Mitsubishi MUZ-A09NA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································6
4. OUTLINES AND DIMENSIONS ·······················10
5. WIRING DIAGRAM···········································11
6. REFRIGERANT SYSTEM DIAGRAM··············15
7. DATA·································································17
8. ACTUATOR CONTROL····································30
9. SERVICE FUNCTIONS ····································31
10. TROUBLESHOOTING······································31
11. DISASSEMBLY INSTRUCTIONS·····················59
12. PARTS LIST······················································66
12-1. PARTS LIST·············································66
12-2. RoHS PARTS LIST··································72
13. OPTIONAL PARTS ·························BACK PAGE
Wireless type
Models
MUZ-A09NA MUZ-A09NA-
MUZ-A12NA MUZ-A12NA-
MUZ-A15NA MUZ-A15NA-
MUZ-A17NA MUZ-A17NA-
MUZ-A24NA MUZ-A24NA-
MUY-A15NA
MUY-A17NA
MUY-A24NA
U1
U1
U1
U1
U1
No. OB451
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
OUTDOOR UNIT
Indoor unit service manual
MSZ-A•NA Series (OB450)
MUZ-A09NA MUY-A15NA
MUZ-A12NA MUY-A17NA
MUZ-A15NA
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 PARTS
LIST (RoHS compliant).
TM
HFC
utilized
R410A
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2
1TECHNICAL CHANGES
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
• 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.
1As 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.
2Take 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.
3For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
MUZ09UN ➔MUZ-A09NA
MUZ12UN ➔MUZ-A12NA
MUH15TN ➔MUZ-A15NA
MUH17TN ➔MUZ-A17NA
MUH24WN ➔MUZ-A24NA
MU15TN ➔MUY-A15NA
MU17TN ➔MUY-A17NA
MU24WN ➔MUY-A24NA
1. Outdoor unit model has been changed.
2. Control method between indoor and outdoor unit has been changed.
3. Refrigerant has been changed. (R22 ➔R410A)
4. Fan motor has been changed. (AC ➔DC)
5. Compressor has been changed. (AC ➔DC)
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/ft3)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO2
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3
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 R410Awith 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
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
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 each,
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)
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4
R410A
Pipe diameter
inch
1/4
3/8
1/2
5/8
17 (11/16)
22 (7/8)
26 (1-1/32)
29 (1-5/32)
Dimension of flare nut
R22 mm(in)
17 (11/16)
22 (7/8)
24 (15/16)
27 (1-1/16)
2Flaring 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”.
3.Refrigerant 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.
2.Refrigerant piping
1Specifications
Use the copper or copper-alloy seamless pipes for refrigerant that meet the following specifications.
Wall thickness (in)
Outside diameter(in)
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 in
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)
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5
PART NAMES AND FUNCTIONS
2
Air outlet
Drain outlet
Piping
Drain hose
Air inlet
(back and side)
MUZ-A09NA MUZ-A15NA MUY-A15NA
MUZ-A12NA MUZ-A17NA MUY-A17NA MUZ-A24NA
MUY-A24NA
Piping
Air outlet
Drain hose
Drain outlet
Air inlet
(back and side)
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6
3SPECIFICATION
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: A09:50Hz A12:76Hz
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: A09:61Hz A12:76Hz
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: A09:71Hz A12:76Hz
Item Model MSZ-A12NA
Capacity
Rated(Minimum~Maximum)
Capacity Rated
Power consumption
Rated(Minimum~Maximum)
Power consumption Rated
EER [SEER]
HSPF IV(V)
COP
OUTDOOR UNIT MODEL
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
Refrigerant pipe size
(Min. wall thickness)
Connection method
Between the indoor
& outdoor units
Refrigerant charge (R410A)
Refrigerating oil (Model)
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.
Ib.
in.
in.
ft.
ft.
cc.
Munsell 3Y 7.8/1.1
208/230, 1, 60
15
12
0.52
KNB092FPAH
0.49
7.8
9.2
Liner expansion valve
48
Reverse cycle
31-1/2
11-1/4
21-5/8
82
Wireless type
12-24V DC
Not supplied
1/4 (0.0315)
3/8 (0.0315)
Flared
Flared
40
65
2lb.5oz.
320 (NE022)
9,000 (5,500~9,000)
10,900 (5,200~12,600)
7,700
690 (390~690)
860 (350~1,100)
880
13.0 [17.0]
8.2 (6.7)
3.71
12,000 (5,700~12,000)
13,600 (5,200~13,600)
8,300
1,170 (395~1,170)
1,160 (350~1,160)
930
10.3 [17.0]
8.2 (6.7)
3.44
MUZ-A09NA MUZ-A12NA
❈1❈3
❈1
❈1
❈2
❈1❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
MSZ-A09NA
Model
Winding resistance (at 68˚F) Ω
W
D
H
Liquid
Gas
Indoor
Outdoor
Height difference
Piping length
❈1
❈1
❈4
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7
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: A15:77Hz A17:89Hz
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: A15:78Hz A17:88Hz
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: A15:93Hz A17:93Hz
Item Model
Capacity
Rated(Minimum~Maximum)
Capacity Rated
Power consumption
Rated(Minimum~Maximum)
Power consumption Rated
EER [SEER]
HSPF IV(V)
COP
OUTDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor
Compressor
Refrigerant control
Sound level dB(A)
Defrost method
Dimensions
Weight
REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING
Refrigerant pipe size
(Min. wall thickness)
Connection method
Between the indoor
& outdoor units
Refrigerant charge (R410A)
Refrigerating oil (Model)
Btu/h
Btu/h
Btu/h
W
W
W
V, phase, Hz
A
A
F.L.A
R.L.A
L.R.A
in.
in.
in.
Ib.
in.
in.
ft.
ft.
cc.
16,200 (3,100~16,200)
–
–
2,070 (210~2,070)
–
–
7.8 [16.0]
–
–
16,200 (3,100~16,200)
20,100 (3,400~20,900)
13,000
2,070 (210~2,070)
2,150 (250~2,330)
1,740
7.8 [16.0]
8.2 (6.7)
2.74
15,000 (3,100~15,000)
18,000 (3,400~20,900)
13,000
1,690 (210~1,690)
1,790 (250~2,330)
1,740
8.9 [16.0]
8.2 (6.7)
2.95
50
51 50 —52 53 52 —
15,000 (3,100~15,000)
–
–
1,690 (210~1,690)
–
–
8.9 [16.0]
–
–
❈1❈3
❈1
❈1
❈2
❈1❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
Model
Winding resistance (at 68°F) "
Cooling
Heating
W
D
H
Liquid
Gas
Indoor
Outdoor
Height difference
Piping length
MSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NA
MUZ-A15NA MUY-A15NA MUZ-A17NA MUY-A17NA
❈1
❈1❈1
❈4
Munsell 3Y 7.8/1.1
208/230, 1, 60
15
14
0.52
SNB130FPDH
0.45
10.1
12.0
Liner expansion valve
Reverse cycle
31-1/2
11-1/4
21-5/8
88
Wireless type
12-24V DC
Not supplied
1/4 (0.0315)
1/2 (0.0315)
Flared
Flared
40
65
2lb.7oz.
450 (NE022)
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NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions(cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: 110Hz
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: 101Hz
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: 108Hz
Item Model MSY-A24NA
Capacity
Rated(Minimum~Maximum)
Capacity Rated
Power consumption
Rated(Minimum~Maximum)
Power consumption Rated
EER [SEER]
HSPF IV(V)
COP
OUTDOOR UNIT MODEL
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
Refrigerant pipe size
(Min. wall thickness)
Connection method
Between the indoor
& outdoor units
Refrigerant charge (R410A)
Refrigerating oil (Model)
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.
Ib.
in.
in.
ft.
ft.
cc.
Munsell 3Y 7.8 1.1
208/230, 1, 60
20
17
0.93
SNB130FPDH
0.45
10.1
16.0
Liner expansion valve
55
Reverse cycle
33-1/16
13
33-7/16
128
Wireless type
12-24VDC
Not supplied
1/4 (0.0315)
5/8 (0.0394)
Flared
Flared
50
100
4lb.
450 (NE022)
22,000 (4,400~22,000)
23,200 (3,600~24,400)
15,200
2,880 (290~2,880)
2,350 (260~2,570)
1,960
7.6 [16.0]
8.2 (6.7)
2.89
22,000 (4,400~22,000)
—
—
2,880 (290~2,880)
—
—
7.6 [16.0]
—
—
❈1❈3
❈1
❈1
❈2
❈1❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
MSZ-A24NA
MUZ-A24NA MUY-A24NA
Model
Winding resistance (at 68˚F) Ω
W
D
H
Liquid
Gas
Indoor
Outdoor
Height difference
Piping length
❈1
❈1
❈4
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9
Test condition
SEER
(Cooling)
HSPF
(Heating)
ARI
Mode
"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 Speed❈5
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
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
Frost Accumulation
at Intermediate compressor Speed❈5
95
82
82
67
87
47
17
62
47
35
35
(75)
(65)
(65)
(53.5)
(69)
43
15
56.5
43
33
33
❈5 : At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".
(Unit : [˚F])
❈3, ❈4
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10
4OUTLINES AND DIMENSIONS
Liquid pipe :1/4 (flared)
Gas pipe :3/8 (flared) · · · MUZ-A09/12NA
:1/2 (flared) · · · MUZ-A15/17NA, MUY-A15/17NA
6-23/32
2
5-7/8
2-23/32
1-3/4
15-3/4
12 ~ 12-3/4
13-9/16
11/16
1-9/16
7/8
21-5/8
11-1/32
13/32
31-1/2
19-11/16
5-15/16
11-29/32
17/3229/32 11-1/4
Air in
handle
Air in
Air out
2- 3/8 o 13/16 Oval hole
Drainage hole [1-5/8
{
REQUIRED SPACE
Basically open 4inch or more
without any obstruction in front
and on both sides of the unit.
14 in. or more
8 in.or more
4 in. or more
4in.or more
Open two sides of left,
right, or rear side.
Unit: inch
MUZ-A09NA MUZ-A12NA MUZ-A15NA
MUZ-A17NA MUY-A15NA MUY-A17NA
MUZ-A24NA MUY-A24NA
30-
35-
6-1/28
3-17/32
7-25/32
1-9/16
20-9/32
11-25/32
2-19/32
2
14-3/16
33-7/16
16-15/16
19-11/16
3-3/16
4-25/32
33-1/16
Open as a rule
20inch or more if
the front and both
sides are open
4inch or more
8inch or more if
there are obstacles
to both sides
Open as a rule
20inch or more if the back,
both sides and top are open
14in. or more
4in. or more
Air in
Air out
13
Service panel
Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [5/8
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [1/4
Drainage hole [1-5/8
4-3/8 o 13/16 Oval hole
REQUIRED SPACE
Air in
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