Toshiba HWS-P805XWHM3-E, HWS-P805XWHT6-E, HWS-P805XWHT9-E, HWS-P1105XWHT6-E, HWS-P1105XWHT9-E Service Manual

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Page 1

AIR TO WATER HEAT PUMP

Service Manual

Model name:

FILE No. A10-1705

Hydro unit

HWS-P805XWHM3-E(TR) HWS-P805XWHT6-E(TR) HWS-P805XWHT9-E HWS-P1105XWHM3-E(TR) HWS-P1105XWHT6-E(TR) HWS-P1105XWHT9-E(TR)

Outdoor unit

HWS-P805HR-E(TR) HWS-P1105HR-E(TR)

Page 2

1 Safety precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Refrigerant (R410A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2-1.Safety during installation and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2-2.Installing refrigerant pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2-2-1.Steel pipe and joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2-2-2.Processing of piping materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2-3.Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2-3-1.Necessary tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2-4.Recharging of refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2-5.Brazing of pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2-5-1.Materials of brazing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2-5-2.Flux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2-5-3.Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4 Outside drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4-3.Hot water cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5 Wiring diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5-3.Hot water cylinder unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6 Key electric component rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6-3.Hot water cylinder unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6-4.Water heat exchange control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6-5.Outdoor control board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7 Refrigeration cycle / Water system diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7-1.Water system diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7-2.Refrigeration cycle system diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8 Operational description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Page 3

9 Method of defect diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9-1.Matters to be confirmed first. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9-1-1.Check the power supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9-1-2.Check for any miswiring of the connection cables between the hydro unit and the outdoor unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9-1-3.About the installation of the temperature sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9-2.Non-defective operation (program operation) … No fault code display appears.. . . . . . . . . . . . . . 72

9-3.Outline of the determination diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9-3-1.Procedure of defect diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9-3-2.How to determine from the check code on the remote controller . . . . . . . . . . . . . . . . . . . 73

9-3-3.How to cancel a check code on the remote controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9-3-4.How to diagnose by error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9-4.Diagnosis flow chart for each error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

9-4-1.Hydro unit failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

9-4-2.Outdoor unit failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

9-4-3.Temperature sensor, temperature-resistance characteristic table . . . . . . . . . . . . . . . . . 113

9-5.Operation check by PC board switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

9-5-1.Operation check mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

9-6.Brief method for checking the key components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

9-6-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

9-6-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

10 Hydro unit and outdoor unit settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

11 Replacement of the service PC board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

12 How to exchange main parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

13 For cooling installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

14 Periodic inspection items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

15 Part exploded view, part list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Page 4

1 Safety precautions

The unit and this service guide list very important safety precautions. Understand the following details (indications and symbols) before reading the body text, and follow the instructions.

[About indication]

Indication Meaning of Indication

DANGER

WARNING

CAUTION

* Property damage indicates extended damage to property, furniture, livestock, or pets.

Indicates that a wrong operation may cause a service engineer and the third persons around to get fatal or serious injuries.

Indicates that a wrong operation may cause a service engineer and the third persons around to get fatal or serious injuries, or that unit defective after the operation may cause a user to have a similar serious accident.

Indicates that a wrong operation may cause a service engineer and the third persons around to get injuries or may cause property damage*, or that unit defective after the operation may cause a user to have a similar accident.

[About symbols]

Symbols Meaning of Symbols

Indicates a forbidden action. Specific forbidden actions are described in text near the symbol.

Indicates a forcible (must do) action. Specific forcible actions are described in text near the symbol.

Indicates a caution (including danger and warning). Specific cautions are described in picture or text inside or near the symbol.

DANGER

<Turn off the power breaker> Turn off the power breaker before removing the front panel and cabinet.

• Failure to do so may cause a high voltage electric shock, leading to death or injury.

• During an operation, the second side circuit of high pressure transmission(*) are applied with a high voltage of 230 V or higher.

• Touching the circuit even with an electrical insulator, let alone a bare hand or body, causes an electric shock.

∗: For details, see the schematic.

<Discharge between terminals> When the front panel and cabinet are removed, make short-circuit current to discharge between high pressure

capacitor terminals.

• Failure to do so may cause a high voltage electric shock, leading to death or injury.

• After the power is turned off, the high pressure capacitor is still charged with high voltage.

<Forbidden> Do not turn on the power breaker after removing the front panel cabinet.

• Failure to do so may cause a high voltage electric shock, leading to death or injury.

WARNING

<Check earth ground> Before starting failure diagnosis or repair, check that the earth wire (∗) is connected to the unit ground terminal.

• An unconnected earth wire could cause an electric shock if electric leakage occurs.

• If the earth ground is not properly connected, ask an electrical worker for rework of the ground connection.

∗: Earth wire of class D grounding

Page 5

WARNING

<No modification> Do not modify the unit.

• Do not disassemble or modify the parts also.

• A fire, an electric shock, or an injury may occur.

<Use specified parts> Use the specified parts (∗) when replacing them.

• Using parts other than specified ones may cause a fire or an electric shock.

∗: For details, see the parts price list.

<Keep children away from unit> Keep any person (including children) other than service engineers away from a failure diagnosis or repairing place.

• A tool or disassembled parts may cause an injury.

• Advise the customer to keep the third persons (including children) away from the unit.

<Insulation treatment> After connecting a cut lead with a crimp contact, discharge by facing the closed side upward.

• Connect lead wires with crimping terminals and turn the closed end upwards to avoid exposure to water.

<Watch out for fire> Observe the following instructions when repairing the refrigerant cycle.

(1) Watch out for surrounding fire. Always put out the fire of stove burner or other devices before starting the repair.

Should the fire fail to be put out, the oil mixed with refrigerant gas could catch fire.

(2) Do no use a welder in a closed room.

A room with no ventilation may cause carbon monoxide poisoning.

(3) Keep away flammable materials.

The materials may catch the fire of a welder.

<Use refrigerant carefully> Check the refrigerant name to use the tools and members appropriate for the refrigerant.

• A product using the refrigerant R410A has the refrigerant name prominently displayed on its outdoor unit. In addition, the diameter of the service port is changed from that of the conventional R22 to prevent incorrect filling.

Never use refrigerant other than R410A for Air to Water Heat Pump using R410A. Also, never use R410A for Air to Water Heat Pump using other refrigerant (such as R22).

• A mixture of R410A with different ones excessively raises the pressure in the refrigerant cycle, leading to an injury due to burst.

Do not make additional charge of the refrigerant.

• An additional charge when refrigerant gas leaks changes the refrigerant composition in the refrigerant cycle, causing the characteristics change of the Air to Water Heat Pump or excessive high pressure in the refrigerant cycle with more than the specified amount of refrigerant charged. This may cause burst or an injury. If the refrigerant gas leaks, perform refrigerant recovery or other operation to make the Air to Water Heat Pump contain no refrigerant, and then perform vacuuming. After that, refill the unit with the defined amount of liquid refrigerant. Never charge refrigerant exceeding the amount specified.

When the refrigerant cycle is refilled with refrigerant, do not enter air or refrigerants other than the specified refrigerant, R410A.

• A mixture of R410A with air or an inappropriate substance causes excessive high pressure inside the refrigerant cycle, leading to an injury due to burst.

Check that there is no refrigerant gas leak after the installation is completed.

• If it catches fire of a fan heater, a space heater, or a stove, poisonous gases may be produced.

<Be careful with wiring> After a repair is completed, be sure to reassemble the parts and put the wiring back to its original state. In addition,

be careful with the internal wiring not to be caught in a cabinet or panel.

• A defective assembly or wiring may cause a disaster at a customer site due to electrical leakage or a fire.

<Check for water leak> After the repair of a water pathway is completed, check that there is no water leak.

• In using the product, water leak may cause a fire at a customer site due to electrical leakage or an electric shock.

Page 6

WARNING

<Check insulation> After the work is completed, check with an insulating-resistance tester (500V) that the insulation resistance between

the live and dead-metal parts is 2 MΩ or higher.

• A low insulation resistance may cause a disaster at a customer site due to electrical leakage or an electric shock.

<Ventilate> Ventilate if refrigerant gas leaks during service work.

• Should refrigerant gas catch fire, poisonous gases may be produced. A closed room full of leaking refrigerant results in the absence of oxygen; it is dangerous. Make sure to ventilate.

<Caution: electric shock> When checking a circuit while energized if necessary, use rubber gloves not to contact the live part.

• Contact with the live part may cause an electric shock.

• The unit contains high-voltage circuits. Contact with a part in the control board with your bare hand may cause an electric shock. Take enough care to check circuits.

<Turn off the power breaker> Because the electrical components are energized with high voltage, always turn off the power breaker before

starting to work.

• Failure to do so may cause an electric shock.

<Always do> Should refrigerant gas leak, find where the gas leaks and properly repair it.

• To stop the repair work because the leakage location cannot be identified, perform refrigerant recovery and close the service valve. Failure to do so may cause the refrigerant gas to leak in a room. Although refrigerant gas alone is harmless, if it catches fire of a fan heater, a space heater, or a stove, poisonous gases may be produced.

When installing the unit or re-installing it after relocation, follow the installation guide for proper operation.

• A defective installation may cause a refrigerant cycle defective, a water leak, an electric shock, or a fire.

<Check after repair> After a repair is completed, check for any abnormality.

• Failure to do so may cause a fire, an electric shock, or an injury.

• Turn off the power breaker to perform check.

After a repair is completed (and the front panel and cabinet are placed), make a test run to check for any abnormality such as smoke or abnormal sound.

• Failure to do so may cause a fire or an electric shock. Place the front panel and cabinet before making a test run.

<Check after re-installation> Check that the following are properly performed after re-installation.

(1) The earth wire is properly connected. (2) The installation is stable without any tilt or wobbles.

Failure to check them may cause a fire, an electric shock, or an injury.

CAUTION

<Wear gloves> Wear gloves (∗) when performing repair.

• Failure to do so may cause an injury when accidentally contacting the parts.

∗: Thick gloves such as cotton work gloves

<Cooling check> Perform service work when the unit becomes cool enough after the operation.

• High temperature of compressor piping or other equipment after a cooling or heating operation may cause burn.

<Tighten with torque wrench> Tighten a flare nut with a torque wrench in the specified method.

• A flare nut tightened too much might crack after a long period, causing refrigerant leak.

Page 7

2 Refrigerant (R410A)

This Air to Water Heat Pump adopts a refrigerant HFC (R410A) to prevent destruction of the ozone layer. The working pressure of R410A refrigerant is 1.6 times higher than that of the conventional refrigerant R22.The

refrigerant oil is also changed for the new refrigeration. Therefore, during installation or service work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter the refrigerant cycle of the new type refrigerant Air to Water Heat Pump. A wrong installation or service operation may cause a serious accident. Read carefully the following instructions to use the tools or members for R410A for safety work.

2-1. Safety during installation and service

• Use only the refrigerant R410A for Air to Water Heat Pump using R410A. A mixture of R410A with different ones excessively raises the pressure in a refrigerant cycle, leading to an injury due to burst.

• Check the refrigerant name to use the tools and members appropriate for the refrigerant. A product using the refrigerant R410A has the refrigerant name prominently displayed on its outdoor unit. In addition, the diameter of the service port is changed from that of the conventional R22 to prevent incorrect filling.

• Ventilate if refrigerant gas leaks during service work. Should refrigerant gas catch fire, poisonous gases may be produced. A closed room full of leaking refrigerant results in the absence of oxygen; it is dangerous. Make sure to ventilate.

• When the refrigerant cycle is refilled with refrigerant, do not mix air or refrigerants other than the specified refrigerant, R410A. A mixture of R410A with air or an inappropriate substance causes excessive high pressure inside the refrigerant cycle, leading to an injury due to burst.

• Check that no refrigerant gas leaks after the installation is completed. Should a refrigerant gas leak in a room and catch fire, poisonous gases may be produced.

• When installing the unit that contains large amount of refrigerant such as Air to Water Heat Pump, take measures to prevent the refrigerant from exceeding the threshold concentration in case it leaks. Should leaking refrigerant exceed the threshold concentration could cause an accident due to oxygen deficient.

• When installing the unit or re-installing it after relocation, follow the installation guide for proper operation. A defective installation may cause a refrigerant cycle defective, a water leak, an electric shock, or a fire.

• Do not modify the product. Do not disassemble or modify the parts also. A fire, an electric shock, or an injury may occur.

Page 8

2-2. Installing refrigerant pipe

2-2-1. Steel pipe and joint

For refrigerant piping, steel pipe and joints are mainly used. Select those comply with JIS (Japanese Industrial Standards) for a service work. Also, use such clean piping materials that less impurities attach to the inside of pipe and joints.

Copper pipe

Use copper pipe of the “copper and copper alloy seamless pipe” type with attach oil quantity of 40 mg / 10 m or less. Do not use pipe that is cracked, distorted, or discoloured (especially inside).The expansion valve or capillary may get clogged with impurities. Considering that Air to Water Heat Pump using R410A is higher in pressure than those using the conventional R22, be sure to select the material that comply with the standard. Table 2-1 shows the thickness of copper pipe used for R410A. Never use commercially available thin-walled copper pipe of 0.8 mm thick or less.

Table 2-1 Wall thickness of copper pipe

Wall thickness (mm)

Nominal diameter Outer diameter R410A

3/8 9.52 0.80

5/8 15.88 1.00

Joints

For the joint of copper pipe, flared joint and socket joint are used. Remove impurities from a joint before using it.

• Flared joint A flared joint cannot be used for the copper pipe whose outer diameter is 20 mm or larger. A socket joint can be used instead in that case. Table 2-2-3 and 2-2-4 show the dimensions of flare pipe, the end of flared joint, and flare nuts.

• Socket joint A socket joint is used to connect the thick-walled pipe of mainly 20 mm or larger in diameter. Table 2-2 shows the wall thickness of socket joints.

Table 2-2 The minimum wall thickness of socket joints

Nominal diameter

3/8 9.52 0.80

5/8 15.9 1.00

Reference of outer diameter of

copper pipe connected (mm)

Minimum joint wall thickness

(mm)

Page 9

2-2-2. Processing of piping materials

Figure 2-2-1 Flare dimension

DCB A

45° - 46°

43° - 45°

When installing refrigerant pipe, prevent water or dust from entering the pipe, and do not use oil other than lubricant used for Air to Water Heat Pump. Make sure that no refrigerant leak occurs.

If piping needs lubrication, use lubricating oil whose water content is removed. After the oil is put in, be sure to seal the container with air proof cover or other covers.

Flare and precautions

1) Cut a pipe.

Cut slowly with a pipe cutter so that the pipe is not distorted.

2) Remove burr and flaw.

A burr or flaw in a flare part may cause refrigerant leak. Remove carefully all the burrs, and clean up the cut ends before installation.

3) Insert a flare nut.

4) Flare

Check that the clasps and copper pipe are clean. Flare correctly using the clasp. Use a flare tool for R410A or the conventional one. Flare processing dimension varies depending on the flare tool type. When using the conventional flare tool, use a gauge for size adjustment to secure the A dimension.

Table 2-2-3 Flare processing related dimension for R410A

Nominal diameter

3/8 9.52 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5

5/8 15.9 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.5

Outer diameter

(mm)

Wall thickness

(mm)

Flare tool for R410A

clutch type

Table 2-2-4 Dimension of flare for R410A and flare nut

Nominal

diameter

3/8 9.52 0.8 13.0 13.2 9.7 20 18

5/8 15.9 1.0 19.1 19.7 15.9 24.5 26

Outer diameter

(mm)

Wall thickness

(mm)

ABCD

Dimension (mm)

Figure 2-2-2 Relationship between flare nut and flare surface

A (mm)

Conventional flare tool

Clutch type Butterfly-nut type

Flare nut width

(mm)

Page 10

Flare connecting procedure and precautions

NOTE

1) Make sure that the flare and connecting portions do not have any flaw and dust.

2) Correctly align the flared surface and the connecting axis.

3) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is the same as that for the conventional R22. If the torque is weak, gas leakage may occur. If it is too strong, the flare nut may crack and may be made non-removable. When choosing the tightening toque, comply with values designated by products. Table 2-2-5 shows reference values.

When applying oil to the flare surface, be sure to use oil designated by the product. Using any other oil deteriorates the lubricating oil, possibly causing the compressor to burn out.

Table 2-2-5 Tightening torque of flare for R410A (Reference values)

Nominal diameter Outer diameter (mm) Tightening torque N•m (kgf•m)

3/8 9.52 33 to 42 (3.3 to 14.2)

5/8 15.9 66 to 82 (6.8 to 8.2)

Page 11

2-3. Tools

2-3-1. Necessary tools

In Air to Water Heat Pump using R410A, the service port diameter of packed valve of the outdoor unit is changed to prevent mixing of other refrigerant. To reinforce the pressure resistance, flare dimensions and opposite side dimensions of flare nut (For Ø 12.7 copper pipe) of the refrigerant piping are lengthened.

Because the refrigerating machine oil is changed, mixing of oil may generate sludge, clog capillary, or cause other problems. Accordingly, the tools to be used include:

• tools dedicated for R410A (Those that cannot be used for the conventional refrigerant, R22)

• tools dedicated for R410A, but can be also used for the conventional refrigerant, R22

• tools that can be used for the conventional refrigerant, R22. The following table shows the tools dedicated for R410A and their interchangeability.

Tools dedicated for R410A (The following tools must be for R410A)

Tools whose specifications are changed for R410A and their interchangeability

R410A Air to Water Hear Pump

No. Tool to be used Usage

1 Flare tool Pipe flaring Yes *(Note 1) Yes

3 Torque wrench (For Ø15.9) Connection of flare nut Yes No No

4 Gauge manifold

5 Charge hose

6 Vacuum pump adapter Vacuum evacuating Yes No Yes

8 Refrigerant cylinder Refrigerant charge Yes No No

9 Leakage detector Gas leakage check Yes No Yes

10 Charging cylinder Refrigerant charge *(Note 2) No No

Copper pipe gauge for

adjusting projection margin

Electrical balance for

refrigerant charging

Flaring by conventional

flare tool

Evacuating, refrigerant

charge, run check, etc.

Refrigerant charge Yes No Yes

For R410A

Existence of new

equipment

installation

Conventional

equipment can be

used

Yes *(Note 1) *(Note 1)

Yes No No

Conventional refrigerant

Air to Water Heat Pump

installation

New equipment can be

used with conventional

refrigerant

* (Note 1) Flaring for R410A by using the conventional flare tool requires projection margin adjustment. This

adjustment requires copper pipe gauge or other instrument.

* (Note 2) A charging cylinder for R410A is currently under development.

General tools (Conventional tools are available)

In addition to the above dedicated tools, the following equipment also available for R22 is necessary as the general tools.

1. Vacuum pump Use this by attaching vacuum pump

adapter.

4. Reamer 9. Hole core drill (Ø65)

5. Pipe bender 10. Hexagon wrench (Opposite side 4 mm)6. Level vial

2. Torque wrench (For Ø6.35) 7. Screwdriver (+, –) 11. Tape measure

3. Pipe cutter 8. Spanner or Monkey wrench 12. Metal saw

Also prepare the following equipment for other work methods or run check.

1. Clamp meter 3. Insulation resistance meter

2. Thermometer 4. Electroscope

Page 12

2-4. Recharging of refrigerant

NOTE

(For refrigerant charging, see the figure below)

Recover the refrigerant, and check that no refrigerant remains in the refrigerant cycle.

Connect the charge hose to packed valve service port on the outdoor unit's gas side.

Connect the charge hose to the vacuum pump adapter.

Open fully both packed valves on the liquid and gas sides.

Open fully the handle of gauge manifold Lo, turn on the vacuum pump, and then perform vacuum evacuating.

When the compound gauge's pointer indicates

-0.1 MPa (-76 cmHg), close fully the handle Lo and turn off the vacuum pump.

Let the equipment stay as it is for one to two minutes and check that the compound gauge pointer does not return.

Place the refrigerant cylinder to the electronic balance, connect the connecting hose to the cylinder and the connecting port of the electronic balance, and then charge liquid refrigerant.

(Hydro unit)

(Outdoor unit)

Open

Service port

Check valve

Open/close valve for charging

Electronic balance for refrigerant charging

CloseOpen

Refrigerant cylinder (with siphon)

Recharge, if necessary, the specified amount of new refrigerant according to the following procedure.

• Never charge refrigerant exceeding the specified amount.

• If the specified amount of refrigerant cannot be charged, charge it a little at a time while running refrigerant recovery (pump down).

• Do not make additional charging. An additional charge when refrigerant leaks changes the refrigerant composition in the refrigerant cycle, causing the characteristics change of the Air to Water Heat Pump or excessive high pressure in the refrigerant cycle with more than the specified amount of refrigerant charged. This may cause burst or an injury.

Fig. 2-4-1 Configuration of refrigerant charging

Page 13

NOTE

• Make sure that the setting is appropriate so that liquid can be charged.

NOTE

[Cylinder with siphon]

[Cylinder without siphon]

Gauge manifold

Outdoor unit

Refrigerant cylinder

Electronic balance

Gauge manifold

Outdoor unit

Refrigerant cylinder

Electronic balance

Siphon pipe

• A cylinder with siphon enables liquid to be charged without the cylinder turned upside down.

• Because R410A is HFC mixed refrigerant, charging with gas changes the charged refrigerant composition, causing the equipment characteristics to change.

Page 14

2-5. Brazing of pipes

NOTE

2-5-1. Materials of brazing

Silver brazing metal

Silver brazing metal is an alloy mainly composed of silver and copper.

It uses iron, copper, or copper alloy, and is relatively expensive though it excels in soldering.

Phosphor bronze brazing metal

Phosphor bronze brazing metal is generally used to join copper or copper alloy.

Low temperature brazing metal

Low temperature brazing metal is generally called solder, and is an alloy of tin and lead. Do not use it for refrigerant piping because its adhesive capacity is low.

• Phosphor bronze brazing metal tends to react with sulfur, producing a fragile compound water solution. This may cause gas leakage. Therefore, use other type of brazing metal at a hot spring resort or similar place, and coat the surface with coatings.

• To braze the pipe again while performing service work, use the same type of brazing metal.

2-5-2. Flux

Type of flux

• Non-corrosive flux It is generally a compound of borax and boric acid. It is effective when brazing temperature is higher than 800 °C.

• Active solvent Most of this type of flux is generally used for silver brazing. It features the increase of oxide film while moving the capability to the borax-boric acid compound to add compounds such as potassium fluoride, potassium chloride, or sodium fluoride.

Piping materials for brazing and brazing metal / flux

Piping material

Copper - Copper Phosphor copper Do not use

Copper - Iron Silver Paste flux

Iron - Iron Silver Vapour flux

• Do not enter flux into the refrigerant cycle.

• If chlorine contained in the flux remains within the pipe, the lubricating oil deteriorates. Because of this, use a flux that does not contain chlorine.

• When adding water to the flux, use water that does not contains chlorine. (e.g. distilled water or ionexchange water)

• Remove the flux after brazing.

Brazing metal to be

used

Flux to be used

Why flux is necessary

• Removing all the oxide film and any foreign matter on the metal surface assists the flow of brazing metal.

• Flux prevents the metal surface from being oxidized in the course of brazing.

• Reducing the brazing metal's surface tension enables the brazing metal to adhere for better metal processing.

Characteristics of flux

• The activation temperature of flux matches the brazing temperature.

• A wide effective temperature range makes flux hard to carbonize.

• It is easy to remove slag after brazing.

• The corrosive action to the treated metal and brazing metal is minimum.

• The good performance of flux gives no harm to a human body. Since flux works in a complicated manner as described above, select an appropriate type of flux according to metal treatment type, brazing metal and brazing method, or other conditions.

2-5-3. Brazing

Brazing must be performed by a person qualified and experienced with theoretical knowledge since the operation requires sophisticated techniques. Perform brazing while flowing dry nitrogen gas (N2) to prevent oxide film from forming during brazing application to the inside of the pipe.

• Never use gas other than nitrogen gas.

Brazing method to prevent oxidation

1) Attach a reducing valve and a flow meter to the nitrogen cylinder.

2) Use a copper pipe to direct the piping material, and attach the flow meter to the balance.

3) Apply a mark to the clearance between the piping material and the copper pipe filled with nitrogen to prevent the back flow of the nitrogen gas.

4) If the nitrogen gas flows out, be sure to keep open the piping end.

Page 15

5) Use the reducing valve to adjust the nitrogen

Flow meter

Stop valve

From nitrogen cylinder

Nitrogen gas

Robber plug

Pipe

Nitrogen gas cylinder

gas flow speed to 0.05 m

(0.2 kgf/cm

/hour or 0.02 MPa

6) After the steps above, keep the nitrogen gas flowing until the pipe cools down to a certain extent. (Temperature where the pipe is cool enough to be touched by hands)

7) Remove the flux completely after brazing.

Fig 2-5-1 Prevention of oxidation during brazing

Page 16

3 Specifications

Unit name Hydro unit HWS-P805XWHM3-E, P805XWHT6-E, P805XWHT9-E

Heating capacity *1 (kW) 8.0

Cooling capacity *2 (kW) 6.0

Variable range of compressor frequency 10 - 70 Hz

Power source Single phase 50 Hz 220-230 V

Operation mode Heating Cooling

Electric characteristic *1 *2 Hydro unit Current (A) 0.44 0.44

Operating noise sound power level Hydro unit (dB (A)) 41

Coefficient of performance *1 *2 4.76 3.66

Hydro unit Outer dimension Height (mm) 925

Outdoor unit Outer dimension Height (mm) 1340

Refrigerant piping Connection method Flare connection

Refrigerant Refrigerant name R410A

Water piping Pipe diameter R1 1/4

Operating temperature range Hydro unit (°C) *5 (Cooling / Heating / Hot water) 5-32 / 5-32 / 5-32

Operating humidity range Hydro unit (%) 15-85

Wiring connection Power wiring 3 wires: including earth wire (Outdoor unit)

*1 Heating performance measurement conditions: outside air temperature 7 °C, water supply temperature 30 °C, outlet temperature 35 °C, refrigerant piping length 7.5 m (no height

difference).

*2 Cooling performance measurement conditions: outside air temperature 35 °C, water supply temper ature 12 °C, outlet temperature 7 °C, refrigerant piping length 7.5 m (no height

difference).

*3 • The remote controller should be shipped with the hydro unit.

• Use two 1.5-meter wires to connect the hydro unit with the remote controller. *4 Check the water piping for leakage under the maximum operating pressure. *5 Do not leave the hydro unit at 5 °C or below.

Outdoor unit HWS-P805HR-E

Power (kW) 0.06 0.06

Outdoor unit Current (A) 7.57 7.39

Total Running current (A) 8.01 7.83

Outdoor unit (dB (A)) 66

Net weight (kg) 49

Color Silky shade (Munsell 1Y8.5/0.5)

Remote controller Outer dimension *3

Circulation pump Motor output (W) 125 (MAX)

Heat exchanger Plate-type heat exchange

Net weight (kg) 92

Color Silky shade (Munsell 1Y8.5/0.5)

Compressor Motor output (W) 2500

Fan motor Standard air capacity (m

Hydro unit Liquid Ø9.52

Outdoor unit Liquid Ø9.52

Maximum length (m) 30

Maximum chargeless length (m) 30

Maximum height difference (m) ±30

Minimum length (m) 5

Charge amount (kg) 2.7

Maximum length (m) None (Need the flow rate 13 /min or more)

Maximum height difference (m) ±7

Maximum working water pressure (kPa) *4 430

Outdoor unit (°C) (Cooling / Heating / Hot water) 10-43 / -25-25 / -25-43

Outdoor unit (%) 15-100

Connecting line 4 wires: including earth wire

Power factor (%) 59.3 59.3

Power (kW) 1.62 1.58

Power factor (%) 93 93

Width (mm) 525

Depth (mm) 355

Height (mm) 120

Width (mm) 120

Depth (mm) 16

Flow rate (L/min) 22.9 17.2

Type Non-self-suction centrifugal pump

Width (mm) 900

Depth (mm) 320

Type Twin rotary type with DC-inverter variable speed control

Model DA422A3F-26M

Motor output (W) 100 × 2

Gas Ø15.9

/min) 103.0

Page 17

Unit name Hydro unit HWS-P1105XWHM3-E, P1105XWHT6-E, P1105XWHT9-E

Heating capacity *1 (kW) 11.2

Cooling capacity *2 (kW) 10.0

Variable range of compressor frequency 10 - 90 Hz

Power source Single phase 50 Hz 220-230 V

Operation mode Heating Cooling

Electric characteristic *1 *2 Hydro unit Current (A) 0.66 0.66

Operating noise sound power level Hydro unit (dB (A)) 43

Coefficient of performance *1 *2 4.88 3.00

Hydro unit Outer dimension Height (mm) 925

Outdoor unit Outer dimension Height (mm) 1340

Refrigerant piping Connection method Flare connection

Refrigerant Refrigerant name R410A

Water piping Pipe diameter R1 1/4

Operating temperature range Hydro unit (°C) *5 (Cooling / Heating / Hot water) 5-32 / 5-32 / 5-32

Operating humidity range Hydro unit (%) 15-85

Wiring connection Power wiring 3 wires: including earth wire (Outdoor unit)

*1 Heating performance measurement conditions: outside air temperature 7 °C, water supply temperature 30 °C, outlet temperature 35 °C, refrigerant piping length 7.5 m (no height

difference).

*2 Cooling performance measurement conditions: outside air temperature 35 °C, water supply temper ature 12 °C, outlet temperature 7 °C, refrigerant piping length 7.5 m (no height

difference).

*3 • The remote controller should be shipped with the hydro unit.

Outdoor unit HWS-P1105HR-E

Power (kW) 0.09 0.09

Outdoor unit Current (A) 10.33 14.99

Total Running current (A) 10.99 15.65

Outdoor unit (dB (A)) 66

Net weight (kg) 52

Color Silky shade (Munsell 1Y8.5/0.5)

Remote controller Outer dimension *3

Circulation pump Motor output (W) 190 (MAX)

Heat exchanger Plate-type heat exchange

Net weight (kg) 92

Color Silky shade (Munsell 1Y8.5/0.5)

Compressor Motor output (W) 2500

Fan motor Standard air capacity (m3/min) 103.0

Hydro unit Liquid Ø9.52

Outdoor unit Liquid Ø9.52

Maximum length (m) 30

Maximum chargeless length (m) 30

Maximum height difference (m) ±30

Minimum length (m) 5

Charge amount (kg) 2.7

Maximum length (m) None (Need the flow rate 18 /min or more)

Maximum height difference (m) ±7

Maximum working water pressure (kPa) *4 430

Outdoor unit (°C) (Cooling / Heating / Hot water) 10-43 / -25-25 / -25-43

Outdoor unit (%) 15-100

Connecting line 4 wires: including earth wire

Power factor (%) 59.2 59.2

Power (kW) 2.21 3.24

Power factor (%) 93 94

Width (mm) 525

Depth (mm) 355

Height (mm) 120

Width (mm) 120

Depth (mm) 16

Flow rate (L/min) 32.1 28.9

Type Non-self-suction centrifugal pump

Width (mm) 900

Depth (mm) 320

Type Twin rotary type with DC-inverter variable speed control

Model DA422A3F-26M

Motor output (W) 100 × 2

Gas Ø15.9

Page 18

4 Outside drawing

4040

4-1. Hydro unit

HWS-P805XWHM3-E, P805XWHT6-E, P805XWHT9-E

HWS-P1105XWHM3-E, P1105XWHT6-E, P1105XWHT9-E

525

2-dia.12x17 long hole

371.5

355

(for dia.8-10 anchor bolt)

B leg part

92054

72.5 72.5

2020

960

Anchor bolt long hole pitch

380

Anchor bolt

long hole pitch

19.5

352

Manometer

Remote controller

A leg part

Drain nipple

Water inlet connecting pipe 1 1/4"

259

2-dia.12x17 U-shape hole

(for dia.8-10 anchor bolt)

309.5

11619.5

Hot water outlet

connecting pipe 1 1/4"

135.5

186.5

158

37.5

Gas line dia.15.88

Liquid line dia.9.52

59.5144.5

Page 19

4-2. Outdoor unit

600

170

380

200

17.5

128118

383

150

17.5 365

1340

320

55 95

151

400

55 95

135

155

613

605

900

70 581

581

178 178 178

518

52 550

360

655

327

534

121

534

43.5

5-Drain hole

( 20 88 burring hole)

Air intake

Air

discharge

Portion A

Portion B

Drain hole ( 25 burring hole)

Mounting bolt hole

( 12 17 long hole)

Details of portion A

Details of portion B

Mounting bolt hole

( 12 17 U-shape hole)

Description

Name

Refrigerant piping outlet

Hydro and outdoor

connecting line outlet

Power source intake hole

38 knockout hole

Refrigerant liquid

connection

( 9.5 flare)

Refrigerant gas

connection

( 15.9 flare)

Z arrow view

Knockout for lower part of piping

HWS-P805HR-E, P1105HR-E

Page 20

4-3. Hot water cylinder

HWS-3001CSHM3-E(-UK)

550

5952066.6

Specification

for UK only

2040

HWS-2101CSHM3-E(-UK)

550

5951497.6

Specification

for UK only

1474

HWS-1501CSHM3-E(-UK)

550

5951114

Specification

for UK only

1090

Page 21

5 Wiring diagram

5-1. Hydro unit

Perform the grounding from the

earth terminal in the terminal block of the outdoor unit.

Electric shock may happen. Don't touch the electric parts.

BLK : BLACK BRW : BROWN GRY : GRAY PNK : PINK WHI : WHITE

Power supply 220 - 230V~ 50Hz or 380 - 400V~ 50Hz

WARNING

CAUTION

Color identification

BLU : BLUE GRN : GREEN ORN : ORANGE RED : RED YEL : YELLOW

WHI WHI

YEL

BLU

BRW

5251

BH 3WV

WPM

2WV

*See DIP SW13_1

WHI

RED

GRY

TB 01

12111

Outdoor unit

BRW

TB 03

Hot water cylinder

YEL

BLU

BRW

WHI

RED

WHI

RED

WHI

YEL

TB 05

Type 1

(2-wire spring return)

WHI

YEL

RED

3WV

Type 2

(3-wire SPST type)

Type 3

(3-wire SPDT type)

1L1

3L2

RY05

4T2

2T1

F1, F2

BLU

BRW

Fuse

F1 F2

AC250V T30A

BLU

BRW

Power supply

220 - 230V~ 50Hz

787 6 55 4 3 2

3 2

WPM

YEL/GRN

*Option

(WHI)

CN10

CR10

CR11

CR12

RY 12

CR13

RY 13

CN01

F01 (5A)

Relay

p.c.board

(MCC-1431)

BRW

BLK

BLU

YEL-GRN

313

BLU

BRW BRW BRW

WHI

ORN

PNK

RED

TB 04

MIXV

Type 1

(3-wire SPDT type)

WHI

ORN

PNK

RED

TB 04TB 05

MIXV

Type 2

(3-wire SPST type)

5L3

1L1

3L2

RY02

4T2

6T3

2T1

BRW

BLU

F3F4F6F5F8

BLK

BLU

BRW

L1 L2

Power supply

380 - 400V 3N~ 50Hz

Remote

controller

(HWS-AMS54E)

CN02

(WHI)

YEL-GRN

F9, F10 AC250V T3.15A

BLU BLU

Thermal protector (Single operation)

1L12L3

4T2

2T1

GRY

BLK

F3~8 Fuse AC250V T30A

BLU

GRY

TB 02

(HWS-AMS54E)

TB 07

WHI

GRY

RED

515

BLU

CN501

ORN

(YEL)

GRN

BRW

66 5 4

CN500

(BLU)

3 22

313

CN603

(YEL)

RED

313

CN601 (RED)

WHI

YEL

WHI

RED

CN602 (WHI)

95 5

Thermal protector

(Single operation)95 5

5L3

RY04

6T3

BLU

HWS-P805XWHT9-E HWS-P1105XWHT9-E HWS-P1105XWHT9TR

*Option

Remote

controller

WHI

GRY

CN41 (BLU)

CN604 (BLU)

PNK

Backup heater 1

Backup heater 2

Backup heater 3

ORN

BLK

BLK 2

CN203

(YEL)

RY601RY600RY603 RY602

WHI

RED

RY 06

468

RED

THOTWOTWITC

LPS

BLK

BLK 1 1

CN204 (BRW)

CN205

(RED)

111

CN206

(WHI)

P.C.board

(MCC-1511)

WHI

BLK

CN207

CN212

(BLU)

(WHI)

SW01

SW02

12 43

SW10 SW11 SW12 SW13

ON ON21ON

1234 1234 123 41234

SW06

RY607RY606RY605RY604

CN605

BLK

4T22T1 6T3

BLU

BRW

F3 F6

BLU

BRW

380 - 400V 3N~ 50Hz

(YEL)

1 1

WHI

WHI WHI

RY02

3L51L12L3

BLK

BLU

1L2L

Power supply

CN606

(BLU)

3 3

ORN

Thermal protector (Single operation)

95 5

Thermal protector (Single operation)

95 5

5L3

1L1 3L2

6T3

2T1 4T2

BLU

F3~6 Fuse AC250V T30A

TB 02

RY04

WHI

PNK

648

RY 04

HWS-P805XWHT6-E HWS-P1105XWHT6-E HWS-P805XWHT6TR HWS-P1105XWHT6TR

*Option

TTW

4 4

BRW

RED

2 22

CN214

(WHI)

SW14

OFF

SW07

CN305

CN100

(GRN)

(WHI)

GRY

Backup heater 1

Backup heater 2

TFI

TB 06

RED

CN213

(WHI)

CN208 (BLU)

CN209 (GRN)

CN210 (RED)

CN211 (BLK)

CN200 (RED)

CN201 (WHI)

CN202

(YEL)

CN102 (WHI)

CN101 (WHI)

F100 Fuse T5A 250V~

1 1

WHI

RED

Thermal protector (Single operation)

5L31L1 3L2

6T32T1 4T2

BLU

BRW

BLU

BRW

Power supply

220 - 230V~ 50Hz

GRN

414

GRN

414

YEL

414

YEL

414

YEL

GRN

RED

1 2

BLK

323

BRW

RED

ORN

WHI

BLK

P100

95 5

RY02

F3,F4 Fuse AC250V T30A

TB 02

HWS-P805XWHM3-E HWS-P1105XWHM3-E HWS-P805XWHM3TR HWS-P1105XWHM3TR

1 2

414

PJ20

1 2

414

PJ20

Photocoupler input

p.c.board

414

PJ17

Photocoupler input

p.c.board

414

PJ17

Backup heater 1

Relay p.c.board (MCC-1217)

(MCC-1214)

3 2

TB1

3 2

TB1

3 2 1

TB1

3 2 1

TB1

2 2 11

Thermal protector (auto)

Flow switch

75 5

ransformer

1. The one-dot chain line indicates wiring at the local site, and the dashed line indicates accessories sold separat ely and service wires, respectively. , and indicates the terminal

2. board and the numbers indicate the terminal numbers.

indicates P.C. board.

* Be sure to fix the electric

parts cover surely with screws. (Otherwise water enters into the box resulting in malfunction.)

*Option p.c.board

Boiler control O/P

Alarm O/P

Compressor operation O/P

Defrost O/P

Hot water tank thermostat I/P Emergency stop I/P

Cooling thermostat I/P Heating thermostat I/P

Symbol

WPM Water pump motor 3WV 3-way valve (local) 2WV 2-way valve (local) MIXV Mixing valve (local) BH RY01~RY06 LPS Low pressure sensor

Parts name

Booster heater Relay01~Relay06

Heater AC230V, 3kWBackup heater1, 2, 3

Water heat exchanger temperature sensor

Water heat exchanger inlet temperature sensor

TWI

Water heat exchanger outlet temperature sensor

TWO

Backup heater outlet temperature sensor

THO

Hot water cylinder temperature sensor

TTW

Floor heating inlet temperature sensor

TFI TB

Terminal block

Parts nameSymbol

HWS-P805XWHT6-E : Installed

HWS-P1105XWHT6-E : Installed HWS-P805XWHT9-E : Installed HWS-P1105XWHT9-E : Installed HWS-P805XWHM3-E : Not installed HWS-P1105XWHM3-E : Not installed

HWS-P805XWHT6TR : Installed

HWS-P1105XWHT6TR : Installed HWS-P1105XWHT9TR : Installed HWS-P805XWHM3TR : Not installed HWS-P1105XWHM3TR : Not installed

Page 22

5-2. Outdoor unit

HWS-P805HR-E, HWS-P1105HR-E

HWS-P805HR-E, HWS-P1105HR-E,

63H

49C

t°

Symbol CM FM01 FM02 PMV TD TS TE TL TO 20SF SV PD 49C RY L/F 63H

FM01

FM02

121

Red

CN400

(White)

CN300

(White)

CN609

121

(Blue)

1 2

CN610

(Yellow)

4 5 6

CN604

121

(White)

CN603

(White)

CN602

121

(Yellow)

CN601

121

(White)

CN600

(White)

CN710

(White)

346

PMV

Compressor Fan motor

Pulse motor valve Pipe temperature sensor(Discharge) Pipe temperature sensor(Suction) Heat exchanger sensor 1 Heat exchanger sensor 2 Outside temperature sensor 4-way valve coil 2-way valve coil Pressure sensor Compressor case thermostat Relay Line Filter High-pressure switch

-P805HRTR

-P1105HRTR

Reactor Reactor

(Gray) (Gray)

P04 P05

(White) (White)

P07P06

P.C. board MCC-1571

4 3

SW801

4 3

SW800

RY704

1 1

20SF

CN701

(White)

Earth

screw

Outdoor unit

Hydro unit

(White)

Earth

screw

CN04

1 1

(Gray)

3 3

(White)

1. indicates the terminal block. Alphanumeric characters in the cycle indicate the terminal No.

2.The two-dot chain line indicates the wiring procured locally.

3. indicates the P.C. board.

4.For the hydro unit circuit, refer to the wiring diagram of the hydro unit.

SW804

SW803

SW802

CN704

(Blue)

Part name

(Red) (White) (Black)

CN200

Fuse, F01 T25 A, 250 V ~

Fuse, F03 T10 A, 250 V ~

(Red)

P01 P02

(Black)

(Red) (White)

Earth

screw

Power Supply

220 - 230 V ~ 50 Hz

CN202

CN201

CN703

(Gray)

CN702 (White)

CN606

(Red)

L/F

P09

Fuse

T3.15 A 250 V ~

Fuse

T3.15 A 250 V ~

(White)

(Black)

4 4

(Red)

(Black)

2 2

Heater

Page 23

5-3. Hot water cylinder unit

TB03 (230 V)

TB06 (TTW)

Supply 220 - 230 V from hydro unit Cable size 1.5 mm

(minimum)

To hydro unit

Green / Yellow

Blue

Double pole thermal cut out

Blue

Brown

TTW sensor

Hot water cylinder heater

Page 24

6 Key electric component rating

6-1. Hydro unit

HWS-P805XWHM3-E, T6-E, T9-E

No. Component name

Circulation pump

Backup heater 3 kW

Backup heater 6 kW

Backup heater 9 kW

Water heat exchange

temperature sensor (TC sensor)

Water inlet temperature sensor

(TWI sensor)

Water outlet temperature sensor

(TWO sensor)

Heater outlet water temperature

sensor (THO sensor)

Floor inlet temperature sensor

(TFI sensor)

Low pressure sensor

Bimetal thermostat (auto)

Bimetal thermostat (single

operation)

Flow switch

Output board (OP)

Input board (OP)

Remote controller (Main)

Remote controller (Sub)

Water 3-way valve terminal

Water 2-way valve terminal

Mixing valve terminal

Circulation pump terminal

Booster heater terminal

Fuse

Model name

Type name Rating

M3-E T6-E T9-E

OOOUPM 2K 25-60 130

O SA3-23652B

OOO –

OP OP OP

OOO

OP OP OP

OOO –

TCB-PCIN3E AC230 V 0.5 A, DC24 V 1 A

TCB-PCM03E Contact input

HWS-AMS54E

AC230 V 0.40 A (MAX)

AC230 V 3 kW

AC400 V (3N) 6 kW

AC400 V (3N) 9 kW

10 kΩ (25 °C)

Operating pressure 0.20 MPa

Operating temperature 75±3 °C DC12 V / 0.2 A

Operating temperature 95±5 °C AC250 V / 16 A

Operating flowing quantity 13 /min

AC230 V 0.1 A 2Wire, 3Wire SPST, SPDT type mountable

AC230 V 0.1 A 2Wire type mountable

AC230 V 0.1 A 3Wire SPST, SPDT type mountable

AC230 V 1.0 A

AC250 V 30 A

O ······· Applied OP ····· Optional accessory

Page 25

HWS-P1105XWHM3-E, T6-E, T9-E

No. Component name

Circulation pump

Backup heater 3 kW

Backup heater 6 kW

Backup heater 9 kW

Water heat exchange

temperature sensor (TC sensor)

Water inlet temperature sensor

(TWI sensor)

Water outlet temperature sensor

(TWO sensor)

Heater outlet water temperature

sensor (THO sensor)

Floor inlet temperature sensor

(TFI sensor)

Low pressure sensor

Thermal protector (auto)

Thermal protector (single

operation)

Flow switch

Output board (OP)

Input board (OP)

Remote controller (Main)

Remote controller (Sub)

Water 3-way valve terminal

Water 2-way valve terminal

Mixing valve terminal

Circulation pump terminal

Booster heater terminal

Fuse

Model name

M3-E T6-E T9-E

OOO

OOO –

OP OP OP

OOO

OP OP OP

OOO –

Type name Rating

UPM GEO 25-85 130

AC230 V 0.66 A (MAX)

SA3-23652B AC230 V 3 kW

SA3-23652B AC400 V (3N) 6 kW

SA3-23652B AC400 V (3N) 9 kW

10 kΩ (25 °C)

Operating pressure 0.20 MPa

Operating temperature 75±3 °C DC42 V / 0.2 A

Operating temperature 95±5 °C AC250 V 16 A

Operating flowing quantity 18 L/min

TCB-PCIN3E AC230 V 0.5 A, DC24 V 1 A

TCB-PCM03E Contact input

HWS-AMS54E

AC230 V 0.1 A 2Wire, 3Wire SPST, SPDT type mountable

AC230 V 0.1 A 2Wire type mountable

AC230 V 0.1 A 3Wire SPST, SPDT type mountable

AC230 V 1.0 A

AC250 V 30 A

O ······· Applied OP ····· Optional accessory

Page 26

6-2. Outdoor unit

HWS-P805HR-E, P1105HR-E

No. Component name Type name Rating

Compressor DA422A3F-26M

Outdoor fan motor (x2) ICF-280-A100-1 Output 100 W

Reactor (x2) CH-44 1.4 mH, 25 A

4-way valve coil STF-H01AP1874A1 AC220 - 230 V full-wave rectifier input, alive time 10 sec or less

Pulse motor valve (PMV) coil UKV-A038 DC12 V

Compressor case thermostat US-622KXTMQO-SS OFF = 125 ± 4 °C, ON = 90 ± 5 °C

PC board MCC-1571 Input 1Ø, AC220 - 230 V ± 10%, 50/60 Hz

High pressure sensor NSK-BH042D-430 0 ~ 4.15 MPa

2-way valve coil VPV-MOAJ510B0 AC220 - 240 V

High pressure switch ACB-4UB154W OFF = 4.15 + 0, -0.15 MPa

6-3. Hot water cylinder unit

Model name

1501

2101

No. Component name

Hot water cylinder heater

Hot water cylinder temperature

sensor (TTW sensor)

Thermal cut-out

CSH M3-E (-UK)

OOO

CSH M3-E (-UK)

3001

CSH M3-E (-UK)

Type name Rating

– AC230 V 2.7 kW

10 kΩ (25 °C)

–

Operating temperature Manual reset 82 °C (+3K/-2K)

O ······· Applied

Page 27

6-4. Water heat exchange control board

PWM signal line connector CN500

Transformer input connector CN101

AC power supply connector CN100

Serial input connector CN305

Backup heater 2 drive connector CN606

3WV drive connector CN602

Transformer connector CN102

Flow switch connector CN200

Overheat protection thermostat input connector CN202

TWO sensor connector CN205

TWI sensor connector CN204

THO sensor connector CN206

TTW sensor connector CN214

Low pressure sensor connector CN207, CN212

Remote controller

connector

CN41

TC sensor connector

CN203

TFI sensor connector CN213

Backup heater 1 drive connector CN605

Mixing valve drive connector CN604

Hot water cylinder

drive connector

CN601

Built-in circulation

pump connector

CN603

Relay board

connector

CN501

Option board

connector

CN208-CN211

HWS-P805XWHM3-E, P805XWHT6-E, P805XWHT9-E HWS-P1105XWHM3-E, P1105XWHT6-E, P1105XWHT9-E

Page 28

6-5. Outdoor control board

Fan motor output (Upper) CN400(White)

Fan motor output (Lower) CN300(White)

Case thermostat connector CN609(Blue)

High-pressure switch connector CN690 (Red)

Power circuit protection fuse F100(250 V, 3.15 A, plastic case)

4-way valve connector CN701(White)

Compressor ON output connector CN704(Blue)

Heater output connector CN703(Grey)

External input connector CN610(Yellow)

Special operation switches SW801 SW804

Display change-over switches SW800 SW803

PMV connector CN710(White)

PD sensor CN606(Red)

2-way valve CN702(White)

Initialization switch SW802

4-way valve protection fuse F700(250 V, 3.15 A plastic case)

Power supply protection fuses F01 (250 V, 25 A)

Earth lead wire P09(Black)

Connecting cable connector CN04(White)

Connecting cable protection fuse F03(250 V, 10 A)

Electrolytic capacitorsCompressor output terminals CN202 CN201 CN200

Power supply connection lead wires P01(Red) P02(White)

Temperature sensor

connectors

TL CN604(White)

TD CN603(White)

TO CN602(Yellow)

TE CN601(White) TS CN600(White)

Alive, abnormal display LEDs D800 804(Yellow) D805(Green)

Hydro-outdoor communication

signal LEDs

D503 (Green, Outdoor =>Hydro)

D502 (Amber, Hydro => Outdoor)

HWS-P805HR-E, P1105HR-E

Page 29

7 Refrigeration cycle / Water system diagram

7-1. Water system diagram

Fan coil unit

zone1

Boiler

(local)

Booster heater

(local)

By-pass valve

Safety valve

set : 3.5bar

(locally procured)

Motorized 3-way valve

AC230 V

(locally procured)

Radiator unit

2-way valve for

cooling mode

(locally procured)

AC230 V

Strainer

40 mesh

(locally procured)

By-pass valve

(locally procured)

Drain cock for water charge

Motorized mixing valve

zone2

90 °C

10 bar

Relief valve(UK)

AC230 V

(locally procured)

Circulation pump

(locally procured)

1 : 2.7 kW Ø

Cylinder heater

TFI

Floor

heating

Buffer tank (locally procured)

Air vent valve

set : 95 ± 5 °C

Single operation

Thermal protector

Overpressure preventive

set : 1bar

Expansion vessel

THO

valve

set : 4.3bar

max : 10 bar

Circulation pump

(auto)

set : 75 ± 3 °C

Thermal protector

Manometer

gage : 6bar

TWO

Water vent

valve

TWI

Flow sw

1 : 3 kWØ3 : 6 kWØ3 : 9 kW Ø

Backup heater

Water heat exchanger

Low pressure sensor

max : 10bar

Water outlet

Pressure relief

Set value : 7 bar (UK)

TTW

(manual reset)

Thermal cut-out

82 °C (+3K/-2K)

Outdoor unit

Water inlet

3.5 bar

Reducing

valve (UK)

Hot water cylinder

Local hot water system

Page 30

Installation example of water circuit

(1) (2)

(3) (4)

(5) (6)

The water flowing for a system without buffer tank ((1), (2), (3), (5)) requires18 /min (P805XWH 13 /min) or more. This water flowing requires 5 or more branches of Floor heating or Radiator etc.

Less than 5 branches may cause a flow deficiency. In this case, please provide a buffer tank and secondary pumps as shown in (4). Please check how to install the boiler (See page 40)

Page 31

7-2. Refrigeration cycle system diagram

HWS-P805XWHM3-E, HWS-P805XWHT6-E, HWS-P805XWHT9-E, HWS-P1105XWHM3-E, HWS-P1105XWHT6-E, HWS-P1105XWHT9-E / HWS-P805HR-E, HWS-P1105HR-E

Heating / Hot water s upply Defrosting / Cooling

High pressure

sensor (PD)

Compressor

High-pressure switch

Accumulator

Outdoor unit

2-way valve

4-way valve

Outdoor heat exc hanger

Hydro unit

Expansion vessel

Low pressure sensor

Plate-type water heat exchanger

PMV

TW O

Safety valve

THO

Circulation pump

TW I

Manometer

Water vent valve

Air vent valve

Back up heater

Flow switch

Page 32

8 Operational description

This chapter describes the working circuit and control of Air to Water Heat Pump about the following operations.

8-1

8-2

8-3

8-4

Item

8-1. Basic Operation

1) Operation control

2) Hot water supply operation

3) Heating operation

4) Cooling operation

8-2. Operation Mode and Control Method

1) Heat pump operation range of hot water supply, heating and cooling

2) Hot water supply operation

3) Heating operation

4) Cooling operation

5) Simultaneous operations of "hot water supply" and "heating"

6) Simultaneous operations of "hot water supply" and "cooling"

7) Boiler control

8) Hot water boost operation

9) Anti bacteria operation

10) Night setback operation

11) Frost protection operation

12) Auto operation

13) Night time low-noise operation

8-3. Hydro Unit Control

1) Capacity control (compressor, high-temperature release, low-temperature release)

2) Heater control

3) Circulation pump control

4) Control by the flow switch

5) Mixing Valve control (2-temperature heating control)

6) Room temperature control

7) Room temperature control with the thermostat

8) Hot water cylinder thermostat control

9) Control of force stop and restart

10) Control of limit of heat pump operation

11)Output signal control 1

12)Output signal control 2

13) Q-H characteristics of hydro unit

14) Automatic restart control

15) Piping freeze prevention control

16) High return water protect control

8-4. Outdoor unit control

1) PMV (Pulse motor valve) control

2) Discharge temperature release control

3) Current release control

4) Current releases shift control

5) Outdoor fan control

6) Defrosting control

7) Winding heating control

8) Short circuit operation prevention control

9) Over current protection control

10) High pressure release control

11) Compressor case thermostat

12) Bottom plate heater control

13) 2-way valve control

14) Start up from hibernation

Page

32 to 34

35 to 46

46 to 61

62 to 70

Page 33

Item Operation flow and applicable data, etc. Operation description

Operation condition selection

Serial signals

transmit and receive

Heating: Run/Stop

Hot water supply: Run/Stop

Cooling: Run/Stop

Serial signals transmit

and receive

Serial signals

transmit and receive

Remote controller settings <Heating> Temperature setting <Hot water supply > Temperature setting <Cooling> Temperature setting

Auto Temp Anti bacteria Frost protection Hot water boost

Water heat exchange Sub board

Outdoor

unit control

Serial signals

transmit and receive

Outdoor unit control Inverter frequency control Waveform synthesis function

Calculation function (Temperature calculation)

AD conversion function Rapid heating function Compressor restart Delay function

G-Tr overcurrent prevention function

Defrosting operation function

Hydro unit

Outdoor unit

Compressor Outdoor fan motor

PD sensor TD sensor TS sensor TE sensor TO sensor PMV 4-way valve 2-way valve Bottom plate heater High pressure switch

Thermostat (Cooling/Heating)

Forcible stop input

Error Alarm stop output Defrosting output Operation output Boiler "ON/OFF" Booster Heater

Water heat exchange control board

Inverter

Condensed temperature sensor (TC) Water inlet temperature sensor (TWI) Water outlet temperature sensor (TWO) Water heater outlet temperature sensor (THO) Hot water cylinder

sensor

(TTW) Floor inlet sensor (TFI) Overheat prevention thermostat Flow switch Hot water cylinder heater Backup heater 1 power-relay Backup heater 2 power-relay

Pump 1 (Built-in circulation pump)

2WV_W 3WV_W

Mixing Valve

Low pressure sensor

AC 220~230 V for Hot water cylinder heater

AC 220 - 230 V for heat pump

AC 380~400 V (3N~) for Back up heater

Serial communication

Hot water supply heater MG

8-1. Basic Operation

1) Operation control Remote controller

1. Purpose The operations of the hydro unit and the outdoor unit are controlled according to user-defined operation condition settings.

2. Details The operation controls include those shown on the left.

3. Operations

1) An operation condition is selected with the remote controller.

2) Setting the remote controller button to “ON” transmits a signal to the hydro unit.

3) The hydro unit controller controls the operations shown on the left while also controlling the water 2way valve, water 3-way valve, circulation pump, mixing valve, hot water cylinder heater, and backup heater.

4) The hydro unit controller transmits an operation instruction to the outdoor unit, and uses serial signals to transmit and receive control statuses.

5) The outdoor unit control unit performs the operation controls shown on the left while also controlling the compressor, outdoor fan motor, pulse motor valve, 4-way valve, 2way valve, and bottom plate heater.

Page 34

Item Operation flow and applicable data, etc. Operation description

Hydro unit

control

Circulation pump "ON/OFF" control Water 3-way valve control Hot water cylinder heater control

Hot water temperature: 40 °C to 75 °C

Number of compressor revolutions control Number of outdoor fan motor revolutions control Pulse motor valve control 4-way valve control

Outdoor unit

control

Operation instruction

signal transmit

Hot water supply

operation start

Hydro unit

control

Circulation pump "ON/OFF" control Water 3-way valve control Water 2-way valve control Mixing Valve control Backup heater control Booster heater control

Heating temperature: 20 °C to 60 °C

Number of compressor revolutions control Number of outdoor fan motor revolutions control Pulse motor valve control 4-way valve control

Outdoor unit

control

Operation instruction

signal transmit

Heating operation

start

8-1. Basic Operation

2) Hot water supply operation Hot water supply operation

3) Heating operation Heating operation

1. Purpose Hot water supply

2. Details This section performs hot water supply operation according to heating conditions specified for the steps on the left.

3. Operations

1) By pressing the [ ] button on the remote controller, the hydro unit controller starts to transmit a hot water supply operation signal to the outdoor unit.

2) The hydro unit performs the operation controls shown on the left while also controlling the circulation pump, hot water cylinder heater “3WV”.

3) The outdoor unit controls the compressor, outdoor fan motor, electric expansion valve, and 4-way valve based on the operation signals transmitted by the hydro unit.

1. Purpose Heating

2. Details This section performs heating operation according to heating conditions specified for the steps on the left.

3. Operations

1) By pressing the [ ] button on the remote controller, the hydro unit controller starts to transmit a heating operation signal to the outdoor unit.

2) The hydro unit performs the operation controls shown on the left while also controlling the circulation pump, backup booster heater “ON/OFF”, water 2way valve, and water 3way valve.

3) The outdoor unit controls the compressor, outdoor fan motor, electric expansion valve, and 4-way valve based on the operation signals transmitted by the hydro unit.

Page 35

Item Operation flow and applicable data, etc. Operation description

8-1. Basic Operation

4) Cooling operation 1. Purpose

Cooling operation

start

Hydro unit

control

Cooling temperature: 7 °C to 25 °C

Circulation pump "ON/OFF" control Water 3-way valve control Water 2-way valve control

Operation instruction

signal transmit

Number of compressor revolutions control

Outdoor unit

control

Number of outdoor fan motor revolutions control Pulse motor valve control 4-way valve control

Cooling

2. Details This section performs cooling operation according to cooling conditions specified for the steps on the left.

3. Operations

1) By pressing the [ ] button on the remote controller, the hydro unit controller starts to transmit a cooling operation signal to the outdoor unit.

2) The hydro unit controller performs the operation controls shown on the left while also controlling the circulation pump, water 2-way valve, and water 3-way valve.

3) The outdoor unit controls the compressor, outdoor fan motor, pulse motor valve, and 4-way valve based on the operation signals transmitted by the hydro unit.

Page 36

Item Operation flow and applicable data, etc.

-30

-28

-26

-24

-22

-20

-18

-16

-14

-12

-10

-8

-6

-4

-2

4 6 8 1012141618202224262830323436384042444648505254565860

Water temperature at inlet (TWI)

Cooling operation range

Heat pump operation range of hot water supply and heating.

*With the exception of TO 25 °C

or higher for heating.

Heater operation

Heat pump operation range of hot water supply and heating Freeze determination is executed only once.

8-2. Operation Mode and Control Method

1) Heat pump operation range of hot water supply, heating and cooling The heat pump operation range of hot water supply, heating and cooling is shown on the figures below.

• HWS-P805XWH**-E

• HWS-P1105XWH**-E

Page 37

Item Operation flow and applicable data, etc.

Operation

mode

Controlled object

Cooling

only

Heating

only

Hot

water

supply

only

Heating and Hot water both operate Cooling and Hot water both operate

Heat pump select

for heating

Heat pump select

for hot water

supply

Heat pump select

for cooling

Heat pump select

for hot water

supply

Heating

side

Hot

water

supply

side

Heating

side

Hot

water

supply

side

Cooling

side

Hot

water

supply

side

Cooling

side

Hot

water

supply

side

Heat pump O O O O × × O O × × O

Backup heater

ЧOЧOЧЧЧЧЧЧЧ

Hot water cylinder heater

××O×O×O×O×O

TTW

HP_H OFF 45 °C

HP_H ON 38 °C

TSC_H

(Temperature set with

remote controller)

Thermostat OFF

c Zone

a Zone

Heater operation

b Zone

Heat pump operation

TSC_H is hot water temperature set with remote controller

FC No. Setting item Default Setting available range

1E Upper limit of hot water supply temperature 75 °C 60-80 °C

1F Lower limit of hot water supply temperature 40 °C 40-60 °C

20 Heat pump start temperature 38 °C 20-45 °C

21 Heat pump end temperature 45 °C 40-50 °C

24 Outside air correction start temperature for hot water supply*

0 °C -20-10 °C

25 Outside air correction temperature for hot water supply*

3 degree 0 -15 degree

8-2. Operation Mode and Control Method

The following shows the operation modes and controlled objects.

2) Hot water supply operation

1) Operation start condition When the [

] remote controller button is pressed and the

following operation start condition is met, the operation starts.

• TTW < 38 °C is detected.

2) Operation mode determination An operation mode is determined according to the temperature of TTW sensor.

• Heat pump operation selection *1 *2

• When TTW < 38 °C (a zone in the right figure) is met, the

heat pump operation is selected.

• Heater operation selection

When 45 °C ≤ TTW < TSC_H (b zone in the right figure) is met, the heater operation is selected.

• Thermostat status "OFF" selection

When TTW ≥ TSC_H is met, the thermostat status "OFF" is selected.

O Possible

× Not possible

TTW senso

(Hot water cylinder unit)

3) Operation stop The operation stops in the following cases.

• The remote controller gives a stop instruction.

•TTW ≥ TSC_H is met.

*1: When the outside temperature is -25 °C or below, the heater

operation is selected even if the TTW temperature falls into "a zone".

*2: When "Hot water supply" and "Heating" are simultaneously in

operation, the heater operation may be selected depending on the outside air temperature.

Related FC

*3:When the outside temperature is 0 °C or below, the boil-up temperature will be higher that setting temperature in hot

water supply mode.

Page 38

Item Operation flow and applicable data, etc.

TWI

TSC_F

Thermostat off operation

e zone

d zone

diff2K

Heat pump operation

TSC_F is a heating temperature

set with remote controller

FC No. Setting item Default Setting available range

1A Upper limit of heating (Zone1) limited temperature 60 37-60 °C

1B Lower limit of heating (Zone1) limited temperature 20 20-37 °C

1C Upper limit of heating (Zone2) limited temperature 60 37-60 °C

1D Lower limit of heating (Zone2) limited temperature 20 20-37 °C

8-2. Operation Mode and Control Method

3) Heating operation <Operation only for ZONE1>

• This operation is enabled when DP_SW12_2 ZONE1 is set to "OFF" (default).

• The remote controller displays settings, and only the set temperature of can be changed.

• This operation is enabled when DP_SW12_2 ZONE1 is set to "OFF" (default) and DP_SW12_3 ZONE2 to "ON".

• The remote controller displays settings, and the set temperatures of

• To set temperatures for and , use SELECT to switch between and

• For 2 zone temperatures control, the flow adjustment of MIXING VALVE controls the water temperature of

see the description on MIXING VALVE control in 8-3-5. (See page 52)

1) Operation start condition Pressing the [ operation. *1 *2

2) Operation mode selection An operation mode is determined according to the temperature of TWI sensor.

• Heat pump operation selection *1 *2 When TWI < TSC_F (d zone in the right figure) is met, the heat pump operation is selected.

• Thermostat status "OFF" When TWI ≥ TSC_F (e zone in the right figure) is met, the thermostat status "OFF" is selected.

can be changed.

. For details,

] button of remote controller starts a heating

3)Operation stop condition When the following condition is met, the heating operation stops.

• The remote controller gives a stop instruction.

*1: When the outside temperature is -25 °C or below, the heater

operation is selected even if the TWI temperature falls into "d zone".

*2: When "Hot water supply" and "Heating" are simultaneously in

operation, the heater operation may be selected depending on the outside air temperature.

Related FC

Page 39

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting available range

02 Cooling mode availability 0 0: Permitted

18 Upper limit of cooling setting temperature 25 18-30 °C

19 Lower limit of cooling setting temperature 7 7-20 °C

Zone Hot water supply side Heating side

f Heat pump *2 Stop *2

g Heater Heat pump

h Heater *3 Heater *3

Zone Hot water supply side Heating side

f' Heater Heat pump

8-2. Operation Mode and Control Method

4) Cooling operation Pressing the [

] button and then [OPERATION MODE] starts a cooling operation.

1) Operation start condition Pressing the [

] button and then [OPERATION MODE]

starts a cooling operation.

eration mode selection

2) Op

An operation mode is determined according to the temperature of TWI sensor.

• Heat pump operation selection *1 When TWI ≥ TSC_F (d zone in the right figure) is met, the heat pump operation is selected.

• Thermostat status "OFF" When TWI < TSC_F (e zone in the right figure) is met, the thermostat status "OFF" is selected.

3)Operation stop condition When either of the following conditions is met, the cooling operation stops.

• The remote controller gives a stop instruction.

• The operation is switched to heating.

*1: When the outside temperature is 10 °C or below, cooling does

not start even if the TWI temperature falls into "d zone".

Related FC

TSC_F+2K or 12 °C

(Temperature set with

remote controller)

TSC_F

TWI

Heat pump operation

d zone

TSC is a cooling temperature

set with the remote controller

(cooling)

e zone

Thermostat off operation

Diff : 2K

5) Simultaneous operations of "hot water supply" and "heating" At the time of "Hot water supply" and "Heating" simultaneous operation, the operation mode is select as follows depending on the outside air temperature.

• f zone Operation with hot water supply priority A heat pump operation is performed in the hot water supply side, and a heating operation in the heating side. The heat pump maintains a supply of hot water for up to 30 minutes during a simultaneous operation.

• g zone Operation with heating priority A heat pump operation is performed in the heating side, and

(FC22)

-25

Hot water

supply heat

pump priority

operation

Heating heat pump priority

operation

Heater operation

f zone

Diff : 5deg

g zone

Diff : 5deg

h zone *3

a cylinder heater operation in the hot water supply side.

Operation mode by zone

*2: Note that after a heat pump operation for "Hot water supply" is selected in f zone, when the operation moves to a

heater operation for "hot water" and then 5 minutes has passed (Hot water supply operation in b zone), the operation mode changes as follows.

When TTW ≥ 45 °C (FC: 21) is met, the operation ends f' zone and returns to f zone.

*3: If the h-zone operation starts while external temperature is higher than -25 °C, the h-zone operation continues for

60 minutes.

Page 40

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting available range

22 Priority mode switch temperature 0 °C -20-20 °C

Hot water supply side Cooling side

Normal Heater * Heat pump *

Hot water supply side Cooling side

TTW<38 °C Heat pump stop

FC No. Setting item Default Setting available range

0F Heat pump operation for hot water supply permitted / not

permitted

0: Not permit 1:Permitted (Heat pump

may run for hot water

supply.)

8-2. Operation Mode and Control Method

Related FC

* Note: When user selects “hot water supply” and “ZONE1,2”, and Heat pump selects hot water supply mode, the

Maximum operating time of heat pump is 30 min.

6) Simultaneous operations of "hot water supply" and "cooling" For simultaneous operations of "hot water supply" and "cooling", basically cooling runs by a heat pump operation, and

hot water supply by a heater operation.

* By setting FC_0F to “1”, heat pump operation for “hot water supply” is permitted. Under the setting, the heat pump

runs for the hot water supply side when TTW is less than 38 °C.

The operation mode returns to normal when TTW become 45 °C or more (FC: variable).

Related FC

Page 41

Item Operation flow and applicable data, etc.

Boiler

Outdoor unit

Hydro

Buffer

Radiator

Option

TO<=-10* -10*<TO

HEATING Boiler + HP** HP

HOT WATER HP HP

HEATING & HOT WATER

Boiler for heating HP for hot water or heating

COOLING – HP (TO≥10)

COOLING & HOT WATER

HP for cooling Heater for hot water***

HP for cooling

Heater for hot water*** * Boiler & HP switching temp setting FC23= -10 ** Boiler control / functionality setting FC5B= 0 (HP+Boiler) *** Hot water & cooling priority setting (FC_0F=“1” hot water

priority is necessary.)

Outdoor

Unit

Hydro unit Buffer tank

Radiator

TO<=-10* -10*<TO

HEATING Boiler + HP** HP

HOT WATER Boiler + HP** HP

HEATING & HOT WATER

Boiler + HP** HP

COOLING – HP (TO≥10)

COOLING & HOT WATER

HP for cooling Heater for hot water***

HP for cooling

Heater for hot water***

* Boiler & HP switching temp setting FC23= -10 ** Boiler control / functionality setting FC5B= 0 (HP+Boiler) *** Hot water & cooling priority setting (FC_0F=“1” hot water

priority is necessary)

8-2. Operation Mode and Control Method

7) Boiler control The boiler assists the hot water supply operation and heating operation according to the boiler’s position.

7-1) Boiler setting

• TCB-PCIN3E optional PC board is required. Connect its connection cable to CN208 port on the PC board of the hydro unit.

• Setting DPSW on the hydro unit: DP_SW13_2=”ON/OFF” switches “Using boiler / Not using boiler (Default)”. Set the switch to “ON” when using the boiler.

• The temperature switching the boiler and heat pump: FC_23=-10 °C (Default) See the next item. The boiler output becomes effective when the outside air temperature is -10 °C or less.

• Boiler position setting: DP_SW02_1=”ON/OFF” must be switched in accordance with the boiler position from the 3-way valve; before the 3-way valve / after the 3-way valve and in the heating side (Default). When the switch is set to “ON”, the boiler runs in the hot water supply operations or heating operation. The action of the 3-way valve depends on heat pump’s action and the boiler follows their action. When the switch is set to “OFF”, the boiler runs in heating operation. Also, the boiler runs when the heat pump is running for hot water supply while heating and supplying hot water simultaneously.

• Priority setting between the boiler and hydro unit: FC_3E=”0/1” switches the running priority; hydro unit (Default) / boiler. When FC_3E is set to “0” (Default), the hydro unit has priority, the boiler stops as temperature reaches the hydro unit’s temperature setting. When FC_3E is set to “1”, the boiler continues to run even after temperature reaches the hydro unit’s temperature setting. (The setting of FC_3E is effective during the HP+Boiler operation.)

• Coordination setting of the boiler and heat pump: when FC_5B=”0”, the boiler and heat pump runs simultaneously. When FC_5B=”1”, only the boiler runs, pump ON. (However, if the external air temperature becomes the boiler-HP switching temperature or more within 60 minutes) When FC_5B=”2”, the heater runs. (the heater may run instead for up to 60 minutes.) When FC_5B=”3”, only the boiler runs. (Pump OFF:Default) DP_SW10_3 should be “OFF (Default)”

DP_SW02_1=“OFF”(The boiler is placed after the 3-way valve and in the heating side.)

DP_SW02_1=“ON”(The boiler is placed before the 3-way valve.)

Page 42

Item Operation flow and applicable data, etc.

-10

I zone

J zone

Heat pump

operation

Heat pump &

boiler operation

Diff : 5K

Boiler position

(DPSW02_1)

FC62

(Activate/deactivate A02 error

detection)

Temperature range in which the boiler signal is output

(Detected temperature of TWI, TWO or THO)

OFF

(After 3-way valve, heating side)

0 TWI or TWO or THO<58 °C

1 TWI or TWO or THO<58 °C

(Before 3-way valve)

0 TWI or TWO or THO<70 °C

1No limit *1

Boiler is installed or not

(DPSW13_2)

FC62

(Activate/deactivate A02

error detection)

Temperature recognized as A02 error

(Detected temperature of TWI, TWO or

THO)

OFF

(Not installed)

0 TWI or TWO or THO≥70 °C (Beep)

1 TWI or TWO or THO≥70 °C (Beep)

(Installed)

0 TWI or TWO or THO≥70 °C (Beep)

1 No error detection *1 (No beep)

Boiler is installed

(DPSW13_2)

ZONE2 operation is

using

(DPSW12_3)

P2 synchronize

with P1

(DPSW10_3)

FC5B

Coordination of the

boiler and heat pump

2 zone temperature control

P1 / P2 / Mixing Valve control

(Installed)

(Using)

OFF

(No synchronize,

Always ON)

(Boiler and heat pump)

ON / ON / ON

(Boiler only)

(Heater only)

(Boiler only(P1 OFF))

OFF / ON / ON

(Synchronize)

(Boiler and heat pump)

ON / ON / ON

(Boiler only)

(Heater only)

(Boiler only(P1 OFF))

OFF / OFF / OFF

8-2. Operation Mode and Control Method

7-2) Boiler-output control

• I zone: heat pump operation Normally the heat pump operation is executed in the zone.

• J zone: heat pump operation and boiler operation *1 In the zone, the heat pump + boiler operation (*2) is executed and the heater operation is executed in the hot-watersupply side.

*2:Operation mode is not changed with the outside temperature when an external signal to control the limit of heat

pump limit operation (see 8-3-10) is input.

7-3) Boiler output limit control The boiler power output is limited depending on the settings of boiler position (DPSW02_1) and FC62.

7-4) A02 error detection while the boiler is running A02 error detection is deactivated depending on the settings of FC62 and whether the boiler is installed or not

(DPSW13_2).

*1 If a user runs the boiler under the condition that no limit has been set, and hot water from the boiler has damaged parts

inside of the hydro unit, the user is fully responsible for the damage.

7-5)2 zone temperature control while the boiler is running 2 zone temperature control by boiler with P1 OFF is required DPSW10_3 OFF

Page 43

Item Operation flow and applicable data, etc.

FC No. Setting item Default Variable range

23 Boiler-heat pump switching temperature -10 °C -20-20 °C

3E Control priority between the hydro unit and boiler

(Control valid for operating heat pump mode)

0: Hydro unit control Independent temperature

control for the hydro unit and boiler

5B Coordination of the boiler and heat pump 3: Boiler only (Pump OFF) 0: Boiler and Heat pump

1: Boiler only 2: Heater only

62 Activate/deactivate A02 error detection 0: Activate 1: Deactivate

FC No. Setting item Default Setting available range

09 Hot water boost set temperature 75 °C 40-80 °C

08 Hot water boost operation time 60 min 30-180 min

Every 10 min

8-2. Operation Mode and Control Method

Related FC

8) Hot water boost operation A Hot water boost operation heats the water quickly to the set temperature TSC_H = 75 °C (FC_09).

1) How to operate

• When pressing the [Hot water boost] button after pressing the remote controller [ in progress in the heating side switches to in the hot water side, and continues the operation regardless of the hot water supply start condition, TTW < 38 °C. In addition, the hot water cylinder is immediately energized to start a Hot water supply operation under TSC_H = 75 °C.

• A Hot water boost operation returns to the usual operation after 60 minutes passed or reached 75 °C.

• The remote controller display during a Hot water boost operation is the same as the set temperature display of a usual Hot water supply operation.

• The usual set temperature change is used for changing the set temperature during a Hot water boost operation. Change the BOOST set temperature with FC_09, if necessary.

] button, a heat pump operation

HOT WATER button set to "ON"

Hot water boost button set to "ON"

Current heat pump

Heating side

operation

Hot water supply side

Switches to Hot water

supply operation

75 °C hot water operation (FC_09)

60 minutes operating time (FC_08)

Usual operation

Related FC

Page 44

Item Operation flow and applicable data, etc.

Anti bacteria button set to "ON"

Anti bacteria start time

75 °C hot water supply operation

75 °C hot water supply operation for 30 minutes

Usual hot water supply operation

(Set temperature: 40 °C to 75 °C)

HOT WATER button set to "ON"

Caution

• During a 75 °C hot water supply operation with Anti bacteria, the remote controller does not display 75 °C.

• Be careful not to burn yourself; Output water may be hotter than that displayed on the remote controller.

FC No. Setting item Default Setting available range

0A Anti bacteria set temperature 75 °C 65-80 °C

0B Anti bacteria holding time 30 min 0 - 60 min

Remote

controller 0C

Anti bacteria start time 22:00 0:00-22:00

Remote

controller 0D

Anti bacteria operation cycle 7 days Every day to 10 days

8-2. Operation Mode and Control Method

9) Anti bacteria operation An Anti bacteria operation regularly performs a Hot water supply operation with the set temperature TSC_H = 75 °C

(can be set with FC_0A).

1) How to operate

• Pressing the [ °C at the set cycle and time (both can be set with the remote controller FC) to start Anti bacteria operation.

• The first Anti bacteria operation starts when press the [Anti bacteria] button and starting time come.

• When the set temperature 75 °C is reached after the Anti bacteria operation started, the set temperature remains another 30 minutes (can be set with FC_0B).

• The priority zone determined by the outside temperature selects an operation, Hot water heat pump or hot water supply heater.

• The hot water heat pump operation, when selected, ignores the hot water supply start condition (TTW < 38 °C) and forcibly performs a hot water operation.

• During Anti bacteria operation (Forcible hot water operation at 75 °C), the hot water set temperature display is not changed. If it is changed from the remote controller, the normal hot water set temperature will be changed.

] button and then the remote controller [Anti bacteria] button changes the setting to TSC_H = 75

Related FC

Page 45

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting available range

Remote controllerOENight setback start Time setting 22:00 0:00-23:00

Remote controllerOFNight setback end Time setting 6:00 0:00-23:00

26 Night setback setting Temperature width 5 degree 3 -20 degree

58 Night setback setting activate 0. Zone 1 & 2 1. Zone 1 only

FC No. Setting item Default Setting available range

3A Frost protection Yes / No 1: Yes 0: No

3B Frost protection Set temperature 15 °C 10-20 °C

12 (Remote controller)

FROST running period (days) 0 0-20 days

13 (Remote controller)

FROST running period (hours) 0 0-23hours

8-2. Operation Mode and Control Method

10) Night setback operation A Night setback operation performs heating at 5K lower and cooling at 5K higher temperatures against the remote

controller set temperature from the setting start time (22:00) to the end time (6:00) every day.

Note) • Set the remote controller time before starting a Night setback operation.

• The set time can be changed with remote controller FC. (See 10-8 (See page 122))

Related FC

11) Frost protection operation A Frost protection operation performs heating at the set temperature RSC_F = 15 °C (FC).

1)How to operate

• Pressing the remote controller [ ] button and then the [Frost protection] button starts a heating operation at the

set temperature of 15 °C.

• Pressing again the [Frost protection] button cancels the Frost protection operation.

• The remote controller displays "F" as the temperature during Frost protection.

• A set temperature change during a Frost protection operation cancels the operation.

2)Automatic stop of Frost protection operation

• The operation period of Frost protection can be set at FC 12 and 13 on the remote controller.

Longest period available: 20 days and 23 hours

• By entering the operation period (day and hour) at FC 12 and 13 on the remote controller and pressing the [Frost

protection] button, the operation period is set and the Frost protection operation will automatically be finished after the period has passed.

• The operation period setting (day and hour) is stored in the memory.

Related FC

Page 46

Item Operation flow and applicable data, etc.

T2=0

Related FC

FC No.

Setting item Default range

2C Setting temperature A at T0 40 20~60 °C

2D Setting temperature B at T1 35 20~60 °C

2E Setting temperature C at T2 (= 0

°C) 30 20~60°C

2F Setting temperature D at T3 25 20~60 °C

30 Setting temperature E at 20

°C 20 20~60 °C

A1 Outside temperature T0 -20 -30~-20 °C

29 Outside temperature T1 -10 -15~0 °C

2B Outside temperature T3 10 0~15 °C

Set temperature shift with heating set to auto

0 -5 to 5K

TSC_F(°C)

A'(40)

(35)

(20)

(-20)

TO (°C)

(-10)

FC_A2=1 Fixed value method

TSC_F(°C)

A(40)

(35)

(30)

(25)

(20)

(-20)

T2=0

TO (°C)

(-10)

(10)

ZONE 1

ZONE 2

80 % (FC_31) of ZONE1

FC_A2=0 Percentage method

Auto-Curve in ZONE2 shows 80% (FC) of that of ZONE1, the water temperature setting does not fall below 20 °C.

The ZONE2 set temperature A' °C with the outside temperature T0 °C, B' °C with T1 °C, E' °C with 20 °C.

Related FC

FC No.

Setting item Default range A2 The choice of how to set ZONE2 0 0 or 1 A3 Setting temperature A' at T0 40 20~60 °C A4 Setting temperature B' at T1 35 20~60 °C A5 Setting temperature E' at 20 °C 20 20~60 °C

31 Auto-Curve ratio of ZONE2 80 0~100%

8-2. Operation Mode and Control Method

12) Auto operation An Auto operation sets the water temperature TSC_F depending on the outside air temperature TO.

1) How to operate

• Pressing the remote controller [

] button and then setting Auto mode "ON" starts Auto operation for heating.

• During an Auto operation, setting Auto mode "OFF" returns to the usual manual set heating operation.

• The remote controller displays "A" as the temperature during an Auto operation. (When 2-temperature control is enabled, the remote controller displays "A".)

• Long-pressing the [

] button in menu display activates the Auto-Curve FC change mode, enabling the set Auto-

Curve water temperature to be shifted by ±5K range (FC_27). When using the auto curve shift function please note the maximum and minimum water temperature at 60 °C and 20 °C respectively.

• Even if the temperature setting is changed during an Auto operation, the operation continues.

• An Auto operation works with a heating operation only, not with a cooling or a hot water supply operation.

<ZONE1>

• An operation starts at the set temperature of straight -line approximation for the following: water temperature A °C with the outside temperature T0 °C, B °C with T1 °C, C °C with T2 °C, D °C with T3 °C, and E °C with 20 °C.

TSC_F

(°C)

A(40)

B(35)

C(30)

D(25)

E(20)

5K adjustable (FC 27)

(-20)

(-10)

T3 (10)

(°C)

<ZONE2>

• Set temperature of the ZONE2 can be selected from two methods (FC_A2). One is a percentage of ZONE1, the other is a fixed value.

FC_A2 = "0" : Percentage method that is set by FC_31. FC_A2 = "1" : Fixed value method that is set by FC_A3, A4 and A5.

However, it is automatically controlled the set temperature of ZONE1 to be the ZONE2 or more.

Page 47

Item Operation flow and applicable data, etc.

Compressor frequency changeable range 10 Hz to 70 Hz (P805HR-E)

10 Hz to 90 Hz (P1105HR-E)

8-2. Operation Mode and Control Method

8-3. Hydro Unit Control

13) Night time low-noise operation A night time low-noise operation reduces operation frequency and the number of outdoor fan rotations for a certain period

during night time as noise control for urban operation.

Maximum operation frequency 40.2 Hz (Hot water supply/Heating/Cooling) Maximum fan tap 500 rpm (P805HR-E, P1105HR-E)

The night time low-noise operation is enabled / disabled by changing the remote controller FC_09.

<How to set> - Refer to “11. Night time Low-noise Setting” on page 139.

Select "Silent mode" in menu display, and set to "ON".

1) Capacity control (compressor, high-temperature release, low-temperature release)

This unit controls the compressor frequency and heater output so that the water outlet temperature matches the remote controller set temperature.

1-1) Compressor control

• Calculates the different between the remote controller set temperature (TSC_H, TSC_F) and the water outlet

temperature (Hot water supply: THO, Heating: TWO).

• Sets the Hz signal correction amount that determines the number of compressor rotations by the temperature

difference.

• Detects the number of compressor rotations.

• Compares the Hz signal correction amount and the current operation Hz, and changes the compressor output

according to the difference.

* The control details are the same for hot water supply, heating, and cooling.

Remote controller

Temperature settings

(TSC_H, TSC_F)

TSC_H-THO for hot water supply

TSC_F-TWO

for heating/cooling

Hz signal correction

Number of compressor

rotation detection

Hz signal correction ≤ Operation Hz

Inverter output change

Number of compressor

rotation change

Hydro unit

Water outlet temperature

(THO, TWO)

Page 48

Item Operation flow and applicable data, etc.

Forcible stop

O (down)

P (slow down)

Q (keep)

R2 (slow up)

R1 (slow up)

S (normal)

T10

T11

TC (TWO)

Zone Control operation

R1 Increase compressor frequency by 0.8 Hz every

60 sec.

R2 Increase compressor frequency by 0.4 Hz every

60 sec.

O Decrease compressor frequency by 4.5 Hz every

10 sec.

P Decrease compressor frequency by 2.4 Hz every

10 sec.

Q Keep compressor frequency.

TWI T7T8T9T10T11

TWI<10 8.0 6.0 4.0 3.0 2.5

10 ≤ TWI<15 8.5 6.5 4.5 3.4 2.5

15 ≤ TWI<20 9.0 7.0 5.0 4.0 2.5

20 ≤ TWI 9.5 7.5 5.5 4.5 2.5

Zone Control operation

S (normal) Normal cooling operation

P (slowdown)

Decrease compressor frequency by approx.

2.0 Hz every 10 sec.

O (down)

Decrease compressor frequency by approx.

4.0 Hz every 10 sec.

(Forced stop) Stop the compressor.

T7 T8 T9

TC+TWO 6.0 4.0 -15

8-3. Hydro Unit Control

1-2) Low temperature release control

A heat pump operation is performed as shown in the table below according to the TC sensor detecting temperature.

• For the detected temperature, TC = TWO of a heat pump operation is used. The values of T7 through T10 varies

depending on TWI. (See the table below)

• If the compressor frequency instruction from the hydro unit is less then 10 Hz, the compressor stops.

• TC < 3 °C causes the compressor to stop abnormally. When the compressor restarts when 140 seconds has

passed after the stop and TC < 3 °C is not detected for 20 minutes, the abnormal stop counter is cleared. 10 times of compressor abnormal stop stops the operation of heat pump, and fault code A11 is displayed on the remote controller.

* If the heat pump operation is switched to other operation, the abnormality detection counter is reset to 0.

TC=TWO (°C)

1-3) Freeze release control (TC+TWO release control)

For freeze prevention, the compressor is controlled during cooling operation as shown in the table below according to the calculated values of TC and TWO.

• If TC + TWO falls below -15 for a total of 10 times, the compressor stops abnormally and fault code A10 is displayed

on the remote controller.

• When cooling operation has lasted normally for 10 minutes, the abnormality detection counter is reset to 0.

TC+TWO

S : Normal

P : Down

O : Down

Forced stop

Page 49

Item Operation flow and applicable data, etc.

TSC_F-2

TSC_F-4

TSC_F-0

(+2)

THO

E zone

D zone

C zone

B zone

A zone

Diff : 2K

Abnormality detection (A02 displayed)

Heater off

KEEP

Heater output down every 5, 10, 15, or 20 minutes

Heater output up every 10, 20, 30, or 40 minutes

*1 HWS-P805 only

Status Heater ON/OFF

Heater 1 Backup-heater 3 kW = ON

Heater 2 Backup-heater 9 kW = ON

FC No. Setting item Default Setting available range

Forcibly heater off at TO ≥ A °C

no restriction -5 ~ 20 °C

8-3. Hydro Unit Control

2) Heater control 2-1) Hot water supply operation

During a hot water heat pump operation, the unit energizes the hot water cylinder heater (2.7 kW) when all the following conditions are met. Note that when the hot water supply set temperature (TSC_F) is reached, the unit stops energizing the heater.

• When 30 minutes has passed after the hot water heat pump operation started.

• The water inlet temperature (TWI) reaches 50 °C.

• The hot water cylinder sensor reaches the HP_OFF temperature (45 °C-FC).

• The HP_ON temperature (38 °C-FC) is reached without the hot water HP status.

• Hot water boost operation is in progress.

TTW

Z zone

Y zone Heater off

TSC_H

X zone Heater on

Heat pump_OFF(45)

(Heater on without hot water heat pump)

2-2) Heating operation

1) Heater control at the time of heat pump operation

• Object to be controlled: Backup heater The backup heater control starts when 13 minutes has passed after the heating heat pump operation started and select the ZONE (A-D). The backup heater control increases, decreases, or maintains the number of heaters every 10 minutes (FC) depending on the difference between the heating set temperature (TSC_F) and the heater outlet temperature (THO). When the heating set temperature (TSC_F) is reached, the hydro stops energizing the backup heater.

Abnormality detection (A03 displayed)

Diff : 2K

TSC_H-4

Hot water boost Heater on only with Hot water boost in operation

Heat pump_ON (38 °C) (Hot water heat pump)

(1) HWS-**M3-E model has the backup heater 1 of 3 kW only. (2) HWS-**T6-E model has the backup heater 2 of 3 kW. (Total 6 kW)

• Restriction of backup heater energization during heating mode (For energy saving) When outdoor temperature is higher than the reference valve, the backup heater is forcibly off during heating mode.

Related FC

Page 50

Item Operation flow and applicable data, etc.

Status Heater ON/OFF

Heater 1 Backup heater 3 kW = ON

Heater 2 Backup heater 9 kW = ON

Heater 3 Heater 2 + Booster heater

FC No. Setting item Default Setting available range

20 Hot water supply heat pump start temperature 38 °C 20-45 °C

21 Hot water supply heat pump stop temperature 45 °C 40-50 °C

33 Heater control of down time 1:10 min 0:5 min 2:15 min 3:20 min

34 Heater control of up time 0:10 min 1:20 min 2:30 min 3: 40 min

TSC_F - β

THO

Heater OFF

Heater ON

diff: 2K

Status Heater ON/OFF

Heater 1 Backup heater 3 kW = ON

FC No. Setting item Default Setting available range

β : 0 = 0K, ..., 4 = 40K

Recommendation : β = 2(20K)

0K 0K - 40K

8-3. Hydro Unit Control

2) Control at the time of heating heater operation

• Controlled Object: Backup heater, Booster heater The backup heater control starts when 13 minutes has passed after the heating heat pump operation started. The backup heater control increases, decreases, or maintains the number of heaters every 10 minutes (FC) depending on the difference between the heating set temperature (TSC_F) and the heater outlet temperature (THO). Note that when the heating set temperature (TSC_F) is reached, the unit stops energizing the heater.

THO

E zone

D zone

TSC_F+2

C zone

Abnormality detection

Diff : 2K

Heater off

Heater output down every 5, 10, 15, or 20 minutes

TSC_F-0

B zone

TSC_F-2

A zone

Diff : 2K

KEEP

Diff : 2K

Heater output up every 10, 20, 30, or 40 minutes

HWS-**M3-E model has the backup heater 1 of 3 kW only. HWS-**T6-E model has the backup heater 2 of 3 kW. (Total 6 kW) Booster heater operation come only output signal. (Booster heater activate under heater only mode)

Related FC

2-3) Heater control at the time of defrosting

• Object to be controlled: Backup heater When a defrosting operation starts during the heating heat pump operation, the unit energizes a backup heater (3 kW) according to the heater outlet temperature sensor (THO) and the set temperature (TSC_F) as shown in Figure.

1) When the heater outlet temperature sensor (THO) drops to the temperature of 2 °C below the TSC_F-β, the backup heater is energized. β can be changed for energy saving.

Defrosting ends according to the usual heater control.

Related FC

2-4) Forcible heater energization

To prevent freeze, the unit energizes or stops energizing a backup heater (3 kW) regardless of the unit status, not operated or in operation.

• Object to be controlled: Backup heater

1) Energization start condition: TWO < 4 or TWI < 4 or THO < 4

2) Energization stop condition: TWO ≥ 5 and TWI ≥ 5 and THO ≥ 5

Defrosting ends according to the usual heater control.

Page 51

Item Operation flow and applicable data, etc.

Item Operation Initial value DPSW

Circulation pump DPSW10

01:

Built-in circulation pump P1’s action during hot water supply operation: HP operation only / Always energized

OFF: HP operation

only

SW10-1

02:

Built-in circulation pump P1’s action during heating operation: Always energized / Turned off when TO sensor detect over than 20 °C.

OFF: Always

energized

SW10-2

03: External circulation pump P2’s action:

Non-synchronous / Synchronous with the built-in

circulation

pump P1

OFF: Non-

synchronous

SW10-3

04:

Built-in circulation pump

P1 ON/OFF cycling (During long periods of

system off)

OFF: None SW10-4

FC_code A0 Pump flow rate

0 (Default) 100%

190% 280% 370% 460% 550%

Boiler is installed or not

(DPSW13_2)

Boiler position

(DPSW02_1)

P1 pump control

Stop/restart temperatures

(TWI or TWO or THO)

OFF

(Not installed)

OFF (After 3-way valve, heating side) 70 °C / 68 °C

ON (Before 3-way valve) 70 °C / 68 °C

(Installed)

OFF (After 3-way valve, heating side) 70 °C / 68 °C

ON (Before 3-way valve) 58 °C / 55 °C

8-3. Hydro Unit Control

2-5) No heater operation

According to the DP_SW11 setting, the unit switches the energize / not energize for the hot water cylinder, backup heater, and booster. For details, see 10-1. (See page 117)

(Caution)

All heater should be added to this Air to water system. The system has been designed to operate with all electrical heaters energized.

3) Circulation pump control

One circulation pump (external circulation pump P2) can be connected to the unit in addition to the built-in circulation pump P1. You can change the settings of the built-in pump P1 and the external circulation pump P2 using DP_SW10-1, 2, and 3 in the hydro unit.

If the external circulation pump P2 is set to Non-synchronous, the pump P2 is always energized.

3-1) Controlling the built-in circulation pump P1

Pump type: DC motor, rated voltage 220-230 V, 6 speed (changed manually) The pump operation starts under the condition below:

• When the [

] or [ ] button is pressed.

The pump operation stops under the condition below:

• When the [ ] or [

] button is pressed.

(Operation will stop fully in about 1 minute.)

The pump operation stops/restarts under the conditions shown below.

• When changing operation modes, the pump stops for 30 seconds.

3-2) Controlling the built-in circulation pump P1 during the hot water supply operation

You can change the action of the built-in circulation pump P1 during the hot water supply operation using DP_SW10-1.

• DP_SW10-1 OFF (Default): The pump stops as the HP for hot water supply stops.

• DP_SW10-1 ON: The pump is always energized.

3-3) Controlling the built-in circulation pump P1 during the heating operation

You can change the action of the built-in circulation pump P1 during the heating operation using DP_SW10-2.

• DP_SW10-2 OFF (Default): The pump is always energized.

• DP_SW10-2 ON : The pump stops when To ≥ 20 °C. (Practically the HP for heating is turned off.)

3-4) Synchronized external circulation pump P2

Pump type: DC motor, rated voltage 220-230 V, connectable directly up to 200W rated power output. You can select whether the pump P2 is synchronized with the pump P1 using DP_SW10-3. The pump P2 is always

energized if the pump P2 is not synchronized.

• DP_SW10-3 OFF (Default): Non-synchronous

NOTE:

2 zone temperature control by boiler with P1 OFF is required DP_SW10-3 OFF

3-5) Controlling the external circulation pump P2

You can change the action of the external circulation pump P2 during cooling operation by setting FC64.

• FC64=”00”(Default): The pump is always energized.

• FC64=”01” : The pump is always stopped.

Page 52

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting value

5A Control of the pump P1 during the hot water supply operation

0: synchronized with HP1: Always energized

Equal to DPSW10-1

64 Control of the pump P2 during in cooling operation 0: Always ON 1: Always stopped

Control of the pump P1 while using the room temperature control or room temperature thermostat

0: Always ON

1: Stopped when the thermostat is OFF

9E Turn off the P1 when TO sensor detect over than this temperature 0: 20 °C 10~30 °C

Pump P1 restart diff TO sensor temperature, when turn off the P1 by to sensor detection.

2: 2K 1~5K

intermittent operation at TO ≥ A °C (heating)

0: continuous operation

-5 ~ 20 °C

intermittent operation at TO < B °C (cooling)

0: continuous operation

25 ~ 35 °C

8-3. Hydro Unit Control

3-6) Controlling the built-in circulation pump P1 during cooling operation controlled with the room temperature thermostat

or room temperature remote controller. You can change the action of the built-in circulation pump P1 by setting FC65.

• FC65=”00”(Default): The pump is always energized.

• FC65=”01” : The pump is stopped when the thermostat is turned off.

3-7) Interval operation of the pump P1 during thermostat off operation (For energy saving)

The pump of the hydro unit performs intermittent operation according to the outdoor temperature during thermostat off (compressor off) operation.

NOTE:

When boiler is installed (DPSW13_2 : ON), do NOT set intermittent operation or do NOT set the valve of A (FC_BA) lower than the Boiler-heat pump switching temperature (FC_23). A, lower limit of To during the heating operation, must be higher than the Boiler-heat pump switching temperature. Because when To is lower than the Boiler-heat pump switching temperature, the boiler output is ON state. But if the pump stops due to the intermittent operation, the boiler output is also turned OFF.

Related FC

Page 53

Item Operation flow and applicable data, etc.

Model Determined that water flows when: Determined that water does not flow when:

HWS-P805**-E 13L or more water flows per minute Water less than 13L flows per minute

HWS-P1105**-E 18L or more water flows per minute Water less than 18L flows per minute

TSC_ΔT2 ≤ TSC_ΔT-2 ≤ TSC_ΔT < 2 -2 > TSC_ΔT

Control value + 1 step (Open) ± 0 step - 1 step (Close)

Initial value Driving range 1 step Control cycle

6 0-12 3 WV move 7.5 degrees 4 min (FC)

FC No. Setting item Default Setting available range

0C Mixing Valve operation time 60 30 - 240 sec

59 Mixing Valve control time 4 1 - 30 min

Right terminal on the main remote controller

8-3. Hydro Unit Control

4) Control by the flow switch Whether water flows or not is judged with the ON/OFF of the flow switch.

Without water-flow determination from the flow switch after the hot water supply operation, heating operation, or cooling operation, The HP, backup heater and booster heater are not energized. Similarly, The “A01” error indication flashes if the flow switch judged that water does not flow. The specification of the flow switch is the same in P805**-E and P1105**-E. The flow setting differs due to the specification of piping in the hydro unit.

5) Mixing Valve control (2-temperature heating control) To set different radiator unit supply temperatures or floor heating supply temperatures, the unit performs Mixing Valve

control. When Mixing Valve "Yes" is selected, the unit controls Mixing Valve every 4 minutes (FC) based on the difference TSC_Δ T between the Zone2 set temperature and TFI (floor inlet water temperature sensor) temperature as follows:

To enable 2 zone temperature control switch DP_SW12-3 to ON.

NOTE:

The mixing valve will automatically be reset if 24 hours pass with the valve fully closed. 2 zone temperature control by boiler with P1 OFF is required DP_SW10-3 OFF.

Related FC

6) Room temperature control

You can install a sub remote controller (separately purchased) in a room to control room temperature.

6-1) Installing the sub remote controller

• Wiring with the main unit (See the figure on the right) : After detaching the front

panel, connect the sub remote controller to the right terminal on the main remote controller, which is connected with the hydro unit. (No polarity)

• Place to install (inside a room): At the height of 100 cm-150 cm on a wall

Opposite to the radiator or fan coil installed No assignment when floor heating is used on the room.

6-2) Room temperature control settings

• Function code setting:FC_40="1"

• Setting of the remote controller Temperature control “ON”.

(Setting → Initial setting → Temperature control)

Page 54

Item Operation flow and applicable data, etc.

T_rc

Correction control Heating Cooling

D zone

Setting is corrected upward Water temperature setting is up by 1deg every 30 minutes.

Setting is corrected upward Water temperature setting is down by 1deg every 30 minutes.

C zone No correction No correction

B zone

Setting is corrected downward. Water temperature setting is down by 1deg every 30 minutes.

A zone

Thermo off. But if inlet water detect less 25 °C, then heat pump restart.

Thermo off

A’ zone

Setting is corrected downward. Water temperature setting is down by 1deg every 39 minutes.

Thermo off

FC No. Setting item Default Variable range

18 Upper limit of cooling temperature setting 25 18-25 °C

19 Lower limit of cooling temperature setting 7 7-18 °C 1A Upper limit of heating temperature setting (Zone 1) 60 37-60 °C 1B Lower limit of heating temperature setting (Zone 1) 20 20-37 °C

40 Room temperature control 0 0:Not permitted 1:Permitted

Initial water temperature setting when controlling cooling by the room temperature remote controller and room temperature thermostat

20 10-25 °C

Initial water temperature setting when controlling heating by the room temperature remote controller and room temperature thermostat

40 20-60 °C

02 (Remote controller)

Room temperature correction (at heating) -1 -10K - +10K, 1K step

03 (Remote controller)

Room temperature correction (at cooling) -1 -10K - +10K, 1K step

B2 Heat pump restart water condition in A zone. 25 20-37 °C

Choose of the initial setting temperature. Either use the temperature set in FC_9D, or use the temperature calculated by Auto curve. This applies heating operation only.

0 : Use the temperature

set in FC_9D

1 : Use the temperature

calculated by Auto curve

8-3. Hydro Unit Control

6-3) Control method

• The water temperature setting at starting operation is 40 °C (FC_9D) at heating and 20 °C (FC_96) at cooling. If the temperature setting calculated by Auto curve at starting operation will be used instead of the fixed temperature 40 °C (FC_9D), FC_B5 should be set to “1”.

• The target water outlet temperature is adjusted by 1deg every 30 minutes based on the TSC_rc, the temperature setting on the remote controller, and the room temperature (temperature indicated on the remote controller: T_rc). The adjustable range of water temperature is set with FC18-1B.

• The temperature set on the remote controller and actual room temperature may differ depending on the place of the remote controller or room space. In that case, adjust temperature detection using FC02 (for heating) and FC03 (for cooling) on the remote controller.

Warm-mode

TSC_rc+2K

TSC_rc+1K

A’ zone:Thermo off

A zone:Thermo off

TSC_rc+0.5K

TSC_rc

B zone:Down water temp

TSC_rc

TSC_rc+0K

C zone:Keep water temp

TSC_rc-0.5K

TSC_rc-1.0K

D zone:Up water temp

How to shift up/down the temperature by remote controller FC02, 03

• Ambient temperature (remote controller) is higher than room temperature: example. 1deg Change remote controller FC02, 03 = “-1K” to “-2K”

• Ambient temperature (remote controller) is lower than room temperature: example. 1deg Change remote controller FC02, 03 = “-1K” to “0”

Cool-mode

D zone:Down water temp

C zone:Keep water temp

B zone:Up water temp

A zone:Thermo off

Related FC

Page 55

Item Operation flow and applicable data, etc.

PJ17

Terminal label

TCB-PCMO3E

CN210 Red

CN211 Black

Room thermostat Correction control Heating operation Cooling operation

Setting is corrected upward

Thermo on The water temperature setting is turned up by 1 degree every 30 minutes.

Thermo off The water temperature setting is turned up by 1 degree every 30 minutes.

OPEN

Setting is corrected downward.

Thermo off The water temperature setting is turned down by 1 degree every 30 minutes.

Thermo on The water temperature setting is turned down by 1 degree every 30 minutes.

FC No. Setting item Default Variable range

Initial water temperature setting when controlling heating by the room temperature remote controller and room temperature thermostat.

40 20-60 °C

Initial water temperature setting when controlling cooling by the room temperature remote controller and room temperature thermostat.

20 10-25 °C

Choose of the initial setting temperature. Either use the temperature set in FC_9D, or use the temperature calculated by Auto curve. This applies heating operation only.

0 : Use the temperature

set in FC_9D

1 : Use the temperature

calculated by Auto curve

8-3. Hydro Unit Control

7) Room temperature control with the thermostat You can install a commercially available thermostat to control room temperature.

7-1) Installing the room temperature thermostat

• TCB-PCM03E optional PC board is required. Connect its connection cable to CN211 port on the PC board of the hydro unit.

• Wiring to the main unit: connect the optional PC board TCB-PCM03E to the hydro unit after detaching the front panel. Thermostat for heating : Connect TCB-PCM03E between the terminals (1) and (3). Thermostat for cooling : Connect TCB-PCM03E between the terminals (2) and (3).

• Place to install (inside a room): At the height of 120 cm-180 cm on a wall Opposite to the radiator or fan coil installed No assignment when floor heating is used on the room.

7-2) Room temperature thermostat control setting

• Setting of DPSW on the hydro unit DP_SW02_4=“ON” (Default “OFF”)

7-3)Heating thermostat operation

When the heating thermostat does not reach the assigned temperature (the circuit between (1) and (3) is closed), heating starts under the setting that water temperature for heating is 40 °C (FC_9D). If the heating thermostat has not reached the assigned temperature 30 minutes after heating had started, the water temperature setting is turned up 1 degree, and the same action will be repeated every 30 minutes until the thermostat reaches the assigned temperature. The backup heater and booster heater are controlled in the same way as in the normal HP operation.

When the heating thermostat reaches the assigned temperature (the circuit between (1) and (3) is open), the heat

pump shifts to the “thermostat off” operation. During the operation, the water temperature setting is turned down by 1 degree every 30 minutes. The backup heater and booster heater are tuned off as the heat pump shifts to the “thermostat off” operation.

7-4)Cooling thermostat operation

When the cooling thermostat does not reach the assigned temperature (the circuit between (2) and (3) is open), cooling starts under the setting that water temperature fro cooling is 20 °C (FC_96). If the cooling thermostat has not reached the assigned temperature 30 minutes after cooling had started, the water temperature setting is turned down 1 degree, and the same action will be repeated every 30 minutes until the thermostat reaches the assigned temperature.

When the cooling thermostat reaches the assigned temperature (the circuit between (2) and (3) is closed), operation

shifts to the “thermostat off” operation. During the operation, the water temperature setting is turned up by 1 degree every 30 minutes.

Related FC

Page 56

Item Operation flow and applicable data, etc.

PJ17

Terminal label

TCB-PCMO3E

CN210 Red

CN211 Black

FC No. Setting item Default Setting value

Hot water HP allowance while cooling + hot water supply

0:Not allow 1:Allow

8-3. Hydro Unit Control

8) Hot water cylinder thermostat control Hot water can be supplied using an existing hot-water cylinder with a thermostat.

8-1) Installing the hot-water cylinder thermostat

• Optional board : TCB-PCM03E optional PC board is required. Connect its connection cable to CN210 port on the PC board of the hydro unit.

• Wiring with the main unit : After detaching the front panel, install TCB-PCM03E optional PC board in the hydro unit. Hot-water cylinder heating thermostat : Connect this thermostat between (1) and (2) on TCB-PCM03E.

• Place to install the thermostat (hot-water cylinder) : At a height of 30 to 50 cm from the base.

• Hot-water heater : A hot-water heater is required. (Without a hot-water heater, the hydro unit will not work.)

8-2) Setting the hot-water cylinder thermostat

Setting of DPSW on the hydro unit : DP_SW02_3 = “ON” (Default “OFF”)

8-3) Hot-water thermostat operation (hot-water supply operation only)

If hot water is used when the hot-water thermostat is at the assigned temperature (the circuit between (1) and (2) is open), the hot-water heat pump starts with the hot-water thermostat closed. After 30 minutes, the hot-water cylinder heater turns on, but the hot-water heat pump continues running until the hotwater cylinder thermostat becomes open. It should be noted, however, that the hot-water heat pump might stop if the water input temperature becomes high.

8-4) Hot-water thermostat operation (hot-water supply + heating operation)

If hot water is used when the hot-water thermostat is at the assigned temperature (the circuit between (1) and (2) is open), the hot-water heat pump starts with the hot-water thermostat closed. In 30 minutes, the hot-water heat pump stops. After that, only the hot-water cylinder heater is used to raise water temperature. The heat pump switches to heating operation. Unless the hot-water cylinder thermostat temperature rises, the hotwater heat pump will never take over.

8-5) Hot-water thermostat operation (hot-water supply + cooling operation)

For automatic switching to hot-water supply plus cooling operation, FC-0F is required. If hot water is used when the hot-water thermostat is at the assigned temperature (the circuit between (1) and (2) is open), the hot-water heat pump starts with the hot-water thermostat closed. In 30 minutes, the hot-water heat pump stops. After that, only the hot-water cylinder heater is used to raise water temperature. The heat pump switches to cooling operation. Unless the hot-water cylinder thermostat temperature rises, the hotwater heat pump will never take over.

Related FC

Page 57

Item Operation flow and applicable data, etc.

PJ17

Terminal label

TCB-PCMO3E

CN210 Red

CN211 Black

RC on condition

RC off condition

Operation Heating × × status 1 Hot water × ×

open signal input

Operation Heating status 2 Hot water

close signal input close signal input

Operation Heating × × status 3 Hot water ×

×××× ××××

open signal input

Operation Heating status 4 Hot water

Operation pattern

FC61=1 & FC52=2

Manually ON/OFF change by remote controller

↓

8-3. Hydro Unit Control

9) Control of force stop and restart The unit can be stopped and restarted with external input. By setting FC52, FC61 and FCB6, you can set an operation

mode to run/stop or can run/stop the unit in the mode assigned on the remote controller.

• TCB-PCM03E optional PC board is required. Connect its connection cable to CN210 port on the PC board of the hydro unit.

9-1)Setting the control method

Select a control method by setting FC52.

• FC52=“0”:Stops ESTIA as the circuit between the terminals (1) and (3) is closed. (Default)

• FC52=“1”:Stops ESTIA as the circuit between the terminals (1) and (3) is opened.

• FC52=“2”: Starts ESTIA as the circuit between the terminals (1) and (3) is closed.

Stops ESTIA as the circuit between the terminals (1) and (3) is opened.

• FC52=“3”:Starts/Stops ESTIA as the circuit between the terminals (1) and (3) is received closed plus.

9-2)Setting the object to control

Select an operation mode by setting FC61.

• FC61=“0”:Hot water supply and heating (Default)

• FC61=“1”:Follows the setting on the remote controller (If the hot water supply operation, heating operation, or hot water supply + heating operation is started manually after the unit was stopped with an external input, the new status is reflected to the setting on the remote controller.)

• FC61=“2”:Hot water supply only

• FC61=“3”:Heating only

It is possible to control each of the heating and hot water supply with the following settings:

• FCB6=“1” (Default “0”) and FC61=“3” and DP_SW02_3=“OFF” (Default “OFF”) The terminals (1) and (3) is the heating control.

The terminals (2) and (3) is the hot water supply control. Both of control method is selected by FC52.

9-3)Cautions

The circuit between the external input terminals (1) and (3) is also used to control the limit of heat pump operation. You cannot use the forced stop control when the circuit is configured to control the limit of heat pump operation. (See

page 58)

9-4)Setting example

• When you want to turn on/off the unit with static external input reflecting the operation setting on the remote controller (hot water supply, heating, or hot water supply and heating). FC52=“2”, FC61=“1”

Page 58

Item Operation flow and applicable data, etc.

RC on condition

× RC off condition

Operation Heating × × status 1 Hot water × ×

Pulse input

Operation Heating × × ×

××

status 2 Hot water × × ×

Pulse input

Pulse input Operation Heating status 3 Hot water × ×

Pulse input

Operation Heating × × × status 4 Hot water × × ×

FC61=1 & FC52=3

Operation pattern

Manually ON/OFF change by remote controller

↓

FC No. Setting item Default Setting value

52 Control method 0 See page 121

61 Object to control 0 See page 121

8-3. Hydro Unit Control

Basic operation logic

There are 4 operation combination pattern for Heating & Hot water When open signal is input, the operation status change to the next status. For example, if current operation status is heating ON and hot water OFF, then next status to be heating OFF & hot water OFF when pulse is input Hydro unit memorize the status of the operation pattern before changing OFF status by close signal. If pulse is input at operation status 2, the operation pattern in the status 3 is same pattern in the status 1.

Manually ON/OFF

If customer change operation pattern manually by remote controller, change then operation pattern will not be same as the basic logic.

1. If customer stop operation (Heating off and hot water off) by the controller, then both heating& hot water are not to be ON with close or open signal

2. If the unit is stopped (Heating off and hot water off) by open signal, operation pattern will be referred to the pattern before the unit OFF by close signal.

• When you want to turn on/off with the pulse input reflecting the operation setting on the remote controller (hot water supply, heating, or hot water supply and heating). FC52=“3”, FC61=“1”

There are 4 operation combination pattern for Heating & Hot water When pulse signal is input, the operation status change to the next status. For example, if current operation status is heating ON and hot water OFF, then next status to be heating OFF & hot water OFF when pulse is input Hydro unit memorize the status of the operation pattern before changing OFF status by pulse signal. If pulse is input at operation status 2, the operation pattern in the status 3 is same pattern in the status 1.

If customer change operation pattern manually by remote controller, then operation pattern will not be same as the basic logic.

1. If customer stop operation (Heating off and hot water off) by the controller, then both heating& hot water to be ON with pulse input

2. If the unit is stopped (Heating off and hot water off) by pulse input, operation pattern will be referred to

Related FC

the pattern before the unit OFF by pulse.

Page 59

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting value

Changing the condition of optional output (For the optional PC board connected to CN209)

0: 1-2 During defrosting

2-4 While compressor is running.

1: 1-2 As error is detected

2-4 During operation

8-3. Hydro Unit Control

10) Control of limit of heat pump operation When the peak period of electric power charge is set due to the contract or other conditions, you can limit heat pump

operation and give priority to boiler operation using an external input signal. (This control functions only during the period the signal is input.)

• TCB-PCM03E optional board is required. Connect its connection cable to CN210 port on the PC board of the hydro unit.

TCB-PCMO3E

PJ17

Terminal label

10-1)Setting the control method

Select an operation mode by setting FC61.

• FC61=“4”:Hot water cylinder heater = OFF, backup heater = OFF (Built-in circulation pump is ON.)

• FC61=“5”:Hot water cylinder heater = OFF, backup heater = OFF, heat pump = OFF, Built-in circulation pump is stopped.

10-2)Control summary

When the TEMPO signal is input (the circuit is closed), the boiler signal is output regardless the outside temperature and devices are turned off following the setting on FC61.

1. Basic operation: heating operation using the boiler

2. Switching to hot water supply: the water circuit is switched to the hot water supply side as the unit detect that TTW is less than 38 °C.

3. Switching to heating: the water circuit is switched to the heating side as the unit detect that TTW is 45 °C or more, or 30 minutes has passed since operation started. Heating operation continues at least 30 minutes.

4. The LED on the PC board lights up when the input signal is ON.

CN210 Red

CN211 Black

11)Output signal control 1

(TCB-PCIN3E optional PC board is required. Connect its connection cable to the CN208 terminal on the PC board in the hydro unit.)

• The circuit between the terminals (1) and (2) gets closed as an error detection signal is output.

• The circuit between the terminals (3) and (4) gets closed as a boiler signal is output. The LED on the PC board lights up when the signals are output.

12)Output signal control 2

(TCB-PCIN3E optional PC board is required. Connect its connection cable to the CN209 terminal on the PC board in the hydro unit.)

< FC67=“0”: Default >

• The circuit between the terminals (1) and (2) is closed during defrosting.

• The circuit between the terminal (3) and (4) is closed while the compressor is running.

< FC67=“1” >

• The circuit between the terminals (1) and (2) gets closed as an error is detected.

• The circuit between the terminals (3) and (4) is closed during operation (when the remote controller is ON) The LED on the PC board lights up when the signals are output.

Related FC

TCB-PCIN3E

Terminal label

PJ20

CN208 Blue

CN209 Green

Page 60

Item Operation flow and applicable data, etc.

Flow rate [L/min]

Head [m]

Minimum flow rate

Hydraulic heat exchanger (8 kW) QH characteristics

0 5 10 15 20 25 30 35

Pump duty

80 %

Pump duty

100 %

Pump duty

60 %

Hydro unit QHCharacteristics (220/230 V)

Out of range

Minimum flow rate

Hydraulic heat exchanger (11 kW) QH characteristics

Head [m]

0 1020304050

Flow rate [L/min]

Pump duty

100 %

Pump duty

80 %

Pump duty

60 %

Hydro unit QHCharacteristics (220/230 V)

Out of range

8-3. Hydro Unit Control

13) Q-H characteristics of hydro unit

The following shows the Q-H characteristics.

13-1)HWS-P805XWHM3-E, T6-E, T9-E

13-2)HWS-P1105XWHM3-E, T6-E, T9-E

Page 61

Item Operation flow and applicable data, etc.

8-3. Hydro Unit Control

14) Automatic restart control

The unit records operation information before a power outage and retrieves the information after the power is restored to restart automatically the operation with the information.

14-1)Operation during remote controller

• The operation status before a power outage automatically restarts after the power is restored. (The merit functions are also enabled)

• Approximately 6 hours or more after a power outage The operation status before a power outage automatically restarts after the power is restored. But the merit functions (Night setback, Anti bacteria) are disabled.

• The remote controller time displays "00:00". (The merit functions are disabled)

14-2)Operation during forcible automatic operation

A forcible automatic operation is performed when the power is restored after a power outage.

14-3) Operation during defrosting operation

When the power is restored after a power outage, the usual operation restarts. Note: The operation details recorded before a power outage

Operation mode: Hot water supply, Heating, Cooling, Hot water supply + Heating, Hot water supply + Cooling Set temperature: Hot water set temperature, Heating set temperature, Cooling set temperature

Merit function: Hot water supply operation (Anti bacteria)

15) Piping freeze prevention control

Heating operation (Night setback)

This control operates when the power is on regardless the remote controller setting ON or OFF. To prevent frost bursting of the water piping for hot water supply and heating, the unit flows water with the circulation pump when the temperature sensor value falls below a certain temperature.

15-1)Piping freeze prevention control 1

1) Start condition: TWO < 4 °C or THWI < 4 °C.or THO < 4 °C

2) End condition: TWO ≥ 5 °C and TWI ≥ 5 °C and THO ≥ 5 °C

3)-1 How to operate (circulation pump)

• When the circulation pump is not in operation, if the sensor detects the freeze prevention control start temperature, the unit operate the circulation pump.

• During a freeze prevention operation, a heat pump operation does not start.

• When neither [Hot water supply] nor [heating/cooling] is in operation, if the end condition is not met when 3 minutes has passed after an operation starts, the unit performs the operation in 3)-2 to prevent freeze.

3)-2 How to operate (circulation pump + backup heater)

• When neither [Hot water supply] nor [heating/cooling] is in operation, if the end condition is not met when 3 minutes has passed after an operation starts.

• End condition: TWO ≥ 5 °C and TWI ≥ 5 °C and THO ≥ 5 °C

• Heating with the set temperature 55 °C operates.

3)-3 Abnormal stop

• If a freeze prevention operation continues for 30 minutes and does not meet the end condition, the operation stops as abnormal stop. (Remote controller check code: A05)

15-2)Piping freeze prevention control 2

TC and TWO activates freeze prevention regardless of a heat pump operation mode.

1) Determination condition: TWO>20 °C. 2*TC+TWO<-12 °C is continuously detected for 180 seconds or longer. Or TWO ≤ 20 °C. TC+TWO<4 °C is continuously detected for 180 seconds or longer.

2) Determination cancellation conditions

• The stop or operation mode is changed by the remote controller

• The mode is defrosting at the time of determination

At the next time of defrosting, the start condition is not met.

• The mode is other than defrosting at the time of determination

After cooling, heating, hot water heat pump restarts, the start condition is not met for 10 minutes.

3) Error display

• If freeze determination cancellation condition is not met, A04 error is displayed.

15-3)Piping freeze prevention control 3

This control applies only when defrosting is in operation.

1) Determination condition: During defrosting, TWI ≤ 15 °C is continuously detected for 30 seconds or longer (After the stop, the unit restarts.)

2) Determination cancellation condition

• At the next time of defrosting, the start condition is not met.

3) Error display

• If freeze determination cancellation condition is not met, A04 error is displayed.

Page 62

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting available range

62 Activate/deactivate A02 error detection 0: Activate 1: Deactivate

8-3. Hydro Unit Control

15-4)Piping freeze prevention control 4

When the value of Ps sensor is low, freeze prevention is activated regardless of a heat pump operation mode.

1) Determination condition: Low pressure sensor detects PS < 0.2 MPa and 90 seconds passes (defrosting and

2) Determination cancellation condition

• After a restart, the start condition is not met for 180 minutes.

• At the next time of defrosting, the start condition is not met. (Defrosting operation for heating or hot water supply)

3) Error display

• If freeze determination cancellation condition is not met, A08 error is displayed.

16) High return water protect control

cooling) (During a defrosting operation for cooling and heating, or hot water supply) Low pressure sensor detects PS < 0.2 MPa and 10 minutes passes (heating and hot water supply operation)

The hydro unit protects against high return water which made by separate boiler system.

TWI, TWO, THO

When A02 error appeared, the built-in circulation pump will stop.

Related FC

This FC62 function is valid when DP_SW13-2 is ON. (See 10.1-1. Setting switch names and positions)

A02 error detect

(Diff : 2K)

Heat pump stop

Heat pump normal operation

Page 63

Item Operation flow and applicable data, etc.

8-4. Outdoor unit control

1) PMV (Pulse motor valve) control Valve opening is controlled using the expansion valve with a pulse motor according to a heat pump operation status.

• PMV is controlled between 30 and 500 pulses during an operation.

• At the time of a cooling operation, PMV is controlled with the usual target value of 1 to 4 K temperature difference between TS sensor and TC sensor.

• At the time of a hot water supply or heating operation, PMV is controlled with the usual target value of -1 to 4 K (for P805HR-E, P1105HR-E) temperature difference between TS sensor and TE sensor.

• For both cooling and heating, if the cycle is overheated, PMV is controlled using the TD sensor. The usual target value is 91 °C for a cooling operation, and 96 °C for a heating operation.

* A defective sensor may cause liquid back flow or abnormal overheat of the compressor, significantly shortening the

compressor life. If the compressor or other equipment is repaired, first check that the resistance of each sensor or the refrigerant cycle has no problem, then start the operation.

2) Discharge temperature release control This control detects an abnormality of the refrigerant cycle or compressor to perform failure prevention.

• This control reduces operation frequency if the PMV control does not lower the outlet temperature or if the outlet temperature rapidly rises. The frequency control is broken down to the unit of 0.6 Hz to stabilize the cycle.

• If the discharge temperature detects the abnormal stop zone, the compressor stops and then restarts after 150 seconds. The abnormality detection counter is cleared when the operation continues for 10 minutes. If detected 4 times, the error code is displayed and the compressor does not restart.

* An abnormality could occur due to too less refrigerant, PMV defective, or cycle stuck.

• For details about an error displayed, see the check code list.

TD [°C]

Abnormal stop

111

Frequency normal down

109

Frequency slow down

106

Frequency hold

103

Frequency slow up

(up to the point instructed)

As instructed

Page 64

Item Operation flow and applicable data, etc.

Outdoor unit current inverter

Main circuit control current

Compressor operation Hz down

Outside air temperature (TO)

Current release point setting

Capacity control continue

Operation current ≤ Settings

Current degradation

Yes

Outside temperature

TO (degree °C)

Current release value (A)

P805HR-E, P1105HR-E

27.5 ≤ TO 15.0

15 ≤ TO < 27.5 20.0 - (To - 15) × 0.4

TO < 15 20.0

Outside temperature

TO (degree °C)

Current release value (A)

P805HR-E, P1105HR-E

44 ≤ TO 15.0

39 ≤ TO < 44 17.7

10 ≤ TO < 39 20.0

15.0

20.0

CT(A)

15 27.5 TO

Heating, Hot water supply

17.7

15.0

20.0

CT(A)

10 39 44 TO

Cooling

8-4. Outdoor unit control

3) Current release control The number of compressor rotation is controlled so that current value of the compressor drive circuit does not exceed the

specified value.

• The outdoor unit detects the input current.

• The outside air temperature is detected and used to set the specified value of current.

• The number of compressor rotation instructed by the hydro unit is used to determine whether the current value exceeds the specified value.

• If exceeds, the number of compressor rotation is reduced to the most approximate number instructed by the hydro unit within the specified value range.

Heating, Hot water supply

Cooling

No cooling operation available for TO < 10 °C.

Page 65

Item Operation flow and applicable data, etc.

Temperature range P805HR-E, P1105HR-E

50 °C ≤ TO 14.1

45 °C ≤ TO < 50 °C 14.1

39 °C ≤ TO < 45 °C 14.1

TO < 39 °C 14.1

TO error 14.1

W1 W2 W3 W4 W5 W6 W7 W8

P805HR-E, P1105HR-E

Upper 200 240 240 260 320 380 480 500

Lower 0 0 200 280 360 400 500 520

W9 WA WB WC WD WE WF

P805HR-E, P1105HR-E

Upper 530 610 640 660 720 780 890

Lower 550 630 660 700 740 820 910

Temperature range

Less than 20 Hz

20 Hz or more to less

than 45 Hz

45 Hz or more

Minimum Maximum Minimum Maximum Minimum Maximum

38 °C ≤ TO W6 WC W8 WC WA WD

29 °C ≤ TO < 38 °C W5 WB W7 WB W9 WC

15 °C ≤ TO < 29 °C W4 W8 W6 WA W8 WC

5 °C ≤ TO < 15 °C W3 W6 W5 W8 W7 WA

0 °C ≤ TO < 5 °C W2 W4 W4 W6 W5 W8

-4 °C ≤ TO < 0 °C W2 W3 W3 W5 W4 W6

TO < -4 °C W1 W2 W1 W4 W2 W6

TO error W1WCW1WCW2WD

8-4. Outdoor unit control

4) Current releases shift control During a cooling operation, this control prevents the electronic parts, such as a compressor drive element, and

compressor from failing.

• The current release control value (I) is selected from the following table according to the TO sensor value.

Current release control value (I)

5) Outdoor fan control The outdoor side control part controls the number of fan motor rotations by receiving an operation instruction from the

Hydro side (Hydro unit) control part. For sensing the true outside temperature, fan is operated without compressor operation.

* Although the fan motor is a DC motor, which has non-step variable numbers of rotations, it is limited to some steps for convenience of

control.

The number of fan tap rotation allocation [rpm]

5-1) Cooling fan control

• The TL sensor, TO sensor and operation frequency control the outdoor fan. The control is performed by 1 tap of

the DC fan control (14 taps).

• For 60 seconds after the start, the maximum fan tap for each zone that is shown in the following table is fixed. After

that, the fan is controlled according to the TG. (TG: temperature converted from PD)

TG [°C]

WE tap

+ 1 tap/20 secs (Up to the maximum number of rotation for each zone)

Number of rotation hold

- 1 tap/20 secs (Up to the minimum number of rotation for each zone)

HWS-P805HR-E, P1105HR-E

Page 66

NOTE

Item Operation flow and applicable data, etc.

Temperature range

Less than 20 Hz

20 Hz or more to less

than 45 Hz

45 Hz or more

Maximum Maximum Maximum

30 °C ≤ TO W4 W4 W6

25 °C ≤ TO < 30 °C W5 W5 W7

20 °C ≤ TO < 25 °C W6 W7 W8

10 °C ≤ TO < 20 °C W7 W8 W9

5 °C ≤ TO < 10 °C W9 WA WA

-3 °C ≤ TO < 5 °C WA WA WB

-10 °C ≤ TO < -3 °C WB WB WB

TO < -10 °C WD WD WD

TO abnormal WD WD WD

8-4. Outdoor unit control

5-2) Hot water supply and heating fan control

1) The TE sensor, TO sensor and operation frequency control the outdoor fan.

(The minimum W1 to the maximum are controlled according to the table below.)

2) For 3 minutes after the start, the maximum fan tap for each zone that is shown in the following table is fixed. After

that, the fan is controlled according to the TE sensor temperature. If TE ≥ 24 °C continues for 5 minutes, the operation stops. No error code is displayed for this; the status is the same as

the usual thermostat off. The operation restarts after 150 seconds. This intermittent running is not abnormal.

If the heat-pump was thermo-off, the out-door fan motor (up/down) continue to run 10 min with W3 rotation. When the water pump of hydro unit turns on, the fan motor will operate sensing value of outside air temperature (TO).

TE [°C]

-2 tap/20 secs (to W1) Stop time count

-2 tap/20 secs (to W1)

-1 tap/20 secs (to W1)

Number of revolutions hold

+ 1 tap/20 secs (Up to the maximum tap for each zone)

Page 67

Item Operation flow and applicable data, etc.

Heating operation starts

-2

-5

-10

-23

TE [

°C

]

0 10 15 39 45 55 [d]

[min]

D zone

A zone

B zone

C zone

*1 In 10 to 15 minutes after the heating

operation starts, the lowest value of TE is recorded as TEO, and the lowest temperature of To as ToO.

To Normal

A Zone Maintain " (TEO - TE) - (ToO - To) ≥ 3 °C" for 20 sec

B Zone Maintain " (TEO - TE) - (ToO - To) ≥ 2 °C" for 20 sec

C Zone Maintain " TE ≤ -23 °C" for 20 sec

D Zone Accumulate compressor operation status of TE < -2 °C for 150 min

8-4. Outdoor unit control

6) Defrosting control 6-1) Defrost operation This control defrosts the outdoor heat exchanger. The temperature sensor (TE sensor) of the outdoor heat exchanger

determines frost formation, and then defrosting is performed in the 4-way valve reverse defrosting method.

1) During a heating operation, defrosting is performed when the TE sensor meets any of the conditions in A through D

zones.

2) During defrosting, when TE sensor maintains 12 °C or higher for 3 seconds or 7 °C ≤ TE < 12 °C for a minute, the

defrosting ends. Also, when defrosting continues for 10 minutes even if the TE sensor temperature is below 7 °C, the defrosting ends.

3) After the defrosting, stop the compressor for approx. 40 seconds before starting a heating operation.

4) Switching the jumper "J805" and "J806" of the outdoor control board can change the time of d above mentioned.

(Factory default: 150 minutes)

Page 68

Item Operation flow and applicable data, etc.

J805 J806 [d]

O O 150 min (Factory default)

O × 90 min

× O 60 min

× × 30 min

Advance defrosting

Defrosting operation

Compressor

OFF

40.1 Hz

Outdoor fan

OFF

4-way valve

OFF

Outdoor PMV

430 pulse

500 pulse

0 pulse

Dotted line shows a operating image.

30s

40s

20s

30s

40s

8-4. Outdoor unit control

Jumper switching O: Short circuit ×: Open

6-2) Advance defrost operation When compressor temperature is low, defrosting preliminary operation will be carried out to carry defrosting smoothly in

effect.

1) Start condition of advance defrosting

•TD < 50 ºC and A, B, C or D zone detected.

2) Conditions for changing over from defrosting preliminary operation to defrosting.

• When TD ≥ 50 °C is detected during defrosting preliminary operation.

• When thermostat is turned off during defrosting preliminary operation.

• When defrosting preliminary operation is carried out more than 10 minutes.

3) Control details

• Target SH during defrosting preliminary operation will be 6 to 10 K. (refer to 8-4-1 (See page 62))

• PMV control interval will be shorter than normal.

• Operation frequency will be fixed.

*1. When TD ≥ 50 °C, Advance defrosting will be skipped.

Page 69

Item Operation flow and applicable data, etc.

8-4. Outdoor unit control

7) Winding heating control

1) This control energizes the inactive compressor instead of the case heater to warm the compressor. The purpose is

to prevent the refrigerant from staying inside the compressor.

2) After the unit is installed, failure to perform energization for the given time period may cause the compressor to fail.

Also, when starting an operation long after the power left off, first energize the compressor before starting the operation in the same way as a trial run.

3) Energization is determined by the TD sensor and TO sensor. If the TO sensor fails, the TE sensor automatically takes

over the operation. Determine if the TO sensor has failed check the LED’s on the outdoor unit PCB.

4) If TD is 30 °C or higher, the energization stops.

(Usual)

Not energized

Intermittently energized 10 mins: ON / 5 mins: OFF

*Energization condition TD 30 °C

°C

Output "equal to 40W"

°C

Continuously energized Output "equal to 40W"

(when TO sensor fails)

Not energized

Intermittently energized 10 mins: ON / 5 mins: OFF Output "equals to 40W"

Continuously energized Output "equals to 40W"

*Energization condition TD 30 °C

°C

Notes During winding energization, energizing noise may be heard, but this is not abnormal.

8) Short circuit operation prevention control

1) In 11 minutes after the operation start, the compressor may not stop for protection. This status is not abnormal. (The

operation duration time of the compressor varies depending on a operation status.)

2) If the operation stops with the remote controller, the operation does not continue.

9) Over current protection control

1) A detection of abnormal current with the over current protection control stops the compressor.

2) Set the abnormality detection counter to 1, and restarts the compressor after 150 seconds.

3) When the stop by over current protection control counts 8 times, error code is displayed and the compressor does

not restart. (Remote controller error code display: HO1)

Page 70

Item Operation flow and applicable data, etc.

3.3 0

3.4 0

3.5 0

3.6 0

3.7 0

3.8 0

3.9 0

4.0 0

4.1 0

0 102030405060708090

PD sensor [MPa]

Compressor freque ncy [Hz]

b,c

Normal operation

Bottom plate heater is turned on

Bottom plate heater is turned off

8-4. Outdoor unit control

10) High pressure release control

1) To prevent excessive high pressure rise, operating frequency is controlled by the PD sensor.

2) If the PD sensor detects an abnormal stop zone pressure, the compressor stops and the abnormality detection

counter increments.

3) When the compressor stops in 2), the heat-pump operation restarts when the pressure decrease to zone "e" (normal

operation) after 150 seconds passed.

4) When the compressor stops in 2), the abnormality detection counter is cleared when the operation continues for 10

minutes. If the counter counts 10 times, error code is displayed on the remote-controller and the compressor does not restart.

5) For details about an check code displayed, see the check code list. (See page 74)

11) Compressor case thermostat The compressor case thermostat functions to protect the compressor when the blow-out temperature from the compressor is too high.

• The compressor case thermostat on the upper part of compressor stops the compressor.

• The compressor will restart three minutes after stopping.

• If the compressor case thermostat functions again after restarting (functions at 125 °C), compressor stops and the “H04” error code is indicated.

12) Bottom plate heater control Control ON and OFF of the bottom plate heater using the outdoor temperature sensor (TO).

Page 71

Item Operation flow and applicable data, etc.

Tg(Pd)

X zone

Y zone

B zone

C zone

A zone

8-4. Outdoor unit control

13) 2-way valve control To control the bypass 2-way valve, reducing the minimum capacity and reducing the pressure increase purpose.

Bypass circuit is connect the discharge pipe and the suction pipe of the compressor.

1)Bypass operation start condition The operation start in the following cases. (On cases of 2-way valve.)

<Heating or hot water supply> Any of the following cases

Pd is the case of X zone.

•(To ≥ B zone) and (compressor operation Hz is low). Pd is the case of Y zone. (To ≥ B zone) and (compressor operation Hz is low) and (Operation of the previous time of 12 minutes or less)

<Defrosting> Any of the following cases

•TWI < 36 °C

•TC+TWO<9 °C

<Cooling> Any of the following cases

•(To ≤ B zone) and (compressor operation Hz is low)

•(To ≤ B zone) and (When the hydro unit is operating release control.)

The operation stop in the following cases. (Off cases of 2-way valve.)

When the 2-way valve turned on once, it does not turn off for 5 minutes.

<Heating or hot water supply> Any of the following cases

•(Pd ≤ Y zone) and (When the compressor rotational speed is

increasing.)

•(Pd ≤ Y zone) and (To ≤ C zone)

•When the compressor is stopped.

•When the compressor is stopped.

<Cooling> Any of the following cases

•(Compressor rotational speed is increasing.) and (The hydro unit is not

operating release control.)

•When the compressor rotational speed is increasing.

14) Start up from hibernation This control operates at startup, in order to warm up the compressor by the heat from the water. System is operated at a defrost cycle when the start condition is satisfied. System is switched to the normal heating operation when the end condition is satisfied. 14-1)Start conditions

This control is operated when starting the compressor in a state that all of the following conditions is satisfy.

•Compressor off time is 2 hours or more (Also start up at the first time after turn on the power.)

•TD ≤ 40 °C and TWI ≥ 25 °C and TO ≤ 3 °C

14-2)End conditions

When one of the following conditions is satisfy, operation is switched to the normal heating.

•10 minutes has passed since operation started.

•TD ≥ TWI+10 °C

•TG ≥ TWI TG : Condensing temperature calculated from the Pd

•TWI < 25 °C

Page 72

9 Method of defect diagnosis

In order to diagnose the defective part of the heat pump system, first understand the symptom of the defect. (1) Check the operation status. (It does not move, or it moves but stops, etc.) (2) Flashing display on the display part of the hydro unit. (3) Check the “check code” by the remote controller.

Please refer to the following procedure of defect diagnosis for the identification.

No. Procedure of defect diagnosis Remark

Matters to be confirmed first 9-1-1. Check the power supply voltage

9-1-2. Check for any miswiring of the

9-1

Non-defective operation (program operation) Non-defective program operations for the

9-2

Outline of the determination diagram

9-3

connection cables between the hydro unit and the outdoor unit

9-1-3. About the installation of the

temperature sensor

9-3-1. Procedure of defect diagnosis 9-3-2. How to determine from the check

code on the remote controller

9-3-3. How to cancel a check code on the

remote controller

9-3-4. How to diagnose by error code

Check the power supply for the heat pump hot water heater, the crossover between the hydro unit and the outdoor unit, and the installation of temperature sensors.

protection of the heat pump unit.

With reference to the "check code", roughly identify the defect from the defect diagnosis for the heat pump hot water heater and determine the defective part from individual symptoms.

Diagnosis flow chart for each error code

9-4

Operation check by PC board 9-5-1. Operation check mode The operation check mode allows to

9-5

Brief method for checking the

9-6

key components

9-4-1. Hydro unit failure detection 9-4-2. Outdoor unit failure detection 9-4-3. Temperature sensor, temperature-

resistance characteristic table

9-6-1. Hydro unit 9-6-2. Outdoor unit

determine good or not by checking the operation of the 4-way valve, 2-way valve and pulse motor valve.

How to determine the presence of any defect particularly in functional parts.

Page 73

9-1. Matters to be confirmed first

9-1-1. Check the power supply voltage

Check that the power supply voltage is AC220-230 V± 10% (signal phase). If the power supply voltage is not in this range, it may not operate normally.

9-1-2. Check for any miswiring of the connection cables between

the hydro unit and the outdoor unit

The hydro unit and the outdoor unit are connected with three connection cables. Make sure the interconnecting connections between the hydro unit and the outdoor unit terminal blocks are connected to the correct terminal numbers. If not connected correctly, the heat pump system does not operate. However, a miswiring would not cause damage to the equipment.

9-1-3. About the installation of the temperature sensor

If each sensor is removed due to the replacement of the water heat exchange or inverter board, or the replacement of the refrigeration cycle parts, make sure to put the sensor back to the position where it was before.

• Each sensor position has a marking. Make sure to put it back to the exact position.

• Make sure to install it with a sensor holder so that the temperature sensing part of the sensor and the straight part of the copper piping are attached with each other tightly.

• If the installation of the sensor is incomplete or the installed position is wrong, it will not perform a normal control operation and may cause a defect such as a malfunction of the equipment or an occurrence of an abnormal sound, etc.

9-2.

Non-defective operation (program operation) … No fault code display appears.

In order to control the heat pump unit, there are the following operations as the built-in program operations in the microcomputer. If a claim occurs about the operation, please confirm whether it falls under any of the contents in the following table.

If it does, please understand that the symptom is not a defect of the equipment, and it is an operation necessary for the control and maintenance of the heat pump unit.

Table 9-2-1 Non-defective operation

No. Operation of the heat pump system Explanation

The compressor sometimes does not operate even within the

range of compressor “ON”.

During the hot water supply or heating operation, without reaching the set temperature, the compressor operation

frequency stays at a frequency of less than the maximum Hz or lowers down.

The “Stop” operation on the remote controller will not stop the

circulation pump. (The same for hot water supply, heating and cooling)

“ON” on the remote controller will not operate the compressor. (It will not operate even after the reboot delay timer elapsed)

When the power is turned on, it starts operation without operating the remote controller.

The compressor does not operate during the operation of the compressor reboot timer (3 min). Even after the power activation, the compressor reboot timer continues to be active.

It may be caused by the high temperature release control (release protection control by the temperature of the water heat exchanger) or the current release control, or the high pressure release control.

In order to deal with the temperature increase in the heat exchanger after stopping, the operation continues for 1 min after the compressor is stopped.

When the outdoor temperature (TO sensor detection temperature) is -25 °C or lower, the heat pump will not operate in order to protect the compressor, and the heater will operate instead.

• The auto restart operation may be working.

• The antifreeze operation may be working.

• If the TWI, TWO or THO sensor detects a temperature below 4 °C, the operation changes from circulation pump

--->> circulation pump + heater.)

Page 74

9-3. Outline of the determination diagram

The first determination of whether a defective part is in the hydro unit or the outdoor unit can be performed by the following method.

9-3-1. Procedure of defect diagnosis

In the case of a defect, please apply the following procedure in order to find the defective part.

Defect

Confirm the check code on the remote controller display

Check code

A01-A13

Check code

L07-L16

Check code

FXX

Abnormality in the outdoor unit or hot-water tank unit

Yes

Defect in Hydro unit

Abnormality in the communication or setting system

Abnormality in the water heat exchange or outdoor unit sensor system

9-3-2. How to determine from the check code on the remote

controller

If the defect is limited by the check code displayed on the remote controller, please repair the defect based on the table on the next page. The check codes are separated into two groups: software and hardware errors.

Since a hardware error cannot be cancelled without a part replacement etc., please perform a repair. If its abnormality is determined, the abnormality is noticed by indicating the check code on the remote controller

check code display part while sounding off a buzzer.

Check code display part

MON

ZONE1 ZONE2 HOT WATER

HEAT/COOL HOT WATER

9-3-3. How to cancel a check code on the remote controller

Press [ ] or [ ] button (on the operation side) to clear the check code.

Although the above procedure cancels the check code, the hardware error will be displayed again until the hardware repair is completed.

Page 75

9-3-4. How to diagnose by error code

Defect mode detected by the Hydro Unit

O ... Possible

× .... Not possible

Check

code

Pump or flowing quantity error

1) Detected by TC sensor TC≥63 °C is detected in the heating or hot water supply heat pump operation (except for defrosting).

2)Detected by flow switch abnormality When no signal of the flow switch is

showing 2 min after the built-in circulation pump operation started.

A01

3)Detection of chattering abnormality in the flow switch input

Chattering detection: Detects input changes (OFF⇔ON) 4 times within 10 seconds during operation.

4)Disconnection of the flow switch connector

When the stopped built-in circulation pump starts its operation, the flow switch status is detecting "water flow".

Temperature increase error (heating) When one of the TWI, TWO and THO

A02

sensors exceeds 70 °C.

Temperature increase error (hot water supply)

A03

When the TTW sensor exceeds 85 °C.

Antifreeze operation (1)

1)TWO>20 °C condition: 2×TC+TWO≤-12 °C is detected.

2)TWO≤20 °C condition: TC+TWO≤4 °C is detected.

3)TWI≤10 °C is detected during

A04

A05

defrosting.

Piping antifreeze operation

Activating the heater under the condition of TWO<4orTWI<4orTHO<4 does not achieve TWO,TWI,THO≥5 °C after 30 min elapsed.

Diagnostic functional operation

Operational cause

Backup

operation

Heating

Automatic

reset

Hot water

Heating

Hot water

Heating

Hot water

Determination and action

1. Almost no or little water flow.

• Not enough vent air

• Dirt clogging in the water piping system.

• The water piping is too long.

• Installation of buffer tank and secondary pump

1. Disconnection of the flow switch

connector.

2. Defect of the flow switch.

1. Check the water inlet, water outlet

and heater outlet (TWI, TWO, THO) sensors.

2. Defect of the backup heater (defect

automatic reset thermostat).

1. Check the hot water cylinder sensor

(TTW).

2. Check the hot water cylinder thermal

cut-out.

1. Almost no or little water flow.

• Dirt clogging in the water piping system.

• The water piping is too long, or too short.

2. Check the heater power circuit.

• Power supply voltage, breaker, power supply connection

3. Set the presence of the backup

heater.

4. Check the water inlet, water outlet

and heat exchange (TWI, TWO, TC) sensors and Flow Switch.

1. Check the heater power circuit.

• Power supply voltage, breaker, power supply connection

2. Check the water inlet, water outlet

and heater outlet sensors (TWI, TWO, THO).

3. Disconnection of the backup heater.

Number of

abnormalities

for

confirmation

482

882

282

183

184

Heating8

Hot water8

Cooling4

186

Detailed

item

Page 76

Check

code

Combination error

A07

Model name of the Hydro unit is different.

Low pressure sensor operation error

The low pressure sensor detected 0.2 MPa or less.

A08

Overheat protection operation

When the thermostat of the backup heater activates during the operation of

A09

the heat pump or backup heater. When the thermostat operation is activated while it has been stopped.

Antifreeze operation (2)

When TC-TWO<-15K detected in

A10

cooling mode.

Operation of the release protection

When the TWO release counts to 10.

A11

Heating, hot water heater

The antifreeze control is detected under the condition of TWI<15 °C while

A12

TWI≥15 °C, TTW≥20 °C is not detected after the heater backup.

A13 Pump error

Regular communication error between hydro unit and remote controller

E03

When there is no regular communication from the remote controller for 3 min, or when no remote controller is equipped.

Diagnostic functional operation

Operational cause

Backup

operation

Heating

Hot water

Heating Cooling

Hot water

Heating

Hot water

Automatic

reset

× O

Number of

Determination and action

1. Check DP_SW13_4 is set to "ON". 1 —

1. Almost no or little water flow.

2. Defect of the flow switch.

3. On-load cooling or prolonged

defrosting (a lot of frost formation) under the above conditions.

4. Defect in the low pressure sensor.

5. Check the refrigeration cycle (gas

leak)

1. No water (heating without water) or

no water flow.

2. Defect of the flow switch.

3. Defect of the backup heater (poor

automatic reset thermostat).

1. Almost few water flow.

2. Defect of the flow switch.

3. Low refrigerant.

1. Almost no water flow.

2. Defect of the flow switch.

3. Check the water outlet temperature

sensor (TWO).

1. Activated by a large load of heating

or hot water supply.

2. Check the heater power circuit

(backup or hot water cylinder heater).

• Power supply voltage, breaker, power supply connection

1. Pump has stopped by a certain

cause.

• Low supply voltage.

• High humidity around the electric box of the pump.

• Dew condensation to the electric board of the pump.

• Once turn off the power supply to the system and turn on again and operate the system.

2. Check the Flow switch in the Hydro

unit.

1. Check remote controller connection.

2. Defect in the remote controller.

abnormalities

for

confirmation

887

10 89

10 90

191

292

1—

Detailed

item

Page 77

Check

code

Regular communication error between hydro unit and outdoor unit

E04

The serial signal cannot be received from outdoor.

Duplicate address of Hydro unit, or

E08

Duplicate master Hydro unit during Group control

Regular communication error

E18

between master Hydro unit and slave Hydro unit during Group control

TC sensor error

F03

Open or short circuit in the heat exchange temperature sensor.

TWI sensor error

F10

Open or short circuit in the water inlet temperature sensor.

TWO sensor error

Open or short circuit in the water outlet

F11

temperature sensor.

Diagnostic functional operation

Operational cause

Backup

operation

Automatic

reset

× O

Heating

Hot water

Determination and action

1. Check the serial circuit.

• Miswiring of the crossover between the water heat exchanger and the outdoor unit

1. Set the address No. of the Rotary

switch "SW01" correctly for each Hydro unit.

1. Check the Hydro unit connection.

• Miswiring of the master and slave Hydro unit.

1. Check the resistance value and

connection of the heat exchange temperature sensor (TC).

1. Check the resistance value and

connection of the water inlet temperature sensor (TWI).

1. Check the resistance value and

connection of the water outlet temperature sensor (TWO).

Number of

abnormalities

for

confirmation

192

1—

193

195

Detailed

item

Page 78

Check

code

TTW sensor error

Open or short circuit in the hot water

F14

cylinder sensor.

TFI sensor error

Open or short circuit in the floor

F17

temperature sensor. (Only when zone 2 is used)

THO sensor error

Open or short circuit in the heater outlet

F18

temperature sensor.

Detection of THO disconnection error

When TWO–THO>15K is detected and

F19

30 sec elapsed.

TFI sensor error

When TWO–TFI>40K is detected and

F20

TFI<TWI–5K is detected 60 sec.

Low pressure sensor error

When PS<0.07 MPa is detected for 90 sec or more. (cooling, defrosting)

F23

When PS<0.07 MPa is detected for 10 min or more. (hot water supply, heating)

EEROM error

F29

Inconsistency is detected once without verify ACK after writing to EEPROM.

Extended IC error

F30

When the extended IC is abnormal.

Combination error

L02

Model name of the outdoor unit is different.

Communication error

L07

Individual hydro units have a group line.

Communication error

The capability code for the hydro unit

L09

has not been set.

Setting error

L16

When ZONE1 has not been set, while ZONE2 has been set.

Slave Hydro unit error which occurs when error occurs in master Hydro unit

P31

Diagnostic functional operation

Operational cause

Number of

Backup

operation

Heating

Hot water

Heating

Hot water

Heating

Hot water

Heating

Hot water

Heating

Hot water

Automatic

reset

××

Determination and action

1. Check the resistance value and

connection of the hot water cylinder sensor (TTW).

1. Check the resistance value and

connection of the floor-inlet temperature sensor (TFI).

1. Check the resistance value and

connection of the heater outlet temperature sensor (THO).

1. Check for any disconnection of the

heater outlet temperature sensor (THO).

2. Defect of the flow switch.

1. Check the connection of the floor-

inlet temperature sensor (TFI).

1. Check the connection (body or

connection wiring) of the low pressure sensor.

2. Check the resistance value of the

low pressure sensor.

3. Check the refrigeration cycle (gas

leak)

1. Replace the water heat exchange

control board.

1. Replace the water heat exchange

control board.

1. Check the model name of the

outdoor unit.

1. Replace the water heat exchange

control board.

1. Check the setting of the FC01

capability specifications. HWS-P805xx-E = 0012 HWS-P1105xx-E = 0015

abnormalities

for

confirmation

196

197

198

199

1100

××1. Check the body DP-SW12_2,3. 1 100

1. Check the remote controller

connection.

× O

2. Defect in the remote controller.

3. Set the address No. of the Rotary

switch "SW01" correctly for each Hydro unit.

1—

Detailed

item

Page 79

Defect mode detected by the outdoor unit

O ... Possible

× .... Not possible

Check

code

TD sensor error

F04

Open or short circuit in the discharge temperature sensor.

TE sensor error

F06

Open or short circuit in the heat exchange temperature sensor.

TL sensor error

F07

Open or short circuit in the heat exchange temperature sensor.

TO sensor error

F08

Open or short circuit in the outdoor temperature sensor.

TS sensor error

F12

Open or short circuit in the suction temperature sensor.

TH sensor error

F13

Open or short circuit in the heat-sink temperature sensor.

TE, TS sensors error

TE, TS sensor connections are

F15

opposite.

PD sensor error

F24

Open or short circuit in the high pressure sensor.

F31 EEPROM error O

Compressor breakdown

1 When the operation frequency lowers

due to the current release 40 sec or later after the compressor activation and it stops by underrunning the minimum frequency.

H01

2 When the operation frequency lowers

due to the current limit control and it stops by underrunning the minimum frequency.

3 When an excess current is detected

0.8 sec or later after the compressor activation.

Compressor lock

1 When the input current is more than

H02

H03

zero 20 sec or later after the compressor activation and the activation has not been completed.

Defect in the current detection circuit

Diagnostic functional operation

Operational cause

Backup

operation

Automatic

reset

O ×

Number of

Determination and action

1. Check the resistance value and

connection of the discharge sensor (TD).

1. Check the resistance value and

connection of the heat exchange temperature sensor (TE).

1. Check the resistance value and

connection of the heat exchange temperature sensor (TL).

1. Check the resistance value and

connection of the outdoor temperature sensor (TO).

1. Check the resistance value and

connection of the suction temperature sensor (TS).

1. Check the resistance value and

connection of the heat-sink temperature sensor (TH).

1. Check for any wrong installation of

the heat exchange temperature sensor (TE) and the suction temperature sensor (TS).

1. Check the value of PD sensor by the

remote controller.

abnormalities

for

confirmation

4111

8111

4111

4112

Detailed

item

110

111

× 1112

1. Check the power supply voltage

(AC220-230 V±10%).

2. Over-loaded condition of the

refrigeration cycle.

3. Check that the service valve is fully

open.

1. Defect of compressor (lock)

– Replace the compressor.

2. Defect of compressor wiring (open

phase).

1. Replace the outdoor inverter control

board.

8101

8102

8—

Page 80

Check

code

Operation of case thermostat

When the case thermostat exceeds 125 °C.

H04

Unset service PC board jumper

L10

Jumpers J800-J803 have not been cut.

Combination error

L15

Model name of the Hydro unit is different.

The communication between the outdoor PC board MUCs error

L29

No communication signal between IPDU and CDB.

The outlet temperature error

When the discharge temperature sensor

P03

(TD) exceeds 111 °C.

P04 The high pressure switch error O

The power supply voltage error

P05

When the power supply voltage is extremely high or low.

Overheating of heat-sink error

When the heat-sink exceeds 105 °C.

P07

Detection of gas leak

When the discharge temperature sensor (TD) exceeds 106 °C for consecutive 10 min. When the suction temperature sensor (TS) exceeds 60 °C for cooling or 40 °C

P15

for heating for 10 consecutive min. When TG TG

≤ TWI-15 K is detected 10min. (hot

water supply, heating) When TG 10min. (cooling)

The 4-way valve inversion error

When the heat exchange temperature sensor (TE) exceeds 30 °C or the

P19

suction temperature sensor (TS) exceeds 50 °C during the heat pump operation.

Diagnostic functional operation

Operational cause

≤ TC -10 K is detected and

≤ TE -12 K is detected for

Backup

operation

Automatic

reset

1. Check the refrigeration cycle (gas

2. Check the case thermostat and

3. Check that the service valve is fully

4. Defect of the pulse motor valve.

5. Check for kinked piping.

× 1. Cut J800-J803. 1 103

1. Check the model name of the Hydro

××

2. Check DP_SW13_4 is set to "ON".

× 1. Replace the outdoor control board. 1 103

1. Check the refrigeration cycle (gas

2. Defect of the pulse motor valve.

3. Check the resistance value of the

× 10 104

1. Check the power supply voltage.

1. Check the thread fastening and

2. Check the heat-sink fan duct.

3. Check the resistance value of the

1. Check the refrigeration cycle (gas

2. Check that the service valve is fully

3. Defect of the pulse motor valve.

4. Check for kinked piping.

5. Check the resistance value of the

6. Check the PD sensor by remote

1. Check the operation of the 4-way

2. Defect of the pulse motor valve.

3. Check the resistance value of the

Determination and action

leak).

connector.

open.

unit.

leak).

discharge temperature sensor (TD).

(AC220-230 V±10%).

heat-sink grease between the outdoor control board and the heatsink.

heat-sink temperature sensor (TH).

leak).

open.

discharge temperature sensor (TD) and the suction temperature sensor (TS).

controller.

valve unit or the coil characteristics.

heat exchange temperature sensor (TE) and the suction temperature sensor (TS).

Number of

abnormalities

for

confirmation

10 102

1103

4103

8105

4105

8106

4107

Detailed

item

Page 81

Check

code

High pressure protection operation

When an abnormal stop occurs due to the high pressure release control. When the high pressure sensor (PD) detects 4.05 MPa.

P20

Diagnostic functional operation

Operational cause

Backup

operation

Automatic

reset

Determination and action

1. Check that the service valve is fully

open.

2. Defect of the pulse motor valve.

3. Check the outdoor fan system

(including clogging).

4. Over-filling of refrigerant.

5. Check the value of the high pressure

sensor (PD).

6. The water piping is too short.

Install a buffer tank, or set the setting temperature lower.

Number of

abnormalities

for

confirmation

10 108

Detailed

item

Outdoor fan system error

When a DC fan rotor position detection NG, element short circuit, loss of

P22

synchronization, or abnormal motor current occurs.

Short circuit of the compressor driver element error

When an abnormal short circuit of IGBT is detected.

P26

Compressor rotor position error

The rotor position in the compressor cannot be detected.

P29

1. Check the lock status of the motor

fan.

2. Check the connection of the fan

motor cable connector.

3. Check the power supply voltage.

(AC220~230 V±10%)

1. P26 abnormality occurs when

operating with the compressor wiring disconnected … Check the control board.

2. No abnormality occurs when

operating with the compressor wiring disconnected … Compressor rare short.

1. Even if the connection lead wire of

the compressor is disconnected, it stops due to an abnormality in the position detection … Replace the inverter control board.

2. Check the wire wound resistor of the

compressor. Short circuit … Replace the compressor.

8109

Page 82

Defect mode detected by the remote controller

Diagnostic functional operation

Check code

Not

displaying at

all

(cannot operate by the remote

controller)

E01

E02

E09

Operational cause

No communication between hydro unit an remote controller

• The remote controller wiring is not connected correctly.

• The hydro unit has not been turned on.

No communication between hydro unit and remote controller

• Disconnection of the crossover between the remote controller and the base unit of the Hydro unit (detected on the remote controller side).

Defect in the signal transmission to the hydro unit.

(Detected on the remote controller side)

Several remote controller base units

(Detected on the remote controller side)

Status of airconditioning

Stop – Defect in the remote controller power

Stop (Automatic reset)

Stop (The handset continues)

Condition

Displayed when the abnormality is detected.

Determination and action

supply

1. Check the remote controller wiring.

2. Check the remote controller.

3. Check the hydro unit power supply wiring.

4. Check the water heat exchange control board.

Defect in the reception of the remote controller

1. Check the remote controller crossover.

2. Check the remote controller.

3. Check the hydro power supply wiring.

4. Check the water heat exchanger board.

Defect in the transmission of the remote controller

1. Check the transmitter circuit inside the remote controller.

… Replace the remote controller.

1.2 Check several base units with the

remote controller

… The base unit is only one, and others

are handsets.

Page 83

9-4. Diagnosis flow chart for each error code

Built-in circulation

pump rotates

Replace TC sensor

Remove waste

Dirt clogging inside water circuit

12 M or longer water pipe to a branch, or 5 or less branches

Fit buffer tank and the second pump

Attach or replace flow switch

Connect flow switch connector to board

(Identify causes, and resolve)

(strainer)

Excess air noise

comes from inside

the pump

Flow switch is

connected to board

Pump is

connected to board

Flow switch is normal

Chattering noise comes

from flow switch

Pump stops 2-3

minutes after its rotation

started

TC sensor characteristic

is correct

Yes

[A01] occurs

Operation restarts

Water heat exchanger control board

is defective, replace it

Perform

air vent

Flow shortage

No (No pump sound)

Connect pump connector to board

Replace flow switch

Yes

Flow switch is normal

Yes

Replace pump

Yes

9-4-1. Hydro unit failure detection

[A01] Error Pump flow determination

Page 84

[A02] Error Temperature rise and error short circuit

Replace TWI, TWO, and THO sensors

(TWI,TWO,THO ≥ 70 °C)

TWI, TWO, and THO

sensor characteristics are

correct

Yes

Water outlet

temperature is 70

°C

or higher

Yes

Correct water circuit (To prevent hot water of other circuits from entering)

Yes

Hot water from

boiler or other circuits does

not come in

Failure of backup heater (Too large heater input, thermostat short circuit)

Replace heater unit

Yes

Backup heater is energized

(Measure heater current)

Start

Replace water heat exchange control board

Yes

Flow switch is normal

Replace flow switch

• If Boiler setting is ON (DPSW13-2 is ON) and FC62 is “1”, the A02 error is not detected.

Page 85

[A03] Error Temperature rise and error short circuit

Replace TTW sensor

(TTW ≥ 85 °C is detected)

TTW sensor

characteristic is correct

Yes

Hot water cylinder heater

is energized

Yes

At normal

temperature, tank thermostat

is energized

Yes

Replace hot water cylinder thermostat

Hot water cylinder

thermostat operates

Yes

Operation temperature 82 °C

Start

Replace water heat exchange control board

Replace Mg-sw

Mg-sw (RY05) for

heater operates

Yes

Operating noise at normal time

Page 86

[A04] Error Freeze prevention control

(Refer to Characteristic table on page 113)

When the outside temperature and inlet water temperature is low (approx. 20 °C or lower) and the room load is large (operation frequency ≥ rating), the freeze prevention control may be activated.

Start

Operation restart

Perform

air vent

Secure water circulation amount

Dirt clogging inside water circuit

(inside strainer, etc)

Replace flow switch

Yes

Excess air

inside pump

Chattering from

flow switch

Short circuit piping

Water heat

exchanger board DP_SW11-1

is ON

Yes

Backup

heater terminal has

AC 220-230 V

( ± 10 %)

Yes

Circulation flow shortage

Total water amount in the system is too little, or water piping is too short

Power is

connect to backup

heater terminal

12 M or longer water pipe to a branch, or 5 or less branches

Fit buffer tank and the second pump

Set DP_SW11-1 to ON

Connect backup heater power cable

Backup

heater element

is conductive

Yes

TC, TWO, TWI

sensor characteristics

are correct

Yes

Replace water heat

exchange control board

Yes

(Backup heater NG)

(See Characteristic table on page 101)

Set heater breaker to ON Check hydro wiring

Replace backup heater unit

Replace TC, TWO, and TWI sensors

Page 87

[A05] Error Piping freeze prevention control

(Refer to Characteristic table on page 113)

Restart

TWI 4, TWO 4, or

THO 4 is detected

Circulation pump keeps

being energized or 3 minutes

passed after the start

Water heat

exchange control board

DPSW11-1 is ON

Yes

Backup heater terminal has 220-230 V (± 10 %)

Yes

Backup heater element

is conductive

Yes

TWI, TWO, THO

sensor characteristics

are correct

Power is connect to

built-in heater terminal

(Backup heater NG)

Yes

Set water heat board DPSW11-1 to ON

Place power cable for backup heater

Set breaker for backup heater to ON, or Check hydro electronic wiring

Replace backup heater and safety valve

Replace TWI, TWO, and THO sensors

Yes

Replace water heat

exchange control board

Page 88

[A08] Error Low pressure sensor lowering operation failure (Cooling / Defrosting

Replace flow switch

Remove waste

Flow switch is normal

Secure water circulation amount

Circulation flow shortage

Waste stuck inside water circuit

12 M or longer water pipe to a branch, or 5 or less branches

Remove sufficiently excess air

Place buffer tank and the second pump

Excess air

noise comes from

inside pump

Chattering

noise comes from

flow switch

Start

Yes

Raise set temperature

Yes

(Cooling overload operation)

Continued

operation at low outside

temperature and at 15 °C or lower

set temperature

Defrost outdoor unit where frost remains

Yes

Defrosting

takes 15 mins or longer

(Frost remains)

Replace low pressure sensor

Low pressure sensor

is normal

Yes

Replace water heat

exchange control board

operation)

Page 89

[A09] Error Overheat prevention thermostat failure (Hot water supply / Heating operation)

Put water into water circuit (Recommended: 1 - 2 Bar)

Replace heater unit exchanger air vent valve

Replace flow switch

Water cycle contains water

Yes

Flow switch is normal

Yes

At normal temperature,

overheat preventive thermostat

is normal

Yes

Start

Replace water heat exchange control board

or overheat preventive thermostat failure

*Replace water heat exchange control board or overheat preventive thermostat failure: After the control board is replaced, if the same operation repeats, the overheat preventive thermostat is determined as defective (does not operate at 75 °C).

Page 90

[A10] Error Freeze prevention control (2) (Cooling only)

Note: Determined at TWO-TWI temperature during operation at a pressure of Ps

Yes

Sufficient refrigerant

Operating with

no load on water

circuit?

Replace flow switch

Remove waste

Flow switch is normal

Secure water circulation amount

Circulation flow shortage

Replace control board.

Waste stuck inside water circuit

12 M or longer water pipe to a branch, or 5 or less branches

Remove sufficiently excess air

Place buffer tank and the second pump

Recharge refrigerant

Raise the set water temperature. Add fan coils.

Excess air

noise comes from

inside pump

Chattering

noise comes from

flow switch

Start

Yes

Page 91

[A11] Error Release protection operation

Replace flow switch

Remove waste

Flow switch is normal

Secure water circulation amount

Circulation flow shortage

Waste stuck inside water circuit

12 M or longer water pipe to a branch, or 5 or less branches

Remove sufficiently excess air

Place buffer tank and the second pump

Excess air

noise comes from

inside pump

Chattering

noise comes from

flow switch

Start

Yes

Attach TWI sensor

TWI sensor is

attached to pipe

Yes

Replace TWI or TWO sensor

TWI and TWO

sensor characteristics

are normal

Yes

Replace water heat

exchange control board

Page 92

[A12] Error Heating or Hot water supply heater failure

Water heat

exchanger board DPSW11-1,2

is ON

Replace booster heater unit and safety valve

Set water heat board DPSW11-1,2 to ON

A12 abnormality detection

(Backup heater NG)

Backup heater or

hot water cylinder terminal

has 220-230 V ± 10 %

AC220-230 V±10 %=

(single phase type).

AC380-400 V±10 %=

(3 phase type).

Power is connect

to backup heater or hot water

cylinder terminal

Yes

Restart

Operation starts under 10 ≤ TWI 20 °C

Heater backup operation Heating: Booster heater Hot water supply: Hot water cylinder heater

After 1 hour since heater operation started, neither TWI ≥ 15

°C

nor TTW ≥ 20

°C

is met

Freeze prevention control is detected once

Place electric wire for backup heater Place electric wire for hot water cylinder

Set breaker for backup heater to ON Set breaker for hot water cylinder to ON or check hydro wiring

Backup heater element

is conductive

Yes

Replace hot water cylinder heater

(Hot water cylinder heater NG)

Hot water

cylinder heater element

is conductive

Yes

Replace TWI or TTW sensor

TWI, TTW sensor

characteristics are

normal

Yes

(Refer to hot water cylinder guide)

Replace water heat

exchange control board

(Refer to Characteristic table on page 113)

Page 93

[A13] Pump error

Input appropriate voltage

Yes

Start

Reject the factor

Replace pump

Input voltage is appropriate

The water pump is

locking by some factor

Page 94

[E04] Error

Outdoor unit operates

Yes

Check water heat exchanger

control board

If defective, replace it

Check outdoor control board

If defective, replace it

Yes

Hydro unit

Internal wiring and

connecting wire (1, 2, 3)

are correct

Correct wiring and connecting wire

Yes

CN04 connector

and terminal block (1, 2, 3) wiring

are normal

Correct connector and terminal block wiring

Yes

When power is

on again, D502 (Amber LED)

blinks

Check water heat exchanger board If defective, replace it

Yes

Correct TC sensor connection

Replace TC sensor

TC sensor

connector (CN203) is

connected

Yes

TC sensor

resistance characteristic

is normal

Yes

Start

Replace water heat exchange control board

[F03] Error TC sensor failure

Page 95

[F04] Error TD sensor failure

Correct TD sensor connection

Replace TD sensor

TD sensor

connector (CN603) is

connected

Yes

TD sensor

resistance characteristic

is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

Correct TE sensor connection

Replace TE sensor

TE sensor

connector (CN601) is

connected

Yes

TE sensor

resistance characteristic

is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

Correct TL sensor connection

Replace TL sensor

TL sensor

connector (CN604) is

connected

Yes

TL sensor

resistance characteristic

is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

[F06] Error TE sensor failure

[F07] Error TL sensor failure

Page 96

[F08] Error TO sensor failure

Correct TO sensor connection

Replace TO sensor

TO sensor

connector (CN602) is

connected

Yes

TO sensor

resistance characteristic

is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

Correct TWI sensor connection

Replace TWI sensor

TWI sensor

connector (CN205) is

connected

Yes

TWI sensor

characteristic is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

Correct TWO sensor connection

Replace TWO sensor

TWO sensor

connector (CN205) is

connected

Yes

TWO sensor

characteristic is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

[F10] Error TWI sensor failure

[F11] Error TWO sensor failure

Page 97

[F14] Error TTW sensor failure

Correct TTW sensor connection

Replace TTW sensor

TTW sensor

connector (CN214) is

connected

Yes

TTW sensor

characteristic is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

Correct TFI sensor connection

Replace TFI sensor

TFI sensor

connector (CN213) is

connected

Yes

TFI sensor

characteristic is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

Correct THO sensor connection

Replace THO sensor

THO sensor

connector (CN206) is

connected

Yes

THO sensor

characteristic is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

[F17] Error TFI sensor failure

[F18] Error THO sensor failure

Page 98

[F19] Error THO sensor detach failure

Attach THO sensor to pipe

Replace THO sensor

THO sensor

is attached to pipe

Yes

THO sensor

characteristic is normal

Yes

Replace TWO sensor

TWO sensor

characteristic is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

Page 99

[F20] Error TFI detach failure

Attach TFI sensor to pipe

Replace TFI sensor

TFI sensor

is attached to pipe

Yes

TFI sensor

characteristic is normal

Yes

Replace TWI sensor

TWI sensor

characteristic is normal

Yes

Attach a mixing valve.

Make the mixing valve connection correct.

Make the mixing valve setting correct.

Mixing valve is attached.

Yes

Mixing valve connection

is correct.

Yes

FC_0C: Mixing valve running time

(30sec to 120sec)

Mixing valve setting

is correct.

Yes

Replace TWO sensor

TWO sensor

characteristic is normal

Yes

Start

Replace water heat exchange control board

(Refer to Characteristic table on page 113)

(Refer to wiring diagram of hydro unit on page 20)

Page 100

[F23] Error Low pressure sensor detach failure

Attach low pressure sensor

Replace low pressure sensor

Yes

Low pressure sensor

is detached (CN207, 212)

When operation

is stopped, low pressure sensor

is normal *1

Yes

Start

*1 How to determine: When operation is stopped

Replace water heat exchange control board

(Power on) Handy remote

controller displays "Setting"

"Setting"

disappears

Reboot

(reset)

(Repeat)

(Approx. 3 mins) (Approx. 1 mins)

[F29] Error EEPROM failure

A failure is detected in the IC10 non-volatile memory on the water heat exchanger board during a hot water supply unit operation. Replace the service board.

* If the unit does not have EEPROM inserted when the power is turned on, or if EEPROM data read or write is

unavailable, automatic address mode repeats. In this case, the intensive control unit displays [97 Abnormal].

[F30] Error Enhanced IC failure

Enhanced IC on water heat exchanger control board is abnormal. Replace the water heat exchanger control board to a service board.

[L02] Combination Error

The model name of the outdoor unit is not HWS-P805HR-E or HWS-P1105HR-E. Replace the outdoor unit with the proper model.

[L07] Error

At the time of power on, detecting the above failure automatically activates the automatic address setting mode. (Check code is not output)

Note that if the above failure is detected in the automatic address setting mode, a check code may be output.

Toshiba HWS-P805XWHM3-E, HWS-P805XWHT6-E, HWS-P805XWHT9-E, HWS-P1105XWHT6-E, HWS-P1105XWHT9-E Service Manual

Contents

1 Safety precautions

2 Refrigerant (R410A)

2-1. Safety during installation and service

2-2. Installing refrigerant pipe

2-2-1. Steel pipe and joint

2-2-2. Processing of piping materials

2-3. Tools

2-3-1. Necessary tools

2-4. Recharging of refrigerant

2-5. Brazing of pipes

2-5-1. Materials of brazing

2-5-2. Flux

2-5-3. Brazing

3 Specifications

4-2. Outdoor unit

5 Wiring diagram

5-1. Hydro unit

5-2. Outdoor unit

5-3. Hot water cylinder unit

6 Key electric component rating

6-1. Hydro unit

6-2. Outdoor unit

6-3. Hot water cylinder unit

6-4. Water heat exchange control board

6-5. Outdoor control board

7-2. Refrigeration cycle system diagram

8 Operational description

9 Method of defect diagnosis

9-1. Matters to be confirmed first

9-1-1. Check the power supply voltage

9-1-3. About the installation of the temperature sensor

Non-defective operation (program operation) … No fault code display appears.

9-3-4. How to diagnose by error code

9-4. Diagnosis flow chart for each error code

9-4-1. Hydro unit failure detection