Mitsubishi Electric SUZ-KA71VA4 Service Manual

Browse online or download Service Manual for Split-system air conditioners Mitsubishi Electric SUZ-KA71VA4. Mitsubishi Electric SUZ-KA71VA4 Service manual User Manual

  • Download
  • Add to my manuals
  • Print
  • Page
    / 46
  • Table of contents
  • TROUBLESHOOTING
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 0
TECHNICAL & SERVICE MANUAL
No.OCH545
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
Outdoor unit
[Model Name]
[Service Ref.]
SUZ-KA25VA4 SUZ-KA25VA4.TH
SUZ-KA35VA4 SUZ-KA35VA4.TH
SUZ-KA50VA4 SUZ-KA50VA4.TH
SUZ-KA60VA4 SUZ-KA60VA4.TH
SUZ-KA71VA4 SUZ-KA71VA4.TH
CONTENTS
1.
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
Note:
This service manual
describes technical data of
the outdoor units.
HFC
utilized
R410A
SUZ-KA25VA4.TH
SUZ-KA35VA4.TH
August 2013
PARTS CATALOG (OCB545)
Page view 0
1 2 3 4 5 6 ... 45 46

Summary of Contents

Page 1 - August 2013

TECHNICAL & SERVICE MANUALNo.OCH545SPLIT-TYPE, HEAT PUMP AIR CONDITIONERSR410AOutdoor unit[Model Name] [Service Ref.]SUZ-KA25VA4 SUZ-KA25VA4.THSU

Page 2 - INDOOR UNIT SERVICE MANUAL

10NOISE CRITERIA CURVES5OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BARCOOLINGFUNCTIONSPL(dB(A))LINEHighMed.FAN SPEEDHEATING47489080706050403

Page 3 - TECHNICAL CHANGES

116OUTLINES AND DIMENSIONS1069800302.5500 Bolt pitch for installation15022.3Handle550280164.599.5170.523Service panelService port285344.544400Air inAi

Page 4

12417.54042Drain hole17550033050Air inAir out2-Oval holes 10 2184010981880452Service panel99.5164.51953544Liquid refrigerantpipe jointRefrigerant pi

Page 5 - 2. Refrigerant piping

13137WIRING DIAGRAMSUZ-KA25VA4.THSUZ-KA35VA4.THOCH545

Page 6 - 6. Pumping Down

14SUZ-KA50VA4.THOCH545

Page 7 - PARTS NAMES AND FUNCTIONS

15SUZ-KA60VA4.THSUZ-KA71VA4.THOCH545

Page 8 - SPECIFICATION

16REFRIGERANT SYSTEM DIAGRAM8Unit: mmSUZ-KA25VA4.THUnit: mmSUZ-KA35VA4.THFlared connectionDefrostthermistorRT61DischargetemperaturethermistorRT62Flare

Page 9 - SUZ-KA50VA4.TH SUZ-KA60VA4.TH

1717Unit: mmSUZ-KA50VA4.THOutdoorheatexchangerFlared connectionDefrostthermistorRT61DischargetemperaturethermistorRT62Flared connectionStop valveStop

Page 10 - NOISE CRITERIA CURVES

18ADDITIONAL REFRIGERANT CHARGE (R410A: g)SUZ-KA25VA4.TH SUZ-KA35VA4.TH SUZ-KA50VA4.THSUZ-KA60VA4.TH SUZ-KA71VA4.THMAX. REFRIGERANT PIP

Page 11 - OUTLINES AND DIMENSIONS

1919ACTUATOR CONTROL9SUZ-KA25VA4.TH SUZ-KA35VA4.TH SUZ-KA50VA4.TH SUZ-KA60VA4.TH SUZ-KA71VA4.TH9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR9-2. R

Page 12 - REQUIRED SPACE

21COMBINATION OF INDOOR AND OUTDOOR UNITSHeat pump typeOutdoor unitSUZ- SLZ-KA25VAL2.THSLZ-KA35VALR3.THSLZ-KA50VALR3.THSLZ-KA25VAQ2.THSLZ-KA35VAQR2.TH

Page 13 - WIRING DIAGRAM

20SUZ-KA25VA4.TH SUZ-KA35VA4.TH SUZ-KA50VA4.TH SUZ-KA60VA4.TH SUZ-KA71VA4.THCHANGE IN DEFROST SETTINGChanging defrost finish temperature<JS> To

Page 14 - SUZ-KA50VA4.TH

2121SUZ-KA25VA4.TH SUZ-KA35VA4.TH SUZ-KA50VA4.TH SUZ-KA60VA4.TH SUZ-KA71VA4.TH temperature thermistor, outdoor heat exchanger temperature No.

Page 15 - SUZ-KA71VA4.TH

22F1 F2 F3 F4unem ecivreSrosruC:unem niaMTest runInput maintenance info.Function settingCheckSelf checkkcehc fleS:tceleSRef. addresssserddAkcehc fleSR

Page 16 - REFRIGERANT SYSTEM DIAGRAM

23If operations cannot be completed with the remote controller, diagnose the remote controller with this function.F1 F2 F3 F4unem ecivreSrosruC:unem n

Page 17 - Unit: mm

24When a problem occurs to the air conditioner, the indoor and outdoor units will stop,and the problem is shown in the remote controller display.[CHE

Page 18 - MAX. HEIGHT DIFFERENCE

25Transmission data from remote controllerTransmission data on transmission pathWhen the number of data errors is "02":Press the ON/OFF butt

Page 19 - ACTUATOR CONTROL

26• "CHECK" lights, and refrigerant address "00" flashes.• Check that the remote controller's display has stopped before cont

Page 20 - SERVICE FUNCTIONS

27[Output pattern A] Errors detected by indoor unit[Output pattern B]E91. If the beeper does not sound again after the initial 2 beeps to confirm the

Page 21 - (KA25/35/50)

2811-4. TROUBLE CRITERION OF MAIN PARTS Parts nameFigureCheck method and criterionOutdoor fan motor R.V. coil (21S4) Expansion valve coil(LEV)Measure

Page 22 - F1 F2 F3 F4

29 A How to check inverter/compressorAre the voltages balanced?Disconnect the connector between the compressor and the intelligent power module (KA25

Page 23

32TECHNICAL CHANGESRefrigerantoilRefrigerantNew refrigerantR410AHFC-32: HFC-125 (50%:50%)Pseudo-azeotropic refrigerantNot includedA1/A172.6-51.41.5576

Page 24 - (Alternating Display)

30 D Check of compressor winding Disconnect the connector between the compressor and intelligent power module, and measure the resistance between the

Page 25

31 G Check of R.V. coilFirst of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-4.In case CN721(KA25/35/50)/C

Page 26 - TEST RUN

32 I Check of LEV Turn on power supply to the outdoor unit after checking LEV coil is fi xed to the LEV body securely.YesDisconnect the connector CN7

Page 27 - Beep Beep

33 Electromagnetic noise enters into TV sets or radiosYesIs the unit earthed?NoEarth the unit.YesIs the distance between the antennas and the indo

Page 28

3411-6. TEST POINT DIAGRAM AND VOLTAGE11-6-1. Inverter P.C. boardSUZ-KA25VA4.TH SUZ-KA35VA4.TH SUZ-KA50VA4.TH-20 -10 0 10 20 30 400102030405060708090

Page 29 - 11-5. TROUBLESHOOTING FLOW

3511-6-2. Inverter P.C. boardSUZ-KA60VA4.TH SUZ-KA71VA4.TH-20 -10 0 10 20 30 400102030405060708090100Temperature( )Defrost thermistor(RT61)Ambient t

Page 30

3612DISASSEMBLY INSTRUCTIONS(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the lo

Page 31 - H Check of outdoor fan motor

3737OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to procedure 1.)(2) Disco

Page 32 - I Check of LEV

38OPERATING PROCEDUREPHOTOS5. Removing outdoor fan motor(1) Remove the cabinet and panels. (Refer to procedure 1.)(2) Disconnect the following connect

Page 33

39SUZ-KA50VA4.THNOTE: Turn OFF power supply before disassembly.OPERATING PROCEDUREPHOTOS1. Removing the cabinet(1) Remove the screws of the service pa

Page 34

4R410A tools Can R22 tools be used?Gas leak detectorR410A has high pressures beyond the measurement range of existing gauges. Port diameters have been

Page 35 - SUZ-KA60VA4.TH SUZ-KA71VA4.TH

40OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to procedure 1.)(2) Disconn

Page 36 - DISASSEMBLY INSTRUCTIONS

41OPERATING PROCEDURE PHOTOS4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera-ture thermistor and a

Page 37 - OPERATING PROCEDURE

42NOTE: Turn OFF power supply before disassembling.OPERATING PROCEDUREPHOTOS1. Removing the cabinet(1) Remove the screws of the service panel.(2) Remo

Page 38

43OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to procedure 1.)(2) Disconn

Page 39

44OPERATING PROCEDURE PHOTOS4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera-ture thermistor and a

Page 40

45OCH545

Page 41 - OPERATING PROCEDURE PHOTOS

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN Copyright 2013 MITSUBISHI ELECTRIC CORPORATIONDistributed in Aug. 2013

Page 42

5Electronic scale for refrigerant chargingOutdoor unitRefrigerant gas cylinderoperating valveRefrigerant gas cylinderfor R410A with siphonRefrigerant

Page 43

66. Pumping DownWhen relocating or disposing of the air conditioner, pump down the system by following the procedure below so that no refrigerant is r

Page 44

773PARTS NAMES AND FUNCTIONSSUZ-KA25VA4.TH SUZ-KA35VA4.THSUZ-KA50VA4.THSUZ-KA60VA4.THSUZ-KA71VA4.THAir outletDrain outletPipingDrain hoseAir inlet(b

Page 45

8SPECIFICATION4NOTE: Test conditions are based on ISO 5151 Cooling : Indoor D.B. 27°C W.B. 19°C Outdoor D.B. 35°C Heating : Indoor D.B. 20°C

Page 46

99SUZ-KA25VA4.TH SUZ-KA35VA4.THSUZ-KA50VA4.TH SUZ-KA60VA4.THSUZ-KA71VA4.THSpecifications and rating conditions of main electric partsModelItemSUZ-KA25

Comments to this Manuals

No comments