NDE Pool MASTER PLUS NDE-08-DCP Troubleshooting guide

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DC Inverter Swimming Pool Heat Pump
User and Service manual
MASTER PLUS

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INTRODUCTION:
Thank you for purchasing the “NDE Master Plus” heat pump manufactured to the highest standards.
This user and maintenance manual is a document issued by NDE GROUP in relation to the products to which it
refers, it is to be considered an integral part of the product itself for its whole life, even in case of eventual sale
to third parties, up to the demolition and disposal of the same.
All rights of reproduction and disclosure of this operating and maintenance manual and of the attached
documentation are reserved to NDE GROUP.
Any reproduction, even if partial, is prohibited.
Purposes of this manual:
Provide operators and maintenance personnel with all the necessary information and warnings so that they can
carry out their work in conditions of maximum safety.
Putting the user in a position to use the equipment correctly and safely, as well as keeping it in a state of
efficiency and safety.
IDENTIFICATION DATA:
For the design and production of the product technical rules have been used in full compliance with the safety
regulations in force.
NDE Group - SPAIN
Email: [e-mail]
www.ndepool.com
Declares to be the Supplier of the equipment and to be the contact person for any technical assistance
operations of a maintenance nature and / or modification of the equipment.
If the explanations given here are not clear or incomplete, and one or more parts of the manual itself are not
perfectly understandable, it is necessary to contact the Supplier to obtain all the necessary additional
information; if the Supplier finds the actual need, it undertakes to provide a new manual enriched with the
clarifications.
In order to obtain the best performance of the product, it is recommended to strictly follow the instructions
contained in this manual which must be carefully read and understood in its entirety; the indications concerning
the use of the equipment must be carried out in an absolutely precise manner according to what is specified
below.
This manual is strictly technical in nature, therefore exclusively owned by NDE GROUP that all rights are
reserved; any reproduction, even if partial, is forbidden according to the law.

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Pool Heat Pump
User and Service manual
INDEX
1. Specifications
2. Dimension
3. Installation and connections
4. Accessories
5. Electrical Wiring
6. Display Controller Operation
7. Running data setting
8. Troubleshooting
9. Maintenance
10.WIFI Controller Function Specification

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Thank you for using swimming pool heat pump for your pool heating, it will heat your pool
water and keep a constant temperature when the ambient air temperature is between -15 to
43ºC.
ATTENTION:This manual includes all the necessary information about the use and
the installation of your heat pump.
The installer must read the manual and attentively follow the instructions of implementation
and maintenance.
The installer is responsible for the installation of the product and should follow all the
instructions ofthe manufacturer and the regulations in application. Incorrect installation against
the manual implies the exclusion of the entire guarantee.
The manufacturer declines any responsibility for the damage caused to people, objects and
for errors due to the installation against the manual. Any use that isn’t in accordance with the
origin of its manufacturing will be regarded as dangerous.
WARNING：
Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources (for
example: open flames, an operating gas appliance or an operating electric heater.)
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
Appliance shall be installed, operated and stored in a room with a floor area larger than 20 m2.
NOTE The manufacturer may provide other suitable examples or may provide additional
information about the refrigerant odour.
WARNING: Please empty the water in heat pump always during winter time or when the
ambient temperature drops below 0ºC or else the Titanium exchanger will be damaged
because of being frozen, in such case, your warranty will be lost.
WARNING: Please always cut the power supply if you want to open the cabinet to reachinside
the heat pump, because there is high voltage electricity inside.
WARNING: Please keep the display controller in a dry area, or close the insulation cover to
protect the display controller from being damaged by humidity.

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1. Specifications
1.1 Technical data
Product model
NDE-08-DCP
NDE-10-DCP
NDE-11-DCP
NDE-14-DCP
Advised pool volume
（m3）
(with cover)
15~30
20~40
25~50
30~60
Operating ambient temperature range（℃）
-7 ~43
Parameters
heating*
Heating capacity
(kW)
7.50~1.92
9.50~2.10
11.00~2.50
14.00~3.15
Heating capacity (BTU/h)
25500~6528
32300~7140
37400~8500
47600~10710
Input power (kW)
1.15~0.13
1.46~0.14
1.83~0.17
2.15~0.21
COP
6.5~14.8
6.5~15.0
6.0~14.7
6.5~15.0
COP at 50% capacity
10.50
11.00
11.00
10.50
heating**
Heating capacity
(kW)
5.80~1.42
7.2~1.50
8.5~1.65
10.7~2.40
Heating capacity (BTU/h)
19720~4828
24480~5100
28900~5610
36380~8160
Input power (kW)
1.15~0.20
1.43~0.21
1.77~0.23
2.12~0.34
COP
5.0~7.1
5.0~7.2
4.8~7.2
5.0~7.1
COP at 50% capacity
6.50
6.50
6.50
6.50
Rated current(A)
5.1~0.9
6.3~0.9
7.8~1.0
9.3~1.5
Minimum fuse current (A)
10
12
15
20
Advised water flux（m³/H）
2~4
2~4
3~5
4~6
IP Grade (Level of protection)
IPX4
IPX4
IPX4
IPX4
Anti-electric shock Rate
I
I
I
I
Nosie
Noise (dB(A)) (1m)
38~48
38~48
40~50
42~51
Sound pressure of 50%
capacity at 1m dB(A)
40
40
41
43
Sound pressure at 10m dB(A)
18~25
18~25
19~26
22~27
Net weight/Gross weight(kg)
62/70
62/70
64/72
77/87
Diameter of pipe (mm)
φ50
Standard Configuration
Metal plate
ABS plastic casing black color
Body size(W*D*H)mm
1000X396X640
Compressor
Panasonic
Refrigerant consumption（g）
R32/350g
R32/380g
R32/450g
R32/550g
Power supply
220V/1p/ 50Hz/60HZ
Condenser
Titanium in PVC
Controller
Single System（CHICO）
Power line connect with unit
3*1.5mm2
3*1.5mm2
3*2.5mm2
3*2.5mm2
Remark:heating*: working condition, Inlet water temperature 26℃, Outlet water temperature 28℃, Dry bulb temperature
27℃.Humidity 80%.
heating**: working condition, Inlet water temperature 26℃, Outlet water temperature 28℃, Dry bulb temperature
15℃.Humidity 70%.

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Product model
NDE-17-DCP
NDE-20-DCP
NDE-24-DCP
Advised pool volume（m3）(with cover)
40~75
55~100
60~110
Operating ambient temperature range（℃）
-7 ~43
Parameters
heating*
Heating capacity (kW)
17.00~3.75
20.00~4.00
24.00~4.80
Heating capacity (BTU/h)
57800~13090
68000~13600
81600~16320
Input power (kW)
2.62~0.25
3.33~0.27
4.00~0.32
COP
6.5~15.0
6.0~14.8
6.0~15.0
COP at 50% capacity
11.00
11.00
11.00
heating**
Heating capacity (kW)
13.0~2.65
15.6~2.85
18.7~3.42
Heating capacity (BTU/h)
44200~9010
53040~9690
63580~11630
Input power (kW)
5.0~7.4
3.25~0.40
3.89~0.49
COP
4.56-7.19
4.8~7.0
4.8~7.0
COP at 50% capacity
6.50
6.50
6.50
Rated current(A)
11.3~1.6
14.3~1.8
17.8~2.3
Minimum fuse current (A)
22
30
35
Advised water flux（m³/H）
6~9
8~10
9~12
IP Grade (Level of protection)
IPX4
IPX4
IPX4
Anti-electric shock Rate
I
I
I
Noice
Noise (dB(A)) (1m)
43~52
43~53
44~54
Sound pressure of 50%
capacity at 1m dB(A)
44
44
45
Sound pressure at 10m dB(A)
23~30
24~31
25~32
Net weight/Gross weight(kg)
81/91
81/91
90/100
Diameter of pipe (mm)
φ50
Standard Configuration
Metel plate
ABS plastic casing black color
Body size (W*D*H) mm
1125X416X765
Compressor
Panasonic
Refrigerant consumption（g）
R32/750g
R32/800g
R32/850g
Power supply
220V/1p/ 50Hz/60HZ
Condenser
Titanium in PVC
Controller
Single System（CHICO）
Power line connect with unit
3*4.0mm2
3*6.0mm2
3*6.0mm2
Remark:heating*: working condition, Inlet water temperature 26℃, Outlet water temperature 28℃, Dry bulb temperature
26℃.Humidity 80%.
heating**: working condition, Inlet water temperature 26℃, Outlet water temperature 28℃, Dry bulb temperature
15℃.Humidity 70%.
* Above data are subjects to modification without notice.

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2. Dimensions
2.1 Unit mm
Model /
Units
(mm)
NDE-08-DCP
NDE-10-DCP
NDE-11-DCP
NDE-14-DCP
NDE-17-DCP
NDE-20-DCP
NDE-24-DCP
A
982
1106
B
640
764
C
396
416
D
352
378
E
630
745
F
371
391
G
187
198
H
250
300
340
J
106

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2.2 Exploded views
NDE-08/10/11/14/17/20/24-DCP

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3. Installation and connection
3.1 Notes
The factory only supplies the heat pump. All other components, including a bypass if
necessary, must be provided by the user or the installer.
Attention:
Please observe the following rules when installing the heat pump:
1. Any addition of chemicals must take place in the piping located downstream from the
heat pump.
2. Install a bypass if the water flow from the swimming pool pump is more than 20%
greater than the allowable flow through the heat exchanger of the heat pump.
3. Install the heat pump above the water level of the swimming pool.
4. Always place the heat pump on a solid foundation and use the included rubber mounts
to avoid vibration and noise.
5. Always hold the heat pump upright. If the unit has been held at an angle, wait at least
24 hours before starting the heat pump.
3.2 Heat pump location
The unit will work properly in any desired location as long as the following three items are
present:
1. Fresh air –2. Electricity –3. Swimming pool filters
The unit may be installed in virtually any outdoor location as long as the specified minimum
distances to other objects are maintained (see drawing below). Please consult your installer
for installation with an indoor pool. Installationin a windy location does not present any problem
at all, unlike the situation with a gas heater (including pilot flame problems).
ATTENTION: Never install the unit in a closed room with a limited air volume in which the air
expelled from the unit will be reused, or close to shrubbery that could block the air inlet. Such
locations impair the continuous supply of fresh air, resulting in reduced efficiency and possibly
preventing sufficient heat output.
See the drawing below for minimum dimensions.

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3.3 Distance from your swimming pool
The heat pump is normally installed within a perimeter area extending 7.5 m from the
swimming pool. The greater the distance from the pool, the greater the heat loss in the pipes.
As the pipes are mostly underground, the heat loss is low for distances up to 30 m (15 m from
and to the pump; 30 m in total) unless the ground is wet or the groundwater level is high. A
rough estimate of the heat loss per 30 m is 0.6 kWh (2,000 BTU) for every 5 ºC difference
between the water temperature in the pool and the temperature of the soil surrounding the
pipe. This increases the operating time by 3% to 5%.
3.4 Check-valve installation
Note: If automatic dosing equipment for chlorine and acidity (pH) is used, it is essential to
protect the heat pump against excessively high chemical concentrations which may corrode
the heat exchanger. For this reason, equipment of this sort must always be fitted in the piping
on the downstream side of the heat pump, and it is recommended to install a check-valve to
prevent reverse flow in the absence of water circulation.
Damage to the heat pump caused by failure to observe this instruction is not covered by the
warranty.
3.5 Typical arrangement
Note: This arrangement is only an illustrative example.

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3.6 Adjusting the bypass
Optimal operation of the heat pump occurs when the cooling gas pressure is 22 2 bar.
This pressure can be read on the pressure gauge next to the control heat pump panel. Under
these conditions the water flow through the unit is also optimal.
Note: Operation without a bypass or with improper bypass adjustment may result in
sub-optimal heat pump operation and possibly damage to the heat pump, which
renders the warranty null and void.
3.7 Electrical connection
Note: Although the heat pump is electrically isolated from the rest of the swimming pool
system, this only prevents the flow of electrical current to or from the water in the pool.
Earthing is still required for protection against short-circuits inside the unit. Always
provide a good earth connection.
Before connecting the unit, verify that the supply voltage matches the operating voltage of the
heat pump.
It is recommended to connect the heat pump to a circuit with its own fuse or circuit breaker
(slow type; curve D) and to use adequate wiring (see table below).
Connect the electrical wires to the terminal block marked ‘POWER SUPPLY’.
A second terminal block marked ‘WATER PUMP’ is located next to the first one. The filter
pump (max. 5 A / 240 V) can be connected to the second terminal block here. This allows the
filter pump operation to be controlled by the heat pump.
Out In
Heat Pump
Use the following procedure to adjust the
bypass:
•fully open all three valves
•slowly close valve 1 until the
water pressure is increased by
approximately 100 to 200 g
•Close valve 3 approximately half-
way to adjust the gas pressure in
the cooling system
•If the display shows "ON" or error
code E03, close valve 1 step by
step, to increase water flow and
stop when the code disappears.
To pool
From pool

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Note: In the case of three-phase models, swapping two phases may cause the electric motors
to run in the reverse direction, which can lead to damage. For this reason, the unit has a built-
in protective device that breaks the circuit if the connection is not correct. If the red LED above
this safety device lights up, you must swap the connections of two of the phase wires.
Model
Voltage (V)
Fuse or
circuit
breaker (A)
Rated current (A)
Wire diameter mm2
(with max. 15 m length)
NDE-08-DCP
220–240
10
4.4
3*1.5mm2
NDE-10-DCP
220–240
12
6.9
3*1.5mm2
NDE-11-DCP
220–240
15
8.5
3*2.5mm2
NDE-14-DCP
220–240
20
11.7
3*2.5mm2
NDE-17-DCP
220–240
22
16.2
3*4mm2
NDE-20-DCP
220–240
30
18.7
3*6mm2
NDE-24-DCP
220–240
30
18.7
3*6mm2
3.8 Initial operation
Note: In order to heat the water in the pool (or hot tub), the filter pump must be running
to cause the water to circulate through the heat pump. The heat pump will not start up
if the water is not circulating.
After all connections have been made and checked, carry out the following procedure:
1. Switch on the filter pump. Check for leaks and verify that water is flowing from and to the
swimming pool.
2. Connect power to the heat pump and press the On/Off button on the electronic control
panel. The unit will start up after the time delay expires (see below).
3. After a few minutes, check whether the air blowing out of the unit is cooler.
4. When you turn off the filter pump , the unit should also turn off automatically, if not adjust
the flow switch.
5. Allow the heat pump and the filter pump to run 24 hours a day until the desired water
temperature is reached. The heat pump will stop running at this point. After this, it will

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restart automatically (as long as the filter pump is running) whenever the swimming pool
water temperature drops 2 degrees below the set temperature.
Depending on the initial temperature of the water in the swimming pool and the air temperature,
it may take several days to heat the water to the desired temperature. A good swimming pool
cover can dramatically reduce the required length of time.
Water Flow Switch:
It is equipped with a flow switch to prevent the heat pump of running with inadequate water
flow rate. It will turn on when the pool pump runs and shuts off when the pump shuts off. If the
pool water level is more than 1m above or below the heat pump’s automatic adjustment knob,
your dealer may need to adjust its initial startup.
Time delay -The heat pump has a built-in 3-minute start-up delay to protect the circuitry and
avoid excessive contact wear. The unit will restart automatically after this time delay expires.
Even a brief power interruption will trigger this time delay and prevent the unit from restarting
immediately. Additional power interruptions during this delay period do not affect the 3-minute
duration of the delay.
3.9 Condensation
The air drawn into the heat pump is strongly cooled by the operation of the heat pump for
heating the pool water, which may cause condensation on the fins of the evaporator. The
amount of condensation may be as much as several liters per hour at high relative humidity.
This is sometimes mistakenly regarded as a water leak.
4. Accessories
4.1 Accessories Installation
Anti-vibration bases
1. Take out 4 Anti-vibration bases
2. Put them one by one on the
bottom of the machine like the
picture.

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Water Inlet & outlet junction
1. Use the pipe tape to connect the
water Inlet & outlet junction onto
the heat pump
2. Install the two joints like the
picture shows
3. Screw them onto the water Inlet
& outlet junction
Cable wiring
1. Open the lid of the electrical.
2. Secure the wire to the terminal block(LN
part).
Water pump wiring
1. Open the lid of the electrical.
2. Secure the wire to the terminal block (PN
part)

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5. Electrical Wiring
5.1 DC INVERTER SWIMMING POOL HEAT PUMP WIRING DIAGRAM
NDE-08/10/11/14/17/20/24-DCP

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NOTE:
(1)The above electrical wiring diagrams are only for your reference, please subject the heat
pump to the posted wiring diagram.
(2)The swimming pool heat pump must be earthed well, although the unit heat exchanger is
electrically isolated from the rest of the unit .Earthing the unit is still required to protect you
against short circuits inside the unit .Bonding is also required.
Disconnect: A disconnect (circuit breaker, fused or un-fused switch) should be located within
sight of and easily accessible from the unit. This is common practice on commercial and
residential heat pumps. It prevents remotely-energizing unattended equipment and permits
turning off power to the unit while the unit is being serviced.
6. Display Controller Operation
LED Display Controller
6.1 Overview
◎The controller is specially designed for the swimming pool heat pump series, with
features as below:
⚫Heating and cooling mode;
⚫Could show and change the running and setting parameters of the system, easy for
user to install and test.
⚫With automatic protection and fault warning function.
⚫With strong system protection function, like compressor delay protection, high
pressure, low pressure, sensor protection, water flow detects etc.
⚫The communication distance between the heat pump unit and remote controller
shouldn’t be less than 100 meters. Communication port is 485.
⚫Strong anti-interference, stable performance.
6.2 Basic Model of System Control Chart
◎System Chart
◎Control Principle
⚫The Outdoor unit is run according to the remote controller’s order
⚫The remote controller could change the running parameters and send the running
parameters to the outdoor unit
⚫The outdoor unit could detect the running condition and send the info or fault to the
remote controller
Outdoor unit
Remote Controller

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6.3 Remote Controller（LCD Wire controller（with WIFI））
◎Basic Icons
1. Heating mode, display symbol “ ”
2. Cooling mode, display symbol “ ”
3. When water pump is running，display symbol “ ”
4. “Powerful” operation mode，display symbol “POWERFUL”
5. “Silent” operation mode，display symbol “SILENT”
6. “Smart” operation mode，display symbol “SMART”
7. When compressor is running，display symbol “ ”
8. When defrosting, the “ ” display indicates defrosting operation.
9. When the fan is running, it will display “”.
10. When the WiFi connection is successful, “ ” will be on for a long time, it will be
flashing when there is no connection or in the connection.
11. When the crankshaft electric heating is on, it will display “ ”
12. Display “ ” when the screen is locked
13. “ ” flashes when appear the error code.

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6.4 Key Operating Instruction
6.41 “ ”: ON /OFF button.
Short press “ ” to exit and return to the main interface.
In the main interface, long press and hold the “ ” key for 3 seconds to turn on / off.
6.42 “ ”：Mode button.
In the power on state, long press “ ” for 3 seconds to switch the working mode: heating
mode and cooling mode.
6.43 “ ”: Add button.
When its turn on, in the main interface, press “ ” to adjust the setting temperature of
current mode;
6.44 “ ”: Reduce button.
When its turn on, in the main interface, press “ ” to adjust the setting temperature of
current mode
6.45 Parameters Query.
In the main interface, long press and hold the “ ” button for 3 seconds to enter the heat
pump status parameter query, Type “ ” , “ ” buttons for reading different parameters, and
press the “ ” button to exit the parameter query.
Heat pump status Parameter table
Inquiry Code
Description
Display Range
A01
Inlet water temp
-30~99℃
A02
Outlet water temp
-30~99℃
A03
Ambient temp
-30~99℃
A04
Discharge temp
0~125℃
A05
Suction temp
-30~99℃
A06
Outer coil temp
-30~99℃
A07
Inner coil temp
-30~99℃
A08
Main EV opening
0-480
A09
Assistant EV opening
0-480
A10
Compressor current
A11
Radiator temp
A12
DC bus voltage
A13
Compressor actual rotate speed
A14
DC fan motor actual rotate speed

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6.47 Clock setting:
Press the “ ” button to enter the clock setting state. First, the hour bit flashes, indicating
that the hour value of the current time can be adjusted through the “ ”, “” buttons. Every
time you press the “ ” button add for one hour, every time you press the “ ” button reduce
for one hour. If you hold down the “” button or “ ” button for a long time, the hours will be
incremented or decremented automatically. After setting the hour value, press “ ” again. At
this time, the minute flashes, indicating that the minute value of the current time can be
adjusted through “”“ ”button. After setting the minute value, press “ ”again to finish.
6.48 Timing settings:
Long press " " button for 3 seconds to enter timing setting:
Enter timing selection, when timing on 1" clock "flashes, hours can be set with “ ”、
“ ”and then press “ ”button to switch to clock" minute ", minutes can be set with “ ”、
“ ” button.
Press the “ ”button again to switch to the setting of "timing off 1": the clock "time"
flashes, hours can be set with “ ”、“ ”and then press the “ ” button again to switch
to the clock "minute", minutes can be set with “ ”、“ ”button.
Other time periods are set and so on;
6.49 Press “ ”to exit or confirm.
Press in the main interface to display the current number of set timing periods;
6.5 Cancel timing setting:
When the setpower-on time andpower-off time are the same, cancel the timing setting
of the current time period.
6.51 Enforced Defrosting
press “ ” and “ ”at the same time for 5 seconds, then it enters into enforced
defrosting mode.
When entering into defrosting, “ ”appears.

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6.52 Operation mode switching:
Long press “ ” and “ ”on the main interface for 3 seconds to switch operation mode:
Powerful, Smart and Silent mode.
6.53 Celsius / Fahrenheit switch:
In the off state, press “ ” and “ ” for 3 seconds in the main interface to switch between
Celsius and Fahrenheit.
6.54 Manual electric heating function
Press “ ”for 3 seconds in the main interface to turn on / off the electric heating function
manually.
6.55 System parameter setting:
Long Press and hold the “ ”+“ ”button for 5 seconds to enter the password input state.
The time display position displays "0000". Press the “ ”or “ ”button to enter the password,
and then press the “ ” key to switch the password bit. When entering the last password,
press the “ ”key to confirm the password.
Enter the 4-digit password "0814", and enter the system parameter setting after the buzzer
rings twice.
7 System Parameter:
Parameter
Code
Parameter Name
Set Range
Factory Setting
P1
Return Difference for
Target Water Temp.
1~18℃(2~36℉)
1℃(2℉)
P2
Set Temp. in Cooling Mode
8℃~35℃(46~95℉)
27℃(81℉)
P3
Set Temp. in Heating Mode
5℃~40℃(41~104℉)
40℃(104℉)
P4
Compensation Value of Inlet Water Temp.
-5℃~15℃(-9~30℉)
0℃(0℉)
P5
Defrosting Cycle
20MIN~90MIN
45MIN
P6
Defrosting Start Temp.
-9℃~-1℃(16~30℉)
-3℃(27℉)
P7
Defrosting Time
5MIN~20MIN
8MIN
P8
Temp.to Quit Defrosting
1℃~40℃(33~104℉)
20℃(68℉)
P9
Difference between
Ambient Temp. and Coil Temp.
to Start Defrosting
0℃~15℃(0~30℉)
5℃(10℉)
P10
Ambient Temp.to Start
Defrosting
0℃~20℃(32~68℉)
17℃(63℉)
P11
Electronic Expansion Valve's
20S~90S
30S