Mitsubishi Electric Mr.Slim MSZ09UN W User manual

SERVICE MANUAL
CONTENTS
1. FEATURES·························································2
2. PART NAMES AND FUNCTIONS······················4
3. SPECIFICATION·················································6
4. DATA···································································8
5. OUTLINES AND DIMENSIONS ·······················18
6. WIRING DIAGRAM ··········································20
7. REFRIGERANT SYSTEM DIAGRAM··············22
8. MICROPROCESSOR CONTROL ····················23
9. SERVICE FUNCTIONS ····································39
10. TROUBLESHOOTING······································41
11. DISASSEMBLY INSTRUCTIONS·····················61
12. PARTS LIST······················································68
13. OPTIONAL PARTS···········································74
Wireless type
Models
MSZ09UN (W) · MUZ09UN
MSZ12UN (W) · MUZ12UN
No. OB297
REVISED EDITION-A
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
CUS
Remote
controller
TM
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
MSZ09UN
INDOOR UNIT
MUZ09UN
MUZ12UN
OUTDOOR UNIT
Revision A:
●Conditions of operation frequency have been added.
Please void OB297.
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2
1FEATURES
MSZ09UN
MUZ09UN
MUZ12UN
LCD wireless
remote controller
MSZ12UN
High–speed cooling & heating
Ideal and comforting performance is assured by controlling compressor
rotation according to the cooling and heat load of a room. Inverter tech-
nology promotes maximum compressor efficiency by flexibly changing
the rotation speed of it to accurately match operating requirements.
Optimum comfort year-round
To ensure that a room is never too cold or too hot, inverter technology
allows the system to detect subtle fluctuations in room temperature and
adjust automatically. Unlike conventional air conditioning units that must start
or stop the compressor repetitively, inverter units offer finely tuned operation
– such as the accurate control of room temperature – for a more comforting
airflow and far less temperature variations.
Hours
Room Temperature
Single speed comppressor Model
Temperature is adjusted by
turning on/ off the compressor.
Inverter Model
Constant temperature is maintained
by compressor speed control.
10
13
Cool
MSH12EN MSZ12UN
6.8
7.7
Heat
MSH12EN MSZ12UN
Extra energy – savings
Inverter technology makes the value of SEER and HSPF better compared to non-inverter model’s value.
Model Cooling capacity Heating capacity SEER HSPF(44/55)
MSZ09UN 8,800 Btu/h 12,300 Btu/h 12.0 7.7/6.7
MSZ12UN 11,400 Btu/h 16,000 Btu/h 13.0 7.7/6.7
High / Low
MSH09EW MSH12EN
Model
Fan speed
Sound level
MSZ09UN MSZ12UN
43 / 32 36 / 22 42 / 35
48 / 38
(dBA)
The sound level of indoor unit has been lowered.
Revision A:
• Conditions of operation frequency have been added.
• SPECIFICATION, DATA, WIRING DIAGRAM and PARTS LIST have been partially modified.
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3
“I FEEL CONTROL” IN OUR LCD WIRELESS REMOTE CONTROLLER WITH ON/OFF PROGRAM TIMER
Mitsubishi Electric’s new wireless remote controller incorporates a number of advanced features that provides even greater
control and ease-to-use. It has a liquid crystal display which indicates such information as mode, fan speed and temperature
selected as well as the programmed ON/OFF timer. It is also equipped with “I Feel Control”, a unique Mitsubishi Electric fea-
ture that allows the user to adjust the temperature to exactly the level he or she wants simply by tapping the button that
describes present conditions : “Too Cool” or “Too Warm”. The optimum temperature set this way is that memorized for immedi-
ate recall whenever the air conditioner is used again.
Select desired air flow direction.
REMOTE-CONTROL OPERATION MODE
Using the remote controller, you can select from five airflow set-
tings to match room layout and the location of people. Also, you
can set the vane to swing automatically.
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 energy
efficient rotary compressor results in lower operating costs and
longer service life.
SWING
Single rotary:
Centrifugal force always
produced in one direction,
resulting in excessive vibration.
Twin rotary:
Centrifugal force of one
roller counterbalanced
by that of the other roller
for significantly lower vibration.
MSH09EW MSH12EN
Model
Size
MSZ09UN MSZ12UN
14-13/16 10-15/16 12-5/8
14-3/16
(in.)
The height of indoor unit has been shortened.
Outdoor unit: Twin rotary compressor greatly reduces noise
Unlike conventional models equipped with a single rotary, the features a twin-rotary compressor that provides balanced rota-
tion – the centrifugal force of one roller is counterbalanced by the other – for significantly reduced vibration and noise. It’s
exactly this kind of technology that makes Mitsubishi Electric’s outdoor units so quiet.
MUH12EN
Sound level (Cooling/Heating)
MUZ12UN
49 / 49
54 / 54
dB(A)
The sound level of outdoor unit has been lowered.
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4
PART NAMES AND FUNCTIONS
2
INDOOR UNIT
MSZ09UN
Operation section
Emergency operation switch
Horizontal vane
Air filter
Deodorizing filter(option)
(gray sponge type)
Vertical vanes
Air inlet
Grille
Remote control
receiving section
Remote controller
Air cleaning filter(option)
(white bellows type)
Front panel
Emergency operation switch Operation indicator lamp
Receiving section
Operation indicator lamp
Receiving section
(When the grille is opened)
MSZ09UN MSZ09UN
Air inlet (back and side)
Piping
Drainage hose
Service panel
Air outlet
Drain outlet
OUTDOOR UNIT
MUZ09UN
MUZ12UN
MSZ12UN MSZ12UN
MSZ12UN
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5
Installation plate
Installation plate fixing screw 4 x 25 mm(0.16 x 0.98 in.)
Remote controller mounting hardware
Fixing screw for 33.5 x 16 mm(0.14 x 0.63 in.) (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
1
5
1
2
2
1
1
1
2
3
4
5
6
7
MSZ09UN
1
6
1
2
2
1
1
MSZ12UN
ACCESSORIES
REMOTE CONTROLLER
MSZ09UN
MSZ12UN
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
STOP
START
HR.
MIN.
I FEEL COOL
HEAT
DRY
PM
CLOCK
AM
RESET CLOCK
Open the front lid.
Signal transmitting section
Operation display section
OPERATE /STOP
(ON /OFF)button
TEMPERATURE buttons
OPERATION SELECT button
FAN SPEED CONTROL button
OFF-TIMER button
HR. button
MIN. button
(TIME SET button)
ON-TIMER button
RESET button
VANE CONTROL button
CLOCK SET button
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6
SPECIFICATION
3
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: Hz
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: Hz
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: Hz
Item Model MSZ12UN
Capacity
Rated(Minimum~Maximum)
Capacity Rated
Power consumption
Rated(Minimum~Maximum)
Power consumption Rated
EER [SEER]
HSPF IV(V)
COP
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)/ Disconnect switch
Min. circuit ampacity
Fan motor
Auxiliary heater
Airflow Low—Med.—High
Moisture removal
Sound level Low-Med.-High
Cond. drain connection O.D.
Dimensions
Weight
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 (R22)
Refrigerating oil (Model)
Btu/h
Btu/h
Btu/h
W
W
W
V, phase, Hz
A
A
F.L.A
A(kW)
CFM
CFM
pt./h
dB(A)
in.
in.
in.
in.
Ib.
V, phase, Hz
A
A
F.L.A
R.L.A
L.R.A
dB(A)
in.
in.
in.
Ib.
in.
in.
ft.
ft.
oz.
7.7 (6.7)
White
115, 1, 60
15
–
5/8
7-1/2
Munsell 5.6Y 8.0/0.5
208/230, 1, 60
15
14
0.43
SHV-130FEA
U-V 1.05 U-W 1.05 U-W 1.05
9.7
41
Liner expansion valve
49
Reverse cycle
28
10-1/16
21-1/4
75
Wireless type
12V DC
Not supplied (optional parts)
1/4 (0.0265)
Flared
Flared
Max. 25
Max. 49
10.8 (MS56)
11,400(2,900~13,000)
16,000(2,400~19,500)
11,600
1,140(290~1,460)
1,590(280~2,050)
1,760
10.0[13.0]
2.95
MSZ12UN
0.6
0.43
360-395-452
360(311)-395(339)-452(388)
2.8
35-39-42
39-15/16
12-5/8
31
MUZ12UN
1/2 (0.0285)
2 Ib. 14 oz.
8,800(2,600~9,700)
12,300(2,300~15,700)
10,000
980(290~1,250)
1,320(280~1,770)
1,420
9.0 [12.0]
2.73
MSZ09UN
0.5
0.37
184-237-297
148(124)-215(180)-279(233)
2.3
22-29-36
33-1/2
10-15/16
20
3/8 (0.0285)
2 Ib. 7 oz.
❈1❈3
❈1
❈1
❈2
❈1❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
MSZ09UN
MUZ09UN
HEAT Dry
COOL Dry(Wet)
W
D
H
Model
Winding resistance (at 68˚F) Ω
W
D
H
Liquid
Gas
Indoor
Outdoor
Height difference
Piping length
❈1
❈4
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7
Indoor
unit
w Max. Height
difference 25ft. Outdoor unit
Refrigerant Piping
Max.length
A
w Height difference should be within
25ft. regardless of which unit,
indoor or outdoor position is high.
MAX. HEIGHT DIFFERENCE
Outside
diameter Minimum
Wall
thickness Outside
diameter Minimum
Wall
thickness
MSZ09UN
MSZ12UN
MUZ09UN
MUZ12UN
Additional piping
Max. length : ft.
A
49
GasPiping size : in. Length of connecting pipe : in. Liquid Indoor unit Outdoor unit
Model
Gas :
Liquid :
0
0
Gas :
Liquid :
16-15/16
19-11/16
[ 3/8
[ 1/2 [ 1/4
0.0285 0.0265
MAX. REFRIGERANT PIPING LENGTH
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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8
DATA
4
Model
Indoor air Outdoor intake air DB temperature(˚F)
71
67
63
71
67
63
10.8
10.2
9.6
14.0
13.2
12.4
6.1
7.1
8.0
8.3
9.7
10.7
0.87
0.82
0.78
1.01
0.96
0.91
10.1
9.5
8.9
13.1
12.3
11.5
5.7
6.7
7.4
7.8
9.0
9.9
0.96
0.91
0.87
1.11
1.05
1.01
9.5
8.8
8.3
12.3
11.4
10.7
5.4
6.2
6.9
7.3
8.3
9.3
1.03
0.98
0.94
1.20
1.14
1.09
8.8
8.2
7.5
11.4
10.6
9.7
5.0
5.7
6.3
6.8
7.7
8.4
1.08
1.04
1.00
1.26
1.21
1.16
8.1
7.5
6.9
10.5
9.7
8.9
4.6
5.3
5.7
6.3
7.1
7.7
1.13
1.09
1.04
1.31
1.27
1.21
IWB
(˚F)75 85 95 105 115
MSZ09UN
MSZ12UN
NOTE 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.
TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC
4-1. PERFORMANCE DATA
1) COOLING CAPACITY
MSZ09UN
MSZ12UN MUZ09UN
MUZ12UN
Model Refrigerant piping length (one way : ft.)
1.0
25 (std.)
0.954
40
0.927
49
MSZ09UN
MSZ12UN MUZ09UN
MUZ12UN
2) COOLING CAPACITY CORRECTIONS
3) HEATING CAPACITY
Model
Indoor air Outdoor intake air WB temperature(˚F)
75
70
65
75
70
65
7.1
7.6
7.7
9.3
9.8
10.1
0.98
0.95
0.91
1.18
1.14
1.10
8.9
9.2
9.7
11.6
12.0
12.6
1.16
1.13
1.09
1.39
1.36
1.31
10.6
10.9
11.3
13.8
14.2
14.6
1.29
1.25
1.22
1.55
1.51
1.47
12.0
12.3
12.7
15.6
16.0
16.5
1.35
1.32
1.29
1.63
1.59
1.55
12.4
12.7
13.0
16.1
16.5
17.0
1.37
1.35
1.31
1.65
1.62
1.57
14.0
14.3
14.6
18.2
18.6
19.0
1.43
1.40
1.37
1.72
1.69
1.65
IDB
(˚F)15 25 35 43 45 55
MSZ09UN
MSZ12UN
NOTE: 1. IDB : Intake air dry-bulb temperature
TC : Total Capacity (x103 Btu/h)
TPC : Total Power Consumption (kW)
2. Above data is for heating operation without any frost.
TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC
How to operate with fixed operational frequency of the compressor.
1. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL mode
or EMERGENCY HEAT mode before starting to operate the air conditioner.
2. The compressor starts up.
The operational frequency of the compressor is MSZ09UN: 64Hz, MSZ12UN: 70Hz in EMERGENCY COOL mode and
58Hz in EMERGENCY HEAT mode.
3. The fan speed of the indoor unit is High.
4. This operation continues for 30minutes.
5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the
remote controller.
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9
4-2. PERFORMANCE CURVE
71
67
63
71
67
63
65
70
75
75
70
65
Total power consumption (kW) Total capacity ( ✕103Btu/h)
Outdoor intake air DB temperature (°F)
SHF at rating condition = 0.70
= 233CFM
= 0.23
Airflow
Bypass Factor
12
10
8
6
1.2
65 75 85 95 105 115
0.8
0.6
Total power consumption (kW) Total capacity ( ✕103Btu/h)
Outdoor intake air WB temperature (°F)
= 297CFM
Airflow
13
15
11
9
7
1.6
1.4
15 25 35 45 55
1.0
0.6
0.8
1.2
1.0
Indoor intake air WB temperature (°F)
Indoor intake air DB temperature (°F)
Indoor intake air DB temperature (°F)
Indoor intake air WB temperature (°F)
0.4
MSZ09UN MUZ09UN
(Heating)
MSZ09UN MUZ09UN
(Cooling)
This value of frequency is not the same as the actual frequency in operating. Refer to the page 16, 17 for the relationships
between frequency and capacity.
How to operate with fixed operational frequency of the compressor.
1. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL mode
or EMERGENCY HEAT mode before starting to operate the air conditioner.
2. The compressor starts up.
The operational frequency of the compressor is 64Hz in EMERGENCY COOL mode and 58Hz in EMERGENCY HEAT
mode.
3. The fan speed of the indoor unit is High.
4. This operation continues for 30minutes.
5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the
remote controller.
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10
MSZ12UN MUZ12UN
(Cooling)
71
67
63
71
67
63
14
12
8
10
1.5
1.3
1.1
0.9
0.7
0.5
Indoor intake air WB temperature (°F)
Indoor intake air WB temperature (°F)
65
70
75
75
70
65
21
17
9
13
2.0
1.0
SHF at rating condition = 0.73
= 388CFM
= 0.19
Airflow
Bypass Factor
65 75 85 95 105 115
Total power consumption (kW) Total capacity ( ✕10 Btu/h)
Outdoor intake air DB temperature (°F)
Indoor intake air DB temperature (°F)
= 452CFM
Airflow
15 25 35 45 55
Total power consumption (kW) Total capacity ( ✕10 Btu/h)
Outdoor intake air WB temperature (°F)
1.2
1.4
1.6
1.8
Indoor intake air DB temperature (°F)
MSZ12UN MUZ12UN
(Heating)
This value of frequency is not the same as the actual frequency in operating. Refer to the page 16, 17 for the relationships
between frequency and capacity.
How to operate with fixed operational frequency of the compressor.
1. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL mode
or EMERGENCY HEAT mode before starting to operate the air conditioner.
2. The compressor starts up.
The operational frequency of the compressor is 70Hz in EMERGENCY COOL mode and 58Hz in EMERGENCY HEAT
mode.
3. The fan speed of the indoor unit is High.
4. This operation continues for 30minutes.
5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the
remote controller.
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