Mitsubishi Electric MUCFH-A18WV-E1 Manuale utente

SERVICE MANUAL

Wireless type

Models

MUCFH-A18WV -

MUCFH-A24WV - E1

No. OB337

REVISED EDITION-B

FLOOR AND CEILING TYPE AIR CONDITIONERS

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················5

3. SPECIFICATION·················································5

4. NOISE CRITERIA CURVES·······························6

5. OUTLINES AND DIMENSIONS ·························7

6. WIRING DIAGRAM ············································8

7. REFRIGERANT SYSTEM DIAGRAM················9

8. PERFORMANCE CURVES······························10

9. ACTUATOR CONTROL····································18

10. SERVICE FUNCTIONS·····································18

11. TROUBLESHOOTING······································19

12. DISASSEMBLY INSTRUCTIONS·····················29

13. PARTS LIST······················································33

MUCFH-A18WV - E1

Indication of model name

NOTE:

•This service manual describes technical data of outdoor units.

As for indoor units MCFH-A18WV- and MCFH-A24WV- , refer to the

service manual OB336. E1E1

HFC

utilized

R410A

Revision B:

● Part number of 4-WAY VALVE has been

corrected.

Please void OB337 REVISED EDITION-A.

OB337B--1.qxp 05.7.6 11:00 AM Page 1

TECHNICAL CHANGES

MUH-A18WV - ➔ MUCFH-A18WV -

1. Capillary tube has been changed.

2. Refrigerant filling capacity has been changed. (1.75kg ➔ 1.85kg)

MUH-A24WV - ➔ MUCFH-A24WV -

1. Capillary tube has been changed.

2. Refrigerant filling capacity has been changed. (2.15kg ➔ 2.20kg)

E1E1

Refrigerating

oil

Refrigerant

New refrigerant

R410A

HFC-32: HFC-125 (50%:50%)

Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-51.4

1.557

Non combustible

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

86.5

-40.8

0.94

44.4

Non combustible

0.055

1700

Gas phase

Possible

Compatible oil

Light yellow

Non

Refrigerant

Composition (Ratio)

Refrigerant handling

Chlorine

Safety group (ASHRAE)

Molecular weight

Boiling point (:)

Steam pressure [25:](Mpa)

Saturated steam density [25:](Kg/K)

Combustibility

ODP w1

GWP w2

Refrigerant charge method

Additional charge on leakage

Kind

Color

Smell

w1:Ozone Destruction Parameter : based on CFC-11

w2 :Global Warmth Parameter : based on CO2

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

• This room air conditioner adopts an HFC refrigerant (R410A) which never destroys the ozone layer.

• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners.

1As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/

materials are required. Refer to the table below.

2Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and

installation, since it is more susceptible to contaminations than R22.

3For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant

piping.)

4Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent

composition change.

Revision A:

•Power input of SPECIFICATION has been modified.

Revision B:

•Part number of 4-WAY VALVE has been corrected.

Model Revise point Part Name

CorrectIncorrect

Part Number

13-1. No.13

13-3. No.9

4-WAY VALVE

E02 891 961

E02 679 961

MUCFH-A18WV - E1

MUCFH-A24WV - E1

OB337B--1.qxp 05.7.6 11:00 AM Page 2

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])

New Specification Current Specification

The incompatible refrigerating oil easily separates from

refrigerant and is in the upper layer inside the suction muffler.

Raising position of the oil back hole enables to back the

refrigerating oil of the upper layer to flow back to the

compressor.

Since refrigerant and refrigerating oil are compatible each,

refrigerating oil backs to the compressor through the lower

position oil back hole.

Compressor

Suction muffler

Oil back hole

Refrigerating oil

Refrigerant

Compressor

Suction muffler

Oil back hole

Refrigerating oil /Refrigerant

Compressor

-30 -20 -10 0 10 20 30 40 50 60

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

(MPa [Gauge])

R410A

R22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(:)

NOTE : The unit of pressure has been changed to MPa on the

international system of units(SI unit system).

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])

R410A tools Can R22 tools be used?

Gas leak detector

R410A has high pressures beyond the measurement range of existing

gauges. Port diameters have been changed to prevent any other refrigerant

from being charged into the unit.

Hose material and cap size have been changed to improve the pressure

resistance.

Dedicated for HFC refrigerant.

6.35 mm and 9.52 mm

Description

Clamp bar hole has been enlarged to reinforce the spring strength in the tool.

Provided for flaring work (to be used with R22 flare tool).

Provided to prevent the back flow of oil. This adapter enables you to use

vacuum pumps.

It is difficult to measure R410Awith a charging cylinder because the

refrigerant bubbles due to high pressure and high-speed vaporization

Yes

New

Gauge manifold

Charge hose

Torque wrench

Flare tool

Flare gauge

Vacuum pump

adapter

Electronic scale for

refrigerant charging

No : Not Substitutable for R410A Yes : Substitutable for R410A

No 12.7 mm and 15.88 mm

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.

The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being

charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

OB337B--1.qxp 05.7.6 11:00 AM Page 3

R410A

Pipe diameter

6.35

9.52

12.7

15.88

Dimension of flare nut

R22

2Flaring work and flare nut

Flaring work for R410A pipe differs from that for R22 pipe.

For details of flaring work, refer to Installation manual “FLARING WORK”.

Electronic scale for refrigerant charging

Outdoor unit

Refrigerant gas

cylinder

operating valve

Refrigerant gas cylinder

for R410A with siphon

Refrigerant (liquid)

Service port

Gauge manifold

valve (for R410A)

Union

Liquid pipe

Gas pipe

Stop valve

Indoor unit

Charge hose (for R410A)

3.Refrigerant oil

Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.

4.Air purge

• Do not discharge the refrigerant into the atmosphere.

Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant

circuit.

• Use the vacuum pump for air purging for the purpose of environmental protection.

5.Additional charge

For additional charging, charge the refrigerant from liquid phase of the gas cylinder.

If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the

outdoor unit. In this case, ability of the refrigerating cycle decreases or normal operation can be impossible. However,

charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

2.Refrigerant piping

1Specifications

Use the refrigerant pipes that meet the following specifications.

• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88).

Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88), as the pressure resistance is

insufficient.

Wall

thickness

Outside diameter

Pipe mm

For liquid

For gas

6.35

9.52

12.7

15.88

0.8 mm

1.0 mm

Heat resisting foam plastic

Specific gravity 0.045 Thickness 8 mm

Insulation material

OB337B--1.qxp 05.7.6 11:00 AM Page 4

PART NAMES AND FUNCTIONS

MUCFH-A18WV - E1

Air inlet

Air outlet

Drain outlet

Piping

Drain hose

MUCFH-A24WV - E1

ACCESSORIES

Item

Drain socket

Drain cap [33

Drain cap [16

Q'ty

–

MUCFH-A18WV- E1 MUCFH-A24WV- E1

Air inlet

Air outlet

(back and side)

SPECIFICATION

Outdoor model

Function

Power supply

Capacity

Dehumidification

Air flow(High)

Power outlet

Running current

Power input

Power factor

Starting current

Compressor motor current

Fan motor current

Model

Output

Winding

resistance(at 20:)

Model

Winding

resistance(at 20:)

Dimensions WOHOD

Weight

Sound level(High)

Fan speed(High)

Fan speed regulator

Refrigerant filling

capacity(R410A)

Refrigerating oil (Model)

Thermistor RT61(at 0:)

r/h

K/h

rpm

MUCFH-A18WV - E1

Single phase

230V, 50Hz

2,196

0.39

RN196VHSHT

1,300

C-R 1.80

C-S 3.00

RA6V50-OG

WHT-BLK 116

BLK-RED 111

850o605o290

828

1.85

520 (NEO22)

33.18

Cooling

4.8

2.4

8.01

1,730

7.62

2.65

Heating

5.0

—

8.38

1,810

7.99

2.65

MUCFH-A24WV - E1

Single phase

230V, 50Hz

2,760

0.58

NN29VBAHT

1,900

C-R 0.80

C-S 1.64

RA6V85-AB

WHT-BLK 63 BLK-YLW 30

YLW-RED 63

840o850o330

730

2.20

1,200 (NEO22)

33.18

Cooling

6.0

3.1

10.51

2,370

9.93

2.45

Heating

6.8

—

11.71

2,640

11.13

2.50

Electrical

data

Compressor

Fan

motor

Special

remarks

Coefficient of performance(C.O.P)

Capacity

NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C WB 15.5°C

Outdoor DB35°C WB(24°C) Outdoor DB 7°C WB 6°C

Indoor-Outdoor piping length : 5m

OUTDOOR UNIT

OB337B--1.qxp 05.7.6 11:00 AM Page 5

NOISE CRITERIA CURVES

MUCFH-A18WV - E1

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

High

FAN SPEED

SPL(dB(A))LINE

Test conditions,

Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

MUCFH-A24WV - E1

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

High

FAN SPEED

SPL(dB(A))LINE

Test conditions,

Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

OUTDOORUNIT

MICROPHONE

OB337B--1.qxp 05.7.6 11:00 AM Page 6

OUTLINES AND DIMENSIONS

MUCFH-A24WV - E1

Unit: mm

MUCFH-A18WV - E1

100mm or more

350mm or more

500mm or more

REQUIRED SPACE

Drainage

3holes [33 Air out

Air in

Service panel

Liquid refrigerant

pipe joint

Refregerant pipe

(flared) [6.35

Gas refregerant

pipe joint

Refregerant pipe

(flared) [12.7

35-

30-

100

161

157

850

500

183

20 292

605 248

350

290

310

345

355

Drainage

hole [16.2

30-

35-

155

198

515

299

330

360

850

430

500

121

840

Open as a rule

500mm or more if

the front and both

sides are open

100mm or more

200mm or more if

there are obstacles

to both sides

Open as a rule

500mm or more if the back,

both sides and top are open 350mm or more

100mm or more

Liquid refrigerant

pipe joint

Refrigerant pipe

(flared) [6.35

Service panel

Gas refrigerant

pipe joint

Refrigerant pipe

(flared) [15.88

REQUIRED SPACE

OUTDOOR UNIT

OB337B--1.qxp 05.7.6 11:00 AM Page 7

WIRING DIAGRAM

MUCFH-A24WV - E1 MODEL WIRING DIAGRAM

OUTDOOR UNIT

DEICER

P.C. BOARD

T61

YLW

BLK

WHT

RED

BRN

CN730

YLW

BLK

WHT

CIRCUIT BREAKER CN721

352C 4

RED C2

ORN

A1 A2

BLU 52C

DSAR

TO INDOOR UNIT CONNECTING

12V

WHT

BLKS

RED

BLU

NR61 3

BLU

TB1

TB2

GRN/YLW

POWER SUPPLY

~ /N 230V 50Hz

CN661

RT61

X52X62 X62 1

21S4

BLU

BRN

BLU

BRN

SR61

COM NO

F61

TAB52

X52

CN711

123

ORN

RED

3456

COM

NOTES: 1.Use copper conductors only (For field wiring).

2.Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers (3,N).

3.Symbols below indicate.

: Terminal block, : Connector

SYMBOL

DSAR

F61

NR61

RT61

SR61

TB1

TB2

T61

X52

X62

21S4

52C

NAME

COMPRESSOR CAPACITOR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

FUSE (3.15A)

COMPRESSOR (INNER PROTECTOR)

OUTDOOR FAN MOTOR (INNER PROTECTOR)

VARISTOR

DEFROST THERMISTOR

SOLID STATE RELAY

TERMINAL BLOCK

TRANSFORMER

CONTACTOR

R. V. COIL RELAY

R. V. COIL

COMPRESSOR CONTACTOR

MUCFH-A18WV - E1 MODEL WIRING DIAGRAM

OUTDOOR UNIT

CN661

CN721

21S4

SR62

SR61

TAB20

GRN/YLW

BLU

CIRCUIT BREAKER

POWER SUPPLY BLU

BRN

DSAR

BLK

BRN

RED

DEICER P.C.BOARD

BLK

RED

WHT

CN730

RT61

BLK

RED

WHT

12V

CONNECTING

INDOOR UNIT

TB2

TB1

~ /N

NR61

F61

T61

C65

CN711

52C

230V 50Hz

234

WHT

BLK

RED

ORN

1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring)

3.Symbols below indicate. : Connector

: Terminal block

NOTES:

SYMBOL

C65

DSAR

F61

NAME

COMPRESSOR CAPACITOR

OUTDOOR FAN CAPACITOR

SURGE ABSORBER

FUSE (2A)

COMPRESOR (INNER PROTECTOR)

SYMBOL

NR61

RT61

SR61,SR62

T61

NAME

OUTDOOR FAN MOTOR (INNER PROTECTOR)

VARISTOR

DEFROST THERMISTOR

SOLID STATE RELAY

TRANSFORMER

SYMBOL

TB1,TB2

21S4

52C

NAME

TERMINAL BLOCK

R.V. COIL

COMPRESSOR CONTACTOR

OB337B--1.qxp 05.7.6 11:00 AM Page 8

REFRIGERANT SYSTEM DIAGRAM7

MUCFH-A18WV - E1

OUTDOOR UNIT

Refrigerant pipe [12.7

(with heat insulator)

Flared connection

Refrigerant pipe[6.35

(with heat insulator)

Stop

valve

Receiver

Check valve

Capillary tube

[3.0o[1.6o650

Capillary tube

[3.0o[1.6o750

(2 pcs)

Compressor

Stop valve

(with service port) Outdoor

heat

exchanger

Defrost

thermistor

RT61

R.V. coil

Heating ON

Cooling OFF

Refrigerant flow in cooling

Refrigerant flow in heating

Oil separator

#100

4- way valve

MUCFH-A24WV - E1

OUTDOOR UNIT

Refrigerant pipe [15.88

(with heat insulator)

Flared connection

Refrigerant pipe [6.35

(with heat insulator)

Stop valve

Receiver

Check valve

Capillary tube

[3.0X[2.0X800

Defrost

thermistor

RT61

Compressor

Stop valve

(with service port) Outdoor

heat

exchanger

Refrigerant flow in cooling

Refrigerant flow in heating

Muffler

#100

4- way valve

[3.0X[2.0X400

Capillary tube

Unit:mm

R.V. coil

Heating ON

Cooling OFF

Capillary tube

[3.0o[1.6o500

Capillary tube

[2.5o[0.6o1,000

Muffler

Strainer

#100

Strainer

#100

OB337B--1.qxp 05.7.6 11:00 AM Page 9

Model

A: Refrigerant piping Max.length 25m

WMax. Height

difference

10m

MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

MUCFH-A18WV -

MUCFH-A24WV - E1

Refrigerant piping

MAX. length :mm

Piping size O.D. : mm

Gas Liquid

{12.7 {6.35

wIt does not matter which unit is higher.

Models Outdoor unit:

precharged

1,850

2,200

Refrigerant piping length (one way)

10m

15m

160

20m

260

25m

360

Calculation : ✕g=20g/m✕(Refrigerant piping length (m)-7)

If pipe length exceeds 7m, additional refrigerant (R410A) charge is required.

ADDITIONAL REFRIGERANT CHARGE (R410A : g)

MUCFH-A18WV -

MUCFH-A24WV - E1

{15.88

PERFORMANCE CURVES

The standard data contained in these specifications apply only to the operation of the air conditioner under normal condition.

Operating conditions vary according to the areas where these units are installed. The following information has been provided

to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

198~264V, 50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

COOLING

(1) Indoor intake air wet-bulb temperature : ˚CWB

(2) Indoor outlet air wet-bulb temperature : ˚CWB

(3) Outdoor intake air dry-bulb temperature : ˚CDB

(4) Total input : W

Indoor air wet/dry-bulb temperature difference on the left side of the chart on next page shows the difference between

the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at

service.

HEATING

(1) Indoor intake air dry-bulb temperature : ˚CDB

(2) Indoor outlet air dry-bulb temperature : ˚CDB

(3) Outdoor intake air wet-bulb temperature : ˚CWB

(4) Total input : W

MUCFH-A18WV - MUCFH-A24WV - E1E1

OB337B--1.qxp 05.7.6 11:00 AM Page 10

Questo manuale è adatto per i seguenti modelli

Indice

Altri manuali Mitsubishi Electric Condizionatore d'aria

Mitsubishi Electric

Mitsubishi Electric Mr.SLIM PKA-M-KA Series Manuale utente

Mitsubishi Electric

Mitsubishi Electric MSZ-FT25VG-E1 Manuale utente

Mitsubishi Electric

Mitsubishi Electric MSZ-WG20VA-H1 Manuale di istruzioni

Mitsubishi Electric

Mitsubishi Electric MSZ-GE60VA Manuale

Mitsubishi Electric

Mitsubishi Electric MU-GD08NDMU-C1 Manuale utente

Mitsubishi Electric

Mitsubishi Electric SUZ-KA25VAH.TH Guida del prodotto

Mitsubishi Electric

Mitsubishi Electric Mr.Slim PUZ-A NHA Manuale utente

Mitsubishi Electric

Mitsubishi Electric MXZ-2HA50VF Manuale utente

Mitsubishi Electric

Mitsubishi Electric MSZ-HR60VF Manuale utente

Mitsubishi Electric

Mitsubishi Electric MSZ-EF18VGW Manuale utente

Mitsubishi Electric

Mitsubishi Electric Mr.Slim MFZ-KA09NA Manuale utente

Mitsubishi Electric

Mitsubishi Electric MXZ-4E83VA Manuale utente

Mitsubishi Electric

Mitsubishi Electric PEFY-P25VMA-E Manuale operativo

Mitsubishi Electric

Mitsubishi Electric MUZ-GE25VA-a1 Manuale utente

Mitsubishi Electric

Mitsubishi Electric Mr. Slim PEAD-M35JA Manuale utente

Mitsubishi Electric

Mitsubishi Electric MSZ-FH09NA Manuale utente

Mitsubishi Electric

Mitsubishi Electric Mr.Slim MFZ-KA09NA Manuale utente

Mitsubishi Electric

Mitsubishi Electric MU-A08VD-P1 Manuale utente

Mitsubishi Electric

Mitsubishi Electric PAA-A18 AA1 Manuale utente

Mitsubishi Electric

Mitsubishi Electric CMB-P-NU-J1 Manuale utente

Mitsubishi Electric

Mitsubishi Electric PUHZ-P200YKA2 Manuale utente

Mitsubishi Electric

Mitsubishi Electric PUH-P10MYA Manuale utente

Mitsubishi Electric

Mitsubishi Electric Mr.SLIM PKA-M-LA(L)2 Series Manuale utente

Mitsubishi Electric

Mitsubishi Electric PUMY-P112VKM1 Manuale utente

Manuali Condizionatore d'aria popolari di altre marche

Spheros

Spheros CC 355 Manuale utente

Bosch

Bosch Climate 5000 SCI 24 CAS/ OU- OUE Manuale utente

Panasonic

Panasonic CS-E12HKEW Manuale utente

nedis

nedis ACMB1WT7 Manuale utente

Samsung

Samsung AR KV Series Guida

Daikin

Daikin FCFV50A Manuale utente

Fujitsu

Fujitsu Inverter ASBA30JFC Manuale utente

Toshiba

Toshiba RAS-M10SMUV-E Manuale utente

Daikin

Daikin FXLQ20MAVE Manuale utente

Hitachi

Hitachi RAS-E24CAK Manuale utente

CIAT

CIAT Magister 2 Series Guida

Bestron

Bestron AAC6000 Manuale utente

Hisense

Hisense 7K Manuale tecnico

Frigidaire

Frigidaire FFRE0533S1E0 Manuale utente

Samsung

Samsung AS09HM3N Manuale utente

Frigidaire

Frigidaire CRA073PU11 Manuale del proprietario

Soleus Air

Soleus Air GB-PAC-08E4 Manuale utente

McQuay

McQuay MCK020A Manuale utente