Mitsubishi PUHZ-RP8YHA, PUHZ-RP10YHA Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R410A

Outdoor unit [model names]

[Service Ref.]

No.OC317

PUHZ-RP8YHA

PUHZ-RP10YHA

PUHZ-RP8YHA PUHZ-RP10YHA

CONTENTS

1. SAFETY PRECAUTION·······································2

COMBINATION OF INDOOR AND OUTDOOR UNITS

3. FEATURES···························································7

4. SPECIFICATIONS ················································8

5. DATA ····································································9

6. OUTLINES AND DIMENSIONS·························11

7. WIRING DIAGRAM············································12

8. WIRING SPECIFICATIONS ·······························13

9. SPECIFICATIONS FOR ELECTRICAL WORK ····14

10.

REFRIGERANT SYSTEM DIAGRAM

11. CAPACITY CURVES ··········································18

12.APPLICABLE EXTENSION PIPE FOR EACH MODEL ···19

13. TROUBLESHOOTING········································25

14. DISASSEMBLY PROCEDURE ··························71

15. PARTS LIST ·······················································79

Model name indication

16. OPTIONAL PARTS ······························BackCover

····6

···················17

PUHZ-RP8YHA PUHZ-RP10YHA

1 SAFETY PRECAUTION

Use new refrigerant pipes.

Make sure that the inside and outside of refrigerant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness.

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.

In case of using the existing pipes for R22, be careful with the followings.

· Change flare nut to the one provided with this product. Use a newly flared pipe.

· Avoid using thin pipes.

Charge refrigerant from liquid phase of gas cylinder.

If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check valve.

Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Keep the tools with care.

If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.

If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

If large amount of mineral oil enter, that can cause deterioration of refrigerant oil etc.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

1-1. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

[1] Cautions for service

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

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

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

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

Unit

Gravimeter

[3] Service tools

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

No. Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

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

2 Charge hose ·Only for R410A

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

3 Electronic scale 4 Gas leak detector ·Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check ·Attach on vacuum pump. 6 Refrigerant charge base 7 Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)

8 Refrigerant recovery equipment

specifications

Cylinder with syphon

. (UNF1/2)

1-2. CHANGED POINT

Measure the existing pipe thickness and check for damage.

The existing pipe thickness meets specifications and the pipes are not damaged.

The existing pipe thickness does not meet specifications or the pipes are damaged.

Check if the existing air conditioner can operate.

The existing air conditioner can operate. The existing air conditioner cannot operate.

After operating the cooling system for about 30 minutes, do a pump down work.

Use a refrigerant collecting device to collect the refrigerant.

Check the oil condition when collecting the refrigerant.

Oil is clean. (Clear to brownish color)

Oil is dirty. (Black color)

When the compressor bearings are glazed, rotation scratches are present, or the compressor breaks down, iron particles or oil deterioration will blacken the oil.

Disconnect the existing air conditioner from the pipes.

The existing piping can be reused. After flaring the pipes again, connect the new air conditioner.

The existing pipes cannot be reused. Use new pipes.

Perform the following inspections: air tightness test, vacuum dryness (additional refrigerant charge), gas leakage check

Replacement operation

Test operation

Replacement operation is the operation by which impurities remaining in the existing piping (chlorinated compounds) are captured by the activated carbon filter (replacement filter) in the outdoor unit.

• This model will automatically begin the replacement operation after it has been installed when it enters the initialization phase for normal heating or cooling. However , the unit will not automatically perf orm the replacement operation if it is moved to a new location where it will be used with existing R22 refrigerant piping. Under such conditions, always use the SW8-2 operations to perform the replacement operation before beginning the test operation.

• Precautions when reusing existing R22 refrigerant pipes (1) Flowchart

Connecting a new air conditioner to existing R22 refrigerant pipes

1 Flare the pipe for the use with R410A refrigerant.

Use the flare nut attached to indoor and outdoor unit of the new air conditioner only.

2 When reusing existing R22 refrigerant pipes of which gas pipe is [28.58mm and, in addition, when the outdoor unit is

installed to lower position than the indoor unit, be sure to change the setting of the DIP SW8-1 on the controller circuit board of the outdoor unit to ON.

✽ This is to increase the speed of refrigerant passing in the gas pipe so that refrigerant oil can smoothly flow in the system.

• Use a different-diameter joint or brazing for the connection.

3 When reusing standard-size existing R22 refrigerant pipes.

The pipes can be reused with pipe length restriction described on 12-1.

(2) Cautions for refrigerant piping work

1/4” 3/8” 1/2” 5/8” 3/4”

7/8”

1”

1”-1/8”

6.35

9.52

12.70

15.88

19.05

22.20

25.40

28.58

0.8

1.0

— — — —

0.8

1.0

Nominal

dimensions

Diagram below: Piping diameter and thickness

Outside

diameter

(mm)

Thickness

(mm)

R410A R22

1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

9.1

13.2

16.6

19.7

—

9.0

13.0

16.2

19.4

23.3

Nominal

dimensions

Flare cutting dimensions

Outside

diameter

Dimension A

( )

-0.4

(mm)

R410A R22 1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

17.0

22.0

26.0

29.0

—

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions

Flare nut dimensions

Outside

diameter

Dimension B

(mm)

R410A

w36.0mm for

indoor unit of RP4, 5 and 6

R22

Gauge manifold Charge hose Gas leak detector

Refrigerant recovery equipment Refrigerant cylinder Applied oil

Safety charger

Charge valve Vacuum pump

Flare tool

Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale

Vacuum gauge or thermistor vacuum gauge and vacuum valve Charging cylinder

Air purge and refrigerant charge Operation check and the two above Gas leak check Collection of refrigerant Refrigerant charge Apply to flared section

Prevent compressor malfunction when charging refrigerant by

spraying liquid refrigerant Prevent gas from blowing out

when detaching charge hose Vacuum drying and air purge

Flaring work of piping

Bend the pipes Cut the pipes Weld the pipes Charge refrigerant Check the degree of vacuum. (Vacuum

valve prevents back flow of oil and refrigerant to thermistor vacuum gauge) Charge refrigerant

Tool exclusive for R410A Tool exclusive for R410A Tool for HFC refrigerant Tool exclusive for R410A Tool exclusive for R410A Ester oil and alkylbenzene oil (minimum amount) Tool exclusive for R410A

Tool exclusive for R410A Tools for other refrigerants can

be used if equipped with adopter for reverse flow check Tools for other refrigerants

can be used by adjusting flaring dimension Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used

Tool exclusive for R410A

Tools and materials Use R410A tools Can R22 tools be used?

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Can R407C tools be used?

Ester oil: Alkylbenzene oil: minimum amount

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting

flaring dimension)

: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.) : Tools for other refrigerants can be used under certain conditions. : Tools for other refrigerants can be used.

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410Ais same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

1Thickness of pipes

Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7mm or below.)

2Dimensions of flare cutting and flare nut

The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because of its working pressure higher than that of other refrigerants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also have partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2” and 5/8”, the dimension B changes.

Use torque wrench corresponding to each dimension.

Dimension A

3Tools for R410A (The following table shows whether conventional tools can be used or not.)

Dimension B

2 COMBINATION OF INDOOR AND OUTDOOR UNITS

2-1. 1:1 SYSTEM

Outdoor unit

Indoor unit

PEH-RP·MYA

2-2. SYNCHRONIZED TWIN, TRIPLE AND QUADRUPLE SYSTEM

(1) Synchronized twin (50:50) (2) Synchronized triple (33:33:33)

Indoor unit

PLA-RP4AA ✕ 2 PLA-RP5AA ✕ 2 PEAD-RP4EA ✕ 2 PEAD-RP5EA ✕ 2 PEAD-RP4GA ✕ 2 PKA-RP4FAL ✕ 2 PCA-RP4GA ✕ 2 PCA-RP5GA ✕ 2

PUHZ-RP·YHA

810

Outdoor unit

PUHZ-RP·YHA

810

Indoor unit

PLA-RP2.5AA ✕ 3 PLA-RP3AA ✕ 3 PEAD-RP2.5EA ✕ 3 PEAD-RP3EA ✕ 3 PEAD-RP2.5GA ✕ 3 PEAD-RP3GA ✕ 3 PKA-RP2.5FAL ✕ 3 PKA-RP3FAL ✕ 3 PCA-RP2.5GA ✕ 3 PCA-RP3GA ✕ 3

Outdoor unit

PUHZ-RP·YHA

810

(3) Synchronized quadruple (25:25:25:25)

Outdoor unit

Indoor unit

PLA-RP2AA ✕ 4 PLA-RP2.5AA ✕ 4 PEAD-RP2EA ✕ 4 PEAD-RP2.5EA ✕ 4 PEAD-RP2.5GA ✕ 4 PKA-RP2GAL ✕ 4 PKA-RP2.5FAL ✕ 4 PCA-RP2GA ✕ 4 PCA-RP2.5GA ✕ 4

PUHZ-RP·YHA

810

2-3. MULTI DISTRIBUTION PIPE (OPTION)

Ratio of distributing Part No. Synchronized twin 50:50 MSDD-50WR-E Synchronized triple 33:33:33 MSDT-111R-E Synchronized quadruple 25:25:25:25 MSDF-1111R-E

3 FEATURES

PUHZ-RP8YHA PUHZ-RP10YHA

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m)

The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator always control the optimal refrigerant level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes problems. Heretofore it is completely eliminated. This unique system improves the quality and reliability of the work done.It also helps to speed up the installation time.

4 SPECIFICATIONS

Service Ref.

Function Capacity Total input

Power supply (phase, cycle, voltage)

External finish Refrigerant control Compressor

Crankcase heater Heat exchanger Fan Fan(drive) o No.

Defrost method

OUTDOOR UNIT

Noise level Dimensions

Weight Refrigerant

Pipe size O.D. Connection method Between the indoor &

outdoor unit

REFRIGERANT PIPING

Running current

Model Motor output Starter type Protection devices

Fan motor output Airflow

Charge Oil (Model)

/min(CFM

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

mm(in.) mm(in.) mm(in.)

kg(lbs)

mm(in.) mm(in.)

Btu/h

kW kW

dB dB

Cooling

64,800

19.0(10.0~22.4)

)

6.76

10.0

Heating

76,400

22.4(10.0~25.0)

6.98

3-ph, 50Hz, 380-400-415V (4wires)

10.4 Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

ANV47FFBMT

4.5 Line start

HP switch, LP switch, Discharge thermo

Plate fin coil

Propeller fan o 1

0.635

150(5,300)

Reverse cycle 55 56

900(35-7/16)

750(29-17/32)

1,798(70-25/32)

198(436)

R410A

10.5(23.1)

2.30(MEL56)

9.52(3/8)

25.4(1) Flared

Flared & Brazing

Max. 40m Max. 80m

Cooling

75,000

22.0(12.5~28.0)

—

7.83

11.5

PUHZ-RP10YHAPUHZ-RP8YHA

Heating

92,100

27.0(15.7~31.5)

8.41

12.4

5.5

58 58

12.7(1/2)

28.58(1-1/8)

Notes1.Rating Conditions (ISO T1)

Cooling :Indoor : D.B. 27˚C(80˚F), W.B. 19˚C(66˚F) Outdoor : D.B. 35˚C(95˚F), W.B. 24˚C(75˚F) Heating :Indoor : D.B. 20˚C(68˚F) Outdoor : D.B. 7˚C(45˚F), W.B. 6˚C(43˚F) Refrigerant piping length (one way) : 5m (16ft)

2. Guaranteed operating range Indoor

Cooling

Heating

3. Guaranteed voltage

342~457V, 50Hz

4. Above data based on indicated voltage

5. Refer to the service manual of indoor unit for the indoor unit's specifications.

6. The total input is of twin combination of 4-way cassette.

Upper limit Lower limit Upper limit Lower limit

Indoor Unit 1 phase 230V 50Hz Outdoor Unit 3 phase 400V 50Hz

D.B. 35˚C, W.B. 22.5˚C

D.B. 19˚C, W.B. 15˚C

D.B. 28˚C D.B. 17˚C

Outdoor

D.B. 46˚C

D.B. -5˚C D.B. 21˚C, W.B. 15˚C D.B. -20˚C, W.B. -20˚C

5 DATA

5-1. ELECTRICAL PARTS SPECIFICATIONS

Outdoor unit

Parts name

FUSE

(FUSE1,2)

FUSE

(FUSE3,4)

Solenoid Valve

(Four-way Valve)

Solenoid Valve Coil

(Four-way Valve)

21S4

Linear Expansion

Valve

(LEV-A)

Linear Expansion

Valve Coil

(LEV-A)

Solenoid Valve

Solenoid Valve Coil

(SV)

Reactor

(DCL)

High Pressure

Switch

(63H)

Low Pressure

Switch

(63L)

Fan Motor

(MF)

Thermistor

(Outdoor Pipe)

(TH3, TH32 )

Thermistor

(Discharge)

(TH4)

Thermistor

(Outdoor2-PhasePipe)

(TH6)

Thermistor

(Outdoor)

(TH7)

Terminal Block

(Power Supply)

(TB1)

Terminal Block

(Indoor / Outdoor)

(TB2)

Main Smoothing Capacitor

(CB1, CB2)

Rush Current

Protect Resister

(RS)

PUHZ-RP8YHA

250V 15A

250V 6.3A

VT60100

LB64

(DM50G461)

HAM-BD32

(0~480 Pulse)

DC12V

VF20100

LD2

2.7mH 25A

OFF 3.60+0.2MPa

ON 2.80i0.15MPa

OFF -0.03i0.03MPa ON 0.05i0.04MPa

6P 635W o1

PA6Y635-T

0:/15t, 10:/9.6t, 20:/6.3t, 25:/5.4t, 30:/4.3t, 40:/3.0t

20:/250t, 30:/160t, 40:/104t, 50:/70t, 60:/48t, 70:/34t, 80:/24t, 90:/15t, 100:/13t

0:/15t, 10:/9.6t, 20:/6.3t, 25:/5.4t, 30:/4.3t, 40:/3.0t

(L1, L2, L3, N, )

(S1, S2, S3)

2200= 400V

16" 30W

PUHZ-RP10YHA

Motor Compressor

(MC)

ANV47FFBMT

5-2. COMPRESSOR TECHNICAL DATA

U-V U-W W-V

Unit

Compressor model

Winding

Resistance

( " )

ANV47FFBMT

(at 20°C)

0.72

PUHZ-RP8, 10YHA

MICROPHONE

UNIT

GROUND

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-RP8YHA

COOLING

MODE

HEATING

55.0

SPL(dB)

56.0

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-RP10YHA

COOLING

MODE

HEATING

58.0

SPL(dB)

58.0

LINE

5-3. NOISE CRITERION CURVES

6 OUTLINES AND DIMENSIONS

[

O.D

[

28.58

O.D

[

25.4

[

25.4

Refrigerant GAS PIPE connection (BRAZING)

[

12.7 (1/2F)

[

9.52 (3/8F)

10YHA

8YHA

Refrigerant LIQUID PIPE connection (FLARE)

AIR INTAKE

AIR FLOW

218

375

460

Drain Hole(4-[10)

Drain Hole

Piping Hole (Knock-OUT)

Indoor/Outdoor Wiring

Power supply Wiring (Earth wiring)

Wiring Hole([ 40 Knock-OUT)

Wiring Hole([ 27 Knock-OUT)

200

42 48

(Rear Side)

Service panel

Wiring Hole([ 27 Knock-OUT)

Wiring Hole([ 40 Knock-OUT)

110

Piping Hole([ 122 Knock-OUT)

150

Piping Hole([ 122 Knock-OUT)

Wiring Hole([ 40 Knock-OUT)

200

4350364

(780)

(22)

180

140

120

317

123 105

161

900

700~796

560

750

736

900 750

1798

1519

1457

667

152

191

195821

380

780

736

Wiring Hole([ 27 Knock-OUT)

(Front Side)

Service panel

FOUNDATION BOLTS PITCH & DRAIN HOLES

Front side

Wiring Hole([40 Knock-OUT)

Wiring Hole([27 Knock-OUT)

MITSUBISHI

ELECTRIC

PUHZ-RP8YHA PUHZ-RP10YHA

Unit : mm

7 WIRING DIAGRAM

PUHZ-RP8YHA PUHZ-RP10YHA

8 WIRING SPECIFICATIONS

WIRING SPECIFICATIONS FOR 220V-240V 50Hz (INDOOR - OUTDOOR CONNECTING CABLE)

The cable shall not be lighter than design 245 IEC or 227 IEC. When cable length is 30m or more.

Use one cable for S1 and S2 and another for S3 as shown in the picture.

wire size : cable length 50m : 4mm cable length 80m : 6mm

2 2

The cable length may vary depending on the condition of installation, humidity or materials, etc.

Cross section

of cable

Wire size

)

(mm

Number of wires

Polarity L(m) ✽5

Round

2.5

Clockwise : S1-S2-S3

Flat

2.5

Not applicable (Because center wire has no cover finish)

applicable

Flat

1.5

From left to right : S1-Open-S2-S3

Round

2.5

Clockwise : S1-S2-S3-Open Connect S1 and S3 to the opposite angle

(30)

✽1

Not

✽2

(18)

✽3

✽4

✽1 : In case that cable with stripe of yellow and green is available. ✽2 : In the flat cables are connected as this picture, they can be used up to 30m.

(3C Flat cable ✕ 2)

S1 S2 S3

✽3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm2. ✽4 : In case of regular polarity connection (S1-S2-S3). ✽5 : Mentioned cable length is just a reference value.

It may be different depending on the condition of installation, humidity or materials, etc.

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections). Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point. (If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)

Outdoor unit Power supply

Phase Frequency & Voltage

Outdoor unit (A)

Wire No.

Models (Outdoor unit)

3N~(3ph 4wires)

50Hz, 380-400-415V

Outdoor unit Power supply Input capacity Main switch/Breaker

Indoor unit/Outdoor unit connecting Wire No. o size (e) Remote controller-indoor unit connecting Wire No. o size (e)

Control circuit rating

Wiring

Cable 2C o 0.69

This wire is accessory of remote controller

(Wire length: 10m, Non-polar)

Indoor unit-Outdoor unit: S1-S2 AC220V-230V-240V

S2-S3 DC24V

Remote controller-Indoor unit: DC14V

RP8 RP10

Cable length 50 m : 3 o 4 (Polar) Cable length 80 m : 3 o 6 (Polar)

1 2

S1 S2 S3

Indoor/outdoor unit connection cable

Indoor unit

Unit power supply

Outdoor unit

Remote controller

L1 L2 L3 N

Grounding

L1 L2 L3 N

1 2

Indoor unit

S2 S3

S1 S2 S3

Unit power supply

Indoor/outdoor unit connection cable

Indoor unit

Outdoor unit

Remote controller

Grounding

1 2

S1 S2 S3

Indoor/outdoor connection cable

Indoor unit

Unit power supply

Indoor unit

Outdoor unit

Remote controller

L2 L3 N

Grounding

1 2

S1 S2 S3

1 2

S1 S2 S3

1 2

S1 S2 S3

Indoor/outdoor connection cable

Indoor unit

Unit power supply

Indoor unit

Outdoor unit

Remote controller

L1 L2 L3 N

Grounding

Indoor unit

SPECIFICATIONS FOR ELECTRICAL WORK

9-1. FIELD ELECTRICAL WIRING (POWER WIRING SPECIFICATIONS) PUHZ-RP•YHA

Check items

1. Wiring size must comply with the applicable local and national code.

2. Be careful about choosing the installation location for the earth leakage breaker and how it is installed as the initial electric current may cause it to malfunction.

3. Power supply cords and indoor unit / Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flex-

ible cord. (design 254 IEC 57)

1:1 system Synchronized twin, triple and quadruple system

Electrical wiring

• Synchronized twin

• Synchronized triple

• Synchronized quadruple

9-2. M-NET WIRING METHOD

Group remote controller

Refrigerant address 00

M-NET address 01

A-control remote controller

Refrigerant address 00

M-NET address 02

Refrigerant address 00

M-NET address 03

Power supply unit for transmission wire

Central remote controller

M-NET transmission wire

✕ Bad example (Multi spot grounding of shield wire)

Good example 1 (Single spot grounding of shield wire)

Power supply appliance

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Good example 2 (Single spot grounding of shield wire)

(Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from

making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube.

(2) Terminal block (TB7) for transmission wires should never be connected to 220~240V power supply. If it is connected,

electronic parts on M-NET p.c. board may be burn out.

(3) Use 2-core x 1.25mm2shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this because this may cause a malfunction.

It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.

(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to

the influence of electromagnetic noise.

If there are more than two grounding spots on the shield wire, noise may enter into the shield wire because the ground

wire and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among grounding spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield wire do not form one circuit.

To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the

installation manual.

“Ed” error will appear on the LED display of outdoor unit. “0403” error will appear on the central-control remote controller.

M-NET Address No.

Switng setting

SW11 ones digit

SW12 tens digit

OFF

Refrigrant address

OFF

System controller

A-control remote controller

Group A Group B Group C

A-control remote controller

TB5

A-control remote controller

Refrigerant address 00

M-NET address 01

Refrigerant address 00

M-NET address 02

Refrigerant address 01

M-NET address 03

Refrigerant address 00

M-NET address 04

Power supply unit for transmission wire

A-control remote controller

TB5

Group A Group B

Refrigerant address 00

M-NET address 01

Refrigerant address 01

M-NET address 02

Refrigerant address 00

M-NET address 04

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

System controller

Power supply unit for transmission wire

● M-NET wiring

(1) Use 2-core x 1.25mm

shield wire for electric wires.

(Excluding the case connecting to system controller.)

(2) Connect the wire to the M-NET terminal block.Connect one core of the

transmission wire (non-polar) to Aterminal and the other to B. Peel the shield wire, twist the shield part to a string and connect it to S terminal.

(3) In the system which several outdoor units are being connected, the terminal

(A, B, S) on M-NET terminal block should be individually wired to the other

M-NET terminal block

ABS

Transmission

wire

Ground wire

Shield part

outdoor unit’s terminal, i.e. Ato A, B to B and S to S.In this case, choose one of those outdoor units and drive a screw to fix an ground wire on the plate as shown on the right figure.

9-2-1. M-NET address setting

In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to Free Combo system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as that of the indoor unit in Free Combo system), and the address number should be consecutively set in a same group.

Address number can be set by using rotary switches (SW11 for ones digit and SW12 for tens digit), which is located on the M-NET p.c. board of outdoor unit. (Factory setting: all addresses are set to “0”.)

9-2-2. Refrigerant address setting

In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group setting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller circuit board. [Factory setting: all switches are OFF. (All refrigerant addresses are “00”.)]

9-2-3. Regulations in address settings

In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above section. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.

w Refrigerant addresses can be overlapped if they are in the different group.

w In group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As

“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in the group for the outdoor unit whose refrigerant address is “00”.

10 REFRIGERANT SYSTEM DIAGRAM

Strainer

#50

Strainer

#50

Strainer

#100

Strainer

#100

Strainer

#100

Strainer

#100

Oil

separator

Strainer

#100

Stop valve

(with service port)

Stop valve

(with service port)

Charge plug

(Low pressure)

Accumulator

Oil-back hole

Strainer#40

Linear expansion valve

Low pressure switch 63L

Compressor

Capillary tube1

Capillary tube2

Replace

filter

High pressure switch 63H

Bypass valve

Charge plug

(High pressure)

Thermistor TH4

(Discharge)

Thermistor TH6

(Outdoor 2-phase pipe)

Thermistor TH7

(Outdoor)

Thermistor TH3

(Outdoor pipe)

Thermistor TH32 (Outdoor pipe)

Heat exchanger

4-way valve

Refrigerant GAS pipe connection (RP8:1, RP10:1-1/8)

Refrigerant LIQUID pipe connection (RP8:3/8F, RP10:1/2F)

Refrigerant flow in cooling Refrigerant flow in heating

PUHZ-RP8YHA PUHZ-RP10YHA

11 CAPACITY CURVES

Cooling capacity

1.4

Indoor intake air wet-bulb temperature <W.B. :>

1.2

0.8

Cooling capacity ratio

0.6

-5 0 5 10 15 20 25 30 35 40 46

1.2

1.0

0.8

22 20

0.6

Cooling input ratio

0.4

Cooling input

-5 0 5 10 15 20 25 30 35 40 46

Outdoor intake air dry-bulb temperature <D.B. :>

Heating capacity Heating input

Indoor intake air dry-bulb temperature <D.B. :>

Indoor intake air wet-bulb temperature <W.B. :>

Outdoor intake air dry-bulb temperature <D.B. :>

Indoor intake air dry-bulb temperature <D.B. :>

18 16

Outdoor intake air wet-bulb temperature <W.B. :> Outdoor intake air wet-bulb temperature <W.B. :>

Note : These diagrams show the case where the operation frequency of a compressor is fixed.

12 APPLICABLE EXTENSION PIPE FOR EACH MODEL

70m

[30m]

SW : When the outdoor unit is located lower than

the indoor unit, set DIP SW8-1 on the outdoor unit controller board to ON.

RP8

RP10

Liquid

pipe

(mm)

Thick-

ness

Thick-

ness

gas

pipe

(mm)

[

19.05 t1.0

20m

[20m]

20m

[20m]

[

22.2

t1.0

50m

[30m]

50m

[30m]

[

25.4

t1.0

Normal piping

70mw1

[30m]

70m

[30m]

[

28.58 t1.0

70m

[30m]

70m

[30m]

[

19.05 t1.0

20m

[20m]

20m

[20m]

[

22.2

t1.0

50m

[30m]

50m

[30m]

[

25.4

t1.0

70m

[30m]

70m

[30m]

[

28.58 t1.0

70m

[30m]

Normal piping

70mw1

[30m]

[

28.58 t1.0

50m

[20m]

50m

[20m]

[

31.75 t1.0

50m

[20m]

50m

[20m]

[

25.4

t1.0

50m

[20m]

50m

[20m]

[

22.2

t1.0

50m

[20m]

50m

[20m]

Note : The maximum pipe length is 80m in case of new piping.

w1 Be sure to use hard (tempered) one for pipe over [22.2.(Do not use soft (annealed) one.) w2 When using [31.75 pipe, the outdoor temperature range (dry-bulb temperature) for heating operation is -11 to +21:.

<Table 1> Maximum pipe length (RP8·RP10)

Marks in the table above

[

9.52

t0.8

[

12.7

t0.8

[

15.88 t1.0

The maximum pipe length Charge-less pipe length

: It can be used. : Cooling capacity is lowered.➝ Refer to <Table6> : Additional refrigerant charge is required when the pipe length exceeds 20m.➝ Refer to <Table7>

Amount of additional refrigerant charge (kg)

30 m and less 31-40 m and less 41-50 m and less 51-60 m and less 61-70 m and less 71-80 m and less

0.9 kg 1.8 kg 2.7 kg 3.6 kg

1.2 kg 2.4 kg 3.6 kg 4.8 kg

Outdoor unit

permitted pipe length

RP8

RP10

80m or less

At time of shipping

(kg)

10.5

No additional

charge necessary

The additional charge amount is obtained by the following formula.

Main piping: Liquid line size [9.52 overall length [m]

0.09

[kg/m]

Branch piping: Liquid line size [9.52 overall length [m] o 0.06 [kg/m]

Branch piping: Liquid line size [6.35 overall length [m] o 0.02 [kg/m]

3.6 (kg)

Amount of additional charge [kg]

Main piping: Liquid line size [12.7 over all length [m] o 0.12 [kg/m]

–=

Additional charge amount for 70 m

RP8 3.6 kg

RP10 4.8 kg

Calculate the additional charge amount based on the following procedure. If the calculation results in an amount that is smaller than the "Additional charge amount for 70m," perform the additional charge using the amount shown in "Additional charge amount for 70m."

12-1. 1:1 SYSTEM

(1) Pipe length

(2) Adjusting the amount of refrigerant

Check additional refrigerant charging amount referring to table 7 when the liquid pipe diameter is larger than the standard size, and table 2 when the pipe of the standard diameter is used.

(3) Capacity correction

100

5 10152025303540455055606570758085

Corrected pipe length (m)

Capacity ratio [%]

RP8·10

Heating RP8·10

100

510152025303540455055

Corrected pipe length [m]

Capacity ratio [%]

Heating RP8([22.2), RP10([25.4)

Cooling RP8([22.2)

Cooling RP10([25.4)

100

510152025

Corrected pipe length [m]

Cpacity ratio [%]

Cooling RP10([22.2)

Cooling RP8([19.05)

Heating RP8([19.05), RP10([22.2)

Cooling and heating capacity is lowered according to the piping length. Capacity can be obtained by referring to the following capacity curves. When the diameter of the gas pipe is smaller than the standard size, cooling capacity is lowered comparing to the operation using the standard diameter pipe. The lowered capacity can be obtained by referring to the capacity curves for gas pipe which is one or two size smaller than standard size. Corrected pipe length (m) = actual pipe length (m) + number of bends o 0.3 (m)

1. Capacity curves 1 <Standard size>

2. Capacity curves 2 <When the gas pipe's diameter is one-size-smaller than the standard

3. Capacity curves 3 <When the gas pipe's diameter is two-size-smaller than the standard

12-2. SYNCHRONIZED TWIN, TRIPLE AND QUADRUPLE SYSTEM

(1) Synchronized twin

Maximum pipe length (Main pipe[A]+Branch pipe diameter [ B and C ])

Main pipe

(mm)[A]

Branch

pipe [mm] [B, C]

w1 The maximum pipe length is 80m in case of new pipping. w2 When using [31.75 pipe, the outdoor temperature range (dry-bulb temperature) for heating operation is -11 to +21:.

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

[6.35 [12.7 [9.52

[15.88

[9.52

[19.05

[12.7

[19.05

(2) Synchronized triple

Maximum pipe length (Main pipe [A] + Branch pipe [ B, C and D ])

Main pipe

(mm)[A]

Branch

pipe [mm]

[B, C, D]

w1 The maximum pipe length is 80m in case of new pipping. w2 When using [31.75 pipe, the outdoor temperature range (dry-bulb temperature) for heating operation is -11 to +21:.

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

[6.35 [12.7 [9.52

[15.88

[9.52

[19.05

[12.7

[19.05

[9.52

[19.05 [22.2 [25.4 [28.58 [19.05 [22.2 [25.4 [28.58 [22.2 [25.4 [28.58 [31.75 [19.05 [22.2 [25.4 [28.58 [19.05 [22.2 [25.4 [28.58 [22.2 [25.4 [28.58 [31.75

Normal

piping

[9.52

70mw1

[30m]

70m

[30m]

70m

[30m]

Normal

piping

70mw1

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

50m

20m

[30m]

[20m]

20m

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

[19.05 [22.2 [25.4 [28.58 [19.05 [22.2 [25.4 [28.58 [22.2 [25.4 [28.58 [31.75 [19.05 [22.2 [25.4 [28.58 [19.05 [22.2 [25.4 [28.58 [22.2 [25.4 [28.58 [31.75

20m

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

[12.7 [15.88 [9.52 [12.7 [15.88

20m

[20m]

20m

[20m]

20m

[20m]

20m

[20m]

20m

[20m]

20m

[20m]

50m

[30m]

50m

[30m]

50m

[30m]

50m

[30m]

50m

[30m]

50m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

[12.7 [15.88 [9.52 [12.7 [15.88

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

20m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

20m

50m

[20m]

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

20m

[20m]

20m

[20m]

20m

[20m]

20m

[20m]

20m

[20m]

20m

[20m]

RP10 twin (RP5✕2)RP8 twin (RP4✕2)

Normal

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

piping

70mw1

[30m]

70m

[30m]

70m

[30m]

Normal

piping

70mw1

[30m]

70m

[30m]

70m

[30m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[30m]

50m

[30m]

50m

[30m]

RP10 triple (RP3✕3)RP8 triple (RP2.5✕3)

50m

[30m]

50m

[30m]

50m

[30m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m] w2

50m

[20m] w2

50m

[20m]

50m

[20m] w2

50m

[20m] w2

50m

[20m]

(3) Synchronized quadruple

Maximum pipe length (Main pipe[A]+Branch pipe [ B, C, D and E ])

Main pipe

(mm)[A]

Branch

pipe [mm]

[B, C, D, E]

w1 The maximum pipe length is 80m in case of new pipping. w2 When using [31.75 pipe, the outdoor temperature range (dry-bulb temperature) for heating operation is -11 to +21:.

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Gas pipe

Marks in the table above

[19.05 [22.2 [25.4 [28.58 [19.05 [22.2 [25.4 [28.58 [22.2 [25.4 [28.58 [31.75 [19.05 [22.2 [25.4 [28.58 [19.05 [22.2 [25.4 [28.58 [22.2 [25.4 [28.58 [31.75

[6.35

20m

[12.7

[20m]

[9.52

20m

[15.88

[20m]

[9.52

20m

[20m]

[19.05

[12.7

[19.05

SW : When the outdoor unit is located lower than

70m

[30m]

: It can be used. : Cooling capacity is lowered.➝ Refer to <Table6> : Additional refrigerant charge is required when the pipe length exceeds 20m.➝ Refer to <Table7>

The maximum pipe length Charge-less pipe length

[9.52

Normal

piping

70mw1

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

50m

[30m]

50m

[30m]

50m

[30m]

the indoor unit, set DIP SW8-1 on the outdoor unit controller board to ON.

[12.7 [15.88 [9.52 [12.7 [15.88

20m

[20m]

20m

[20m]

20m

[20m]

50m

[30m]

50m

[30m]

50m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

20m

50m

[20m]

50m

20m

[20m]

20m

[20m]

50m

[30m]

50m

[30m]

50m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

RP10 quadruple (RP2.5✕4)RP8 quadruple (RP2✕4)

20m

[20m]

20m

[20m]

20m

[20m]

50m

[30m]

50m

[30m]

50m

[30m]

70m

[30m]

70m

[30m]

70m

[30m]

Normal

piping

70mw1

[30m]

70m

[30m]

70m

[30m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m]

50m

[20m] w2

50m

[20m] w2

50m

[20m]

Pipe diameter and thickness

[6.35

(mm)

Thickness

(mm)

Be sure to use hard (tempered) one for pipe over [22.2.(Do not use soft (annealed) one.)

[9.52 [12.7 [

0.8

0.8 0.8 1.0 1.0 1.0 1.0 1.0

15.88[19.05

[22.2 [25.4 [

28.58

[

31.75

1.1

B C

1 Indoor unit 2

Outdoor unit

Main piping

Branch piping

Multi disttibution pipe (option)

<Table 6> Lowered cooling capacity by the smaller gas pipe diameter

Pipe length

5m and less

6~10m 11~20m 21~30m 31~40m 41~50m

gas pipe [22.2 gas pipe [19.05

100%

100~96%

96~91% 91~86% 86~83% 83~80%

100%

100~91%

91~81%

Height difference (Indoor unit-

Outdoor unit) Max. 40 m Height difference (Indoor unit-

Indoor unit) Max. 1 m

Distance between indoor and indoor units

pipe length.

B—C B—D B—E C—D C—E D—E

Number of pipe bends

Within 15 points8 points between main pipe A and each branch pipe (B, C, D, E).

RP10 Cooling capacity ratioRP8 Cooling capacity ratio

gas pipe [25.4 gas pipe [22.2

100%

100~98%

98~94% 94~91% 91~88% 88~86%

100%

100~95%

95~88%

<Table 7> Additional refrigerant amount when the liquid pipe of the larger diameter is used.

(Single /Simultaneous Twin / Simultaneous Triple / Simultaneous Quadruple)

When the extension pipe length (main piping + branch piping) exceeds 20mCapacity

RP8, RP10

L1 : [15.88 liquid pipe (m) L2 : [12.7 liquid pipe (m) L3 : [9.52 liquid pipe (m) L4 : [6.35 liquid pipe (m)

If the calculation produces a negative number (i.e. a "minus" charge), additional charging is not necessary. ( W [ 0)

Additional refrigerant amount W(g)=(180oL1)+(120oL2) (90oL3)+(30oL4)-3000

Permissible total A+B or A+C Charge-less

Outdoor unit piping length or piping length

A+B+C+D+E A+D or A+E A+B+C+D+E

RP8

PR10

80 m and less 80 m and less 30 m and less

Outdoor unit

RP8

RP10

B-C or B-D or

B-E or C-D or

C-E or D-E

8 m and less Within 15

Number of pipe bends

Outdoor unit

RP8

RP10

permitted pipe length

80m or less

At time of shipping

(kg)

10.5

30 m and less 31-40 m and less 41-50 m and less 51-60 m and less 61-70 m and less 71-80 m and less

No additional

charge necessary

0.9 kg 1.8 kg 2.7 kg 3.6 kg

1.2 kg 2.4 kg 3.6 kg 4.8 kg

Amount of additional refrigerant charge (kg)

A+B+C+D

The additional charge amount is obtained by the following formula.

When length exceeds 70 m

When the total length of the piping exceeds 70 m, calculate the amount of additional charge based on the following requirements. Note: If the calculation produces a negative number (i.e. a “minus” charge), of if calculation results in an amount that is less than the “Additional charge amount for 70 m,”perform the additional charge using the amount shown in “Additional charge amount for 70 m.”

Amount of additional charge

Additional charge amount for 70 m

Main piping: Liquid line size [12.7 overall length

0.12

RP8 3.6 kg

RP10 4.8 kg

Main piping: Liquid line size

+++

[9.52 overall length

0.09 (Gas line:[28.58)

Branch piping: Liquid line size [9.52 overall length

0.06 (Gas line: [15.88)

Branch piping: Liquid line size [6.35 overall length

0.02 (Gas line: [15.88)

–=

3.6 (kg)

1. Perform refrigerant piping connections for the indoor / outdoor unit while the outdoor unit's stopvalve is completely closed (factory setting), and then vacuumize the refrigerant lines through the service port of the outdoor unit.

2. Open the stop valves of the outdoor unit completely.

This will completely connects the refrigerant lines of the indoor and outdoor units.

Handling of the stop valve is shown on the outdoor unit.

Note :

· Apply refrigerating machine oil over the flare seat surface. Do not apply to the threaded portion. (It will cause the flare nut to loosen.)

· Use two wrenches to tighten piping connection.

· Use leak detector or soapy water to check for gas leaks after connections are completed.

· For the insulation of the connection at the indoor side, make sure to use the attached insulation materials and

thoroughly follow the instruction shown in the manual.

· Always use a non-oxidizing brazing material when brazing the pipes.

Adjusting the amount of refrigerant

Check additional refrigerant charging amount referring to the procedure 2 below when the liquid pipe diameter of the main piping Ais larger than the standard size.

1 When the standard diameter pipe is used for the main piping A, calculate the additional refrigerant amount by

referring to <Table 2> as well as the 1:1 system.

2 When the liquid pipe diameter of the main piping A is one size larger than the standard size:

· When the extension pipe length (main piping + branch piping) does not exceeds 20m, adjustment of the

refrigerant is not necessary (charge-less).

· When the extension pipe length (main piping + branch piping) exceeds 20m, charge the amount of refrigerant

that is obtained by the formula shown in <Table 7>. If the calculation produces a negative number (i.e. a "minus" charge), additional charging is not necessary. Note: Apply 0 to L1 to L3 corresponding to the piping that are not used.

Correcting the capacity value

When calculating the lowered capacity by the extension pipe length, use the longest length between the indoor and the outdoor units.

Refrigerant collecting (pump down)

OFF

<SW4>

A Stop C operation B Cooling D Heating

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1 Before collecting the refrigerant, first make sure that the all of the SW5 DIP switches

for function changes on the control board of the outdoor unit are set to OFF. If all of the SW5 switches are not set to OFF, record the settings and then set all of the switches to OFF. Start collecting the refrigerant. After moving the unit to a new location and completing the test run, set the SW5 switches to the previously recorded settings.

Supply power (circuit breaker).

* When power is supplied, make sure that “CENTRALLY CONTROLLED” is not

displayed on the remote controller. If “CENTRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.

After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor (outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1 and LED2 on the control board of the outdoor unit are lit.

* Set the SWP switch (push-button type) to ON in order to perform refrigerant

collecting operation only when the unit is stopped. However, refrigerant collecting operation cannot be performed until compressor stops even if the unit is stopped. Wait three minutes until compressor is completely stopped and set the SWP switch to ON again.

4 As the unit automatically stops after two or three minutes of refrigerant

collecting operation (LED1 if not lit and LED2 is lit), be sure to quickly close the gas stop valve. If the unit stops while both LED1 and LED2 are lit, open the liquid valve completely, wait three minutes, then repeat the step 3.

* If the refrigerant collecting operation has been completed normally

(LED1 and LED2 are lit), the unit will remain stopped until the power supply is turned off.

5 Turn off the power supply (circuit breaker).

* Note that when the length of the extension piping is long, it may not be

possible to perform a pump-down operation.When performing the pumpdown operation, make sure that the low pressure is lowered to near 0 MPa (gauge).

Unit replacement operation

· This model will automatically begin the replacement operation after it has been installed when it enters the initialization phase for normal heating or cooling. Ho wever , the unit will not automatically perf orm the replacement operation if it is moved to a new location where it will be used with existing R22 refrigerant piping. Under such conditions, always use the SW8-2 operations to perform the replacement operation before beginning the test operation.

Some models can perform the replacement operation only by SW8-2 operation. Refer to the outdoor unit's Installation Manual for detail.

Replacement operation procedures (When moving the unit and connecting it to existing R22 piping.)

1 Supply power. 2

Set DIP switch SW8-2 on the control board of the outdoor unit to ON to start replacement operation. * The replacement operation is performed using the cooling system. Cool air will

flow from the indoor unit during the replacement operation.

* During the replacement operation,

and LED1 and LED2 on the control board of the outdoor unit flash together.

The duration of the replacement operation is determined by the length of the pip-

ing. Alwa ys perform the replacement operation f or longer than the stipulated time. * Always perform one of the following operations at the completion of the re-

placement operation. The replacement operation will end and the unit will automatically stop.

TEST RUN

is displayed on the remote controller

(1)Set SW8-2 from ON to OFF. (When ending a replacement operation of less

than 2 hours.)

· Each time SW8-2 is set from OFF to ON, the replacement operation can be started. Always perf orm the replacement operation for longer than the stipulated time. Required replacement operation times

Piping Length

0 to 20 meters 30 minutes or more 21 to 30 meters 45 minutes or more 31 to 70 meters 60 minutes or more

(2)The replacement operation will automatically stop after 2 hours. (It will end with

SW8-2 still in the ON position.)

· When the replacement operation has ended automatically after 2 hours of operation, there is no need to set SW8-2 from ON to OFF; normal air conditioning operations can bestarted with the SW8-2 being set to ON.However, to repeat the replacement operation, SW8-2 will have to be returned to OFF and then set to ON.

* If the indoor temperature is below 15:, the compressor will operate

intermittently but the unit is not faulty.

Replacement

Operation Time

Start and finish of test run

• Operation from the indoor unit

Execute the test run using the installation manual for the indoor unit.

• Operation from the outdoor unit By using the DIP switch SW4 on the control board of the outdoor unit, test run can be started and finished, and its operation mode (cooling/heating) can be set up.

1Set the operation mode (cooling/heating) using SW4-2. 2Turn on SW4-1 to start test run with the operation mode set by SW4-2. 3Turn off SW4-1 to finish the test run.

• There may be a faint knocking sound around the machine room after power is supplied, but this is no problem with product because the linear expansion pipe is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor starts operating, but this is no problem with product because the check valve, itself, generates the sound because pressure difference is small in the refrigerant circuit.

Note: The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1, change the operation mode and restart the test run by SW4-1.)

13 TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The inferior phenomenon is reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action according to “13-4. SELF-DIAGNOSIS ACTION TABLE”.

Conduct trouble shooting and ascertain the cause of the inferior phenomenon according to “13-5. TROUBLESHOOTING BY INFERIOR PHENOMENA”.

The inferior phenomenon is not reoccurring.

Logged

Not logged

1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise and etc. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the inferior phenomenon occurred, matters related to wiring and etc. 2Reset error code logs and restart the unit after finishing service. 3There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

1Re-check the abnormal symptom. 2Conduct trouble shooting and ascertain the cause of the

inferior phenomenon according to “13-5.

TROUBLE SHOOTING BY INFERIOR PHENOMENA”. 3Continue to operate unit for the time being if the cause is not ascertained. 4There is no abnormality concerning of parts such as electrical component, controller circuit board, remote controller and etc.

13-1. TROUBLESHOOTING

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the inferior phenomenon is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.

13-2. CHECK POINT UNDER TEST RUN

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

TEST RUN button

TEST RUN display

LIQUID PIPE TEMPERATURE display

(MA remote controller)

(1) Before test run

• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-

age, loosened connections and incorrect polarity.

• Measure impedance between the ground and the power supply terminal block(L, N) on the outdoor unit by 500V Merger and check that it is 1.0M" or over.

wDon’t use 500V Merger to indoor/outdoor connecting wire terminal block(S1, S2, S3) and remote controller terminal block

(1, 2). This may cause malfunction.

• Make sure that test run switch (SW4) is set to OFF before turning on power supply.

• Make sure that all of the SW5 switches for function changes on the control board of the outdoor unit are set to OFF. If all of

the SW5 switches are not set to OFF, record the settings and then set all of the switches to OFF. And perform emergency operation. After finishing emergency operation, set the SW5 switches to the recorded settings.

• Turn on power supply twelve hours before test run in order to protect compressor.

• For specific models which requires higher ceiling settings or auto-recovery feature from power failure, make proper changes

of settings referring to the description of “Selection of Functions through Remote Controller”.

Make sure to read operation manual before test run. (Especially items to secure safety.)

13-2-1. Test run by remote controller

Operating procedures

1. Turn on the main power supply.

2. Press TEST button twice.

3. Press OPERATION SWITCH button.

4. Press AIR DIRECTION

5. Check the outdoor unit fan for correct running.

6. Press the ON/OFF button to reset the test run in progress.

7. Turn off the main power supply.

B button.

While the room temperature display on the remote controller is “H0”, the remote controller is disabled. Wait until “H0” disappears before using remote controller. “H0” appears for about 2 minutes after power supply is turned on. w1

The TEST appears on the screen. Cooling mode:

Heating mode: Check if warm air blows. (It takes a little while until warm air blows.)

Check for correct motion of auto-vanes. The outdoor unit features automatic capacity control to

provide optimum fan speeds. Therefore, the fan keeps running at a low speed to meet the current outside air condition unless it exceeds its available maximum power. Then, in actuality, the fan may stop or run in the reverse direction depending on the outside air, but this does not mean malfunction.

Check if cool air blows and water is drained.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after two hours.

• The room temperature display section shows the pipe temperature of indoor units during the test run.

• Check that all the indoor units are running properly in case of simultaneous twin and triple operation. Malfunctions may not be displayed regardless of incorrect wiring.

w1 After turning on the power supply, the system will go into startup mode, “H0” will blink on the display section of the room

temperature, and lamp(red) of the remote controller will flash. As to INDOOR BOARD LED, LED1 and LED2 will be lit up in case the address is 0, or turned off in case the address is not

0. LED3 will blink. As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will light up. (After the startup mode of the system finishes, LED2(red) will be turned off.)

In case OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations doesn’t function correctly, the causes written below should be considered. Find causes from the symptoms. The below symptoms are under test run mode. “startup” in the table means the display status of w1 written above.

Symptoms in test run mode

Remote Controller Display

Remote controller displays “H0”, and cannot be operated.

After power is turned on, “H0” is displayed for 3 minutes, then error code is displayed.

No display appears even when remote controller operation switch is turned on. (Operation lamp does not light up.)

Display appears but soon disappears even when remote controller is operated.

OUTDOOR BOARD LED Display

< > indicates digital display.

After “startup” is displayed, only green lights up. <00> After “startup” is displayed, green(once) and red(once) blink alternately. <F1>

After “startup” is displayed, green(once) and red(twice) blink alternately. <F3, F4, F9>

After “startup” is displayed, green(twice) and red(once) blink

alternately. <EA. Eb> After “startup” is displayed, only

green lights up. <00> After “startup” is displayed, only

green lights up. <00>

• After power is turned on, “H0” is displayed for 2 minutes during system startup. (Normal)

• Incorrect connection of outdoor terminal block (L, N and S1, S2, S3.)

• Outdoor unit’s safeguard installation connector is open.

• Incorrect wiring between the indoor and outdoor unit (Polarity is wrong for S1, S2, S3.)

• Remote controller transmission wire short.

• There is no outdoor unit of address 0. (Address is other than 0.)

• Remote controller transmission wire burnout.

• After canceling function selection, operation is not possible for about 30 seconds. (Normal)

Cause

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