SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
L
I
S
T
E
D
CUS
Revision:
●PARTS LIST have been partially modified.
●Please void OB310.
SERVICE MANUAL
Wireless type
Models
MSH24WN (W) · MUH24WN
No. OB310
REVISED EDITION-A
INDOOR UNIT
Indication of model name
MSH24WN
Remote
controller
OUTDOOR UNIT
Indication of model name
MUH24WN
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
The Slim Line.
From Mitsubishi Electric.
TM
Revision:
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
• 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.
LCD wireless
remote controller
SWING
SWING
1
FEATURES
MSH24WN
MUH24WN
Model
MSH24WN
Cooling capacity
22,000 Btu/h
Heating capacity
23,600 Btu/h
SEER
10.0
HSPF(
6.8/5.9
)
44/55
“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 feature 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 immediate 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 settings 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.
3
2
Installation plate
Installation plate fixing screw 4 x 25 mm(0.16 x 0.98 in.)
Remote controller holder
Fixing screw for 3 3.5 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
PART NAMES AND FUNCTIONS
INDOOR UNIT
MSH24WN
Deodorizing filter (option)
(Gray sponge type)
Air cleaning filter (option)
(White bellows type)
Front panel
Air filter
Vertical vane
Operation section
(When the grille is opened)
Grille
Air inlet
Remote control
receiving section
Horizontal vane
Remote controller
Display section
Operation indicator lamp
Operation Indicator
Emergency operation switch
Receiving section
ACCESSORIES
OUTDOOR UNIT
MUH24WN
4
REMOTE CONTROLLER
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)
MSH24WN
5
3
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
SPECIFICATION
NOTE : Test conditions are based on ARI 210/240.
❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚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
(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB
6
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.
Outside
diameter
Minimum
Wall
thickness
Outside
diameter
Minimum
Wall
thickness
MSH24WN MUH24WN
Additional piping
Max. length : ft.
A
50
Gas
Piping size : in. Length of connecting pipe : in.
Liquid
Indoor unit
Outdoor unit
Model
Gas :
Liquid :00
Gas :
Liquid :
16-15/16
19-11/16
[ 5/8
[ 3/8
0.0315 0.0285
MAX. REFRIGERANT PIPING LENGTH
MAX. HEIGHT DIFFERENCE
7
4
Model
Refrigerant piping length (one way)
1.0
25ft. (std.)
0.954
40ft.
0.923
50ft.
MSH24WN
(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 (x10
3
Btu/h)
TPC : Total Power Consumption (kW)
2. Above data is for heating operation without any frost.
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 (x10
3
Btu/h), SHC : Sensible Heat Capacity (x10
3
Btu/h)
TPC : Total Power Consumption (kW)
2. SHC is based on 80˚F of indoor intake air DB temperature.
DATA
MSH24WN MUH24WN
4-1. PERFORMANCE DATA
1) COOLING CAPACITY
2) COOLING CAPACITY CORRECTIONS
3) HEATING CAPACITY
8
4-2. PERFORMANCE CURVE
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
MSH24WN
MUH24WN
9
4-3. Condensing pressure
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 101520253035404550556065 70(°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 101520253035404550556065 70(°F)
10
20
30
40
50
60
70
80
90
Indoor DB temperature (
°F)
MSH24WN
(Cooling)
Data is based on the condition of indoor humidity 50%.
Air flow should be set to High speed.
MSH24WN
(Heating)
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.
10
4-4. STANDARD OPERATION DATA
MSH24WN
INDOOR UNIT
OUTDOOR UNIT
115V 60Hz 1[, 2 wires
208/230V 60Hz 1[,
2 wires
SIGNAL
WIRE
2 wires
12V DC
INDOOR UNIT
OUTDOOR UNIT
208/230V
60Hz 1[,
3 wires
115V 60Hz 1[,
2wires
SIGNAL WIRE
2 wires 12V DC
•Both wirings can be applied.
115V
Disconnect switch
Model
Item
Capacity
Total
Electrical
circuit
Refrigerant
circuit
Indoor
unit
SHF
Input
Indoor unit
Power supply
Input
Fan motor current
Aux. heater current
Outdoor unit
Power supply
Input
Comp. current
Fan motor current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp
Ref. pipe length
Refrigerant charge (R22)
Intake air temperature
Discharge air temperature
Fan speed (High)
Airflow (High)
Intake air temperature
Outdoor
unit
Fan speed
Airflow
POWER SUPPLY
DB
WB
DB
WB
DB
WB
Unit
Btu / h
—
kW
kW
A
A
kW
A
A
PSIG
PSIG
˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
˚F
˚F
rpm
CFM
˚F
˚F
rpm
CFM
Cooling
22,000
0.63
2.22
2.149
9.60 / 8.52
257
73
180
116
52
163
80
67
53
51
1,280
487(Wet)
95
–
MSH24WN
Heating
23,600
–
2.23
MSH24WN
115V 60Hz 1[
0.071
0.62
–
MUH24WN
208/230V 60Hz 1[
2.159
9.65 / 8.56
0.67/0.71
250
56
185
115
35
167
25
4 lb. 0 oz.
70
60
109
–
1,280
565(Dry)
47
43
750/820
1,589/1,765
✻ Control voltage
11
Power supply voltage to
serial signal circuit is 12V
DC.
Voltage between
33
+ on in-out terminal
11
- and
block will be 12V DC
peak voltage.
4-5. OPERATING RANGE
Indoor unit
Outdoor unit
Rating
115V 60Hz 1[
208/230V 60Hz 1[
Guaranteed Voltage
MSH24WN
MUH24WN
Model
Min. 103V
Max. 127V
115V
Min. 198V Max. 253V
208V
230V
78%
—
Function
Cooling
Heating
Standard temperature
Maximum temperature
Minimum temperature
Maximum humidity
Standard temperature
Maximum temperature
Minimum temperature
DB (˚F)
80
95
67
70
80
70
WB (˚F)
67
71
57
60
67
60
Indoor
DB (˚F)
95
115
67
47
75
17
WB (˚F)
—
—
—
43
65
15
Outdoor
Condition
Intake air
temperature
Model
MSH24WN
Mode
HEAT
COOL
565
565
487
Air flow
(CFM)
Air speed
(ft./sec.)
Coverage
range (ft.)
Function
Dry
Dry
Wet
20.1
20.1
17.2
34.2
34.2
29.4
MSH24WN MUH24WN
Outdoor unit
precharged
(up to 25ft.)
4 lb. 0 oz.
25ft.
0
30ft.
1.61
35ft.
3.22
Refrigerant piping length (one way)
40ft.
4.83
45ft.
6.44
50ft.
8.05
Model
CALCULATION : Xoz. = 1.61/ 5oz./ft. x (Additional Piping Length-25) ft.
(1) POWER SUPPLY
(2) OPERATION
4-6. OUTLET AIR SPEED AND COVERAGE RANGE
● The air coverage range is the figure up to the position where the air speed is 1 ft./sec., when air is blown out
horizontally from the unit properly at the High speed position.
The coverage range should be used only as a general guideline since it varies according to the size of the room and furniture
arranged inside the room.
4-7. ADDITIONAL REFRIGERANT CHARGE (R22(oz.))
12
5
6-3/8
3/4
2-5/16
1-7/8
5/16
12-3/8
10-1/161-7/8
1/8
3-7/8
3-7/8
6-13/16
6-13/16
16-5/16 16-5/16
3/168-7/8
8-15/16
9-15/16
31-1/8
2-3/16
42-1/16
43-5/16
12-13/16
Air out
Air in
Insulation [ 1-1/8
Drain hose [5/8
(Connected part O.D)
{
Liquid line [ 3/8 19-11/16
Gas line [ 3/4 16-15/16
Insulation [ 1-15/16 O.D
[ 1-1/4 I.D
Installation plate
Wall hole [ 2-15/16
Wireless remote controller
Installation plate
Indoor unit
OUTLINES AND DIMENSIONS
MSH24WN
INDOOR UNIT
Unit: inch
13
MUH24WN
Unit: inch
OUTDOOR UNIT
7-9/32
Air intake
Outlet guide
installation hole
Handle for moving
A
17-3/8
7-1/18 20-5/8
1-9/16
Drain hole [1-5/16
19-11/16
Air outlet
34-1/4
11-7/8
20-5/8
2-1/2o7/8 Oval holes
(standard bolt M10)
Air intake
7-9/32
18-7/18
4-1/8
Outdoor Unit-Necessary surrounding clearance
11/16
13
14-1/4
1-9/16 1-1/16
9/16
Terminal block for power line
Terminal block for indoor and outdoor unit connection
Handle for moving
Service panel
Refrigerant-pipe flared
33-1/2
connection [5/8
21-3/4
Refrigerant-pipe flared
17-17/32
2-3/8
1-5/16
Bottom
piping hole
1-5/8
connection [3/8
17-23/32
Knock out hole
for front piping
(refrigerant,drainage
and wiring)
Knock out hole
1-3/4
for right piping
(refrigerant,drainage
and wiring)
2-3/8
4-3/4
13/32
Front opening
13/32
19-11/16
1-3/4
2-1/16
Knock out holes for
power line 2-[1-1/16
7-7/8
Note:Allow adequate
upper clearance
13/32
5-29/32
19-11/16
Service space
Drain hole [1-5/16
Handle
for moving
5-7/16
Rear piping hole
3-3/4
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation)
13/32
4
For 10 units or less
The upper side must be open.
7-7/8
39-3/8
2-U-shaped
notched
holes
Side air intake
Rear fresh
air intake
9/32
A
11-5/8
15/16
Conduit hole
NOTE: Do not wire12V DC and
115V AC in same conduit hole.
15/16
1/2
R1/4
1-5/16
R13/16
2-9/16
11/16
Front right piping holesdetail figures
R13/16
1 max.
3-1/8
Standard bolt length
14
6
WIRING DIAGRAM
MSH24WN
INDOOR UNIT
TO OUTDOOR
UNIT
CONNECTING
WIRES
12V DC
FROM OUTDOOR
UNIT
CONNECTING
WIRES
POWER
(
)
SUPPLY
115V
1 phase
60Hz
TO OUTDOOR
UNIT
CONNECTING
WIRE
MODEL WIRING DIAGRAM
15
CN201
1
2
3
4
TAB12
CN
102
3
DISPLAY
P.C.BOARD
TB
3+
ORN
1-
VLT
w
N
BLK
L1
RED
CN
151
MV2 MV2 MV1
HIC1
TRANS
F11
CN
101
ELECTRONIC CONTROL P.C. BOARD
3
RECEIVER
P.C.BOARD
w A disconnect may be required by local code.
SYMBOL
C11
F11
HIC1
MF
NOTE:1. About the outdoor side electric wiring, refer to the outdoor unit electric wiring diagram for servicing.
INDOOR FAN CAPACITOR
FUSE(3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR (INNER PROTECTOR)
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate;
: Terminal block, : Connector
MUH24WN
OUTDOOR UNIT
NAME
SYMBOL
MV1
MV2
NR11
RT11
VANE MOTOR(HORIZONTAL)
VANE MOTOR(VERTICAL)
VARISTOR
ROOM TEMPERATURE THERMIST OR
MODEL WIRING DIAGRAM
FROM INDOOR UNIT
CONNECTING WIRE
FROM INDOOR UNIT
CONNECTING WIRES
12V DC
TO INDOOR UNIT
CONNECTING
WIRES
115V
1 phase 60Hz
POWER
SUPPLY
208/230V
1 phase 60Hz
GROUND
TB2
TB1
+
3
-
1
N
L1
RED
L1
N
L2
GRN/YLW
BLK
RED
NAME NAME
RT61
RT62 RT63
CN661
RED
BLU
BLU
DSAR
CN662
X52X62
T61
LEV
6
CN724
SR61
DEICER P.C.BOARD
A2 A1
52C
NR11
C11
SR141
REMOTE
CONTROLLER
SYMBOL
RT12
RT13
SR141
MF
WHT
BLK
3456
BLK
WHT
123
NR61
1
52C
4
3
2
1
CN112
CN
121
1
3
4
CN211
CN
111
3
BLK
GRY
YLW
BRN
WHT
RED
RT13
RT12
MF
RT11
INDOOR COIL THERMISTOR(MAIN)
INDOOR COIL THERMISTOR(SUB)
SOLID STATE RELAY
TERMINAL BLOCK
TB
ORN
RED
21
RED
ORN
C2
CN711
C1
X62
COM
X52
COM
F61
CN730
2
ORN
VLT
BLU
RED
CN721
NO
TAB52
NO
WHT
RED
BLK
BLK
1
2
3
1
3
5
7
21S4
BLK
BLU
C
S
R
MC
SG79J618H02
SYMBOL
C1
C2
DSAR
F61
LEV
MC
MF
NOTE:1. About the indoor side electric wiring, refer to the indoor unit electric wiring diagram for servicing.
COMPRESSOR CAPACITOR
OUTDOOR FAN CAPACITOR
SURGE ABSORBER
FUSE(3.15A)
EXPANSION VALVE COIL
COMPRESSOR(INNER PROTECTOR)
OUTDOOR FAN MOTOR(INNER PROTECTOR)
2. Use copper conductors only.(For field wiring)
3. Symbols below indicate;
: Terminal block, : Connector
NAME
SYMBOL
NR61
RT61
RT62
RT63
SR61
TB1
TB2
NAME NAME
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMIST OR
AMBIENT TEMPERA TURE THERMIST OR
SOLID STATE RELAY
TERMINAL BLOCK
TERMINAL BLOCK
15
SYMBOL
T61
X52
X62
21S4
52C
TRANSFORMER
COMPRESSOR AUXILIARY RELAY
R.V. COIL RELAY
R.V. COIL
COMPRESSOR CONTACTOR
SG79J604H02
7
REFRIGERANT SYSTEM DIAGRAM
Unit: inch
MSH24WN MUH24WN
INDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12(main)
Indoor coil
thermistor
RT13(sub)
Strainer
#50
Refrigerant pipe [5/8
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe [3/8
(with heat insulator)
4-way valve
Muffler
Stop valve
(with service port)
FUSIBLE
PLUG
SERVICE
PORT
Accumulator
Strainer
#100
Stop valve
Strainer
#100
SERVICE
Discharge
thermistor
RT62
Compressor
Capillary tube
Check
O.D. 0.17✕I.D. 0.12✕11-13/16
valve
Capillary tube
O.D. 0.17✕I.D. 0.12✕1-31/32
LEV
PORT
Strainer
#100
OUTDOOR UNIT
Outdoor
heat
Defrost
thermistor
RT61
Refrigerant flow in cooling
Refrigerant flow in heating
exchanger
Ambient
temperature
thermistor
RT63
R.V. coil
heating ON
cooling OFF
16
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