Revision C:
• MXZ-4A36NA have been added.
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
OUTDOOR UNIT
SERVICE MANUAL
Inverter-controlled multi system type
Models
MXZ-2A20NA
MXZ-2A20NA -
1
MXZ-3A30NA
Please void OB444 REVISED EDITION-B.
HFC
utilized
R410A
No. OB444
REVISED EDITION-C
MXZ-3A30NA MXZ-4A36NA
MXZ-2A20NA
MXZ-2A20NA -
1
1
Indoor unit service manual
MSZ-A·NA Series (OB450)
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR UNIT OPERATIONAL CHARACTERISTICS····7
4. SPECIFICATION···············································18
5. OUTLINES AND DIMENSIONS·······················21
6. WIRING DIAGRAM ··········································25
7. REFRIGERANT SYSTEM DIAGRAM··············30
8. DATA·································································36
9. ACTUA TOR CONTROL····································52
10. SERVICE FUNCTIONS·····································52
11. TROUBLESHOOTING ······································54
12. DISASSEMBLY INSTRUCTIONS·····················71
13. PARTS LIST······················································80
14. RoHS PARTS LIST···········································88
15. OPTIONAL PARTS ·········································100
NOTE:
• This service manual describes technical
data of the outdoor units.
• RoHS compliant products have <G> mark
on the spec name plate.
For servicing of RoHS compliant products,
refer to the RoHS Parts List.
9700058
The Slim Line.
From Mitsubishi Electric.
TM
33223
Revision A:
• RoHS PARTS LIST has been added.
Revision B:
• MXZ-2A20NA - and MXZ-3A30NA - have been added.
11
Revision C:
• MXZ-4A36NA has been added.
1
TECHNICAL CHANGES
MXZ-2A20NA
New model
MXZ-30TN2 ➔ MXZ-3A30NA
1. Combinations of connectable indoor units have been increased.
2. Capacity class of connectable indoor units have been made larger.
3. Compressor has been changed. (THV247FBA ➔ TNB220FMCH)
4. Outdoor fan motor has been changed. (RA6N60-AA ➔ RC0J60-AB)
5. Refrigerant has been changed. (R22 ➔ R410A)
6. Refrigerant system diagram has been changed.
• 1 of 2 high pressure switch has been removed.
• Accumulator has been removed.
• Receiver has been added.
7. Communication system has been changed.
8. Power supply way has been changed(change to supply to outdoor unit).
9. Evaporation temperature thermistor has been added.
10. Ambient temperature thermistor has been added.
MXZ-2A20NA ➔ MXZ-2A20NA -
1. Compressor has been changed. (SNB130FPDH1 ➔ SNB130FQBH1)
2. Gas pipe temperature thermistor has been removed.
3. Pre-heat control has been added.
4. Electronic control P.C. board has been changed.
5. Power board has been changed.
MXZ-3A30NA ➔ MXZ-3A30NA -
1. Ball valve has been changed to stop valve.
2. Gas pipe temperature thermistor has been removed.
3. Pre-heat control has been added.
4. Auto line correcting function has been added.
5. Noise filter P.C. board has been changed.
6. Electronic control P.C. board has been changed.
7. Weight has been changed. (158lb. ➔ 148lb.)
1
1
MXZ-4A36NA
New model
2
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
Refrigeration
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-60.5
225.82
3.995
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-41.4
136.34
2.772
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (-F)
Steam pressure [77-F](PSIG)
Saturated steam density [77-F](lb/ft
3
)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Depletion Potential : based on CFC-11
w2 :Global Warming Potential : based on CO
2
• This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer.
• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 air
conditioners.
1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/
materials are required. Refer to the table below.
2 Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and
installation, since it is more susceptible to contaminations than R22.
3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
3
R410A tools Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges.
Hose material has been changed to improve the pressure resistance.
Dedicated for HFC refrigerant.
1/4in. and 3/8in.
Description
Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).
Provided to prevent the back flow of oil. This adapter enables you to use
vacuum pumps.
It is difficult to measure R410A with a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization.
No
No
No
Yes
Yes
New
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
No : Not Substitutable for R410A Yes : Substitutable for R410A
No 1/2in. and 5/8in.
1.Tools dedicated for the air conditioner with R410A refrigerant
New Specification Current Specification
The incompatible refrigeration oil easily separates from
refrigerant and is in the upper layer inside the suction muffler.
Raising position of the oil back hole enables to back the
refrigeration oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigeration oil are compatible,
refrigeration oil goes back to the compressor through the
lower position oil back hole.
Compressor
Suction muffler
Oil back hole
Refrigeration oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigeration oil /Refrigerant
Compressor
-22 -4 14 32 50 68
86
104 122 140
-73
0
73
145
218
290
363
435
508
580
(PSIG)
R410A
R22
Conversion chart of refrigerant temperature and pressure
Saturated liquid pressure
(-F)
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
4
2.Refrigerant piping
Wall thickness
(inch)
Outside diameter
(inch)
1/4
3/8
1/2
5/8
0.0315
0.0315
0.0315
0.0394
Heat resisting foam plastic
Specific gravity 0.045 Thickness 0.315 inch
Insulation material
Electronic scale for refrigerant charging
Outdoor unit
Refrigerant gas
cylinder
operating valve
Refrigerant gas cylinder
for R410A with siphon
Refrigerant (liquid)
Service port
Gauge manifold
valve (for R410A)
Union
Liquid pipe
Gas pipe
Stop valve
Indoor unit
Charge hose (for R410A)
1 Specifications
Use the copper or copper-alloy seamless pipes for refrigerant that meet the following specifications.
2 Flaring work and flare nut
Flaring work for R410A pipe differs from that for R22 pipe.
For details of flaring work, refer to installation manual “FLARING WORK”.
Pipe diameter
(inch)
1/4
3/8
1/2
5/8
17 [11/16]
26 [1-1/32]
29 [1-5/32]
Dimension of flare nut
(mm) [inch]
R410A
22 [7/8]
R22
17 [11/16]
22 [7/8]
24 [15/16]
27 [1-1/16]
3.Refrigeration oil
Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.
4.Air purge
• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant
circuit.
• Use the vacuum pump for air purging for the purpose of environmental protection.
5.Additional charge
For additional charging, charge the refrigerant from liquid phase of the gas cylinder.
If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the
outdoor unit. In this case, ability of the refrigeration cycle decreases or normal operation can be impossible. However,
charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.
5
MXZ-3A30NA
Air inlet
Drain outlet
(Back and side)
Air outlet
Air inlet
Drain outlet
(Back and side)
Air outlet
MXZ-3A30NA - MXZ-4A36NA
1
Air inlet
(Back and side)
Air outlet
Drain outlet
6
1
09
12
15
09+09
09+12
09+15
12+12
95
95
95
97
97
97
97
3.34
4.53
7.05
7.80
9.64
9.64
9.64
3.69
5.01
7.79
8.62
10.66
10.66
10.66
–
–
–
9,000
11,500
12,500
10,000
9,000
(5,400 ~ 9,000)
12,000
(5,400 ~ 12,000)
15,000
(5,400 ~ 15,000)
18,000
(7,800 ~ 18,000)
20,000
(7,800 ~ 20,000)
20,000
(7,800 ~ 20,000)
20,000
(7,800 ~ 20,000)
730
(490 ~ 730)
990
( 490 ~ 990)
1,540
(490 ~ 1,540)
1,740
(630 ~ 1,740)
2,150
(630 ~ 2,150)
2,150
(630 ~ 2,150)
2,150
(630 ~ 2,150)
9,000
12,000
15,000
9,000
8,500
7,500
10,000
Indoor units
combination
Unit A Unit B
Cooling capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V 230V
MXZ-2A20NA MXZ-2A20NA -
09
12
15
09+09
09+12
09+15
12+12
95
95
95
97
97
97
97
4.30
5.40
7.87
8.16
7.98
7.98
7.98
4.76
5.97
8.70
9.02
8.82
8.82
8.82
–
–
–
10,900
12,500
13,750
11,000
10,900
(5,200 ~ 15,400)
13,600
(5,200 ~ 16,400)
18,000
(5,200 ~ 21,100)
21,800
(8,500 ~ 21,800)
22,000
(8,500 ~ 22,000)
22,000
(8,500 ~ 22,000)
22,000
(8,500 ~ 22,000)
940
(480 ~ 1,430)
1,180
(480 ~1,460)
1,720
(480 ~ 2,100)
1,820
(520 ~ 1,820)
1,780
(520 ~ 1,780)
1,780
(520 ~ 1,780)
1,780
(520 ~ 1,780)
10,900
13,600
18,000
10,900
9,500
8,250
11,000
Indoor units
combination
Heating capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V 230V
Unit A Unit B
3
The following charts show indoor unit performance when operating individually or in combination. For authorized system
configurations of the indoor units, please refer to the Mr. Slim brochure.
INDOOR UNIT OPERATIONAL CHARACTERISTICS
7
1
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
3.66
4.58
6.04
6.77
10.07
8.07
8.96
11.21
12.10
14.34
11.21
12.55
12.55
12.55
12.55
12.55
12.82
14.57
14.57
14.57
4.05
5.06
6.68
7.49
11.13
8.92
9.91
12.39
13.38
15.86
12.39
13.88
13.88
13.88
13.88
13.88
14.18
16.11
16.11
16.11
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9,000
11,400
12,900
13,800
9,000
(7,200 ~ 9,000)
12,000
(7,200 ~ 12,000)
15,000
(7,200 ~ 15,000)
16,200
(7,200 ~ 16,200)
22,000
(7,200 ~ 22,000)
18,000
(12,000 ~ 18,000)
21,000
(12,000 ~ 21,000)
24,000
(12,000 ~ 24,000)
25,200
(12,000 ~ 25,200)
28,000
(12,000 ~ 28,000)
24,000
(12,000 ~ 24,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
27,000
(12,600 ~ 27,000)
28,400
(12,600 ~ 28,400)
28,400
(12,600 ~ 28,400)
28,400
(12,600 ~ 28,400)
–
–
–
–
–
9,000
12,000
15,000
16,200
20,400
12,000
14,500
15,200
13,000
13,800
13,000
9,000
8,500
7,750
7,300
9,000
12,000
15,000
16,200
22,000
9,000
9,000
9,000
9,000
7,600
12,000
11,500
10,800
13,000
12,200
13,000
9,000
8,500
7,750
7,300
Indoor units
combination
Unit A Unit B Unit C
Cooling capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V 230V
MXZ-3A30NA MXZ-3A30NA -
800
(650 ~ 800)
1,000
(650 ~ 1,000)
1,320
(650 ~ 1,320)
1,480
(650 ~ 1,480)
2,220
(650 ~ 2,200)
1,800
(920 ~ 1,800)
2,000
(920 ~ 2,000)
2,500
(920 ~ 2,500)
2,700
(920 ~ 2,700)
3,200
(920 ~ 3,200)
2,500
(920 ~ 2,500)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,860
(1,000 ~ 2,850)
3,250
(1,000 ~ 3,250)
3,250
(1,000 ~ 3,250)
3,250
(1,000 ~ 3,250)
8
Indoor units
combination
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
Heating capacity (BTU/h)
Unit A Unit B Unit C
10,900
13,600
18,000
20,100
23,200
10,900
10,900
10,100
9,300
7,300
13,500
12,000
11,200
13,500
12,700
13,500
9,500
8,600
7,800
7,350
–
–
–
–
–
10,900
13,600
16,900
17,700
19,700
13,500
15,000
15,800
13,500
14,300
13,500
9,500
8,600
7,800
7,350
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9,500
11,400
13,000
13,900
Total
10,900
(8,600 ~ 15,400)
13,600
(8,600 ~ 16,400)
18,000
(8,600 ~ 21,100)
20,100
(8,600 ~ 21,500)
23,200
(8,600 ~ 27,800)
21,800
(11,000 ~ 31,000)
24,500
(11,000 ~ 33,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
28,500
(11,400 ~ 36,000)
28,600
(11,400 ~ 36,000)
28,600
(11,400 ~ 36,000)
28,600
(11,400 ~ 36,000)
Power consumption
(W)
1,100
(780 ~1,520)
1,380
(780 ~ 1,600)
1,940
(780 ~ 2,280)
2,240
(780 ~ 2,300)
2,520
(780 ~ 3,000)
1,700
(740 ~2,560)
1,980
(740 ~ 2,800)
2,200
(740 ~ 2,920)
2,200
(740 ~ 2,920)
1,980
(740 ~ 2,740)
2,200
(740 ~ 2,920)
2,160
(740 ~ 2,860)
2,140
(740 ~ 2,860)
2,120
(740 ~ 2,800)
2,110
(740 ~ 2,800)
2,100
(740 ~ 2,800)
2,180
(740 ~ 2,880)
2,180
(740 ~ 2,880)
2,180
(740 ~ 2,880)
2,180
(740 ~ 2,880)
Current
(A)
208V 230V
5.57
6.98
9.82
11.34
12.75
8.43
9.81
10.90
10.90
9.81
10.90
10.71
10.61
10.51
10.46
10.41
10.80
10.80
10.80
10.80
5.03
6.32
8.88
10.25
11.53
7.62
8.87
9.86
9.86
8.87
9.86
9.68
9.59
9.50
9.46
9.41
9.77
9.77
9.77
9.77
Power
factor
(%)
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
9
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
09+09+24
09+12+12
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
4.05
5.06
6.68
7.49
11.13
8.92
9.91
12.39
13.38
15.86
12.39
13.88
13.88
13.88
13.88
13.88
14.18
16.21
17.35
17.35
17.35
17.35
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9,000
12,000
14,500
15,700
18,300
11,700
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9,000
(7,200 ~ 9,000)
12,000
(7,200 ~ 12,000)
15,000
(7,200 ~ 15,000)
16,200
(7,200 ~ 16,200)
22,000
(7,200 ~ 22,000)
18,000
(12,000 ~ 18,000)
21,000
(12,000 ~ 21,000)
24,000
(12,000 ~ 24,000)
25,200
(12,000 ~ 25,200)
28,000
(12,000 ~ 28,000)
24,000
(12,000 ~ 24,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
27,000
(12,600 ~ 27,000)
30,000
(12,600 ~ 30,000)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
–
–
–
–
–
9,000
12,000
15,000
16,200
20,400
12,000
14,500
15,200
13,000
13,800
13,000
9,000
9,000
8,800
8,200
6,900
11,700
9,000
12,000
15,000
16,200
22,000
9,000
9,000
9,000
9,000
7,600
12,000
11,500
10,800
13,000
12,200
13,000
9,000
9,000
8,800
8,200
6,900
8,700
Indoor units
combination
Unit A Unit B Unit C Unit D
Cooling capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V
MXZ-4A36NA 208V
800
(650 ~ 800)
1,000
(650 ~ 1,000)
1,320
(650 ~ 1,320)
1,480
(650 ~ 1,480)
2,200
(650 ~ 2,200)
1,800
(920 ~ 1,800)
2,000
(920 ~ 2,000)
2,500
(920 ~ 2,500)
2,700
(920 ~ 2,700)
3,200
(920 ~ 3,200)
2,500
(920 ~ 2,500)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,860
(1,000 ~ 2,850)
3,270
(1,000 ~ 3,270)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
10
Indoor units
combination
09+12+15
09+12+17
09+15+15
09+15+17
09+17+17
12+12+12
12+12+15
12+12+17
12+15+15
09+09+09+09
09+09+09+12
09+09+09+15
09+09+12+12
Cooling capacity (BTU/h)
Unit A Unit B Unit C Unit D
8,000
7,600
7,500
7,100
6,700
10,700
9,900
9,400
9,100
9,000
8,300
7,700
7,700
10,700
10,100
12,300
11,700
12,700
10,700
9,900
9,400
11,500
9,000
8,300
7,700
7,700
13,400
14,400
12,300
13,300
12,700
10,700
12,300
13,300
11,500
9,000
8,300
7,700
10,300
–
–
–
–
–
–
–
–
–
9,000
11,100
12,900
10,300
Total
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
36,000
(12,600 ~ 36,400)
36,000
(12,600 ~ 36,400)
36,000
(12,600 ~ 36,400)
36,000
(12,600 ~ 36,400)
Power consumption
(W)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,820
(1,000 ~ 3,900)
3,820
(1,000 ~ 3,900)
3,820
(1,000 ~ 3,900)
3,820
(1,000 ~ 3,900)
Current
(A)
208V
17.35
17.35
17.35
17.35
17.35
17.35
17.35
17.35
17.35
18.55
18.55
18.55
18.55
Power
factor
(%)
97
97
97
97
97
97
97
97
97
99
99
99
99
11
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
09+09+24
09+12+12
09+12+15
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
5.57
6.98
9.82
11.34
12.75
8.43
9.81
10.90
10.90
9.81
10.90
10.71
10.61
10.51
10.46
10.41
13.38
13.38
13.38
13.38
13.38
13.38
13.38
Indoor units
combination
Unit A Unit B Unit DUnit C
Heating capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
208V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10,800
12,400
14,600
15,600
16,800
11,500
13,700
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10,900
(8,600 ~ 15,400)
13,600
(8,600 ~ 16,400)
18,000
(8,600 ~ 21,100)
20,100
(8,600 ~ 21,500)
23,200
(8,600 ~ 27,800)
21,800
(11,000 ~ 31,000)
24,500
(11,000 ~ 33,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
–
–
–
–
–
10,900
13,600
16,900
17,700
19,700
13,500
15,000
15,800
13,500
14,300
13,500
10,800
10,000
8,900
8,400
7,800
11,500
10,400
1,100
(780 ~1,520)
1,380
(780 ~ 1,600)
1,940
(780 ~ 2,280)
2,240
(780 ~ 2,300)
2,520
(780 ~ 3,000)
1,700
(740 ~2,560)
1,980
(740 ~ 2,800)
2,200
(740 ~ 2,920)
2,200
(740 ~ 2,920)
1,980
(740 ~ 2,740)
2,200
(740 ~ 2,920)
2,160
(740 ~ 2,860)
2,140
(740 ~ 2,860)
2,120
(740 ~ 2,800)
2,110
(740 ~ 2,800)
2,100
(740 ~ 2,800)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
10,900
13,600
18,000
20,100
23,200
10,900
10,900
10,100
9,300
7,300
13,500
12,000
11,200
13,500
12,700
13,500
10,800
10,000
8,900
8,400
7,800
9,400
8,300
12
Indoor units
combination
09+12+17
09+15+15
09+15+17
09+17+17
12+12+12
12+12+15
12+12+17
12+15+15
09+09+09+09
09+09+09+12
09+09+09+15
09+09+12+12
Heating capacity (BTU/h)
Unit A Unit B Unit DUnit C
7,900
7,600
7,200
7,000
10,800
9,700
9,300
9,000
9,000
8,300
7,700
7,700
9,900
12,400
11,900
12,700
10,800
9,700
9,300
11,700
9,000
8,300
7,700
7,700
14,600
12,400
13,300
12,700
10,800
13,000
13,800
11,700
9,000
8,300
7,700
10,300
–
–
–
–
–
–
–
–
9,000
11,100
12,900
10,300
Total
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
36,000
(11,400 ~ 41,200)
36,000
(11,400 ~ 41,200)
36,000
(11,400 ~ 41,200)
36,000
(11,400 ~ 41,200)
Power consumption
(W)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
3,100
(740 ~ 4,000)
3,100
(740 ~ 4,000)
3,100
(740 ~ 4,000)
3,100
(740 ~ 4,000)
Current
(A)
208V
13.38
13.38
13.38
13.38
13.38
13.38
13.38
13.38
15.05
15.05
15.05
15.05
Power
factor
(%)
97
97
97
97
97
97
97
97
99
99
99
99
13
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
09+09+24
09+12+12
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
3.66
4.58
6.04
6.77
10.07
8.07
8.96
11.21
12.10
14.34
11.21
12.55
12.55
12.55
12.55
12.55
12.82
14.66
15.69
15.69
15.69
15.69
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9,000
12,000
14,500
15,700
18,300
11,700
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
9,000
(7,200 ~ 9,000)
12,000
(7,200 ~ 12,000)
15,000
(7,200 ~ 15,000)
16,200
(7,200 ~ 16,200)
22,000
(7,200 ~ 22,000)
18,000
(12,000 ~ 18,000)
21,000
(12,000 ~ 21,000)
24,000
(12,000 ~ 24,000)
25,200
(12,000 ~ 25,200)
28,000
(12,000 ~ 28,000)
24,000
(12,000 ~ 24,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
26,000
(12,000 ~ 26,000)
27,000
(12,600 ~ 27,000)
30,000
(12,600 ~ 30,000)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
–
–
–
–
–
9,000
12,000
15,000
16,200
20,400
12,000
14,500
15,200
13,000
13,800
13,000
9,000
9,000
8,800
8,200
6,900
11,700
9,000
12,000
15,000
16,200
22,000
9,000
9,000
9,000
9,000
7,600
12,000
11,500
10,800
13,000
12,200
13,000
9,000
9,000
8,800
8,200
6,900
8,700
Indoor units
combination
Unit A Unit B Unit C Unit D
Cooling capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
230V
MXZ-4A36NA 230V
800
(650 ~ 800)
1,000
(650 ~ 1,000)
1,320
(650 ~ 1,320)
1,480
(650 ~ 1,480)
2,200
(650 ~ 2,200)
1,800
(920 ~ 1,800)
2,000
(920 ~ 2,000)
2,500
(920 ~ 2,500)
2,700
(920 ~ 2,700)
3,200
(920 ~ 3,200)
2,500
(920 ~ 2,500)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,800
(920 ~ 2,800)
2,860
(1,000 ~ 2,850)
3,270
(1,000 ~ 3,270)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
14
Indoor units
combination
09+12+15
09+12+17
09+15+15
09+15+17
09+17+17
12+12+12
12+12+15
12+12+17
12+15+15
09+09+09+09
09+09+09+12
09+09+09+15
09+09+12+12
Cooling capacity (BTU/h)
Unit A Unit B Unit C Unit D
8,000
7,600
7,500
7,100
6,700
10,700
9,900
9,400
9,100
9,000
8,300
7,700
7,700
10,700
10,100
12,300
11,700
12,700
10,700
9,900
9,400
11,500
9,000
8,300
7,700
7,700
13,400
14,400
12,300
13,300
12,700
10,700
12,300
13,300
11,500
9,000
8,300
7,700
10,300
–
–
–
–
–
–
–
–
–
9,000
11,100
12,900
10,300
Total
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
32,100
(12,600 ~ 32,100)
36,000
(12,600 ~ 36,400)
36,000
(12,600 ~ 36,400)
36,000
(12,600 ~ 36,400)
36,000
(12,600 ~ 36,400)
Power consumption
(W)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,500
(1,000 ~ 3,500)
3,820
(1,000 ~ 3,900)
3,820
(1,000 ~ 3,900)
3,820
(1,000 ~ 3,900)
3,820
(1,000 ~ 3,900)
Current
(A)
230V
15.69
15.69
15.69
15.69
15.69
15.69
15.69
15.69
15.69
16.78
16.78
16.78
16.78
Power
factor
(%)
97
97
97
97
97
97
97
97
97
99
99
99
99
15
09
12
15
17
24
09+09
09+12
09+15
09+17
09+24
12+12
12+15
12+17
15+15
15+17
17+17
09+09+09
09+09+12
09+09+15
09+09+17
09+09+24
09+12+12
09+12+15
95
95
95
95
95
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
97
5.03
6.32
8.88
10.25
11.53
7.62
8.87
9.86
9.86
8.87
9.86
9.68
9.59
9.50
9.46
9.41
12.10
12.10
12.10
12.10
12.10
12.10
12.10
Indoor units
combination
Unit A Unit B Unit DUnit C
Heating capacity (BTU/h)
Total
Power consumption
(W)
Current
(A)
Power
factor
(%)
230V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10,800
12,400
14,600
15,600
16,800
11,500
13,700
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10,900
(8,600 ~ 15,400)
13,600
(8,600 ~ 16,400)
18,000
(8,600 ~ 21,100)
20,100
(8,600 ~ 21,500)
23,200
(8,600 ~ 27,800)
21,800
(11,000 ~ 31,000)
24,500
(11,000 ~ 33,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
27,000
(11,000 ~ 35,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
–
–
–
–
–
10,900
13,600
16,900
17,700
19,700
13,500
15,000
15,800
13,500
14,300
13,500
10,800
10,000
8,900
8,400
7,800
11,500
10,400
1,100
(780 ~1,520)
1,380
(780 ~ 1,600)
1,940
(780 ~ 2,280)
2,240
(780 ~ 2,300)
2,520
(780 ~ 3,000)
1,700
(740 ~2,560)
1,980
(740 ~ 2,800)
2,200
(740 ~ 2,920)
2,200
(740 ~ 2,920)
1,980
(740 ~ 2,740)
2,200
(740 ~ 2,920)
2,160
(740 ~ 2,860)
2,140
(740 ~ 2,860)
2,120
(740 ~ 2,800)
2,110
(740 ~ 2,800)
2,100
(740 ~ 2,800)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
10,900
13,600
18,000
20,100
23,200
10,900
10,900
10,100
9,300
7,300
13,500
12,000
11,200
13,500
12,700
13,500
10,800
10,000
8,900
8,400
7,800
9,400
8,300
16
Indoor units
combination
09+12+17
09+15+15
09+15+17
09+17+17
12+12+12
12+12+15
12+12+17
12+15+15
09+09+09+09
09+09+09+12
09+09+09+15
09+09+12+12
Heating capacity (BTU/h)
Unit A Unit B Unit DUnit C
7,900
7,600
7,200
7,000
10,800
9,700
9,300
9,000
9,000
8,300
7,700
7,700
9,900
12,400
11,900
12,700
10,800
9,700
9,300
11,700
9,000
8,300
7,700
7,700
14,600
12,400
13,300
12,700
10,800
13,000
13,800
11,700
9,000
8,300
7,700
10,300
–
–
–
–
–
–
–
–
9,000
11,100
12,900
10,300
Total
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
32,400
(11,400 ~ 36,000)
36,000
(11,400 ~ 43,000)
36,000
(11,400 ~ 43,000)
36,000
(11,400 ~ 43,000)
36,000
(11,400 ~ 43,000)
Power consumption
(W)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
2,700
(740 ~ 2,880)
3,100
(740 ~ 4,350)
3,100
(740 ~ 4,350)
3,100
(740 ~ 4,350)
3,100
(740 ~ 4,350)
Current
(A)
230V
12.10
12.10
12.10
12.10
12.10
12.10
12.10
12.10
13.61
13.61
13.61
13.61
Power
factor
(%)
97
97
97
97
97
97
97
97
99
99
99
99
17
4
1
1
1
Item Model
Capacity
Power
consumption
EER [SEER]
HSPF IV (V)
COP
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor
Compressor
Refrigerant control
Sound level
Defrost method
Dimensions
Weight
Remote controller
Control voltage (by built-in transformer)
Refrigerant piping
Valve size
Connection method
Refrigerant charge (R410A)
Refrigeration oil (Model)
Model
Winding resistance (at 68˚F) "
W
D
H
Liquid
Gas
Indoor
Outdoor
Btu/h
Btu/h
Btu/h
W
W
W
V, phase, Hz
A
A
F.L.A
R.L.A
L.R.A
dB(A)
in.
in.
in.
lb.
in.
in.
lb.
oz.
20,000/ (7,800 ~ 20,000)
22,000/ (8,500 ~ 22,000)
14,500
2,150/ (630 ~ 2,150)
1,780/ (520 ~ 1,780)
1,500 (1,500)
9.3 [15
]
9.0 (7.0)
3.63
Munsell 5Y 8/1
208/230, 1, 60
20
15
0.96
U-V 0.45 V-W 0.45 W-U 0.45
U-V 0.98 V-W 0.98 W-U 0.98
10.1
15
LEV
49/51
Reverse cycle
33-1/16
13
27-15/16
130
Wireless type
12-24V DC
Not supplied (optional parts)
1/4
A,B:3/8
Flared
Flared
5lb. 15oz.
❈1 ❈3
❈1
❈1
❈2
❈1
❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
MXZ-2A20NA MXZ-2A20NA -
SNB130FPDH1
SNB130FQBH1
20.3 (NEO22)
23.7 (NEO22)
MXZ-2A20NA
MXZ-2A20NA -
MXZ-2A20NA
MXZ-2A20NA -
1
MXZ-2A20NA
MXZ-2A20NA -
Cooling
Heating
Mode
❈1: "A" Cooling steady state at rated compressor speed
❈3: "B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
w
❈1: Standard rating-heating at rated compressor speed
❈2: Low temperature heating at rated compressor speed
Max. temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
w
Test
Indoor air condition Outdoor air condition
Dry bulb
Wet bulb
Dry bulb
Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
w
At intermediate compressor speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
Unit: ˚F
SPECIFICATION
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB
❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB
18
Item Model
❈1
❈1
❈1
❈2
❈1
❈2
Btu/h
Btu/h
Btu/h
Capacity
Power
consumption
❈1 ❈3
EER [SEER]
HSPF IV (V)
COP
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
External finish
Power supply
V, phase, Hz
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor
F.L.A
Model
Compressor
Winding resistance (at 68˚F) "
R.L.A
L.R.A
Refrigerant control
Sound level
dB(A)
Defrost method
W
Dimensions
D
H
Weight
Remote controller
Control voltage (by built-in transformer)
Refrigerant piping
Valve size
Connection method
Liquid
Gas
Indoor
Outdoor
Refrigerant charge (R410A)
Refrigeration oil (Model)
W
W
W
A
A
in.
in.
in.
MXZ-3A30NA
lb.
MXZ-3A30NA -
in.
in.
lb.
oz.
MXZ-3A30NA MXZ-3A30NA -
28,400/ (12,600 ~ 28,400)
28,600/ (11,400 ~ 36,000)
18,800
3,250/ (1,000 ~ 3,250)
2,180/ (740 ~ 2,880)
2,120
8.7 [16.0
]
10.0 (7.5)
3.84
Munsell 3.0Y 7.8/1.1
208/230, 1, 60
20
15
0.93
TNB220FMCH
U-V 0.61 V-W 0.61 W-U 0.61
11
15
LEV
49/49
Reverse cycle
35-7/16
12-19/32
35-7/16
158
1
148
Wireless type
12-24V DC
Not supplied (optional parts)
1/4
A:1/2 B,C:3/8
Flared
Flared
7lb. 11oz.
29.4 (NEO22)
1
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB
❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB
Mode
Cooling
❈1: "A" Cooling steady state at rated compressor speed
❈3: "B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
Heating
❈1: Standard rating-heating at rated compressor speed
❈2: Low temperature heating at rated compressor speed
Max. temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
w
At intermediate compressor speed
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB
Test
w
w
Indoor air condition Outdoor air condition
Dry bulb
80
80
80
80
80
70
70
70
70
70
70
Wet bulb
67
67
67
67
67
60
60
60
60
60
60
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
19
Dry bulb
95
82
82
67
87
47
17
62
47
35
35
Unit: ˚F
Wet bulb
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Item
208V
208V
36,000/ (11,400 ~ 41,200)
3,100/ (740 ~ 4,000)
230V
230V
36,000/ (11,400 ~ 43,000)
3,100/ (740 ~ 4,350)
Model
Capacity
Power
consumption
EER [SEER]
HSPF IV (V)
COP
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor
Compressor
Refrigerant control
Sound level
Defrost method
Dimensions
Weight
Remote controller
Control voltage (by built-in transformer)
Refrigerant piping
Valve size
Connection method
Refrigerant charge (R410A)
Refrigeration oil (Model)
Model
Winding resistance (at 68˚F) "
W
D
H
Liquid
Gas
Indoor
Outdoor
Btu/h
Btu/h
Btu/h
W
W
W
V, phase, Hz
A
A
F.L.A
R.L.A
L.R.A
dB(A)
in.
in.
in.
lb.
in.
in.
lb.
oz.
36,000/ (12,600 ~ 36,400)
24,600
3,820/ (1,000 ~ 3,900)
3,340
9.4 [16.0
]
9.5 (7.0)
3.40
Munsell 3.0Y 7.8/1.1
208/230, 1, 60
20
19
0.93
TNB220FMCH
U-V 0.61 V-W 0.61 W-U 0.61
14.4
15
LEV
54/57
Reverse cycle
35-7/16
12-19/32
35-7/16
150
Wireless type
12-24V DC
Not supplied (optional parts)
1/4
A:1/2 B,C,D:3/8
Flared
Flared
8lb. 13oz.
29.4 (NEO22)
❈1 ❈3
❈1
❈1
❈2
❈1
❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
MXZ-4A36NA
Cooling
Heating
Mode
❈1: "A" Cooling steady state at rated compressor speed
❈3: "B-2" Cooling steady state at rated compressor speed
"B-1" Cooling steady state at minimum compressor speed
Low ambient cooling steady state at minimum compressor speed
Intermediate cooling steady state at intermediate compressor speed
w
❈1: Standard rating-heating at rated compressor speed
❈2: Low temperature heating at rated compressor speed
Max. temperature heating at minimum compressor speed
High temperature heating at minimum compressor speed
Frost accumulation at rated compressor speed
Frost accumulation at intermediate compressor speed
w
Test
Indoor air condition Outdoor air condition
Dry bulb
Wet bulb
Dry bulb
Wet bulb
80
80
80
80
80
70
70
70
70
70
70
67
67
67
67
67
60
60
60
60
60
60
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
w
At intermediate compressor speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
Unit: ˚F
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB)
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB
❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB
20
5
OUTLINES AND DIMENSIONS
MXZ-2A20NA MXZ-2A20NA -
6-9/16" 6-21/32"
2-1/2"
1-7/32"21/32"
Air in
Drain hole 3-
14-3/16"
19-11/16"
11-11/32"9-3/16"
1-25/32"
1-1/2"1-7/32"
11/16" 11/16"14-3/16"
4-13/32"
(Base bolt M10)
1-3/16"33-1/16"
5-5/16"
Air in
Air out
[1-5/16"
15/16"
11-3/4" 2-5/8"
29/32"
1
15-19/32"
✕13/16" Oval hole
Indoor and outdoor
connect wiring
3-
[7/8" hole
1-3/16"12-3/4"
1-3/16"
27-15/16"
8-5/8"
More than 3.94 in.
1"
Liquid pipe
[1/4"flared (both A&B unit)
REQUIRED SPACE
Open as a rule
More than 19.69 in.
if the front and both sides are
open
Open as a rule
More than 19.69 in.
if the back, both sides
and top are open
1/2"1-3/16" 13"
Gas pipe
[3/8"flared (both A&B unit)
B unit connection
A unit connection
Unit: inch
More than 3.94 in.
More than 7.87 in.
if there are obstacles to both
sides
More than 13.78 in.
21
Grounding terminal
Conduit
cover
Lock nut
Connector
MXZ-3A30NA
3-15/32"
29/32"
1-1/4"
3-25/32"
29-9/16"
2-11/16"
15"
9-27/32"
1-3/16"
35-7/16"
1-5/16"
(7-7/8")
(5/8")
(1-1/16")
13-31/32"
(5/8")
15-1/4"
1-9/16"
12-19/32" 13/32"
7-7/8" 19-11/16"
35-7/16"
18-1/8"
12-1/2"
1-31/32"
29/32"
9-27/32"
10-5/8"
1-3/8"
1-3/8"
2-29/32"
Indoor and outdoor
connect wiring
4-[7/8" hole
Gas pipe
[1/2" flared (A unit)
[3/8" flared (B,C unit)
[1/4" flared
Liquid pipe
C unit connection
B unit connection
A unit connection
Air in
Drain hole 3-[1-5/16"
Air out
Air in
(Base bolt M10)
2-U-shape notched holes
(Base bolt M10)
2-15/32"✕1-13/32" Oval hole
More than 3.94 in.
Open as a rule
More than 19.69 in.
if the front and both sides are
open
More than 3.94 in.
More than 7.87 in.
if there are
obstacles to both
sides
Open as a rule
More than 19.69 in.
if the back, both sides
and top are open
More than 13.78 in.
Conduit cover
Lock nut
Connector
Unit: inch
REQUIRED SPACE
22
MXZ-3A30NA -
A
B
C
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15/16"
7/16"
5/8"
5/8"
1-1/16"
1-9/16"
14"
15-1/4"
10-5/8"
9-27/32"
1-3/8"
19-11/16" 7-7/8"7-7/8"
2-29/32"
1-3/8"
(Bolt pitch)
Air in
Air out
Air in
2-(15/32"o1-13/32") Oval hole
2-U Shaped notched hole
(Base bolt M10)
3-[7/8"Punched hole
(Connect wiring hole)
35-7/16"
(Connect wiring hole)
2-[7/8"Knockout
Handle
Handle
8-27/32"
1-25/32"
19-1/8"
12-1/2"
18-1/8"
29/32"
13/32"12-19/32"1-3/16"
3-15/32"
Gas pipe
[3/8 (B,C unit)
[1/2 (A unit)
More than 3-15/16"
More than 19-11/16"
More than 7-7/8"
More than13-25/32"
More than 3-15/16"
More than 19-11/16"
More than 13-25/32"
More than 13-25/32"
More than 3-15/16"
SERVICE SPACE
More than 3-15/16"
More than 19-11/16"
5-3/16"
Liquid pipe
[1/4 flared
35-7/16"
1-3/16"
4-3/4"
(Base bolt M10)
Drain hole 3-[1-5/16"
Note : Leave front and both sides
clearance fully.
Note : Leave front and overhead
clearance fully.
Note : Leave front, overhead and
both sides clearance fully.
1.Installation space
2.Service space
C unit connection
B unit connection
A unit connection
Conduit cover
Lock nut
Connector
1 Unit: inch
23
MXZ-4A36NA
A
B
C
D
15/16"
7/16"
5/8"
5/8"
1-1/16"
1-9/16"
14"
15-1/4"
10-5/8"
9-27/32"
1-3/8"
19-11/16" 7-7/8"7-7/8"
2-29/32"
1-3/8"
(Bolt pitch)
Air in
Air out
Air in
2-(15/32"o1-13/32") Oval hole
2-U Shaped notched hole
(Base bolt M10)
3-[7/8"Punched hole
(Connect wiring hole)
35-7/16"
(Connect wiring hole)
2-[7/8"Knockout
Handle
Handle
12-13/32"
1-25/32"
19-1/8"
12-1/2"
18-1/8"
29/32"
13/32"12-19/32"1-3/16"
3-15/32"
Gas pipe
[3/8 (B,C,D unit)
[1/2 (A unit)
More than 3-15/16"
More than 19-11/16"
More than 7-7/8"
More than13-25/32"
More than 3-15/16"
More than 19-11/16"
More than 13-25/32"
More than 13-25/32"
More than 3-15/16"
SERVICE SPACE
More than 3-15/16"
More than 19-11/16"
5-3/16"
Liquid pipe
[1/4 flared
35-7/16"
1-3/16"
4-3/4"
(Base bolt M10)
Drain hole 3-[1-5/16"
Note : Leave front and both sides
clearance fully.
Note : Leave front and overhead
clearance fully.
Note : Leave front, overhead and
both sides clearance fully.
1.Installation space
2.Service space
C unit connection
D unit connection
B unit connection
A unit connection
Unit: inch
24
Lock nut
Conduit cover
Connector
6
MXZ-2A20NA
WIRING DIAGRAM
25
MXZ-2A20NA -
1
26
MXZ-3A30NA
27
MXZ-3A30NA -
1
28
MXZ-4A36NA
V
BOARD
POWER
PFC
FILTERNOISE
P.C.BOARD
L
MC
CT1
X64
CT61
W
U
BLK
U
CB3
CB2
CB1
R
RED
1
2
BLK
3
GROUND
S
YLW
4
3
WHT
TAB4
F64
TAB1
BLK
TB1
L1
SUPPLY
POWER
WHT
IPM
BLK
12
CN903
R64B
R64A
N/F
TAB2
BLU
L2
60Hz
208/230V
1phase
V
12
NR64
N
CN5
BLK
F65
321
RED
CT2
1432
BLK
12
CN902
N/F
CN61
BLU
W
RS3
RS1
CN2
567
SSR61
BLK
INDOOR
TO
12-24V
No.D
UNIT
RT64
BLK
BLK
21
CN3
LD9
RS4
LD1
LD2
RS2
12
CN4
CN901
12345
CN912
BLU
21
BLU
BLK
LDE2
BLK
LDE1
CN631
123
BRN
BLK
BLU
TB5
S2S3S1
60Hz
208/230V
1PH.
No.C
INDOOR
UNIT
TO
CONNECTING
BLK
CN801
WHT
123
RED
BLK
12
BLK
BLK
BLK
5432176
BLK
BLK
BLK
BLK
BLK
12345
BLK
21S4
CN621
123
GRY
TB4
S1S3S2
60Hz
208/230V
1PH.
12-24V
CONNECTING
WHT
BLK
12312345
CN932
HC930
F931
F801
T801
CN701
CN702
P.C.BOARDCONTROLELECTRONIC
CN781
CN611
321
RED
ORN
BLK
TB3
S1
S2
S3
208/230V
12-24V
No.B
INDOOR
UNIT
TO
CONNECTING
RED
R930A
54
60Hz
1PH.
MF
YLW
R930B
CN601
BLU
BLK
BLK
BLU BLU
S3
No.A
INDOOR
TO
UNIT
BLU
(GRN)
(WHT) (RED) (BLU)
123
12-24V
GRY
PNK
ORN
CN931
WHT
YLW
ORN
BLU
CN796
BRN
RED
143256
GRY
21
GRY
CN663
GRY
81 234567
GRY
BLK
CN661
BLK
GRY
GRY
RED
21
RED
CN681
WHT
YLW
ORN
BLU
CN794
BRN
RED
1 43256
WHT
652 341
YLW
ORN
BLU
CN793
BRN
RED
WHT
652341
YLW
ORN
BLU
CN792
BRN
RED
WHT
652341
YLW
ORN
BLU
CN791
BRN
RED
TB2
S1
S2
60Hz
208/230V
1PH.
CONNECTING
F
LEV
RT68 RT65
RT61
HPS
D
LEV
C
LEV
B
LEV
A
LEV
RT62
unit
for
electric
indoor
side
the
diagram
to
indoor
wiring
refer
the
wiring
electric
NOTES:
servicing.
1.About
COIL
BLOCK
SOLENOID
NAME
RELAY
VALVE
TRANSFORMER
TERMINAL
REVERSING
X64
21S4
T801
TB1~5
SYMBOL
NAME
TEMP.THERMISTOR
THERMISTOR
TEMP.THERMISTOR
TEMP.THERMISTOR
AMBIENT
FIN
DISCHARGE
DEFROST
RT61
RT64
RT65
RT62
SYMBOL
CONTROLLER
FILTER
MOTOR
NAME
VARISTOR
FAN
FACTOR
NOISE
POWER
MF
N/F
PFC
NR64
SYMBOL
MODULE
MODULE
SWITCHHPS
NAMESYMBOL
POWER
POWER
REACTOR
PRESSURE
INTELLIGENT
INTELLIGENT
HIGH
L
IPM
HC930
CAPACITOR
TRANSFORMER
TRANSFORMER
CURRENT
CURRENT
CT61
F64 FUSE(T2AL250V)
CT1,2
SYMBOL NAME
CB1~3 SMOOTHING
only
block
indicate.
conductors
copper
2.Use
:connector
wiring).
below
:Terminal
field
(For
3.Symbols
RELAYRS1~4 RESISTOR
EXCHANGER
THERMISTOR
COIL
HEAT
TEMPERATURE
OUTDOOR
RT68
SSR61 SOLENOID
RESISTOR
RESISTOR
R64A,B
R930A,B
VALVE
VALVE
COMPRESSORMC
EXPANSION
EXPANSION
F
A~D
LEV
LEV
FUSE(T3.15AL250V)
F931 FUSE(T3.15AL250V)
F65 FUSE(T6.3AL250V)
F801
29
7
REFRIGERANT SYSTEM DIAGRAM
MXZ-2A20NA MXZ-2A20NA -
R.V. coil
OFF
ON
Indoor unit
B
Indoor unit
A
Indoor unit
Indoor unit
Refrigerant flow in cooling
Refrigerant flow in heating
Unit B gas pipe
temperature thermistor
Unit A gas pipe
temperature thermistor
O.D.0.16✕I.D.0.11✕ 3.93
A
O.D.0.16✕I.D.0.11✕ 3.93
B
Strainer
#100
Strainer
#100
W
Capillary tube
Capillary tube
Oil separator
W
LEV A
LEV B
Ball valve with
service port
Ball valve
Service
port
Muffler
1
Compressor
Discharge
temperature
thermistor RT62
Capillary tube
O.D.0.98✕I.D.0.02✕39.37
4-way valve
Strainer
#100
Service
port
Power
receiver
LEV E
Outdoor heat
exchanger
temperature
thermistor
RT68
HEX-OUT
Strainer
#100
FAN-OUT
Capillary tube
O.D.0.14✕I.D.0.09✕19.68
Distributor
Unit:mm
Ambient
temperature
thermistor
RT65
Defrost
thermistor
RT61
W Except MXZ-2A20NA - .
1
30
Operating Range MXZ-2A20NA MXZ-2A20NA -
Indoor intake air temperature
Cooling
Heating
Maximum
Minimum
Maximum
Minimum
95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB
1
Outdoor intake air temperature
115˚FDB
14˚FDB
75˚FDB, 65˚FWB
14˚FDB, 12˚FWB
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
MXZ-2A20NA MXZ-2A20NA -
Piping length each indoor unit (a, b) 82ft. MAX.
Total piping length (a+b) 164ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 60 MAX.
1
❋It does not matter which unit is higher.
Indoor
units
a
Outdoor
unit
b
49ft.
49ft.
33ft.
● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension 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 15-1.
Indoor unit
class Pipe diameter
09
12
15
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Extension pipe diameter
Outdoor unit union diameter
For
Indoor unit A
Indoor unit B
Liquid 1/4
Gas 3/8
Liquid 1/4
Gas 3/8
Unit : inch
31
Indoor unit
C
Ball valve with
service port
Ball valve
Distributor
Power
receiver
LEV A
LEV B
LEV C
Oil separator
Compressor
High-pressure
switch
Distributor
Muffler
4-way valve
LEV E
Outdoor
heat
exchanger
Unit C gas pipe
temperature thermistor
Indoor unit
B
Unit B gas pipe
temperature thermistor
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C
Unit A gas pipe
temperature thermistor
Capillary tube
O.D.0.16✕I.D.0.09✕15.75
Capillary tube
O.D.0.10✕I.D.0.02✕39.37
Capillary tube
O.D.0.16✕I.D.0.11✕ 3.54
Discharge
temperature
thermistor RT62
Strainer
#100
Strainer
#100
Strainer
#100
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Defrost
thermistor
RT61
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
Strainer
#100
Strainer
#100
Service
port
Service
port
Stop valve
(with service port)
Stop valve
Power
receiver
LEV A
LEV B
LEV C
Oil separator
Compressor
Muffler
4-way valve
LEV F
Indoor unit
C
Indoor unit
B
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C
Capillary tube
O.D.0.10✕I.D.0.02✕39.37
Capillary tube
O.D.0.16✕I.D.0.11✕3.94
Discharge
temperature
thermistor RT62
Service port
Service
port
Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#100
Distributor
Outdoor
heat
exchanger
Capillary tube
O.D.0.12✕I.D.0.08✕11.8
Defrost
thermistor
RT61
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
High-pressure
switch
MXZ-3A30NA
Unit:mm
MXZ-3A30NA -
1
32
Unit:mm
Operating Range MXZ-3A30NA MXZ-3A30NA -
1
Outdoor intake air temperature
115˚FDB
14˚FDB
75˚FDB, 65˚FWB
14˚FDB, 12˚FWB
Cooling
Heating
Maximum
Minimum
Maximum
Minimum
Indoor intake air temperature
95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
MXZ-3A30NA MXZ-3A30NA -
Piping length each indoor unit (a, b, c) 82ft. MAX.
Total piping length (a+b+c) 230ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 70 MAX.
❋It does not matter which unit is higher.
1
Indoor
units
a
Outdoor
unit
b
33ft.
(MXZ-3A30NA)
49ft.
(MXZ-3A30NA - )
33ft.
1
(MXZ-3A30NA)
49ft.
(MXZ-3A30NA - )
1
c
33ft.
● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension 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 15-1.
Indoor unit
class Pipe diameter
09
12
15
17
24
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 1/2 Gas 1/2
Liquid 1/4 Liquid 1/4
Gas 5/8 Gas 5/8
Extension pipe diameter
Outdoor unit union diameter
For
Indoor unit A
Indoor unit B
Indoor unit C
Liquid 1/4
Gas 1/2
Liquid 1/4
Gas 3/8
Liquid 1/4
Gas 3/8
Unit : inch
33
Stop valve
(with service port)
Stop valve
Power
receiver
LEV A
LEV B
LEV C
Oil separator
Compressor
Muffler
4-way valve
LEV F
Indoor unit
C
Indoor unit
B
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C
Capillary tube
O.D.0.10✕I.D.0.02✕39.37
Capillary tube
O.D.0.16✕I.D.0.11✕3.94
Discharge
temperature
thermistor RT62
Service port
Service
port
Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#100
Distributor
Outdoor
heat
exchanger
Capillary tube
O.D.0.12✕I.D.0.08✕11.8
Defrost
thermistor
RT61
Outdoor heat
exchanger
temperature
thermistor
RT68
Ambient
temperature
thermistor
RT65
High-pressure
switch
Indoor unit
D
LEV D
Indoor unit
D
Strainer
#100
MXZ-4A36NA
Unit:mm
34
Operating Range MXZ-4A36NA
a
b
c
d
Outdoor
unit
Indoor
units
49ft.
33ft.
49ft.
Cooling
Heating
Maximum
Minimum
Maximum
Minimum
Indoor intake air temperature
95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB
Outdoor intake air temperature
115˚FDB
14˚FDB
75˚FDB, 65˚FWB
14˚FDB, 12˚FWB
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
MXZ-4A36NA
Piping length each indoor unit (a, b, c, d) 82ft. MAX.
Total piping length (a+b+c+d) 230ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 70 MAX.
❋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
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 15-1.
Indoor unit
class Pipe diameter
09
12
15
17
24
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 3/8 Gas 3/8
Liquid 1/4 Liquid 1/4
Gas 1/2 Gas 1/2
Liquid 1/4 Liquid 1/4
Gas 5/8 Gas 5/8
Extension pipe diameter
35
Outdoor unit union diameter
For
Indoor unit A
Indoor unit B
Indoor unit C
Indoor unit D
Liquid 1/4
Gas 1/2
Liquid 1/4
Gas 3/8
Liquid 1/4
Gas 3/8
Liquid 1/4
Gas 3/8
Unit : inch
8
1
1
Capacity
SHF
Input
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current (208/230V)
Fan motor current (208/230V)
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp.
Ref. pipe length
[Total pipe length for multi-system]
Refrigerant charge (R410A)
Intake air temperature
Fan speed
Airflow
Unit
Btu / h
—
kW
kW
A
A
PSIG
PSIG
˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
rpm
CFM
Heating
22,000
–
1.78
1.743
8.24/7.45
0.43/0.39
363
101
169
106
40
144
47
43
700
1,640
DB
WB
Item
Model
Total
Electrical
circuit
Refrigerant
circuit
Outdoor
unit
Cooling
20,000
–
2.15
2.113
10.08/9.11
0.43/0.39
435
128
190
122
65
146
95
—
650
1,485
208/230, 1, 60
25 [50]
5lb.15oz.
MXZ-2A20NA MXZ-2A20NA -
MXZ-2A20NA MXZ-2A20NA -
DATA
36
Total
Electrical
circuit
Refrigerant
circuit
Outdoor
unit
Model
Item
Capacity
SHF
Input
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current (208/230V)
Fan motor current (208/230V)
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp.
Ref. pipe length
[Total pipe length for multi-system]
Refrigerant charge (R410A)
Intake air temperature
Fan speed
Airflow
DB
WB
Unit
Btu / h
—
kW
kW
A
A
PSIG
PSIG
˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
rpm
CFM
Cooling
28,400
–
3.25
3.197
15.45/13.97
0.43/0.39
506
136
190
132
48
146
95
—
520
1,365
MXZ-3A30NA MXZ-3A30NA -
MXZ-3A30NA MXZ-3A30NA -
208/230, 1, 60
7lb.11oz.
25 [75]
1
Heating
28,600
–
2.18
1
2.127
10.15/9.18
0.43/0.39
330
96
150
100
30
125
47
43
600
1,605
37
Capacity
SHF
Input
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current (208/230V)
Fan motor current (208/230V)
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp.
Ref. pipe length
[Total pipe length for multi-system]
Refrigerant charge (R410A)
Intake air temperature
Fan speed
Airflow
Unit
Btu / h
—
kW
kW
A
A
PSIG
PSIG
˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
rpm
CFM
Heating
36,000
–
3.1
3.036
14.36 /12.98
0.43 / 0.39
338
93
158
100
44
140
47
43
750
2,068
DB
WB
Item
Model
Total
Electrical
circuit
Refrigerant
circuit
Outdoor
unit
Cooling
36,000
–
3.82
3.756
17.85 / 16.14
0.43 / 0.39
458
136
194
125
62
180
95
—
750
2,068
MXZ-4A36NA
208/230, 1, 60
MXZ-4A36NA
25 [100]
8lb.13oz.
38
8-1. OPERATING RANGE
1
1
Outdoor unit
Rating
208/230V 60Hz 1[
Guaranteed Voltage
Model
Min. 198V Max. 253V
208V
230V
MXZ-2A20NA
MXZ-2A20NA -
MXZ-3A30NA
MXZ-3A30NA -
MXZ-4A36NA
w
At intermediate compressor speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
Function
Cooling
Heating
"A" Cooling steady state
at rated compressor speed
"B-2" Cooling steady state
at rated compressor speed
"B-1" Cooling steady state
at minimum compressor speed
Low ambient cooling steady state
at minimum compressor speed
Intermediate cooling steady state
at intermediate compressor speedw
Standard rating-heating
at rated compressor speed
Low temperature heating
at rated compressor speed
Max. temperature heating
at minimum compressor speed
High temperature heating
at minimum compressor speed
Frost accumulation
at rated compressor speed
Frost accumulation
at intermediate compressor speedw
DB (˚F)
80
80
80
80
80
70
70
70
70
70
70
WB (˚F)
67
67
67
67
67
60
60
60
60
60
60
Indoor
DB (˚F)
95
82
82
67
87
47
17
62
47
35
35
WB (˚F)
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
Outdoor
Condition
Intake air
temperature
(1) POWER SUPPLY
(2) OPERATION
39
Cooling
}
Heating
}
11
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA
The standard 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 ~ 253V 60Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °FWB
(2) Indoor outlet air wet-bulb temperature : °FWB
(3) Outdoor intake air dry-bulb temperature : °FDB
(4) Total input: W
(5) Indoor intake air dry-bulb temperature : °FDB
(6) Outdoor intake air wet-bulb temperature : °FWB
(7) Total input : W
Indoor air wet/dry-bulb temperature difference on the left side of the following chart 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. Compressor starts running at 33Hz (COOL) or 45Hz (HEAT). The frequency at each operation mode is fixed.
7. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
8. 10 minutes later, measure temperature again and check that the temperature does not change.
INDOOR UNIT OUTDOOR UNIT
Wet-and dry-bulb
thermometers
Wet-and dry-bulb
thermometers
40
8-2. CAPACITY AND THE INPUT CURVES
09 class
(20Hz)
17 class
(40Hz)
24 class
(56Hz)
15 class
(36Hz)
12 class
(27Hz)
80 85 90 95 100 105 110
80 85 90 95 100 105 110
79
75
72
68
64
79
75
72
68
64
Indoor unit class
(Inverter output
frequency)
Indoor air WB temperature
difference (degree)
14.0
13.0
11.9
10.6
9.5
8.6
16.7
15.3
14.0
13.0
11.3
10.1
20.0
18.4
16.6
14.9
13.5
11.9
22.0
20.2
18.2
16.4
14.8
13.0
19.6
18.0
16.4
14.8
13.1
11.7
09 class
(45Hz)
12 class
(56Hz)
15 class
(75Hz)
14 23 32 41 50 59 14 23 32 41 50 59
Indoor unit class
(Inverter output
frequency)
Indoor air DB temperature
difference (degree)
Indoor intake air Dry-bulb tem
perature (
-F)
Outdoor intake air Wet-bulb temperature (-F)
Outdoor intake air Wet-bulb temperature (-F)
Indoor intake air Dry-bulb temperature (-F)
43.2
40.0
36.5
33.3
29.9
26.6
23.2
20.0
47.0
43.4
39.8
36.0
32.4
28.8
25.2
21.6
57.4
53.1
48.6
44.3
39.8
35.5
31.0
26.5
59
68
79
79
68
59
09 class
(34Hz)
12 class
(42Hz)
15 class
(56Hz)
17 class
(60Hz)
24 class
(72Hz)
Indoor unit class
(Inverter output
frequency)
Indoor air DB temperature
difference (degree)
43.2
40.0
36.5
33.3
29.9
26.6
23.2
20.0
47.0
43.4
39.8
36.0
32.4
28.8
25.2
21.6
57.4
53.1
48.6
44.3
39.8
35.5
31.0
26.5
64.3
59.2
54.4
49.3
44.5
39.4
34.6
29.7
49.7
45.9
42.1
38.2
34.4
30.6
26.8
22.9
14 23 32 41 50 59 14 23 32 41 50 59
Indoor intake air Dry-bulb tem
perature (
-F)
Outdoor intake air Wet-bulb temperature (-F)
Outdoor intake air Wet-bulb temperature (-F)
Indoor intake air Dry-bulb temperature (-F)
59
68
79
79
68
59
MXZ-2A20NA MXZ-2A20NA -
20.0
16.7
14.0
18.4
15.3
13.0
16.6
14.0
11.9
14.9
13.0
10.6
13.5
11.3
9.5
difference (degree)
Indoor air WB temperature
8.6
(36Hz)
09 class
Indoor unit class
(Inverter output
frequency)
10.1
12 class
11.9
(50Hz)
15 class
80 85 90 95 100 105 110
(77Hz)
1
79
75
72
68
64
80 85 90 95 100 105 110
79
75
72
68
64
NOTE:The above broken lines are for the heating operation without any frost and defrost operation.
MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA
NOTE:The above broken lines are for the heating operation without any frost and defrost operation.
1
41
8-3. Capacity and input correction by means of inverter output frequency
(OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - )
1. 09-class unit in single operation
<COOL>Capacity
2.0
2.0
<COOL>Total input
1
2.0
<HEAT>Capacity
2.0
<HEAT>Total input
1.5
1.0
0.5
0 50 100
Frequency
Hz
2. 12-class unit in single operation
<COOL>Capacity
2.0
1.5
1.0
0.5
0 50 100
Frequency
Hz
3. 15-class unit in single operation
<COOL>Capacity
2.0
1.5
1.0
1.5
1.0
0.5
0 50 100
2.0
1.5
1.0
0.5
0 50 100
2.0
1.5
1.0
Frequency
<COOL>Total input
Frequency
<COOL>Total input
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
Frequency
<HEAT>Capacity
Frequency
<HEAT>Capacity
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
Frequency
<HEAT>Total input
Frequency
<HEAT>Total input
Hz
Hz
0.5
0 50 100
Frequency
0.5
0 50 100
Hz
Frequency
0.5
0 50 100
Hz
Frequency
0.5
0 50 100
Hz
Frequency
Hz
42
(OUTDOOR UNIT:MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA )
1. 09-class unit in single operation
2.0
<COOL>Capacity
2.0
<COOL>Total input
1
2.0
<HEAT>Capacity
2.0
<HEAT>Total input
1.5
1.0
0.5
0 50 100
Frequency
Hz
2. 12-class unit in single operation
<COOL>Capacity
2.0
1.5
1.0
0.5
0 50 100
Frequency
Hz
3. 15-class unit in single operation
<COOL>Capacity
2.0
1.5
1.0
1.5
1.0
0.5
0 50 100
2.0
1.5
1.0
0.5
0 50 100
2.0
1.5
1.0
Frequency
<COOL>Total input
Frequency
<COOL>Total input
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
Frequency
<HEAT>Capacity
Frequency
<HEAT>Capacity
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
Frequency
<HEAT>Total input
Frequency
<HEAT>Total input
Hz
Hz
0.5
0 50 100
Frequency
Hz
4. 17-class unit in single operation
<COOL>Capacity
2.0
1.5
1.0
0.5
0 50 100
Frequency
Hz
5. 24-class unit in single operation
<COOL>Capacity
2.0
1.5
1.0
0.5
0 50 100
Frequency
Hz
0.5
0 50 100
2.0
1.5
1.0
0.5
0 50 100
2.0
1.5
1.0
0.5
0 50 100
Frequency
<COOL>Total input
Frequency
<COOL>Total input
Frequency
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
Frequency
<HEAT>Capacity
Frequency
<HEAT>Capacity
Frequency
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
2.0
1.5
1.0
0.5
0 50 100
Hz
Frequency
<HEAT>Total input
Frequency
<HEAT>Total input
Frequency
Hz
Hz
Hz
43
8-4. Outdoor low pressure and outdoor unit current
65 70 75 80 85 90 95 100 105 110 115
120
130
140
150
160
170
Ambient temperature(°F)
(°F)
86
80
75
70
Indoor DB temperature(
°F)
65 70 75 80 85 90 95 100 105 110 115
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Ambient temperature(°F)
(°F)
(°F)
15 20 25 30 35 40 45 50 55 60 65 70 75
2.0
3.0
4.0
5.0
6.0
7.0
Ambient temperature(°F)
Outdoor low pressure
Outdoor unit current (A)
Outdoor unit current (A)
45Hz
(PSIG)
33Hz
33Hz
65
75
70
86
80
75
70
Indoor DB temperature(°F)
Indoor DB temperature(°F)
1. 09-class unit in single operation (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - )
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
(2) HEAT operation
1Data is based on the condition of indoor
humidity 75%
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High speed and continues for 30 minutes.
5.To cancel this operation, press emergency run ON/OFF button
or any button on remote controller.
1
44
2. 12-class unit in single operation (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - )
1
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High speed and continues for 30 minutes.
5.To cancel this operation, press emergency run ON/OFF button
or any button on remote controller.
(PSIG)
170
6.0
86
80
5.0
4.0
Indoor DB temperature(°F)
160
150
Indoor DB temperature(°F)
3.0
140
Outdoor low pressure
75
2.0
Outdoor unit current (A)
130
70
1.0
33Hz
33Hz
86
80
75
70
120
65 70 75 80 85 90 95 100 105 110 115
Ambient temperature(°F)
(2) HEAT operation
1Data is based on the condition of outdoor
humidity 75%.
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
0.0
(°F)
65 70 75 80 85 90 95 100 105 110 115
7.0
6.0
5.0
4.0
Outdoor unit current (A)
3.0
2.0
15 20 25 30 35 40 45 50 55 60 65 70 75
Ambient temperature(°F)
Indoor DB temperature(°F)
45Hz
Ambient temperature(°F)
(°F)
75
70
65
(°F)
45
3. 15-class unit in single operation (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - )
1
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High speed and continues for 30 minutes.
5.To cancel this operation, press emergency run ON/OFF button
or any button on remote controller.
(PSIG)
170
160
150
°F)
Indoor DB temperature(
86
80
6.0
5.0
4.0
Indoor DB temperature(
3.0
140
Outdoor low pressure
130
75
2.0
Outdoor unit current (A)
70
1.0
33Hz
°F)
33Hz
86
80
75
70
120
65 70 75 80 85 90 95 100 105 110 115
Ambient temperature(°F)
(2) HEAT operation
1Data is based on the condition of outdoor
humidity 75%
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
0.0
(°F)
65 70 75 80 85 90 95 100 105 110 115
Ambient temperature(°F)
7.0
6.0
5.0
4.0
Outdoor unit current (A)
Indoor DB temperature(
3.0
2.0
15 20 25 30 35 40 45 50 55 60 65 70 75
Ambient temperature(°F)
(°F)
°F)
75
70
65
45Hz
(°F)
46
4. 09-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA )
65 70 75 80 85 90 95 100 105 110 115
110
120
130
140
150
160
Ambient temperature(°F)
(°F)
86
80
75
70
Indoor DB temperature(
°F)
65 70 75 80 85 90 95 100105 110 115
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Ambient temperature(°F)
(°F)
(°F)
15 20 25 30 35 40 45 50 55 60 65 70 75
2.0
3.0
4.0
5.0
6.0
7.0
Ambient temperature(°F)
Outdoor low pressure
Outdoor unit current (A)
Outdoor unit current (A)
45Hz
(PSIG)
33Hz
33Hz
65
75
70
86
80
75
70
Indoor DB temperature(
°F)
Indoor DB temperature(°F)
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
(2) HEAT operation
1Data is based on the condition of outdoor
humidity 75%.
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High speed and continues for 30 minutes.
5.To cancel this operation, press emergency run ON/OFF button
or any button on remote controller.
1
47
5. 12-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA )
1
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High speed and continues for 30 minutes.
5.To cancel this operation, press emergency run ON/OFF button
or any button on remote controller.
(PSIG)
86
160
6.0
Indoor DB temperature(°F)
150
140
130
Outdoor low pressure
120
110
65 70 75 80 85 90 95 100 105 110 115
Ambient temperature(°F)
(2) HEAT operation
1Data is based on the condition of outdoor
humidity 75%.
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
33Hz
5.0
80
4.0
75
3.0
70
2.0
Outdoor unit current (A)
1.0
0.0
(°F)
65 70 75 80 85 90 95 100 105 110 115
7.0
6.0
5.0
Indoor DB temperature(°F)
Ambient temperature(°F)
33Hz
86
80
75
70
75
70
65
(°F)
Indoor DB temperature(°F)
4.0
Outdoor unit current (A)
45Hz
3.0
2.0
15 20 25 30 35 40 45 50 55 60 65 70 75
Ambient temperature(°F)
48
(°F)
6. 15-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA )
1
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High speed and continues for 30 minutes.
5.T o cancel this operation, press emergency run ON/OFF button
or any button on remote controller.
(PSIG)
170
6.0
160
Indoor DB temperature(
150
140
Outdoor low pressure
130
120
65 70 75 80 85 90 95 100105 110 115
Ambient temperature(°F)
(2) HEAT operation
1Data is based on the condition of outdoor
humidity 75%
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
°F)
33Hz
86
5.0
4.0
80
3.0
75
2.0
Outdoor unit current (A)
70
1.0
0.0
(°F)
65 70 75 80 85 90 95 100 105 110 115
7.0
6.0
5.0
Indoor DB temperature(
Ambient temperature(°F)
°F)
33Hz
°F)
86
80
75
70
(°F)
75
70
65
Indoor DB temperature(
4.0
Outdoor unit current (A)
3.0
2.0
15 20 25 30 35 40 45 50 55 60 65 70 75
Ambient temperature(°F)
49
45Hz
(°F)
7. 17-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA )
65 70 75 80 85 90 95 100105 110 115
120
130
140
150
160
170
Ambient temperature(°F)
(°F)
86
80
75
70
86
80
75
70
15 20 25 30 35 40 45 50 55 60 65 70 75
2.0
3.0
4.0
5.0
6.0
7.0
Ambient temperature(°F)
65 70 75 80 85 90 95 100 105 110 115
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Ambient temperature(°F)
(°F)
(°F)
(PSIG)
Outdoor low pressure
Outdoor unit current (A)
Outdoor unit current (A)
45Hz
33Hz
33Hz
65
70
75
Indoor DB temperature(
°F)
Indoor DB temperature(
°F)
Indoor DB temperature(
°F)
1
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High 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
1Data is based on the condition of outdoor
humidity 75%.
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
50
8. 24-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA )
1
(1) COOL operation
1Data is based on the condition of indoor
humidity 50%
2Air flow speed : High
3Inverter output frequency : 33Hz
<How to work fixed-frequency operation>
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 33Hz (COOL) or 45Hz (HEAT).
4.Indoor fan runs at High speed and continues for 30 minutes.
5.To cancel this operation, press emergency run ON/OFF button
or any button on remote controller.
(PSIG)
86
7.0
6.0
180
170
°F)
Indoor DB temperature(
5.0
160
80
°F)
4.0
150
Outdoor low pressure
140
130
65 70 75 80 85 90 95 100 105 110 115
33Hz
75
3.0
Outdoor unit current (A)
70
2.0
1.0
(°F)
65 70 75 80 85 90 95 100 105 110 115
Indoor DB temperature(
33Hz
86
80
75
70
(°F)
Ambient temperature(°F)
(2) HEAT operation
1Data is based on the condition of outdoor
humidity 75%
2Set air flow to High speed.
3Inverter output frequency is 45Hz.
Ambient temperature(°F)
7.0
6.0
5.0
4.0
Indoor DB temperature(°F)
Outdoor unit current (A)
45Hz
3.0
2.0
15 20 25 30 35 40 45 50 55 60 65 70 75
Ambient temperature(°F)
75
70
65
(°F)
51
9
ACTUATOR CONTROL
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA
11
Relation between main sensor and actuator
Sensor
Discharge temperature thermistor
Indoor coil thermistor
Defrost thermistor
Gas pipe temperature thermistor
(MXZ-2A20NA, MXZ-3A30NA)
Fin temperature thermistor
Ambient temperature thermistor
Outdoor heat exchanger temperature
Capacity code
10
SERVICE FUNCTIONS
Purpose
Protection
Defrosting Protection
Defrosting
Control
Protection
Control
Protection
Control
Compressor LEV
Actuator
Outdoor
fan motor
4-way
valve
10-1. Pre-heat control <MXZ-2A20NA - , MXZ-3A30NA - , MXZ-4A36NA >
11
If moisture gets into the refrigerant cycle, or when refrigerant is liquefied and collected in the compressor, it may interfere
the start-up of the compressor.
To improve start-up condition, the compressor is energized even while it is not operating.
This is to generate heat at the winding.
The compressor uses about 50 W when pre-heat control is turned ON.
Pre-heat control is ON at initial setting.
[How to deactivate pre-heat control]
1 Turn OFF the power supply for the air conditioner before making the setting.
2 Set the 4th Dip Switch of SW1 on the outdoor electronic control P.C. board to ON to deactivate pre-heat control func-
tion (MXZ-2A20NA - ).
1
Set the 4th Dip Switch of SW2 on the outdoor electronic control P.C. board to ON to deactivate pre-heat control function (MXZ-3A30NA - , MXZ-4A36NA).
SW1
ON
1234
SW1
ON
1234
1
MXZ-2A20NA -
SW2
ON
123456
SW2
SW1
SW871
1
SW2
ON
123456
MXZ-3A30NA MXZ-4A36NA
1
3 Turn ON the power supply for the air conditioner.
NOTE: Pre-heat control will be turned OFF when the breaker is turned OFF.
52
10-2. Auto line correcting <MXZ-3A30NA - , MXZ-4A36NA >
1
Outdoor unit has an auto line correcting function which automatically
detects and corrects improper wiring or piping.
Improper wiring or piping can be automatically detected by pressing the piping/wiring correction switch (SW871).
When improper wiring or piping is detected, wiring lines are corrected.
This will be completed in about 10 to 15 minutes.
[How to activate this function]
1. Check that outside temperature is above 0:.
(This function does not work when outside temperature is not above 0:.)
2. Check that the stop valves of the liquid pipe and gas pipe are open.
SW871
3. Check that the wiring between indoor and outdoor unit is correct.
(If the wiring is not correct, this function does not work.)
4. Turn ON the power supply and wait at least 1 minute.
5. Press the piping/wiring correction switch (SW871) on the electronic control P.C. board.
Do not touch energized parts.
LED indication during detection:
LED1(Red)
Lighting
LED2(Yellow)
Lighting
LED3(Green)
Blinking
LED indication after detection:
LED1(Red)
Lighting
Blinking
LED2(Yellow)
Goes out
Blinking
Other indications
LED3(Green)
Lighting
Blinking
Completed (Detected successfully)
Cannot be corrected
Refer to "SAFETY PRECAUTIONS WHEN LED FLASHES"
located behind the service panel.
Indication
W Be sure to check for closed valves, cracked pipes or clogged pipes.
6. Press the switch to cancel.
LED indication after cancel :
LED1(Red)
Lighting
LED2(Yellow)
Lighting
LED3(Green)
Goes out
SW871
NOTE : Indoor unit cannot be operated while this function is activated.
When this function is activated while indoor unit is operating, the operation will be stopped.
Operate indoor unit after the auto line correcting is finished.
Pressing the switch during detection cancels this function.
The record of auto line correcting can be confirmed in the following way:
Press the switch for more than 5 seconds.
LED will show the record of auto correcting for about 30 seconds as shown in the table below:
LED1(Red)
Once
3 times
Number of blinks
LED2(Yellow)
Once
3 times
LED3(Green)
Lighting
Lighting
Wiring line
Not corrected
Corrected
NOTE : Activate this function to confirm the correct wiring after replacing the electronic control P.C. board.
(Previous records are deleted when the electronic control P.C. board is replaced.)
The record cannot be shown if auto line correcting is not canceled (Refer to "How to activate this function").
53
11
Lead wiring
Housing point
TROUBLESHOOTING
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA
11
11-1. 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 of the following during servicing.
1) Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after confirming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.
2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic
control P.C. board.
3) When removing the electrical parts, be careful to the residual voltage of smoothing capacitor.
4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
5) 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 seems to be defective, check the copper foil pattern for disconnection and the com-
ponents for bursting and discoloration.
3) When troubleshooting, refer to 11-2, and 11-3. and 11-4.
11-2. Failure mode recall function
This air conditioner can memorize the abnormal condition which has occurred once.
Even though LED indication listed on the troubleshooting check table (11-4.) disappears, the memorized failure details
can be recalled.
This mode is very useful when the unit needs to be repaired for the abnormality which doesn’t recur.
1. Type of failure mode recall function
There are 2 types in failure mode recall function as shown below.
1Indoor and outdoor unit failure mode recall function
With this function, failure mode of indoor unit and a part of failure mode of outdoor unit can be recalled.
2The details of outdoor unit failure mode recall function
With this function, more detailed failure mode of outdoor unit can be recalled.
Refer to the service manual of indoor unit for how to recall the failure mode and the details of indoor unit failure mode.
The outdoor unit failure mode is indicated by the operation indicator lamp on the indoor unit and the LED of outdoor unit.
See "11-2.2. Failure mode table".
54
2. Outdoor unit failure mode table
The left lamp of
OPERATION INDICATOR
lamp (Indoor unit)
OFF
2-time flash
3-time flash
4-time flash
5-time flash
6-time flash
7-time flash
8-time flash
9-time flash
10-time flash
(Failure mode / protection)
Outdoor power system
Discharge temperature
thermistor
Defrost thermistor
Ambient temperature thermistor
Fin temperature thermistor
P.C. board temperature
thermistor
Outdoor heat exchanger
temperature thermistor
Gas pipe temperature
thermistor A
Gas pipe temperature
thermistor B
Gas pipe temperature
thermistor C
Overcurrent
Discharge temperature
High pressure
Fin temperature
P.C. board temperature
Outdoor fan motor
Nonvolatile memory data
Discharge temperature
Abnormal point
None (Normal)
LED indication
(Outdoor P.C. board)
LED 1 LED 2
--
Lighting Lighting
Lighting Once
Lighting Once
Lighting Twice
Lighting 3 times
Lighting 4 times
Lighting
9 times
Lighting 10 times
Lighting 11 times
12 times
Lighting
Once
Goes out
Lighting
Lighting
Lighting
Lighting
3 times
4 times Goes
Lighting
Lighting
Lighting
Goes
out
out
Lighting
5 times
Lighting
Condition
When overcurrent protection stop is
continuously performed three times
within 1 minute after the compressor
gets started, or when converter
protection stop or bus-bar voltage
protection stop is continuously
performed three times within 3
minutes after start-up.
When thermistor shorts or opens
during compressor running.
When a short or open circuit is
detected in the thermistor during
cooling.
(A,B: MXZ-2A20NA, MXZ-3A30NA)
(C : MXZ-3A30NA)
When 28A current flows into intelligent
power module.
When discharge temperature exceeds
240.8˚F during operation.
Compressor can restart if discharge
temperature thermistor reads 212˚F or
less 3 minutes later.
When high-pressure is detected
with the high-pressure switch
(HPS) during operation.
(MXZ-3A30NA,MXZ-3A30NA-
When the outdoor heat exchanger
temperature exceeds 158˚F
during cooling or the indoor gas
pipe temperature exceeds 158˚F
during heating.
When the fin temperature exceeds
188.6˚F during operation.
When the P.C. board temperature
exceeds 158˚F during operation.
When failure occurs continuously
three times within 30 seconds after
the fan gets started.
When nonvolatile memory data
cannot be read properly.
When the frequency of the
compressor is kept 80Hz or
more and the discharge
temperature is kept under 102.2˚F
for more than 20 minutes.
1
, MXZ-4A36NA)
Correspondence
• Check the connection
of the compressor
connecting wire.
• Refer to 11-6.E
"How to check
inverter / compressor".
• Check the stop valve.
• Refer to 11-6.F "Check
of outdoor thermistors".
• Replace the outdoor
electronic control
P.C. board.
• Refer to 11-6.F "Check
of outdoor thermistors".
• Reconnect compressor
connector.
• Refer to 11-6.E "How to
check inverter/
compressor".
• Check the stop valve.
•Check refrigerant circuit
and refrigerant amount.
• Refer to 11-6.D "Check
of LEV".
•Check refrigerant circuit
and refrigerant amount.
• Check the stop valve.
• Check around outdoor
unit.
• Check outdoor unit air
passage.
• Refer to 11-6.G "Check
of outdoor fan motor".
• Refer to 11-6.G "Check
of outdoor fan motor".
• Replace the outdoor
electronic control
P.C. board.
•Check refrigerant circuit
and refrigerant amount.
• Refer to 11-6.D "Check
of LEV".
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4.).
Indoor/outdoor
unit failure mode
recall function
55
Operation start
Check the outdoor unit
LED indicator.
Refer to 11-6.
A "Check of power supply".
• Indoor unit
serial signal
error
Refer to 11-6.
B "How to
check
mis-wiring and
serial signal
error".
• COOL or
HEAT
operation only
Refer to 11-6.
C "Check of
R.V. coil".
• When cooling,
room is not
cool.
Refer to 11-6.E
"How to check
inverter/
compressor".
• When cooling, heat
exchanger of
non-operating indoor
unit frosts.
•When heating, nonoperating indoor unit
gets warm.
Refer to 11-6.
D "Check of LEV".
• When cooling,
dew drops in the
non-operating
indoor unit.
Check of mispiping
• When heating,
room does not get
warm.
Refer to 11-6.E
"How to check
inverter/ compressor".
Check mis-piping,
shortage of capacity.
Refer to 11-4.
"Troubleshooting check table".
OFF
Both LED 1 and
LED 2 lighting
LED 1 or LED 2
has blinked.
11-time flash
15-time flash
• Check the connecting
wire between outdoor
electronic control
P.C. board and power
board.
• Replace the power
board.
• Check the connecting
wire among electronic
control P.C. board,
noise filter P.C. board
and power board.
• Replace the power
board.
• Refer to 11-6.D "Check
of LEV".
• Check the drain pump of
the indoor unit.
When the communication between
boards protection stop is
continuously performed twice.
Communication error occurs
between the electronic control P.C.
board and power board for more
than 10 seconds.
Current sensor protection stop is
continuously performed twice.
When a short or open circuit is
detected in the current sensor
during compressor operating.
The protection stop of the zero
cross detecting circuit is
continuously performed 10 times.
When zero cross signal cannot be
detected while the compressor is
operating.
When a failure is detected in the
operation of the converter during
operation.
When the bus-bar voltage exceeds
400V or falls to 200V or below
during compressor operating.
When the bus-bar voltage exceeds
400V or falls to 50V or below during
compressor operating.
Communication error
between P.C. boards
Current sensor
Zero cross detecting circuit
Converter
Bus-bar voltage
(1)
Bus-bar voltage
(2)
wEven if this protection stop is
performed continuously three
times, it does not mean the
abnormality in outdoor power
system.
LEV for drain
Lighting 6 times
Lighting 7 times
5 times Goes
out
5 times
Goes
out
5 times
6 times
Goes
out
Goes
out
When the indoor unit detects any
abnormal in the LEV for drain.
Lighting
Lighting
Abnormal point
(Failure mode / protection)
Condition
Correspondence
Indoor/outdoor
unit failure mode
recall function
LED indication
(Outdoor P.C. board)
LED 1 LED 2
The left lamp of
OPERATION INDICATOR
lamp(Indoor unit)
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4.).
11-3. Instruction of troubleshooting
• 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.
56
11-4. Troubleshooting check table
LED2
LED1
Outdoor electronic control P.C. board (Parts side)
Lighting
LED1
LED2
Lighting
LED1(Red) LED2(Yellow)
Lighting Twice Outdoor power system
• Check the connection of the compressor connecting
wire.
• Refer to 11-6.
E "How to check inverter/compressor".
• Check the stop valve.
Lighting 3 times
Discharge temperature
thermistor
• Refer to 11-6.
F "Check of outdoor thermistors".
• Refer to 11-6.
F "Check of outdoor thermistors".
Outdoor heat exchanger
temperature thermistor
Defrost thermistor
Lighting 7 times Nonvolatile memory data • Replace the outdoor electronic control P.C. board.
Lighting 8 times Current sensor • Replace the power board.
Lighting 11 times
Communication error
between P.C. boards
• Check the connecting wire between outdoor electronic control
P.C. board and power board.
Lighting 12 times
Zero cross detecting
circuit
• Check the connecting wire among outdoor electronic control
P.C. board, noise filter P.C. board and power board.
Abnormal point / Condition Correspondence
When a short circuit is detected in the thermistor during operation, or
when an open circuit is detected in the thermistor after 5 minutes (in
cooling) and 10 minutes (in heating) of compressor start-up.
When a short circuit is detected in the thermistor during operation, or
when an open circuit is detected in the thermistor after 5 minutes of
compressor start-up.
• Refer to 11-6.
F "Check of outdoor thermistors".
• Replace the outdoor electronic control P.C. board.
Indication
When over current protection stop is continuously performed three times
within 1 minute after the compressor gets started, or when converter
protection stop or bus-bar voltage protection stop is continuously performed
three times within 3 minutes after start-up.
When a short circuit is detected in the thermistor during operation, or
when an open circuit is detected in the thermistor after 10 minutes
of compressor start-up.
Condition
When the nonvolatile memory data cannot be read properly.
Fin temperature
thermistor
P.C board temperature
thermistor
Lighting 4 times
Ambient temperature
thermistor
Current sensor protection stop is continuously performed twice.
When the communication protection stop between boards is
continuously performed twice.
The protection stop of the zero cross detecting circuit is continuously
performed 10 times.
When a short or open circuit is detected in the thermistor during
operation.
When a short or open circuit is detected in the thermistor during
operation.
5 timesLighting
IPM protection
Lock protection
3 times Goes out
Discharge temperature
protection
• Check the amount of gas and refrigerant circuit.
• Refer to 11-6.
D "Check of LEV".
Fin temperature
protection
P.C. board temperature
protection
High-pressure
protection
8 times Goes out
Converter protection
• Replace the power board.
Bus-bar voltage
protection (1)
• Replace the power board.
Bus-bar voltage
protection (2)
13 times Goes out Outdoor fan motor • Refer to 11-6.
G "Check of outdoor fan motor".
Lighting 8 times
Current sensor
protection
• Replace the power board.
Lighting 11 times
Communication between P.C.
boards protection
• Check the connecting wire between outdoor electronic control
P.C. board and power board.
Lighting 12 times
Zero cross detecting circuit
protection
• Check the connecting wire among outdoor electronic control
P.C. board, noise filter P.C. board and power board.
•Check refrigerant circuit and refrigerant amount.
•Refer to 11-6.
G "Check of outdoor fan motor".
• Check around of gas and the refrigerant circuit.
• Check of stop valve.
• Reconnect compressor connector.
• Refer to 11-6.
E "How to check inverter/compressor".
• Check the stop valve.
• Check the power module (PAM module).
Twice Goes out
4 times Goes out
5 times Goes out
9 times Goes out
When overcurrent is detected after 30 minutes of compressor start-up.
When overcurrent is detected within 30 minutes of compressor
start-up
When the bus-bar voltage exceeds 400V or falls to 200V or below
during compressor operating.
When the bus-bar voltage exceeds 400V or falls to 50V or below
during compressor operating.
When discharge temperature exceeds 240.8˚F during operation. Compressor
can restart if discharge temperature thermistor reads 212˚F or less 3
minutes later.
When the fin temperature exceeds 188.6˚F during operation.
When the P.C. board temperature exceeds 158˚F during operation.
When high-pressure is detected with the high-pressure switch (HPS)
during operation. (MXZ-3A30NA , MXZ-3A30NA -
1
, MXZ-4A36NA)
When failure occurs continuously three times within 30 seconds after
the fan gets started.
When a short or open circuit is detected in the current sensor during
compressor operating.
Communication error occurs between the outdoor electronic control P.C.
board and power board for more than 10 seconds.
When zero cross signal cannot be detected while the compressor is
operating.
When the outdoor heat exchanger temperature exceeds 158˚F
during cooling or when indoor gas pipe temperature exceeds 158˚F
during heating.
When a failure is detected in the operation of the converter during
operation.
Outdoor unit
does not
operate.
Lighting Once LEV for drain
• Refer to 11-6.
D "Check of LEV".
• Check the drain pump of the indoor unit.
When the indoor unit detects any abnormality in the LEV for drain.
• Refer to 11-6.
F "Check of outdoor thermistors".
Lighting
10 times
Gas pipe temperature
thermistor A
Gas pipe temperature
thermistor B
Gas pipe temperature
thermistor C
When a short or open circuit is detected in the thermistor during
cooling.
(A,B : MXZ-2A20NA, MXZ-3A30NA)
(C : MXZ-3A30NA)
No.
1
2
3
4
5
6
7
8
10
9
11
12
13
14
15
16
17
18
19
20
Symptom
'Outdoor unit
stops and
restarts 3
minutes
later' is
repeated.
MXZ-2A20NA, MXZ-2A20NA-
1
, MXZ-3A30NA
MXZ-3A30NA-
1 ,
MXZ-4A36NA
NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.
2. LED is lighted during normal operation.
The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.
(Example) When the flashing frequency is “2”.
ON
2.5-second OFF
OFF
0.5-second ON
2.5-second OFF
57
0.5-second ON
Primary current protection
Secondary current protection
High-pressure protection
Defrosting in cooling
3 times
Lighting
Discharge temperature
protection
• Check refrigerant circuit and refrigerant amount.
• Refer to 11-6.
D
"Check of LEV".
• Refer to 11-6.
F
"Check of outdoor thermistors".
4 times
Lighting
Low discharge
temperature protection
• Refer to 11-6.
D
"Check of LEV".
• Check refrigerant circuit and refrigerant amount.
5 times
Lighting
Cooling high-pressure
protection
This symptom does not mean any abnormality of the
product, but check the following points.
• Check if indoor filters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circulation is short cycled.
-
-
These symptoms do not mean any abnormality of the
product, but check the following points.
• Check if indoor filters are clogged.
• Check if refrigerant is short.
• Check if indoor/outdoor unit air circulation is short cycled.
Twice Lighting
Once Lighting
When the frequency of the compressor is kept 80Hz or more and
the discharge temperature is kept under 122˚F(COOL mode)
/104˚F(HEAT mode) for more than 40 minutes.
When the frequency of the compressor is kept 80Hz or more and
the discharge temperature is kept under 102.2˚F for more than 20
minutes.
When the outdoor heat exchanger temperature exceeds 136.4˚F
during operation.
9 times
Lighting
Inverter check mode
Lighting
Lighting
Normal
When the unit is operated with emergency operation switch.
-
When the input current exceeds 15A.
When the current of the compressor exceeds 15A.
When the indoor gas pipe temperature exceeds
113˚F
during heating.
When the indoor gas pipe temperature falls 37.4
˚F
or below during cooling.
Outdoor electronic control P.C. board(Parts side)
LED2
LED1
Lighting
LED1
LED2
Lighting
MXZ-2A20NA, MXZ-2A20NA-
1
, MXZ-3A30NA
MXZ-3A30NA-
1 ,
MXZ-4A36NA
LED1(Red) LED2(Yellow)
Abnormal point / Condition Correspondence
Indication
Condition
Outdoor unit
operates.
Outdoor unit
operates
normally.
No.
Symptom
21
22
23
24
25
26
27
NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.
2. LED is lighted during normal operation.
The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.
(Example) When the flashing frequency is “2”.
ON
2.5-second OFF
OFF
0.5-second ON
0.5-second ON
2.5-second OFF
58
11-5. Trouble criterion of main parts
W
U
V
WHT
RED
BLK
LEV
WHT
U
RED
WHT
BLK
V
W
(W)
(V)
(U)
RED
YLW
BRN
ORN
BLU
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA
Part name Check method and criterion
Defrost thermistor
(RT61)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Gas pipe temperature
thermistor (RT6A~C)
MXZ-2A20NA
MXZ-3A30NA
Measure the resistance with a tester.
Refer to 11-7. “Test point diagram and voltage”,1. “Outdoor electronic control P.C.
board”, the chart of thermistor.
11
Discharge temperature
thermistor (RT62)
Fin temperature
thermistor (RT64)
Compressor
Outdoor fan motor
R.V. coil
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Refer to 11-7. “Test point diagram and voltage”,1. “Outdoor electronic control P.C.
board”, the chart of thermistor.
Measure the resistance between terminals using a tester.
(Winding temperature : 14˚F ~ 104˚F)
Normal (Each phase)
MXZ-2A20NA
MXZ-2A20NA
1
-
MXZ-3A30NA
MXZ-3A30NA -
MXZ-4A36NA
1
0.39"~ 0.49" 0.86"~ 1.06" 1.29"~ 1.49"
Measure the resistance between lead wires using a tester.
(Part temperature : 14˚F ~ 104˚F)
Normal (Each phase)
13.4" ~ 16.4"
Measure the resistance using a tester. (Part temperature : 14˚F ~ 104˚F)
Normal
1.2k" ~ 1.56k"
Linear expansion valve
High pressure switch
(HPS)
MXZ-3A30NA
MXZ-3A30NA -
MXZ-4A36NA
Measure the resistance using a tester.(Part temperature : 14˚F ~ 104˚F)
Color of lead wire
Normal
WHT - RED
RED - ORN
YLW - BRN
37.4" ~ 53.9"
BRN - BLU
Pressure Normal
1
HPS
537 ± 22 PSIG
+7
696 PSIG
- 15
Close
Open
59
Turn ON the power supply.
No
Yes
Yes
No
Yes
No
Yes
No
Replace the power board.
Check the connecting of parts of main power supply circuit.
Is there voltage of 208/230V AC in the
power supply terminal block?
Is the output voltage from the noise
filter P.C. board 208/230V AC?
Is the input voltage to the outdoor
electronic control P.C. board 294/325V DC?
Check the power supply cable.
Replace the outdoor electronic control
P.C. board.
Replace the noise
filter P.C. board.
Is the input voltage to the power board
208/230V AC?
Replace the reactor.
11-6. Troubleshooting flow
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA
Outdoor unit does not operate. (LED display: display OFF)
AA
Check of power supply
11
60
Is there rated voltage in
the power supply?
Is there any mis-wiring,
poor contact, or wire
disconnection of the
indoor/outdoor
connecting wire?
W1 Mis-wiring may damage indoor electronic control
P.C. board during the operation.
Be sure to confirm the wiring is correct before the
operation starts.
(Lighted
or
not lighted)
No
Yes
No
Yes
Yes
No
Yes
No
Yes
W2 Be careful to the residual
voltage of smoothing capacitor.
Be sure to release the failure-mode
recall function after checking.
No
No
Yes
No
Yes
Yes
Yes
No
Yes
Refer to indoor unit service manual.
Turn OFF the power supply.
Turn ON the power supply.
Is there rated voltage between
outdoor terminal block S1 and
S2?
Does the left lamp of OPERATION
INDICATOR lamp light up?
<Confirmation of the power to the indoor unit>
Press EMERGENCY OPERATION switch once.
Check the power
supply.
A
Turn OFF the power supply.
Check once more if the indoor/outdoor
connecting wire is not mis-wiring.
Short-circuit outdoor terminal block S2 and
S3.
W1
B
Turn ON the power supply.
Check the wiring.
Correct them.
Turn OFF the power supply.
Remove the short-circuit between
outdoor terminal block S2 and S3.
Turn ON the power supply.
Is there amplitude of 10 to 20V DC
between outdoor terminal block S2
and S3? <Confirmation of serial
signal>
Is there rated voltage between
indoor terminal block S1 and S2?
<Confirmation of power voltage>
Replace the indoor electronic control P.C. board.
Replace the outdoor electronic control
P.C. board.
W2
Is there any error of the
indoor/outdoor connecting wire,
such as the damage of the wire,
intermediate connection, poor
contact to the terminal block?
Is there any error of the
indoor/outdoor connecting wire,
such as the damage of the wire,
intermediate connection, poor
contact to the terminal block?
No
Replace the
indoor/outdoor
connecting wire.
Replace the
indoor/outdoor
connecting wire.
Is serial signal
error indicated
6 minutes later?
Yes
No
· Turn OFF inverter-controlled lighting
equipment.
· Turn OFF the power supply and then
turn ON again.
· Press EMERGENCY OPERATION
switch.
B
· Reinstall
either the
unit or the
light each
other away.
· Attach a filter
on remote
control
receiving
section of
the indoor
unit.
A
Is serial signal error indicated 6 minutes later?
No
Does the LED on the outdoor electronic
control P.C. board repeat "3.6-second-OFF
and 0.8-second-ON quick blinking"?
MXZ-3A30NA MXZ-4A36NA
MXZ-2A20NA
MXZ-2A20NA MXZ-3A30NA
1
1
LED indication
for communication status
Communication status is indicated
by the LED.
Blinking: normal communication
Lighting: abnormal communication or
not connected
Pattern 1 and 2 is repeatedly displayed
alternately. Each pattern is displayed for
15 seconds.
NOTE: "Lighting" in the table below does not
indicate abnormal communication.
Outdoor electronic control P.C. board
Blinking
LED 3
Lighting
Goes out
LED 1LED 2
(Parts side)
LED3 LED2
LED1
Outdoor electronic control P.C. board
Blinking
(Parts side)
LED1 LED2
LED3
Unit status
Pattern
1
2
Unit B
status
Lighting
Unit A
status
Unit C
status
LED 1 LED 3LED 2
Pattern
1
2
Unit B
status
Unit A
status
Unit D
status
Unit C
status
Goes out
Lighting
• When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch.
Indoor unit does not operate.
• When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.
Outdoor unit does not operate.
BB
How to check mis-wiring and serial signal error
61
The cooling operation or heating operation does not operate. (LED display: Both LED1 and LED2 lighting)
CN912
CN781
Noise filter P.C. board
Outdoor electronic control
P.C. board
CC
Check of R.V. coil
• When heating operation does not work.
1. Disconnect the lead wire leading to the compressor.
2. 3 minutes after turning ON the power supply, start EMERGENCY
OPERATION in HEAT mode.
Is there voltage of 208/230V AC between pin1
and pin 2 at connector CN912?
Yes
Turn OFF the power supply of indoor and outdoor unit.
Disconnect the connector
CN912. Is there normal
resistance to R.V. coil?
Yes
Replace the 4-way valve.
• When cooling operation does not work.
1. Disconnect the lead wire leading to the compressor.
2. 3 minutes after turning ON the power supply, start EMERGENCY
OPERATION in COOL mode.
Is there voltage of 208/230V AC between pin1
and pin 2 at connector CN912? W
Yes
No
Replace the R.V. coil.
W If the connector CN912 is not connected or R.V. coil is open, voltage
occurs between terminals even when the control is OFF.
No
No
1. Turn OFF the power supply of indoor and outdoor unit, and
disconnect the connector CN781.
2. 3 minutes after turning ON the power supply, start
EMERGENCY OPERATION in HEAT mode.
Is there voltage of 12V DC
between the connector
CN781 pin 5 (+) and pin 3 (-) ?
Replace the power P.C. board or
the noise filter P.C. board.
Replace the 4-way valve.
Yes
No
Replace the outdoor
electronic control P.C.
board.
1. Turn OFF the power supply of the indoor and the outdoor unit,
and disconnect the connector CN781.
2. 3 minutes after turning ON the power supply, start
EMERGENCY OPERATION in COOL mode.
Is there voltage of 12V DC
between the connector CN781
pin 5 (+) and pin 3 (-) ?
Yes
Replace the outdoor electronic control P.C. board.
No
Replace the noise filter P.C. board.
62
• When cooling, heat exchanger of non-operating indoor unit frosts.
• When heating, non-operating indoor unit get warm.
DD
Check of LEV
Turn ON the 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 LEV coil with your hand?
No
Disconnect the connectors.
CN791: LEV A, CN792: LEV B, CN793: LEV C,
CN794 : LEV D, CN795: LEV E, CN796: LEV F
Is there normal resistance to LEV coil?
No
Replace LEV coil.
Yes
Yes
Normal
Replace the outdoor electronic control P.C. board.
63
• When heating, room does not get warm.
No
No
Yes
Yes
Yes
No
Yes
No
Disconnect the terminal of the compressor.
3 minutes after turning ON the power supply, start
EMERGENCY OPERATION.
Is output balanced?
Clarify the causes by counting time until the inverter stops.
0 to 10 seconds: compressor layer short
10 to 60 seconds: compressor lock
60 seconds to 5minutes: refrigerant circuit defective
5 minutes or more: normal
Measure the voltage between each
lead wire leading to the compressor.
U (BLK) - V (WHT)
V (WHT) - W (RED)
W (RED) - U (BLK)
Output voltage
COOL: 150V(48Hz) HEAT: 170V(64Hz)
Is voltage output? W1, W2
Turn OFF the power supply of indoor and
outdoor unit, and measure the compressor
winding resistance between the compressor
terminals.
Is the resistance between each terminal normal?
Is the input voltage to the outdoor electronic
control P.C. board 370V or more?
Reconnect the lead wire of compressor, and turn ON
the power supply to indoor and outdoor unit.
3 minutes later, start EMERGENCY OPERATION.
Replace the
compressor.
Replace the power board.
W1 • After the outdoor fan starts running, wait for 1 minute
or more before measuring the voltage.
•The output voltage values have the tolerance of i20%.
W2 • The output differs depending on the capacity or the
number of indoor units to be operated.
• When cooling, room does not get cool.
EE
How to check inverter/ compressor
64
• When thermistor is abnormal.
Thermistor
Defrost
Discharge temperature
Outdoor heat exchanger temperature
Gas pipe temperature (Unit A) w
Gas pipe temperature (Unit B) w
Gas pipe temperature (Unit C) w
Ambient temperature
Fin temperature
w Except MXZ-2A20NA - , MXZ-3A30NA - and MXZ-4A36NA.
Symbol
RT61
RT62
RT68
RT6A
RT6B
RT6C
RT65
RT64
Connector, Pin No.
Between CN661 pin1 and pin2
Between CN661 pin3 and pin4
Between CN661 pin7 and pin8
Between CN662 pin1 and pin2
Between CN662 pin3 and pin4
Between CN662 pin5 and pin6
Between CN663 pin1 and pin2
Between CN3 pin1 and pin2
Outdoor electronic control P.C. board
Outdoor power board
Board
1
1
Yes
Yes
Yes
No
(Fixed to either 5V or 0V DC)
No
No
Check the connection between the
connectors CN931 and CN932.
Disconnect CN932 from outdoor electronic control P.C. board, and
turn ON the power supply.
Rotate the outdoor fan motor manually and measure the voltage of
CN931.
Between 1(+) and 5(-)
Between 2(+) and 5(-)
Between 3(+) and 5(-)
Is the resistance between each terminal
of outdoor fan motor normal?
Does the outdoor fan motor rotate smoothly?
Does the voltage between each terminal become 5V DC and 0V DC
repeatedly?
Replace the outdoor DC fan motor.
Replace the outdoor electronic control P.C. board.
Normal
Yes
No
Abnormal
Reconnect the connector in the following table and
disconnect the lead wire leading to the compressor.
3 minutes after turning ON the power supply,
start EMERGENCY OPERATION.
Disconnect the connector in the following table and
measure the resistance of the thermistor to check
whether the thermistor is normal or not.
Does the unit operate 10 minutes or more without
showing thermistor abnormality?
Replace the thermistor except RT64.
In case that RT64 is abnormal, replace the
outdoor power board since RT64 is combined
with the outdoor power board.
Normal
Replace the outdoor electronic control
P.C. board or the outdoor power board.
FF
Check of outdoor thermistors
• Fan motor does not operate or stops operating shortly after starting the operation.
GG
Check of outdoor fan motor
65
Infinity
0 "
No
Yes
1. Disconnect the connector CN681 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 CN681.
Turn ON the power supply to the indoor and outdoor unit.
3 minutes later, start EMERGENCY OPERATION.
Is HPS protection displayed
immediately after compressor
starts?
Replace HPS.
Replace the electronic control P.C. board.
Normal
• When the operation frequency does not go up from lowest frequency.
HH
Check of HPS
MXZ-3A30NA MXZ-3A30NA - MXZ-4A36NA
II
The other cases
Indoor unit does not operate. (different operating models in multi system)
• When you try to run two indoor units simultaneously, one for cooling and the other for heating, the unit which
transmits signal to the outdoor units earlier decides the operation mode.
• 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.
1
66
700
600
500
400
300
200
100
0
Resistance (k")
Temperature (˚F)
Discharge temperature thermistor (RT62)
32
50 68 86 104 122 140 158 176 194 212 230 248
-4 -14 32 50 68 86 104
100
90
80
70
60
50
40
30
20
10
0
200
180
160
140
120
100
80
60
40
20
0
Resistance (k")
Resistance (k")
Temperature (˚F)
Temperature (˚F)
32 50 68 86 104122 140158 176
w Except MXZ-2A20NA - .
1
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Gas pipe temperature thermistor (RT6A,6B,6C)w
Outdoor heat exchanger temperature
thermistor (RT68)
Fin temperature
thermistor (RT64)
11-7. Test point diagram and voltage
1. Outdoor electronic control P.C. board
CN931
Defrost thermistor (RT61)
(
1
Discharge temperature thermistor (RT62)
CN661
Outdoor heat exchanger
temperature thermistor (RT68)
thermistor (RT65)
(
(
(
CN663
CN701
Signal transmission
(To power board)
5V DC pulse wave
Ambient temperature
(
(–)
(+)
(+)
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA
To fan
motor
(
CN932
20-90V AC
(
5V DC
pulse wave
GND
5V
(
(From power board)
5V DC pulse wave
CN702
Signal reception
(
GND (power board)
(
GND
15V
15V
(–)
12V
DC
CN781
pulse wave
LEV E
Rush current relay
R.V. coil (–)
(
(+)
(+)
(–)
(
(
CN795
12V DC
(–)
LED 1
LED 2
LED 3
SW1
CN801
294V DC
~
370V DC
Input
F801
FUSE
T3.15AL250V
Gas pipe Athermistor w
CN662
CN681
(
(
(
Gas pipe B thermistor w
Gas pipe C thermistor w
(
High pressure switch
MXZ-3A30NA
(
(+)
pulse wave
LEV Room
C
67
(
(–)
(
12V DC
CN793
(+)
B
(
(
(–)
(
12V DC
pulse wave
LEV Room
CN792
(+)
A
(
(
(–)
(
12V DC
pulse wave
LEV Room
CN603
Serial signal Room C
12~24V DC
CN602
Serial signal Room B
12~24V DC
CN601
208/230V AC
Input
Serial signal
Room A
12~24V DC
CN791
MXZ-3A30NA - MXZ-4A36NA
0 102030405060708090100110120
700
600
500
400
300
200
100
0
Resistance (kΩ)
Temperature (:)
Discharge temperature thermistor (RT62)
-20 -10 0 10 20 30 40
100
90
80
70
60
50
40
30
20
10
0
0 1020304050607080
200
180
160
140
120
100
80
60
40
20
0
Resistance (kΩ)
Resistance (kΩ)
Temperature (:)
Temperature (:)
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger temperature thermistor (RT68)
Fin temperature thermistor (RT64)
1
To fan
motor
(
CN932
20-90V AC
(
LED 1
LED 2
LED 3
5V DC
pulse wave
5V DC
GND
(
Discharge temperature thermistor (RT62)
CN661
Outdoor heat exchanger
temperature thermistor (RT68)
CN663
Defrost thermistor (RT61)
Ambient temperature
thermistor (RT65)
CN701
CN702
Signal transmission
(To power board)
5V DC pulse wave
Signal reception
(From power board)
5V DC pulse wave
15V DC
CN781
Rush current relay
R.V. coil (–)
GND
GND
(–)
(+)
F931
FUSE
T3.15AL250V
SW1
SW2
SW871
CN801
294~370 V DC
Input
F801
FUSE
T3.15AL250V
CN681
High pressure switch
68
(
CN796
{
–
LEV F
12VDC
(
+
pulse wave
CN794
LEV Room D
CN793
LEV Room C
CN792
LEV Room B
CN791
LEV Room A
CN631
Serial signal Room D
12~24V DC
CN621
Serial signal Room C
12~24V DC
CN611
Serial signal Room B
12~24V DC
CN601
208/230V AC
Input
Serial signal
Room A
12~24V DC
2. Noise filter P.C. board
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA
CN912
R.V. coil
208/230V AC
208/230V AC
Output
CN901
To electronic
control
P.C. board
{
{
CN902
To power
board
1
CN903
To power
board
{
208/230V AC
Input
{
208/230V AC
Output
1
F64 FUSE
T2AL250V
CN901
To electronic
control
P.C. board
{
CN902
To power
board
NR64 VARISTOR
MXZ-3A30NA - MXZ-4A36NA
208/230V AC
Output
F64
FUSE
T2AL250V
F911 FUSE
T1AL250V
CN903
To power
board
{
CN912
R.V. coil
208/230V AC
{
208/230V AC
Output
F65
FUSE
T6.3AL250V
208/230V AC
Input
69
3. Outdoor Power board
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA -
11
MXZ-4A36NA
Connect to the compressor
Voltage among phases: 5V to
180V
294-370V DC
Output
(Red)
(+)
1
3
(–)
(White)
Connect to the earth
CN2
Connect to the controller board
(+)1-5(–): Signal transmission
(To electronic control P.C. board)
(+)2-5(–): Zero cross signal
3-4 : Not used
(+)6-5(–): 15V
(+)7-5(–): 15V
CN3
Fin temperature thermistor RT64
Signal reception (From
)
electronic control P.C. board)
5V DC pulse wave
CN5
Primary current detection
(Connect to the noise filter)
Connect to the compressor
Voltage among phases: 5V to 180V
5V DC pulse wave
294-370V DC
Output
(+)
(–)
(Red)
1
3
(White)
70
Connect to the earth
CN2
Connect to the controller board
(+)1-5(–): Signal transmission
(To electronic control P.C. board)
(+)2-5(–): Zero cross signal
(+)6-5(–): 15V
(+)7-5(–): 15V
CN3
Fin temperature thermistor RT64
Signal reception (From
)
electronic control P.C. board)
5V DC pulse wave
CN5
Primary current detection
(Connect to the noise filter)
5V DC pulse wave
3-4 : Not used
12
(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the
locking mechanism.
1Slide the sleeve.
2Pull the terminal while
pushing the locking
lever.
1Hold the sleeve, and
pull out the terminal
slowly.
The terminal which has the locking mechanism can be detached as shown below.
There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism.
The terminal without locking mechanism can be detached by pulling it out.
Check the shape of the terminal before detaching.
<"Terminal with locking mechanism" Detaching points>
Connector
Sleeve
Locking lever
DISASSEMBLY INSTRUCTIONS
12-1. MXZ-2A20NA MXZ-2A20NA -
1
OUTDOOR UNIT
OPERATING PROCEDURE
1. Removing the compressor
(1)Remove the screws of the top panel, and remove the top
panel.
(2)Remove the screws of the service panel, and remove the
service panel.
Recover refrigerant gas.
(3)Remove the screws of the cabinet, and remove the cabinet.
(4)Remove the screws of the back panel, and remove the back
panel (Photo 3).
(5)Disconnect the compressor lead wire from terminal of the
compressor (U, V, W).
(6)Disconnect the outdoor electronic control P.C. board
connectors:
CN661, CN662 (MXZ-2A20NA), CN663, CN791, CN792,
CN795, CN931, CN932
Disconnect the noise filter P.C. board connector:
CN912
(7)Remove the screws of the electrical parts, and remove the
electrical parts (Photo 4).
(8)Remove the propeller.
(9)Remove the screws of the separator, and remove the
separator (Photo 6).
(10)
Remove the sound proof felt (Photo 6).
(11)
Detach the welded parts of the compressor suction and dis-
charge pipes (Photo 5).
(12)
Remove the compressor nuts and remove the compressor.
Photo 1
Screws of the cabinet
Photo 2
Screws of the
top panel
PHOTOS
Screws of the
top panel
Screws of
the cabinet
Screws of
service
panel
Screw of
the cabinet
Screws of the cabinet
Screws of the
cabinet
71
OPERATING PROCEDURE
PHOTOS
Photo 5
R.V. coil
4-way valve
LEV coil E
Expansion valve E
Discharge
pipe welded part
Suction pipe
welded part
Photo 3
Screws of
the back panel
Screws of
the back panel
Photo 4
Screw of
the rear guard
Screws of
the back
panel
Compressor nuts
2. Removing the fan motor
(1)Remove the top panel, the service panel, and the cabinet
(Photo 1).
(2)Disconnect the connectors CN931 and CN932 on the outdoor
electronic control P.C. board.
(3)Remove the propeller.
(4)Remove the fan motor.
Screws of
the electrical
parts
Photo 6
Propeller
Propeller nut
Screws of the outdoor fan motor
Separator
Sound
proof
felt
72
OPERATING PROCEDURE PHOTOS
3. Removing the 4-way valve
(1)Remove the top panel (Photo 1).
(2)Remove the service panel, the cabinet and the back panel
(Photo 1, 2, 3).
Recover refrigerant gas.
(3)Remove the electrical parts (Photo 4).
(4)Detach the welded parts of 4-way valve and pipe.
4. Removing the expansion valve
(1)Remove the top panel (Photo 1).
(2)Remove the service panel, the cabinet and the back panel
(Photo 1, 2, 3).
(Gas recovery is not required if the unit is pumped down.)
(3)Remove the cabinet for removing LEV E (Photo 1, 2, 5).
(4)Remove the electrical parts for removing LEV E (Photo 4, 5).
(5)Remove the LEV coils.
(6)Detach the welded parts of expansion valves and pipes.
Photo 7
4-way valve
Photo 8
R.V. coil
Welded parts
5. Removing the reactor
(1)Remove the top panel (Photo 1).
(2)Remove the service panel, cabinet, back panel and the relay
panel.
(3)Disconnect the reactor lead wire from the terminal of the
reactor.
(4)Remove the screws of the reactor, and remove the reactor
(Photo 9).
LEV coils
Photo 9
Expansion
valves
73
Screws of the reactor
12-2. MXZ-3A30NA
OUTDOOR UNIT
OPERATING PROCEDURE
1. Removing the compressor
(1)Remove the screws of the top panel, and remove the top
panel (Photo 1).
(2)Remove the screws of the service panel, and remove the
service panel (Photo 1).
Recover refrigerant gas.
(3)Remove the screws of the front panel, and remove the front
panel.
(4)Disconnect the compressor lead wire from terminal of
compressor (U, V, W).
(5)Disconnect the outdoor electronic control P.C. board
connectors:
CN661, CN662 , CN663, CN681, CN791, CN792, CN793,
CN795, CN931, CN932
Disconnect the noise filter P.C. board connector:
CN912
(6)Remove the screws of the electrical parts, and remove the
electrical parts (Photo 2).
(7)Remove the propeller.
(8)Remove the screws of the separator, and remove the
separator.
(9)Remove the sound proof felt.
(10)
Detach the welded parts of the compressor suction and dis-
charge pipes (Photo 3).
(11)
Remove the compressor nuts and remove the compressor.
Photo 1
Screws of the front panel
Screws of the top panel
Photo 2
Screws
of the
electrical
parts
PHOTOS
Screws of
service
panel
74
Photo 3
LEV coil E
Expansion
valve E
Suction
pipe
welded
part
Discharge
pipe
welded
part
OPERATING PROCEDURE
PHOTOS
2. Removing the fan motor
(1)Remove the top panel, the service panel, and the front panel
(Photo 1).
(2)Disconnect the connectors CN931 and CN932 on the outdoor
electronic control P.C. board.
(3)Remove the propeller.
(4)Remove the fan motor.
3. Removing the 4-way valve
(1)Remove the top panel (Photo 1).
(2)Remove the service panel, rear panel, and pipe cover.
Recover refrigerant gas.
(3)Remove the electrical parts (Photo 2).
(4)Detach the welded parts of 4-way valve and pipe.
Photo 4
Screws of the outdoor fan motor
Propeller
Propeller nut
Photo 5
Separator
Sound
proof
felt
Compressor nuts
4 way valve
R.V. coil
4. Removing the expansion valve
(1)Remove the top panel (Photo 1).
(2)Remove the service panel (Photo 1).
(Gas recovery is not required if the unit is pumped down.)
(3)Remove the front panel for removing LEV E (Photo 1, 3).
(4)Remove the electrical parts for removing LEV E (Photo 2, 3).
(5)Remove the LEV coils.
(6)Detach the welded parts of expansion valves and pipes.
Photo 6
LEV coils
Welded parts
Expansion
valves
75
OPERATING PROCEDURE PHOTOS
5. Removing the reactor
(1)Remove the top panel (Photo 1).
(2)Disconnect the reactor lead wire.
(3)Remove the screws of the reactor, and remove the reactor.
Photo 7
Screws of the reactor
76
12-3. MXZ-3A30NA - MXZ-4A36NA
1
OUTDOOR UNIT
OPERATING PROCEDURE
Photo : MXZ-3A30NA -
PHOTOS
1
1. Removing the compressor
(1)Remove the screws of the top panel, and remove the top
panel.
(2)Remove the screws of the service panel, and remove the ser-
vice panel.
Recover refrigerant gas.
(3)Remove the screws of the front panel, and remove the front
panel.
(4)Remove the screws of the rear panel, and remove the rear
panel.
(5)Disconnect the compressor lead wire from terminal of
compressor (U, V, W).
(6)Disconnect the outdoor electronic control P.C. board
connectors:
CN661, CN663, CN681, CN791, CN792, CN793, CN794
(MXZ-4A36NA), CN796, CN931, CN932
Disconnect the noise filter P.C. board connector:
CN912
(7)Remove the screws of the electrical parts, and remove the
electrical parts.
(8)Remove the propeller.
(9)Remove the screws of the separator, and remove the
separator.
(
10
)Remove the sound proof felt (Photo 5).
(11)
Detach the welded parts of the compressor suction and discharge pipes (Photo 4).
(12)
Remove the compressor nuts and remove the compressor.
Photo 1
Screws of
the front panel
Photo 2
Screws of the top panel
Screws of
service
panel
Screws of the top panel
Screws of
the side panel
Photo 4
Suction pipe
welded part
Discharge pipe
welded part
Screws of
the service panel
Screws of rear panel
Photo 3
Screws of the electrical parts
77
Photo : MXZ-3A30NA -
1
OPERATING PROCEDURE
2. Removing the fan motor
(1)Remove the top panel, the service panel, and the front panel
(Photo 1, 2).
(2)Disconnect the connectors CN931 and CN932 on the outdoor
electronic control P.C. board.
(3)Remove the propeller.
(4)Remove the fan motor.
3. Removing the 4-way valve
(1)Remove the top panel (Photo 1, 2).
(2)Remove the service panel, rear panel, and pipe cover
(Photo 1,2).
Recover refrigerant gas.
(3)Remove the electrical parts (Photo 3).
(4)Detach the welded parts of 4-way valve and pipe.
Photo 5
Propeller
Propeller
nut
Separator
Photo 6
PHOTOS
Screws of the outdoor fan motor
Sound proof felt
4 way valve
R.V. coil
4. Removing the expansion valve
(1)Remove the top panel (Photo 1, 2).
(2)Remove the service panel (Photo 1, 2).
(Gas recovery is not required if the unit is pumped down.)
(3)Remove the front panel for removing LEV F (Photo 1).
(4)Remove the electrical parts for removing LEV F (Photo 3).
(5)Remove the LEV coils.
(6)Detach the welded parts of expansion valves and pipes.
78
Photo 7
LEV coils
LEV coil F
Welded parts
Expansion valve F
Expansion
valves
Photo : MXZ-3A30NA -
OPERATING PROCEDURE PHOTOS
1
5. Removing the reactor
(1)Remove the top panel (Photo 1, 2).
(2)Disconnect the reactor lead wire.
(3)Remove the screws of the reactor, and remove the reactor.
Photo 8
Screws of the reactor
79
13
PARTS LIST (non-RoHS compliant)
MXZ-2A20NA
13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
21
22
23
1
2
20
19
18
17
16
15
14
13
3
4 11
5 6 7 8 9 10 12
80
PARTS LIST (non-RoHS compliant)
MXZ-2A20NA
13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
Part numbers that are circled are not shown in the illustration.
Q'ty/unit
MXZ-2A20NA
1
1
1
1
3
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
8
2
1
1
Parts No. Parts Name
No.
1
E02 939 232
2
E02 817 009
3
E02 939 521
4
E02 B05 900
5
E02 065 506
E02 851 640
6
E02 939 493
E02 851 640
7
E02 938 493
8
E02 939 290
9
E02 939 666
10
E02 939 667
11
E02 939 233
12
E02 939 245
13
E02 B05 661
14
E02 939 662
15
E02 938 959
16
E02 819 640
17
E02 819 493
18
E02 A56 961
19
E02 819 297
20
E02 939 523
21
E02 B05 630
22
E02 939 515
23
E02 A49 641
24
E02 938 937
25
E02 939 936
26
E02 938 936
27
E02 B05 299
CABINET
HANDLE
GRILLE
COMPRESSOR
COMPRESSOR RUBBER SET
EXP ANSION V AL VE
LEV COIL
EXP ANSION V AL VE
LEV COIL
BASE
UNION(GAS)
UNION(LIQUID)
BACK PANEL
SERVICE PANEL
BALL V AL VE (GAS)
BALL V AL VE (LIQUID)
POWER RECEIVER
EXP ANSION V AL VE
LEV COIL
4-WAY VALVE
TOP PANEL
REAR GUARD
HEAT EXCHANGER
MOTOR SUPPORT
SERVICE PORT
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
OIL SEPARATOR
Symbol
in Wiring
Diagram
MC
LEV B
LEV A
LEV E
Remarks
SNB130FPDH1
3RUBBERS SET
B room
B room
A room
A room
[3/8
[1/4
[5/8
[3/8
E
O.D.0.14OI.D.0.09O19.68
O.D.0.16OI.D.0.11O3.93
O.D.0.98OI.D.0.02O39.37
81
PARTS LIST (non-RoHS compliant)
MXZ-2A20NA
13-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
12
11
10
9
8
1
2
435
82
6
7
PARTS LIST (non-RoHS compliant)
MXZ-2A20NA
13-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
Parts No. Parts Name
No.
E02 851 501
1
E02 A58 301
2
E02 B05 440
3
E02 B05 450
4
E02 B05 444
5
E02 927 374
6
E02 A53 374
7
E02 977 307
8
E02 B05 490
9
E02 938 308
10
E02 938 309
11
E02 938 337
12
PROPELLER
OUTDOOR FAN MOTOR
POWER BOARD
ELECTRONIC CONTROL P.C. BOARD
NOISE FILTER P.C. BOARD
TERMINAL BLOCK
TERMINAL BLOCK
GAS PIPE TEMPERATURE THERMIST OR SET
R.V. COIL
THERMISTOR SET
AMBIENT TEMPERA TURE THERMISTOR
REACTOR
Symbol
in Wiring
Diagram
MF
TB2,3
TB1
RT6A,B
21S4
RT61,62,68
RT65
L
Q'ty/unit
MXZ-2A20NA
1
1
1
1
1
2
1
1
1
1
1
1
Remarks
RC0J60-
Including heat sink and RT64
Indoor unit connecting
Power supply
DEFROST, DISCHARGE
OUTDOOR HEAT EXCHANGER
20A 600
µ
H
83
PARTS LIST (non-RoHS compliant)
MXZ-3A30NA
13-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
1
2
25
22
212324
20
19
18
17
16
15
14
13
12
5
7
9
8
6
11
10
3
4
84
PARTS LIST (non-RoHS compliant)
MXZ-3A30NA
13-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
Part numbers that are circled are not shown in the illustration.
Q'ty/unit
MXZ-3A30NA
1
2
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
3
1
1
Parts No. Parts Name
No.
M21 TK0 232
1
M21 TK0 027
2
M21 TK5 010
3
M21 TK0 245
4
T92 500 801
5
T2W TK0 505
6
R01 E39 401
7
T2W TK0 653
R01 E39 401
8
T2W TK0 652
R01 E39 401
9
T2W TK0 651
M21 TK0 290
10
M21 42E 644
11
T2W TK0 247
12
M21 TK5 667
13
T2W J7E 667
14
M21 J7E 248
15
T2W TK0 959
16
T2W J7E 961
17
M21 NT1 646
18
T2W WW8 401
19
20
T2W TK0 651
21
M21 TK0 297
22
T2W E40 523
23
M21 J7E 630
24
M21 TK0 249
M21 J7E 641
25
M21 SJ4 937
26
M21 TK0 936
27
28
T2W E59 936
29
T2W J7E 656
FRONT PANEL
HANDLE ASSEMBLY
GRILLE
SERVICE PANEL
COMPRESSOR
COMPRESSOR RUBBER SET
EXP ANSION V AL VE
LEV COIL
EXP ANSION V AL VE
LEV COIL
EXP ANSION V AL VE
LEV COIL
BASE ASSEMBLY
UNION
PIPE COVER
BALL VALVE (LIQUID) 3/8
BALL VALVE (GAS) 5/8
REAR PANEL
POWER RECEIVER
4-WAY VALVE
HIGH PRESSURE SWITCH
EXP ANSION V AL VE
LEV COIL
TOP PANEL
REAR GUARD
HEAT EXCHANGER
SIDE PANEL
SERVICE PORT
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
OIL SEPARATOR
Symbol
in Wiring
Diagram
MC
LEV C
LEV B
LEV A
HPS
LEV E
Remarks
TNB220FMCH
3RUBBERS SET
C room
C room
B room
B room
A room
A room
[1/2,[3/8,[1/4 SET
[3/8
[5/8
4.8MPa(48.9kg/cm2)
E
O.D.0.16OI.D.0.09O15.75
O.D.0.16OI.D.0.11O3.54
O.D.0.10OI.D.0.02O39.37
85
PARTS LIST (non-RoHS compliant)
MXZ-3A30NA
13-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
12
11
10
9
8
7
1
2
3
4
56
86
PARTS LIST (non-RoHS compliant)
MXZ-3A30NA
13-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
Parts No. Parts Name
No.
M21 TK0 501
1
T2W J7E 301
2
T2W J7E 440
3
T2W J7E 451
4
M21 TK0 337
5
T2W J7E 424
6
T2W YH1 376
7
T2W J7E 376
8
T2W E88 307
9
T2W J7E 398
10
M21 G0H 308
11
M21 90V 309
12
PROPELLER
OUTDOOR FAN MOTOR
POWER BOARD
ELECTRONIC CONTROL P.C. BOARD
REACTOR
NOISE FILTER P.C. BOARD
TERMINAL BLOCK
TERMINAL BLOCK
GAS PIPE TEMPERATURE THERMIST OR
R.V. COIL
THERMISTOR SET
AMBIENT TEMPERA TURE THERMISTOR
Symbol
in Wiring
Diagram
MF
L
TB2~4
TB1
RT6A,B,C
21S4
RT61,62,68
RT65
Q'ty/unit
MXZ-3A30NA
1
1
1
1
1
1
3
1
1
1
1
1
Remarks
RC0J60-
Including heat sink and RT64
20A 600
Indoor unit connecting
Power supply
DEFROST, DISCHARGE,
OUTDOOR HEAT EXCHANGER
µH
87
14
RoHS PARTS LIST (RoHS compliant)
MXZ-2A20NA MXZ-2A20NA -
1
14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
21
22
23
1
20
19
18
17
16
15
14
13
2
3
4 11
5 6 7 8 9 10 12
88
PARTS LIST (RoHS compliant)
MXZ-2A20NA MXZ-2A20NA -
1
14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
Part numbers that are circled are not shown in the illustration.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Parts No. Parts Name
RoHS
G
E12 939 232
G
E12 817 009
G
E12 939 521
G
E12 B05 900
G
E12 C15 900
G
E12 065 506
G
E12 851 640
G
E12 939 493
G
E12 851 640
G
E12 938 493
G
E12 939 290
G
E12 C06 666
G
E12 C18 666
G
E12 C06 667
G
E12 C18 667
G
E12 939 233
G
E12 939 245
G
E12 C15 661
G
E12 C06 662
G
E12 938 959
G
E12 C18 959
G
E12 853 640
G
E12 819 493
G
E12 A56 961
G
E12 819 297
G
E12 939 523
G
E12 B05 630
G
E12 939 515
G
E12 A49 641
G
E12 938 937
G
E12 939 936
G
E12 938 936
G
E12 B05 299
CABINET
HANDLE
GRILLE
COMPRESSOR
COMPRESSOR
COMPRESSOR RUBBER SET
EXP ANSION V AL VE
LEV COIL
EXP ANSION V AL VE
LEV COIL
BASE
UNION(GAS)
UNION(GAS)
UNION(LIQUID)
UNION(LIQUID)
BACK PANEL
SERVICE PANEL
BALL V AL VE (GAS)
BALL V AL VE (LIQUID)
POWER RECEIVER
POWER RECEIVER
EXP ANSION V AL VE
LEV COIL
4-WAY VALVE
TOP PANEL
REAR GUARD
HEAT EXCHANGER
MOTOR SUPPORT
SERVICE PORT
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
OIL SEPARATOR
Symbol
in Wiring
Diagram
MC
MC
LEV B
LEV A
LEV E
2A20NA
MXZ-
1
1
1
1
3
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
8
2
1
1
Q'ty/unit
MXZ-
2A20NA -
1
1
1
1
3
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
8
2
1
1
1
Remarks
SNB130FPDH1
SNB130FQBH1
3RUBBERS SET
B room
B room
A room
A room
[3/8
[3/8
[1/4
[1/4
[5/8
[3/8
E
O.D.0.14OI.D.0.09O19.68
O.D.0.16OI.D.0.11O3.93
O.D.0.98OI.D.0.02O39.37
89
RoHS PARTS LIST (RoHS compliant)
MXZ-2A20NA MXZ-2A20NA -
1
14-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
12
11
10
9
8
1
2
435
90
6
7
Symbol
in Wiring
Diagram
Q'ty/unit
MXZ-
2A20NA
Remarks
Parts No. Parts Name
MXZ-
2A20NA -
1
E12 851 501
E12 A58 301
E12 B05 440
E12 C15 440
E12 B05 450
E12 C15 450
E12 B05 444
E12 927 374
E12 A53 374
E12 977 307
E12 B05 490
E12 938 308
E12 938 309
E12 938 337
1
2
3
4
5
6
7
8
9
10
11
12
PROPELLER
OUTDOOR FAN MOTOR
POWER BOARD
POWER BOARD
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
NOISE FILTER P.C. BOARD
TERMINAL BLOCK
TERMINAL BLOCK
GAS PIPE TEMPERATURE THERMISTOR SET
R.V. COIL
THERMISTOR SET
AMBIENT TEMPERATURE THERMISTOR
REACTOR
No.
G
G
G
G
G
G
G
G
G
G
G
G
G
G
RoHS
MF
TB2,3
TB1
RT6A,B
21S4
RT61,62,68
RT65
L
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
RC0J60-
Including heat sink and RT64
Including heat sink and RT64
Indoor unit connecting
Power supply
20A 600
µ
H
DEFROST, DISCHARGE
OUTDOOR HEAT EXCHANGER
PARTS LIST (RoHS compliant)
MXZ-2A20NA MXZ-2A20NA -
1
14-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
91
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA
14-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
1
2
25
22
212324
20
19
18
17
16
15
14
13
12
5
7
9
8
6
11
10
3
4
92
Symbol
in Wiring
Diagram
Q'ty/unit
Remarks
Parts No. Parts Name
MXZ-3A30NA
M21 L2V 232
M21 L2V 027
M21 L2V 010
M21 L2V 245
T92 505 801
M21 L2V 505
M21 L2V 401
M21 L2V 653
M21 L2V 401
M21 L2V 652
M21 L2V 401
M21 L2V 651
M21 L2V 290
M21 L2V 644
M21 L2V 247
M21 L2V 667
T2W L7V 668
T2W L7V 248
T2W L7V 959
T2W L7V 642
M21 L2V 646
M21 L2V 402
M21 L2V 651
M21 L2V 297
M21 L2V 523
T2W L7V 630
M21 L2V 249
T2W L7V 641
M21 L2V 937
M21 L2V 936
M21 L2V 938
T2W L7V 656
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
FRONT PANEL
HANDLE ASSEMBL Y
GRILLE
SERVICE PANEL
COMPRESSOR
COMPRESSOR RUBBER SET
EXPANSION VALVE
LEV COIL
EXPANSION VALVE
LEV COIL
EXPANSION VALVE
LEV COIL
BASE ASSEMBL Y
UNION
PIPE COVER
BALL VALVE (LIQUID) 3/8
BALL VALVE (GAS) 5/8
REAR PANEL
POWER RECEIVER
4-WAY VALVE
HIGH PRESSURE SWITCH
EXPANSION VALVE
LEV COIL
TOP PANEL
REAR GUARD
HEAT EXCHANGER
SIDE PANEL
SERVICE PORT
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
OIL SEPARATOR
No.
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
RoHS
MC
LEV C
LEV B
LEV A
HPS
LEV E
1
2
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
3
1
1
TNB220FMCH
3RUBBERS SET
C room
C room
B room
B room
A room
A room
[1/2,[3/8,[1/4 SET
[3/8
[5/8
4.8MPa(48.9kg/cm2)
E
O.D.0.16OI.D.0.09O15.75
O.D.0.16OI.D.0.11O3.54
O.D.0.10OI.D.0.02O39.37
PARTS LIST (RoHS compliant)
MXZ-3A30NA
14-3. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
Part numbers that are circled are not shown in the illustration.
93
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA
14-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
12
11
10
9
8
7
1
2
3
4
56
94
PARTS LIST (RoHS compliant)
MXZ-3A30NA
14-4. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
No.
1
2
3
4
5
6
7
8
9
10
11
12
RoHS
G
G
G
G
G
G
G
G
G
G
G
G
Parts No. Parts Name
M21 L2V 501
T2W L7V 301
T2W L7V 440
T2W L7V 451
M21 L2V 337
T2W L7V 424
T2W L2V 376
T2W L7V 377
M21 L7V 307
T2W L7V 398
M21 L2V 308
M21 L2V 309
PROPELLER
OUTDOOR FAN MOTOR
POWER BOARD
ELECTRONIC CONTROL P.C. BOARD
REACTOR
NOISE FILTER P.C. BOARD
TERMINAL BLOCK
TERMINAL BLOCK
GAS PIPE TEMPERATURE THERMIST OR
R.V. COIL
THERMISTOR SET
AMBIENT TEMPERA TURE THERMISTOR
Symbol
in Wiring
Diagram
MF
L
TB2~4
TB1
RT6A,B,C
21S4
RT61,62,68
RT65
Q'ty/unit
MXZ-3A30NA
1
1
1
1
1
1
3
1
1
1
1
1
Remarks
RC0J60-
Including heat sink and RT64
20A 600µH
Indoor unit connecting
Power supply
DEFROST, DISCHARGE,
OUTDOOR HEAT EXCHANGER
95
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA - MXZ-4A36NA
1
14-5. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
19
20
18
17
14
13
16
23
24
22
21
15
2
5
96
6
7
10
8
9
11
12
4
1
2
3
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA - MXZ-4A36NA
1
14-5. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
Part numbers that are circled are not shown in the illustration.
1
2
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2
3
1
1
Q'ty/unit
1
MXZ-4A36NA
1
2
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2
4
1
1
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Parts No.
RoHS
M21 0A2 232
G
M21 0A2 027
G
M21 L2V 010
G
M21 0A2 245
G
T92 505 801
G
M21 L2V 505
G
M21 L2V 401
G
M21 L2V 654
G
M21 L2V 401
G
M21 L2V 653
G
M21 L2V 401
G
M21 L2V 652
G
M21 L2V 401
G
M21 L2V 651
G
G
M21 0A2 290
G
M21 0A2 644
G
M21 0A2 668
G
M21 0A6 667
G
M21 0A2 248
G
T2W L7V 642
G
M21 L2V 646
G
M21 L2V 402
G
M21 0A2 402
G
M21 0A2 652
G
M21 L2V 297
G
M21 0A2 523
G
T2W 0A6 630
G
T2W 0A2 630
G
M21 L2V 249
G
T2W L7V 641
G
T2W L7V 959
G
M21 0A2 937
G
M21 0A2 936
G
M21 L2V 938
G
T2W L7V 656
Parts Name
FRONT PANEL
HANDLE ASSEMBLY
GRILLE
SERVICE PANEL
COMPRESSOR
COMPRESSOR RUBBER SET
EXP ANSION V AL VE
LEV COIL
EXP ANSION V AL VE
LEV COIL
EXP ANSION V AL VE
LEV COIL
EXP ANSION V AL VE
LEV COIL
BASE ASSEMBLY
UNION
STOP VALVE (LIQUID) 3/8
STOP VALVE (GAS) 5/8
REAR PANEL
4-WAY VALVE
HIGH PRESSURE SWITCH
EXP ANSION V AL VE
EXP ANSION V AL VE
LEV COIL
TOP PANEL
REAR GUARD
HEAT EXCHANGER
HEAT EXCHANGER
SIDE PANEL
SERVICE PORT
POWER RECEIVER
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
OIL SEPARATOR
Symbol
in Wiring
Diagram
MC
LEV D
LEV C
LEV B
LEV A
HPS
LEV F
MXZ-3A30NA -
Remarks
TNB220FMCH
3RUBBERS SET
D room
D room
C room
C room
B room
B room
A room
A room
[1/2,[3/8,[1/4 SET
[3/8
[5/8
4.8MPa(48.9kg/cm2)
F
F
O.D.0.12OI.D.0.08O11.8
O.D.0.16OI.D.0.11O3.94
O.D.0.10OI.D.0.02O39.37
97
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA - MXZ-4A36NA
1
14-6. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
11
10
9
8
7
124356
98
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA - MXZ-4A36NA
1
14-6. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
1
1
1
1
1
1
3
1
1
1
1
Q'ty/unit
1
MXZ-4A36NA
No.
1
2
3
4
5
6
7
8
9
10
11
Parts No. Parts Name
RoHS
M21 L2V 501
G
T2W L7V 301
G
M21 0A1 440
G
T2W 0A6 451
G
T2W 2G6 451
G
M21 L2V 337
G
M21 0A0 424
G
T2W 0A2 376
G
T2W L7V 377
G
T2W L7V 398
G
M21 L2V 308
G
M21 0A2 309
G
PROPELLER
OUTDOOR FAN MOTOR
POWER BOARD
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
REACTOR
NOISE FILTER P.C. BOARD
TERMINAL BLOCK
TERMINAL BLOCK
R.V. COIL
THERMISTOR SET
AMBIENT TEMPERA TURE THERMISTOR
Symbol
in Wiring
Diagram
MF
L
TB2~5
TB1
21S4
RT61,62,68
RT65
MXZ-3A30NA -
Remarks
1
1
1
1
1
1
4
1
1
1
1
PM8H60-
Including heat sink and RT64
20A 600µH
Indoor unit connecting
Power supply
DEFROST, DISCHARGE,
OUTDOOR HEAT EXCHANGER
99
15
B
A
C
Z
Z
21-3/16"
20-5/8"
9/32"
1-7/8"
5/8"
17/32"
52.5-
Punched hole
5/32" - [1/4"
17-3/4"
13/32x1-7/8"
1-11/16"
2-13/16"
Z-Z
9/32"
3-1/8"12-7/8"
4-1/16"
21-5/32"
24-1/32"
21-1/32"
21-1/32"
15-3/16"
16-3/8"
2-1/32"
5-29/32"
4-5/16"
1-5/32"29-15/16"1-5/32"
1/4"1/4"
32-3/4"
15-3/16"
Punched hole
Punched hole
3/16" - [1/4"
3/16" - [1/4"
Model name
Model code
1
1
Applied unit
MAC-889SG 506-889
MXZ-2A20NA
MXZ-2A20NA -
MAC-855SG 51H-855
MXZ-3A30NA
MXZ-3A30NA MXZ-4A36NA
1
1
MXZ-2A20NA
MXZ-2A20NA MXZ-3A30NA
MXZ-3A30NA MXZ-4A36NA
Model name
Connected pipes
diameter
LengthALengthBLength
C
MAC-A454JP {3/8 {1/2{3/8 — {1/2 2.72
PAC-SG76RJ-E {3/8 — {5/8 4{5/8{3/8
PAC-493PI {1/4 — {3/8 2.38{3/8{1/4
For differentdiameter
pipes
MAC-A456JP {1/2 — {5/8 2.62{5/8{1/2
MAC-A455JP {1/2 — {3/8 2.56{3/8{1/2
OPTIONAL PARTS
15-1. Different-diameter pipe
15-2. Outlet guide
Changes air discharge direction.
Unit : inch
Unit : inch
MAC-889SG
MAC-855SG
100
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