Technical manual - air-water heat pump

Congratulations!

You are the owner of a TMC HYPER-JET 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 over a long period of time. To use and maintain the product in optimal operating conditions, it is necessary to keep the manual.

ATTENTION !!!

WHEN STARTING THE HEAT PUMP, HAVE A DEVICE FOR MEASURING THE ELECTRICAL VOLTAGE AND A NON-CONTACT THERMOMETER.

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 work 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.

Environmental protection is a priority for the group TERMOCASA.

Product quality, efficiency and environmental protection, all these are equally important objectives for us. Environmental protection laws and regulations are strictly followed.

We use the best techniques and materials for environmental protection, while also taking into account economic points of view.

An easy-to-use heat pump

The TMC HYPER-JET heat pump uses as a primary source of heat capture the circuit with a deep, horizontal collector or groundwater 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.

Indoor unit: 1) Ambient sensors, 2) Heating agent inlet, 3) Heating agent outlet, 4) Refrigerant connections for modules 1,2,3,4,5) Thermostat(s) or smart home control, 6) Outdoor thermostat control (for the operation of modules in cascade), 7) 8) 9) 10) Communication cable outdoor units 1,2,3,4, 11) Recirculation pump supply, 12) Supply module ext.1, 13) Supply module ext.2, 14) Supply module ext.3, 15) Supply module ext.4, 16) Remote control IR communication.

Installation diagrams

Installation can be done either with the internal unit placed on top of the external 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 pipe (3), to block the flow of the refrigerant liquid and avoid the liquid returning 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

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.

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

DO NOT ALLOW THE SIGNAL CABLE TO INTERFER WITH OTHER CABLES. Using vinyl tape, secure electrical cables and refrigerant pipes. DO NOT WRAP THE PIPE ENDS 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 coiled connection of the refrigerant pipes and signal cables through the hole in the wall. When making a hole in the wall (minimum diameter 32mm) make sure that cables, pipes and other sensitive components are not touched, and that the inclination of the hole is towards the outside.

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.

INSTALLATION OF THE EXTERNAL UNIT

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

Before starting the installation, check that the external drive has been transported in an upright position. If this has not happened, position it correctly and wait at least two hours before starting it. If possible, place the unit away from rain and direct sunlight, in an area with sufficient ventilation. Place the unit in a location where there are no support problems and where vibration and noise cannot be amplified. Position it so that the operating noise and air flow 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 risk of water accumulation or falls, formation of ditches, etc. In areas with a lot of snow or where the temperature remains below 0°C for long periods, install the unit on a 20-30 cm cement base to prevent snow from accumulating around the unit. In winter, heat pumps produce condensation, which falls on the supporting surface, forming water deposits that are sometimes disturbing and/or unpleasant. To avoid this, use the condensation outlet connection kit as indicated in the corresponding paragraph. The air conditioning installation must not be surrounded by more than three walls, in order to ensure the ventilation necessary for proper operation.

Installation of the outdoor unit

Mount the external unit on a rigid support to prevent increased noise and vibration levels. To present weather shields for protection against sunlight and rain. Make sure there is no obstacle blocking the discharged air. Do not install near public access streets, crowded areas, or where the noise from the unit will disturb those around or near animals or plants that would be affected by the exhaust air, away from any source of flammable gases. If the unit is exposed to strong wind: 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 cover above the unit to protect the unit from rain or snow, otherwise the heat pump will perform repeated defrosts. 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 work with temperatures up to approximately 50°C on the return and returns on the circuit (tour) maximum temperatures of 65°C for short periods of time (0-3 hours for boiler water heating), and the operating temperature continues (normal) of the heat pump must not exceed 40 degrees Celsius on the return and 45 degrees Celsius on the heating medium.

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 in the circuit. Even the smallest air bubbles can affect the proper functioning of the product.
• After charging the heating system with liquid, check if there is a background noise from the pump, check if it has been completely bled.
• Add water/antifreeze if necessary to reach the correct pressure, i.e. 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.

The electrical and data transmission connection between the outdoor unit 1) and the indoor unit 4) is made with a cable according to the specifications below and each is connected to its counterpart (W , 1(L) , 2(N) , S and ground) as can be seen in image 2) and 3).

At the connection L, N and grounding in figure 2) connect the power supply cable to be connected to the socket behind the indoor unit corresponding to each module or inside the indoor unit to one of the four automatic fuses with the number corresponding to the outdoor module as can be seen in fig.5.

Please pay special attention to these electrical connections because if there are imperfect contacts then malfunctions can occur.

BEFORE CARRYING OUT THE ELECTRICAL CONNECTIONS, READ THESE REGULATIONS

All connections must comply with local and national codes and must be installed by a licensed electrician. All electrical connections must be made according to the Electrical Connections Scheme located on the panels of the internal and external units. If there is a serious safety problem with the power supply, stop operation immediately. Explain to the customer the reason for this interruption and refuse to install the unit until the safety reason has been properly resolved. The supply voltage must be between 97-100% of the nominal voltage. Insufficient power supply may cause malfunction, electric shock or fire. If the power supply is connected by fixed cables, install a surge protector and a switch on the main power supply with a capacity of 1,5 times the current of the unit. If the electrical supply is connected via fixed cables, a switch or a switch that disconnects all poles and has a separation contact of at least 3mm must be included in the fixed wiring. The unit should only be connected to an individual branch output 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: DISCONNECT THE MAIN ELECTRICAL POWER SUPPLY TO 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 cords for indoor units (if applicable): H05VV-F 5x4mmp or H05V2V2-F 3x4mmp
• Power cables for outdoor units: H07RN-F 3x4mmp
• Signal cable: H07RN-F 5×2,5mmp
• BE CAREFUL WITH THE PHASE CABLES! While crimping the cables, ensure that Live ("L") is clearly distinguished from the other cables and do not reverse the Live and Neutral cables. This would be dangerous and may 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 400V, uninterruptible power supply, protected with grounding.
If the voltage at the equipment's power outlet is not stable, it is recommended to check and fix the problem or use a voltage stabilizer that must be 4× the equipment's power, and capable of supporting the current and voltage at startup and during equipment operation.

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 return 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 large as possible so that the temperature of the heating agent (35-45 degrees Celsius per round) is sufficient for heating 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.

Caution!

The heat pump can only operate in stationary heating or domestic hot water mode if the outside temperature does not exceed 37 degrees Celsius, to protect the compressor from overheating. If the outside temperature exceeds 37 degrees Celsius, it is recommended to use the electric heater from the boiler to prepare domestic hot water.

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.

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.

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

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

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

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

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

Heat pump installation diagram 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) gravity direction flap, 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.

1) boiler, 2) DHW boiler (domestic hot water), 3) recirculation pump, 4) 3-way solenoid valve, 5) recirculation pump, 6) gravity damper, 7) solar panel, 8) recirculation pump, 9) building heating circuits, 10) accumulation tank (puffer)

Heat pump installation diagram 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.

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

RECOMMENDATIONS:

• The placement of the indoor unit will be done in spaces with a temperature between 10 and 25 degrees Celsius with a humidity level below 60%, to avoid the formation of condensation due to temperature differences, condensation that can damage the electrical and electronic equipment, it can also favor the occurrence of contacts imperfections and unforeseen short circuits. If there is underfloor heating in the technical room, it is recommended to place an insulating rubber mat under and around the indoor unit at least 30 cm away to avoid overheating or undercooling of the equipment.
• In heating circuits where heat pumps are used, it is recommended to avoid the use of mixing valves at the distributors in the building and to avoid the use of equalization cylinders on the hydraulic circuits.
• Recirculation pumps must be a minimum of 32-8 (connection 32, pressure 0,8 bar), Pedrollo JSW1C or more powerful (have fixed flow rates) and be set at maximum speed
• In the case of zone heating, it is recommended to use a puffer to avoid continuous operation of the heat pump.
• 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 checking the tightness of the connections and valves, it is mandatory to tighten all the freon valve caps with a key to prevent accidental leaks.
• 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 TMC 3-way valve can be installed both on the flow and on the return because we have temperatures below 60 degrees Celsius.

• 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 400v (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 there are no closed taps or the 3-way valve is not blocked in a position that blocks the passage of the heat agent.
• When starting the heat pump for the first time, it is recommended to use a normal socket to power the recirculation pump and the ground water pump, and after setting the thermostats (boiler and puffer), the pumps should be powered from the socket mounted on the heat pump housing.
• The temperature difference between flow (hot outlet) and return (hot inlet) must be approximately 5 degrees Celsius.
• The temperature difference between flow (cold outlet) and return (cold inlet) must be approximately 5 degrees Celsius.
• For accurate temperature measurement, a non-contact thermometer will be used and the reading will be performed on metal surfaces previously covered with 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 sqm for a 32kw pump,
  • 2,5 sqm for a 24kw pump,
  • 2 sqm for a 16kw pump,
  • 1,5 sqm for a 8kw pump.
• The hydraulic connections are made of 32mm PPR pipe, and you must have a maximum 3 bar safety valve installed on the two circuits.
• The pressure drop in the heat exchangers, which must be taken into account when sizing the drilling or recirculation pumps, is between 1 and 1,5 bar.
• If the puffer is not used, the temperature difference between the flow (hot outlet) and return (hot inlet) will be checked, and if it is greater than 7 degrees due to the undersizing of the home's heating system, then it will be used on the return a stronger recirculation pump or hydrophore pump if applicable.
• In the case of using radiators/radiators/fan coil units, they must have 1kw nominal power for every 3-5 m20 of heated building, i.e. for a 4 m6 room you need XNUMX-XNUMXkw (nominal power).

Indoor unit heat pump dimensions (UI):

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

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.

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

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

1. Indoor unit error display

1.2 Troubleshooting

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

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.

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:

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:

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.

DC motor voltage input and output

No.	Color	Signal	Voltage
1	Red	Vs / Vm	280V to 400V
2	-	-	-
3	Black	GND	0V
4	White	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 circuit or short circuit – diagnosis 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:

1.2.5 Refrigerant leak detection – 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:

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:

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:

> 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.

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:

1.2.9 IPM or Compressor High Temperature Protection – 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:

Compressor high temperature protection:

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:

Checking the main parts

1. Check the temperature sensor

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

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
-20	-4	115.266	20	68	12.6431	60	140	2.35774	100	212	0.62973
-19	-2	108.146	21	70	12.0561	61	142	2.27249	101	214	0.61148
-18	0	101.517	22	72	11.5	62	144	2.19073	102	216	0.59386
-17	1	96.3423	23	73	10.9731	63	145	2.11241	103	217	0.57683
-16	3	89.5865	24	75	10.4736	64	147	2.03732	104	219	0.56038
-15	5	84.219	25	77	10	65	149	1.96532	105	221	0.54448
-14	7	79.311	26	79	9.55074	66	151	1.89627	106	223	0.52912
-13	9	74.536	27	81	9.12445	67	153	1.83003	107	225	0.51426
-12	10	70.1698	28	82	8.71983	68	154	1.76647	108	226	0.49989
-11	12	66.0898	29	84	8.33566	69	156	1.70547	109	228	0.486
-10	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
-20	-4	542.7	20	68	68.66	60	140	13.59	100	212	3.702
-19	-2	511.9	21	70	65.62	61	142	13.11	101	214	3.595
-18	0	483	22	72	62.73	62	144	12.65	102	216	3.492
-17	1	455.9	23	73	59.98	63	145	12.21	103	217	3.392
-16	3	430.5	24	75	57.37	64	147	11.79	104	219	3.296
-15	5	406.7	25	77	54.89	65	149	11.38	105	221	3.203
-14	7	384.3	26	79	52.53	66	151	10.99	106	223	3.113
-13	9	363.3	27	81	50.28	67	153	10.61	107	225	3.025
-12	10	343.6	28	82	48.14	68	154	10.25	108	226	2.941
-11	12	325.1	29	84	46.11	69	156	9.902	109	228	2.86
-10	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