Mitsubishi Electric MS09NW Operating manual

TECHNICAL & SERVICE MANUAL
DUCTLESS SPLIT-TYPE AIR CONDITIONERS
CONTENTS
1. FEATURES·························································2
2. TECHNICAL CHANGES ····································3
3. PART NAMES AND FUNCTIONS······················3
4. SPECIFICATIONS ··············································4
5. DATA···································································5
6. OUTLINES AND DIMENSIONS ·························9
7. WIRING DIAGRAM ··········································10
8. REFRIGERANT SYSTEM DIAGRAM··············11
9. TROUBLESHOOTING······································12
10. DISASSEMBLY INSTRUCTIONS·····················14
11. PARTS LIST······················································17
12. OPTIONAL PARTS ····································BACK
Wireless type
Models
MS09NW✕2 MS15NN✕1 • MUM30NN
No.OB204
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
R
NOTE:For parts list, please refer to the following manuals.
MS09NW ➝ OB192
MS15NN ➝ OB192
OB204-1.qxp 25/9/97 6:34 PM Page 1

2
1 FEATURES
1.SPACE-SAVING LAYOUT
Two or three indoor units are served by a single outdoor unit whose installation requires only minimum space. This allows
equipment installed outside the house to be arranged in a neat, space-saving layout.
2.FLEXIBLE INSTALLATION OF INDOOR UNITS
Each indoor unit can be connected to piping up to 65 feet in length, providing plenty of freedom in determining the best loca-
tions for installation.
MUM30EN
LCD Wireless
remote controller
MS09NW MS15NN
MS09NW
3.AUTO-RESTART FUNCTION
The auto restart function restarts the equipment when power is
restored following an outage automatically. Operation resumes
in the mode in which the equipment was running immediately
before the outage.
HIGH PERFORMANCE ROTARY COMPRESSOR
The advanced design of Mitsubishi Electric’s powerful and ener-
gyefficient rotary compressor results in lower operating costs
and longer service life.
Cooling Capacity (BTU/h)
1 Indoor Unit Operation
2 Indoor Unit Operatin
3 Indoor Unit Operation
8,200
—
—
8,200
8,200
—
8,100
MS09NW
—
8,200
—
8,200
—
8,200
8,100
MS09NW
—
—
12,400
—
12,400
12,400
12,200
Operation Indoor unit MS15NN
This “3 to 1” Multi system (MSM30EN) consists of a single outdoor unit with three compressors that permit up to three
indoor units to be installed separate rooms, each with its own controller.
OB204-1.qxp 25/9/97 6:34 PM Page 2

3
2 TECHNICAL CHANGES
3 PART NAMES AND FUNCTIONS
OUTDOOR UNIT
MUM30NN
MSM30EW ➔ MSM30NW
1. Indoor unit has been changed.
2. Outdoor unit has been changed.
3. Remote controller has been changed.
(The timer function has been changed to the clock timer function.)
4. Indoor auto vave has been adopted.
5. Fan speed control has changed.
(MF1/MF2 : 1.Lo/Lo➔Stop/Hi 2.Me/Me➔Me/Me 3.Hi/Hi➔Hi/Hi)
6. The relay “X64” has been added to electric circuit.
7. Surge absorber has been added to electric circuit.
OB204-1.qxp 25/9/97 6:34 PM Page 3

4
4 SPECIFICATIONS
Model
Cooling capacity w1 BTU/h
w1 WPower consumption
EER (Triple unit operation)
SEER (Triple unit operation)
INDOOR UNIT MODEL
Extenal finish
Power Supply V, Hz, Phase
A
F.L.A
CFM
CFM
(Pints/h)
in.
in.
in.
in.
lbs.
V, Hz, Phase
A
F.L.A
Winding resistance (at 68˚F) "
Model
W
D
H
W
D
H
Dry
Wet
Liquid
Gas
Indoors
Outdoors
Height difference
Piping length
R.L.A
L.R.A
in.
in.
in.
in.
in.
ft
ft
lbs.
Max. fuse size (time delay)
Min. ampacity
Fan motor
Airflow
Lo-Me-Hi
Moisture removal
Cond. drain connection OD
Dimensions
Weight
OUTDOOR UNIT MODEL
External fnish
Power supply
Max. fuse sizu (time delay)
Min. ampacity
Fan motor
Compressor
Refrigerant control
Dimensions
Weight
REMOTE CONTROLLER
Control voltage (be built-in transformer)
REFRIGERANT PIPING
Pipe size
Connection
method
Between the
indoor &
outdoor units
Items
MSM30NN
Triple-Unit
A+B+C
28,400
2,990
DoubIe-Unit
A+B A+C or B+C
16,400 20,600
1,860 9.9
10.0
2,060
C: MS15NN
White
A & B: MS09NW
White
115,60,1
15.0
0.5 0.6
0.37 0.43
208-265-328 360-395-452
177-226-279 314-342-392
1.0 1.5
5/8 5/8
32-1/16 39-15/16
7-3/16 7-1/2
12-5/8
18 31
MUM30NN
Munsell 5Y 7/1
208/230,60,1(3-wire)
30
25
0.8+0.7
KH122WEV<115V> RH167NAB<208/230V>
C-R 0.97 C-S 4.81 C-R 2.47 C-S 4.62
10 8
37 29
Capillary tube
37-7-16
15-3/8
45-5/16
240
Wireless type
DC12V
Not supplied (optional parts)
1/4 1/4
3/8 5/8
Flared Flared
Flared Flared
Max. 25 Max. 25
Max. 65 Max. 65
Notes w1. Rating conditions (cooling) — Inddor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, 75˚FWB
Operating Range
Cooling Maximum
Maximum
Indoor air intake temperature
90˚FDB,71˚FWB
67˚FDB,57˚FWB
Outdoor air intake temperature
115˚FDB
67˚FDB
Single-Unit
A or B C
990
8,200 12,400
1,220
10-13/16
OB204-1.qxp 25/9/97 6:34 PM Page 4

5
5 DATA
Models
Indoor air Outdoor intake air DB temperature(˚F)
MS09NW
MS15NN
71
67
63
71
67
63
TC
10.05
9.51
8.94
15.19
14.38
13.52
SHC
5.89
6.85
7.63
8.76
10.21
11.40
TPC
0.88
0.83
0.79
1.09
1.03
0.98
TC
9.39
8.86
8.28
14.20
13.39
12.52
SHC
5.51
6.38
7.07
8.19
9.51
10.56
TPC
0.97
0.92
0.88
1.19
1.13
1.08
TC
8.82
8.20
7.71
13.33
12.40
11.66
SHC
5.17
5.90
6.58
7.69
8.80
9.83
TPC
1.04
0.99
0.95
1.28
1.22
1.17
TC
8.20
7.63
7.01
12.40
11.53
10.60
SHC
4.81
5.49
5.98
7.15
8.19
8.94
TPC
1.09
1.05
1.01
1.35
1.29
1.24
TC
7.54
7.01
6.40
11.41
10.60
9.67
SHC
4.43
5.05
5.46
6.58
7.53
8.16
TPC
1.14
1.10
1.05
1.40
1.35
1.29
IWB
(˚F)75 85 95 105 115
Notes 1. IWB : Intake air wet-bulb temperature
TC : Total Capacity (x103 Btu/h), SHC : Sensible Heat Capacity (x103 Btu/h)
TPC : Total Power Consumption (kW)
2. SHC is based on 80˚F of indoor intake air DB temperature.
MODEL Refrigerant piping length (one way)
MS-09NW 1.0
25ft (std)
0.954
40ft
0.927
49ft
2) COOLING CAPACITY CORRECTIONS
MS09NW✕2 MS15NN✕1
MUM30NN
1.PERFORMANCE DATA(ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)
1) COOLING CAPACITY
65
0.6
0.8
1.0
1.2
6
8
10
12
75 85 95 105 115
Outdoor intake air DB temperature (-F)
Total power consumption (kW) Total capacity (o 103Btu/h)
Cooling capacity
SHF at rating condition = 0.72
Airflow = 279CFM
Bypass Factor = 0.24
Indoor intake air WB temperature (-F)
Indoor intake air WB temperature (-F)
63
67
71
63
67
71
NOTE :
Total capacity = multiply cooling capacity in specifications table on page 4 by capacity correction factor on this page.
Total power consumption = multiply power consumption in specifcations table on page 4 by power correction factor on this
page.
65
1.0
1.2
1.4
1.6
10
12
14
16
75 85 95 105 115
Outdoor intake air DB temperature (-F)
Total power consumption (kW) Total capacity (o 103Btu/h)
Cooling capacity
SHF at rating condition = 0.71
Airflow = 392CFM
Bypass Factor = 0.19
Indoor intake air WB temperature (-F)
Indoor intake air WB temperature (-F)
63
67
71
63
67
71
2.PERFORMANCE CURVE(ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)
NOTE : Apoint on the curve shows the reference point.
MS09NW
MUM30NN MS15NN
MUM30NN
OB204-1.qxp 25/9/97 6:34 PM Page 5

6
Data is based on the condition of indoor humidity 50%. Air flow should be set at HI. A point on the corve shows the reference
point.
MS09NW MS15NN
MUM30NN MUM30NN
MS09NW MS15NN
MUM30NN MUM30NN
67
40
50
60
70
80
90
100
(PSIG)
70
Outdoor ambient temperature
75 80 85 90 95 100 104-F
Suction pressure
70
86-F
80
75
Indoor DB temperature
67
170
180
200
220
240
260
280
300
(PSIG)
70 Outdoor ambient temperature 75 80 85 90 95 100 104-F
70
75
80
86-F
Condensing pressure
Indoor DB temperature
3.CONDENSING PRESSURE AND SUCTION PRESURE
(ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)
67
170
180
200
220
240
260
280
300
(PSIG)
70 Outdoor ambient temperature 75 80 85 90 95 100 104-F
70
75
80
86-F
Condensing pressure
Indoor DB temperature
67
40
50
60
70
80
90
100
(PSIG)
70
Outdoor ambient temperature
75 80 85 90 95 100 104-F
Suction pressure
70
86-F
80
75
Indoor DB temperature
OB204-1.qxp 25/9/97 6:34 PM Page 6

7
2.STANDARD OPERATION DATA
MODEL Triple
A+B+CDouble A+B A+C or B+CSingle
115,60,1 115,60,1 115,60,1
0.7+0.8 0.65+0.75 0.6+0.7
95 95 95
— — —
850/940 750/840 0/1030
2,720 2,360 1,039
A or B C
28,400 16,400 20,600 8,200 12,400
0.72 0.72 0.71 0.72
2.99 1.86 2.06 0.99 1.22
2.873 1.79 1.978 0.955 1.173
MSM30NN
CoolingUnit
BTU/h
—
kW
kW
A
kW
A
A
PSIG
PSIG
˚F
˚F
˚F
˚F
ft
—
˚F
˚F
˚F
˚F
DB
WB
DB
WB
R.P.M.
CFM
˚F
˚F
DB
WB
R.P.M.
CFM
Item
Capacity
SHFTotal
Electrical
circuit
Refrigerant
circuit
Indoor
side
Outdoor
side
Input
Indoor unit model
Power supply (V,Hz,{)
Input
Fan current
Outdoor unit model
Power supply (V,Hz,{)
Input
Comp. current
Fan current
Condensing pressure
Suction pressure
Discharge temp.
Condensing temp.
Suction temp.
Comp.shell botton temp.
Ref.pipe length
Refrigerant charge
Entering
air temp.
Discharge
air temp.
Entering
air temp.
Fan speed
Airflow (Hi)
Fan speed
Airflow
MS09NW MS09NW MS15NN MS09NW MS09NW MS09NW MS15NN MS09NW MS15NN
0.035
0.34 0.035 0.34 0.047
0.71
0.41 0.035 0.34 0.035 0.34
MUM30NN
208/230,60,1(3-wire)
0.035
0.34 0.047 0.41 0.035 0.34 0.047 0.41
7.0
273
80
154
122
47
130
25
3 lbs 3 oz
80
67
60
57
1,230
279
264
80
157
118
47
130
25
3 lbs 3 oz
80
67
60
57
1,230
279
243
82
169
111
54
145
25
3 lbs 8 oz
80
67
58
57
1,200
392
262
78
197
118
60
171
25
3 lbs 3 oz
80
67
60
57
1,230
279
263
79
171
116
47
146
25
3 lbs 3 oz
80
67
60
57
1,230
279
269
78
151
118
47
124
25
3 lbs 3 oz
80
67
60
57
1,230
279
240
82
169
110
54
144
25
3 lbs 8 oz
80
67
58
57
1,200
392
267
80
143
121
52
129
25
3 lbs 3 oz
80
67
60
57
1,230
279
267
85
141
118
51
139
25
3 lbs 8 oz
80
67
58
57
1,200
392
7.0 3.8 7.0 7.0 7.0 3.8 7.0 3.8
0.72 0.71
INDOOR UNIT C
INDOOR UNIT B
INDOOR UNIT A
OUTDOOR UNIT
208/230V,60Hz,
1{ 3wire
POWER SUPPLY
115V common
115V 230V
SIGNAL WIRE 2wire 12V DC
115V,60Hz,1{
115V,60Hz,1{
115V,60Hz,1{
OB204-1.qxp 25/9/97 6:34 PM Page 7

8
4.OPERATING RANGE
(1)POWER SUPPLY
(2)OPERATION
5.ADDITIONAL REFRIGERANT CHARGE (R-22(oz))
Indoor unit 115V 60Hz 1[
208/230V 60Hz 1[
(3wires) Min. 198V 208V 230V Max. 253V
Min. 103v—Max. 127V
Outdoor unit
MS09NW
MS15NN
MUM 30NN
Models Rating Guaranteed Voltage
Function
Cooling
Indoor Outdoor
78% –
DB (˚F)
80
95
67
Standard temperature
Maximum temperature
Minimum temperature
Maximum humidity
WB (˚F)
67
71
57
DB (˚F)
95
115
67
WB (˚F)
–
–
–
Intake air
temperature
Condition
Model Outdoor unit precharged
(up to 25ft)
Refrigerant piping length (one way)
MUM MS09NW
MS15NN
3 Ibs 3 oz o2
3 Ibs 8 oz
25ft 30ft 33ft 40ft 45ft 49ft 65ft
0112235
6.MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE
MSM30NN
Indoor unit A
MS09NW
wMax. Height
difference 25ft
Indoor unit B
MS09NW
Outdoor unit
MUM30NN
Indoor unit C
MS15NN
Max. Length
65ft
wMax. Height
difference 25ft
wMax. Height
difference 25ft
Max. Length
65ft
Max. Length
65ft
7.PIPING PREPARATION
Model Additional piping Max. length : ft
A
Length of connecting pipe : in.
MS09NW
MS15NN 65
Gas Liquid Indoor unit
16-15/16
Piping size O.D. : in.
0
[3/8
[5/8 [1/4
Outdoor unit
OB204-1.qxp 25/9/97 6:34 PM Page 8

9
6 OUTLINES AND DIMENSIONS
MODEL : MUM30NN
OUTDOOR UNIT
Air intake
Min.4in.
Min.36in.
Min.33in.
Min.4in.
Min.12in.
Space for servicing wining and piping
3-3/16
2-9/16
Air intake
Drainage hole 2-{1
18-3/4 Installation anchor hole
1-13/16
4-{7/16
7/16
16-9/16
7/16
5-15/16
5-15/16
2
25-5/8
Air outlet
15-3/8
Earth terminal
Service panel
Electrical box
2-1/16
2-5/32
17-3/8
1
45-5/16
Air outlet handle for
moving
12-1/4
20-1/2
12-5/8
{1
{1
13-5/8
37-7/16
Drainage hole
1
Air intake
4 wiring holes {7/8
Refrigerant pipe (Flared) {1/2
Refrigerant pipe (Flared) {1/4
Refrigerant pipe (Flared) {3/8
2-3/8
2-3/8
2-3/8
2-3/8
2-3/8
2-15/16
NOTE : The symbol {indicates the diameter.
Unit : inch
OB204-1.qxp 25/9/97 6:34 PM Page 9

10
7WIRING DIAGRAM
OUTDOOR
MODEL MUM30NN WIRING DIAGRAM
115V115V
RED
POWER
SUPPLY
208/230V
1phase
3wires
60Hz
GROUND
BLU
L2
BLK
NBLK
RED
L1
TB1 RED
BLU
NO52C2
COM WHT 251C2
1
1
51C1
2
WHT
COM
52C1
NO
52C3
NO COM WHT 21
51C3
BLK
MC1 R
C
RED
C1
WHT BLK
R
MC3
S
RED
C3
C
WHT
BLK
BLK
WHT
BLK MC2 R
C
S
C2 RED
BLK
ORN
BRN
ORN
BRN
ORN
BRN
BRN
ORN
BRN
ORN
TO INDOOR UNIT(15C)
CONNECTING WIRES
DC12V
TO INDOOR UNIT(09B)
CONNECTING WIRES
DC12V
TB2
2
1
INDOOR
UNIT
(09A)
(09B)
INDOOR
UNIT
TB3
TO INDOOR UNIT(09A)
CONNECTING WIRES
DC12V 1
2
(15C)
INDOOR
UNIT
ORN
TB4
1
2BRN 52C3
2
52C2
1
2
52C1
1
WHT
BLK
YLW
ORN
RED
1
6
5
4
3
2
ORN
RED
BLU
YLW
BLK
WHT
C62
C61
(52C3) (52C2) (52C1)
CN623 CN622 CN621
LD605
LD606
LD615
LD616
2121 1 2
MF1
X63
X61
X62
4
3
2
1
LD621
LD620
RED
BLU
GRN
F
(AC)
TAB62 T
(2A)
(TRS)
CN64
TAB61
DSAR61
LD61
NR61
LD614
LD613 LD603 LD612 LD602 LD611 LD601
BLU
BLU
BLK
BLK
X63 X62 X61
RED
RED
BLU
BLU
GRY
BLU
GRY
BLU
1
3
CR
7 8
1
2
X64
GRY
BLU
WHT
BLK
YLW
ORN
RED
1
6
5
4
3
2
RED
YLW
BLK
WHT
ORN
6
5
4
3
2
1
GRY
BRN
X64
51
3
4
62
MF2
ORN
RED
BLU
YLW
BLK
WHT X64
S
w
w
w
w
w
w
1.Slide the sleeve.
2.Pull the wire while
pushing the locking
lever.
NOTE:1. Use copper conductors only (For field wiring).
2. Symbols below indicate.
: Terminal block, : Connector
3. “w”shows the terminals with a lock mechanism, so they cannot be removed when you pull
the lead wire.
Be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger.
SYMBOL NAME SYMBOL NAME SYMBOL NAME
C1~C3
COMPRESSOR CAPACITOR MC1~MC3 COMPRESSOR(INNER THERMOSTAT) TB1~TB4 TERMINAL BLOCK
C61,C62 FAN MOTOR CAPACITOR MF1,2
FAN MOTOR(INNER THERMOSTAT) X61~X63 FAN MOTOR RELAY
DSAR61 SURGE ABSORBER NR61 VARISTOR 51C1,2
OVERCURRENT RELAY
F FUSE (2A) T TRANSFORMER 52C1,2 COMPRESSOR CONTACTOR
OB204-1.qxp 25/9/97 6:34 PM Page 10

11
8REFRIGERANT SYSTEM DIAGRAM
MS09NW✕2 MS15NN✕1/MUM30NN Unit : inch
Refrigerant pipe [1/4
(Option)
(with heat insulator)
Indoor coil
thermistor
RT12
Room temp
thermistor
RT11
Flared
connection
Flared
connection
Ball valve
with service port
Refrigerant pipe [3/8
(Option)
(with heat insulator)
Ball valve Service
port
Service
port
Accumulator Muffler
Fusible
plug Compressor
Capillary tube Strainer
MS09NW
Evaporator
Indoor coil
thermistor
RT12
Room temp
thermistor
RT11
Flared
connection
Flared
connection
Refrigerant pipe [1/4
(Option)
(with heat insulator)
Ball valve
with service port
Refrigerant pipe [5/8
(Option)
(with heat insulator)
/2
(Option)
(with heat insulator) Ball valve Service
port
Service
port
Accumulator Muffler
Fusible
plug Compressor
[0.12o[0.063o15-3/4
Capillary tube Strainer
MS15NN
Evaporator
Indoor unit Outdoor unit
Indoor coil
thermistor
RT12
Room temp
thermistor
RT11
Flared
connection
Flared
connection
Refrigerant pipe [1/4
(Option)
(with heat insulator)
Ball valve
with service port
Refrigerant pipe [3/8
(Option)
(with heat insulator)
Ball valve Service
port
Service
port
Accumulator Muffler
Fusible
plug Compressor
[0.12o[0.055o33-7/16
Capillary tube Strainer
MS09NW
Evaporator
Condenser
[0.12o[0.055o33-7/16
OB204-1.qxp 25/9/97 6:34 PM Page 11

12
9 TROUBLESHOOTING
MUM30NN
9-1 Cautions on troubleshooting
9-1-1 Before troubleshooting, check the followings:
1) Check the power supply voltage.
2) Check the indoor/outdoor connecting wire for mis-wiring.
9-1-2 Take care the followings during servicing.
1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then after
confirming the horizontal vane is closed, disconnect the breaker.
2) When removing the P.C. board, hold the edge of the board with care NOT to apply stress on the components.
3) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
Measure the resistance between the terminals with a tester.
(Coil wiring temperature-10¡C ~ 40¡C)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature-10¡C ~ 40¡C)
Part name
Compressor
Outdoor fan
motor
Check method and criterion Figure
Normal(KH22WEV)
0.8~1.1'Opened or
short-circuited
C-R
C-S 4.8~5.2'
Abnormal
Normal(Upper)
60~75'Opened or
short-circuited
WHT-BLK
BLK-YLW
YLW-BLU 15~20' 12~16'
Abnormal

Normal(Lower)
56~61'
14~19'
12~16'
Normal(RH167NAB)
2.1~2.7'
4.0~5.0'
BLU-RED 51~64'54~67'
BLK
RED
YLW
ORN
WHT
P
BLU
9-2 Trouble criterion of main parts
OB204-1.qxp 25/9/97 6:34 PM Page 12

13
MUM30NN
SYSTEM 52C CONTACTOR OUTDOOR FAN RELAY
Triple All three : ON Hi speed / Hi speed
Double Two of them : ON Me speed / Me speed
Single One of them : ON Stop / Hi speed
OPERATION OF 52C1, 52C2, 52C3, X61, X62, X63, x64
NOTE
1 : Compressor is on while 52C is on.
2 : Compressor is off while 52C is off.
3: Relay of X61~X63 can not turn on at the same time.
4: Relay “X64” is turned on only in a single operation.
52C1 52C2 52C3 X61 X62 X63 X64
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF OFF OFF OFF OFF OFF
OFF ON OFF OFF ON ON
ON OFF OFF OFF ON ON
ON ON OFF ON OFF OFF
OFF OFF OFF OFF ON ON
OFF ON OFF ON OFF OFF
ON OFF OFF ON OFF OFF
ON ON ON OFF OFF OFF
FAN RELAY / FAN SPEED / APPLIED VOLTAGE
FAN MOTOR RELAY OUTDOOR FAN SPEED APPLIED VOLTAGE TO FAN
X61 is ON Hi 230V AC between WHT and BLK
X62 is ON Me 230V AC between WHT and YLW
X63 is ON Lo 230V AC between WHT and BLK(Only MF2)
OB204-1.qxp 25/9/97 6:34 PM Page 13

14
10 DISASSEMBLY INSTRUCTIONS
OUTDOOR UNIT MUM30NN
1. Removing of the cabinet
(1)Remove the set screws of the valve cover to remove
the valve cover as shown in Photo 2.
(2)Remove the set screws of the side panel to remove
the side panel and cabinet.
2. Removing the propeller
(1)Remove the propeller nut.
(2)Loosen the propeller in the rotating direction.
(3)Pull the propeller forward.
Note:
●To set the propeller, fit the cut on the shaft to the
mark on the propeller.
OPERATING PROCEDURE PHOTOS
Photo 1
Photo 2
Photo 4
Photo 3
Screws
Screws
Screw
Propeller Nut
OB204-1.qxp 25/9/97 6:35 PM Page 14

15
OPERATING PROCEDURE PHOTOS
Photo 5
Photo 6
3. Removing the outdoor fan motor.
(1) Remove the cabinet. (Refer to 1)
(2) Remove the propeller. (Refer to 2)
(3) Disconnect the connector remove the clamp of out-
door fan
motor lead wire.
(4) Remove the screws fixing the outdoor fan motor.
Set screws of the relay panel
Clamp
Connector
OB204-1.qxp 25/9/97 6:35 PM Page 15

16
OPERATING PROCEDURE PHOTOS
Photo 7
4. Removing the compressor
(1)Disconnect the cord connector. (See Phot 5)
(2)Remove the set screws of the relay panel.
(3)Remove the set nuts of the terminal cover.
(4)Pull up the compressor.
(5)Pull out the lead wires from the compressor terminal
to remove overcurrent relay.
(6)Remove set nuts of the compressor base.
(7)Remove the low pressure side welded part and high
pressure side welded part using a burner.
Note:
●Before using a welder, release gas inside the unit and
make sure that the gauge pressure shows 0 kg/f.
●During welding, open the charge plug because
pressure rises due to expansion by heat
Set nuts of the terminal cover
Nuts
OB204-1.qxp 25/9/97 6:35 PM Page 16

17
11 PARTS LIST
OUTDOOR UNIT PARTS
MUM30NN
Refer to MS09NW,MS15NN for indoor unit.
No. Parts No. RemarksParts Name Symbol in
Skeleton
Wiring
Diagram
Q,ty/unit
MUM30NN
1
2
3
4
5
6
R01 539 668
T2W 510 509
R01 539 662
T2W 800 662
T2W E46 297
T2W E46 001
FRONT PANEL See above NOTE.
1
2
1
1
1
1
OUTE NOZZLE
SIDE PANEL (L)
SERVICE PANEL
TOP PANEL
LABEL See above NOTE.
OB204-1.qxp 25/9/97 6:35 PM Page 17

No. Parts No. RemarksParts Name Symbol in
Skeleton
Wiring
Diagram
Q,ty/unit
MUM30NN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T2W 800 630
T2W 800 631
R01 093 115
T2W 800 301
T2W 800 302
T2W 461 642
M21 B90 641
T92 510 272
T92 650 452
M21 463 936
T2W 460 662
T2W 460 661
R01 L11 410
M21 987 936
T2W 800 523
HEAT EXCHANGER (UPPER)
RA4N80-AC
1
1
2
1MF1
MF2
MC1,MC2
MC3
1
3
6
2
1
2
3
2
1
1
1
HEAT EXCHANGER (UPPER)
PROPELLER
OUTDOOR FAN MOTOR (UPPER)
OUTDOOR FAN MOTOR (LOWER)
FUSIBLE PLUG
CAHRGE PLUG
COMPRESSOR
COMPRESSOR
VALVE (GAS) (for 09A, 09B)
VALVE (LIQUID) (for 09A, 09B)
VALVE (GAS) (for 09A, 09B)
VALVE (GAS)
CAPILLARY TUBE (for 15C)
REAR PANEL
KH-122WEV
RH-167NAB
[0.12o[0.055o25-9/16
(1/4)
(3/8)
(1/2) 15C
[0.12o[0.063o15-3/4
RA4N55-AB
When servicing, cut the tube to the proper length as shownin the REFRIGERANT SYSTEM DIAGRAM see page 11.
18
OB204-1.qxp 25/9/97 6:37 PM Page 18

19
No. Parts No. RemarksParts Name Symbol in
Skeleton
Wiring
Diagram
Q,ty/unit
MUM30NN
1
2
3
4
5
6
7
8
9
10
11
12
T2W 738 353
T2W 500 353
T2W 800 451
T2W 800 382
T2W 800 339
T2W 382 342
T2W 359 340
T2W 800 375
T2W E41 374
T2W E42 375
T2W 464 340
T2W 394 330
MC1. MC2. CAPACITOR 35+ 330V
25+ 370V
2A 250V
2
1
1
1
1
2
1
1
1
1
2
1
MC3. CAPACITOR
OUTDOOR P. C. BOARD
FUSE
TRANSFORMER
MC1. MC2. CONTACTOR
MC3 CONTACTOR
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
MC1. MC2. THERMAL SWTCH
MC3 THERMAL SWITCH
G4F-11123T
VF-12HU
UNIT 15C
UNIT 09A.O9B
MRA98881
MRA98921
C1,C2
C3
F
T
52C1, 52C2
52C3
TB1
TB
TB
51C1, 51C2
51C3
OB204-1.qxp 25/9/97 6:38 PM Page 19

New publication, effective Sep. 1997.
Specifications subject to change without notice.
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
R
CCopyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.
Issued in Sep. 1997 NO.MEE(MELSHI) No.OB204 111
12 OPTIONAL PARTS
10ft
16ft
23ft
33ft
3/8
1/4
C 13/16
D 1-1/16
MAC - 440PI
MAC - 441PI
MAC - 442PI
MAC - 443PI
MS09NW 0
1
Pipe length Cross-section Part No.Model A-Gas B-Liquid
Pipe size O.D Insulation Additional
refrigerant
charge
R-22(Oz)
10ft
16ft
23ft
33ft
49ft
MAC - 670PI
MAC - 671PI
MAC - 672PI
MAC - 673PI
MAC - 674PI
MS15NN C 1-7/32
D 1-1/16
5/8 0
1
3
1. REFRIGERANT PIPES
The air conditioner has flared connections its indoor and outdoor sides.
Please use the optional extension pipe as follows.




,



OB204-1.qxp 25/9/97 6:38 PM Page 20