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Mitsubishi Electronics MXZ-2A20NA, MXZ-3A30NA User Manual

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Page 1
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
33223
9700058
OUTDOOR UNIT
Revision B:
• MXZ-2A20NA - and MXZ-3A30NA ­have been added.
Please void OB444 REVISED EDITION-A.
11
SERVICE MANUAL
Inverter-controlled multi system type
Models
MXZ-2A20NA MXZ-2A20NA -
1
MXZ-3A30NA MXZ-3A30NA -
1
CONTENTS
HFC
utilized
R410A
Indoor unit service manual
MSZ-A·NA Series (OB450)
No. OB444
REVISED EDITION-B
MXZ-2A20NA MXZ-2A20NA -
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.
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR UNITS COMBINATION ·······················7
4. SPECIFICATION···············································10
6. WIRING DIAGRAM ··········································15
7. REFRIGERANT SYSTEM DIAGRAM··············19
8. DATA·································································23
9. ACTUA TOR CONTROL····································38
10. SERVICE FUNCTIONS·····································38
11. TROUBLESHOOTING ······································40
12. DISASSEMBLY INSTRUCTIONS·····················57
13. PARTS LIST······················································66
1
14. RoHS PARTS LIST···········································74
15. OPTIONAL PARTS ···········································86
The Slim Line. From Mitsubishi Electric.
TM
Page 2
Revision A:
• RoHS PARTS LIST has been added.
Revision B:
• MXZ-2A20NA - and MXZ-3A30NA - have been added.
1
TECHNICAL CHANGES
11
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
2
Page 3
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
Page 4
R410A tools
Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing gauges.
Hose material have 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
Page 5
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
(inch) [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
Page 6
2
Air inlet
Drain outlet
(Back and side)
Air outlet
Air inlet
Drain outlet
(Back and side)
Air outlet
PART NAMES AND FUNCTIONS
MXZ-2A20NA MXZ-2A20NA -
MXZ-3A30NA
1
MXZ-3A30NA -
1
Air inlet
(Back and side)
Air outlet
Drain outlet
6
Page 7
3
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
INDOOR UNITS COMBINATION
7
Page 8
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
Page 9
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
Power consumption
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)
(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
Page 10
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)
12.4 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
10
Page 11
Item Model
❈1
❈1
❈1 ❈2
❈1 ❈2
Btu/h Btu/h Btu/h
W W W
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 Max. fuse size (time delay) Min. circuit ampacity Fan motor
V, phase, Hz
A A
F.L.A
Model
Compressor
Winding resistance (at 68˚F) "
R.L.A
L.R.A Refrigerant control Sound level
dB(A) Defrost method
Dimensions
Weight
W D H
in. in. in.
MXZ-3A30NA
lb.
MXZ-3A30NA ­Remote controller Control voltage (by built-in transformer) Refrigerant piping
Valve size Connection method
Liquid Gas Indoor
Outdoor Refrigerant charge (R410A) Refrigeration oil (Model)
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
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)
13.1
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
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
Test
w
Indoor air condition Outdoor air condition
Wet bulb
67 67 67 67 67 60 60 60 60 60 60
w
Dry bulb
80 80 80 80 80 70 70 70 70 70 70
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
11
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
Page 12
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.
12
Grounding terminal
Conduit cover
Lock nut
Connector
Page 13
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
13
Page 14
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
14
Page 15
6
MXZ-2A20NA
WIRING DIAGRAM
15
Page 16
MXZ-2A20NA -
1
16
Page 17
MXZ-3A30NA
17
Page 18
MXZ-3A30NA -
1
18
Page 19
7
1
Ball valve with
service port
Ball valve
Strainer #100
Power
receiver
LEV A
LEV B
Oil separator
Compressor
Defrost thermistor RT61
Distributor
Muffler
4-way valve
LEV E
Indoor unit
B
Unit B gas pipe temperature thermistor
W
Indoor unit
A
Indoor unit
A
Indoor unit
B
Unit A gas pipe temperature thermistor
W
Capillary tube
O.D.0.14✕I.D.0.09✕19.68
Capillary tube
O.D.0.98✕I.D.0.02✕39.37
Capillary tube
O.D.0.16✕I.D.0.11✕ 3.93
Capillary tube
O.D.0.16✕I.D.0.11✕ 3.93
Discharge temperature
thermistor RT62
Strainer #100
Strainer #100
R.V. coil
OFF
ON
Refrigerant flow in cooling Refrigerant flow in heating
Ambient temperature thermistor RT65
Outdoor heat exchanger temperature thermistor RT68
FAN-OUT
HEX-OUT
Service
port
Service
port
Strainer #100
W Except MXZ-2A20NA - .
REFRIGERANT SYSTEM DIAGRAM
MXZ-2A20NA MXZ-2A20NA -
1
Unit:mm
19
Page 20
a
b
Outdoor unit
Indoor units
49ft.
33ft.
49ft.
Operating Range MXZ-2A20NA MXZ-2A20NA -
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-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.
❋It does not matter which unit is higher.
1
● 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
20
Page 21
MXZ-3A30NA
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
Unit:mm
MXZ-3A30NA -
1
21
Unit:mm
Page 22
a
c
Outdoor unit
Indoor units
33ft. (MXZ-3A30NA)
49ft. (MXZ-3A30NA - )
33ft.
b
1
49ft. (MXZ-3A30NA - )
1
33ft. (MXZ-3A30NA)
Operating Range MXZ-3A30NA MXZ-3A30NA -
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-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
● 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
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
09
12
15
17
24
Extension pipe diameter
22
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
Page 23
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
23
Page 24
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
28,600
–
2.18
2.127
10.15/9.18
0.43/0.39 330
96 150 100
30 125
47
43 600
1,605
DB WB
Item
Model
Total
Electrical circuit
Refrigerant circuit
Outdoor unit
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 -
208/230, 1, 60
MXZ-3A30NA MXZ-3A30NA -
25 [75]
7lb.11oz.
24
Page 25
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 -
w
At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
1
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
MXZ-2A20NA MXZ-2A20NA -
(1) POWER SUPPLY
(2) OPERATION
25
Page 26
w
At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
1
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
MXZ-3A30NA MXZ-3A30NA -
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA -
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.
11
(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
26
Cooling
}
Heating
}
Wet-and dry-bulb thermometers
Page 27
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)
7.8
7.2
6.6
5.9
5.3
4.8
9.3
8.5
7.8
7.0
6.3
5.6
11.1
10.2
9.2
8.3
7.5
6.6
12.2
11.2
10.1
9.1
8.2
7.2
10.9
10.0
9.1
8.2
7.3
6.5
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)
24.0
22.2
20.3
18.5
16.6
14.8
12.9
11.1
26.1
24.1
22.1
20.0
18.0
16.0
14.0
12.0
31.9
29.5
27.0
24.6
22.1
19.7
17.2
14.7
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)
24.0
22.2
20.3
18.5
16.6
14.8
12.9
11.1
26.1
24.1
22.1
20.0
18.0
16.0
14.0
12.0
31.9
29.5
27.0
24.6
22.1
19.7
17.2
14.7
35.7
32.9
30.2
27.4
24.7
21.9
19.2
16.5
27.6
25.5
23.4
21.2
19.1
17.0
14.9
12.7
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 -
11.1
9.3
7.8
10.2
8.5
7.2
9.2
7.8
6.6
8.3
7.0
5.9
7.5
6.3
5.3
difference (degree)
Indoor air WB temperature
4.8
(36Hz)
09 class
Indoor unit class
(Inverter output
frequency)
5.6
12 class
6.6
(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
MXZ-3A30NA MXZ-3A30NA -
NOTE:The above broken lines are for the heating operation without any frost and defrost operation.
1
NOTE:The above broken lines are for the heating operation without any frost and defrost operation.
27
Page 28
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
28
Page 29
(OUTDOOR UNIT:MXZ-3A30NA MXZ-3A30NA - )
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
29
Page 30
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
30
Page 31
2. 12-class unit in single operation (OUTDOOR UNIT : MXZ-2A20NA MXZ-2A20NA - )
65 70 75 80 85 90 95 100 105 110 115
120
140
150
160
170
130
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) 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.
1
<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.
31
Page 32
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.
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)
32
Page 33
4. 09-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - )
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
33
Page 34
5. 12-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - )
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
°F)
6.0
Indoor DB temperature(
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(
Ambient temperature(°F)
°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)
34
(°F)
Page 35
6. 15-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - )
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.
5.To 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 95 100 105 110 115
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.
°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)
35
45Hz
(°F)
Page 36
7. 17-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - )
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
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.
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.
36
Page 37
8. 24-class unit in single operation (OUTDOOR UNIT : MXZ-3A30NA MXZ-3A30NA - )
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.
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
4.0
150
75
Indoor DB temperature(
3.0
Outdoor low pressure
140
130
65 70 75 80 85 90 95 100 105 110 115
33Hz
Outdoor unit current (A)
70
2.0
1.0
(°F)
65 70 75 80 85 90 95 100 105 110 115
°F)
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)
37
Page 38
9
ON
SW2
123456
ON
SW2
123456
MXZ-3A30NA -
SW2
SW1
SW871
ON
SW1
1234
MXZ-2A20NA -
ON
1234
SW1
1
1
ACTUATOR CONTROL
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA -
11
Relation between main sensor and actuator
Sensor
Discharge temperature thermistor Indoor pipe temperature 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 - >
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 - ).
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.
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10-2. Auto line correcting <MXZ-3A30NA - >
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.
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.
6. Press the switch to cancel.
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.
SW871
W Be sure to check for closed valves, cracked pipes or clogged pipes.
LED indication after cancel :
LED1(Red)
Lighting
LED indication during detection:
LED indication after detection:
LED2(Yellow)
Lighting
LED3(Green)
Blinking
LED1(Red)
Lighting
LED2(Yellow)
Lighting
LED3(Green)
Goes out
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
SW871
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:
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").
LED1(Red)
Once
3 times
LED2(Yellow)
Once
3 times
LED3(Green)
Lighting Lighting
Not corrected Corrected
Number of blinks
Wiring line
1
Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping.
The record of auto line correcting can be confirmed in the following way:
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11
Lead wiring
Housing point
TROUBLESHOOTING
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA -
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".
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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
Lighting Lighting
Lighting Once
Lighting Once Lighting Twice
Lighting 3 times Lighting 4 times
Lighting
9 times
Once
Goes out
Lighting
Lighting
Lighting
Lighting
3 times
Goes
out
4 times Goes
out
Lighting
Lighting
Lighting
Lighting
Lighting
5 times
9-time flash
10-time flash
• Check the connection of the compressor connecting wire.
• Refer to 11-6.E
"How to check inverter / compressor".
• Check the stop valve.
• Replace the outdoor
electronic control P.C. board.
•Check refrigerant circuit
and refrigerant amount.
• Refer to 11-6.D "Check
of LEV".
• 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".
• Reconnect compressor
connector.
• Refer to 11-6.E "How to
check inverter/ compressor".
• Check the stop valve.
•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.F "Check
of outdoor thermistors".
• Refer to 11-6.F "Check
of outdoor thermistors".
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 28A current flow 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-3A30)
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.
Outdoor power system
Discharge temperature thermistor
Defrost thermistor Ambient temperature thermistor Fin temperature thermistor P.C. board temperature
thermistor
Outdoor heat exchanger temperature thermistor
Overcurrent
Discharge temperature
High pressure
Fin temperature
P.C. board temperature
Outdoor fan motor
Nonvolatile memory data
Discharge temperature
--
Gas pipe temperature thermistor A
Lighting 10 times
Gas pipe temperature thermistor B
Lighting 11 times
Gas pipe temperature thermistor C
Lighting
12 times
When a short or open circuit is detected in the thermistor during cooling. (A,B: MXZ-2A20NA, MXZ-3A30NA) (C : MXZ-3A30NA)
None (Normal)
Abnormal point
(Failure mode / protection)
Condition
Correspondence
Indoor/outdoor
unit failure mode
recall function
LED indication
(Outdoor P.C. board)
LED 1 LED 2
2. Outdoor unit failure mode table
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4.).
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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.
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11-4. Troubleshooting check table
LED2
LED1
Outdoor electronic control P.C. board(Parts side)
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-3A30)
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.
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
43
0.5-second ON
Page 44
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)
Lighting
LED2
LED1
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”.
0.5-second ON
0.5-second ON
ON OFF
2.5-second OFF
2.5-second OFF
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W
U
V
WHT
RED
BLK
LEV
WHT
U
RED
WHT
BLK
V
W
(W)
(V)
(U)
RED
YLW
BRN
ORN
BLU
11-5. Trouble criterion of main parts
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA -
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
Linear expansion valve
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
0.39" ~ 0.49"
MXZ-2A20NA
1
-
0.86Ω ~ 1.06Ω
MXZ-3A30NA
MXZ-3A30NA -
1.29" ~ 1.49"
1
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"
Measure the resistance using a tester.(Part temperature : 14˚F ~ 104˚F)
High pressure switch (HPS)
MXZ-3A30NA MXZ-3A30NA -
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
45
Page 46
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 -
Outdoor unit does not operate. (LED display: display OFF)
AA
Check of power supply
11
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• 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
Turn OFF the power supply.
LED indication for communication status
Communication status is indicated by the LED.
Unit status 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.
MXZ-2A20NA MXZ-2A20NA ­MXZ-3A30NA
Outdoor electronic control P.C. board
Pattern
Pattern
LED 3
1
Lighting
2
Goes out
MXZ-3A30NA -
Outdoor electronic control P.C. board
LED 1 LED 3LED 2
Unit A
1
status
2
· Turn OFF inverter-controlled lighting equipment.
· Turn OFF the power supply and then turn ON again.
· Press EMERGENCY OPERATION switch.
Is serial signal error indicated 6 minutes later?
1
(Parts side)
LED3 LED2
Blinking
Unit B status
Lighting
1
(Parts side)
LED1 LED2
Blinking
Unit B
status
LightingLighting
Yes
B
LED1
LED3
A
· Reinstall
No
· Attach a filter
LED 1LED 2
Unit A status
Unit C
status
Unit C status
Goes out
either the unit or the light each other away.
on remote control receiving section of the indoor unit.
Is there rated voltage in the power supply?
Yes
Turn ON the power supply.
Is there rated voltage between outdoor terminal block S1 and S2?
Press EMERGENCY OPERATION switch once.
Does the left lamp of OPERATION INDICATOR lamp light up? <Confirmation of the power to the indoor unit>
Is serial signal error indicated 6 minutes later?
Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring.
B
Short-circuit outdoor terminal block S2 and S3. W1
Turn ON the power supply.
Does the LED on the outdoor electronic control P.C. board repeat "3.6-second-OFF and 0.8-second-ON quick blinking"?
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.
Be sure to release the failure-mode recall function after checking.
Refer to indoor unit service manual.
Yes
Yes
Yes
A
Yes
Yes
Yes
No
No
Check the power supply.
Check the wiring.
No
Is there any mis-wiring, poor contact, or wire
No
disconnection of the indoor/outdoor connecting wire?
No
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.
No
(Lighted or not lighted)
No
No
Replace the outdoor electronic control P.C. board.
W2 W2 Be careful to the residual
voltage of smoothing capacitor.
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
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
Yes
Yes
Yes
Correct them.
Replace the indoor/outdoor connecting wire.
Replace the indoor/outdoor connecting wire.
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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.
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Page 49
• 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, 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.
49
Page 50
• 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
50
Page 51
• When thermistor is abnormal.
Thermistor Defrost Discharge temperature Outdoor heat exchanger temperature Gas pipe temperature (Unit A) Gas pipe temperature (Unit B) Gas pipe temperature (Unit C) Ambient temperature Fin temperature
w w w
w Except MXZ-2A20NA - and MXZ-3A30NA - .
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
51
Page 52
• When the operation frequency does not go up from lowest frequency.
HH
Check of HPS
MXZ-3A30NA MXZ-3A30NA -
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.
0 "
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?
No
Normal
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
Infinity
Yes
Replace the electronic control P.C. board.
Replace HPS.
52
Page 53
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
Discharge temperature thermistor (RT62)
700 600 500 400 300 200
Resistance (k")
100
0
32
50 68 86 104 122 140 158 176 194 212 230 248
Temperature (˚F)
20-90V AC
(
motor
(
CN932
To fan
5V DC
pulse wave
(
5V
GND
Fin temperature thermistor (RT64)
200 180 160 140 120 100
80
Resistance (k")
60 40 20
0
32 50 68 86 104 122140 158176
CN702
Signal reception
(From power board)
5V DC pulse wave
(
GND
(–)
Temperature (˚F)
(
Rush current relay
GND (power board)
15V
15V
(–)
DC
12V
R.V. coil (–)
Defrost thermistor (RT61) Ambient temperature thermistor (RT65) Gas pipe temperature thermistor (RT6A,6B,6C)w Outdoor heat exchanger temperature thermistor (RT68)
100
90 80 70 60 50
Resistance (k")
40 30 20 10
0
-4 -14 32 50 68 86 104
CN795
12V DC
CN781
pulse wave
LEV E
Temperature (˚F)
w Except MXZ-2A20NA - .
(
(–)
(+)
(+)
(
(
1
LED 1 LED 2
LED 3
SW1
CN801
294V DC
~
370V DC
Input
F801
FUSE
T3.15AL250V
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
CN662
CN681
(
(
(
Gas pipe B thermistor w
Gas pipe C thermistor w
Gas pipe Athermistor w
(
MXZ-3A30NA
High pressure switch
(+)
C
(
(
(–)
(
12V DC
pulse wave
LEV Room
CN793
(+)
B
(
(
(–)
(
12V DC
pulse wave
LEV Room
CN792
(
(+)
LEV Room
A
CN791
(
(–)
(
12V DC
pulse wave
53
Page 54
MXZ-3A30NA -
Discharge temperature thermistor (RT62)
700 600 500 400 300 200
Resistance (kΩ)
100
0
0 102030405060708090100110120
Temperature (:)
LED 1 LED 2
LED 3
1
motor
(
CN932
20-90V AC
(
To fan
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)
Fin temperature thermistor (RT64)
200 180 160 140 120 100
80
Resistance (kΩ)
60 40 20
0
0 1020304050607080
Temperature (:)
CN701
CN702
Signal transmission
(To power board)
5V DC pulse wave
Signal reception
(From power board)
5V DC pulse wave
Rush current relay
15V DC
GND
GND
(–)
Defrost thermistor (RT61) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68)
100
90 80 70 60 50
Resistance (kΩ)
40 30 20 10
0
-20 -10 0 10 20 30 40
Temperature (:)
CN781
R.V. coil (–)
(+)
F931
FUSE
T3.15AL250V
SW1 SW2
SW871
CN801
294~370 V DC
Input
F801
FUSE
T3.15AL250V
CN681 High pressure switch
(
CN796
{
–
LEV F 12VDC
(
+
pulse wave
CN793 LEV Room C
CN792 LEV Room B
CN791 LEV Room A
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
54
Page 55
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
NR64 VARISTOR
MXZ-3A30NA -
208/230V AC Output
F64 FUSE T2AL250V
1
F64 FUSE T2AL250V
CN901 To electronic control P.C. board
{
CN902 To power board
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
55
Page 56
3. Outdoor Power board
MXZ-2A20NA MXZ-2A20NA - MXZ-3A30NA MXZ-3A30NA -
Connect to the compressor Voltage among phases: 5V to 180V
11
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)
56
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)
5V DC pulse wave
Page 57
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
57
Page 58
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
58
Page 59
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
Screws of the reactor
59
Page 60
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
60
Photo 3
LEV coil E
Expansion valve E
Suction pipe welded part
Discharge pipe welded part
Page 61
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
61
Page 62
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
62
Page 63
12-3. MXZ-3A30NA -
OUTDOOR UNIT
1
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 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, 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.
(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
PHOTOS
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
63
Page 64
OPERATING PROCEDURE
PHOTOS
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
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.
64
Photo 7
LEV coils
LEV coil F
Welded parts
Expansion valve F
Expansion valves
Page 65
OPERATING PROCEDURE PHOTOS
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
65
Page 66
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
66
Page 67
Symbol
in Wiring
Diagram
Q'ty/unit
MXZ-2A20NA
Remarks
Parts No. Parts Name
E02 939 232 E02 817 009 E02 939 521 E02 B05 900 E02 065 506 E02 851 640 E02 939 493 E02 851 640 E02 938 493 E02 939 290 E02 939 666 E02 939 667 E02 939 233 E02 939 245 E02 B05 661 E02 939 662 E02 938 959 E02 819 640 E02 819 493 E02 A56 961 E02 819 297 E02 939 523 E02 B05 630 E02 939 515 E02 A49 641 E02 938 937 E02 939 936 E02 938 936 E02 B05 299
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
CABINET HANDLE GRILLE COMPRESSOR COMPRESSOR RUBBER SET EXPANSION VALVE LEV COIL EXPANSION VALVE LEV COIL BASE UNION(GAS) UNION(LIQUID) BACK PANEL SERVICE PANEL BALL VALVE (GAS) BALL VALVE (LIQUID) POWER RECEIVER EXPANSION VALVE LEV COIL 4-WAY VALVE TOP PANEL REAR GUARD HEAT EXCHANGER MOTOR SUPPORT SERVICE PORT CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE OIL SEPARATOR
No.
MC
LEV B
LEV A
LEV E
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
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
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.
67
Page 68
PARTS LIST (non-RoHS compliant)
MXZ-2A20NA 13-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
12
11
10
9
8
1
2
435
68
6
7
Page 69
Symbol in Wiring Diagram
Q'ty/unit
MXZ-2A20NA
Remarks
Parts No. Parts Name
E02 851 501 E02 A58 301 E02 B05 440 E02 B05 450 E02 B05 444 E02 927 374 E02 A53 374 E02 977 307 E02 B05 490 E02 938 308 E02 938 309 E02 938 337
1 2 3 4 5 6 7 8
9 10 11 12
PROPELLER OUTDOOR FAN MOTOR POWER 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.
MF
TB2,3
TB1
RT6A,B
21S4
RT61,62,68
RT65
L
1 1 1 1 1 2 1 1 1 1 1 1
RC0J60-
Including heat sink and RT64
Indoor unit connecting
Power supply
20A 600
µ
H
DEFROST, DISCHARGE OUTDOOR HEAT EXCHANGER
PARTS LIST (non-RoHS compliant)
MXZ-2A20NA 13-2. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
69
Page 70
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
70
Page 71
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 12
T2W TK0 247
13
M21 TK5 667
14
T2W J7E 667
15
M21 J7E 248
16
T2W TK0 959
17
T2W J7E 961
18
M21 NT1 646
19
T2W WW8 401
20
T2W TK0 651
21
M21 TK0 297
22
T2W E40 523
23
M21 J7E 630
24
M21 TK0 249
25
M21 J7E 641
26
M21 SJ4 937
27
M21 TK0 936
28
T2W E59 936
29
T2W J7E 656
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
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
71
Page 72
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
72
Page 73
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 THERMISTOR R.V. COIL THERMISTOR SET AMBIENT TEMPERATURE 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
73
Page 74
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
74
Page 75
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.
RoHS
1
G
E12 939 232
2
G
E12 817 009
3
G
E12 939 521
G
E12 B05 900
4
G
E12 C15 900
5
G
E12 065 506
G
E12 851 640
6
G
E12 939 493
G
E12 851 640
7
G
E12 938 493
8
G
E12 939 290
G
E12 C06 666
9
G
E12 C18 666
G
E12 C06 667
10
G
E12 C18 667
11
G
E12 939 233
12
G
E12 939 245
13
G
E12 C15 661
14
G
E12 C06 662
G
E12 938 959
15
G
E12 C18 959
16
G
E12 853 640
17
G
E12 819 493
18
G
E12 A56 961
19
G
E12 819 297
20
G
E12 939 523
21
G
E12 B05 630
22
G
E12 939 515
23
G
E12 A49 641
24
G
E12 938 937
25
G
E12 939 936
26
G
E12 938 936
27
G
E12 B05 299
Parts No. Parts Name
CABINET HANDLE GRILLE COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET EXPANSION VALVE LEV COIL EXPANSION VALVE LEV COIL BASE UNION(GAS) UNION(GAS) UNION(LIQUID) UNION(LIQUID) BACK PANEL SERVICE PANEL BALL VALVE (GAS) BALL VALVE (LIQUID) POWER RECEIVER POWER RECEIVER EXPANSION VALVE 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
75
Page 76
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
76
6
7
Page 77
PARTS LIST (RoHS compliant)
MXZ-2A20NA MXZ-2A20NA -
1
14-2. 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 G G
Parts No. Parts Name
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
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
Symbol
in Wiring
Diagram
MF
TB2,3
TB1
RT6A,B
21S4
RT61,62,68
RT65
L
2A20NA
MXZ-
1 1 1
1
1 2 1 1 1 1 1 1
Q'ty/unit
MXZ-
2A20NA -
1
1 1
1
1 1 2 1
1 1 1 1
Remarks
RC0J60-
Including heat sink and RT64 Including heat sink and RT64
Indoor unit connecting
Power supply
DEFROST, DISCHARGE OUTDOOR HEAT EXCHANGER
20A 600
µ
H
77
Page 78
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
78
Page 79
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.
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
No.
RoHS
M21 L2V 232
G
1
M21 L2V 027
G
2
M21 L2V 010
G
3
M21 L2V 245
G
4
T92 505 801
G
5
M21 L2V 505
G
6
M21 L2V 401
G
7
M21 L2V 653
G
M21 L2V 401
G
8
M21 L2V 652
G
M21 L2V 401
G
9
M21 L2V 651
G
M21 L2V 290
G
10
G
M21 L2V 644
11
G
12
M21 L2V 247
G
13
M21 L2V 667
G
14
T2W L7V 668
G
15
T2W L7V 248
G
16
T2W L7V 959
G
17
T2W L7V 642
G
18
M21 L2V 646
G
19
M21 L2V 402
G
20
M21 L2V 651
G
21
M21 L2V 297
G
22
M21 L2V 523
G
23
T2W L7V 630
G
24
M21 L2V 249
G
25
T2W L7V 641
G
26
M21 L2V 937
G
27
M21 L2V 936
G
28
M21 L2V 938
G
29
T2W L7V 656
Parts No. Parts Name
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
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
79
Page 80
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
80
Page 81
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
Parts No. Parts Name
RoHS
M21 L2V 501
G
T2W L7V 301
G
T2W L7V 440
G
T2W L7V 451
G
M21 L2V 337
G
T2W L7V 424
G
T2W L2V 376
G
T2W L7V 377
G
M21 L7V 307
G
T2W L7V 398
G
M21 L2V 308
G
M21 L2V 309
G
PROPELLER OUTDOOR FAN MOTOR POWER BOARD ELECTRONIC CONTROL P.C. BOARD REACTOR NOISE FILTER P.C. BOARD TERMINAL BLOCK TERMINAL BLOCK GAS PIPE TEMPERATURE THERMISTOR R.V. COIL THERMISTOR SET AMBIENT TEMPERATURE 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
81
Page 82
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA -
1
14-5. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
18
19
17
16 13
12
15
22
23
21
20
14
2
5
82
6
10
9
7
8
11
4
1 2
3
Page 83
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA -
1
14-5. 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 2 1 2 3 1 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
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
Parts No.
RoHS
M21 0A2 232 M21 0A2 027 M21 L2V 010 M21 0A2 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 0A2 290 M21 0A2 644 M21 0A2 668 M21 0A6 667 M21 0A2 248 T2W L7V 642 M21 L2V 646 M21 L2V 402 M21 0A2 652 M21 L2V 297 M21 0A2 523 T2W 0A6 630 M21 L2V 249 T2W L7V 641 T2W L7V 959 M21 0A2 937 M21 0A2 936 M21 L2V 938 T2W L7V 656
Parts Name
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 STOP VALVE (LIQUID) 3/8 STOP VALVE (GAS) 5/8 REAR PANEL 4-WAY VALVE HIGH PRESSURE SWITCH EXPANSION VALVE LEV COIL TOP PANEL REAR GUARD HEAT EXCHANGER SIDE PANEL SERVICE PORT POWER RECEIVER CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE OIL SEPARATOR
Symbol
in Wiring
Diagram
MC
LEV C
LEV B
LEV A
HPS
LEV F
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) 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
83
Page 84
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA -
1
14-6. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
11 10
9
8
7
124356
84
Page 85
Symbol
in Wiring
Diagram
Q'ty/unit
Remarks
Parts No. Parts Name
MXZ-3A30NA -
1
M21 L2V 501 T2W L7V 301 M21 0A1 440 T2W 0A6 451 M21 L2V 337 M21 0A0 424 T2W 0A2 376 T2W L7V 377 T2W L7V 398 M21 L2V 308 M21 0A2 309
1 2 3 4 5 6 7 8
9 10 11
PROPELLER OUTDOOR FAN MOTOR POWER BOARD ELECTRONIC CONTROL P.C. BOARD REACTOR NOISE FILTER P.C. BOARD TERMINAL BLOCK TERMINAL BLOCK R.V. COIL THERMISTOR SET AMBIENT TEMPERATURE THERMISTOR
No.
G G G G G G G G G G G
RoHS
MF
L
TB2~4
TB1
21S4
RT61,62,68
RT65
1 1 1 1 1 1 3 1 1 1 1
PM8H60-
Indoor unit connecting
Including heat sink and RT64
Power supply
DEFROST, DISCHARGE, OUTDOOR HEAT EXCHANGER
20A 600µH
RoHS PARTS LIST (RoHS compliant)
MXZ-3A30NA -
1
14-6. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
Part numbers that are circled are not shown in the illustration.
85
Page 86
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 -
1
1
MXZ-2A20NA MXZ-2A20NA ­MXZ-3A30NA MXZ-3A30NA -
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
86
Page 87
87
Page 88
TM
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
CC
Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No. OB444 REVISED EDITION-B 9 Distributed in Jun. 2006. No. OB444 REVISED EDITION-A 8 Distributed in Mar. 2006. No. OB444 8 Made in Japan
New publication, effective May 2007 Specifications subject to change without notice.
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