RXYSCQ-TV1_IOM_4PEN399985-1C_2015_09

RXYSCQ-TV1_IOM_4PEN399985-1C_2015_09

Installation and operation manual

VRV IV-S system air conditioner

RXYSCQ4TMV1B    

RXYSCQ5TMV1B

Installation and operation manual

VRV IV-S system air conditioner

English

1

C c

D

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U d e

D

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D

E e e

B b

B

H

B a

C c

H

U e

D

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≥250

B b

≥250

D d

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H

B a

A

A~E H

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(mm) d e e

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b (mm)

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b

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B1 B2

B2

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≥250

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≥300

≥1000

3

2P406920-1

Table of Contents

Table of Contents

1 About the documentation

1.1

5

About this document..................................................................

5

For the installer 5

2 About the box

2.1

5

Outdoor unit...............................................................................

5

2.1.1

To remove the accessories from the outdoor unit.......

5

3 About the units and options

3.1

3.2

5

About the outdoor unit ...............................................................

5

System layout ............................................................................

5

4 Preparation

4.1

6

Preparing installation site ..........................................................

6

4.2

4.3

4.1.1

4.1.2

Installation site requirements of the outdoor unit ........

6

Additional installation site requirements of the outdoor unit in cold climates .......................................

6

Preparing refrigerant piping .......................................................

6

4.2.1

Refrigerant piping requirements..................................

6

4.2.2

Refrigerant piping material..........................................

6

4.2.3

4.2.4

To select the piping size .............................................

6

To select refrigerant branch kits..................................

7

Preparing electrical wiring .........................................................

7

4.3.1

Safety device requirements ........................................

7

5 Installation

5.1

5.2

5.3

5.4

5.5

5.6

5.7

5.8

8

Opening the units ......................................................................

8

5.1.1

To open the outdoor unit.............................................

8

Mounting the outdoor unit..........................................................

8

5.2.1

To provide the installation structure ............................

8

5.2.2

To install the outdoor unit............................................

8

5.2.3

5.2.4

To provide drainage ....................................................

To prevent the outdoor unit from falling over ..............

8

9

Connecting the refrigerant piping ..............................................

9

5.3.1

5.3.2

Using the stop valve and service port .........................

9

To connect the refrigerant piping to the outdoor unit .. 10

Checking the refrigerant piping .................................................

10

5.4.1

About checking the refrigerant piping ......................... 10

5.4.2

Checking refrigerant piping: General guidelines ......... 11

5.4.3

5.4.4

5.4.5

Checking refrigerant piping: Setup.............................. 11

To perform a leak test ................................................. 11

To perform vacuum drying .......................................... 11

To insulate the refrigerant piping...............................................

11

Charging refrigerant ..................................................................

12

5.6.1

5.6.2

5.6.3

Precautions when charging refrigerant ....................... 12

To determine the additional refrigerant amount .......... 12

To charge refrigerant .................................................. 12

5.6.4

5.6.5

Error codes when charging refrigerant........................ 13

To fix the fluorinated greenhouse gases label ............ 13

Connecting the electrical wiring.................................................

13

5.7.1

5.7.2

5.7.3

5.7.4

Field wiring: Overview................................................. 13

Guidelines when knocking out knockout holes ........... 14

Guidelines when connecting the electrical wiring ....... 14

To connect the electrical wiring on the outdoor unit.... 14

Finishing the outdoor unit installation ........................................

15

5.8.1

To finish the transmission wiring................................. 15

6 Configuration

6.1

15

Making field settings ..................................................................

15

6.1.1

About making field settings ......................................... 15

6.1.2

To access the field setting components...................... 15

6.1.3

6.1.4

6.1.5

Field setting components ............................................ 15

To access mode 1 or 2 ............................................... 16

To use mode 1 ............................................................ 16

Installation and operation manual

4

6.1.6

6.1.7

6.1.8

6.1.9

To use mode 2 ............................................................. 17

Mode 1 (and default situation): Monitoring settings ..... 17

Mode 2: Field settings.................................................. 18

To connect the PC configurator to the outdoor unit ..... 20

7 Commissioning

7.1

20

Precautions when commissioning .............................................. 20

7.2

7.3

Checklist before commissioning ................................................. 20

Checklist during commissioning ................................................. 20

7.3.1

About test run............................................................... 21

7.3.2

7.3.3

7.3.4

To perform a test run (7-LEDs display)........................ 21

Correcting after abnormal completion of the test run... 21

Operating the unit ........................................................ 21

8 Troubleshooting

8.1

21

Solving problems based on error codes ..................................... 21

8.1.1

Error codes: Overview ................................................. 21

9 Technical data

9.1

9.2

9.3

22

Service space: Outdoor unit ....................................................... 23

Piping diagram: Outdoor unit...................................................... 23

Wiring diagram: Outdoor unit ..................................................... 24

For the user 25

10 About the system 25

10.1

System layout ............................................................................. 25

11 User interface 25

12 Operation 25

12.1

Operation range ......................................................................... 25

12.2

Operating the system ................................................................. 25

12.2.1

About operating the system ......................................... 25

12.2.2

About cooling, heating, fan only, and automatic operation ...................................................................... 25

12.2.3

About the heating operation......................................... 25

12.2.4

To operate the system ................................................. 26

12.3

Using the dry program ................................................................ 26

12.3.1

About the dry program ................................................. 26

12.3.2

To use the dry program................................................ 26

12.4

Adjusting the air flow direction.................................................... 26

12.4.1

About the air flow flap .................................................. 26

12.5

Setting the master user interface ............................................... 26

12.5.1

About setting the master user interface ....................... 26

12.5.2

To designate the master user interface (VRV DX)....... 27

12.5.3

To designate the master user interface (RA DX) ......... 27

13 Maintenance and service 27

13.1

After-sales service and warranty ................................................ 27

13.1.1

Warranty period ........................................................... 27

13.1.2

Recommended maintenance and inspection............... 27

14 Troubleshooting 27

14.1

Error codes: Overview ................................................................ 28

14.2

Symptoms that are not air conditioner troubles .......................... 29

14.2.1

Symptom: The system does not operate ..................... 29

14.2.2

Symptom: Fan operation is possible, but cooling and heating do not work...................................................... 29

14.2.3

Symptom: The fan strength does not correspond to the setting .................................................................... 29

14.2.4

Symptom: The fan direction does not correspond to the setting .................................................................... 29

14.2.5

Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 29

14.2.6

Symptom: White mist comes out of a unit (Indoor unit, outdoor unit) ......................................................... 29

14.2.7

Symptom: The user interface display reads "U4" or

"U5" and stops, but then restarts after a few minutes .. 29

14.2.8

Symptom: Noise of air conditioners (Indoor unit)......... 29

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

14.2.9

Symptom: Noise of air conditioners (Indoor unit, outdoor unit)................................................................ 29

14.2.10 Symptom: Noise of air conditioners (Outdoor unit) ..... 29

14.2.11 Symptom: Dust comes out of the unit ......................... 30

14.2.12 Symptom: The units can give off odours..................... 30

14.2.13 Symptom: The outdoor unit fan does not spin ............ 30

14.2.14 Symptom: The display shows "88".............................. 30

14.2.15 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ...................... 30

14.2.16 Symptom: The inside of an outdoor unit is warm even when the unit has stopped ................................. 30

14.2.17 Symptom: Hot air can be felt when the indoor unit is stopped ....................................................................... 30

15 Relocation

16 Disposal

30

30

1 About the documentation

1.1

About this document

Target audience

Authorised installers + end users

1 About the documentation

INFORMATION

This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.

Documentation set

This document is part of a documentation set. The complete set consists of:

General safety precautions:

▪ Safety instructions that you must read before installing

▪ Format: Paper (in the box of the outdoor unit)

Outdoor unit installation and operation manual:

▪ Installation and operation instructions

▪ Format: Paper (in the box of the outdoor unit)

Installer and user reference guide:

▪ Preparation of the installation, technical specifications, reference data,…

▪ Detailed step-by-step instructions and background information for basic and advanced usage

▪ Format: Digital files on http://www.daikineurope.com/supportand-manuals/product-information/

Latest revisions of the supplied documentation may be available on the regional Daikin website or via your dealer.

The original documentation is written in English. All other languages are translations.

For the installer

2 About the box

2.1

Outdoor unit

2.1.1

To remove the accessories from the outdoor unit

1

Remove the service cover. See

"5.1.1  To open the outdoor unit" on page 8

.

2

Remove the accessories.

a

1× b

1× c

1× d

1× e

3 About the units and options

3.1

About the outdoor unit

This installation manual concerns the VRV IV-S, full inverter driven, heat pump system.

These units are intended for outdoor installation and aimed for air to air heat pump applications.

Capacity

Ambient design temperature

Specification

Heating

Cooling

Heating

Cooling

RXYSCQ4+5

14.2~16 kW

12.1~14 kW

–20~15.5°C WB

–5~46°C DB

3.2

System layout

NOTICE

Design of the system must not be done at temperatures below –15°C.

a a

General safety precautions

b

Outdoor unit installation and operation manual

c

Fluorinated greenhouse gases label

d

Installation information sticker

e

Cable tie

b c c

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

d d f e g f e g

Installation and operation manual

5

4 Preparation

a

VRV IV-S Heat pump outdoor unit

b

Refrigerant piping

c

VRV direct expansion (DX) indoor unit

d

User interface (dedicated depending on indoor unit type)

e

BP box (required to connect Residential Air (RA) or Sky Air

(SA) direct expansion (DX) indoor units)

f

Residential Air (RA) direct expansion (DX) indoor units

g

User interface (wireless, dedicated depending on indoor unit type)

4 Preparation

4.1

Preparing installation site

4.1.1

Installation site requirements of the outdoor unit

Mind the spacing guidelines. See the "Technical data" chapter, and the figures on the inside of the front cover.

4.1.2

Additional installation site requirements of the outdoor unit in cold climates

NOTICE

When operating the unit in heating in a low outdoor ambient temperature with high humidity conditions, make sure to take precautions to keep the drain holes of the unit free by using proper equipment.

In heating:

20

15.5

15

10

5

a b

0

–5

–10

–15

–20

10 15 20

T

AI

(°C DB)

25 27 30

a Warming up operation range

b Operation range

T

AI

Ambient indoor temperature

T

AO

Ambient outdoor temperature

If the unit is selected to operate at ambient temperatures lower than –5°C for 5 days or longer, with relative humidity levels exceeding 95%, we recommend to apply a Daikin range specifically designed for such application and/or to contact your dealer for further advice.

4.2

Preparing refrigerant piping

4.2.1

Refrigerant piping requirements

NOTICE

Refrigerant R410A requires strict cautions for keeping the system clean and dry. Foreign materials (including mineral oils or moisture) should be prevented from getting mixed into the system.

NOTICE

The piping and other pressure-containing parts shall be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant.

▪ Foreign materials inside pipes (including oils for fabrication) must be ≤30 mg/10 m.

4.2.2

Refrigerant piping material

Piping material: Phosphoric acid deoxidised seamless copper.

Piping temper grade and thickness:

Outer diameter

(Ø)

6.4 mm (1/4")

Temper grade

Annealed (O)

Thickness (t)

≥0.80 mm

(a)

9.5 mm (3/8")

Ø

12.7 mm (1/2")

15.9 mm (5/8") Annealed (O) ≥0.99 mm

(a) Depending on the applicable legislation and the unit's maximum working pressure (see "PS High" on the unit name plate), larger piping thickness might be required.

Flare connections: Only use annealed material.

t

4.2.3

To select the piping size

Determine the proper size referring to following tables and reference figure (only for indication).

INFORMATION

▪ Combination of VRV DX and RA DX indoor units is not allowed.

▪ Combination of RA  DX and AHU indoor units is not allowed.

▪ Combination of RA DX and aircurtain indoor units is not allowed.

INFORMATION

If you install RA  DX indoor units, you have to configure field setting [2‑38] (=  type of installed indoor units). See

"6.1.8 Mode 2: Field settings" on page 18 .

VRV DX RA DX

1 1

Installation and operation manual

6

2

B-1

2

2

B-2

A

4

D

4

D

2

A

C-1 C-2

3-1 3-2

C-3 C-4

3-3 3-4

1

Outdoor unit

2

Refrigerant branch kits

5

E

5

E

5

E

5

E

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

3-1~3-4

VRV DX indoor units

4

BP units

5

RA DX indoor units

A

Piping between outdoor unit and (first) refrigerant branch kit

B-1 B-2

Piping between refrigerant branch kits

C-1~C-4

Piping between refrigerant branch kit and indoor unit

D

Piping between refrigerant branch kit and BP unit

E

Piping between BP unit and RA DX indoor unit

In case the required pipe sizes (inch sizes) are not available, it is also allowed to use other diameters (mm sizes), taken the following into account:

▪ Select the pipe size nearest to the required size.

▪ Use the suitable adapters for the change-over from inch to  mm pipes (field supply).

▪ The additional refrigerant calculation has to be adjusted as mentioned in

"5.6.2  To determine the additional refrigerant amount" on page 12 .

A: Piping between outdoor unit and (first) refrigerant branch kit

When the equivalent pipe length between outdoor and indoor units is

90 m or more, the size of the main gas pipe must be increased (sizeup). If the recommended gas pipe (size-up) is not available, you must use the standard size (which might result in a small capacity decrease).

a b c e d

4+5

a

Outdoor unit

b

Main gas pipe

c

Increase

d

First refrigerant branch kit

e

Indoor unit

Outdoor unit capacity type (HP)

Piping outer diameter size (mm)

Gas pipe

Standard Size-up

15.9

19.1

Liquid pipe

9.5

B: Piping between refrigerant branch kits

Choose from the following table in accordance with the indoor unit total capacity type, connected downstream. Do not let the connection piping exceed the refrigerant piping size chosen by the general system model name.

Indoor unit capacity index

<150

150≤x≤162.5

Piping outer diameter size (mm)

Gas pipe

15.9

19.1

Liquid pipe

9.5

Example: Downstream capacity for B-1 = capacity index of unit 3-1

+ capacity index of unit 3-2

C: Piping between refrigerant branch kit and indoor unit

Use the same diameters as the connections (liquid, gas) on the indoor units. The diameters of the indoor units are as follows:

Indoor unit capacity index

15~50

63~140

Piping outer diameter size (mm)

Gas pipe

12.7

15.9

Liquid pipe

6.4

9.5

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

4 Preparation

D: Piping between refrigerant branch kit and BP unit

Total capacity index of connected indoor units

15~62

63~149

Piping outer diameter size (mm)

Gas pipe Liquid pipe

12.7

15.9

6.4

9.5

E: Piping between BP unit and RA DX indoor unit

Indoor unit capacity index

15~42

50

60

71

Piping outer diameter size (mm)

Gas pipe

9.5

12.7

Liquid pipe

6.4

9.5

15.9

4.2.4

To select refrigerant branch kits

For piping example, refer to

"4.2.3  To select the piping size"  on page 6 .

Refnet joint at first branch (counting from outdoor unit)

When using refnet joints at the first branch counted from the outdoor unit side, choose from the following table in accordance with the capacity of the outdoor unit. Example: Refnet joint A→B‑1.

Outdoor unit capacity type

(HP)

4+5

Refrigerant branch kit

KHRQ22M20T

Refnet joints at other branches

For refnet joints other than the first branch, select the proper branch kit model based on the total capacity index of all indoor units connected after the refrigerant branch. Example: Refnet joint

B‑1→C‑1.

Indoor unit capacity index

<162.5

Refrigerant branch kit

KHRQ22M20T

Refnet headers

Concerning refnet headers, choose from the following table in accordance with the total capacity of all the indoor units connected below the refnet header.

Indoor unit capacity index

<162.5

Refrigerant branch kit

KHRQ22M29H

INFORMATION

Maximum 8 branches can be connected to a header.

4.3

Preparing electrical wiring

4.3.1

Safety device requirements

The power supply must be protected with the required safety devices, i.e. a main switch, a slow blow fuse on each phase and an earth leakage protector in accordance with the applicable legislation.

Selection and sizing of the wiring should be done in accordance with the applicable legislation based on the information mentioned in the table below.

Model

RXYSCQ4+5

For all models:

Minimum circuit ampacity

29.1 A

Recommended fuses

32 A

Installation and operation manual

7

5 Installation

▪ Phase and frequency: 1~ 50 Hz

▪ Voltage: 220-240 V

▪ Transmission line section:

Transmission wiring Vinyl cords with 0.75 to

1.25 mm² sheath or cables

(2‑core wires)

300 m Maximum wiring length

(= distance between outdoor and furthest indoor unit)

Total wiring length 600 m

(= distance between outdoor and all indoors)

If the total transmission wiring exceeds these limits, it may result in communication error.

5 Installation

5.1

Opening the units

5.1.1

To open the outdoor unit

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING

4× M12

620

(mm)

a a

Make sure not to cover the drain holes.

INFORMATION

The recommended height of the upper protruding part of the bolts is 20 mm.

NOTICE

Fix the outdoor unit to the foundation bolts using nuts with resin washers (a). If the coating on the fastening area is stripped off, the nuts rust easily.

a

5.2.2

To install the outdoor unit

5.2

Mounting the outdoor unit

5.2.1

To provide the installation structure

Prepare 4 sets of anchor bolts, nuts and washers (field supply) as follows:

4× M12

Installation and operation manual

8

5.2.3

To provide drainage

▪ Make sure that condensation water can be evacuated properly.

▪ Install the unit on a base to make sure that there is a proper drainage in order to avoid ice accumulation.

▪ Prepare a water drainage channel around the foundation to drain waste water surrounding the unit.

▪ Avoid drain water flowing over the footpath, so that it does not become slippery in case of ambient freezing temperatures.

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

5 Installation

▪ If you install the unit on a frame, install a waterproof plate within

150  mm of the bottom side of the unit in order to prevent the invasion of water in the unit and to avoid the drain water dripping

(see the following illustration).

Result: The valve is now open.

NOTICE

If drain holes of the outdoor unit are covered by a mounting base or by floor surface, raise the unit to provide a free space of more than 150 mm under the outdoor unit.

1

4

2

Drain holes (dimensions in mm) a

3

To close the stop valve

1

Remove the stop valve cover.

2

Insert a hexagon wrench into the stop valve and turn the stop valve clockwise.

3

When the stop valve cannot be turned any further, stop turning.

Result: The valve is now closed.

Closing direction:

20

216 130

21

a

Drain holes

89

32

98

5.2.4

To prevent the outdoor unit from falling over

Connect cables (field supply) as shown.

To handle the stop valve cover

▪ The stop valve cover is sealed where indicated by the arrow. Take care not to damage it.

▪ After handling the stop valve, make sure to tighten the stop valve cover securely. For the tightening torque, refer to the table below.

▪ Check for refrigerant leaks after tightening the stop valve cover.

5.3

Connecting the refrigerant piping

DANGER: RISK OF BURNING

5.3.1

Using the stop valve and service port

To handle the stop valve

▪ Make sure to keep all stop valves open during operation.

▪ The stop valve is factory closed.

To open the stop valve

1

Remove the stop valve cover.

2

Insert a hexagon wrench into the stop valve and turn the stop valve counterclockwise.

3

When the stop valve cannot be turned any further, stop turning.

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

To handle the service port

▪ Always use a charge hose equipped with a valve depressor pin, since the service port is a Schrader type valve.

▪ After handling the service port, make sure to tighten the service port cover securely. For the tightening torque, refer to the table below.

▪ Check for refrigerant leaks after tightening the service port cover.

Tightening torques

Stop valve size (mm)

Ø9.5

Ø15.9

Tightening torque N•m (turn clockwise to close)

Shaft

Valve body Hexagonal wrench

5.4~6.6

4 mm

13.5~16.5

6 mm

Cap (valve lid)

Service port

13.5~16.5

11.5~13.9

22.5~27.5

Installation and operation manual

9

5 Installation

5.3.2

To connect the refrigerant piping to the outdoor unit

NOTICE

Be sure that the field installed piping does not touch other pipes, the bottom panel or side panel. Especially for the bottom and side connection, be sure to protect the piping with suitable insulation, to prevent it from coming into contact with the casing.

1

Do the following:

▪ Remove the service cover. See

"5.1.1  To open the outdoor unit" on page 8 .

▪ Remove the piping intake plate (a) with screw (b).

b a

2

Choose a piping route (a, b or c).

NOTICE

Make sure to open the stop valves after installing the refrigerant piping and performing vacuum drying. Running the system with the stop valves closed may break the compressor.

5.4

Checking the refrigerant piping

5.4.1

About checking the refrigerant piping

Refrigerant piping works are finished?

No

Finish piping work.

Yes

The indoor units and/or outdoor unit were already powered ON?

No

Use procedure:

"Method 1: Before power ON

(regular method)".

Yes

Use procedure:

"Method 2: After power ON".

Installation and operation manual

10

a

4× Ø6 mm c b

3

If you have chosen the downwards piping route:

▪ Drill (a, 4×) and remove the knockout hole (b).

▪ Cut out the slits (c) with a metal saw.

a

4

Do the following:

▪ Connect the liquid pipe (a) to the liquid stop valve.

▪ Connect the gas pipe (b) to the gas stop valve.

b a

5

Reattach the service cover and the piping intake plate.

6

Seal all gaps (example: a) to prevent snow and small animals from entering the system.

WARNING b a c c

Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire.

It is very important that all refrigerant piping work is done before the units (outdoor or indoor) are powered on.

When the units are powered on, the expansion valves will initialise.

This means that they will close. Leak test and vacuum drying of field piping and indoor units is impossible when this happens.

Therefore, there will be explained 2 methods for initial installation, leak test and vacuum drying.

Method 1: Before power ON

If the system has not yet been powered on, no special action is required to perform the leak test and the vacuum drying.

Method 2: After power ON

If the system has already been powered on, activate setting [2‑21]

(refer to

"6.1.4  To access mode 1 or 2"  on page  16 ). This setting

will open field expansion valves to guarantee a R410A piping pathway and make it possible to perform the leak test and the vacuum drying.

NOTICE

Make sure that all indoor units connected to the outdoor unit are powered on.

NOTICE

Wait until the outdoor unit has finished the initialisation to apply setting [2‑21].

Leak test and vacuum drying

Checking the refrigerant piping involves:

▪ Checking for any leakages in the refrigerant piping.

▪ Performing vacuum drying to remove all moisture, air or nitrogen in the refrigerant piping.

If there is a possibility of moisture being present in the refrigerant piping (for example, water may have entered the piping), first carry out the vacuum drying procedure below until all moisture has been removed.

All piping inside the unit has been factory tested for leaks.

Only field installed refrigerant piping needs to be checked.

Therefore, make sure that all the outdoor unit stop valves are firmly closed before performing leak test or vacuum drying.

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NOTICE

Make sure that all (field supplied) field piping valves are

OPEN (not outdoor unit stop valves!) before you start leak test and vacuuming.

For more information on the state of the valves, refer to

"5.4.3 Checking refrigerant piping: Setup" on page 11 .

5.4.2

Checking refrigerant piping: General guidelines

Connect the vacuum pump through a manifold to the service port of all stop valves to increase efficiency (refer to

"5.4.3  Checking refrigerant piping: Setup" on page 11

).

NOTICE

Use a 2-stage vacuum pump with a non-return valve or a solenoid valve that can evacuate to a gauge pressure of

–⁠100.7 kPa (5 Torr absolute).

NOTICE

Make sure the pump oil does not flow oppositely into the system while the pump is not working.

NOTICE

Do not purge the air with refrigerants. Use a vacuum pump to evacuate the installation.

5.4.3

Checking refrigerant piping: Setup

a

N2 b p< p>

A B g

C f d

R410A c e a

Pressure reducing valve

b

Nitrogen

c

Weighing scales

d

Refrigerant R410A tank (siphon system)

e

Vacuum pump

f

Liquid line stop valve

g

Gas line stop valve

A

Valve A

B

Valve B

C

Valve C

Valve

Valve A

Valve B

Valve C

Liquid line stop valve

Gas line stop valve

Open

Open

Open

Close

Close

State of valve

NOTICE

The connections to the indoor units and all indoor units should also be leak and vacuum tested. Keep any possible

(field supplied) field piping valves open as well.

Refer to the indoor unit installation manual for more details.

Leak test and vacuum drying should be done before the power supply is set to the unit. If not, see also the flow chart earlier described in this chapter (see

"5.4.1  About checking the refrigerant piping" on page 10 ).

5.4.4

To perform a leak test

The leak test must satisfy the specifications of EN378‑2.

5 Installation

To check for leaks: Vacuum leak test

1

Evacuate the system from the liquid and gas piping to

–⁠100.7 kPa (–⁠1.007 bar/5 Torr) for more than 2 hours.

2

Once reached, turn off the vacuum pump and check that the pressure does not rise for at least 1 minute.

3

Should the pressure rise, the system may either contain moisture (see vacuum drying below) or have leaks.

To check for leaks: Pressure leak test

1

Break the vacuum by pressurising with nitrogen gas to a minimum gauge pressure of 0.2  MPa (2  bar). Never set the gauge pressure higher than the maximum operation pressure of the unit, i.e. 4.0 MPa (40 bar).

2

Test for leaks by applying a bubble test solution to all piping connections.

3

Discharge all nitrogen gas.

NOTICE

Make sure to use a recommended bubble test solution from your wholesaler. Do not use soap water, which may cause cracking of flare nuts (soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold), and/or lead to corrosion of flared joints (soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare).

5.4.5

To perform vacuum drying

To remove all moisture from the system, proceed as follows:

1

Evacuate the system for at least 2 hours to a target vacuum of

–⁠100.7 kPa (–⁠1.007 bar/5 Torr).

2

Check that, with the vacuum pump turned off, the target vacuum is maintained for at least 1 hour.

3

Should you fail to reach the target vacuum within 2 hours or maintain the vacuum for 1 hour, the system may contain too much moisture. In that case, break the vacuum by pressurising with nitrogen gas to a gauge pressure of 0.05  MPa (0.5  bar) and repeat steps 1 to 3 until all moisture has been removed.

4

Depending on whether you want to immediately charge refrigerant through the refrigerant charge port or first pre-charge a portion of refrigerant through the liquid line, either open the outdoor unit stop valves, or keep them closed. See

"5.6.3  To charge refrigerant" on page 12

for more information.

5.5

To insulate the refrigerant piping

After finishing the leak test and vacuum drying, the piping must be insulated. Take into account the following points:

▪ Make sure to insulate the connection piping and refrigerant branch kits entirely.

▪ Be sure to insulate the liquid and gas piping (for all units).

▪ Use heat resistant polyethylene foam which can withstand a temperature of 70°C for liquid piping and polyethylene foam which can withstand a temperature of 120°C for gas piping.

▪ Reinforce the insulation on the refrigerant piping according to the installation environment.

Ambient temperature

≤30°C

>30°C

Humidity

75% to 80% RH

≥80% RH

Minimum thickness

15 mm

20 mm

Condensation might form on the surface of the insulation.

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5 Installation

▪ If there is a possibility that condensation on the stop valve might drip down into the indoor unit through gaps in the insulation and piping because the outdoor unit is located higher than the indoor unit, this must be prevented by sealing up the connections. See below figure.

b a a

Insulation material

b

Caulking etc.

5.6

Charging refrigerant

5.6.1

Precautions when charging refrigerant

WARNING

▪ Only use R410A as refrigerant. Other substances may cause explosions and accidents.

▪ R410A contains fluorinated greenhouse gases. Its global warming potential value is 2087.5. Do NOT vent these gases into the atmosphere.

▪ When charging refrigerant, always use protective gloves and safety glasses.

NOTICE

If the power of some units is turned off, the charging procedure cannot be finished properly.

NOTICE

Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor.

NOTICE

If operation is performed within 12 minutes after the indoor and outdoor units are turned on, the compressor will not operate before the communication is established in a correct way between outdoor unit(s) and indoor units.

NOTICE

Before starting charging procedures, check if the 7‑LEDs display is as normal (see

"6.1.4 To access mode 1 or 2" on page  16

), and there is no malfunction code on the user interface of the indoor unit. If a malfunction code is present, see

"8.1  Solving problems based on error codes" on page 21

.

NOTICE

Make sure all connected indoor units are recognised

(setting [1‑5]).

NOTICE

Close the front panel before any refrigerant charge operation is executed. Without the front panel attached the unit cannot judge correctly whether it is operating properly or not.

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12

NOTICE

In case of maintenance and the system (outdoor unit+field piping+indoor units) does not contain any refrigerant any more (e.g., after refrigerant reclaim operation), the unit has to be charged with its original amount of refrigerant (refer to the nameplate on the unit) and the determined additional refrigerant amount.

5.6.2

To determine the additional refrigerant amount

INFORMATION

For final charge adjustment in a test laboratory, contact your dealer.

Additional refrigerant to be charged=R (kg). R should be rounded off in units of 0.1 kg.

R=[(X

1

×Ø9.5)×0.059+(X

2

×Ø6.4)×0.022]

X

1...2

=Total length (m) of liquid piping size at Øa

INFORMATION

Piping length is considered the distance from the outdoor unit to the farthest indoor unit.

When using metric piping, please take into account following table concerning the weight factor to be allocated. It should be substituted in the formula for R.

Inch piping Metric piping

Size (Ø) (mm) Weight factor Size (Ø) (mm) Weight factor

6.4

0.022

6 0.018

9.5

0.059

10 0.065

5.6.3

To charge refrigerant

To speed up the refrigerant charging process, it is in case of larger systems recommended to first pre-charge a portion of refrigerant through the liquid line before proceeding with the manual charging. It can be skipped, but charging will take longer then.

Pre-charging refrigerant

Pre-charging can be done without compressor operation, by connecting the refrigerant bottle to the service port of the liquid stop valve.

1

Connect as shown. Make sure that all outdoor unit stop valves, as well as valve A are closed.

p< p> a

A B g

C f

N2 b d

R410A c e a

Pressure reducing valve

b

Nitrogen

c

Weighing scales

d

Refrigerant R410A tank (siphon system)

e

Vacuum pump

f

Liquid line stop valve

g

Gas line stop valve

A

Valve A

B

Valve B

C

Valve C

2

Open valves C and B.

3

Pre‑charge refrigerant until the determined additional refrigerant amount is reached or pre‑charging is not possible anymore, and then close valves C and B.

4

Do one of the following:

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If

The determined additional refrigerant amount is reached

Then

Disconnect the manifold from the liquid line.

Too much refrigerant is charged

The determined additional refrigerant amount is not

reached yet

You do not have to perform the

"Charging refrigerant (in manual additional refrigerant charge mode)" instructions.

Recover refrigerant.

Disconnect the manifold from the liquid line.

You do not have to perform the

"Charging refrigerant (in manual additional refrigerant charge mode)" instructions.

Disconnect the manifold from the liquid line.

Continue with the "Charging refrigerant (in manual additional refrigerant charge mode)" instructions.

Charging refrigerant (in manual additional refrigerant charge mode)

The remaining additional refrigerant charge can be charged by operating the outdoor unit by means of the manual additional refrigerant charge mode.

5

Connect as shown. Make sure valve A is closed.

p< p>

A d b

R410A a c a

Weighing scales

b

Refrigerant R410A tank (siphon system)

c

Vacuum pump

d

Refrigerant charge port

A

Valve A

d

NOTICE

The refrigerant charging port is connected to the piping inside the unit. The unit's internal piping is already factory charged with refrigerant, so be careful when connecting the charge hose.

6

Open all outdoor unit stop valves. At this point, valve A must remain closed!

7

Take all the precautions mentioned in

"6  Configuration"  on page 15

and "7 Commissioning" on page 20

into account.

8

Turn on the power of the indoor units and outdoor unit.

9

Activate setting [2‑20] to start the manual additional refrigerant charge mode. For details, see

"6.1.8 Mode 2: Field settings" on page 18

.

Result: The unit will start operation.

INFORMATION

The manual refrigerant charge operation will automatically stop within 30 minutes. If charging is not completed after

30 minutes, perform the additional refrigerant charging operation again.

5 Installation

INFORMATION

▪ When a malfunction is detected during the procedure

(e.g., in case of closed stop valve), a malfunction code will be displayed. In that case, refer to

"5.6.4  Error codes when charging refrigerant"  on page  13

and solve the malfunction accordingly. Resetting the malfunction can be done by pushing BS3. You can restart the "Charging" instructions.

▪ Aborting the manual refrigerant charge is possible by pushing BS3. The unit will stop and return to idle condition.

10 Open valve A.

11 Charge refrigerant until the remaining determined additional refrigerant amount is added, and then close valve A.

12 Press BS3 to stop the manual additional refrigerant charge mode.

NOTICE

Make sure to open all stop valves after (pre-) charging the refrigerant.

Operating with the stop valves closed will damage the compressor.

NOTICE

After adding the refrigerant, do not forget to close the lid of the refrigerant charging port. The tightening torque for the lid is 11.5 to 13.9 N•m.

5.6.4

Error codes when charging refrigerant

INFORMATION

If a malfunction occurs, the error code is displayed on the user interface of the indoor unit.

If a malfunction occurs, close valve A immediately. Confirm the malfunction code and take corresponding action,

"8.1  Solving problems based on error codes" on page 21 .

5.6.5

To fix the fluorinated greenhouse gases label

1

Fill in the label as follows:

a b c a

Factory refrigerant charge: see unit name plate

b

Additional refrigerant amount charged

c

Total refrigerant charge

2

Fix the label on the inside of the outdoor unit. There is a dedicated place for it on the wiring diagram label.

5.7

Connecting the electrical wiring

5.7.1

Field wiring: Overview

Field wiring consists of power supply (always including earth) and indoor-outdoor communication (= transmission) wiring.

Example:

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5 Installation

a d c b a b g g c h h f e h h f e h h f e a

Field power supply (with earth leakage protector)

b

Main switch

c

Earth connection

d

Outdoor unit

e

Indoor unit

f

User interface

g

Power supply wiring (sheathed cable) (230 V)

h

Transmission wiring (sheathed cable) (16 V)

Power supply 1~ 50 Hz

Earth wiring

5.7.2

Guidelines when knocking out knockout holes

NOTICE

Precautions when making knockout holes:

▪ Avoid damaging the casing.

▪ After making the knockout holes, we recommend you remove the burrs and paint the edges and areas around the edges using repair paint to prevent rusting.

▪ When passing electrical wiring through the knockout holes, wrap the wiring with protective tape to prevent damage.

X2M

TO IN/D TO OUT/D

F1 F2 F1 F2 F1 F2

a b

F1 F2 F1 F2 F1 F2

a

Use the conductor of sheathed wire (2 wire) (no polarity)

b

Terminal board (field supply)

WARNING

You must use shielded wire and connect the earth to the transmission terminal (X2M).

F1 F2 F1 F2 a b a

Knockout hole

b

Burr

c

Sealant etc.

c

5.7.3

Guidelines when connecting the electrical wiring

Tightening torques

Wiring Screw size

M5

Tightening torque

(N•m)

2.0~3.0

Power supply wiring

(power supply + shielded ground)

Transmission wiring M3.5

0.8~0.97

5.7.4

To connect the electrical wiring on the outdoor unit

NOTICE

▪ Follow the wiring diagram (delivered with the unit, located at the inside of the service cover).

▪ Make sure the electrical wiring does NOT obstruct proper reattachment of the service cover.

1

Remove the service cover.

2

Connect the transmission wiring as follows:

Installation and operation manual

14

TO IN/D UNIT TO OUT/D UNIT

a

a Earth

3

Connect the power supply as follows:

1~ 50 Hz

220-240 V

a b c

X1M a

Earth leakage circuit breaker

b

Fuse

c

Power supply cable

4

Fix the cables (power supply and transmission wiring) with cable ties.

a

L N

X1M

X2M b a a

Cable tie

b

Attachment plate

X1M

Power supply

X2M

Transmission wiring

5

Route the wiring through the frame and connect it to it.

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Routing through the frame

Connecting to the frame

a Power supply cable

b Transmission wiring cable

When cables are routed from the unit, a protection sleeve for the conduits (PG insertions) can be inserted at the knockout hole.

When you do not use a wire conduit, protect the wires with vinyl tubes to prevent the edge of the knockout hole from cutting the wires.

A B a b c d e

A Inside of the outdoor unit

B Outside of the outdoor unit

a Wire

b Bush

c Nut

d Frame

e Hose

6

Reattach the service cover.

7

Connect an earth leakage circuit breaker and fuse to the power supply line.

5.8

Finishing the outdoor unit installation

5.8.1

To finish the transmission wiring

After installing the transmission wires inside the unit, wrap them along with the on-site refrigerant pipes using finishing tape, as shown in figure below.

a c b e d

6

a

Liquid pipe

b

Gas pipe

c

Insulator

d

Transmission wiring (F1/F2)

e

Finishing tape

Configuration

INFORMATION

It is important that all information in this chapter is read sequentially by the installer and that the system is configured as applicable.

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6 Configuration

DANGER: RISK OF ELECTROCUTION

6.1

Making field settings

6.1.1

About making field settings

To configure the heat pump system, you must give input to the outdoor unit's main PCB (A1P). This involves the following field setting components:

▪ Push buttons to give input to the PCB

▪ A display to read feedback from the PCB

Field settings are defined by their mode, setting and value. Example:

[2‑8]=4.

PC configurator

For VRV IV-S heat pump system it is alternatively possible to make several commissioning field settings through a personal computer interface (for this, option EKPCCAB is required). The installer can prepare the configuration (off-site) on PC and afterwards upload the configuration to the system.

See also:

"6.1.9  To connect the PC configurator to the outdoor unit" on page 20

.

Mode 1 and 2

Mode 1

Mode

(monitoring settings)

Mode 2

(field settings)

Description

Mode 1 can be used to monitor the current situation of the outdoor unit. Some field setting contents can be monitored as well.

Mode 2 is used to change the field settings of the system. Consulting the current field setting value and changing the current field setting value is possible.

In general, normal operation can be resumed without special intervention after changing field settings.

Some field settings are used for special operation (e.g., 1 time operation, recovery/ vacuuming setting, manual adding refrigerant setting, etc.). In such a case, it is required to abort the special operation before normal operation can restart. It will be indicated in below explanations.

6.1.2

To access the field setting components

See

"5.1.1 To open the outdoor unit" on page 8 .

6.1.3

Field setting components

NOTICE

The DIP switch (DS1 on A1P) is not used. Do NOT change the factory setting.

The components to make field settings are as follows:

A1P

MODE

TEST:

HWL: IND

C/H SELECT

MASTER SLAVE

L.N.O.P. DEMAND MULTI

X1M

X2M

H1P H2P

BS1

H3P

BS2

H4P

BS3

H5P

BS4

H6P

BS5

H7P H8P

MODE SET RETURN TEST

BS1~BS5

Push buttons

H1P~H7P

7‑LEDs display

H8P

LED for indication during initialisation

ON ( ) OFF ( ) Flashing ( )

RESET

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15

6 Configuration

Push buttons

Use the push buttons to make the field settings. Operate the push buttons with an insulated stick (such as a closed ball-point pen) to avoid touching of live parts.

BS1

MODE: For changing the set mode

BS2

SET: For field setting

BS3

RETURN: For field setting

BS4

TEST: For test operation

BS5

RESET: For resetting the address when the wiring is changed or when an additional indoor unit is installed

7‑LEDs display

The display gives feedback about the field settings, which are defined as [Mode-Setting]=Value.

H1P

Shows the mode

H2P~H7P

Shows the settings and values, represented in binary code

Example:

[

H1P

+ + 8 + 4 + 2 + 1]

H1P H2P H3P H4P H5P H6P H7P

Description

Default situation

(H1P OFF)

Mode 1

(H1P flashing)

Mode 2

(H1P ON)

0 + 0 + 8 + 0 + 0 + 0

Setting 8

(in mode 2)

(H2P~H7P = binary 8)

0 + 0 + 0 + 4 + 0 + 0

Value 4

(in mode 2)

(H2P~H7P = binary 4)

6.1.4

To access mode 1 or 2

After the units are turned ON, the display goes to its default situation. From there, you can access mode 1 and mode 2.

Initialisation: default situation

NOTICE

Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor.

Turn on the power supply of the outdoor unit and all indoor units.

When the communication between indoor units and outdoor unit is established and normal, the display indication state will be as below

(default situation when shipped from factory).

a

10~12 min

If the default situation is not displayed after 10~12 minutes, check the malfunction code on the indoor unit user interface. Solve the malfunction code accordingly. First, check the communication wiring.

Switching between modes

Use BS1 to switch between the default situation, mode  1 and mode 2.

b a

BS1

BS1 c a

Default situation (H1P OFF)

b

Mode 1 (H1P flashing)

c

Mode 2 (H1P ON)

BS1

Press BS1.

BS1 [5 s]

Press BS1 for at least 5 s.

INFORMATION

If you get confused in the middle of the process, press BS1 to return to the default situation.

6.1.5

To use mode 1

In mode 1 (and in default situation) you can read out some information.

Example: 7‑LEDs display – Default situation

You can read out the status of low noise operation as follows:

# Action

1 Make sure the LEDs are showing the default situation.

Button/display

(H1P OFF)

2 Check the status of LED

H6P.

H6P OFF: Unit is currently not operating under low noise restrictions.

H6P ON: Unit is currently operating under low noise restrictions.

Example: 7‑LEDs display – Mode 1

You can read out setting [1‑5] (=  the total number of connected indoor units) as follows:

Button/display # Action

1 Start from the default situation.

2 Select mode 1.

BS1 [1×]

BS2 [X×]

3 Select setting 5.

("X×" depends on the setting that you want to select.)

4 Display the value of setting 5.

(there are 8 indoor units connected)

5 Quit mode 1.

(= binary 5)

BS3 [1×]

(= binary 8)

BS1 [1×]

b c a

Power ON

b

Default situation

c

LED indication when there is a malfunction

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6.1.6

To use mode 2

In mode 2 you can make field settings to configure the system.

Example: 7‑LEDs display – Mode 2

You can change the value of setting [2‑8] (=  T e

target temperature during cooling operation) to 4 (= 8°C) as follows:

# Action

1 Start from the default situation.

2 Select mode 2.

Button/display

BS1 [5 s]

BS2 [X×]

3 Select setting 8.

("X×" depends on the setting that you want to select.)

4 Select value 4 (= 8°C).

a: Display the current value.

b: Change to 4. ("X×" depends on the current value, and the value that you want to select.)

c: Enter the value in the system.

d: Confirm. The system starts operating according to the setting.

5 Quit mode 2.

(= binary 8)

a

BS3 [1×]

b

BS2 [X×]

c

BS3 [1×]

d

BS3 [1×]

BS1 [1×]

6.1.7

Mode 1 (and default situation): Monitoring settings

In mode 1 (and in default situation) you can read out some information.

7‑LEDs display – Default situation (H1P OFF)

You can read out the following information:

Value / Description

H6P Shows the status of low noise operation.

OFF

Unit is currently not operating under low noise restrictions.

ON

Unit is currently operating under low noise restrictions.

Low noise operation reduces the sound generated by the unit compared to nominal operating conditions.

Low noise operation can be set in mode 2. There are two methods to activate low noise operation of the outdoor unit system.

▪ The first method is to enable an automatic low noise operation during night time by field setting. The unit will operate at the selected low noise level during the selected time frames.

▪ The second method is to enable low noise operation based on an external input. For this operation an optional accessory is required.

6 Configuration

Value / Description

H7P Shows the status of power consumption limitation operation.

OFF

Unit is currently not operating under power consumption limitations.

ON

Unit is currently operating under power consumption limitation.

Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions.

Power consumption limitation can be set in mode 2. There are two methods to activate power consumption limitation of the outdoor unit system.

▪ The first method is to enable a forced power consumption limitation by field setting. The unit will always operate at the selected power consumption limitation.

▪ The second method is to enable power consumption limitation based on an external input. For this operation an optional accessory is required.

7‑LEDs display – Mode 1 (H1P flashing)

You can read out the following information:

Value / Description Setting

(

[1‑5]

Shows the total number of connected indoor units.

[1‑14]

Shows the latest malfunction code.

[1‑15]

Shows the 2nd last malfunction code.

[1‑16]

Shows the 3rd last malfunction code.

)

It can be convenient to check if the total number of indoor units which are installed match the total number of indoor units which are recognised by the system. In case there is a mismatch, it is advised to check the communication wiring path between outdoor and indoor units

(F1/F2 communication line).

When the latest malfunction codes were reset by accident on an indoor unit user interface, they can be checked again through this monitoring settings.

For the content or reason behind the malfunction code see

"8.1 Solving problems based on error codes" on page 21 , where

most relevant malfunction codes are explained. Detailed information about malfunction codes can be consulted in the service manual of this unit.

To obtain more detailed information about the malfunction code, press BS2 up to 3 times.

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6 Configuration

6.1.8

Mode 2: Field settings

In mode 2 you can make field settings to configure the system. The LEDs give a binary representation of the setting/value number.

Setting

(= binary)

[2‑8]

T e

target temperature during cooling operation.

Value

Description

6°C

Auto

(default)

[2‑9]

T c

target temperature during heating operation.

(default)

8°C

9°C

10°C

11°C

Auto

46°C

43°C

Deactivated.

[2‑12]

Enable the low noise function and/or power consumption limitation via external control adaptor (DTA104A61/62).

If the system needs to be running under low noise operation or under power consumption limitation conditions when an external signal is sent to the unit, this setting should be changed. This setting will only be effective when the optional external control adaptor (DTA104A61/62) is installed in the indoor unit.

[2‑18]

Fan high static pressure setting.

In order to increase the static pressure the outdoor unit fan is delivering, this setting should be activated. For details about this setting, see technical specifications.

[2‑20]

Manual additional refrigerant charge.

In order to add the additional refrigerant charge amount in a manual way (without automatic refrigerant charging functionality), following setting should be applied.

(default)

(default)

(default)

Activated.

Deactivated.

Activated.

Deactivated.

Activated.

To stop the manual additional refrigerant charge operation (when the required additional refrigerant amount is charged), push BS3. If this function was not aborted by pushing BS3, the unit will stop its operation after 30 minutes.

If 30 minutes was not sufficient to add the needed refrigerant amount, the function can be reactivated by changing the field setting again.

Deactivated.

[2‑21]

Refrigerant recovery/vacuuming mode.

In order to achieve a free pathway to reclaim refrigerant out of the system or to remove residual substances or to vacuum the system it is necessary to apply a setting which will open required valves in the refrigerant circuit so the reclaim of refrigerant or vacuuming process can be done properly.

[2‑22]

Automatic low noise setting and level during night time.

By changing this setting, you activate the automatic low noise operation function of the unit and define the level of operation.

Depending on the chosen level, the noise level will be lowered.

The start and stop moments for this function are defined under setting [2‑26] and [2‑27].

(default)

(default)

Activated.

To stop the refrigerant recovery/vacuuming mode, push BS1. If BS1 is not pushed, the system will remain in refrigerant recovery/ vacuuming mode.

Deactivated

Level 1

Level 2

Level 3

Level 3<Level 2<Level 1

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Setting

(= binary)

[2‑25]

Low noise operation level via the external control adaptor.

If the system needs to be running under low noise operation conditions when an external signal is sent to the unit, this setting defines the level of low noise that will be applied.

This setting will only be effective when the optional external control adaptor (DTA104A61/62) is installed and the setting [2‑12] was activated.

[2‑26]

Low noise operation start time.

This setting is used in conjunction with setting [2‑22].

[2‑27]

Low noise operation stop time.

This setting is used in conjunction with setting [2‑22].

[2‑30]

Power consumption limitation level (step 1) via the external control adaptor (DTA104A61/62).

If the system needs to be running under power consumption limitation conditions when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied for step 1. The level is according to the table.

[2‑31]

Power consumption limitation level (step 2) via the external control adaptor (DTA104A61/62).

If the system needs to be running under power consumption limitation conditions when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied for step 2. The level is according to the table.

[2‑32]

Forced, all time, power consumption limitation operation (no external control adaptor is required to perform power consumption limitation).

If the system always needs to be running under power consumption limitation conditions, this setting activates and defines the level power consumption limitation that will be applied continuously. The level is according to the table.

[2‑38]

Type of indoor units

After changing this setting, you have to power OFF the system, wait for 20 s, and then power ON again. If not, the setting will not be processed and malfunction codes might occur.

[2‑41]

Cooling comfort setting.

This setting is used in conjunction with setting [2‑8].

[2‑42]

Heating comfort setting.

This setting is used in conjunction with setting [2‑9].

(default)

(default)

(default)

(default)

(default)

(default)

(default)

(default)

(default)

6 Configuration

Value

Level 1

Level 2

Description

Level 3<Level 2<Level 1

Level 3

20h00

22h00

24h00

6h00

7h00

8h00

60%

70%

80%

30%

40%

50%

Function not active.

Follows [2‑30] setting.

Follows [2‑31] setting.

VRV DX indoor units installed

RA DX indoor units installed

Eco

Mild

Quick

Powerful

Eco

Mild

Quick

Powerful

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19

7 Commissioning

6.1.9

To connect the PC configurator to the outdoor unit

2

3

4

5

a b c (X41A)

A1P a

PC

b

Cable (EKPCCAB)

c (X41A)

Extension cable connected to X41A

A1P

Outdoor unit main PCB

7 Commissioning

After installation and once the field settings are defined, the installer is obliged to verify correct operation. Therefore a test run must be performed according to the procedures described below.

7.1

Precautions when commissioning

CAUTION

Do not perform the test operation while working on the indoor units.

When performing the test operation, not only the outdoor unit, but the connected indoor unit will operate as well.

Working on an indoor unit while performing a test operation is dangerous.

NOTICE

Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor.

During test operation, the outdoor unit and the indoor units will start up. Make sure that the preparations of all indoor units are finished

(field piping, electrical wiring, air purge, ...). See installation manual of the indoor units for details.

7.2

Checklist before commissioning

After the installation of the unit, first check the following items. Once all below checks are fulfilled, the unit must be closed, only then can the unit be powered up.

You read the complete installation and operation instructions, as described in the installer and user

reference guide.

Installation

Check that the unit is properly installed, to avoid abnormal noises and vibrations when starting up the unit.

Field wiring

Be sure that the field wiring has been carried out according to the instructions described in the chapter

"5.7  Connecting the electrical wiring"  on page  13 ,

according to the wiring diagrams and according to the applicable legislation.

Power supply voltage

Check the power supply voltage on the local supply panel.

The voltage must correspond to the voltage on the identification label of the unit.

Earth wiring

Be sure that the earth wires have been connected properly and that the earth terminals are tightened.

Insulation test of the main power circuit

Using a megatester for 500  V, check that the insulation resistance of 2  MΩ or more is attained by applying a voltage of 500 V DC between power terminals and earth.

Never use the megatester for the transmission wiring.

Fuses, circuit breakers, or protection devices

Check that the fuses, circuit breakers, or the locally installed protection devices are of the size and type specified in the chapter

"4.3.1  Safety device requirements" on page 7 . Be sure that neither a fuse nor a

protection device has been bypassed.

Internal wiring

Visually check the electrical component box and the inside of the unit on loose connections or damaged electrical components.

Pipe size and pipe insulation

Be sure that correct pipe sizes are installed and that the insulation work is properly executed.

Stop valves

Be sure that the stop valves are open on both liquid and gas side.

Damaged equipment

Check the inside of the unit on damaged components or squeezed pipes.

Refrigerant leak

Check the inside of the unit on refrigerant leakage. If there is a refrigerant leak, try to repair the leak. If the repair is unsuccessful, call your local dealer. Do not touch any refrigerant which has leaked out from refrigerant piping connections. This may result in frostbite.

Oil leak

Check the compressor for oil leakage. If there is an oil leak, try to repair the leak. If the repairing is unsuccessful, call your local dealer.

Air inlet/outlet

Check that the air inlet and outlet of the unit is not obstructed by paper sheets, cardboard, or any other material.

Additional refrigerant charge

The amount of refrigerant to be added to the unit shall be written on the included "Added refrigerant" plate and attached to the rear side of the front cover.

Installation date and field setting

Be sure to keep record of the installation date on the sticker on the rear of the front panel according to

EN60335‑2‑40 and keep record of the contents of the field setting(s).

7.3

Checklist during commissioning

To perform a test run.

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7.3.1

About test run

The procedure below describes the test operation of the complete system. This operation checks and judges following items:

▪ Check of wrong wiring (communication check with indoor units).

▪ Check of the stop valves opening.

▪ Judgement of piping length.

Make sure to carry out the system test operation after the first installation. Otherwise, the malfunction code will be displayed on the user interface and normal operation or individual indoor unit test run cannot be carried out.

Abnormalities on indoor units cannot be checked for each unit separately. After the test operation is finished, check the indoor units one by one by performing a normal operation using the user interface. Refer to the indoor unit installation manual for more details concerning the individual test run.

INFORMATION

▪ It may take 10 minutes to achieve a uniform refrigerant state before the compressor starts.

▪ During the test operation, the refrigerant running sound or the magnetic sound of a solenoid valve may become loud and the display indication may change. These are not malfunctions.

7.3.2

To perform a test run (7-LEDs display)

1

Make sure all field settings you want are set; see

"6.1  Making field settings" on page 15

.

2

Turn ON the power to the outdoor unit and the connected indoor units.

NOTICE

Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor.

3

Make sure the default (idle) situation is existing (H1P is OFF); see

"6.1.4 To access mode 1 or 2" on page 16

. Push BS4 for 5 seconds or more. The unit will start test operation.

Result: The test operation is automatically carried out, the outdoor unit H2P flashes and the indication "Test operation" and "Under centralised control" will display on the user interface of indoor units.

Steps during the automatic system test run procedure:

Step Description

Control before start up (pressure equalisation)

Cooling start up control

Cooling stable condition

Communication check

Stop valve check

Pipe length check

Pump down operation

Unit stop

8.1.1

Error codes: Overview

Main code Cause

▪ The stop valve of an outdoor unit is left closed.

▪ Refrigerant overcharge

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8 Troubleshooting

INFORMATION

During the test operation, it is not possible to stop the unit operation from a user interface. To abort the operation, press BS3. The unit will stop after ±30 seconds.

4

Check the test operation results on the outdoor unit 7‑LEDs display.

Completion

Normal completion

Abnormal completion

Description

Refer to "7.3.3 Correcting after abnormal completion of the test run" on page 21

to take actions for correcting the abnormality. When the test operation is fully completed, normal operation will be possible after 5 minutes.

7.3.3

Correcting after abnormal completion of the test run

The test operation is only completed if there is no malfunction code displayed. In case of a displayed malfunction code, perform correcting actions as explained in the malfunction code table. Carry out the test operation again and confirm that the abnormality is properly corrected.

INFORMATION

If a malfunction occurs, the error code is displayed on the user interface of the indoor unit.

INFORMATION

Refer to the installation manual of the indoor unit for other detailed malfunction codes related to indoor units.

7.3.4

Operating the unit

Once the unit is installed and test operation of outdoor unit and indoor units is finished, the operation of the system can start.

For operating the indoor unit, the user interface of the indoor unit should be switched ON. Refer to the indoor unit operation manual for more details.

8 Troubleshooting

8.1

Solving problems based on error codes

In case of a displayed malfunction code, perform correcting actions as explained in the malfunction code table.

After correcting the abnormality, press BS3 to reset the malfunction code and retry operation.

INFORMATION

If a malfunction occurs, the error code is displayed on the user interface of the indoor unit.

Solution

▪ Open the stop valve on both the gas and liquid side.

▪ Recalculate the required amount of refrigerant from the piping length and correct the refrigerant charge level by recovering any excessive refrigerant with a refrigerant recovery machine.

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21

9 Technical data

Main code Cause

▪ The stop valve of an outdoor unit is left closed.

▪ Insufficient refrigerant

Solution

▪ Open the stop valve on both the gas and liquid side.

▪ Check if the additional refrigerant charge has been finished correctly. Recalculate the required amount of refrigerant from the piping length and add an adequate amount of refrigerant.

Check connection on PCB or actuator.

Electronic expansion valve malfunction

(Y1E) - A1P (X21A)

(Y3E) - A1P (X22A)

▪ The stop valve of an outdoor unit is left closed.

▪ Insufficient refrigerant

Refrigerant overcharge

▪ Open the stop valve on both the gas and liquid side.

▪ Check if the additional refrigerant charge has been finished correctly. Recalculate the required amount of refrigerant from the piping length and add an adequate amount of refrigerant.

Recalculate the required amount of refrigerant from the piping length and correct the refrigerant charge level by recovering any excessive refrigerant with a refrigerant recovery machine.

Check connection on PCB or actuator.

Ambient temperature sensor malfunction (R1T) - A1P

(X11A)

Discharge temperature sensor malfunction (R2T): open circuit / short circuit - A1P (X12A)

Suction temperature sensor malfunction

(R3T) - A1P (X12A)

Check connection on PCB or actuator.

Check connection on PCB or actuator.

(R5T) - A1P (X12A)

Liquid temperature sensor (coil) malfunction (R4T) - A1P

(X12A)

Liquid temperature sensor (after subcool HE) malfunction

(R7T) - A1P (X13A)

Gas temperature sensor (after subcool HE) malfunction

(R6T) - A1P (X13A)

High pressure sensor malfunction (S1NPH): open circuit / short circuit - A1P (X17A)

Low pressure sensor malfunction (S1NPL): open circuit / short circuit - A1P (X18A)

Transmission outdoor unit - inverter: INV1 / FAN1 transmission trouble

INV1 unbalanced power supply voltage

Insufficient supply voltage

Malfunction code: System test run not yet executed (system operation not possible)

No power is supplied to the outdoor unit.

Faulty wiring to Q1/Q2

System mismatch. Wrong type of indoor units combined

(R410A, R407C, RA, etc)

Check connection on PCB or actuator.

Check connection on PCB or actuator.

Check connection on PCB or actuator.

Check connection on PCB or actuator.

Check connection on PCB or actuator.

Check connection.

Check if power supply is within range.

Check if the supply voltage is supplied properly.

Execute system test run.

Check if the power wiring for the outdoor unit is connected correctly.

Check Q1/Q2 wiring.

Check if other indoor units have malfunction and confirm indoor unit mix is allowed.

Indoor unit malfunction

Improper type of indoor units are connected.

Incorrect interconnections between units.

Check the type of indoor units that are currently connected.

If they are not proper, replace them with proper ones.

Connect interconnections F1 and F2 of the connected BP unit correctly to the outdoor unit's PCB (TO BP UNIT). Make sure that the communication with the BP unit is enabled.

▪ Open the stop valve on both the gas and liquid side.

▪ The stop valve of an outdoor unit is left closed.

▪ The piping and wiring of the specified indoor unit are not connected correctly to the outdoor unit.

▪ Confirm that the piping and wiring of the specified indoor unit are connected correctly to the outdoor unit.

9 Technical data

Latest information can be found in the technical engineering data.

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9 Technical data

9.1

Service space: Outdoor unit

When mounting units side by side, the piping route must be to the front or downwards. In this case the piping route to the side is not possible.

Single unit ( ) | Single row of units ( )

See figure 1 on the inside of the front cover.

A,B,C,D

Obstacles (walls/baffle plates)

E

Obstacle (roof)

a,b,c,d,e

Minimum service space between the unit and obstacles A, B, C, D and E

e

B e

D

Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle B

Maximum distance between the unit and the edge of obstacle E, in the direction of obstacle D

H

U

H

B

,H

D

Height of the unit

Height of obstacles B and D

1

Seal the bottom of the installation frame to prevent discharged air from flowing back to the suction side through the bottom of the unit.

2

Maximum two units can be installed.

Not allowed

Multiple rows of units ( )

See figure 2 on the inside of the front cover.

Stacked units (max. 2 levels) ( )

See figure 3 on the inside of the front cover.

A1=>A2

(A1) If there is danger of drainage dripping and freezing between the upper and lower units…

(A2) Then install a roof between the upper and lower units. Install the upper unit high enough above the lower unit to prevent ice buildup at the upper unit's bottom plate.

B1=>B2

(B1) If there is no danger of drainage dripping and freezing between the upper and lower units…

(B2) Then it is not required to install a roof, but seal the gap between the upper and lower units to prevent discharged air from flowing back to the suction side through the bottom of the unit.

9.2

Piping diagram: Outdoor unit

d

Y1E

c e

R6T

Y3E

f g

R1T

R3T

Y1S

c

R7T

b a a

Stop valve (gas)

b

Stop valve (liquid)

c

Filter (3×)

d

Subcool heat exchanger

e

Heat sink PCB

f

Pressure regulating valve

g

Heat exchanger

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VRV IV-S system air conditioner

4P399985-1C – 2015.09

n l c m

M1F

R4T

R5T

S1NPL

R2T

i j

S1NPH

S1PH

k h

INV

M1C

h

Service port (high pressure)

i

Muffler

j

Check valve

k

Compressor accumulator

l

Capillary tube

m

Service port (refrigerant charge)

n

Accumulator

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23

9 Technical data

M1C

Compressor

M1F

Fan motor

R1T

Thermistor (air)

R2T

Thermistor (discharge)

R3T

Thermistor (suction 1)

R4T

Thermistor (heat exchanger de-icer)

R5T

Thermistor (suction 2)

R6T

Thermistor (subcool heat exchanger)

R7T

Thermistor (liquid pipe)

9.3

Wiring diagram: Outdoor unit

The wiring diagram is delivered with the unit, located at the inside of the service cover.

Notes for RXYSCQ4+5:

1 This wiring diagram applies only to the outdoor unit.

2 Symbols (see below).

3 Refer to the installation manual for how to use the BS1~BS5 and DS1+DS2 switches.

4 When operating, do not short-circuit protective device S1PH.

5 Colours (see below).

6 Refer to the installation manual for connection wiring to

INDOOR-OUTDOOR transmission F1-F2.

7 When using the central control system, connect OUTDOOR-

OUTDOOR transmission F1-F2.

Symbols:

L

N

Live

Neutral

Field wiring

Terminal strip

Connector

Fixed connector

Movable connector

Protective earth (screw)

Noiseless earth

Terminal

Colours:

BLK

BLU

BRN

GRN

ORG

RED

WHT

YLW

Black

Blue

Brown

Green

Orange

Red

White

Yellow

Legend for wiring diagram RXYSCQ4+5:

A1P

A2P

Printed circuit board (main)

Printed circuit board

BS1~BS5 Push button switch

C1 Capacitor

DS1 DIP switch

S1NPH

High pressure sensor

S1NPL

Low pressure sensor

S1PH

High pressure switch

Y1E

Electronic expansion valve (main)

Y3E

Electronic expansion valve (subcool heat exchanger)

Y1S

Solenoid valve (4‑way valve)

Heating

Cooling

E1HC

F1U

Crankcase heater

Fuse

F3U, F4U Fuse (T 6.3 A / 250 V)

F6U Fuse (T 5.0 A / 250 V)

H1P~H8P Light‑emitting diode (service monitor orange)

H2P:

▪ Prepare, test: Flickering

R3T

R4T

R5T

R6T

R7T

FINTH

S1NPH

S1NPL

HAP

HBP

K11M

K1R

K4R

K10R

▪ Malfunction detection: Light up

Light-emitting diode (service monitor is green)

Light-emitting diode (service monitor is green)

Magnetic contactor

Magnetic relay (Y1S)

Magnetic relay (E1HC)

Magnetic relay

L1R~L3R Reactor

M1C

M1F

Motor (compressor)

Motor (fan)

PS

R1, R2

R1T

R2T

Switching power supply

Resistor

Thermistor (air)

Thermistor (discharge)

Thermistor (suction 1)

Thermistor (heat exchanger de-icer)

Thermistor (suction 2)

Thermistor (subcool heat exchanger)

Thermistor (liquid pipe)

Thermistor (fin)

High pressure sensor

Low pressure sensor

S1PH

V1R

High pressure switch

IGBT power module

V2R Diode module

V1T~V3T Insulated gate bipolar transistor (IGBT)

V1D~V3D Diode

X1M, X2M Terminal strip

X37A

Y1E

Connector

Electronic expansion valve (main)

Y3E

Y1S

Electronic expansion valve (subcool heat exchanger)

Solenoid valve (4‑way valve)

Z1C~Z7C Noise filter (ferrite core)

Z1F~Z5F Noise filter

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10 About the system

For the user

b

10 About the system

The indoor unit part of VRV IV-S heat pump system can be used for heating/cooling applications. The type of indoor unit which can be used depends on the outdoor units series.

NOTICE

Do not use the air conditioner for other purposes. In order to avoid any quality deterioration, do not use the unit for cooling precision instruments, food, plants, animals or works of art.

NOTICE

For future modifications or expansions of your system:

A full overview of allowable combinations (for future system extensions) is available in technical engineering data and should be consulted. Contact your installer to receive more information and professional advice.

INFORMATION

▪ Combination of VRV DX and RA DX indoor units is not allowed.

▪ Combination of RA  DX and AHU indoor units is not allowed.

▪ Combination of RA DX and aircurtain indoor units is not allowed.

10.1

System layout

a

11

c c f e f e d d g g a

VRV IV-S Heat pump outdoor unit

b

Refrigerant piping

c

VRV direct expansion (DX) indoor unit

d

User interface (dedicated depending on indoor unit type)

e

BP box (required to connect Residential Air (RA) or Sky Air

(SA) direct expansion (DX) indoor units)

f

Residential Air (RA) direct expansion (DX) indoor units

g

User interface (wireless, dedicated depending on indoor unit type)

User interface

CAUTION

Never touch the internal parts of the controller.

Do not remove the front panel. Some parts inside are dangerous to touch and appliance problems may happen.

For checking and adjusting the internal parts, contact your dealer.

This operation manual will give a non-exhaustive overview of the main functions of the system.

Detailed information on required actions to achieve certain functions can be found in the dedicated installation and operation manual of the indoor unit.

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

Refer to the operation manual of the installed user interface.

12 Operation

12.1

Operation range

Use the system in the following temperature and humidity ranges for safe and effective operation.

Outdoor temperature

Cooling

–5~46°C DB

Heating

–20~21°C DB

Indoor temperature

21~32°C DB

–20~15.5°C WB

15~27°C DB

Indoor humidity

14~25°C WB

≤80%

(a)

(a) To avoid condensation and water dripping out of the unit. If the temperature or the humidity is beyond these conditions, safety devices may be put in action and the air conditioner may not operate.

Above operation range is only valid in case direct expansion indoor units are connected to the VRV IV-S system.

Special operation ranges are valid in case of using AHU. They can be found in the installation/operation manual of the dedicated unit.

Latest information can be found in the technical engineering data.

12.2

Operating the system

12.2.1

About operating the system

▪ Operation procedure varies according to the combination of outdoor unit and user interface.

▪ To protect the unit, turn on the main power switch 6 hours before operation.

▪ If the main power supply is turned off during operation, operation will restart automatically after the power turns back on again.

12.2.2

About cooling, heating, fan only, and automatic operation

▪ Changeover cannot be made with a user interface whose display shows "change-over under centralised control" (refer to installation and operation manual of the user interface).

▪ When the display "change-over under centralised control" flashes, refer to

"12.5.1  About setting the master user interface" on page 26 .

▪ The fan may keep on running for about 1 minute after the heating operation stops.

▪ The air flow rate may adjust itself depending on the room temperature or the fan may stop immediately. This is not a malfunction.

12.2.3

About the heating operation

It may take longer to reach the set temperature for general heating operation than for cooling operation.

The following operation is performed in order to prevent the heating capacity from dropping or cold air from blowing.

Installation and operation manual

25

12 Operation

Defrost operation

In heating operation, freezing of the outdoor unit's air cooled coil increases over time, restricting the energy transfer to the outdoor unit's coil. Heating capability decreases and the system needs to go into defrost operation to be able to deliver enough heat to the indoor units:

The indoor unit will stop fan operation, the refrigerant cycle will reverse and energy from inside the building will be used to defrost the outdoor unit coil.

The indoor unit will indicate defrost operation on the displays

.

Hot start

In order to prevent cold air from blowing out of an indoor unit at the start of heating operation, the indoor fan is automatically stopped.

The display of the user interface shows . It may take some time before the fan starts. This is not a malfunction.

12.2.4

To operate the system

1

Press the operation mode selector button on the user interface several times and select the operation mode of your choice.

Cooling operation

Heating operation

Fan only operation

2

Press the ON/OFF button on the user interface.

Result: The operation lamp lights up and the system starts operating.

12.3

Using the dry program

12.3.1

About the dry program

▪ The function of this program is to decrease the humidity in your room with minimal temperature decrease (minimal room cooling).

▪ The micro computer automatically determines temperature and fan speed (cannot be set by the user interface).

▪ The system does not go into operation if the room temperature is low (<20°C).

12.3.2

To use the dry program

To start

1

Press the operation mode selector button on the user interface several times and select (program dry operation).

2

Press the ON/OFF button of the user interface.

Result: The operation lamp lights up and the system starts operating.

3

Press the air flow direction adjust button (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted). Refer to

"12.4 Adjusting the air flow direction" on page 26 for details.

To stop

4

Press the ON/OFF button on the user interface once again.

Result: The operation lamp goes out and the system stops operating.

NOTICE

Do not turn off power immediately after the unit stops, but wait for at least 5 minutes.

12.4

Adjusting the air flow direction

Refer to the operation manual of the user interface.

Installation and operation manual

26

12.4.1

About the air flow flap

Double flow+multi-flow units

Corner units

Ceiling suspended units

Wall-mounted units

For the following conditions, a micro computer controls the air flow direction which may be different from the display.

Cooling Heating

▪ When the room temperature is lower than the set temperature.

▪ When starting operation.

▪ When the room temperature is higher than the set temperature.

▪ At defrost operation.

▪ When operating continuously at horizontal air flow direction.

▪ When continuous operation with downward air flow is performed at the time of cooling with a ceiling-suspended or a wall-mounted unit, the micro computer may control the flow direction, and then the user interface indication will also change.

The air flow direction can be adjusted in one of the following ways:

▪ The air flow flap itself adjusts its position.

▪ The air flow direction can be fixed by the user.

▪ Automatic and desired position .

WARNING

Never touch the air outlet or the horizontal blades while the swing flap is in operation. Fingers may become caught or the unit may break down.

NOTICE

▪ The movable limit of the flap is changeable. Contact your dealer for details. (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted).

▪ Avoid operating in the horizontal direction cause dew or dust to settle on the ceiling or flap.

. It may

12.5

Setting the master user interface

12.5.1

About setting the master user interface

a b c c f e f e d d g g a

VRV IV-S Heat pump outdoor unit

b

Refrigerant piping

c

VRV direct expansion (DX) indoor unit

d

User interface (dedicated depending on indoor unit type)

e

BP box (required to connect Residential Air (RA) or Sky Air

(SA) direct expansion (DX) indoor units)

f

Residential Air (RA) direct expansion (DX) indoor units

g

User interface (wireless, dedicated depending on indoor unit type)

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

When the system is installed as shown in the figure above, it is necessary to designate one of the user interfaces as the master user interface.

The displays of slave user interfaces show (change-over under centralised control) and slave user interfaces automatically follow the operation mode directed by the master user interface.

Only the master user interface can select heating or cooling mode.

12.5.2

To designate the master user interface

(VRV DX)

In case only VRV  DX indoor units are connected to the VRV IV-S system:

1

Press the operation mode selector button of the current master user interface for 4 seconds. In case this procedure was not yet performed, the procedure can be executed on the first user interface operated.

Result: The display showing (change-over under centralised control) of all slave user interfaces connected to the same outdoor unit flashes.

2

Press the operation mode selector button of the controller that you wish to designate as the master user interface.

Result: Designation is completed. This user interface is designated as the master user interface and the display showing (change-over under centralised control) vanishes. The displays of other user interfaces show

(change-over under centralised control).

12.5.3

To designate the master user interface

(RA DX)

In case only RA  DX indoor units are connected to the VRV IV-S system:

1

Stop all indoor units.

2

When the system is not operating (all indoor units thermo OFF), you can define the master RA DX indoor unit by addressing that unit with infrared user interface (instruct thermo ON in desired mode).

The only way to change the master unit is by repeating the previous procedure. A cool/heat switchover (or opposite) is only possible by changing the operation mode of the defined master indoor unit.

13 Maintenance and service

NOTICE

Do not wipe the controller operation panel with benzine, thinner, chemical dust cloth, etc. The panel may get discoloured or the coating peeled off. If it is heavily dirty, soak a cloth in water-diluted neutral detergent, squeeze it well and wipe the panel clean. Wipe it with another dry cloth.

13.1

After-sales service and warranty

13.1.1

Warranty period

▪ This product includes a warranty card that was filled in by the dealer at the time of installation. The completed card has to be checked by the customer and stored carefully.

▪ If repairs to the air conditioner are necessary within the warranty period, contact your dealer and keep the warranty card at hand.

13.1.2

Recommended maintenance and inspection

Since dust collects when using the unit for several years, performance of the unit will deteriorate to some extent. As taking apart and cleaning interiors of units requires technical expertise and in order to ensure the best possible maintenance of your units, we recommend to enter into a maintenance and inspection contract on top of normal maintenance activities. Our network of dealers has access to a permanent stock of essential components in order to keep your air conditioner in operation as long as possible. Contact your dealer for more information.

When asking your dealer for an intervention, always state:

▪ The complete model name of the air conditioner.

▪ The manufacturing number (stated on the nameplate of the unit).

▪ The installation date.

▪ The symptoms or malfunction, and details of the defect.

WARNING

▪ Do not modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an electric shock or fire. Contact your dealer.

▪ In case of accidental refrigerant leaks, make sure there are no naked flames. The refrigerant itself is entirely safe, non-toxic and non-combustible, but it will generate toxic gas when it accidentally leaks into a room where combustible air from fan heaters, gas cookers, etc. is present. Always have qualified service personnel confirm that the point of leakage has been repaired or corrected before resuming operation.

13 Maintenance and service

NOTICE

Never inspect or service the unit by yourself. Ask a qualified service person to perform this work.

WARNING

Never replace a fuse with a fuse of a wrong ampere ratings or other wires when a fuse blows out. Use of wire or copper wire may cause the unit to break down or cause a fire.

CAUTION

Do not insert fingers, rods or other objects into the air inlet or outlet. Do not remove the fan guard. When the fan is rotating at high speed, it will cause injury.

CAUTION

After a long use, check the unit stand and fitting for damage. If damaged, the unit may fall and result in injury.

14 Troubleshooting

If one of the following malfunctions occur, take the measures shown below and contact your dealer.

WARNING

Stop operation and shut off the power if anything unusual occurs (burning smells etc.).

Leaving the unit running under such circumstances may cause breakage, electric shock or fire. Contact your dealer.

The system must be repaired by a qualified service person:

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

Installation and operation manual

27

14 Troubleshooting

Malfunction

If a safety device such as a fuse, a breaker or an earth leakage breaker frequently actuates or the ON/OFF switch does not properly work.

Turn off the main power switch.

Measure

If water leaks from the unit.

The operation switch does not work well.

Stop the operation.

Turn off the power.

If the user interface display indicates the unit number, the operation lamp flashes and the malfunction code appears.

Notify your installer and report the malfunction code.

If the system does not properly operate except for the above mentioned cases and none of the above mentioned malfunctions is evident, investigate the system according to the following procedures.

Malfunction

If the system does not operate at all.

Measure

▪ Check if there is no power failure. Wait until power is restored. If power failure occurs during operation, the system automatically restarts immediately after the power supply is recovered.

▪ Check if no fuse has blown or breaker has worked. Change the fuse or reset the breaker if necessary.

If the system goes into fan only operation, but as soon as it goes into heating or cooling operation, the system stops.

▪ Check if air inlet or outlet of outdoor or indoor unit is not blocked by obstacles.

Remove any obstacle and make it wellventilated.

▪ Check if the user interface display shows

(time to clean the air filter). (Refer to

"13  Maintenance and service"  on page 27

and "Maintenance" in the indoor unit manual.)

The system operates but cooling or heating is insufficient.

▪ Check if air inlet or outlet of outdoor or indoor unit is not blocked by obstacles.

Remove any obstacle and make it wellventilated.

▪ Check if the air filter is not clogged (refer to "Maintenance" in the indoor unit manual).

▪ Check the temperature setting.

▪ Check the fan speed setting on your user interface.

▪ Check for open doors or windows. Shut doors and windows to prevent wind from coming in.

▪ Check if there are too many occupants in the room during cooling operation. Check if the heat source of the room is excessive.

▪ Check if direct sunlight enters the room.

Use curtains or blinds.

▪ Check if the air flow angle is proper.

If after checking all above items, it is impossible to fix the problem yourself, contact your installer and state the symptoms, the complete model name of the air conditioner (with manufacturing number if possible) and the installation date (possibly listed on the warranty card).

Installation and operation manual

28

14.1

Error codes: Overview

In case a malfunction code appears on the indoor unit user interface display, contact your installer and inform the malfunction code, the unit type, and serial number (you can find this information on the nameplate of the unit).

For your reference, a list with malfunction codes is provided. You can, depending on the level of the malfunction code, reset the code by pushing the ON/OFF button. If not, ask your installer for advice.

Main code Contents

External protection device was activated

EEPROM failure (indoor)

Drain system malfunction (indoor)

Fan motor malfunction (indoor)

Swing flap motor malfunction (indoor)

Expansion valve malfunction (indoor)

Drain malfunction (indoor unit)

Filter dust chamber malfunction (indoor)

Capacity setting malfunction (indoor)

Transmission malfunction between main PCB and sub

PCB (indoor)

Heat exchanger thermistor malfunction (indoor; liquid)

Heat exchanger thermistor malfunction (indoor; gas)

Suction air thermistor malfunction (indoor)

Discharge air thermistor malfunction (indoor)

Movement detector or floor temperature sensor malfunction (indoor)

User interface thermistor malfunction (indoor)

PCB malfunction (outdoor)

High pressure switch was activated

Low pressure malfunction (outdoor)

Compressor lock detection (outdoor)

Fan motor malfunction (outdoor)

Electronic expansion valve malfunction (outdoor)

Discharge temperature malfunction (outdoor)

Abnormal suction temperature (outdoor)

Refrigerant overcharge detection

High pressure switch malfunction

Low pressure switch malfunction

Fan motor trouble (outdoor)

Ambient temperature sensor malfunction (outdoor)

Pressure sensor malfunction

Current sensor malfunction

Discharge temperature sensor malfunction (outdoor)

Heat exchanger gas temperature sensor malfunction

(outdoor)

Suction temperature sensor malfunction (outdoor)

De-icing temperature sensor malfunction (outdoor)

Liquid temperature sensor (after subcool HE) malfunction (outdoor)

Gas temperature sensor (after subcool HE) malfunction (outdoor)

High pressure sensor malfunction (S1NPH)

Low pressure sensor malfunction (S1NPL)

INV PCB abnormal

Fin temperature abnormal

Inverter PCB faulty

Compressor over current detected

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

Main code Contents

Compressor lock (startup)

Transmission outdoor unit - inverter: INV transmission trouble

INV unbalanced power supply voltage

Fin thermistor malfunction

Capacity setting malfunction (outdoor)

Abnormal low pressure drop, faulty expansion valve

INV voltage power shortage

System test run not yet executed

Faulty wiring indoor/outdoor

Abnormal user interface - indoor communication

Faulty wiring to outdoor/outdoor

Abnormal main-sub user interface communication

System mismatch. Wrong type of indoor units combined. Indoor unit malfunction.

Connection malfunction over indoor units or type mismatch

Centralised address duplication

Malfunction in communication centralised control device - indoor unit

Auto address malfunction (inconsistency)

Auto address malfunction (inconsistency)

14.2

Symptoms that are not air conditioner troubles

Following symptoms are not air conditioner troubles:

14.2.1

Symptom: The system does not operate

▪ The air conditioner does not start immediately after the ON/OFF button on the user interface is pressed. If the operation lamp lights, the system is in normal condition. To prevent overloading of the compressor motor, the air conditioner starts 5 minutes after it is turned ON again in case it was turned OFF just before. The same starting delay occurs after the operation mode selector button was used.

▪ If "Under Centralized Control" is displayed on the user interface, pressing the operation button causes the display to blink for a few seconds. The blinking display indicates that the user interface cannot be used.

▪ The system does not start immediately after the power supply is turned on. Wait one minute until the micro computer is prepared for operation.

14.2.2

Symptom: Fan operation is possible, but cooling and heating do not work

Immediately after the power is turned on. The micro computer is getting ready to operate and is performing a communication check with all indoor units. Please wait 12 minutes (max.) till this process is finished.

14.2.3

Symptom: The fan strength does not correspond to the setting

The fan speed does not change even if the fan speed adjustment button in pressed. During heating operation, when the room temperature reaches the set temperature, the outdoor unit goes off and the indoor unit changes to whisper fan speed. This is to prevent cold air blowing directly on occupants of the room. The fan speed will not change even when another indoor unit is in heating operation, if the button is pressed.

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

14 Troubleshooting

14.2.4

Symptom: The fan direction does not correspond to the setting

The fan direction does not correspond with the user interface display. The fan direction does not swing. This is because the unit is being controlled by the micro computer.

14.2.5

Symptom: White mist comes out of a unit

(Indoor unit)

▪ When humidity is high during cooling operation. If the interior of an indoor unit is extremely contaminated, the temperature distribution inside a room becomes uneven. It is necessary to clean the interior of the indoor unit. Ask your dealer for details on cleaning the unit. This operation requires a qualified service person.

▪ Immediately after the cooling operation stops and if the room temperature and humidity are low. This is because warm refrigerant gas flows back into the indoor unit and generates steam.

14.2.6

Symptom: White mist comes out of a unit

(Indoor unit, outdoor unit)

When the system is changed over to heating operation after defrost operation. Moisture generated by defrost becomes steam and is exhausted.

14.2.7

Symptom: The user interface display reads "U4" or "U5" and stops, but then restarts after a few minutes

This is because the user interface is intercepting noise from electric appliances other than the air conditioner. The noise prevents communication between the units, causing them to stop. Operation automatically restarts when the noise ceases.

14.2.8

Symptom: Noise of air conditioners

(Indoor unit)

▪ A "zeen" sound is heard immediately after the power supply is turned on. The electronic expansion valve inside an indoor unit starts working and makes the noise. Its volume will reduce in about one minute.

▪ A continuous low "shah" sound is heard when the system is in cooling operation or at a stop. When the drain pump (optional accessories) is in operation, this noise is heard.

▪ A "pishi-pishi" squeaking sound is heard when the system stops after heating operation. Expansion and contraction of plastic parts caused by temperature change make this noise.

▪ A low "sah", "choro-choro" sound is heard while the indoor unit is stopped. When another indoor unit is in operation, this noise is heard. In order to prevent oil and refrigerant from remaining in the system, a small amount of refrigerant is kept flowing.

14.2.9

Symptom: Noise of air conditioners

(Indoor unit, outdoor unit)

▪ A continuous low hissing sound is heard when the system is in cooling or defrost operation. This is the sound of refrigerant gas flowing through both indoor and outdoor units.

▪ A hissing sound which is heard at the start or immediately after stopping operation or defrost operation. This is the noise of refrigerant caused by flow stop or flow change.

14.2.10 Symptom: Noise of air conditioners

(Outdoor unit)

When the tone of operating noise changes. This noise is caused by the change of frequency.

Installation and operation manual

29

15 Relocation

14.2.11 Symptom: Dust comes out of the unit

When the unit is used for the first time in a long time. This is because dust has gotten into the unit.

14.2.12 Symptom: The units can give off odours

The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it again.

14.2.13 Symptom: The outdoor unit fan does not spin

During operation. The speed of the fan is controlled in order to optimise product operation.

14.2.14 Symptom: The display shows "88"

This is the case immediately after the main power supply switch is turned on and means that the user interface is in normal condition.

This continues for one minute.

14.2.15 Symptom: The compressor in the outdoor unit does not stop after a short heating operation

This is to prevent refrigerant from remaining in the compressor. The unit will stop after 5 to 10 minutes.

14.2.16 Symptom: The inside of an outdoor unit is warm even when the unit has stopped

This is because the crankcase heater is warming the compressor so that the compressor can start smoothly.

14.2.17 Symptom: Hot air can be felt when the indoor unit is stopped

Several different indoor units are being run on the same system.

When another unit is running, some refrigerant will still flow through the unit.

15 Relocation

Contact your dealer for removing and reinstalling the total unit.

Moving units requires technical expertise.

16 Disposal

This unit uses hydrofluorocarbon. Contact your dealer when discarding this unit. It is required by law to collect, transport and discard the refrigerant in accordance with the "hydrofluorocarbon collection and destruction" regulations.

Installation and operation manual

30

RXYSCQ4+5TMV1B

VRV IV-S system air conditioner

4P399985-1C – 2015.09

4P399985-1C

2015.09

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