Toshiba HFC series Installation Manual

AIR TO WATER HEAT PUMP

Installation Manual

Hydro Unit

Model name:

HWS-P804XWHM3-E
HWS-P804XWHT6-E
HWS-P804XWHT9-E
HWS-P1104XWHM3-E
HWS-P1104XWHT6-E
HWS-P1104XWHT9-E

English

Hydro Unit

Please read this Installation Manual carefully before installing the Air to Water Heat Pump.

• This Manual describes the installation method of the hydro unit.

• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.

Installation Manual

REFRIGERANT

This Air to Water Heat Pump uses an HFC refrigerant (R410A) in order to prevent destruction of the ozone
layer.

Contents

1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Preparations for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5 Example of Hydro Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Main components of Hydro Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Hydro Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8 Start up and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

11 Sensor temperature monitoring function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

1-EN

–1–

Hydro Unit

1 General information

 System combination

Outdoor Unit

Hydro Unit HWS-P804HR-E HWS-P1104HR-E Backup heater

HWS-P804XWHM3-E – ~, 3kW

HWS-P804XWHT6-E – 3N ~, 6kW

HWS-P804XWHT9-E – 3N~, 9kW

HWS-P1104XWHM3-E – ~, 3kW

HWS-P1104XWHT6-E – 3N~, 6kW

HWS-P1104XWHT9-E – 3N~, 9kW

220-230V model

 General specifications

Installation Manual

Outdoor Unit

Single Phase model

Outdoor unit HWS-P804HR-E HWS-P1104HR-E

Power supply 220-230V ~ 50Hz

Type INVERTER

Function Heating & Cooling

Capacity (kW) 8.0 11.2

Heating

Cooling

Refrigerant R410A

Dimension HxWxD (mm) 1,340x900x320

Input (kW) 1.68 2.30

COP (W/W) 4.76 4.88

Capacity (kW) 6.0 10.0

Input (kW) 1.64 3.33

EER (W/W) 3.66 3.00

–2–

2-EN

Hydro Unit

Installation Manual

Hydro Unit

80 class

Hydro Unit HWS-P804XWHM3-E HWS-P804XWHT6-E HWS-P804XWHT9-E

Back up heater capacity 3.0 6.0 9.0

Power supply

Leaving water
temperature

for back up heater 220-230V ~ 50Hz 380-400V 3N~ 50Hz 380-400V 3N~ 50Hz

for hot water cylinder heater
(option)

Heating (°C) 20-60

Cooling (°C) 7-25

220-230V ~ 50Hz

112 class

Hydro Unit HWS-P1104XWHM3-E HWS-P1104XWHT6-E HWS-P1104XWHT9-E

Back up heater capacity 3.0 6.0 9.0

Power supply

Leaving water
temperature

for back up heater 220-230V ~ 50Hz 380-400V 3N~ 50Hz 380-400V 3N~ 50Hz

for hot water cylinder heater
(option)

Heating (°C) 20-60

Cooling (°C) 7-25

220-230V ~ 50Hz

Hot Water Cylinder (option)

Hot water cylinder (option)

Water volume (liter) 150 210 300

Power supply 220-230V ~ 50Hz

Max water temperature (°C) 75

Electric heater (kW) 2.7

Height (mm) 1,090 1,474 2,040

Diameter (mm) 550

Material Stainless steel

HWS-1501CSHM3-E

HWS-1501CSHM3-UK

HWS-2101CSHM3-E

HWS-2101CSHM3-UK

HWS-3001CSHM3-E

HWS-3001CSHM3-UK

2 Accessory parts

No. Parts name Quantity

1 Installation Manual (this document) 1

2 Owner’s Manual 1

Insulator for cooling

3-EN

3

5

Insulator

–3–

Hydro Unit

Installation Manual

3 Preparations for installation

 Parts required to connect this product (Common items)

Category Part Specification Quantity

Strainer (water filter) 1 1/4" 30 to 40 meshes 1

Water piping

Electrical system

 Options required for each function

Drain cock (for water charge) 1

Isolating ball valves

Earth leakage breaker for main power supply 30 mA 1

Earth leakage breaker for backup heater 30 mA 1

(Option)
Earth leakage breaker for hot water cylinder
heater

1 1/4"
for service 1 1/4"

30 mA 1

2

Purpose

Heating – –

Heating &Cooling (all
rooms)

Heating & Cooling
(partly heating only)

Hot water supply

2-zone control – –

Interlocking with boiler

In the Hydro Unit Purchased part

Part name Model name Part name Prescribed specification

– – Fan coil(s)

––

Hot water cylinder

150 L

210 L

300 L

Output control board
kit (1)

HWS-1501CSHM3-E

HWS-1501CSHM3-UK

HWS-2101CSHM3-E

HWS-2101CSHM3-UK

HWS-3001CSHM3-E

HWS-3001CSHM3-UK

TBC-PCIN3E Boiler

Radiator(s), Fan coil(s), Under
floor heating

Motorized 2-way valve (for
cooling)

Motorized 3-way valve
Earth leakage breaker

Motorized mixing valve

Circulator pump Other power supply

Buffer tank

Refer to “Control parts
specifications” on page 20.

Refer to “Control parts
specifications” on page 20.

Refer to “Control parts
specifications” on page 20.

Other power supply.
Signal 12 V input function is
required for boiler.

 Optional parts

No. Part name Model name Application Remarks

Boiler-linked output, Alarm output

1 External output board TCB-PCIN3E

2 External input board TCB-PCMO3E

Defrost signal output, compressor operation signal
output

Cooling/heating thermostat input

Emergency stop signal input.

Use specified products for the outdoor unit, Hydro Unit, and hot water cylinder.
Do not use commercially available products.
Use parts that conform to prescribed specifications for parts to be connected to the Hydro Unit.
If unspecified products or parts are used, a malfunction, failure or fire may be caused.

–4–

Up to two boards (according to
applications)

Up to two boards (according to
applications)

4-EN

Hydro Unit

Installation Manual

4 Precautions for safety

 General safety precautions

Ensure that all Local, National and International regulations are satisfied.

• Read the “Precautions for safety” carefully before installation.

• The precautions described below include the important items regarding safety – Observe them without fail.

• After the installation work has been completed, perform a test run to check for any problems. Follow the Owner’s
Manual to explain how to use and maintain the unit to the customer.

• Turn off the main power supply switch (or breaker) before unit maintenance.

• Ask the customer to keep the Installation Manual along with the Owner’s Manual.

 Refrigerant precautions

• If a refrigerant leak is suspected contact the dealer who supplied the system, in the case of a recharge of
refrigerant ask service personnel for details of the leak and confirmation of the repairs completed.
The refrigerant used in the system is harmless.

• Generally the refrigerant does not leak, however, if the refrigerant should leak into a room and a heater or stove
burner in the room is lit, toxic gas may be generated.

• Do not install the system in a location subject to a risk of exposure to a combustible gas.
If a combustible gas leaks and stays around the unit a fire may occur.

• Install the refrigerant pipe securely during installation and before operation.
If the compressor is operated with no pipe work connected and valves open the compressor will suck air which
would result in over pressurization of the system which may result in bursting or injury.
Observe the same precautions for refrigerant recovery work (pump back procedure to outdoor unit) and do not
disconnect pipe work until refrigerant is recovered and valves closed.

WARNING

Installation precautions

• Ask an authorized dealer or qualified installation professional to install/maintain the Air to Water Heat Pump System.
Inappropriate installation may result in water leaks, electric shock or fire.

• Electrical work must be performed by a qualified electrician in accordance with the installation manual.
An inappropriate power supply capacity or installation may result in fire.

• When completing any electrical works to the system ensure that all Local, National and International regulations are
satisfied.
Inappropriate grounding may result in electric shock.

• Ensure all electrical cables, used for the ESTIA installation, comply with all Local and National regulations. Check all
electrical terminations are secure and tight.

• Earth wire connections.

• Install an earth leakage breaker without fail.
Incomplete grounding can cause electric shock.
Do not earth wires to gas pipes, water pipes, lightning rods or telephone cable earth wires.

• This unit must be connected to the main power supply using a circuit breaker or switch with a contact separation of
at least 3 mm.

• Be sure to turn off all main power supply switches or the circuit breaker before starting any electrical work.
Ensure all power switches are off, failure to do so can cause electric shock.
Use an exclusive power circuit for the Air to Water Heat Pump system using the rated voltage.

• Ensure correct connection of interconnecting wire between Outdoor Unit and Hydro Unit.
Incorrect connection of the interconnecting cable may result in the damage of electrical parts.

• Ensure refrigeration system remains sealed to external gases and air.
Should air or other gases contaminate the refrigeration circuit, high system pressures could result in burst pipes and
injuries.

• Do not modify or bypass any of safety guards or switches in this system.

• After unpacking the outdoor unit, examine the unit carefully for any possible damage.

• Do not install in any place that might increase the vibration of the unit.

• To avoid personal injury (with sharp edges), be careful when handling parts.

5-EN

–5–

Hydro Unit

• Perform installation work properly in accordance with the installation manual.
Inappropriate installation may result in water leaks, electric shock or fire.

• Tighten all flare nuts with a torque wrench in the specified manner.
Excessive tightening of the flare nut may result in cracking of the pipe work or flare nut which may result in a
refrigerant leakage.

• Wear heavy duty gloves during installation work to avoid injury.

• Install the outdoor unit securely in a location where the base can sustain the weight adequately.

• In enclosed areas, if the refrigerant leaks during installation vacate and ventilate immediately.

• After installation is complete ensure and confirm that refrigerant does not leak.
If refrigerant leaks into a room and flows near a fire source noxious gas may be generated.

• Do not block any drain hoses. Hoses may come off and electric shocks may occur.

• Do not hit the manometer, because it is made of glass. It is breakable.

Installation Manual

 Notes on system design

• The inlet water temperature to the Hydro Unit must be 60°C or less.
Especially, be careful when there is an external heating source such as a boiler.
When hot water over 60°C returns, it may result in a failure of the unit or water leakage.

• The flow rate of the circulating water must meet the following range.
11 kW 18 L/minute or more
8 kW 13 L/minute or more
If the flow rate becomes less than the minimum, the protective device is activated to stop the operation.
To ensure the minimum flow rate of the water system, install a bypass valve on one water circuit. Please note
this circuit must contain a minimum of 20 liters. If total water amount is not enough, the unit may not function fully
due to protective operation.

• Do not drive water by power other than the pump built in the Hydro Unit.

• The back up heaters, in the hydro unit, are designed to assist the heat pump during periods of low ambient
conditions.

• Ensure the Hydro unit and the connecting water pipes are installed in a location that is not exposed to low
ambient temperatures which could result in the water circuit freezing.

• The system operation is designed around a closed water circuit. Do not use an open circuit design.

• Circulating water must be 20 liters or more.

• Please turn on the main power supply to up to 12 hours before the start of the operation, and don’t turn off the
power all the time during the period of use.

–6–

6-EN

Hydro Unit

Installation Manual

5 Example of Hydro Unit installation

 Example of installation for cooling and heating

When both cooling and heating modes are required a 2-way valve must be installed to isolate the radiator or under­floor heating circuit.

▼ Fig. 5-01

Strainer (40 mesh / 0.4 mm)

Drain Cock for water
Charge and Drain

Indirect Sanitary
Hot Water Cylinder

TTW

Isolating
Ball
Valves

M

Fan Coil Units
(Cooling or Heating)

Diverting 3-Way
Valve for
Sanitary Hot
Water Cylinder

2-Way

M

Valve

Use the 2­way valve to
isolate the
heating
circuit when
in cooling
mode.

2-Way

M

Valve

Radiators (Heating Only)
[2-Way Valve Control]

Use it when do not
operate cooling.

7-EN

Alternative to Radiators

Under-floor Heating
(Heating Only)
[2-Way Valve Control]

–7–

Hydro Unit

Installation Manual

 Example of 2-zone temperature control and hot water supply

system

The following shows an example of the 2-zone temperature control.
A buffer tank and a water pump are required for the 2-zone temperature control.

▼ Fig. 5-02

Hi-Pressure
By-Pass
Valve

Temperature
Regulating
Valve
(Mechanical)

TRV

Temp.
Regulating
Valve
(Mechanical)

Strainer (40 mesh / 0.4 mm)

Drain Cock for water
Charge and Drain

TTW

Isolating
Valves
(Service)

Diverting
3-Way
Valve for
Sanitary
Hot
Water
Cylinder

M

TRV

Zone 1

Fan Coil Unit (Heating
or Cooling)

Motorized 2-Way Valve
is required if fan coil

M

units are in cooling
operation.

Mixing 3-Way

M

Valve for Under
Floor Heating

External Pump for
Under Floor Heating

Indirect Sanitary Hot
Water Cylinder

–8–

TFI

Direct Buffer tank for
Under Floor Heating

Zone 2

Under-floor Heating
(2-Way Valve Control)

8-EN

Hydro Unit

6 Main components of Hydro Unit

 Exploded view and description for Hydro Unit

▼ Fig. 6-01

Installation Manual

1

2

3
4
5

6
7

8
9

10

1 : Expansion vessel
2 : Temperature sensor (for Heat pump outlet -TWO)
3 : Pressure sensor
4 : Heat exchanger
5 : Flow switch (13 L/min (8 kW), 18 L/min (11 kW))
6 : Temperature sensor (for refrigerant -TC)
7 : Temperature sensor (for water inlet -TWI)
8 : Drain nipple
9 : Water inlet connection
10 : Refrigerant liquid connection
11 : Air relief valve
12 : Pressure relief valve (0.3 MPa (3 bar))
13 : Thermal protector (auto)
14 : Temperature sensor (for water outlet THO)
15 : Thermal protector (Single operation)
16 : Water pump
17 : Backup heater (3 kW, 3 kW x 2, 3 kW x 3)
18 : Manometer
19 : Water outlet connection
20 : Refrigerant gas connection

11
12

13
14

15

16

17
18

19
20

9-EN

–9–

Hydro Unit

 E-box layout

▼ Fig. 6-02

Installation Manual

Main P.C. board

MCC-1511

Trans
former

External output
P.C. board MCC­1217 (Option)

External output
P.C. board MCC­1217 (Option)

Relay P.C. board
MCC-1431

Fuse

(

F9 F10

Relay

(RY06)

)

MG-SW (RY05)

Relay

(RY03)

Relay

(RY01)

Fuse

MG-SW (RY04)

MG-SW (RY02)

External input
P.C. board MCC­1214 (Option)

–10–

TB 07

TB07

10-EN

Hydro Unit

Installation Manual

7 Hydro Unit

installation

WARNING

• To protect yourself from injury, always use PPE
(Personal Protective Equipment), that is, wear gloves.

• Install the Hydro Unit by at least two persons.

• Install the Hydro Unit in a place strong enough to
withstand the following weights:
Hydro Unit weight with no water 60
(P1104)
Hydro Unit weight with full water 80
(P1104)

CAUTION

• Do not install the unit in a place where water freezes.

• Do not install the Hydro Unit in a place where
combustible gas may leak.

• Do not install the Hydro Unit in a place exposed to rain
or water.

• Do not install the Hydro Unit near equipment which
generates heat.

• Do not install the Hydro Unit to a movable object.

• Do not install the Hydro Unit in a place exposed to
vibration.

• The unit must be installed in accordance with national
wiring regulation.

• The Hydro Unit must not be installed in a high humidity
condition area.

kg (P804) 65 kg

kg (P804) 85 kg

 Positioning

Service space

Secure a service space for the Hydro Unit.

• Do not install the Hydro Unit in a place where heat
stagnates.

▼ Fig. 7-01

200 mm

100 mm

500 mm

350 mm

Mounting

Install M10 bolts at the positions shown below and
secure them with nuts.

▼ Fig. 7-02

380 mm

500 mm

M10

 Handling, unpacking, and

checking the Hydro Unit

• The unit should be checked when it is delivered, and
any damage reported immediately to the courier
claims the department.

960 mm

NOTE

If customer worried about vibration of ESTIA, please
insert vibration isolating material between the product
and the wall, when installing the product.

11-EN

–11–

Hydro Unit

Installation Manual

The Hydro Unit can be installed directly without using
the fixing angles.
However, the back side of the Hydro Unit can be highly
heated, therefore, the installing surface must be heat­resistant.

▼ Fig. 7-03

Remove the M5a screws to
detach the fixing angles.

▼ Fig. 7-04

380

▼ Fig. 7-05

M10

860

M10

 Refrigerant piping

WARNING

• THIS SYSTEM ADOPTS HFC REFRIGERANT
(R410A) WHICH DOES NOT DESTROY THE
OZONE LAYER.

• The characteristics of R410A refrigerant are: ease to
absorb water, oxidizing membrane or oil, and its
pressure is approximately 1.6 times higher that of
R22. Accompanied with the new refrigerant the oil has
also been changed. Therefore during installation work
prevention of the invasion of water, dust, former
refrigerant or oil is of a paramount importance.
To prevent the charging of incorrect refrigerants into
the system the service valve connection ports have
also increased in size.

• The use of R410A tools is required for correct
installation of the system.

• The use of the correct pipe sizes and wall thicknesses
of copper pipe work is required for the correct
installation of the system.

CAUTION

• Ensure all refrigerant pipes are protected from the
invasion of dust and water.

• Ensure all pipe work connections are tightened to the
required torque settings detailed in this section.

• Perform an air tight using Oxygen Free Nitrogen
(OFN) only.

• Evacuate the air in the pipe work using a vacuum
pump.

• Check for refrigerant gas leaks at all connections
throughout the pipe work.

Secure the Hydro Unit with
plain washers and nuts.

Install the Hydro Unit so that its tilting angle falls within
the range below.

▼ Fig. 7-06

± 1°

▼ Fig. 7-07

± 1°

NOTE

The Air to Water Heat Pump system uses R410A
refrigerant. It is important that copper pipes used for
refrigerant piping have the following wall thickness:

• 0.8 mm for Ø6.4 mm, Ø9.5 mm and Ø12.7 mm

• 1.0 mm for Ø15.9 mm

–12–

12-EN

Hydro Unit

Installation Manual

Refrigeration pipe

The length and height of the refrigeration pipe must be
within the following values.
As long as the Hydro Unit is installed within these
ranges, no additional refrigerant is required.

▼ Fig. 7-08

Outdoor unit

L

H

H: Max. ±30 m (above or below)
L: Max. 30 m

Min. 5 m

Refrigerant pipe sizes

Hydro Unit Model Gas Side (mm)

8 & 11 kW Hydro Unit Ø 15.88 Ø 9.52

Liquid Side

(mm)

Flaring

• Cut the refrigerant pipes to the correct length using a
pipe cutter. Remove any burrs that may be on the
pipes as these may cause refrigerant leaks or
component failure in the refrigeration cycle.

• Place the correct size flare nuts onto the pipes (use
the flare nuts supplied with the Hydro Unit or use
flare nuts designed specifically for R410A
refrigerant) and then flare the pipes using the correct
flaring tool.

Tightening

• Connect the refrigerant pipes, from the outdoor unit,
to the Hydro Unit as shown below.

▼ Fig. 7-09

Gas line Ø 15.88

Liquid line Ø 9.52

• Align the flare connection on each pipe with the
corresponding outlet connection on the Hydro Unit.
Tighten the flare nuts, using fingers, to secure the
pipes in place.

• Tighten the flare nuts, using a torque wrench, to the
tightening torques shown below:

Outer Ø of Copper Pipe

(mm)

9.5 33 to 42

15.9 63 to 77

Tightening Torque (N/m)

• To prevent damage, to the refrigerant pipes, use two
spanners to tighten the flare nut connections to the
required torque.

 Water pipe

13-EN

WARNING

• Install water pipes according to the regulations of
respective countries.

• Install water pipes in a freeze-free place.

• Make sure that water pipes have sufficient pressure
resistance.
The setting value of the pressure relief valve is 0.3
MPa. (3 bar)

CAUTION

• Do not use zinc plated water pipes. When steel pipes
are used, insulate both ends of the pipes.

–13–

Hydro Unit

Installation Manual

• The water to be used must meet the water quality
standard specified in EN directive 98/83 EC.

Water pipe

Design the water pipe length within the QH
characteristics of the pump (Refer to “Fig. 7-16” and “Fig.
7-17” on page 16).
The height of the pipe must be 7 m or less.

▼ Fig.7-10

H < 7 m

▼ Fig. 7-11

Attention
To avoid water leak,
exchange the seal
tapes to new one.

Attention
Water (used at test
in factory before
shipping) may be
found in the caps.

Hot water outlet
connection 1 1/4"

Water circuit

• Install a strainer with 30 to 40 meshes (locally
procured) at the water inlet of the Hydro Unit.

• Install drain cocks (locally procured) for water charge
and discharge at the lower part of the Hydro Unit.

• Make the piping route a closed circuit. (An open
water circuit may cause a failure.)

Water inlet connection
1 1/4"

▼ Fig. 7-12

Inlet

Isolating Ball Valve

Strainer (30 to 40
meshes)

Drain cock for
water charge
and discharge

–14–

Local arrangement

14-EN

Hydro Unit

0

Installation Manual

Piping to hot water cylinder (option)

Water supplied to the hot water cylinder is branched by
a motorized 3-way valve (locally procured).
For the specifications of the motorized 3-way valve,
refer to “Control parts specifications” on page 20.
Connect the hot water cylinder to port A (open when
energized) of the valve.

▼ Fig. 7-13

to hydro unit

room heating or cooling

Open when de­energized

B

to hot water cylinder

AB

A

Open when energized

Piping to 2-zone operation

To perform 2-zone temperature control, circulate water
by another pump (locally procured) through a
motorized mixing valve (locally procured) and a buffer
tank (locally procured).
For the specifications of the motorized mixing valve,
Refer to “Control parts specifications” on page 20.

▼ Fig. 7-14

Motorized mixing valve
(locally procured)

Water pump
(locally procured)

Zone
2

AB

A

B

from hydro
unit

Expression for expansion vessel selection

V: Necessary total tank capacity ( )

: Water expansion coefficient at each hot water

temperature
Vs: Total water amount in the system
P1: System pressure at tank setting position

(MPaabs.)

= water supply pressure = 0.3 (MPaabs.)

(recommended valve)
P2: Maximum pressure used during operation at tank

setting position (MPaabs.)

= safety valve setting pressure = 0.4 (MPaabs.)
* The absolute pressure value (abs.) is obtained by

adding the atmospheric pressure (0.1 MPa (1 bar))
to the gauge pressure.

▼ Tank selection method

Water temperature and expansion coefficient

Hot water

temperature

(°C)

0 0.0002 50 0.0121

4 0.0000 55 0.0145

5 0.0000 60 0.0171

10 0.0003 65 0.0198

15 0.0008 70 0.0229

20 0.0017 75 0.0258

25 0.0029 80 0.0292

30 0.0043 85 0.0324

35 0.0050 90 0.0361

40 0.0078

45 0.0100

Expansion

rate

Hot water

temperature

(°C)

Expansion

rate

15-EN

Buffer tank (locally

to hydro unit

procured)

Checking water volume and initial pressure
of expansion vessel

The expansion vessel of the Hydro Unit has a capacity
of 12 liters.
The initial pressure of the expansion vessel is

0.15 MPa (1.5 bar).
The pressure of the safety valve is 0.3 MPa (3 bar).
Verify whether the capacity of the expansion vessel is
sufficient using the following expression. If the volume
is insufficient, add the capacity locally.

–15–

▼ Fig. 7-15

18

16

14

12

10

8

6

4

2

0

0 50 100 150

Vs: Total water amount in the system( )

V: Necessary total tank capacity( )

250200 30

*In case the maximum hot water temperature is 60ºC

Install an external expansion vessel when the capacity
of the expansion vessel is insufficient.

Hydro Unit

Pump operation/configuration

▼ Fig. 7-16

Hydraulic heat exchanger (8 kW) QH characteristics

10

Installation Manual

Minimum flow rate

▼ Fig. 7-17

9

8

7

6

5

Head [m]

4

3

2

1

0

0 5 10 15 20 25 30 35

Hydraulic heat exchanger (11 kW) QH characteristics

10

9

8

7

6

Out of range

Pump duty

60 %

Out of range

Pump duty

100 %

Pump duty

Flow rate [L/min]

Minimum flow rate

Hydro unit QH­Characteristics (220/230 V)

80 %

Hydro unit QH­Characteristics (220/230 V)

Pump duty

100 %

5

Head [m]

4

3

Pump duty

2

1

0

0 1020304050

60 %

Pump duty

80 %

Flow rate [L/min]

–16–

16-EN

Hydro Unit

Installation Manual

Water charging

Charge water until the pressure gauge shows
recommended valve 0.2 MPa (2 bar).
Hydraulic pressure may drop when the trial run begins.
In that case, add water.
Air may enter if the charged hydraulic pressure is low.
Loosen the purge valve cap by two turns to release air.

▼ Fig. 7-18

Loosen 2
turns for
proper
venting

Loosen the air vent screw of the pump, pull out air in
the pump, and tighten again.
Loosen the cap of the pressure relief valve to release
air.
Water may come out of the pressure relief valve.
Release the air completely from the water circuit.
Failure to do so may disable correct operation.

 Electrical installation

WARNING

• Ensure electrical circuits are isolated before
commencing the electrical installation.

• The electrical installation must be completed by a
qualified electrician.

• The electrical installation must comply to all Local,
National and International electrical installation
regulations.

• This product must be earthed in accordance with
Local, National and International electrical installation
regulations.

CAUTION

• The Hydro Unit must be connected to a dedicated
power supply for the back up heater circuit.

• The electrical supply must be protected by a suitably
sized over current protection device (fuse, MCB etc)
and an earth leakage protection device.

• The Hydro Unit must be connected to the mains power
supply using a isolating switch which disconnects all
poles and has a contact separation of at least 3 mm.

• The cord clamps, attached to the Hydro Unit, must be
used to secure the electrical cables.

• Wrong connection of electrical cables may result in
electrical component failure or fire.

• Ensure the electrical cables are sized in accordance
with the installation instructions.

17-EN

Water quality

The water used must satisfy EN directive 98/83 EC.

Piping insulation

It is recommended that insulation treatment be applied
to all pipes. To perform optional cooling operation,
apply insulation treatment of 20 t or more to all pipes.

–17–

Hydro Unit

Control line

▼ Fig. 7-19

Installation Manual

Pump (local)

Max 12 m
230 V 100 mA

0.75 mm² or more

Booster heater
(local)

Max 12 m
230 V 1 A

0.75 mm² or more

2Way-Valve for
cooling stop

Max 12 m
230 V 1 A

0.75 mm² or more

3Way-Valve for hot
water cylinder

Mixing-Valve
type 2 for 2 zone
control

4

2

3

1

TB04

1
2

3
4

TB05

5
6

7
8

CN208

OPTION OPTION

9

PJ20

2

1

3

Mixing-Valve type 1
for 2 zone control

N

CW

4

2

3

1

TB06

TB07

1
2

CN209

PJ20

2

1

4

3

Max 12 m
230 V 100 mA

0.75 mm² or more

Max 5 m shielded wire

0.75 mm² or more

CCW

A
B

C
D

Temp sensor for
2 zone control

2nd remote controller

4

Temp sensor in hot
water cylinder

A
B

Max 5 m shielded
wire 0.75 mm² or
more

Max 50 m shielded wire

0.50 mm² or more

Max 12 m non
voltage 0.75 mm² or
more

▼ Fig. 7-20

TB03

TB01

Alert output
(local)

Boiler operation
(local)

Defrost output
(local)

Compressor
operation output
(local)

3WV

1

11 12

2

TB 01

59

3

13

43

41

42

MIXV

TB 04

31 32

HOT WATER CYLINDER

Hot
water
cylinder

44

L

N

TB 03

Input power
220-230 V ~
50 Hz

L3

N

L2L1

L

N

TB 02

Input power
220-230 V ~
50 Hz

TB02

L3

L1 L2

Input power
380-400 V 3N
~ 50 Hz

N

55

53

51

52

WPM

TB 05

TTW

54

2WV

6B6A 6D

6C

TF1

TB 06

565758

BH

Don't apply
220-240V
or
breakdown
will occur.

to Outdoor unit

Sensor
connection

Outdoor unit
connection

Hot water cylinder
power supply

–18–

Backup heater
power supply

18-EN

Hydro Unit

Installation Manual

Electrical supply/cable specifications

▼ Wiring specifications

Description

Outdoor
unit
power

Hydro
inlet
heater
power

Outdoor-Hydro unit Connection 1.5 mm² or more , ,

Hydro -Cylinder Connection 1.5 mm² or more , TB03

Power
input

Power
input for
backup
heater

Power input for cylinder
heater

Model name
HWS-

P1104HR-E

P804HR-E

P1104XWHM3-E

P1104XWHT6-E

P1104XWHT9-E

P804XWHM3-E

P804XWHT6-E

P804XWHT9-E

POWER
SUPPLY

220-230 V ~
50 Hz

220-230 V ~
50 Hz

220-230V ~
50Hz

380-400V 3N~
50Hz

380-400V 3N~
50Hz

220-230V ~
50Hz

380-400V 3N~
50Hz

380-400V 3N~
50Hz

220-230V ~
50Hz

Maximum
current

22.8 A 25 A 2.5 mm² or more

22.8 A 25 A 2.5 mm² or more

13 A 16 A 1.5 mm² or more ,

13 A(13 A x 2P) 16 A 1.5 mm² or more

13 A(13 A x 3P) 16 A 1.5 mm² or more

13 A 16 A 1.5 mm² or more

13 A(13 A x 2P) 16 A 1.5 mm² or more

13 A(13 A x 3P) 16 A 1.5 mm² or more

12 A 16 A 1.5 mm² or more

Installation
fuse rating

Power wire Connection destination

,

, ,
,

,

, ,
,

,

TB02

TB03

▼ Wiring specifications (control line)

Description Line spec

Maximum
current

Maximum length

3-way valve control 2 line or 3 line 100 mA 12 m 0.75 mm² or more

2-way valve control 2 line 100 mA 12 m 0.75 mm² or more , (TB05)

Mixing valve control 3 line 100 mA 12 m 0.75 mm² or more

2-zone thermo sensor 2 line 100 mA 5 m 0.75 mm² or more , (TB06)

Cylinder thermo sensor

2+GND(shielded
wire)

100 mA 5 m 0.75 mm² or more , (TB06)

Second remote controller 2 line 50 mA 50 m 0.5 mm² or more , (TB07)

Connection
destination

, ,

(TB05)

, ,

or

, ,

(TB04)

19-EN

–19–

Hydro Unit

▼ Control parts specifications

Power Maximum current Type

Motorized 3-way valve
(for hot water)

Motorized 2-way valve
(for cooling)

Motorized mixing valve
(for 2-zone)

AC 230 V 100 mA

AC 230 V 100 mA spring return type (normally open)

AC 230 V 100 mA

▼ Output line specifications

Installation Manual

Default: 2-wire spring return valve or 3 wire SPST valve
Note: 3 wire SPDT valve can be used by changing DIP switch

13_1.

Default: Drive time = 60sec to 90°
Note: 3 wire SPST or SPDT valves, with drive times between
30 and 240 seconds, can be used. Valve drive time can be
changed using function code 0C

Description Output

External pump No.1 AC230V 1 A – 12 m

External boost heater AC230V 1 A – 12 m

Boiler control

ALARM Output

Compressor operation
output

Defrost Output

Non-voltage
contacts

Non-voltage
contacts

Non-voltage
contacts

Non-voltage
contacts

Maximum
current

0.5 A AC230 V 12 m Output as required when outdoor air

1 A DC24 V 12 m

0.5 A AC230 V 12 m

1 A DC24 V 12 m

0.5 A AC230 V 12 m

1 A DC24 V 12 m

0.5 A AC230 V 12 m

1 A DC24 V 12 m

Max
voltage

Maximum
length

Output as required when outdoor air
temperature is -20°C or less

temperature is -10°C or less. The
outdoor air temperature, when the
boiler output is enabled, can be
changed using function code 23.

▼ Input line specifications

Description Input Maximum length

Emergency stop control Non-voltage 12 m

Cooling thermostat input Non-voltage 12 m

Heating thermostat input Non-voltage 12 m

CAUTION

Earthing arrangements

The Hydro Unit and related equipment must be earthed in accordance with your local and national electrical regulations.
It is essential that the equipment is earthed to prevent the electric shock and damage to the equipment.

–20–

20-EN

Hydro Unit

▼

Installation Manual

Electrical connection to hydro unit

• Remove the front cover and the electrical box cover
from the Hydro Unit.

• The Hydro Unit power cable must be sized in
accordance with refer to “Electrical supply/cable
specifications”.

• Connect the Hydro Unit power cable to Terminal 02
as shown below.

Fig. 7-21

Backup heater
220-230V ~ type
(3 kW type)

Input power
220-230V
50Hz

Leakage
breaker
30mA

L N L1 L2 L3 N

• Ensure the Hydro Unit power cable is secured using
the cable clamp fitted in the electrical box.

• Ensure the Hydro Unit power cable connection
terminals are tight.

Backup heater
380-400V 3N~
type
(6,9 kW type)

Input power
220-230V 3N~
50Hz

Leakage
breaker
30mA

TB02TB02

Outdoor unit to hydro unit electrical
connection

▼ Fig. 7-22

1

Input
power
220­230V~
50Hz

Leakage
breaker
30mA

L

N

Outdoor unit Hydro unit

• Ensure electrical circuits are isolated before
commencing work.

• The Outdoor Unit to Hydro Unit interconnecting
cable must be sized in accordance with refer to
“Electrical supply/cable specifications”.

• Connect the Outdoor Unit to Hydro Unit
interconnecting cable as shown in the diagram
above.

• Ensure the Outdoor Unit to Hydro Unit
interconnecting cable is secured using the cable
clamp fitted in the electrical box.

• Ensure the Outdoor Unit to Hydro Unit
interconnecting cable connection terminals are tight.

1

2

2

TB01

3

3

21-EN

–21–

Hydro Unit

Installation Manual

Electrical connection for external booster
heater

CAUTION

• The maximum current available from the
booster heater output is 1
the booster heater directly to Terminal Block
05 on the Hydro Unit. A separate contactor,
supplied locally, must be used to supply the
booster heater.

• The booster heater can be installed only for room
heating and cannot be used for hot water supply.

• Install the booster heater downstream of the 3-way
valve on the indoor unit side.
The booster heater is an external heater, supplied
locally, used to assist the Hydro Unit during low
ambient conditions.

• The AC230
be used to energize an external contactor. (Supplied
locally)

• The output from the Hydro Unit is only enabled when
the outdoor air temperature is less than -20°C.

• Ensure the external booster heater is installed and set
up in accordance with all Local, National and
International regulations.

V 1 A output from the Hydro Unit must only

• Connect the external booster heater to the Hydro
Unit in accordance with the diagram shown below.

• Connect the coil, of the field supplied contactor, to
terminals 5 & 6 on Terminal Block 05. The contactor
will energize in the event of low ambient conditions.

• A separate dedicated electrical supply must be used
for the external booster heater. This must be
connected through the contacts on the field supplied
contactor.

A. Do not connect

Electrical connection for external additional
pumps

• The Hydro Unit has the facility to connect an
additional circulating pump, if required, into the
heating or cooling system.

• There is an output available from the Hydro Unit.
AC230 V 1 A (maximum) is available from each
output. The output for each additional pump is
synchronized with the operation of the main
circulating pump inside the Hydro Unit.

• Connect the additional pumps as shown in the
diagram below.

• Connect external pump 1 to terminals 1 & 2 on
Terminal Block 05.

• Install external pumps so that their motive power
does not affect the internal pump.

▼ Fig. 7-24

Pump

01

Terminal Block 05

1234567 8 9

▼ Fig. 7-23

Booster Heater

1234567 8 9

Terminal Block 05

–22–

22-EN

Hydro Unit

Installation Manual

3-way valve (diverter) connection

Required Valve Specification:

Electrical Specification: 230 V; 50 Hz; <100 mA
Valve Diameters: Port A, Port B: Ø 1 1/4"
Return Mechanism: 3 types of 3-way valve (diverter)
can be used.
Set the 3-way valve in use with the DIP switch SW13­1 on the Hydro Unit board.

SW13-1

Type 1 2-wire spring return OFF

Type 2 3-wire SPST OFF

Type 3 3-wire SPDT ON

NOTE

Continuous operation of the valve motor at the fully
open position is not recommended.

• The 3-way diverter valve is used to select either
domestic hot water or space heating.

• Connect the 3-way diverter valve to terminals 7, 8
and 9 on Terminal Block 05.

• Connect the 3-way diverter valve in accordance with
the diagram below:

▼ Fig. 7-25

Type 1: SPRING RETURN

port “A” to Hot water
cylinder

Hydro Unit

▼ Fig. 7-26

Type 2: SPST

port “A” to Hot water
cylinder

port “AB” to
Hydro unit

▼ Fig. 7-27

Typ e 3: SPDT

port “AB” to
Hydro unit

port “A”
close

port “B” to Room heating
or cooling

port “A” to Hot water
cylinder

port “A”
close

open

open

Hydro Unit

TB 05

7

8

9

Hydro Unit

TB 05

7

8

9

port “AB” to
Hydro unit

port “A” open

port “B” to Room heating
or cooling

7

8

9

TB 05

port “B” to Room heating
or cooling

23-EN

–23–

Hydro Unit

Installation Manual

3-way mixing valve connection

Required Actuator Specification

Electrical Specification:230 V; 50 Hz; <100 mA
The 3-way mixing valve is used to achieve the
temperature differential needed in a 2-zone heating
system.

• Connect the 3-way mixing valve to terminals 2, 3 and
4 on Terminal Block 04 (for Type 1 mixing valve) or
on terminals 1, 2 and 3 on Terminal Block 04 (for
Type 2 mixing valve).

• Connect the 3-way mixing valve in accordance with
the diagrams below:

▼ Fig. 7-28

Type 1: SPDT

port “A” to Zone 2 Heating

port “AB” to
Hydro unit

open

Hydro Unit
TB 04

1

2

3

port “A”
close

4

Hot water cylinder connection (optional)

• Please refer to “Electrical supply/cable
specifications” for fuse/cable size and for
connection details.

Electrical Connection (Hot Water Cylinder
Electric Heater)

• The electric heater, incorporated in the hot water
cylinder, requires a separate supply to Hydro Unit.

• Connect the hot water cylinder heater electrical
supply in accordance with shown below:
Live conductor: Terminal L on Terminal Block 03
Neutral conductor: Terminal N on Terminal Block 03
Earth Conductor: Earth terminal on Terminal Block
03

• Connect the hot water cylinder heater to the Hydro
Unit as shown below:
Live conductor to hot water cylinder: Terminal 1 on
Terminal Block 03
Neutral conductor to hot water cylinder: Terminal 2
on Terminal Block 03
Earth conductor to hot water cylinder: Earth terminal
on Terminal Block 03

▼ Fig. 7-30

Earth leakage breaker

INPUT Power
220-230 V ~
50 Hz

port “B” BLANK OFF

▼ Fig. 7-29

Type 2: SPST

port “A” to Zone 2 Heating

port “AB” to
Hydro unit

port “B” BLANK OFF

port “A”
close

open

Hydro Unit
TB 04

1

2

3

4

2

1

Hot water
cylinder

12 LN

Terminal block 03

–24–

24-EN

Hydro Unit

Installation Manual

Electrical Connection (Hot Water Cylinder
temperature Sensor)

• Connect the hot water cylinder temperature sensor
as shown below to terminals A & B on Terminal
Block 06 in the Hydro Unit.

• Please ensure that the interconnecting cable,
between the Hydro Unit and the hot water cylinder, is
connected to earth at both ends of the cable using
the shield wire.

▼ Fig. 7-31

Additional hydro unit outputs

Alarm and Boiler Outputs

Alarm Output: L1: Alarm output

• Output enabled when the system is in alarm/fault
condition.

• Volt free contact - specification shown below:
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)

• Connection details: Terminals 1 and 2
(OPERATION) on MCC-1217 TB (Refer to “Fig. 7­32”)

Boiler Control Output: L2: Boiler drive permission
output

• Output enabled when outdoor ambient temperature
<-10°C

• Volt free contact - specification shown below:
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)

• Connection details: Terminals 3 and 4 (EMG) on
MCC-1217 TB (Refer to “Fig. 7-32”)

▼ Fig. 7-32

Connection Cable

Hydro unit

Power
Supply

L2

Power
Supply

L1

Locally procured

Boiler
control
output

Alarm
output

CN208

Hydro unit
main control
board

TCB-PCIN3E

Display
Relay K1

PJ20

OPERATION

Display
Relay K2

EMG

4

3

2

1

Defrost and Compressor operation Outputs

Defrost output

• Display relay is ON when the system defrost.

• Volt free contact
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)

• Connection details: Terminals 1 and 2
(OPERATION) on MCC-1217 TB (Refer to “Fig. 7­33”)

25-EN

–25–

Hydro Unit

Installation Manual

Compressor operation output

• Display relay is ON with outdoor unit compressor
operation.

• Volt free contact
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)

• Connection details: Terminals 3 and 4 (EMG) on
MCC-1217 TB (Refer to “Fig. 7-33”)

▼ Fig. 7-33

Connection Cable

CN209

Hydro unit
main control
board

TCB-PCIN3E

Display
Relay K1

PJ20

OPERATION

Display
Relay K2

EMG

4

3

2

1

Power
Supply

L2

Power
Supply

L1

Locally procured

Compressor
operation
output

Defrost
output

*1:Available to change the output signal by function

code 67.

Default (FC67 = 0) Setting value (FC67 = 1)

1 - 2 = Defrost output
3 - 4 = Compressor

operation output

1 - 2 = Alarm output
3 - 4 = During operation

Optional inputs to hydro unit

Room Thermostat Input:

2–3: Room thermostat input for cooling mode
1–3: Room thermostat input for heating mode

• Output enabled when either heating or cooling mode
selected on room thermostat. (locally supplied)

• Volt free contacts

• Connection details:
Cooling Connection: Terminals 3 (COM) and 2
(COOL) on MCC-1214TB (Refer to “Fig. 7-34”)
Heating Connection: Terminals 3 (COM) and 1
(HEAT) on MCC-1214TB (Refer to “Fig. 7-34”)

▼ Fig. 7-34

*1

CN211

Thermostat operation

2 - 3 open close – –

1 - 3 – – close open

TCB-PCMO3E

COM

3

PJ17

COOL

HEAT

2

1

Connection
Cable

Cooling Heating

on off on off

Locally procured
Thermostat

Cool

Hot

CAUTION

• Be sure to prepare a non-voltage contact for each
terminal.

• Display Relay capacity of “EMG” and “OPERATION”.
Below AC230 V 0.5 A (COS
When connecting loads such as relay coil to “L1, L2”
load, insert noise surge absorber.
Below DC24 V 1 A (Non-inductive load)
When connecting load such as relay coil to “L1, L2”
load, insert the bypass circuit.

Ø = 100 %)

CAUTION

• Be sure to prepare a non-voltage continuous contact
for each terminal.

• Supplementary Insulation must be added to user
touchable part of switches.

–26–

26-EN

Hydro Unit

Installation Manual

Emergency Shutdown input

S2: Emergency stop input, Tempo* control input
This function can be switched over with FC21 and
FC61.

• Non-voltage contacts

• Connection details:
Emergency stop, Tempo* control ON: Terminals 3
(COM) and 1 (HEAT) on MCC-1214TB (Refer to
“Fig. 7-35”)

* a price contract provided by French electric power

company EDF

Hot water tank thermostat input

S1: Local hot water tank thermostat input
This function is used with DIP switch 2_3 is “ON”, when

the customer use the local hot water tank.
* Close: Not reached setting temperature.
* Open: Reached setting temperature.

(Refer to “Fig. 7-35”)

Control of force stop and restart

S1: Hot water supply control
S2: Heating control

• This function is valid only when DIP switch 2_3 is
“OFF”, FC61 is set to “3” and FCB6 is set to “1”.

• Operation by external input can be switched over
with FC52.

▼ Fig. 7-35

TCB-PCMO3E

CN210

Connection Cable

PJ17

COM

3

2

1

Locally procured

S2S1

Earth continuity test

On completion of the electrical installation a resistance
test should be completed on the earth conductor to
ensure continuity between all pieces of equipment on
the earth conductor.

Insulation resistance test

This test must be completed using a 500 V D.C.
insulation resistance tester. Insulation resistance tests
should be completed between each live terminal and
earth.

 Second remote controller

Installation place

• Install the remote controller 1 m - 1.5 m above floor
level (average room temperature area).

• Do not install the remote controller in a place
exposed to direct sunlight or outside air (such as a
window, etc.).

• Do not install the remote controller where ventilation
is poor.

• Do not install the remote controller in a freezing or
refrigerated area - the remote controller is not water
or splash-proof.

• Install the remote controller in a vertical position.

Remote controller installation dimension

Be sure to follow the installation dimension as shown in
the figure 1 when you install the remote controller on
the wall.

(mm)

120

62

18

27-EN

CAUTION

• Be sure to prepare a non-voltage continuous contact
for each terminal.

• Supplementary Insulation must be added to user
touchable part of switches.

Electrical safety checks

The electrical safety checks must be completed before
turning on the electrical supplies to the Air to Water
heat pump system. The electrical safety checks should
be completed by a qualified electrician. All results
measured should comply with your local/national
electrical installation regulations.

–27–

120

84

Hydro Unit

Installation Manual

Remote controller installation

NOTE

• The remote controller wire should not be bundled
with other wires (mains, etc.), or installed with other
wires in the same conduit, as malfunction may
result.

• Install the remote controller away from sources of
electrical interference and electromagnetic fields.

• If electrical interference is unavoidable,
countermeasures such as appropriate filtering
should be employed.

<Remote controller
(Rear)>

Wiring slot

Wood screws

Remote controller wiring

Connection diagram

*Use 0.5 mm
* Can not use the closed end

wire joint.

Wood screws

A

B

Terminal block
(TB07) for remote
controller wiring in
Hydro unit

* Terminals A and B are non-

polar.

2

wire

Remote controller

A

B

Remote controller wiring
(Locally procured)

Second remote controller installation
requirements

Remote controller

Cover

Lower case
(Rear case)

1. For removal of the remote controller’s lower
case (rear case), insert the tip of a straight blade
screwdriver, or the like, into the two openings at
the bottom of the remote controller to open the
lower case.

2. Fix the remote controller’s rear case by wood
screws (2 pcs.). Do not over tighten, as it may
damage the rear case.

3. Connect the wires from the Hydro unit to the
remote controller terminal block.
(Refer to “How to wire the remote controller”.)
Connect the wires of the remote controller
following the terminal numbering convention of
the Hydro unit to prevent miss wiring. (Do not
apply AC 208-230V mains voltage to the remote
controller as it will be damaged.)

Remote controller
(inside, rear)

DIP switch DIP switch DIP switch

Header remote
controller/Hot
water
temperature

DIP switch

Header remote
controller/
Room
temperature

Second remote
controller/Hot
water
temperature

Second remote
controller/
Room
temperature

Installation

For a dual remote controller system, install the remote
controllers in the following way.

1. Set one of remote controllers as the header
remote controller. (Remote controller of hydro
unit is preset as Header (DIP SW1 = OFF).)

2. Set the DIP switch on all other remote controller
P.C. boards to Second. (Optional remote
controller is preset as Second (DIP SW1 = ON).)

–28–

28-EN

Hydro Unit

• Set DIP SW2 to ON (Room temperature) on the
remote controller which you will control the room
temperature with.
DIP SW2 of optional remote controller is preset to
ON (Room temperature).
Either one of header or second remote controller
must be set as room temperature control.

• To control room temperature instead of water
temperature with this remote controller, set function
code “40” of hydro unit to “1”.

8 Start up and configuration

Set the DIP switches and function codes.

 Setting DIP switches on the board in the Hydro Unit

Installation Manual

• Detach the front cover and the electrical control box cover of the Hydro Unit.

• Set the DIP switches on the main board.

▼ Fig. 8-01

ON

OFF

SW No. DIP No. Description Default

Boiler install location

1

OFF = Heating side after 3 way valve
ON = Before 3 way valve

2 Not Used – – – – –

Used to when an external cylinder thermostat is

02

10

connected

3

OFF = No external cylinder thermostat;
ON = External tank thermostat connected

Used to when an external room thermostat is
connected

4

OFF = No external room thermostat;
ON = External room thermostat connected

P1 Pump operation for hot water

1

OFF = synchronised with heat pump
ON = Normally run

P1 Pump operation for heating

2

OFF = Normally run
ON = Stopped at the outside temperature over 20°C

Synchronisation of Pump P2.
OFF = P1 synchronised with pump P1

3

ON = P2 continuous operation (pump off when
remote controller switched off)

Pump P1 power of regular, When long-term thermo­off.

4

OFF = None operation
ON = regular power

SW10 SW11 SW12 SW13

ON

1

ON

4

3

2

3

2

1

ON

4

1

OFF

OFF

OFF

OFF

OFF

OFF

OFF

4

3

2

After

Commissioning

ON

4

3

2

1

Change 1 Change 2 Change 3

29-EN

–29–

Hydro Unit

Installation Manual

SW No. DIP No. Description Default

Used to activate Hydro Unit back up heaters.

1

11

12

13

OFF = Back up heaters activated;
ON = back up heaters de-activated

Used to activate hot water cylinder electrical heater.

2

OFF = hot water cylinder heater activated;
ON = hot water cylinder heater de-activated

Used to activate external booster heater output.

3

OFF = external booster heater output activated;
ON = external booster heater output de-activated

4 Not Used – – – – –

Used when a hot water cylinder is connected to
system.

1

OFF = hot water cylinder connected;
ON = hot water cylinder not connected

Used to activate Zone 1 Operation.

2

OFF = Zone 1 activated;
ON = Zone 1 de-activated

Used to activate Zone 2 Operation.

3

OFF = Zone 2 de-activated;
ON = Zone activated

4 Not Used – – – – –

Used to determine type of 3 way diverting valve
used on system.

1

OFF = 2 wire/spring return or SPST type valve;
ON = SPDT type valve

Used to activate external boiler output.

2

OFF = external boiler output de-activated;
ON = external boiler output activated

Used to activate system auto restart after power
failure.

3

OFF = auto restart activated;
ON = auto restart de-activated

4 Not Used ON – – – –

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

After

Commissioning

Change 1 Change 2 Change 3

 Setting DIP switches on the board in second remote controller

(option)

• Detach the front cover of the Remote controller.

• Set the DIP switches on the main board

DIP No. Description Default

Used to when a second remote controller is connected

1

OFF=Header remote controller; ON=Second remote
controller

Used to determine control target when use second
remote controller

2

OFF=water temperature;
ON=room temperature

3 Not Used – – – – –

4 Not Used – – – – –

OFF – –––

OFF – –––

After

Commissioning

Change 1 Change 2 Change 3

–30–

30-EN

Hydro Unit

Installation Manual

 Setting function codes for

Hydro Unit and remote
controller

Set function codes for various operation modes with
the remote controller.

There are two types of setting.

1) Hydro Unit function code setting

2) Remote controller function code setting

Setting remote controller mode

<Setting Hydro Unit Function Code>

1 Press the TEST + SET + SELECT

buttons for four seconds or more
to enter the remote controller function code
setting mode.

2 Set the function code (CODE No.) with the

TEMP. buttons. (CODE No.: 01 to

13)

3 Set data (DATA) with the TIME

buttons.

4 Press the SET button to determine the

settings.

5 The CL button is enabled only before the

SET button is pressed and the function
code is changed.

6 Press the TEST button to end the

settings.

2 Set the function code (CODE No.) with the

TEMP. buttons. (CODE No.: 01 to

91)

3 Set data (DATA) with the TIME

buttons.

4 Press the SET button to determine the

settings.

5 The CL button is enabled only before the

SET button is pressed and the function
code is changed.

6 Press the TEST button to end the

settings.

<Setting Remote controller Function Code>

1 Press the TEST + CL + TEMP.

buttons for four seconds or more to enter
the remote controller function code setting
mode.

31-EN

–31–

Hydro Unit

Installation Manual

Main setting items

(1) Setting Temperature Range (function code 18 to

1F)

• Set the temperature range for heating (zone 1,
zone 2), cooling, and hot water.

• The upper-limit and lower-limit temperatures of
each mode can be set.

(2) Setting Heat Pump Operation Conditions for Hot

Water Supply (function code 20 and 21)

• Set the heat pump start water temperature and
heat pump stop water temperature.

• The heat pump starts working when the water
temperature lowers below the set start water
temperature. It is recommended that the default
value be used.

(3) Compensating Hot Water Temperature

(function code 24 and 25)

• Compensate the target temperature from the
remote controller set temperature when the hot
water temperature lowers below the set outside
air temperature.

(4) Setting Hot Water Boost (function code 08 and

09)

• Set the control time and target temperature
when the HOT WATER BOOST button
on the remote controller is pressed.

(5) Setting Anti-Bacteria

• Set the control for the hot water cylinder when
ANTI BACTERIA is set with the remote
controller.

• Set the target temperature, control period, start
time (24-hour notation), and target temperature
retention period.

• Make this control setting according to
regulations and rules of respective countries.

(6) Setting Priority Mode Temperature

• Set the outside air temperature that changes the
preferred operation mode.

• Hot Water - Heating Switching Temperature
Heating operation takes precedence when the
temperature lowers the set temperature.

• Boiler HP Switching Temperature
When the temperature lowers the set
temperature the external boiler output is made.

(7) Setting Heating Auto Mode Temperature

(function code 27 to 31, A1 to A5)

• Compensate the target temperature when Auto
is set for temperature setting on the remote
controller.

• The outside air temperature (T0, T1 and T3) can
be set individually.

• The target temperature can be set to a value
from 20 to 60°C.

• However, A > B > C > D > E.

▼ Fig. 8-02

<Zone 1>

Default setting

(FC2C)

(FC2D)

(FC2E)

(FC2F)

(FC30)

(40)

(35)

(30)

(25)

(20)

A

B

C

D

E

T0 T1 T2

(-20)

(FCA1) (FC29) (FC2B)

Outdoor Temperature (°C)

(-10)

Auto curve shift
adjust ± 5°C (FC27)

0

T3

(10)

20-25

• The entire curve can be adjusted plus and minus
5°C by function code 27.

<Zone 2>

You can choose either a percentage or a fixed
value as the setting method of zone 2

FCA2 = “0” : percentage (FC31)
FCA2 = “1” : fixed value (FCA3), (FCA4), (FCA5)

However, zone 1 ≥ zone 2

Auto curve shift

(FCA3)

(FCA4)

(FCA5)

(40)

(35)

(20)

A’

B’

E’

T0 T1 20-25

(-20)

(FCA1) (FC29)

Outdoor Temperature (°C)

(-10)

adjust ± 5°C (FC27)

(8) Setting Frost Protection Temperature (function

code 3A to 3B)

• Set the function when the FROST
PROTECTION button on the remote
controller is pressed.

• Set enabling/disabling of this function and the
target water temperature.

• If disabling is set, the frost protection operation
is not performed even when the FROST
PROTECTION button is pressed.

(9) Setting Frequency of Output to Internal Heater

(function code 33 to 34)

• The increase/decrease time is used to set the
response time.

–32–

32-EN

Hydro Unit

Installation Manual

(10)Setting Night Setback (function code 26.

remote controller function code 0E to 0F)

• Set the function when the NIGHT
button on the remote controller is pressed.

• Set enabling/disabling of this function, reduction
temperature, start time, and end time.

• If disabling is set, the night setback operation is
not performed even when the NIGHT
button is pressed.

(12)Hydro 2-Way Diverting valve operation. control

• When using both cooling and heating operations
and there is an indoor unit only for heating (such
as floor heating), install the 2-way valve and set
this function code.

(13)Setting 3way Valve Operation (function code

54)

• This setting is not necessary for normal
installation. Make this setting to invert the logic
circuit in case ports A and B of the 3-way valve
are wrongly attached and it cannot be rectified
on site.

(14)Mixing valve operation setting

• Set the time period from full close to full open of
the 2-zone control mixing valve. Set a value that
is 1/10 of the actual time. And. setting the
interval control time. (minutes)

(15)Setting Heating/Hot Water Switching when

Boiler Is Used (function code 3E)

• When boiler is used, make this setting to operate
the Hydro Unit by the instruction from the boiler.

(16)Setting Heat Pump Operating Time for Hot

Water Supply Operation

• Set the time period from the start of heat pump
run to the start of heater energization at the
beginning of hot water supply operation. If a long
period is set, it takes long time for heating water.

(17)Setting Cooling ON/OFF

• Set this function when performing cooling
operation.

(18)Remote controller time indication

• 24-hour or 12-hour notation is selected for the
timer.

(19)Setting Nighttime Quiet Operation

• Issue an instruction for low-noise mode
operation to the outdoor unit. Enabling/disabling
of this function, start time, and end time can be
set.

(20)Setting Alarm Tone

• The remote controller alarm tone can be set.

(21)Second Remote controller and room

temperature thermostat

• Set the initial temperature setting.

(22)Selection of mode of operation by external

input

• Select the logic of an external input signal
(option)

(23)Hydro Unit Capacity setting

(24)Second Remote controller target temperature

setting

(25)Room temperature sensor setting

(26)Synchronization control at low outside

temperature

(27)P1 pump speed control

33-EN

–33–

Hydro Unit

Function code settings

Heating Upper Limit - Zone 1 1A – 37~60°C 60°C

Heating Lower Limit - Zone 1 1B – 20~37°C 20

Heating Upper Limit - Zone 2 1C – 37~60°C 60

Setting

1

Temperature
Range

Hot Water

2

Operation

Hot Water

3

Temperature
Compensation

4 Hot Water Boost

5 Anti Bacteria

6 Priority Mode

Heating Auto

7

Curve Settings

Heating Lower Limit - Zone 2 1D – 20~37°C 20

Cooling - Upper Limit 18 – 18~30°C 25

Cooling - Lower Limit 19 – 7~20°C 7

Hot Water - Upper limit 1E – 60~75°C 75

Hot Water - Lower limit 1F – 40~60°C 40

Heat Pump Start Temperature 20 – 20~45°C 38

Heat Pump Stop Temperature 21 – 40~50°C 45

Temperature Compensation
Outside Air Temperature (°C)

Compensation Temperature
(°C)

Operation Time (x10 min) 08 – 3~18 6

Setting Temperature (°C) 09 – 40~75°C 75

Setting Temperature (°C) 0A – 65~75°C 75

Start Cycle (Day) – 0D 1~10 7

Start Time (Hour) – 0C 0~23 22

Operation Time (min) 0B – 0~60 30

Hot Water & Heating
Switching Temperature (°C)

Boiler & Heat Pump Switching
Temperature (°C)

Outside Temperature T0 (°C) A1 – -30~-20°C -20

Outside Temperature T1 (°C) 29 – -15~0°C -10

Outside Temperature T2 (°C) – – 0 0

Outside Temperature T3 (°C) 2B – 0~15°C 10

Setting Temperature A at T0
(°C) - ZONE 1

Setting Temperature B at T1
(°C) - ZONE 1

Setting Temperature C at T2
(°C) - ZONE 1

Setting Temperature D at T3
(°C) - ZONE 1

Setting Temperature E at 20°C
(°C) - ZONE 1

ZONE2 temperature setting
0 = Percentage (FC 31)
1 = Fixed value (FCA3~A5)

Ratio Of Zone 2 In Zone 1 Auto
Mode (%)

Setting Temperature A’ at T0
(°C) - ZONE 2

Setting Temperature B’ at T1
(°C) - ZONE 2

Setting Temperature E’ at
20°C (°C) - ZONE 2

Auto Curve - Temperature
Shift (°C)

Location & FC

Number

FC Description Hydro RC Range Default

24 – -20~10°C 0

25 – 0~15°C 3

22 – -20~20 0

23 – -20~20 -10

2C – 20~60°C 40

2D – 20~60°C 35

2E – 20~60°C 30

2F – 20~60°C 25

30 – 20~60°C 20

A2 – 0~1 0

31 – 0~100% 80

A3 – 20~60°C 40

A4 – 20~60°C 35

A5 – 20~60°C 20

27 – -5~5°C 0

After

Commissioning

Installation Manual

Change 1Change

2

–34–

34-EN

Hydro Unit

Location & FC

Number

FC Description Hydro RC Range Default

Function 0=Invalid; 1=Valid 3A – 0~1 1

Frost Protection Setting

8 Frost Protection

Back Up Heater

9

Control

10 Night Setback

Hydro 2 Way

12

Valve Operation
Control

Hydro 3 Way

13

Diverting Valve
Operation Control

2 Zone Mixing

14

Valve Drive Time

Boiler/Heat Pump

15

Synchronisation

Maximum
Operation Time Of

16

Hot Water Heat
Pump

17 Cooling Operation

Remote controller

18

Indication

CDU Night Time

19

Low Noise
Operation

20 Alarm Tone Tone Switching 0=OFF; 1=ON – 11 0~1 1

Second Remote
controller and

21

room temperature
thermostat

Temperature (°C)

Schedule date – 12 0~20 0

Schedule time – 13 0~23 0

Downtime Back Up Heater
0=5min;
1=10min;2=15min;3=20min

Uptime Back Up Heater
0=10min; 1=20min; 2=30min;
3=40min

Change Setback Temperature 26 – 3~20°C 5

Zone selection 0=Zone 1 & 2;
1= Zone 1 Only

Start Time (Hour) – 0E 0~23 22

End Time (Hour) – 0F 0~23 06

Cooling 2 Way Valve ­Operation Logic 0=Activated
during cooling; 1=Not
activated during cooling

3 Way Diverting Valve
Operation Logic 0=Activated
during hot water operation;
1=not activated during hot
water operation

Specified Drive Time for
Mixing Valve (x10sec)

Mixing valve OFF (control time

- mins)

External Boiler/Heat Pump
Synchronisation
0=Synchronised; 1=Not
synchronised

Maximum Heat Pump
Operation Time In Hot Water
Operation Priority Mode
(minutes)

0=Cooloing & Heating
Operation; 1=Heating Only
Operation

24h or 12h Time Indication 0=
24h; 1=12h

Low Noise Operation
0=Invalid; 1=Valid

Start Time (Hour) – 0A 0~23 22

End Time (Hour) – 0B 0~23 06

Choice of the initial setting
temperature
0=The fixed temperature by
FC9D
1=The calculated temperature
by Auto curve

Fixed initial temperature
setting

3B – 10~20°C 15

33 – 0~3 1

34 – 0~3 0

58 – 0~1 0

3C – 0~1 0

54 – 0~1 0

0C – 3~24 6

59 – 1~30 4

3E – 0~1 0

07 – 1~120 30

02 – 0~1 0

–050~10

–090~10

B5 – 0~1 0

9D – 20~60°C 40

After

Commissioning

Installation Manual

Change 1Change

2

35-EN

–35–

Hydro Unit

Operation by

22

external input
(option)

Hydro Unit

23

Capacity Setting

Second Remote
controller

24

Target
temperature
Setting

Room

25

Temperature
Sensor Setting

Synchronization
control at low

26

outside
temperature

P1 pump speed

27

control (duty of the
PWM)

Location & FC

Number

FC Description Hydro RC Range Default

0 = Contacts low > high
system stop. System restart
with remote controller
1 = Contacts high > low
system stop. System restart
with remote controller

2 = Contacts high > low
system stop. Contacts low >
high system restart
3 = Contacts low > high
system stop. Contacts low >
high (second time) system
restart

0 = Restart hot water and
heating

1 = Restart in the mode when
stopping
2 = Restart hot water
3 = Restart heating
4 = Tempo control 1; without
heater
5 = Tempo control 2; without
HP and heater

Changing the control of S1
(CN210)
0 = none
1 = Hot water supply control
In addition, it is enabled only
when switch 2_3 is set to
“OFF” and FC61 is set to “3”.

0012 = P804XWH**
0015 = P1104XWH**
Factory set but function code

is needed for PCB
replacement or function code
reset procedure has been
completed.

0=Water temperature
1=Room thermo temperature

Temperature shift for heating – 02 -10~10 -1

Temperature shift for cooling – 03 -10~10 -1

0 = HP + Boiler
1 = Boiler
2 = Backup heater
3 = Boiler (Pump P1:stop)

0=100%, 1=90%, 2=80%
3=70%, 4=60%, 5=50%

52 – 0~3 0

61 – 0~5 0

B6 – 0~1 0

01 –

40 – 0~1 0

5B – 0~3 3

A0 –

0012 or

0015

100%
~50%

Depends
on Hydro

Unit

0

After

Commissioning

Installation Manual

Change 1Change

2

 Settings by purpose

Settings when hot water supply function is
not used

• When the hot water supply function is not used, set
DIP SW12-1 on the Hydro Unit board to ON. (Refer
to page 29.)

Setting for cooling

• For Hydro Units that do not perform cooling (those
for floor heating, etc.), procure a motorized 2-way
valve (for cooling) (refer to “Control parts
specifications” on page 20 for the details.) locally and
attach it to the water pipe that is not used for cooling.
Connect the valve cables to terminals TB05 (3) and
(4) of the Hydro Unit.

–36–

36-EN

Hydro Unit

I

)

Installation Manual

• Stick the optional insulator for cooling to the bottom
of the Hydro Unit.

Settings for hot water supply

• Prepare the optional hot water cylinder.

• Procure a motorized 3-way valve (refer to “Control
parts specifications” on page 20 for the details.)
locally and perform piping. Connect the valve cables
to terminals TB05 (7), (8) and (9) of the Hydro Unit.

• Set DIP SW12-1 on the Hydro Unit board to OFF.
(Refer to page 29.)

• Connect the power supply unit for the hot water
cylinder heater to terminals TB03 L and N of the
Hydro Unit.

• Connect cables between the Hydro Unit and the hot
water cylinder as follows: Hydro Unit terminals
TB03 (1), (2), and earth — Hot water cylinder (1), (2),
and earth
TB06 A, B, and earth — Hot water cylinder A, B, and
earth

Settings for 2-zone temperature control

• Procure a motorized mixing valve (refer to “Control
parts specifications” on page 20 for the details.)
locally and perform piping. Connect the valve cables
to terminals TB04 (1), (2), (3) and (4) of the Hydro
Unit.

• Procure a buffer tank locally.

• Procure a water pump locally, and connect its cables
to terminals TB05 (1) and (2) of the Hydro Unit.

To inhibit interlocking the water pump with the
internal pump of the Hydro Unit, set DIP SW10-3 on
the Hydro Unit board to OFF.

• Set DIP SW12-3 on the Hydro Unit board to ON.
(Refer to page 29.)
Attach the temperature sensor (TFI) connected to
terminals TB06 C and D of the Hydro Unit near the
hot water inlet of the Hydro Unit.

• Fix TFI sensor on the room heating supply pipe by
using the connector procured in locally.

• Cover the cables with insulation tube (minimum 1
mm) or conduit so that the user cannot touch them
directly.

• Cover the TFI sensor's cables and sensor with
insulation tube (minimum 1 mm) shown in the
diagram on the right.

▼ Fig. 8-03

M

TFI

Direct Buffer tank for
Under Floor Heating

Zone 2

Under-floor Heating
(2-Way Valve Control)

▼ Fig. 8-04

nsulation tube (minimum 1 mm

2 Zone hot water supply pipe

TFI Sensor

Tying up

More than 4 mm

Setting for second remote controller

• Prepare the optional second remote controller.

• Connect the cable to terminals TB07 A,B of the
Hydro unit and remote controller.

• Set DIP switch1 on the second remote controller
board to ON.

• <Room thermo control>
Press long the TEST + SET + SELECT

switches on the remote controller to
change the Hydro Unit function code, and change
address 40 to 1,and then press the SET button
to enable the function.

37-EN

–37–

Hydro Unit

Installation Manual

9 Test run

Use operation buttons usually to conduct a test run.
If the outside air temperature or water temperature is

outside the setting value range, press the TEST
button on the remote controller and then start a test
run. Since the protection setting is disabled in the
TEST mode, do not continue a test run longer than 10
minutes.

• Press the TEST button on the remote controller.
An indication “TEST” appears on the remote
controller.

• Press the ZONE1, 2 button and select
“heating” with the OPERATE MODE button.
The pump is activated in 30 seconds.
If air is not released completely, the flow rate switch
is activated to stop operation. Release air again
according to the piping procedure.
Little air bite is discharged from the purge valve.

• Check that the air bite sound disappears.

• Check that the hydraulic pressure has become the
predetermined pressure 0.1 to 0.2 MPa (1 to 2 bar).
If the hydraulic pressure is insufficient, replenish
water.

• Heating operation starts. Check that the hydro unit
starts heating.

• Press the OPERATE MODE button and
select “cooling.”

• Cooling operation starts. Check that the hydro unit
starts cooling and that the floor heating system is not
cooled.

• Press the ZONE1, 2 button to stop
operation.

• Press the HOT WATER button to start hot
water supply operation.

• Check that there is no air bite.

• Check that hot water is present at the connection
port of the hot water cylinder.

• Press the HOT WATER button to stop the
hot water supply operation.

• Press the TEST button to exit the test mode.

10Maintenance

Execute periodic maintenance at least once a year.

Check points

• Check all electrical connections and make
adjustments if they are necessary.

• Check the water pipes of the heating systems in
particular any evidence of leakage.

• Check the expansion tank inner pressure. If it is
insufficient, enclose nitrogen or dry air in the tank.

• Check that the hydraulic pressure is 0.1 MPa (1 bar)
or more with a water manometer. If it is insufficient,
replenish tap water.

• Pull the lever of the pressure relief valve and check
operation.

• Clean the strainer.

• Check the pump for an abnormal sound or other
abnormalities.

–38–

38-EN

Hydro Unit

Installation Manual

11Sensor temperature monitoring function

The sensor sensing temperature is displayed on the
remote controller.

This function allows you to make sure whether the
sensor is installed properly.
Press the TEST + CL buttons for four seconds
or more.
Select the function code with the TEMP.
buttons.

Press the TEST button to exit the test mode.

Item

code

00 Control temperature (Hot water cylinder) °C

01 Control temperature (Zone1) °C

02 Control temperature (Zone2) °C

03 Remote controller sensor temperature °C

04 Condensed temperature (TC) °C

06 Water inlet temperature (TWI) °C

07 Water outlet temperature (TWO) °C

Hydro unit data

08 Water heater outlet temperature (THO) °C

09 Floor inlet temperature (TFI) °C

0A Hot water cylinder temperature (TTW) °C

0B Mixing valve position step

0E Low pressure (Ps) × 10kPa

Data name Unit

Item

code

F0 Micro computer energized accumulation time × 100h

F1 Hot water compressor ON accumulation time × 100h

F2 Cooling compressor ON accumulation time × 100h

F3 Heating compressor ON accumulation time × 100h

Built-in AC pump operation accumulation

F4

Service data

time

Hot water cylinder heater operation

F5

accumulation time

F6 Backup heater operation accumulation time × 100h

F7 Booster heater operation accumulation time × 100h

Data name Unit

× 100h

× 100h

Item

code

60 Heat exchange temperature (TE) °C

61 Outside air temperature (TO) °C

62 Discharge temperature (TD) °C

63 Suction temperature (TS) °C

65 Heat sink temperature (THS) °C

6A Current A

6D Heat exchanger coil temperature (TL) °C

70 Compressor operation Hz Hz

Outdoor unit data

Number of revolutions of outdoor fan

72

(lower)

Number of revolutions of outdoor fan

73

(upper)

74 Outdoor PMV position × 1/10 pls

7A Discharge pressure (PD) × 10kPa

Data name Unit

rpm

rpm

39-EN

–39–

Hydro Unit

12Troubleshooting

 Fault symptoms

Symptom Possible cause Corrective action

Check remote controller operation and temperature
setting

Check whether temperature sensor is installed at the
normal position.

Check DIP switch setting on the Hydro Unit board.
Check the setting with the function code table.

Set hydraulic pressure considering pipe height, and
replenish water until manometer shows a value of set
hydraulic pressure or more.

Widen water path to the hydro unit or adopt a bypass
valve.

Check wiring and parts.

Set hydraulic pressure considering pipe height, and
replenish water until manometer shows a value of set
hydraulic pressure or more.

Check expansion tank capacity compared to total water
amount. If it is insufficient, install another expansion
tank.

Room is not heated or
cooled.

Water is not hot enough.

Nothing is displayed on the
remote controller.

Flow rate switch is
activated.

Error code [A01]

Hot water leaks from
pressure relief valve.

Incorrect remote controller setting

Incorrect function code setting Check function code setting with the function code table.

Backup heater disconnected Check backup heater and bimetal thermostat.

Insufficient capacity Check selection of equipment.

Sensor defect

Power is not supplied. Check power supply wiring.

Incorrect setting

Air bite in the pump Release air completely according to the procedure.

Low hydraulic pressure

Strainer is clogged. Clean the strainer.

Large resistance on the hydro side

Malfunction of motorized 3-way valve
for hot water supply

Excessive hydraulic pressure

Insufficient capacity of expansion tank

Expansion tank failure Check the air pressure.

Installation Manual

Defect mode detected by the Hydro Unit

Check

code

A01

A02

A03

Pump or flowing quantity error

1) Detected by TC sensor

2)Detected by flow switch abnormality

3) Detection of chattering abnormality
in the flow switch input

4) Disconnection of the flow switch
connector

Temperature increase error
(heating)
(TWI, TWO, THO)

Temperature increase error (hot
water supply)

(TTW)

Diagnostic functional operation

Operational cause

Backup
present

Heating

Hot water

Heating

Hot water

Automatic

reset

1. Almost no or little water flow.

• Not enough vent air

• Dirt clogging in the water piping system.

××

O

O

×

O

O

• The water piping is too long.

• Installation of buffer tank and secondary pump

1. Disconnection of the flow switch connector.

2. Defect of the flow switch.

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

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

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

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

×

O ... Possible

× .... Not possible

Determination and action

–40–

40-EN

Hydro Unit

Installation Manual

O ... Possible

× .... Not possible

Check

code

A04

A05

A08

A09

A10

A11

A12

E03

E04

F03

F10

F11

Diagnostic functional operation

Operational cause

Antifreeze operation

Piping antifreeze operation

Low pressure sensor operation
error

Overheat protection operation

(Thermostat of the backup heater)

Antifreeze operation 2

Operation of the release protection

Heating, hot water heater error

Regular communication error
between hydro unit and remote
controller

Regular communication error
between hydro unit and outdoor
unit

TC sensor error

TWI sensor error

TWO sensor error

Backup
present

O

Automatic

reset

×

OO

O

O

×

×

××

Heating
Cooling

×

Hot water

O

OO

×

× O

OO

OO

OO

× O

Determination and action

1. Almost no or little water flow.

• Dirt clogging in the water piping system.

• The water piping is too long or too short.

2. Check the heater power circuit.

• Power supply voltage, breaker, power supply

connection

3. Set the presence of the backup heater.

4. Check the water inlet, water outlet and heat exchange
(TWI, TWO, TC) sensors and Flow Switch.

1. Check the heater power circuit.

• Power supply voltage, breaker, power supply

connection

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

3. Disconnection of the backup heater.

1. Almost no or little water flow.

2. Defect of the flow switch.

3. On-load cooling or prolonged defrosting (a lot of frost
formation) under the above conditions.

4. Defect in the low pressure sensor.

5. Check the refrigeration cycle (gas leak).

1. No water (heating without water) or no water flow.

2. Defect of the flow switch.

3. Defect of the backup heater (poor automatic reset
thermostat).

1. Almost no or little water flow.

2. Check the water inlet, water outlet and heat exchange
(TWO, TC) sensors.

1. Almost no water flow.

2. Defect of the flow switch.

3. Check the water outlet temperature sensor (TWO).

1. Activated by a large load of heating or hot water
supply.

2. Check the heater power circuit (backup or hot water
cylinder heater).

• Power supply voltage, breaker, power supply

connection

1. Check remote controller connection.

2. Defect in the remote controller.

1. Check the serial circuit.

• Miswiring of the crossover between the hydro unit and

the outdoor unit

1. Check the resistance value and connection of the
heat exchange temperature sensor (TC).

1. Check the resistance value and connection of the
water inlet temperature sensor (TWI).

1. Check the resistance value and connection of the
water outlet temperature sensor (TWO).

41-EN

–41–

Hydro Unit

Installation Manual

O ... Possible

× .... Not possible

Check

code

TTW sensor error

F14

TFI sensor error

F17

THO sensor error

F18

Detection of THO disconnection

F19

error

TFI sensor error

F20

Low pressure sensor error

F23

F29 EEROM error

F30 Extended IC error

L02 Combination error

L07 Communication error

Communication error

L09

Setting error

L16

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

Diagnostic functional operation

Operational cause

Backup
present

Automatic

reset

× O

× O

× O

××

××

OO

1. Check the resistance value and connection of the hot
water cylinder sensor (TTW).

1. Check the resistance value and connection of the
floor-inlet temperature sensor (TFI).

1. Check the resistance value and connection of the
heater outlet temperature sensor (THO).

1. Check for any disconnection of the heater outlet
temperature sensor (THO).

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

1. Check the connection (body or connection wiring) of
the low pressure sensor.

2. Check the resistance value of the low pressure
sensor.

Determination and action

××1. Replace the P.C. board. (Hydro unit)
××1. Replace the P.C. board. (Hydro unit)
××1. Check the model name of the outdoor unit.
××1. Replace the P.C. board. (Hydro unit)

1. Check the setting of the FC01 capability

××

specifications.

HWS-P804xx-E = 0012

HWS-P1104xx-E = 0015

××1. Check the body DP-SW12_2,3.

Defect mode detected by the Outdoor Unit

Check

code

TD sensor error

F04

TE sensor error

F06

TL sensor error

F07

TO sensor error

F08

TS sensor error

F12

TH sensor error

F13

TE, TS sensors error

F15

PD sensor error

F24

F31 EEPROM error O

Diagnostic functional operation

Operational cause

Backup
present

O ×

O

O ×

O ×

O ×

O ×

O

O

Automatic

reset

×

×

×

×

Determination and action

1. Check the resistance value and connection of the
discharge sensor (TD).

1. Check the resistance value and connection of the
heat exchange temperature sensor (TE).

1. Check the resistance value and connection of the
heat exchange temperature sensor (TL).

1. Check the resistance value and connection of the
outdoor temperature sensor (TO).

1. Check the resistance value and connection of the
suction temperature sensor (TS).

1. Check the resistance value and connection of the
heat-sink temperature sensor (TH).

1. Check for any wrong installation of the heat exchange
temperature sensor (TE) and the suction temperature
sensor (TS).

1. Check the value of PD sensor by the remote
controller.

–42–

42-EN

Hydro Unit

Installation Manual

Check

code

Compressor breakdown

H01

Compressor lock

H02

Defect in the current detection

H03

circuit

Operation of case thermostat

H04

Unset service PC board jumper

L10

Jumpers have not been cut.

L15 Combination error O

The communication between the

L29

outdoor PC board MUCs error

The outlet temperature error

P03

P04 The high pressure switch error O
P05 The power supply voltage error O × 1. Check the power supply voltage.

Overheating of heat-sink error

P07

Detection of gas leak

P15

Diagnostic functional operation

Operational cause

Backup
present

O ×

O

O

O

O

O

O

O

O ×

Automatic

Determination and action

reset

1. Check the power supply voltage.

2. Over-loaded condition of the refrigeration cycle.

3. Check that the service valve is fully open.

1. Defect of compressor (lock)

×

– Replace the compressor.

2. Defect of compressor wiring (open phase).

× 1. Replace the outdoor inverter control board.

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.

× 1. Cut outdoor PC board jumper wire (for service).

× 1. Check the model name of the hydro unit.

× 1. Replace the outdoor control board.

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).

×

1. Check the thread fastening and heat-sink grease
between the outdoor control board and the heat-sink.

×

2. Check the heat-sink fan duct.

3. Check the resistance value of the heat-sink
temperature sensor (TH).

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), the suction temperature
sensor (TS).

6. Check the value of PD sensor by the remote
controller.

43-EN

–43–

Hydro Unit

Installation Manual

Check

code

P19

P20

P22

P26

P29

Diagnostic functional operation

Operational cause

The 4-way valve inversion error

High pressure protection operation

Outdoor fan system error

Short circuit of the compressor
driver element error

Compressor rotor position error

Backup
present

O ×

O

O

O

O

Automatic

reset

×

×

×

×

Determination and action

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).

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).

6. Check the value of PD sensor by the remote
controller.

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.

1. Abnormality occurs when operating with the
compressor wiring disconnected … Check the
control board.

2. No abnormality occurs when operating with the
compressor wiring disconnected … Compressor rare
short.

1. Even if the connection lead wire of the compressor is
disconnected, it stops due to an abnormality in the
position detection … Replace the inverter control
board.

2. Check the wire wound resistor of the compressor.
Short circuit
… Replace the compressor.

–44–

44-EN

Hydro Unit

Defect mode detected by the remote controller

Diagnostic functional operation

Check code

Not

displaying at

all

(cannot
operate by
the remote

controller)

E01

E02

E09

Operational cause

No communication between hydro
unit an remote controller

No communication between hydro
unit and remote controller

Defect in the signal transmission
to the hydro unit.

(Detected on the remote controller
side)

Several remote controller base
units

(Detected on the remote controller
side)

Status of air­conditioning

Stop – Defect in the remote controller power

Stop
(Automatic reset)

Stop
(Automatic reset)

Stop
(The handset
continues)

Condition

Displayed when
the abnormality
is detected.

Displayed when
the abnormality
is detected.

Displayed when
the abnormality
is detected.

Installation Manual

Determination and action

supply

1. Check the remote controller wiring.

2. Check the remote controller.

3. Check the hydro unit power supply
wiring.

4. Check the water heat exchange
control board.

Defect in the reception of the remote
controller

1. Check the remote controller
crossover.

2. Check the remote controller.

3. Check the hydro power supply wiring.

4. Check the water heat exchanger
board.

Defect in the transmission of the remote
controller

1. Check the transmitter circuit inside the
remote controller.

… Replace the remote controller.

1.2 Check several base units with the

remote controller

… The base unit is only one, and others

are handsets.

45-EN

–45–

EF99808601