Gree HLR35SM/NaA-M User manual

Modular Mini Chiller Service Manual
（T1/R410A/50Hz）
GREE ELECTRIC APPLIANCES INC. OF ZHUHAI

GREE COMMERCIALAIR CONDITIONERS MODULAR MINI CHILLER
2
CONTENTS
PRODUCT INTRODUCTION.......................................................................................................................4
1MODELS LIST .........................................................................................................................................4
1.1 Integral Type ....................................................................................................................................4
2NOMENCLATURE ..................................................................................................................................4
2.1 Integral Type ....................................................................................................................................4
3FUNCTION...............................................................................................................................................4
4PRODUCTDATA .....................................................................................................................................5
4.1 Product Data at Rated Condition..................................................................................................5
4.2 Operation Range.............................................................................................................................6
4.3 Electrical Data .................................................................................................................................6
5PIPING DIAGRAM ..................................................................................................................................6
UNITS CONTROL .........................................................................................................................................8
1OPERATION FLOWCHART....................................................................................................................8
1.1 Cooling Operation...........................................................................................................................8
1.2 Heating Operation...........................................................................................................................9
2MAIN LOGIC .........................................................................................................................................10
2.1 Cooling Mode ................................................................................................................................10
2.2 Heating Mode ................................................................................................................................10
2.3 Anti-freezing Running...................................................................................................................11
2.4 Control of Compressor.................................................................................................................11
2.5 Control of Four-way Valve ...........................................................................................................11
2.6 Control of Water Pump.................................................................................................................11
3WIRED REMOTE CONTROLLER........................................................................................................12
3.1 Function..........................................................................................................................................12
3.2 Operation View..............................................................................................................................12
3.3 Display View ..................................................................................................................................13
3.4 Wired Controller Operation Instructions ....................................................................................13
3.5 Controller Menu Structure............................................................................................................26
4. SKETCH MAPOF DIP SWITCH ..........................................................................................................27
UNITS INSTALLATION ..............................................................................................................................29
1UNITS INSTALL....................................................................................................................................29
1.1 Installation Positions.....................................................................................................................29
1.2 Matters need Attention .................................................................................................................29
1.3 Dimension Data.............................................................................................................................29
1.4 Installation Clearance Data .........................................................................................................30
2WATER PIPING WORK .........................................................................................................................31
2.1 Installation Procedure...................................................................................................................31
2.2 Matters of Attention.......................................................................................................................31
2.3 Antifreeze .......................................................................................................................................31
3ELECTRICWIRING WORK..................................................................................................................31
3.1 Wiring Principle .............................................................................................................................31
3.2 Electrical Wires are Connected with Consumers.....................................................................32
3.3 Specification of Power Cord & Air Switch..................................................................................32
3.4 Wiring Diagram..............................................................................................................................33
UNITS MAINTENANCE..............................................................................................................................35
1TROUBLETABLE .................................................................................................................................35
2FLOW CHART OF TROUBLESHOOTING...........................................................................................37
3DISASSEMBLYANDASSEMBLYPROCEDURE OF MAIN PARTS.................................................41
3.1 Integral Type ..................................................................................................................................41
4EXPLODED VIEWAND PARTS LIST..................................................................................................43
4.1 Exploded View and Parts List- Integral Type ............................................................................43

MODULAR MINI CHILLER PRODUCT
3
PRODUCT

MODULAR MINI CHILLER PRODUCT
4
PRODUCT INTRODUCTION
1 MODELS LIST
1.1 Integral Type
Model Nominal
Capacity
Power
Supply
Refrigerant Model Name kW (V,Ph,Hz)
Appearance
HLR35SM/NaA-M 35
R410A
HLR45SM/NaA-M 45
380∼415V,
3Ph, 50Hz
Note:1Ton =12000Btu/h = 3.517kW
2 NOMENCLATURE
2.1 Integral Type
HL R 35 S MNa - M
1 2 3 4 56 7
NO. Description Options
1 Mini chiller -
2 Product type R=Heat pump
3 Nominal Cooling Capacity 35=35kW
45=45kW
4 Refrigeration Circuits
Default=One circuit
S=Twin circuit
5 Module -
6 Refrigerant Na=R410A, Default=R22
7 Voltage
M=380∼415V 3Ph 50Hz
3 FUNCTION
Indoor Unit Type Function Description
Integral Type Heating/Cooling
Interface kit for up to 16 indoor
units
Memory restart
Two circuits optimized design
Low noise design
Safety and reliability thanks to
advance compressor balance
control

MODULAR MINI CHILLER PRODUCT
5
4 PRODUCT DATA
4.1 Product Data at Rated Condition
4.1.1 Integral Type
HLR SM/NaA-M
Models
35 45
kW 31 42
Btu/h 105772 143303
Cooling
RT 8.8 11.9
kW 36 49
Btu/h 122832 167187
Capacity
Heating
RT 10.3 13.9
Cooling kW 11.9 18.3
Power input
Heating kW 12.5 17.5
Power Supply 380~415V,3Ph,50Hz
Safeties Auto air evacuation valve
Safety valve;
Auto water replenishing valve;
Auto air evacuation valve
Type R410A
Refrigerant
Charge kg 6.5X2 7.3X2
Type scroll
Compressor
NO. 2 2
Heat Exchanger Shell and tube Shell heat exchanger
Evaporator Water In/Out
Pipe
Diameter
inch 1-1/2”
Heat Exchanger Aluminum fin-copper tube Fin sleeve Heat exchanger
Condenser Fan Motor
Power Input kW 0.6 0.8
L/s \ 2.2
Water Flow
GPM \ 29
Delivery Lift m \ 27
Pump
Power Input kW \ 1.5
Expansion Vessel Volume L \ 8
Outline(WxDxH) mm 1750×800×1760 1750×800×1760
Dimension
Packaged(WxDxH) mm 1910×960×1970 1910×960×1970
Net/Gross Weights kg 600/610 755/765
NOTE：
1、Cooling capacity is based on the following conditions：leaving chilled water temp.7 ,outdoor air temp.35℃℃
2、Heating capacity is based on the following conditions：leaving warmed water temp.45 , outdoor air℃
temp.7℃
3、Water flow range for operation must be from 70% to 120% of the rated water flow。
4、The maximum allowable pressure for water pipe is 0.9MPa

MODULAR MINI CHILLER PRODUCT
6
4.2 Operation Range
Mode Range of Outdoor Temperature℃(℉)
Cooling 16~48
Heating -15~28
4.3 Electrical Data
4.3.1 Integral Type
Compressor Fan Motor Total
Model Rated Power
Supply
NO.
LRA
each
（A）
MRC
each
（A）NO. MRC
（A）
MRC
（A）
NRC
（A）
HLR35SM/NaA-M 380~415V 3Ph
50Hz 2 101 17.3 2 1 36.6 26.3
Notes:
LRA: Locked rotor amps (A)
MRC: Maximum running current (A)
NRC: Nominal running current (A)
5 PIPING DIAGRAM
Heating circuit
Cooling circuit
Pump
Relief
valve
Flow
switch
Expansion
drum
High pressure
tank
Aluminum fin-copper tube
coil
Four-way valve
Shell and tube heat
exchanger
Inlet
Outlet
High-pressure
switch
Compressor
Low-pressure
switch
Liquid-gas separator
F

GREE COMMERCIALAIR CONDITIONERS MODULAR MINI CHILLER
7
CONTROL

MODULAR MINI CHILLER CONTROL
8
UNITS CONTROL
1 OPERATION FLOWCHART
1.1 Cooling Operation

MODULAR MINI CHILLER CONTROL
9
1.2 Heating Operation

MODULAR MINI CHILLER CONTROL
10
2 MAIN LOGIC
2.1 Cooling Mode
2.1.1 Control of Compressor
（1）Start-stop Control--- “first start, first stop; first stop, first start”
During running of the unit, the compressor is numbered instantly. It is controlled according
to the principle of “first start, first stop; first stop, first start”.
（2）Water Temperature Drop (Rise) Rate Control
The water temperature interval is the main control, while the temperature drop (rise) rate is
the auxiliary control. This can adapt to the load variation of the terminal, keeping water
temperature stable and avoiding fierce variation. In this control mode, the system is based on
the temperature and temperature drop rate: when the water temperature is too high and if the
temperature drop is rapid, it means the output load is bigger than the terminal load. In that
case, it is not necessary to startup the other compressor. The temperature interval and
temperature drop is decided by experience, other theories and test so that the water
temperature can be kept stable and frequent stop can be avoided.
2.1.2 Anti-freezing Protection
For each module, when the anti-freezing temperature is lower than the required value for
protection, the anti-freezing protection will start then the compressor of this module will stop.
When the anti-freezing temperature is higher than the required value for resume, this system
will eliminate the anti-freezing protection.
When the anti-freezing temperature is between the above two temperature, it will not affect
the anti-freezing protection.
If the unit is low temperature unit, the anti-freezing protection is invalid.
2.1.3 Stop of the Unit
Stop the unit manually or via timer: the compressor stops and then the fan stops. After
certain control time, the water pump will stop.
Stop the unit upon reaching a temperature spots: the compressor stops and then the fan
stops (on condition that both compressor stops). The water pump will not stop.
Disorderly closedown: the compressor stops and then the fan stops (except the
malfunction of the fan). After the corresponding compressor stops for a period. The water
pump will not stop.
2.2 Heating Mode
2.2.1 Control of Compressor
The control principle is the same with that of cooling mode.
2.2.2 Superheat Protection
For each module, when the superheat temperature is higher than the required value for
protection, the superheat protection will start then the compressor of this module will stop.
When the superheat temperature is lower than the required value for resume, this system will
eliminate the superheat protection.
When the superheat temperature is between the above two temperature, it will not affect
the superheat protection.
2.2.3 Control of Auxiliary E-heater

MODULAR MINI CHILLER CONTROL
11
If the control function of auxiliary e-heater is switched on in the display board, it can be
controlled automatically according to the inflow water temperature. It is necessary to set an
interval to restart the e-heater.
When the temperature detected by inflow water temperature sensor is ≤T1, the second
group of auxiliary e-heaters will work.
When the inflow water temperature is ≥T2, the second group of auxiliary e-heaters will
stop.
When the inflow water temperature is between the above two temperature, the second
group of auxiliary e-heaters remain the original state.
When the temperature detected by inflow water temperature sensor is ≤T1+tr0, the first
group of auxiliary e-heaters will work.
When the inflow water temperature is ≥T2+tr1, the first group of auxiliary e-heaters will
stop.
When the inflow water temperature is between the above two temperature, the first group
of auxiliary e-heaters remain the original state.
After startup of the unit, the auxiliary e-heater will work after all the compressor runs for a
certain period and all the above condition is reached.
2.2.4 Stop of the Unit (subject to the stop of the compressor)
Stop the unit manually or via timer: the compressor, the auxiliary e-heater and the fan
stops in sequence. After certain setting time, the four-way valve will be de-energized and the
water pump will stop.
Stop the unit upon reaching the temperature spots: the compressor stops and then the fan
stops. The four-way valve will remain the original state and the water pump will not stop.
Disorderly closedown: the compressor stops and then the fan stops (unless the fan is
wrong). After the corresponding compressor stops for a period. The water pump will not stop
while the four-way valve will remain the original state.
2.3 Anti-freezing Running
Under the stop state of any mode (except manual defrosting mode), the automatic
anti-freezing function can be switched on via the display board. The defaulted setting of this
function is OFF.
For all the modules that reach automatic anti-freezing running condition, the compressor
will run according to the setting condition and the regulation of “run for 6min and stop for 4
min”.
2.4 Control of Compressor
All compressors run according to the principle of “first start, first stop; first stop, first start”.
For other information, refer to the control section of 1.3.1 and1.3.2.
2.5 Control of Four-way Valve
In cooling mode, the four-way valve is off. In heating mode, the four-way valve will run after
the corresponding compressor runs. In defrosting mode, the four-way valve will be off. When
eliminating the defrosting function, the four-way valve runs. When stop the unit, the four-way
valve will stop after the corresponding compressor stops.
2.6 Control of Water Pump
When any of the modules needs to be started up, all the water pumps will run. When one
module stops upon reaching certain temperature spots, all the water pumps remain running.
When one module is stopped manually or via timer or due to malfunction, the water pump of
this module remains running. Only when all the modules are stopped manually or via timer, the
water pump will stop 5 min after all the compressor stops.

MODULAR MINI CHILLER CONTROL
12
3 WIRED REMOTE CONTROLLER
3.1 Function
The display of modular air-cooled scroll chiller shows the running parameter in real time. It can
be connected with the remote control system.
3.2 Operation View
NO. Name Function description
1 Power LED (red) When the display board is energized, this LED lights;
otherwise, it is dark.
2 Running LED (green) When the display board is turned on, this LED lights; otherwise,
it is dark.
3 Error LED (red) When there is malfunction, this LED lights; otherwise it is dark.
4 ON/OFF button
Control the start or stop of the unit. Under stop state, press the
button (for 3s) to start up the unit. Under running state, press
the button (for 3s) to stop the unit.
5 RESTORE button
Press this button to remove error and lock of exhaust
temperature sensor.
6 UP button
Press this button to move the cursor upward or leftward. When
modify the data, press this button to increase the value.
7 DOWN button
Press this button to move the cursor downward or rightward.
When modify the data, press this button to decrease the value.
8 EXIT button Press this button to return to last page.
9 CONFIRM button
Press this button to enter the next page. When modify the data,
press this button to confirm the value and transfer the cursor.

MODULAR MINI CHILLER CONTROL
13
3.3 Display View
NO. Name Function description
1 Time display Display the current time.
2 Unit name Unit name
3 Running state Display the current running state of the unit.
4 Number of modules The number of connected unit
5 ON/OFF mode ON/OFF mode of the system
6 Running mode Display the current running mode
3.4 Wired Controller Operation Instructions
3.4.1 Turning on/off of the Unit
The unit under non-commissioning state can be turned on/off via the manual mode or the
timing mode. The manual mode is given priority to the timing mode.
●Manual mode：
1）、Manual start: in the unit stop state, press the on/off button for 3 seconds and start the
unit, and at that time the operation indicator is on. When the compressor begins to run
after a delay, the manual starting process is finished.
2）、Manual stop: in the unit operation state, press the on/off button for 3 seconds and
stop the unit, and at that time the operation indicator is off. When the unit stops, the
compressor immediately ceases and the cooling tower fan, the cooling pump and the
chilled water pump are shut off. The manual stop process is finished.
When ambient temperature is lower than -16℃, pressing the start/stop button, the

MODULAR MINI CHILLER CONTROL
14
following prompt window comes up on the manual operator.
Press the Confirm button for acknowledgement.
If ambient temperature sensors of all linked units are at fault, pressing the on/off button,
the following prompt window comes up on the manual operator.
Press the Confirm button for acknowledgement.
In the manual defrosting mode, pressing the on/off button, the following prompt
window comes up on the manual operator.
Press the Confirm button for acknowledgement.
By pressing the up selection button or the down selection button, you can convert
between YES and NO. Press the Exit to quit selection and go back to home page. When
the unit is in the cooling & heat recovery mode stop state, if you select YES and press the
Confirm, you can go back to the home page and the unit is in the heating & heat recovery
operation state; and if you select NO and press the Confirm, you can go back to the
home page and the unit is in the cooling & heat recovery operation state.
●Timing mode:
After the unit is energized or reset, press the Manual Mode to turn on/off the unit.
Conversion between the manual mode and the timing mode is detailed in 3.4.2.2 Main
Menu
3.4.2 Menu Operation Instructions
3.4.2.1 Home page
When the controller is powered on, the microcomputer will make a 3-second
automatic detection and the LCD on the wired controller will display the following content.
Don’t ON/OFF under
manual defrost!
OK
No ON/OFF
Under low ambient
Temp.
OK
No ON/OFF under
all ambient temp.
sensor fail!
OK

MODULAR MINI CHILLER CONTROL
15
User’sSetup
Module View
Parameter Setup
Version
RunMode 【Cool / Heat /Defrost】
Startup 【Manual/Timer】
Auxiliary Heat ON【OFF】
Auto-Antifreeze ON【OFF】▼
The content of default home page menu is dependent on system state. XX stands for
year, month, day, hour and minute. Only one item or none is displayed in the“【】”,
representing the start/stop state of the system, starting method and quantity of linked
modules. Presence of the at the end means the system is at fault.
After entering into a menu item, if no operation is made on the Wired Controller within 10
minutes, the system will automatically go back to the above default home page menu
(Home Page).
Press the Exit button on the wired controller at any time for enough times, you can go
back the default home page menu as shown above.
3.4.2.2 Main Menu
When home page is present on the screen as shown in the above drawing, press the
Confirm to enter into the Main Menu and the following items is displayed on the screen.
Press the up or down selection button to choose required function and press the
Confirm button to go to the page. Only one item or none will be displayed in 【】 in the
following graph. When a line or number is selected, it appears as white on black.
(1)、User’s Setup
The following is basic settings most common for users. On the Main menu, select the
User’s Setup and press the Confirm to go to the sub-menu, as shown in the following
drawing.
Page 1
XXXX-XX-XX X XX:XX
C Series Chiller
Cool【Heat/Defrost】On【Off】
【Manual/Timer】XModules【 】

MODULAR MINI CHILLER CONTROL
16
TimerSetup ▲
ClockSetup
Sound ON【OFF】
Backlight ON【OFF】▼
ECO.Model ON【OFF】▲
QuietModel ON【OFF】
MemoryStart ON【OFF】
Cool
Heat
Defrost
Set mode only when
unit is off!
OK
Page 2
Page 3
Press the Up or Down selection button to choose a needed function and press the
Confirm to go to or confirm the selection. The subsequent “ON” or “OFF”, which means the
function is selected or not.
a、Run Mode Set
Select the Run Mode and press the Confirm button, and the display on the screen is as
follows:
Press the Confirm button to acknowledge a selected object, press the Up or Down selection
button to change a selected object, and press the Exit button to cancel the model set.
Different models have different display modes.If you is setting a mode in the startup state, the
following prompt will appear:
Press the Confirm button for acknowledgement
b. Startup mode set
Select the Startup and press the Confirm button. The start/stop mode can be converted
between the manual mode and the timing mode.
c. Auxiliary Heater Function Set
Select Auxiliary Heat and press the Confirm button, and the subsequent “ON” or “OFF”,
which means the function is selected or not.

MODULAR MINI CHILLER CONTROL
17
TimerSetup
XXX
Timer On XX:XX ON【OFF】
Timer Off XX:XX ON【OFF】
Clock Setup
20XX-XX-XX
XX:XX
XXX
d. Auto-Antifreeze Protection Set
Select Auto-Antifreeze, press Confirm, and the subsequent “ON” or “OFF”, which means
the function is selected or not.
e. Timer Setup
Select Timer Setup and press Confirm to go to the page as shown in the following drawing:
Press Confirm to change a selected object. Press Up or Down to change value or state of a
selected object. This is timing on/off time and effective status each week. “OFF” represents the
time set is invalid and “ON” means a valid time set. Press the Exit button to quit the page and
go back to the previous menu and save set values.
f. Clock Setup
Select Clock Setup and press the Confirm button to go to the page. The following display
is present on the screen.
Press the Confirm button to change a selected object. Press the Up or Down button to
change value or state of a selected object. Press the Exit button to quit the page and go back
to the previous menu and save set values.
g. Sound On set
Select Sound, press the Confirm button, and the subsequent “ON” or “OFF”, which means
the function is selected or not.
h. Backlight On Set
Select Backlight, press the Confirm button, and the subsequent “ON” or “OFF”, which
means the function is selected or not.
I . ECO.Model Set
Select ECO.Model , press the Confirm button, and the subsequent “ON” or “OFF”, which
means the function is selected or not.
J Quiet Model Set

MODULAR MINI CHILLER CONTROL
18
Module1 EXIST【NO】
Module2 EXIST【NO】
Module3 EXIST【NO】
Module4 EXIST【NO】▼
Module5 EXIST【NO ▲
Module6 EXIST【NO】
Module7 EXIST【NO】
Module8 EXIST【NO】▼
Select Quiet Model , press the Confirm button, and the subsequent “ON” or “OFF”, which
means the function is selected or not.
K Memory Start Set
Select Memory Start, press the Confirm button, and the subsequent “ON” or “OFF”, which
means the function is selected or not. The function is for selecting whether the unit will
memorize its operation state if power supply is shut down.
(2). Module View
When the Main Menu is present on the screen, select Module View, press the Confirm
to go to the pages as shown in the following drawing.
Page 1
Page 2
Page 3
Page 4
Press the Exit to quit the page and go back to the previous menu. Press the Up or Down
button to select a needed module and press the Confirm button to go to corresponding
page.
Module9 EXIST【NO】▲
Module10 EXIST【NO】
Module11 EXIST【NO】
Module12 EXIST【NO】▼
Module13 EXIST【NO】▲
Module14 EXIST【NO】
Module15 EXIST【NO】
Module16 EXIST【NO】

MODULAR MINI CHILLER CONTROL
19
Temp.View X
State View
Error View
Manal Defrost
CWaterTin XXX.X℃
CWaterTout XXX.X℃
H Water Tin XXX.X℃
H Water Tout XXX.X℃▼
DefrostT1 XXX.X℃▲
DefrostT2 XXX.X℃
【Anti-Fre.T/Anti-HeatT】XXX.X℃
AmbientT XXX.X℃ ▼
SuctionT1 XXX.X℃▲
SuctionT2 XXX.X℃
ExhaustT1 XXX.X℃
ExhaustT2 XXX.X℃ ▼
ThrottleT1 XXX.X℃▲
ThrottleT2 XXX.X℃
A module followed with “ ”means having a failure. The following menu will display after
going to the module.
Press the Exit button to quit the page and go back to the previous menu. Press the Up or
Down selection button to select a needed function and press the Confirm to go to
corresponding page. “X”stands for one number of “1～16”, meaning number of the
selected module. The “ ”following the State View represents the module provides
auto freeze protection operation or defrosting operation. The “ ”following the Error
View represents the module is at fault.
a、Temperature View
The function is for checking temperature at various temperature points. Select Temp. View
and press the Confirm button to go to the pages as shown in the following drawings.
Page 1
Page 2
Page 3
Page 4

MODULAR MINI CHILLER CONTROL
20
Fan1 ON【OFF】
Fan2 ON【OFF】
Fan3 ON【OFF】
Sys.State 【Cool/Heat/Defrost/Anti-fre.】▼
Ass.Heat1 ON【OFF】▲
Ass.Heat2 ON【OFF】
4-Valve1 ON【OFF】
4-Valve2 ON【OFF】 ▼
EXV.1 ▲
XXX Step
EXV. 2 XXX Step ▼
Compressor1 ON【OFF】▲
Compressor2 ON【OFF】
CWaterPump ON【OFF】
HWaterPump ON【OFF】▼
Press the Up or Down selection button to convert among the above four pages. Press the
Exit button to quit the menu page and go back to the previous menu.
When page 1 is present on the screen, press the Reset button and the Exit button
simultaneously for 3 seconds, and C Water Tin and H Water Tin, as displayed previously,
will be converted to C Aver.Tin and H Aver.Tin. And press again the Reset button and the
Exit button simultaneously for 3 seconds, and C Water Tin and H Water Tin will be
displayed again. As such, display can be converted between water inlet temperature and
water inlet average temperature.
Only one item will be displayed in 【】 in page 2.When the run mode is cool or defrost,
【Anti-Fre.T/Anti-HeatT 】shows Anti-Fre.T; When the run mode is heat,
【Anti-Fre.T/Anti-HeatT】shows Anti-HeatT.
Note: above temperature display is dependent on unit model. If the temperature
sensor is not existent for a certain model, “None” would be present on the display
zone for corresponding temperature point.
b、State View
Used for checking the on/off status of motors. Select the State View and press the
Confirm to go to the pages as shown in the following drawings.
Page 1
Page 2
Page 3
Page 4