Mitsubishi Electric MXZ-8A140VA Manual de funcionamiento

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

CONTENTS

1. TECHNICAL CHANGES···································2

2. SAFETY PRECAUTION····································3

3. OVERVIEW OF UNITS······································6

4. SPECIFICATIONS···········································14

5. DATA ·······························································16

6. OUTLINES AND DIMENSIONS······················31

7. WIRING DIAGRAM·········································34

NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION

···38

9. TROUBLESHOOTING ····································40

10. ELECTRICAL WIRING····································88

11. WIRING SPECIFICATIONS·····························89

12. SYSTEM CONTROL ·······································90

13. REFRIGERANT PIPING TASK·······················92

14. DISASSEMBLY PROCEDURE ·······················95

15. PARTS LIST ··················································102

16. RoHS PARTS LIST ·······································109

17. OPTIONAL PARTS ··························Back cover

OUTDOOR UNIT

BRANCH BOX

No. OC316

REVISED EDITION-D

[Model name] [Service Ref.]

MXZ-8A140VA MXZ-8A140VA

MXZ-8A140VA1

MXZ-8A140VA2

MXZ-8A140VA3

PAC-AK50BC PAC-AK50BC

PAC-AK30BC PAC-AK30BC

(Indispensable optional parts

for MXZ-8A140VA)

Model name

indication

HFC

utilized

R410A

Revision:

· MXZ-8A140VA3is added in

REVISED EDITION-D.

· Some descriptions have

been modified.

· Please void OC316

REVISED EDITION-C.

August 2007

NOTE:

·This service manual

describes technical data of

outdoor unit and branch box.

As for indoor units, refer to

its service manual.

• RoHS compliant products

have <G> mark on the

spec name plate.

• For servicing RoHS com-

pliant products, refer to the

RoHS PARTS LIST.

OC316D--1.qxp 07.8.24 2:10 PM Page 1

1TECHNICAL CHANGES

MXZ-8A140VA2➔MXZ-8A140VA3

The parts below have been changed.

• THERMISTOR (DISCHARGE/TH4) (Connector change)

• CONTROLLER CIRCUIT BOARD(C.B)

• NOISE FILTER CIRCUIT BOARD(N.F.)

• ACTIVE FILTER MODULE(ACTM)

• RELAY(52C), RESITOR(RS)(including N.F.)

MXZ-8A140VA1➔MXZ-8A140VA2

The parts below have been changed.

• FOUR-WAY VALVE AND COIL(21S4)

• CONTROLLER CIRCUIT BOARD(C.B.)

• FAN MOTOR(MF1, MF2)

• SOLENOID VALVE AND COIL(SV2)

MXZ-8A140VA ➔MXZ-8A140VA1

The parts below have been changed.

• POWER CIRCUIT BOARD(P.B.)

• NOISE FILTER CIRCUIT BOARD(N.F.)

• THERMISTOR (OUTDOOR / TH7)

(Length change)

OC316D--1.qxp 07.8.24 2:10 PM Page 2

2SAFETY PRECAUTION

Cautions for units utilizing refrigerant R410A

2-1. ALWAYS OBSERVE FOR SAFETY

Use new refrigerant pipes.

Make sure that the inside and outside of refrige-

rant 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.

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 refrige-

rant 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 enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera-

nt 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 deterio-

ration of refrigerant oil etc.

If dirt, dust or moisture enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

If large amount of mineral oil enters, that can cause deterio-

ration 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.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Before obtaining access to terminal, all supply

circuit must be disconnected.

OC316D--1.qxp 07.8.24 2:10 PM Page 3

Gravimeter

Unit

[3] Service tools

(1) Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

1Gauge manifold ·Only for R410A

·Use the existing fitting specifications. (UNF1/2)

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

2Charge hose ·Only for R410A

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

3Electronic scale

4Gas leak detector ·Use the detector for R134a, R407C or R410A.

5Adaptor for reverse flow check ·Attach on vacuum pump.

6Refrigerant charge base

7Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

8Refrigerant recovery equipment

[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.)

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely.

(2) Do not release refrigerant in the air.

(3) After completing service, charge the cycle with specified amount of refrigerant.

(4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

OC316D--1.qxp 07.8.24 2:10 PM Page 4

(2) Cautions for refrigerant piping work

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is 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 refriger-

ants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been speci-

fied 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.

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

1/4

3/8

1/2

5/8

3/4

6.35

9.52

12.70

15.88

19.05

0.8

1.0

—

0.8

1.0

Nominal

dimensions(inch)

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(inch)

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(inch)

Flare nut dimensions Outside

diameter Dimension B (mm)

R410A 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 thermis-

tor vacuum gauge and

vacuum valve

Charging cylinder

Air purge, refrigerant charge

and operation check

Gas leak check

Refrigerant recovery

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

Refrigerant charge

Check the degree of vacuum. (Vacuum

valve prevents back flow of oil and refri-

gerant to thermistor vacuum gauge)

Refrigerant charge

Tool exclusive for R410A

Tool for HFC refrigerant

Tool exclusive for R410A

Ester oil and alkylbenzene

oil (minimum amount)

Tool exclusive for R410A

Tools for other refrigerants can

be used if equipped with adop-

ter 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

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.

Dimension A

Dimension B

OC316D--1.qxp 07.8.24 2:10 PM Page 5

3OVERVIEW OF UNITS

3-1. CONSTRUCTION OF SYSTEM

5HP

Rated capacity (kW)

(Cooling/Heating) 14.0/16.0

MXZ-8A140VA/ MXZ-8A140VA1/ MXZ-8A140VA2/ MXZ-8A140VA3

R410A

Indoor unit

that can be

connected

Branch box

that can be

connected

Capacity

Number of units

Total system wide capacity

Type 22 ~ Type 80

2 ~ 8 units

1 ~ 2 units

31 ~ 132 % of outdoor unit capacity (4.4 kW ~ 18.5 kW)

Number of units

Outdoor unit

Ceiling

concealed

4-way

ceiling cassette

Wall

mounted

Model type Model name

deluxe

standard

Low static pressure

High static pressure

2 by 2 type

standard

MSZ-FA25/35, FD25/35

MSZ-GA22/25/35/50/60/71/80, GB50, GC22/25/35

MSXZ-DB25/35

SEZ-KC25, KA35/50/60/71, KD25/35/50/60/71

MEXZ-GA25/35/50/60

PEAD-RP50/60/71EA.UK

PEAD-RP60/71GA.UK

PEA-RP71EA

SLZ-KA25/35/50

PLA-RP35/50/60/71BA(.UK)

MFZ-KA25/35/50

Floor standing

Capacity class

2.2kW 2.5kW 3.5kW 5.0kW 6.0kW 7.1kW 8.0kW

Connectable indoor unit lineup (Heat pump inverter type)

<NOTE> The lineup of a connectable indoor unit depends on a district/areas/country.

Branch box PAC-AK50BC

5 branches

(MAX. 5 units)

PAC-AK30BC

3 branches

(MAX. 3 units)

Number of branches

Indoor unit that

can be connected

( )

wMax. 2 branch boxes can be connected to 1 outdoor unit.

wAccording to the connection method, you can choose the favorite one.

2- branch pipe (joint) : Optional parts

In case of using 1- branch box

In case of using 2- branch boxes

No need

Model name Connection method

flare

brazing

MSDD-50AR-E

MSDD-50BR-E

Option Optional accessories of indoor units and outdoor units are available.

CAUTION : The indoor unit which rated capability exceeds

8.0kW (80 type) can NOT be connected.

OC316D--1.qxp 07.8.24 2:10 PM Page 6

Indoor unit (Ceiling concealed type)

Indoor unit

(Wall mounted type)

Outdoor unit Branch Box

3-2. SYSTEM OUTLINE

The additional connection of the Branch Box together with employment of the compact trunk-looking outdoor unit can suc-

cessfully realizes a long distance piping for big houses. Equipped with a microcomputer, the Branch Box can translate the

transmission signal of indoor units to achieve the optimum control.

3-2-1. System example

3-2-2. Method for identifying

■Outdoor unit

MX Z - 8A140 V A

Model type

Power supply

V: Single phase 220/230/240V 50Hz

220V 60Hz

Multi type heat pump

inverter outdoor unit

Indicates equivalent to rated cooling capacity.

(O0.1kW)

Number of connectable indoor units (MAX.)

Control and refrigerant

A : New A control and R410A

PAC - AK 50 BC

(Indispensable)

Optional parts

Symbol of factory

Branch box (Controller)

Number of branches

50 : 5 branches

30 : 3 branches

Applicable refrigerant

A : R410A

■Branch box

OC316D--1.qxp 07.8.24 2:10 PM Page 7

3-3. TYPICAL COMBINATION EXAMPLE

Branch box is located INSIDE of condominium

Branch box

(Inside)

Installing branch box indoors

Only 1 piping is required between the outdoor and

indoor offering a fine external view.

Branch box (5 branch type)

Outdoor unit

SEZ-60 MSZ-35 MSZ-35 MSZ-25 MSZ-25

Living Dining Bedroom (1) Bedroom (2)

Master

bedroom

Indoor unit type (capacity class)

Rated capacity (cooling) (kW)

2.2

2.5

3.5

5.0

7.1

6.0

8.0

■System example of 5 indoor units

■Verification

The rated capacity should be determined by observing the table below. The unit’s quantities are limited in 2 to 8 units.

For the next step, make sure that the selected total rated capacity is in a range of 4.4 ~ 18.5kW.

The total indoor unit capacity should be within the outdoor units. (=14.0kW is preferred).

Combination of excessive indoor units and an outdoor unit may reduce the capacity of each indoor unit.

The rated indoor capacity is as the table below.

Example:

Total rated capacity

18.0 18.5kW

MSZ-25 =2.5

SEZ-60 = 6.0

MSZ-35 = 3.5

MSZ-25 = 2.5

OC316D--1.qxp 07.8.24 2:10 PM Page 8

3-4. INSTALLATION

3-4-1. Outdoor unit installation location

For best performance, select proper position.

● Avoid places where combustible gas may be generated or leak.

● Avoid direct sunlight or other sources of heat.

● Install sunshade to protect the outdoor unit if direct sunlight hits the unit.

● Install the outdoor unit with enough distance between neighbours as operation noise may disturb the neighbours.

● Avoid the position that the unit is covered by snow or snow blows directly against the air outlet. The snow block or blow

will reduce the airflow of the outdoor unit.

In the areas of heavy snow, special countermeasures must be taken at installation to protect the outdoor unit from

malfunction caused by snow.

● Select a location permitting easy wiring and pipe access to the power source and indoor unit.

● Drain water must be drained freely during operation. Check for draining.

3-4-2. Ventilation and service space

(1)Windy location installation

When installing the outdoor unit on a rooftop or other location unprotected from the wind, situate the air outlet of the unit so

that it is not directly exposed to strong winds. Strong wind entering the air outlet may impede the normal airflow and a

malfunction may result.

The following shows 3 examples of precautions against strong winds.

● Face the air outlet towards the nearest available wall about 50 cm away from the wall. (Fig. 2-1)

● Install an optional air guide if the unit is installed in a location where strong winds from a typhoon, etc. may directly enter

the air outlet. (Fig. 2-2)

AAir guide

● Position the unit so that the air outlet blows perpendicularly to the seasonal wind direction, if possible. (Fig. 2-3)

BWind direction

Fig.2-1

Fig.2-2 Fig.2-3

OC316D--1.qxp 07.8.24 2:10 PM Page 9

(2) When installing a single outdoor unit

Minimum dimensions are as follows, except for Max., meaning Maximum dimensions, indicated.

Refer to the figures for each case.

● Obstacles at rear only (Fig. 2-4)

● Obstacles at rear and above only (Fig. 2-5)

· Do not install the optional air outlet guides for upward airflow.

● Obstacles at rear and sides only (Fig. 2-6)

● Obstacles at front only (Fig. 2-7)

wWhen using an optional air outlet guide, the clearance is 500 mm or more.

●Obstacles at front and rear only (Fig. 2-8)

wWhen using an optional air outlet guide, the clearance is 500 mm or more.

●Obstacles at rear, sides, and above only (Fig. 2-9)

· Do not install the optional air outlet guides for upward airflow.

150

300

1000

Max. 500

150

1000

250

1500

500

Max. 500

1000

200

300

200

Fig.2-4

Fig.2-8Fig.2-7

Fig.2-5 Fig.2-6

Fig.2-9

unit : mm

OC316D--1.qxp 07.8.24 2:10 PM Page 10

Otros manuales para MXZ-8A140VA

Este manual sirve para los siguientes modelos

Tabla de contenidos

Otros manuales de Acondicionador de aire de Mitsubishi Electric

Mitsubishi Electric

Mitsubishi Electric PUMY-P100 Manual de usuario

Mitsubishi Electric

Mitsubishi Electric MSZ-HJ25 Manual de usuario

Mitsubishi Electric

Mitsubishi Electric MSZ-HM09NA Manual de usuario

Mitsubishi Electric

Mitsubishi Electric CITY MULTI PLFY-P VFM-E1 Series Manual de usuario

Mitsubishi Electric

Mitsubishi Electric MS-GA50VB E1 WH Manual de usuario

Mitsubishi Electric

Mitsubishi Electric Mr.SLIM PUHZ-P V Series Manual de usuario

Mitsubishi Electric

Mitsubishi Electric PLFY-P08NFMU-E Manual de funcionamiento

Mitsubishi Electric

Mitsubishi Electric City Multi PCFY-P40VKM-E Manual de usuario

Mitsubishi Electric

Mitsubishi Electric SEZ-A12 Manual de usuario

Mitsubishi Electric

Mitsubishi Electric AE-200A Manual de usuario

Mitsubishi Electric

Mitsubishi Electric PLA-RP.BA Series Manual de usuario

Mitsubishi Electric

Mitsubishi Electric CITY MULTI PURY-P-THMU-A Manual de usuario

Mitsubishi Electric

Mitsubishi Electric American Standard NAXWEL09A112A Series Manual de usuario

Mitsubishi Electric

Mitsubishi Electric MSZ-SF15VA Manual de usuario

Mitsubishi Electric

Mitsubishi Electric JG79B594H07 Manual de usuario

Mitsubishi Electric

Mitsubishi Electric City Multi PLFY-P VEM-E Series Manual de usuario

Mitsubishi Electric

Mitsubishi Electric MXZ-2C30VA Manual de usuario

Mitsubishi Electric

Mitsubishi Electric PUHZ-RP35VHA4 Manual de usuario

Mitsubishi Electric

Mitsubishi Electric PLA-RP35BAR1 Manual de usuario

Mitsubishi Electric

Mitsubishi Electric Y Series Manual de usuario

Mitsubishi Electric

Mitsubishi Electric Mr. Slim PCA-M KA Series Manual de usuario

Mitsubishi Electric

Mitsubishi Electric MSZ-EF18VE2W Manual de usuario

Mitsubishi Electric

Mitsubishi Electric PEA-RP200 WJA Manual de usuario

Mitsubishi Electric

Mitsubishi Electric MSZ-A09NA Series Manual de usuario

Manuales populares de Acondicionador de aire de otras marcas

Spheros

Spheros CC 355 Manual de usuario

Bosch

Bosch Climate 5000 SCI 24 CAS/ OU- OUE Manual de usuario

Panasonic

Panasonic CS-E12HKEW Manual de usuario

nedis

nedis ACMB1WT7 Manual de usuario

Samsung

Samsung AR KV Series Guía

Daikin

Daikin FCFV50A Manual de usuario

Fujitsu

Fujitsu Inverter ASBA30JFC Manual de usuario

Toshiba

Toshiba RAS-M10SMUV-E Manual de usuario

Daikin

Daikin FXLQ20MAVE Manual de usuario

Hitachi

Hitachi RAS-E24CAK Manual de usuario

CIAT

CIAT Magister 2 Series Guía

Bestron

Bestron AAC6000 Manual de usuario

Hisense

Hisense 7K Manual técnico

Frigidaire

Frigidaire FFRE0533S1E0 Manual de usuario

Samsung

Samsung AS09HM3N Manual de usuario

Frigidaire

Frigidaire CRA073PU11 Manual del propietario

Soleus Air

Soleus Air GB-PAC-08E4 Manual de usuario

McQuay

McQuay MCK020A Manual de usuario