Theratherm Inverter Series Troubleshooting guide

Swimming Pool Heat Pump
User and Service Manual

1 A Division of:
Swimming Pool Heat Pump
User and Service Manual
INDEX
1. Specifications
2. Dimensions
3. Installation and connection
4. Accessories
5. Electrical wiring
6. Display controller operation
7. Troubleshooting
8. Exploded diagram
9. Maintenance
10. Warranty
11. Wifi instruction
Thank you for using Theratherm swimming pool heat pump for your pool heating, it will heat your pool water and keep
the constant temperature when the air ambient temperature is at -12 to 43℃
ATTENTION: This manual includes all the necessary information with the use and the installation of your heat
pump.
The installer must read the manual and at follow the instructions in implementation and maintenance. The installer
is responsible for the installation of the product and should follow all the instructions of the 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 by an incorrect installation that do not follow the
manual guidelines.
WARNING:
1. Please always keep the heat pump in a well ventilated place and away from anything which could cause fire.
2. Don’t weld the pipe if there is refrigerant inside the unit. Please keep the heat pump out of a confined space when
re-gassing.
3. Please always empty the water out of the heat pump during winter time, or when the ambient temperature drops
below 0℃. Or the Titanium exchanger will be damaged because of being frozen, in such case, your warranty will be
lost.
4. Please always cut the power supply if you want to open the cabinet to reach inside the heat pump, because there
is high voltage electricity inside.
5. Please keep the display controller in a dry area, or close to the insulation cover, to protect the display controller
from being damaged by humidity.

2 A Division of:
1. Specifications
1.1 Technical data
Model
Theratherm 09i
Theratherm 14i
Theratherm 20i
Theratherm 25i
* Performance at Air 28℃, Water 28℃, Humidity 80%
Heating capacity
kW
9-2.3
14-3.2
19-4.7
24-5.9
Power consumption
kW
1.55-0.18
2.26-0.25
3.17-0.36
4-0.45
C.O.P.
13-5.8
13-6.2
13-6
13-6
* Performance at Air 15℃, Water 26℃, Humidity 70%
Heating capacity
kW
6.6-1.9
9.5-2.2
14-3.9
17.2-4.5
Power consumption
kW
1.43-0.27
2.07-0.31
2.78-0.54
3.74-0.63
C.O.P.
7.1-4.6
7.2-4.6
7.2-4.6
7.2-4.6
Compressor type
Inverter Compressor
Voltage
220~240V / 50Hz or 60Hz /1PH
Rated current
A
6.9
10.0
14.0
17.7
Minimum fuse
A
10
15
21
27
Advised pool
volume
(with pool cover)
m³
12-33
18-66
55-120
65-130
Advised water flow
lpm
46.7
66.7
83.3
133.3
Water pressure drop
Kpa
12
15
18
20
Heat exchanger
Twist-titanium tube in PVC
Water connection
50mm
Fan quantity
1
Ventilation type
Horizontal

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Fan speed
500-850
550-850
450-650
Power input of Fan
W
6-35
22-82
35-130
Noise level(10m)
dB(A)
≤ 42
≤ 43
≤ 45
≤ 46
Noise level(1m)
dB(A)
40-52
40-54
41-56
42-58
Refrigerant
R410A
Net weight
kg
56
73
98
117
Gross weight
kg
68
78
113
135
Net dimension
mm
1088*380*577
1050*440*709
1050*450*870
Packing dimension
mm
1095*430*705
1130*470*850
1140*480*1010
* Above data are subjects to modification without notice.
2. Dimension (mm)
Model Theratherm 09i

4 A Division of:
Model Theratherm 14i
Model Theratherm 20i/Theratherm 25i
3. Installation and connection
3.1 Notes
Theralux supplies only the Heat Pump itself. All other components, including a bypass if necessary, must be provided
by the user or the installer.

5 A Division of:
Attention:
Please observe the following rules when installing the heat pump:
1. Any dosing of chemicals must take place in the piping located downstream from the heat pump.
2. Install a bypass in all installations.
3. Always place the heat pump on a solid foundation and use the included rubber mounts to avoid vibration and
noise.
4. Always keep 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. Installation in 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.
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%.

6 A Division of:
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.

7 A Division of:
3.6 Adjusting the bypass
Use the following procedure to adjust the
bypass:
1. Open Valve 1 & 2 half way.
2. Close valve 2 until control shows
NO Or EE3 screen.
3. Slowly open Valve 2 until pool
Temp shows on screen.
4. If it shows ‘ON’ or ‘EE3’ on display,
it means the water flow into heat
pump is not enough, then you need
adjust the valves to increase the
water flow through the heat pump.
Must not have Valves open Full.
How to get the optimum water flow:
Please turn on the heat pump under heating function, firstly close the by-pass then open it slowly to start the heat
pump (the heat pump can't start running when the water flow is insufficient).
Continue toadjust the by-pass, at the meantime tocheck the Inlet water temp. & Outletwater temp, it will be optimum
when the difference is around 2 degrees.
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 and to use the appropriate
wiring.
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.
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.
Out
Heat
Pump
To
pool

8 A Division of:
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.
3. After a few minutes, check whether the air blowing out of the unit is cooler.
4. When the filter pump is turned off, the unit should also turn off automatically, if not, then adjust the flow switch.
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 for protecting the HP unit running with adequate water flow rate. It will turn on when
the pool pump runs and shut it off when the pump shuts off. If the pool water level is higher than 1 m above or below
the heat pump’s automatic adjustment knob, your dealer may need to adjust its initial start-up.
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 cooled by the operation of the heat pump to heat the pool water, which may
cause condensation on the fins of the evaporator. The amount of condensation may be as much as several litres per
hour at high relative humidity. This is sometimes mistakenly regarded as a water leak.
3.10 Operating modes for optimal use
POWER: Used primarily at the beginning of the season because this mode allows for very rapid temperature rise.
SMART: The heat pump has completed its primary task, in this mode; the heat pump is in a position to maintain the
pool water in an energy efficient manner. By automatically adjusting speed of compressor and fan the heat pump
delivers a higher efficiency.
SILENT: In the summer months when the heat output is minimal required, the heat pump in this mode is even more
economic. Added benefit; when the heat pump heats. It does so with minimal noise.

9 A Division of:
4. Accessories
4.1 Accessories list
Anti-vibration base, 4 pcs
Draining jet, 2 pcs
Waterproof box, 1 pc
10M Signal wire, 1 pc
Water drainage pipes, 2 pcs
4.2 Accessories Installation
Anti-vibration bases
1. Take out 4 Anti-vibration bases
2. Put them one by one on the
bottom of machine like the picture.
Draining jet
1. Install the draining jet under the
bottom panel
2. Connect with a water pipe to
drain out the water.
Note: Lift the heat pump to install the jet.
Never overturn the heat pump, it could
damage the compressor.

10 A Division of:
Water Inlet & outlet junction
1. Remove black union nut from the
Theratherm anti clockwise and
remove plastic cover.
2. Check o ring is in place as per picture.
3. Insert black union between o ring and
union nut.
4. Screw union nut clockwise until hand
tight.
Cable wiring
1. To be connected by a licenced
Electrician
2. 1&2 port is (dry contact) for heat
demand. Max 5V
Dry contact timer connection:
Supplied and installed by an licenced Electrician.
Non-contact Timer system
Set timer to the times devised, example (9am-5pm) but circulation pump will not activate unless contact closed
within the hours by Theratherm Inverter. (Timer to be supplied by Electrician)

11 A Division of:
Dry contact with a relay system: (Relay to be supplied by Electrician)

12 A Division of:
Dry contact pump connection with Theraconnect
This device makes the Theratherm inverter and the Therachlor system able to use the one pump.
Making this a one pump system saving power by removing the cost of an extra circulation pump.
5. Electrical Wiring
5.1 SWIMMING POOL HEAT PUMP WIRING DIADRAM
Theratherm 09i/Theratherm 14i/Theratherm 20i/ Theratherm 25i

13 A Division of:

14 A Division of:
NOTE:
(1)Above electrical wiring diagram for your reference.
(2)The swimming pool heat pump must be connected earthed, although the unit heat exchanger is electrically isolated
from the rest of the unit. Grounding the unit is still required to protect against short circuits inside the unit. Bonding
is also required.

15 A Division of:
(3)It is recommended that your pool filtration pump and your heat pump are wired independently.
Disconnect: A disconnect means (circuit breaker, fused or un-fused switch) should be located within sight of and
readily 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 at the unit, while the unit is being serviced.
5.2 Installation of the display deportee
Photo(1) Photo(2) Photo(3) Photo(4) Photo(5)
-The side with plug connects with the control panel (photo 1)
-The other side of the signal wire. (photo 2)
-Open the wiring panel and put the side without plug through the electrical box. (photo 3, 4)
-Insert the wiring into the designated position (code:COM 1 or COM-L) on the PC board. (photo 5)

16 A Division of:
6. Display Controller Operation
6.1 The buttons of LED wire controller
6.2 The keys and their operations
NOTE: Every time, when the heat pump connects to the power, the LED display shows a code for 3 seconds which
indicates the heat pump model.
6.2.1button
Pressto start the heat pump unit, the LED display shows the desired water temperature for 5 seconds, then
shows the inlet water temperature and the operation mode.
Press to stop the heat pump unit and show “OFF”
Notice : During the parameter checking and setting, press the to quick-exit and save the current setting .
Press again to turn on/off the unit.
6.2.2 button
Automatic mode:
Pressfor 5 seconds to switch to automatic mode. (default: Smart mode)
Pressfor 5 seconds again to exit automatic mode and switch to heating mode (default:Smart mode)

17 A Division of:
Note: Under Automatic mode, it is useless to set parameter P1 .
Operation logic of Auto Mode:
Set water temperature
(Tset)
Current water in
temperature
(Tset +2℃)
Current working
mode
After 3 minutes or
above, it will switch
to
Tset (eg: 28℃)
Tset +2℃
(eg:30℃)
Heating mode
Cooling mode
Tset (eg: 28℃)
Tset-2℃(eg: 26℃)
Cooling mode
Heating mode
6.2.3 button
Lock/unlock the display:
Hold for 5 seconds to lock/unlock the display.
Water temperature setting :
Press to set the water temperature directly.
Parameter checking :
Press first, then press to check the “ User parameter from d0 to d11”.
Code
Condition
Scope
Remark
d0
IPM mould temperature
0-120℃
Real testing value
d1
Inlet water temp.
-9℃～99℃
Real testing value
d2
Outlet water temp.
-9℃～99℃
Real testing value
d3
Ambient temp.
-30℃～70℃
Real testing value
d4
Frequency limitation code
0,1,2,4,8,16
Real testing value
d5
Piping temp.
-30℃～70℃
Real testing value
d6
Gas exhaust temperature
0℃～C5℃ (125℃)
Real testing value
d7
Step of EEV
0～99
N*5
d8
Compressor running frequency
0～99Hz
Real testing value
d9
Compressor current
0～30A
Real testing value
and
and
or

18 A Division of:
d10
Current fan speed
0-1200 （rpm）
Real testing value
d11
Error code for last time
All error code
Pressto check the “ User parameter from P0 to P7.
If needed, press second, then press to adjust the current parameter.
first, then press to enter parameter P7 checking, and press second, then press
to adjust the parameter P7 Inlet water temp. Correction from -9 to 9.)
Code
Name
Scope
Default
Remark
P0
Manual defrost
0-1
0
1 Manual defrosting mode, 0 Normal mode
P1
Working mode
0-1
1
1 Heating mode，0 cooling mode
P2
Timer on/off
0-1
0
1 Timer on/off is under function ，0 Timer on/off is out of
function (The setting of P4 and P5 won’t work)
P3
Water pump
0-1
0
1 Always running，0 Depends on the running of compressor
P4
Current time
HH:MM
00：00
0-23:0-59
P5
Timer on
HH:MM
00：00
0-23:0-59
P6
Timer off
HH:MM
00：00
0-23:0-59
P7
Inlet water temp.
correction
-9～9
0
Default setting: 0
NOTE: Under defrosting mode, P0=1.
After defrosting finished, it will be automatic enter Normal mode, P0=0.
6.2.4 System reset function
Press in 10s, the system will reset and display “0000” on the controller.
or
and
first,
then
press
(
F
or
example:
Press
or