TECHNICAL MANUAL
installation and maintenance

AIR-WATER HEAT PUMP

MODEL
TERMOCASA   TMC A6, A12, A18, A24 HYPER

 

 

                   

 

Congratulations!

 

You are the owner of a TMC HYPERJET heat pump. In this manual you can find out how to use this heat pump.

 

Keep this manual as it contains installation and maintenance instructions. This product is designed to work for a long time. In order to use and maintain the product in optimal operating conditions, it is necessary to keep the manual.

Why choose the pumps produced by the company TERMOCASA?

  • Heat pumps TERMOCASA incorporates technologies and materials invented and patented in Romania by Romanian engineers;
  • Heat pumps TERMOCASA air-water are the only ones that operate in a modular system;
  • Heat pumps TERMOCASA benefits from very long warranty periods and ultra-fast service due to the increased reliability and attention to the customer;
  • Heat pumps TERMOCASA benefits from the most efficient ULTRAFLEX flexible heat exchangers on the market - invented in Romania;
  • Heat pumps TERMOCASA they have performances hard to match even the most well-known brands of heat pumps.

TECHNICAL DATA TMC A12 hyper-jet HEAT PUMP 

Technical data TMC A6 TMC A12 TMC A18 TMC A24
         
     Rated power input kw / h 0,16 - 3,1 0,16 - 6.2 0,16 - 9,3 0,16 - 12,4
     Heating power kw / h 1,6 - 8,8 1,6 - 17,6 1,6 - 26,4 1,6 - 35,2
     Minimum operating temperature ° C  . . . .
     Max SCOP compressor performance coefficient 5.1 5.1 5.1 5.1
          Noise level (decibels) <60 <60 <60 <60
          Compressor  Full DC Inverter Full DC Inverter Full DC Inverter Full DC Inverter
          V / Hz power supply TBU TBU TBU TBU
          Refrigerant (optional additive) R32 R32 R32 R32
     Ultraflex heat exchanger (optional galvanic) Pipe in pipe Pipe in pipe Pipe in pipe Pipe in pipe
          Pressure protection HP / LP HP / LP HP / LP HP / LP
          Internet or radio control Optional: Optional: Optional: Optional:
          Transport weight Kg 20 + 50 20 + 50 + 50 20 50 + + + 50 50 20+50+50+50+50
     Unit int Dimensions / gauge cm (without rear connections) H65-L70-L65 H65-L70-L65 H65-L70-L65 H65-L70-L65

Environmental protection is a priority for the group TERMOCASA.

Product quality, efficiency and environmental protection are all equally important goals for us. Laws and provisions regarding environmental protection are strictly observed.

An easy-to-use heat pump

The TMC HYPER-JET heat pump uses as its primary source of heat capture the ambient air using the captured energy to heat your building. The heat pump can be connected to the building's heating system as well as to a domestic hot water boiler.

Important!

When delivering and installing the product, carefully check the following important points:

  • The TMC HYPER-JET heat pump must be placed and transported in an upright position;
  • Check the product whether or not it has been hit during transport;
  • If blows are observed, report them to the carrier and supplier;
  • Place the TMC HYPER-JET heat pump on a straight surface of concrete or other rigid materials.

 

Transport

  • The product must be transported and stored in an upright position.
  • To avoid impact during transport, do not unpack the product until it reaches the room and the place where you want to mount it.
  • The heat pump can be operated with a forklift or manually with special care.

Unpacking

Unpack the heat pump only after bringing it close to the area where it will be installed. Check that the product has been hit during transport. Report any wear and tear caused by transport from the contracted supplier.

Safety instructions

  • Make sure the product is unplugged before any intervention.
  • When mounting the product, if a clamping / moving device is used, first check it for wear and tear that could endanger the product or the installer.
  • Do not post under the product while it is suspended.
  • Do not endanger yourself by attempting to disassemble the product housing.
  • Do not endanger yourself by connecting the equipment to worn or incorrectly sized electrical fuses.
  • Work on the electrical panel or heat circuit must only be carried out by authorized persons.
  • This appliance is filled with flammable R32 refrigerant. Improper use of the appliance leads to risks of serious personal injury and property damage, for this reason the installation should only be done by authorized persons.

TMC HYPER JET heat pump installation options

  • The heat pump can be installed to serve both the heating / cooling air conditioning system of the house as well as one or more boilers for domestic hot water heating.
  • The indoor unit of the heat pump must be located for proper operation above floor level. Remember that the outdoor module (s) can generate noise during operation of less than 60db
  • The TMC HYPER JET heat pump has no user-made settings but is automatically set to meet your needs.
  • The command and control elements inside the heat pump can only be accessed by an authorized person.
  • After the authorized installer has completed the installation of the pump, check the installation together. Allow the installer to show you how to start and maintain the heat pump so that you can understand the principle of operation.
  • The heat pump is switched off using the thermostat installed by your installer on the outside of the heat pump or disconnected from the power supply.
  • The heat pump is equipped with a compressor shut-off system that is triggered in the event of an electrical overload, and the cause of such an error may be:
    • Compressor is overloaded - Contact a technician.
    • Defective compressor - Contact a technician.
    • Off due to electrical overload - Contact a technician.

Product installation

This chapter is dedicated to those who are authorized to install the product (authorized installer / electrician) so that the TMC HYPER JET heat pump works properly to the parameters required by the owner. However, the user has all the necessary information in this manual to be able to understand and use the purchased product correctly.

Hydraulic and electrical connections:
(Heat connections are made with 32mm PPR pipe)

Indoor unit

Dimensions: H 650mm, L 650mm, A 750mm

1) Ambient sensors, 2) Heat input, 3) Heat outlet, 4) Refrigerant connections for modules 1,2,3,4, 5) Thermostat (s) or smart home control, 6) External thermostat control (for cascade module operation),  7) 8) 9 (10) Outdoor unit communication cable 1,2,3,4, 11) Recirculation pump supply, 12) Power module ext.1, 13) Power module ext.2, 14) Power module ext.3, 15) Power module ext.4, 16) IR communication remote control.

Indoor heat pump unit

 

External module

Outside heat pump mode

 

INSTALLATION SCHEMES

The installation can be performed either with the indoor unit located above the outdoor unit, or vice versa.

I The external unit (UE) located below and the internal unit (UI) above (fig.4).

In this case, it is necessary to make a siphon (6) on the suction line (3), in order to block the leakage of the refrigerant liquid and to avoid the return of the liquid in the compressor. The connecting pipes must be insulated.

The legend:  1.External unit (EU); 2.Internal unit (UI); 3.Gas pipeline (larger diameter); 4.Pipe on the liquid side; 5.Condensate drain pipe; 6.Siphon

II The external unit (UE) located above and the internal unit (UI) below (fig.5). In this case, siphons (3) must be provided on the suction line (6) every three meters of level difference. These siphons have the role of making it possible for the oil to return to the compressor. The connecting pipes must be insulated.

The legend:  1.External unit (EU); 2.Internal unit (UI); 3.Gas pipeline (larger diameter); 4.Pipe on the liquid side; 5.Condensate drain pipe; 6.Siphon

Heat pump installationHeat pump installation

DO NOT ALLOW THE SIGNAL CABLE TO INTERFER WITH OTHER CABLES. Using vinyl tape, secure electrical cables and refrigerant pipes. DO NOT WRAP THE ENDS OF THE PIPES than after performing leak tests. When installing the indoor unit, if you are installing new connecting pipes to the outdoor unit, you must be careful When passing refrigerant pipes through the hole in the wall, check that the ends of the refrigerant pipes are sealed to prevent dirt or impurities from entering the pipes. Slowly pass the wrapped connection of refrigerant pipes and signal cables through the hole in the wall. When drilling a hole in the wall (minimum diameter 32mm), make sure that cables, pipes and other sensitive components are not touched and that the hole is tilted outwards.

LIMITATIONS ON THE LENGTH AND LEVEL DIFFERENCE OF COOLING PIPES

The length of the coolant pipes between the indoor and outdoor unit must be as small as possible; however, it is restricted by the maximum values ​​of the level difference between the units. With the decrease of the level difference between the units (H1 / H2) and the length of the pipes (L), the pressure losses will be limited, increasing the total efficiency of the device.

Observe the limits in the following tables.

Model UM  
Liquid line connections " 3 / 8 "
Gas line connections " 5 / 8 "
Maximum length ml 20
Maximum height difference (H1 / H2) m 25
Length with standard refrigerant charge m 5
Refrigerant Tip:  R32
Refrigerant charging kg 1,6

 

INSTALLATION OF THE EXTERNAL UNIT

When choosing the installation location of the outdoor unit, consider the following:

Before starting the installation, check that the outdoor unit has been transported upright. If this has not happened, position it correctly and wait at least two hours before starting it. If possible, position the unit away from rain and direct sunlight in a well-ventilated area. Place the unit in a place where there are no support issues and where vibration and noise cannot be amplified. Position it so that the operating noise and airflow do not disturb the neighbors. Position it respecting the minimum distances from walls, furniture or other objects that may exist around (fig.6 and fig.7). If the installation takes place on the ground, avoid areas with a risk of accumulation or falls of water, the formation of ditches, etc. In areas with a lot of snow or where the temperature is kept below 0 ° C for long periods, install the unit on a 20-30 cm cement base to prevent snow from accumulating around the appliance. In winter, heat pumps produce condensation, which falls on the supporting surface, forming water deposits and is sometimes disturbing and / or unpleasant. To avoid this, use the condensate drain kit as described in the appropriate paragraph. The air conditioning system must not be surrounded by more than three walls in order to ensure the necessary ventilation for proper operation.

Heat pump installation

 

Heat pump installation

Installing the outdoor unit. Mount the outdoor unit on a rigid stand to prevent noise and vibration from rising. Provide weather protection to protect against sunlight and rain. Make sure that there are no obstacles blocking the expelled air. Do not install near public access roads, crowded areas, or where the noise from the unit will disturb those around you or near animals or plants that would be affected by the repressed air, away from any source of flammable gases. If the unit is exposed to strong winds: Install the unit so that the fan discharge is at a 90 ° angle to the wind direction.

If the unit is frequently exposed to heavy rain or snow, install a guard over the unit to protect the unit from rain or snow, otherwise the heat pump will defrost repeatedly. Be careful not to obstruct the flow of air around the unit. Before attaching the outdoor unit to the established location, you must install a drain connection at its bottom. There are two types of drain connections depending on the type of external unit. Connect the drain hose (not included) to the drain connection to divert water to the front of the unit during heating mode.

Hydraulic connection

The installation of the product must be done carefully taking into account the installation standards and the building plan. The product must be connected to an expansion vessel in a closed system. Remember to clean the radiators of rust and other debris before mounting.

Complete all installation / adjustment steps according to the description in the installation chapter "Commissioning the product".

The flow and return pipes of the heating medium circuit must have a recommended diameter of 32 mm.

The heat pump can operate with temperatures up to about 50 ° C on the return and returns to the circuit (flow) maximum temperatures of 65 ° C for short periods of time (0-3 hours for boiler water heating) and the continuous operating temperature ( normal) of the heat pump must not exceed 40 degrees Celsius per return and 45 degrees Celsius per flow heat sink.

Circulation pump

The circulation pump (recommended minimum 32-8) for the heating / cooling agent must be dimensioned so that it can ensure a temperature difference of the thermal agent between flow and return between 3 and 7 degrees Celsius to ensure an optimal operation of the heat pump. .

Make sure that a sufficiently large circulation pump has been fitted so as to provide the heat pump with sufficient heat. We recommend a Wilo, Grundfos or Pedrollo pump, which are suitable for most heating systems.

airing

  • There must be no air on the circuit. Even the smallest air bubbles can affect the proper functioning of the product.
  • After loading the heating system with liquid, check if there is a background noise from the pump, check that it has been completely vented. Add water / antifreeze if necessary to achieve the appropriate pressure, ie between 1,5 and 3 bar.

Electric instalation

The electrical installation and installation of the heat pumps must be carried out by an authorized electrician. All cable connections must be made in accordance with the relevant rules and regulations.

BEFORE MAKING ELECTRICAL CONNECTIONS, READ THESE REGULATIONS

All connections must be in accordance with local and national codes and must be installed by a authorized electrician. All electrical connections must be made according to the Wiring Diagram located on the panels of the indoor and outdoor units. If there is a serious safety problem with the power supply, stop operation immediately. Explain the reason for this interruption to the customer and refuse to install the unit until the safety reason has been resolved. The supply voltage must be between 95-100% of the rated voltage. Insufficient power supply can cause a malfunction, electric shock, or fire. If the power supply is connected via fixed cables, install a surge protector and a switch on the mains mains with a capacity 1,5 times the capacity of the unit. If the power supply is connected via fixed cables, a switch or switch that disconnects all poles and has a separation contact of at least 3 mm must be included in the fixed wiring. The unit should only be connected to an individual output branch of the circuit. Do not connect other equipment to that output.

Make sure you have properly grounded the heat pump Termocasa.

Each cable must be securely fastened. Loosen the wiring that may cause the terminal to overheat, resulting in product failure and possible fire. Do not allow cables to touch or sit on the refrigerant pipe, compressor, or many moving components in the unit.

WARNING BEFORE MAKING ANY ELECTRICAL CONNECTIONS, TURN OFF THE MAIN POWER SUPPLY OF THE SYSTEM.

  • Connect the signal cable that allows communication between indoor and outdoor units. You must first choose the correct cable size before preparing it for connection.
  • Power cables for indoor units (if applicable): H05VV-F 5x4mmp, 5x2.5mmp or H05V2V2-F 3x2,5mmp
  • Power cables for outdoor units: H07RN-F 3x2,5mmp
  • Signal cable: H07RN-F 5x2,5mmp
  • BEWARE OF THE PHASE CABLES! While crimping the cables, make sure that the Phase ("L") is clearly distinguished from the other cables and do not reverse the phase cable with the zero cable. This could be dangerous and could cause the heat pump to malfunction Termocasa.
  • Wrap the pipes and cables. Before passing the pipes and signal cables through the hole in the wall, you need to tie them together to take up less space, protect them and insulate them.

Power source

The TMC HYPER-JET heat pump must be connected to 230V or 380V, an uninterruptible, earth-protected source and a voltage stabilizer in case the supply voltage variation is greater than +/- 3%.

Safety switch

The electrical installation must contain a safety switch for the complete interruption of the electrical energy.

IMPORTANT!

The heat pump has maximum efficiency and low consumption when:

  • the temperature difference between flow and return is between 3 and 7 degrees Celsius
  • insulation of all contact surfaces of the building with the outside to be as good as possible (equivalent to a polystyrene of at least 8-10 cm)
  • the radiant surfaces (radiator, floor, fan coil units, etc.) should be as high as possible so that the temperature of the heating medium (35-45 degrees Celsius per flow) is sufficient to heat the building.
  • The service period and inspection of the heat pump for the maintenance of the warranty periods, ie the inspection and replacement of certain components if necessary, must not exceed 3 calendar years regardless of the type of warranty.

Wiring diagram heat pump + boiler + building heating:

1) boiler thermostat, 2) 3-way solenoid valve TERMOCASA, 3) ambient thermostat, 4) heat pump, 5) heat pump supply, 6) recirculation pump, 7) 3-way boiler / valve thermostat supply.

Electric sketch heat pump air water

 

Simplified electric sketch heat pump air water

ASSEMBLY SCHEME 2 HEAT PUMPS WITH PUFFER AND BOILER

5) heat pump, 6) 3-way solenoid valve Termocasa, 7) recirculation pump, 8) domestic hot water boiler, 9) hot water outlet boiler, 10) cold water boiler inlet, 11) storage tank (buffer), 12) building heating circuits.

Sketch heat pump with two puffer and boiler pumps

HEAT PUMP ASSEMBLY SCHEME WITH PUFFER AND BOILER

5) heat pump, 6) recirculation pump, 7) 3-way solenoid valve Termocasa, 8) hot water outlet boiler, 9) domestic hot water boiler, 10) cold water boiler inlet, 11) storage tank (buffer), 12) building heating circuits

Sketch heat pump with buffer and boiler

BOILER HEAT PUMP ASSEMBLY SCHEME

5) heat pump, 6) recirculation pump, 7) 3-way solenoid valve Termocasa, 8) hot water outlet boiler, 9) domestic hot water boiler, 10) cold water boiler inlet, 11) building heating circuits

Sketch heat pump with boiler

ASSEMBLY SCHEME OF HEAT PUMP WITH PUFFER, BOILER AND SOLAR PANEL

1) thermal power plant, 2) DHW (domestic hot water) boiler, 3) recirculation pump, 4) 3-way solenoid valve, 5) recirculation pump, 6) gravitational damper, 7) solar panel, 8) recirculation pump, 9) building heating circuits, 10) storage tank (buffer)

The 3-way solenoid valve (4) from the green circuit and the recirculation pump (5) will be supplied from the solar panel automation.

Sketch heat pump with buffer, boiler and solar panel

ASSEMBLY SCHEME OF HEAT PUMP WITH PUFFER, BOILER AND SOLAR PANEL (with intermediate exchanger)

5) heat pump, 6) recirculation pump, 7) 3-way solenoid valve Termocasa (2 pcs.), 8) hot water outlet boiler, 9) domestic hot water boiler, 10) cold water boiler inlet, 11) storage tank (buffer), 12) building heating circuits, 13) sense flap, 14) recirculation pump, 15) solar panel with direct absorption, 16) intermediate heat exchanger, 17) recirculation pump, 18) recirculation pump.

The 3-way valve (7) on the green circuit and the recirculation pump (18) will be supplied from the solar panel automation.

Sketch of heat pump with buffer, boiler and solar panel with intermediate exchanger

RECOMMENDATIONS:

  • The location of the indoor unit will be done in spaces with a temperature lower than 25 degrees Celsius during the cold season and with a temperature higher than 20 degrees Celsius during the hot season. If there is underfloor heating in the technical room, it is recommended to place a rubber insulating mat under and around the indoor unit at least 30 cm away to avoid overheating or under-cooling the sensors located on the back of the housing.
  • Recirculation pumps must be at least 32-8 (connection 32, pressure 0.8 bar) or if better recirculation is required then the Pedrollo JSW1C pump or other more powerful pumps with fixed flow rates and speed can be used. maximum.
  • The refrigerant circuit from the indoor unit is pressurized to 30 bar with nitrogen, and when commissioning (after making connections with Dutch) by opening the valves from the indoor unit, you can check the tightness of the connections / connections with a fine foam that allows the visualization of leaks.
  • After checking the tightness, the nitrogen will be evacuated from the refrigeration circuit (recommended by vacuuming) and the valves from the external unit will be opened to allow the refrigerant to enter the whole circuit.
  • After completing the installation, all modules will be powered / started, the remote control will be directed in the direction of the viewfinder (maximum 5 cm) from the front of the housing, and the remote control will press the up arrow until it reaches 30 degrees, and the MODE button press until AUTO is displayed on the remote control.
  • The 3-way TMC valve can be mounted both on the flow and on the return, because we have temperatures below 60 degrees.

     

  • Flows or returns from heat pumps (if there are 2 or more) do not connect more than one heat pump to the same buffer connection, the flow is connected to the highest connection, and the return to the lowest of the buffer.
  • The supply voltage must be 230v or 380v (230v on each phase) both at the start of the heat pump and during operation with a tolerance of +/- 3%.
  • Before starting the heat pump, the circuits must be checked so that the valves are not closed or the 3-way valve is not locked in a position to block the passage of the heating medium.
  • At the first start of the heat pump, it is recommended to use a normal socket to supply the recirculation pump, and after setting the thermostats (boiler and buffer), the pumps should be supplied from the socket mounted on the heat pump housing.
  • Temperature difference between flow (hot outlet) and return (warm entrance) should be about 5 degrees.
  • Temperature difference between flow (cold exit) and return (cold entry) should be about 5 degrees.
  • To accurately measure the temperature a non-contact thermometer, and the reading shall be carried out on metal surfaces previously covered with an electrical insulating tape or non-reflective paint.
  • The heat pump exchangers from the moment of starting use must be constantly immersed in water / liquid, otherwise there is a risk of damage and even cracking !!!
  • The surface of the coil in the boiler must be a minimum of:
    • 3 mp pt. a 24kw pump,
    • 2,5sqm pt. an 18kw pump,
    • 2sqm pt. an 12kw pump,
    • 1,5sqm pt. a 6kw pump.
  • The hydraulic connections are made of 32mm PPR pipe, and you must have a safety valve of maximum 3 bar installed on the two circuits.
  • The pressure drop in the heat exchanger, which must be taken into account when dimensioning the recirculation pump and is between 1 and 1,5 bar.
  • If no buffer is used, check the temperature difference between the flow (hot outlet) and return (warm entrance), and if it is higher than 7 degrees due to the undersizing of the home heating system, a stronger recirculation pump or a hydrophore pump will be used on the return if necessary.
  • When using radiators / radiators / fan coils, they must have 1kw rated power for every 3-5sqm of heated building, ie in a 20sqm room you need 4-6kw (rated power).

Indoor unit heat pump (UI) dimensions:

Indoor unit heat pump               Indoor unit heat pump

DECLARATION OF CONFORMITY

The company declares that this appliance complies with the requirements of the following directives and subsequent amendments:

  • Low Voltage Directive 2014/35 / EU;
  • Electromagnetic Compatibility Directive 2014/30 / EU;
  • EU Directive 2012/19 / WEEE;
  • RoHS Directive 2011/65 / EU.
  • Directive 2009/125 / EC ErP
  • EU Regulation on energy labeling 2017/1369;

And they are in accordance with the requirements of the Norm:

  • EN 60335-2-40

Heat pumps Termocasa

To remember:

Fill in the blanks below. They can be useful in case of emergency.

Product

 

Product code

Installed by

 

Nr. phone

Date of installation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

List of authorized installers:

- Bârlea Marcel - tel .: 0784080000
(national coverage - Romania)

 

 

- Varga Daniel - tel .: 0771346985
(national coverage - Romania)

 

 

- Habasescu Lucian - tel .: 0742093544
(county coverage: Bihor, Satu Mare, Arad, Timiș, Alba, Sălaj, Hunedoara, Maramureș, Bistrița Năsăud)

 

 

- Merca Constantin - tel .: 0745200004
(county coverage: Bihor, Satu Mare, Arad, Timiș, Alba, Sălaj, Hunedoara, Maramureș, Bistrița Năsăud)

 

 

- Butuc Iosif - tel .: 0741146358
(coverage of counties: Constanţa, Tulcea, Brăila, Galaţi, Ialomiţa, Călăraşi, Bucharest, Ilfov)

 

 

- Andrei Borz - tel .: 0740345209
(coverage of counties: Satu Mare, Maramureş, Bihor, Sălaj)

 

 

 

 

 

 

 

 

 

 

Putting into service

Circle the existence variant at the location or fill in the values.

When checking the parameters, use a voltage measuring device, a non-contact thermometer (infrared laser), high / low pressure refrigeration manometer, vacuum pump.

{With non-contact thermometer (laser - infrared) the temperature values ​​will be measured only on metallic surfaces covered with paint or a layer of insulating tape}

Heat pump type / model:

........................................

Series: .............................

Date of purchase .......................

 

Date of installation .......................

Name + first name of the owner

..........................................

..........................................

Name + surname + installer phone

..........................................

..........................................

Location where heat pump is installed: .......................................... .

...........................................

...........................................

         
Type of verification

Parameter 1

Parameter 2

Parameter 3

Parameter 4

 1) The socket voltage should preferably be checked between 17-21

Socket voltage before starting: .................. V  Socket voltage at start-up: .............. V   Socket voltage during operation: ............. V  
 2) Flow / Return Temperature  Flow temperature after 15 minutes of operation: ........ ° C)  Return temperature after 15min operation: ........ ° C)    

 3) What brand / model is the recirculation pump?

..........................................

       

 4) Or checked all refrigeration connections with fine foam?

 YES NO

       

 5) Has the indoor module + refrigeration path been emptied before opening the refrigerant valve of the outdoor module?

 YES NO

       

 6) Is there a sense valve / flap or filter mounted on the heating circuit? 

 YES NO

 

   
 7) Are there equalization cylinders installed in the installation? YES NO        
 8) What is the surface of the boiler coil (summed both if necessary) .......... sqm        

 9) Is there a minimum space of 25cm around the indoor unit and above it?   

 YES NO

       
         

 

 Please send on Whatsup to the phone number: .............. a video recording with the outdoor module (s) as well as with the technical camera (indoor unit + connections). The filming should be done similarly to the one in the link: ........... 

 

 

 

 

 

 

 

 

 

 

 

TROUBLESHOOTING

Safety

Careful! The capacitors are electrically charged, even if the power supply is turned off. Don't forget to discharge the current into the capacitor.

Troubleshooting Air-to-water heat pumps

For other models, please connect the discharge resistor (approximately 100Ω 40W) or soldering iron (plug) between the +, - terminals of the electrolytic capacitor on the opposite side of the outer PCB.

Troubleshooting Air-to-water heat pumps

Note: The image above is for reference only. The side plug may be different.

1. Indoor unit error display

Operation lamp Timer lamp Display LED STATUS
☆ 1 time X E0 EEPROM internal drive parameter error
☆ 2 times X E1 Communication error of indoor / outdoor units
☆ 4 times X E3 The speed of the indoor fan got out of hand
☆ 5 times X E4 Indoor room temperature sensor T1 - open circuit or short circuit
☆ 6 times X E5 Evaporator coil temperature sensor T2 - open circuit or short circuit
☆ 7 times X EC Detection of refrigerant leaks
☆ 1 time O F0 Overload current protection
☆ 2 times O F1 Outdoor ambient temperature sensor T4 - open circuit or short circuit
☆ 3 times O F2 Condenser coil temperature sensor T3 - open circuit or short circuit
☆ 4 times O F3 Compressor temperature discharge sensor T5 - open circuit or short circuit
☆ 5 times O F4 Outdoor unit EEPROM parameter error
☆ 6 times O F5 The speed of the outdoor fan was out of control
☆ 1 time P0 IPM failure or IGBT current protection too strong
☆ 2 times P1 Overvoltage or low voltage protection
☆ 3 times P2 High temperature protection of the IPM module or compressor
☆ 5 times P4 Inverter compressor unit error

 

O (light) X (off) ☆ (flashing)

 

1.2 Troubleshooting

1.2.1 Diagnosis and troubleshooting of EEPROM parameters (E0 / F4)

Error code E0 / F4
Failure decision The main inner or outer PCB chip does not receive feedback from the EEPROM chip.
Alleged causes ● Installation error
● Defective PCB          

Troubleshooting:

Troubleshooting

EEPROM: a read-only memory whose contents can be deleted and reprogrammed using a voltage pulse. For the location of the EEPROM chip, please see the photos below.

Troubleshooting Air-to-water heat pumps

Note: The two photos above are for reference only, they may not be exactly the same as the ones you have.

1.2.2 Diagnosis and communication solution of the indoor / outdoor unit (E1)

Error code E1
Conditions for decision of malfunction The indoor unit does not receive feedback from the outdoor unit for 110 seconds and this condition happens four times continuously.
Alleged causes ● Wiring error
● Defective internal or external PCB

Troubleshooting:

Troubleshooting

1.2.3 Fan speed out of control - diagnosis and solution (E3)

Error code E3 / F5
Failure decision conditions When the speed of the indoor fan remains too low (300RPM) for a certain period of time, the unit will turn off and the LED will display the fault.
Alleged causes ● Wiring error
● The fan is defective
● The fan motor is defective
● Defective PCB

Troubleshooting:

Troubleshooting

Index1:

1: Indoor or outdoor DC fan motor (control chip is in the fan motor)

Also start when the unit is in standby mode, measure the voltage pin1-pin3, pin4-pin3 in the fan motor connector. If the voltage value is not in the range shown in the table below, the PCB must be in trouble and must be replaced.

Troubleshooting Air-to-water heat pumps

DC motor voltage input and output

No. Color Signal Voltage
1 Red Vs / Vm 280V ~ 380V
2 --- --- ---
3 Black GND 0V
4 Alb Vcc 14-17.5V
5 Yellow Vsp 0~5.6V
6 Blue FG 14-17.5V

2. External DC fan motor (control chip is in external PCB)

Start and check if the fan can operate normally, if the fan can operate normally, the PCB should have problems and need to be replaced. If the fan cannot operate normally, measure the resistance of each of the two pins. If the resistance is not equal to each other, the fan motor must have problems and must be replaced, otherwise the PCB must have problems and must be replaced.

 

3. Indoor AC fan motor

Turn on and set the unit to operate in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin 1 and pin 2. If the voltage value is less than 100V (208 ~ 240V power supply) or 50V (115V power supply), the PCB has problems and needs to be replaced.

1.2.4 Temperature sensor open or short circuit - diagnostics and solution (E5)

Error code E4/E5/F1/F2/F3
Failure decision conditions If the sampling voltage is less than 0,06V or greater than 4,94V, the LED will display the fault.
Alleged causes ● Wiring error
● Defective sensor

Troubleshooting:

Troubleshooting

Troubleshooting Air-to-water heat pumps

1.2.5 Detection of refrigerant leaks - diagnosis and solution (EC)

Error code EC
Failure decision conditions Define the temperature of the evaporator coil T2 of the compressor starts running as Tcool. At first 5 minutes after starting the compressor, if T2
Alleged causes ● Defective T2 sensor
● Internal PCB is defective
● System problems, such as leaks or blockages.

Troubleshooting:

Troubleshooting

1.2.6 Diagnosis and current overload protection solution (F0)

Error code F0
Failure decision conditions An abnormal increase in current is detected by checking the specified current detection circuit.
Alleged causes ● Power problems
● System lock
● Defective PCB
● Wiring error
● Compressor malfunction

Troubleshooting:

Troubleshooting

1.2.7 IPM malfunction or diagnostics and too strong IGBT current protection solution (P0)

Error code P0
Failure decision conditions When the voltage signal sent by the IPM to the compressor control unit is abnormal, the display LED will display “P0” and the AC will turn off.
Alleged causes ● Wiring error
● IPM failure
● The outdoor fan is defective
● Compressor malfunction
● External PCB is defective

Troubleshooting:

Troubleshooting

> IPM continuity check

Turn off the power, allow the high capacity electrolytic capacitors to completely discharge and disassemble the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N.

Troubleshooting

1.2.8 Diagnosis and protection solution against overvoltage or overvoltage (P1)

Error code P1
Failure decision conditions An abnormal increase or decrease in voltage is detected by checking the specified voltage detection circuit.
Alleged causes ● Power problems.
● Leaking or blocking the system
● Defective PCB

Troubleshooting:

Troubleshooting

1.2.9 High temperature protection of IPM or compressor - diagnosis and solution (P2)

Error code P2
Failure decision conditions If the sampling voltage is not 5V, the LED will display the fault.
Alleged causes ● Power problems
● System leaks or blockages
● Defective PCB
● Connection problems

Troubleshooting:

Troubleshooting

Compressor high temperature protection:

Troubleshooting

Troubleshooting Air-to-water heat pumps

1.2.10 Inverter compressor unit error - diagnosis and solution (P4)

Error code P4
Failure decision conditions An abnormal unit of the inverter compressor is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation signal detection and so on.
Alleged causes ● Wiring error
● IPM failure
● The outdoor fan is defective
● Compressor malfunction
● External PCB is defective

Troubleshooting:

Troubleshooting

Checking the main parts

1. Check the temperature sensor

Disconnect the temperature sensor from the PCB, measure the resistance value with a tester.

Troubleshooting Air-to-water heat pumps

Temperature sensors.

  • Room temperature sensor (T1),
  • Inner coil temperature sensor (T2),
  • Outer coil temperature sensor (T3),
  • Outdoor ambient temperature sensor (T4),
  • Compressor discharge temperature sensor (T5).
  • Measure the resistance value of each winding using the multimeter.

Temperature sensor resistance value table for T1, T2, T3, T4 (° C --K)

° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm
. -4 115.266 20 68 12.6431 60 140 2.35774 100 212 0.62973
. -2 108.146 21 70 12.0561 61 142 2.27249 101 214 0.61148
. 0 101.517 22 72 11.5 62 144 2.19073 102 216 0.59386
. 1 96.3423 23 73 10.9731 63 145 2.11241 103 217 0.57683
. 3 89.5865 24 75 10.4736 64 147 2.03732 104 219 0.56038
. 5 84.219 25 77 10 65 149 1.96532 105 221 0.54448
. 7 79.311 26 79 9.55074 66 151 1.89627 106 223 0.52912
. 9 74.536 27 81 9.12445 67 153 1.83003 107 225 0.51426
. 10 70.1698 28 82 8.71983 68 154 1.76647 108 226 0.49989
. 12 66.0898 29 84 8.33566 69 156 1.70547 109 228 0.486
. 14 62.2756 30 86 7.97078 70 158 1.64691 110 230 0.47256
-9 16 58.7079 31 88 7.62411 71 160 1.59068 111 232 0.45957
-8 18 56.3694 32 90 7.29464 72 162 1.53668 112 234 0.44699
-7 19 52.2438 33 91 6.98142 73 163 1.48481 113 235 0.43482
-6 21 49.3161 34 93 6.68355 74 165 1.43498 114 237 0.42304
-5 23 46.5725 35 95 6.40021 75 167 1.38703 115 239 0.41164
-4 25 44 36 97 6.13059 76 169 1.34105 116 241 0.4006
-3 27 41.5878 37 99 5.87359 77 171 1.29078 117 243 0.38991
-2 28 39.8239 38 100 5.62961 78 172 1.25423 118 244 0.37956
-1 30 37.1988 39 102 5.39689 79 174 1.2133 119 246 0.36954
0 32 35.2024 40 104 5.17519 80 176 1.17393 120 248 0.35982
1 34 33.3269 41 106 4.96392 81 178 1.13604 121 250 0.35042
2 36 31.5635 42 108 4.76253 82 180 1.09958 122 252 0.3413
3 37 29.9058 43 109 4.5705 83 181 1.06448 123 253 0.33246
4 39 28.3459 44 111 4.38736 84 183 1.03069 124 255 0.3239
5 41 26.8778 45 113 4.21263 85 185 0.99815 125 257 0.31559
6 43 25.4954 46 115 4.04589 86 187 0.96681 126 259 0.30754
7 45 24.1932 47 117 3.88673 87 189 0.93662 127 261 0.29974
8 46 22.5662 48 118 3.73476 88 190 0.90753 128 262 0.29216
9 48 21.8094 49 120 3.58962 89 192 0.8795 129 264 0.28482
10 50 20.7184 50 122 3.45097 90 194 0.85248 130 266 0.2777
11 52 19.6891 51 124 3.31847 91 196 0.82643 131 268 0.27078
12 54 18.7177 52 126 3.19183 92 198 0.80132 132 270 0.26408
13 55 17.8005 53 127 3.07075 93 199 0.77709 133 271 0.25757
14 57 16.9341 54 129 2.95896 94 201 0.75373 134 273 0.25125
15 59 16.1156 55 131 2.84421 95 203 0.73119 135 275 0.24512
16 61 15.3418 56 133 2.73823 96 205 0.70944 136 277 0.23916
17 63 14.6181 57 135 2.63682 97 207 0.68844 137 279 0.23338
18 64 13.918 58 136 2.53973 98 208 0.66818 138 280 0.22776
19 66 13.2631 59 138 2.44677 99 210 0.64862 139 282 0.22231

Temperature sensor resistance value table for T5 (° C --K)

° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm
. -4 542.7 20 68 68.66 60 140 13.59 100 212 3.702
. -2 511.9 21 70 65.62 61 142 13.11 101 214 3.595
. 0 483 22 72 62.73 62 144 12.65 102 216 3.492
. 1 455.9 23 73 59.98 63 145 12.21 103 217 3.392
. 3 430.5 24 75 57.37 64 147 11.79 104 219 3.296
. 5 406.7 25 77 54.89 65 149 11.38 105 221 3.203
. 7 384.3 26 79 52.53 66 151 10.99 106 223 3.113
. 9 363.3 27 81 50.28 67 153 10.61 107 225 3.025
. 10 343.6 28 82 48.14 68 154 10.25 108 226 2.941
. 12 325.1 29 84 46.11 69 156 9.902 109 228 2.86
. 14 307.7 30 86 44.17 70 158 9.569 110 230 2.781
-9 16 291.3 31 88 42.33 71 160 9.248 111 232 2.704
-8 18 275.9 32 90 40.57 72 162 8.94 112 234 2.63
-7 19 261.4 33 91 38.89 73 163 8.643 113 235 2.559
-6 21 247.8 34 93 37.3 74 165 8.358 114 237 2.489
-5 23 234.9 35 95 35.78 75 167 8.084 115 239 2.422
-4 25 222.8 36 97 34.32 76 169 7.82 116 241 2.357
-3 27 211.4 37 99 32.94 77 171 7.566 117 243 2.294
-2 28 200.7 38 100 31.62 78 172 7.321 118 244 2.233
-1 30 190.5 39 102 30.36 79 174 7.086 119 246 2.174
0 32 180.9 40 104 29.15 80 176 6.859 120 248 2.117
1 34 171.9 41 106 28 81 178 6.641 121 250 2.061
2 36 163.3 42 108 26.9 82 180 6.43 122 252 2.007
3 37 155.2 43 109 25.86 83 181 6.228 123 253 1.955
4 39 147.6 44 111 24.85 84 183 6.033 124 255 1.905
5 41 140.4 45 113 23.89 85 185 5.844 125 257 1.856
6 43 133.5 46 115 22.89 86 187 5.663 126 259 1.808
7 45 127.1 47 117 22.1 87 189 5.488 127 261 1.762
8 46 121 48 118 21.26 88 190 5.32 128 262 1.717
9 48 115.2 49 120 20.46 89 192 5.157 129 264 1.674
10 50 109.8 50 122 19.69 90 194 5 130 266 1.632
11 52 104.6 51 124 18.96 91 196 4.849      
12 54 99.69 52 126 18.26 92 198 4.703      
13 55 95.05 53 127 17.58 93 199 4.562      
14 57 90.66 54 129 16.94 94 201 4.426      
15 59 86.49 55 131 16.32 95 203 4.294      
16 61 82.54 56 133 15.73 96 205 4.167      
17 63 78.79 57 135 15.16 97 207 4.045      
18 64 75.24 58 136 14.62 98 208 3.927      
19 66 71.86 59 138 14.09 99 210 3.812      

2. Checking the compressor

Measure the resistance value of each winding using the tester.

Troubleshooting