Mitsubishi Electric MUZ-A09YV-E1 User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························7
5. OUTLINES AND DIMENSIONS ·························8
6. WIRING DIAGRAM ············································9
7. REFRIGERANT SYSTEM DIAGRAM··············11
8. PERFORMANCE CURVES······························12
9. ACTUATOR CONTROL····································21
10. SERVICE FUNCTIONS·····································22
11. TROUBLESHOOTING······································22
12. DISASSEMBLY INSTRUCTIONS·····················34
13. PARTS LIST······················································38
Wireless type
Models
No. OB328
REVISED EDITION-A
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
MUZ-A09YV -
MUZ-A12YV -
MUZ-A09YVH -
MUZ-A12YVH - E1
E1
E1
E1
MUZ-A09YV -
MUZ-A12YV -
MUZ-A09YVH -
MUZ-A12YVH - E1
E1
E1
E1
Indication of
model name
NOTE:
This service manual describes technical data of the outdoor units.
•As for indoor units MSZ-A09YV- and MSZ-A12YV- , refer to the service manual OB327.
•As for indoor unit MCFZ-A12WV- , refer to the service manual OB344.
E1
E1E1
HFC
utilized
R410A
Revision A:
●MUZ-A12YV- and MUZ-A12YVH-
can be connected to MCFZ-A12WV- .
●Some mistakes were corrected. E1
E1E1
Please void OB328.
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2
1TECHNICAL CHANGES
Refrigerating
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
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
-40.8
0.94
44.4
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 (:)
Steam pressure [25:](Mpa)
Saturated steam density [25:](Kg/K)
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
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
• This room air conditioner adopts an 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.
NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
New Specification Current Specification
The incompatible refrigerating 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
refrigerating oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigerating oil are compatible each,
refrigerating oil backs to the compressor through the lower
position oil back hole.
Compressor
Suction muffler
Oil back hole
Refrigerating oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigerating oil /Refrigerant
Compressor
Revision A:
•MUZ-A12YV- and MUZ-A12YVH- can be connected to MCFZ-A12WV- .
•Some mistakes were corrected. E1E1E1
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3
-30 -20 -10 0 10 20 30 40 50 60
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
(MPa [Gauge])
R410A
R22
Conversion chart of refrigerant temperature and pressure
Saturated liquid pressure
(:)
NOTE : The unit of pressure has been changed to MPa on the
international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
R410A tools Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges. Port diameters have been changed to prevent any other refrigerant
from being charged into the unit.
Hose material and cap size have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
6.35 mm and 9.52 mm
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 12.7 mm
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.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.
2.Refrigerant piping
1Specifications
Use the refrigerant pipes that meet the following specifications.
• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less
than 0.8mm, as the pressure resistance is insufficient.
Wall
thickness
Outside diameter
Pipe mm
For liquid
For gas
6.35
9.52
12.7
0.8 mm
0.8 mm
0.8 mm
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
Insulation material
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4
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)
R410A
Pipe diameter
mm
6.35
9.52
12.7
17
22
26
Dimension of flare nut
R22
17
22
24
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 refrigerating 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.
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5
PART NAMES AND FUNCTIONS
2
OUTDOOR UNIT
Air inlet
Air outlet
Drain outlet
Piping
Drain hose
(back and side)
ACCESSORIES
1Drain socket 1
MUZ-A09YV - E1
MUZ-A12YV - E1
OUTDOOR UNIT
Single phase
230V,50Hz
1900
3.90
0.24
KNB073FBVH
550
U-V 1.53 U-W 1.53
V-W 1.53
RA6V21-AA
WHT-BLK 347
BLK-RED 281
800o550o285
33
46
825
1
0.80
320 (NEO22)
32.6
13.4
17
10
Cooling
2.5 (0.9-3.2)
1.4
2.89
3.73
Heating
3.2 (0.9-5.0)
—
3.49
3.81
MUZ-A09YV - E1
E1
MUZ-A09YVH -
E1
MSZ-A09YV -
Indoor model E1
MSZ-A12YV -
Indoor model
Single phase
230V,50Hz
1900
5.00
4.57
0.24
KNB092FAAH
650
U-V 0.49 U-W 0.49
V-W 0.49
RA6V21-AA
WHT-BLK 347
BLK-RED 281
800o550o285
34
825
1
0.90
320 (NEO22)
32.6
13.4
17
10
Cooling
3.5 (1.0-4.1)
2.0
3.21
47
Heating
4.0 (0.9-6.0)
—
3.70
48
Outdoor model
Function
Power supply
Capacity Rated frequency(Min.~Max.)
Dehumidification
Air flow
Starting current ✽1
Compressor motor current ✽1
Fan motor current
Model
Output
Winding
resistance(at 20:)
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level
Fan speed
Fan speed regulator
Refrigerant filling
capacity(R410A)
Refrigerating oil (Model)
Thermistor RT61
(at 0:)
Thermistor RT62(at 100:)
Thermistor RT64(at 50:)
Thermistor RT65(at 25:)
kW
r/h
K/h
A
A
A
✽1
W
"
"
mm
kg
dB(A)
rpm
kg
cc
k"
k"
k"
k"
Compressor
Fan motor
Special remarks
Coefficient of performance(C.O.P)
Capacity
Electrical data
MUZ-A12YV - E1
E1
MUZ-A12YVH -
E1
MCFZ-A12WV -
Indoor model
Single phase
230V,50Hz
1900
5.00
4.46
0.24
KNB092FAAH
650
U-V 0.49 U-W 0.49
V-W 0.49
RA6V21-AA
WHT-BLK 347
BLK-RED 281
800o550o285
34
825
1
0.90
320 (NEO22)
32.6
13.4
17
10
Cooling
3.5 (1.0-4.1)
2.0
3.21
47
Heating
3.9 (0.9-5.9)
—
3.61
48
MUZ-A12YV - E1
E1
MUZ-A12YVH -
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor DB 27:WB 19:
Outdoor DB 35:WB(24:)
Heating : Indoor DB 20:WB 15:
Outdoor DB 7:WB 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency
3SPECIFICATION
MUZ-A09YV - MUZ-A12YV -
MUZ-A09YVH - MUZ-A12YVH - E1E1
E1E1
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6
OUTDOOR UNIT
Model
Item
Current transformer
Current transformer
Smoothing capacitor
Outdoor fan capacitor
Diode module
Fuse
Fuse
Defrost heater
Power transistor module
Expansion valve coil
Reactor
Current-detecting resistor
Current-detecting resistor
Current-limiting resistor
Solid state relay
Terminal block
Relay
Relay
Relay
R.V. coil
Heater protector
Outdoor fan motor thermal fuse
MUZ-A09YV - E1
(CT)
(CT761, CT781)
(
C62A, C62B, C61B )
(C65)
(DB61, DB65)
(F61)
(F71, F801)
(H)
(IPM)
(LEV)
(L61)
(R61)
(R831)
(
R64A, R64B )
(SR61)
(TB)
(X63)
(X64)
(X66)
(21S4)
(26H)
MUZ-A09YVH - E1 MUZ-A12YV - E1 MUZ-A12YVH - E1
ETQ19Z53AY
ETQ19Z71AY
680+ 420V
1.8+ 440V
D25XB60
250V 20A
250V 3.15A
PS21244A
CAD-MD12ME 12VDC
10A 23.0mH
25m"5W
5.1"10W
G3MB
3P
G5N-1a/G5NB-1a
G4A-1A-PS
LD30013
Open 152:
—
—
—
230V 130W
G5N-1a/G5NB-1a
Open 45:
—
—
—
230V 130W
G5N-1a/G5NB-1a
Open 45:
45m"5W 50m"5W (2 elements)
Specifications and rating conditions of main electric parts
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7
NOISE CRITERIA CURVES
4
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB(A)) LINE
High
SPEED
HEATING
46
46
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
MUZ-A09YV -
MUZ-A09YVH - E1
E1
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION SPL(dB(A)) LINE
High
FAN SPEED
HEATING
47
48
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OUTDOORUNIT
MICROPHONE
1m
MUZ-A12YV -
MUZ-A12YVH - E1
E1
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8
5OUTLINES AND DIMENSIONS
10
69
800
302.5
500 Bolt pitch for installation
150
22.3
Handle
550
280
164.5
99.5
170.5
23 Service panel
Service port
285
344.5
44
400
Air in
Air out
Air in
17.5
Bolt pitch for
installation
304~325
40
Liquid refrigerant pipe joint
Refrigerant pipe (flared) [6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) [9.52
43-
35-
2 holes 10o21
Drain hole [33 (MUZ-A09/A12YVH)
Drain hole [42 (MUZ-A09/A12YV)
REQUIRED SPACE Basically open 100mm or more
without any obstruction in front
and on both sides of the unit.
350mm or more
200mm or more
100mm or more
100mm or more
Open two sides of left,
right, or rear side.
Unit: mm
OUTDOOR UNIT
MUZ-A09YV - MUZ-A12YV -
MUZ-A09YVH - MUZ-A12YVH - E1E1
E1E1
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9
WIRING DIAGRAM
6
OUTDOOR UNIT
WHT
R64A
WHT BLU
BLU
RED
N
TO INDOOR UNIT
CONNEC- TING
230V~
12V
2 3
GRN/YLW
TB
R64B
R831
3
CN771 CN800
CN642
421
INVERTER P.C. BOARD
CN641
213
CN601
3
CN643
2
112
7
POWER P.C. BOARD
RT61RT62 RT64
RT65
GRN F71
CT
LDE
NR61
TR821
DB65
6
LEV
C N
7 2 4
IC801
SR61C65 1
2 1
CN721
X63
21S4
MF
2
1 2 3
BLK
TAB62
3
X64
L62
TAB61
F61
DSA
L63
T801
BLK
BLU
C62A C62B
BLU
LD70
DB61
LD69
4
TAB63
BLK
L61
P
W
V U
N
R61
2
CT761
CT781
IPM CN61
U
WMC
WHT
BLK
V
RED
RED BLK WHT 1
3
LD-U LD-W
LD-V
C61B F801
C N
7 2 6
C N
7 2 5
+++
SYMBOL CT,CT761,CT781 C62A,C62B,C61B C65 DB61,DB65 DSA F61 F71,F801 IC801 IPM
SYMBOL LEV L61 L62,L63 MC MF NR61 RT61 RT62 RT64
SYMBOL RT65 R61,R831 R64A,R64B SR61 TB TR821 T801 X63,X64 21S4
NAME
CURRENT TRANSFORMER SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR DIODE MODULE SURGE ABSORBER FUSE (20A) FUSE (3.15A) INTELLIGENT POWER DEVICE POWER TRANSISTOR MODULE
NAME
EXPANSION VALVE COIL REACTOR CMC COIL COMPRESSOR
OUTDOOR FAN MOTOR (INNER FUSE) VARISTOR DEFROST THERMISTOR DISCHARGE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR
NAME
AMBIENT TEMPERATURE THERMISTOR CURRENT-DETECTING RESISTOR CURRENT-LIMITING RESISTOR SOLID STATE RELAY TERMINAL BLOCK SWITCHING POWER TRANSISTOR TRANSFORMER RELAY R.V. COIL
NOTE:1. About the indoor side electric wiring refer to
the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring) 3. Symbols below indicate.
/: Terminal block, : Connector
MODELS WIRING DIAGRAM
MUZ-A09YV -
MUZ-A12YV - E1
E1
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10
OUTDOOR UNIT
MUZ-A09YVH -
MUZ-A12YVH - E1
E1
WHT
R64A
WHT BLU
BLU
RED
N
230V~
12V
2 3
GRN/YLW
TB
R64B
26H
H
RED
BLK
2 1
BLK BLK
BLK BLK
BLKBLK
YLW
2 1
BLU BLU
BLK
GRN
TAB62
F71
CT 3
X64
L62
TAB61 LDE
F61
DSA
NR61
L63
T801
BLK
C62A C62B
TR821
LD70
DB61
DB65
LD69
4
TAB63
R831
BLK
L61
P
W V U
N
R61
6LEV
2
CT761
CT781
IPM CN61
U
MC
W
WHT
BLK
V
RED
RED BLK WHT 1
3
LD-U LD-W
LD-V
C61B F801
IC801
CN722
3 2 1X66 SR61C65 1
2 1
CN721
X63
21S4
MF
2 3
CN771 CN800
1 2 3
CN642
421
INVERTER P.C. BOARD
CN641
21
3
CN601
3
CN643
2
1
RT65 RT61RT62 RT64
12
7
SYMBOL CT,CT761,CT781 C62A,C62B,C61B C65 DB61,DB65 DSA F61 F71,F801 H IC801 IPM
SYMBOL LEV L61 L62,L63 MC MF NR61 RT61 RT62 RT64 RT65
SYMBOL R61,R831 R64A,R64B SR61 TB TR821 T801 X63,X64,X66 21S4 26H
NAME
CURRENT TRANSFORMER SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR DIODE MODULE SURGE ABSORBER FUSE (20A) FUSE (3.15A) DEFROST HEATER INTELLIGENT POWER DEVICE POWER TRANSISTOR MODULE
NAME
EXPANSION VALVE COIL REACTOR CMC COIL COMPRESSOR
OUTDOOR FAN MOTOR (INNER FUSE) VARISTOR DEFROST THERMISTOR DISCHARGE TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR AMBIENT TEMPERATURE THERMISTOR
NAME
CURRENT-DETECTING RESISTOR CURRENT-LIMITING RESISTOR SOLID STATE RELAY TERMINAL BLOCK SWITCHING POWER TRANSISTOR TRANSFORMER RELAY R.V. COIL HEATER PROTECTOR
POWER P.C. BOARD
C N
7 2 4
+++
C N
7 2 5
C N
7 2 6
TO INDOOR UNIT
CONNEC- TING
NOTE:1. About the indoor side electric wiring refer to
the indoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring) 3. Symbols below indicate. /: Terminal block, : Connector
MODELS WIRING DIAGRAM
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