Toshiba HWS-803XWHM3-E-TR, HWS-803XWHT6-E-TR, HWS-803XWHD6-E, HWS-803XWHT9-E, HWS-1403XWHM3-E-TR Service Manual

Model name:

Outdoor Unit

HWS-803H-E(TR)
HWS-1103H-E(TR)
HWS-1403H-E(TR)
HWS-1103H8-E
HWS-1103H8R-E
HWS-1403H8-E
HWS-1403H8R-E
HWS-1603H8-E
HWS-1603H8R-E

AIR TO WATER HEAT PUMP

Hydro Unit

HWS-803XWHM3-E(TR)
HWS-803XWHT6-E(TR)
HWS-803XWHD6-E
HWS-803XWHT9-E
HWS-1403XWHM3-E(TR)
HWS-1403XWHT6-E(TR)
HWS-1403XWHD6-E
HWS-1403XWHT9-E(TR)

Hot Water Cylinder

HWS-1501CSHM3-E(-UK)
HWS-2101CSHM3-E(-UK)
HWS-3001CSHM3-E(-UK)

SERVICE MANUAL

A10-006

1

Contents

1 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 NEW 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4-3.Hot water cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5 Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5-1.Hydro Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5-2.Outdoor Unit (Single phase Type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5-3.Outdoor Unit (3 phase type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5-4.Hot Water Cylinder Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6 Key Electric Component Rating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6-1.Hydro Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6-2.Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6-3.Hot Water Cylinder Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6-4.Water Heat Exchange Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

6-5.Outdoor Control Board (Single phase Type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6-6.Outdoor Unit Control (3 phase type). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

MCC-1596 (Compressor IPDU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

MCC-1597 (Fan Motor IPDU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

MCC-1599 (Interface (CDB)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

MCC-1600 (Noise Filter). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7 Refrigeration Cycle / Water System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7-1.Water System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7-2.Refrigeration Cycle System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2

8 Operational Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9 Method of Defect Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

9-1.Matters to be confirmed first. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

9-1-1.Check the power supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

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

outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

9-1-3.About the installation of the temperature sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

9-2.Non-defective operation (pro gr am op eration) … No fault code display appears.. . . . . . . . . . . . . . 82

9-3.Outline of the determination diagr am . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9-3-1.Procedure of defect diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9-3-2.How to determine from the check code on the remote control . . . . . . . . . . . . . . . . . . . . . 83

9-3-3.How to cancel a check code on the remote controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9-3-4.How to diagnose by error code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

9-4.Diagnosis flow chart for each error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

9-4-1.Hydro unit failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

9-4-2.Outdoor Unit Failure Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

9-4-3.Temperature sensor, temperature-resistance characteristic table . . . . . . . . . . . . . . . . . 122

9-5.Operation check by PC board switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

9-5-1.Operation check mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

9-6.Brief method for checking the key components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

9-6-1.Hydro unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

9-6-2.Outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

10 Hydro unit and Outdoor Unit Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

11 Replacement of the Service P.C. Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

12 How to Exchange Main Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

13 Periodic Inspection Items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

14 Part Exploded View, Part List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

3

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 te xt, and follow the instructions.

[About indication]

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

[About symbols]

Indication Meaning of Indication

DANGER

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

WARNING

Indicates that a wrong operation may cause a serv ice 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.

CAUTION

Indicates that a wrong operation may cause a serv ice 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.

Symbols Meaning of Symbols

Indicates a forbidden action.
Specific forbidden actions are desc ribed 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 230V
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 dischar ge 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 grou nd wire (∗) is connected to the unit ground terminal.

• An unconnected ground 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.

∗: Ground wire of class D grounding

4

<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) othe r than service engin eers away from a failure diagnosis or repairing pl ace.

• 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 additio n,

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.

WARNING

5

<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. Con tact 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 repa ir 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 ground 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.

WARNING

6

2 NEW REFRIGERANT (R410A)

This Air to Water Heat Pump adopts a new 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 too ls 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 refriger ant
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 u nit 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.

7

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 impur ities 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

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 ca n 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

Wall thickness (mm)

Nominal diameter Outer diameter R410A

3/8 9.52 0.80
5/8 15.88 1.00

Nominal diameter

Reference of outer diameter of

copper pipe connected (mm)

Minimum joint wall thickness

(mm)

3/8 9.52 0.80
5/8 15.9 1.00

8

2-2-2. Processing of piping materials

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 airproof 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

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

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

Nominal

diameter

Outer diameter

(mm)

Wall thickness

(mm)

A (mm)

Flare tool for R410A

clutch type

Conventional flare tool

Clutch type Butterfly-nut type

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

Nominal

diameter

Outer diameter

(mm)

Wall thickness

(mm)

Dimension (mm)

Flare nut width

(mm)

ABCD

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

A

D

Figure 2-2-1
Flare dimension

DCB A

45° - 46°

43° - 45°

9

Flare connecting procedure and precautions

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 torq ue 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.

NOTE

When applying oil to the flare surface, be sure to use oil designated by the product. Using a ny 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)

10

2-3. Tools

2-3-1. Necessary tools

In Air to Water Heat Pump using R410A, the service port diameter of packed valve of th e outd oor unit is chan ged
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

* (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.

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

No. Tool to be used Usage

R410A Air to Water Hear Pump

installation

Conventional refrigerant

Air to Water Heat Pump

installation

For R410A

Existence of new

equipment

Conventional

equipment can be

used

New equipment can be

used with conventional

refrigerant

1 Flare tool Pipe flaring Yes *(Note 1) Yes
2

Copper pipe gauge for

adjusting projection margin

Flaring by conventional

flare tool

Yes *(Note 1) *(Note 1)

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

Evacuating, refrigerant
charge, run check, etc.

Yes No No

5 Charge hose
6 Vacuum pump adapter Vacuum evacuating Yes No Yes

7

Electrical balance for

refrigerant charging

Refrigerant charge 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

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 4mm)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

1. Clamp meter 3. Insulation resistance meter

2. Thermometer 4. Electroscope

11

2-4. Recharging of refrigerant

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

NOTE

• 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 co mposition 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

(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 (-76cmHg), 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

Open

Service port

Check valve

Open/close valve
for charging

Electronic balance for refrigerant charging

CloseOpen

Refrigerant cylinder (with siphon)

12

NOTE

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

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

NOTE

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

[Cylinder with siphon]

[Cylinder without siphon]

Gauge manifold

Outdoor unit

Refrigerant
cylinder

Electronic balance

Gauge manifold

Outdoor unit

Refrigerant
cylinder

Electronic balance

Siphon pipe

13

2-5. Brazing of pipes

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 n ot use it fo r
refrigerant piping because its adhesive capacity is low.

NOTE

• 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

Why flux is necessary

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

• Flux prevents the metal surface fr om 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 ra nge makes flux har d
to carbonize.

• It is easy to remove slag after brazing.

• The corrosive actio n 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.

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

NOTE

• 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 flu x, use water that does
not contains chlorine. (e.g. distilled water or ion­exchange water)

• Remove the flux after brazing.

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.

NOTE

• 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.

Piping material

Brazing metal to be

used

Flux to be used

Copper - Copper Phosphor copper Do not use

Copper - Iron Silver Paste flux

Iron - Iron Silver Vapour flux

14

5) Use the reducing valve to adjust the nitrogen
gas flow speed to 0.05 m

3

/hour or 0.02 MPa

(0.2 kgf/cm

2

).

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

M

Flow meter

Stop valve

From nitrogen cylinder

Nitrogen gas

Robber plug

Pipe

Nitrogen gas cylinder

15

3 Specifications

*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 c onditions: outside air temperature 35 °C, water supply temperature 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 The outdoor unit operating noise is measured at the point of 1m away from the unit back surface centre and 1m high from the ground. The hydro unit operating noi se is measured at the

point of 1m away from the unit front surface centre.

The value of the operating noise varies depending on room structure where the unit is installed.
*5 Do not leave the hydro unit at 5 °C or below.
*6 Check the water piping for leakage under t he maximum operating pressure.

Unit name Hydro unit HWS-803XWHM3-E, 803XWHT6-E, 803XWHD6-E, 803XWHT9-E

Outdoor unit HWS-803H-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 50Hz 220 - 230V
Operation mode Heating Cooling
Electric characteristic *1 *2 Hydro unit Current (A) 0.98 0.46

Power (kW) 0.101 0.097
Power factor (%) 91.5 91.7

Outdoor unit Current (A) 7.64 8.90

Power (kW) 1.719 2.033
Power factor (%) 97.8 99.3

Total Starting current (A) 8.62 9.36
Operating noise *1 *2 *4 Hydro unit (dB(A)) 29 29

Outdoor unit (dB(A)) 49 49
Coefficient of performance *1 *2 4.40 2.82
Hydro unit Outer dimension Height (mm) 925

Width (mm) 525

Depth (mm) 355
Net weight (kg) 50
Color Silky shade (Munsell 1Y8.5/0.5)
Remote controller

Outer dimension *3

Height (mm) 120

Width (mm) 120

Depth (mm) 16
Circulating pump Motor output (W) 125 (MAX)

Flow rate (L/min) 22.9 17.2

Type Non-self-suction centrifugal pump
Heat exchanger Plate-type heat exchange

Outdoor unit Outer dimension Height (mm) 890

Width (mm) 900

Depth (mm) 320
Net weight (kg) 63
Color Silky shade (Munsell 1Y8.5/0.5)
Compressor Motor output (W) 1400

Type Twin rotary type with DC-inverter varia ble speed control

Model DA220A2F-22L
Fan motor Standar d air capacity (m

3

/min) 50.0

Motor output (W) 60

Refrigerant piping Connection method Flare connection

Hydro unit Liquid Ø9.52

Gas Ø15.9
Outdoor unit Liquid Ø9.52

Gas Ø15.9
Maximum length (m) 30
Maximum chargeless length (m) 30
Maximum height difference (m) ±30
Minimum length (m) 5

Refrigerant Refrigerant name R410A

Charge amount (kg) 1.8

Water piping Pipe diameter R1 1/4

Maximum length (m) No ne (Need the flow rate 13 /min or more)
Maximum height difference (m) ±7
Maximum working water pressure (kPa) 300

Operating temperature range Hydro unit (°C) 5-32

Outdoor unit (°C) -20-43

Operating humidity range Hydro unit (%) 15-85

Outdoor unit (%) 15-100

Wiring connection Power wiring 3 wires: including ground line (Outdoor unit)

Connecting line 4 wires: including ground line

16

*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 c onditions: outside air temperature 35 °C, water supply temperature 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 The outdoor unit operating noise is measured at the point of 1m away from the unit back surface centre and 1m high from the ground. The hydro unit operating noise is measured at the

point of 1m away from the unit front surface centre.

The value of the operating noise varies depending on room structure where the unit is installed.
*5 Do not leave the hydro unit at 5 °C or below.
*6 Check the water piping for leakage under the maximum operating pressure.

Unit name Hydro unit HWS-1403XWHM3-E, 1403XWHT6-E, 1403XWHD6-E, 1403XWHT9-E

Outdoor unit HWS-1103H-E HWS-1403H-E
Heating capacity *1 (kW) 11.2 14.0
Cooling capacity *2 (kW) 10.0 11.0
Variable range of compressor frequency 10 - 60Hz 10 - 70 Hz
Power source Single phase 50Hz 220 - 230V
Operation mode Heating Cooling Heating Cooling
Electric characteristic *1 *2 Hydro unit Current (A) 0.63 0.61 0.67 0.63

Power (kW) 0.135 0.130 0.145 0 .135
Power factor (%) 93.2 92.7 94.0 93.2

Outdoor unit Current (A) 9.94 14.88 13.37 17.47

Power (kW) 2.2153.392.9653.945
Power factor (%) 96.9 99.1 96.4 98.1

Total Starting current (A) 10.57 15.49 14.04 18.10
Operating noise *1 *2 *4 Hydro unit (dB(A)) 29 29 29 29

Outdoor unit (dB(A)) 49495151
Coefficient of performance *1 *2 4.77 2.84 4.50 2.70
Hydro unit Outer dimension Height (mm) 925

Width (mm) 525

Depth (mm) 355
Net weight (kg) 54
Color Silky shade (Munsell 1Y8.5/0.5)
Remote controller

Outer dimension *3

Height (mm) 120

Width (mm) 120

Depth (mm) 16
Circulating pump Motor output (W) 190 (MAX)

Flow rate (L/min) 32.1 28.9 40.1 31.5

Type Non-self-suction centrifugal pump
Heat exchanger Plate-type heat exchange

Outdoor unit Outer dimension Height (mm) 1340

Width (mm) 900

Depth (mm) 320
Net weight (kg) 93
Color Silky shade (Munsell 1Y8.5/0.5)
Compressor Motor output (W) 2500

Type Twin rotary type with DC-inverter varia ble speed control

Model DA422A3F-25M
Fan motor Standard air capacity (m

3

/min) 103.0

Motor output (W) 100 × 2

Refrigerant piping Connection method Flare connecti on

Hydro unit Liquid Ø9.52

Gas Ø15.9
Outdoor unit Liquid Ø9.52

Gas Ø15.9
Maximum length (m) 30
Maximum chargeless length (m) 30
Maximum height difference (m) ±30
Minimum length (m) 5

Refrigerant Refrigerant name R410A

Charge amount (kg) 2.7

Water piping Pipe diameter R1 1/4

Maximum length (m) None (Need the flow rate 17.5 /min or more)
Maximum height difference (m) ±7
Maximum working water pressure (kPa) 300

Operating temperature range Hydro unit (°C) 5-32

Outdoor unit (°C) -20-43

Operating humidity range Hydro u nit (%) 15-85

Outdoor unit (%) 15-100

Wiring connection Power wiring 3 wires: including ground line (Outdoor unit)

Connecting line 4 wires: including ground line

17

*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 c onditions: outside air temperature 35 °C, water supply temperature 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 The outdoor unit operating noise is measured at the point of 1m away from the unit back surface centre and 1m high from the ground. The hydro unit operating noi se is measured at the

point of 1m away from the unit front surface centre.

The value of the operating noise varies depending on room structure where the unit is installed.
*5 Do not leave the hydro unit at 5 °C or below.
*6 Check the water piping for leakage under t he maximum operating pressure.

Unit name Hydro unit HWS-1403XWHM3-E, 1403XWHT6-E, 1403XWHD6-E, 1403XWHT9-E

Outdoor unit HWS-1103H8(R)-E HWS-1403H8(R)-E HWS-1603H8(R)-E
Heating capacity *1 (kW) 11.2 14.0 16.0
Cooling capacity *2 (kW) 10.0 11.0 13.0
Variable range of compressor frequency 10 - 60Hz 10 - 60 Hz 10 - 70 Hz
Power source 3 phase 50Hz 380 - 400V
Operation mode Heating Cooling Heating Cooling Heating Cooling
Electric characteristic *1 *2 Hydro unit Current (A) 0.63 0.61 0.67 0.63 0.69 0.66

Power (kW) 0.135 0.130 0.145 0.135 0.150 0.140
Power factor (%) 93.2 92.7 94.0 93.2 94.5 92.3

Outdoor unit Current (A) 4.03 5.65 5.23 6.50 5.95 7.50

Power (kW) 2.255 3.39 3.065 3.945 3.570 4.660
Power factor (%) 81.187.084.988.087.090.0

Total Starting current (A) 4.66 6.26 6.06 7.13 4.26 8.16
Operating noise *1 *2 *4 Hydro unit (dB(A)) 29 29 29 29 29 29

Outdoor unit (dB(A)) 495051515252
Coefficient of performance *1 *2 4.69 2.84 4.36 2.70 4.30 2.71
Hydro unit Outer dimension Height (mm) 925

Width (mm) 525

Depth (mm) 355
Net weight (kg) 54
Color Silky shade (Munsell 1Y8.5/0.5)
Remote controller

Outer dimension *3

Height (mm) 120

Width (mm) 120

Depth (mm) 16
Circulating pump Motor output (W) 190 (MAX)

Flow rate (L/min) 32.128.940.131.545.837.3

Type Non-self-suction centrifugal pump
Heat exchanger Plate-type he at exchange

Outdoor unit Outer dimension Height (mm) 1340

Width (mm) 900

Depth (mm) 320
Net weight (kg) 93
Color Silky shade (Munsell 1Y8.5/0.5)
Compressor Motor output (W) 2500

Type Twin rotary type with DC-inverter variable speed control

Model DA422A3F-27M
Fan motor Standar d air capacity (m

3

/min) 103.0

Motor output (W) 100 × 2

Refrigerant piping Connection method Flare connection

Hydro unit Liquid Ø9.52

Gas Ø15.9
Outdoor unit Liquid Ø9.52

Gas Ø15.9
Maximum length (m) 30
Maximum chargeless length (m) 30
Maximum height difference (m) ±30
Minimum length (m) 5

Refrigerant Refrigerant name R410A

Charge amount (kg) 2.7

Water piping Pipe diameter R1 1/4

Maximum length (m) None (Need the flow rate 17.5 /min or more)
Maximum height difference (m) ±7
Maximum working water pressure (kPa) 300

Operating temperature range Hydro unit (°C) 5-32

Outdoor unit (°C) -20-43

Operating humidity range Hydro unit (%) 15-85

Outdoor unit (%) 15-100

Wiring connection Power wiring 5 wires: including ground line (Outdoor unit)

Connecting line 4 wires: including ground line

18

4 Outside Drawing

4-1. Hydro unit

HWS-803XWHM3-E, 803XWHT6-E, 803XWHD6-E, 803XWHT9-E
HWS-1403XWHM3-E, 1403XWHT6-E, 1403XWHD6-E, 1403XWHT9-E

960

Anchor bolt long hole pitch

B leg part

40

380

40

2020

72.5 72.5

2-dia.12x17 long hole
(for dia.8-10 anchor bolt)

2-dia.12x17 U-shape hole
(for dia.8-10 anchor bolt)

A leg part

Remote controler

135.5

158

186.5

59.5144.5

11619.5

352

37.5

92554

Hot water outlet
connecting pipe 1 1/4"

Water inlet

connecting pipe 1 1/4"

Gas line dia.15.88
Liquid line dia.9.52

309.5

259

Drain nipple

371.5
355

40.540.5

9

Anchor bolt

long hole pitch

Manometer

525

19.5

19

4-2. Outdoor unit

HWS-803H-E

Portion B

Drain hole ( 25 burring hole)

Portion A

Air outlet

900

Air inlet

Air inlet

5-Drain hole ( 20 88 burring hole)

( 12 17 long hole)

Mounting bolt hole

Details of portion A

Details of portion B

Mounting bolt hole

( 12 17 U-shape hole)

Name Description

Refrigerant piping outlet

Indoor and outdoor

connecting line outlet

Power source intake hole 38 knockout hole

( 9.5 flare)

Refrigerant liquid

connection

Refrigerant gas

connection

( 15.9 flare)

Optional mounting hole

(12- 3 embossed)

Knockout for lower part of piping

Z arrow view

17.5

150

600

550

52

383

365

74

128

118

17.5

60

200

380

75

46

48

54

34

170

40

96

30

39

40

320

12

890

55

94

24

55

95

95

64

18

80

151

400

12

255

155

95

55

247

18

80

178

135

518

327

178

178

68

60

148

165

581

534

7

65

83

7

20

HWS-1103H-E, 1403H-E, 1103H8(R)-E, 1403H8(R)-E, 1603H8(R)-E

Portion B

96

39

48

54

600

Portion A

70

34

75

46

170

60

380

200

17.5

128

Air inlet

118
74

383

Air outlet

150

17.5 365

Mounting bolt hole

Power source intake hole

Mounting bolt hole

Details of portion A

40

40

Details of portion B

12

2

1

Description

38 knockout hole

Name

65

83

Knockout for lower part of piping

Z arrow view

Z

Refrigerant gas connection

Refrigerant liquid connection

1

2

1

2

9555

12

64

1

1340

320

30

55

95

94

18

80

151

400

24

55

95

1880

135

155

613
605

900

70 581 74 581

178 178 178

518

52 550

360 655

327

Optional mounting hole

(24- 3 embossed)

60

68

53412153485

7

7

Drain hole ( 25 burring hole)

5-Drain hole ( 20 88 burring hole)

Air inlet

( 12 17 long hole)

( 12 17 U-shape hole)

Refrigerant piping outlet

Indoor and outdoor

connecting line outlet

( 9.5 flare)

( 15.9 flare)

21

4-3. Hot water cylinder

550

5952066.6

2040

550

5951114

1090

5951497.6

1474

550

Specification

for UK only

Specification

for UK only

Specification

for UK only

HWS-3001CSHM3-E(-UK)

HWS-2101CSHM3-E(-UK)

HWS-1501CSHM3-E(-UK)

22

5 Wiring Diagram

5-1. Hydro Unit

Remote

controller

(HWS-AMS11E)

AB

GRY

WHI

AB

Remote

controller

(HWS-AMS11E)

*Option

TB 07

GRY

WHI

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

1

3

2

1

34

22

2

111

3

2

1

1

2

2

3

1

1

3

1

2

1

2

1

2

1

2

1

1

2

3

3

2

1

3

2

1

3

1

2

1

2

*Option

THOTWOTWITC

LPS

RED

RED

BRW

BRW

RED

WHI

BLK

TFI

TTW

TB 06

CN208

(BLU)

CN213
(WHI)

CN214

(WHI)

CN206

(WHI)

CN205

(RED)

CN204
(BRW)

CN203

(YEL)

CN41
(BLU)

CN501

(YEL)

CN207

(BLU)

CN212
(WHI)

CN102

(WHI)

CN101

(WHI)

CN202

(YEL)

CN201

(WHI)

CN200
(RED)

CN211

(BLK)

CN210
(RED)

CN209
(GRN)

RY607

RY606RY605

RY604

RY601RY600RY603 RY602

CN601

(RED)

CN603

(YEL)

CN602

(WHI)

WHI

YEL

WHI

RED

RED

BRW

BLU

WPM

BLK

RY
05

A1

A2

LNNL

P.C.board

(MCC-1511)

SW10 SW 11 SW12 SW13

SW06

SW07

SW14

SW01
SW02

12 43

ON

ON

1234 1234 123 41234

ON

ON21ON

ON

OFF

ON

3

5

7

1

313

1

313

1

5

7

1

TB 04

MIXV

TB 04

TB 05

RED

RED

ORN

PNK

WHI

WHI

YEL

RED

ORN

WHI

PNK

WHI WHI

YEL

BLU

BRW

WHI

RED

WHI

YEL

BH 3WV

2WV

WPM

TB 05

5251

5

3

5

4

56

55

5

7

59

5

8

42

41

4

3

44

4

4

43

42

41

MIXV

59

5

8

57

3WV

RED

PNK

ORN

468

2

7

5

RY

06

A1

A2

6

487

A2

A1

4

6

RY

01

WHI WHI

RY
02

RY04RY

03

*

1

*

1

HWS-803XWHT6-E : Installed
HWS-1403XWHT6-E : Installed
HWS-803XWHD6-E : Installed
HWS-1403XWHD6-E : Installed
HWS-803XWHT9-E : Installed
HWS-1403XWHT9-E : Installed
HWS-803XWHM3-E : Not installed
HWS-1403XWHM3-E : Not installed

*

1

HWS-803XWHT6TR : Installed
HWS-1403XWHT6TR : Installed
HWS-1403XWHT9TR : Installed
HWS-803XWHM3TR : Not installed
HWS-1403XWHM3TR : Not installed

RED

WHI

GRY

RED

WHI

BLK

YEL

WHI

ORN

WHI

PNK

CN604

(BLU)

CN605

(YEL)

CN606

(BLU)

CN305

(GRN)

CN100

(WHI)

3

1

3

1

7

7

5
5

3

1
1

3

1

3

1

3

1

3
33

3

1

1

5

F100
Fuse
T5A
250V~

WHI
WHI

P100

BLK

ORN

ORN

RED

RED

BRW

BRW

BLK

BLK

RED

YEL
GRN

BLK
BLK

11

1
2
3
4
5
6

1

11

11

4
5
6

2
3

1
2
3
414

2
3

1
2
3
414

2
3

1
2
3
414

2
3

1
2
3
414

2
3

1
2
3
414

2
3

1
2
3
414

2
3

1
2
3
414

2
3

1
2
3
414

2
3

33

323

1

1

11

3

3

22

2
33

1

2

2

2

1

Transformer

3
1

2

3
1

2

4
3

1

2

4
3

1

2

GRN
GRN

GRN

GRN

GRN

GRN

GRN

GRN

YEL

YEL

YEL

YEL

YEL

YEL

YEL

YEL

*Option p.c.board

Emergency stop I/P

Cooling thermostat I/P
Heating thermostat I/P

Compressor operation
O/P

Defrost O/P

Boiler control O/P
Alerm O/P

7

8

RY

01

Flow switch

Pressure switch

4.15MPa

Thermal protector
(auto)

75 5

PJ20

TB1

K1
K2

K1
K2

PJ20

TB1

PJ17

TB1

PJ17

TB1

Photocoupler input
p.c.board

(MCC-1214)

Relay
p.c.board
(MCC-1217)

Relay
p.c.board
(MCC-1217)

Photocoupler input
p.c.board

(MCC-1214)

WHI

RED

GRY
TB 01

Outdoor unit

3

3

12

12111

3

4
2

6
5

1

5
4
3
2

2

2

1

55

11

4
3

3

4

RED
BLU

GRN

ORN
BRW

CN02
(WHI)

Relay

p.c.board

(MCC-1431)

F01 (5A)

CN01
(WHI)

3
11

2

3

2

11

3

4

55

6

9
787

9

RED

WHI

WHI

BLU

BRW

YEL

CN10
(WHI)

RY
10

CR10
CR11
CR12
CR13

RY
11

RY
12

RY
13

1

6

D

6

C

6

B

6

A

AB

7

B

7

A

Type 1

(3-wire SPDT type)

Type 1

(2-wire spring return)

Type 2

(3-wire SPST type)

Type 2

(3-wire SPST type)

Type 3

(3-wire SPDT type)

2

4

3

2

3

4

2

4

3

2

1

3

4

*See DIP SW13_1

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

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

2.

, and indicates the terminal
board and the numberals ndicate the
terminal numbers.

3.

indicates P.C. board.

* Be sure to fix the electric

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

Symbol

WPM Water pump motor

2WV 2-way valve (local)

Booster heater
Relay01~Relay06

BH
RY01~RY06

TWI

THO

TWO

TC

TTW
TFI

Parts name

3WV

3-way valve (local)

MIXV Mixing valve (local)

LPS

Low pressure sensor
Heater AC230V, 3kWBackup heater1, 2, 3

Water heat exchanger temperature sensor
Water heat exchanger inlet temperature sensor

Terminal block

Parts nameSymbol

TB

Floor heating inlet temperature sensor

Hot water cylinder temperature sensor

Water heat exchanger outlet temperature sensor
Backup heater outlet temperature sensor

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

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

Color identification

33

12

N

L

12

TB 03

Power supply
220 - 230V~ 50Hz

Hot water cylinder

*Option

BRW

BLU

BRW

BLU

BRW

BLU

YEL/GRN

F1 F2

F1, F2
Fuse
AC250V
T30A

RY05

2T1

1L1

4T2

3L2

95 5

95 5

2T1

1L1

4T2

3L2

6T3

5L3

6T3

2T1

4T2

1

L12L3

5L3

F3~8
Fuse
AC250V
T30A

RY02

F3F4F6F5F8

F7

BLU

GRY

GRY

BLU

BLU

BLU

BRW

BLU

BRW

BLU

BLK

BLK

TB 02

L1L2

L3

N

Power supply

380 - 400V 3N~ 50Hz

HWS-803XWHT9-E
HWS-1403XWHT9-E
HWS-1403XWHT9TR

RY04

Backup heater 2

Backup heater 1

Backup heater 3

Thermal protector
(Single operation)

Thermal protector
(Single operation)

(Single operation)95 5

Thermal protector

95 5

95 5

F3~6
Fuse
AC250V
T30A

BRW

BLU

BRW

BLU

BLU

BLK

BLK

BLU

RY02

6T3

5L3

4T22T1 6T3

3L51L12L3

1L1 3L2

2T1 4T2

RY04

F3 F6

F5

F4

TB 02

Power supply

380 - 400V 3N~ 50Hz

1L2

L

L3

N

HWS-803XWHT6-E
HWS-1403XWHT6-E
HWS-803XWHT6TR
HWS-1403XWHT6TR

Thermal protector
(Single operation)

(Single operation)

Thermal protector

Backup heater 1

Backup heater 2

95 5

95 5

F3~6
Fuse
AC250V
T30A

BRW

BLU

BRW

BLU

BLU

BLK

BLK

BLU

RY02

6T3

5L3

4T22T1 6T3

3L51L12L3

1L1 3L2

2T1 4T2

RY04

F3 F6

F5

F4

TB 02

Power supply

220 - 230V 3~ 50Hz

1L2

L

L3

HWS-803XWHD6-E
HWS-1403XWHD6-E

Thermal protector
(Single operation)

(Single operation)

Thermal protector

Backup heater 1

Backup heater 2

95 5

F3,F4
Fuse
AC250V
T30A

RY02

6T32T1 4T2

5L31L1 3L2

Thermal protector
(Single operation)

Backup heater 1

F4

F3

BRW

BLU

BRW

BLU

LN

TB 02

Power supply

220 - 230V~ 50Hz

HWS-803XWHM3-E
HWS-1403XWHM3-E
HWS-803XWHM3TR
HWS-1403XWHM3TR

WARNING

Perform the grounding from the
earth terminal in the terminal
block of the outdoor unit.

CAUTION

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

23

5-2. Outdoor Unit (Single phase Type)

HWS-803H-E, HWS-1103H-E, HWS-1403H-E

Control board

(Blue)

(

White)

HMS-1103,

1403H-E only

(White)

(

White)

Upper

(White)

Operating

power

4-way

valve

coil

Reactor

220-230V

50Hz

4F

20SF

Earth screw

Earth screw

Earth

screw

Hydro unit

Outdoor unit

Power supply

single phase

(Yellow)

(

White)

(

White)

(

Yellow)

(

White)

(White)(White)(White)

(

White)

WR B

WhiteRed

G

RWB

External

input

Symbol Item name

Compressor

Fan motor

Pulse motor valve coil

Discharge temperature sonsor

Suction temperature sensor

Heat exchange sensor 1

Heat exchange sensor 2

Outdoor temperature sensor

Linetilter

4-way valve coil

Compressor case thermostat

Fuse 25 A, 250 VAC

Fuse 10A, 250 VAC

1. indicates a terminal plate. The number inside indicates the terminal number.

2. The double-dashed line indicates a local wiring while the dashed line indicates

an optional accessory or service wiring.

3. indicates a printed board.

4. For the hydro unit circuit, see the hydro unit wiring diagram.

24

5-3. Outdoor Unit (3 phase type)

HWS-1103H8(R)-E, -1403H8(R)-E, -1603H8(R)-E

P.C. board
MCC-1596

P.C. board
MCC-1597

Hydro
unit

indicates the teminal block. Alphanumeric characters
in the cycle indicate terminal No.
The two-dot chain line indicates the wiring procured locally.
indicates the P.C. board.
For the hydro unit circuit, refer to the wiring diagram of
the indoor unit.

(1103H8R-E
1403H8R-E
1603H8R-E)
only

25

5-4. Hot Water Cylinder Unit

12

TB03(230V)

AB

TB06(TTW)

Supply 220 - 230 V from hydro unit
Cable size 1.5 mm2 (minimum)

To hydro unit

Green /
Yellow

Blue

Double pole thermal cut out

Blue

Brown

Brown

TTW sensor

Hot water cylinder heater

26

6 Key Electric Component Rating

6-1. Hydro Unit

HWS-803XWHM3-E, T6-E, D6-E, T9-E

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

No. Component name

Model name

Type name Rating

M3-E T6-E D6-E T9-E

1

Circulating pump

OOOO

UPS025-65 K 130 AC230 V 0.54 A (MAX)

2

Backup heater 6 kW

OOO –

AC 400 V (3N) 6 kW (AC230 V 3 kW
compatible)

3

Backup heater 9 kW

O–

AC400V (3N) 9 kW

4

Water heat exchange
temperature sensor
(TC sensor)

OOOO –

10 kΩ (25°C)

5

Water inlet temperature sensor
(TWI sensor)

OOOO –

10 kΩ (25°C)

6

Water outlet temperature sensor
(TWO sensor)

OOOO –

10 kΩ (25°C)

7

Heater outlet water temperature
sensor
(THO sensor)

OOOO –

10 kΩ (25°C)

8

Floor inlet temperature sensor
(TFI sensor)

OOOO –

10 kΩ (25°C)

9

Pressure switch

OOOO –

Operating pressure 4.15 MPa +0 -0.3
MPa

10

Low pressure sensor

OOOO –

Operating pressure 0.20 M Pa

11

Bimetal thermostat (auto)

OOOO –

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

12

Bimetal thermostat (single
operation)

OOOO –

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

13

Flow switch

OOOO –

Operating flowing quantity 13 /min

14

Output board (OP)

OP OP OP OP

TCB-PCIN3E AC230 V 0.5 A DC24 V 1 A

15

Input board (OP)

OP OP OP OP

TCB-PCM03E Contact input

16

Remote control (Main)

OOOO

HWS-AMS11E

17

Remote control (Sub)

OP OP OP OP

HWS-AMS11E

18

Water 3-way valve terminal

OOOO –

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

19

Water 2-way valve terminal

OOOO –

AC230 V 0.1 A 2Wire type mountable

20

Mixing valve terminal

OOOO –

AC230 V 0.1 A
3Wire SPST, SPDT type mountable

21

Circulating pump terminal

OOOO –

AC230 V 1.0 A

22

Booster heater terminal

OOOO –

AC230 V 1.0 A

23

Fuse

OOOO –

AC 250 V 30 A

27

HWS-1403XWHM3-E, T6-E, D6-E, T9-E

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

No. Component name

Model name

Type name Rating

M3-E T6-E D6-E T9-E

1

Circulating pump

OOOO

UPS25-80 130 AC230 V 0.83 A (MAX)

2

Backup heater 6 kW

OOO –

AC 400 V (3N) 6 kW (AC230 V 3kW
compatible)

3

Backup heater 9 kW

O–

AC 400 V (3N) 9 kW

4

Water heat exchange
temperature sensor
(TC sensor)

OOOO –

10 kΩ (25°C)

5

Water inlet temperature sensor
(TWI sensor)

OOOO –

10 kΩ (25°C)

6

Water outlet temperature sensor
(TWO sensor)

OOOO –

10 kΩ (25°C)

7

Heater outlet water temperature
sensor
(THO sensor)

OOOO –

10 kΩ (25°C)

8

Floor inlet temperature sensor
(TFI sensor)

OOOO –

10 kΩ (25°C)

9

Pressure switch

OOOO –

Operating pressure 4.15 MPa +0 -0.3
MPa

10

Low pressure sensor

OOOO –

Operating pressure 0.20 M Pa

11

Thermal protector (auto)

OOOO –

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

12

Thermal protector (single
operation)

OOOO –

Operating temperature 95±5°C AC250
V 16 A

13

Flow switch

OOOO –

Operating flowing quantity 17.5 L/min

14

Output board (OP)

OP OP OP OP

TCB-PCIN3E AC230 V 0.5 A DC24 V 1 A

15

Input board (OP)

OP OP OP OP

TCB-PCM03E Contact input

16

Remote control (Main)

OOOO

HWS-AMS11E

17

Remote control (Sub)

OP OP OP OP

HWS-AMS11E

18

Water 3-way valve terminal

OOOO –

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

19

Water 2-way valve terminal

OOOO –

AC230 V 0.1 A 2Wire type mountable

20

Mixing valve terminal

OOOO –

AC230 V 0.1 A
3Wire SPST, SPDT type mountable

21

Circulating pump terminal

OOOO –

AC230 V 1.0 A

22

Booster heater terminal

OOOO –

AC230 V 1.0 A

23

Fuse

OOOO –

AC 250 V 30 A

28

6-2. Outdoor Unit

HWS-803H-E

No. Component name Type name Rating

1

Compressor DA220A2F-22L

2

Outdoor fan motor ICF-280-A60-1 Output 60 W

3

4-way valve coil VHV-01AP552B1 AC220 - 230 full-wave rectifier input, alive time

10 sec or less

4

Pulse motor valve (PMV) coil CAM-MD12TF-15 DC12 V

5

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

6

Reactor CH-56 5.8 mH, 18.5 A

7

PC board MCC-1571 Input 1Ø, AC220 - 230 V ± 10 %,

50/60 Hz

29

HWS-1103H-E, 1403H-E

No. Component name Type name Rating

1

Compressor DA422A3F-25M

2

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

3

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

4

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

5

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

6

Board MCC-1560 Input 3Ø, AC230 V±23 V, 50/60 Hz

7

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

8

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

30

HWS-1103H8(R)-E, 1403H8(R)-E, 1603H8(R)-E

No. Component name Type name Rating

1

Compressor DA422A3F-27M

2

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

3

Reactor CH-78 4.2 mH, 16 A

4

Reactor CH-68 18 mH, 5 A

5

4-way valve coil STF-01A5502E1 AC220 - 230 V

6

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

7

PC board (Compressor) MCC-1596

8

PC board (Fan motor drive) MCC-1597

9

PC board (Control) MCC-1599

10

PC board (Noise filter) MCC-1600

11

High pressure switch ACB-4UB83W OFF = 4.15 +0, -0.3 Mpa

12

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

13

Relay EL200/240 A2-F() Contact = AC480V, 20 A

31

6-3. Hot Water Cylinder Unit

O·········Applied

No. Component name

Model name

Type name Rating

1501

CSH
M3-E
(-UK)

2101

CSH
M3-E
(-UK)

3001

CSH
M3-E
(-UK)

1

Hot water cylinder heater

OOO

– AC230 V 2.75 KW

2

Hot water cylinder temperature
sensor
(TTW sensor)

OOO

–

10 kΩ (25°C)

3

Thermal cut-out

OOO

–

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

32

6-4. Water Heat Exchange Control Board

HWS-803XWHM3-E, 803XWHT6-E, 803XWHD6-E, 803XWHT9-E
HWS-1403XWHM3-E, 1403XWHT6-E, 1403XWHD6-E, 1403XWHT9-E

Relay board connector
CN501

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

Pressure switch connector
CN201
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 control

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 pump

connector

CN603

Option board

connector

CN208-CN211

33

6-5. Outdoor Control Board (Single phase Type)

HWS-803H-E

Electrolytic capacitors

Reactor connection connecto

r

Compressor output terminals

CN202
CN201
CN200

Fan motor output
CN300 (White)

Case thermostat connector

CN609(Blue)

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

Temperature sensor connectors

TL CN604(

White

)

TD CN603(

White

)

TO CN602(

Yellow

)

TE CN601(

White

)

TS CN600(

White

)

Alive, error display LEDs

D800 804(

Yellow

)

D805(

Green

)

PMV connector

CN710 (White)

Initialization switch

SW802

Power circuit protection
fuse
F01 (250V, 25A)

Connecting cable connector

CN04(White)

Connecting cable protection fuse

F03 (250 V, 10 A)

Earth lead wire

P09 (Black)

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

Hydro-outdoor communication signal LEDs

D503 (Green, Outdoor => Hydro)

D502 (Amber, Hydro => Outdoor)

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

Power circuit protection

fuse

F100 (250 V, 3.15 A,

plastic case)

34

HWS-1103H-E, 1403H-E

Fan motor output (Upper)
CN400(White)

Fan motor output (Lower)
CN300(White)

Case thermostat connector
CN609(Blue)

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

4-way valve connector
CN701(White)

Compressor ON output
connector
CN704(Blue)

Heator output
connector
CN703(Grey)

External input connector
CN610(Yellow)

Special operation switches
SW801
SW804

Display change-over
switches
SW800
SW803

PMV connector
CN710(White)

Initialization switch
SW802

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

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

Earth lead wire
P09(Black)

Connecting cable connector
CN04(White)

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

Electrolytic capacitors

Compressor output terminals
CN202
CN201
CN200

Power supply connection
lead wires
P01(Red)
P02(White)
P03(Black)

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)

35

6-6. Outdoor Unit Control (3 phase type)

HWS-1103H8(R)-E, 1403H8(R)-E, 1603H8(R)-E
MCC-1596 (Compressor IPDU)

CN851

(Red)

Connector for MCC-1597 (CN505)

CN101

(White)

Connector for MCC-1597 (CN502)

CN13

(Black)

Terminal for power relay

F02

Electric circuit protective fuse
(500V, 31.5A)

CN12

(White)

Terminal for MCC-1600 (CN17)

F01

Electric circuit protective fuse
(500V, 31.5A)

CN11

(Red)

Terminal for power relay

CN04

(Red)

Terminal for PTC thermistor

CN19

(Yellow)

, CN20

(Yellow)

Terminal for reactor CH78

CN211

(Red)

, CN212

(White)

, CN213

(Black)

Compressor output terminal

36

MCC-1597 (Fan Motor IPDU)

CN750

(White)

Fan motor output (Upper side)

CN504

(Blue)

Connector for MCC-1599
(CN802)

CN602

(Black)

Connector for MCC-1600 (CN51)

F500

Electric circuit protective fuse
(250V, 15A)

P501

(Black)

Lead wire for grounding

CN505

(Red)

Connector for MCC-1596 (CN851)

CN502

(White)

Connector for MCC-1596 (CN101)

CN700

(Blue)

Fan motor output (Lower side)

CN500

(Red)

Connector for MCC-1600 (CN23)
and reactor CH68

37

MCC-1599 (Interface (CDB))

CN700 (Yellow)

4-way valve connector

F01

Power supply protective fuse
(250V, 3.15A)

CN690 (Green)

High-pressure
switch connector

CN609 (Blue)

Case thermostat connector

CN710 (White)

PMV1 Connector

CN704 (Blue)

Compressor ON

CN703 (Gray)

Heater output
connector

out put connector

CN610 (Yellow)

Outside input connector

CN01 (White)

Inter-unit cable connector

CN02 (Red)

Connector for
MCC-1600 (CN10 and CN19)

CN802 (White)

Connector for MCC-1597 (CN504)

CN708 (Blue)

Connector for power relay coil

CN608 (White)

Connector for MCC-1600 (CN50)

Temp.sensor connector

CN603 (White) TD sensor
CN602 (Yellow) TO sensor

CN604 (White) TL sensor

CN601 (White) TE sensor
CN600 (White) TS sensor

Specific operation switch

SW801
SW804
SW805
SW806

Display select switch

SW800
SW803

Initial setting switch

SW802

Power-ON,error display LED

D800 to D804 (Yellow)

D805 (Green)

Hydro/Outdoor communication
signal LED

D503 (Green), (Outdoor Hydro)

D502 (Orange), (Hydro Outdoor)

→

→

38

MCC-1600 (Noise Filter)

CN51

(Black)

C

onnector for

MCC-1597 (CN602)

CN50

(White)

C

onnector for

MCC-1599 (CN608)

CN05

(Red)

P

ower supply terminal (L1)

F01

V

aristor protective fuse

(250V, 6.3A)

CN06

(White)

P

ower supply terminal (L2)

F02

V

aristor protective fuse

(250V, 6.3A)

CN07

(Black)

P

ower supply terminal (L3)

F03

V

aristor protective fuse

(250V, 6.3A)

CN20

(White)

P

ower supply terminal (L2)

CN08

(Gray)

N

eutral terminal

CN10

(Red)

T

erminal for MCC-1599 (CN02) and Terminal for PTC thermistor

CN16

(Red)

T

erminal for power relay

CN17

(White)

T

erminal for

MCC-1596 (CN02)

CN18

(Black)

T

erminal for

power relay

CN19

(Gray)

T

erminal for

MCC-1599 (CN02)

CN09

(Brown)

T

erminal for

grounding

CN23

(Red)

C

onnector for

MCC-1597 (CN500)

39

7 Refrigeration Cycle / Water System Diagram

7-1. Water System Diagram

M

M

Fan coil unit

Radiator unit

Floor

heating

By-pass valve

(locally procured)

By-pass valve

(locally procured)

Moterized mixing valve

(locally procured)

AC230V

Buffer tank(locally procured)

AC pump

(locally procured)

AC pump

max : 10bar

Strainer

(locally procured)

40 mesh

Motorized 3-way valve

(locally procured)

AC230V

Booster heater

(local)

2-way valve for

cooling mode

(locally procured)

AC230V

Safety valve

set : 3.5bar

Boiler

(local)

Drain cock for water charge

(locally procured)

Cylinder heater

Ø

1 : 2.75kW

Relief valve(UK)

90°C

10 bar

Water outlet

Water inlet

Reducing

valve(UK)

3.5bar

Pressure relief

Set value : 7bar(UK)

Water heat exchanger

max : 10bar

Backup heater

Ø

1 : 3kWØ3 : 6kWØ3 : 9kW

Flow sw

Thermal protector

(auto)

set : 75 ± 3°C

Thermal protector

Single operation

set : 95 ± 5°C

Low pressure sensor

Pressure switch

4.15MPa

Expansion vessel

set : 1bar

Pressure relief valve

set : 3bar

Menometer

gage : - 6bar

Water vent

valve

Air vent valve

Outdoor unit

8~16kW

(Single phase)

(3 place)

Thermal cut-out

(manual reset)

82°C (+3k/ -2k)

zone1

zone2

TFI

TTW

TC

TWO

THO

TWI

Hot water cylinder

Local hot water system

40

Installation example of water circuit

The water flowing for a system without buffer tank ((1), (2), (3), (5)) requires17.5 /min (803XWH 13.0 /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 deficien cy. In this case, please provide a buffer ta nk and secondary pumps
as shown in (4).
Please check how to install the boiler (See page 52)

(1) (2)

(3) (4)

(5) (6)

41

7-2. Refrigeration Cycle System Diagram

HWS-803XWHM3-E, HWS-803XWHT6-E, HWS-803XWHD6-E, HWS-803XWHT9-E/HWS­803H-E

HWS-1403XWHM3-E, HWS-1403XWHT6-E, HWS-1403XWHD6-E, HWS-1403XWHT9-E/
HWS-1103H-E, HWS-1403H-E

P

TWO

THO

TWI

TC

TE

TO

TS

TD

Outdoor unit

Refrigerant R410A ... 1.8 kg

Expansion vessel

Backup heater

Manometer

Low
pressure
sensor

Pressure switch

Water vent valve

Safety valve

Air vent valve

Circulating pump
(UPS025-65 K 130)

Flow switch
(VH-8706)

Plate-type
water heat
exchanger

4-way valve
(STF-218G)

Pulse motor valve
(CAM-B30YGTF-2)

Outdoor heat
exchanger

Accumulator
(1800 cc)

Compressor
(DA220A2F-22L)

Heating / Hot-water supply
Defrosting / Cooling

Hydro unit

P

TE

TO

TS

TD

Outdoor unit

4-way valve
(STF-0401G)

Pulse motor valve
(UKV-25D100)

Outdoor heat
exchanger

Accumulator
(2500 cc)

Compressor
(DA422A3F-25M)

Heating / Hot-water supply
Defrosting / Cooling

TWO

THO

TWI

Hydro unit

Expansion vessel

Backup heater

Manometer

Water vent valve

Safety valve

Air vent valve

Circulating pump
(UPS25-80 130)

Flow switch
(VH-8705)

Plate-type
water heat
exchanger

TC

Low
pressure
sensor

Pressure switch

42

HWS-1403XWHM3-E, HWS-1403XWHT6-E, HWS-1403XWHD6-E, HWS-1403XWHT9-E/
HWS-1103H8(R)-E, HWS-1403H8(R)-E, HWS-1603H8(R)-E

P

TE

TO

TS

TD

Outdoor unit

4-way valve
(STF-0401G)

Pulse motor valve
(UKV-25D100)

Outdoor heat
exchanger

Accumulator
(2500 cc)

Compressor
(DA422A3F-27M)

Heating / Hot-water supply
Defrosting / Cooling

TWO

THO

TWI

Hydro unit

Expansion vessel

Backup heater

Manometer

Water vent valve

Safety valve

Air vent valve

Circulating pump
(UPS25-80 130)

Flow switch
(VH-8705)

Plate-type
water heat
exchanger

TC

Low
pressure
sensor

Pressure switch

Pressure switch

Muffler
Ø25 x L210
Ø25 x L180

43

8 Operational Description

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

Item

Page

8-1

8-1. Basic Operation

1) Operation control

2) Hot water supply operation

3) Heating operation

4) Cooling operation

44 to 46

8-2

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 (ANTI BACTERIA) operation

10) Night set back (NIGHT SET BACK) operation

11) FROST PROTECTION operation

12) AUTO operation

13) Night time low-noise operation

47 to 57

8-3

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 w ith th e th e rm o s ta t

8) Control of force stop and restart

9) Control of limit of heat pump operation

10)Output signal control 1

11)Output signal control 2

12) Q-H characteristics of hydro unit

13) Automatic restart control

14) Piping freeze prevention control

15) High return water protect control.

58 to 71

8-4

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) High pressure switch

12) Compressor case thermostat

13) Bottom plate heater control

72 to 80

44

Item Operation flow and applicable data, etc. Operation description

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, and 4-way valve.

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 control settings
<Heating> Temperature setting
<Hot water supply > Temperature setting
<Cooling> Temperature setting

Auto Temp
Anti Bacteria
Frost protection
Hot waterboost

Water heat
exchange
Sub board

Outdoor

unit control

Serial signals

transmit and receive

Outdoor unit contro
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

Td sensor
Ts sensor
Te sensor
To sensor
PMV
4-way valve

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

AC pump 1 (Built-in pump)

2WV_W
3WV_W

Mixing Valve

Pressure switch

Lo pressure sensor

AC 230 V for Hot water cylinder heater

AC 220 - 230 V for heat pump (Single phase type)
AC 380 - 400V for heat pump (3 phase type)

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

Serial
communication

High pressure switch (3 phase type only)

Hot water supply
heater MG

45

8-1.
Basic
Operation

2) Hot water supply operation Hot water supply 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)Set the [HOT WATER]
remote controller
button to “ON”.

2)The hydro unit
controller starts to
transmit a hot water
supply operation signal
to the outdoor unit
control unit.

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

4)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.

3) Heating operation Heating operation

1. Purpose
Heating

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

3. Operations

1)Set the [ZONE1, 2]
remote controller
button to “ON”.

2)The hydro unit
controller starts to
transmit a heating
operation signal to the
outdoor control unit.

3)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.

4)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.

Item Operation flow and applicable data, etc. Operation description

Hydro unit

control

[HOT WATER]

button set to "ON"

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

Hydro unit

control

ZONE1, 2

button set to "ON"

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 55°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

T1-20

E(20)

D(25)

C(30)

B(35)

A(40)

Set temperature

(TSC_F)

[°C]

0

T3 20

A, B, C, D, E Setting available range 20 to 55°C
T1 Setting available range -15 to 0°C
T3 Setting available range 0 to +15°C

46

8-1.
Basic
Operation

4) Cooling operation

NOTE:

No coding mode in default setting. When use the cooling mode, please change the
FC02 to “0”.

Related FC

1. Purpose
Cooling

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

3. Operations

1)Set the [ZONE1, 2]
remote controller
button to “ON”.

2)The hydro unit
controller starts to
transmit a cooling
operation signal to the
outdoor unit control
unit.

3)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.

4)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.

Item Operation flow and applicable data, etc. Operation description

Hydro unit

control

ZONE1, 2

button set to "ON"

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

Cooling temperature: 10°C to 25°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

FC No. Setting item Default Setting available range

02 Cooling mode availability 1: No 0: Yes

47

Item Operation flow and applicable data, etc.

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.

1)HWS-803XWH**-E

2)HWS-1103XWH**-E, 1403XWH**-E, 1603XWH**-E

TO

43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

9
8
7
6
5
4
3
2
1
0

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-11

-12

-13

-14

-15

-16

-17

-18

-19

-20

567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

Heater for heating

(Conditional operation range)
Start condition: The compressor
stops for less than 2 hours and
TD>50°C.

Heat pump operation
range of how water
supply and heating.

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

Heating
thermostat
OFF

Heater for heating

Cooling operation range

Water temperature at inlet (TWI)

TO

43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

9
8
7
6
5
4
3
2
1
0

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-11

-12

-13

-14

-15

-16

-17

-18

-19

-20

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Heater for heating

Heat pump operation range of
how water supply and heating

(Conditional operation range)
Start condition: The compressor
stops for less than 2 hours and
TD>40°C.

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

Heating
thermostat
OFF

Heater for heating

Cooling operation range

Water temperature at inlet (TWI)

48

8-2.
Operation Mode
and Control
Method

The following shows the operation modes and controlled objects.

O Possible

× Not possible

2) Hot water supply operation

1)Operation start condition
When the [HOT WATER] 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.

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 -20°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.

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

(Hot water cylinder unit)

TTW senso

r

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*

3

0°C -20-10°C

25 Outside air correction temperature for hot water supply*

3

3 degree 0 -15 degree

49

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.
<Operation for ZONE1 and ZONE2 (2 temperatures control)>

• 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
can be changed.

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

and .

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

see the description on MIXING VALVE control in 8-3-5.

1)Operation start condition
Pressing the [ZONE1, 2] button of remote controller starts a
heating 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.

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

• The remote controller gives a stop instruction.

*1:When the outside temperature is -20°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

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 55 37-55°C
1B Lower limit of heating (Zone1) limited temperature 20 20-37°C
1C Upper limit of heating (Zone2) limited temperature 55 37-55°C
1D Lower limit of heating (Zone2) limited temperature 20 20-37°C

50

8-2.
Operation Mode
and Control
Method

4) Cooling operation
Pressing the [ZONE1, 2] button and then [OPERATION MODE] starts a cooling operation.

1) Operation start condition
Pressing the [ZONE1, 2] button and then [OPERATION
MODE] starts a cooling operation.

2) Op

eration mode selection
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, th e coo li ng
operation stops.

• Th e 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

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.

• g zone Operation with heating priority
A heat pump operation is performed in the heating side, and
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: changeable) 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 -20°C, the h-zone operation continues for 60

minutes.

Item Operation flow and applicable data, etc.

TWI

TSC_F

(Temperature set with

remote controller)

TSC_F

Thermostat off operation

Heat pump operation
(cooling)

e zone

Diff : 2k

d zone

TSC is a cooling temperature
set with the remote controller

FC No. Setting item Default Setting available range

02 Cooling mode availability 1: Not permit 0: Permitted
18 Upper limit of cooling setting temperature 25 20-30°C
19 Lower limit of cooling setting temperature 10 10-20°C

Zone Hot water supply side Heating side

f Heat pump *2 Stop *2
g Heater Heat pump
h Heater *3 Heater *3

0

(FC22)

-20

Diff : 5deg

f zone

h zone *3

Diff : 5deg

g zone

Heater operation

Hot water

supply heat

pump priority

operation

Heating heat

pump priority

operation

TO

Zone Hot water supply side Heating side

f' Heater Heat pump

51

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.

8-2.
Operation Mode
and Control
Method

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_01 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

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting available range

07

Maximum HP operation time for hot water heater, when “hot
water supply” + “heating mode” both operate.

30 min 0-120min

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

02 Cooling mode availability 1: Not permit 0: Permitted
0F Heat pump operation for hot water supply permitted/not

permitted

0: Not permit 1:Permitted (Heat pump

may run for hot water

supply.)

52

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 P.C. 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
(Default).
when FC_5B=”1”, only the boiler runs (however, if the external air temperature becomes the boiler-HP switching
temperature or more within 60 minutes, the heater may run instead for up to 60 minutes.)
when FC_5B=”2”, the heater runs.

*1: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.

<Installation example>

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.)

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

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.)

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)

53

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 3-9) 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.

Related FC

Item Operation flow and applicable data, etc.

E

-10

I zone

J zone

Heat pump

operation

Heat pump &

boiler operation

TO

Diff : 5

K

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)

0

(After 3-way valve, heating side)

0 TWI or TWO or THO<58°C
1 TWI or TWO or THO<58°C

0

(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)

0

(Not installed)

0 TWI or TWO or THO 70°C (Beep)
1 TWI or TWO or THO 70°C (Beep)

1

(Installed)

0 TWI or TWO or THO 70°C (Beep)
1 No error detection *1 (No beep)

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 0: Boiler and Heat pump 1: Boiler only

2: Heater only

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

54

8-2.
Operation Mode
and Control
Method

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 [HOT WATER] button, a heat
pump operation 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.

Related FC

Item Operation flow and applicable data, etc.

75°C hot water operation (FC_09)

Switches to Hot water

supply operation

60 minutes operating time (FC_08)

Usual operation

HOT WATER button set to "ON"

HOT WATER BOOST button set to "ON"

Current heat pump

operation

Heating side

Hot water
supply side

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

55

8-2.
Operation Mode
and Control
Method

9) Anti bacteria (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 [HOT WATER] button and then the remote controller [ANTI BACTERIA] button changes the setting to
TSC_H = 75°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.

Related FC

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 bacter ia set temperature 75°C 65-80°C
0B Anti bacteria hold i ng time 30 min 0 - 60 min

Remote control OCAnti bacteria start time 22:00 0:00-22:00

Remote control ODAnti bacteria operation cycle 7 days Every day to 10 days

56

8-2.
Operation Mode
and Control
Method

10)Night set back (NIGHT SET BACK) operation
A night set back 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 SET BACK operation.

• T he set time can be changed with remote controller FC. (See page 114)

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 [ZONE1, 2] 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 control.

Longest period available: 20 days and 23 hours

• By entering the operation period (day and hour) at FC 12 and 13 on the remote control 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

Item Operation flow and applicable data, etc.

FC No. Setting item Default Setting available range

Remote controllerOENight set back start Time setting 22:00 0:00-23:00

Remote controllerOFNight set back end Time setting 6:00 0:00-2 3:00

26 Night set back setting Temperature width 5 degree 3 -20 degree
58 Night set back 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 control) FROST running period (days) 0 0-20 days
13 (remote control) FROST running period (hours) 0 0-23hours

57

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 by following the table below.

1) How to operate

• Pressing the remote controller [ZONE1, 2] button and then the [AUTO] button starts AUTO operation for heating. An
operation starts at the set temperature of straight -line approximation for the following: water temperature 40°C with
the outside temperature -20°C (FC), 35°C with -10 °C (T1)(FC), 30°C with 0°C (FC), 25°C with 10°C (T3), and 20°C
with 20°C (TC).

• For 2-temperature control, although Auto-Curve in ZONE2 shows 80% of that of ZONE1 (FC), the water temperature
setting does not fall below 20°C.

• During an AUTO operation, pressing again the [AUTO] button 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 [AUTO] button during an AUTO operation 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 55°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.

Related FC

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 460 rpm (803H-E)

500 rpm (1103H-E, 1403H-E)

(1103H8(R)-E, 1403H8(R)-E, 1603H8(R)-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.

1) Press the TEMP. and TEST button at the same time for 4 seconds or longer. (Shifted to the night time low­noise setting mode)
The Code No. field displays "09", and the DATA "0000", , and being displayed blink.

2) Press TIME to set enable "1" or disable "0".
Pressing SET change DATA and display to be lit and the setting is confirmed.
(When "1" as enable is set, the night time low-noise setting is enabled, the control starts at the set start time.)

3) Press TEST to exit the night time low-noise time setting mode. The and goes out, returning to its
original status.

Item Operation flow and applicable data, etc.

-10

(T1)

-20

20(E)

25(D)

30(C)

35(B)

40(A)

010

(T3)

20

Auto-Curve
ZONE1

Auto-Curve
ZONE2

FC No. Setting item Default Setting available range

18 Upper limit of cooling set temperature 25°C 20-30°C
19 Lower limit of cooling set temperature 10° C 10-20°C
1A Upper limit of heating (ZONE1) set temperature 55°C 37-55°C
1B Lower limit of heating (ZONE1) set temperature 20°C 20-37°C
1C Upper limit of heating (ZONE2) set temperature 55°C 37-55°C
1D Lower limit of heating (ZONE2) set temperature 20°C 20-37°C
27 Set temperature shift with heating set to Auto 0 -5 to 5 k
29 Outside air temperature T1 temperature -10°C -15-0°C
2B Outside air temperature T3 temperature 10°C 0-15°C
2C Set temperature when out side air temperature is -20 °C. 40°C 20-55°C
2D Set temperature when out side air temperature is -10 °C (T1). 35°C 20-55°C
2E Set temperature when out side air temperature is 0 °C. 30°C 20-55°C
2F Set temperature when out side air temperature is 10 °C (T3). 25°C 20-55°C
30 Set temperature when out side air temperature is 20 °C. 20°C 20-55°C
31 Auto-Curve ratio of ZONE2 80% 0-100%

58

8-3.
Hydro Unit Control

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.

Item Operation flow and applicable data, etc.

Temperature settings

(TSC_H, TSC_F)

Hz signal correction

Number of compressor

rotation detection

Remote controller

Water outlet temperature

(THO, TWO)

Hydro unit

TSC_H-THO for hot water supply

TSC_F-TWO

for heating/cooling

Inverter output change

Hz signal correction Operation Hz

Number of compressor

rotation change

Compressor frequency changeable range 10 Hz to 70 Hz (803, 1403H-E, 1603H8(R)-E)

10 Hz to 60 Hz (1103H-E, 1103H8(R)-E)
10 Hz to 66 Hz (1403H8(R)-E)

59

8-3.
Hydro Unit Control

1-2)High 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 + 2 degree) 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 > 62°C causes the compressor to stop abnormally. When the compressor restarts 140 seconds after the stop
and TC > 62°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+2degree (°C)

1-3)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)

Item Operation flow and applicable data, etc.

T11

(62.0°C)

TC (TWO+2)

Forcible stop
O (down)

P (slow down)
Q (keep)
R2 (slow up)

R1
(slow up)

S (normal)

T9

T10

T8
T7

Zone Control operation

R1 Increase compressor frequency by 1.2 Hz every

60 sec.

R2 Increase compressor frequency by 0.6 Hz every

60 sec.

O Decrease compressor frequency to 70% every

10 sec.

P Decrease compressor frequency by 3 Hz every

10 sec.

Q Keep compressor frequency.

TWI T7T8T9T10T11

TWI<30 57.0 59.0 60.0 61.0 62.0
30 TWI<35 57.0 59.0 60.0 61.0 62.0
35 TWI<40 56.5 58.5 59.5 60.5 62.0
40 TWI<45 56.5 58.5 59.5 60.5 62.0
45 TWI<50 56.0 58.0 59.0 60.0 62.0

50 TWI 56.0 58.0 59.0 60.0 62.0

T7

Forcible stop

O (down)

P (slow down)

Q (keep)

R2 (slow up)

R1
(slow up)

S (normal)

T9

T8

T10
T11

TC (TWO)

Zone Control operation

R1 Increase compressor frequency by 1.2 Hz every

60 sec.

R2 Increase compressor frequency by 0.6 Hz every

60 sec.

O Decrease compressor frequency to 70% every

10 sec.

P Decrease compressor frequency by 3 Hz every

10 sec.

Q Keep compressor frequency.

TWI T7T8T9T10T11

TWI<10 10.0 8.0 6.0 4.0 3.0
10 TWI<15 10.5 8.5 6.5 4.5 3.0
15 TWI<20 11.0 9.0 7.0 5.0 3.0

20 TWI 11.5 9.5 7.5 5.5 3.0

60

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 (2.75 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.

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.

The single-phase model of 3 kW has the backup heater 1 only.
The three-phase model of 6 kW has heater 1+2 of 6 kW.

Item Operation flow and applicable data, etc.

85

Heat pump_OFF(45)

TSC_H

TTW

Z zone

Diff : 2K

TSC_H-4

Hot Water Boost
Heater on only with
Hot Water Boost in operation

Abnormality detection (A03 displayed

)

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

Y zone
Heater off

X zone
Heater on

(Heater on without
hot water heat
pump)

70

TSC_F-2

TSC_F-4

TSC_F-0

(+2)

*1

THO

E zone

D zone

C zone

B zone

A zone

Diff : 2K

Diff : 2K

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-803H-E only

Status Heater ON / OFF

Heater 1 Backup heater 3 kW = ON
Heater 2 Backup heater 9 kW = ON

61

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.

The single-phase model of 3 kW has the backup heater 1 only.
The three-phase model of 6 kW has heater 1+2 of 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 de frosting

• 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 follows.

1)When the heater outlet temperature sensor (THO) drops to
the temperature of 2°C below the set temperature

Defrosting ends according to the usual heater control.

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.

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.

(Caution)

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

Item Operation flow and applicable data, etc.

70

TSC_F-0

TSC_F-2

TSC_F+2

THO

E zone

D zone

C zone

B zone

A zone

Diff : 2K

Diff : 2K

Diff : 2K

Abnormality detection

Heater off

KEEP

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

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

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

Heater off

Heater 1
Heater 1

TSC_F

TSC_F-β (β=2)

TSC_F-α (α=4)

THO

Status Heater ON / OFF

Heater 1 Backup heater 3 kW = ON

62

8-3.
Hydro Unit Control

3) Circulation pump control

One circulation pump (enhancing pump P2) can be connected to the unit in addition to the bui lt-in circula tion
pump P1.
You can change the settings of the built-in pump P1 and the enhancing pump P2 usin g DP_SW10-1, 2, and
3 in the hydro unit.

If the enhancing pump P2 is set to Non-interlock, the pump P1 is always energized.

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

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

• When the [HOT WATER] or [ZONE1,2] button is pressed.

The pump operation stops under the condition below:

• When the [HOT WATER] or [ZONE1,2] 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 pump P1 during the hot water supply operation

You can change the action of the built-in 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 pump P1 during the heating operation

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

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

• DP_SW10-1 ON : The pump stops when To ≥ 20°C. (Practically the HP for heating is turned off.)

3-4)Enhancing circulation pump P2

Pump type: AC motor, rated voltage 230V, connectable directly up to 200W rated power output.
You can select whether the pump P2 is interlocked with the pump P1 using DP_SW10-3. The pump P1 is always
energized if the pump P2 is not interlocked.

3-5)Controlling the enhancing pump P2

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

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

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

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

temperature remote control.
You can change the action of the built-in 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.

Related FC

Item Operation flow and applicable data, etc.

Item Operation Initial value DPSW

AC pump 01: Built-in pump P1’s action during how water supply operation:

HP operation only/Always energized

OFF: HP operation
only

SW10-1

02: Built-in 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: Enhancing pump P2’s action:

Interlock/Non-interlock with the built-in pump P1

OFF: Interlock

*2

SW10-3

04: None

Boiler is installed or not

(DPSW13_2)

Boiler position

(DPSW02_1)

P1 pump control

Stop/restart temperatures

(TWI or TWO or THO)

0

(Not installed)

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

1 (Before 3-way valve) 70°C / 68°C

1

(Installed)

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

1 (Before 3-way valve) 58°C / 55°C

FC No. Setting item Default Setting value

5A Control of the pump P1 during the hot water supply operation 0: Interlocked with HP

1: Always energized
Equal to DPSW10-1

64 Control of the pump P2 during in cooling operation 0: Always ON 1: Always stopped
65

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

63

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 803**-E and 1403**-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.

Related FC

6) Room temperature control

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

6-1)Installing the sub remote control

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

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

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

DP_SW01,02=”ON”(DP_SW03,04=“OFF”)

Item Operation flow and applicable data, etc.

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

HWS-803**-E 13L or more water flows per minute Water less than 13L flows per minute
HWS-1403**-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 control

DP_SW01,02=”ON”
(DP_SW03,04=“OFF”)

Connecting terminal on
the remote controller

64

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.

• The target water outlet temperature is adjusted by 1deg every 30 minutes based on the TSC_rc, the temperature

setting on the remote control, and the room temperature (temperature indicated on the remote control: T_rc). The
adjustable range of water temperature is set with FC18-1B.

• The temperature set on the remote control and actual room temperature may differ depending on the place of the

remote control or room space. In that case, adjust temperature detection using FC02 (for heating) and FC03 (for
cooling) on the remote control.

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

• Setting temperature (remote controller) is higher than room temperature: example. 1deg

Change remote controller FC02, 03 = “-1K” to “-2K”

• Setting temperature (remote controller) is lower than room temperature: example. 1deg

Change remote controller FC02, 03 = “-1K” to “0”

Related FC

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 P.C. 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 p.c. 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 120cm-180cm on a wall

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

Item Operation flow and applicable data, etc.

Heating operation

A zone
B zone
C zone

D zone

Cooling operation

D zone

C zone

B zone

A zone

Thermo off

Thermo off

T_rc

TSC_rc+

TSC_rc+

TSC_rc-

=1.0
=0.5
=0.5

TSC_rc+

TSC_rc+

TSC_rc+

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.

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

A zone Thermo off

FC No. Setting item Default Variable range

18 Upper limit of cooling temperature settin g 25 18-25°C
19 Lower limit of cooling temperature setting 10 10-18°C
1A Upper limit of heating temperature setting (Zone 1) 55 37-55°C
1B Lower limit of heating temperature setting (Zone 1) 20 20-37°C
40 Room temperature control 0 0:Not permitted 1:Permitted

96

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

20 10-25°C

9D

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

40 20-55°C

02 (remote control) Room temperature correction (at heating) -1 -10K - +10K, 1K step
03 (remote control) Room temperature correction (at cooling) -1 -10K - +10K, 1K step

65

8-3.
Hydro Unit Control

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. 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. 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.

Item Operation flow and applicable data, etc.

PJ17

Terminal label

TCB-PCMO3E

CN210
Red

CN211
Black

Room thermostat Correction control Heating operation Cooling operation

CLOSE

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.

66

8-3.
Hydro Unit Control

8) Control of force stop and restart
The unit can be stopped and restarted with external input. By setting FC52 and FC61, you can set an operation mode
to run/stop or can run/stop the unit in the mode assigned on the remote control.

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

8-1)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=”24”: 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 closed.

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

8-2)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 control (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 control.)

• FC61=”2”:Hot water supply only

• FC61=”3”:Heating only

8-3)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 68)

8-4)Setting example

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

Item Operation flow and applicable data, etc.

PJ20

Terminal label

TCB-PCIN3E

CN208
Blue

CN209
Green

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

↓

↓

↓

67

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 h eating& 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 control (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 h eating& 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
the pattern before the unit OFF by pulse.

Related FC

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 0-3 (See 8-1.)
61 Object to control 0 0-3 (See 8-2.)

68

9) 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.

9-1)Setting the control method

Select an operation mode by setting FC61.

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

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

9-2)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 a s 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.

10)Output signal control 1

(TCB-PCIN3E optional P.C. board is required. Conn ect its connection cable to the CN208 terminal on the P.C.
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 RED lamp on the P.C. board lights up when the signals are output.

11)Output signal control 2

(TCB-PCIN3E optional P.C. board is required. Conn ect its connection cable to the CN209 terminal on the P.C.
board in the hydro unit.)

< FC67=”0”: Default >

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

• Th e 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
control is ON)
The RED lamp on the P.C. board lights up
when the signals are output.

Related FC

Item Operation flow and applicable data, etc.

PJ20

Terminal label

TCB-PCIN3E

CN208
Blue

CN209
Green

PJ20

Terminal label

TCB-PCIN3E

CN208
Blue

CN209
Green

FC No. Setting item Default Setting value

67

Changing the condition of optional
output (For the optional P.C. board
connected to CN209)

0: 1-3 During defrosting
2-3 While compressor is running.

1: 1-3 As error is detected
2-3 During operation

69

12)Q-H characteristics of hydro unit

The following shows the Q-H characteristics.

12-1)HWS-803XWHM3-E, T6-E, D6-E, T9-E

12-2)HWS-1403XWHM3-E, T6-E, D6-E, T9-E

Item Operation flow and applicable data, etc.

Flow rate(L/min)

Pump head(m)

0

10 15 20 25 30

1

2

3

4

5

6

7

8

SW1

SW2

SW3

230V

220V

230V

220V

230V

220V

Minimum flow rate

Hydraulic heat exchanger(8kW)QH characteristics

Out of
Operation
Range

0

0 5 10 15 20

Flow rate(L/min)

25 30 35 40 45 50 55 60 65

1

2

3

4

Pump head(m)

5

6

7

8

9

Minimum flow rate

Hydraulic heat exchanger(14kW)QH characteristics

10

Out of Operation
Range

SW1

SW2

SW3

230V

220V

230V

220V

230V

220V

70

8-3.
Hydro Unit Control

13)Automatic restart control

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

13-1)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 Set Back, Anti Bacteria) are disabled.
The remote controller time displays "--:--". (The merit functions are disabled)

13-2)Operation during forcible automatic operation

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

13-3) 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)

Heating operation (Night Set Back)

14)Piping freeze prevention control

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.

14-1)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] nor [ZONE1, 2] 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] nor [ZONE1, 2] 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)

14-2)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 30 seconds or longer. Or
TWO 20°C, TC+TWO<4°C is continuously detected for 30 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.

14-3)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.

Item Operation flow and applicable data, etc.

71

8-3.
Hydro Unit Control

14-4)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

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)

2)Determination cancellation condition

• After a restart, the start condition is not met for 30 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.

15)High return water protect control.

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

When A02 error appeared, the built-in 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)

Item Operation flow and applicable data, etc.

70

TWI, TWO, THO

(Diff : 2K)

A02 error detect

Heat pump normal operation

Heat pump stop

50

FC No. Setting item Default Setting available range

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

72

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 2 to 4 K (for
803H-E) or -1 to 4 K (for 1103, 1403H-E) +1to 4 K (11 to 1603H8(R)-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.

Item Operation flow and applicable data, etc.

TD [°C]

111

109

106

103

96

Abnormal stop

Frequency normal down

Frequency slow down

Frequency hold

Frequency slow up

(up to the point instructed)

As instructed

73

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.

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

No

Outside temperature

TO (degree °C)

Current release value (A)

803H-E 1103H-E, 1403H-E 1103H8(R)E, 1403H8(R)E, 1603H8(R)E

35 TO 12.0 11.2

15 TO < 35 20.0 - (To - 15) × 0.4 13.2 - (To - 15) × 0.1

TO < 15 18.0 20.0 13.2

Outside temperature

TO (degree °C)

Current release value (A)

803H-E 1103, 1403H-E 1103H8(R)-E 1403H8(R)-E 1603H8(R)-E

44 TO 9.5 15.0 47.0 7.5 7.5
39 TO < 44 13.0 17.7 7.5 8.7 9.6
10 TO < 39 16.0 20.0 9.6 9.6 9.6

12.0

20.0

1103, 1403H-E
803H-E

18.0

CT(A)

15 35 TO

11.2

1103 to 1603H8(R)-E

Heating, Hot water supply

9.5

16.0

15.0

20.0

CT(A)

10 39 44

1103,
1403H-E

803H-E

TO

Cooling

7.5

8.7

9.6

CT(A)

10 44 47

39

1103H8(R)-E

1403H(R)-E

1603H8(R)-E

74

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
indoor side (Hydro unit) control part.

* 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 TL sensor temperature.

Item Operation flow and applicable data, etc.

Temperature range 803H-E 1103H-E 1403H-E

50°C TO 10.5 14.1 14.1
45°C TO < 50°C 10.5 14.1 14.1
39°C TO < 45°C 14.0 14.1 16.4

TO < 39°C 16.0 14.1 16.4

TO error 10.5 14.1 14.1

Temperature range 1103H8(R)-E 1403H8(R)-E 1603H8(R)-E

47°C TO 7.5 7.5 7.5
39°C TO < 47°C 7.5 8.7 9.6

10 TO < 39°C 9.6 9.6 9.6

TO error 7.5 7.5 7.5

W1 W2 W3 W4 W5 W6 W7 W8

803H-E 200 230 260 300 340 380 420 460
1103,

1403H-E
1103 to 1603H8(R)-E

Upper 200 240 240 260 320 380 480 500
Lower 200 200 200 280 360 400 500 520

W9 WA WB WC WD WE WF

803H-E 520 570 600 630 670 710 740
1103,

1403H-E
1103 to 1603H8(R)-E

Upper 530 610 640 660 720 780 890
Lower 550 630 660 700 740 820 910

TL [°C]

58

55

38
35

WE tap

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

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

Number of rotation hold

75

8-4.
Outdoor unit
control

HWS-803H-E

HWS-1103H-E, 1403H-E

HWS-1103H8(R)-E, 1403H8(R)-E, 1603H8(R)-E

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

Minimum Maximum Minimum Maximum Minimum Maximum

38°C TO W6 WC W8 WE WA WE
29°C TO < 38°C W5 WB W7 WD W9 WD
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°CW2W4W4W6W5W8

-4°C TO < 0°CW2W3W3W5W4W6
TO < -4°C OFF OFF OFF W2 OFF W3

TO error OFF WC OFF WE OFF WE

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

WC

(WB for 1102)

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°CW2W4W4W6W5W8

-4°C TO < 0°CW2W3W3W5W4W6
TO < -4°C W1 W2 W1 W4 W2 W6

TO error W1WCW1WCW2WD

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 WD WA WD

29°C TO < 38°C W5 WB W7

WC

(WB for 1103)

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°CW2W4W4W6W5W8

-4°C TO < 0°CW2W3W3W5W4W6
TO < -4°C W1 W2 W1 W4 W2 W6

TO error W1WCW1WDW2WD

76

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.

3)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.

NOTE

It TO < -5°C and the heat-pump was thermo-off, the out-door fan motor (up/down) continue to run 10 mins with W3
rotation.

For 803H-E

For 1103H-E

For 1403H-E

Item Operation flow and applicable data, etc.

TE [°C]

24

21

18

15

-1 tap/20 secs (to W1)

-2 tap/20 secs (to W1)

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

Number of revolutions hold
+ 1 tap/20 secs

(Up to the maximum tap for each zone)

Temperature range

Less than 20 Hz

20 Hz or more to less

than 45 Hz

45 Hz or more

Maximum Maximum Maximum

10°C TO W7 W8 W9

5°C TO < 10°C W9 WB WD

-3°C TO < 5°C WD WD WE

-10°C TO < -3°C WE WE WE
TO < -10°C WF WF WF

TO abnormal WF WF WF

Temperature range

Less than 20 Hz

20 Hz or more to less

than 45 Hz

45 Hz or more

Maximum Maximum Maximum

10°C TO 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

Temperature range

Less than 20 Hz

20 Hz or more to less

than 45 Hz

45 Hz or more

Maximum Maximum Maximum

10°C TO W7 W8 W9

5°C TO < 10°C W9 WA WB

-3°C TO < 5°C WB WB WC

-10°C TO < -3°C WC WC WC
TO < -10°C WD WD WD

TO abnormal WD WD WD

77

For 1103H8(R)-E

For 1403H8(R)-E, 1603H8(R)-E

(1603H8-E, 1603H8R-E only)

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

10°C TO W7 W8 W9

5°C TO < 10°C W9 WA WA

-3°C TO < 5°C WA WA WC

-10°C TO < -3°C WC WC WC
TO < -10°C WD WD WD

TO abnormal WD WD WD

Temperature range

Less than 20 Hz

20 Hz or more to less

than 45 Hz

45 Hz or more

Maximum Maximum Maximum

10°C TO W7 W8 W9

5°C TO < 10°C W9 WA WB (WC)

-3°C TO < 5°C WB (WC) WB (WC) WC

-10°C TO < -3°C WC WC WC
TO < -10°C WD WD WD

TO abnormal WD WD WD

78

8-4.
Outdoor unit
control

6) Defrosting control
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)

Jumper switching O: Short circuit ×: Open

Item Operation flow and applicable data, etc.

Heating operation starts

-2

-5

-10

-23

(-25)*

2

TE
[°C]

0 10 15 39 45 55 [d]

[min]

D zone

A zone

B zone

C zone

*1

*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.

*

2

Inside brackets: For 803H-E

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 (except 803H-E)

Maintain " TE < -25°C" for 20 sec (803H-E)

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

To Normal

A Zone Maintain " TEO - TE 3°C" for 20 sec
B Zone Maintain " TEO - TE 2°C" for 20 sec

C Zone

Maintain " TE -23°C" for 20 sec (except 803H-E)

Maintain " TE < -25°C" for 20 sec (803H-E)

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

J805 J806 [d]

O O 150 min (Factory default)
O × 90 min

× O 60 min
× × 30 min

ON

OFF

ON

OFF

ON

OFF

500pulse
200pulse

0pulse

0s 30s 40s

Defrosting operation

0s 30s10s 40s

Outdoor PMV

4-way valve

Outdoor fan

Compressor

79

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.

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)

Item Operation flow and applicable data, etc.

(Usual)

18

°C

15

°C

10

°C

8

°C

TO

*Energization
condition
TD 30°C

Not energized

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

Continuously energized
Output "equal to 40W"

(when TO sensor fails)

20

°C

18

°C

12

°C

10

°C

TE

*Energization
condition
TD 30°C

Not energized

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

Continuously energized
Output "equals to 40W"

80

8-4.
Outdoor unit
control

10)High pressure release control

1)To prevent excessive hi pressure rise, operation frequency is controlled by the TL sensor when cooling and by TWO
sensor when heating.

2)If the TL sensor when cooling or the TWO sensor when heating detects an abnormal stop zone temperature, the
compressor stops and the abnormality detection counter increments.

3)When the compressor stops in 2), the operation restarts when the temperature returns to the usual operation zone
("e" or below) after 150 seconds.

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 and the compressor does not restart.

5)For details about an check code displayed, see the check code list.

11)High pressure switch
The high pressure switch detects abnormal high pressure (higher than 4.15Mpa) in cooling cycle and protect the
compressor.

• The high pressure switch stops the compressor as the pressure in the cooling cycle becomes higher than 4.15Mpa.

• Th e compressor will restart three minutes after stopping.

• If the high pressure switch functions again after restarting, the compressor stops and the “A07” error code is
indicated.

12)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.

• Th e 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.

13)Bottom plate heater control
13-1)Controllable models (Models equipped with the bottom plate heater (outdoor,3 phases, 400V) only)

• HWS-1403XWH**-E/HWS-1103H8R-E

• HWS-1403XWH**-E/HWS-1403H8R-E

• HWS-1403XWH**-E/HWS-1603H8R-E

13-2)Target to control

Control ON and OFF of the bottom plate heater using the outdoor temperature sensor (To).

Item Operation flow and applicable data, etc.

[°C]

Heating TC
Cooling TL

a

b

c

d

e

Abnormal stop

Frequency normal down

Frequency slow down

Frequency hold

Frequency slow up

(up to the point instructed)

As instructed

803H-E 1103H-E, 1403H-E 1103H8(R)-E, 1403H8(R)-E, 1603H8(R)-E

Heating Cooling Heating Cooling Heating Cooling

TC (TWO+2) TL TC (TWO+2) TL TC (TWO+2) TL

a 64°C 63°C 64°C 63°C 62°C 63°C
b 62°C 62°C 62°C 62°C 59°C 62°C

c 60°C 60°C 60°C 60°C 57°C 60°C
d 58°C 58°C 58°C 58°C 52°C 58°C
e 54°C 54°C 54°C 54°C 51°C 54°C

+2

To

0

Bottom plate
heater is turned on

Bottom plate
heater is turned off

81

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 control.

Please refer to the following procedure of defect diagnosis for the identification.

No. Procedure of defect diagnosis Remark

9-1

Matters to be confirmed first 9-1-1Check the power supply voltage

9-1-2Check for any miswiring of the

connection cables between the hydro
unit and the outdoor unit

9-1-3About the installation of the

temperature sensor

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.

9-2

Non-defective operation (program operation) Non-defective program operations for the

protection of the heat pump unit.

9-3

Outline of the determination
diagram

9-3-1Procedure of defect diagnosis
9-3-2How to determine from the check

code display on the remote controller

9-3-3How to cancel a check code on the

remote controller

9-3-4How to diagnose by error code

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.

9-4

Diagnosis flow chart for each
error code

9-4-1Hydro unit failure detection
9-4-2Outdoor unit failure detection
9-4-3Temperature sensor, temperature-

resistance characteristic table

9-5

Operation check by PC board 9-5-1Operation check mode The operation check mode allows to

determine good or not by checking the
operation of the 4-way valve, 2-way valve
and pulse motor valve.

9-6

Brief method for checking the
key components

9-6-1Hydro unit
9-6-2Outdoor unit

How to determine the presence of any
defect particularly in functional parts.

82

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 type), AC380-400 V± 10 % (3 phase
type). If the power supply voltage is not in this range, it may no t op er at e no rm a lly.

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 p ut 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

1

The compressor sometimes does not operate even within the
range of compressor “ON”.

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.

2

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.

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.

3

The “Stop” operation on the remote control will not stop the
circulating pump. (The same for hot water supply, heating and
cooling)

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.

4

“ON” on the remote control will not operate the compressor. (It
will not operate even after the reboot delay timer elapsed)

When the outdoor temperature (TO sensor detection
temperature) is -20°C or lower, the heat pump will not op erate
in order to protect the compressor, and the heater will operate
instead.

5

When the power is turned on, it starts operation without
operating the remote control.

• 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 circulating pump

--->> circulating pump + heater.)

83

9-3. Outline of the determination diagram

The first determination of whether a defective part is in the hydro unit o r the outdoo r unit can be performe d 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.

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

control

If the defect is limited by the check code displayed on the remote control, 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 control check
code display part while sounding off a buzzer.

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

(1)Press or button (on the operation side) to clear the check code.
(2)Press to stop a buzzer for an abnormality only.

Although the above procedure cancels the check code, the hardware error will be displayed again until the
hardware repair is completed.

Defect

Yes

Yes

Yes

No

No

No

Confirm the check
code on the remote
control display

Check code

A01-A12

Check code

L07-L16

Check code

FXX

Defect in Hydro unit

Abnormality in the
communication or setting
system

Abnormality in the water
heat exchange or outdoor
unit sensor system

Abnormality in the outdoor unit or hot-water
tank unit

Check code display part

ZONE1,2 HOT WATER

CL

84

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

Defect mode detected by the water heat exchange

O ... Possible

×.... Not possible

Check

code

Diagnostic functional operation

Determination and action

Number of

abnormalities

for

confirmation

Detailed

item

Operational cause

Backup
present

Automat

ic reset

A01

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).

×

×

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

491

2)Detected by flow switch abnormality
When no signal of the flow switch is

showing 2 min after the built-in pump
operation started.

291

3)Detection of chattering abnormality in
the flow switch input

Chattering detection: Detects input
changes (OFF⇔ON) 4 times within
10 seconds during operation.

491

4)Disconnection of the flow switch
connector

When the stopped built-in pump starts
its operation, the flow switch status is
detecting "water flow".

1.Disconnection of the flow switch
connector.

2.Defect of the flow switch.

291

A02

Temperature increase error (heating)
When one of the TWI, TWO and THO
sensors exceeds 70°C.

Heating

×

Hot water

O

O

1.Check the water inlet, water outlet
and heater outlet (TWI, TWO, THO)
sensors.

2.Defect of the backup heater (defect
automatic reset thermostat).

192

A03

Temperature increase error (hot water
supply)
When the TTW sensor exceeds 85°C.

Heating

O

Hot water

×

O

1.Check the hot water cylinder sensor
(TTW).

2.Check the hot water cylinder thermal
cut-out.

193

A04

Antifreeze operation

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
defrosting.

O

×

1.Almost no or little water flow.

• Dirt clogging in the water piping
system.

• The water piping is too long.

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.

Heating2

Hot water2

Cooling4

94

A05

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.

OO

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.

195

85

A07

Pressure switch operation

The pressure switch operates for 300
sec continuously during the heat pump
operation.

O

×

1.Almost no or little water flow.

2.Defect of the flow switch.

3.On-load operation under the above

conditions.

4.Defect in the pressure switch.

196

A08

Low pressure sensor operation error

The low pressure sensor detec t ed 0.2
MPa or less.

O ×

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.

8

97

4.Defect in the low pressure sensor. 2

A09

Overheat protection operation

When the thermostat of the backup
heater activates during the operation of
the heat pump or backup heater.
When the thermostat operation is
activated while it has been stopped.

O

×

1.No water (heating without water) or

no water flow.

2.Defect of the flow switch.

2

98

3.Defect of the backup heater (poor

automatic reset thermostat).

1

A11

Operation of the release protection

When the TWO release counts to 10.

Heating
Cooling

×

Hot water

O

×

1.Almost no water flow.

2.Defect of the flow switch.

3.Check the water outlet temperature

sensor (TWO).

10 99

A12

Heating, hot water heater

The antifreeze control is detected under
the condition of TWI<20°C while
TWI

>15°C, TTW>20°C is not detected

after the heater backup.

OO

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

1100

E03

Regular communication error
between hydro unit and remote
controller

When there is no regular communication
from the remote control for 3 min, or
when no remote control is equipped.

× O

1.Check remote control connection.

2.Defect in the remote control.

1—

E04

Regular communication error
between hydro unit and outdoor unit

The serial signal cannot be received
from outdoor.

OO

1.Check the serial circuit.

• Miswiring of the crossover between
the water heat exchanger and the
outdoor unit

1101

F03

TC sensor error

Open or short circuit in the heat
exchange temperature sensor.

OO

1.Check the resistance value and

connection of the heat exchange
temperature sensor (TC).

1101

F10

TWI sensor error

Open or short circuit in the water inlet
temperature sensor.

OO

1.Check the resistance value and

connection of the water inlet
temperature sensor (TWI).

1103

F11

TWO sensor error

Open or short circuit in the water outlet
temperature sensor.

× O

1.Check the resistance value and

connection of the water outlet
temperature sensor (TWO).

1103

F14

TTW sensor error

Open or short circuit in the hot water
cylinder sensor.

× O

1.Check the resistance value and

connection of the hot water cylinder
sensor (TTW).

1104

Check

code

Diagnostic functional operation

Determination and action

Number of

abnormalities

for

confirmation

Detailed

item

Operational cause

Backup
present

Automat

ic reset

86

F17

TFI sensor error

Open or short circuit in the floor
temperature sensor.

× O

1.Check the resistance value and

connection of the floor-inlet
temperature sensor (TFI).

1104

F18

THO sensor error

Open or short circuit in the heater outlet
temperature sensor.

× O

1.Check the resistance value and

connection of the heater outlet
temperature sensor (THO).

1104

F19

Detection of THO disconnection error

When TWO–THO>15K is detected and
30 sec elapsed.

××

1.Check for any disconnection of the

heater outlet temperature sensor
(THO).

1105

F20

TFI sensor error

When TWO–TFI>30K is detected and
TFI<TWI–5K is detected.

××

1.Check the connection of the floor-

inlet temperature sensor (TFI).

1106

F23

Low pressure sensor error

When PS<0.07 MPa is detected for 90
sec or more. (cooling, defrosting)
When PS<0.07 MPa is detected for 10
min or more. (hot water supply, heading)

OO

1.Check the connection (body or

connection wiring) of the low
pressure sensor.

2.Check the resistance value of the

low pressure sensor.

1107

F29

EEROM error

Inconsistency is detected once without
verify ACK after writing to EEPROM.

××

1.Replace the water heat exchange

control board.

1107

F30

Extended IC error

When the extended IC is abnormal.

××

1.Replace the water heat exchange

control board.

1107

L07

Communication error

Individual hydro units have a group line.

××

1.Replace the water heat exchange

control board.

1107

L09

Communication error

The capability code for the hydro unit
has not been set.

××

1.Check the setting of the FC01

capability specifications.
HWS-803xx-E = 0012
HWS-1403xx-E = 0017

1108

L16

Setting error

When ZONE1 has not been set, while
ZONE2 has been set.

××1.Check the body DP-SW12_2,3. 1 108

Check

code

Diagnostic functional operation

Determination and action

Number of

abnormalities

for

confirmation

Detailed

item

Operational cause

Backup
present

Automat

ic reset

87

Defect mode detected by the outdoor unit

O ... Possible

×.... Not possible

Check

code

Diagnostic functional operation

Determination and action

Number of

abnormalities

for

confirmation

Detailed

item

Operational cause

Backup
present

Automat

ic reset

F04

TD sensor error

Open or short circuit in the discharge
temperature sensor.

O ×

1.Check the resistance value and

connection of the discharge sensor
(TD).

1

102
119

F06

TE sensor error

Open or short circuit in the heat
exchange temperature sensor.

O

×

1.Check the resistance value and

connection of the heat exchange
temperature sensor (TE).

1

102
119

F07

TL sensor error

Open or short circuit in the heat
exchange temperature sensor.

O

×

1.Check the resistance value and

connection of the heat exchange
temperature sensor (TL).

1

102
119

F08

TO sensor error

Open or short circuit in the outdoor
temperature sensor.

O

×

1.Check the resistance value and

connection of the outdoor
temperature sensor (TO).

1

103
120

F12

TS sensor error

Open or short circuit in the suction
temperature sensor.

O

×

1.Check the resistance value and

connection of the suction
temperature sensor (TS).

1120

F13

TH sensor error

Open or short circuit in the heat-sink
temperature sensor.

O

×

1.Check the resistance value and

connection of the heat-sink
temperature sensor (TH).

1120

F15

TE, TS sensors error

Open or short circuit in the temperature
sensors.

O ×

1.Check for any wrong installation of

the heat exchange temperature
sensor (TE) and the suction
temperature sensor (TS).

1120

F31 EEPROM error O

× 1121

H01

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.

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.

O

×

1.Check the power supply voltage

(AC220-230 V±10 %: single phase
type).
(AC380-400 V±10 %: 3 phase type).

2.Over-loaded condition of the

refrigeration cycle.

3.Check that the service valve is fully

open.

8109

H02

Compressor lock

1 When the input current is more than

zero 20 sec or later after the
compressor activation and the
activation has not been completed.

O

×

1.Defect of compressor (lock)

– Replace the compressor.

2.Defect of compressor wiring (open

phase).

8110

H03

Defect in the current detection circuit

O ×

1.Replace the outdoor inverter control

board.

8110

88

H04

Operation of case thermostat

When the case thermostat exceeds
125°C.

O

×

1.Check the refrigeration cycle (gas

leak).

2.Check the case thermostat and

connector.

3.Check that the service valve is fully

open.

4.Defect of the pulse motor valve.

5.Check for kinked piping.

4110

L10

Unset service PC board jumper

Jumpers J800-J803 have not been cut.

O × 1.Cut J800-J803. 1 111

L29

The communication between the
outdoor PC board MUCs error

No communication signal between IPDU
and CDB.

O

× 1. Replace the outdoor control board. 1 111

P03

The outlet temperature error

When the discharge temperature sensor
(TD) exceeds 111°C.

O

×

1.Check the refrigeration cycle (gas

leak).

2.Defect of the pulse motor valve.

3.Check the resistance value of the

discharge temperature sensor (TD).

4112

P04 The high pressure switch error O × 10 113

P05

The power supply voltage error

When the power supply voltage is
extremely high or low.

O ×

1.Check the power supply voltage.

(AC220-230 V±10 %: single phase
type).
(AC380-400 V±10 %: 3 phase type).

4114

P07

Overheating of heat-sink error

When the heat-sink exceeds 105°C.

O

×

1.Check the thread fastening and

heat-sink grease between the
outdoor control board and the heat­sink.

2.Check the heat-sink fan duct.

3.Check the resistance value of the

heat-sink temperature sensor (TH).

4114

P15

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
for heating for 10 consecutive min.

O

×

1.Check the refrigeration cycle (gas

leak).

2.Check that the service valve is fully

open.

3.Defect of the pulse motor valve.

4.Check for kinked piping.

5.Check the resistance value of the

discharge temperature sensor (TD)
and the suction temperature sensor
(TS).

4115

P19

The 4-way valve inversion error

When the heat exchange temperature
sensor (TE) exceeds 30°C or the suction
temperature sensor (TS) exceeds 50°C
during the heat pump operation.

O

×

1.Check the operation of the 4-way

valve unit or the coil characteristics.

2.Defect of the pulse motor valve.

3.Check the resistance value of the

heat exchange temperature sensor
(TE) and the suction temperature
sensor (TS).

4116

Check

code

Diagnostic functional operation

Determination and action

Number of

abnormalities

for

confirmation

Detailed

item

Operational cause

Backup
present

Automat

ic reset

89

P20

High pressure protection operatio n

When an abnormal stop occurs due to
the high pressure release control.
When the heat exchange temperature
sensor (TL) detects 63°C during the
cooling operation.
When the water outlet sensor (TWO)
detects 60°C during the heating or hot
water supply operation.

O

×

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 resistance value of the

heat exchange temperature sensor
(TL) and the water outlet
temperature sensor (TWO).

10 117

P22

Outdoor fan system error

When a DC fan rotor position detection
NG, element short circuit, loss of
synchronization, or abnormal motor
current occurs.

O

×

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%: single phase
type)
(AC380~400 V±10%: 3 phase type)

1-4 118

P26

Short circuit of the compressor driver
element error

When an abnormal short circuit of IGBT
is detected.

O

×

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.

8118

P29

Compressor rotor position error

The rotor position in the compressor
cannot be detected.

O

×

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.

8118

Check

code

Diagnostic functional operation

Determination and action

Number of

abnormalities

for

confirmation

Detailed

item

Operational cause

Backup
present

Automat

ic reset

90

Defect mode detected by the remote control

Check code

Diagnostic functional operation

Determination and action

Operational cause

Status of air-

conditioning

Condition

Not

displaying at

all

(cannot
operate by
the remote

control)

No communication between hydro
unit an remote controller

• The remote control wiring is not
connected correctly.

• The hydro unit has not been turned
on.

Stop – Defect in the remote control power

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.

E01

No communication between hydro
unit and remote controller

• Disconnection of the crossover
between the remote control and the
base unit of the indoor unit
(detected on the remote control
side).

Stop
(Automatic reset)

Displayed when
the abnormality
is detected.

Defect in the reception of the remote
control

1.Check the remote control crossover.

2.Check the remote control.

3.Check the hydro power supply wiring.

4.Check the water heat exchanger
board.

E02

Defect in the signal transmission
to the hydro unit.

(Detected on the remote control side)

Stop
(Automatic reset)

Displayed when
the abnormality
is detected.

Defect in the transmission of the remote
control

1.Check the transmitter circuit inside the
remote control.

… Replace the remote control.

E09

Several remote control base units

(Detected on the remote control side)

Stop
(The handset
continues)

Displayed when
the abnormality
is detected.

1.2 Check several base units with the

remote control

… The base unit is only one, and others

are handsets.

91

9-4. Diagnosis flow chart for each error code

9-4-1. Hydro unit failure detection

[A01] Error Pump flow determination

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

No

No

(Identify causes, and resolve)

(strainer)

Excess air noise

comes from inside

the pump

Flow switch is

connected to board

Built-in 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

Yes

[A01] occurs

Operation restarts

Water heat exchanger control board

is defective, replace it

Perform

air vent

Flow shortage

No (No pump sound)

No

Connect pump
connector to board

No

Replace flow switch

No

No

No

No

Yes

Flow switch is normal

Yes

Replace pump

Yes

Yes

No

Yes

Yes

92

[A02] Error Temperature rise and error short circuit

• If Boiler setting is ON (DPSW13-2 is ON) and FC62 is “1”, the A02 error is not detected.

Replace TWI, TWO,
and THO sensors

No

(TWI,TWO,THO 70°C)

TWI, TWO, and THO

sensor characteristics are

correct

Yes

No

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

No

Failure of backup heater
(Too large heater input,
thermostat short circuit)

Replace heater unit

Yes

Backup heater is energized

No

(Measure heater current)

Start

Replace water heat exchange control board

Yes

Flow switch is normal

No

Replace flow switch

93

[A03] Error Temperature rise and error short circuit

Replace TTW sensor

No

(TTW 85°C is detected)

TTW sensor

characteristic is correct

Yes

No

Hot water cylinder heater

is energized

Yes

No

At normal

temperature, tank thermostat

is energized

Yes

Replace hot water
cylinder thermostat

No

Hot water cylinder

thermostat operates

Yes

Operation
temperature 82°C

Start

Replace water heat exchange control board

Replace Mg-sw

No

Mg-sw (RY05) for

heater operates

Yes

Operating noise at normal time

94

[A04] Error Freeze prevention control

When the outside temperature or 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.

Excess air

inside pump

Secure water
circulation amount

Circulation
flow shortage

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

Set DP_SW11-1 to ON

No

No

No

No

(inside strainer, etc)

Chattering from

flow switch

Water heat

exchanger board DP_SW11-1

is ON

Power is

connect to backup

heater terminal

Backup

heater terminal has

230ACV ( ± 23V)

Start

Operation restart

Replace water heat

exchange control board

Perform

air vent

Set heater breaker to ON
Check indoor wiring

Replace flow switch

No

Yes

Yes

Yes

Yes

Replace backup heater unit

No

(Backup heater NG)

Backup

heater element

is conductive

Yes

Replace TC, TWO,
and TWI sensors

No

TC, TWO, TWI

sensor characteristics

are correct

Yes

Connect backup heater
power cable

Yes

(Refer to Charasteristic table on page 122)

95

[A05] Error Piping freeze prevention control

Water heat

exchange control board

DPSW11-1 is ON

Replace backup heater
and safety valve

Set water heat board
DPSW11-1 to ON

No
(Backup heater NG)

Backup heater terminal

has 220-230V (± 10%)

Power is connect to

built-in heater terminal

Yes

Yes

Restart

TWI 4, TWO 4, or

THO 4 is detected

Circulation pump keeps

being energized or 3 minutes

passed after the start

No

No

Place power cable for
backup heater

Set breaker for backup heater
to ON, or Check indoor
electronic wiring

No

Backup heater element

is conductive

Yes

Replace TWI, TWO,
and THO sensors

No

TWI, TWO, THO

sensor characteristics

are correct

Yes

Yes

Replace water heat

exchange control board

(Refer to Charasteristic table on page 122)

96

[A07] Error Pressure switch operation (Hot water supply/Heating 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

No

Excess air

noise comes from

inside pump

Chattering

noise comes from

flow switch

Start

No

No

Yes

Lower set temperature

Yes

Continued

operation at high outside air

temperature and at 50°C or higher

set temperature

No

Attach TWO sensor

No

TWO sensor

is attached

to pipe.

Yes

Replace pressure switch

No

Pressure switch

is normal

Yes

Yes

Yes

Replace water heat

exchange control board

97

[A08] Error Low pressure sensor lowering operation failure (Cooling/Defrosting
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

No

Excess air

noise comes from

inside pump

Chattering

noise comes from

flow switch

Start

No

No

Yes

Raise set temperature

Yes

(Cooling overload operation)

Continued

operation at low outside

temperature and at 15°C or lower

set temperature

No

Defrost outdoor unit
where frost remains

Yes

Defrosting

takes 15 mins or longer

(Frost remains)

No

Replace lo pressure sensor

No

Lo pressure sensor

is normal

Yes

Yes

Yes

Replace water heat

exchange control board

98

[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

No

No

Water cycle contains water

Yes

Flow switch is normal

Yes

No

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).

99

[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

No

Excess air

noise comes from

inside pump

Chattering

noise comes from

flow switch

Start

No

No

Yes

Attach TWI sensor

No

TWI sensor is

attached to pipe

Yes

Replace TWI or TWO sensor

No

TWI and TWO

sensor characteristics

are normal

Yes

Yes

Yes

Replace water heat

exchange control board