Mitsubishi MXZ-32SV-E1, MXZ-32SV-E2 Service Manual

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Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

Inverter-controlled multi system Models

Revision B:

● “Check of HPS” and PARTS LIST have been corrected.

Please void OB254 REVISED EDITION-A.

No. OB254

REVISED EDITION-B

MXZ-32SV MXZ-32SV -

Model indication

CONTENTS

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

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

3. INDOOR/OUTDOOR CORRESPONDENCE TABLE ···························3

4. INDOOR UNITS COMBINATION ·······················4

5. SPECIFICATION·················································8

6. NOISE CRITERIA CURVES······························ 9

7. OUTLINES AND DIMENSIONS······················ 10

8. WIRING DIAGRAM···········································11

9. REFRIGERANT SYSTEM DIAGRAM··············12

10. PERFORMANCE CURVES······························13

11. MICROPROCESSOR CONTROL·····················19

12. TROUBLESHOOTING ······································25

13. DISASSEMBLY INSTRUCTIONS·····················37

14. PARTS LIST······················································40

15. OPTIONAL PARTS ···········································43

This manual describes technical data of outdoor unit. For indoor unit, refer to the service manuals No. OB229, OB227, OB252, OB212, OB239 and OC165.

Page 2

Revision A:

• MXZ-32SV - has been added.

Revision B:

• “Check of HPS” and PARTS LIST have been corrected.

MXZ-32RV - ➔ MXZ-32SV -

1. The combination pattern of the indoor unit has been increased.

2. Crankcase heater has been disused.

3. Refrigerant circuit has been changed.

• Disuse of 2-way valve.

• Disuse of capillary tube

• Disuse of low pressure switch.

• Disuse of suction pipe temperature thermistor.

MXZ-32SV - ➔ MXZ-32SV -

1. Combinations of the connectable indoor units have been increased.

2. Noise filter P.C. board has been changed to improve the capacity for protecting the inverter-controlled circuit when the voltage higher than the rated one is aupplied with the inverter-controlled circuit.

3. Noise filter P.C. board for “E1” and “E2” are not interchangeable.

4. Service parts have been changed as follows according to above change;

•The value of R(resistor)has been changed. 10Ω ➔ 20Ω

•TB6(terminal block) has been removed.

TECHNICAL CHANGES

E1E1

[3 o [2 o 500.

E2E1

PART NAMES AND FUNCTIONS

OUTDOOR UNIT

MXZ-32SVMXZ-32SV-

E1 E2

Air outlet

Air inlet

Model indication

(back and side)

Page 3

❈There is no combination other than this table.

MXZ-32SV- E1 , MXZ-32SV- E2

OUTDOOR UNIT

Combination of the connectable indoor units

07+07 07+09 07+12 07+18 09+09 09+12 09+18 12+12 12+18

18+18 07+07+07 07+07+09 07+07+12 07+07+18 07+09+09 07+09+12 07+09+18 07+12+12 07+12+18 07+18+18 09+09+09 09+09+12 09+09+18 09+12+12 09+12+18 09+18+18 12+12+12 12+12+18

07+07+07+07 07+07+07+09 07+07+07+12 07+07+07+18 07+07+09+09 07+07+09+12 07+07+09+18 07+07+12+12 07+07+12+18 07+09+09+09 07+09+09+12 07+09+09+18 07+09+12+12 09+09+09+09 09+09+09+12 09+09+09+18 09+09+12+12

NOTE: SLH-1AR is equivalent to class 09 (9000BTU).

INDOOR / OUTDOOR CORRESPONDENCE TABLE

MCFH-13NV, SEH-1.6AR, SLH-1.6AR is equivalent to class 12 (12000BTU). MCFH-18NV, SEH-2AR,SLH-2AR is equivalent to class 18 (18000BTU).

Page 4

07+07

07+09

07+12

07+18

09+09

09+12

09+18

12+12

12+18

18+18

07+07+07

07+07+09

07+07+12

07+07+18

07+09+09

07+09+12

07+09+18

07+12+12

07+12+18

07+18+18

3.47

4.17

6.67

10.65

7.13

7.50

10.56

14.31

8.80

12.64

17.31

18.33

10.19

11.25

13.80

12.96

13.80

3.79

4.55

7.27

11.62

7.78

8.18

11.52

15.61

9.60

13.79

18.89

20.00

11.11

12.27

15.05

14.14

15.05

2.2

(0.9-2.7)

2.8

(0.9-3.2)

4.0

(0.9-4.5)

5.0

(0.9-5.4)

4.4

(1.8-5.4)

5.0

(1.8-5.8)

6.2

(1.8-6.6)

7.2

(1.8-7.7)

5.6

(1.8-6.2)

6.8

(1.8-7.3)

7.8

(1.8-8.5)

8.0

(1.8-8.8)

8.0

(1.8-8.8)

8.0

(1.8-8.8)

6.6

(2.4-8.1)

7.2

(2.4-8.6)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

7.8

(2.4-8.9)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

0.75

(0.26-0.93)

0.90

(0.26-1.04)

1.44

(0.26-1.70)

2.30

(0.26-2.98)

1.54

(0.58-1.96)

1.62

(0.58-2.05)

2.28

(0.58-2.51)

3.09

(0.58-3.65)

1.90

(0.58-2.18)

2.73

(0.58-3.22)

3.74

(0.58-4.56)

3.96

(0.58-4.90)

3.96

(0.58-4.90)

3.96

(0.58-4.90)

2.20

(0.70-3.65)

2.43

(0.70-4.11)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.80

(0.70-4.23)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.2

2.8

3.8

4.2

2.8

3.6

4.0

3.1

3.6

3.25

2.2

2.8

4.0

5.0

2.8

4.0

5.0

4.0

4.5

4.0

2.2

2.1

1.9

2.8

2.5

2.3

3.1

2.8

3.25

2.2

2.8

4.0

5.0

2.2

2.8

4.0

3.5

4.0

2.2

2.1

1.9

2.2

1.9

1.7

1.8

1.6

1.5

Indoor units combination

Unit A Unit B Unit C Unit D

Cooling capacity (kW)

Total

Outdoor unit

power consumption

(kW)

Current

(A)

Power

factor

(%)

220V 240V

NOTE: Electrical data is for outdoor unit only.

MXZ-32SV -

E1 ,

MXZ-32SV -

INDOOR UNITS COMBINATION

NOTE: SLH-1AR is equivalent to class 09 (9000BTU).

MCFH-13NV, SEH-1.6AR, SLH-1.6AR is equivalent to class 12 (12000BTU). MCFH-18NV, SEH-2AR,SLH-2AR is equivalent to class 18 (18000BTU).

Page 5

Indoor units combination

09+09+09

09+09+12

09+09+18

09+12+12

09+12+18

09+18+18

12+12+12

12+12+18

07+07+07+07

07+07+07+09

07+07+07+12

07+07+07+18

07+07+09+09

07+07+09+12

07+07+09+18

07+07+12+12

07+07+12+18

07+09+09+09

07+09+09+12

07+09+09+18

07+09+12+12

09+09+09+09

09+09+09+12

09+09+09+18

09+09+12+12

NOTE: SLH-1AR is equivalent to class 09 (9000BTU).

MCFH-13NV, SEH-1.6AR, SLH-1.6AR is equivalent to class 12 (12000BTU). MCFH-18NV, SEH-2AR,SLH-2AR is equivalent to class 18 (18000BTU).

Unit A Unit B Unit C Unit D

2.67

2.3

2.1

2.0

1.9

1.8

2.67

2.45

2.0

1.87

1.7

1.5

1.8

1.6

1.5

1.4

1.3

1.7

1.5

1.4

1.35

2.0

1.8

1.67

1.65

2.67

2.45

1.87

1.75

1.67

1.65

Cooling capacity (kW)

2.67

2.3

2.1

3.0

2.7

3.1

2.0

1.7

1.5

1.8

1.6

1.5

1.4

1.3

2.1

1.9

2.0

1.8

3.4

3.8

3.0

3.4

3.1

2.67

3.1

2.0

1.87

1.7

1.5

2.2

2.0

1.8

2.6

2.4

2.1

1.9

1.75

2.45

2.0

1.8

1.67

2.35

2.0

2.4

2.9

3.5

2.2

2.8

3.2

2.6

3.0

2.1

2.7

3.1

2.45

2.0

2.6

3.0

2.35

Total

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.4-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

8.0

(2.8-9.0)

NOTE: Electrical data is for outdoor unit only.

Outdoor unit

power consumption

(kW)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.70-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

2.98

(0.80-4.27)

Current

(A)

220V 240V

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.80

15.05

13.08

15.05

13.08

15.05

13.08

15.05

Power

factor

(%)

Page 6

NOTE: Electrical data is for outdoor unit only.

07+07

07+09

07+12

07+18

09+09

09+12

09+18

12+12

12+18

18+18

07+07+07

07+07+09

07+07+12

07+07+18

07+09+09

07+09+12

07+09+18

07+12+12

07+12+18

07+18+18

5.23

6.11

8.84

10.65

8.94

9.49

11.81

12.41

10.88

12.13

12.87

11.20

11.57

12.87

5.71

6.67

9.65

11.62

9.75

10.35

12.88

13.54

11.87

13.23

14.04

12.22

12.63

14.04

3.2

(0.9-4.1)

4.0

(0.9-4.8)

6.0

(0.9-7.2)

7.1

(0.9-7.8)

6.4

(1.8-7.2)

7.2

(1.8-8.7)

8.6

(1.8-10.6)

9.0

(1.8-10.9)

8.0

(1.8-10.1)

8.8

(1.8-10.8)

9.3

(1.8-11.2)

9.3

(1.8-11.2)

9.3

(1.8-11.2)

9.3

(1.8-11.2)

8.6

(2.1-10.6)

9.0

(2.1-11.1)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

1.13

(0.27-1.60)

1.32

(0.27-1.70)

1.91

(0.27-2.57)

2.30

(0.27-2.83)

1.93

(0.48-2.30)

2.05

(0.48-2.68)

2.55

(0.48-3.80)

2.68

(0.48-3.89)

2.35

(0.48-3.56)

2.62

(0.48-3.86)

2.78

(0.48-3.98)

2.78

(0.48-3.98)

2.78

(0.48-3.98)

2.78

(0.48-3.98)

2.42

(0.52-3.00)

2.50

(0.52-3.30)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.87

3.5

4.5

4.9

3.3

4.25

4.6

3.65

4.05

3.8

3.2

4.0

5.4

6.2

4.0

5.3

5.95

4.65

5.0

4.65

2.87

2.75

2.4

2.2

3.3

2.8

2.6

3.65

3.4

3.8

3.2

4.0

6.0

7.1

3.2

2.8

4.0

3.5

3.35

4.65

4.3

4.65

2.87

2.75

2.4

2.2

2.7

2.25

2.1

2.0

1.85

1.7

Indoor units combination

Unit A Unit B Unit C Unit D

Heating capacity (kW)

Total

Outdoor unit

power consumption

(kW)

Current

(A)

Power

factor

(%)

220V 240V

NOTE: SLH-1AR is equivalent to class 09 (9000BTU).

MCFH-13NV, SEH-1.6AR, SLH-1.6AR is equivalent to class 12 (12000BTU). MCFH-18NV, SEH-2AR,SLH-2AR is equivalent to class 18 (18000BTU).

Page 7

Indoor units combination

09+09+09

09+09+12

09+09+18

09+12+12

09+12+18

09+18+18

12+12+12

12+12+18

07+07+07+07

07+07+07+09

07+07+07+12

07+07+07+18

07+07+09+09

07+07+09+12

07+07+09+18

07+07+12+12

07+07+12+18

07+09+09+09

07+09+09+12

07+09+09+18

07+09+12+12

09+09+09+09

09+09+09+12

09+09+09+18

09+09+12+12

Heating capacity (kW)

Unit A Unit B Unit C Unit D

3.1

2.65

2.45

2.3

2.2

2.0

3.1

2.9

2.32

2.2

1.9

1.8

2.1

1.8

1.7

1.6

1.95

1.75

1.65

1.55

2.32

2.05

1.95

1.85

3.1

2.65

2.45

3.5

3.3

3.65

3.1

2.9

2.32

2.2

1.9

1.8

2.1

1.8

1.7

1.6

2.45

2.15

2.0

1.95

2.32

2.05

1.95

1.85

3.1

4.0

4.4

3.5

3.8

3.65

3.1

3.5

2.32

2.2

1.9

1.8

2.55

2.3

2.15

3.05

2.8

2.45

2.15

2.0

2.9

2.32

2.05

1.95

2.8

2.32

2.7

3.6

3.9

2.55

3.4

3.75

3.05

3.3

2.45

3.25

3.65

2.9

2.32

3.15

3.45

2.8

Total

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.1-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

9.3

(2.8-11.6)

NOTE: Electrical data is for outdoor unit only.

Outdoor unit

power consumption

(kW)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.52-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

2.78

(0.60-3.50)

Current

(A)

220V 240V

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

12.87

14.04

Power

factor

(%)

NOTE: SLH-1AR is equivalent to class 09 (9000BTU).

MCFH-13NV, SEH-1.6AR, SLH-1.6AR is equivalent to class 12 (12000BTU). MCFH-18NV, SEH-2AR,SLH-2AR is equivalent to class 18 (18000BTU).

Page 8

Outdoor model

Indoor units number Indoor units total capacity (Connectable) indoor units total capacity (Simultaneous operation) Piping total length Connecting pipe length Height difference (Indoor ~ Outdoor) Height difference (Indoor ~ Indoor) Function Capacity Dehumidification Outdoor air flow Power outlet Running current Power input Auxiliary heater Crankcase heater Power factor Starting current Compressor motor current Fan motor current

Model Output Winding resistance(at20:) Model Winding resistance(at20:) Dimensions WOHOD Weight Sound level (Hi) Fan speed (Hi) Fan speed regulator Refrigerant filling capacity(R-22) Refrigerating oil (Model) Thermistor RT61 Thermistor RT62 Thermistor RT63 Thermistor RT65 Thermistor RT66,67 Thermistor RT68,69

R/h

K /h

A A

A(kW)

W %

A A A

  



rpm

cc k" k" k" k" k" k"



Compressor

Electrical

data

Fan

motor

Special

remarks

Capacity System

Coefficient of performance(C.O.P)

Outdoor unit power supply

MXZ-32SV -

MXZ-32SV - E2

Single phase

220-240V,50Hz

2 to 4 Total model name 42 Total model name 42

Max. 60 Max. 25

10 10

2400-2640

— —

90.0

15.05-13.80

0.6

THV-247FBA (ROTARY)

2100

U-V 0.61

V-W 0.61 W-U 0.61

RA6V60-BA WHT-BLK 78.7 BLK-YLW 26.9 YLW-BLU 11.7 BLU-RED 83.6

900o900o320 (+35)

630-675

3.9

870 (MS-56)

13.4 (at 100:)

10.0 (at 25:)

17.0 (at 50:)

10.0 (at 25:)

Cooling

8.0 (0.9~9.0) —

15.05-13.80

2980(260~4270)

15.71-14.35

2.68

45-47

Heating

9.3 (0.9~11.6) —

14.04-12.87

2780(270~3500)

13.44-12.27

3.35

46-48

✽1 Electrical data is for only outdoor unit.

TEST CONDITIONS COOLING INDOOR DB27.0°C WB19.0°C

SPECIFICATION

HEATING INDOOR DB20.0°C

OUTDOOR DB35.0°C WB24.0°C OUTDOOR DB 7.0°C WB 6.0°C

Page 9

NOISE CRITERIA CURVES6

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

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

BAND CENTER FREQUENCIES, Hz

Test conditions.

Cooling :DB35: WB24: Heating :DB 7: WB 6:

COOL(220V)

NOTCH

COOL(240V)

HEAT(220V) HEAT(240V)

SPL(dB(A))

47 46

LINE

MXZ-32SV -

MXZ-32SV - E2

Page 10

OUTLINES AND DIMENSIONS

OUTDOOR UNIT

MXZ-32SV MXZ-32SV -

Handle for moving

E1 E2

Less than

Veranda

Base bolt length

Base

Rubber cushion

Air in

10 35320

Unit: mm

200 200

Air in

460

317

500 Air in

Air out

2-12 ✕ 36 Oval hole

(Base bolt M10)

900

2-U-shape notched holes

(Base bolt M10)

(16) (16)

27 40

387

355

[

9.52 (flared) 3/8 (C , D unit)

12.7 (flared) 1/2 (A , B unit)

[

Indoor and outdoor connect wiring 23✕45 hole

350.0

480.8

900

531.3

Liquid pipe

[

6.35 (flared) 1/4

D unit connection C unit connection

B unit connection A unit connection

1.Installation space

Note : Leave front and both sides clearance fully.

Note : Leave front and overhead clearance fully.

Note : Leave front, overhead and both clearance fully.

More than

100

More than

500

More than 100

More than

200

More than 350

More than

500

Note : Obstacles on front and rear side only

The unit can be used by attaching an optional outdoor outlet guide (MAC-855SG) (but both sides and the top are open).

2.Service space

More than

100

More than

350

More than 350

More than

100

Service space

More than

500

Page 11

POWER SUPPLY ~/N 220-240V 50Hz

INDOOR UNIT (A)

CIRCUIT BREAKER

TB2

TB3

BLU RED

TB4

X64

GRN/YLW

GRN

CN720

CN601

X64

LD62

CN913

CN791

CN901

6 4

CN902

CN851 CN852

MF61

21S4

1 2

2 1

1 2

3 4

1 2 3 4 5 6

1 2 3 4 5 6 7

1 2 3 4 5 6

C65

LD63

LD64

LDB

LD61

LDE

L61

F911

SSR61

X63

X62

X61

L N

INDOOR UNIT (B)

BLU ORN

CN602

1 2

INDOOR UNIT (C)

BLU YLW

CN603

1 2

INDOOR UNIT (D)

BLU BRN

CN604

1 2

BLK

BRN

GRY

BLK

WHT

YLW

RED

BRN

BLU

ORN

YLW

WHT

ORN

WHT

BLK

BLU

YLW

RED

ORN

RED

YLW

BLK

ORN ORN

BRN GRY

X65

X66

X67

63H2

CN552

CN553

BLK

RELAY

P.C. BOARD

WHT

RED

WHT

U W

WHT

NOISE FILTER P.C.BOARD

RED

DS61

DS62

C61

C63 C62

+-+

BLKREDR

BLU

LEV A

CN792

1 2 3 4 5 6

RED

BRN

BLU

ORN

YLW

WHT

LEV B

CN793

1 2 3 4 5 6

RED

BRN

BLU

ORN

YLW

WHT

LEV C

CN794 CN722 CN663

63H1 RT63

1 2 3 4 5 6

CN662

1 2 3 4 5 6 7 81 2 1 23 4

RED

BLK

RT66 RT68

RT67 RT69

GRY

CN661

CN705

7 6 5 4 3 2 1

CN515

1 2 3 4

4 3 2 1

CN801

CN501

TAB62

TAB63

T801

CT62

TAB66

TAB65

TAB64

I.P.M P.C. BOARD

F801

(1A)

CN704

CN514

CN554CN551

1 2 3 4 5 6 7 8

RT62

RT61

RT65

GRY

BLK

GRY

BRN

BLU

ORN

YLW

WHT

LEV D

ELECTRONIC CONTROL P.C. BOARD

(1A)

FROM INDOOR UNIT

CONNECTING 12V

SYMBOL

C61

C62,63

C65

CT61,62

DS61 DS62

F801 F911

L61

SYMBOL LEV A~D

MF61

R RT61 RT62 RT63 RT65

RT66,67 RT68,69

NAME POWER FACTOR CAPACITOR SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR CURRENT TRANSFORMER DIODE MODULE DIODE STACK FUSE (1A) FUSE (1A) REACTOR COMMON MODE CHOKE COIL

NAME EXPANSION VALVE COMPRESSOR OUTDOOR FAN MOTOR (INNER FUSE) RESISTOR DISCHARGE TEMPERATURE THERMISTOR DEFROST TEMPERATURE THERMISTOR EVAPORATION TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR GAS PIPE TEMPERATURE THERMISTOR GAS PIPE TEMPERATURE THERMISTOR

SYMBOL

SSR61

T801

TB2,3,4

X61,62,63

X64,65 X66,67

21S4 63H1 63H2

NAME SOLENOID COIL RELAY TRANSFORMER TERMINAL BLOCK FAN MOTOR RELAY RELAY RELAY R.V. COIL HIGH PRESSURE SWITCH HIGH PRESSURE SWITCH

NOTE: 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. : Terminal block : Connector

POWER SUPPLY ~/N 220-240V 50Hz

INDOOR UNIT (A)

CIRCUIT BREAKER

TB1

TB2

BLU RED

X64

GRN/YLW

GRN

CN720

CN601

X64

LD62

CN913

CN791

CN901

6 4

CN902

CN851 CN852

MF61

21S4

1 2

2 1

1 2

3 4

1 2 3 4 5 6

1 2 3 4 5 6 7

1 2 3 4 5 6

C65

LD63

LD64

LDB

LD61

LDE

L61

F911

SSR61

X63

X62

X61

L N

INDOOR UNIT (B)

BLU ORN

CN602

1 2

INDOOR UNIT (C)

BLU YLW

CN603

1 2

INDOOR UNIT (D)

BLU BRN

CN604

1 2

BLK

BRN

GRY

BLK

WHT

YLW

RED

BRN

BLU

ORN

YLW

WHT

ORN

WHT

BLK

BLU

YLW

RED

ORN

RED

YLW

BLK

ORN ORN

BRN GRY

X65

X66

X67

63H2

CN552

CN553

BLK

RELAY

P.C. BOARD

WHT

RED

WHT

U W

WHT

NOISE FILTER P.C.BOARD

RED

DS61

DS62

C61

C63 C62

+-+

BLK

RED

BLU

LEV A

CN792

1 2 3 4 5 6

RED

BRN

BLU

ORN

YLW

WHT

LEV B

CN793

1 2 3 4 5 6

RED

BRN

BLU

ORN

YLW

WHT

LEV C

CN794 CN722 CN663

63H1 RT63

1 2 3 4 5 6

CN662

1 2 3 4 5 6 7 81 2 1 23 4

RED

BLK

RT66 RT68

RT67 RT69

GRY

CN661

CN705

7 6 5 4 3 2 1

CN515

1 2 3 4

4 3 2 1

CN801

CN501

TAB62

TAB63

T801

CT62

TAB66

TAB65

TAB64

I.P.M P.C. BOARD

F801

(1A)

CN704

CN514

CN554CN551

1 2 3 4 5 6 7 8

RT62

RT61

RT65

GRY

BLK

GRY

BRN

BLU

ORN

YLW

WHT

LEV D

ELECTRONIC CONTROL P.C. BOARD

(1A)

FROM INDOOR UNIT

CONNECTING 12V

SYMBOL

C61

C62,63

C65

CT61,62

DS61 DS62 F801

F911

L61

LEV A~D

SYMBOL

MF61

R RT61 RT62 RT63 RT65

RT66,67 RT68,69

SSR61

T801

NAME POWER FACTOR CAPACITOR SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR CURRENT TRANSFORMER DIODE MODULE DIODE STACK FUSE (1A) FUSE (1A) REACTOR COMMON MODE CHOKE COIL EXPANSION VALVE

NAME COMPRESSOR OUTDOOR FAN MOTOR (INNER FUSE) RESISTOR DISCHARGE TEMPERATURE THERMISTOR DEFROST TEMPERATURE THERMISTOR EVAPORATION TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR GAS PIPE TEMPERATURE THERMISTOR GAS PIPE TEMPERATURE THERMISTOR SOLENOID COIL RELAY TRANSFORMER

SYMBOL

TB1,2,3,4,5

X61,62,63

X64,65 X66,67

21S4 63H1 63H2

F912

NR63

NAME TERMINAL BLOCK FAN MOTOR RELAY RELAY RELAY R.V. COIL HIGH PRESSURE SWITCH HIGH PRESSURE SWITCH FUSE(3.15A) VARISTOR

NOTE: 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. : Terminal block : Connector

TB3

TB4

TB5

(3.15A)

LD65

F912

NR63

SG79Y085H01

WIRING DIAGRAM

OUTDOOR UNIT

MODEL MXZ-32SV-

Page 12

Outdoor unit

Indoor units

Indoor unit

Ball valve with

service port

Ball valve with

service port

Distributor

Strainer

LEV

Oil

separator

Compressor

High pressure switch 1

Accumulator

Capillary tube

Reversing valve

Discharge temperature thermistor

Evaporation temperature thermistor (RT67)

Defrost thermistor

Strainer

Distributor

Outdoor heat exchanger

High pressure switch 2

Unit D gas pipe temperature thermistor

[9.52

Indoor unit

Unit C gas pipe temperature thermistor

[9.52

Indoor unit

Unit B gas pipe temperature thermistor

[12

Indoor unit

Strainer

LEV

Indoor unit

Strainer

LEV

Indoor unit

Strainer

LEV

Indoor unit

Unit A gas pipe temperature thermistor

[12

[16

[9.52

[16

Capillary tube

[2.0✕[0.6✕ 750

[2.5✕ [0.6✕1000

Capillary tube

[4.0✕[2.4✕ 400

Capillary tube

[3.0✕[2.0✕ 200

Refrigerant flow in cooling Refrigerant flow in heating

Reversing valve coil heating ON cooling OFF

REFRIGERANT SYSTEM DIAGRAM

MXZ-32SV MXZ-32SV -

E1 E2

Unit:mm

Piping length each indoor unit (a, b, c, d) 25m Total piping length (a+b+c+d) 60m Height difference between units (H) 10m Bending point for each unit 25 Total bending point 60

❋It does not matter which unit is higher.

● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the

● When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.

tables below.

For further information on Different-diameter pipe,see page BACK COVER.

Indoor unit

class Pipe diameter

07/09

12(13)

Liquid 6.35(1/4) Liquid 6.35(1/4)

Gas 9.52(3/8) Gas 9.52(3/8)

Liquid 6.35(1/4) Liquid 6.35(1/4)

Gas 12.7(1/2) Gas 12.7(1/2)

Liquid 6.35(1/4) Liquid 6.35(1/4)

Gas 15.88(5/8) Gas 15.88(5/8)

Extension pipe diameter

Outdoor unit union diameter

For

Indoor unit A

Indoor unit B

Indoor unit C

Indoor unit D

Liquid 6.35(1/4)

Gas 12.7(1/2)

Liquid 6.35(1/4)

Gas 12.7(1/2)

Liquid 6.35(1/4)

Gas 9.52(3/8)

Liquid 6.35(1/4)

Gas 9.52(3/8)

Unit : mm (inch)

Page 13

Wet-and dry-bulb thermometers

07 class

7.5

7.0

6.4

5.9

5.3

4.8

8.7

8.1

7.4

6.8

6.2

5.6

10.8

10.1

9.3

8.5

7.7

7.0

6.7

6.2

5.8

5.3

4.8

4.3

18 class

12 class

09 class

32.3

29.8

27.3

24.9

22.4

19.9

17.4

14.9

38.2

35.3

32.4

29.4

26.5

23.5

20.6

17.6

25.9

23.9

21.9

19.9

17.9

15.9

13.9

11.9

27.7

25.6

23.4

21.3

19.2

17.0

14.9

12.8

07 class

09 class

12 class

18 class

PERFORMANCE CURVES

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions, since 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

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °CWB (2) Indoor outlet air wet-bulb temperature : °CWB (3) Outdoor intake air dry-bulb temperature : °CDB

}

Cooling

(4) Total input: W (5) Indoor intake air dry-bulb temperature : °CDB (6) Outdoor intake air wet-bulb temperature : °CWB (7) Total input : W

}

Heating

Indoor air wet/dry-bulb temperature difference on the left side of the chart on this 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.

How to measure the indoor air wet-bulb/dry-bulb temperature difference

1. Attach at least 2 sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2. Attach at least 2 sets of wet-and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL(HEAT) MODE.

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

INDOOR UNIT OUTDOOR UNIT

10-1-1.CAPACITY AND THE INPUT CURVES

Page 14

10-3-.2.Capacity and input correction by inverter output frequency

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

Frequency

<HEAT>Total input

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

Frequency

<HEAT>Total input

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

Frequency

<HEAT>Total input

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

0 50 100 150

0.5

1.0

1.5

Frequency

<HEAT>Total input

1. 07-class unit in single operation

2. 09-class unit in single operation

3. 12-class unit in single operation

4. 18-class unit in single operation

(OUTDOOR UNIT:MXZ-32SV)

The dotted line on graphs connects the frequency range in normal operation shown by the full line and the frequency in test run shown by the point.

Page 15

0 5 10 15 20 25

Ambient temperature(:)

45Hz

Outdoor unit current (A)

Ambient temperature(:)/ Ambient humidity(%)

Outdoor low pressure

(MPa•Gauge)

(kgf/F•Gauge)

Outdoor unit current (A)

20 25

0.2

0.3

0.4

0.5

0.6

0.7

0.8

(;) (%)

33Hz

15 20 25 30

(;) (%)

33Hz

10-3-4.Outdoor low pressure and outdoor unit current

1. 07-class unit in single operation

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

The converted score against the traditional unit system can be gotten according to the formula below.

1(MPa • G) =10.2(kgf/

(1) COOL operation

1Both indoor and outdoor units are under the same temperature/humidity condition.

Dry-bulb temperature(°C) Relative humidity(%)

20 50 25 60 30 70

2Air flow speed : HI 3Inverter output frequency : 33Hz

• G)

1.Set emergency switch to COOL or HEAT. The switch is located on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at rated frequency.

4.Indoor fan runs at HI speed and continues for 30 minutes.

5.To cancel this operation, press emergency run ON/OFF button or any button on remote controller.

(2) HEAT operation

①

➁ ➂

Indoor Outdoor

Set air flow to Hi speed. Inverter output frequency is 45Hz.

DB(°C) 20.0

WB(°C) 14.5

DB(°C) 2 7 15 20.0 WB(°C) 1 6 12 14.5

Page 16

2. 09-class unit in single operation

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

The converted score against the traditional unit system can be gotten according to the formula below.

1(MPa • G) =10.2(kgf/ff• G)

(1) COOL operation

1Both indoor and outdoor units are under the same

temperature/humidity condition.

Dry-bulb temperature(°C) Relative humidity(%)

20 50 25 60 30 70

2Air flow speed : HI 3Inverter output frequency : 33Hz

1.Set emergency switch to COOL or HEAT. The switch is located on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at rated frequency.

4.Indoor fan runs at HI speed and continues for 30 minutes.

5.To cancel this operation, press emergency run ON/OFF button

or any button on remote controller.

(kgf/F•Gauge)

(MPa•Gauge)

0.8

0.7

0.6

0.5

0.4

Outdoor low pressure

0.3

0.2 15

Ambient temperature(:)/ Ambient humidity(%)

(2) HEAT operation

①

Indoor Outdoor

➁

Set air flow to Hi speed.

➂

Inverter output frequency is 45Hz.

DB(°C) 20.0

WB(°C) 14.5

20 25

WB(°C) 1 6 12 14.5

33Hz

Outdoor unit current (A)

(;)

DB(°C) 2 7 15 20.0

(%)

33Hz

15 20 25 30

Ambient temperature(:)/ Ambient humidity(%)

(;) (%)

45Hz

Outdoor unit current (A)

0 5 10 15 20 25

Ambient temperature(:)

Page 17

3. 12-class unit in single operation

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

The converted score against the traditional unit system can be gotten according to the formula below.

1(MPa • G) =10.2(kgf/ff• G)

(1) COOL operation

1Both indoor and outdoor units are under the same

temperature/humidity condition.

Dry-bulb temperature(°C) Relative humidity(%)

20 50 25 60 30 70

2Air flow speed : HI 3Inverter output frequency : 33Hz

(kgf/F•Gauge)

(MPa•Gauge)

0.8

1.Set emergency switch to COOL or HEAT. The switch is located on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at rated frequency.

4.Indoor fan runs at HI speed and continues for 30 minutes.

5.To cancel this operation, press emergency run ON/OFF button or any button on remote controller.

0.7

0.6

0.5

0.4

Outdoor low pressure

0.3

0.2 15

Ambient temperature(:)/ Ambient humidity(%)

(2) HEAT operation

①

Indoor Outdoor

➁

Set air flow to Hi speed.

➂

Inverter output frequency is 45Hz.

DB(°C) 20.0

WB(°C) 14.5

20 25

DB(°C) 2 7 15 20.0 WB(°C) 1 6 12 14.5

33Hz

(;)

(%)

33Hz

Outdoor unit current (A)

15 20 25 30

Ambient temperature(:)/ Ambient humidity(%)

(;) (%)

45Hz

Outdoor unit current (A)

0 5 10 15 20 25

Ambient temperature(:)

Page 18

4. 18-class unit in single operation

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

The converted score against the traditional unit system can be gotten according to the formula below.

1(MPa • G) =10.2(kgf/ff• G)

(1) COOL operation

①

Both indoor and outdoor units are under the same temperature/humidity condition.

Dry-bulb temperature(°C) Relative humidity(%)

20 50 25 60 30 70

➁

Air flow speed : HI

➂

Inverter output frequency : 33Hz

1.Set emergency switch to COOL or HEAT. The switch is located on indoor unit.

2.Press emergency run ON/OFF button.

3.Compressor starts running at rated frequency.

4.Indoor fan runs at HI speed.

5.To cancel this operation, press emergency run ON/OFF button or any button on remote controller.

(kgf/F•Gauge)

(MPa•Gauge)

0.8

0.7

0.6

0.5

0.4

Outdoor low pressure

0.3

0.2 15

Ambient temperature(:)/ Ambient humidity(%)

(2) HEAT operation

①

Indoor Outdoor

➁

Set air flow to Hi speed.

➂

Inverter output frequency is 45Hz.

DB(°C) 20.0

WB(°C) 14.5

20 25

DB(°C) 2 7 15 20.0

WB(°C) 1 6 12 14.5

33Hz

(;) (%)

33Hz

Outdoor unit current (A)

15 20 25 30

Ambient temperature(:)/ Ambient humidity(%)

(;) (%)

45Hz

Outdoor unit current (A)

0 5 10 15 20 25

Ambient temperature(:)

Page 19

Compressor power factor

Indoor unit microprocessor

SSR61

Drive

circuit

Transistor

module

Indoor Unit

Gas pipe temperature thermistor RT66, 67, 68, 69

Accumulator

Comp.

H.P.S 63H2

Discharge temperature thermistor RT61

Indoor Unit

Evaporation temperature thermistor RT63

Outdoor fan motor MF61

x 61 x 62 x 63

Defrost thermistor RT62

LEV1

LEV2

LEV3

LEV4

Indoor Unit

Outdoor unit control microprocessor

Compressor primary current

Compressor secondary current

Fin temperature thermistor RT65

R. V. coil 21S4

H.P.S 63H1

Input signal

Output signal

MICROPROCESSOR CONTROL

INVERTER MULTI SYSTEM CONTROL MXZ-32SV -

MXZ-32SV -

E1 E2

Page 20

11-1.LEV control

Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit.

Indoor unit status Stop of all indoor unit

Opening before stop ➝ 500 pulse in 15 minutes

When outdoor unit is operating, some indoor unit stops and some operates.

Thermostat OFF in

COOL or DRY mode

When the outdoor unit operation (When the other indoor unit operates): 5 pulse. When outdoor unit stops. (When the other indoor unit stops or thermo off): Maintain LEV opening before stop ➝ 500 pulse in 15 minutes

• LEV opening for each indoor unit is determined by adding adjustment in accordance with the number of operating unit and the capacity class to standard opening, based on the operation frequency: Ex.) Opening 130 pulse in standard opening 1 ➝ Minimum 80 pulse, Maximum 205

Thermostat ON in

COOL or DRY mode

pulse. (Capacity code 4 at 1 unit operation) (Capacity code 1 at 4 unit operation)

• After starting operation, adjustment in accordance with intake superheat, discharge temperature is included in standard opening. w1

Note: LEV opening in each frequency at DRY operation and COOL operation is the

same. However, velocity and compressor operation frequency controls are different. See 11-2 Operational frequency range (As far as the indoor unit velocity control goes, refer to DRY operation in MICROPROCESSOR CONTROL in the indoor unit service manual.)

• When the outdoor unit operates. (When the other indoor unit operates): 59 pulse

Thermostat OFF in HEAT mode

• When the outdoor unit stops. (When the other indoor unit stops or thermo off): Maintain LEV opening before stop ➝ 500 pulse in 15 minutes.

• LEV opening for each indoor unit is determined by adding adjustment in accordance with the number of operating unit and the capacity class to standard opening, based

Thermostat ON in HEAT mode

on the operation frequency: Ex.) Opening 120 pulse in standard opening 1 ➝ Minimum 70 pulse, Maximum 165 pulse. (Capacity code 4 at 1 unit operation) (Capacity code 1 at 4 unit operation)

• After starting operation, opening becomes the one that adjustment in accordance with discharge temperature was added to basic opening. w1

w1 LEV opening when the outdoor is unit operating: Upper limit 500, Lower limit 59

LEV opening

COOL : 5 pulse (fully closed) HEAT : 59 pulse (slightly opened)

Determination of LEV standard opening in each indoor unit

• The standard opening is on the straight line, which connects each standard point in the section where divided into seven according to the operation frequency of compressor as shown in the figure below. (LEV opening is controlled in proportion to the operation frequency.)

Note: Opening is adjusted at the standard opening according to the indoor unit conditions.

However, inclination of standard opening in each point of opening does not change with the original curve.

• Add opening provided in Difference in Capacity in the table below to the standard opening from 1 to 8, when capacity of the indoor unit is excluding code 1.

• Add opening provided in Difference in Operation number in the table below to determined LEV opening for each indoor unit, when 2, 3 or 4 indoor units are operated at the same time.

Note: Even when the adjusted standard opening exceeds the driving range from 59 to 500 pulse, actual

driving output opening is in a range from 59 to 500 pulse. < Calculation example of LEV opening > Cool operation: Compressor frequency 70Hz: 2 unit ON: 18class (170-150)p(80-60)o(70-60)+150+75-30=205 pulse

Standard opening

1 2 3 4 5 6 7 8

220 210 200 190 180 170 160 150 140

LEV opening (Pulse)

130 120

7 20 40 60 80 100 120 140

COOL

HEAT

Operation frequency of compressor (Hz) : F

Page 21

(1) LEV opening correction by suction superheat (COOL, DRY)

1 Suction superheat

(MIN gas pipe temperature thermistor - Evaporation temperature thermistor)

2 Each correction w 1

• (Each gas pipe temperature thermistor - Evaporation temperature thermistor)

• (Main pipe temperature thermistor - sub pipe temperature thermistor)

w 1 Perform this, when number of operation units is 2 units or more w 2 When the correction opening of suction superheat is 0, correct the LEV opening by discharge temperature.

3 Discharge temperature

COOL DRY HEAT

• •

•

w 2

•

w 2

•

(Suction superheat) = (Minimum gas pipe temperature) - (Evaporation temperature)

When COOL and DRY, correct the LEV openings corrected from the table below

(2) Separate correction (COOL,DRY)

(When number of operation unit is 2 units or more) (a) Correction by the separate superheat

Correct the LEV separately by temperature difference between each gas pipe temperature thermistor and evaporator temperature thermistor. 1 Calculate each superheat of the unit from the expression below;

(Superheat) = (Gas pipe temperature thermistor) - (Evaporation temperature thermistor)

2 Select minimum superheat from among them. 3 Each LEV opening is corrected by difference between each superheat and minimum superheat.

Page 22

(3) LEV opening correction by discharge temperature

DRY

Min. Max. Rated Min. Max.

Defrost

Rated

Note: When the fan speed of indoor unit is totally Lo notch, restrict the maximum frequency is restricted in 6/7 of the rated frequency.

DRY COOL

COOL

HEAT

Number of

operating

unit

1 2 3 4 2 3 4 5 6 7 8 3 4 5 6 7 8 9 4 5 6 7 8 9

40 52 68 85

105

110

120

24 33 46 82

70 80

101

62 70 80 86

90 90

110

120

62 70 80 86

100

36 49 65 80

80 88

100

108

1 2 1 1 2 3

1 2 2 3 1 1

8/10 of maximum frequency 9/10 of maximum frequency 7/10 of maximum frequency

Maximum frequency

capacity

cord

When LEV correction output is 0 pulse by the suction superheat at cool or dry operation, or dry operating, correct LEV is corrected according to the following table.

The target discharge temperature is determined according to frequency zone and number of operation unit of the compressor.

Correct the LEV opening according to difference between the target discharge temperature and discharge temperature.

11-2.Operational frequency range

Page 23

11-3.Heat defrosting control

(1) Conditions to enter defrosting mode

1. When temperature of defrosting thermistor is -3; or less.

2.When specified non-defrosting time is counted in the control P.C.board.

(Total time of compressor operating) Going to defrosting mode at both condition of 1 and 2.

(2) Defrosting operation

1. Compressor stops for 50 seconds. Indoor fan is off. Defrosting lamp lights.

2.4-way valve reverses flow. Compressor operates by the frequency in heat defrosting control.

3. After compressor stops for 35 seconds, 4-way valve reverses flow, then defrosting finishes.

(3) Conditions to finish defrosting mode

1. When the defrosting thermistor temperature is 8; or more.

2. When it has spent 10 minutes for defrosting. Defrosting finishes at condition of 1 or 2.

11-4.High or low pressure protection

(1) High pressure protection control on heat mode

Temperature of the main pipe temp. thermistor in the indoor unit controls the operation frequency. When temperature of the main pipe temp. thermistor is approx. 49;, the operation frequency is set at the current level. When temperature of the main pipe temp. thermistor is approx. 52; the protection control decreases the frequency at the

speed of 3Hz a minutes. When temperature of the main pipe temp. thermistor is approx. 57; the protection decreases the frequency at the speed of

4Hz a minute and changes the outdoor fan to Low.

Note: Temperature of the pipe temp. thermistor is different depending on the indoor unit.

Temperature of the pipe temp. thermistor is 45; or less, the protection control is released.

(2) High pressure protection control by high pressure switch (H.P.S)

High-pressure switch controls the operation frequency and outdoor fan motor. <Control status> When high-pressure switch is ON. (When discharge pipe pressure is 2.75 MPa or more.) <Control details> (a) When cooling or drying

The protection control decreases the compressor frequency at the speed of 10Hz a minute. (The compressor operates continuously in min. frequency according to a command to decrease more than the min. level.)

(b) When heating

The protection control decreases the compressor frequency at the speed of 10Hz a minute.

The protection control changes the outdoor fan to Low. <Release status> When high-pressure switch is OFF. (When discharge pipe pressure is 2.35 MPa or more.) Or, the compressor stops.

11-5.Discharge temperature protection control

This protection controls the compressor ON/OFF and operation frequency according to temperature of the discharge temp. thermistor.

(1) Compressor ON/OFF When temperature of the discharge temp. thermistor exceeds 116;, the control stops the compressor.

When temperature of the discharge temp. thermistor is 80; or less, the controls starts the compressor. (2) Compressor operation frequency

When temperature of the discharge temp. thermistor is expected to be higher than 116;, the control decreases 12Hz from the

current frequency.

When temperature of the discharge temp. thermistor is expected to be higher than 111; and less than 116;, the control

decreases 6Hz from the current frequency.

When temperature of the discharge temp. thermistor is expected to be higher than 104; and less than 111;, the control is set

at the current frequency.

Page 24

11-6.Refrigerant recovery control on heating

The control performs when the following status are satisfied everything;

• When there is 1 unit or more not operating indoor unit on heat operation. (Excluding thermo OFF)

• When discharge temperature becomes 107; or more.

• When it passed 60 minutes or more since the operation has started or the last refrigerant recovery has controlled.

LEV opening, which adjusts to not operating indoor unit, is considered to be 80 pulse.

The control finishes either as follows. However, the LEV opening is considered to be 59 pulse.

• When it passed 60 seconds since the control has started.

• When the discharge temperature is 90; or less.

11-7.Outdoor fan control

Fan speed is switched according to a number of operating indoor unit and the compressor frequency.

Note

•When operation, fan speed of Hi/ Low mode changes to VHi/ Hi mode by promoting those fan speeds respectively by 1 step after defrosting is operated. This control is cleared, when the compressor off.

•When overheat protection of P.C. board temperature or fin temperature operates, the outdoor fan speed is fixed to VHi mode regardless of compressor frequency. Also, when the overheat protection is cleared, the fan speed is back to normal

•When the indoor coil thermistor is 57; or more on HEAT operation, fan speed is fixed to Low notch . Or, the indoor coil thermistor is 45; or less on HEAT operation, fan speed is back to normal.

11-8.Relation between main sensor and actuator

Relation between main sensor and actuator.

Page 25

12 TROUBLESHOOTING

Lead wiring

Housing point

Operation start

Check the outdoor unit LED indicator

A Check of power supply on page 29.

• Indoor unit serial signal error B Check of serial signal on page 29.

• Cool or HEAT operation only C Check of R.V.coil on page 30.

• When cooling, room does not cool. E Check of inverter, compressor on page 31.

• When cooling, heat exchanger of non-operating indoor unit frosts.

•When heating, non operating indoor unit gets warm. D Check of LEV on page 31.

• When cooling, dew drops in the non-operating indoor unit Check of mispiping.

• When heating, room does not get warm. E Check of inverter, compressor on page 31. Check mis-piping. Shortage of capacity

Refer to indicator list on page 26 and 27.

OFF

"00"

• Check the indoor unit with referring to the indoor unit service manual, and confirm that there is any problem in the indoor unit. Then, check the outdoor unit with referring to this page.

Display other than "00"

12-1. Cautions on troubleshooting

1. Before troubleshooting, check the following:

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for mis-wiring.

2. Take care the following during servicing.

1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the unit, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.

2) Be sure to unplug the power cord before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board.

3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.

4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

3. Troubleshooting procedure

1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.

To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the

components for bursting and discoloration.

3) When troubleshooting, refer to the flow chart on this page and the check table on page 26 and 27.

12-2. Instruction of troubleshooting

Page 26

12-3. Troubleshooting check table

Note . LED indicates "00" in the normal status.

7-segment LED display

❈

If there is defect in the following parts(electronic control P.C. board, relay P.C. board, high pressure switches(63H1,63H2),indoor /outdoor fan motor , or indoor coil thermistor), the compressor may stop even with the display remained at “ 00 “.In any case, reset the breaker and check the above-stated parts.

Symptom Outdoor unit does not operate.

Display Detecting method Detecting method Check points

aa44

(A4)

Outdoor power system abnormality

When the compressor operation has been interrupted by overcurrent protection continuously three times within 1 minute after start-up, the compressor stops operation.

Error mode

Normal

• Inverter output

• Compressor

aa33

(A3)

(P1)

Symptom Outdoor unit stops and restarts every 3 minutes.

Display Detecting method Detecting method Check points

ee99

(E9)

ee66

(E6)

ff88

(F8)

aa88

Outdoor electronic control P.C. board abnormality

Indoor unit and LEV abnor-

pp11

mality

Evaporation temperature thermistor abnormality

Discharge temperature thermistor abnormality

Fin temperature thermistor abnormality

Overcurrent protection

(A8)

dd66

(d6)

dd44

(d4)

Discharge temperature overheat protection

Fin temperature overheat protection

dd77

High pressure protection

(d7)

ff55

(F5)

ff66

(F6)

(F7)

pp99

(P9)

Room-A gas pipe temperature thermistor abnormality

Room-B gas pipe temperature thermistor abnormality

Room-C gas pipe temperature

ff77

thermistor abnormality

Room-D gas pipe temperature thermistor abnormality

When the nonvolatile memory data cannot be read properly on the outdoor controller board

When the drain abnormality is detected in the indoor unit and the indoor main coil temperature is too low, or when any abnormality is detected in the components of indoor unit

The compressor stops when a short or open circuit occurs in the evaporation temperature thermistor during compressor running.

The compressor stops when a short or open circuit occurs in the discharge temperature thermistor during compressor running.

The compressor stops when a short or open circuit occurs in the fin temperature thermistor during compressor running.

When over current is applied to the power module, the compressor stops and restarts in 3 minutes.

When the discharge temperature thermistor detects 116˚C or above, the compressor stops and restarts operation in 3 minutes. (Protection will be released at 100; or below.)

When the fin temperature thermistor detects 89˚C or above, the compressor stops and restarts operation in 3 minutes.

When the compressor starts, primary current or output voltage stops the compressor and restarts in 3 minutes.

When a short or open circuit occurs in the Room-A gas pipe temperature thermistor.

When a short or open circuit occurs in the Room-B gas pipe temperature thermistor.

When a short or open circuit occurs in the Room-C gas pipe temperature thermistor.

When a short or open circuit occurs in the Room-D gas pipe temperature thermistor.

• Outdoor electronic control P.C. board

• Check the abnormality indication on the indoor unit.

• LEV

• Check the characteristic of the evaporation temperature thermistor. Refer to

on page 32.

• Check the contact of P.C. board connectors.

• Check the characteristic of the discharge temperature thermistor. Refer to FFon page 32.

• Check the contact of P.C. board connectors.

• Check the characteristic of the fin temperature thermistor. Refer toFFon page 32.

• Check the contact of P.C. board connectors.

• Check the inverter and compressor. Refer to EEon page 31.

• Check the amount of gas.

• Check the indoor/outdoor air flow for short cycle.

• Check the indoor unit air filter for clogging.

• Check the amount of gas and the refrigerant cycle.

• Check the outdoor unit air passage.

• Check the power module.

• Check the outdoor fan motor. Refer to on page 32.

• Amount of gas

• Outdoor unit air passage.

• Check the ball valve.

• Room Agas pipe temperature thermistor characteristic.

• Contact of P.C. board connectors.

• Room B gas pipe temperature thermistor characteristic.

• Contact of P.C. board connectors.

• Room C gas pipe temperature thermistor characteristic.

• Contact of P.C. board connectors.

• Room D gas pipe temperature thermistor characteristic.

• Contact of P.C. board connectors.

Page 27

Symptom Outdoor unit operates. (The compressor operates at reduced frequency.)

Display Detecting method Detecting method Check points

dd88

(d8)

dd99

(d9)

dd77

(d7)

dd66

(d6)

dd33

(d3)

(d1)

Symptom Outdoor unit operates.

Display Detecting method Detecting method Check points

Frequency drop by current protection

Frequency drop by overload protection

Frequency drop by high pressure protection

Frequency drop by defrosting in cooling

Frequency drop by discharge temperature protection

Frequency drop by high pressure switch protection

Low discharge temperature

dd11

protection

ee77

Defrost thermistor abnormality

(E7)

When the outdoor unit input current exceeds 22.5 A, the compressor operates at reduced frequency.

When the compressor load exceeds the specified value, the compressor operates at reduced frequency.

When indoor pipe temperature exceeds 55˚C during heating, the compressor operates at reduced frequency.

When the indoor pipe temperature falls to 6˚C or below during cooling, the compressor operates at reduced frequency.

When the discharge temperature exceeds 110˚C, the compressor operates at reduced frequency.

When the high pressure exceeds 2.75MPa (28 kgf/cm2-G), the compressor operates at reduced frequency. In addition, the fan speed changes.

When the state with low discharge temperature of which 50˚C in COOL and 48.4 or less in HEATfor 20 minutes, the compressor operates continuously.

When a short or open circuit occurs in the defrost thermistor during heating * In this case, the compressor continues to operate.

These symptoms do not mean any abnormality of the product, but check the following points.

• Air filter clogging.

• Amount of gas.

• Short cycle of indoor/outdoor air flow.

• Amount of gas.

• Outdoor unit air passage.

Check the amount of gas.

• Replace the outdoor controller board.

• Check the contact of LEV board connectors.

• Defrost thermistor characteristic.

• Contact of P. C. board connectors.

hh44

(h4)

Power factor detection abnormality

When the compressor power factor cannot be detected * In this case, the compressor keeps running.

• Compressor wiring.

Page 28

WHT

RED

BLK

LEV

WHT

RED

YLW

BRN

ORN

BLU

12-4. Trouble criterion of main parts

WHT

Protector specification

Short Open

95I15: 135I5:

BLK

ORN BLU

RED YLW

Part name Check method and criterion

Defrost thermistor Evaporation / Gas pipe temperature thermistor

Discharge temperature thermistor

Compressor

Outdoor fan motor

Measure the resistance using a tester. (Part temperature -10°C ~ 40°C)

Normal abnormal

5kΩ ~ 55kΩ Opened or short-circuited

Measure the resistance using a tester, after warming up the thermistor by holding by hand. (Part temperature : 20°C ~40°C)

Normal abnormal

100kΩ ~ 250kΩ Opened or short-circuited

Measure the resistance between terminals using a tester. (Winding temperature : -10°C ~ 40°C)

Normal abnormal

1Each phase 0.53Ω ~ 0.66Ω Opened or short-circuited

Measure the resistance between lead wires using a tester. (Part temperature : -10°C ~ 40°C)

WHT - BLK

BLK - YLW

YLW - BLU

RED - BLK

Normal

69.0Ω ~ 86.0Ω

23.0Ω ~ 30.0Ω

10.0Ω ~ 13.0Ω

73.0Ω ~ 91.0Ω

abnormal

Opened or short-circuited (Not including

WHT - ORN)

R. V. coil

Linear expansion valve

High pressure switch (HPS)

Measure the resistance using a tester. (Part temperature -10°C ~ 40°C)

Normal abnormal

1640Ω ~ 2310Ω Opened or short-circuited

Measure the resistance using a tester.(Part temperature -10°C ~ 40°C)

Lead wire color Normal

Abnormal WHT - RED RED - ORN

YLW - BRN

21 ~ 26Ω

Opened or short-circuited

BRN - BLU

Measure the resistance using a tester. (Part temperature -10°C ~ 40°C)

Pressure Normal abnormal

Operation OFF HPS1 2.35 ± 0.15MPa (24 ± 1.5kg / cm2) HPS2 2.55 ± 0.2MPa (26 ± 2kg / cm2)

0.05

HPS1 2.75 MPa (28 kg / cm2) HPS2 3.43 MPa (35 kg / cm2)

0.1

0.15

0.5

1.0

1.5

Short

Other than

those list-

Open

ed at left

P Inner protector

Page 29

Outdoor unit does not operate. (LED display: display OFF)

Check of power supply

Start

Check the connecting of main circuit parts and connectors (CN501: I.P.M P. C. board, CN 801: Electronic control P. C. board, CN554: relay P. C. board).

Turn on power supply.

Is there voltage of 220V AC - 240V AC in the power supply terminal block?

Yes

Is there voltage of 310V DC - 340V DC across the smoothing capacity?

Yes

Replace the electronic control P. C. board.

Outdoor unit does not operate. (LED display:

Check of serial signal

Start

1. Check the indoor unit with referring to the indoor unit service manual.

2. Turn off the power supply of the indoor and outdoor unit and return the indoor/ outdoor unit connecting wire to former original.

3. Check the connection of indoor/ outdoor unit connecting wire in the outdoor unit terminal block, and check the connection of the connectors (CN601: unit A, CN 602: unit B, CN603: unit C, CN604: unit D) in the electronic control P. C. board.

4. Disconnect the lead wire to the compressor. Turn on the power supply (indoor/ outdoor unit) 3 minutes later, EMERGENCY OPERATION starts.

Check the power supply cable.

Is there voltage of 220V AC - 240V AC across the output cables (LD63, LD64) in the noise filter P. C. board?

Yes

Is there voltage of 220V AC - 240V AC across the input terminal part in the diode module (DS61)?

Yes

Check the main circuit parts and replace it.

0000

)

Replace the noise

filter P. C. board.

Replace the current

limiting resistor.

w When replacing, check the

connection of connector CN720 in the outdoor electronic control P. C. board.

Is there voltage of 5V DC - 10V DC between No. 3 (+) and N (-) in the outdoor terminal block?

Recheck a connected circumstance of the indoor/ outdoor unit connecting wire.

Yes

Replace the electronic control P. C. board.

Page 30

The cooling operation or heating operation does not operate. (LED display:

Check of R. V. coil

• When heating operation does not work.

Start

1. Disconnect the lead wire leading to the compressor.

2. Turn on power supply to the indoor and outdoor unit, three minutes later EMERGENCY OPERATION (HEAT operation) starts.

0000

)

Is there voltage of 220V AC - 240V AC between pin1 and pin 2 at connector CN913?

Yes

Turn off power supply of indoor and outdoor unit.

Disconnect the connector CN913 in noise filter P. C. board. Is there normal resistance to R.V. coil?

Yes

Replace the 4-way valve.

• When cooling operation does not work.

Start

1. Disconnect the lead wire leading to the compressor.

2. Turn on power supply to the indoor and outdoor unit, three minutes later EMERGENCY OPERATION (COOL operation) starts.

Replace the R. V. coil.

1. Turn off power supply of indoor and outdoor unit, and disconnect the connectors (CN851, CN852) in the electronic control P. C. board.

2. Turn on power supply to the indoor and outdoor unit, three minutes later EMERGENCY OPERATION (HEAT operation) starts.

Is there voltage 12V DC between the connector CN852 pin 1 (+) and pin 5 (-)?

Yes

Replace the noise filter P. C. board.

Replace the electronic control P. C. board.

Is there voltage of 220V AC - 240V AC between pin1 and pin 2 at connector CN913?

Yes

1. Turn off power supply of indoor and outdoor unit, and disconnect the connectors (CN851, CN852) in the electronic control P. C. board.

2. Turn on power supply to the indoor and outdoor unit, three minutes later EMERGENCY OPERATION (COOL operation) starts.

Is there voltage 12V DC between the connector CN852 pin 1 (+) and CN851 pin 5 (-)? W1

Yes

Replace the electronic control P. C. board.

Replace the noise filter P. C. board.

W1If the connector CN913 is not connected or R. V. coil is open, voltage

occurs between terminals even when the control is OFF.

Replace the 4-way valve.

Page 31

• When cooling, heat exchanger of non-operating indoor unit frosts.

• When heating, non-operating indoor unit get warm.

Start

0000, pp11

)

(LED display:

Check of LEV

Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely.

Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with a hand?

Disconnect the connectors (CN791: unit A, CN792: unit B, CN793: unit C, CN794: unit D). Is there normal resistance to LEV coil?

Replace the LEV coil.

Yes

Normal

Yes

Replace the electronic control P. C. board.

• When heating, room does not get warm.

• When cooling, room does not get cool. (LED display:

Check of inverter/ compressor

0000, aa88

)

Start

Disconnect the lead wire to the compressor at terminals, and turn on power supply to the indoor and outdoor unit. Three minutes later, EMERGENCY OPERATION starts.

W1 • After the outdoor fan starts running, wait for 1 minutes or more before Measure the voltage between each leading to the compressor. U (BLK) - V (WHT) V (WHT) - W (RED) W (RED) - U (BLK) Output voltage COOL: 100V(58Hz) HEAT: 100V(58Hz) Is there voltage output? W1

Yes

Is output balanced?

Yes

measuring the voltage.

•The output voltage values have the tolerance of i20%.

Is the overcurrent protection error shown on the LED monitor?

Yes

1.Turn off power supply of the indoor

and outdoor unit, and disconnect the connector CN 551 in the relay P. C. board.

2.Turn on power supply to the outdoor

Replace the electronic control P. C. board with the I.P.M P. C. board.

unit, and after 1 minutes or more passed, check the resistance between the connector CN551 pin 1 and pin 2.

Turn off power supply of indoor and outdoor unit, and measure the compressor winding resistance between the compressor terminals.

Is there resistance of 0.27" to 0.34" between the each terminals?

Yes

Return the lead wire of compressor to former, and turn on power supply to indoor and outdoor unit. Three minutes later EMERGENCY OPERATION starts.

Replace the compressor.

Check the resistance between each terminal.

After 1 minute has passed since the power supply of outdoor unit was turned off, disconnect the connector CN 553 in the relay P. C. board.

Infinite

Clarify the causes by counting time until the inverter stops. 0 to 10 seconds: compressor rare short 10 to 60 seconds: compressor lock 60 seconds to 5minutes: refrigerant circuit defective 5 minutes or more: normal

Replace the relay P. C. board.

Check the resistance HPS (63H2).

Replace the HPS (63H2).

Infinite

Page 32

• When thermistor is abnormal.

Check of thermistor

Start

Disconnect the connector in the electronic control P. C. board (see below table), and measure the resistance of thermistor to check whether the thermistor is normal or not.

Normal

Reconnect the connectors (CN661, CN662 and CN663) and disconnect the lead wire leading to the compressor. Turn on power supply to the indoor and outdoor unit. Three minutes later EMERGENCY OPERATION starts.

Does thermistor operate 10 minutes or more though the thermistor abnormality is not displayed?

Yes

Normal

Thermistor Defrost thermistor Discharge temperature thermistor Evaporation temperature thermistor Gas pipe temperature thermistor (Unit A) Gas pipe temperature thermistor (Unit B) Gas pipe temperature thermistor (Unit C) Gas pipe temperature thermistor (Unit D) Fin temperature thermistor

• Fan motor does not operate. Or, fan motor stops at once’after fan motor operates.

Check of fan motor

Symbol

RT62 RT61 RT63 RT66 RT67 RT68 RT69 RT65

Replace the electronic control P. C. board.

Connector, Pin No. Between CN661 pin1 and pin2 Between CN661 pin3 and pin4 Between CN661 pin5 and pin6 Between CN662 pin1 and pin2 Between CN662 pin3 and pin4 Between CN662 pin5 and pin6 Between CN662 pin7 and pin8 Between CN663 pin1 and pin2

Abnormal

Replace the thermistor.

Start

Check the connection of fan motor connector, connectors (CN851, CN852) on electronic control P. C. board, and connectors (CN901, CN902) on noise filter P. C. board.

Disconnect the fan motor connector, and measure the resistance of the fan motor winding to check the winding characteristic.

Normal

1. Disconnect the lead wire leading to the compressor. Turn on power supply to the indoor and outdoor unit. Three minutes later, EMERGENCY OPERATION starts.

2. Check the voltage between pin 2 and pin 3, pin 2 and pin 5, pin 2 and pin 6 at the fan motor connector.

Is there voltage of 220V AC - 240V AC?

1. Turn off power supply of the indoor and outdoor unit, and disconnect the connector (CN851, CN852).

2. Is the voltage 0V, when the voltage between CN852 pin1 (+) and CN851 pin1 (-), pin2 (-), or pin3 (-) are measured after the power supply is turned on the outdoor unit?

Yes

Is there voltage of 12V DC between CN852 pin1 (+) and pin3 (-), when power supply turns on the indoor unit and EMERGENCY OPERATION starts in three minutes?

Yes

Replace the noise filter P. C. board.

Yes

Abnormal

Replace the fan motor.

Replace the electronic control P. C. board.

Page 33

Infinity

Yes

Start

1. Disconnect the connector CN722 in the electronic control P. C. board.

2. Check the resistance of HPS after 1 minute has passed since the outdoor unit power supply was turned off.

Check the resistance between each terminal?

Reconnect CN722. Turn on power supply to the indoor and outdoor unit. 3 minutes lator, EMERGENCY OPERATION starts.

Is HPS protection displayed immediately after compressor starts?

Replace HPS (63H1).

Replace the electronic control P. C. board.

Normal

• When the operation frequency does not go up from lowest frequency.

Check of HPS

The other cases

In the case that the indoor fan and outdoor fan operate but the compressor does not operate, it causes that the high pressure switch can be operated once. First of all, check the high pressure switch can be shorted, turn OFF the power and turn ON again 1 minute later. Indoor unit dose not operate. (difference modes)

• When you try to run two indoor unit simultaneously, one for cooling and the other for heating, the unit which transmits signal to the outdoor units earlier decides the operation mode. The other unit indicates as shown in the figure below.

• When the above situation occurs, set all the indoor units to the same mode, turn OFF the indoor units, and then turn them back ON.

• Though the top of the indoor unit sometimes gets warm, this does not mean malfunction. The reason is that the refrigerant gas continuously flows into the indoor unit even while it is not operating.

OPERATION INDICATOR

Lighting Flashing

Page 34

TEST POINT DIAGRAM AND VOLTAGE MXZ-32SV

MXZ-32SV -

E2E1

Electronic control P.C.board

Discharge temperature thermistor

Resistance (kΩ)

Temperature(;)

Gas pipe temperature thermistor Evaporation temperature thermistor Defrost temperature thermistor

Resistance (kΩ)

Discharge temperature thermistor

0.3~0.6V DC

Evaporation temperature thermistor

2.5~4.0V DC

Fin temperature thermistor

1.0~4.0V DC

Temperature(;)

12V DC

0~5V DC

{

Defrost temperature thermistor

2.5~4.0V DC

Outdoor fan ON 12V DC

Outdoor fan Lo 12V DC

R.V. coil 12V DC

Outdoor fan Me 12V DC

{

Serial signal Room D 5~10V DC

Resistance (kΩ)

Temperature(;)

{

Serial signal Room C 5~10V DC

{

Serial signal Room B

5~10V DC

{

Serial signal Room A 5~10V DC

{

Relay 12V DC

{

5V DC

LED monitor indication

Room D

Room C

Room B

Room A

Gas pipe temperature thermistor 2.5~4.0V DC

{

High pressure switch

Liner expansion valve(LEV) 12V DC pulse wave

Page 35

Noise filter P.C.board

MXZ-32SV

OUTDOOR FAN 220V-240V AC

{

220V-240V AC OUTPUT

{

220V-240V AC INPUT

REVERSING VALVE

MXZ-32SV

220V-240V AC

OUTDOOR FAN 230V AC

{

230V AC OUTPUT

FUSE 3.15A VARISTOR

REVERSING VALVE

230V AC

{

230V AC INPUT

{

Page 36

I.P.M P.C.board MXZ-32SV

MXZ-32SV -

12V DC

{

12V DC

{

320V DC

Relay P.C.board

MXZ-32SV

MXZ-32SV -

High pressure switch

12V DC

{

Short

Page 37

DISASSEMBLY INSTRUCTIONS

13-1. MXZ-32SV - , MXZ-32SV -

E2E1

OUTDOOR UNIT

OPERATING PROCEDURE PHOTOS

1.Removing the compressor

(1)Remove the screws of the service panel, and remove it.

Release refrigerant gas. (2)Remove the screws of the top panel, and remove it. (3)Remove the screws of the front panel, and remove it. (4)Disconnect the compressor lead wire. (TAB64,TAB65,TAB66) (5)Disconnect the ourdoor electronic control P.C. board

connectors CN791, CN792, CN793, CN794, CN662,

CN722 and CN661. Disconnect the noise filter P.C. board con-

nectors CN913.

Disconnect the fan motor connector. (6)Remove the four screws of the electrical parts, and remove

them. (7)Remove the propeller. (8)Remove the screws of the separator, and remove it. (9)Detach the brazed joints of the compressor suction and dis-

charge pipes. (See Photo 3.) (10)Remove the three compressor nuts and remove the com-

pressor.

Photo 1

Top panel

Service panel

Front panel

Photo 2

Control P.C.board

Photo 3

Electrical parts

Sepatator

Terminal

Discharge pipe brazed part

Suction pipe braxed part

Page 38

OPERATING PROCEDURE PHOTOS

2.Removing the fan motor

(1)Remove the top panel (five screws),the service panel (four

screws), and the front panel (two screws).

(See Photo 1.) (2)Disconnect the fan motor connector. (3)Remove the propeller. (4)Remove the fan motor.

3.Removing the 4-way valve

(1)Remove the screws of the top panel, and remove it.

(See Photo 1.)

(2)Remove the service panel, rear panel, and connect cover

panel.Recover refrigerant gas. (3)Remove the electrical parts. (See Photo 2.) (4)Detach the brazed joint of 4-way valve and pipe.

(See Photo 4.)

4.Removing the linear expansion valve

(1)Remove the service panel. (See Photo 1.)

(Gas recovery is not required if the unit is pumped down.) (2)Remove the coil of linear expansion valve. (3)Detach the brazed joint of linear expansion valve and pipe.

Photo 4

4 way valve

R. V. coil

Brazing Points

Photo 5

LEV coils

Linear expansion valves

Page 39

OPERATING PROCEDURE PHOTOS

5.Removing the reactor

(1)Remove the screws of the top panel, and remove it.

(See Photo 1.) (2)Disconnect the reactor lead wire. (3)Remove the screws of the reactor, and take it out.

Photo 6

Reactor

Page 40

1 2 3 4 5 6 7 8 9

11 12 13 14 15

17 18 19 20 21 22

M21 17A 501 T2W E40 301 T2W E40 452

M21 17A 447

M21 17A 443

M21 17E 337 T2W E40 357 T2W E40 356 T2W E70 451 T2W E79 424 T2W G01 424 T2W E58 376 T2W E65 375

M21 42A 340 T2W E70 307

M21 42A 308

M21 17A 362 T2W G01 362 T2W E70 308 T2W E70 398 T2W E40 441 T2W E66 382 T2W E89 313

M21 370 378

PROPELLER FAN OUTDOOR FAN MOTOR I.P.M P.C. BOARD DIODE STACK DIODE MODULE REACTOR POWER FACTOR CAPACITOR SMOOTHING CAPACITOR ELECTRONIC CONTROL P.C. BOARD NOISE FILTER P.C. BOARD NOISE FILTER P.C. BOARD TERMINAL BLOCK TERMINAL BLOCK RELAY GAS PIPE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR RESISTOR RESISTOR THERMISTOR SET R. V. COIL RELAY P.C. BOARD FUSE FUSE & VARISTOR SET TERMINAL BLOCK

MF61

DS62 DS61

C61

C62,C63

X64

RT66,67,68,69

RT65

RT61, 62, 63

21S4

F801, F911

F912, NR63

TB4

1 1 1 1 1 1 1 2 1 1

4 1 1 1 1 1

1 1 1 2

No. Parts Name

Symbol

in Wiring

Diagram

Parts No.

Q'ty / unit

MXZ-32SV-

Remarks

RA6V60-

220+ 400V 2500+ 400V

Indoor unit connecting

Power supply

A,B,C,D

EVAPORATION DISCHARGE, DEFROST

250V/ 3.15A

MXZ-32SV-

1 1 1 1 1 1 1 2 1

1 4 1 1 1 1

1 1 2 1

PARTS LIST

14-1. OUTDOOR UNIT FUNCTIONAL PARTS MXZ-32SV MXZ-32SV -

E1 E2

Part numbers that are circled are not shown in the illustration.

Page 41

14-2. OUTDOOR UNIT STRUCTURAL PARTS

1 2 3

9 10 11 12 13 14 15 16 17 18 19 20 21 22

M21 AS2 232

M21 17A 245 T92 500 800 T2W E70 654 T2W E95 654 T2W E95 655 T2W E70 653 T2W E95 653 T2W E95 655 T2W E70 652 T2W E95 652 T2W E95 655 T2W E70 651 T2W E95 651 T2W E95 655 T2W E79 290

M21 42E 644 T2W E40 247 T2W E70 248

M21 48A 961 T2W E79 646

M21 17A 297 T2W E40 523

M21 42E 630

M21 17A 249 T2W E40 646

M21 986 936

M21 LV0 936 T2W E59 936 T2W E70 936

FRONT PANEL SERVICE PANEL COMPRESSOR EXPANSION VALVE LEV COIL EXPANSION VALVE EXPANSION VALVE LEV COIL EXPANSION VALVE EXPANSION VALVE LEV COIL EXPANSION VALVE EXPANSION VALVE LEV COIL EXPANSION VALVE BASE ASSEMBLY UNION PIPE COVER REAR PANEL 4-WAY VALVE HIGH PRESSURE SWITCH TOP PANEL REAR GUARD HEAT EXCHANGER SIDE PANEL HIGH PRESSURE SWITCH CAPILLARY TUBE([4.0O[2.4O2000) CAPILLARY TUBE SET([3.0O[2.0O200) CAPILLARY TUBE ([2.5O[0.6O1000) CAPILLARY TUBE ([2.0O[0.6O750)

LEV D

LEV C

LEV B

LEV A

63H1

63H2

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 4 1 1

No. Parts Name

Symbol

in Wiring

Diagram

Parts No.

Q'ty / unit

MXZ-32SV-

Remarks

THV-247FBA D room D room D room C room C room C room B room B room B room A room A room A room

1/2,3/8,1/4 SET

2.75MPa(28kg/cm2)

3.43MPa(35kg/cm

)

[4.0O[2.4O400

[3.0O[2.0O200 4PCS/SET

[2.5O[0.6O1000 [2.5O[0.6O750

MXZ-32SV-

MXZ-32SV MXZ-32SV -

Part numbers that are circled are not shown in the illustration.

E1 E2

17 14

4 5

13 1215

When servicing , cut the tube to the proper length as shown in the REFRIGERANT SYSTEM DIAGRAM on page 12.

Page 42

No. Parts Name

Symbol

in Wiring

Diagram

Parts No.

Q'ty / unit

Remarks

MXZ-32SV

T2W E59 704

DRAIN SOCKET ASSEMBLY

DRAIN SOCKET O1 DRAIN CAP O2

14-3. ACCESSORY PARTS MXZ-32SV -

MXZ-32SV -

Page 43

OPTIONAL PARTS

15-1. Different-diameter pipe

MXZ-32SV

Model name

Model code

Connected pipes

diameter (mm)

Length

Unit : mm (inch)

MAC-454JP

51H-454

For differentdiameter

MAC-455JP

51H-455

pipes

MAC-456JP

516456

15-2. Outlet guide

Changes air discharge direction.

Applied unit Model name Model code

MXZ-32SV MAC-855SG 51H-855

610.4 534 386

5 - [6

Punched hole

416

{9.52 — {12.7

(3/8) (1/2)

{12.7 — {9.52

(1/2) (3/8)

{12.7 — {15.88

(1/2) (5/8)

150

109.4

51.8

6.46.4

29.2760.829.2

{9.52

(3/8)

{12.7

(1/2)

{12.7

(1/2)

{12.7

(1/2)

{9.52

(3/8)

{15.88

(5/8)

66.5

386 534

832

5 - [6

Punched hole

MAC-855SG

Page 44

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jun. 2006. No.OB254 REVISED EDITION-B 7 Distributed in Jan. 2003. No.OB254 REVISED EDITION-A 7 Reprinted in Feb. 2002. No.OB254 12 Reprinted in Dec. 2001. No.OB254 5 Reprinted in Dec. 2001. No.OB254 50 Reprinted in Feb. 2001. No.OB254 10 Distributed in May 2000. No.OB254 523 Made in Japan

New publication, effective Jun. 2006 Specifications subject to change without notice.

Mitsubishi MXZ-32SV-E1, MXZ-32SV-E2 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual