Mitsubishi MUX-A22WV User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················4
3. INDOOR / OUTDOOR
CORRESPONDENCE TABLE ···························5
4. SPECIFICATION·················································5
5. NOISE CRITERIA CURVES·······························6
6. OUTLINES AND DIMENSIONS ························ 6
7. WIRING DIAGRAM ············································7
8. REFRIGERANT SYSTEM DIAGRAM················8
9. PERFORMANCE CURVES································9
10. MICROPROCESSOR CONTROL ····················15
11. TROUBLESHOOTING······································15
12. DISASSEMBLY INSTRUCTIONS·····················21
13. PARTS LIST······················································23
Multi system type
Model
MUX-A22WV - E1
MUX-A22WV - E1
No. OB318
HFC
utilized
R410A
SPLIT-TYPE, AIR CONDITIONER
Indication of
model name
NOTE:
•This manual describes technical data of outdoor unit.
•As for indoor unit MSC-A07WV - or MSC-A12WV - ,
refer to the service manual OB307 REVISED EDITION-A.
E1E1
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2
TECHNICAL CHANGES
1
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 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
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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
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”.
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4
PART NAMES AND FUNCTIONS
2
OUTDOOR UNIT
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
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.
Air outlet
Drain outlet
Air inlet
Piping
Drainage hose
(Back and side)
MUX-A22WV- E1
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5
MUX-A22WV- E1
Combination
of the
connectable
indoor units
OUTDOOR UNIT
A: MSC-A12WV- E1
B:
MSC-A07WV- E1
C:
INDOOR / OUTDOOR CORRESPONDENCE TABLE3
MUX-A22WV - E1
Capacity
Dehumidification
Outdoor air flow
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Starting current
Compressor motor current
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)
kW
R/h
K/h
A
A
W
A(kW)
%
A
A
A
W
"
"
mm
kg
dB
rpm
kg
cc
Cooling
Single phase
230V,50Hz
Double
A+B or A+C
3.5+2.4
1.4+0.9
2,460
20
8.92
1,975
—
96.3
48
8.01
0.57
2.88
MC1 : RN145VHSHT, MC2 : RN092VHSHT
MC1 : 1,000, MC2 : 600
RA6V60-GA
WHT-BLK 90
BLK-RED 146
840O640O330
67
52
730
1
0.85 (Room A)
0.85 (Room B+C)
MC1 : 620 (NEO22), MC2 : 350 (NEO22)
MUX-A22WV - E1
Compressor Electrical
data
Fan motor
Special remarks
Capacity
Coefficient of performance (C.O.P)
Outdoor unit power supply
Indoor unit No.Single
A
3.5
1.4
5.73
1,280
97.1
5.02
2.65
Single
B or C
2.4
0.9
3.64
815
97.3
2.99
2.82
Double
B+C
1.45O2
0.4
3.69
830
97.8
2.99
3.22
Triple
A+B+C
3.4+1.45O2
1.4+0.4
8.84
1,980
97.4
8.01
3.01
C-R 2.43
C-S 3.80
MC1 : , MC2 : C-R 3.87
C-S 0.14
Outdoor model
Function
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB24°C
Indoor-Outdoor piping length 5m
wReference value
SPECIFICATION
4
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6
NOISE CRITERIA CURVES5
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
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 :DB35:WB24:
COOL
FUNCTION
52
SPL(dB(A)) LINE
MUX-A22WV - E1
OUTLINES AND DIMENSIONS
6
MUX-A22WV- E1
OUTDOOR UNIT
500
840 61
264
10°
10°
Service panel
Open as a rule
500mm or more if
the front and both
sides are open
100mm or more
200mm or more if
there are obstacles
to both sides
Open as a rule
500mm or more if the back,
both sides and top are open 350mm or more
100mm or more
B UNIT
A UNIT
Gas refrigerant
pipe joint
Refrigerant pipe (flared)
Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) {6.35
65
121
40
438
Air in
Air out
Air in
273
100
125
320
30
330
640
360
76
5050505050
Drainage
3holes {33
}
C UNIT
}
}
34
C or B unit {9.52
A unit {12.7
Unit: mm
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7
WIRING DIAGRAM
7
1 2 3
1 2 3
123
2 1 3
123123123
21R421R3
NR61
T61
1 2
43
43
C61
LD1
WHT
WHT
OUTDOOR CONTROL P.C. BOARD
BRN
BLU
BRN
BLU
BRN
BLU
BLU
X522 X521
BLK
SR865
SR866
SR863
SR861
LD2
RED
RED
RED
BLK
WHT
652341
BRN
BLU
BLU
TB4
CN86
CN85
CN81
CN91
CN90
TB3 TB2
X521
BLU
BLU
X522
BLU
BLU
21RB
F61
CN74 CN73 CN71
TO INDOOR UNIT B CONNECTING 12V
PE
CIRCUIT BREAKER
GRN/YLW
WHT BLU ORN BLU YLW BLU RED
RED
TO INDOOR UNITA CONNECTING 12V
1 2 1 2
C2
C1
RC
S
CR
S
MC2
TO INDOOR UNIT C CONNECTING 12V
MF61
MC1
BLK
TB1
POWER SUPPLY ~/N 230V 50Hz
1 2
L N
DSAR
BRN
OUTDOOR UNIT
SYMBOL
MF61 NR61
SR861 SR863 SR865 SR866
TB1
SYMBOL
C1 C2
C61
DSAR
F61
MC1 MC2
NAME NAME NAME
COMPRESSOR CAPACITOR(MC1) COMPRESSOR CAPACITOR(MC2) OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE(3.15A) COMPRESSOR(INNER PROTECTOR) COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR) SURGE ABSORBER OUTDOOR FAN RELAY RELAY (21RB) RELAY (C) (21R4) RELAY (B) (21R3) TERMINAL BLOCK
TERMINAL BLOCK TRANSFORMER
COMPRESSOR CONTACTOR(MC1) COMPRESSOR CONTACTOR(MC2) SOLENOID COIL SOLENOID COIL (B) SOLENOID COIL (C)
SYMBOL
TB2~TB4
T61
X521
X522
21RB
21R3
21R4
VG79B520H01
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
MUX-A22WV - E1
MODEL WIRING DIAGRAM
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8
MUX-A22WV- E1
Unit : mm
OUTDOOR UNIT
INDOOR UNIT
UNIT A
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
UNIT B
Indoor
heat
exchanger
Outdoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
(With insulation)
Refrigerant pipe
12.7
(With insulation)
Refrigerant pipe
9.52
(With insulation)
Refrigerant pipe
6.35
Flared connection
(With insulation)
Refrigerant pipe
6.35
Flared connection
Refrigerant pipe
9.52
(With insulation)
Refrigerant pipe
6.35
Flared connection
Stop valve
with service port
Stop valve
Solenoid valve
21R3
Solenoid valve
21R4
Solenoid
valve
21RB
Stop valve
with
service port
Stop valve
with
service port
Capillary tube CT1
Capillary tube CT3
Capillary tube CT4
Capillary tube CT2
Capillary tube CT5
Compressor(A)
Compressor(B,C)
Refrigerant flow in cooling
UNIT C
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Room
temperature
thermistor
RT11
Stop
valve
Stop
valve
Strainer
#100
Muffler
Muffler
[3.0 x [1.6 x 900
[3.0 x [1.4 x 1000
[3.0 x [1.6 x 900
[3.0 x [1.6 x700
[3.0 x [1.6 x 900
Strainer
#100
Strainer
#100
REFRIGERANT SYSTEM DIAGRAM
8
LA
Indoor unit A
HL
BHLCH
Indoor unit B Indoor unit C
Outdoor unit
MUX-A22WV - E1
MUX-A22WV- E1
MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE
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9
Outdoor unit
precharged
850g
Refrigerant piping length (one way)
Unit B + Unit C Outdoor unit
precharged
850g
Refrigerant piping length (one way, 2 unit total)
ADDITIONAL REFRIGERANT CHARGE (R410A:g)
Max.
limits
UNIT No.
Unit A
Unit B
Unit C
Pipe length
15m
15m Total
30m
LB
+
LC
15m
LA
LB
LC
Height difference (H)
10m
10m
10m
No. of bends
10
10 Total
15
10
PIPING PREPARATION
1Table below shows the specifications of pipes commercially available.
2Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3Refrigerant bending radius must be 100mm or more.
Unit A 7m
0
8m
20
9m
40
10m
60
11m
80
12m
100
13m
120
14m
140
15m
160
10
m11 m12 m13 m14 m15 m16 m17 m18 m19 m20 m21 m22 m23 m24 m25 m26 m27 m28 m29 m30 m
0 102030405060
70 80 90 100 110 120 130 140 150 160 170 180 190 200
UNIT No. Insulation
thickness
Pipe
For liquid
For gas
For liquid
For gas
Outside diameter
mm
6.35
12.7
6.35
9.52
8mm
8mm
8mm
8mm
Insulation material
Heat resisting foam plastic
0.045 specific gravity
Unit A
Unit B and Unit C
9
The standard data contained in these 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 pro-
vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
(1) GUARANTEED VOLTAGE
198~264V, 50Hz
(2) AIR FLOW
Air flow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature : °CWB
(2) Indoor outlet air wet-bulb temperature : °CWB
(3) Outdoor intake air dry-bulb temperature : °CDB
(4) Total input: W
Indoor air wet/dry-bulb temperature difference on the left side of the chart on page 10 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.
PERFORMANCE CURVES
MUX-A22WV - E1
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10
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 to start the EMERGENCY COOL MODE.
6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.
7. 10 minutes later, measure temperature again and check that the temperature does not change.
INDOOR UNIT OUTDOOR UNIT
Wet-and dry-bulb
thermometers Wet-and dry-bulb
thermometers
Indoor air WB temperature difference (deg.)
5.6
6.3
7.1
7.8
8.6
9.4
MUX-A22WV- E1
(MSC-A07WV- E1 )
6.1
6.9
7.7
8.5
9.4
10.2
MUX-A22WV- E1
(MSC-A12WV- E1 )
B or C
A
9-1.CAPACITY AND THE INPUT CURVES
(ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)
70
Dry-bulb temperature Relative humidity (%)
50
60
20
25
30
9-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
COOL operation
①Both indoor and outdoor unit are under
same temperature/humidity condition.
➁Air flow should be set at MAX.
③The 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] )
Single operation (Unit B or C)
Outdoor unit current (A)
2.0
2.5
3.0
3.5
4.0
230V
230V
1.3
1.1
1.0
0.9
0.8
0.7
Outdoor low pressure (kgf/F[Gauge])
11
10
9
8
7
13
1.2
12
(kgf/F[Gauge])(MPa[Gauge])
Ambient temperature(˚C)
Ambient humidity(%)
20
50 25
60 30 70 (˚C) (%) Ambient temperature(˚C)
Ambient humidity(%)
20
50 25
60 30 70 (˚C) (%)
1.2
1.0
0.9
0.8
0.7
0.6
(kgf/F[Gauge])(MPa[Gauge])
Outdoor low pressure (kgf/F[Gauge])
10
9
8
7
6
12
1.1
11
Outdoor unit current (A)
Single operation (Unit A)
4.0
5.0
6.0
7.0
230V
230V
Ambient temperature(˚C)
Ambient humidity(%)
20
50 25
60 30 70 (˚C) (%) Ambient temperature(˚C)
Ambient humidity(%)
20
50 25
60 30 70 (˚C) (%)
MUX-A22WV- E1
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