Mitsubishi Electric Mr.Slim MSH24WN User manual

SERVICE MANUAL
CONTENTS
1. FEATURES·························································3
2. PART NAMES AND FUNCTIONS······················4
3. SPECIFICATION·················································6
4. DATA···································································8
5. OUTLINES AND DIMENSIONS ·······················13
6. WIRING DIAGRAM ··········································15
7. REFRIGERANT SYSTEM DIAGRAM··············16
8. MICROPROCESSOR CONTROL ····················17
9. SERVICE FUNCTIONS ····································29
10. TROUBLESHOOTING······································31
11. DISASSEMBLY INSTRUCTIONS·····················44
12. PARTS LIST······················································48
13. OPTIONAL PARTS ······················BACK COVER
Wireless type
Models
MSH24WN (W) ·MUH24WN
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
CUS
INDOOR UNIT
Indication of model name
MSH24WN
OUTDOOR UNIT
Indication of model name
MUH24WN
Remote
controller
TM
Revision:
●PARTS LIST have been partially modified.
●Please void OB310.
No. OB310
REVISED EDITION-A
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Revision:
• Parts No. has been changed due to the color change of outdoor unit parts. WHITE➔NEW WHITE (Brighter)
• Capillary tubes have been added to parts list.
CAPILLARY TUBE (TAPER PIPE)
[0.17X[0.12X11-13/16
CAPILLARY TUBE (TAPER PIPE)
[0.17X[0.12X1-31/32
E02 785 936
E02 529 936
Part number
Part name
Model
MUH24WN
MUH24WN
Page
51
51
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3
LCD wireless
remote controller
“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 provide even greater con-
trol 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 then 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
MSH24WN
Model 22,000 Btu/h
Cooling capacity
23,600 Btu/h
Heating capacity
10.0
SEER 6.8/5.9
HSPF(44/55)
SWING
FEATURES
1
MSH24WN
MUH24WN
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4
PART NAMES AND FUNCTIONS
2
INDOOR UNIT
MSH24WN
Installation plate
Installation plate fixing screw 4 x 25 mm(0.16 x 0.98 in.)
Remote controller holder
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
7
1
2
2
1
1
1
2
3
4
5
6
7
MSH24WN
ACCESSORIES
Grille
Air inlet
Remote control
receiving section
Horizontal vane
Remote controller
Deodorizing filter (option)
(Gray sponge type)
Air cleaning filter (option)
(White bellows type)
Air filter
Vertical vane
Operation section
(When the grille is opened)
Display section
Operation indicator lamp
Receiving section
Emergency operation switch
Front panel
Operation Indicator
OUTDOOR UNIT
MUH24WN
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5
REMOTE CONTROLLER
MSH24WN
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
STOP
START
HR.
MIN.
WIDE VANE
LONG
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 button
(Horizontal vane button)
CLOCK SET button
LONG button
WIDE VANE button
(Vertical vane 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)
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB
❈3 : (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 82˚FDB, 65˚FWB
Operating Range
Item Model
Capacity
Power
consumption
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
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
A
A
F.L.A
A(kW)
CFM
CFM
pt./h
dB(A)
in.
in.
in.
in.
Ib.
A
A
F.L.A
R.L.A
L.R.A
dB(A)
in.
in.
in.
Ib.
in.
in.
ft.
ft.
lb.
oz.
MSH24WN
22,000
23,600
13,500
2,220
2,230
1,730
9.9 (10.0)
6.8 (5.9)
3.10
MSH24WN
White
115V 60Hz 1[
15
1.1
0.82
–
431-491-565
402(346)-484(417)-565(487)
7.3
39-43-47
5/8
43-5/16
8-15/16
12-13/16
40
MUH24WN
Munsell 5Y 7/1
208/230V 60Hz 1[3 wires
25
22
0.87
PH33NPBT
C-R 0.84 C-S 2.09
16
58
Linear expansion valve
55
Reverse cycle
34-1/4
11-5/8
33-1/2
154
Wireless type
12V DC
Not supplied (optional parts)
3/8 (0.0285)
5/8 (0.0315)
Flared
Flared
Max. 25
Max. 50
4 Ib. 0 oz.
27.9 (MS32N1)
❈1❈3
❈1
❈1
❈2
❈1❈1
❈2
Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating
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
Cooling
Heating
Maximum
Minimum
Maximum
Minimum
Indoor intake air temperature
95˚FDB, 71˚FWB
67˚FDB, 57˚FWB
80˚FDB, 67˚FWB
70˚FDB, 60˚FWB
Outdoor intake air temperature
115˚FDB
67˚FDB
75˚FDB, 65˚FWB
17˚FDB, 15˚FWB
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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
MSH24WN MUH24WN
Additional piping
Max. length : ft.
A
50
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
[ 5/8 [ 3/8
0.0315 0.0285
MAX. REFRIGERANT PIPING LENGTH
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8
DATA
4
Model Refrigerant piping length (one way)
1.0
25ft. (std.)
0.954
40ft.
0.923
50ft.
MSH24WN
2) COOLING CAPACITY CORRECTIONS
3) HEATING CAPACITY
(208V/ 230V)
Model
Indoor air Outdoor intake air WB temperature(˚F)
75
70
65
TC
13.7
14.5
14.9
TPC
1.66
1.61
1.54
TC
17.1
17.7
18.5
TPC
1.95
1.91
1.84
TC
20.4
20.9
21.6
TPC
2.17
2.12
2.06
TC
23.0
23.6
24.3
TPC
2.29
2.23
2.17
TC
23.7
24.3
25.0
TPC
2.32
2.27
2.21
TC
26.9
27.5
28.1
TPC
2.41
2.36
2.32
IDB
(˚F)15 25 35 43 45 55
MSH24WN
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.
4-1. PERFORMANCE DATA
1) COOLING CAPACITY
MSH24WN MUH24WN
Model
Indoor air Outdoor intake air DB temperature(˚F)
71
67
63
TC
27.0
25.5
24.0
SHC
13.4
16.1
18.3
TPC
1.98
1.86
1.78
TC
25.2
23.8
22.2
SHC
12.5
15.0
17.0
TPC
2.16
2.05
1.96
TC
23.7
22.0
20.7
SHC
11.7
13.9
15.8
TPC
2.33
2.22
2.12
TC
22.0
20.5
18.8
SHC
10.9
12.9
14.4
TPC
2.45
2.35
2.26
TC
20.2
18.8
17.2
SHC
10.1
11.9
13.1
TPC
2.55
2.46
2.35
IWB
(˚F)75 85 95 105 115
MSH24WN
(208V/ 230V)
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.
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9
4-2. PERFORMANCE CURVE
MSH24WN
MUH24WN
16
18
20
22
24
26
28
30
65 70 75 80 85 90 95 100 105 110 115
1.6
1.8
2.0
2.2
2.4
2.6
15 20 25 30 35 40 45 50 55 60
1.6
1.8
2.0
2.2
2.4
2.6
10
12
14
16
18
20
22
24
26
28
30
71
67
63
71
67
63
65
70
75
75
70
65
Total power consumption (kW) Total capacity ( ✕10 Btu/h)
Outdoor intake air DB temperature (°F)
Indoor intake air WB temperature (°F)
Indoor intake air WB temperature (°F)
Cooling
SHF at rating condition = 0.63
= 487CFM
= 0.19
Airflow
Bypass Factor
Total power consumption (kW) Total capacity ( ✕10 Btu/h)
Outdoor intake air WB temperature (°F)
Indoor intake air DB temperature (°F)
Indoor intake air DB temperature (°F)
Heating
= 565CFM
Airflow
208V/230V
208V/230V
208V/230V
208V/230V
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10
Data is based on the condition of indoor humidity 50%.
Air flow should be set to High speed.
4-3. Condensing pressure
MSH24WN
(Cooling)
Data is based on the condition of outdoor humidity 75%.
Air flow should be set to High speed.
Data is for heating operation without any frost.
MSH24WN
(Heating)
68 70 75 80 85 90 95 100 104(°F)
40
50
60
70
80
90
100
Suction pressure
Outdoor ambient temperature
68 70 75 80 85 90 95 100 104(°F)
140
160
180
200
220
240
260
280
300
(PSIG)
Condensing pressure
Outdoor ambient temperature
Indoor DB temperature (°F)
86
80
75
70
Indoor DB temperature (°F)
(PSIG)
86
80
75
70
5 10152025303540455055606570(°F)
140
160
180
200
220
240
260
280
300
320
340
Indoor DB temperature(°F)
75
70
65
75
70
65
(PSIG)
Condensing pressure
Outdoor ambient temperature
(PSIG)
Suction pressure
Outdoor ambient temperature
5 10152025303540455055606570(°F)
10
20
30
40
50
60
70
80
90
Indoor DB temperature (°F)
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