Mustang 24 Troubleshooting guide

Swimming Pool Heat Pump
User and Service Manual

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INDEX
1. Specifications
2. Dimension
3. Installation and connection
4. Accessories
5. Electrical wiring
6. Display controller operation
7. Running data setting
8. Troubleshooting
9. Exploded diagram
10. Maintenance
Thank you for purchasing our product for your pool or spa heating. Heat Pumps use the ambient air
temperature to heat your pool or spa water efficiently. Heat Pumps perform better with warmer ambient
temperatures & it will heat your water and maintain constant temperature whilst the ambient air
temperature is between -5 to 43℃. The use of a heat pump will extend your swimming season & provide
extra enjoyment for you and your family.
ATTENTION: This manual includes all the necessary information regarding the use and the
installation of your heat pump.
The installer must read the manual and attentively 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 and warranty.
The manufacturer declines any responsibility for the damage caused to people, objects and errors due to
incorrect installation. It is the owners responsibility to ensure that the pool or spa water maintains correct
water chemistry balance as bad water chemistry can damage the heat pump internal components which
will not be covered under this warranty. Any usage outside of what is stated within this manual or its
designed purpose of manufacturing will be regarded as dangerous and is not recommended.
WARNING: Please always shut off the power supply if you need to open the heat pump cabinet to work
inside the heat pump. As this is an electrical product there is high voltage electricity inside. Any electrical
connections and/or repairs should be conducted by a licensed electrician.
WARNING: When using the 10mtr external control panel extension please ensure the display controller is
located in a dry area. Also keep the insulation cover closed to protect the display on the controller from
being damaged by humidity and possible rain.
WARNING: The heat pump must be stored and transported vertically in the original packaging.
If this is not the case, it cannot be operated immediately. A minimum time of 24 hours is required before
power on.

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1. Specifications
Horizontal design, R410A, Heating & Cooling
Model MUSTANG 24 MUSTANG 30
* Heating Capacity at Air 28℃, Water 28℃,Humidity 80%
Max Heating Capacity kW 24 30
Rated Heating Capacity kW 21.5 25.5
Input Power (Heating) kW 3.31 4.47
MAX C.O.P 6.5 6.7
C.O.P 5.7 5.7
* General data
Compressor type Scroll / R410A Scroll / R410A
Voltage 380-415V~50Hz/3PH 380-415V~50Hz/3PH
Running Current Heating A 6.7 8
Advised pool volume
(with pool cover) m³ 75-120 90-130
Advised water flux m3/h 6.2~12 7.1~14
Water Pressure Drop KPa 16 18
Heat exchanger Titanium in PVC
Water connection mm 50
No. of Fan 1
Ventilation type Horizontal
Fan Speed RPM 650
Noise level(10m) dB(A) 47 48
Noise level(1m) dB(A) 57 58
Net Weight kg 91 113
Net Dimension (WxDxH) mm 1072*420*830 1072*420*830
Packing Dimension (WxDxH) mm 1155*471*885 1155*471*885
* Above data are subjects to modification without notice.

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2. Dimensions (mm)
Model: MUSTANG 24/ MUSTANG 30
3. Installation and connection
3.1 Notes
Upon purchase you will receive your complete 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 automated 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.

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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 filtration
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 limited air volume in which the air expelled from
the unit will be reused, or close to shrubbery/plant life 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. Heat Pumps require fresh air & maximum ventilation to be more productive.
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%.
3.4 Check-valve installation
Note: If automatic dosing equipment for chlorine and acid (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.

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3.5 Typical arrangement
Note: This arrangement is only an illustrative example.

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3.6 Adjusting the bypass
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.
We also recommend that electrical installation is conducted by a licensed electrician.
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 adequate
wiring.
Connection: Open the terminal box on the side panel.
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. If you are using a
secondary pump to circulate water from the pool to the heat pump this pump 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 spa), the filtration 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 through it.
After all connections have been made and checked, carry out the following procedure:
Out In
Heat Pump
Use the following procedure to adjust the
bypass:
1. Valve 1 wide open. Valve 2 & valve 3
closed.
2. Slowly open valve 2 & valve 3 by
half, then close the valve 1 slowly to
increase the water flow to valve 2 &
valve 3.
3. 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.
To pool From pool

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1. Switch on the filtration 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 turning off the filtration pump , the unit should also turn off automatically , if not, then adjust the
flow switch.
5. Allow the heat pump and the filtration 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 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 heating time & is highly recommended as standard.
Water Flow Switch:
The heat pump is fitted with an automatic flow switch to protect the heat pump from inadequate water flow.
If the pool water level is
higher 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, this 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. If there is excessive water coming from your heat pump please see your installer.

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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 feet like the
picture.
Draining jet
1. Install the draining jet under
the bottom panel
2. Connect with a water pipe to
drain the water.
Note: Lift the heat pump to
install the jet. Never overturn the
heat pump as it could damage
the compressor.

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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
Mains cable wiring
Please refer to the photo
Water pump wiring
1. With the connector 1 and 2
you can pilot the water filtration
through the timer of the filtration
(dry contact)

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5. Electrical Wiring
5.1 Electrical wiring diagram for MUSTANG 24/MUSTANG 30
NOTE:
(1)Above electrical wiring diagram is only for your reference, please consult the manufacturer for repair
advice.
(2)The swimming pool heat pump must be connected to earth, although the units heat exchanger is
electrically isolated from the rest of the unit. Grounding the unit is still required to protect you against short
circuits inside the unit .Bonding is also required.
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.

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5.2 Installation of the control panel & external cable extension (to be completed prior to
electrical connection).
Installation of the display
Photo (1) Photo (2) Photo (3)
- Disassembling of and degrafage control board of the connector (photo1)
- Installation of the provided cable (photo 2)
- To pass the cable by the press pack (photo 3) and to connect the sons directly
5.3 Connection to pilot the water pump
Dry contact timer connection
Dry contact pump connection

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6. Display Controller Operation
6.1 The buttons of LED wire controller
When the heat pump is running, the LED display shows the inlet water temperature.
6.2 Start or stop the heat pump.
Press to start the heat pump unit, the LED display shows the desired water temperature for 5 seconds, then
shows the inlet water temperature.
Press to stop the heat pump unit.
6.3 Choose heating or cooling mode:
Press until “heat” or “Cool” light is on.
6.4 Setting the real time
On standby or running mode, press , then press or to adjust hour/minute.
Then press the again to store the new data.
When setting the time, and cannot work.
6.5 Water temperature setting:
On standby or running mode, press or to adjust the desired water temperature
Note : the heat pump can running only if the water circle/filtration system is running.

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6.6 Automatic start/stop the heat pump
To set the time to start the unit
Press to set the time to start the unit, then press or to adjust the time (set the time for start
5 minutes after the water pump).
Press again to store the new data.
To set the time to stop the unit
Press to set the time to stop running, then press or to adjust the time (set the time for stop
5 minutes before the water pump).
Press again to store the new data.
6.7 Cancel the automatic start/stop
To cancel the automatic starter
Press , then press , light off and the automatic start is off.
To cancel the automatic starter
Press , then press , light off and the automatic stop is off.
Note : If the water filtration system is stop before the heat pump, the unit will shut down (security condition)
and the code EE3 or ON advertise on the controller.
It is important to program the heat pump link the time program of the water filtration system.
For restart the heat pump, turn off and turn on the electrical power supply to restart the unit.

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7. Running data setting
7.1 How to check the parameters
On standby or running mode, long press for 10 seconds, then press or to check the
parameters (from 0 to H, see operation parameter table).
7.2 How to adjust the parameters (Can only adjust on standby mode)
1) Long press for 10 seconds, press again to select the data (from 0 to L, see operation
parameter table) you want to adjust.
2) Then press or to adjust the parameter, press again to store the new data.
3) Then press or select the other datas you want to adjust, repeat above operation.

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Please kindly noted:
A) Press “MODE” to choose mode (Mode only be changed for “1” or “2” setting of parameter 6)
B) Mode can be changed while running
C) Auxiliary electrical heating is not applicable to these modes.

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7.3 How to know the current status

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Parameter Meaning Range Default Remarks
0To set the entering water temp.
under cooling mode 15-35℃28℃Adjustable
1To set the entering water temp.
under heating mode 15-40℃28℃Adjustable
2Entry into defrosting time period 30-90MIN 40MIN Adjustable
3Terms of Entry defrosting function -30℃to0℃-7℃Adjustable
4Terms of Exit defrosting 2 to 30℃20℃Adjustable
5Time of Exit defrosting 1 to 12MIN 12MIN Adjustable
6Mode: 0 Heat 1 Heat and Cool 0-1 1(Heat and Cool) Adjustable
7Mode selection of Electronic
expansion valve 0-1 1(auto) Adjustable
8Superheat for heating target -15℃-15℃3℃Adjustable
9Superheat for cooling target -15℃-15℃-2 ℃Adjustable
AManual adjustment steps of
electronic expansion valve 18-94 70 Adjustable
BInlet water temperature -9-99℃Exact testing by value
COutlet water temperature -9-99℃Exact testing by value
DCondenser temperature under
heating mode -9-99℃Exact testing by value
EGas return temperature -9-99℃Exact testing by value
FAmbient temperature -9-99℃Exact testing by value
GCondenser temperature under
Cooling mode -9-99℃Exact testing by value
HActual steps of electronic expansion
valve N*5 Exact testing by value
LEntering water temperature
calibration -9.9-9.9℃0℃Adjustable
Remarks:
(1) When HP stop running in 30 seconds, water pump will shut off automatically
(2) LED wire controller can operate the water pump after connected additional cable to the pump device in the
position of “PUMP” terminal accurately.
(3) It is necessary to put an extra 3-phase transfer device for 3 phase water pump.

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8.Troubleshooting
8.1 Error code display on controller
Malfunction Error code Reason Solution
Inlet water temperature
sensor failure
PP1 The sensor in open or short
circuit
Check or change the sensor
Outlet water temperature
sensor failure
PP2 The sensor in open or short
circuit
Check or change the sensor
Heating condenser sensor
failure
PP3 The sensor in open or short
circuit
Check or change the sensor
Gas return sensor failure PP4 The sensor in open or short
circuit
Check or change the sensor
Ambient temperature
sensor failure
PP5 The sensor in open or short
circuit
Check or change the sensor
Temperature difference
between water inlet and
outlet is too much
PP6 Water flow volume not
enough ,water pressure
difference is too low
Check the water flow volume,
backwash filter & check baskets
Cooling outlet water
temperature is too low
PP7 Water flow volume is not
enough
Check the water flow, backwash
filter & check baskets
First grade antifreeze
protection in Winter
PP7 Ambient temperature or water
inlet temperature is too low
Water pump will run
automatically for first grade
antifreeze
Second grade antifreeze
protection in Winter
PP7 Ambient temperature or water
inlet temperature is too low
Heat pump will start heating for
second grade antifreeze
Cooling condenser sensor
failure
PP8 The sensor in open or short
circuit
Check or change the sensor
High pressure protection EE1 1. Refrigerant is too high
2. Air flow is not enough
1. Discharge redundant
refrigerant from HP gas
system
2. Clean the air exchanger
Low pressure protection EE2 1. Refrigerant is low
2. Water flow is not enough
3. Filter jammed or pump
jammed
1. Check if there is any gas
leakage ,re-fill the refrigerant
2. Clean the air exchanger
3. Check filter & pump
Flow switch closed EE3 or ‘ON’ Low water flow, wrong flow
direction, or flow switch failure.
Check if the water flow is enough
and flow in right direction, or
check flow switch itself.
Power supply connections
wrong (for 3 phase unit)
EE4 Wrong connection Check the connection of power
cable
Inlet and outlet water
temperature difference
malfunction
EE5 Water flow volume is not
enough ,water pressure
difference is too low
Check the water flow rate,
backwash filter & empty baskets
Communication failure EE8 Wire connection is not good Check the wire connection