Mitsubishi Electric Mr.Slim SUZ-KA25VA3 User manual

TECHNICAL & SERVICE MANUAL

No.OCH530

REVISED EDITION-A

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

R410A

Outdoor unit

[Model Name]

[Service Ref.]

SUZ-KA25VA3 SUZ-KA25VA3.TH

SUZ-KA35VA3 SUZ-KA35VA3.TH

SUZ-KA50VA3 SUZ-KA50VA3.TH

SUZ-KA60VA3 SUZ-KA60VA3.TH

SUZ-KA71VA3 SUZ-KA71VA3.TH

CONTENTS

COMBINATION OF INDOOR AND OUTDOOR UNITS

..... 2

2. TECHNICAL CHANGES ................................... 3

3. PARTS NAMES AND FUNCTIONS .................. 7

4. SPECIFICATION................................................ 8

5. NOISE CRITERIA CURVES ............................ 10

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

7. WIRING DIAGRAM.......................................... 13

8. REFRIGERANT SYSTEM DIAGRAM ............. 16

9. ACTUATOR CONTROL................................... 19

10. SERVICE FUNCTIONS.................................... 20

11. TROUBLESHOOTING ..................................... 20

12. DISASSEMBLY INSTRUCTIONS.................... 36

Indication of

model name

HFC

utilized

R410A

SUZ-KA25VA3.TH

SUZ-KA35VA3.TH

September 2013

PARTS CATALOG (OCB530)

Note:



















1COMBINATION OF INDOOR AND OUTDOOR UNITS

Heat pump type

Outdoor unit

SUZ-

SLZ-KA25VA(L).TH

SLZ-KA35VA(L).TH

SLZ-KA50VA(L).TH

SLZ-KA25VAL2.TH

SLZ-KA35VALR3.TH

SLZ-KA50VALR3.TH

SLZ-KA25VAQ2.TH

SLZ-KA35VAQR2.TH

SLZ-KA50VAQR2.TH

SEZ-KD25VA(L)R2.TH

SEZ-KD35VA(L)R2.TH

SEZ-KD50VA(L)R2.TH

SEZ-KD60VA(L)R2.TH

SEZ-KD71VA(L)R2.TH

SEZ-KD25VAQR2.TH

SEZ-KD35VAQR2.TH

SEZ-KD50VAQR2.TH

SEZ-KD60VAQR2.TH

SEZ-KD71VAQR2.TH

—

OC320

OCH493

Indoor unit

Service

Manual No.

Service Ref.

Heat pump without electric heater

KA25VA3.TH

KA60VA3.TH KA71VA3.THKA50VA3.TH

HWE0711

BWE102050

BWE102040

HWE1008

KA35VA3.TH



INDOOR UNIT SERVICE MANUAL

OCH530



2TECHNICAL CHANGES

Refrigerant

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

None

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

None

Refrigerant

Composition (Ratio)

Refrigerant handling

Chlorine

Safety group (ASHRAE)

Molecular weight

Boiling point (°C)

Steam pressure [25°C](Mpa)

Saturated steam density [25°C](Kg/*)

Combustibility

ODP *1

GWP *2

Refrigerant charge method

Additional charge on leakage

Kind

Color

Smell

*1: Ozone Depletion Potential : based on CFC-11

*2: Global Warming Potential : based on CO2

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

 

 

-



-











NOTE 

1 (MPa [Gauge]) =10.2 (kgf/cm2[Gauge])

New Specification Current Specification

The incompatible refrigerant 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

refrigerant oil of the upper layer to flow back to the

compressor.

Since refrigerant and refrigerant oil are compatible with

each other, refrigerant oil backs to the compressor through

the lower position oil back hole.

Compressor

Suction muffler

Oil back hole

Refrigerant oil

Refrigerant

Compressor

Suction muffler

Oil back hole

Refrigerant oil /Refrigerant

Compressor

OCH530



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 R410A with 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

 

 

 

-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



1 (MPa [Gauge]) =10.2 (kgf/cm2[Gauge])

OCH530



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)

R410A

Pipe diameter (mm)

6.35

9.52

12.7

15.88

Dimension of flare nut (mm)

R22







 

 

3. Refrigerant oil

 

4. Air purge









5. Additional charge

 







2. Refrigerant piping



 

Wall thicknessOutside diameter

Pipe mm mm

For liquid

For gas

6.35

9.52

12.7

15.88

0.8

1.0

Heat resisting foam plastic

Specific gravity 0.045

Thickness 8 mm

Insulation material

OCH530



6. Pumping Down





1 

2 

3 

4 

5 

  



 

 

6 

 

 

Note:





7 

.Warning: When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.

 

the pressure in the refrigeration cycle could become extremely high if air is drawn in, causing the pipes to burst,

personal injury, etc.

OCH530



3PARTS NAMES AND FUNCTIONS

SUZ-KA25VA3.TH

SUZ-KA35VA3.TH

SUZ-KA50VA3.TH

SUZ-KA60VA3.TH

SUZ-KA71VA3.TH

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

Model SUZ-KA·VA3.TH

 

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

OCH530



SPECIFICATION



   

   

  

    

 

 



SUZ-KA25VA3.TH SUZ-KA35VA3.TH SUZ-KA50VA3.TH SUZ-KA60VA3.TH SUZ-KA71VA3.TH

 



Model    

     





 A    

     



(Model)

L    



Model   





 A    

     

 mm  

      













   

    

     



    

     

     

 



   

    











   

   

    



   

   

    

 



      

OCH530

SUZ-KA25VA3.TH SUZ-KA35VA3.TH

SUZ-KA50VA3.TH SUZ-KA60VA3.TH

SUZ-KA71VA3.TH

Specifications and rating conditions of main electric parts

Model

Item

SUZ-KA25VA3.TH SUZKA35VA3.TH SUZ-KA50VA3.TH SUZ-KA60VA3.TH SUZ-KA71VA3.TH





 — — + — —

 + + + — —

 — — —  

     — —



    — —

 — — —  



   — —

    — —





(IPM) — — — 

     





 — — —  

    — —



coil (LEV) 

     — —

(L) — — —  



  

  — — —  

    — —



    — —

 

 — — —  

 — — —  

  

OCH530



NOISE CRITERIA CURVES

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

COOLING

FUNCTION SPL(dB(A)) LINE

High

Med.

FAN SPEED

HEATING

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

SUZ-KA25VA3.TH

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

COOLING

FUNCTION SPL(dB(A)) LINE

FAN SPEED

HEATING

High

Med.

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

SUZ-KA35VA3.TH

COOLING

FUNCTION SPL(dB(A)) LINE

High

FAN SPEED

HEATING

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

SUZ-KA50VA3.TH

Test conditions

Cooling: Dry-bulb temperature 35°C

Heating: Dry-bulb temperature 7°C

Wet-bulb temperature 6°C

OUTDOOR UNIT

MICROPHONE

1 m

SUZ-KA60VA3.TH SUZ-KA71VA3.TH

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR

COOLING

FUNCTION SPL(dB(A)) LINE

High

FAN SPEED

HEATING

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

OCH530

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