Panasonic U-72ME2U9, U-96ME2U9, U-120ME2U9, U-144ME2U9, U-72ME2U94 installation

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INSTALLATION INSTRUCTIONS

Air Conditioner

This air conditioner uses the refrigerant R410A.

NOTE

External diameter of service port R410A: 5/16" (7.94mm)

Model No.

Outdoor Units

Type Outdoor Unit Type Nominal Capacity

72 96 120 144

ME2 2WAY VRF System

U-72ME2U9 U-96ME2U9 U-120ME2U9 U-144ME2U9

U-72ME2U94 U-96ME2U94 U-120ME2U94 U-144ME2U94

• To be connecting Indoor Unit

Indoor Units

Type Indoor Unit Type

4-Way Cassette

36" × 36"

4-Way Cassette

24" × 24"

D1 1-Way Cassette

Concealed Duct

- Medium Static

Concealed Duct

- Low Static

Concealed Duct

- High Static

7 9 12 15 18 24 36 48 54

S-07MU2U6 S-09MU2U6 S-12MU2U6 S-24MU2U6 S-36MU2U6

S-07MY2U6 S-09MY2U6 S-12MY2U6 S-18MY2U6

S-07MD1U6 S-09MD1U6 S-12MD1U6

S-07MF2U6 S-09MF2U6 S-12MF2U6 S-15MF2U6 S-18MF2U6 S-24MF2U6 S-36MF2U6 S-48MF2U6 S-54MF2U6

S-07MM2U6 S-09MM2U6 S-12MM2U6 S-15MM2U6 S-18MM2U6

Nominal Capacity

S-36ME1U6 S-48ME1U6

T2 Ceiling

K2 Wall Mounted

P1 Floor Standing

Concealed Floor

Standing

S-07MK2U6 S-09MK2U6 S-12MK2U6 S-18MK2U6 S-24MK2U6

S-07MP1U6 S-09MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6 S-24MP1U6

S-07MR1U6 S-09MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6 S-24MR1U6

S-12MT2U6 S-18MT2U6 S-24MT2U6

Read through the Installation Instructions before you proceed with the installation. In particular, you will need to read under the “IMPORTANT!” section at the top of the page.

CV6231977845 85464369760022

ACXF60-18511

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IMPORTANT!

WARNING

Please Read Before Starting

This air conditioning system meets strict safety and

operating standards. As the installer or service person, it is an important part of your job to install or service the

system so it operates safely and efﬁciently.

For safe installation and trouble-free operation, you must:

● Carefully read this instruction booklet before beginning.

● Follow each installation or repair step exactly as shown.

● This air conditioner shall be installed in accordance with

National Wiring Regulations.

● Pay close attention to all warning and caution notices given in this manual.

This symbol refers to a hazard or

WARNING

CAUTION

If Necessary, Get Help

These instructions are all you need for most installation

sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your

certiﬁed dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including

failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

• Do not supply power to the unit until all wiring and tubing

are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system.

Carefully refer to the wiring diagram and these instructions

when wiring. Improper connections and inadequate

grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause over-

heating at connection points and a possible re hazard.

• To prevent possible hazards from insulation failure,

the unit must be grounded.

• This equipment is strongly recommended to be installed

with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical shock and re in case of equipment breakdown or

insulation breakdown.

WARNING

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or

unsafe practice which can result in personal injury or product or property damage.

When Wiring

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or

thin aluminum ﬁns on the air conditioner can cut your ﬁngers.

When Installing…

Select an installation location which is rigid and strong

enough to support or hold the unit, and select a location for

easy maintenance.

…In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to

walls and ﬂoors.

Keep the ﬁre alarm and the air

CAUTION

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents

water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air bafe.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

outlet at least 5 ft. (1.5 m) away from the unit.

When Connecting Refrigerant Tubing

• Pay particular attention to refrigerant leakages.

• Ventilate the room immediately, in the event that is refrigerant gas leaks during the installation. Be careful not

to allow contact of the refrigerant gas with a ﬂame as this will cause the generation of toxic gas.

• Keep all tubing runs as short as possible.

• Apply refrigerant lubricant to the matching surfaces of the are and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

WARNING

• When performing piping work, do not mix air

except for speciﬁed refrigerant (R410A) in

refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high tension

inside the refrigerant cycle.

• If the refrigerant comes in contact with a ame,

it produces a toxic gas.

• Do not add or replace refrigerant other than specied type. It may cause product damage, burst and injury, etc.

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• Do not leak refrigerant while piping work for an

WARNING

installation or re-installation, and while repairing

refrigeration parts.

Handle liquid refrigerant carefully as it may cause frostbite.

When Servicing

• Turn the power OFF at the main power box (mains) before opening the unit to check or repair electrical

parts and wiring.

• Keep your ﬁngers and clothing away from any moving parts.

• Clean up the site after you nish, remembering to check that no metal scraps or bits of wiring have been

left inside the unit .

WARNING

• This product must not be modied or disassembled under any circumstances. Modied or disassembled unit may cause re, electric shock or injury.

• Do not clean inside the indoor and outdoor units by users. Engage authorized dealer or

specialist for cleaning.

• In case of malfunction of this appliance, do not repair by yourself. Contact to the sales

dealer or service dealer for a repair.

CAUTION

• Do not touch the air inlet or the sharp

aluminum ﬁns of the outdoor unit. You may get injured.

• Ventilate any enclosed areas when installing or testing the refrigeration system. Leaked refrigerant gas, on contact with re or heat, can

produce dangerously toxic gas.

• Conrm after installation that no refrigerant gas is leaking. If the gas comes in contact with a burning stove, gas water heater, electric room heater or other heat source, it can cause the

generation of toxic gas.

Others

CAUTION

• Do not sit or step on the unit, you may fall down accidentally.

• Do not touch the air inlet or the sharp aluminum ﬁns of the outdoor unit. You may get injured.

• Do not stick any object into the FAN

CASE.

You may be injured and the unit may be damaged.

Check of Density Limit

The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its density will not exceed a set limit.

The refrigerant (R410A), which is used in the air conditioner, is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws imposed to protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its density should rise excessively. Suffocation from leakage of refrigerant is

almost non-existent. With the recent increase in the

number of high density buildings, however, the installation

of multi air conditioner systems is on the increase

because of the need for effective use of oor space, individual control, energy conservation by curtailing heat and carrying power, etc. Most importantly, the multi air conditioner system is able

to replenish a large amount of refrigerant compared to conventional individual air conditioners.

If a single unit of the multi air conditioner system is to be installed in a small room, select a suitable model and

installation procedure so that if the refrigerant

accidentally leaks out, its density does not reach the limit (and in the event of an emergency, measures can be made before injury can occur). ASHRAE and the International Mechanical Code of the ICC as well as CSA provide guidance and dene safeguards related to the use of refrigerants, all of which dene a Refrigerant Concentration Level (RCL) of 400 oz

(11.3 kg) per 1,000 ft

(28.3 m3) for R410A refrigerant.

For additional guidance and precautions related to

refrigerant safety, please refer to the following documents:

International Mechanical Code 2012 (IMC-2012)

(or more recently revised) ASHRAE 15 ASHRAE 34

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Precautions for Installation Using New Refrigerant

CAUTION

1. Care regarding tubing

1-1. Process tubing

●

Material: Use seamless phosphorous deoxidized copper tube for refrigeration. Wall thickness shall comply with the applicable legislation. The minimal wall thickness must be in accordance with the table below.

●

Tubing size: Be sure to use the sizes indicated in the table below.

●

Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints

(optional).

●

When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.

Outer diameter Wall thickness Outer diameter Wall thickness

CAUTION

Material: O Material: O

1/4" (6.35) 0.025 (0.635) 7/8" (22.22) 0.045 (1.143)

3/8" (9.52) 0.030 (0.762) 1-1/8" (28.58) 0.050 (1.27)

1/2" (12.7) 0.035 (0.889) 1-3/8" (34.92) 0.055 (1.397)

5/8" (15.88) 0.040 (1.016) 1-5/8" (41.28) 0.060 (1.524)

3/4" (19.05) 0.042 (1.0668) Unit: in. (mm)

1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A

refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating machine

oil, the prevention of water and other impurities becomes more important than ever.

Use sufficient care in handling the tubing. Seal the tubing ends with caps or tape to prevent dirt, moisture, or other foreign substances from entering. These substances can result in system malfunction.

2. Be sure to recharge the refrigerant only in liquid form.

2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects

in the unit.

2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining

refrigerant and recharge the required total amount of new refrigerant after fixing the leak.

3. Different tools required

3-1. Tool specifications have been changed due to the characteristics of R410A. Some tools for R22- and R407C-type refrigerant systems cannot be used.

R407C tools

Item

Manifold gauge Yes No

Charge hose Yes No To resist higher pressure, material must be changed.

Vacuum pump Yes Yes

Leak detector Yes No

Flaring oil Yes No

* Using tools for R22 and R407C and new tools for R410A together can cause defects.

New

tools?

compatible

with R410A?

Remarks

Types of refrigerant, refrigerating machine oil, and

pressure gauge are different.

Use a conventional vacuum pump if it is equipped with a check valve. If it has no check valve, purchase and

attach a vacuum pump adapter.

Leak detectors for CFC and HCFC that react to chlorine do not function because R410A contains no chlorine. Leak detector for HFC134a can be used for R410A.

For systems that use R22, apply mineral oil (Suniso oil) to the flare nuts on the tubing to prevent refrigerant leakage. For machines that use R407C or R410A, apply

synthetic oil (ether oil) to the flare nuts.

Manifold gauge

Vacuum pump

Outlet Inlet

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3-2. Use R410A exclusive cylinder only.

New refrigerant R410A cannot be used for earlier models

1. Compressor specifications are different.

If recharging a R22 or R407C compressor with R410A, durability will significantly decrease since

some of the materials used for compressor parts are different.

Valve

Single-outlet valve

(with siphon tube) Liquid refrigerant should be recharged

with the cylinder standing on end as shown.

Liquid

2. Existing tubing cannot be used (especially R22).

Completely cleaning out residual refrigerating

machine oil is impossible, even by flushing.

3. Refrigerating machine oil differs (R22).

Since R22 refrigerating machine oil is mineral oil, it does not dissolve in R410A. Therefore, refrigerating

machine oil discharged from the compressor can cause compressor damage.

R22 refrigerating machine oil Mineral oil (Suniso oil)

R407C refrigerating machine oil Synthetic fluid (ether oil)

R410A refrigerating machine oil Synthetic fluid (ether oil)

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CONTENTS

Page Page

IMPORTANT! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Please Read Before Starting Check of Density Limit Precautions for Installation Using New Refrigerant New refrigerant R410A cannot be used for earlier models

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1-1. Tools Required for Installation (not supplied)

1-2. Accessories Supplied

1-3. Type of Copper Tube and Insulation Material

1-4. Additional Materials Required for Installation

1-5. Tubing Length

1-6. Tubing Size

1-7. Straight Equivalent Length of Joints

1-8. Additional Refrigerant Charge

1-9. System Limitations

1-10. Check of Limit Density

1-11. Installing Distribution Joint

1-12. Optional Distribution Joint Kits

1-13. Example of Tubing Size Selection and

Refrigerant Charge Amount

2. SELECTING THE INSTALLATION SITE . . . . . 17

5. HOW TO PROCESS TUBING . . . . . . . . . . . . . 34

5-1. Connecting the Refrigerant Tubing

5-2. Connecting Tubing Between Indoor and

Outdoor Units

5-3. Insulating the Refrigerant Tubing

5-4. Taping the Tubes

5-5. Finishing the Installation

6. AIR PURGING . . . . . . . . . . . . . . . . . . . . . . . . . 37

Air Purging with a Vacuum Pump (for Test Run)

Preparation

7. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7-1. Preparing for Test Run

7-2. Test Run Procedure

7-3. Main Outdoor Unit PCB Setting

7-4. Function Switches on P.C. Board

7-5. Auto Address Setting

7-6. Setting Test Run Remote Controller

7-7. Caution for Pump Down

7-8. Self-Diagnosis Function Table and Contents of

Alarm Display

2-1. Outdoor Unit

2-2. Shield for Horizontal Exhaust Discharge

2-3. Installing the Outdoor Unit in Heavy Snow

Areas

2-4. Precautions When Installing in Heavy Snow

Areas

2-5. Dimensions of Wind Ducting

2-6. Dimensions of Snow Ducting

3. HOW TO INSTALL THE OUTDOOR UNIT . . . . 23

3-1. Transporting

3-2. Installing the Outdoor Unit

3-3. Routing the Tubing

3-4. Prepare the Tubing

3-5. Connect the Tubing

4. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . 28

4-1. General Precautions on Wiring

4-2. Recommended Wire Length and Wire

Diameter for Power Supply System

4-3. Wiring System Diagram

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CAUTION

1. GENERAL

This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the outdoor unit and make sure all accessory parts listed are with the system before beginning.

1-1. Tools Required for Installation (not supplied)

1. Flathead screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Level gauge

6. Sabre saw or keyhole saw

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

1-2. Accessories Supplied

See Table 1.

1-3. Type of Copper Tube and Insulation Material

If you wish to purchase these materials separately from a local

source, you will need:

1. Deoxidized annealed copper tube for refrigerant tubing.

2. Foamed polyethylene insulation for copper tubes as

required to precise length of tubing. Wall thickness of the

insulation should be not less than 5/16" (7.94mm).

3. Use insulated copper wire for field wiring. Wire size varies

with the total length of wiring.

“

See the section

4. ELECTRICAL WIRING” for details.

Check local electrical codes and

CAUTION

regulations before obtaining

wire. Also, check any specified

instructions or limitations.

1-4. Additional Materials Required for Installation

1. Refrigeration (armored) tape

2. Insulated staples or clamps for connecting wire

(See your local codes.)

3. Putty

4. Refrigeration tubing lubricant

5. Clamps or saddles to secure refrigerant tubing

6. Scale for weighing

Table 1 Outdoor Unit

Part name Figure

Connection

tubing

Operating Instructions

Installation Instructions

Outer

diameter ø1-1/8"(ø28.58)

Inner diameter

ø1"(ø25.4)

paper

Q’ty

U-72ME2U9

U-72ME2U94

(6 ton)

U-96ME2U9

U-96ME2U94

(8 ton)

U-120ME2U9

U-120ME2U94

(10 ton)

0 0 1 1

1 1 1 1

U-144ME2U9

U-144ME2U94

(12 ton)

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1-5. Tubing Length

Select the installation location so that the length and size of refrigerant tubing are within the allowable range show in the figure below.

Main tubing length (maximum tubing size) LM = LA + LB …

2. Main distribution tubes LC – LH are selected according to the capacity after the distribution joint.

3. The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to the tube ends.

Sizes of indoor unit connection tubing

1 – 64 are determined by the connection tubing sizes on the indoor units.

Balance tubing

(ø1/4" (6.35mm))

No.1 distribution joint for outdoor unit No.1 distribution joint (for indoor unit)

Explanation of symbols

Distribution joint (CZ: optional parts)

Ball valve (field supply)

T-joint (field supply)

Solidly welded shut (pinch weld)

Max.1.3 ft (40cm)

For extension

R410A optional distribution joint CZ-P680PJ1U (for outdoor unit) CZ-P1350PJ1U (for outdoor unit) CZ-P160BK1U (for indoor unit) CZ-P680BK1U (for indoor unit) CZ-P1350BK1U (for indoor unit)

NOTE

* Be sure to use special R410A distribution joints (CZ: optional parts) for outdoor unit connections and tubing branches.

Table 1-2 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights

Item Mark Contents Length

Actual length

Equivalent length

Allowable tubing

length

Allowable elevation

difference

Allowable length of joint tubing

L1 Max. tubing length

L (L2 – L4)

Difference between max. length and min. length from the No.1 distribution joint

LM Max. length of main tubing (at maximum size)

1, 2~ 64 Max. length of each distribution tube

L1 + 1 + 2~ 63 + A

+ B + LF + LG + LH

A, B + LO, C + LO

Total max. tubing length including length of each distribution tube (only liquid tubing)

Maximum tubing length from outdoor’s 1st distribution

joint to each outdoor unit

When outdoor unit is installed higher than indoor unit

When outdoor unit is installed lower than indoor unit

H2 Max. difference between indoor units

H3 Max. difference between outdoor units

T-joint tubing (field-supply); Max. tubing length between the

first T-joint and solidly welded-shut end point

unit: ft. (m)

656 (200)*

689 (210)*

164 (50)*

3280 (1000)

33 (10)

164 (50)

131 (40)

49 (15)*

13 (4)

6.6 (2)

L = Length H = Height

NOTE

1: The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to

the tube ends.

2: If the longest tubing length (L1) exceeds 295 ft. (90m) (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for

gas tubes and liquid tubes. (Use a field supply reducer.) (Select the tube size from the table of main tube sizes (Table 1-3) on the following page (LA table), and from the table of refrigerant tubing sizes (Table 1-9) on the second following page.)

3: If the longest main tubing length (LM) exceeds 164 ft. (50m), increase the main tube size at the portion before 164 ft. (50m) by 1

rank for the gas tubes. (Use a field supply reducer.) (For the portion that exceeds 164 ft. (50m), set based on the main tube sizes (LA) listed in the table on the following page.) 4: If the tubing length marked "L" (L2 - L4) exceeds 131 ft. (40m), increase the liquid tube and gas tube by 1 rank. 5: If the total distribution tubing length exceeds 1,640ft. (500m), maximum allowable elevation difference (H2) between the indoor

units is calculated by the following formula. Make sure the indoor unit’s actual elevation difference should fall within the figure

calculated as follows.

Unit of account (feet): 49 x (2 - total tubing length(ft.) ÷ 1,640) or Unit of account (meter): 15 x (2 - total tubing length(m) ÷ 500) 6: If any of the tubing length exceeds 98ft. (30m), increase the size of the liquid and gas tubes by 1 rank.

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1-6. Tubing Size

Table 1-3 Main Tubing Size (LA)

Between No.1 distribution joint for outdoor unit and No.1 distribution joint (for indoor unit)

BTU/h

(kW)

Total system tonnage

Gas tubing

Liquid tubing

72,000

(21.1)

ø3/4"

(ø19.05)

96,000

(28.1)

6 8 10 12 14 16 18 20 22 24 26 28 30

ø7/8"

(ø22.22)

ø3/8"

(ø9.52)

120,000

(35.2)

(ø12.7)

ø1/2"

144,000

(42.2)

168,000

(49.2)

ø1-1/8"

(ø28.58)

192,000

(56.3)

ø5/8"

(ø15.88)

216,000

(63.3)

240,000

(70.3)

264,000

(77.4)

288,000

(84.4)

ø1-3/8"

(ø34.92)

(ø19.05)

312,000

(91.4)

ø3/4"

*1: If future extension is planned, select the tubing diameter based on the total tonnage after extension.

However, extension is not possible if the resulting tubing size is three ranks higher. *2: The balance tube (outdoor unit tube) diameter is ø1/4" (6.35mm). *3: Type 1 tubing should be used for the refrigerant tubes.

Size of tubing (LO) between outdoor units

Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.

Table 1-4 Main Tubing Size After Distribution (LB, LC...)

Total capacity

after distribution

Tubing size

Below BTU/h (kW)

Over BTU/h (kW) –

Gas tubing

Liquid tubing

24,200

(7.09)

ø1/2"

(ø12.7)

ø3/8"

(ø9.52)

54,600

(16.0)

24,200

(7.09)

ø5/8"

(ø15.88)

ø3/8"

(ø9.52)

76,800

(22.5)

54,600

(16.0)

ø3/4"

(ø19.05)

ø3/8"

(ø9.52)

102,400

(30.0)

76,800

(22.5)

ø7/8"

(ø22.22)

ø3/8"

(ø9.52)

143,300

(42.0)

102,400

(30.0)

ø1-1/8"

(ø28.58)

ø1/2"

(ø12.7)

178,800

(52.4)

143,300

(42.0)

ø1-1/8"

(ø28.58)

ø1/2"

(ø12.7)

238,900

(70.0)

178,800

(52.4)

ø1-1/8"

(ø28.58)

ø5/8"

(ø15.88)

340,000

(99.6)

238,900

(70.0)

ø1-3/8"

(ø34.92)

ø3/4"

(ø19.05)

Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main tubing size

for the total capacity of the outdoor units.

Unit: in. (mm)

336,000

(98.4)

Unit: in. (mm)

–

340,000

(99.6)

ø1-5/8"

(ø41.28)

ø3/4"

(ø19.05)

360,000

(105.5)

ø1-5/8"

(ø41.28)

Table 1-5 Outdoor Unit Tubing Connection Size (

BTU/h

(kW)

Gas tubing

Liquid tubing

Balance tubing

72,000

(21.1)

ø3/4"

(ø19.05)

ø3/8" (ø9.52) ø3/8" (ø9.52) ø1/2" (ø12.7)

96,000

(28.1)

ø7/8"

(ø22.22)

Brazing connection

Flare connection

ø1/4" (ø6.35)

Flare connection

120,000

(35.2)

–

ø1-1/8"

(ø28.58)

)

Unit: in. (mm)

144,000

(42.2)

ex.) type72

Balance tube

Liquid tube

Table 1-6 Refrigerant Charge Amount at Shipment (for outdoor unit)

BTU/h (kW) 72,000 (21.1) 96,000 (28.1) 120,000 (35.2) 144,000 (42.2)

Initial amount

Table 1-7 Indoor Unit Tubing Connection Size

oz (g) 321 (9,100) 363 (10,300) 300 (8,500) 416 (11,800)

Unit: in. (mm)

Indoor unit type 7 9 12 15 18 24 36 48 54

Gas tubing ø1/2" (ø12.7) ø5/8" (ø15.88)

Liquid tubing ø1/4" (ø6.35) ø3/8" (ø9.52)

Gas tube

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1-7. Straight Equivalent Length of Joints

Design the tubing system by referring to the following table for the straight equivalent length of joints.

Table 1-8 Straight Equivalent Length of Joints

Gas tubing size (in. (mm))

90° elbow

45° elbow

U-shape tube bent (R2-3/8" – 4" (60 – 100mm))

Trap bend

Y-branch distribution joint

Ball valve for service Equivalent length conversion not needed.

1/2"

(12.7)

(0.30)

0.8

(0.23)

(0.90)

7.5

(2.30)

Table 1-9 Refrigerant tubing (Existing tubing can be used.)

Tubing size (in. (mm))

Material: O Material: O Material: O

Outer diameter Wall thickness Outer diameter Wall thickness Outer diameter Wall thickness

1/4" (6.35) 0.025 (0.635) 5/8" (15.88) 0.040 (1.016) 1-1/8" (28.58) 0.050 (1.27)

3/8" (9.52) 0.030 (0.762) 3/4" (19.05) 0.042 (1.0668) 1-3/8" (34.92) 0.055 (1.397)

1/2" (12.7) 0.035 (0.889) 7/8" (22.22) 0.045 (1.143) 1-5/8" (41.28) 0.060 (1.524)

5/8"

(15.88)

1.1

(0.35)

0.9

(0.26)1(0.32)

3.4

(1.05)

9.2

(2.80)

Equivalent length conversion not needed.

3/4"

(19.05)

1.4

(0.42)

4.1

(1.26)

10.5

(3.20)

7/8"

(22.22)

1.6

(0.48)

1.2

(0.36)

4.7

(1.44)

12.5

(3.80)

1-1/8"

(28.58)

1.9

(0.57)

1.4

(0.43)

5.6

(1.71)

15.4

(4.70)

* When bending the tubes, use a

bending radius that is at least 4 times the outer diameter of the tubes. In addition, take sufficient care to avoid crushing or damaging the tubes when bending them.

1-3/8"

(34.92)

2.5

(0.76)

1.8

(0.55)

7.4

(2.26)

19.2

(5.85)

Unit: ft. (m)

1-5/8"

(41.28)

2.8

(0.85)

2.0

(0.61)

8.4

(2.56)

22.3

(6.80)

1-8. Additional Refrigerant Charge

Additional refrigerant charge amount is calculated from the liquid tubing total length, combination number of outdoor unit and

refrigerant amount according to all indoor unit cooling capacity.

Required amount of additional refrigerant charge = [(Necessary amount of additional refrigerant charge per ft. (m) of each size of liquid tube x its tube length) + (...) + (...)] + [Necessary amount of additional refrigerant charge per outdoor unit] + [Necessary amount of additional refrigerant charge for all indoor unit cooling capacity]

* Always charge accurately using a scale for weighing.

Table 1-10-1 Necessary Amount of Additional Refrigerant Charge Per ft. (or per meter), According to Liquid Tubing Size

Liquid tubing size

Additional amount

Table 1-10-2 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit

Further charge a certain amount listed below in addition to the amount of refrigerant charge.

Combination number of outdoor unit 1 2 3

Additional amount oz (g) 70.5 (2,000) 141.0 (4,000) 212 (6,000)

Necessary Amount of Additional Refrigerant Charge for All Indoor Unit Cooling Capacity

Charge a refrigerant amount calculated in the following formula according to the total amount of indoor unit cooling capacity.

inch ø1/4" ø3/8" ø1/2" ø5/8" ø3/4" ø7/8"

(mm) (ø6.35) (ø9.52) (ø12.7) (ø15.88) (ø19.05) (ø22.22)

oz/ft. 0.279 0.602 1.38 1.99 2.78 3.93

(g/m) (26) (56) (128) (185) (259) (366)

Additional refrigerant amount when cooling capacity is BTU/h = Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 (oz) or Additional refrigerant amount when cooling capacity is kW = Cooling capacity (kW) x 1000 x 0.1 + 300 (g)

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1-9. System Limitations

CAUTION

Table 1-11 System Limitations

Max. No. allowable connected outdoor units 3 Max. capacity allowable connected outdoor

units

360,000 BTU/h

(30 ton, 105.5 kW)

Max. connectable indoor units 64

Max. allowable indoor/outdoor capacity ratio 50 – 200 %

*1: In the case of 18 ton (63.3kW) or smaller units, the number is

limited by the total capacity of the connected indoor units. *2: Up to 3 units can be connected if the system has been extended. *3: It is strongly recommended that you choose the unit so the load

can become between 50 and 130%.

Table 1-12 System Limitations of Total Refrigerant Amount

Combination number of outdoor unit 1 2 3

Upper limit oz (

) 1,763 (50,000) 2,821 (80,000) 3,703 (105,000)

Make sure the values calculated using the following formula should not exceed the maximum allowable values (Table 1-12).

Total refrigerant amount = Refrigerant charge amount at shipment (for outdoor unit)

+ Necessary amount of additional refrigerant charge per ft. (or per meter) according to liquid tubing size + Necessary amount of additional refrigerant charge per outdoor unit + Necessary amount of additional refrigerant charge for all indoor unit cooling capacity

Maximum number of connectable indoor units when connected with minimum capacity

Total system

tonnage

Number of

indoor units

Total system

tonnage

Number of

indoor units

6 20 14 45

8 25 16 50 10 32 18 55 12 39 20~30 64

WARNING

Always check the gas density limit for the room in which the unit is installed.

1-10. Check of Limit Density

When installing an air conditioner in a room, it is necessary to ensure that even if the refrigerant gas accidentally leaks out, its

density does not exceed the limit level for that room.

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1-11. Installing Distribution Joint

CAUTION

15〜90°

CAUTION

Pay special attention to any location, such as a basement, etc., where leaking refrigerant can accumulate, since refrigerant gas is heavier than air.

(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT” enclosed with the optional distribution joint kit (CZ-P680PJ1U,

CZ-P1350PJ1U, CZ-P160BK1U, CZ-P680BK1U, CZ-P1350BK1U).

● When connecting a branch tubing to the indoor unit directly, it is necessary for each branch tubing to install at a positive angle with respect to horizontal in order to prevent accumulation of refrigerant oil in stopped units. (See the below chart.)

Branch tubing system Restricted

How to install

branch tubing

Horizontal

* In case of common use solenoid valve kit

When connecting to A When connecting to B

Straight tubing

length over 8 in. (200mm)

Arrow view D

When connecting branch tubing to indoor unit directly

Suction tube

15〜90°

Not restricted

Straight tubing

length over 8 in. (200mm)

Horizontal

Straight tubing length

over 8 in. (200mm)

15〜90°

15〜30°

(Branch tubing

angle)

Liquid tube / Discharge tube

0〜30°

(Branch tubing

angle)

When not connecting

branch tubing to indoor

unit directly

Suction tube /

Discharge tube /

Liquid tube

Horizontal

Upward

Vertical

Downward

Header branch system

Outdoor

Indoor

6.5 ft. (2m)

(From 1st branch to tip of solidly welded part)

Horizontal line

Install at a positive angle

Vertical

Straight tubing

length over 8 in. (200mm)

15〜90°

(Main tubing is horizontal.)

Indoor

Install at a positive angle

Indoor

(15~30°)

Vertical

Straight tubing length over

Vertical

Horizontal line

Solidly welded shut (X)

8 in. (200mm)

Vertical

(15~30°)

Vertical

15〜90°

Vertical

● Be sure to solidly weld shut the T-joint end (marked by X in the figure). In addition, pay attention to the insertion depth of each connected tube so that the flow of refrigerant within

the T-joint is not impeded.

Be sure to use a commercial available T-joint.

● When using the header joint system, do not make further branches in the tubing.

● Do not use the header joint system on the outdoor unit side.

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1-12. Optional Distribution Joint Kits

4-21/64

2-53/64

6-57/64

4-21/64

See the installation instructions packaged with the distribution joint kit for the installation procedure.

Table 1-12

Model name Cooling capacity after distribution Remarks

1. CZ-P680PJ1U 232,000 BTU/h (68.0 kW) or less For outdoor unit

2. CZ-P1350PJ1U more than 232,000 BTU/h (68.0 kW) For outdoor unit

3. CZ-P160BK1U 76,400 BTU/h (22.4 kW) or less* For indoor unit

4. CZ-P680BK1U 232,000 BTU/h (68.0 kW) or less* For indoor unit

5. CZ-P1350BK1U more than 232,000 BTU/h (68.0 kW)* For indoor unit

Tubing size (with thermal insulation)

1. CZ-P680PJ1U For outdoor unit (Capacity after distribution joint is 232,000 BTU/h (68.0 kW) or less.)

Example:

Distribution Joint

Reducing

Joints

Gas tubing Liquid tubing

6-59/64

(175) 5-5/16 (135)

Insulation

4-31/64

(114)

F E D C

Insulation

Distribution Joint

* In case the total capacity of indoor

(110)

3-13/16

(97)

units connected after distribution

exceeds the total capacity of the

outdoor units, select the distribution tube size for the total capacity of the

outdoor units.

(72)

Reducing

Joints

Unit: in. (mm)

Table 1-13 Size of connection point on each part (Shown are inside diameters of tubing)

Size Part A Part B Part C Part D Part E Part F Part G Part H Part I

in. (mm)

ø1-3/8"

(ø34.92)

ø1-1/4"

(ø31.75)

ø1-1/8"

(ø28.58)

ø1"

(ø25.4)

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

2. CZ-P1350PJ1U For outdoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW).)

Example:

Insulation

With regard to the diameter of the tube without description in Table 1-14, use a reducer (field supply) to adjust the tube diameter.

Distribution Joint

Gas tubing Liquid tubing

(175)

5-5/16

(135)

Reducing

Joints

4-31/64

(114)

: Outside dimension

Insulation

Distribution Joint

(110)

3-13/16

(97)

H I

Reducing

Joints

Table 1-14 Size of connection point on each part (Shown are inside diameters of tubing)

ø3/4"

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

Size Part A Part B Part C Part D Part E Part F Part G Part H Part I

in. (mm)

ø1-3/8"

(ø34.92)

ø1-1/4"

(ø31.75)

ø1-1/8"

(ø28.58)

ø1"

(ø25.4)

ø7/8"

(ø22.22)

(ø19.05)

ø3/8"

(ø9.52)

(72)

Unit: in. (mm)

ø3/8"

(ø9.52)

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3. CZ-P160BK1U Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)*

4-21/64

2-53/64

6-57/64

2-53/64

6-57/64

Example:

Insulation

(110)

3-13/16 3-13/16

(97)

Distribution Joint

Gas tubing

(72)

2-53/64

Insulation

(110)

(97)

Distribution Joint

D E

Liquid tubing

D E

Unit: in. (mm)

(72)

Table 1-15 Size of connection point on each part (Shown are inside diameters of tubing)

Size Part A Part B Part C Part D Part E

in. (mm)

ø3/4"

(ø19.05)

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

ø3/8"

(ø9.52)

ø1/4"

(ø6.35)

4. CZ-P680BK1U Use: For indoor unit (Capacity after distribution joint is greater than 76,400 BTU/h (22.4 kW) and no more

than 232,000 BTU/h (68.0 kW).)*

Example:

D C B

Insulation

Distribution Joint

(175)

5-5/16

(135)

Gas tubing

4-31/64

B C

E F

B C D

Reducing

Joints

E F

(114)

F G

Distribution Joint

Insulation

4-21/64

(110)

3-13/16

(97)

F G H

Liquid tubing

(72)

F G H

Reducing

Joints

Unit: in. (mm)

Table 1-16 Size of connection point on each part (Shown are inside diameters of tubing)

Size Part A Part B Part C Part D Part E Part F Part G Part H

in. (mm)

ø1-1/8"

(ø28.58)

ø1"

(ø25.4)

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

ø5/8"

(ø15.88)

ø1/2"

(ø12.7)

ø3/8"

(ø9.52)

ø1/4"

(ø6.35)

5. CZ-P1350BK1U Use: For indoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0 kW).)*

ø5/8"

(ø15.88)

4-21/64

(110)

3-13/16

(97)

ø1/2"

(ø12.7)

Liquid tubing

Reducing

Joints

Unit: in. (mm)

ø3/8"

(ø9.52)

(72)

Example:

C D

Insulation

With regard to the diameter of the tube without description in Table 1-17, use a reducer (field supply) to adjust the tube diameter.

Table 1-17 Size of connection point on each part (Shown are inside diameters of tubing)

Size Part A Part B Part C Part D Part E Part F Part G Part H Part I Part J

in. (mm)

ø1-3/8"

(ø34.92)

(175)

5-5/16

(135)

Distribution Joint

C D

G H

ø1-1/4"

(ø31.75)

ø1-1/8"

(ø28.58)

Gas tubing

Reducing

Joints

ø1"

(ø25.4)

C D

4-31/64

(114)

: Outside dimension

ø7/8"

(ø22.22)

ø3/4"

(ø19.05)

Distribution Joint

Insulation

In case the total capacity of indoor units connected after distribution exceeds the total capacity of the outdoor units, select the distribution tube size for the total capacity of the outdoor units.

ø1/4"

(ø6.35)

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1-13. Example of Tubing Size Selection and Refrigerant Charge Amount

CAUTION

Additional refrigerant charging

Based on the values in Tables 1-3, 4, 5, 7, 10-1 and 10-2, use the liquid tubing size and length, and calculate the amount of additional refrigerant charge using the formula below.

Unit of account (oz)

Required additional refrigerant charge (oz)

Unit of account (

)

Required additional

refrigerant charge (g)

(a) : Liquid tubing Total length of ø7/8" (ft.) or (m) (d) : Liquid tubing Total length of ø1/2" (ft.) or (m)

(b) : Liquid tubing Total length of ø3/4" (ft.) or (m) (e) : Liquid tubing Total length of ø3/8" (ft.) or (m)

Charging procedure

●

Be sure to charge with R410A refrigerant in liquid form.

1. After performing a vacuum, charge with refrigerant from the liquid tubing side. At this time, all valves must be in the “fully closed” position.

2. If it was not possible to charge the designated amount, operate the system in Cooling mode while charging with refrigerant from the gas tubing side. (This is performed at the time of the test run. For this, all valves must be in the “fully open” position. However, if only one outdoor unit is installed, a balance tube is not used. Therefore, leave the valves fully closed.) Charge with R410A refrigerant in liquid form. With R410A refrigerant, charge while adjusting the amount being fed a little at a time in order to prevent liquid refrigerant from backing up.

After charging is completed, turn all valves to the “fully open” position.

●

Replace the tubing covers as they were before.

●

CAUTION

For type 72 For type 96 For type 120/144

Balance tube

Use a flathead screwdriver and

open by turning the part with the screw groove to the right, from “–” to “|”.

Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit

+ 3.93 × (a) + 2.78 × (b) + 1.99 × (c) + 1.38 × (d) + 0.602 × (e) + 0.279 × (f) + Necessary amount of additional refrigerant charge for all indoor unit cooling capacity

Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit

+ 366 × (a) + 259 × (b) + 185 × (c) + 128 × (d) + 56 × (e) + 26 × (f) + Necessary amount of additional refrigerant charge for all indoor unit cooling capacity

1. R410A additional charging absolutely must be done through liquid charging.

2. The R410A refrigerant cylinder has a gray base color, and the top part is pink.

3. The R410A refrigerant cylinder includes a siphon tube. Check that the siphon tube is present. (This is indicated on the label at the top of the cylinder.)

4. Due to differences in the refrigerant, pressure, and refrigerant oil involved in installation, it is not possible in some cases to use the same tools for R22 and for R410A.

Balance tube

Use a flathead screwdriver and

open by turning the part with the screw groove to the right, from “–” to “|”.

Balance tube

Use a flathead screwdriver and

open by turning the part with the screw groove to the right, from “–” to “|”.

Liquid tube

Use a hex wrench (width 5/32 inch (4mm)) and turn to the left to open.

Gas tube

Use a flathead screwdriver and

open by turning the part with the screw groove to the right, from “–” to “|”.

Liquid tube

Use a hex wrench (width 5/32 inch (4mm)) and turn to the left to open.

Gas tube

Use a flathead screwdriver and

open by turning the part with the screw groove to the right, from “–” to “|”.

Liquid tube

Use a hex wrench (width 5/32 inch (4mm)) and turn to the left to open.

Gas tube

Use a flathead screwdriver and

open by turning the part with the screw groove to the right, from “–” to “|”.

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Example:

Outdoor unit

Type 96 Type 72

Example of all outdoor units

●

cooling capacity

Type 72: 72,000 BTU/h (21.1 kW)

Type 96: 96,000 BTU/h (28.1 kW)

[Total]

168,000 BTU/h (49.2 kW)

1 2 3 4

Example of each tubing length

●

Main tubing Distribution joint tubing

LA = 131 ft. (40m) Outdoor side Indoor side LB = 16 ft. (4.9m)

LC = 16 ft. (4.9m)

A = 7 ft.

B = 7 ft.

(2.1m) (2.1m)

1 = 98 ft. 2 = 16 ft. 3 = 16 ft. 4 = 65 ft.

Example of all indoor unit cooling capacity

●

(30m) (4.9m) (4.9m) (19.8m)

[Type 48 x 3] 47,800 x 3 = 143,400 BTU/h (14.0 x 3 = 42.0 kW)

Type 48 Type 48 Type 48 Type 36

[Type 36 x 1] 36,000 x 1 = 36,000 BTU/h (10.6 x 1 = 10.6 kW)

[Total] 179,400 BTU/h (52.6 kW)

Obtain liquid tubing size from Tables 1-3, 4, 5, 7 and 10-1.

●

Main tubing

LA = ø5/8 (in.) (Total capacity of indoor unit is 179,400 BTU/h (52.6kW)) LB = ø1/2 (in.) (Total capacity of indoor unit is 131,600 BTU/h (38.6kW)) LC = ø3/8 (in.) (Total capacity of indoor unit is 83,800 BTU/h (24.6kW))

Distribution joint tubing

Outdoor side Indoor side

Obtain additional charge amount for each tubing size and additional refrigerant charge amount for all indoor unit cooling capacity.

●

A: ø3/8 (in.) B: ø3/8 (in.) (from outdoor unit connection tubing) 1: ø3/8 (in.) 2: ø3/8 (in.) 3: ø3/8 (in.) 4: ø3/8 (in.) (from indoor unit connection tubing)

Note 1: The charge amounts per 1 ft. are different for each liquid tubing size.

ø5/8 (in.)

ø1/2 (in.)

ø3/8 (in.)

LA : 131 ft. × 1.99 oz/ft. = 261 oz (40m × 185 g/m = 7,400g)

→

LB : 16 ft. × 1.38 oz/ft. = 22 oz (4.9m × 128 g/m = 627g)

→

LC +

A – B + 1 – 4

: 225 ft. × 0.602 oz/ft. = 135 oz (68.6m × 56 g/m = 3,842g)

Total 418 oz (Total 11,869g)

Additional refrigerant charge amount is 418 oz (11,869g).

Note 2: Necessary amount of additional refrigerant charge per outdoor unit is 141oz (4,000g) in combination of 2 units.

(See the Table 1-10-2.)

Note 2) Amount of additional charge for outdoor unit (combination number) : 141oz (4,000g)

Note 3: Necessary amount of additional refrigerant charge for all indoor unit cooling capacity

[BTU/h] [kW]

179,400 BTU/h Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 oz = 179,400 x 1.034 x 0.001 + 10.6 = 196 oz

(52.6 kW) (Cooling capacity (kW) x1000 x 0.1 + 300 = 52.6 x 1000 x 0.1 + 300 = 5,560 g)

Note 1) Amount of additional charge per tubing length : 418 oz (11,869g) Note 2) Amount of additional charge for outdoor unit (combination number) : 141 oz (4,000g) Note 3) Amount of additional charge for all indoor unit cooling capacity : 196 oz (5,560g)

Total of additional refrigerant charge amount : 755 oz (21,429g)

Therefore, the total of additional refrigerant charge amount reaches 755 oz (21,429g).

Obtain overall refrigerant charge amount.

●

Overall refrigerant charge amount of the system indicates the calculated value shown above the additional charge amount in

addition to the total refrigerant charge amount (shown in the Table 1-6) at shipment in total cooling capacity of outdoor unit.

Refrigerant charge amount at shipment (total cooling capacity of outdoor unit) : : [168,000BTU/h] 684 oz [49.2kW] (19,400g) Total of additional refrigerant charge amount

755 oz (21,429g)

Grand total 1,439 oz (40,829g)

Therefore, overall refrigerant charge amount of the system reaches 1,439 oz (40,829g).

Remark:

Be sure to include the values in Table 1-10-2 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit.

CAUTION

Be sure to check the limit density for the room in which the indoor unit is installed.

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2. SELECTING THE INSTALLATION SITE

CAUTION

2-1. Outdoor Unit

AVOID:

heat sources, exhaust fans, etc.

●

damp, humid or uneven locations

●

indoors (no-ventilation location)

●

DO:

choose a place as cool as possible.

●

choose a place that is well ventilated.

●

allow enough room around the unit for air intake/exhaust

●

and possible maintenance.

use lug bolts or equal to bolt down unit, reducing vibration

●

and noise.

Exhaust fan

Hot air

Heat

Out-

door unit

Installation Space

Install the outdoor unit where there is enough space for ventilation. Otherwise the unit may not operate properly. The figure shows the minimum space requirement around

the outdoor units when 3 sides are open and only 1 side is

shuttered, with open space above the unit. The mounting base should be concrete or a similar material that allows for adequate drainage. Make provisions for anchor bolts, platform height, and other site-specific installation requirements.

source

Leave space open above the

CAUTION

●

unit.

Construct louvers or other

●

openings in the wall, if necessary, to ensure adequate ventilation.

NOTE

Do not do any wiring or tubing within 1 ft. (300mm) of the

●

front panel, because this space is needed as a servicing

space for the compressor.

Ensure a base height of 4 in. (100mm) or more to ensure

●

that drainage water does not accumulate and freeze around the bottom of the unit.

If installing a drain pan, install the drain pan prior to

●

installing the outdoor unit.

* Make sure there is at least 6 in. (150mm) between the

outdoor unit and the ground.

Also, the direction of the tubing and electrical wiring should be from the front of the outdoor unit.

* When setting the anchor bolt to "B" or "C" (see page 20),

make enough space for installation operation. (Space between units: Over 0.6 ft. (180mm), Space from wall: Over 0.83 ft. (250mm))

* When installing a snow-proof ducting, make space between

the units 7-3/32 in. (180mm) regardless of the positions (A C) for installation holes.

* Make a walk-in space in front and behind the unit to ensure

ease of operation.

Example: 2 units installation

* For other installation, follow the standards of combination

installation.

Wall height: Less than 1.7ft. (500mm)

Wall height: Unlimited

* Over 2 in.

(50mm)

Over 2-3/8 in. (60mm)

Wall height: Less than 4.9 ft. (1500mm)

Over 1 ft.(300mm)

* Over 2 in. (50mm)

Over 1.7ft. (500mm)

Wall height: Unlimited

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2-2. Shield for Horizontal Exhaust Discharge

CAUTION

It is necessary to install an air-discharge chamber (field supply) to direct exhaust from the fan horizontally if it is difficult to provide a minimum space of 7 ft. (2m) between the airdischarge outlet and a nearby obstacle.

In regions with heavy snowfall,

CAUTION

the outdoor unit should be provided with a solid, raised platform and snow-proof ducting (field supply).

2-3. Installing the Outdoor Unit in Heavy Snow

Areas

In locations where wind-blown snow can be a problem, snow-proof ducting (field supply) should be fitted to the unit and direct exposure to the wind should be avoided as much as possible.

The following problems may occur if proper countermeasures are not taken:

The fan in the outdoor unit may stop running, causing the

●

unit to be damaged.

There may be no air flow.

●

The tubing may freeze and burst.

●

The condenser pressure may drop because of strong wind,

●

and the indoor unit may freeze.

AVOID

Without snowproof ducting (Without platform)

2-4. Precautions When Installing in Heavy Snow

Areas

a) The platform should be higher than the maximum snow

depth.

b) The 2 anchoring feet of the outdoor unit should be used for

the platform, and the platform should be installed beneath the air-intake side of the outdoor unit.

c) The platform foundation must be solid and the unit must be

secured with anchor bolts.

d) When installing on a roof subject to strong wind,

countermeasures must be taken to prevent the unit from being overturned.

Fallen snow

With snowproof ducting (High platform)

00_302411_EN.indd 18 2018/7/4 13:27:22

2-5. Dimensions of Wind Ducting

Reference diagram for air-discharge chamber (field supply) For type 72/96

Note: Can be installed so that the air direction is to the front or rear direction.

unit: in. (mm)

Air direction: Front direction

30-35/64

(776)

29-29/64

(748)

27-43/64

(703)

(733)

28-55/64

(2570)

101-3/16

30-5/16

(770) (770)

Front view Right side view Front view Right side view

39-31/64

(1003)

5/64 (2)3/64 (1)

For type 120/144

Note: Can be installed so that the air direction is to the front or rear direction.

30-35/64

(776)

29-29/64

(748)

30-5/16

Air direction: Rear direction

Top viewTop view

39-31/64

(733)

28-55/64

(2570)

101-3/16

(1003)

unit: in. (mm)

3/64 (1)5/64 (2)

Air direction: Front direction

46-11/16

(1186)

45-19/32

(1158)

43-13/16

(1113)

46-29/64

(1180)

Front view Right side view Front view Right side view

3/64 (1)

(733)

28-55/64

(2570)

101-3/16

39-31/64

(1003)

5/64 (2)

46-11/16

(1186)

45-19/32

(1158)

46-29/64

(1180)

Air direction: Rear direction

Top viewTop view

39-31/64

5/64 (2)

(733)

28-55/64

(2570)

101-3/16

(1003)

3/64 (1)

00_302411_EN.indd 19 2018/7/4 13:27:24

Reference diagram for air-discharge chamber (field supply) (continued)

Combination of units

For various types of combination, refer to Technical Data.

unit: in. (mm)

Top view

(Before installing air-discharge chamber)

C : 28-47/64 (730) Installation hole pitch

A : 37-61/64 (964) Installation hole pitch forward tubing direction

B : 28-47/64 (730) Installation hole pitch downward tubing direction

I I

F L

Top view

39-31/64

(733)

28-55/64

(2570)

101-3/16

3/64 (1) 5/64 (2)

(1003)

Front view Right side view

According to the installation site, you may choose the setting position in the depth direction of the anchor bolt from “A”, “B” or “C”.

Sample of small size models (3 units):

D E F G H I J K L M

Installation hole pitch

A :

B :

Installation hole pitch

C :

Installation hole pitch

2-23/64

(60)

7-3/32

(180)

7-3/32

(180)

2-1/8

(54)

6-27/32

(174)

6-27/32

(174)

95-29/32

(2,436)

105-23/64

(2,676)

105-23/64

(2,676)

3-35/64

(90)

8-17/64

(210)

8-17/64

(210)

94-31/64

(2,400)

103-15/16

(2,640)

103-15/16

(2,640)

3-15/64

(82)

7-61/64

(202)

7-61/64

(202)

29-9/64

(740)

29-9/64

(740)

29-9/64

(740)

30-35/64

(776)

30-35/64

(776)

30-35/64

(776)

29-29/64

Sample of middle size models (3 units):

D E F G H I J K L M

Installation hole pitch

A :

B :

Installation hole pitch

C :

Installation hole pitch

2-23/64

(60)

7-3/32

(180)

7-3/32

(180)

2-1/8

(54)

6-27/32

(174)

6-27/32

(174)

144-21/64

(3,666)

153-25/32

(3,906)

153-25/32

(3,906)

3-35/64

(90)

8-17/64

(210)

8-17/64

(210)

142-29/32

(3,630)

152-23/64

(3,870)

152-23/64

(3,870)

3-15/64

(82)

7-61/64

(202)

7-61/64

(202)

45-9/32

(1,150)

45-9/32

(1,150)

45-9/32

(1,150)

46-11/16

(1,186)

46-11/16

(1,186)

46-11/16

(1,186)

45-19/32

(1,158)

45-19/32

(1,158)

45-19/32

(1,158)

(748)

27-43/64

(703)

27-43/64

(703)

27-43/64

(703)

43-13/16

(1,113)

43-13/16

(1,113)

43-13/16

(1,113)

00_302411_EN.indd 20 2018/7/4 13:27:27

2-6. Dimensions of Snow Ducting

26-7/64

57-9/16

42-1/4

57-9/16

Reference diagram for snow-proof ducting (field supply) For type 72/96

Note: Can be installed so that the air direction is to the front or rear direction.

(663)

Air direction: Front direction

(663)

unit: in. (mm)

Air direction: Rear direction

(872)

34-21/64

(74)

2-29/32

19-1/4

(489)

(1462)

(655)

25-25/32

(478)

18-13/16

For type 120/144

(872)

34-21/64

30-35/64

(776)

29-29/64

(748)

27-43/64

(703)

19-1/4

(489)

30-5/16

(770)

68-13/64

(1748)

Front view Right side view Front view Right side view

Note: Can be installed so that the air direction is to the front or rear direction.

(1073)

3/64 (1) 5/64 (2)

(733)

28-55/64

(2570)

101-3/16

Air direction: Front direction

39-31/64

(1003)

58-5/8 (1489)

19-1/4

(489)

18-13/16

(478)

25-25/32

57-9/16

(655)

(1462)

30-35/64

(776)

29-29/64

(748)

42-1/4 (1073)

Top viewTop view

39-31/64

5/64 (2) 3/64 (1)

Air direction: Rear direction

(1003)

unit: in. (mm)

19-1/4

(489)

(872)

34-21/64

(74)

2-29/32

19-1/4

(489)

(1462)

(655)

25-25/32

18-13/16

46-11/16

(1186)

45-19/32

(1158)

43-13/16

(1113)

(733)

28-55/64

19-1/4

(489)

101-3/16

(478)

46-29/64

(1180) 84-61/64

(2158)

Front view Right side view Front view Right side view

39-31/64

(1003)

(2570)

58-5/8

(1489)

5/64(2)3/64(1)

19-1/4

(489)

18-13/16

(478)

25-25/32

34-21/64

(1462)

57-9/16

(655)

(872)

46-11/16

(1186)

45-19/32

(1158)

Top viewTop view

39-31/64

(1003)

3/64(1)5/64(2)

19-1/4

(489)

00_302411_EN.indd 21 2018/7/4 13:27:35

Reference diagram for snow-proof ducting (field supply) (continued)

8-17/64 (210) 8-17/64 (210)

Combination of units

For various types of combination, refer to Technical Data.

7-3/32 (180) 7-3/32 (180)

(872)

34-21/64

unit: in. (mm)

Top view

(Before installing snow-proof ducting)

39-3/8

(1000)

Top view

(872)

34-21/64

7-61/64 (202)

(515)

20-9/32

(1466)

57-23/32

Front view Right side view

2-29/32 (74)

(1462)

57-9/16

(655)

25-25/32

35/64

(14)

19-1/4

(489)

(478)

18-13/16

C : 28-47/64 (730) Installation hole pitch

A : 37-61/64 (964) Installation hole pitch forward tubing direction

B : 28-47/64 (730) Installation hole pitch downward tubing direction

According to the installation site, you may choose the setting position in the depth direction of the anchor bolt from “A”, “B” or “C”.

7-61/64 (202)

(515)

20-9/32

57-23/32

(1466)

35/64 (14)

19-1/4

(489)

(478)

18-13/16

(74)

2-29/32

28-55/64

57-9/16

(655)

25-25/32

3/64 (1) 5/64 (2)

(733)

(2570)

101-3/16

(1462)

39-31/64

(1003)

Sample of small size models (3 units):

D E F G H I

A : Installation hole pitch

B : Installation hole pitch

C : Installation hole pitch

29-9/64

(740)

30-5/16

(770)

105-23/64

(2,676)

105-1/8

(2,670)

100-29/32

(2,563)

143-5/8

(3,648)

19-19/64

(490)

(478)

25-53/64

18-13/16

57-9/16

(656)

(1462)

Sample of middle size models (3 units):

D E F G H I

A : Installation hole pitch

B : Installation hole pitch

C : Installation hole pitch

45-9/32

(1,150)

46-29/64

(1,180)

153-25/32

(3,906)

153-35/64

(3,900)

149-21/64

(3,793)

192-3/64

(4,878)

00_302411_EN.indd 22 2018/7/4 13:27:42

3. HOW TO INSTALL THE OUTDOOR UNIT

CAUTION

3-1. Transporting

When transporting the unit, have it delivered as close to the installation site as possible without unpacking. Use a hook for suspending the unit.

●

CAUTION

When hoisting the outdoor unit, pass ropes or straps under the bottom plate

as shown in the figure at right. When hoisting, the angle between the rope and top panel must be 70° or greater so that the rope does not come into

contact with the fan guard. (Use 2 lengths of rope 25 ft. (approx. 7.6 m) long or more.)

When passing the ropes through the square holes of the bottom plate:

●

Place the rope in the outer edge of the square holes.

Use protective panels or padding at all locations where the rope

●

contacts the outer casing or other parts to prevent scratching.

In particular, use protective material (such as cloth or cardboard)

A A

Rope

to prevent the edges of the top panel from being scratched.

Be careful of the fan.

●

There is danger of injury if the fan starts to turn during inspection.

Be sure to turn OFF the remote power switch before beginning

inspection.

Detailed drawing A

This is not a lifting lug.

3-2. Installing the Outdoor Unit

(1) Use anchor bolts (15/32" or M12) or similar to securely anchor the unit in place. (2) Make sure the rubber vibration insulator and platform extend to the inside of the legs. In addition, the washers used to anchor the

unit from the top must be larger than the installation anchor holes.

Type 120/144

D D

E E

Unit: in. (mm)

Vibration insulator Vibration insulator Vibration insulator

D D

A: 37-61/64 (964)

(Installation hole pitch)

E E

2 support area per each leg (x2) must install vibration insulator material and mount. The area of dimension marked with the asterisk (*) must cover the base.

Unit: in. (mm)

Vibration insulator

View F (area D/E) View G (area D) View H (area E)

Anchor bolt

Washer

19-32 (15)

*2-51/64 (71)

Base

Leg

Vibration insulator

4” (100)

Over

Leg

*3-15/16 (100)

Base

Unit: in. (mm)

Installation elongated hole

(19/32 (15) x 53/64(21))

45/64 (18)

9-59/64 (252)

19/32 (15)

B: 28-47/64 (730)

Anchor bolt

Washer

4” (100)

Over

(Installation hole pitch)

D D

Anchor bolt

Vibration insulator

*3-15/16 (100)

Base

C: 28-47/64 (730)

(Installation hole pitch)

Unit: in. (mm)

Washer

4” (100)

00_302411_EN.indd 23 2018/7/4 13:27:42

Type 72/96 Type 120/144

Air intake Air intake

Unit: in. (mm)

Air intake

39-3/8 (1000)

19/32 (15) 19/32 (15)

29-9/64 (740) 45-9/32 (1150)

(Installation hole pitch) (Installation hole pitch)

30-5/16 (770) 46-29/64 (1180)

A : 37-61/64 (964) [Installation hole pitch] * The tubing is routed out from the front. B : 28-47/64 (730) [Installation hole pitch] * The tubing is routed out from the bottom. C : 28-47/64 (730) [Installation hole pitch]

Air intake

39-3/8 (1000)

45/64 (18)

Air intake

45/64 (18)

3-3. Routing the Tubing

The tubing can be routed out either from the front or from the bottom.

●

The connecting valve is contained inside the unit. Therefore, remove the front panel.

●

(1) If the tubing is routed out from the front, use cutting pliers or a similar tool to cut out the tubing outlet slit (part indicated by

from the tubing cover.

For type 72/96

Front

Bottom

For type 120/144 ex.) type72/96 (208/230 V model)

Tubing cover

Front

Bottom

Remove 3 screws

ex.) type 120/144 (208/230 V model)

Use cutting pliers or similar tool to cut cover out

)

Remove 8 panel screws from front panel

Remove 10 panel screws from front panel

(2) If the tubing is routed out from the bottom, remove the slit part ( ).

Use a drill bit approximately 13/64" (5.2 mm) dia. to create holes at the

●

5 slit hole indentations (openings).

Punch out the slit part (

●

Be careful not to damage the base plate.

●

Tubing cover

Remove 4 screws

Use cutting pliers or similar tool to cut cover out

Tubing cover

Slit hole

Tubing cover

Slit part

Indentation (5 locations)

00_302411_EN.indd 24 2018/7/4 13:27:43

3-4. Prepare the Tubing

CAUTION

Material: Use seamless phosphorous deoxidized copper tube for refrigeration. Wall thickness shall comply with the applicable

●

legislation. The minimal wall thickness must be in accordance with the table below.

Tubing size

●

Use the tubing size indicated in the table below.

When cutting the tubing, use a tube cutter, and be sure to remove any burrs.

●

(The same applies to distribution tubing (optional).)

When bending the tubes, bend each tube using a radius that is at least 4 times the outer diameter of the tube.

●

When bending, use sufficient care to avoid crushing or damaging the tube.

For flaring, use a flare tool, and be sure that flaring is performed correctly.

●

CAUTION

Use sufficient caution during preparation of the tubing. Seal the tube ends by means of caps or taping to prevent dust, moisture, or other foreign substances from entering the tubes.

Refrigerant tubing (Existing tubing can be used.)

Tubing size (in. (mm))

Material: O Material: O

Outer diameter Wall thickness Outer diameter Wall thickness

1/4" (6.35) 0.025 (0.635) 7/8" (22.22) 0.045 (1.143)

3/8" (9.52) 0.030 (0.762) 1-1/8" (28.58) 0.050 (1.27)

1/2" (12.7) 0.035 (0.889) 1-3/8" (34.92) 0.055 (1.397)

5/8" (15.88) 0.040 (1.016) 1-5/8" (41.28) 0.060 (1.524)

3/4" (19.05) 0.042 (1.0668)

3-5. Connect the Tubing

Use the supplied connector tubing. (See figure below.)

●

Type 72 (6 Ton) Type 120 (10 Ton)

Refrigerant

tubing

Gas tube Brazing No

Liquid tube Flare No

Balance tube Flare No

Connection

method

Supplied

parts used?

Refrigerant

tubing

Gas tube Brazing

Liquid tube Flare No

Balance tube Flare No

Connection

method

(ø25.4 ø28.58)

Supplied

parts used?

Yes

ø1" ø1-1/8"

Type 96 (8 Ton) Type 144 (12 Ton)

Refrigerant

tubing

Gas tube Brazing No

Liquid tube Flare No

Balance tube Flare No

Connection

method

Supplied

parts used?

Refrigerant

tubing

Gas tube Brazing

Liquid tube Flare No

Balance tube Flare No

Connection

method

Supplied

parts used?

Yes

ø1" ø1-1/8"

(ø25.4 ø28.58)

00_302411_EN.indd 25 2018/7/4 13:27:44

Refrigerant tube port

Use caulking, putty, or a similar material to fill any gaps at the

●

refrigerant tube port (

) in order to prevent rainwater, dust or

foreign substances from entering the unit.

* Perform this work even if the tubing is routed out in a downward

direction.

Tighten each cap as specified below.

●

Tightening torque for each cap

Cap tightening torque

Width unit: lbs · inch unit: N · m unit: {kgf · cm}

Service port cap 43/64" (17mm) 90 - 100 10 - 12 {100 - 120}

Valve cap

35/64" (14mm),

43/64" (17 mm)

3/4" (19 mm) 120 - 170 14 - 20 {140 - 200}

17/16" (27mm) 190 - 240 22 - 28 {220 - 280}

170 - 220 20 - 25 {200 - 250}

Tubing cover

Tubing routed out

through the front side

Bottom plate

Tubing routed out

through the bottom

For type 72

Service port cap width 43/64 (17)

Valve cap width 3/4 (19)

Valve cap width 35/64 (14)

Service port cap width 43/64 (17)

Flare nut ø1/4 (6.35)

For type 120/144

Service port cap width 43/64 (17)

Valve cap width 17/16 (27)

Valve cap width 35/64 (14)

Service port cap width 43/64 (17)

Flare nut ø1/4 (6.35)

Flare nut ø3/8 (9.52)

Flare nut ø1/2 (12.7)

Valve cap width 35/64 (14)

Service port cap width 43/64 (17)

Valve cap width 43/64 (17)

Service port cap width 43/64 (17)

For type 96

Service port cap width 43/64 (17)

Valve cap width 3/4 (19)

Valve cap width 35/64 (14)

Service port cap width 43/64 (17)

Flare nut ø1/4 (6.35)

Unit: in. (mm)

Valve cap width 43/64 (17)

Flare nut ø3/8 (9.52)

Do not apply an adjustable wrench to the hexagonal part.

Do not use two adjustable wrenches when removing or installing the balance tube flare nut. In particular, do not apply an adjustable wrench to the hexagonal part at the top of the valve. (If force is applied to this part, gas leakage will

occur.)

Use two adjustable wrenches, as shown in the figure, when removing the liquid tube valve flare nut.

1. Do not apply a wrench to the valve cap when removing or installing the flare nuts. Doing so may damage the valve.

2. If the valve cap is left off for a long period of time, refrigerant leakage will occur. Therefore, do not leave the valve cap off.

3. Applying refrigerant oil to the flare surface can be effective in preventing gas leakage, however be sure to use a refrigerant oil which is suitable for

the refrigerant that is used in the system. (This unit

utilizes R410A refrigerant, and the refrigerant oil is

ether oil (synthetic oil).

However, hub oil (synthetic oil) can also be used.)

Service port cap width 43/64 (17)

00_302411_EN.indd 26 2018/7/4 13:27:45

Precautions for brazing

CAUTION

●

Be sure to replace the air inside the tube with nitrogen to prevent oxide film from forming during the brazing process. Be sure to use a damp cloth or other means to cool the valve unit during brazing.

Work method

Brazing locations

CAUTION

Pressure-reducing valve (regulator)

Field-supply tube

Taping

Remote valve

Nitrogen

1. Be sure to use nitrogen. (Oxygen, CO2, and CFC must not be used.)

2. Use a pressure-reducing valve on the nitrogen tank.

3. Do not use agents intended to prevent the formation of oxide film.

They will adversely affect the refrigeration oil, and may cause equipment failure.

4. The balance tube is not used if only 1 outdoor unit is installed.

Use the unit in the same conditions as when it was shipped from the factory.

00_302411_EN.indd 27 2018/7/4 13:27:45

4. ELECTRICAL WIRING

CAUTION

4-1. General Precautions on Wiring

(1) Before wiring, confirm the rated voltage of the unit as

shown on its nameplate, then carry out the wiring closely

following the wiring diagram.

WARNING

(2) This equipment is strongly recommended to be

installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown. Provide a power outlet to be used exclusively for each unit, and Earth Leakage Circuit Breaker (ELCB) for overcurrent protection should be

provided in the exclusive line.

(3) To prevent possible hazards from insulation failure,

the unit must be grounded.

(4) Each wiring connection must be done in accordance with

the wiring system diagram. Wrong wiring may cause the

unit to misoperate or become damaged.

(5) Do not allow wiring to touch the refrigerant tubing,

compressor, or any moving parts of the fan.

(6) Unauthorized changes in the internal wiring can be very

dangerous. The manufacturer will accept no responsibility

for any damage or misoperation that occurs as a result of

such unauthorized changes.

(7) Regulations on wire diameters differ from locality to

locality. For field wiring rules, please refer to your LOCAL ELECTRICAL CODES before beginning.

You must ensure that installation complies with all relevant

rules and regulations.

(8) To prevent malfunction of the air conditioner caused by

electrical noise, care must be taken when wiring as follows:

The remote control wiring and the inter-unit control wiring

●

should be wired apart from the inter-unit power wiring. Use shielded wires for inter-unit control wiring between

●

units and ground the shield on both sides.

(9) If the power supply cord of this appliance is damaged,

it must be replaced by a repair shop appointed by the manufacturer, because special purpose tools are required.

4-2. Recommended Wire Length and Wire Diameter for Power Supply System

Outdoor unit Indoor unit

Type

U-72ME2U9 50 A K2 15 A

U-96ME2U9 60 A

U-120ME2U9 60 A E1 15 A

U-144ME2U9 60 A

U-72ME2U94 25 A

U-96ME2U94 25 A

U-120ME2U94 25 A

U-144ME2U94 30 A

Control wiring

(A) Inter-unit (between outdoor and

indoor units) control wiring*

AWG #18 (0.75 mm2) AWG #18 (0.75 mm2) AWG #18 (0.75 mm2)

Max. 3,280 ft. (1,000 m) Max. 1,640 ft. (500 m) Max. 650 ft. (200 m) Total

Time delay fuse or

circuit capacity

(B) Remote control wiring (C) Control wiring for group control

Type

D1, U2, Y2, F2, M2, T2, P1, R1

Time delay fuse or

circuit capacity

15 A

(D) Inter-outdoor unit control wiring

NOTE

* With ring-type wire terminal.

00_302411_EN.indd 28 2018/7/4 13:27:45

AWG #18 (0.75 mm

Max. 980 ft. (300 m)

)

4-3. Wiring System Diagram

Power supply

208 / 230V, 60Hz, 1-PH

Remote Controller

WHT

BLK

Power supply

208 / 230V, 60Hz, 1-PH

Remote Controller

WHT

BLK

Power supply

208 / 230V, 60Hz, 1-PH

Power supply

208 / 230V, 60Hz, 1-PH

Remote Controller

WHT

BLK

L1 L2

Ground

L1 L2

Ground

Group control:

L1 L2

Ground

L1 L2

Ground

Indoor unit (No. 1)

U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9

Outdoor unit INV unit

L1 L2 L3

Power supply

208 / 230V, 60Hz, 3-PH

Ground

Indoor unit (No. 2)

Inter-outdoor unit control wiring

Outdoor unit INV unit

L1 L2 L3

Power supply

208 / 230V, 60Hz, 3-PH

Ground

Indoor unit (No. 3)

Indoor unit (No. n)

U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94

Outdoor unit INV unit

Inter-outdoor unit control wiring

Outdoor unit INV unit

L1 L2 L3

Power supply

460V, 60Hz, 3-PH

Ground

Power supply

460V, 60Hz, 3-PH

Ground

* Disconnect switch (Field Supply)

* NOTE:

Disconnect Switch may be needed by the National/Local code.

NOTE

(1) See the section “4-2. Recommended Wire Length

and Wire Diameter for Power Supply System” for the

explanation of “A,” “B,” “C” and “D” in the above diagram.

(2) The basic connection diagram of the indoor unit shows

the 6P terminal board, so the terminal boards in your

equipment may differ from the diagram.

(3) Refrigerant Circuit (R.C.) address should be set before

turning the power on.

(4) Regarding the R.C. address setting, See the section “7-5.

Auto Address Setting”. Address setting can be executed

by remote controller automatically.

ALWAYS COMPLY WITH NATIONAL AND LOCAL CODE REQUIREMENTS.

3P terminal board

L2 L3L1

2P terminal board (×2)

(U-72ME2U9 / U-96ME2U9 /

U-120ME2U9 / U-144ME2U9)

U1 1U2 2

Inter-unit

control wiring

Inter-outdoor unit

control wiring

Outdoor Unit

4P terminal board

(U-72ME2U94 / U-96ME2U94 /

U-120ME2U94 / U-144ME2U94)

U1 U2

Inter-unit

control wiring

1 2

Inter-outdoor unit

control wiring

00_302411_EN.indd 29 2018/7/4 13:27:45

CAUTION

(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN67) from all outdoor

units except any one of the outdoor units. (When shipping: In shorted condition.)

For a system without link (no connection wiring between outdoor units), do not remove the short plug.

(2) Do not install the inter-unit control wiring in a way that forms a loop.

Outdoor unit

Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit

Outdoor unit Outdoor unit

Prohibited

(3) Do not install inter-unit control wiring such as star branch

wiring. Star branch wiring causes mis-address setting.

Outdoor unit Indoor unit Indoor unit

Indoor unit Indoor unit

Branch point

(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.

Outdoor unit

Central Controller

: Branch point

More than 7ft. (2m) required

Outdoor unit

Indoor unit

00_302411_EN.indd 30 2018/7/4 13:27:45

CAUTION

WARNING

Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, ensure that all wiring is tightly connected.

When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal” and fasten the wire securely with the fixing screw of the terminal board.

How to connect wiring to the terminal

For stranded wiring

(1) Cut the wire end with cutting pliers, then strip the insulation

to expose the stranded wiring approx. 3/8" (10mm) and tightly twist the wire ends.

(2) Using a Phillips head screwdriver, remove the terminal screw(s)

on the terminal board.

(3) Using a ring connector fastener or pliers, securely clamp each

stripped wire end with a ring pressure terminal.

(4) Place the ring pressure terminal, and replace and tighten the

removed terminal screw using a screwdriver.

Checking voltage of terminal board

Check if the wiring AC200V or more is connected to the inter-unit control wiring connection terminal board. First, turn off the power and then proceed the work.

If AC200V or higher voltage is mistakenly applied to the P.C. board, the fuse (FUSE3, 0.4A) of outdoor control P.C. board is broken and the P.C. board will be protected.

Special washer

Wire

Stranded wire

Strip 3/8" (10mm)

Screw

Ring pressure terminal

Terminal board

Wire

Ring pressure terminal

Screw and Special washer

Ring pressure terminal

U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9

In this case, reconnect the wires correctly and disconnect the 2P connector (BLU, OC, CN76) on P.C. board. Then, replace that connector with the 2P connector (BRN, EMG, CN69). Cut out the jumper (JP11).

U-72ME2U9 / U-96ME2U9

(CR-72ME2U9/A747841)

Jumper JP11

EMG, CN69 2P connector, BRN

OC, CN76 2P connector,

CN69CN76

BLU

Fuse FUSE3

JP11

EMG

FUSE3

U-120ME2U9 / U-144ME2U9

(CR-144ME2U9/A747593)

Jumper JP11

EMG, CN69 2P connector, BRN

JP11

CN69

OC, CN76 2P connector,

EMG

CN76

BLU

FUSE3

Fuse FUSE3

00_302411_EN.indd 31 2018/7/4 13:27:46

U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94

In this case, replace the pins 1 and 2 of the 2P connector (BRN, EMG, CN69) with the pins 2 and 3. Cut out the jumper (JP11).

Wiring sample

U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9

Type 72/96

Electronic component box

(CR-72ME2U94/ACXA73-03280)

Jumper JP11

EMG, CN69 2P connector, BRN

Fuse FUSE3

Type 120/144

Type 72/96

Inter-unit control wiring (U1, U2)

2P terminal board *

Inter-outdoor unit control wiring (1, 2)

2P terminal board *

Terminal board for power supply

3P terminal board *

Earth terminal *

Tightening torque

lbs.inch N · m

*1 11 *2 55 *3 73

3 1.25 0.25 2 6.2 0.2 4 8.2 0.4

Fit wires with cable clamps.

Type 120/144

Fit power supply and Inter-unit

control wires with cable clamps

respectively (field supply).

00_302411_EN.indd 32 2018/7/4 13:27:48

U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94

Type 72/96 Type 120/144

Electronic component box

Inter-unit control wiring (U1, U2)

4P terminal board *

Inter-outdoor unit control wiring (1, 2)

4P terminal board *

Terminal board for power supply

3P terminal board *

P.C. boardP.C. board

Earth terminal *

Tightening torque

lbs.inch N · m

*1 11 *2 55 *3 73

1 1.30 0.1 2 6.2 0.2 4 8.2 0.4

Fit wires with cable clamps.

Fit power supply and Inter-unit

control wires with cable clamps

respectively (field supply).

Hollow to cut out opening *

Unit: in. (mm)

ø1-3/4" (ø44) (Power supply wiring inserting port: knockout holes)

Wiring panel

ø1-3/8" (ø35) (Power supply wiring inserting port: knockout holes)

(Front)

ø7/8" (ø23) (Inter-unit control wiring inserting port: knockout holes)

Hollow to cut out opening *

ø1-3/8" (ø35) (Power supply wiring inserting port: knockout holes) ø7/8" (ø23) (Inter-unit control wiring inserting port: knockout holes)

Wiring panel

(Bottom)

ø1-3/4" (ø44) (Power supply wiring inserting port: knockout holes)

*4 ・ Hollow for jigsaw holes (Maximum allowed per hole is ø1-7/8" (ø48).) ・ Be sure to use waterproof conduit for electrical wiring to the outdoor unit. ・ Protective structure is necessary to avoid raindrops through wiring ports. ・ Hollow to cut out openings for wiring ports on the panel with a jigsaw.

00_302411_EN.indd 33 2018/7/4 13:27:49

5. HOW TO PROCESS TUBING

The liquid tubing side is connected by a flare nut, and the gas

tubing side is connected by brazing.

5-1. Connecting the Refrigerant Tubing

(3) Remove the flare nut from the unit and be sure to mount it

on the copper tube.

(4) Make a flare at the end of copper tube with a flare tool.

Use of the Flaring Method

Many of conventional split system air conditioners employ the

flaring method to connect refrigerant tubes which run between

indoor and outdoor units. In this method, the copper tubes are

flared at each end and connected with flare nuts.

Flaring Procedure with a Flare Tool

(1) Cut the copper tube to the required length with a tube cutter.

It is recommended to cut approx. 1 – 2 ft. (0.3 - 0.6m) longer than the tubing length you estimate.

(2) Remove burrs at the end of the copper tube with a tube

reamer or file. This process is important and should be done carefully to make a good flare.

Deburring

Before After

Flare nut

Copper

tubing

Flare tool

NOTE

A good flare should have the following characteristics:

inside surface is glossy and smooth

●

edge is smooth

●

tapered sides are of uniform length

●

NOTE

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube.

Copper

tubing

Reamer

00_302411_EN.indd 34 2018/7/4 13:27:49

Caution Before Connecting Tubes Tightly

(1) Apply a sealing cap or water-proof tape to prevent dust or water from entering the

tubes before they are used.

(2) Be sure to apply refrigerant lubricant to the matching surfaces of the flare and union

before connecting them together. This is effective for reducing gas leaks.

(3) For proper connection, align the union tube and flare tube straight with each other,

then screw in the flare nut lightly at first to obtain a smooth match.

Adjust the shape of the liquid tube using a tube bender at the installation site and

●

connect it to the liquid tubing side valve using a flare.

Cautions During Brazing

Replace air inside the tube with nitrogen gas to prevent copper oxide film

●

from forming during the brazing process. (Oxygen, carbon dioxide and Freon are not acceptable.)

Do not allow the tubing to get too hot during brazing.

●

The nitrogen gas inside the tubing may overheat, causing refrigerant system valves to become damaged. Therefore allow the tubing to cool when brazing.

Use a reducing valve for the nitrogen cylinder.

●

Do not use agents intended to prevent the formation of oxide film.

●

These agents adversely affect the refrigerant and refrigerant oil, and may cause damage or malfunctions.

5-2. Connecting Tubing Between Indoor and Outdoor Units

Apply refrigerant

lubricant

Union Flare nut

Torque wrench

Spanner

Indoor unit

Outdoor unit

(1) Tightly connect the indoor-side refrigerant tubing

extended from the wall with the outdoor-side

tubing.

(2) To fasten the flare nuts, apply specified torque as at right:

When removing the flare nuts from the tubing

●

connections, or when tightening them after connecting the tubing, be sure to use 2 adjustable wrenches or spanners

as shown.

If the flare nuts are over-tightened, the flare may be damaged, which could result refrigerant leakage and

cause in injury or asphyxiation to room occupants.

For the flare nuts at tubing connections, be sure to use

●

the flare nuts that were supplied with the unit, or else flare

Tube

diameter

in. (mm)

ø1/4

(ø6.35)

ø3/8

(ø9.52)

ø1/2

(ø12.7)

ø5/8

(ø15.88)

ø3/4

(ø19.05)

Tightening torque, approximate Tube thickness

lbs · in. N · m {kgf · cm} inch mm

120 – 160 14 – 18 {140 – 180} 0.025 0.635

300 – 360 34 – 42 {340 – 420} 0.030 0.762

430 – 610 49 – 61 {490 – 610} 0.035 0.889

590 – 710 67 – 81 {680 – 820} 0.040 1.016

870 – 1040 99 – 118 {1000 – 1200} 0.042 1.0668

nuts for R410A (type 2).

The refrigerant tubing that is used must be of the correct wall thickness as shown in the table at right.

Because the pressure is approximately 1.6 times higher than conventional refrigerant pressure, the use of ordinary flare nuts

(type 1) or thin-walled tubes may result in tube rupture, injury, or asphyxiation caused by refrigerant leakage.

In order to prevent damage to the flare caused by over-tightening of the flare nuts, use the table above as a guide when

●

tightening.

When tightening the flare nut on the liquid tube, use an adjustable wrench with a nominal handle length of 7-7/8" (200 mm).

●

00_302411_EN.indd 35 2018/7/4 13:27:50

5-3. Insulating the Refrigerant Tubing

CAUTION

5-4. Taping the Tubes

Tubing Insulation

Thermal insulation must be applied to all unit tubing, including

●

the distribution joint (purchased separately).

How to arrange 2 tubes (between outdoor unit and indoor unit)

Liquid tubing

Insulation

Gas tubing

How to arrange 3 tubes (between outdoor units)

Cosmetic (finishing) tape

Liquid tubing

Insulation

* For gas tubing, the insulation material must be heat resistant to

248°F (120°C) or above. For other tubing, it must be heat resistant to 176°F (80°C) or above.

Insulation material thickness must be 25/64" (10mm) or greater. If the conditions inside the ceiling exceed DB 86°F (30°C) and

RH 70%, increase the thickness of the gas tubing insulation material by 1 step.

If the exterior of the outdoor unit

CAUTION

valves has been finished with a square duct covering, make sure you allow sufficient space to use the valves and to allow the panels to be attached and removed.

Taping the flare nuts

Wind the white insulation tape around the flare nuts at the gas

tube connections. Then cover up the tubing connections with the flare insulator, and fill the gap at the union with the supplied black insulation tape. Finally, fasten the insulator at both ends with the supplied vinyl

clamps.

Sealer (supplied)

Insulation tape (white)

Gas tubing

Balance tubing

(supplied)

Flare insulator (supplied)

(1) At this time, the refrigerant tubes (and electrical wiring

if local codes permit) should be taped together with armoring tape in 1 bundle.

To prevent the condensation from overflowing the drain

pan, keep the drain hose separate from the refrigerant tubing.

(2) Wrap the armoring tape from the bottom of the outdoor

unit to the top of the tubing where it enters the wall. As you wrap the tubing, overlap half of each previous

tape turn.

(3) Clamp the tubing bundle to the wall, using 1 clamp

approx. each ft. (m).

Clamp

Insulated tubes

Drain hose

NOTE

Do not wind the armoring tape too tightly since this will decrease the heat insulation effect. Also ensure that the condensation drain hose splits away from

the bundle and drips clear of the unit and the tubing.

5-5. Finishing the Installation

After finishing insulating and taping over the tubing, use

sealing putty to seal off the hole in the wall to prevent rain and draft from entering.

Apply putty here

Unit side

insulator

Flare nut

Tube insulator

(not supplied) Heat resistant 248°F (120°C)

or above

Vinyl clamps (supplied)

Tubing

00_302411_EN.indd 36 2018/7/4 13:27:50

6. AIR PURGING

CAUTION

Air and moisture in the refrigerant system may have undesirable effects as indicated below.

pressure in the system rises

●

operating current rises

●

cooling (or heating) efficiency drops

●

moisture in the refrigerant circuit may freeze and block capillary tubing

●

water may lead to corrosion of parts in the refrigerant system

●

Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and

moisture from the system.

Air Purging with a Vacuum Pump (for Test Run) Preparation

Check that each tube (both liquid and gas tubes) between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed.

Remove the valve caps from all service valves on the outdoor unit.

Note that both liquid and gas tube service valves on the outdoor unit are kept

closed at this stage.

The balance tube leak test is not necessary if only 1 outdoor unit is installed.

Leak test

(1) With the service valves on the outdoor unit closed, remove the 5/16"

(7.94mm) flare nut and its bonnet on the gas tube service valve.

(Save for reuse.)

(2) Attach a manifold valve (with pressure gauges) and dry nitrogen gas

cylinder to this service port with charge hoses.

The balance tube leak test is not necessary if only 1 outdoor unit is

installed.

Use a manifold valve for air purging.

CAUTION

(3) Pressurize the system to no more than 484 psig (3.34MPa {33.1 kgf/cm

with dry nitrogen gas and close the cylinder valve when the gauge reading

reaches 484 psig (3.34MPa {33.1 kgf/cm Then, test for leaks with liquid soap.

CAUTION

If it is not available, use a stop valve for this purpose. The “Lo” knob of the manifold valve must always be kept closed.

G})

G}).

To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than the bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position.

Manifold gauge

Vacuum pump

Outlet Inlet

Manifold valve

Pressure gauge

Charge hose

Cylinder valve

Nitrogen gas cylinder (In vertical standing

position)

Open

Gas

tube

Open

Outdoor unit Liquid tube

Open

Balance tube

00_302411_EN.indd 37 2018/7/4 13:27:50

(4) Do a leak test of all joints of the tubing (both indoor and outdoor) and

all service valves.

Bubbles indicate a leak. Wipe off the soap with a clean cloth after a leak test.

(5) After the system is found to be free of leaks, relieve the nitrogen

pressure by loosening the charge hose connector at the nitrogen

cylinder.

When the system pressure is reduced to normal, disconnect the hose

from the cylinder.

Evacuation

(1) Attach the charge hose end described in the preceding steps to the

vacuum pump to evacuate the tubing and indoor unit. Confirm that the “Lo” knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with the tubing length and

capacity of the pump.

Evacuation is not necessary for the balance tube if only 1 outdoor unit

is installed.

Manifold valve

Vacuum gauge

Vacuum pump

Open

NOTE

The vacuum condition should be less than –14.7 psig (-0.1MPa)

{–755 mmHg, 5 Torr}.

(2) When the desired vacuum is reached, close the “Lo” knob of the

manifold valve and turn off the vacuum pump. Please confirm that the gauge pressure is under –14.7 psig (-0.1MPa)

{–755 mmHg, 5 Torr} after 4 to 5 minutes of vacuum pump operation.

Gas

tube

Liquid tube

Balance tube

Open

Outdoor unit

00_302411_EN.indd 38 2018/7/4 13:27:50

Charging additional refrigerant

CAUTION

Use a cylinder designed for use with

CAUTION

Charging additional refrigerant (calculated from the liquid

●

R410A respectively.

tube length as shown in Section “1-8. Additional Refrigerant

Charge”) using the liquid tube service valve.

Use a balance to measure the refrigerant accurately.

●

If the additional refrigerant charge amount cannot be charged

●

at once, charge the remaining refrigerant in liquid form by

using the gas tube service valve with the system in cooling

operation mode at the time of test run.

Finishing the job

Manifold valve

Pressure gauge

Valve

Liquid

R410A

(1) With a hex wrench, turn the liquid tube service valve stem

counter-clockwise to fully open the valve.

To avoid gas from leaking when

CAUTION

removing the charge hose, make sure the stem of the gas tube is turned all the way out (“BACK SEAT” position).

(2) Turn the gas tube service valve stem counter-clockwise to

fully open the valve.

(3) Loosen the charge hose connected to the gas tube service

port (5/16" (7.94mm)) slightly to release the pressure, then

remove the hose.

(4) Replace the 1/4" (6.35mm) flare nut and its bonnet on the

gas tube service port and fasten the flare nut securely with an adjustable wrench or box wrench. This process is very important to prevent gas from leaking

from the system.

(5) Replace the valve caps at both gas and liquid service valves

and fasten them securely.

This completes air purging with a vacuum pump. The air conditioner is now ready for a test run.

Gas

tube

Liquid tube

Balance tube

Open

Outdoor unit

Gas

tube

Liquid tube

Balance tube

Open

Outdoor unit

Open

00_302411_EN.indd 39 2018/7/4 13:27:51

7. TEST RUN

7-1. Preparing for Test Run

Before attempting to start the air conditioner, check the

●

following.

(1) All loose matter is removed from the cabinet especially

steel filings, bits of wire, and clips.

(2) The control wiring is correctly connected and all electrical

connections are tight.

(3) The protective spacers for the compressor used for

transportation have been removed.

If not, remove them now.

(4) The transportation pads for the indoor fan have been

removed. If not, remove them now.

(5) The power has been connected to the unit for at least

5 hours before starting the compressor. The bottom of

the compressor should be warm to the touch and the

crankcase heater around the feet of the compressor

should be hot to the touch.

(7) Request that the customer be present for the trial run.

Explain the contents of the instruction manual, then have

the customer actually operate the system.

(8) Be sure to give the instruction manual and warranty

certificate to the customer.

(9) When replacing the control PCB, be sure to make all the

same settings on the new PCB as were in use before

replacement.

The existing EEPROM is not changed, and is connected to

the new control PCB.

(Power must be turned ON at least 5 hours before

attempting test run)

Power mains switch

(6) Both the gas and liquid tube service valves are open.

If not, open them now.

Balance tube

Liquid tube

Gas tube

00_302411_EN.indd 40 2018/7/4 13:27:51

7-2. Test Run Procedure

Have outdoor sub units been connected?

Unit number setting switch

Number of outdoor units setting

Number of indoor units setting

System address setting switch

(SW5)

switch (SW6)

switch (SW3 and SW4)

(Check link wiring.)

(SW1 and SW2)

unit P.C.B is made link wiring more than 2 refrigerant

connected to a multiple refrigerant system?

If the terminating resistance pin on outdoor main

systems, set to OPEN side excepting the nearest

outdoor unit and the farthest outdoor unit from the

Recheck before the test run.

YES

Set outdoor unit address.

Set No. of outdoor units.

Set No. of indoor units.

Are indoor and outdoor control wires

*1 The unit set to 1

YES

System address setting

central controller.

becomes the outdoor

main unit.

CASE 1

Note: It is not necessary to control the terminating

resistance pin excepting the outdoor main unit.

Notes:

1. Use caution when making the settings. If there are duplicated system addresses, or if the settings for the number of indoor units are not consistent, an alarm will occur and the system will

not start.

2. These settings are not made on the indoor unit P.C.

board.

Is it possible to turn ON power only

for 1 refrigerant system where the

test run will be performed?

YES

CASE 2

YES

CASE 3.b

Is it OK to start the compressor?

Turn ON power to indoor and outdoor units.

Is auto address setting

performed in heating mode?

While COOL side of MODE pin (CN40) on

outdoor main unit P.C.B short circuited, short

circuit the A.ADD pin (CN30) on outdoor main

unit P.C.B for over 1 second long.

Cooling of indoor and outdoor units started.

LEDs 1 and 2 blink alternately.

Are LEDs 1 and 2 on

outdoor unit P.C.B OFF?

Is it OK to start the compressor?

Turn ON power to indoor and outdoor units.

Short circuit the A.ADD pin (CN30) on outdoor

main unit P.C. board for over 1 second long and

then open circuit.

Heating of indoor and outdoor units started.

LEDs 1 and 2 blink alternately.

CASE 3.a

YES

Test run preparation is completed. (Do not allow short-circuited pin to remain short-circuited.)

Make necessary

corrections.

Turn OFF power

to indoor and

outdoor units.

Check alarm

contents.

Make necessary

corrections.

Turn OFF power to

indoor and outdoor units.

Check alarm contents.

Turn ON power to indoor and outdoor

units only for that refrigerant system.

Short circuit the A.ADD pin (CN30)

on outdoor main unit P.C.B for over 1

second long and then open circuit.

LEDs 1 and 2 blink alternately.

(Approx. 2 - 3 minutes)

Are LEDs 1 and 2 on

outdoor unit P.C.B OFF?

YES

See the section “7-6. Setting Test Run Remote Controller.”

Set the remote controller to a test run.

Does system operate?

YES

Return remote controller

to normal mode.

Follow the section “7-8. Self-Diagnosis Function Table and Contents of Alarm

Display” and resolve the problem.

*2 At least 5 hours must have passed after the power ON to the outdoor unit.

*3 All indoor units operate in all refrigerant systems where the power is ON.

*4 See the section “7-8. Self-Diagnosis Function Table and Contents of Alarm

Display”.

End test run.

00_302411_EN.indd 41 2018/7/4 13:27:51

7-3. Main Outdoor Unit PCB Setting

U-72ME2U9 / U-96ME2U9

Terminating resistance pin

SHORT OPEN

CN67

CN73

SW6 CN23 CN34

SW5

SW4

OFFONOFF

O/U. ADD

SW6SW5

NO. OF O/U

CN24

OFF

NO. OF I / U

OFF

CN33

COOL

A. ADD

SW1SW2SW3SW4

R. C. ADD

CN27SW3

CN28

CN30

CN40

HEAT

MODE

SW2

CR-72MF2U9 / A748186

SW1

U-120ME2U9 / U-144ME2U9

SW6 SW3 SW1 CN28 CN24

Terminating resistance pin

SW5 SW4 SW2 CN23 CN30CN27CN73

CN40

MODE

COOLHEAT

R. C. ADD

SW2

SW3

OFF

SW1

CR-144MF2U9 / A748187

SHORT OPEN

CN67

O/U. ADD

OFFONOFF

NO. OF O/U

SW6SW5

NO. OF I / U

SW4

OFF

A. ADD

CN40CN30

CN33

CN34

00_302411_EN.indd 42 2018/7/4 13:27:51

CN73

U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94

Terminating resistance pin

CN34

CN33

SW5

SW6

SW4 SW3

SW2 SW1

CN24

CN23

CN40

CN30

CN28

CN27

00_302411_EN.indd 43 2018/7/4 13:27:56

<Sample> Outdoor unit number setting (SW5)

1 2

●

Unit number setting

Unit number setting (SW5)

(3P Dip switch, blue)

Unit 1 (at shipment) 1: ON

Unit 2 2: ON

Unit 3 1 & 2: ON

<Sample> Setting number of outdoor units (SW6)

●

Number of outdoor units

Setting number of units (SW6)

(3P Dip switch, blue)

1 unit (at shipment) 1: ON

2 units 2: ON

3 units 1 & 2: ON

<Sample> Setting number of indoor units (SW4, SW3)

●

Setting number of units (SW4)

Number of indoor units

(3P Dip switch, blue)

10 2030

1 unit (at shipment) All: OFF

11 units 1: ON

21 units 2: ON

31 units 3: ON

40 units 1 & 3: ON

58 units 2 & 3: ON

64 units All: ON

OFF

Notes:

(1) Unit 1 (outdoor main unit) needs to prepare the settings

of “number of outdoor units”, “number of indoor units” and “system address”.

(2) These settings are not required excepting the unit 1

outdoor unit.

Setting number of units (SW3)

(Rotary switch, red)

Set to 1

Set to 0

Set to 8

Set to 4

<Sample> Setting system address (Necessary when link wiring established.) (SW2, SW1)

●

System address number

1 system (at shipment)

11 systems

21 systems

30 systems

System address (SW2)

(2P Dip switch, black)

10 20

Both: OFF

1: ON

2: ON

1 & 2: ON

OFF

System address (SW1)

(Rotary switch, black)

Set to 1

Set to 0

00_302411_EN.indd 44 2018/7/4 13:27:58

7-4. Function Switches on P.C. Board

Function Switch Remarks

Changes to cooling/heating mode. (outdoor main unit is only usable.) When in normal operation: When short circuited the COOL side, indoor unit operation in the same

MODE pin (3P, BLK)

(CN40)

When in auto address setting: Changes to heating mode with open-circuit.

refrigerant system changes to all cooling mode.

When short circuited the HEAT side, indoor unit operation in the same

refrigerant system changes to all heating mode.

A.ADD pin (2P, WHT)

(CN30)

CHK pin (2P, WHT)

(CN23)

RC plug (3P, BLU)

(CN73)

RUN pin (2P, WHT)

(CN27)

STOP pin (2P, WHT)

(CN28)

AP pin (2P, WHT)

(CN24)

SNOW plug (3P, RED)

(CN34)

SILENT plug (2P, WHT)

(CN33)

Short circuited for over 1 second long

If short circuit lasts for over 1 second long during auto address setting, the setting is interrupted.

When short circuited, test run begins. (If the remote controller is connected in test run mode, it is automatically cancelled after 1 hour.) Also, if short-circuit is cancelled, test run mode is cancelled.

Connects to outdoor unit maintenance remote controller and content of alarm message will be checked.

When short circuited and pulse signal is given, all indoor units operate in the same refrigerant system.

When short circuited and pulse signal is given, all indoor units stop in the same refrigerant system. (When short circuited, operation cannot be performed by the indoor unit's remote controller.)

Can be used when vacuuming the outdoor unit.

Can be used when installing a snowfall sensor device.

Can be used when setting the outdoor unit fan in sound absorbing mode.

For details, refer to Test Run Service Manual.

Auto address setting starts with open-circuit.

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123

231

7-5. Auto Address Setting

Example: Basic Wiring Diagram (1)

• Caseofnolinkwiring (Inter-unit control wiring is not connected to a multiple system.)

Indoor unit address setting is possible without starting the compressor.

Unit 1 setting (outdoor main unit)

System address

(System 1 setting)

(SW1)

(SW2)

(SW6)

OFF

Unit

number

setting

OFF

(unit 1)

Unit 1

(Main)

Number of

outdoor units (3 units setting)

Outdoor Unit

No. of indoor units

(10 units setting)

(SW3)

(SW4)

OFF

(SW5)

213

OFF

Set the terminating resistance pin

to SHORT side. (CN67)

Inter-outdoor unit

control wiring

Inter-unit control wiring

* It is not necessary to control the terminating

resistance pin (3P) (CN67) on the outdoor unit P.C. board. 3P pin is plugged in SHORT side at shipment. Confirm it is plugged in SHORT side.

Unit 2 setting Unit 3 setting

Unit

number

setting (unit 2)

(SW5) (SW5)

OFF OFF

Unit 2

(Sub)

Inter-outdoor unit

control wiring

Unit

number

setting (unit 3)

Unit 3

(Sub)

3P terminating

resistance pin

(SHORT side)

OPENSHORT

Indoor unit

Remote controller

1-1 1-2 1-3 1-10

Remote control communication wiring

Case 1

Auto Address Control from Outdoor Unit

1. Regarding the number of outdoor units, set the Dip switch (SW6) for setting the number of outdoor units on Unit 1 control P.C.B to 3

units

and the Unit Number Setting Dip switch (SW5) to unit number 1.

OFF

This unit becomes the outdoor main unit.

2. Set the Unit Number Setting switch (SW5) on unit 2 control P.C. board to unit number 2.

Set the Unit Number Setting switch (SW5) on unit 3 control P.C. board to unit number 3.

3. Check the refrigerant system's Address Setting Rotary switch (SW1) on outdoor main unit control P.C. board to “1” and the Dip switch

(SW2) to “0” (at shipment).

OFF

4. Regarding the setting of the number of indoor units connected to the outdoor unit, set the Dip switch (SW4) for setting the number of

indoor units on outdoor main unit control P.C. board connected to the outdoor unit to “1”.

231

OFF

If the Rotary switch (SW3) set to “0”, 10 units can be prepared for operation.

5. Turn on power to indoor and outdoor units.

6. Short circuit the A.ADD pin (CN30) on outdoor main unit control P.C. board for over 1 second long and open circuit.

Communication for auto address setting begins.

* To cancel, short circuit the A.ADD pin (CN30) again for over 1 second long and then open circuit. The LED that

indicates auto address setting goes out and the process is stopped.

Be sure to perform auto address setting again.

Auto address setting is completed when LEDs 1 and 2 on outdoor main unit control P.C. board go out.

7. Remote control operation is now available. * When auto address setting is controlled by the remote controller, perform auto address setting by the remote controller after step 5

described above.

See to section “Auto Address Setting from Remote Controller”.

●

00_302411_EN.indd 46 2018/7/4 13:27:58

Example: Basic Wiring Diagram (2)

• Caseoflinkwiring

No. 1 refrigerant system

Unit 1 setting (outdoor main unit)

System address

(System 1 setting)

(SW1) (SW2)

Number of

outdoor units (3 units setting)

Central Controller

Inter-unit

control wiring

OFF

(SW6)

Outdoor unit

system 1

Indoor unit

OFF

* See the section “ATTENTION!”.

No. of indoor units

(13 units setting)

(SW3)

(SW4)

Unit

number

setting (unit 1)

OFF

(SW5)

213

OFF

Unit

number

setting (unit 2)

Set the terminating

Unit 1

(Main)

resistance pin to

SHORT side. (CN67)

Inter-outdoor unit

control wiring

Inter-unit control wiring

1-1 1-2 1-131-3

Unit 2 setting

(SW5)

Unit 2

(Sub)

Setting of terminal pin (CN67)

Refrigerant circuit No. 1

Unit No. 1 (Main) : short-circuit (at shipment) Unit No. 2 (Sub) : short-circuit (at shipment) Unit No. 3 (Sub) : short-circuit (at shipment)

Refrigerant circuit No. 2 to z-1

Unit No. 1 (Main) : open-circuit Unit No. 2 (Sub) : short-circuit (at shipment)

Refrigerant circuit No. z

Unit No. 1 (Main) : short-circuit (at shipment) Unit No. 2 (Sub) : short-circuit (at shipment)

Unit 3 setting

OFF

Unit

number

setting (unit 3)

(SW5)

Unit 3

(Sub)

Inter-outdoor unit

control wiring

OFF

No. 2 refrigerant system

No. z refrigerant system

Remote Controller

Unit 1 setting (outdoor main unit)

System address

(System 2 setting)

(SW1) (SW2)

OFF

Number of

outdoor units (2 units setting)

(SW6)

OFF

Outdoor unit

system 2

Indoor unit

Remote

Controller

Remote control communication wiring

Number of indoor units

(9 units setting)

(SW3)

Unit 1

(Main)

(SW4)

Unit

number

setting (unit 1)

213

OFF

(SW5)

213

OFF

Set the terminating resistance pin to

OPEN side. (CN67)

Unit

number

setting (unit 2)

Unit 2 setting

(SW5)

123

Unit 2

(Sub)

OFF

Inter-outdoor unit control wiring

Inter-unit control wiring

2-1 2-2 2-9

Remote control communication wiring

Set the terminating resistance pin to

SHORT side. (CN67)

Unit 2

(Sub)

Inter-unit

Outdoor unit system z

Unit 1

(Main)

control wiring

Inter-unit control wiring

Inter-outdoor unit control wiring

To z refrigerant system indoor unit

00_302411_EN.indd 47 2018/7/4 13:27:58

231

123

● Final check before operation

Final check must be done under the conditions of inter-outdoor unit control wiring

connected to the centralized control system and the resistor between conductors must be measured by a Megger. Check if it is showing between 30Ω and 120Ω.

If the resistance value is out of range, check adjustment of the termination resistor again.

Even if it is out of range, the problem is caused by wiring.

• Is the wiring connection properly completed?

• Are there any scratches or deterioration on the coverage?

• Measure between conductors and also between wiring and ground by 500V Megger

insulation resistance tester.

Make sure the Megger is showing more than 100MΩ. When measuring, remove both ends of the wiring from the terminal board. If not removed, it will be damaged. If it is less than 100MΩ, a new wiring connection should be made.

Make settings according to each case as described below.

●

• In case of possibility of turning ON power to indoor/outdoor units for each refrigerant system

• In case of impossibility of turning ON power to indoor/outdoor units for each refrigerant system

Auto address setting in heating mode Auto address setting in cooling mode

Case 2

In case of possibility of turning ON power to indoor/outdoor units for each refrigerant system:

●

In case of possibility of turning ON power to indoor/outdoor units for each refrigerant system:

Indoor unit address setting can be made without starting the compressor.

How to control auto address setting from outdoor unit

1. Set the unit number setting switch (SW5) on unit 1 (outdoor main unit) control P.C. board to:

Between conductors

Wire

Between wiring and ground

Wire

Ground Ground

Case 2

Case 3.a

Case 3.b

(Unit 1: This unit becomes to the outdoor main unit.)

Set the unit number setting switch (SW5) on unit 2 control P.C. board to:

Set the unit number setting switch (SW5) on unit 3 control P.C. board to:

2. Regarding the number of outdoor units, set the Dip switch (SW6) for setting the number of outdoor units on outdoor main unit

control P.C. board to 3 units.

OFF

3. Check that the refrigerant system address Rotary switch (SW1) on outdoor main unit control P.C. board in 1 refrigerant system is

set to “1” and the Dip switch (SW2) is set to “0” (at shipment).

OFF

4. Regarding the number of indoor units connected to the outdoor unit, set the Dip switch (SW4) for setting the number on indoor

units on outdoor main unit control P.C. board to “1”

and set the Rotary switch (SW3) to “3”.

OFF

Total of 13 units installation are made.

5. Turn ON power to all indoor and outdoor units in one refrigerant system.

6. Short circuit the A.ADD pin (CN30) of outdoor main unit for over 1 second long and then open circuit. (Communication for auto address setting begins.)

* To cancel, again short circuit the A.ADD pin (CN30) for over 1 second long and then open circuit.

LEDs 1 and 2 that indicate auto address setting is in progress go out and that process is stopped.

Be sure to perform auto address setting again.

(Auto address setting is completed when the compressor stops and LEDs 1 and 2 on outdoor main unit control P.C. board go out.)

7. Turn ON power to indoor and outdoor units only for another refrigerant system and repeat steps 1 to 5 described above.

Complete auto address setting for each refrigerant system.

8. Remote control operation is now available. * When performing auto address setting by the remote controller, perform auto address setting by the remote controller after

step 5.

Refer to section “Auto Address Setting by Remote Controller.”

●

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Case 3.a

In case of impossibility of turning ON power to indoor/outdoor units in each refrigerant system:

●

(Auto address setting in heating mode)

Indoor unit auto address setting cannot be made unless the compressor is started.

How to control automatic address from outdoor unit

Case 2

1. Make all settings following the same procedure described under steps 1 to 4 in

5. Turn ON power to all indoor and outdoor units in all refrigerant systems.

6. If you wish to make auto address setting in

heating mode

, short circuit the A.ADD pin (CN30) on outdoor main unit control

P.C. board for the desired auto address setting in a refrigerant system for over 1 second long and then open circuit.

(Be sure to make settings in each refrigerant system. It is impossible to perform auto address setting in a multiple refrigerant

system simultaneously.)

(Communication for auto address setting begins and the compressor is started and auto address setting in heating mode begins.) (All indoor units can also be operated.)

* To cancel, again short circuit the A.ADD pin (CN30) for over 1 second long and then open circuit.

LEDs 1 and 2 that indicate auto address setting is in progress go out and that process is stopped.

Be sure to perform auto address setting again.

(Auto address setting is completed when the compressor stops and LEDs 1 and 2 on outdoor main unit control P.C. board go

out.)

7. Short circuit the A.ADD pin (CN30) on outdoor main unit in another refrigerant system for over 1 second long and then open

circuit.

(Repeat the same procedure and complete auto address setting.)

8. Remote control operation is now available. * When installing auto address setting by the remote controller, control auto address setting by the remote controller after step 5.

Refer to section “Auto Address Setting by Remote Controller.”

●

00_302411_EN.indd 49 2018/7/4 13:27:59

Case 3.b

In case of impossibility of turning ON power to indoor/outdoor units in each refrigerant system:

●

(Automatic address setting in cooling mode)

The indoor unit auto address setting cannot be made unless the compressor is started.

How to control automatic address from outdoor unit

Case 2

1. Make all settings following the same procedure described under steps 1 to 4 of

5. Turn ON power to all indoor and outdoor units in all refrigerant systems.

6. If you wish to make auto address setting in

cooling mode

, while short circuiting COOL side of the MODE pin (CN40) on

outdoor main unit control P.C. board for the desired auto address setting, short circuit the A.ADD pin (CN30) for over 1 second

long and then open circuit.

(Be sure to install address settings in each refrigerant system. It is impossible to perform auto address setting in a multiple

refrigerant system simultaneously.)

(Communication for auto address setting begins and the compressor starts and auto address setting in cooling mode begins.) (All indoor units can also be operated.)

* To cancel, again short circuit the A.ADD pin (CN30) for over 1 second long and then open circuit.

LEDs 1 and 2 that indicate auto address setting is in progress go out and that process is stopped.

Be sure to perform auto address setting again.

(Auto address setting is completed when the compressor stops and LEDs 1 and 2 on outdoor main unit control P.C. board go

out.)

7. Short circuit the A.ADD pin (CN30) on outdoor main unit in another refrigerant system for over 1 second long. Then, open circuit.

(Repeat the same procedure and complete auto address setting.)

8. Remote control operation is now available.

* It is impossible to perform auto address setting in cooling mode by the remote controller.

00_302411_EN.indd 50 2018/7/4 13:27:59

Auto Address Setting from the High-spec Wired Remote Controller (CZ-RTC5A)

Keep pressing the

simultaneously for 4 or more seconds.

and

buttons

The “Maintenance func” screen appears on the LCD

display.

Press the

button to see each menu.

If you wish to see the next screen instantly, press the

button.

Select “9. Auto address” on the LCD display and

press the

The “Auto address” screen appears on the LCD

9. Auto address

10. Set elec. consumption

11. Set touch key

12. Check touch key Sel. Page [ ] Confirm

button.

Maintenance func

20:30 (THU)

display.

Change the “Code no.” to “A1” by pressing the or button.

Auto address

Code no. O/D unit no.

Sel. Next

20:30 (THU)

[ ]

START

CZ-RTC5A

Select the “O/D unit no.” by pressing the

button.

Select one of the “O/D unit no.” for auto address by

pressing the

button.

Approximately about 10 minutes are required. When auto address setting is completed, the units

return to normal stopped status.

Auto Address Setting* from the Remote Controller (CZ-RTC4)

* Auto address setting in Cooling mode cannot be done from the remote controller.

N OT E

Selecting each refrigerant system individually for auto address setting

●

Auto address setting for each system: Item code “A1”

●

Press and hold the remote controller timer time

button

and button simultaneously for 4 seconds or longer.

Next, press either the temperature setting

button.

Check that the item code is “A1”.

Use either the

button to set the system No. to perform

auto address setting.

Then press the

button.

Auto address setting for one refrigerant system begins.

When auto address setting for one system is completed,

the system returns to normal stopped status.

During auto address setting, “

” is displayed on

the remote controller. This message disappears when auto address setting is completed.

Repeat the same steps to perform auto address setting for

each successive system.

00_302411_EN.indd 51 2018/7/4 13:28:00

CZ-RTC4

Display During Auto Address Setting

On the surface of outdoor unit control P.C. board

●

LED

* Do not short circuit the A.ADD pin (CN30) again during auto address setting.

LEDs 1 and 2 go out and address setting is interrupted.

* When auto address setting is normally completed, both LEDs 1 and 2 go out.

Blinks alternately

Contents of LEDs 1 and 2 on outdoor unit control P.C. board

●

In other cases, correct settings referring to the following table and perform auto address setting again.

: Illuminating : Blinking

: Go out

LED 1 LED 2 Contents of display

After turned ON power (not during auto address setting), it is entirely impossible to communicate with

the indoor unit in the system.

After turned ON power (not during auto address setting), although the indoor units more than 1 unit in the system are recognized, there are inconsistencies between the number of indoor units and setting number of indoor units.

Alternately

Under auto address setting

Auto address setting completed

There are inconsistencies between the number of indoor units and setting number of indoor units.

Simultaneously

Alternating

Display of remote controller

●

(at the time of auto address setting)

See the section “7-8. Self-Diagnosis Function Table and Contents of Alarm Display”.

CZ-RTC5A CZ-RTC4

Auto address

Assigning

Cancel

Blinking “ ” indicator

Request concerning recording the indoor/outdoor unit combination Nos.

After auto address setting has been completed, be sure to record them for future reference. List the outdoor main unit system address and the addresses of the indoor units in that system in an easily visible location (next to the nameplate), using a permanent marking pen or similar means that cannot be abraded easily. Example: (Outdoor) 1 - (Indoor) 1-1, 1-2, 1-3… (Outdoor) 2 - (Indoor) 2-1, 2-2, 2-3… These numbers are necessary for later maintenance. Please be sure to indicate them.

00_302411_EN.indd 52 2018/7/4 13:28:01

Checking the indoor unit addresses

Use the remote controller to check the indoor unit address.

CZ-RTC5A (High-spec wired remote controller)

Keep pressing the

simultaneously for 4 or more seconds.

and

buttons

The “Maintenance func” screen appears on the LCD

display.

The “Simple settings” screen appears on the LCD

display.

Select the “Unit no.” by pressing the

button for changes.

Press the

Maintenance func

1. Outdoor unit error data

2. Service contact

3. RC setting mode

4.Test run Sel. Page [ ] Confirm

20:30 (THU)

button to see each menu.

If you wish to see the next screen instantly, press the

button.

Select “7. Simple settings” on the LCD display and

press the

button.

Maintenance func

5. Sensor info.

6. Servicing check

7. Simple settings

8. Detailed settings Sel. Page [ ] Confirm

20:30 (THU)

Simple settings

Unit no. Code no. Set data

3-1 0001

Sel. Next

20:30 (THU)

The indoor unit fan operates only at the selected indoor unit.

20:30 (THU)

[ ]

START

CZ-RTC5A

CZ-RTC4 (Timer remote controller)

1. Press and hold the seconds or longer (simple settings mode).

2. The address is displayed for the indoor unit that is connected to the remote controller.

Only the address of the indoor unit that is connected to the

remote controller can be checked.

3. Press the controller mode.

1. Press and hold the seconds or longer (simple settings mode).

2. “ALL” is displayed on the remote controller.

3. Next, press the

4. The address is displayed for 1 of the indoor units which is

connected to the remote controller. Check that the fan of that

indoor unit starts and that air is discharged.

5. Press the

each indoor unit in sequence.

6. Press the mode.

button again to return to normal remote

again to return to normal remote controller

button and button for 4

button.

button again and check the address of

Number changes to

indicate which indoor unit is currently selected.

Indoor unit address

Number changes

to indicate which indoor unit is currently selected.

Indoor unit address

00_302411_EN.indd 53 2018/7/4 13:28:02

7-6. Setting Test Run Remote Controller

CZ-RTC5A (High-spec wired remote controller)

Keep pressing the

buttons simultaneously for 4 or more seconds.

and

The “Maintenance func” screen appears on the

LCD display.

20:30 (THU)

[ ]

START

Maintenance func

1. Outdoor unit error data

2. Service contact

3. RC setting mode

4.Test run Sel. Page [ ] Confirm

Press the or button to see each menu.

20:30 (THU)

If you wish to see the next screen instantly, press

the

button.

Select “4. Test run” on the LCD display and press

the

button.

Maintenance func

1. Outdoor unit error data

2. Service contact

3. RC setting mode

4.Test run

Sel. Page [ ] Confirm

20:30 (THU)

Change the display from OFF to ON by pressing the or button. Then press the

button.

Test run

20:30 (THU)

CZ-RTC5A

Press the

button. “TEST” will be displayed

on the LCD display.

20:30 (THU)

TEST

START[ ]

Press the

button. Test run will be started.

Test run setting mode screen appears on the LCD

display.

20:30 (THU)

TEST

MODE

COOL

Change

CZ-RTC4 (Timer remote controller)

1. Press the remote controller

Then press the

“

●

2. The test run can be performed using the HEAT, COOL, or FAN

3. If correct operation is not possible, a code is displayed on the remote

4. After the test run is completed, press the

” appears on the LCD display while the test run is in progress.

The temperature cannot be adjusted when in Test Run mode.

This mode places a heavy load on the machines.

Therefore, use it only when performing the test run.

operation modes.

N OT E

The outdoor units will not operate for approximately 3 minutes after the

power is turned ON and after operation is stopped.

controller LCD display.

See the section “7-8. Self-Diagnosis Function Table and Contents of Alarm Display” and correct the problem.

Check that “ To prevent continuous test runs, this remote controller includes a timer

function that cancels the test run after 60 minutes.

* If the test run is performed using the wired remote controller, operation

is possible even if the cassette-type ceiling panel has not been installed. (“P09” display does not occur.)

[ ] Confirm

button for 4 seconds or longer.

button.

button again.

” disappears from the LCD display.

CZ-RTC4

00_302411_EN.indd 54 2018/7/4 13:28:03

7-7. Caution for Pump Down

CAUTION

Pump down means refrigerant gas in the system is returned to the outdoor unit.

Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit.

Refer to Service Manual.

This outdoor unit cannot collect more than the rated refrigerant amount as shown by the

CAUTION

●

nameplate on the back.

If the amount of refrigerant is more than that recommended, do not conduct pump down.

●

In this case use another refrigerant collecting system.

7-8. Self-Diagnosis Function Table and Contents of Alarm Display

How to know LEDs 1 and 2 alarm display on outdoor unit control P.C. board

LED 1 LED 2 Contents of Alarm Display

Alarm display

Alternating

After LED1 blinks M times, LED2 blinks N times. This will be repeated.

Times of blinks Type of alarm

2 P Alarm 3 H Alarm

4 E Alarm 5 F Alarm 6 L Alarm

N = Times of alarm No.

For example: After LED1 blinks twice, LED2 blinks 17 times. This will be repeated.

The alarm shows “P17”.

: Blink) Connect the outdoor unit maintenance remote controller to the RC plug (3P, BLU) on outdoor main unit control

(

P.C. board and make confirmation.

Self-Diagnosis Function Table

• Cause and countermeasure against the symptom of auto address failure

Symptom Cause and countermeasure

• When turning ON power to the outdoor main unit, LEDs 1 and 2 illuminate or blink excluding going out. Auto address setting is not available.

• When auto address setting by the remote controller begins,

the alarm display appears immediately.

• When auto address setting by the remote controller begins,

no display appears.

• Auto address setting begins but finishes improperly.

Symptom Cause and countermeasure

• Soon after a few seconds or after a few minutes, the alarm content is displayed on the remote controller.

See “Contents of Alarm Display” and make corrections.

Are remote control wiring and inter-unit control wiring

connected properly? Is indoor unit turned ON power?

See “Contents of Alarm Display” and make a correction.

• After a few minutes when auto address setting begins, the

compressor may occasionally start and stop several times.

LEDs 1 and 2 on outdoor unit control P.C. board show the display of auto address setting with blinking alternately but LEDs 1 and 2 do not indicate the completion of auto

address setting (go out).

00_302411_EN.indd 55 2018/7/4 13:28:03

Are remote control wiring and inter-unit control wiring

connected properly? Is indoor unit turned ON power?

• If the alarm display “E15”, “E16” and “E20” appear after auto address setting began, check the following items.

Alarm display Alarm contents

E15

E16

E20

Have you forgotten to turn ON power to indoor unit?

Are indoor and outdoor control wiring connected properly? (Check for incorrect wiring to open & short-circuit, terminal pin and remote control terminal.)

Is remote control wiring connected properly? (Check for open & short-circuit, wrong connection to indoor/outdoor unit control wiring terminal, inter-unit control wiring.)

Are the number of the connecting indoor units set by SW3 and SW4 of outdoor main unit control P.C. board connected properly?

Is additional appropriate amount of refrigerant charge? (Compressor ON at the time of auto address setting)

Is the refrigerant tubing connected properly? (Compressor ON at the time of auto address setting)

Are E1 and E3 sensors of indoor unit normal? (Compressor ON at the time of auto address setting)

Are there any wrong system address installed in indoor units caused by manual or incorrect auto address control?

1) When auto address setting from outdoor main unit control P.C. board or remote controller begins, “Under Setting” appears on the

remote controller as for normal indoor units under the inter-unit control wirings and remote control wirings.

LEDs 1 and 2 indicators on outdoor main unit control P.C. board blink alternately.

2) If there is an error at the inter-unit control wiring of the remote controller when in the indoor unit group control, address setting may not occasionally be made although “under setting” is displayed.

3) Although the alarm “E15” and “E16” are displayed, addresses will be installed in the recognized indoor units. The installed addresses can be checked by the remote controller. See the section “Checking the indoor unit address”.

• When operating the remote controller after auto address setting completed (LEDs 1 and 2 indicators on outdoor main unit control

P.C. board go out), correct the symptom if the following alarms appear on the remote controller.

Remote control display

No display

If any other alarm appear on the display, refer to the Test Run Service Manual.

Recognized number of indoor units at the time of auto address setting are fewer than that of indoor units set by SW3 and SW4 on outdoor main unit P.C. board.

Recognized number of indoor units at the time of auto address setting are more than that of indoor units set by SW3 and SW4 on outdoor main unit P.C. board.

Outdoor unit could not entirely receive serial communication signal from the indoor unit within 90 seconds after auto address setting began.

Check E15 E16 E20

 

  

 



 



Cause

Remote controller is not connected properly. (Power failure)

When auto address setting was completed, the power of indoor unit was turned off. Indoor unit does not respond to remote controller.

E01

E02

P09 Connection to the panel of indoor unit is not good.

Indoor unit address was mistakenly controlled by undesired indoor unit remote controller. (Impossible to communicate with outdoor unit)

The remote controller is having error in sending serial communication signal.

(Impossible to communicate with indoor unit by remote controller)



• Alarm display can be checked by the outdoor maintenance remote controller. When operating, refer to the Test Run Service

Manual.

Alarm display can also be checked by number of blinking of LEDs 1 and 2 on outdoor unit control P.C. board. See the section “How to know LEDs 1 and 2 alarm display on outdoor unit control P.C. board” under the section “7-8. SelfDiagnosis Function Table and Contents of Alarm Display”.

Remote control display Alarm contents

E01 Indoor unit does not respond to remote controller. E02 The remote controller is having error in sending serial communication signal. E03 Controller does not respond to indoor unit. E04 Oudoor unit does not respond to indoor unit. E06 Some indoor units does not respond to outdoor unit. E08 Indoor unit address is dupulicating.

00_302411_EN.indd 56 2018/7/4 13:28:03

Remote control display Alarm contents

E09 Two or more remote controllers are set as main on R1-R2 link. E12 Auto Address failed to start. E14 Two or more indoor units are set as main, in the group controlled indoor units. E15 Fewer indoor units are found in Auto Addressing than the setting on outdoor PCB. E16 More indoor units are found in Auto Addressing than the setting on outdoor PCB. E18 No response from sub indoor to the main indoor unit in group control wiring. E20 No indoor unit responded in Auto Addressing. E24 No response from sub outdoor unit. E25 The outdoor unit address is duplicating. E26 The number of responding outdoor units does not match with the setting on the main outdoor unit. E27 Improper wiring between main and sub outdoor units. E29 No response from main outdoor unit. E30

The outdoor unit is having error in sending serial communication signal on main-sub communication line.

E31 Error in communication inside outdoor unit control box. F01 E1 thermistor on liquid side of indoor heat exchanger has failure. (E1) F02 Indoor unit set as single split. (E2) F03 E3 thermistor on gas side of indoor heat exchanger has failure. (E3) F04 DISCH1 thermistor at the discharge of 1st compressor reading is abnormal. F05 DISCH2 thermistor at the discharge of 2nd compressor reading is abnormal. F06 EXG1 thermistor at the gas side of 1st heat exchanger of the outdoor unit has failure. (EXG1) F07 EXL1 thermistor at the liquid side of 1st heat exchanger of the outdoor unit has failure. (EXL1) F08 TO thermistor for outdoor ambient air temperature has failure. (TO) F10 TA thermistor for intake air temperature (room temperature) of the indoor unit has failure. (TA) F11 BL thermistor for supply air temperature of the indoor unit has failure. (BL) F12 SCT thermistor at the suction refrigerant of compressors has failure. (SCT) F14 SCG thermistor at the outlet of subcooling heat exchanger in outdoor unit has failure. (SCG) F16 High pressure sensor of the outdoor unit has failure. (HPS) F17 Low pressure sensor of the outdoor unit has failure. (LPS) F23 EXG2 thermistor at the gas side of 2nd heat exchanger of the outdoor unit has failure. (EXG2) F24 EXL2 thermistor at the liquid side of 2nd heat exchanger of the outdoor unit has failure. (EXL2) F29 EEPROM on indoor unit PCB has failure. F31 EEPROM on outdoor unit PCB has failure.

H01 Overcurrent in 1st compressor. H03 Current sensor for the 1st compressor is disconnected or shorted. H05

DISCH1 thermistor at the discharge of 1st compressor is disconnected, shorted or misplaced. (DISCH1)

H06 Low pressure is too low. H07 Low on oil or the oil recovery circuit has restriction. H08 OIL1 thermistor for the oil of 1st compressor has failure. (OIL1) H11 Overcurrent in 2nd compressor. H13 Current sensor for the 2nd compressor is disconnected or shorted. H15

DISCH2 thermistor at the discharge of 2nd compressor is disconnected, shorted or misplaced. (DISCH2)

H21 HIC for 2nd compressor has failure. Overcurrent or overheat of HIC. H27 OIL2 thermistor for the oil of 2nd compressor has failure. (OIL2) H31 HIC for 1st compressor has failure. Overcurrent or overheat of HIC.

L01 Indoor unit address setting has error. (No main indoor unit in group control.) L02 Indoor unit model does not match with the outdoor unit model. (Multi-split/mini-split) L03 Two or more indoor units are set as main in group control. L04 Duplicate system address setting on outdoor units. L05 Two or more indoor units are set as priority indoor unit. L06 Two or more indoor units are set as priority indoor unit. L07 Group control wiring is detected for indoor unit set as individual control. L08 Indoor unit address is not set. L09 Capacity setting of indoor unit is not correct. L10 Capacity setting of outdoor unit is not correct. L13 Indoor unit model does not match with outdoor unit. L17 Model mismatch between outdoor units in one refrigerant circuit. L18 Reversing valve or solenoid valve failure. P01 Indoor fan motor activated thermal protector. P03 1st compressor discharge temperature too high.

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Remote control display Alarm contents

P04

Protection device activated. High pressure switch (63PH, 63PH1 or 63PH2) or compressor thermal

protector (49C1 / 49C2).

P05 Missing phase in power input is detected at HIC for 1st compressor. P09 Connection to the panel of indoor unit is not good. P10 Float switch of drain pan safety is activated. P11 Drain pump failure or locked rotor. P12 Indoor fan inverter protection control is activated. P14 Input detected at EXCT terminal on indoor PCB for refrigerant detector. P15 Missing phase in power input is detected at HIC for 2nd compressor.

P16

Overcurrent of 1st compressor on the secondary side of inverter circuit, or inverter failed to syncronize

with rotation.

P17 2nd compressor discharge temperature too high. P19 Inverter for 2nd compressor failed to start or failed to syncronize with rotation. P20 Too high load in refrigerant circuit. P22 Fan motor or inverter drive of outdoor unit has failure.

P26

Overcurrent of 2nd compressor on the secondary side of inverter circuit, or inverter failed to syncronize

with rotation.

P29 Inverter for 1st compressor failed to start or failed to syncronize with rotation. P31 Other indoor unit in group control has an alarm.

• Contents of alarm display on remote controller For the remote controller, there are other alarm contents listed on the following table besides the alarm display on outdoor main unit control P.C. board.

Wired remote

control display

<E01>

<E02>

<<E03>>

E04

E06

E08

<<E09>>

E12

E15

E16

E20

E24

E25

E26

E29

E31

<<L02>>

<L03>

L05 L06

L07

L08

<<L09>>

L04 L10 L17 L18

Remote controller is detecting error signal from indoor unit.

Controller does not respond to indoor unit.

Indoor unit is detecting error signal from

main outdoor unit.

Outdoor unit is detecting error signal from

indoor unit.

Improper setting of indoor unit or remote

controller.

During auto address setting, number of

connected units does not correspond to

number set. When turning on the power supply, number

of connected units does not correspond to

number set. (Except R.C. address is “0.”)

Improper setting.

Detected contents

Indoor unit does not respond to remote controller.

The remote controller is having error in sending serial communication signal.

Outdoor unit does not respond to indoor unit.

Some indoor units does not respond to outdoor unit.

Indoor unit address is dupulicating. Two or more remote controllers are set as main on R1-R2 link.

Auto Address failed to start. Fewer indoor units are found in Auto Addressing than the setting

on outdoor PCB.

More indoor units are found in Auto Addressing than the setting

on outdoor PCB. No indoor unit responded in Auto Addressing.

No response from sub outdoor unit.

The outdoor unit address is duplicating.

The number of responding outdoor units does not match with

the setting on the main outdoor unit.

No response from main outdoor unit. Error in communication inside outdoor unit control box. Indoor unit model does not match with the outdoor unit model.

(Multi-split/mini-split) Two or more indoor units are set as main in group control. Two or more indoor units are set as priority indoor unit. Two or more indoor units are set as priority indoor unit. Group control wiring is detected for indoor unit set as individual

control.

Indoor unit address is not set.

Capacity setting of indoor unit is not correct. Duplicate system address setting on outdoor units. Capacity setting of outdoor unit is not correct.

Model mismatch between outdoor units in one refrigerant circuit.

Reversing valve or solenoid valve failure.

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Wired remote

control display

<<F01>> <<F02>> <<F03>>

<<F10>>

<<F11>>

F04

F05

F06

F07

F08

F12

F14

F16 F17

F23

F24

<<P01>> <<P09>> <<P10>> <<P12>>

P14 P03

P04

P05 P15

P16

P17

P19

P20 P22

P26

P29

<P31>

F29

F31 H01 H03

H05

H11 H13

H15

H06 H08 H27

Indoor thermistor is either open or damaged.

Outdoor thermistor is either open or damaged.

Protective device in indoor unit is activated.

Protective device in outdoor unit is activated.

Indoor unit communication error of group control

wiring.

EEPROM on indoor unit PCB failure EEPROM on outdoor unit PCB failure Protective device for compressor No. 1 is

activated.

Protective device for compressor No. 2 is

activated.

Oil sensor fault. (Disconnection, etc.)

Detected contents

E1 thermistor on liquid side of indoor heat exchanger has failure. (E1) Indoor unit set as single split. (E2)

E3 thermistor on gas side of indoor heat exchanger has failure. (E3)

TA thermistor for intake air temperature (room temperature) of the indoor

unit has failure. (TA)

BL thermistor for supply air temperature of the indoor unit has failure. (BL)

DISCH1 thermistor at the discharge of 1st compressor reading is abnormal.

DISCH2 thermistor at the discharge of 2nd compressor reading is abnormal.

EXG1 thermistor at the gas side of 1st heat exchanger of the outdoor unit has failure. (EXG1)

EXL1 thermistor at the liquid side of 1st heat exchanger of the outdoor

unit has failure. (EXL1)

TO thermistor for outdoor ambient air temperature has failure. (TO)

SCT thermistor at the suction refrigerant of compressors has failure. (SCT)

SCG thermistor at the outlet of subcooling heat exchanger in outdoor

unit has failure. (SCG) High pressure sensor of the outdoor unit has failure. (HPS) Low pressure sensor of the outdoor unit has failure. (LPS) EXG2 thermistor at the gas side of 2nd heat exchanger of the outdoor

unit has failure. (EXG2)

EXL2 thermistor at the liquid side of 2nd heat exchanger of the outdoor

unit has failure. (EXL2)

Indoor fan motor activated thermal protector.

Connection to the panel of indoor unit is not good. Float switch of drain pan safety is activated.

Indoor fan inverter protection control is activated. Input detected at EXCT terminal on indoor PCB for refrigerant detector.

1st compressor discharge temperature too high.

Protection device activated. High pressure switch (63PH, 63PH1 or

63PH2) or compressor thermal protector (49C1 / 49C2).

Missing phase in power input is detected at HIC for 1st compressor. Missing phase in power input is detected at HIC for 2nd compressor. Overcurrent of 1st compressor on the secondary side of inverter circuit,

or inverter failed to syncronize with rotation.

2nd compressor discharge temperature too high.

Inverter for 2nd compressor failed to start or failed to syncronize with

rotation. Too high load in refrigerant circuit. Fan motor or inverter drive of outdoor unit has failure.

Overcurrent of 2nd compressor on the secondary side of inverter circuit, or inverter failed to syncronize with rotation. Inverter for 1st compressor failed to start or failed to syncronize with

rotation.

Other indoor unit in group control has an alarm.

Overcurrent in 1st compressor.

Current sensor for the 1st compressor is disconnected or shorted.

DISCH1 thermistor at the discharge of 1st compressor is disconnected, shorted or misplaced. (DISCH1)

Overcurrent in 2nd compressor.

Current sensor for the 2nd compressor is disconnected or shorted.

DISCH2 thermistor at the discharge of 2nd compressor is disconnected, shorted or misplaced. (DISCH2)

Low pressure is too low.

OIL1 thermistor for the oil of 1st compressor has failure. (OIL1) OIL2 thermistor for the oil of 2nd compressor has failure. (OIL2)

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Wired remote

control display

H21 H31

Abnormal device function

Detected contents

HIC for 2nd compressor has failure. Overcurrent or overheat of HIC. HIC for 1st compressor has failure. Overcurrent or overheat of HIC.

• The parentheses of << >> used in the table of alarm display does not affect anything the operation of other indoor units.

• The parentheses of < > used in the table of alarm display implies that there are two cases: according to the content of the symptom, some affect the operation of other indoor units and others do not affect anything.

Alarm messages displayed on system controller

Indoor or main outdoor unit is not operating correctly. Mis-wiring of control wiring between indoor unit, main outdoor unit and

system controller.

Indoor or main outdoor unit is not operating correctly. Mis-wiring of control wiring between indoor unit, main outdoor unit and

system controller.

CN1 is not connected properly.

When using wireless remote controller or system controller, in order to check the alarm message in detail, connect wired remote controller to

indoor unit temporarily.

C05

C06

P30

Serial communication errors Mis-setting

Activation of protective device

Error in transmitting serial communication signal

Error in receiving serial communication signal

Protective device of sub indoor

unit in group control is activated.

NOTE

1. Alarm messages in << >> do not affect other indoor unit operations.

2. Alarm messages in < > sometimes affect other indoor unit operations depending on the fault.

ATTENTION!

Adjustment of terminating resistance (pin) is necessary.

Communication failure will occur unless adjustment is made correctly.

• Terminating resistance (pin) is mounted on outdoor unit control P.C. board.

• When connecting central controller, interface or peripheral equipment, adjustment of terminating resistance (pin) is necessary. Although the connection is not made, confirmation is necessary for VRF systems.

• In the case of a refrigerant system, the terminating resistance (pin) for this inter-unit control wiring (S-LINK wiring) is one location (See the section “7-5. Auto Address Setting”). For 2 or more refrigerant systems, 2 locations should be valid (“SHORT” for VRF systems at shipment). See the section “7-5. Auto Address Setting”. In order to make 2 locations valid, let the terminating resistance (pin) of the nearest outdoor unit and the farthest outdoor unit be valid (SHORT side) from the location of central controller. In other refrigerant systems excepting 2 locations described above, make them invalid (OPEN side). It is prohibited making more than 3 locations of terminating resistance valid.

• Since the use of linking the sub outdoor units of VRF systems is not connected to the inter-unit control wiring, it is not necessary to make the terminating resistance invalid “OPEN side”.

Make final confirmation regarding the central controller or interface & inter-unit control wiring (S-LINK wiring) connected to the peripheral equipment. Measure the line resistance with a tester and check whether the values are in the range of 30Ω - 120Ω.

If the resistance values are out of range, check again the terminating resistance. Nevertheless, if the values are out of range, the problem comes from wiring.

• Is the connection properly made?

• Are there any scratches or damages on the coated surface?

Megger

Line

(Wire)

• Measure the line, between wires and ground with the 500V megger (insulation resistance meter) and check the values are over 100MΩ.

• When measuring, be sure to remove both edges of the wire from the terminal board. If not removed, it will be damaged.

• If the line resistance is within 100MΩ, newly carry out the wiring work.

Between wires and ground

(Wire)

(Ground)

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– NOTE –

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– NOTE –

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– NOTE –

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Printed in China 85464369760022

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ACXF60-18511 DC0314-30718

Panasonic U-72ME2U9, U-96ME2U9, U-120ME2U9, U-144ME2U9, U-72ME2U94 installation

Specifications and Main Features

Frequently Asked Questions

User Manual