Gree SXD200LCJW/C1-K User manual

AIR SOURCE HEAT PUMP WATER
HEATER SERVICE MANUAL
T1/R134A/50Hz
(GC201510 - I)

Contents
PRODUCT
1 MODELS LIST
2 NOMENCLATURE
3 FUNCTION
4 PRODUCT PARAMETERS
5 WORKING PRINCIPLE
6 OPTIONAL ACCESSORIES
CONTROL
1 UNIT CONTROL
2 WIRED CONTROLLER
3 QUERY PARAMETERS
4 OPERATION INSTRUCTIONS
INSTALLATION
1 ENGINEERING INSTALLATION FLOWCHART
2. PREPARATIONS
3 INSTALLATION OF THE SPLIT TYPE UNIT OF WATER HEATER
4 INSTALLATION OF THE INTEGRAL TYPE UNIT OF WATER HEATER
5 REFRIGERANT PIPE DESIGN OF THE SPLIT TYPE UNIT
6 PIPE INSTALLATION AND INSULATION
7. ELECTRIC INSTALLATION
8. INSTALLATION OF COMMUNICATION SYSTEM
9. REFRIGERANT PERFUSION
10. CHECK FOR ACCEPTANCE AFTER INSTALLATION
COMMISSIONING AND TRIAL RUN
1 COMMISSIONING FLOWCHART
2 PRECAUTIONS ON SAFETY
3 PREPARATIONS
4 COMMISSIONING AND TRIAL RUN
5 CHECK BEFORE ACCEPTANCE
6 UNIT FUNCTION SETTING
MAINTENANCE
1 FAULT CODE
2 TROUBLESHOOTING
3 REPAIR OF KEY COMPONENTS
4 EXPLODED VIEW AND PARTS LIST
UNIT MAINTENANCE
1. WATER REPLENISHMENT FOR THE WATER TANK
2. REGULAR CLEANING FOR THE WATER TANK
3. SAFETY CHECK VALVE MAINTENANCE
4. MAINTENANCE OF THE UNIT
ATTACHMENT: MAPPING TABLE OF THE TEMPERATURE SENSOR RESISTANCE AND
TEMPERATURE

AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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PRODUCT

AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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PRODUCT
1 MODELS LIST
Product type - Model Product code
Heating
capacity(W)
Outline diagram
Split type
Water tank SXD200LCJW/C1-K ER20000320
2800+1500
(electric
heating)
Outdoor unit GRS-S3.0G/NbA-K ER02000130
Product type Model Product code
Heating
capacity(W)
Outline diagram
Integral type GRS-2.4/D270ANbA-K ER02100050
2400+1500
(electric
heating)
Notes:
The above table lists specifications of the air source water heater series product for static heat up.
The product standard is EN16147-2011, (EU) No 814/2013, EN 12102-2008.
Conditions for testing heating capacity of the unit: outdoor ambient temperature: 20 DB/15 WB;
Initial/ending water temperature in the water tank: 15 /55 .
For units with a water tank equipped with an electrical heater, that is, the water tank model of which
includes D , both the heat pump and electrical heater are started for heat up under low ambient
temperature or rapid mode.
If the product specification changes with product improvement, refer to the parameter specified on
the nameplate.

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2 NOMENCLATURE
2.1 Nomenclature of split type unit
G RS - S 3.0 G / Nb A - K
1 2 3 4 5 6 7 8
NO. Description Options
1 GREE G
2 Heat Pump Water Heater RS
3 Heating style S = Static, C = Circulating
4 Heating Capacity 2.8kW
5 Water Tank Capacity E=100L,F=150L,G=200L,H=250L
6 Refrigerant Nb = R134a, Default = R22
7 Design Serial Number A
8 Power style 220-240V-1Ph 50Hz
2.2 Nomenclature of integral type unit
G RS - 2.4 / D 270 A Nb A - K
1 2 3 4 5 6 7 8 9
NO. Description Options
1 GREE G
2 Heat Pump Water Heater RS
3 Heating Capacity 2.4kW
4 Function code Null for no electric heating function;
D with electric heating function
5 Water Tank Capacity 270L
6 Design code
A LCJW: floor standing type; outer
coil pipe
static heating type;
B BCJW: wall-mounted type; outer
coil pipe
static heating type;
C LCJ: floor standing type; built-
in coil pipe
static heating type;
D BCJ: wall-mounted type; built-
in coil pipe
static heating type;
7 Refrigerant Nb = R134a, Default = R22
8 Design Serial Number A
9 Power style 220-240V-1Ph 50Hz
3 FUNCTION
No. Name Function
1 Compressor Increases pressure for the refrigerant and provides driving force for
circular flow of the refrigerant as a main driving component.
2 Four-way valve Reverses flow direction of the refrigerant when the system switches
between the normal heat up mode and defrosting mode.
3 Water tank Provides heat exchange channel for refrigerant and water and stores
hot water for daily use.
4 Electronic
expansion valve
Speeds up high-pressure and high-temperature refrigerant and
reduces pressure and adjusts the circulation amount of coolant.

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5 Finned tube
exchanger Provides heat exchange channel for refrigerant and air.
6 Fan motor Enhances heat exchange on the air side of the finned tube exchange
and provides a low-temperature heat source continuously.
7 Filter Filters impurities in refrigerant to protect components with small
diameter.
4 PRODUCT PARAMETERS
4.1 Product Parameters of Split type unit
4.1.1 Product Parameters of Outdoor Unit
Model GRS-S3.0G/NbA-K
Product code - ER02000130
Rated Heating Capacity(*) W 2800
Rated Input Power(*) W 700
COP(*) W/W 4.00
Load Profile - L
COPDHW
(**) W/W 2.90
Energy Efficiency Class(**) - A
Water Heating Energy Efficiency(**) - 110%
Annual electricity consumption
(average climate conditions) kWh 878
Maximum Input Power W 1180+1500W (Electric Heater)
Outlet Water Temperature Default: 55 , 35 ~70
Power Supply - 220V-240V ~50Hz
Insulation Level -
Protection of Ingression - PX4
Refrigerant Name R134a
Charge kg 1.20
Outline Dimensions W x D x H mm
Package Dimensions W x D x H mm
Net Weight kg 35.5
Sound Power Level(***) dB(A) 61
Operating Range -7~45
Notes:
(*) Value obtained
(**) , as per EN16147, (EU)
No 814/2013.
(***) Value obtained as per EN 12102-2008.
Under fast water heating mode, electric heater helps to heating water.
Please always see the nameplate for the exact data as this table is subject to change.

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4.1.2 Parameters of the Water Tank
Coil water tank
Model
Product
code Capacity
Power
Supply to
E-heater
Heating
Power of
E-heater
Dimensio
ns
Net
Weig
ht
Size of Pipe
Between
the Main
Unit and
Water Tank
Coolant
Size of
Pipe at
the Water
Acquisitio
n Position
- L - W mm kg mm mm
SXD200LCJW/C1-
K
ER20000
320 185 220V-240V ~50Hz 1500 545 x 545 x 1919 52 DN15
Notes:
Type selection of water tank shall also be made based on local climatic conditions and opinions from
professionals.
For units with a water tank equipped with an electrical heater, that is, the water tank model of which
starts with SXD, both the heat pump and electrical heater are started for heat up under low ambient
temperature or rapid mode.
If the specification parameters change with product improvement, refer to the parameter specified
on the nameplate.
4.2 Product Parameters of Integral type unit
Model GRS-2.4/D270ANbA-K
Product code - ER02100050
Rated Heating Capacity(*) W 2400
Rated Input Power(*) W 685
COP(*) W/W 3.50
Capacity L 270
Load Profile - XL
COPDHW
(**) W/W 2.58
Energy Efficiency Class(**) - A
Water Heating Energy Efficiency(**) - 105%
Annual electricity consumption
(average climate conditions) kWh 1594
Maximum Input Power W 1300+1500W (Electric Heater)
Outlet Water Temperature Default: 55 , 35 ~70
Power Supply - 220V-240V ~50Hz
Insulation Level -
Protection of Ingression - PX4
Refrigerant
Name R134a
Charge kg 1.10
Outline Dimensions W x D x H mm 660 67
Package Dimensions W x D x H mm
Net Weight kg 114

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Sound Power Level(***) dB(A) 58
Operating Range -7~45
Notes:
(1) (*) Value obtained with the following conditions: Outdoor temperature: 20 DB/15 WB; Water tank
temperature (start/end): 15 /55 .
(2) (**)Value obtained with an air temperature of 7 and a water inlet at 10 , as per EN16147-2011,
(EU) No 814-2013.
(3) (***) Value obtained indoor placement, with 2m long inlet and outlet wind duct, as per EN 12102-2008,
(EU) No 814-2013.
(4) The installation of suction and backflow conduits on the heat pump lessens its performance.
Under RAPID function, electric heater helps to heating water.
Please always see the nameplate for the exact data as this table is subject to change.
4.3 Work Temperature Range
Models
GRS-S3.0G/NbA-K GRS-2.4/D270ANbA-K
Heating -7~45 -7~45
Note: The above value range indicates the outdoor ambient temperate range for normal operation of
the unit. For details on the configurable range of water temperature, see the nameplate of the water
tank.
5 Working Principle
5.1 Brief Introduction to Working Principle
As the refrigerant has different phase-transition temperature under varied pressure, it enables the
heat pump to transfer heat of low-temperature heat source to the high-temperature heat source. The air
source water heater unit utilizes the heat pump to obtain heat from the ambient low-grade energy (air
source) via thermodynamic cycle by consuming partial electrical energy, and then delivers heat to the
water tank for heating up water.
5.2 Working Diagram
5.2.1 Working Diagram
Energy obtained for water heating Q3 = Input electric
energy Q1 + Heat absorbed from environment Q2

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The compressor consumes partial electrical energy to compress the refrigerant into
high-temperature and high-pressure gas. After entering the condenser (the water tank coil of a water
heater in static heat up mode), the gaseous refrigerant transfers its heat to water as its saturation
temperature is higher than the water temperature and leaves the condenser after condensing into liquid.
The liquid refrigerant enters the throttling device (generally the electronic expansion valve) for speedup
and pressure reduction. As partial liquid vaporizes, the liquid refrigerant has two states (gas and liquid)
when leaving the throttling device. The low-pressure refrigerant enters the vaporizer (the finned tube
exchanger of a water heater in static heat up mode) and is vaporized into liquid after absorbing heat from
air as its saturation temperature is lower than the air temperature. The low-pressure gas is inhaled by the
compressor for the next cycle.
6 Optional Accessories
The Gree air source water heater unit supports the following accessories:
Item Model Remark
Intelligent preheat water return device
(transient heat up module) HS-01
Self-regulation heating belt 76612816
Pressure stabilizing valve 07382812
Note:
(1) If any of the preceding accessories is required, contact with the local sales company.
(2) GRS-2.4/D270ANbA-K unit can not connect Intelligent preheat water return device.

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CONTROL

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CONTROL
1 Unit Control
1.1 Overall Control Logic
1) High pressure switch
When the detected voltage exceeds the preset value, a fault will be displayed and the unit will stop
or not start.
2) Temperature sensor fault detection and handling
Once the temperature sensor for the ambient temperature, air discharge, air inhaling, pipe
temperature, or water tank is open-circuited or short-circuited, the corresponding fault code will be
displayed and all loads will be cut off. After the fault is rectified, the unit automatically runs again.
1.2 Key Control Logics
1) Control on compressor
After power is connected, start the system by the manual operator and detect the outdoor ambient

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temperature sensor. If the outdoor ambient temperature is not lower than -7
detected and start up conditions of the compressor are met, the system starts by following the hot water
sequence.
2) Control on fan motor
When start up conditions of the compressor are met, the system starts by following the hot water
sequence. The electronic expansion valve resets and is initialized, and the external fan motor starts.
After 10s, the compressor starts. The fan motor will determine whether to still run at high level or to run at
low level based on the ambient temperature after it runs at high level. If the system enters overload
control, the fan motor will switch to discontinuous start up and shutdown status at low level.
3) Control on defrosting
When the compressor is initially powered on and started, it determines the defrosting condition after
running for the preset duration. If the defrosting condition is met, the system defrosts before running in
hot water mode (including freeze-proofing operation of compressor). After defrosting is over, the
compressor starts for heat up. When the cumulative operation time exceeds or equals to the preset time
for defrosting, defrosting will be performed if the relation between the outdoor exchanger pipe
temperature sensor Th and the outdoor ambient temperature sensor Te meets the defrosting condition.
4) Control on water return pump
The water return pumps runs in automatic or manual control mode as set by users. In automatic
control mode, the water return pump is control based on temperature of the return pipe thermo-bulb. In
manual control mode, the return pump is stopped after water return is complete.
Notes: GRS-2.4/D270ANbA-K unit have not the function.
5) Control on freeze-proofing function
In the Off state, if water temperature in the water tank detected by the system based on the ambient
temperature is too low, the unit starts the freeze-proofing function immediately.

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2 Wired Controller
1 i-know button 2 Timer button 3 Function button 4 Rapid button
5 Mode button 6 Increase button 7 On/Off button 8 Decrease button
1
Display of Common Operation
Modes:
HOTWATER, SAVE, PRESET and
NIGHT mode.
6
Display of defrost, antifreeze running, and
e-heater running (or display of the Special
E-HEATER Mode).
2 Display of RAPID and i-KNOW
function. 7
Display of hot water volume (this function is
unavailable to models with single temperature
sensor).
3
Display of CYCLE, STERILIZE,
SUNFLOWER, ABSENCE,
VACATION, and ONCE function (the
STERILIZE function may not work
for models without an electrical
heater).
8 Display of operating/standby.
4 Display of Keypad Lock function. 9
Display of actual water temperature,
temperature setpoint, error codes, and
running parameters.

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5
Display of system time, preset time,
timer setting and running
parameters.
10 Display of the sub-controller. (This function is
reserved.)
3 Query Parameters
This function is provided for the debugging personnel to query running status of the unit. After
pressing and holding MODE+ button for 5s, the parameter display area blinks. 00 is displayed by
default. The buttons can be pressed to switch the query item.
Query codes are described in the following table.
Query Code Query Parameter
00 00 by default
01 Communication protocol version
02 Temperature of the temperature sensor for water outlet pipe
03 Temperature of the upper temperature sensor of the water tank (detected by the
mainboard)
04 Temperature of the outdoor ambient temperature sensor
05 Reserved
06 Temperature of the air intake temperature sensor
08 Temperature of the air exhaust temperature sensor
13 Temperature of the temperature sensor for outdoor pipe
16 Temperature of the water temperature sensor
17 Display of single or dual temperature sensor (01 indicates single temperature sensor
and 02 indicates dual temperature sensor)
18 Temperature of the middle temperature sensor of the water tank (part of units have the
temperature sensor)
19 Temperature of the upper temperature sensor of the water tank

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4 Operation Instructions
4.1 On/Off Setting
Note: After energization and under normal communication, the LCD will display the water
temperature, time, and hot water volume (for models with dual temperature sensor) under both On and
Off states of the unit. It means the Off state if the LCD does not display the running mode, as shown in
the following figure.
4.2 Common Modes Setting
In the On state of the unit, press the MODE button to switch the operation modes in the following
sequence:
HOTWATER SAVE PRESET NIGHT
The HOTWATER mode is shown in the following figure.
4.3 Special Modes Setting
If the heat pump of a water heater equipped with an electrical heater is faulty, users can press and
hold MODE+RAPID for 5s in any mode under the state to enter the E-HEATER mode.
Note: The E-HEATER mode can be used only when the heat pump is faulty. In this case, contact the
aftersales service immediately.
The E-HEATER mode is shown in the following figure.

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In the E-HEATER mode, users can press the MODE button to switch to the HOTWATER mode.
Note that the E-HEATER mode will be cancelled automatically and the HOTWATER mode will be started
upon restart of the water heater in the case of blackout.
4.4 Water Temperature Setting
In the On state,
The minimum temperature setpoint for all models The maximum temperature setpoint can
4.5 Time Setting
4.5.1 System Time Setting
In the main interface, press and hold the TIMER button for 5s. The system time setting interface is
displayed. The clock icon is on and the hour value blinks. Press to adjust the hour value and
press the TIMER button to confirm setting. Then the minute value flickers. Press to adjust the
minute value and press the TIMER button to confirm setting. After system time setting is saved, the main
interface is displayed. In the setting process, if no button is pressed within 15s, the main interface will be
displayed and setting will not be saved.
decreases by 1 hour or 1 minute. When the button is pressed and held, the time increases or decreases
The setting process is shown in the following figure.
Main interface
Hour value of the
system time
blinks.
Minute value of
the system time
blinks.
Press and hold the
TIMER button.
Press the TIMER
button.
Press the TIMER
button.
Setting is
complete.

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4.5.2 Timer Setting
Timer setting: Under the HOTWATER or SAVE mode or under the Off state, press the TIMER
button to enter the timer setting interface. The TIMER and ON icons are on and the hour value blinks.
Press to adjust the hour value and press the TIMER button to confirm setting. Then the minute
value flickers. Press to adjust the minute value and press the TIMER button to confirm setting.
Then the OFF icon is on and ON icon is off. The hour value blinks. Press to adjust the hour
value and press the TIMER button to confirm setting. Then the minute value flickers. Press to
adjust the minute value and press the TIMER button to confirm setting. After the scheduled on/off time
setting is saved, the main interface is displayed. In the setting process, if no button is pressed within 15s,
the main interface will be displayed and setting will not be saved.
Timer cancelling: After the scheduled on/off time is set, press the TIMER button to cancel it.
Note: The scheduled on time and off time cannot be the same; otherwise, the LCD switches to the
interface for resetting the timer.
Main interface
Timer is on and
the hour value
blink.
Timer is on and
the minute value
blink.
Press the
TIMER button.
Press the
TIMER button.
Timer is off and
the hour value
blink.
Press the
TIMER button.
Timer is off and
the minute value
blink.
Cancel the timer.
Setting is
complete and the
timer is started.

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4.5.3 Preset Time Setting
In the PRESET mode, hot water is prepared in advance by the preset time.
In the main interface of the PRESET mode, press the TIMER button to enter the selection interface.
PRESET 1 blinks while PRESET 2 and PRESET 3 are not displayed. Press and the LCD blinks
circularly in the flowing sequence: PRESET 1 PRESET 2 PRESET 3 PRESET 1.
Preset time setting: Press the TIMER button to select PRESET 1. Then the PRESET 1 icon is on
and the hour value blinks. Press to adjust the hour value and press the TIMER button to confirm
setting. Then the minute value flickers. Press to adjust the minute value and press the TIMER
button to confirm setting. After time setting for PRESET 1 is saved, the main interface is displayed.
PRESET 2 or PRESET 3 setting: Press the TIMER button to select PRESET 2 and then the ON
icon blinks. Press to switch the ON and OFF icons. When the ON icon blinks, press the TIMER
button. Then the PRESET 2 icon is on and the ON icon is off. The hour value blinks. Press to
adjust the hour value and press the TIMER button to confirm setting. Then the minute value flickers.
Press to adjust the minute value and press the TIMER button to confirm setting. After time
setting for PRESET 2 is saved, the main interface is displayed. The method for setting PRESET 3 is the
same as that for PRESET 2. (After setting is saved, the ON and OFF icons are not displayed in the main
interface as these icons are available in the setting process.)
In the time presetting process, if no button is pressed within 15s, the preset interface will switch to
the main interface automatically and setting will not be saved.
If the time preset for PRESET 1, PRESET 2, and PRESET 3 is the same, it is regarded as one
timer.
The preset time can be memorized. If the preset time does not need to be reset, users only need to
select on or off.
Preset time cancelling: After time is preset for PRESET 2 or PRESET 3, users can press the
TIMER button to display the selection interface. The icon of PRESET 2 blinks. Press and the
LCD blinks circularly in the flowing sequence: PRESET 2 PRESET 3 PRESET 1 PRESET 2. Select
PRESET 2 and press the TIMER button. Select to cancel PRESET 2. Then the PRESET 2 icon is on and
the ON icon blinks. Press to select OFF. Press the TIMER button to confirm cancelling and
return to the main interface. The method for cancelling preset time for PRESET 3 is the same as that for
PRESET 2. Preset time for PRESET 1 cannot be cancelled. If users select PRESET 1, the time setting
interface will be displayed.

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Main interface PRESET 1
blinks.
The ON icon
blinks.
Press the
TIMER button.
Press or to select
PRESET X
The hour value
of PRESET X
blinks.
Press the
TIMER button.
The minute
value of
PRESET X
blinks.
Press the TIMER button.
The OFF icon
blinks.
PRESET 1 or
PRESET 3
blinks.
Setting is complete
and PRESET X is
canceled.
Setting is
complete and
PRESET X is
started.
The PRESET mode runs circularly. The water heater starts to heat up water based on the preset
time and ambient temperature and stops one hour after the preset time.
4.6 Function Setting
4.6.1 i-KNOW
In the On state, press the i-KNOW button to select the i-KNOW function. To cancel this function,
press the i-KNOW button again.
4.6.2 RAPID
In the On state, press the RAPID button to select the RAPID function. The electrical heater is
started for heat up. To cancel this function, press the RAPID button again. Then electrical heater is
stopped.
Under the E-HEATER mode, users can press the RAPID button to switch to the HOTWATER mode.
To return to the E-HEATER mode, press the RAPID button again.

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4.6.3 CYCLE, SUNFLOWER, ABSENCE, and ONCE
In the On state, press the FUNCTION button to enter the interface for selecting among the CYCLE,
SUNFLOWER, ABSENCE, and ONCE functions. When a function is selected, the corresponding icon
blinks. Then users can press to start or cancel this function. If no operation is performed within
5s, it will be regarded that this function is not required. If this function is started, the function icon is
displayed without blinking. If this function is cancelled, the function icon will not be displayed. If no
function is selected in setting interface for 5s, the interface switches back to the original status.
4.6.4 STERILIZE
The STERILIZE function is available under four common modes. However, after this function is set,
the unit runs as under the HOTWATER mode. The water heater controls startup and shutdown of the
unit based on the difference between the actual water temperature and that required for sterilization.
In the On state and in a common mode, press the FUNCTION button to enter the function selection
interface. When the STERILIZE function is selected, the corresponding icon blinks. At the same time, the
preset circular sterilization duration is displayed as d:XX, as shown in the following figure.
During this period, the following operations can be performed:
1) Press to start or cancel the STERILIZE function. If this function is started, the STERILIZE
icon is displayed without blinking. Sterilization will be performed circularly by the preset d and h value; If
this function is canceled, the STERILIZE icon is not displayed. If no operation is performed within 5s, it
will be regarded that this function is not required. After this function is started and when sterilization is
being performed, the function icon blinks.
2) Press the TIMER button to enter the sterilization parameter setting interface. Press to
select the d value and then press the TIMER button to confirm the value. When the confirmed d value is
not 0, the h value setting interface is displayed. Press to select the h value and then press the
TIMER button to confirm the value. When the STERILIZE icon is displayed, the STERILIZE function is
started. If the STERILIZE icon blinks, the preset h value (time point for sterilization) is achieved and
sterilization is being performed.
Sterilization Parameter Meaning Range
d value Day interval for circular
sterilization
0-10 days; 0 indicates sterilization for once only
and the sterilization function will be canceled after
being performed.
h value Time point for circular
sterilization 00:00-23:00