③ The above selected power cable diameters are determined based on assumption of
distance from the distribution cabinet to the unit less than 75m. If cables are laid out
in a distance of 75m to 150m, diameter of power cable must be increased to a
further grade;
④ Indoor/outdoor supply cable should be H05RN-F or above.
⑤ The power supply must be of rated voltage of the unit and special electrical line for
air-conditioning.
⑥ All electrical installation shall be carried out by professional technicians in
accordance with the local laws and regulations.
⑦ Ensure safe grounding and the grounding wire shall be connected with the special
grounding equipment of the building and must be installed by professional
technicians.

AIR-TO-WATER HEAT PUMP PRODUCT
11
5 PIPING DIAGRAM
INDOOR UINTOUTDOOR UINT
M
M
M
M
1
2
3
45
6
7
8
10
11
5
12
1 compressor
2 four-way valve
3 finned coil exchanger
4 fan motor
5 filter
6 electronic expansion valve
7 plate heat exchanger
11 flow switch
10 electric heater
9 air-vent valve
8 pump
12 3-way valve
t
R1T
R3T
t
R5T
t
R4T
t
t
R2T
9
tR6T
tR7T
R7T water tank temperature sensor 2
R5T leaving water temperature sensor
R2T Liquid line temperature sensor
R1T plate outlet temperature sensor
R4T returning water temperature sensor
R6T water tank temperature sensor 1
R3T gas line temperature sensor
13
14
15 16
17
18
19
20
13 2-way valve
14 by-pass valve
15 under-floor heating
16 radiator
17 other thermal system
18 water tank
19 expansion tank
20 safety valve

GREE COMMERCIALAIR CONDITIONERS AIR-TO-WATER HEAT PUMP
CONTROL

AIR-TO-WATERHEATPUMP CONTROL
12
UNITS CONTROL
1 OPERATION FLOWCHART
2 MAIN LOGIC
2.1 Defrosting Mode
2.1.1 The condition of start defrosting mode:
Under heating mode or water heating mode, if the accumulative running time of
compressor is over the set interval time of defrosting（default 50min），and the defrosting
temperature(outdoor unit heat exchanger temperature) is lower than the set starting
temperature(default -4℃) ,the unit will start running defrosting, and the 4-way valve will
shut off and the outdoor fan will stop

AIR-TO-WATERHEATPUMP CONTROL
13
2.1.2 The condition of quit defrosting mode:
Under defrosting mode, if the continual defrosting time is over the set continual time of
defrosting（default 10min），and the defrosting temperature is over the set stopping
temperature(default 15℃) ,the unit will restart running heating mode, and the 4-way valve
will turn on and the outdoor fan will run.
2.2 Water-side Auto Anti-freezing in Winter
In low temperature, When the compressor stops (including normal or abnormal stop of the
unit), if auxiliary heat is lower than 3 ℃,water pump will automatically operate and 30s
later the compressor operates.
When outlet water temperature is less than 20℃，the unit will operate while it will stop
when the outlet water temperature is more than 20 ℃.
However, if there is malfunction of the unit, anti-freezing operation will be started by indoor
electric heater (two sets).
2.3 Control of Heating Tape on Chassis
When heating operation starts in low temperature, in order to prevent the condensation
water generated by defrosting from freezing in chassis, which will incur malfunction of
drainage, the heating tape is installed in chassis. If the ambient temperature is lower than
0℃, when the compressor operates, electric heating will operate; if the ambient
temperature is higher than 2 ℃or compressor stops, the electric heating will stop.
2.4 Control of Fan
In cooling, the outdoor fan will adjust fan speed according to pressure detected by high
pressure sensor.
In heating or water heating, the fan will adjust fan speed according to ambient temp.
2.5 Control of Compressor
Output capacity of compressor is adjusted according to the comparison of current outlet
water temperature and setting outlet water temperature or the comparison of indoor
ambient temperature and setting indoor temperature;
The output capacity will not be adjusted within 6 min after the compressor operates; once
compressor stops, it can’t be started within at least 3 min.
2.6 Control of Electric Expansion Valve
In heating or water heating operation, electric exchange valve is adjusted according to
superheat degree of plate-type heat exchanger.
In cooling operation, electric exchange valve is adjusted according to superheat degree of
outdoor heat exchanger.

AIR-TO-WATERHEATPUMP CONTROL
14
Electric expansion valve will not be adjusted within 3 min after the unit operates.
3 WIRED CONTROLLER
3.1 Dimension
3.2 Function
3.2.1 Operation View
18
1
2
3
4
5
6
7
8910111213
14
15
16
17

AIR-TO-WATERHEATPUMP CONTROL
15
NO. Name Function description
①
Heating/Cooling on/off
button
Press the button to turn on or turn off Heating operation or
Cooling operation
② LCD display Display unit information
③ Increasing button Press this button to increase the parameter(winking)
④ Temperature set button Press the button to active temperature set
⑤ Heating/Cooling button Press the button to select heating or cooling operation
⑥
Sanitary heating on/off
button Press the button to turn on or off water heating
⑦ Temperature view button Press the button to view the temperature
⑧
Weather-dependent mode
button
Press this button to turn on or off weather depending operation
mode
⑨ Decreasing button Press this button to decrease the parameter(winking)
⑩ Set button Press the button to save parameter or enter the next menu
⑪ Return button Press this button to return to the previous menu
⑫
Clock setting button
button Press this button to set the clock
⑬ Child lock button Press this button to lock or unlock the button
⑭ Programming button Press this button to set the engineer parameter
⑮ Address setting button Press this button to set the unit address
⑯ ESC button Press this button to return to the main menu
⑰ Silent mode on/off button Press this button to start up or stop Silent operation
⑱ Timer setting button Press this button to set timer function
3.2.2 Display View
Icon. Name Function description
Silent mode This icon indicates that the silent mode is active.
Heating mode This icon indicates that the heating mode is active.
In holiday mode or urgent heating model, the icon will flashing.

AIR-TO-WATERHEATPUMP CONTROL
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Cooling mode This icon indicates that the cooling mode is active.
Weather
depending mode
This icon indicates that the weather depending mode is active.
and in Timing Silent mode, this icon will flashing;
Sanitary heating
mode
This icon indicates that the sanitary heating mode is active.
In urgent sanitary heating model, the icon will flash.
Disinfection mode This icon indicates that the disinfection mode is active.
If disinfection isn’t successful, the icon will flash.
Room air
temperature
This icon indicates that you are setting target room air temperature or
current room air temperature is displaying.
In Timing Temperature mode, this icon will flashing;
Water-Leaving
temperature
This icon indicates that you are setting target leaving temperature or
current leaving temperature is displaying.
In Timing Temperature mode, this icon will flashing;
Sanitary water
tank temperature
This icon indicates that you are setting target sanitary water tank
temperature.
Solar leaving
temperature This icon indicates that you are setting target Solar leaving temperature.
Function setting This icon indicates that you are setting engineer parameter.
Temperature view This icon indicates that you are viewing the some temperature value.
Trouble This icon indicates that trouble is occurred.
Defrosting This icon indicates that the defrost mode is active.
24 hours timer This icon indicates that you are setting 24 hours timer or 24 hours timer is
active.
24 hours
decrease timer
This icon indicates that you are setting 24 hours decrease timer or 24
hours decrease timer is active.
weekly timer This icon indicates and flashing that you are setting weekly timer or weekly
timer is active.
Holiday
reservation
This icon indicates and flashing that you are clearing some day in weekly
timer.
Water pump This icon indicates that the indoor water pump is active.
Outdoor unit This icon indicates that the outdoor unit is active.
The first stage
internal electric
heater
This icon indicates that the first stage internal electric heater which is
located inside the indoor unit is operating.
The second stage
internal electric
heater
This icon indicates that the second stage internal electric heater which is
located inside the indoor unit is operating.
Sanitary water
tank heater
This icon indicates that the electric heater located inside sanitary water
tank is operating.
Thermostat This icon indicates connection with thermostat
Central controller This icon indicates that the unit is controlled by the central controller, and
all the buttons will not effect
Auxiliary solar
thermal pump This icon indicates that auxiliary solar thermal pump is active