Mitsubishi Electric MXZ-18NV User manual

SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. INDOOR /OUTDOOR
CORRESPONDENCE TABLE··········3
4. INDOOR UNITS COMBINATION ·······················4
5. SPECIFICATION·················································9
6. OUTLINES AND DIMENSIONS························11
7. WIRING DIAGRAM ··········································13
8. REFRIGERANT SYSTEM DIAGRAM··············15
9. PERFORMANCE CURVES······························20
10. MICROPROCESSOR CONTROL ····················30
11. TROUBLESHOOTING······································39
12. DISASSEMBLY INSTRUCTIONS·····················53
13. PARTS LIST······················································57
14. OPTIONAL PARTS ····································BACK
Inverter-controlled multi system
Models
MXZ-18NV -
MXZ-32NV -
MXZ-18NV -
MXZ-32NV - E2
E2
E1
E1
No. OB185
REVISED EDITION C
This manual describes technical data of outdoor unit.
For indoor unit refer to the service manuals No.OB207 and OB196 REVISED EDITION A of corresponding
models.
Model indication
Revision:
●MXZ-18NV- and MXZ-18NV- have been added.
●Page layout has been changed.
●Performance curves has been modified.
●The graph of the outdoor low pressure in the HEAT
operation of the PERFORMANCE CURVE of MXZ-
32NV was deleted.
●Please void OB185 REVISED EDITION A and B.
E2E1
MXZ-32NV

2
Air out
Air in
Air outlet
Model indication
Air intake
Located on the back
and the left side.
PART NAMES AND FUNCTION2
1TECHNICAL CHANGES
MXZ-18LV- →MXZ-18NV-
1. Inverter assembly has changed.
2. Gas pipe thermistors were added.
3. H.P.S. has changed.
MXZ-18NV- →MXZ-18NV-
1. MSH-07NV- and MSH-12NV- has been added to the combination of the connectable indoor units.
2. Outdoor unit electronic control P.C. board has changed.
3. The outdoor fan speed control has changed.(HEAT mode single operation : Lo → Hi)
MXZ-32AV- →MXZ-32NV-
1. The desital display self-diagnosis function has adopted.
2. The desorption method of LEV has changed the screw method to the one touch method.
3. The position of the electronical parts has changed.
4. The chargeless system has adopted.
5. The scroll compressor has adopted.
6. The micro control P.C.board has simplifed.
7. The fan speed level has becomed 3 levels (Hi / Me / Lo).
8. The low pressure switch has adopted .
9. The ditection of connector deviation has becomed easily.
MXZ-32NV- →MXZ-32NV-
1. MCFH-13NV- and MCFH-18NV- has been added to the combination of the connectable indoor units.
E2E2
E2E1
E1E2
E2E2
E2E1
E1E1
Outdoor unit
Air inlet
Piping
Air outlet
Drain outlet
Drainage hose
(back and side)
MXZ-18NV
MXZ-32NV

3
3INDOOR / OUTDOOR CORRESPONDENCE TABLE
❈There is no combination other than this table.
MXZ-32NV- E2
MXZ-18NV- E2
OUTDOOR UNIT
Combination of the connectable indoor units
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
MXZ-32NV- E1
07+07+07
07+07+09
07+07+(12 or 13)
07+07+18
07+09+09
07+09+(12 or 13)
07+09+18
07+(12 or 13)+(12 or 13)
07+(12 or 13)+18
07+18+18
09+09+09
09+09+(12 or 13)
09+09+18
09+(12 or 13)+(12 or 13)
09+(12 or 13)+18
09+18+18
(12 or 13)+(12 or 13)+(12 or 13)
(12 or 13)+(12 or 13)+18
07+07+07+07
07+07+07+09
07+07+07+(12 or 13)
07+07+07+18
07+07+09+09
07+07+09+(12 or 13)
07+07+09+18
07+07+(12 or 13)+(12 or 13)
07+07+(12 or 13)+18
07+09+09+09
07+09+09+(12 or 13)
07+09+09+18
07+09+(12 or 13)+(12 or 13)
09+09+09+09
09+09+09+(12 or 13)
09+09+09+18
09+09+(12 or 13)+(12 or 13)
OUTDOOR UNIT
09+09
-
MXZ-18NV- E1
09+09
07+12
MXZ-18NV
MXZ-32NV

4
INDOOR UNITS COMBINATION
4
Outdoor unit
power consumption
(kW)
07
09
12
07+12
09+09
Indoor units
combination Unit B
Unit A
Cooling capacity (kW)
Total 220V 240V
Current
(A) Power
factor
(%)
2.3
2.5
3.4
2.0
2.25
-
-
-
2.5
2.25
2.3
(1.6 - 2.8)
2.5
(1.7 - 3.0)
3.4
(1.8 - 3.8)
4.5
(2.0 - 4.5)
4.5
(1.9 - 4.5)
1.02
(0.855 - 1.33)
1.05
(0.855 - 1.36)
1.45
(0.855 - 1.63)
2.00
(0.91- 2.00)
2.00
(0.91 - 2.00)
5.20
5.36
7.40
10.21
10.21
89 - 90
89 - 90
89 - 90
89 - 90
89 - 90
4.72
4.86
6.71
9.26
9.26
Outdoor unit
power consumption
(kW)
07
09
12
07+12
09+09
Indoor units
combination Unit B
Unit A
Heating capacity (kW)
Total 220V 240V
Current
(A) Power
factor
(%)
3.3
3.6
4.0
2.7
2.9
-
-
-
3.1
2.9
3.3
(2.0 - 4.0)
3.6
(2.0 - 4.5)
4.0
(2.2 - 4.7)
5.8
(2.1 - 5.8)
5.8
(2.0 - 5.8)
1.45
(0.69 - 1.60)
1.47
(0.69 - 1.62)
1.63
(0.69 - 1.69)
1.785
(0.69 - 1.785)
1.785
(0.69 - 1.785)
7.40
7.50
8.32
9.02
9.02
89 - 90
89 - 90
89 - 90
90 - 90
90 - 90
6.71
6.80
7.54
8.26
8.26
MXZ-18NV NOTE:Electrical data is for outdoor unit only.

5
07
09
12(13)
18
07+07
07+09
07+12(13)
07+18
09+09
09+12(13)
09+18
12(13)+12(13)
12(13)+18
18+18
07+07+07
07+07+09
07+07+12(13)
07+07+18
07+09+09
07+09+12(13)
07+09+18
07+12(13)+12(13)
07+12(13)+18
07+18+18
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
4.63
5.42
6.57
8.52
7.55
8.70
11.09
12.69
9.86
12.18
15.23
15.65
15.65
15.65
15.65
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
5.05
5.91
7.17
9.29
8.23
9.49
12.02
13.84
10.76
12.18
16.62
17.07
17.07
17.07
17.07
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
2.2
(1.8-2.7)
2.8
(1.8-3.2)
4.0
(2.2-4.5)
5.0
(2.2-5.4)
4.4
(3.0-5.4)
5.0
(3.0-6.0)
6.2
(3.0-7.2)
7.2
(3.0-7.6)
5.6
(3.0-6.4)
6.8
(3.0-7.6)
7.8
(3.0-8.6)
8.0
(3.0-8.8)
8.0
(3.0-8.8)
8.0
(3.0-8.8)
6.6
(3.7-8.1)
7.2
(3.7-8.5)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
7.8
(3.7-8.8)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
1.00
(0.96-1.14)
1.77
(0.96-1.36)
1.42
(1.00-1.63)
1.84
(1.00-1.99)
1.63
(1.30-2.03)
1.88
(1.30-2.23)
2.38
(1.30-2.98)
2.74
(1.30-2.98)
2.13
(1.30-2.43)
2.63
(1.30-2.88)
3.29
(1.30-3.60)
3.38
(1.30-3.60)
3.38
(1.30-3.60)
3.38
(1.30-3.60)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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
2.2
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
2.2
2.2
2.2
2.8
2.8
2.8
4.0
3.5
4.0
2.2
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
Heating capacity (kw)
Total
Outdoor unit
power consumption
(kw)
Current
(A) Power factor
(%)
220V 240V
NOTE: Electrical data is for outdoor unit only.
MXZ-32NV

6
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
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
14.95
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
16.31
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
8.0
(3.7-9.0)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
3.23
(1.30-3.96)
-
-
-
-
-
-
-
-
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
2.67
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
2.67
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
2.3
2.1
3.0
2.7
3.1
2.67
2.45
2.0
1.87
1.7
1.5
1.8
1.6
1.5
1.4
1.3
2.1
1.9
1.75
1.75
2.0
1.8
1.67
1.65
09+09+09
09+09+12(13)
09+09+18
09+12(13)+12(13)
09+12(13)+18
09+18+18
12(13)+12(13)
+12(13)
12(13)+12(13)+18
07+07+07+07
07+07+07+09
07+07+07+12(13)
07+07+07+18
07+07+09+09
07+07+09+12(13)
07+07+09+18
07+07+12(13)
+12(13)
07+07+12(13)+18
07+09+09+09
07+09+09+12(13)
07+09+09+18
07+09+12(13)
+12(13)
09+09+09+09
09+09+09+12(13)
09+09+09+18
09+09+12(13)
+12(13)
NOTE: Electrical data is for outdoor unit only.

7
NOTE: Electrical data is for outdoor unit only.
07
09
12(13)
18
07+07
07+09
07+12(13)
07+18
09+09
09+12(13)
09+18
12(13)+12(13)
12(13)+18
18+18
07+07+07
07+07+09
07+07+12(13)
07+07+18
07+09+09
07+09+12(13)
07+09+18
07+12(13)+12(13)
07+12(13)+18
07+18+18
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
5.55
6.62
8.29
9.72
9.17
10.32
13.05
13.05
11.01
13.05
13.05
13.05
13.05
13.05
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
6.06
7.22
9.04
10.61
10.00
11.26
14.24
14.24
12.02
14.24
14.24
14.24
14.24
14.24
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
3.4
(2.1-3.6)
4.0
(2.1-4.2)
6.0
(2.2-6.3)
7.1
(2.2-7.5)
6.8
(4.1-7.2)
7.4
(4.1-7.8)
9.3
(4.1-9.7)
9.3
(4.1-9.7)
8.0
(4.1-8.4)
9.3
(4.1-9.7)
9.3
(4.1-9.7)
9.3
(4.1-9.7)
9.3
(4.1-9.7)
9.3
(4.1-9.7)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
1.20
(0.91-1.28)
1.43
(0.91-1.51)
1.79
(0.94-1.88)
2.10
(0.94-2.21)
1.98
(1.13-2.18)
2.23
(1.13-2.33)
2.82
(1.13-2.96)
2.82
(1.13-2.96)
2.38
(1.13-2.54)
2.82
(1.13-2.96)
2.82
(1.13-2.96)
2.82
(1.13-2.96)
2.82
(1.13-2.96)
2.82
(1.13-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-3.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-3.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3.1
3.4
4.3
4.7
3.25
4.1
4.5
3.65
4.0
3.75
-
-
-
-
3.4
4.0
5.95
6.45
4.0
5.6
5.95
4.65
5.0
4.65
3.1
2.95
2.5
2.3
3.25
2.8
2.6
3.65
3.4
3.75
3.4
4.0
6.0
7.1
3.4
3.4
3.35
2.85
4.0
3.7
3.35
4.65
4.3
4.65
3.1
2.95
2.5
2.3
2.8
2.4
2.2
2.0
1.9
1.9
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

8
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
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
12.87
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
14.04
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
9.3
(5.2-10.6)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
2.78
(1.19-2.96)
-
-
-
-
-
-
-
-
2.32
2.7
3.3
3.6
2.5
3.3
3.7
2.95
3.3
2.4
3.2
3.6
2.9
2.32
3.15
3.45
2.8
3.1
4.0
4.4
3.5
3.8
3.65
3.1
3.58
2.32
2.2
2.0
1.9
2.5
2.2
2.1
2.95
2.8
2.4
2.15
2.0
2.9
2.32
2.05
1.95
2.8
3.1
2.65
2.45
3.5
3.3
3.65
3.1
2.86
2.32
2.2
2.0
1.9
2.15
1.9
1.75
1.7
1.6
2.4
2.15
2.0
1.9
2.32
2.05
1.95
1.85
3.1
2.65
2.45
2.3
2.2
2.0
3.1
2.86
2.32
2.2
2.0
1.9
2.15
1.9
1.75
1.7
1.6
2.1
1.8
1.7
1.6
2.32
2.05
1.95
1.85
09+09+09
09+09+12(13)
09+09+18
09+12(13)+12(13)
09+12(13)+18
09+18+18
12(13)+12(13)
+12(13)
12(13)+12(13)+18
07+07+07+07
07+07+07+09
07+07+07+12(13)
07+07+07+18
07+07+09+09
07+07+09+12(13)
07+07+09+18
07+07+12(13)
+12(13)
07+07+12(13)+18
07+09+09+09
07+09+09+12(13)
07+09+09+18
07+09+12(13)
+12(13)
09+09+09+09
09+09+09+12(13)
09+09+09+18
09+09+12(13)
+12(13)
NOTE: Electrical data is for outdoor unit only.

9
SPECIFICATION
5
TEST CONDITIONS COOLING INDOOR DB27.0°C WB19.0°C
OUTDOOR DB35.0°C WB24.0°C
HEATING INDOOR DB20.0°C
OUTDOOR DB 7.0°C WB 6.0°C
✽1 Electrical data is for only outdoor unit.
✽2 Current detection
Discharge temperature detection
High-pressure switch
Indoor units number
Piping total length
Connecting pipe length
Height difference (indoor ~ outdoor)
Height difference (indoor ~ indoor)
Cooling
Heating
Power supply
Mode
Power consumption
Running current
Power factor
Crankcase heater
Starting current
Compressor motor current
Fan motor current
External finish
Dimensions
Weight
Refrigerant filling capacity (R-22)
Refrigerating oil <Model>
In/Out connecting wire (Each room)
Refrigerant
piping
Protective
device
Compressor
Fan motor
Air flow amount change
Fan speed
Air flow
Power outlet
Thermistor
Model
m
m
m
m
kW
dB
kW
W
dB
W
A
%
W
A
A
A
mm
mm
mm
kg
kg
cc
mm
mm
W
"
W
"
rpm
K/h
A
Capacity
Sound level
Capacity
Booster heater
Sound level
Height
Width
Depth
Liquid pipe
Gas pipe
Connection method
Compressor
Fan motor
Model
Output
Winding resistance (at 20 :)
Model
Output
Winding resistance (at 20 :)
RT61 (at 25:)
RT62 (at 100:)
RT63 (at 70:)
RT64 (at 25:)
RT65 (at 25:)
RT66, 67 (at 25:)
Capacity System
Electrical data ✻ 1
Outdoor unit
2
Max. 30
Max. 20
Max. 7
Max. 7
4.5 (1.7 ~ 4.5)
45
5.8 (2.0 ~ 5.8)
-
46
Single phase, 220-240V, 50Hz
-
10.21
0.4
Munsell 5Y 7/1
650
875
295 (+30)
56
1.3
570cc <MS-56>
2-core, 1pc. [2.0mm
[9.52 (2pcs)
[6.35 (2pcs)
Flared
✻ 2
Inner thermostat
RHV-207FEM (Rotary)
1,100
1.195(U-V, V-W, W-U)
RA6V50 -
50
BLK-WHT 163, BLK-YLW 72, YLW-RED 36
2
630-670
2,460 - 2,580
25
10.0k"
13.4k"
7.9k"
10.0k"
10.0k"
10.0k"
MXZ-18NV- E1 MXZ-18NV- E2
Cooling
2,000 (855~2000)
10.21(5.28 - 10.21) - 9.26(4.83 - 9.26)
89 - 90
9.74(4.87 - 9.74) - 8.86(4.43 - 8.86)
Heating
1,785 (690~1785)
9.02(6.38 - 9.02) - 8.26(5.83 - 8.26)
90 - 90
8.62(5.98 - 8.62) - 7.86(5.43 - 7.86)

10
Indoor units number
Piping total length
Connecting pipe length
Height difference (indoor ~ outdoor)
Height difference (indoor ~ indoor)
Cooling
Heating
Power supply
Mode
Power consumption
Running current
Power factor
Crankcase heater
Starting current
Compressor motor current
Fan motor current
External finish
Dimensions
Weight
Refrigerant filling capacity (R-22)
Refrigerating oil <Model>
In/Out connecting wire (Each room)
Refrigerant
piping
Protective
device
Compressor
Fan motor
Air flow amount change
Fan speed
Air flow
Power outlet
Thermistor
Model
m
m
m
m
kW
dB
kW
W
dB
W
A
%
W
A
A
A
mm
mm
mm
kg
kg
cc
mm
mm
W
"
W
"
rpm
K/h
A
Capacity
Sound level
Capacity
Booster heater
Sound level
Height
Width
Depth
Liquid pipe
Gas pipe
Connection method
Compressor
Fan motor
Model
Output
Winding resistance (at 20 :)
Model
Output
Winding resistance (at 20 :)
RT61 (at 100:)
RT62 (at 25:)
RT63 (at 50:)
RT64 (at 25:)
RT65 (at 25:)
RT70,66, 67,68,69 (at 25:)
Capacity System
Electrical data ✻ 1
Outdoor unit
3-4
Max. 60
Max. 25
Max. 10
Max. 10
8.0 (1.8 ~ 9.0)
45-47
9.3 (2.1 ~ 10.6)
-
46-48
Single phase, 220-240V, 50Hz
16.31(4.85 - 20.00) - 14.95(4.44 - 18.33)
90
25
16.31 - 14.95
0.4
Munsell 5Y 8/1
900
900
320 (+35)
83.5
4.2
1070cc <MS-32>
2-core, 1pc. [2.0mm
[12.7 (2pcs) [9.52 (2pcs)
[6.35 (4pcs)
Flared
✻ 2
Inner thermostat
CHV253FAA (Scroal)
2,000
0.54(U-V, V-W, W-U)
RA6V60-
60
BLK-WHT 79.0, BLK-YLW 27.0, YLW-BLU 12.0 BLU-RED 84.0
3
630 - 680 / 525 - 570 / 460 - 500
3000 / 2400 / 2100
25
13.4k"
10.0k"
17.0k"
10.0k"
10.0k"
10.0k"
Cooling
3,230 (960~3,960)
15.71(4.25 - 19.40) - 14.35(3.84 - 17.73)
Heating
2,780 (910~2,960)
13.44(4.00 - 14.35) - 12.27(3.62 - 13.10)
MXZ-32NV- E1 MXZ-32NV- E2
TEST CONDITIONS COOLING INDOOR DB27.0°C WB19.0°C
OUTDOOR DB35.0°C WB24.0°C
HEATING INDOOR DB20.0°C
OUTDOOR DB 7.0°C WB 6.0°C
✽1 Electrical data is for only outdoor unit. ✽2 Current detection
Discharge temperature detection
High-pressure switch
Crankcase heater
Low-pressure switch
Inner thermostat

11
6 OUTLINES AND DIMENSIONS
Necessary surrounding clearance
Necessary surrounding clear- ance for concentrated installa- tion. Leave overhead clearance fully
100
Handle for monving
200
1000
2957
23
Max. 25
Base bolt length
To drain water in a mass, use optional drain pan and drain socket. Drain pan : PAC-928DP,PAC-SA44DP Drain socket : PAC-SA46DS
Drain hole
Drain hole
(Base bolt M10)
(Base bolt M10)
2 Oval hols (12 13)
2-U-Shape noched hols
33
524
339
302
524
77
2
25
12
17
R6
40 116
A B
57
107 57
57
505
30 870
650
10 Max. 10 units
Air in
Air in
Air out
185 185500
362
10
10
500
500
100
500
10
200
330
39.5 27.5 1715
Leave front clearance fully
Space for servicing
Leave overhead clearance fully
Rear piping hole
Rear air-intake
Side air-intake
Handle for moving
Handle for moving
Liquid pipe
(flared 6.35)
Ground terminal
Outlet guide mounting hole
Gas pipe
(flared 9.52)
MXZ-18NV -MXZ-18NV -E2E1
Unit:mm

12
MXZ-32NV -MXZ-32NV -E2E1 Unit:mm
1.Installation space
2.Service space
More than 100
More than
200
More than
100
More than
500
More than
500
More than
10
More than
10
More than
500
Base bollt length
Less than
25
More than 350
More than 350
Service space
Air in
2-U-shape notched holes
(Base bolt M10)
(Base bolt M10)
Air in
Air out
200 200
387
355
27 40
(16) (16)
500
Veranda Base
Rubber cushion
More than
500
Note : Leave front and both sides clearance fully. Note : Leave front and overhead
clearance fully. Note : Leave front, overhead and
both clearance fully.
2-12 ✕ 36 Oval hole
23
10 35320 900
88
460
50
900
350.0
480.8
531.3
317 23
33
Handle for moving
Air in
Indoor and outdoor connect wiring
Air in 23✕45 hole
D unit connection C unit connection B unit connection A unit connection
6.35 (flared) 1/4 Liquid pipe
12.7 (flared) 1/2 (A , B unit) 9.52 (flared) 3/8 (C , D unit)
[
[
[

13
WIRING DIAGRAM
7
NOTE:1. For the outdoor electric wining refer to the outdoor unit electric wining diagram for servicing.
2. Use copper conductors only.(For field wining)
3. Symbols below indicate.
: Terminal block, : Connector
4. “ ✻”shows the terminals with a lock mechanism,so they cannnot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever (project part) of the terminal with a finger.
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
CIRCUIT BREAKER
DC24V
DC24V
TB
TO
INDOOR
UNIT
CONNECTING
DS61
NF61
INDOOR
UNIT (A)
POWER SUPPLY
220-240V
~/N
50Hz
INDOOR
UNIT (B)
TB
NF62
C61
C64
C63 L61
R64
X64
CT61
NR61
AR61
RELAY P.C.BOARD
N
3
N
3
L
N
LDE1
LD62
F62
3
4
1
2
LD77
LD74
LD73LD71
LD72
3
4
2
1
TB62
TB61
LD61
34
LD63
CN941
BRN
GRN/YLW
BLU
RED
BLU
BLU
RED
BLU
BLU
BLU RED
BLK
WHT
WHT
GRN
BLU
BRN
BLK
YLW
BRN
RED
YLW
YLW
BLU
RED
BRN
RED
T801
C67
LEV A LEV B
1
2
3
4FUSE1
CN801
CN761
CN601 CN611
TBAC1 TBAC2
BLU
ORN YLW
WHT RED
BLK BLK
WHT
BLU
BLK
ORN
RED BLK BLU
BLU
ORN YLW
WHT RED
RT64 RT65
SSR61
RT66 RT67 RT61RT62 RT63
6
554321543216
321
2
3
4
1
CN682CN771
BLK BLK
R65
W
V
UP
NEwN
BwN
EvN
BvN
EuN
BuN
BwPBvPBuP
BLU
RED
RED
WHT
BLK
RED
WHT
BLK
21S4
RED
RED
X67
X60
HPS
CN683
CN63
CN701
CN671CN641CN681CN661
BLK WHT
ORN
GRY GRY GRY GRY
BLK BLK
GRY GRY GRY GRY GRY GRY
RED RED
GRN YLW
RED BLU
YLW
RED
BRN
RED
ORN
YLW
GRN
BLU
LMF
MC
V
WU
WHT WHT
C65
ELECTRONIC CONTROL
P.C.BOARD
12 12 2 4321 8
7
6
5
11
FUSE2
TAB91
CN731
CN621
LD64
BLK
+-
~
+
-
~
DS63
TR
6
123412 12
2
3
4
1
4
3
2
1
2345
1234 1234
3
2
1
CN61
EwPEvPEuP
RED
RED
BLU
GRN YLW ORN
RED
BRN
+
~
~
~
-
+
-❈
❈❈ ❈❈
❈❈ ❈
❈❈
❈❈
❈❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈
❈❈
❈
❈
❈
❈
R64
R65 CURRENT-DETECTING RESISTOR
CURRENT-LIMITING RESISTOR
T801 TRANSFORMER
FUSE2
FUSE(3.15A)
FUSE1 FUSE(1A)
F62
FUSE(3.15A)
SYMBOL NAME
GAS PIPE TEMPERATUREA.THERMISTOR
RT65
GAS PIPE TEMPERATUREB.THERMISTOR
RT64
DEFROST TEMPERATURETHERMISTOR
DISCHARGE TEMPERATURETHERMISTOR
FIN TEMPERATURETHERMISTOR
EVAPORATION TEMPERATURETHERMISTOR
SUCTION TEMPERATURETHERMISTOR
OUTDOOR FAN MOTOR(INNER THERMOSTAT)
RT61
RT62
RT63
RT66
RT67
21S4 R.V.COIL
TB TERMINAL BLOCK
FAN MOTOR RELAY
TR POWER TRANSISTOR MODULE
X60,67
X64 RELAY
SSR61 SOLID STATE RELAY
SYMBOL
SURGE ABSORBER
POWER-FACTOR CAPACITOR
SMOOTHING CAPACITOR
OUTDOOR FAN CAPACITOR
CERAMIC CAPACITOR
CERAMIC CAPACITOR
AR61
C61
C67
C65
C63
C64
NAME SYMBOL NAME
MC
MF
NR61
LEV A,B
DS61,63
L
L61
HPS
CT61
COMPRESSOR
CURRENT TRANSFORMER VARISTOR
REACTOR
DIODE MODULE
HIGH PRESSURE SWITCH
EXPANSION VALVE
CMC COIL
NF61,62 NOISE FILTER
MODELS MXZ-18NV- MXZ-18NV- E2E1

14
POWER SUPPLY
~/N 220-240V 50Hz
INDOOR
UNIT (A) 12VDC
CIRCUIT BRAKER
TB2
TB3 BLU
RED
TB4
X64
GRN/YLW
GRN/YLW
CN720
CN601
0
4
X64
LD62
CN913
CN791
CN901
64
2
CN902
CN851 CN852
MF61
CH
21S4 21S2
12 12
21
21
12
12
34
123456
1234567
123456
CN912 C65
LD63
LD64 LDB
LDB
LD61
LDE
L61
F911
SSR61 SSR62 SSR63
X63 X62 X61
1
6
L
N
3
N
INDOOR
UNIT (B) 12VDC BLU
ORN
CN602
12
3
3
3
N
INDOOR
UNIT (C) 12VDC BLU
YLW
CN603
12
N
INDOOR
UNIT (D) 12VDC BLU
BEN
CN604
12
N
BLK
BRN GRY
BLK
BLK WHT
YLW
RED
RED
RED BRN BLU ORN YLW WHT
ORN WHT BLK BLU YLW
RED BLU
BLU
WHT
WHT
ORN ORN RED RED
YLW
YLW
YLW
BLK
BLK
ORN
ORN
BRN
GRY
X65
X66 X67
X67
63H2
X65
X66 CN552
CN553
BLK
RELAY
P.C. BOARD
WHT WHT
RED WHT
V
UW
YLW
AKL
WHT
NOISE FILTER
P.C.BOARD
RED DS61 DS62
C61
CT
61
C63 C62
++
-
+
-
+
-
-
BLKREDR
BLU
LEV A
CN792
123456
RED BRN BLU ORN YLW WHT
LEV B
CN793
123456
RED BRN BLU ORN YLW WHT
LEV C
CN794 CN722 CN663
63H1 RT63
123456 CN662 1234567812 12
123
34
RED RED RED
63L
BLK BLK BLK BLK
RT66 RT68
RT67 RT69
GRY GRY GRY GRY GRY GRY GRY GRY
CN661
CN705
7654321
CN515
1234
4321
CN801
CN501
TAB62 TAB63
T801
CT62
TAB66
TAB65
TAB64
I.P.M P.C. BOARD
F801
(1A)
CN704
CN514
CN554CN551
CN723
12345678
RT62 RT64
RT61 RT65
GRY GRY BLK BLK GRY GRY GRY GRY BRN BLU ORN YLW WHT
LEV D
ELECTRONIC CONTROL P.C. BOARD
MC
MODELS MXZ-32NV- MXZ-32NV- E2E1
SYMBOL
C61
C62,63
C65
CH
CT61,62
DS61
DS62
F801
F911
L
L61
LEV A~D
R
RT61
RT62
RT63
RT64
SYMBOL
RT65
RT66,67
RT68,69
MC
MF61
SSR61,62
SSR63
T801
TB2,3,4
X61,62,63
X64,65
X66,67
21S2
21S4
63H1
63H2
63L
NAME
POWER FACTOR CAPACITOR
SMOOTHING CAPACITOR
OUTDOOR FAN CAPACITOR
CRANKCASE HEATER
CURRENT TRANSFORMER
DIODE MODULE
DIODE STACK
FUSE (1A)
FUSE (1A)
REACTOR
COMMON MODE CHOKE COIL
EXPANSION VALVE
RESISTOR
DISCHARGE TEMPERATURE THERMISTOR
DEFROST TEMPERATURE THERMISTOR
FIN TEMPERATURE THERMISTOR
EVAPORATION TEMPERATURE THERMISTOR
NAME
SUCTION TEMPERATURE THERMISTOR
GUS PIPE TEMPERATURE THERMISTOR
GUS PIPE TEMPERATURE THERMISTOR
COMPRESSOR
OUTDOOR FAN MOTOR (INNER FUSE)
SOLENOID COIL RELAY
CRANKCASE HEATER RELAY
TRANSFORMER
TERMINAL BLOCK
FAN MOTOR RELAY
RELAY
RELAY
SOLENOID COIL
R.V. COIL
HIGH PRESSURE SWITCH
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
NOTE:1. “- - - - “ denotes the wiring at the site.
2 “❈”show the terminals with a lock mechanism, so they cannot be removed
when you pull the lead wire.
Be sure to pull the wire by pushing the locking lever(projected part) of the
terminal with a finger.
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
OUTDOOR UNIT
GROUND
Power supply cord
Terminal block
POWER SUPPLY
~/N 220-240V 50Hz
Indoor/outdoor connecting wire
Make all connections
as shown below.
DUNIT
AUNIT
DUNIT
3
CUNIT CUNIT
3
BUNIT
BUNIT
3
AUNIT 3
N
N
N
N
N
L
3
2
N
L
INDOOR UNIT
INDOOR AND OUTDOOR ELECTRICAL WIRING CONNECTION FIGURE

15
REFRIGERANT SYSTEM DIAGRAM8
9.52
6.35
9.52
9.52
2.0X 0.6X500
Charge port
Capillary
tube
4.0X
2.4X
400
Capillary
tube
4.0X
2.4X
300
Expansion
valve(LEV)
Expansion
valve(LEV)
Strainer
Strainer
Capillary
tube
4.0X
2.4X
300 Ball valve with
service port
Ball valve
Service
port
(high pressure) Reversing
valve
Suction temperature
thermistor
RT66
Gas pipe
thermistor
Gas pipe
thermistor
Muffler
Compressor
High pressure
switch
Discharge
temperature
thermistor
RT62
Service
port
(Low pressure)
Refrigerant flow in cooling
Refrigerant flow in heating
R.V. coil
heating ON
cooling OFF
Strainer
Capillary
tube
Evaporation
temperature
thermistor
RT67
Defrost
thermistor
RT61
Outdoor
heat
exchanger
6.35
Indoor unit
B
Indoor unit
A
Indoor unit
A
Indoor unit
B
Unit:mm
MXZ-32NV -MXZ-32NV -E2E1
8.1 REFRIGERANT SYSTEM DIAGRAM
MXZ-18NV -MXZ-18NV -E2E1
Indoor unit
DBall valve with
service port
Ball valve with
service port
Distributor
Strainer StrainerLEV
Oil
separator
Compressor
High pressure
switch 1
Suction
temperature
thermistor
Low pressure switch
Accumlator
Capillary tube
Capillary tube
Capillary tube
Reversing valve 2-way-valve
Discharge
temperature
thermistor
Evaportation
temperature
thermistor
(RT67)
Defrost
thermistor
Strainer Distributor
Outdoor
heat
exchanger
High pressure
switch 2
Unit D gas pipe temperature thermistor
[9.52
Indoor unit
C
Unit C gas pipe temperature thermistor
[9.52
[6
Indoor unit
B
Unit B gas pipe temperature
thermistor [12
Indoor unit
A
Indoor unit
A
Strainer StrainerLEV [6
Indoor unit
B
Strainer StrainerLEV [6
Indoor unit
C
Strainer StrainerLEV [6
Indoor unit
D
Unit A gas pipe
temperature thermistor
[12
[16
[16
[9.52
[16
[3.0✕[2.0✕500
Capillary tube
[2.5✕[0.6✕750
[2.5✕[0.6✕1000
[3.0✕[2.0✕500
Capillary tube
[4.0✕[2.4✕400
Refrigerant flow in cooling
Refrigerant flow in heating
R.V. coil
heating ON
cooling OFF

16
MXZ-32NV -MXZ-32NV -E2E1
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 15
Total bending point 30
❋It does not matter which unit is higher.
a
b
c
d
Outdoor
unit
Indoor
units
H
H
H
8.2 MAX REFRIGERANT PIPING LENGTH
MXZ-18NV -MXZ-18NV -E2E1
Piping length for each indoor unit (a,b) 20m
Total piping length (a+b) 30m
Height difference between units (H) 7m
Bending point for each unit 15
Total bending point 30
❈It does not matter which unit is higher
a
b
Outodoor
unit H
H
H

17
●Refrigerant pipe diameter is different according to indoor unit to be connected. When using extention pipes,refer to the tables
below.
●When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. For further
information on Different-diameter pipe,see page 62.
Indoor unit
Extention pipe diameter
class Pipe diameter
Liquid 6.35(1/4) Liquid 6.35(1/4)
07/09 Gas 9.52(3/8) Gas 9.52(3/8)
Liquid 6.35(1/4) Liquid 6.35(1/4)
12(13) Gas 12.7(1/2) Gas 12.7(1/2)
Liquid 6.35(1/4) Liquid 6.35(1/4)
18 Gas 15.88(5/8) Gas 15.88(5/8)
Outdoor unit union diameter
For Liquid 6.35(1/4)
Indoor unit A Gas 12.7(1/2)
Liquid 6.35(1/4)
Indoor unit B Gas 12.7(1/2)
Liquid 6.35(1/4)
Indoor unit C Gas 9.52(3/8)
Liquid 6.35(1/4)
Indoor unit D Gas 9.52(3/8)
Unit : mm (inch)
8.3 PIPE SIZE SELECTION
MXZ-18NV -MXZ-18NV -E2E1
●Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the
table below.
●When diameter of refrigerant pipe is different from that of outdoor unit union, use optional L-joint. For further information on
L-joint, see page 62.
Indoor unit
Extention pipe diameter
class Pipe diameter
Liquid 6.35(1/4) Liquid 6.35(1/4)
07/09 Gas 9.52(3/8) Gas 9.52(3/8)
Liquid 6.35(1/4) Liquid 6.35(1/4)
12 Gas 12.7(1/2) Gas 12.7(1/2)
Outdoor unit union diameter
For Liquid 6.35(1/4)
Indoor unit A Gas 9.52(3/8)
Liquid 6.35(1/4)
Indoor unit B Gas 9.52(3/8)
Unit : mm (inch)
MXZ-32NV -MXZ-32NV -E2E1

18
8.4 EVACUATION PROCEDURES
MXZ-18NV -MXZ-18NV -E2E1
CAUTION : If you run this unit with air in its refrigerant pipe before air purge, the compressor will decline in cooling
capacity, which may result in trouble.
❶. Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor and the uotdoor units.
❷. Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe.[ The stop valve
will not work in its initial atate fresh out of the factory (totally closed with cap on).]
❸. Connect the gauge manifold valve and the vacuum pump to the service port of the stop valve on the side
of the outdoor unit gas pipe.
❹. Run the vacuum pump.
❺. Check the vacuum with the gauge manifold valve, then close the gauge manifold valve, and stop the
vacuum pump.
❻. Leave it as is for one or two minutes.Make sure the pointer of the gauge manifold valve remains in the
same position.
❼. Remove the cape from the stop valves of the outdoor unit, liquid pipe, and gas pipe. Pull the handle
towards you with a finger. Turn it one fourth turn counterclockwise, to obtain the full-open position.
❽. Remove the cape manifold valve quickly from the service port of the stop valve.
❾. Tishten the cap to the service port to obtain the initial status.
❿. Thrust the handle of the stop valve into the unit, then retighten the cap.
Leak test ....... With a gas detector or soap water, check the flared nut connections for any refrigerant leak.
●Retighten the flared nut connections.
●If the leak does not stop even after retightening, repair the leaking point, collect all from inside the unit
through the service port, apply a vacuum to it, then charge a specified amount of gas with a gas cylinder.
Gauge manifold valve
Connect pipes
Vacuum pump
Service port
In case of a refrigerant leak

19
❶.Make sure the pipes are connected securely.
❷.Connect the projected side (on which the setting pin is pressed) of the gauge manifold valve´s charge hose to the
stop valve´s service port (gas pipe side).
❸.Make sure the stop valves of gas and liquid pipes are fully closed, and connect the charge house to the vacuum
pump.
❹.Fully open the manifold valve´s valve knob Lo and operate the vacuum pump.
Loosen the stop valve flare nut on the gas pipe side a little bit and make sure that air is entering.
Then tighten the flare nut not to enter the air. After that, make sure that the charge hose is connected firmly to
the service port.
❺.Purge air for more than 15 minutes, and make sure the compound gauge is reading - 1.01 ✕105Pa (-760mmHg).
❻.After purging air, fully close the manifold valve´s valve knob Lo and stop operating the vacuum pump.
❼.Leave the situation for about 1 to 2 minutes, make sure the needle of the compound gauge does not return, pull the
stop valve´s knob toward you, and fully open the stop valve by turning it a quarter turn counterclockwise.
❽.Quickly remove the gauge manifold valve´s charge hose from the stop valve´s service port.
❾.Tighten the service port cap 1/12 turn more from where the tightening torque is suddenly increased.
(It is equivalent to a tightening torque of 13.7 to 17.7N-m (140 to 180kgf-cm).)
❿. Tighten the service port cap 1/12 turn more from where the tightening torque is suddenly increased.
(It is equivalent to a tightening torque of 19.6 to 29.4N-m (200 to 300kgf-cm).)
Stop valve
(gas side)
Service port
Valve knob Lo Valve knob Hi
Charge hose
Vacuum
pump
Gauge
Manifold
Compound gauge Pressure gauge
-1.01✕10 Pa
(-760mmHg)
MXZ-32NV -MXZ-32NV -
●For details about how to use manifold valves, see the instruction manual for manifold valves.
●The valve knob Hi below cannot operate during the following work if it is fully closed.
E2E1
Warning :When installing or moving the unit, do not mix anything other than specified refrigerant (R-22) into the
refrigerating cycle.
If air is mixed, it may cause the refrigerating cycle to get abnormally high temperature, causing a risk of
burst.
Leak test ....... With a gas detector or soap water, check the flared nut connections for any refrigerant leak.
●Retighten the flared nut connections.
●If the leak does not stop even after retightening, repair the leaking point, collect all from inside the unit
through the service port, apply a vacuum to it, then charge a specified amount of gas with a gas cylinder.
In case of a refrigerant leak

20
PERFORMANCE CURVES
The standard data contained in these specifications apply only to the operation of the air conditioner, that is one indoor unit
with one outdoor unit, 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
Rated voltage : ±10% (198 ~ 264V 50Hz )
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °CWB
(2) Indoor discharge air wet-bulb temperature : °CWB
(3) Outdoor intake air dry-bulb temperature : °CDB
(4) Total input: W
(5) Indoor intake air dry-bulb temperature : °CDB
(6) Outdoor intake air wet-bulb temperature : °CWB
(7) Total input : W
Indoor air wet-bulb temperature difference on the left side of the chart on next page shows the difference between the
indoor intake air wet-bulb temperature and the indoor discharge air wet-bulb temperature for your reference at service.
How to measure the indoor air wet-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 if the air filter is cleaned.
4. Open windows and doors of room.
5. Press the EMERGENCY ON/OFF button to start the EMERGENCY operation.
6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
7. Ten minutes later, measure temperature again and check that the temperature does not change.
9
INDOOR UNIT OUTDOOR UNIT
}
}
Cooling
Heating