Mitsubishi EHSD-VM2C.UK, EHSC-VM2EC.UK, EHSC-MEC.UK, EHSC-VM2C.UK, EHSC-VM6C.UK Service Manual

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Page 1

SERVICE MANUAL

CONTENTS

1. REFERENCE MANUAL

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

2. SAFETY PRECAUTION

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

3. SPECIFICATIONS

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

4. PART NAMES AND FUNCTIONS

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

5. OUTLINES AND DIMENSIONS

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

6. WIRING DIAGRAM

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

7. FIELD WIRING

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

8. WATER SYSTEM DIAGRAM

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

9. CONTROLS

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

10. TROUBLESHOOTING

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

11. DISASSEMBLY PROCEDURE

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

12. SUPPLEMENTARY INFORMATION

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

13. SERVICE AND MAINTENANCE

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

Note:

• This manual describes only service data of Hydrobox.

• RoHS compliant products have <G> mark on the spec name plate.

R410A

MAIN REMOTE CONTROLLER

PARTS CATALOG (OCB571)

HYDROBOX

[Model name]

EHSD-MEC

EHSD-VM2C

EHSC-MEC

EHSC-VM2C

EHSC-VM2EC

EHSC-VM6C

EHSC-VM6EC

EHSC-YM9C

EHSC-YM9EC

EHSC-TM9C

ERSD-VM2C

ERSC-MEC

ERSC-VM2C

EHPX-VM2C

EHPX-YM9C

[Service Ref.]

EHSD-MEC.UK EHSD-VM2C.UK EHSC-MEC.UK EHSC-VM2C.UK EHSC-VM2EC.UK EHSC-VM6C.UK EHSC-VM6EC.UK EHSC-YM9C.UK EHSC-YM9EC.UK EHSC-TM9C.UK ERSD-VM2C.UK ERSC-MEC.UK ERSC-VM2C.UK EHPX-VM2C.UK EHPX-YM9C.UK

October 2014

HYDROBOX

No. OCH571

Page 2

REFERENCE MANUAL

OUTDOOR UNIT'S SERVICE MANUAL

Service Ref. Service Manual No.

PUHZ-W50/85VHA(-BS)

OCH439

PUHZ-W50/85VHAR1(-BS)

PUHZ-W50VHAR2(-BS)

PUHZ-W50VHAR3(-BS)

PUHZ-W85VHA2-BS.UK

OCH465

PUHZ-W85VHA2(R1)-BS.UK

PUHZ-W112VHA(-BS) OCH562

PUHZ-HW112/140YHA(-BS)

OCH439

PUHZ-HW112/140YHA2(-BS)

PUHZ-HW112/140YHA2R1(-BS)

PUHZ-HW112/140YHA2R3(-BS)

PUHZ-HW112/140YHA2R4(-BS)

PUHZ-HW140VHA(-BS)

PUHZ-HW140VHA2(-BS)

PUHZ-HW140VHA2R1(-BS)

PUHZ-HW140VHA2R2-BS

PUHZ-HW140VHA2R3(-BS)

PUHZ-HW140VHA2R4(-BS)

PUHZ-SW40/50VHA(-BS)

OCH525

PUHZ-SW40/50VHAR1(-BS)

PUHZ-SW75/100/120VHA(-BS)

OCH533PUHZ-SW100/125YHA(-BS)

PUHZ-SW100/125YHAR1(-BS)

PUHZ-SHW80/112VHA

OCH526

PUHZ-SHW80/112VHAR2(-BS).UK

PUHZ-SWH112/140YHA(R1)

PUHZ-SWH112/140YHAR2(-BS).UK

PUHZ-FRP71VHA OCH544

SUHZ-SW45VA(H).TH

OCH557

SUHZ-SW45VA(H)R1.TH

OCH571

Page 3

SAFETY PRECAUTION

WARNING

Mechanical

The hydrobox and outdoor units must not be installed, disassembled, relocated, altered or repaired by the user. Ask an authorised installer or technician. If the

unit is installed improperly or modied after installation by the user water leakage, electric shock or re may result.

The outdoor unit should be securely xed to a hard level surface capable of bearing its weight.

The hydrobox should be positioned on a hard vertical surface capable of supporting its lled weight to prevent excessive sound or vibration.

Do not position furniture or electrical appliances below the outdoor unit or hydrobox.

The discharge pipework from the emergency/safety devices of the hydrobox should be installed according to local law.

Only use accessories and replacement parts authorised by Mitsubishi Electric ask a qualied technician to t the parts.

Electrical

All electrical work should be performed by a qualied technician according to local regulations and the instructions given in this manual.

The units must be powered by a dedicated power supply and the correct voltage and circuit breakers must be used.

Wiring should be in accordance with national wiring regulations. Connections must be made securely and without tension on the terminals.

Earth unit correctly.

General

Keep children and pets away from both the hydrobox and outdoor units.

Do not use the hot water produced by the heat pump directly for drinking or cooking. This could cause illness to the user.

Do not stand on the units.

Do not touch switches with wet hands.

Annual maintenance checks on both the hydrobox and the outdoor unit should be conducted by a qualied person.

Do not place contains with liquids on top of the hydrobox. If they leak or spill onto the hydrobox damage to the unit and/or re could occur.

Do not place any heavy items on top of the hydrobox.

When installing, relocating, or servicing the hydrobox, use only the specied refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line,

and may result in an explosion and other hazards.

The use of any refrigerant other than that specied for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

In heating mode, to avoid the heat emitters being damaged by excessively hot water, set the target ow temperature to a minimum of 2ºC below the maximum allowable temperature of all the heat emitters. For Zone2, set the target ow temperature to a minimum of 5ºC below the maximum allowable ow temperature

of all the heat emitters in Zone2 circuit.

CAUTION

Use clean water that meets local quality standards on the primary circuit.

The outdoor unit should be installed in an area with sufcient airow according to the diagrams in the outdoor unit installation manual.

The hydrobox should be located inside to minimise heat loss.

Water pipe-runs on the primary circuit between outdoor and indoor unit should be kept to a minimum to reduce heat loss.

Ensure condensate from outdoor unit is piped away from the base to avoid puddles of water.

Remove as much air as possible from water circuit.

Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378-1.

Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.

Never put batteries in your mouth for any reason to avoid accidental ingestion.

Battery ingestion may cause choking and/or poisoning.

Install the unit on a rigid structure to prevent excessive sound or vibration during operation.

If power to the hydrobox is to be turned off (or system switched off) for a long time, the water should be drained.

Preventative measures should be taken against water hammer, such as installing a Water Hammer Arrestor on the primary water circuit, as directed by the man-

ufacturer.

In order to prevent condensation on emitters, adjust ow temperature appropriately and also set the lower limit of the ow temperature on site.

As for the handling of refrigerant, refer to the outdoor unit installation manual.

Please read the following safety precautions carefully.

WARNING:

Precautions that must be observed to prevent injuries or death.

CAUTION:

Precautions that must be observed to prevent damage to unit.

This installation manual along with the user manual should be left with the product after installation for future reference. Mitsubishi Electric is not responsible for the failure of locally-supplied parts.

• Besuretoperformperiodicalmaintenance.

• Besuretofollowyourlocalregulations.

• Besuretofollowtheinstructionsprovidedinthismanual.

OCH571

Page 4

CAUTION (SPLIT MODELS ONLY)

Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust. Use pipes with the specied thickness. (Refer to 4.4 in the installation manual.) Note the following if reusing existing pipes that carried R22 refrigerant.

- Replace the existing are nuts and are the ared sections again.

- Do not use thin pipes. (Refer to 4.4

in the installation manual.

)

Store the pipes to be used during installation indoors and keep both ends of the pipes sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil deterioration or compressor breakdown may result.

Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the ared sections. If mineral oil is mixed in the refrigeration oil, oil dete-

rioration may result.

Do not use refrigerant other than R410A refrigerant. If another refrigerant is used, the chlorine will cause the oil to deteriorate.

Use the following tools specically designed for use with R410A refrigerant. The following tools are necessary to use R410A refrigerant. Contact your nearest

dealer for any questions.

Tools (for R410A)

Gauge manifold Flare tool

Charge hose Size adjustment gauge

Gas leak detector Vacuum pump adapter

Torque wrench Electronic refrigerant charging scale

Be sure to use the correct tools. If dust, debris, or moisture enters the refrigerant lines, refrigeration oil deterioration may result.

Do not use a charging cylinder, a cylindrical measuring container, when charging R410A refrigerant gas. If the refrigerant gas is transferred to a charging cylinder, the composition of the refrigerant will change and system efciency will be reduced.

WARNING (SPLIT MODELS ONLY)

Do not discharge refrigerant into the atmosphere if refrigerant leaks during installation, ventilate the room.

Use appropriate tools for high pressure refrigerant.

When pumping down refrigerant , stop the compressor before disconnecting the refrigerant pipes.

During installation securely fasten the refrigerant pipes before starting the compressor.

Check that refrigerant gas does not leak after the completion of installation.

Use R410A refrigerant only. Do not allow air to enter the lines. Failure to observe these instructions will cause mechanical failure, system failure or, in the worst

case, serious breach of product safety.

OCH571

Page 5

Gravimeter

Unit

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from refrigerant cylinder

· Check that refrigerant cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

[3] Service tools

Use the service tools below as exclusive tools for R410A refrigerant.

No. Tool name Specifications

Gauge manifold

· Only for R410A

· Use the existing fitting

specifications

. (UNF1/2)

· Use high-tension side pressure of 5.3 MPa·G or over.

Charge hose

· Only for R410A

· Use pressure performance of 5.09 MPa·G or over.

Electronic scale

—

Gas leak detector · Use the detector for R134a, R407C or R410A

Adaptor for reverse flow check · Attach on vacuum pump.

Refrigerant charge base

—

Refrigerant cylinder

· Only for R410A ·Top of cylinder (Pink)

· Cylinder with syphon

Refrigerant recovery equipment

—

OCH571

Page 6

SPECIFICATIONS

Model name

EHSD-MEC EHSD-VM2C EHSC-MEC EHSC-VM2C EHSC-VM2EC EHSC-VM6C EHSC-VM6EC EHSC-YM9C EHSC-YM9EC EHSC-TM9C ERSD-VM2C ERSC-MEC ERSC-VM2C EHPX-VM2C EHPX-YM9C

Overall unit dimensions 800 × 530 × 360 mm (Height × Width × Depth)

Weight (empty) 38 kg 44 kg 42 kg 48 kg 43 kg 49 kg 44 kg 49 kg 44 kg 49 kg 45 kg 43 kg 49 kg 37 kg 38 kg

Weight (full) 44 kg 50 kg 49 kg 55 kg 50 kg 56 kg 51 kg 56 kg 51 kg 56 kg 51 kg 50 kg 56 kg 42 kg 43 kg

Plate heat exchanger (MWA2) — —

— — —

Plate heat exchanger (MWA1)

— — — — — — — — — — — —

Cooling mode NOT available Available NOT available

Unvented expansion

vessel(Primary heat-

ing)

Nominal volume — 10 L — 10 L — 10 L — 10 L — 10 L — 10 L

Charge pressure — 1 bar — 1 bar — 1 bar — 1 bar — 1 bar — 1 bar

Safety

device

Water

circuit

(Pri-

mary)

Control thermistor 1 - 80°C

Pressure relief valve 0.3 Mpa (3bar)

Flow sensor Min ow 5.0 L/min

Booster

heater

Manual reset thermostat — 90°C — 90°C — 90°C

Thermal Cut-out (for dry run prevention) — 121°C — 121°C — 121°C

Primary circuit circulating Pump Grundfos UPM2 15 70 - 130

Connections

Water 28mm compression (primary circuit) G1 (Male)

28mm compression

(primary circuit)

Refrigerant

(R410A)

Liquid 6.35 mm 9.52 mm 6.35 mm 9.52 mm —

Gas 12.7 mm 15.88 mm 12.7 mm 15.88 mm —

Target tempera-

ture range

Flow

temperature

Heating 25 - 60°C

Cooling — 5 - 25°C —

Room

temperature

Heating 10 - 30 °C

Cooling — NOT available —

Guaranteed oper-

ating range

Ambient *1 0 - 35°C (

80 %RH)

Outdoor

temperature

Heating See outdoor unit spec table.

Cooling —

See outdoor unit spec table

(min. 10°C). *2

—

Electrical data

Control board

Power supply

(Phase, voltage, frequency)

~/N, 230 V, 50 Hz

Breaker (*when powered

from independent source)

10A

Booster

heater

Power supply

(Phase, voltage, frequency)

—

~/N, 230 V,

50 Hz

—

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

3~, 400 V,

50 Hz

3~, 400 V,

50 Hz

3~, 230 V,

50 Hz

~/N, 230 V,

50 Hz

—

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

3~, 400 V,

50 Hz

Capacity — 2kW — 2kW 2kW

2kW+

4kW

2kW+

4kW

3kW+

6kW

3kW+

6kW

3kW+

6kW

2kW — 2kW 2kW

3kW+

6kW

Current — 9 A — 9 A 9 A 26 A 26 A 13A 13A 23A 9 A — 9 A 9 A 13A

Breaker — 16 A — 16 A 16 A 32 A 32 A 16A 16A 32A 16 A — 16 A 16 A 16A

Sound level 28 dB(A)

Optional extras

●Wireless Remote Controller PAR-WT50R-E ●

Tank thermistor (THW5) (30 m)

PAC-TH011TKL-E *1 The environment must be frost-free.

●Wir ele ss Re ceiv er PAR-WR51R-E ●Th erm ist or PAC-TH011-E *2 Low ambient cooling is NOT allowed.

●Rem ote Se nsor PAC-SE41TS-E ●High temperature thermistor PAC-TH011HT-E

●Tank thermistor (THW5) (5 m) PAC-TH011TK-E ●ecodan Wi-Fi Interface PAC-WF010-E

OCH571

Page 7

PART NAMES AND FUNCTIONS

<E*S*-*M**C> (Split model system)

<EHPX-*M*C> (Packaged model system)

No. Part name

EHS*-MEC

EHS*-

*M*C

EHSC*M*EC

ERS*VM2C

ERSC-

MEC

EHPX-

*M*C

1 Control and electrical box

2 Main controller

Plate heat exchanger (Refrigerant - Water)

4 Water circulation pump 1

5 Pump valve

6 Drain cock (Primary circuit)

7 Booster heater 1,2

- -

8 Flow sensor

9 Manometer

10 Pressure relief valve (3bar)

11 Automatic air vent

12 Expansion vessel

- - -

13 Strainer valve

14 Drain pan

- - - -

OCH571

Page 8

OUTLINES AND DIMENSIONS

(

348)

357

291

263

242

103

461

419

334

163

124

242

(348)

357

291

263

134

133

365

308

163

223

124

461

100±5

592

800

260

530

C D

A G

(348)

461

410

395

353

310

163

124

291

263

357

242

164

(242)

110

Unit: mm

<EHS*> (Split model system)

<Front>

Automatic air vent

Front panel

Earth leakage circuit

breaker

Terminal block

Main Controller

Pressure relief valve

G1/2

Back panel support

Hook

<ERS*> (Split model system for heating and cooling)

<EHPX> (Packaged model system)

Letter Pipe description Connection size/type

Space heating/Indirect

DHW tank (primary) return connection

28 mm/Compression (EHS*-*and EHPX-*) G1 nut (ERS*-*)

Space heating/Indirect DHW tank (primary) ow

connection

28 mm/Compression (EHS*-*and EHPX-*) G1 nut (ERS*-*)

C Refrigerant (Liquid)

6.35 mm/Flare (E*SD-*)

9.52 mm/Flare (E*SC-*)

D Refrigerant (Gas)

12.7 mm/Flare (E*SD-*)

15.88 mm/Flare (E*SC-*)

Flow connection from heat

pump

28 mm/Compression (EHPX-*)

Return connection to heat pump

28 mm/Compression (EHPX-*)

Discharge pipe (by installer) from pressure relief valve

G1/2” female (valve port within hydrobox casing)

Electrical cable inlets

For inlets and , run high-voltage wires

including power cable, indoor-outdoor cable, and external output wires.

For inlets

and , run low-voltage

wires including external input wires and thermistor wires. For a wireless receiver (option) cable,

use inlet

I Drain socket

O.D. ø20

5-1. Technical Drawings

OCH571

Page 9

Service access

5-2. Service access diagrams

Service access

Parameter Dimension (mm)

a 200 b 150 c 500 d 500

Sufcient space MUST be left for the provision of discharge pipework as detailed in National and Local building regulations.

The hydrobox must be located indoors and in a frost-free environment, for example in a utility room.

OCH571

Page 10

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

CN3C (BLU)

BLK

ORN

BRN

CN3C (BLU)

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

CN3C (BLU)

CNPWM

(WHT)

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

THW8

THW7

THW6

THW9

THWB1

THWB2

Main

controller

1 2

CN20

(RED)

TH1

CN21

(YLW)

TH2

THW1

THW2

CNW12

(RED)

t°t

THW5

CNW5

(WHT)

CN108

Wireless receiver

(Option)

WiFi adapter

(Option)

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

1 2 3 4 5 6

Open

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

2WV2a

MXV

MP2

MP1

CNV1 (WHT)

CNBHT

(BLK)

X11

X13

X10

X14

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CN22 (BLU)

CNIT (BLU)

TAB1

CN01

(WHT)

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1 3

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CN01

(WHT)

CN01 (WHT)

4 6

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1 2

CNBHT (BLK)

1 3

CNIH (ORN)

CNW5 (WHT)

CN21 (YLW)

CNW12

(RED)

CN20 (RED)

TBI.2

126 10148

137 11945321

CNIH (ORN)

MP3

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

357 91113

CN1A

(WHT)

2 4 6 8 10 12 14

357 91113

TBI.1

2WV2b

TBO.2

3WV

M 1

4 5 6

TBO.2

2WV1

M 1

4 5 6

IN6

IN1

IN2

IN3

IN4

IN5

IN7

CNP4 (RED)

MP4

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



–+–+–

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

CNBC (GRY)

CNBH (WHT)

6 WIRING DIAGRAM

6-1. EHSC-MEC, EHSD-MEC, ERSC-MEC

1. Symbols used in wiring diagram are,

: connector, : terminal block.

2. Indoor unit and outdoor unit connecting wires

have polarities, make sure to match terminal

numbers (S1, S2, S3) for correct wirings,

3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for service.

Symbol Name TH1 Thermistor (Room temp.)(Option) TH2 Thermistor (Ref. liquid temp.) THW1 Thermistor (Flow water temp.) THW2 Thermistor (Return water temp.) THW5 Thermistor (DHW tank water temp.)(Option) THW6 Thermistor (Zone1 ow temp.)(Option) THW7 Thermistor (Zone1 return temp.)(Option) THW8 Thermistor (Zone2 ow temp.)(Option) THW9 Thermistor (Zone2 return temp.)(Option) THWB1 Thermistor (Boiler ow temp.)(Option) THWB2 Thermistor (Boiler return temp.)(Option) IN1 Room thermostat 1 (Local supply) IN2 Flow switch 1 (Local supply) IN3 Flow switch 2 (Local supply) IN4 Demand control (Local supply) IN5 Outdoor thermostat (Local supply) IN6 Room thermostat 2 (Local supply) IN7 Flow switch 3 (Local supply) IN8 Electric energy meter 1 (Local supply) IN9 Electric energy meter 2 (Local supply) IN10 Heat meter (Local supply)

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-Outdoor unit) LED4 Reading or writing data to SD card

CNPWM

Pump speed control signal for MP1

CN108 SD card connector

Table 1 Signal Inputs

Name

Terminal block

Connector

Item OFF (Open) ON (Short) IN1 TBI.1 13-14 — Room thermostat 1 input Refer to SW2-1 in <Table 3 DIP Switch Functions>. IN2 TBI.1 11-12 — Flow switch 1 input Refer to SW2-2 in <Table 3 DIP Switch Functions>. IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <Table 3 DIP Switch Functions>. IN4 TBI.1 7-8 — Demand control input Normal Heat source OFF/ Boiler operation *2 IN5 TBI.1 5-6 — Outdoor thermostat input *1 Standard operation Heater operation/ Boiler operation *2 IN6 TBI.1 3-4 — Room thermostat 2 input Refer to SW3-1 in <Table 3 DIP Switch Functions>. IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>. IN8 TBI.3 1-2 — Electric energy meter 1

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

Table 2 Outputs

Name

Terminal block

Connector

Item OFF ON

OUT1

TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW) OFF ON

OUT2

TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1) OFF ON

OUT3

TBO.1 5-6 —

Water circulation pump 3 output (Space heating/cooling for Zone2) *1

OFF ON

2-way valve 2b output *2

OUT4

TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW

OUT5

TBO.2 1-2

— Mixing valve output *1 Stop

TBO.2 2-3 Open

OUT6

—

CNBH 1-3

Booster heater 1 output OFF ON

OUT7

—

CNBH 5-7

Booster heater 2 output OFF ON

OUT8

TBO.4 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

Symbol Name TB1 Terminal block <Power supply, Outdoor unit> MP1 Water circulation pump 1(Space heating & DHW) MP2 Water circulation pump 2

(Space heating for Zone1)(Local supply)

MP3 Water circulation pump 3

(Space heating for Zone2)(Local supply)

MP4 Water circulation pump 4 (DHW)(Local supply) 3WV(2WV1)

3-way valve (2-way valve 1)(Local supply)

2WV2a 2-way valve (For Zone 1)(Local supply) 2WV2b 2-way valve (For Zone 2)(Local supply) MXV Mixing valve (Local supply)

OCH571

Page 11

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply

~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

CN3C (BLU)

BLK

ORN

BRN

CN3C (BLU)

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

CN3C (BLU)

CNPWM

(WHT)

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

THW8

THW7

THW6

THW9

THWB1

THWB2

Main

controller

1 2

CN20

(RED)

TH1

CN21

(YLW)

TH2

THW1

THW2

CNW12

(RED)

t°t

THW5

CNW5

(WHT)

CN108

Wireless receiver

(Option)

WiFi adapter

(Option)

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

1 2 3 4 5 6

Open

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

2WV2a

MXV

MP2

MP1

CNV1

(WHT)

CNBHT

(BLK)

X11

X13

X10

X14

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CN22 (BLU)

CNIT (BLU)

TAB1

CN01

(WHT)

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1 3

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CN01 (WHT)

CN01

(WHT)

CN01 (WHT)

4 6

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1 2

CNBHT (BLK)

1 3

CNIH (ORN)

CNW5 (WHT)

CN21

(YLW)

CNW12

(RED)

CN20

(RED)

TBI.2

126 10148

137 11945321

CNIH (ORN)

MP3

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

357 91113

CN1A

(WHT)

2 4 6 8 10 12 14

357 91113

TBI.1

2WV2b

TBO.2

3WV

M 1

4 5 6

TBO.2

2WV1

4 5 6



IN6

IN1

IN2

IN3

IN4

IN5

IN7

WHT

M 1

CNP4 (RED)

MP4

–+–+–

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

2 2

ECB1

L (1)N(3)

BHCP

BLU

RED

WHT/No.2

WHT/No.1

RED

VLT

GRY

BHC1

BHT

642

531

BH1

BHF

Power supply

to Booster heater

642

531

CNBH (WHT)

CNBHT

(BLK)

CNBC (GRY)

~/N 230V 50Hz

CNBC (GRY)

CNBH (WHT)



6-2. EHSC-VM2C, EHSC-VM2EC, EHSD-VM2C, ERSC-VM2C, ERSD-VM2C, EHPX-VM2C

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-Outdoor unit) LED4 Reading or writing data to SD card

CNPWM

Pump speed control signal for MP1

CN108 SD card connector

Table 1 Signal Inputs

Name

Terminal block

Connector

Standard operation

Heater operation/ Boiler operation *2 IN6 TBI.1 3-4 — Room thermostat 2 input Refer to SW3-1 in <Table 3 DIP Switch Functions>. IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>. IN8 TBI.3 1-2 — Electric energy meter 1

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

Table 2 Outputs

Name

Terminal block

Connector

Item OFF ON

OUT1

TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW) OFF ON

OUT2

TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1) OFF ON

OUT3

TBO.1 5-6 —

Water circulation pump 3 output (Space heating/cooling for Zone2) *1

OFF ON

2-way valve 2b output *2

OUT4

TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW

OUT5

TBO.2 1-2

— Mixing valve output *1 Stop

TBO.2 2-3 Open

OUT6

—

CNBH 1-3

Booster heater 1 output OFF ON

OUT7

—

CNBH 5-7

Booster heater 2 output OFF ON

OUT8

TBO.4 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

1. Symbols used in wiring diagram are, : connector, : terminal block.

2. Indoor unit and outdoor unit connecting wires have polarities, make

sure to match terminal numbers (S1, S2, S3) for correct wirings,

3. Since the outdoor unit side electric wiring may change, be sure to

check the outdoor unit electric wiring diagram for service.

Symbol Name TB1 Terminal block <Power supply, Outdoor unit> ECB1 Earth leakage circuit breaker for booster heater MP1 Water circulation pump 1(Space heating & DHW) MP2

Water circulation pump 2 (Space heating for Zone1)(Local supply)

MP3

Water circulation pump 3 (Space heating for Zone2)(Local supply)

MP4 Water circulation pump 4 (DHW)(Local supply) 3WV(2WV1)

3-way valve (2-way valve 1)(Local supply)

2WV2a 2-way valve (For Zone 1)(Local supply) 2WV2b 2-way valve (For Zone 2)(Local supply) MXV Mixing valve (Local supply) BHT Thermostat for booster heater BHF Thermal fuse for booster heater BH1 Booster heater 1 BHC1 Contactor for booster heater 1 BHCP Contactor for booster heater protection

OCH571

Page 12

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

BLK

ORN

BRN

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

CN3C (BLU)

CNPWM

(WHT)

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

THW8

THW7

THW6

THW9

THWB1

THWB2

Main

controller

1 2

CN20

(RED)

TH1

CN21

(YLW)

TH2

THW1

THW2

CNW12

(RED)

t°t

THW5

CNW5

(WHT)

CN108

Wireless receiver

(Option)

WiFi adapter

(Option)

CN22 (BLU)

1 2 3 4 5 6

Open

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

2WV2a

MXV

MP2

MP1

CNV1 (WHT)

CNBHT

(BLK)

X11

X13

X10

X14

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

TAB1

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1 3

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CN01 (WHT)

4 6

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1 2

CNBHT (BLK)

1 3

CNIH (ORN)

CNW5 (WHT)

CN21 (YLW)

CNW12

(RED)

CN20 (RED)

TBI.2

126 10148

137 11945321

CNIH (ORN)

MP3

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

357 91113

CN1A (WHT)

2 4 6 8 10 12 14

357 91113

TBI.1

2WV2b

TBO.2

3WV

4 5 6

TBO.2

2WV1

4 5 6

IN6

IN1

IN2

IN3

IN4

IN5

IN7

WHT

CNP4 (RED)

MP4

CNBC (GRY)

CNBH (WHT)

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

CNIT (BLU)

CN01 (WHT)

CN3C (BLU)

CN01 (WHT)

CN3C (BLU)

CN01

(WHT)

–

+–+–+

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

2 2 2

ECB1

L (1)N(3)

BHCP

BLU

REDRED

BLU/No.3

WHT/No.2

WHT/No.1

BLU/No.4

RED

VLT

PNK

GRY

BHC2

BHC1

BHT

642

531

642

531

BH1

BHF

BH2

Power supply

to Booster heater

642

531

CNBH (WHT)

CNBHT

(BLK)

CNBC (GRY)

~/N 230V 50Hz

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



6-3. EHSC-VM6C, EHSC-VM6EC

Symbol Name BHCP Contactor for booster heater protection TH1 Thermistor (Room temp.)(Option) TH2 Thermistor (Ref. liquid temp.) THW1 Thermistor (Flow water temp.) THW2 Thermistor (Return water temp.) THW5 Thermistor (DHW tank water temp.)(Option) THW6 Thermistor (Zone1 ow temp.)(Option) THW7 Thermistor (Zone1 return temp.)(Option) THW8 Thermistor (Zone2 ow temp.)(Option) THW9 Thermistor (Zone2 return temp.)(Option) THWB1 Thermistor (Boiler ow temp.)(Option) THWB2 Thermistor (Boiler return temp.)(Option) IN1 Room thermostat 1 (Local supply) IN2 Flow switch 1 (Local supply) IN3 Flow switch 2 (Local supply) IN4 Demand control (Local supply) IN5 Outdoor thermostat (Local supply) IN6 Room thermostat 2 (Local supply) IN7 Flow switch 3 (Local supply) IN8 Electric energy meter 1 (Local supply) IN9 Electric energy meter 2 (Local supply) IN10 Heat meter (Local supply)

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-Outdoor unit) LED4 Reading or writing data to SD card

CNPWM

Pump speed control signal for MP1

CN108 SD card connector

Table 1 Signal Inputs

Name

Terminal block

Connector

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may

be reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

Table 2 Outputs

Name

Terminal block

Connector

Item OFF ON

OUT1

TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW) OFF ON

OUT2

TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1) OFF ON

OUT3

TBO.1 5-6 —

Water circulation pump 3 output (Space heating/cooling for Zone2) *1

OFF ON

2-way valve 2b output *2

OUT4

TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW

OUT5

TBO.2 1-2

— Mixing valve output *1 Stop

TBO.2 2-3 Open

OUT6

—

CNBH 1-3

Booster heater 1 output OFF ON

OUT7

—

CNBH 5-7

Booster heater 2 output OFF ON

OUT8

TBO.4 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

1. Symbols used in wiring diagram are, : connector, : terminal block.

2. Indoor unit and outdoor unit connecting wires have polarities,

make sure to match terminal numbers (S1, S2, S3) for correct

wirings,

3. Since the outdoor unit side electric wiring may change, be sure to

check the outdoor unit electric wiring diagram for service.

Symbol Name TB1 Terminal block <Power supply, Outdoor unit> ECB1 Earth leakage circuit breaker for booster heater MP1 Water circulation pump 1(Space heating & DHW) MP2

Water circulation pump 2 (Space heating for Zone1)(Local supply)

MP3

Water circulation pump 3 (Space heating for Zone2)(Local supply)

MP4 Water circulation pump 4 (DHW)(Local supply) 3WV(2WV1)

3-way valve (2-way valve 1)(Local supply)

2WV2a 2-way valve (For Zone 1)(Local supply) 2WV2b 2-way valve (For Zone 2)(Local supply) MXV Mixing valve (Local supply) BHT Thermostat for booster heater BHF Thermal fuse for booster heater BH1 Booster heater 1 BH2 Booster heater 2 BHC1 Contactor for booster heater 1 BHC2 Contactor for booster heater 2

OCH571

Page 13

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

BLK

ORN

BRN

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

IN6

IN1

IN2

IN3

IN4

IN5

IN7

t°t

THW8

THW7

THW6

THW9

THWB1

THWB2

Main

controller

1 2

CN20

(RED)

TH1

CN21

(YLW)

TH2

THW1

THW2

CNW12

(RED)

t°t

THW5

CNW5

(WHT)

CN108

Wireless receiver

(Option)

WiFi adapter

(Option)

CN22 (BLU)

1 2 3 4 5 6

Open

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

2WV2a

MXV

MP2

MP1

CNV1 (WHT)

CNBHT

(BLK) CNBC (GRY)

CNBH (WHT)

X11

X13

X10

X14

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CNP1 (WHT)

CNP4 (RED)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

TAB1

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1 3

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

4 6

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1 2

CNBHT (BLK)

1 3

CNIH (ORN)

TBI.2

126 10148

137 11945321

CNIH (ORN)

MP3

2 2 2

ECB1

L2 (3)L1(1)L3(5)

BHCP

BLK

WHT

WHTWHT

BLK

REDRED

BLU/No.4

WHT/No.2

WHT/No.3

WHT/No.1

BLU/No.5

BLU/No.6

RED

VLT

PNK

WHT

GRY

BHC2

BHC1

BHT

642

531

642

531

BH1

BHF

BH2

4 6

Power supply

to Booster heater

642

531

3~ 400V 50Hz

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

357 91113

2 4 6 8 10 12 14

357 91113

TBI.1

2WV2b

TBO.2

3WV

M 1

4 5 6

TBO.2

2WV1

M 1

4 5 6



MP4

CNBHT (BLK)

CNBC (GRY)

CNBH (WHT)

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CN3C (BLU)

CNPWM

(WHT)

CNRF (WHT)

CN105

(RED)

CN22 (BLU)

CNIT

(BLU)

CN01 (WHT)

–

+–+–+

CN3C (BLU)

CN01

(WHT)

CN01

(WHT)

CN01 (WHT)

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

1 2

CNW5 (WHT)

CN21

(YLW)

CNW12

(RED)

CN20 (RED)

CN1A

(WHT)

6-4. EHSC-YM9C, EHSC-YM9EC, EHPX-YM9C

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1−3 Terminal block <Signal Inputs, Thermistor>

F1 Fuse (T10AL250V)

F2 Fuse (T6.3AL250V)

SW1−5 DIP switch *See Table 3

X1−15 Relay

LED1 Power supply (FTC5)

LED2 Power supply (Main controller)

LED3 Communication (FTC5-Outdoor unit)

LED4 Reading or writing data to SD card

CNPWM

Pump speed control signal for MP1

CN108 SD card connector

Table 1 Signal Inputs

Name

Terminal block

Connector

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

Table 2 Outputs

Name

Terminal block

Connector

Item OFF ON

OUT1

TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW) OFF ON

OUT2

TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1) OFF ON

OUT3

TBO.1 5-6 —

Water circulation pump 3 output (Space heating/cooling for Zone2) *1

OFF ON

2-way valve 2b output *2

OUT4

TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW

OUT5

TBO.2 1-2

— Mixing valve output *1 Stop

TBO.2 2-3 Open

OUT6

—

CNBH 1-3

Booster heater 1 output OFF ON

OUT7

—

CNBH 5-7

Booster heater 2 output OFF ON

OUT8

TBO.4 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

1. Symbols used in wiring diagram are, : connector, : terminal block.

2. Indoor unit and outdoor unit connecting wires have polarities,

make sure to match terminal numbers (S1, S2, S3) for correct

wirings,

3. Since the outdoor unit side electric wiring may change, be sure to

check the outdoor unit electric wiring diagram for service.

Symbol Name TB1 Terminal block <Power supply, Outdoor unit> ECB1 Earth leakage circuit breaker for booster heater MP1 Water circulation pump 1(Space heating & DHW) MP2

Water circulation pump 2 (Space heating for Zone1)(Local supply)

MP3

Water circulation pump 3 (Space heating for Zone2)(Local supply)

MP4 Water circulation pump 4 (DHW)(Local supply) 3WV(2WV1)

3-way valve (2-way valve 1)(Local supply)

2WV2a 2-way valve (For Zone 1)(Local supply) 2WV2b 2-way valve (For Zone 2)(Local supply) MXV Mixing valve (Local supply) BHT Thermostat for booster heater BHF Thermal fuse for booster heater BH1 Booster heater 1 BH2 Booster heater 2 BHC1 Contactor for booster heater 1 BHC2 Contactor for booster heater 2 BHCP Contactor for booster heater protection

OCH571

Page 14

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

BLK

ORN

BRN

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

CN3C (BLU)

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

THW8

THW7

THW6

THW9

THWB1

THWB2

Main

controller

1 2

CN20

(RED)

TH1

CN21

(YLW)

TH2

THW1

THW2

CNW12

(RED)

t°t

THW5

CNW5

(WHT)

CN108

Wireless receiver

(Option)

WiFi adapter

(Option)

CN22 (BLU)

1 2 3 4 5 6

Open

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

2WV2a

MXV

MP2

MP1

CNV1 (WHT)

CNBHT

(BLK)

X11

X13

X10

X14

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

TAB1

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1 3

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

4 6

1 2 4 6

4 6

1 2

1 3

TBI.2

126 10148

137 11945321

CNIH

(ORN)

MP3

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

357 91113

2 4 6 8 10 12 14

357 91113

TBI.1

2WV2b

TBO.2

3WV

4 5 6

TBO.2

2WV1

4 5 6



IN6

IN1

IN2

IN3

IN4

IN5

IN7

M 1

CNP4 (RED)

MP4

CNBC (GRY)

CNBH (WHT)

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



–+–+–

CNPWM

(WHT)

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

CNIT (BLU)

CN01

(WHT)

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CNBH (WHT)

CNBC (GRY)

CNBHT (BLK)

CNIH (ORN)

CN3C (BLU)

CN01 (WHT)

CN01

(WHT)

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

2 2 2

ECB1

L2 (3)L1(1)L3(5)

BHCP

BLK

WHT

WHTWHT

BLK

REDRED

BLU/No.4

WHT/No.2

WHT/No.3

WHT/No.1

BLU/No.5

BLU/No.6

RED

VLT

PNK

GRY

BHC2

BHC1

BHT

642

531

642

531

BH1

BHF

BH2

Power supply

to Booster heater

642

531

3~ 230V 50Hz

CNBHT (BLK)

CNBC (GRY)

CNBH (WHT)

WHT



1 2

CNW5 (WHT)

CN21 (YLW)

CNW12

(RED)

CN20 (RED)

CN1A (WHT)

6-5. EHSC-TM9C

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-Outdoor unit) LED4 Reading or writing data to SD card

CNPWM

Pump speed control signal for MP1

CN108 SD card connector

Table 1 Signal Inputs

Name

Terminal block

Connector

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

Table 2 Outputs

Name

Terminal block

Connector

Item OFF ON

OUT1

TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW) OFF ON

OUT2

TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1) OFF ON

OUT3

TBO.1 5-6 —

Water circulation pump 3 output (Space heating/cooling for Zone2) *1

OFF ON

2-way valve 2b output *2

OUT4

TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW

OUT5

TBO.2 1-2

— Mixing valve output *1 Stop

TBO.2 2-3 Open

OUT6

—

CNBH 1-3

Booster heater 1 output OFF ON

OUT7

—

CNBH 5-7

Booster heater 2 output OFF ON

OUT8

TBO.4 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

1. Symbols used in wiring diagram are, : connector, : terminal block.

2. Indoor unit and outdoor unit connecting wires have polarities,

make sure to match terminal numbers (S1, S2, S3) for correct

wirings,

3. Since the outdoor unit side electric wiring may change, be sure to

check the outdoor unit electric wiring diagram for service.

Symbol Name TB1 Terminal block <Power supply, Outdoor unit> ECB1 Earth leakage circuit breaker for booster heater MP1 Water circulation pump 1(Space heating & DHW) MP2

Water circulation pump 2 (Space heating for Zone1)(Local supply)

MP3

Water circulation pump 3 (Space heating for Zone2)(Local supply)

MP4 Water circulation pump 4 (DHW)(Local supply) 3WV(2WV1)

3-way valve (2-way valve 1)(Local supply)

2WV2a 2-way valve (For Zone 1)(Local supply) 2WV2b 2-way valve (For Zone 2)(Local supply) MXV Mixing valve (Local supply) BHT Thermostat for booster heater BHF Thermal fuse for booster heater BH1 Booster heater 1 BH2 Booster heater 2 BHC1 Contactor for booster heater 1 BHC2 Contactor for booster heater 2 BHCP Contactor for booster heater protection

OCH571

Page 15

Automatic switch to heat source only operation

Back-up heat source operation (*1) will automatically run when the outdoor unit stops abnormally. To enable the function, switch DIP SW 2-5 to ON. During the back-up operation, an error code(s) and the contact number will be displayed alternately. External output (OUT11) will be available. To clear the fault(s), reset the power breakers on the indoor and outdoor units.

E6 to E9, ED, P6, P8, U1 to U8, UD, UE, UF, UL, UP

(*1) Prolonged running of the back-up operation may affect the life of the heat source. (*2) For safety reasons, this function is not available for certain faults. (System operation must be stopped and only pump keeps running.)

6-6. DIP switch setting

Located on the FTC printed circuit board are 5 sets of small white switches known as DIP switches. The DIP switch number is printed on the circuit board next to the relevant switches. The word ON is printed on the circuit board and on the DIP switch block itself. To move the switch you will need to use a pin or the

corner of a thin metal ruler or similar.

DIP switch settings are listed in the table below. Make sure to turn off both indoor unit and outdoor unit power supplies before changing the switch settings.

DIP switch Function OFF ON

Default settings:

Indoor unit model

SW1

SW1-1 Boiler WITHOUT Boiler WITH Boiler OFF

SW1-2 Heat pump maximum outlet water temperature 55ºC 60ºC ON *1

SW1-3 DHW tank WITHOUT DHW tank WITH DHW tank OFF

SW1-4 Immersion heater WITHOUT Immersion heater WITH Immersion heater OFF

SW1-5 Booster heater WITHOUT Booster heater WITH Booster heater

OFF: E***-M*C ON : E***-*M2/6/9C

SW1-6 Booster heater function For heating only For heating and DHW

OFF: E***-M*C ON : E***-*M2/6/9C

SW1-7 Outdoor unit type Split type Packaged type

OFF: E*S*-*M*C ON : EHPX-*M*C

SW1-8 Wireless remote controller WITHOUT Wireless remote controller WITH Wireless remote controller OFF

SW2

SW2-1 Room thermostat1 input (IN1) logic change

Zone1 operation stop at thermostat short Zone1 operation stop at thermostat open

OFF

SW2-2 Flow switch1 input (IN2) logic change Failure detection at short Failure detection at open OFF

SW2-3 Booster heater capacity restriction Inactive Active

OFF: Except E***-VM2*C ON : E***-VM2*C

SW2-4 Cooling mode function Inactive Active

OFF: Except ERS*-*M**C ON : ERS*-*M**C

SW2-5

Automatic switch to backup heat source operation

(When outdoor unit stops by error)

Inactive Active *2 OFF

SW2-6 Mixing tank WITHOUT Mixing tank WITH Mixing tank OFF

SW2-7 2-zone temperature control Inactive Active *6 OFF

SW2-8 Flow sensor WITHOUT Flow sensor WITH Flow sensor ON

SW3

SW3-1 Room thermostat 2 input (IN6) logic change Zone2 operation stop at thermostat short Zone2 operation stop at thermostat open OFF

SW3-2 Flow switch 2 input (IN3) logic change Failure detection at short Failure detection at open OFF

SW3-3 Flow switch 3 input (IN7) logic change Failure detection at short Failure detection at open OFF

SW3-4 Electric energy meter WITHOUT Electric energy meter WITH Electric energy meter OFF SW3-5 Heating mode function *3 Inactive Active ON SW3-6 2-zone valve ON/OFF control Inactive Active OFF

SW3-7 Heat exchanger for DHW Coil in tank External plate HEX OFF

SW3-8 Heat meter WITHOUT Heat meter WITH Heat meter OFF

SW4

SW4-1 Multiple outdoor units control Inactive Active OFF

SW4-2 Position of multiple outdoor units control *7 Slave Master OFF

SW4-3 — — — OFF

SW4-4

Indoor unit only operation (during installation work) *4

Inactive Active OFF

SW4-5 Emergency mode (Heater only operation) Normal

Emergency mode (Heater only operation)

OFF *5

SW4-6 Emergency mode (Boiler operation) Normal Emergency mode (Boiler operation) OFF *5

SW5

SW5-1

DHW tank water temperature over heat protection (L4)

Active Inactive *8 OFF

SW5-2 — — — OFF

SW5-3

SW5-4

SW5-5

SW5-6

SW5-7

SW5-8 — — — OFF

Note:

*1. When the hydrobox is connected with a PUHZ-RP/SUHZ-SW outdoor unit of which maximum outlet water temperature is 55ºC, DIP SW1-2 must be changed to OFF. *2.

OUT11 will be available. For safety reasons, this function is not available for certain errors. (In that case, system operation must be stopped and only the water circulation pump keeps running.)

*3 This switch functions only when the hydrobox is connected with a PUHZ-FRP outdoor unit. When another type of outdoor unit is connected, the heating mode function is active

regardless of the fact that this switch is ON or OFF. *4. Space heating and DHW can be operated only in indoor unit, like an electric boiler. (Refer to “Indoor unit only operation” in page 40. ) *5. If emergency mode is no longer required, return the switch to OFF position. *6. Active only when SW3-6 is set to OFF. *7. Active only when SW4-1 is set to ON. *8.

Please make sure to have necessary overheat protection on locally supplied solar thermal system side to secure safety, as the tank temperature coulld be much higher (than current).

SW1

SW3

SW4

SW2

SW5

SW5-3 SW5-4 SW5-5 SW5-6 SW5-7 E*SC-*M*C ON ON ON ON OFF E*SD-*M*C ON OFF OFF ON OFF EHPX-*M*C OFF OFF OFF OFF OFF

Capacity code

OCH571

Page 16

TB1

ECB1

TB1

ECB1

FIELD WIRING

Breaker abbreviation Meaning

ECB1 Earth leakage circuit breaker for booster heater TB1 Terminal block 1

Earth

leakage

circuit

breaker

Outdoor unit

Power

supply ~/ N 230 V 50 Hz

Wiring

circuit

breaker or

Isolating

switch

To control board

For booster heater (Primary circuit)

Hydrobox

Wiring

circuit

breaker or

Isolating

switch

Power

supply ~/N 230 V 50 Hz

Earth

leakage

circuit

breaker

Outdoor unit

Power supply 3~ 400 V 50 Hz (EH**-YM9(E)C) 3~ 230 V 50 Hz (EHSC-TM9C)

Wiring

circuit

breaker or

Isolating

switch

To control board

For booster heater (Primary circuit)

Hydrobox

Wiring circuit

breaker or

Isolating

switch

Power

supply 3N~ 400 V 50 Hz

Option 1: Hydrobox powered via outdoor unit

<1 phase>

Electrical connections 1 phase

Description

Power supply

Capacity

Breaker Wiring

Booster heater (Primary circuit)

~/N 230 V

50 Hz

2 kW 16 A *1 2.5 mm² 6 kW 32 A *1 6.0 mm²

*1 If the installed earth leakage circuit breaker does

not have an over-current protection function, install a

breaker with that function along the same power line.

<3 phase>

Electrical connections 3 phase

Wiring

Wiring No.

× size (mm²)

Hydrobox - Outdoor unit *2 3 × 1.5 (polar)

Hydrobox - Outdoor unit earth *2 1 × Min. 1.5

Circuit

rating

Hydrobox - Outdoor unit S1 - S2 *3 230 V AC

Hydrobox - Outdoor unit S2 - S3 *3 24 V DC

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.

*2. Max. 45 m

If 2.5 mm² used, Max. 50 m If 2.5 mm² used and S3 separated, Max. 80 m

*3. The values given in the table above are not always measured against the ground value.

Notes: 1. Wiring size must comply with the applicable local and national codes.

2.Indoorunit/outdoorunitconnectingcordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60245IEC57) Indoorunitpowersupplycordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60227IEC53)

3. Install an earth longer than other cables.

4.Pleasekeepenoughoutputcapacityofpowersupplyforeachheater.Insufcientpowersupplycapacitymightcausechattering.

*1 If the installed earth leakage circuit breaker does

not have an over-current protection function, install

a breaker with that function along the same power

line.

Afx label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.

Description

Power supply

Capacity

Breaker Wiring

Booster heater (Primary circuit)

3~ 400 V

50 Hz

9 kW 16 A *1 2.5 mm²

3~ 230 V

50 Hz

9 kW 32 A *1 6.0 mm²

OCH571

Page 17

CN01

TB1

ECB1

TB1

ECB1

For booster heater (Primary circuit)

To control board

Outdoor unit

Wiring circuit

breaker or

Isolating

switch

Earth

leakage

circuit

breaker

Power

supply ~/ N 230 V 50 Hz

Power

supply ~/ N 230 V 50 Hz

Earth

leakage

circuit

breaker

Wiring circuit

breaker or

Isolating

switch

Wiring

circuit

breaker or

Isolating

switch

Power

supply ~/ N 230V 50Hz

Hydrobox

Initial settings

(Power supplied

by outdoor unit)

Modied settings

(Separate power

supply to

the hydrobox)

BLACK

YELLOW

BLACK

YELLOW

BLACK

Hydrobox

control board

White

Earth

leakage

circuit

breaker

Outdoor unit

Power

supply 3N~ 400 V 50 Hz

Wiring

circuit

breaker or

Isolating

switch

To control board

For booster heater (Primary circuit)

Hydrobox

Wiring

circuit

breaker or

Isolating

switch

Power

supply ~/ N 230 V 50 Hz

Earth

leakage

circuit

breaker

Wiring circuit

breaker or

Isolating

switch

Power supply

3~ 400 V 50 Hz (EH**-YM9(E)C) 3~ 230 V 50 Hz (EHSC-TM9C)

Hydrobox

control board

Option2: Hydrobox powered by independent source

If the hydrobox and outdoor units have separate power supplies, the following requirements

MUST be carried out:

•Changeconnectorconnectionsinhydroboxcontrolandelectricalbox(seeFigure7-3).

•TurntheoutdoorunitDIPswitchSW8-3toON.

•TurnontheoutdoorunitBEFOREthehydrobox.

•Power by independentsourceis not availableforparticular models ofoutdoorunit

model. For more detail, refer to the connecting outdoor unit installation manual.

<1 phase>

Electrical connections 1 phase

*1 If the installed earth leakage circuit breaker does

not have an over-current protection function, install a

breaker with that function along the same power line.

<3 phase>

Electrical connections 3 phase

Hydrobox power supply ~/N 230 V 50 Hz

Hydrobox input capacity

Main switch (Breaker)

16 A

Wiring

Wiring No.

× size (mm²)

Hydrobox power supply 2 × Min. 1.5 Hydrobox power supply earth 1 × Min. 1.5

Hydrobox - Outdoor unit *2 2 × Min. 0.3 Hydrobox - Outdoor unit earth —

Circuit

rating

Hydrobox L - N *3 230 V AC

Hydrobox - Outdoor unit S1 - S2 *3 — Hydrobox - Outdoor unit S2 - S3 *3 24 V DC

Notes: 1. Wiring size must comply with the applicable local and national codes.

3. Install an earth longer than other cables.

4.Pleasekeepenoughoutputcapacityofpowersupplyforeachheater.Insufcientpowersupplycapacitymightcausechattering.

*1 If the installed earth leakage circuit breaker does not

have an over-current protection function, install a breaker

with that function along the same power line.

*1. A breaker with at least 3.0 mm contact separation in each pole

shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.

*2. Max. 120 m

*3. The values given in the table above are not always measured

against the ground value.

Afx label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.

Description Power supply

Capacity

Breaker

Wiring

Booster heater (Primary circuit)

3~ 400 V

50 Hz

9 kW 16 A *1 2.5 mm²

3~ 230 V

50 Hz

9 kW 32 A *1 6.0 mm²

Description Power supply

Capacity

Breaker

Wiring

Booster heater (Primary circuit)

~/N 230 V

50 Hz

2 kW 16 A *1 2.5 mm² 6 kW 32 A *1 6.0 mm²

OCH571

Page 18

WATER SYSTEM DIAGRAM

Note

• Be sure to follow your local regulations to perform system conguration of the DHW connec-

tions.

• DHW connections are not included in the hydrobox package. All required parts are to be

sourced locally.

• To enable draining of the hydrobox an isolating

valve should be positioned on both the inlet and

outlet pipework.

• Be sure to install a strainer on the inlet pipe work to the hydrobox.

• Suitable drain pipework should be attached to all relief valves in accordance with your country's regulations.

• A backow prevention device must be installed on water supply pipework (IEC 61770).

• When using components made from different metals or connecting pipes made of different

metals insulate the joints to prevent a corrosive

reaction taking place which will damage the pipework.

<EHS*> (Split model system) <ERS*> (Split model system for heating and cooling)

<EHPX> (Packaged model system)

Local

system

Refrigerant pipe

Water supply

DHW

Drain

Cold

water

Cold

water

Water pipe

Hydrobox

Flare connections

Local

system

No.

Part name

EHS*MEC

EHS**M*C

EHSC*M*EC

ERS*VM2C

ERSCMEC

EHPX*M*C

Control and electrical box

2 Main controller

Plate heat exchanger (Refrigerant - Water)

Water circulation pump 1

5 Pump valve

Drain cock (Primary circuit)

7 Booster heater 1, 2

- -

8 Flow sensor

9 Manometer

Pressure relief valve (3 bar)

11 Automatic air vent

12 Expansion vessel

- - -

13 Strainer valve

14 Drain pan

- - - -

15 THW1

16 THW2

17 TH2

THW5 (Optional part PACTH011TK-E or PAC-

TH011TKL-E)

- - - - - -

19 Outdoor unit

- - - - - -

Drain pipe (Local supply)

- - - - - -

3-way valve (Local supply)

- - - - - -

DHW indirect unvented

tank (Local supply)

- - - - - -

Cold water inlet pipe (Local supply)

- - - - - -

DHW outlet pipe

(Local supply)

- - - - - -

Back ow prevention device (Local supply)

- - - - - -

Isolating valve (Local supply)

- - - - - -

Magnetic lter (Local supply)

(Recommended)

- - - - - -

28 Strainer (Local supply)

- - - - - -

*1 Refer to the following section [Local system].

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Page 19

1-zone temperature control

2-zone temperature control 1-zone temperature control with boiler

2-zone temperature control with boiler

1-zone temperature control (2-zone valve ON/OFF control)

Local system

Zone1

Zone2

Zone1

Zone2

Flow switch specications: DC12 V / 1 mA / Both normally-open and normally-closed types can be used. (Set DIP switch 3 to select the logics. Refer to “ 6-6 DIP switch setting”.)

1. Zone1 heat emitters (e.g. radiator, fan coil unit) (local supply)

2. Mixing tank (local supply)

3. Zone1 ow water temp. thermistor (THW6)

4. Zone1 return water temp. thermistor (THW7)

5. Zone1 water circulation pump (local supply)

6. Zone1 ow switch (local supply) *

7. Motorized mixing valve (local supply)

8. Zone2 ow water temp. thermistor (THW8)

9. Zone2 return water temp. thermistor (THW9)

Optional part : PAC-TH011-E

10. Zone2 water circulation pump (local supply)

11. Zone2 ow switch (local supply) *

12. Zone2 heat emitters (e.g. underoor heating) (local supply)

13. Boiler ow water temp. thermistor (THWB1)

14. Boiler return water temp. thermistor (THWB2)

15. Boiler

16. Zone1 2-way valve (local supply)

17. Zone2 2-way valve (local supply)

18. Bypass valve (local supply)

Optional part : PAC-TH011HT-E

Zone1

Zone2

OCH571

Page 20

1. Check all connections including factory tted ones are tight.

2. Insulate pipe work between hydrobox and outdoor unit.

3. Thoroughly clean and ush, system of all debris. (Refer to 4.2 in the installation manual.)

4. Fill primary heating circuit with water and suitable anti-freeze and inhibitor as necessary. Always usea llingloop withdoublecheck valvewhen llingthe

primarycircuittoavoidbackowcontaminationofwatersupply.

•

Anti-freeze should always be used for package systems. It is the responsibility of the installer to decide if anti-freeze solution should be used in split systems depending on each site’s conditions. Corrosion inhibitor should be used in both split and package systems.

•

When connecting metal pipes of different materials insulate the joints to prevent a corrosive reaction taking place which will damage the pipework.

5. Check for leaks. If leaks are found, retighten the screws on the connections.

6. Pressurise system to 1 bar.

7. Release all trapped air using air vents during and following heating period.

8. Top up with water as necessary. (If pressure falls below 1 bar)

Filling the System (Primary Circuit)

Draining the Hydrobox

WARNING: DRAINED WATER MAY BE VERY HOT

1. Before attempting to drain the hydrobox islolate from the electrical supply to prevent booster heater burning out.

2. Isolate hydrobox from primary water circuit and drain water from hydrobox. Use a suitable heat resistant hose to assist in these operations.

3. Drain any remaining water from booster heater using tted drain cock and hose, and the drain valve on the primary circuit to safely drain the unit.

4. After the hydrobox is drained, water remains in the following component parts. Drain water completely by checking the inside of the parts.

• Strainer (Remove the strainer cover.)

• Pressure relief valve (Operate the valve.)

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Page 21

CONTROLS

9-1. Main Controller

F1 F2 F3 F4

B C D

Main screen

Letter Name Function

A Screen Screen in which all information is displayed B Menu Access to system settings for initial set up and

modications.

C Back Return to previous menu. D Conrm Used to select or save. (Enter key) E Power/Holiday If system is switched off pressing once will turn

system on. Pressing again when system is switched on will enable Holiday Mode. Holding the button down for 3 secs will turn the system off. (*1)

F1-4 Function keys Used to scroll through menu and adjust settings.

Function is determined by the menu screen visible on screen A.

*1 When the system is switched off or the power supply is disconnected, the hydrobox protection functions (e.g. freeze stat. function) will NOT operate. Please beware that without these safety functions enabled the hydrobox may potentially become exposed to damage.

Icon Description

1 Legionella

prevention

When this icon is displayed ‘Legionella prevention mode’ is active.

2 Heat pump

‘Heat pump’ is running.

Defrosting

Emergency heating

3 Electric heater When this icon is displayed the ‘Electric heaters’

(booster or immersion heater) are in use.

4 Target

temperature

Target ow temperature

Target room temperature

Compensation curve

5 OPTION Pressing the function button below this icon will dis-

play the option screen. 6 + Increase desired temperature. 7 - Decrease desired temperature. 8 Z1

Z2 Pressing the function button below this icon switch-

es between Zone1 and Zone2.

Information Pressing the function button below this icon displays

the information screen. 9 Space heat-

ing/cooling

mode

Heating mode

Zone1 or Zone2

Cooling mode

10 DHW mode Normal or ECO mode 11 Holiday mode

When this icon is displayed ‘Holiday mode’ activated.

12 Timer

Prohibited

Server control

Stand-by

Stand-by (*2)

Stop

Operating

Current temperature

Current room temperature

Current water temperature of DHW tank

The Menu button is locked or the switching of the

operation modes between DHW and Heating opera-

tions are disabled in the Option screen.(*3)

SD memory card is inserted. Normal operation.

SD memory card is inserted. Abnormal operation.

*2 This unit is in Stand-by whilst other indoor unit(s) is in operation by

priority.

*3 To lock or unlock the Menu, press the BACK and CONFIRM keys

simultaneously for 3 seconds.

12 11

1 32

15 14

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Page 22

9-2. Setting the Main Controller

After the power has been connected to the outdoor and hydrobox (See section 7) the initial system settings can be entered via the main controller.

1. Check all breakers and other safety devices are correctly installed and turn on power to the system.

2. When the main controller switched on for the rst time, the screen automatically goes to Initial settings menu, Language setting screen and Date/Time setting

screen in order.

3. Main controller will automatically start up. Wait approximately 6 minutes whilst the control menus load.

4. When the controller is ready a blank screen with a line running across the top will be displayed.

5. Press button E (Power) (refer to page 21) to turn on the system. Before turning on the system, perform initial settings as instructed below.

General Operation

● To nd the icon that you wish to set, use the F2 and F3 buttons to move between the icons.

● The highlighted icon will appear as a larger version of the center of the screen.

● Press CONFIRM to select and edit the highlighted mode.

●

Follow the <Main Controller Menu Tree> for further setting, using

▼

buttons for scrolling or F1 to F4 for selecting.

9-3. Main Settings Menu

The main settings menu can be accessed by pressing the MENU button. To reduce the risk of untrained end users altering the settings accidentally there are two access levels to the main settings; and the service section menu is password

protected.

User Level – Short press

If the MENU button is pressed once for a short time the main settings will be displayed but without the edit function. This will enable the user to view current settings but NOT change the parameters.

Installer Level – Long press

If the MENU button is pressed down for 3 secs the main settings will be displayed with all functionality available.

The following items can be viewed and/or edited (dependent on access level).

• Domestic Hot water (DHW)

• Heating/Cooling

• Schedule timer

• Holiday mode

• Initial settings

• Service (Password protected)

Main menu

Long Press

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Page 23

Unrestricted access

Installer only

Shaded items relate to DHW functions. These are only available if the system includes a DHW tank.

* Short press for 1 Zone system.

Schedule

timer preview

Schedule

timer preview

Schedule

timer preview

Schedule

timer preview

Schedule

timer preview

Schedule

timer preview

Schedule

timer preview

Main

Main screen

Initial

Information

Option

Forced DHW

Hot Water (DHW)

<See

section>

<See

section>

<See

section>

<See

section>

Long Press

Short Press

Heating/Cooling

Holiday

mode

Initial

settings

Schedule timer

(Zone1)

(Zone2)

(

PREVIEW

)

(

EDIT

)

(

EDIT

)

(

EDIT

)

(

EDIT

)

DHW

Legionella

Schedule2 period

preview screen

Schedule2 period setting screen1

Term setting

Schedule1/2 select

Schedule

timer preview

Schedule timer preview

Zone1

Zone2

Curve parameters

Adjustment

Zone1

Zone2

Day select

Time select

Temp.setting

Schedule1

Schedule2

Heating

DHW

ON (

)/OFF

DHW ON (

)/Prohibited ( )/Timer ( )

Heating/Cooling ON (

)/Prohibited ( )/Timer ( )

Energy monitor

Consumed electrical energy

Delivered energy

Normal/Eco

DHW max. temp.

Hot water temp.

Frequency Start time Max. operation time Duration of max. temp.

DHW max. temp. drop DHW max. operation time DHW mode restriction

Active/Non active

Heating room temp.( ) / Heating ow temp.(

)

/ Heating compensation curve(

) / Cooling ow temp.

Heating room temp.(

) / Heating ow temp.(

)

/ Heating compensation curve(

) / Cooling ow temp.

Compensation curve preview

Compensation curve edit

F2 F4

DHW

Date/Time yyyy/mm/dd/hh:mm

EN/FR/DE/SV/ES/IT/DA/NL/FI/NO/PT/BG/PL/CS/RU

OFF/Room/Tank/Room&Tank

OFF/ON

hh:mm/hh:mm AM/AM hh:mm

°C/°F

Room RC zone select

Sensor setting

Zone1

Zone2

Holiday mode setting

Heating room temp.

Heating ow temp.

Zone2

Sensor setting

Select Time/Zone

TH1/Main controller/ Room RC1-8/ “Time/ Zone”

Time setting

Sensor setting

Language

Summer time

Temp. display

Contact number

Time display

°C/°F

Room sensor settings

Heating/ Cooling

Active/Non active Active/Non active

Long press

(

EDIT

)

F1 F2

Zone1/2 select

F1 F2

Zone1/2 select

Zone1/2 select

F1 F2

Zone1/2 select

save

Cooling ow temp.

Time select

Temp.setting

Time select

Temp.setting

Time select

Temp.setting

Time select

Cooling

Zone1

Zone2

Day select

Time select

Temp.setting

Zone1/2 select

save

Time select

Temp.setting

Cooling

Zone1

Zone2

Day select

Time select

Temp.setting

Zone1/2 select

save

Time select

Temp.setting

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Page 24

Unrestricted access

Installer only

Shaded items relate to DHW functions. These are only available if the system includes a DHW tank.

Long press

Main screen

Initial

Main menu

Service

Password

protected

Manual operation

Function settings

Thermistor adjustment

Economy settings for pump

Electric heater (Heating)

Electric heater (DHW)

Mixing valve control

Flow sensor

Standard (Heat pump & electric heater)/Heater (Electric heater only)/ Boiler/Hybrid (Heat pump & heater/Boiler)

Freeze stat function

Simultaneous operation

Cold weather function

Boiler settings *1

Energy monitor settings

External input settings

Running information

Thermistor reading

Summary of settings

Error history

Password protection

Manual reset

SD card

Heating

operation

H/P thermo diff.adjust

Flow temp.range

Room temp.control

Auxiliary settings

Heat source setting

Pump speed

Operation settings

ON/OFF Delay

Running

Interval

Flow t.

Ambient

ON/OFF Ambient

ON/OFF

Hybrid

settings

Ambient

Energy

price

emission

Heat source

Schedule

Electricity

Heat pump capacity

ON/OFF

Electric heater capacity

Demand control (IN4)

Main controller

Yes/No

Select download data

OFF (Heat source)/Boiler

Heater/Boiler

Outdoor thermostat (IN5)

FTC

Main RC SD

Yes/No

Select upload data

Water pump input

Electric energy meter

Booster heater 1 capacity

Pump 1

Booster heater 2 capacity

Pump 2

Immersion heater

Pump 3

Boiler

Boiler efciency

Target temp.

Start & Finish

Temp. increase step

Temp. decrease step

Max. temp. Max. temp. period

Increase interval

Decrease interval

Booster heater 2 capacity

Booster heater 1 capacity

Flow temp.

(Increase)

Flow temp.

(Decrease)

Priority Ambient/

Cost /CO

Ambient

Intelligent settings

Min.temp.

ON/OFF

Mode Interval

Max.temp.

Lower limit

Upper limit

Minimum Maximum

Delay

ON/OFF

(Booster heater/Immersion heater)

*1 For more details, refer to the installation manual of PAC-TH011HT-E.

Floor dry up function

For more details,

refer to Page 28.

(

F1 F2 F3

Long Press

Delivered energy adjustment

Heat meter

Main RC

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Page 25

The service menu provides functions for use by installer or service engineer. It is NOT intended the home owner alters settings within this menu. It is for this reason password protection is required to prevent unauthorised access to the service settings.

The factory default password is "0000". Follow the procedure described in General Operation for the set up operation.

The service menu is navigated using the F1 and F2 buttons to scroll through the functions. The menu is split across two screens and is comprised of the following functions;

1. Manual operation

2. Function settings

3. Thermistor adjustment

4. Auxiliary settings

5. Heat source setting

6. Pump speed

7. Operation settings

8. Energy monitor settings

9. External input settings

10. Running information

11. Thermistor reading

12. Summary of settings

13. Error history

14. Password protection

15. Manual reset

16. SD card

9-4. Service Menu

During the lling of the system the water circulation pump and 3-way valve can be manually overridden using manual operation mode.

When manual operation is selected a small timer icon appears in the screen.

The function selected will only remain in manual operation for a maximum of 2

hours. This is to prevent accidental permanent override of the FTC.

►Example Pressing F3 button will switch manual operation mode ON for the main 3-way valve. When lling of the DHW tank is complete the installer should access this menu again and press F3 to deactivate manual operation of the part. Alternatively after 2 hours manual operation mode will no longer be active and FTC will resume control of the part.

Many functions can not be set whilst the indoor unit is running. The installer should turn off the unit before trying to set these functions. If the installer attempts to change the settings whilst the unit is running the main controller will display a reminder message prompting the installer to stop operation before continuing. By selecting “Yes” the unit will cease operation.

Manual operation and heat source setting can not be selected if the system is running. A screen will be displayed asking the installer to stop the system

before these modes can be activated. The system automatically stops 2 hours after last operation.

Being

selected

Being running Error

indication

Manual operation menu screen

Function Setting allows the setting of auto recovery after power failure only.

1. From the service menu use F1 and F2 to highlight Function Setting.

2. Press CONFIRM.

3. Ensure the Ref address and unit number are displayed to the right.

4. Press CONFIRM.

5. Use F3 and F4 to highlight either 1/2/3 (see below). Note: Changes can ONLY be made to Mode 1.

6. Press CONFIRM.

Mode 1 Setting number meanings 1 - Power failure automatic recovery NOT available 2 - Power failure automatic recovery AVAILABLE

(Approx 4-minute delay after power is restored.)

3 - NO FUNCTION

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▼

▲

This function allows adjustments to be made to the thermistor readings from

-10 – 10 °C in 0.5 °C intervals.

THW1: Thermistor (Flow water temp.) THW2: Thermistor (Return water temp.) THW5: Thermistor (DHW tank water temp.)(Option) THW6: Thermistor (Zone1 ow temp.)(Option) THW7: Thermistor (Zone1 return temp.)(Option) THW8: Thermistor (Zone2 ow temp.)(Option) THW9: Thermistor (Zone2 return temp.)(Option) THWB1: Thermistor (Boiler ow temp.)(Option) THWB2: Thermistor (Boiler return temp.)(Option)

This function is used to set the parameters for any auxiliary parts used in the system

Menu subtitle Function/ Description

Economy settings for

pump

Water pump stops automatically in certain period of time from

when operation is nished.

Delay Time before pump switched off*1

Electric heater

(Heating)

To select “WITH booster heater (ON)” or “WITHOUT booster

heater (OFF)” in Heating mode.

Delay The minimum time required for the booster heater to turn ON

from after Heating mode has started.

Electric heater (DHW) To select "WITH (ON)" or "WITHOUT (OFF)" booster heater or

immersion heater individually in DHW mode.

Delay The minimum time required for the booster heater or immersion

heater to turn ON from after DHW mode has started. (This

setting is applied for both booster and immersion heater.)

Mixing

valve control *2

Running Period from valve fully open (at a hot water mixing ratio of 100%)

to valve fully closed (at a cold water mixing ratio of 100%)

Interval Interval (min) to control the Mixing valve.

Flow

sensor *3

Minimum The minimum ow rate to be detected at Flow sensor. Maximum The maximum ow rate to be detected at Flow sensor.

*1. Decreasing "time before pump switched off" may increase the duration of stand-by in

Heating/Cooling mode.

*2.

Set the Running time according to the specications of the actuator of each mixing valve.

It is recommended to set the interval to 2 minutes that is a default value. With the interval

set longer, it could take longer to warm up a room.

*3.

Do not change the setting since it is set according to the specication of Flow sensor

attached to the hydrobox.

Economy settings for pump

1. From the Auxiliary settings menu highlight Economy Settings for water circulation pump.

2. Press CONFIRM.

3. The economy settings for water circulation pump screen is displayed.

4. Use button F1 to switch the economy settings ON/OFF.

5. Use buttons F3 and F4 to adjust the time the water circulation pump will run. (3 - 60

minutes)

Auxiliary settings menu screen

Electric heater (Heating) screen

Electric heater (DHW) screen

Electric heater (Heating)

1. From the Auxiliary settings menu highlight Electric heater (Heating).

2. Press CONFIRM.

3. The Electric heater (Heating) screen is displayed.

4. Press F1 button to switch the function ON/OFF.

5. Use F3 and F4 buttons to adjust the time period of heat pump only operation

before the booster heater will assist in space heating. (5 -180minutes)

Electric heater (DHW)

1. From the Auxiliary settings menu highlight Electric heater (DHW).

2. Press CONFIRM.

3. The Electric heater (DHW) screen is displayed.

4. Press F1 button to switch the function ON/OFF.

5. Use F3 and F4 buttons to adjust the time period of heat pump only operation

before the booster heater and the immersion heater (if present) will assist in DHW heating. (15 -30minutes)

Economy settings for pump screen

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Mixing valve control

1. From the Auxiliary settings menu highlight Mixing valve control.

2. Press CONFIRM.

3. The Mixing valve control screen is displayed.

4. Use F1 and F2 buttons to set Running time between 10 to 240 seconds. The Running time equals to a period from full open of the valve (at a hot water mixing ratio of 100%) to full close (at a cold water mixing ratio of 100%).

Note: Set the Running time according to the specifications of the actuator

of each mixing valve.

1. From the Auxiliary settings menu highlight Mixing valve control.

2. Press CONFIRM.

3. The Mixing valve control screen is displayed.

4. Press F3 and F4 buttons to set the interval between 2-zone temperature controls of the mixing valve between 1 to 30 minutes.

Note: It is recommended to set the interval to 2 minutes that is a default

value. With the interval set longer, it could take longer to warm up a room.

Mixing valve setting screen

Pump speed setting screen

1. From the Service menu highlight water pump speed.

2. Press CONFIRM.

3. Press F3 and F4 buttons to select a refrigerant address of which you wish to congure or check the settings, and press CONFIRM. *1

4. The Pump speed screen is displayed.

5. Use F2 and F3 buttons to set the pump speed of the water circulation pump between 1 and 5.

*1 For multiple outdoor units control system only.

Heat source setting screen

The default heat source setting is heat pump and all electric heaters present in

the system to be operational. This is referred to as Standard operation on the menu.

Flow sensor

1. From the Auxiliary settings menu highlight Flow sensor.

2. Press CONFIRM.

3. Press F3 or F4 buttons to select a refrigerant address of which you wish to congure or check the settings, and press CONFIRM. *1.

4. The Flow sensor screen is displayed.

5. Use F1 and F2 buttons to set the minimum ow rate of ow sensor between 0 to maximum L/min.

6. Use F1 and F2 buttons to set the maximum ow rate of ow sensor between minimum to 100L/min.

*1 For multiple outdoor units control system only.

Note: Do not change the setting since it is set according to the

specification of Flow sensor attached to the hydrobox.

Flow sensor setting screen

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Page 28

Freeze stat function

Menu subtitle Function/ Description Freeze stat function An operational function to prevent the water circuit from freezing when outdoor ambient temperature drops.

Flow t. The target outlet water temperature at water circuit when operating in Freeze stat function. *2

Outdoor ambient temp. Minimum outdoor ambient temperature which freeze stat function will begin to operate,

(3 - 20ºC) or choose**. If asterisk (**) is chosen freeze stat function is deactivated. (i.e. primary water freeze risk)"

*1. When the system is turned off, freeze stat function is not enabled.

*2. Flow t. is xed to 20°C and unchangeable.

Simultaneous Operation

For periods of very low outside temperature this mode can be used. Simultaneous operation allows both DHW and space heating to run together by using the heat pump and/or booster heater to provide space heating whilst only the immersion heater provides heating for DHW. This operation is only available if BOTH a DHW tank AND

immersion heater are present on the system.

Heating operation

This function allows operational setting of ow temperature range from the Ecodan and also the time interval at which the FTC collects and processes data for the auto

adaptation mode.

Menu subtitle Function Range Unit Default Flow temp. range Minimum temp. To minimize the loss by frequent ON and OFF in mild outdoor ambient tem-

perature seasons.

25 - 45 ºC 30

Maximum temp. To set max. possible ow temperature according to the type of heat emitters. 35 - 60 ºC 50

Room temp. control Mode Setting for Room temp. control

At Fast mode, target outlet water temperature is set higher than the one set at normal mode. This reduces the time to reach the target room temperature when the room temperature is relatively low.*3

Normal/ Fast

-- Normal

Interval Selectable according to the heat emitter type and the materials of oor (i.e.

radiators, oor heating-thick, -thin concrete, wood, etc.)

10 ~ 60

minutes

Heat pump thermo diff.adjust On/Off To minimize the loss by frequent ON and OFF in mild outdoor ambient tem-

perature seasons.

On/Off — On

Lower limit Prohibits heat pump operation until the flow temperature drops below the

target ow temperature plus lower limit value.

−9 - −1 ºC −5

Upper limit Allows heat pump operation until the ow temperature rises above the target

ow temperature plus upper limit value.

+3 - +5 ºC +5

< Heating operation (Room temp. control table) >

Note:

1. The minimum ow temperature that prohibits heat pump operation is 20ºC.

2. The maximum ow temperature that allows heat pump operation equals to the maximum temperature set in the Flow temp. range menu.

* Fast mode is not efcient and will increase running cost compared to normal mode.

• Range of outdoor ambient temperature at which simultaneous operation starts is −30°C to 10°C (default −15°C).

• System shall automatically return to routine operation. This will happen when the outdoor ambient temperature rises above the selected temperature for this specic mode of operation.

Cold weather function

For extremely low outdoor ambient temperature conditions when the heat pump’s capacity is restricted the heating or DHW is provided only by the electric booster heater (and immersion if present). This function is intended for use during extreme cold periods only. Extensive use of direct electrical heaters ONLY will result in higher power consumption and may reduce working life of heaters and related parts.

Floor dry up function

The Floor dry up function automatically changes the target hot water temperature in stages to gradually dry concrete when this particular type of underoor heating

system is installed.

Upon completion of the operation the system stops all the operations except the

Freeze stat. operation.

For Floor dry up function, the target ow temp. of Zone 1 is the same as that of

Zone 2.

Functions Symbol Description Option/Range Unit Default

Floor dry up function a

Set the function to ON and power on the system using the main controller, and the dry up heating operation will start.

On/Off — Off

Flow temp.

(increase)

Flow temp. increase step b Sets the increase step of the target ow temperature. +1 - +10 ºC +5 Increase interval c Sets the period for which the same target ow temperature is maintained. 1 - 7 day 2

Flow temp.

(decrease)

Flow temp. decrease step d Sets the decrease step of the target ow temperature. −1 - −10 ºC −5 Decrease interval e Sets the period for which the same target ow temperature is maintained. 1 - 7 day 2

Target

temperature

Start & Finish f Sets the target ow temperature at the start and the nish of the operation. 25 - 60 ºC 30 Max. target temp. g Sets the maximum target ow temperature. 25 - 60 ºC 45

Max. temp. period h

Sets the period for which the maximum target ow temperature is maintained.

1 - 20 day 5

0 1 2 3 4 5 6 7 8 9 10111213 1415 16 1718

(

°C

)

(b)

(d)

(h)

(c)

(f)

(e)

(g)

Days

Target ow temp.

• This function is not available when a PUHZ-FRP outdoor unit is connected.

• Disconnect wiring to external inputs of room thermostat, demand control, and outdoor thermostat, or the target ow temperature may not be maintained.

• Range of outdoor ambient temperature at which cold weather function starts is −30°C to −10°C (default −15°C).

• System shall automatically return to routine operation. This will happen when

the outdoor ambient temperature rises above the selected temperature for

this specic mode of operation.

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2. Settings using the main controller

In this menu, all parameters required to record the consumed electrical energy and the delivered heat energy which is displayed on the main controller can be set. The parameters are an electric heater capacity, supply power of water pump and heat

meter pulse.

Follow the procedure described in General Operation for the set up operation.

For Pump 1, *** can be also set besides this setting. In the case *** is selected, the system acknowledges "factory tted pump" is se-

lected.

Energy monitor settings menu screen

1. General description

End user can monitor accumulated*1 ‘Consumed electrical energy’ and ‘Delivered heat energy’ in each operation mode*2 on the main controller. *1 Monthly and Year to date *2 - DHW operation

- Space heating

- Space cooling

Refer to the menu tree in “9-3. Main Settings Menu” for how to check the energy, and “6-6. DIP switch setting” for the details on DIP-SW setting. Either one of the following two method is used for monitoring.

Note: The method (1) should be used as a guide. If a certain accuracy is required, the method (2) should be used.

(1) Calculation internally

Electricity consumption is calculated internally based on the energy consumption of outdoor unit, electric heater, water pump(s) and other auxiliaries. Delivered heat is calculated internally by multiplying delta T (Flow and Return temp.) and flow rate measured by the factory fitted sensors. Set the electric heater capacity and water pump(s) input according to indoor unit model and specs of additional pump(s) supplied locally. (Refer to the menu tree in “9-3. Main Settings Menu”)

Booster heater1 Booster heater2

Immersion

heater*1

Pump1*2 Pump2 Pump3

Defult 2kW 4kW 0kW

***(factory tted pump)

0kW 0kW

EHSD-MEC 0kW 0kW 0kW *1 ***

When additional pumps supplied locally are

connected as Pump2/3, change setting according to specs of the pumps.

EHSD-VM2C 2kW 0kW 0kW ***

EHSC-MEC 0kW 0kW 0kW *1 ***

EHSC-VM2C 2kW 0kW 0kW *1 ***

EHSC-VM2EC 2kW 0kW 0kW *1 ***

EHSC-VM6C 2kW 4kW 0kW *1 ***

EHSC-VM6EC 2kW 4kW 0kW *1 ***

EHSC-YM9C 3kW 6kW 0kW *1 ***

EHSC-YM9EC 3kW 6kW 0kW *1 ***

EHSC-TM9C 3kW 6kW 0kW *1 ***

ERSD-VM2C 2kW 0kW 0kW *1 ***

ERSC-MEC 0kW 0kW 0kW *1 ***

ERSC-VM2C 2kW 0kW 0kW *1 ***

EHPX-VM2C 2kW 0kW 0kW *1 ***

EHPX-YM9C 3kW 6kW 0kW *1 ***

*1 Change setting to 3kW when connecting optional immersion heater "PAC-IH03V2-E". *2 "***" displayed in the energy monitor setting mode means the factory tted pump is connected as Pump 1 so that the input is automatically calculated.

When anti-freeze solution (propylene glycol) is used for primary water circuit, set the delivered energy adjustment if necessary. For further detail of above, refer to the menu tree in “9-3. Main Settings Menu”.

(2) Actual measurement by external meter (locally supplied)

FTC has external input terminals for 2 ‘Electric energy meters’ and a ‘Heat meter’. If two ‘Electric energy meters’ are connected, the 2 recorded values will be combined at the FTC and shown on the main controller. (e.g. Meter 1 for H/P power line, Meter 2 for heater power line) Refer to the [Signal inputs] in section “6. WIRING DIAGRAM” for more information on connectable electric energy meter and heat meter.

● Connectable electric energy meter and heat meter

▪

Pulse meter type

Voltage free contact for 12VDC detection by FTC (TBI.3 1, 3 and 5 pin have a positive voltage.)

▪

Pulse duration

Minimum ON time: 40ms Minimum OFF time: 100ms

▪

Possible unit of pulse

0.1 pulse/kwh 1 pulse/kwh 10 pulse/kwh 100 pulse/kwh 1000 pulse/kwh

Those values can be set by the main controller. (Refer to the menu tree in "9-3. Main Settings Menu".)

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This function shows current temperature and other data of main component parts

of both the indoor and outdoor units.

1. From the Service menu highlight Running information.

2. Press CONFIRM.

3. Press F3 and F4 buttons to set the Ref. address. *1

4. Use the function buttons to enter index code for the component to be viewed.

(See the Table 9-4-1 for component index codes.)

5. Press CONFIRM.

*1 For multiple outdoor units control system only.

This function shows the current readings of thermistors located on the water and refrigerant circuit

Thermistor Description Thermistor Description

TH1A Zone 1 room temperature THW6 Zone 1 flow water temperature TH1B Zone 2 room temperature THW7 Zone 1 return water temperature TH2 Refrigerant return temperature THW8 Zone 2 flow water temperature THW1 Water flow temperature THW9 Zone 2 return water temperature THW2 Water return temperature THWB1 Boiler flow water temperature THW5 DHW tank water temperature THWB2 Boiler return water temperature TH7 Ambient (outdoor) temperature

External input settings menu screen

Demand control screen

Outdoor thermostat setting screen

Demand control(IN4)

Outdoor thermostat (IN5)

The selection of “OFF”, whilst a signal is being sent to IN4, forcefully stops all

the heat source operations and the selection of “Boiler” stops operations of heat pump and electric heater and performs boiler operation.

The selection of “Heater”, whilst a signal is being sent to IN5, performs

electric-heater-only operation and the selection of “Boiler” performs boiler operation.

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This function shows the current installer/user entered settings.

Abbreviation

Explanation

Abbreviation

Explanation

HWtemp DHW max temperature Z2 mode Operation mode HWdrop DHW temperature drop - HER (Heating room temperature) HWtime DHW max operation time - HE (Heating flow temperature) NO HW DHW mode restriction - HCC (Heating compensation curve) HWset DHW operation mode (Normal/Eco) - COR (—)

- CO (Cooling flow temperature)

Ltemp Legionella hot water temperature Hroom 1 Heating target room temperature Lfreq Legionella operation Frequency Hroom 2 Heating target room temperature Lstart Legionella mode start time Hflow 1 Heating target flow temperature Ltime Legionella max. operation time Hflow 2 Heating target flow temperature Lkeep Duration of max (Legionella) hot

water temperature

Croom 1 Cooling target room temperature Croom 2 Cooling target room temperature

Z1 mode Operation mode Cflow 1 Cooling target flow temperature

- HER (Heating room temperature) Cflow 2 Cooling target flow temperature

- HE (Heating flow temperature) FSflow Freeze stat function flow temperature

- HCC (Heating compensation curve) FSout

Freeze stat function ambient temperature

- COR (—)

- CO (Cooling flow temperature)

Error history allows the service engineer to view previous Error codes, the unit address and the date on which they occurred. Up to 16 Error codes can be stored

in the history the most recent Error event is displayed at the top of the list.

1. From the service menu select Error history

2. Press CONFIRM.

Please see section 10-4. for error code diagnosis and actions.

To delete an Error history item;

1. From Error history screen press F4 button (Rubbish bin icon)

2. Then press F3 button (Yes).

Password input screen

Password verify screen

Password protection is available to prevent unauthorised access to the service

menu by untrained persons.

1. From the service menu use F1 and F2 buttons to scroll through list until Password protection is highlighted.

2. Press CONFIRM.

3. When password input screen is displayed use buttons F1 and F2 to move left and right between the four digits, F3 to lower the selected digit by 1, and F4 to increase the selected digit by 1.

4. When you have input your password press CONFIRM.

5. The password verify screen is displayed.

6. To verify your new password press button F3.

7. Your password is now set and the completion screen is displayed.

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Page 32

The use of an SD memory card simplies the main controller settings in the eld. *Ecodan service tool (for use with PC tool) is necessary for the setting.

SD Main RC

1. From the SD card setting use F1 and F2 buttons to scroll through list until “SD

Main RC” is highlighted.

2. Press CONFIRM.

3. Press F3 and F4 buttons to set the Ref. address. *1

4. Use F1, F2 and F3 buttons to select a menu to write to the main controller.

5. Press CONFIRM to start downloading.

6. Wait for a few minutes until “Complete!” appears.

*1 For multiple outdoor units control system only.

Main RC SD

1. From the SD card setting use F1 and F2 buttons to scroll through list until Main RC

SD is highlighted.

2. Press CONFIRM.

3. Press F3 and F4 buttons to set the Ref. address. *1

4. Use F1, F2 and F3 buttons to select a menu to write to the SD memory card.

5. Press CONFIRM to start uploading.

6. Wait for a few minutes until “Complete!” appears.

*1 For multiple outdoor units control system only.

Completion screen

Resetting the password

If you forget the password you entered, or have to service a unit somebody else installed, you can reset the password to the factory default of 0000.

1. From the main settings menu scroll down the functions until Service Menu is highlighted.

2. Press CONFIRM.

3. You will be prompted to enter a password.

4. Hold down buttons F3 and F4 together for 3 secs

5. You will be asked if you wish to continue and reset the password to default setting.

6. To reset press button F3.

7. The password is now reset to 0000.

Should you wish to restore the factory settings at any time you should use the manual reset function. Please note this will reset ALL functions to the factory default settings.

1. From the service menu use F1 and F2 buttons to scroll through list until Manual Reset is highlighted.

2. Press CONFIRM.

3. The Manual reset screen is displayed.

4. Choose either Manual Reset for FTC or Main Controller.

5. Press F3 button to conrm manual reset of chosen device.

OCH571

Page 33

Note Refer to outdoor unit service manual for request code 0 to 102, 106 to 149. Request codes 103 to 105 indicate error histories of both indoor and outdoor units. As only four digits can be displayed at one time the software version number is displayed in two halves.

Entercode190toseetherstfourdigitsandcode191toseethelastfourdigits.

For example software version No. 5.01 A000, when code 190 is entered 0501 is displayed, when code 191 is entered A000 is displayed.

Request

code

Request content Range Unit

103 Error history 1 (latest) Displays error history. ("– –" is displays if no history is present.) Code 104 Error history 2 (second to last) Displays error history. ("– –" is displays if no history is present.) — 105 Error history 3 (third to last) Displays error history. ("– –" is displays if no history is present.) — 154 Water circulation pump 1 - Accumulated operating time (after reset) 0 - 9999 10 hours 156 Water circulation pump 2 - Accumulated operating time (after reset) 0 - 9999 10 hours 157 Water circulation pump 3 - Accumulated operating time (after reset) 0 - 9999 10 hours 158 Water circulation pump 4 - Accumulated operating time (after reset) 0 - 9999 10 hours 162 Indoor unit - DIP SW1 setting information Refer to detail contents described hereinafter. — 163 Indoor unit - DIP SW2 setting information Refer to detail contents described hereinafter. — 164 Indoor unit - DIP SW3 setting information Refer to detail contents described hereinafter. — 165 Indoor unit - DIP SW4 setting information Refer to detail contents described hereinafter. — 166 Indoor unit - DIP SW5 setting information Refer to detail contents described hereinafter. — 175 Indoor unit - Output signal information Refer to detail contents described hereinafter. — 176 Indoor unit - Input signal information Refer to detail contents described hereinafter. — 177 Mixing valve opening step 0 - 10 Step 190 Indoor unit - Software version 1st 4 digits Refer to Note below. — 191 Indoor unit - Software version last 4 digits Refer to Note below. — 340 Water circulation pump 1 - Accumulated operating time reset — — 342 Water circulation pump 2 - Accumulated operating time reset — — 343 Water circulation pump 3 - Accumulated operating time reset — — 344 Water circulation pump 4 - Accumulated operating time reset — — 504 Indoor unit - Zone 1 room temp. (TH1A) –39 - 88 °C 505 Indoor unit - Ref. liquid temp. (TH2) –39 - 88 °C 506 Indoor unit - Return water temp. (THW2) –39 - 88 °C 507 Indoor unit - Zone 2 room temp. (TH1B) –39 - 88 °C 508 Indoor unit - DHW tank water temp. (THW5) –39 - 88 °C 509 Indoor unit - Zone 1 ow water temp. (THW6) –39 - 88 °C 510 Indoor unit - Outside air temp. (TH7) –39 - 88 °C

511 Indoor unit - Flow water temp. (THW1) –39 - 88 °C 512 Indoor unit - Zone 1 return water temp. (THW7) –39 - 88 °C 513 Indoor unit - Zone 2 flow water temp. (THW8) –39 - 88 °C 514 Indoor unit - Zone 2 return water temp. (THW9) –39 - 88 °C 515 Indoor unit - Boiler flow water temp. (THWB1) –40 - 140 °C 516 Indoor unit - Boiler return water temp. (THWB2) –40 - 140 °C 540 Flow rate of the primary circuit 0 - 100 L/min.

550 Indoor unit - Error postponement history 1 (latest)

Displays postponement code.

("– –" is displays if no postponement code is present.)

—

551 Indoor unit - Operation control at time of error 0 Standard, 1 Heater, 2 Boiler —

552

Indoor unit - Operation mode at time of error 0 OFF, 1 DHW, 2 Heating, 3 Cooling, 4 Legionella prevention,

5 Freeze protection, 6 Operation stop, 7 Defrost

—

553 Indoor unit - Output signal information at time of error Refer to detail contents described hereinafter — 554 Indoor unit - Input signal information at time of error Refer to detail contents described hereinafter — 555 Indoor unit - Zone 1 room temp. (TH1A) at time of error –39 - 88 °C 556 Indoor unit - Zone 2 room temp. (TH1B) at time of error –39 - 88 °C 557 Indoor unit - Ref. liquid temp. (TH2) at time of error –39 - 88 °C 558 Indoor unit - Flow water temp. (THW1) at time of error –39 - 88 °C 559 Indoor unit - Return water temp. (THW2) at time of error –39 - 88 °C 560 Indoor unit - DHW tank water temp. (THW5) at time of error –39 - 88 °C 561 Indoor unit - Zone 1 flow water temp. (THW6) at time of error –39 - 88 °C 562 Indoor unit - Zone 1 return water temp. (THW7) at time of error –39 - 88 °C 563 Indoor unit - Zone 2 flow water temp. (THW8) at time of error –39 - 88 °C 564 Indoor unit - Zone 2 return water temp. (THW9) at time of error –39 - 88 °C 565 Indoor unit - Boiler flow water temp. (THWB1) at time of error –40 - 140 °C 566 Indoor unit - Boiler return water temp. (THWB2) at time of error –40 - 140 °C

567

Indoor unit - Failure (P1/P2/L5/L8/Ld) thermistor 0 Failure thermistor is none, 1 TH1A, 2 TH2, 3 THW1, 4 THW2,

5 THWB1, 6 THW5, 7 THWB2, 8 TH1B, A THW6, B THW7, C THW8, D THW9

—

568 Mixing valve opening step at time of error 0 - 10 Step

569

Operated Flow switch at time of failure (L9) 0 No operated flow switch, 1 Flow switch 1, 2 Flow switch 2,

3 Flow switch 3

—

571 Flow rate at time of error 0 - 100 L/min.

OCH571

Page 34

Indoor unit switch setting display (Request code: 162 to 166)

0: OFF 1: ON

SW1, SW2, SW3, SW4, SW5

Display

1 1 0 0 1 0 0 0 00 13 0 0 1 0 1 0 0 0 00 14 1 0 1 0 1 0 0 0 00 15 0 1 1 0 1 0 0 0 00 16 1 1 1 0 1 0 0 0 00 17 0 0 0 1 1 0 0 0 00 18 1 0 0 1 1 0 0 0 00 19 0 1 0 1 1 0 0 0 00 1A 1 1 0 1 1 0 0 0 00 1B 0 0 1 1 1 0 0 0 00 1C 1 0 1 1 1 0 0 0 00 1D 0 1 1 1 1 0 0 0 00 1E 1 1 1 1 1 0 0 0 00 1F 0 0 0 0 0 1 0 0 00 20 1 0 0 0 0 1 0 0 00 21 0 1 0 0 0 1 0 0 00 22 1 1 0 0 0 1 0 0 00 23 0 0 1 0 0 1 0 0 00 24 1 0 1 0 0 1 0 0 00 25 0 1 1 0 0 1 0 0 00 26 1 1 1 0 0 1 0 0 00 27 0 0 0 1 0 1 0 0 00 28 1 0 0 1 0 1 0 0 00 29 0 1 0 1 0 1 0 0 00 2A 1 1 0

1 0 1 0 0 00 2B 0 0 1 1 0 1 0 0 00 2C 1 0 1 1 0 1 0 0 00 2D 0 1 1 1 0 1 0 0 00 2E 1 1 1 1 0 1 0 0 00 2F 0 0 0 0 1 1 0 0 00 30 1 0 0 0 1 1 0 0 00 31 0 1 0 0 1 1 0 0 00 32 1 1 0 0 1 1 0 0 00 33 0 0 1 0 1 1 0 0 00 34 1 0 1 0 1 1 0 0 00 35 0 1 1 0 1 1 0 0 00 36 1 1 1 0 1 1 0 0 00 37 0 0 0 1 1 1 0 0 00 38 1 0 0 1 1 1 0 0 00 39 0 1 0 1 1 1 0 0 00 3A 1 1 0 1 1 1 0 0 00 3B 0 0 1 1 1 1 0 0 00 3C 1 0 1 1 1 1 0 0 00 3D 0 1 1 1 1 1 0 0 00 3E

1 1 1 1 1 1 0 0 00 3F

0: OFF

1: ON

SW1, SW2, SW3, SW4, SW5

Display

1 0 1 0 1 0 1 0 00 55 0 1 1 0 1 0 1 0 00 56 1 1 1 0 1 0 1 0 00 57 0 0 0 1 1 0 1 0 00 58 1 0 0 1 1 0 1 0 00 59 0 1 0 1 1 0 1 0 00 5A 1 1 0 1 1 0 1 0 00 5B 0 0 1 1 1 0 1 0 00 5C 1 0 1 1 1 0 1 0 00 5D 0 1 1 1 1 0 1 0 00 5E 1 1 1 1 1 0 1 0 00 5F 0 0 0 0 0 1 1 0 00 60 1 0 0 0 0 1 1 0 00 61 0 1 0 0 0 1 1 0 00 62 1 1 0 0 0 1 1 0 00 63 0 0 1 0 0 1 1 0 00 64 1 0 1 0 0 1 1 0 00 65 0 1 1 0 0 1 1 0 00 66 1 1 1 0 0 1 1 0 00 67 0 0 0 1 0 1 1 0 00 68 1 0 0 1 0 1 1 0 00 69 0 1 0 1 0 1 1 0 00 6A 1 1 0

1 0 1 1 0 00 6B 0 0 1 1 0 1 1 0 00 6C 1 0 1 1 0 1 1 0 00 6D 0 1 1 1 0 1 1 0 00 6E 1 1 1 1 0 1 1 0 00 6F 0 0 0 0 1 1 1 0 00 70 1 0 0 0 1 1 1 0 00 71 0 1 0 0 1 1 1 0 00 72 1 1 0 0 1 1 1 0 00 73 0 0 1 0 1 1 1 0 00 74 1 0 1 0 1 1 1 0 00 75 0 1 1 0 1 1 1 0 00 76 1 1 1 0 1 1 1 0 00 77 0 0 0 1 1 1 1 0 00 78 1 0 0 1 1 1 1 0 00 79 0 1 0 1 1 1 1 0 00 7A 1 1 0 1 1 1 1 0 00 7B 0 0 1 1 1 1 1 0 00 7C 1 0 1 1 1 1 1 0 00 7D 0 1 1 1 1 1 1 0 00 7E 1 1 1 1 1 1 1 0 00 7F

OCH571

Page 35

Indoor unit switch setting display (Request code: 162 to 166)

0: OFF 1: ON

SW1, SW2, SW3, SW4, SW5

Display

1 2 3 4 5 6 7 8 0 0 0 0 0 0 0 1 00 80 1 0 0 0 0 0 0 1 00 81 0 1 0 0 0 0 0 1 00 82 1 1 0 0 0 0 0 1 00 83 0 0 1 0 0 0 0 1 00 84 1 0 1 0 0 0 0 1 00 85 0 1 1 0 0 0 0 1 00 86 1 1 1 0 0 0 0 1 00 87 0 0 0 1 0 0 0 1 00 88 1 0 0 1 0 0 0 1 00 89 0 1 0 1 0 0 0 1 00 8A 1 1 0 1 0 0 0 1 00 8B 0 0 1 1 0 0 0 1 00 8C 1 0 1 1 0 0 0 1 00 8D 0 1 1 1 0 0 0 1 00 8E 1 1 1 1 0 0 0 1 00 8F 0 0 0 0 1 0 0 1 00 90 1 0 0 0 1 0 0 1 00 91

0 1 0 0 1 0 0 1 00 92 1 1 0 0 1 0 0 1 00 93 0 0 1 0 1 0 0 1 00 94 1 0 1 0 1 0 0 1 00 95 0 1 1 0 1 0 0 1 00 96 1 1 1 0 1 0 0 1 00 97 0 0 0 1 1 0 0 1 00 98 1 0 0 1 1 0 0 1 00 99 0 1 0 1 1 0 0 1 00 9A 1 1 0 1 1 0 0 1 00 9B 0 0 1 1 1 0 0 1 00 9C 1 0 1 1 1 0 0 1 00 9D 0 1 1 1 1 0 0 1 00 9E 1 1 1 1 1 0 0 1 00 9F 0 0 0 0 0 1 0 1 00 A0 1 0 0 0 0 1 0 1 00 A1 0 1 0 0 0 1 0 1 00 A2 1 1 0 0 0 1 0 1 00 A3 0 0 1 0 0 1 0 1 00 A4 1 0 1 0 0 1 0 1 00 A5 0 1 1 0 0 1 0 1 00 A6 1 1 1 0 0 1 0 1 00 A7 0 0 0 1 0 1 0 1 00 A8 1 0 0 1 0 1 0 1 00 A9 0 1 0 1 0 1 0 1 00 AA 1 1 0

1 0 1 0 1 00 AB 0 0 1 1 0 1 0 1 00 AC 1 0 1 1 0 1 0 1 00 AD 0 1 1 1 0 1 0 1 00 AE 1 1 1 1 0 1 0 1 00 AF 0 0 0 0 1 1 0 1 00 B0 1 0 0 0 1 1 0 1 00 B1 0 1 0 0 1 1 0 1 00 B2 1 1 0 0 1 1 0 1 00 B3 0 0 1 0 1 1 0 1 00 B4 1 0 1 0 1 1 0 1 00 B5 0 1 1 0 1 1 0 1 00 B6 1 1 1 0 1 1 0 1 00 B7 0 0 0 1 1 1 0 1 00 B8 1 0 0 1 1 1 0 1 00 B9 0 1 0 1 1 1 0 1 00 BA 1 1 0 1 1 1 0 1 00 BB 0 0 1 1 1 1 0 1 00 BC 1 0 1 1 1 1 0 1 00 BD 0 1 1 1 1 1 0 1 00 BE 1 1 1 1 1 1 0 1 00 BF

0: OFF

1: ON

SW1, SW2, SW3, SW4, SW5

Display

1 2 3 4 5 6 7 8 0 0 0 0 0 0 1 1 00 C0 1 0 0 0 0 0 1 1 00 C1 0 1 0 0 0 0 1 1 00 C2 1 1 0 0 0 0 1 1 00 C3 0 0 1 0 0 0 1 1 00 C4 1 0 1 0 0 0 1 1 00 C5

0 1 1 0 0 0 1 1 00 C6 1 1 1 0 0 0 1 1 00 C7 0 0 0 1 0 0 1 1 00 C8 1 0 0 1 0 0 1 1 00 C9 0 1 0 1 0 0 1 1 00 CA 1 1 0 1 0 0 1 1 00 CB 0 0 1 1 0 0 1 1 00 CC 1 0 1 1 0 0 1 1 00 CD 0 1 1 1 0 0 1 1 00 CE 1 1 1 1 0 0 1 1 00 CF 0 0 0 0 1 0 1 1 00 D0 1 0 0 0 1 0 1 1 00 D1 0 1 0 0 1 0 1 1 00 D2 1 1 0 0 1 0 1 1 00 D3 0 0 1 0 1 0 1 1 00 D4 1 0 1 0 1 0 1 1 00 D5 0 1 1 0 1 0 1 1 00 D6 1 1 1 0 1 0 1 1 00 D7 0 0 0 1 1 0 1 1 00 D8 1 0 0 1 1 0 1 1 00 D9 0 1 0 1 1 0 1 1 00 DA 1 1 0 1 1 0 1 1 00 DB 0 0 1 1 1 0 1 1 00 DC 1 0 1 1 1 0 1 1 00 DD 0 1 1 1 1 0 1 1 00 DE 1 1 1 1 1 0 1 1 00 DF 0 0 0 0 0 1 1 1 00 E0 1 0 0 0 0 1 1 1 00 E1 0 1 0 0 0 1 1 1 00 E2 1 1 0 0 0 1 1 1 00 E3 0 0 1 0 0 1 1 1 00 E4 1 0 1 0 0 1 1 1 00 E5 0 1 1 0 0 1 1 1 00 E6 1 1 1 0 0 1 1 1 00 E7 0 0 0 1 0 1 1 1 00 E8 1 0 0 1 0 1 1 1 00 E9 0 1 0 1 0 1 1 1 00 EA 1 1 0

1 0 1 1 1 00 EB 0 0 1 1 0 1 1 1 00 EC 1 0 1 1 0 1 1 1 00 ED 0 1 1 1 0 1 1 1 00 EE 1 1 1 1 0 1 1 1 00 EF 0 0 0 0 1 1 1 1 00 F0 1 0 0 0 1 1 1 1 00 F1 0 1 0 0 1 1 1 1 00 F2 1 1 0 0 1 1 1 1 00 F3

0 0 1 0 1 1 1 1 00 F4 1 0 1 0 1 1 1 1 00 F5 0 1 1 0 1 1 1 1 00 F6 1 1 1 0 1 1 1 1 00 F7 0 0 0 1 1 1 1 1 00 F8 1 0 0 1 1 1 1 1 00 F9 0 1 0 1 1 1 1 1 00 F

A 1 1 0 1 1 1 1 1 00 FB 0 0 1 1 1 1 1 1 00 FC 1 0 1 1 1 1 1 1 00 FD 0 1 1 1 1 1 1 1 00 FE 1 1 1 1 1 1 1 1 00 FF

OCH571

Page 36

Output signal display (Request code: 175/553)

Please refer to Table 2 on relevant wiring diagram whilst using the following.

0: OFF 1: ON

OUT

Display

1 2 3 4 5A 5B 6 7 0 0 0 0 0 0 0 0 xx 00 1 0 0 0 0 0 0 0 xx 01 0 1 0 0 0 0 0 0 xx 02 1 1 0 0 0 0 0 0 xx 03 0 0 1 0 0 0 0 0 xx 04 1 0 1 0 0 0 0 0 xx 05 0 1 1 0 0 0 0 0 xx 06 1 1 1 0 0 0 0 0 xx 07 0 0 0 1 0 0 0 0 xx 08 1 0 0 1 0 0 0 0 xx 09 0 1 0 1 0 0 0 0 xx 0A 1 1 0 1 0 0 0 0 xx 0B 0 0 1 1 0 0 0 0 xx 0C 1 0 1 1 0 0 0 0 xx 0D 0 1 1 1 0 0 0 0 xx 0E 1 1 1 1 0 0 0 0 xx 0F 0 0 0 0 1 0 0 0 xx 10 1 0 0 0 1 0 0 0 xx 11 0 1 0 0 1 0 0 0 xx 12 1 1 0 0 1 0 0 0 xx 13 0 0 1 0 1 0 0 0 xx 14 1 0 1 0 1 0 0 0 xx 15 0 1 1 0 1 0 0 0 xx 16 1 1 1 0 1 0 0 0 xx 17 0 0 0 1 1 0 0 0 xx 18 1 0 0 1 1 0 0 0 xx 19 0 1 0 1 1 0 0 0 xx 1A 1 1 0 1 1 0 0 0 xx 1B 0 0 1 1 1 0 0 0 xx 1C 1 0 1 1 1 0 0 0 xx 1D 0 1 1 1 1 0 0 0 xx 1E 1 1 1 1 1 0 0 0 xx 1F

0 0 0 0 0 1 0 0 xx 20 1 0 0 0 0 1 0 0 xx 21 0 1 0 0 0 1 0 0 xx 22 1 1 0 0 0 1 0 0 xx 23 0 0 1 0 0 1 0 0 xx 24 1 0 1 0 0 1 0 0 xx 25 0 1 1 0 0 1 0 0 xx 26 1 1 1 0 0 1 0 0 xx 27 0 0 0 1 0 1 0 0 xx 28 1 0 0 1 0 1 0 0 xx 29 0 1 0 1 0 1 0 0 xx 2A 1 1 0

1 0 1 0 0 xx

2B 0 0 1 1 0 1 0 0 xx 2C 1 0 1 1 0 1 0 0 xx 2D 0 1 1 1 0 1 0 0 xx 2E 1 1 1 1 0 1 0 0 xx 2F 0 0 0 0 1 1 0 0 xx 30 1 0 0 0 1 1 0 0 xx 31 0 1 0 0 1 1 0 0 xx 32 1 1 0 0 1 1 0 0 xx 33 0 0 1 0 1 1 0 0 xx 34 1 0 1 0 1 1 0 0 xx 35 0 1 1 0 1 1 0 0 xx 36 1 1 1 0 1 1 0 0 xx 37 0 0 0 1 1 1 0 0 xx 38 1 0 0 1 1 1 0 0 xx 39 0 1 0 1 1 1 0 0 xx 3A 1 1 0 1 1 1 0 0 xx 3B 0 0 1 1 1 1 0 0 xx 3C 1 0 1 1 1 1 0 0 xx 3D 0 1 1 1 1 1 0 0 xx 3E 1 1 1 1 1 1 0 0 xx 3F

0: OFF 1: ON

OUT

Display

1 2 3 4 5A 5B 6 7 0 0 0 0 0 0 1 0 xx 40 1 0 0 0 0 0 1 0 xx 41 0 1 0 0 0 0 1 0 xx 42 1 1 0 0 0 0 1 0 xx 43 0 0 1 0 0 0 1 0 xx 44 1 0 1 0 0 0 1 0 xx 45 0 1 1 0 0 0 1 0 xx 46 1 1 1 0 0 0 1 0 xx 47 0 0 0 1 0 0 1 0 xx 48

1 0 0 1 0 0 1 0 xx 49 0 1 0 1 0 0 1 0 xx 4A 1 1 0 1 0 0 1 0 xx 4B 0 0 1 1 0 0 1 0 xx 4C 1 0 1 1 0 0 1 0 xx 4D 0 1 1 1 0 0 1 0 xx 4E 1 1 1 1 0 0 1 0 xx 4F 0 0 0 0 1 0 1 0 xx 50 1 0 0 0 1 0 1 0 xx 51 0 1 0 0 1 0 1 0 xx 52 1 1 0 0 1 0 1 0 xx 53 0 0 1 0 1 0 1 0 xx 54 1 0 1 0 1 0 1 0 xx 55 0 1 1 0 1 0 1 0 xx 56 1 1 1 0 1 0 1 0 xx 57 0 0 0 1 1 0 1 0 xx 58 1 0 0 1 1 0 1 0 xx 59 0 1 0 1 1 0 1 0 xx 5A 1 1 0 1 1 0 1 0 xx 5B 0 0 1 1 1 0 1 0 xx 5C 1 0 1 1 1 0 1 0 xx 5D 0 1 1 1 1 0 1 0 xx 5E 1 1 1 1 1 0 1 0 xx 5F 0 0 0 0 0 1 1 0 xx 60 1 0 0 0 0 1 1 0 xx 61 0 1 0 0 0 1 1 0 xx 62 1 1 0 0 0 1 1 0 xx 63 0 0 1 0 0 1 1 0 xx 64 1 0 1 0 0 1 1 0 xx 65 0 1 1 0 0 1 1 0 xx 66 1 1 1 0 0 1 1 0 xx 67 0 0 0 1 0 1 1 0 xx 68 1 0 0 1 0 1 1 0 xx 69 0 1 0 1 0 1 1 0 xx 6A 1 1 0

1 0 1 1 0 xx

6B 0 0 1 1 0 1 1 0 xx 6C 1 0 1 1 0 1 1 0 xx 6D 0 1 1 1 0 1 1 0 xx 6E 1 1 1 1 0 1 1 0 xx 6F 0 0 0 0 1 1 1 0 xx 70 1 0 0 0 1 1 1 0 xx 71 0 1 0 0 1 1 1 0 xx 72 1 1 0 0 1 1 1 0 xx 73

0 0 1 0 1 1 1 0 xx 74 1 0 1 0 1 1 1 0 xx 75 0 1 1 0 1 1 1 0 xx 76 1 1 1 0 1 1 1 0 xx 77 0 0 0 1 1 1 1 0 xx 78 1 0 0 1 1 1 1 0 xx 79 0 1 0 1 1 1 1 0 xx 7A 1 1 0 1 1 1 1 0 xx 7B 0 0 1 1 1 1 1 0 xx 7C 1 0 1 1 1 1 1 0 xx 7D 0 1 1 1 1 1 1 0 xx 7E 1 1 1 1 1 1 1 0 xx 7F

OCH571

Page 37

Output signal display (Request code: 175/553)

Please refer to Table 2 on relevant wiring diagram whilst using the following.

0: OFF 1: ON

OUT

Display

1 2 3 4 5A 5B 6 7 0 0 0 0 0 0 0 1 xx 80 1 0 0 0 0 0 0 1 xx 81 0 1 0 0 0 0 0 1 xx 82 1 1 0 0 0 0 0 1 xx 83 0 0 1 0 0 0 0 1 xx 84 1 0 1 0 0 0 0 1 xx 85 0 1 1 0 0 0 0 1 xx 86 1 1 1 0 0 0 0 1 xx 87 0 0 0 1 0 0 0 1 xx 88 1 0 0 1 0 0 0 1 xx 89 0 1 0 1 0 0 0 1 xx 8A 1 1 0 1 0 0 0 1 xx 8B 0 0 1 1 0 0 0 1 xx 8C 1 0 1 1 0 0 0 1 xx 8D 0 1 1 1 0 0 0 1 xx 8E 1 1 1 1 0 0 0 1 xx 8F 0 0 0 0 1 0 0 1 xx 90 1 0 0 0 1 0 0 1 xx 91 0 1 0 0 1 0 0 1 xx 92 1 1 0 0 1 0 0 1 xx 93 0 0 1 0 1 0 0 1 xx 94 1 0 1 0 1 0 0 1 xx 95 0 1 1 0 1 0 0 1 xx 96 1 1 1 0 1 0 0 1 xx 97 0 0 0 1 1 0 0 1 xx 98 1 0 0 1 1 0 0 1 xx 99 0 1 0 1 1 0 0 1 xx 9A 1 1 0 1 1 0 0 1 xx 9B 0 0 1 1 1 0 0 1 xx 9C 1 0 1 1 1 0 0 1 xx 9D 0 1 1 1 1 0 0 1 xx 9E 1 1 1 1 1 0 0 1 xx 9F 0 0 0 0 0 1 0 1 xx A0 1 0 0 0 0 1 0 1 xx A1 0 1 0 0 0 1 0 1 xx A2 1 1 0 0 0 1 0 1 xx A3 0 0 1 0 0 1 0 1 xx A4 1 0 1 0 0 1 0 1 xx A5 0 1 1 0 0 1 0 1 xx A6 1 1 1 0 0 1 0 1 xx A7 0 0 0 1 0 1 0 1 xx A8 1 0 0 1 0 1 0 1 xx A9 0 1 0 1 0 1 0 1 xx AA 1 1 0

1 0 1 0 1 xx A

B 0 0 1 1 0 1 0 1 xx AC 1 0 1 1 0 1 0 1 xx AD 0 1 1 1 0 1 0 1 xx AE 1 1 1 1 0 1 0 1 xx AF 0 0 0 0 1 1 0 1 xx B0 1 0 0 0 1 1 0 1 xx B1 0 1 0 0 1 1 0 1 xx B2 1 1 0 0 1 1 0 1 xx B3 0 0 1 0 1 1 0 1 xx B4 1 0 1 0 1 1 0 1 xx B5 0 1 1 0 1 1 0 1 xx B6 1 1 1 0 1 1 0 1 xx B7 0 0 0 1 1 1 0 1 xx B8 1 0 0 1 1 1 0 1 xx B9 0 1 0 1 1 1 0 1 xx BA 1 1 0 1 1 1 0 1 xx BB 0 0 1 1 1 1 0 1 xx BC 1 0 1 1 1 1 0 1 xx BD 0 1 1 1 1 1 0 1 xx BE 1 1 1 1 1 1 0 1 xx BF

0: OFF 1: ON

OUT

Display

1 2 3 4 5A 5B 6 7 0 0 0 0 0 0 1 1 xx C0 1 0 0 0 0 0 1 1 xx C1 0 1 0 0 0 0 1 1 xx C2 1 1 0 0 0 0 1 1 xx C3 0 0 1 0 0 0 1 1 xx C4 1 0 1 0 0 0 1 1 xx C5 0 1 1 0 0 0 1 1 xx C6 1 1 1 0 0 0 1 1 xx C7 0 0 0 1 0 0 1 1 xx C8 1 0 0 1 0 0 1 1 xx C9 0 1 0 1 0 0 1 1 xx CA 1 1 0 1 0 0 1 1 xx CB 0 0 1 1 0 0 1 1 xx CC 1 0 1 1 0 0 1 1 xx CD 0 1 1 1 0 0 1 1 xx CE 1 1 1 1 0 0 1 1 xx CF 0 0 0 0 1 0 1 1 xx D0

1 0 0 0 1 0 1 1 xx D1 0 1 0 0 1 0 1 1 xx D2 1 1 0 0 1 0 1 1 xx D3 0 0 1 0 1 0 1 1 xx D4 1 0 1 0 1 0 1 1 xx D5 0 1 1 0 1 0 1 1 xx D6 1 1 1 0 1 0 1 1 xx D7 0 0 0 1 1 0 1 1 xx D8 1 0 0 1 1 0 1 1 xx D9 0 1 0 1 1 0 1 1 xx DA 1 1 0 1 1 0 1 1 xx DB 0 0 1 1 1 0 1 1 xx DC 1 0 1 1 1 0 1 1 xx DD 0 1 1 1 1 0 1 1 xx DE 1 1 1 1 1 0 1 1 xx DF 0 0 0 0 0 1 1 1 xx E0 1 0 0 0 0 1 1 1 xx E1 0 1 0 0 0 1 1 1 xx E2 1 1 0 0 0 1 1 1 xx E3 0 0 1 0 0 1 1 1 xx E4 1 0 1 0 0 1 1 1 xx E5 0 1 1 0 0 1 1 1 xx E6 1 1 1 0 0 1 1 1 xx E7 0 0 0 1 0 1 1 1 xx E8 1 0 0 1 0 1 1 1 xx E9 0 1 0 1 0 1 1 1 xx EA 1 1 0

1 0 1 1 1 xx E

B 0 0 1 1 0 1 1 1 xx EC 1 0 1 1 0 1 1 1 xx ED 0 1 1 1 0 1 1 1 xx EE 1 1 1 1 0 1 1 1 xx EF 0 0 0 0 1 1 1 1 xx F0 1 0 0 0 1 1 1 1 xx F1 0 1 0 0 1 1 1 1 xx F2 1 1 0 0 1 1 1 1 xx F3 0 0 1 0 1 1 1 1 xx F4 1 0 1 0 1 1 1 1 xx F5 0 1 1 0 1 1 1 1 xx F6 1 1 1 0 1 1 1 1 xx F7 0 0 0 1 1 1 1 1 xx F8 1 0 0 1 1 1 1 1 xx F9 0 1 0 1 1 1 1 1 xx FA 1 1 0 1 1 1 1 1 xx FB

0 0 1 1 1 1 1 1 xx FC 1 0 1 1 1 1 1 1 xx FD 0 1 1 1 1 1 1 1 xx FE 1 1 1 1 1 1 1 1 xx FF

OCH571

Page 38

Output signal display (Request code: 175/553)

Please refer to Table 2 on relevant wiring diagram whilst using the following.

Mixing valve state

OUT

Mixing valve state

5A 5B

0 0 Stop 0 1 Stop 1 0 Open 1 1 Close

0: OFF 1: ON

OUT

Display

8 * 9 10 11 12 13 14 15

0 0 0 0 0 0 0 0 00 xx 1 0 0 0 0 0 0 0 01 xx 0 1 0 0 0 0 0 0 02 xx 1 1 0 0 0 0 0 0 03 xx 0 0 1 0 0 0 0 0 04 xx 1 0 1 0 0 0 0 0 05 xx 0 1 1 0 0 0 0 0 06 xx 1 1 1 0 0 0 0 0 07 xx 0 0 0 1 0 0 0 0 08 xx 1 0 0 1 0 0 0 0 09 xx 0 1 0 1 0 0 0 0 0A xx 1 1 0 1 0 0 0 0 0B xx 0 0 1 1 0 0 0 0 0C xx 1 0 1 1 0 0 0 0 0D xx 0 1 1 1 0 0 0 0 0E xx 1 1 1 1 0 0 0 0 0F xx 0 0 0 0 1 0 0 0 10 xx 1 0 0 0 1 0 0 0 11 x x 0 1 0 0 1 0 0 0 12 xx 1 1 0 0 1 0 0 0 13 xx 0 0 1 0 1 0 0 0 14 xx 1 0 1 0 1 0 0 0 15 xx 0 1 1 0 1 0 0 0 16 xx 1 1 1 0 1 0 0 0 17 xx 0 0 0 1 1 0 0 0 18 xx 1 0 0 1 1 0 0 0 19 xx 0 1 0 1 1 0 0 0 1A x x 1 1 0 1 1 0 0 0 1B xx 0 0 1 1 1 0 0 0 1C xx 1 0 1 1 1 0 0 0 1D xx 0 1 1 1 1 0 0 0 1E xx 1 1 1 1 1 0 0 0 1F xx 0 0 0 0 0 1 0 0 20 xx

1 0 0 0 0 1 0 0 21 xx 0 1 0 0 0 1 0 0 22 xx 1 1 0 0 0 1 0 0 23 xx 0 0 1 0 0 1 0 0 24 xx 1 0 1 0 0 1 0 0 25 xx 0 1 1 0 0 1 0 0 26 xx 1 1 1 0 0 1 0 0 27 xx 0 0 0 1 0 1 0 0 28 xx 1 0 0 1 0 1 0 0 29 xx 0 1 0 1 0 1 0 0 2A xx 1 1 0

1 0 1 0 0 2

B xx 0 0 1 1 0 1 0 0 2C xx 1 0 1 1 0 1 0 0 2D xx 0 1 1 1 0 1 0 0 2E xx 1 1 1 1 0 1 0 0 2F xx 0 0 0 0 1 1 0 0 30 xx 1 0 0 0 1 1 0 0 31 xx 0 1 0 0 1 1 0 0 32 xx 1 1 0 0 1 1 0 0 33 xx 0 0 1 0 1 1 0 0 34 xx 1 0 1 0 1 1 0 0 35 xx 0 1 1 0 1 1 0 0 36 xx 1 1 1 0 1 1 0 0 37 xx 0 0 0 1 1 1 0 0 38 xx 1 0 0 1 1 1 0 0 39 xx 0 1 0 1 1 1 0 0 3A xx 1 1 0 1 1 1 0 0 3B xx 0 0 1 1 1 1 0 0 3C xx 1 0 1 1 1 1 0 0 3D xx 0 1 1 1 1 1 0 0 3E xx 1 1 1 1 1 1 0 0 3F xx

* Displayed only when the request code is 533.

OUT

Display

8 9 10 11 12 13 14 15 0 0 0 0 0 0 1 0 40 xx 1 0 0 0 0 0 1 0 41 xx 0 1 0 0 0 0 1 0 42 xx 1 1 0 0 0 0 1 0 43 xx 0 0 1 0 0 0 1 0 44 xx 1 0 1 0 0 0 1 0 45 xx 0 1 1 0 0 0 1 0 46 xx 1 1 1 0 0 0 1 0 47 xx 0 0 0 1 0 0 1 0 48 xx 1 0 0 1 0 0 1 0 49 xx 0 1 0 1 0 0 1 0 4A xx 1 1 0 1 0 0 1 0 4B xx 0 0 1 1 0 0 1 0 4C xx 1 0 1 1 0 0 1 0 4D xx 0 1 1 1 0 0 1 0 4E xx 1 1 1 1 0 0 1 0 4F xx 0 0 0 0 1 0 1 0 50 xx 1 0 0 0 1 0 1 0 51 xx 0 1 0 0 1 0 1 0 52 xx 1 1 0 0 1 0 1 0 53 xx 0 0 1 0 1 0 1 0 54 xx 1 0 1 0 1 0 1 0 55 xx 0 1 1 0 1 0 1 0 56 xx 1 1 1 0 1 0 1 0 57 xx 0 0 0 1 1 0 1 0 58 xx 1 0 0 1 1 0 1 0 59 xx 0 1 0 1 1 0 1 0 5A xx 1 1 0 1 1 0 1 0 5B xx 0 0 1 1 1 0 1 0 5C xx 1 0 1 1 1 0 1 0 5D xx 0 1 1 1 1 0 1 0 5E xx 1 1 1 1 1 0 1 0 5F xx 0 0 0 0 0 1 1 0 60 xx 1 0 0 0 0 1 1 0 61 xx 0 1 0 0 0 1 1 0 62 xx 1 1 0 0 0 1 1 0 63 xx 0 0 1 0 0 1 1 0 64 xx 1 0 1 0 0 1 1 0 65 xx 0 1 1 0 0 1 1 0 66 xx 1 1 1 0 0 1 1 0 67 xx 0 0 0 1 0 1 1 0 68 xx 1 0 0 1 0 1 1 0 69 xx 0 1 0 1 0 1 1 0 6A xx 1 1 0

1 0 1 1 0 6

B xx 0 0 1 1 0 1 1 0 6C xx 1 0 1 1 0 1 1 0 6D xx 0 1 1 1 0 1 1 0 6E xx 1 1 1 1 0 1 1 0 6F xx 0 0 0 0 1 1 1 0 70 xx 1 0 0 0 1 1 1 0 71 xx 0 1 0 0 1 1 1 0 72 xx 1 1 0 0 1 1 1 0 73 xx 0 0 1 0 1 1 1 0 74 xx 1 0 1 0 1 1 1 0 75 xx 0 1 1 0 1 1 1 0 76 xx 1 1 1 0 1 1 1 0 77 xx 0 0 0 1 1 1 1 0 78 xx 1 0 0 1 1 1 1 0 79 xx 0 1 0 1 1 1 1 0 7A xx 1 1 0 1 1 1 1 0 7B xx 0 0 1 1 1 1 1 0 7C xx 1 0 1 1 1 1 1 0 7D xx 0 1 1 1 1 1 1 0 7E xx 1 1 1 1 1 1 1 0 7F xx

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Page 39

0: OFF (open) 1: ON (short)

Display

1 2 3 4 5 6 7 8 0 0 0 0 0 0 0 0 00 00 1 0 0 0 0 0 0 0 00 01 0 1 0 0 0 0 0 0 00 02 1 1 0 0 0 0 0 0 00 03 0 0 1 0 0 0 0 0 00 04 1 0 1 0 0 0 0 0 00 05 0 1 1 0 0 0 0 0 00 06 1 1 1 0 0 0 0 0 00 07 0 0 0 1 0 0 0 0 00 08 1 0 0 1 0 0 0 0 00 09 0 1 0 1 0 0 0 0 00 0A 1 1 0 1 0 0 0 0 00 0B 0 0 1 1 0 0 0 0 00 0C 1 0 1 1 0 0 0 0 00 0D 0 1 1 1 0 0 0 0 00 0E 1 1 1 1 0 0 0 0 00 0F 0 0 0 0 1 0 0 0 00 10 1 0 0 0 1 0 0 0 0 0 11 0 1 0 0 1 0 0 0 00 12 1 1 0 0 1 0 0 0 00 13 0 0 1 0 1 0 0 0 00 14 1 0 1 0 1 0 0 0 00 15 0 1 1 0 1 0 0 0 00 16 1 1 1 0 1 0 0 0 00 17 0 0 0 1 1 0 0 0 00 18 1 0 0 1 1 0 0 0 00 19 0 1 0 1 1 0 0 0 00 1A 1 1 0 1 1 0 0 0 00 1B 0 0 1 1 1 0 0 0 00 1C 1 0 1 1 1 0 0 0 00 1D 0 1 1 1 1 0 0 0 00 1E 1 1 1 1 1 0 0 0 00 1F 0 0 0 0 0 1 0 0 00 20 1 0 0 0 0 1 0 0 00 21

0 1 0 0 0 1 0 0 00 22 1 1 0 0 0 1 0 0 00 23 0 0 1 0 0 1 0 0 00 24 1 0 1 0 0 1 0 0 00 25 0 1 1 0 0 1 0 0 00 26 1 1 1 0 0 1 0 0 00 27 0 0 0 1 0 1 0 0 00 28 1 0 0 1 0 1 0 0 00 29 0 1 0 1 0 1 0 0 00 2A 1 1 0

1 0 1 0 0 00

2B 0 0 1 1 0 1 0 0 00 2C 1 0 1 1 0 1 0 0 00 2D 0 1 1 1 0 1 0 0 00 2E 1 1 1 1 0 1 0 0 00 2F 0 0 0 0 1 1 0 0 00 30 1 0 0 0 1 1 0 0 00 31 0 1 0 0 1 1 0 0 00 32 1 1 0 0 1 1 0 0 00 33 0 0 1 0 1 1 0 0 00 34 1 0 1 0 1 1 0 0 00 35 0 1 1 0 1 1 0 0 00 36 1 1 1 0 1 1 0 0 00 37 0 0 0 1 1 1 0 0 00 38 1 0 0 1 1 1 0 0 00 39 0 1 0 1 1 1 0 0 00 3A 1 1 0 1 1 1 0 0 00 3B 0 0 1 1 1 1 0 0 00 3C 1 0 1 1 1 1 0 0 00 3D 0 1 1 1 1 1 0 0 00 3E 1 1 1 1 1 1 0 0 00 3F

Input signal display (Request code: 176/554)

Please refer to Table 1 on relevant wiring diagram whilst using the following.

0: OFF (open) 1: ON (short)

Display

1 2 3 4 5 6 7 8 0 0 0 0 0 0 1 0 00 40 1 0 0 0 0 0 1 0 00 41 0 1 0 0 0 0 1 0 00 42 1 1 0 0 0 0 1 0 00 43 0 0 1 0 0 0 1 0 00 44 1 0 1 0 0 0 1 0 00 45 0 1 1 0 0 0 1 0 00 46 1 1 1 0 0 0 1 0 00 47 0 0 0 1 0 0 1 0 00 48 1 0 0 1 0 0 1 0 00 49 0 1 0 1 0 0 1 0 00 4A 1 1 0 1 0 0 1 0 00 4B 0 0 1 1 0 0 1 0 00 4C 1 0 1 1 0 0 1 0 00 4D 0 1 1 1 0 0 1 0 00 4E 1 1 1 1 0 0 1 0 00 4F 0 0 0 0 1 0 1 0 00 50 1 0 0 0 1 0 1 0 00 51 0 1 0 0 1 0 1 0 00 52 1 1 0 0 1 0 1 0 00 53 0 0 1 0 1 0 1 0 00 54 1 0 1 0 1 0 1 0 00 55 0 1 1 0 1 0 1 0 00 56 1 1 1 0 1 0 1 0 00 57 0 0 0 1 1 0 1 0 00 58 1 0 0 1 1 0 1 0 00 59 0 1 0 1 1 0 1 0 00 5A 1 1 0 1 1 0 1 0 00 5B 0 0 1 1 1 0 1 0 00 5C 1 0 1 1 1 0 1 0 00 5D 0 1 1 1 1 0 1 0 00 5E 1 1 1 1 1 0 1 0 00 5F 0 0 0 0 0 1 1 0 00 60 1 0 0 0 0 1 1 0 00 61 0 1 0 0 0 1 1 0 00 62 1 1 0 0 0 1 1 0 00 63 0 0 1 0 0 1 1 0 00 64 1 0 1 0 0 1 1 0 00 65 0 1 1 0 0 1 1 0 00 66 1 1 1 0 0 1 1 0 00 67 0 0 0 1 0 1 1 0 00 68 1 0 0 1 0 1 1 0 00 69 0 1 0 1 0 1 1 0 00 6A 1 1 0

1 0 1 1 0 00

6B 0 0 1 1 0 1 1 0 00 6C 1 0 1 1 0 1 1 0 00 6D 0 1 1 1 0 1 1 0 00 6E 1 1 1 1 0 1 1 0 00 6F 0 0 0 0 1 1 1 0 00 70 1 0 0 0 1 1 1 0 00 71 0 1 0 0 1 1 1 0 00 72 1 1 0 0 1 1 1 0 00 73 0 0 1 0 1 1 1 0 00 74 1 0 1 0 1 1 1 0 00 75 0 1 1 0 1 1 1 0 00 76 1 1 1 0 1 1 1 0 00 77 0 0 0 1 1 1 1 0 00 78 1 0 0 1 1 1 1 0 00 79 0 1 0 1 1 1 1 0 00 7A 1 1 0 1 1 1 1 0 00 7B 0 0 1 1 1 1 1 0 00 7C 1 0 1 1 1 1 1 0 00 7D 0 1 1 1 1 1 1 0 00 7E 1 1 1 1 1 1 1 0 00 7F

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Page 40

Indoor unit only operation

Indoor unit

Necessary

Heat pump

Not necessary

Main controller Necessary DIP switch setting Electric heater

SW4-4 ON, SW4-5 ON

Boiler SW4-4 ON, SW4-6 ON

Setting range for ow temp. 25 - 60 °C Selectable

Setting range for tank temp. 40 - 60 °C Selectable

Indoor unit only operation

In indoor unit only operation, an operation without connecting outdoor unit is possible.

When in Indoor unit only operation the main control has control functions.

Heating for DHW and space heating is provided by the heater.

• Activating indoor unit only operation mode To activate indoor unit only operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-4 and SW4-5 to ON.

3. Switch ON the breaker(s).

4. Indoor unit only operation is now activated.

• Deactivating indoor unit only operation mode To deactivate indoor unit only operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-4 and SW4-5 to OFF.

3. Switch ON the breaker(s).

4. Indoor unit only operation is now deactivated.

Heating for space heating is provided by the boiler.

• Activating indoor unit only operation mode To activate indoor unit only operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-4 and SW4-6 to ON.

3. Switch ON the breaker(s).

4. Indoor unit only operation is now activated.

• Deactivating indoor unit only operation mode To deactivate indoor unit only operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-4 and SW4-6 to OFF.

3. Switch ON the breaker(s).

4. Indoor unit only operation is now deactivated.

Emergency operation

In emergency operation, an operation without connecting outdoor unit and main controller is possible. When in Emergency operation the main control has NO control functions. Space heating ow temp. is restarted 40 °C and DHW tank temp. is restricted 50 °C. *1

Heating for DHW and space heating is provided by the heater.

• Activating emergency operation mode To activate emergency operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-5 to ON.

3. Switch ON the breaker(s).

4. Emergency operation is now activated.

• Deactivating emergency operation mode To deactivate emergency operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-5 to OFF.

3. Switch ON the breaker(s).

4. Emergency operation is now deactivated.

Heating for space heating is provided by the boiler.

• Activating emergency operation mode To activate emergency operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-6 to ON.

3. Switch ON the breaker(s).

4. Emergency operation is now activated.

• Deactivating emergency operation mode To deactivate emergency operation see the following:

1. Switch OFF the breaker for the outdoor unit (or both breakers if cylinder powered independently).

2. Change DIP switch SW4-6 to OFF.

3. Switch ON the breaker(s).

4. Emergency operation is now deactivated.

WARNING Do not attempt to change the DIP switches whilst the breaker(s) are ON as this could result in ELECTROCUTION.

Emergency operation

Indoor unit

Necessary

Heat pump

Not necessary

Main controller Not necessary

DIP switch setting

Electric heater SW4-5 ON

Boiler SW4-6 ON

Setting range for ow temp.

Fixed at 45 °C

Setting range for tank temp.

Fixed at 50 °C *1

*1 Default setting is 50 °C. Once system has started running,

emergency operation runs at the latest set temp.

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Page 41

TROUBLESHOOTING

10-1. Troubleshooting

Present and past Error codes are logged and displayed on the main controller or control board of the outdoor unit. Please refer to the table below and subsequent explanations to diagnose and remedy typical problems that may occur in the eld.

Unit Condition Error Code Action

Reoccurring problem

Displayed Use table 10-4. "Self diagnosis and action" to identify fault and correct.

Not Displayed Use table 10-5. "Troubleshooting by inferior phenomena" to identify fault and correct.

Non reoccurring problem Logged 1. Check temporary causes of defects such as the operation of safety devices on the re-

frigerant/water circuit including compressor, poor wiring, electrical noise etc. Re-check the symptom and the installation environment, refrigerant amount (Split systems only), weather conditions at time of fault etc.

2. Reset Error code logs, Service the unit and restart system.

Not Logged

1. Recheck the abnormal symptom

2. Identify cause of problem and take corrective action according to Table 10-5. "Troubleshooting by inferior phenomena"

3. If no obvious problem can be found continue to operate the unit.

NOTE Electricalcomponentsshouldonly bereplacedasa naloption.Pleasefollow instructionsinTables10-4.and10-5.ErrorCodesandInferiorPhenomena fully before resorting to replacing parts.

10-2. Test Run

Before a test run

• After installation of outdoor unit, pipework and electrical wiring, recheck that there is no water leakage, loosened connections or miswiring.

• Measure impedance between the ground and the power supply terminal block (L,N) on the outdoor and indoor units with suitable (500V) ohmmeter. Resistance should be ≥ 1.0MΩ .

• Read the Installation and Operation Manuals fully especially the safety requirements before carrying out any test runs.

10-3. Malfunction diagnosis method by main controller

If during start up or operation a malfunction occurs, the error code screen may be displayed on the main controller. The error code screen shows the following; code, unit, ref. address, and telephone number of installer (only if previously entered by the installer) Please note in the case of some malfunctions an error code is not generated, please refer to table 10-5. for more details.

To reset

1. To reset the main controller press F4 button (Reset).

2. Then press F3 (Yes) to conrm.

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10-4. Self diagnosis and action

Check if DIP SW is set correctly. (Refer to Section 6-6.)

Error code Title and display conditions Possible Cause Diagnosis and action

L3 Circulation water temperature overheat

protection

Error code displayed when THW1 detects a temp. ≥ 80ºC for 10 consecutive seconds or THW2 detects a temp. ≥ 80ºC for 10 consecutive

seconds.

DHW : Domestic hot water mode Heating : Heating mode Cooling : Cooling mode LP : Legionella prevention mode

FS : Freeze stat OS : Operation stop TH1A/B : Room

temperature

thermistor

TH2 : Liquid refrigerant temperature thermistor THW1 : Flow water

temperature

thermistor

THW2 : Return water

temperature

thermistor

THW5 : Tank water

temperature

thermistor

THW6 :

Zone 1 ow water temperature thermistor

THW7 :

Zone 1 return water temperature thermistor

THW8 :

Zone 2 ow water temperature thermistor

THW9 :

Zone 2 return water temperature thermistor

THWB1 :

Boiler flow water temperature thermistor

THWB2 :

Boiler return water temperature thermistor

1. Insufcient system head 1. Refer to table in section 10-6. to determine if system pump meets requirements. If more head required either add an pump of

the same size or replace existing pump with

capacity model.

See 11. DISASSEMBLY PROCEDURE for how to replace pump.

2. Reduced ow in primary water circuit

Due to 1 or more of the following; Faulty pump, insufficient air purge, blockedstrainer, leak in water circuit.

2. Check circulation pump (See 10-6. for how to check).

Open purge valve to remove trapped air. Check the strainer for blockages. Check the primary water circuit for leaks. Check that the ow amount is within the recommended range.

3. Valve operation fault 3. Check valves on primary water circuit are installed level.

4. 2-way valve (local supply) actuator

fault

4. Electrically test to determine fault.

5. 3-way valve (local supply) actuator

fault

5. 1) Electrically test to determine fault.

2) Operate 3-way valve manually using the

main remote controller. (Refer to <Manual operation> in 9-4).

3) Replace 3-way valve.

6. Booster heater relay (BHC1, BHC2,

BHCP) operating fault

6. Electrically test the relays (BHC1, BHC2, BHCP) to determine fault.

See 10-6. for how to check.

7. Power supply voltage increase 7. Check the supply voltage.

8. THW1 or THW5 has become detached from its holder.

8. Visually inspect location and reattach as necessary.

9. THW1 or THW2 fault 9. Check resistance of thermistor against table in section 10-6. Compare FTC detected temperature to hand held detector.

10.

FTC board failure

10.

Replace board.

Tank water temperature overheat protection

<DHW/Heating/Cooling/LP/FS/OS> Error code display when THW5 detects a temp. ≥ 75ºC for 10 consecutive seconds.

1. 3-way valve (local supply) actuator

fault

1. 1) Electrically test to determine fault.

2) Operate 3-way valve manually using the

main remote controller. (Refer to <Manual operation> in 9-4).

3) Replace 3-way valve.

2. Immersion heater relay (IHC) operat-

ing fault

2. Check immersion heater relay (IHC)

3. THW5 fault 3. Check resistance of thermistor against table in section 10-6. Compare FTC detected temperature to hand held detector.

4. FTC board failure 4. Replace board.

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Page 43

Error code Title and display conditions Possible Cause Diagnosis and action

P1/P2/L5/LD

Indoor unit temperature thermistor failure

* The thermistors subject to failure can be

checked in “Request code: 567” in “Running

information

<DHW/Heating/Cooling/LP/FS/OS> Error code displayed when thermistor is at open

or short (see table).

Exceptions

Error code will not be displayed for TH2; During

defrost and for 10 minutes after defrost operation.

Error code

Thermistor

Open detection Short detection

Symbol Name P1 TH1A/TH1B Room temperature thermistor -39ºC or below 88.5ºC or above P2 TH2 Liquid temperature thermistor -39ºC or below 88.5ºC or above

THW1 Flow water temperature thermistor -39ºC or below 88.5ºC or above THW2 Return water temperature thermistor -39ºC or below 88.5ºC or above THW5 Tank water temperature thermistor -39ºC or below 88.5ºC or above THW6

Zone 1 ow water temperature thermistor

-39ºC or below 88.5ºC or above

THW7

Zone 1 return water temperature thermistor

-39ºC or below 88.5ºC or above

THW8

Zone 2 ow water temperature thermistor

-39ºC or below 88.5ºC or above

THW9

Zone 2 return water temperature thermistor

-39ºC or below 88.5ºC or above

THWB1

Boiler flow water temperature thermistor

-40ºC or below 140ºC or above

THWB2

Boiler return water temperature thermistor

-40ºC or below 140ºC or above

1. Connector/terminal wire has become detached or loose wiring.

1. Visually check the terminals and connections and reattachas appropriate.

2. Thermistor fault 2. Check resistance of thermistor against table in section 10-6. Compare FTC detected temperature to hand held detector.

3. FTC board failure 3. Replace board.

4. The thermistor on the wireless remote

controller or the main remote control-

ler may be defective. (when Room temp. is chosen for the Heating operation and when Main Controller or

Room RC 1-8 is chosen for the Room

Sensor setting in the Initial setting)

4. Replace wireless remote controller or main remote controller

5. Incorrect setting of the DIP switch(es) 5. Check the DIP switch setting(s).

Circulation water freeze protection <DHW/Heating/Cooling/LP/FS/OS>

Error code displayed when THW1 detects a temp. ≤ 1ºC for 10 consecutive seconds or THW2 detects a temp. ≤ 3ºC for 10 consecutive

seconds.

Exception

Error code will not be displayed if;

FS function is disabled,

For 10 minutes after water circulation pump1 is switched on.

1. Insufcient system head 1. Refer to table in section 10-6. to determine if system pump meets requirements. If more head required either add an pump

of the same size or replace existing pump with capacity model. See 11. DISASSEMBLY PROCEDURE for how to replace pump.

2. Reduced ow in primary water circuit.

Due to 1 or more of the following; Faulty pump, insufficient air purge, blockedstrainer, leak in water circuit.

2. Check circulation pump (See 10-6. for how to check).

Open purge valve to remove trapped air. Check the strainer for blockages. Check the primary water circuit for leaks. Check that the flow amount is within the recommended range.

3. Valve operation fault 3. Check valves on primary water circuit are installed level.

4. 2-way valve (local supply) actuator fault 4. Electrically test to determine fault.

5. 3-way valve (local supply) actuator fault 5. 1) Electrically test to determine fault.

2) Operate 3-way valve manually using the

main remote controller. (Refer to <Manual operation> in 9-4).

3) Replace 3-way valve.

6. THW1 has become detached from its

holder.

6. Visually inspect location and reattach as necessary.

7. THW1 or THW2 fault 7. Check resistance of thermistor against table in section 10-6. Compare FTC detected temperature to hand held detector.

8. FTC board failure 8. Replace board.

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Page 44

Error code Title and display conditions Possible Cause Diagnosis and action

L8 Heating operation error

* “3” is displayed in “Request code: 567” in “Run-

ning information”. <Heating/FS> If a), b) and c) occur, L8 is displayed;

No change on THW1 and THW5

(under 1 °C for 20 minutes from unit starts operation)

b) No change on THW1

(under 1 °C for 10 minutes from booster heater starts operation)

c) THW1 - THW2 < -5 °C

(for 10 minutes continuously)

1. THW1 has become detached from its holder.

1. Visually inspect location and reattach as necessary.

2. Booster heater fault 2. Electrically test to determine fault.

See 10-6. for how to check.

3. THW1 or THW2 or THW5 fault 3. Check resistance of thermistor against table in section 10-6. Compare FTC detected temperature to hand held detector.

4. FTC board failure 4. Replace board.

Heating operation error

* “A” is displayed in “Request code: 567” in

“Running information”.

1. THW6 has become detached from its

holder.

1. Visually inspect location and reattach as necessary.

2. THW6 or THW7 fault 2. Check resistance of thermistor against table in section 10-6. Compare FTC detected temperature to hand held detector.

3. FTC board failure 3. Replace board.

Heating operation error

* “C” is displayed in “Request code: 567” in

“Running information”.

1. THW8 has become detached from its

holder.

1. Visually inspect location and reattach as necessary.

2. THW8 or THW9 fault 2. Check resistance of thermistor against table in section 10-6. Compare FTC detected temperature to hand held detector.

3. FTC board failure 3. Replace board.

Lowprimarycircuit(Heatsourceside)ow ratedetectedbyowsensor

* “1” is displayed in “Request code: 569” in “Run-

ning information”. <DHW/Heating/Cooling/LP/FS> Error code displayed when ow sensor detects low ow rate for 10 seconds.

Exception

For 1 minute after water circulation pump1 is switched on.

1. Insufcient system head 1. Refer to table in section 10-6. to determine if system pump meets requirements. If more head required either add an pump

of the same size or replace existing pump with capacity model. See 11. DISASSEMBLY PROCEDURE for how to replace pump.

2. Reduced ow in primary water circuit

Due to 1 or more of the following; Faulty pump, insufcient air purge, blocked strainer, leak in water circuit.

2. Check circulation pump (See 10-6. for how to check).

Open purge valve to remove trapped air. Check the strainer for blockages. Check the primary water circuit for leaks. Check that the flow amount is within the recommended range.

3. Valve operation fault 3. Check valves on primary water circuit are installed level.

2-way valve (local supply) actuator fault

4. Electrically test to determine fault.

5. Connector wire has become detached

or loose wiring.

5. Visually check the CN1A connector and reattach if necessary.

6. Flow sensor fault 6. Electrically test to determine fault.

See 10-6. for how to check.

7. Incorrect setting of the SW2-2 7. Check the SW2-2 setting.

8. FTC board failure 8. Replace board.

Lowprimarycircuit(Zone1side)owrate detectedbyowswitch

* “2” is displayed in “Request code: 569” in “Run-

ning information”.

1. Insufcient system head 1. If more head required either add an pump of the same size or replace existing pump.

2. Reduced ow in primary water circuit

Due to 1 or more of the following; Faulty pump, insufcient air purge, blocked strainer, leak in water circuit.

2. Check circulation pump (See 10-6. for how to check).

Open purge valve to remove trapped air. Check the strainer for blockages. Check the primary water circuit for leaks. Check that the flow amount is within the recommended range.

3. Terminal wire has become detached or loose wiring.

3. Visually check the IN3 terminal and reattach if necessary.

4. Flow switch fault 4. Electrically test to determine fault.

5. Incorrect setting of the SW3-2 5. Check the SW3-2 setting.

6. FTC board failure 6. Replace board.

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Page 45

Error code Title and display conditions Possible Cause Diagnosis and action

L9 Lowprimarycircuit(Zone2side)owrate

detectedbyowswitch

* “3” is displayed in “Request code: 569” in “Run-

ning information”.

1. Insufcient system head 1. If more head required either add an pump of the same size or replace existing pump.

2. Reduced ow in primary water circuit

Due to 1 or more of the following; Faulty pump, insufcient air purge, blocked strainer, leak in water circuit.

2. Check circulation pump (See 10-6. for how to check).

Open purge valve to remove trapped air. Check the strainer for blockages. Check the primary water circuit for leaks. Check that the flow amount is within the recommended range.

3. Terminal wire has become detached or loose wiring.

3. Visually check the IN7 terminal and reattach if necessary.

4. Flow switch fault 4. Electrically test to determine fault.

5. Incorrect setting of the SW3-3 5. Check the SW3-3 setting.

6. FTC board failure 6. Replace board.

LC Boiler circulation water temperature overheat

protection

<DHW/Heating/LP/FS/OS> Error code displayed when THWB1 detects a temperature ≥80ºC for 10 consecutive seconds or THWB2 detects a temperature ≥80ºC for 10

consecutive seconds

1. The set temperature for Boiler is too

high.

Check if the set temperature for Boiler for

heating exceeds the restriction. (See the manual for the thermistors "PAC-TH011HT-E")

2. Flow rate of the heating circuit from the boiler may be reduced.

2. Check for

• water leakage

• strainer blockage

• water circulation pump function

LD Boiler temperature thermistor (THWB1, THWB2)

failure

Refer to error codes (P1/P2/L5/LD).

LE Boiler operation error

<Heating> Boiler is running and THW6 detects a temperature <30ºC for consecutive 60 minutes.

1. THW6 has become detached from its holder.

1. Visually inspect location and reattach as necessary.

2. Incorrect wiring between FTC (OUT10) and the boiler.

2. See the manual of the thermistors "PAC-

TH011HT-E".

3. Boiler fuel has run out or the system is OFF.

3. Check the status of the boiler.

4. Boiler failure 4. Check the status of the boiler.

5. FTC board failure 5. Replace board.

LH Boiler circulation water freeze protection Flow rate of the heating circuit from the

boiler may be reduced.

Check for

• water leakage

• strainer blockage

• water circulation pump function

LJ DHW operation error (type of external plate HEX)

1. DHW tank water temp. thermistor

(THW5) has become detached from its holder.

2. Flow rate of the sanitary circuit may be

reduced.

1. Check for disconnection of DHW tank water

temp. thermistor (THW5).

2. Check for water circulation pump function.

LL Setting errors of DIP switches on FTC control

board

Incorrect setting of DIP switches.

1. Boiler operation 1. For boiler operation, check that DIP SW1-1

is set to ON (With Boiler) and DIP SW2-6 is

set to ON (With Mixing Tank).

2. 2-zone temperature control 2. For 2-zone temperature control, check DIP

SW2-7 is set to ON (2-zone) and DIP SW2-

6 is set to ON (With Mixing Tank).

3. Multiple outdoor units control 3. For multiple outdoor units control, check DIP

SW1-3 is set to ON on FTC (slave) that runs DHW operation .

P1 Indoor unit temperature thermistor (TH1A/TH1B)

failure

Refer to error codes (P1/P2/L5/LD).

P2 Indoor unit temperature thermistor (TH2) failure Refer to error codes (P1/P2/L5/LD).

Anti-freeze protection of plate heat exchanger <Cooling> The error code displayed when Ref. liquid temp.

(TH2) stays at -5

ºC or lower for 10 seconds after

compressor operates for 6 minutes.

1. Reduced water ow

1., 2.

Check water piping.

• Clogged lter

• Leakage of water

2. Low temperature

• Low load

• Inlet water is too cold.

3. Defective water pump 3. Check water pump.

4. Defective outdoor fan control. 4. Check outdoor fan motor.

5. Overcharge of refrigerant

5., 6.

Check operating condition of refrigerant circuit.

6. Defective refrigerant circuit (clogs)

7. Malfunction of linear expansion valve 7. Check linear expansion valve.

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Error code Title and display conditions Possible Cause Diagnosis and action

P6 <Defrosting>

THW2 detects a temperature ≤15ºC and TH2 detects a temperature ≤−16ºC for consecutive 10

seconds.

1. Reduced water ow

1., 2.

Check water piping.

• Clogged lter

• Leakage of water

2. Low temperature

• Low load

• Inlet water is cold

3. Defective water pump 3. Check water pump.

4. Leakage or shortage of refrigerant 4. Correct to proper amount of refrigerant.

5. Malfunction of linear expansion valve 5. Check linear expansion valve.

E0/E4 Main controller communication failure

(Reception error)

Error code E0 is displayed if main controller does

not receive any signal from the indoor unit for ref. address "0" for 3 minutes.

Error code E4 is displayed if indoor unit does not receive any data from the main controller for 3 minutes or indoor unit does not receive any

signal from the main controller for 2 minutes.

1. Contact failure with transmission cable 1. Check connection cable for damage or loose connections at the FTC and main controller terminals.

2. Wiring procedure not observed.

(Cable length/cable diameter/number

of indoor units/number of main controllers)

2. Check main controller and FTC common

wiring max cable length 500 m.

Only use 2 core cable. Only connect 1 main controller to 1 FTC indoor unit board.

3. Fault on the indoor unit FTC board

section controlling Ref. address "0"

3. to 5.

If the problem is not solved by the above measures then:

Turn the power to the indoor unit OFF and

then ON.

Power to both the indoor unit and outdoor units should be switched OFF then ON. (This may require switching 1 or 2 breakers depending if the unit is powered independently

from the outdoor unit). If the E4 code is still displayed the FTC and/ or the main controller circuit board should be replaced.

4. Fault with the main controller circuit

board

5. Electrical noise causes interference

with transmission/reception of data for

main controller.

E3/E5 Main controller communication failure

(Transmission error)

Error code E3 is displayed if the main controller

an not nd an empty transmission path and thus

fails to transmit for 6 secs or the data received by

the main controller is different to what was sent

(by the main controller) 30 consecutive times.

Error code E5 is displayed if the FTC can not nd

an empty transmission path for 3 minutes and thus cannot transmit or the data sent by the FTC

is different to what was expected 30 consecutive

times.

1. 2 or more main controllers have been

connected to the FTC.

1. Only connect 1 main controller to 1 FTC indoor unit board.

2. Fault with main controller transmission/

receiving circuit board

2. to 4.

Turn the power to the indoor unit OFF and

then ON.

Power to both the indoor unit and outdoor units should be switched OFF then ON. (This may require switching 1 or 2 breakers depending if the unit is powered independ-

ently from the outdoor unit). If the E3/E5 code is still displayed the FTC and/or the main controller circuit board should be replaced.

3. Fault with the main controller circuit board

4. Electrical noise causes interference

with transmission/reception of data for

main controller.

E6 Indoor/outdoor communication failure

(Reception error)

Error code E6 is displayed if after the power is switched ON to the indoor unit, the FTC board does not receive any signal or the signal received

is not complete for 6 minutes, or after a period of operation the FTC board does not receive any

signal or the signal received is not complete for 3

minutes.

* Check the LED display on the outdoor unit

circuit board. (Connect the A-control service tool, PACSK52ST to test.) Refer to the outdoor unit service manual for explanation of EA-EC codes.

1. Contact failure/short circuit/miswiring 1. Check the connections on the indoor and

outdoor units have not become loose and

that the connecting cable is not damaged.

2. Fault with outdoor unit transmission/ receiving circuit board

2. to 4.

Turn the power to the indoor unit OFF and

then ON.

Power to both the indoor unit and outdoor units should be switched OFF then ON. (This may require switching 1 or 2 breakers depending if the unit is powered independ-

ently from the outdoor unit). If the E6 code is still displayed the FTC and/or the outdoor unit circuit board should be replaced.

3. Fault with FTC transmission/receiving circuit board

4. Electrical noise causes interference

with FTC-Outdoor unit transmission

cable.

E7 Indoor/outdoor communication failure

(Transmission error)

Error code E7 is displayed if signal "1" is received

30 consecutive times despite the FTC board

sending signal "0".

1. Fault with FTC transmission/receiving circuit board

1. to 3.

Turn the power to the indoor unit OFF and

then ON.

Power to both the indoor unit and outdoor units should be switched OFF then ON. (This may require switching 1 or 2 breakers depending if the unit is powered independ-

ently from the outdoor unit). If the E7 code is still displayed the FTC circuit board should be replaced.

2. Electrical noise causes interference

with power supply.

3. Electrical noise causes interference with FTC-outdoor unit transmission cable.

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Error code Title and display conditions Possible Cause Diagnosis and action

E1/E2

Main controller control board failure

Error code E1 displayed if main controller can not

access it's non volatile (non power dependent)

memory.

Error code E2 is displayed when there is a fault with the main controller's internal clock.

1. Fault with the main controller circuit board

1. Replace main controller circuit board.

J0 Indoor unit/wireless receiver communication

failure

Error code J0 is displayed when the FTC can not receive data from the wireless receiver for 1 min-

ute.

1. Connection fault with wireless receiver- FTC connection

1. Check the connections to the wireless receiver and FTC have not become loose and

that the connecting cable is not damaged.

2. Fault with FTC receiving circuit board 2. to 4. Turn the power to the indoor unit OFF and

then ON.

Power to both the indoor unit and outdoor units should be switched OFF then ON. (This may require switching 1 or 2 breakers depending if the unit is powered independ-

ently from the outdoor unit).

If the J0 code is still displayed the FTC and/ or the wireless receiver circuit board should

be replaced.

3. Fault with wireless receiver's transmis-

sion circuit board

4. Electrical noise causes interference

with wireless receiver communication

cable.

J1 to J8 Wireless remote controller/wireless receiver

communication failure (Reception error)

Error code displayed if wireless receiver receives no/incomplete data from the wireless remote

controller for 15 consecutive minutes.

The digit after the J refers to the address of the wireless remote controller that has the error. E.g. Error code "J3" refers to a communication fault between the wireless receiver and wireless remote control with address 3.

1. Battery on wireless remote control may

be at

1. Check and replace the battery if necessary

the wireless remote controller battery.

2. The wireless remote controller is out of

range of the wireless receiver.

2. to 4.

Reposition the wireless remote control closer

to the receiver and perform a communication test.

For procedure refer to wireless remote

controller installation manual.

If "OK" is displayed then the cause of the J1 to J8 error was the controller was out of range of the receiver. The wireless remote controller should be installed within range of the receiver. If "Err" is displayed replace wireless remote controller with a new controller and perform the pairing procedure. If after this procedure the "Err" code is still displayed the fault is with the receiver unit

(attached to the indoor unit).

The receiver unit should be replaced with a new part and the original remote control can

be reconnected.

If "OK" is displayed then the fault is with the

remote control and this should be replaced.

3. Fault with wireless remote controller

transmission circuit board

4. Fault with wireless receiver's reception

circuit board

J9 Main controller communication failure

Error code J9 is displayed when signal is not

received normally from FTC (slave) for 3 minutes.

Refer to error codes (E0 and E4)

Note: To cancel error codes please switch system off (press button F4 (RESET) on main controller).

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Page 48

10-5. Troubleshooting by inferior phenomena

No. Fault symptom Possible cause Explanation - Solution

1 Main controller display

is blank.

1. There is no power supply to main controller.

1. Check LED2 on FTC. (See 6. WIRING DIAGRAM)

(i) When LED2 is lit.

Check for damage or contact failure of the main controller wiring.

(ii) When LED2 is blinking.

Refer to No. 5 below.

(iii) When LED2 is not lit.

Refer to No. 4 below.

2. Power is supplied to main controller, however, the display on the main

controller does not appear.

2. Check the following:

• Disconnection between the main controller cable and the FTC control board

• Failure of the main controller if “Please Wait” is not displayed.

• Refer to No. 2 below if “Please Wait” is displayed.

2 “Please Wait” remains

displayed on the main controller.

1. "Please Wait" is displayed for up to 6 minutes.

1. Normal operation.

2. Communication failure between the main controller and FTC.

2, 3.

Main controller start up checks/procedure.

(i) If “0%” or “50-99%” is displayed below "Please Wait" there is a

communication error between the main controller and the FTC control board.

• Check wiring connections on the main controller.

• Replace the main controller or the FTC control board.

(ii) If “1-49%” is displayed there is a communication error between the outdoor

unit's and FTC's control boards.

• Check the wiring connections on the outdoor unit control board and the FTC

control board.

(Ensure S1 and S2 are not cross-wired and S3 is securely wired with no damage. (See 7. FIELD WIRING)

• Replace the outdoor unit's and/or the FTC's control boards.

3. Communication failure between FTC and outdoor unit.

3 The main screen

appears with a press

of the “ON” button, but disappears in a second.

The main controller operations do not work for a while after the settings are changed in

the service menu. This is because the system

takes time to apply the changes.

Normal operation.

The indoor unit is applying updated settings made in the service menu. Normal operation will start shortly.

4 LED2 on FTC is off.

(See 6. WIRING DIAGRAM)

When LED1 on FTC is also off. (See 6.

WIRING DIAGRAM)

1. The outdoor unit is not supplied at the

rated voltage.

1. Check the voltage across the terminals L and N or L3 and N on the outdoor power board. (See 7. FIELD WIRING)

• When the voltage is not 220 to 240V AC, check wiring of the outdoor unit and

of the breaker.

• When the voltage is at 220 to 240V AC, go to “2.” below.

2. Defective outdoor controller circuit board. 2. Check the voltage across the outdoor unit terminals S1 and S2. (See 7. FIELD WIRING)

• When the voltage is not 220 to 240V AC, check the fuse on the outdoor control board and check for faulty wiring.

• When the voltage is 220 to 240V AC, go to “3.” below.

3. FTC is not supplied with 220 to 240V AC.

3. Check the voltage across the indoor unit terminals S1 and S2. (See 7. FIELD WIRING)

• When the voltage is not 220 to 240V AC, check FTC-outdoor unit wiring for

faults.

• When the voltage is 220 to 240V AC, go to “4.” below.

4. FTC failure. 4. Check the FTC control board.

• Check the fuse on FTC control board.

• Check for faulty wiring.

• If no problem found with the wiring, the FTC control board is faulty.

5. Faulty connector wiring. 5. Check the connector wiring.

• When the connectors are wired incorrectly, re-wire the connectors referring to below. (See 7. FIELD WIRING)

CN01

White

Hydrobox control board

BLACK

YELLOW

BLACK

Initial settings

(Power supplied

by outdoor unit)

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Page 49

No. Fault symptom Possible cause Explanation - Solution

4 LED2 on FTC is off.

(See 6. WIRING DIAGRAM)

1. FTC is not supplied with 220 to 240V AC. 1. Check the voltage across the L and N terminals on the indoor power supply terminal block. (See 7. FIELD WIRING)

• When the voltage is not 220 to 240V AC, check for faulty wiring to power

supply.

• When the voltage is 220 to 240V AC, go to 2. below.

2. There are problems in the method of

connecting the connectors.

2. Check for faulty wiring between the connectors.

• When the connectors are wired incorrectly re-wire them correctly referring to below. (See 7. FIELD WIRING and a wiring diagram on the control and

electrical box cover.)

CN01

• If no problem found with the wiring, go to 3. below.

3. FTC failure 3. Check the FTC control board.

• Check the fuse on FTC control board.

• Check for faulty wiring.

• If no problem found with the wiring, the FTC control board is faulty.

When LED1 on FTC is lit. Recheck the refrigerant address setting on the outdoor unit.

Set the refrigerant address to “0”. (Set refrigerant address using SW1(3 - 6) on outdoor controller circuit board.)

Incorrect setting of refrigerant address for

outdoor unit.

(None of the refrigerant address is set to "0".)

5 LED2 on FTC is

blinking.

(See 6. WIRING DIAGRAM)

When LED1 is also blinking on FTC . Check for faulty wiring between FTC and outdoor unit.

Faulty wiring between FTC and outdoor unit

When LED1 on FTC is lit.

1. Faulty wiring in main controller Multiple indoor units have been wired to a single outdoor unit.

1. Check for faulty wiring in main controller. The number of indoor units that can be wired to a single outdoor unit is one. Additional indoor units must be wired individually to a single outdoor unit.

2. Short-circuited wiring in main controller

2.,3.

Remove main controller wires and check LED2 on FTC. (See Figure 5.2.1. in

installation manual)

• If LED2 is blinking check for short circuits in the main controller wiring .

• If LED2 is lit, wire the main controller again and:

- if LED2 is blinking, the main controller is faulty;

- if LED2 is lit, faulty wiring of the main controller has been corrected.

3. Main controller failure

6 LED4 on FTC is off.

(See 6. WIRING DIAGRAM)

1. SD memory card is NOT inserted into the

memory card slot with correct orientation.

1. Correctly insert SD memory card in place until a click is heard.

2. Not an SD standards compliant memory card. 2. Use an SD standards compliant memory card. (Refer to section 5.8. in installation manual)

LED4 on FTC is blinking.

(See 6. WIRING DIAGRAM)

1. Full of data. 1. Move or delete data, or replace SD memory card with a new one.

2. Write-protected. 2. Release the write-protect switch.

3. NOT formatted. 3. Refer to "5.8 Using SD memory card" in installation manual.

4. Formatted in NTFS le system. 4. FTC is Not compatible with NTFS le system. Use an SD memory card for-

matted in FAT le system.

7 No water at hot tap. 1. Cold main off 1. Check and open stop cock.

2. Strainer (local supply) blocked. 2. Isolate water supply and clean strainer.

8 Cold water at tap. 1. Hot water run out. 1. Ensure DHW mode is operating and wait for DHW tank to re-heat.

2. Prohibit, schedule timer or holiday mode se-

lected.

2. Check settings and change as appropriate.

3. Heat pump not working. 3. Check heat pump – consult outdoor unit service manual.

4. Booster heater cut-out trip

ped

. 4. Check booster heater thermostat and press reset button if safe.

Reset button is located on the side of booster heater, covered with white rubber cap. See 4. PART NAMES AND FUNCTIONS to nd out its position.

The earth leakage circuit breaker for booster

heater breaker (ECB1) tripped.

5. Check the cause and reset if safe.

6. The booster heater thermal cut-out has

tripped and cannot be reset using the manual

reset button.

6. Check resistance across the thermal cut-out, if open then the connection is

broken and the booster heater will have to be replaced.

Contact your Mitsubishi Electric dealer.

7. Immersion heater cut-out tripped. 7. Check immersion heater thermostat and press reset button, located on im-

mersion heater boss, if safe. If the heater has been operated with no water inside it may have failed, so please replace it with a new one.

Immersion heater breaker (ECB2) tripped.

8. Check the cause and reset if safe.

9. 3-way valve fault 9. Check plumbing/wiring to 3-way valve.

(i) Manually override 3-way valve using the main controller. (Refer to <Man-

ual operation> in section 9-4.) If the valve does not still function, go to (ii) below.

(ii) Replace 3-way valve.

White

Hydrobox control board

YELLOW

BLACK

Modied settings (Separate power

supply to

the hydrobox)

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Page 50

No. Fault symptom Possible cause Explanation - Solution

9 Water heating takes

longer.

1. Heat pump not working. 1. Check heat pump – consult outdoor unit service manual.

2. Booster heater cut-out tripped. 2. Check booster heater thermostat and press reset button if safe.

Reset button is located on the side of booster heater, covered with white rubber cap. See 4. PART NAMES AND FUNCTIONS to nd out its position.

Booster heater breaker (ECB1) tripped.

3. Check the cause and reset if safe.

4. The booster heater thermal cut-out has

tripped and cannot be reset using the manual

reset button.

4. Check resistance across the thermal cut-out, if open then connection is bro-

ken and the booster heater will have to be replaced.

Contact your Mitsubishi Electric dealer.

5. Immersion heater cut-out has been triggered. 5. Check immersion heater thermostat and press reset button if safe. If the

heater kept running with no water inside, this may have resulted in failure, so replace it with a new one.

Immersion heater breaker (ECB2) tripped.

6. Check the cause and reset if safe.

10 Temperature of DHW

tank water dropped.

When DHW operation is not running, the DHW tank emits heat and the water temperature decreases to a certain level. If water in the DHW tank is reheated frequently because of a signicant drop in water temperature, check for the following.

1. Water leakage in the pipes that connect to the DHW tank

1. Take the following measures.

• Retighten the nuts holding the pipes onto the DHW tank.

• Replace seal materials.

• Replace the pipes.

2. Insulation material coming loose or off. 2. Fix insulation.

3. 3-way valve failure 3. Check plumbing/wiring to 3-way valve.

(i) Manually override 3-way valve using the main controller. (Refer to <Manual

operation> in section 9-4.) If the valve does not still function, go to (ii) below.

(ii) Replace 3-way valve.

11 Hot or warm water

from cold tap.

Heat of hot water pipe is transferred to cold water

pipe.

Insulate/re-route pipework.

12 Water leakage 1. Poorly sealed connections of water circuit

components

1. Tighten connections as required.

2. Water circuit components reaching the end of life

2. Refer to PARTS CATALOG in the service manual for expected part lifetimes and replace them as necessary.

13 Heating system does

not reach the set temperature.

1. Prohibit, schedule timer or holiday mode selected.

1. Check settings and change as appropriate.

2. Check settings and change as appropriate. 2. Check the battery power and replace if at.

3. The temperature sensor is located in a room that has a different temperature relative to that of the rest of the house.

3. Relocate the temperature sensor to a more suitable room.

4. Heat pump not working. 4. Check heat pump – consult outdoor unit service manual.

5. Booster heater cut-out tripped. 5. Check booster heater thermostat and press reset button if safe.

Reset button is located on the side of booster heater, covered with white rubber cap. (See 4. PART NAMES AND FUNCTIONS for position.)

Booster heater breaker (ECB1) tripped.

6. Check the cause of the trip and reset if safe.

7. The booster heater thermal cut-out tripped

and can not be reset using the manual reset

button.

Check resistance across the thermal cut-out, if open then the connection is bro-

ken and the booster heater will have to be replaced.

Contact your Mitsubishi Electric dealer.

8. Incorrectly sized heat emitter. 8. Check the heat emitter surface area is adequate

Increase size if necessary.

9. 3-way valve failure 9. Check plumbing/wiring to 3-way valve.

10. Battery problem (*wireless control only) 10. Check the battery power and replace if at.

11. If a mixing tank is installed, the ow rate be-

tween the mixing tank and the hydrobox is less than that between the mixing tank and

the local system.

11. Increase the ow rate between the mixing tank and the hydrobox decrease

that between the mixing tank and the local system.

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Page 51

No. Fault symptom Possible cause Explanation - Solution

14 In 2-zone tempera-

ture control, only Zone2 does not reach the set temperature.

1. When Zone1 and Zone2 are both in heating

mode, the hot water temperature in Zone2

does not exceed that in Zone1.

1. Normal action no action necessary.

2. Faulty wiring of motorized mixing valve 2. Refer to "5.3 Wiring for 2-zone temperature control" in installation manual.

3. Faulty installation of motorized mixing valve 3. Check for correct installation. (Refer to the manual included with each mo-

torized mixing valve.)

4. Incorrect setting of Running time 4. Check for correct setting of Running time.

5. Motorized mixing valve failure 5. Inspect the mixing valve. (Refer to the manual included with each motorized

mixing valve.)

15 When a PUHZ-

FRP outdoor unit is connected, DHW or

Heating operation

cannot run.

The outdoor unit is set to have operation of the indoor unit of air conditioner take precedence over that of the hydrobox, and in the main control-

ler settings "Electric heater (Heating)" or "Electric heater (DHW)" is turned off.

Turn ON Electric heater (Heating) or Electric heater (DHW) using the main con-

troller.

16 When a PUHZ-FRP

outdoor unit is connected and is in heat recovery operation, the set temperature is not reached.

When the outdoor unit is set to have cooling

operation of the indoor unit of air conditioner take precedence over that of the hydrobox, the outdoor unit controls the frequency of the compressor

according to the load of air conditioner. The DHW and heating run according to that frequency.

Normal operation no action necessary.

If Air-to-Water system is given priority in operation, comp Hz can be regulated depending on the load of DHW or Heating. For more details, refer to the PUHZ-

FRP installation manual.

17 After DHW operation

room temperature

rises slightly.

At the end of the DHW mode operation the 3-way valve diverts hot water away from the DHW circuit into space heating circuit.

This is done to prevent the hydrobox components

from overheating. The amount of hot water directed into the space heating circuit varies according to the type of the system and of the pipe run between the plate heat exchanger and the hydrobox.

Normal operation no action necessary.

The room tempera-

ture rises during DHW

operation.

3-way valve failure Check the 3-way valve.

19 Water discharges

from pressure relief valve. (Primary circuit)

1. If continual – pressure relief valve may be

damaged.

1. Turn the handle on the pressure relief valve to check for foreign objects in it. If the problem is not still solved, replace the pressure relief valve with a new

one.

2. If intermittent – expansion vessel charge may have reduced/bladder perished.

2. Check pressure in expansion vessel.

Recharge to 1 bar if necessary. If bladder perished replace expansion vessel with a new one.

20 Water discharges

from pressure relief

valve (eld supplied

item). (Sanitary circuit)

If continual – field supplied pressure reducing valve not working.

Check function of pressure reducing valve and replace if necessary.

2. If continual – pressure relief valve seat may

be damaged.

2. Turn the handle on the pressure relief valve to check for foreign objects inside. If the problem is not still solved, replace the pressure relief valve.

3. If intermittent – expansion vessel charge may have reduced/bladder perished.

3. Check gas-side pressure in expansion vessel.

Recharge to correct precharge pressure if necessary. If bladder perished replace expansion vessel with a new one with appropriate pre-charge.

4. DHW tank may have subjected to backow. 4. Check the pressure in DHW tank. If pressure in DHW tank is similar to that in

the incoming mains, cold water supply that merges with incoming mains water supply could ow back to DHW tank. Investigate source of back-feed and rectify error in pipework/tting conguration. Adjust pressure in cold supply.

21 Noisy water circula-

tion pump

Air in water circulation pump . Use manual and automatic air vents to remove air from system.

Top up water if necessary to achieve 1 bar on primary circuit.

22 Noise during hot

water draw off typically worse in the morning.

1. Loose airing cupboard pipework. 1. Install extra pipe fastening clips.

2. Heaters switching on/off. 2. Normal operation no action necessary.

23 Mechanical noise

heard coming from

the hydrobox.

1. Heaters switching on/off. Normal operation no action necessary.

3-way valve changing position between DHW and heating mode.

24 Water circulation

pump runs for a short time unexpectedly .

Water circulation pump jam prevention mechanism (routine) to inhibit the build-up of scale.

Normal operation no action necessary.

25 Milky/Cloudy water

(Sanitary circuit)

Oxygenated water Water from any pressurised system will release oxygen bubbles when water is

running. The bubbles will settle out.

Heating mode has

been on standby for

a long time (does

not start operation smoothly.)

The time of “Delay” set in “Economy settings

for pump” is too short. (Go to “Service menu”

→ “Auxiliary settings” → “Economy settings for

pump”).

Increase the time of “Delay” in “Economy settings for pump” .

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Page 52

No. Fault symptom Possible cause Explanation - Solution

The hydrobox that

was running in the heating mode before power failure is running in the DHW mode after power

recovery.

The hydrobox is designed to run in an operation mode with a higher priority (i.e. DHW mode in this case) at power recovery.

• Normal operation.

• After the DHW max. operation time has elapsed or the DHW max. temperature has been reached, the DHW mode switches to the other mode (ex. Heating

mode).

Cooling mode is NOT

available.

DIP SW2-4 is OFF. Turn DIP SW2-4 to ON. (Refer to “6-6 DIP switch settings” in this manual.)

The cooling system does not cool down to

the set temperature.

1. When the water in the circulation circuit is un-

duly hot, Cooling mode starts with a delay for

the protection of the outdoor unit.

1. Normal operation.

2. When the outdoor ambient temperature is

lower than the preset temperature that activates the freeze stat. function, Cooling mode does not start running.

2. To run Cooling mode overriding the freeze stat. function, adjust the preset temperature that activates the freeze stat. function.

(Refer to "<Freeze stat function>" on Page 28.)

The electric heaters are activated shortly

after DHW or LP mode starts running after Cooling mode.

The setting time period of Heat-pump-only opera-

tion is short.

Adjust the setting time period of Heat-pump only operation. (Refer to “<Electric heater (DHW)> on Page 26.

During DHW or LP mode following the cooling mode, error L6 (circulation water

freeze protection error ) occurs and the system stops all the operations.

The unit runs in Cooling mode when the outdoor ambient temperature is lower than 10ºC (outside of the guaranteed operating range). (When defrosting operation is running at such a low outdoor ambient temperature after Cooling mode is switched to DHW or LP mode, the water temperature in the cooling circuit drops too low, which could result in L6 error to stop all the opera-

tions.

Do not run Cooling operation when the outdoor ambient temperature is lower than 10ºC. To automatically stop or recover only Cooling operation and keep other operations running, the freeze stat. function can be used. Set the preset temperature

that activates the freeze stat. function to adjust the outdoor ambient temperature

as follows. (Refer to "<Freeze stat function>" on Page 28.)

Outdoor ambient temperature Cooling operation

3ºC higher than the preset temperature Stop 5ºC higher than the preset temperature Recover

The energy monitor

value seems not correct.

1. Incorrect setting of the energy monitor 1. Check the setting by following the procedure below. (1) Check if the DIP switch is set as the table below. Consumed electric energy

SW3-4

Electric energy meter (Local supply)

OFF Without ON With

(2) In the case external electric energy meter and/or heat meter is not used,

check if the setting for electric heater and water pump(s) input is correct by referring to <Energy monitor setting> in section 9-4.

(3) In the case external electric energy meter and/or heat meter is used, check if

the unit of output pulse on external meter matches with the one set at the main controller by referring to <Energy monitor setting> in section 9-4.

2. Non-connectable type of external meter (local

supply) is connected.

2. Check if the external meter (local supply) is connectable type by referring to

<Energy monitor setting>" in section 9-4.

3. External meter (local supply) failure 3. Check if signal is sent to IN8 to IN10 properly. (Refer to section 6. WIRING

DIAGRAM) Replace the external heat meter if defective.

4. FTC board failure 4. Check the FTC control board.

• Check for faulty wiring.

• If no problem found with the wiring, the FTC control board is faulty. Replace the

board.

Annual Maintenance

It is essential that the hydrobox is serviced at least once a year by a qualied individual any spare parts required MUST be purchased from Mitsubishi Electric (safety

matter).

NEVER bypass safety devices or operate the unit without them being fully operational.

<Draining the hydrobox> WARNING: DRAINED WATER MAY BE VERY HOT

1. Before attempting to drain the hydrobox isolate from the electrical supply to prevent booster heater burning out.

2. Isolate hydrobox from primary water circuit and drain water from hydrobox. Use a suitable heat resistant hose to assist in these operations.

3. Drain any remaining water from booster heater using tted drain cock and hose to safely drain the unit.

4. After the hydrobox is drained, water remains in the following component parts. Drain water completely by checking the inside of the parts.

• Strainer (Remove the strainer cover.)

• Pressure relief valve (Operate the valve.)

Use the Annual Maintenance Log Book (Section 13-2.) as a guide to carrying out the necessary checks on the hydrobox and outdoor unit.

Delivered heat energy

SW3-8

Heat meter

(Local supply)

OFF Without ON With

OCH571

Page 53

10-6. Checking Component Parts' Function

Part Name Check Points

Signal cable

Power cable

BROWN

PWM input signal

Feedback signal

Signal ref.

BLUE

BROWN

GREEN/ YELLOW

BLUE

BLACK

M 1~

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 2 5.0 30.0 35.0 40 .0 45.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

<Recommendedwaterowraterange>

External static pressure [kPa]

Flow rate [L/min]

* For installation of EHPX series, set its pump speed with a pressure drop between the

hydrobox and the outdoor unit factored into the external static pressure.

Speed 5 (Default) Speed 4 Speed 3 Speed 2 Speed 1

External static pressure [kPa]

Flow rate [L/min]

External static pressure [kPa]External static pressure [kPa]

EHSC series

EHSD series

ERSC series

ERSD series

EHPX series

Speed 5 (Default) Speed 4 Speed 3 Speed 2 Speed 1

Flow rate [L/min]

External static pressure [kPa]

Speed 5 (Default) Speed 4 Speed 3 Speed 2 Speed 1

Outdoor heat pump unit Waterowraterange[L/min]

Packaged

model

PUHZ-W50 7.1-14.3 PUHZ-W85 10.0-25.8 PUHZ-W112 14.4-27.7 PUHZ-HW112 14.4-27.7 PUHZ-HW140 17.9-27.7

Split model SUHZ-SW45 7.1-12.9

PUHZ-SW40 7.1-11.8 PUHZ-SW50 7.1-17.2 PUHZ-FRP71 11.5-22.9 PUHZ-SW75 10.2-22.9 PUHZ-SW100 14.4-27.7 PUHZ-SW120 20.1-27.7 PUHZ-SHW80 10.2-22.9 PUHZ-SHW112 14.4-27.7 PUHZ-SHW140 17.9-27.7

* If the water ow rate is less than 7.1 L/min, the ow rate error will

be activated.

If the water ow rate exceeds 27.7 L/min, the ow speed will be greater than 1.5 m/s, which could erode the pipes.

OCH571

Page 54

Part Name Check Points

Earth leakage circuit breaker for heater If a short circuit occurs on the booster heater, immersion heater, or each power line, a

short-circuit breaker will trip and power source will be blocked. Eliminate the causes of short circuit and then turn on the breaker again.

Relay for heater

R S T A1 A2

U V W

When the applied voltage is not 230V AC across the terminals A1-A2, check the terminals

R-U, S-V, and T-W are open.

When the applied voltage is 230V AC across the terminals A1-A2, check the terminals

R-U, S-V, and T-W are short.

Booster heater Measure the resistance between the terminals with a tester.

Thermostat (90 °C) and thermal cut out (121 °C)

90 °C Manual reset water thermostat

121 °C Thermal cut-out

AWG18

Terminal Normal Abnormal

9-10 110(±35)mΩ Open or Short

2kW heater (230V, 1 phase)

2kW

AWG15 FEP

WHITE

AWG15 FEP

WHITE

Terminal Normal Abnormal

1-2 26.5(+3/-1.3)Ω Open or Short

2 + 4kW heater (230V, 1 phase)

2kW

AWG15 FEP

WHITE

AWG15 FEP

WHITE

2kW

AWG13 FEP

BLUE

AWG13 FEP

BLUE

2kW

Terminal Normal Abnormal

1-2 26.5(+3/-1.3)Ω Open or Short 3-4 13.3(+1.5/-0.6)Ω Open or Short

3 + 6kW heater (400V, 3 phase)

Terminal Normal Abnormal

1-2=2-3=1-3 105.8(+11.8/-5)Ω Open or Short 4-5=5-6=4-6 52.9(+5.8/-2.5)Ω Open or Short

3 + 6kW heater (230V, 3 phase)

Terminal Normal Abnormal

1-2=2-3=3-1

35.3(+3.9/-1.8)Ω Open or Short

4-5=5-6=6-4 17.6(+1.9/-0.9)Ω Open or Short

5 6

AWG13 FEP

BLUE

AWG13 FEP

BLUE

AWG15 FEP

WHITE

AWG13 FEP

BLUE

2kW 2kW

2 31

1kW 1kW

AWG15 FEP

WHITE

AWG15 FEP

WHITE

2kW

1kW

5 6

AWG13 FEP

BLUE

AWG13 FEP

BLUE

AWG15 FEP

WHITE

2kW

AWG13 FEP

BLUE

2kW 2kW

2 3

1kW

1kW 1kW

AWG15 FEP

WHITE

AWG15 FEP

WHITE

OCH571

Page 55

Part Name Check Points

Thermistors Disconnect the connector then measure the resistance with a tester.

(At ambient temperatures of 10 - 30°C.)

Flow sensor

Thermistor Normal Abnormal

TH1

4.3 - 9.5 kΩ Open or short

TH2 THW1 THW2 THW5 THW6 THW7 THW8 THW9 THWB1

40 - 100 kΩ Open or short

THWB2

Yellow

White

Green

Brown

Flow signal V

5V DC

CN1A

Flow signal

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0 0 20 40 60 80 100

Flow [l/min]

Flow output signal[V]

0.35V

OCH571

Page 56

-20 -10 0 10 20 30 40 50

Temperature (:)

Resistance (k")

10 0

20 0

30 0

40 0

50 0

60 0

70 0

80 0

90 0

10 00

-3 0 -2 0 - 10 0 10 20 30 40 50 60 70 80

Temperature (°C)

Resistance (kΩ)

• Boiler flow water temperature thermistor (THWB1)

• Boiler return water temperature thermistor (THWB2)

• Room temperature thermistor (TH1)

• Liquid refrigerant temperature thermistor (TH2)

• Flow water temperature thermistor (THW1)

• Return water temperature thermistor (THW2)

• DHW tank temperature thermistor (THW5)

• Zone 1 ow water temperature thermistor (THW6)

• Zone 1 return water temperature thermistor (THW7)

• Zone 2 ow water temperature thermistor (THW8)

• Zone 2 return water temperature thermistor (THW9)

0°C 15kΩ 10°C 9.6kΩ 20°C 6.3kΩ 25°C 5.2kΩ 30°C 4.3kΩ 40°C 3.0kΩ

Thermistor R0 = 15kΩ ± 3% B constant = 3480 ± 2%

Rt = 15exp {3480 (

273+t

–

273

)}

0°C 162.8kΩ 10°C 97.4kΩ 20°C 60.3kΩ 25°C 48.1kΩ 30°C 38.6kΩ 40°C 25.4kΩ 50°C 17.1kΩ 60°C 11.9kΩ 70°C 8.4kΩ 80°C 6.0kΩ

Thermistor R100 = 3.3kΩ ± 2%

B constant = 3970 ± 1%

Rt = 3.3exp {3970 (

273+t

–

273

)}

OCH571

Page 57

CN3C Transmission (Indoor/Outdoor) (0 - 24V DC)

LED3

Transmission (Indoor/Outdoor)

CNP1/OUT1 (TBO.1 1-2) Water circulation pump1 (230V AC)

6.3A/250V

CN01

Power supply

(230V AC)

F1 10A/250V

CNPWM Water circulation pump 1 (2 - 3: 5V DC)

OUT12 (TBO.3 5-6)

Signal output (Defrost) (230V AC)

OUT8 (TBO.4 5-6)

Signal output (Cooling)

(230V AC)

CNIH/OUT9 (TBO.4 3-4)

Signal output for immersion

heater

(230V AC)

CNBHT Thermostat input for booster heater

IN7 (TBI.1 1-2)

Flow switch 3 input

CN22/RC(TBI.2 1-2) Main controller (10.4 - 13.7 V DC)

CNRF Transmission (Indoor/ Wireless receiver) (1-2: 11.5 - 13.2 V DC)

LED1 Power supply (FTC)

CN108 SD card

LED4 Reading or writing

data to SD card

LED2 Power supply

(Main controller)

THW9 (TBI.2 9-10) Thermistor (Zone2 return

water temp. )

THW7 (TBI.2 5-6) Thermistor (Zone1 return

water temp. )

THW6 (TBI.2 3-4) Thermistor

(Zone1 flow water temp. )

THWB1 (TBI.2 11-12) Thermistor

(Boiler flow water temp.)

THW8 (TBI.2 7-8) Thermistor

(Zone2 flow water temp. )

IN6 (TBI.1 3-4) Room thermostat 2 input

IN5 (TBI.1 5-6) Outdoor thermostat input

IN4 (TBI.1 7-8) Demand control input

IN3 (TBI.1 9-10)

Flow switch

2 input

IN1 (TBI.1 13-14) Room thermostat input

CNBC

Signal output for booster heater

(230V AC)

OUT11 (TBO.3 3-4)

Signal output (Error) (230V AC)

OUT5 (TBO.2 1-3)

Mixing valve (Local supply) (1-2[Close]: 230VAC) (2-3[Open]: 230VAC)

CNP4/OUT14 Water circulation pump4 (230V AC)

OUT3 (TBO.1 5-6) Water circulation pump3

(Local supply) (230V AC)

OUT2 (TBO.1 3-4) Water circulation pump2

(Local supply) (230V AC)

CNBH

Signal output for booster heater

(1-3: heater1 230V AC) (5-7: heater2 230V AC)

OUT13 (TBO.4 1-2)

2-way valve2 (230V AC)

10-7. Test point diagram

FTC (Controller board)

OUT4 (TBO.2 4-6)

3-way valve/2-way valve (Local supply)

(4-5: 230V AC)

OUT10 (TBO.3 1-2)

Signal output (Boiler) (non-voltage contact)

OUT15 (TBO.3 7-8)

Signal output (Comp on)

(230V AC)

IN2 (TBI.1 11-12)

Flow switch 1

input

IN8 (TBI.3 1-2)

Power meter 1

input

CN20 Thermistor (Room temp.)

CN21 Thermistor (Ref. liquid temp.)

CNW12 Thermistor

(1-2: Flow water temp.) (3-4: Return water temp.)

THWB2 (TBI.2 13-14) Thermistor (Bolier return

water temp. )

IN9 (TBI.3 3-4)

Power meter

2 input

CN1A

Flow sensor

input

CNW5 Thermistor (DHW tank

water temp.)

IN10 (TBI.3 5-6) Heat meter input

CN105 Transmission (Indoor/ WiFi adaptor) (1-2: 11.5 - 13.2 V DC)

OCH571

Page 58

PHOTOS & ILLUSTRATION

DISASSEMBLY PROCEDURE

● Prepare the proper tools.

● Prepare the proper protectors.

● Provide adequate ventilation.

● After stopping the operation of the hydrobox and outdoor unit, turn off the power-supply breaker and remove the power plug.

● Discharge the condenser before the work involving the electric parts.

● Allow parts to cool.

● Do not expose the electric parts to water.

● When replacing or servicing water circuit parts, drain system first.

Check individual illustrations and positions of the parts by referring to the parts catalog. Some lead wires and pipes are bundled with Bands. Cut the bands to undo the fastened pipes and lead wires if necessary. When bundling the lead wires and pipes again, use new commercially available bands. When removing the parts associated with water pipe work, drain the hydrobox as necessary. (Refer to "Draining the Hydrobox" on page 20.) When draining the hydrobox, keep water from splashing on the internal parts (mainly electric parts and insulations).

DISASSEMBLY PROCEDURE

Photo 1-1

Photo 1-2

Photo 2-2 Photo 2-3

Photo 2-1

1. How to remove the front panel

(1) Remove the 2 screws at the bottom of the hydrobox.

(Photo 1-1)

(2) Slightly lift and pull out the front panel from the hydrobox.

(Photo 1-1)

(3) Disconnect the relay connector connecting from the main

remote controller. (Photo 1-2)

2. How to remove the main remote controller

(1) Remove the front panel. (Refer to Procedure 1).

(2) Turn the front panel over and remove the 5 claws at the

white frame. (Photo 2-1)

(3)

Slide the main remote controller support upward, then remove it together with the main remote controller. (Photo 2-2)

(4) Separate the main remote controller from the main

remote controller support. (Photo 2-3)

Front panel

Main remote controller

Connector

Front panel

Main remote controller support

Claws

Screws

Claw

Main remote controller support

Main remote controller

OCH571

Page 59

DISASSEMBLY PROCEDURE

PHOTOS

Photo 3-3

3. How to remove the electrical parts

(Steps (1) through (3) are applied to all the following parts.)

(1) Remove the front panel. (Refer to Procedure 1).

(2) Remove the 3 screws holding the control box. (Photo

3-1)

(3) Slightly lift and pull out the control box. (Photo 3-1)

<Earth leakage circuit breaker> (Photo 3-2)

(4) Disconnect all the lead wires from the earth leakage cir-

cuit breaker.

(5) Remove the 2 screws on the earth leakage circuit break-

er.

Note: To avoid dropping of the breaker, hold the breaker by

hand when removing the last screws.

<Contactor> (Photo 3-2)

(4) Disconnect all the lead wires from the contactors. (5) Remove the 2 screws on each contactor.

Note: To avoid dropping of the contactors, hold the contac-

tors by hand when removing the last screws. To prevent an electrical shock, wait until all the LED

lamps on the FTC control board are turned off.

<Terminal block> (Photo 3-2)

(4) Disconnect all the lead wires from the terminal block. (To

disconnect the S1, S2 and S3 lead wires, disengage the locks by pressing on the claws.)

(5) Remove the screw on the terminal block.

Note: To avoid dropping of the terminal block, hold the termi-

nal block by hand when removing the screw .

<Controller board> (Photo 3-3)

(4) Disconnect all the lead wires from the controller board.

(5) Remove the controller board from the 4 board supports.

Photo 3-2

* The photos shown are of the EHSC-YM9C model.

Terminal block (TB1)

Earth leakage circuit

breaker (ECB1)

Contactors

Control box

Controller board

Screw

Photo 3-1

Control box fixing screws

Controller board

Screws

Board supports

OCH571

Page 60

DISASSEMBLY PROCEDURE

PHOTOS

Photo 4-1

* The photos shown are of the EHSC-YM9C model.

4. How to swing the control box to the front

(1) Remove the front panel. (Refer to Procedure 1.)

(2) Remove the screw from the control box bracket (R) and 2

screws from the control box bracket (L).

(3) Release the coated clamp.

(4) Disengage the control box bracket (R) from the right-hand

side panel and pull the control box. At this point, lifting slightly and pulling the control box will swing the control

box to the front. (Photo 4-2)

Note: Remove the field wiring as necessary.

Coated clamp

Earth cable

Bracket (R)

Side panel

Screw

Screws

Photo 4-2

Control box

Swing

OCH571

Page 61

DISASSEMBLY PROCEDURE

PHOTOS

Photo 5-1

5. How to remove water pump/ pump valve

E*S* series

Close the pump valve (OFF) before removing the water pump, and open the valves (ON) after reinstalling the water pump.

(1) Remove the front panel. (Refer to Procedure 1.) (2) Disconnect the CNP1 connector, the earth cable, and the

CNPWM connector in the control box. (Photo 5-1)

(3) Release the water pump lead wire from the 5 cable

clamps, the 2 cable straps, the coated clamp and feed

the lead wire out the control box without putting strain on

the CNP1 connector. (Photo 5-1)

(4)

Swing the control box to the front. (Refer to Procedure 4.)

(5) Close (OFF) the pump valve and remove the G1" nuts

using two spanners: one to hold the G1" nut and the other to turn the other side of G1" nut. Remove the water pump by sliding it horizontally. (Photo

5-2)

• When the pump valve handle is stiff, turn the handle 90 degrees clockwise mainly by using a spanner.

• When reinstalling the G1" nuts, use new G1" gaskets.

(Photo 5-3)

• Set the water pump in the way that the die stamped arrow facing down, and the terminal box facing to the

left. (Photo 5-2)

• When opening or closing the pump valve, ensure to do so fully, not halfway.

(6) Remove the screws fixing the pump valve stay. (Photo

5-2)

(7) Remove the pump valve by detaching the quick connec-

tion. (Photo 5-2)

• When reinstalling the quick connection, use new O-ring.

• When the pump valve handle is stiff, turn the handle 90 degrees clockwise mainly by using a spanner. (Photo

5-4)

• When reinstalling the pump valve, place the handle to the left hand side of the pump valve.

• When opening or closing the pump valve, ensure to do so fully, not halfway.

• Reuse the removed pump valve stay and the pump valve stay xing screws. (Photo 5-4)

• Refer to page 77 for how to attach and detach the quick

connection.

Note: Skip Steps (2) and (3) above when replacing the

pump valves only.

Photo 5-2(E*S* series)

Photo 5-3

(E*S* series)

Pump valve

Water pump connector (CNP1)

Earth cable

Cable clamps

Cable strapCable strap Coated clamp

Lead wire

O-ring

Photo 5-4(E*S* series)

CNPWM connector

Water pump

Nut (G1")

Gasket G1"

Screws

Gasket (G1")

Terminal box

Gasket (G1")

Pump valve stay

Quick connection

Screws

Pump valve stay

Flow direction

Cable clamps

Cable clamp

OCH571

Page 62

DISASSEMBLY PROCEDURE

PHOTOS

Photo 5-5(EHPX series)

Pump valve

5. How to remove water pump/ pump valve(continued)

EHPX series

Close the pump valve and strainer valve (OFF) before

removing the water pump, and open the valves (ON) after reinstalling the water pump.

(1) Remove the front panel. (Refer to Procedure 1.) (2) Disconnect the CNP1 connector, the earth cable, and the

CNPWM connector in the control box. (Photo 5-1)

(3) Release the water pump lead wire from the 5 cable

clamps, the 2 cable straps, the coated clamp and feed

the lead wire out the control box without putting strain on

the CNP1 connector. (Photo 5-1)

(4)

Swing the control box to the front. (Refer to Procedure 4.)

(5) Close (OFF) the pump valve and strainer valve, and

remove the G1" nuts using two spanners: one to hold the G1" nut and the other to turn the other side of G1" nut. Remove the water pump by sliding it up. (Photos 5-5)

•

When either of the pump valve handle or strainer valve

handle is stiff, turn the handle 90 degrees clockwise mainly by using a spanner.

• When reinstalling the G1" nuts, use new G1" gaskets.

(Photo 5-3)

•

Set the water pump in the way that the die stamped

arrow facing to the left, and the terminal box facing to the upper side. (Photo 5-2)

•

When opening or closing the pump valve and strainer

valve, ensure to do so fully, not halfway.

(6) Remove the screws fixing the pump valve stay. (Photo

5-5)

(7) Remove the pump valve by detaching the quick connec-

tion. (Photo 5-5)

•

When reinstalling the quick connection, use new O-ring.

•

When either of the pump valve handle or strainer valve

handle is stiff, turn the handle 90 degrees clockwise mainly by using a spanner.

• When reinstalling the pump valve, place the handle to

the upper side of the pump valve.

•

When opening or closing the pump valve, ensure to do

so fully, not halfway.

•

Reuse the removed pump valve stay and the pump

valve stay xing screws.

(Photo 5-4)

• Refer to page 77 for how to attach and detach the quick

connection.

Note: Skip Steps (2) and (3) above when replacing the

pump valves only.

Screws

Pump valve stay

O-ring

Quick connection

Flow direction

Nut

(G1")

Nut

(G1")

Gasket

(G1")

Gasket

(G1")

Terminal box

Strainer valve

OCH571

Page 63

DISASSEMBLY PROCEDURE

PHOTOS

Photo 6-1

Flow sensor

Photo 6-2

Photo 6-3

O-ring

6. How to remove the flow sensor

(1) Remove the front panel. (Refer to Procedure 1.) (2) Disconnect the CN1A connector on the controller board.

(Photo 6-1)

(3) Release the flow sensor lead wire from the cable clamp,

the 2 cable straps, the coated clamp and feed the lead

wire out the control box without putting strain on the

CN1A connector. (Photo 6-1)

(4)

Swing the control box to the front. (Refer to Procedure 4.)

(5) Remove the flow switch by removing the nut. (Photo 6-2)

• When reinstalling the nut, use a new O-ring. (Photo

6-3)

•

Set the flow sensor in the orientation of the arrow

printed on the flow sensor and in the way that the

sensor part faces to the left. (Photo 6-2)

Nut (G1")

Cable clamp

Cable strapCable strap Coated clamp

Lead wire

O-ring

Nut (G1")

O-ring

Sensor part

CN1A connector

OCH571

Page 64

O-ring

DISASSEMBLY PROCEDURE

PHOTOS

Photo 7-1

7. How to remove the booster heater

(1) Remove the front panel. (Refer to Procedure 1.) (2)

Disconnect the booster heater lead wires from the CNBHT

connector on the controller board and from the BHC1

(Lead wire No.1, No.2 and No.3) and BHC2 (Lead wire

No.4, No. 5 and No.6) contactors respectively. (Photo 7-1)

(3)

Swing the control box to the front. (Refer to Procedure 4.) Note: Do not mix up the lead wire numbers when

re-connecting the lead wires to the contactors as the lead wire numbers are different dependent on

the models.

<E*S* series>

(4) Remove the pump valve. (Refer to Procedure 5.)

(5) Remove the flow sensor. (Refer to Procedure 6.) (6) Remove the L joint and the pipe (L-F.S.) by detaching the

quick connection. (Photo 7-2)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

(7) Remove the flare nut (Photo 7-2).

(8) Remove the pipe (P.V.-B.H.) by detaching the quick

connection. (Photo 7-2)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

(9) Remove the two screws that hold the heater stay onto

the back panel. Lift the booster heater slightly and remove the booster heater with the heater stay from the

back panel. (Photo 7-2 and 7-3)

(10) Remove the 2 screws on the back of the heater stay

and remove the heater stay from the booster heater. (Photo 7-3)

• Reuse the removed heater stay and the heater stay xing screws.

Model Lead wire No. Contactor EHSC-VM6C EHSC-VM6EC

No.1 BHC1-U

No.2 BHC1-V

No.3 BHC2-U

No.4 BHC2-V

EHSC-YM9C EHSC-YM9EC EHSC-TM9C EHPX-YM9C

No.1 BHC1-U

No.2 BHC1-V

No.3 BHC1-W

No.4 BHC2-U

No.5 BHC2-V

No.6 BHC2-W

EHSD-VM2C EHSC-VM2C EHSC-VM2EC ERSD-VM2C EHPX-VM2C ERSC-VM2C

No.1 BHC1-U

No.2 BHC1-V

Refer to 6. WIRING DIAGRAM

Photo 7-2(E*S* series)

Photo 7-3

BHC2

BHC1

Booster heater connector (CNBHT)

Flare nut

Control box

Heater stay

Screw

O--ring

* The photos shown are of the EHSC-YM9C model.

Back panel

Cable strapCable strap Coated clamp

Earth leakage

breakers (ECB1)

Screw

Nut

Flow

sensor

Heater stay

Screws

Booster heater

Pump valve

No.1

No.2

No.3

No.4

No.5

No.6

L joint

Pipe

(L-F.S.)

Nut

Pipe (P.V.-B.H.)

Quick connection

OCH571

Page 65

DISASSEMBLY PROCEDURE

PHOTOS

7. How to remove the booster heater (continued)

(4) Detach the quick connection 1 and 2. (Photo 7-4)

• When reinstalling the quick connections, use new O-rings.

• Refer to page 77 for how to attach and detach the quick

connection.

(5) Remove the flare nut. (Photo 7-4) (6) Remove the saddle band by removing the screws on the

saddle band. (Photo 7-4)

(7) Remove the two screws that hold the heater stay onto

the back panel. Lift the booster heater slightly and remove the booster heater with the heater stay and the

pipe (to B.H.) from the back panel . (Photo 7-4 and 7-5)

(8) Remove the pipe (to B.H.) from the booster heater by

detaching the quick connection 3. (Photo 7-4)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

• Reuse the removed pipe (to B.H.).

(9)

Remove the 2 screws on the back of the heater stay and

remove the heater stay from the booster heater. (Photo 7-3)

Photo 7-4(EHPX series)

Photo 7-5(EHPX series)

Booster heater

Flare nut

Heater stay

Screw

O-ring

Back panel

Screws

O-ring

Saddle band

Quick connection 1

O-ring

Quick connection 3

Pipe (to B.H.)

Pump valve

Quick connection 2

OCH571

Page 66

DISASSEMBLY PROCEDURE

PHOTOS

Photo 8-1

8. How to remove the plate heat exchanger

(1) Pump down the refrigerant circuit and close the stop

valve on the outdoor unit. (Refer to "12. Supplementary information".)

(2) Remove the front panel. (Refer to Procedure 1.)

(3) Remove the water pump and the pump valve. (Refer to

Procedure 5.)

(4) Remove the expansion vessel. (Refer to Procedure 11.)

(5) Remove the saddle band (upper the pump) by removing

the 2 screws. (Photo 8-2)

(6) Remove the pipe (W.C.-W.P.) and the pipe (P.V.-B.H.) by

detaching the quick connections.

•

When reinstalling the quick connections, use new O-rings.

• Refer to page 77 for how to attach and detach the quick

connection.

Photo 8-2(ERSC series)

Water coil cover

Earth cable

Cable clamps

Cable strapCable strap Coated clamp

Lead wire

CNPWM connector

Water pump connector (CNP1)

Pump valve

Water pump

Nut (G1")

Screws

Booster heater

Screw

O-ring

Expansion vessel

Quick connection

Plate heat exchanger

(inside)

O-ring

Quick connection

Pipe (P.V.-B.H.)

Saddle band (upper the pump)

Pipe (W.C.-W.P.)

O-ring

Quick connection

Strainer valve

Gasket (G1")

Pipe (STR-W.C.)

Nut (G1")

OCH571

Page 67

DISASSEMBLY PROCEDURE

PHOTOS

8. How to remove the plate heat exchanger(continued) <ERSC series>

(7) Close the strainer valve and remove the G1" nut on the

water outlet side of the strainer valve using two

spanners: one to hold the strainer valve and the other to

turn the G1" nut. (Photo 8-2)

• When reinstalling the G1" nut, use a new G1" gasket.

• When the strainer valve handle is stiff, turn the handle 90 degrees clockwise mainly by using a spanner.

(Photot 8-2)

• When opening or closing the strainer valve, ensure to do so fully, not halfway.

(8) Remove the pipe (STR-W.C.) by detaching the quick

connection for the pipe and heat exchanger, then slide it to the right. (Photo 8-2)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

(9) Remove the TH2 thermistor from the thermistor holder.

(Photo 8-3)

(10) Remove the flare nuts on the gas and liquid pipes

under the hydrobox using two spanners: one to hold

each flare joint and the other to turn each flare nut.

(11) Remove the water coil cover by removing the 3 screws.

(Photo 8-2)

(12) Pull out the plate heat exchanger assembly from the

hydrobox by lifting it upward. (Photos 8-3 and 8-4)

Photo 8-3(ERSC series)

Photo 8-4

Plate heat exchanger

assembly

Plate heat exchanger

Strainer valve

TH2 thermistor

OCH571

Page 68

DISASSEMBLY PROCEDURE

PHOTOS

Procedure (1) to (6) is the same as <ERSC series>.

(7) Remove the G1" nut on the water inlet side of the

strainer valve using two spanners: one to hold the strainer valve and the other to turn the G1" nut. (Photo

8-5)

•

When reinstalling the G1" nut, use a new G1" gasket.

(8) Remove the TH2 thermistor from the thermistor holder.

(Photo 13-2)

(9) Remove the flare nuts on the gas and liquid pipes under

the hydrobox using two spanners: one to hold each flare

joint and the other to turn each flare nut.

(10) Remove the water coil cover by removing the 3 screws.

(Photo 8-5)

(11) Remove the 2 screws on the strainer valve stay. (Photo

8-6)

(12) Pull out the plate heat exchanger assembly with the

strainer valve from the hydrobox by lifting it upward.

(Photo 8-6)

(13) Remove the strainer valve from the plate heat

exchanger assembly by detaching the quick connection.

(Photos 8-4 and 8-6)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the

quick connection.

Screws

Strainer valve

Photo 8-5(EHSC series)

Screw

Water coil cover

Nut (G1")

Water pump

Gasket (G1")

Photo 8-6(EHSC series)

Screws

Strainer valve

Plate heat

exchanger

O-ring

Quick connection

Strainer valve stay

Pump valve

Plate heat exchanger

(inside)

OCH571

Page 69

DISASSEMBLY PROCEDURE

PHOTOS

Photo 8-7(E*SD series)

Plate heat exchanger

(inside)

Water pump

Nut (G1")

Screws

Screw

Booster heater

Screw

Screws

O-ring

Pipe (P.V.-B.H.)

O-ring

Strainer valve

8. How to remove the plate heat exchanger(continued)

Refer to the previous page for step (1) to (5). (Skip (4).)

<E*SD series>

(6) Remove the pipe (W.C.-W.P) and L joint (upper) together by

detaching the quick connection for the L joint (upper) and the plate heat exchanger. (Photo 8-7)

• When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

(7) Remove the pipe (P.V.-B.H.) by detaching the quick connection.

(Photo 8-7)

• When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

(8) Close the strainer valve. (Photo 8-7)

•

When the strainer valve handle is stiff, turn the handle 90 degrees clockwise mainly by using a spanner. (Photo 8-5)

• When opening or closing the strainer valve, ensure to do so fully, not halfway.

(9) Remove the saddle band (upper the strainer) by removing the 2

screws. (Photo 8-7)

(10) Detach the quick connection for the L joint (Lower) and the plate

heat exchnager, and rotate forward the pipe (to W.C.) with the L joint (lower) by using the quick connection (upper the strainer) as

a fulcrum.

• When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

(11)

Remove the TH2 thermistor from the thermistor holder. (Photo 8-7)

TH2 thermistor

Pipe (W.C.-W.P.)

Saddle band (upper the pump)

Quick connection

Saddle band

(upper strainer)

Quick connection

L joint (lower)

Pump valve

Water coil cover

Quick connection

L joint (upper)

Quick connection

(upper strainer)

Pipe (to W.C.)

OCH571

Page 70

Photo 8-8(E*SD series)

Photo 8-9(E*SD series)

Plate heat exchanger

assembly (inside)

DISASSEMBLY PROCEDURE

PHOTOS

Pump support

Plate heat exchanger

8. How to remove the plate heat exchanger(continued) <E*SD series>

(12) Remove the flare nuts on the gas and liquid pipes

under the hydrobox using two spanners: one to hold

each flare joint and the other to turn each flare nut.

(13) Remove the plate heat exchanger with water coil cover

by lifting it upward after removing the 2 screws on the water coil cover. (Photos 8-7 and 8-8)

(14) Remove the water coil cover and the water coil base by

removing the 6 screws. (Photo 8-9)

Water coil coverWater coil base

Screws

OCH571

Page 71

DISASSEMBLY PROCEDURE

PHOTOS

9. How to remove the strainer <ERS* / EHS* series>

(1) Remove the front panel. (Refer to Procedure 1.) (2)

Swing the control box to the front. (Refer to Procedure 4.)

(3) Close the strainer valve (OFF). (Photos 9-1 and 9-4)

• When the strainer valve handle is stiff, turn the handle

90 degrees clockwise mainly by using a spanner.

• When opening or closing the strainer valve, ensure to

do so fully, not halfway.

(4) Remove the 2 screws on the strainer valve stay. (Photos

9-1 and 9-4)

(5) Remove the G1" nut using two spanners: one to hold the

strainer and the other to turn the G1" nut. (Photos 9-1

and 9-4)

• When reinstalling the G1" nut, use new G1" gasket.

(6) Detach the quick connection. (Photos 9-1 and 9-4)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

• Reuse the removed strainer valve stay and the strainer

valve stay xing screws. (Photos 9-2 and 9-5)

(4) Remove the cover with two spanners: one to hold the

strainer valve and the other to turn the cover. (Photos 9-1 and 9-4)

•

Be sure to reattach the mesh after washing. (Photo 9-3)

• When reinstalling the cover , use a new packing.

Photo 9-1(ERS* series)

Photo 9-4(EHS* series)

Photo 9-2(ERS* series)

Photo 9-5(EHSC series)

Strainer mesh (inside)

Nut

(G1")

Cover

Gasket

(G1")

Photo 9-3

Strainer valve

O-ring

Strainer mesh (inside)

Cover

Nut (G1")

Gasket

(G1")

Strainer valve

Strainer mesh

Packing

Cover

Quick connection

Strainer valve stay

Screws

Strainer valve stay

Screws

O-ring

Quick connection

Strainer valve stay

Screws

Screw

OCH571

Page 72

DISASSEMBLY PROCEDURE

PHOTOS

9. How to remove the strainer(continued) <EHPX series>

(1) Remove the front panel. (Refer to Procedure 1.) (2)

Swing the control box to the front. (Refer to Procedure 4.)

(3) Close the strainer valve (OFF). (Photo 9-6)

• When the strainer valve handle is stiff, turn the handle

90 degrees clockwise mainly by using a spanner.

• When opening or closing the strainer valve, ensure to do so fully, not halfway.

(4) Remove the 2 screws on the strainer valve stay. (Photos

9-1 and 9-4)

(5) Remove the G1" nut using two spanners: one to hold the

strainer and the other to turn the G1" nut. (Photo 9-6)

•

When reinstalling the G1" nut, use new G1" gasket

(6)

Detach the quick connection, then remove the strainer valve

and L joint together by lifting them upward (Photo 9-6)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick connection.

(7) Remove the L joint by detaching the quick connection and

remove the strainer valve stay by removing the 2 screws.

(Photo 9-7)

•

When reinstalling the quick connection, use new O-ring.

• Refer to page 77 for how to attach and detach the quick

connection.

• Reuse the removed

L joint, the

strainer valve stay and

the strainer valve stay xing screws.

(4) Remove the cover with two spanners: one to hold the

strainer valve and the other to turn the cover.

•

Be sure to reattach the mesh after washing. (Photo 9-3)

• When reinstalling the cover , use a new packing.

Photo 9-6(EHPX series)

Photo 9-7(EHPX series)

Gasket (G1")

L joint

Strainer valve

Strainer valve stay

Screws

Nut (G1")

Quick connection

Strainer valve stay

Screws

O-ring

Quick connection

O-ring

L joint

OCH571

Page 73

DISASSEMBLY PROCEDURE

PHOTOS

Photo 10-4

Flare joint

Pressure relief valve

Threads for application of loctite

10. How to remove the manometer / pressure relief valve / air vent (automatic)

(1) Remove the front panel. (Refer to Procedure 1.) (2)

Swing the control box to the front. (Refer to Procedure 4.)

(3) Remove the screw on the manometer. (Photo 10-1) (4) Hold the sides of the manometer cover, disengage the

claws, and remove the manometer with cover. (Photo

10-1)

(5) Remove the G1/4" nut and feed the capillary tube

through out the hydrobox.

•

When reinstalling the G1/4" nut, use a new G1/4"

gasket. (Photo 10-2)

(6) Remove the manometer from the manometer cover while

pressing on the claws. (Photo 10-3)

•

When reinstalling the manometer assembly on the

hydrobox beware not to put strain on the root of the

capillary tube as the capillary tube is easy to break at the root.

(3) Remove the field piping from the pressure relief valve. (4) Remove the manometer by removing the G1/4" nut.

•

When reinstalling the G1/4" nut, use a new G1/4"

gasket. (Photo 10-2)

(5) Remove the pressure relief valve with a flare joint using

two spanners: one to hold the flare joint and the other to

turn the flare nut. (Photo 10-2)

(6) Remove the pressure relief valve using two spanners:

one to hold the flare joint and the other to turn the pressure relief valve. (Photo 10-4)

(7) Eliminate locktite on the thread surfaces using remover.

(Photo 10-4)

•

Before reinstallation, apply locktite over the thread

surface on the pressure relief valve.

• For more details about the locktite and the remover,

refer to Page 78.

Photo 10-3

Photo 10-1

Manometer

Manometer cover

Photo 10-2

Nut (G1/4")

Capillary tube

Claw

Pressure relief valve

Flare nut

Root

Gasket (G1/4")

Claw

Manometer

Claw

Screw

Claw

OCH571

Page 74

DISASSEMBLY PROCEDURE

PHOTOS

10. How to remove the manometer / pressure relief valve / air vent (automatic) (Continued)

(1) Remove the air vent with a flare joint using two

spanners: one to hold the flare joint and the other to turn the flare nut.

(2) Remove the flare joint from the air vent. (Photo 10-6)

11. How to remove the expansion vessel

(1) Remove the front panel. (Refer to Procedure 1.) (2)

Swing the control box to the front. (Refer to Procedure 4.)

(3) Remove the flare nut using two spanners: one to hold

the flare joint and the other to turn the flare nut. (Photo 11-1)

(4) Remove the 2 screws on the metal support.

Note: To avoid dropping of the expansion vessel, hold

the expansion vessel with the metal support by hand when removing the last screw.

(5) Pull out the metal support. (Photo 11-1) (6) Pull out the expansion vessel. (Photo 11-1) (7) Remove the flare joint from the expansion vessel.

(Photo 11-2)

•

When reinstalling the flare joint, use a new G3/8" gasket.

Note: To avoid dropping of the expansion vessel, hold it

securely when removing it.

Photo 11-2

Expansion vessel

Air vent

Photo 10-5

Air vent

Flare joint

Expansion vessel

Flare joint

Photo 10-6

Photo 11-1

Screws

Flare joint

Metal support

Flare nut

Gasket G3/8"

12. How to remove the drain cock (primary circuit)

(1) Remove the front panel. (Refer to Procedure 1.) (2)

Swing the control box to the front. (Refer to Procedure 4.)

(3) Remove the drain cock (primary circuit).

Photo 12-1 (E*S* series)

Booster heater

Drain cock

Photo 12-2 (EHPX series)

Booster heater

Drain cock

OCH571

Page 75

DISASSEMBLY PROCEDURE

PHOTOS

Photo 13-1

Photo 13-2(EHS* series)

13. How to remove the thermistor <liquid refrigerant temp.> (TH2) / thermistor <flow water temp. & return water temp.> (THW1, THW2)

(1) Remove the front panel. (Refer to Procedure 1.) (2) Remove the control box cover. (Refer to Procedure 3.)

(3) Disconnect the following connectors on the control

board.

▪ TH2 (CN21) ▪ THW1, THW2 (CNW12)

(4) Release the THW1, THW2 and TH2 lead wires from the

cable clamp, the 2 cable straps and the coated clamp.

Feed the lead wires out the control box without putting

strain on their connectors.

(5)

Swing the control box to the front. (Refer to Procedure 4.)

(6) Remove the thermistors from the thermistor holders.

(Photos 13-2, 13-3 and 13-4)

Earth leakage

breakers (ECB1)

Connectors (CN21) (CNW12)

THW2 thermistor

Cable clamp

Cable strapCable strap Coated clamp

Photo 13-3(EHPX series)

Photo 13-4(ERS* series)

THW1 thermistor

TH2 thermistor

THW1 thermistor

THW2 thermistor

TH2 thermistor

THW1 thermistor

THW2 thermistor

OCH571

Page 76

DISASSEMBLY PROCEDURE

PHOTOS

Photo 14-1

14. How to remove the drain pan (ERS*series)

(1) Remove the front panel.

(2) Disconnect all the field piping.

(3) Remove the saddle band and the rubber tube by

removing the 2 screws. Then remove the 2 screws fixing

the strainer valve stay. (Photos 14-1)

•

Reuse the removed saddle band, rubber tube and screws

fixing the saddle band and rubber tube.

(4) Remove the screw on the manometer cover, then

remove the manometer claw. (Photo 14-1)

(5) Remove 3 screws on the cover plate. (Photo 14-3)

(6) Remove the cover plate. (Photo 14-4)

(7) Remove 3 screws each on the side panel (L, R), and 2

screws on the underneath surface and base assy from

the hydrobox. (Photo 14-5)

(8) Remove 5 screws on the base assy. (Photo 14-6)

(9) Remove the drain pan from the base. (Photo 14-7)

(10) Remove the 2 screws fixing strainer valve holder, and

remove the strainer valve holder. (Photo 14-2)

•

Reuse removed the strainer valve holder and the

strainer valve holder fixing screws.

Photo 14-2

Photo 14-3

Photo 14-5

Drain pan

Screws

Photo 14-4

Base

Photo 14-6

Photo 14-7

Base assy

Base

Drain pan

Screws

Strainer valve stay

Cover plate

Claw

Manometer cover

Screw

Rubber tube

Saddle band

Strainer valve holder

Screws

Strainer valve

Screws

OCH571

Page 77

PHOTOS & ILLUSTRATION

DISASSEMBLY PROCEDURE

O-ring

Plastic

bag

15. How to detach and attach the quick joint

Refer to the following steps when detaching and attaching the

quick connection. (1) Remove the clip. (Photos 15-1 and 15-2)

(2) Separate the connected parts to remove the O-ring. (Photo

15-3)

• Do not reuse the removed O-ring.

• Wipe off if dirt or foreign matters are found on the sealing surface where the O-ring touches.

(3) Apply grease on the O-ring using a plastic bag, etc. (Photo

15-4)

(4) Attach the O-ring to the male part of quick connection. (Pho-

to 15-5)

• Keep the O-ring free from dirt or foreign matters.

(5)

Connect the male and female parts of the quick connection. (Photo 15-6)

(6) Attach the clip. (Photo 15-7)

• Ensure to attach the wider diameter of the clip to the female side. Failure to do so, it may cause water leak at the

connected part. (Photo 15-8)

Female Male

O-ring

Photo 15-1

Photo 15-2

Photo 15-3

Photo 15-4 Photo 15-5

Photo 15-6

Photo 15-7 Photo 15-8

Clip

Gap

OCH571

Page 78

Notes on replacing the parts

Replacement of the parts listed below requires the following procedure. After the parts are removed, eliminate loctite on threads by applying loctite remover, apply new loctite, and then install and tighten the parts to the specied tightening torques below. For details about recommended loctite and loctite remover, refer to Table 11-1, and for details about the replacement parts and their tightening torques, refer to Table 11-2.

Table 11-1

Recommended Manufacturer No. Note

Loctite Henkel Loctite 577 Apply loctite all over from the end of external thread to the second

ridge. After installing the parts, x the parts for at least 30 minutes

Loctite remover Henkel Loctite 7200 Gasket Remover Spray loctite remover over sealant on the threads, let the sealant

sit until soft, and then eliminate it with a wire brush.

Note: When using the products above, refer to the appropriate manuals that come with the individual products.

Table 11-2

Part name *1

Recommended tightening torque [Nm] *2

PRESSURE RELIEF VALVE 3bar 15 ± 1

*1. For more details about the listed parts, refer to the parts catalogue. *2. Undertightening and overtightening the parts affect water seal life. Tighten the parts to the appropriate tightening torques.

When installing the parts that are not listed above, observe the tightening torques in accordance with Table

11-3

Always use a new O

ring or gasket.

Table 11-3

Size

[inch]

Recommended tightening torque

[Nm]

Gasket

G1/4" 8 ± 1

G3/8" 15 ± 1

G1" 42 ± 2

Packing Strainer cover 40 ± 2

O-ring

Flow sensor 30 ± 2

Air vent (Automatic) 15 ± 1

Attached packing

Drain cock (primary circuit) 0.25 ± 0.05

Flare joint (for water circuit parts)

35 ± 2

After the procedure is complete, ensure that no water leaks.

OCH571

Page 79

SUPPLEMENTARY INFORMATION

12-1. Refrigerant collecting (pumpdown) for split model systems only

Refer to “Refrigerant collection” in the outdoor unit installation manual or service manual.

12-2. Back-up operation of boiler

Heating operation is backed up by boiler.

For more details, refer to the installation manual of PAC-TH011HT-E.

1. Set DIP-SW 1-1 to ON "With boiler" and SW2-6 to ON “With Mixing tank”.

2. Install the thermistors THWB1 (Flow temp.) and THWB2 (Return temp.) *1 on the boiler circuit.

3. Connect the output wire (OUT10: Boiler operation) to the signal input (room thermostat input) on the boiler. *2

4. Install one of the following room temp. thermostats. *3

Wireless remote controller (option) Room temp. thermostat (local supply) Main controller (remote position)

*1 The boiler temperature thermistor is an optional part.

*2 OUT10 has no voltage across it. *3 Boiler heating is controlled on/off by the room temp. thermostat.

1. Go to Service menu > Heat source setting and choose “Boiler” or “Hybrid”. *4

2. Go to Service menu > Operation settings > Boiler settings to make detailed settings for “Hybrid” above .

*4 The “Hybrid” automatically switches heat sources between Heat pump (and Electric heater) and boiler.

12-3. Multiple outdoor units control

To realize bigger systems by using multiple outdoor units, up to 6 units of the same model can by connected.

The hydrobox can be used as a slave unit for multiple outdoor unit control. For more details, refer to the installation manual of PAC-IF061/062B-E. PAC-IF051/052B-E can not be connected to the hydro box.

Check the model name of connecting master unit.

• Set DIP SW4-1 to ON “Active: multiple outdoor unit control”.

• Keep DIP SW4-2 OFF (default setting) (master/slave setting: slave).

• Set DIP SW1-3 to ON when the hydrobox is connected to a DHW tank.

OCH571

Page 80

SERVICE AND MAINTENANCE

The main controller settings changed from the default settings are reset by replacing the controller board. To facilitate reselecting settings on the main controller, it is recommended to write down the changes in the sheet below before replacement.

13-1. Engineers Forms

Should settings be changed from default, please enter and record new setting in ‘Field Setting’ column. This will ease resetting in the future should the system use change or the circuit board need to be replaced.

Commissioning/Field settings record sheet

Main controller screen Parameters Default setting

Field setting

Notes

Main Zone1 heating room temp. 10°C - 30°C 20°C

Zone2 heating room temp. *1 10°C - 30°C 20°C Zone1 heating ow temp. 25°C - 60°C 45°C Zone2 heating ow temp. *1 25°C - 60°C 35°C Zone1 cooling ow temp. *12 5°C - 25°C 15°C Zone2 cooling ow temp. *12 5°C - 25°C 20°C Zone1 heating compensation curve −9°C - + 9°C 0°C Zone2 heating compensation curve *1 −9°C - + 9°C 0°C

Holiday mode Active/Non active/Set time —

Option Forced DHW operation On/Off —

DHW On/Off/Timer On

Heating/Cooling On/Off/Timer On Energy monitor Consumed electrical energy/Delivered energy —

Setting DHW *13 Operation mode Normal/Eco Normal

DHW max. temp. 40°C - 60°C *2 50°C DHW temp. drop 5°C - 30°C 10°C DHW max. operation time 30 - 120 mins 60 mins DHW mode restriction 30 - 120 mins 30 mins

Legionella prevention *13 Active Yes/No Yes

Hot water temp. 60°C - 70°C *2 65°C

Frequency 1 - 30 days 15 days Start time 00.00 - 23.00 03.00 Max. operation time 1 - 5 hours 3 hours Duration of maximum temp. 1 - 120 min 30 min

Heating/ Cooling *12 Zone1 operation mode Heating room temp/ Heating flow temp/ Heating

compensation curve/ Cooling ow temp

Room temp

Zone2 operation mode *1 Heating room temp/ Heating flow temp/ Heating

compensation curve/ Cooling ow temp

Compensation

curve Compensation curve

Hi ow temp. set

point

Zone1 outdoor ambient temp. −30°C - +33°C *3 −15°C Zone1 ow temp. 25°C – 60°C 50°C Zone2 outdoor ambient temp. *1 −30°C - +33°C *3 −15°C

Zone2 ow temp. *1 25°C - 60°C 40°C

Lo ow temp. set

point

Zone1 outdoor ambient temp. −28°C - +35°C *4 35°C Zone1 ow temp. 25°C - 60°C 25°C Zone2 outdoor ambient temp. *1 −28°C - +35°C *4 35°C Zone2 ow temp. 25°C - 60°C 25°C

Adjust Zone1 outdoor ambient temp. −29°C - +34°C *5 —

Zone1 ow temp. 25°C - 60°C — Zone2 outdoor ambient temp. *1 −29°C - +34°C *5 — Zone2 ow temp. *1 25°C - 60°C —

Holiday DHW *13 Active/Non active Non active

Heating/ Cooling *12 Active/Non active Active Zone1 heating room temp. 10°C - 30°C 15°C Zone2 heating room temp. *1 10°C - 30°C 15°C Zone1 heating ow temp. 25°C - 60°C 35°C Zone2 heating ow temp. *1 25°C - 60°C 25°C Zone1 cooling ow temp. *12 5°C - 25°C 25°C Zone2 cooling ow temp. *12 5°C - 25°C 25°C

Initial settings Language

EN/FR/DE/SV/ES/IT/DA/NL/FI/NO/PT/BG/PL/CS/RU

°C/°F

°C

Summer time

On/Off

Off

Temp. display

Room/DHW tank/Room&DHW tank /Off

Off

Time display

hh:mm/hh:mm AM/AM hh:mm

hh:mm

Room sensor settings for Zone1

TH1/Main RC/Room RC1-8/“Time/Zone”

TH1

Room sensor settings for Zone2 *1

TH1/Main RC/Room RC1-8/“Time/Zone”

TH1

Room RC zone select *1 Zone1/Zone2 Zone1

Service menu Thermistor

adjustment

THW1 −10°C - +10°C 0°C THW2 −10°C - +10°C 0°C THW5 −10°C - +10°C 0°C THW6 −10°C - +10°C 0°C THW7 −10°C - +10°C 0°C THW8 −10°C - +10°C 0°C THW9 −10°C - +10°C 0°C THWB1 −10°C - +10°C 0°C THWB2 −10°C - +10°C 0°C

Auxiliary settings Economy settings for

pump.

On/Off *6 On Delay

10 mins

Electric heater

(Heating)

Space heating: On (used)/Off (not used) On

Electric heater delay timer (5 - 180 minutes) 30 mins Electric heater (DHW) *13

Booster heater

DHW: On (used)/Off (not used)

Immersion heater

DHW: On (used)/Off (not used)

Electric heater delay timer (15 - 30 minutes) 15 mins

Mixing valve control Running (10 - 240 secs) 120 secs

Interval (1 - 30 mins) 2 mins Flow sensor Minimum(0 - 100L/min.) 5 L/min.

Maximum(0 - 100L/min.) 100 L/min.

*1 The settings related to Zone2 can be switched only when 2 Zone temperature control is enabled (when DIP SW2-6 and SW 2-7 are ON). *2 For the model without both booster and immersion heater, it may not reach the set temperature depending on the outside ambient temperature. *3 The lower limit is -15°C depending on the connected outdoor unit. *4 The lower limit is -13°C depending on the connected outdoor unit. *5 The lower limit is -14°C depending on the connected outdoor unit.

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Page 81

Engineers Forms (2/2)

Commissioning/Field settings record sheet (continued from the previous page)

Main controller screen Parameters

Default setting

Field setting

Notes

Service menu Pump speed Pump speed(1 - 5) 5

Heat source setting Standard/Heater/Boiler/Hybrid *7 Standard Operation

settings

Heating operation*8Flow temp.range

*10

Min.temp.(25 - 45°C) 30°C Max.temp.(35 - 60°C) 50°C

Room temp.control Mode(Normal/Fast) Normal

Interval(10 - 60min.) 10min. Heat pump thermo diff.adjust

On/Off *6 On

Lower limit(-9 - −1°C) -5°C

Upper limit(+3 - +5°C) 5°C

Freeze stat function *11 Outdoor ambient temp. (3 - 20°C) / ** 5°C

Simultaneous operation (DHW/Heating)

On/Off *6 Off

Outdoor ambient temp. (−30 - +10°C) *4 −15°C

Cold weather function

On/Off *6 Off

Outdoor ambient temp. (−30 - −10°C) *4 −15°C

Boiler operation

Hybrid settings Outdoor ambient temp. (−30

- +10°C) *4

−15°C

Priority mode (Ambient/ Cost/CO

Ambient

Intelligent set-

tings

Energy

price *9

Electricity (0.001 999 */kWh)

0.5

*/kWh

Boiler (0.001 999 */kWh)

0.5

*/kWh

CO2 emission

Electricity

(0.001 - 999 kg

-CO2/kWh)

0.5 kg -CO2/kWh

Boiler (0.001

999 kg -CO2/

kWh)

0.5 kg -CO2/kWh

Heat source

Heat pump capacity (1

- 40 kW)

11.2

Boiler efciency (25

- 150%)

80%

Booster heater 1 capacity (0

- 30 kW)

2 kW

Booster heater 2 capacity (0

- 30 kW)

4 kW

Floor dry up function

On/Off *6 Off

Target temp. Start&Finish

(25 - 60°C) 30°C

Max. temp.

(25 - 60°C) 45°C

Max. temp. period

(1 - 20

days)

5 days

Flow temp.

(Increase)

Temp. increase step (+1 - +10°C)

+5°C

Increase interval (1 - 7 days)

2 days

Flow temp.

(Decrease)

Temp. decrease step (−1 - −10°C)−5°C

Decrease interval (1 - 7 days)

2 days

Energy

monitor

settings

Electric heater capacity

Booster heater 1 capacity

0 - 30kW 2kW

Booster heater 2 capacity

0 - 30kW 4kW

Immersion heater capacity

0 - 30kW 0kW

Delivered energy adjustment −50 - +50% 0% Water pump input Pump 1 0 - 200W or ***(factory tted pump) ***

Pump 2 0 - 200W 0W Pump 3 0 - 200W 0W

Electric energy meter 0.1/1/10/100/1000 pulse/kWh 1 pulse/kWh Heat meter 0.1/1/10/100/1000 pulse/kWh 1 pulse/kWh

External in-

put settings

Demand control (IN4) Heat source OFF/Boiler operation Boiler

operation

Outdoor thermostat (IN5)

Heater operation/Boiler operation Boiler

operation

*6 On: the function is active; Off: the function is inactive. *7 When DIP SW1-1 is set to OFF “WITHOUT Boiler” or SW2-6 is set to OFF “WITHOUT Mixing tank”, neither Boiler nor Hybrid can be selected. *8 Valid only when operating in Room temp. control mode. *9 “*” of “*/kwh” represents currency unit (e.g. € or £ or the like) *10 Valid only when operating in Heating room temperature. *11 If asterisk (**) is chosen freeze stat function is deactived. (i.e. primary water freeze risk) *12 Cooling mode settings are available for ERS * model only.

*13 Only availavle if DHW tank present in system.

OCH571

Page 82

13-2. Annual Maintenance Log Book

Contractor name Engineer name Site name Site number

Hydrobox maintenance record sheet Warranty number Model number

Serial number

No. Mechanical Frequency Notes

Isolate and drain hydrobox, remove mesh from internal strainer clean and replace.

Open the pressure relief valve, check for unrestricted discharge to

the tundish and that the valve reseats correctly. Check there are no

blockages in the tundish and associated pipe work.

Drop the primary/heating system pressure to zero check and if necessary

top up the expansion relief vessel (1 bar). Air valve of expansion vessel is TR-412.

Check and if necessary top up the concentration of anti-freeze/inhibitor (if used in the system).

Top up the primary/heating system using an appropriate lling loop and

re-pressurise to 1 bar.

Heat system and check pressure does not rise above 3 bar and no water

is released from the safety valves.

7 Release any air from the system.

Refrigerant models only [EXCEPT EHPX] Frequency Notes

1 Refer to outdoor unit manual.

Electrical Frequency Notes 1 Check condition of cables. 2 Check rating and fuse tted on the electricity supply.

Controller Frequency Notes 1 Check eld settings against factory recommendations. 2 Check battery power of wireless thermostat and replace if necessary.

Outdoor heat pump unit maintenance record sheet Model number Serial number

Mechanical Frequency Notes 1 Inspect grill, heat exchanger ns and air inlet for trapped debris/damage. 2 Check condensate drain provision. 3 Check integrity of water pipe work and insulation. 4 Check all electrical connections. 5 Check and record the operation voltage.

* All the above checks should be carried out once a year.

Note:

Withintherstcoupleofmonths ofinstallation,remove andcleanthe hydrobox’sstrainermeshplusanythatarettedexternaltothehydrobox. Thisis

especially important when installing on an existing system.

In addition to annual servicing it is necessary to replace or inspect some parts after a certain period of system operation. Please see tables below for detailed instructions. Replacement and inspection of parts should always be done by a competent person with relevant training and qualications.

Parts which require regular replacement

Parts Replace every Possible failures

Pressure relief valve (PRV) Air vent (Auto/Manual) Drain cock (Primary circuit) Manometer

6 years Water leakage

Parts which require regular inspection

Parts Check every Possible failures

Immersion heater 2 years

Earth leakage causing

circuit breaker to activate

(Heater is always OFF)

Water circulation pump 20,000 hrs (3 years)

Water circulation pump failure

Parts which must NOT be reused when servicing

* O-ring

* Gasket

Note: Always replace the gasket for pump with a new one at each regular maintenance (every 20,000 hours of use or every 3 years).

OCH571

Page 83

OCH571

Page 84

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Distributed in Oct. 2014 No. OCH571

Made in Japan

New publication, effective Oct. 2014 Specifications are subject to change without notice.

Mitsubishi EHSD-VM2C.UK, EHSC-VM2EC.UK, EHSC-MEC.UK, EHSC-VM2C.UK, EHSC-VM6C.UK Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual