Panasonic CS-MC120KE, CU-MC240KE Service Manual
ORDER NO. MAC9611041C2
Service Manual
Multi-Split Air Conditioner
CS-MC120KE / CU-MC240KE
Contents
● Features ..........................................................1
● Functions ...................................................2 – 4
● Product Specification ................................. 5 – 6
● Dimensions ................................................7 – 8
● Refrigeration Cycle Diagram ...........................9
● Block Diagram ...............................................10
● Wiring Diagram .............................................. 11
● Operation Details ................................... 12 – 18
● Installation Information ..........................19 – 20
● 2-way, 3-way Valves..............................21 – 27
● Servicing Information ............................. 28 – 31
● Troubleshooting Guide ..........................32 – 33
● Technical Data...............................................34
● Exploded View .........................................35, 37
● Replacement Part List .............................36, 38
● Electronic Parts List ....................................... 39
1996 Matsushita Industrial Corp. Sdn. Bhd.
(11969-T)
All rights reserved. Unauthorized copying and distribution is a violation of law.
CS-MC120KE
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain
warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity
should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with
in this service information by anyone else could result in serious injury or death.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit.
Features
!
WARNING
!
PRECAUTION OF LOW TEMPERATURE
• High Efficiency
• Compact Design
• Comfort Improvement
– Wider range of horizontal discharge air
– Longer hours of sleep mode operation
• Auto Restart
– Auto restart operation after power failure
• Removable and Washable
Front Panel
• Installation Work Improvement
– Long piping up to 15 m.
• Quality Improvement
– Low voltage protection
– Gas leakage protection
– Prevent compressor reverse cycle
– 2-stage OLP to protect compressor
• Service Improvement
– Easy fan motor replacement procedure
– 1 –
Functions
Remote Control
CS-MC120KE
OFF / ON I
MODE
FAN SPEED
AIR SWING
Operation OFF / ON
Operation Mode Selection
• AUTO Automatic Operation Mode
• COOL Cooling Operation Mode
• DRY Soft Dry Operation Mode
• FAN Air Circulation Mode
Indoor Fan Speed Selection
• h j k Low Speed
l
• h j k Medium Speed
lll
• h j k High Speed
lllll
• AUTOFAN Automatic Fan Speed
Airflow Direction Control
• SWING Automatic Airflow Direction
Control
• MANUAL Airflow Direction Manual Control
TEMP.
ON-TIMER
OFF-TIMER
TIME
SET
CANCEL
CLOCK
(q)
Room Temperature Setting
• Temperature Setting (16˚C to 30˚C)
• Automatic Operation
m / n 2˚C lower than standard
n Standard
n - o 2˚C higher than standard
Timer Operation Selection
• 24-hour, OFF / ON Real Timer Setting.
Time / Timer Setting
• Hours and minutes setting.
Timer Operation Set / Cancel
• ON Timer and OFF Timer setting and
cancellation.
Clock Setting
• Current time setting.
– 2 –
SLEEP
Sleep Mode Operation OFF / ON
CS-MC120KE
Functions
Indoor Unit
POWER I
AUTO
OFF / ON
TEST RUN
OFF / ON
Power Switch OFF / ON
Auto Operation Switch
• Used when the remote control cannot be
used.
Remote Control Signal Receiving
Sound Control
• It can be controlled by pressing Auto
Operation Switch for 10 seconds.
Operation Test Running / Pump
Down Switch
• Used when test running or servicing.
Operation Indication Lamps (LED)
• POWER (Red)...... Lights up in operation,
blinks in Automatic
Operation Mode judging
• SLEEP (Orange)..... Lights up in Sleep
Mode Operation
• TIMER (Orange)..... Lights up in Timer
Setting
Operation Mode
• Cooling, Soft Dry, Air Circulation and
Automatic Mode.
Auto Restart Control
• Operation is restarted after power failure
at previous setting mode.
Anti-Freezing Control
• Anti-Freezing control for indoor heat
exchanger. (Cooling and Soft Dry)
Sleep Mode Auto Control
• Indoor Fan operates and stops at 4-second
intervals at low speed.
• Operation stops after 8 hours.
Indoor Fan Speed Control
• High, Medium and Low.
• Automatic Fan Speed Mode
– Cooling : Fan rotates at Hi and Me
speed. Deodorizing control is
available.
– Soft Dry : Fan rotates at SLo and Lo
speed. Deodorizing control is
available.
Airflow Direction Control
• Automatic air swing and manual adjusted
by remote control for vertical airflow.
• Manually adjusted by hand for horizontal
airflow.
Time Delay Safety Control
• Restarting is inhibited for appro. 3 minutes.
7 Minutes Time Save Control
• Cooling Operation only.
– 3 –
Functions
Outdoor Unit
CS-MC120KE
Compressor Reverse Rotation
Protection Control
• To protect compressor from reverse
rotation when there is a instantaneous
power failure.
Overload Protector
• 2-Stage OLP to protect the compressor.
Overload Protector will trip when
– Temperature of compressor increases to
120°C.
– High temperature or high current flows to
compressor.
(Refer circuit diagram for OLP
characteristic)
60 Secs. Forced Operation Control
• Once the compressor is activated, it does
not stop for 60 secs. (Stops immediately
with remote control stop signal.)
Outdoor Fan Operation Control
•
Inner protector.
– 4 –
CS-MC120KE
Product Specifications
Cooling Capacity
Moisture Removal
Power Source
Airflow Method
Air Volume
Noise Level
Electrical
Data
Indoor Air (Lo)
Indoor Air (Me)
Indoor Air (Hi)
Outdoor Air
Input
Running Current
Unit
kW
Btu/h
s/h
Pint/h
Phase
V
Cycle
OUTLET
INTAKE
3
/min (cfm)
m
3
m
/min (cfm)
3
m
/min (cfm)
m3/min (cfm)
dB (A)
W
A
CS-MC120KE
3.50 × 2 - 3.45 × 2
11,900 × 2 - 11,800 × 2
240 - 220
SIDE VIEW
7.3 (260)
7.6 (270)
8.3 (290)
–
High 39 - 39, Low 36 - 35
1,260 × 2 - 1,210 × 2
5.7 × 2 - 5.7 × 2
CU-MC240KE
2.0 × 2
4.2 × 2
Single
50
TOP VIEW
–
–
–
22.0 (780)
(1 Unit) (2 Unit)
High 49 - 48, High 52 - 51
COP
Starting Current
Piping Connection Port
(Flare piping)
Pipe Size
(Flare piping)
Drain
Hose
Power Cord Length
Dimensions
Net Weight
Compressor
Air Circulation
Inner diameter
Length
Number of core-wire
Motor Type
Rated Output
Motor Type
Fan Low
Speed Medium
Height
Width
Depth
Type
Type
Material
Input
Rated Output
High
W/W
A
inch
inch
inch
inch
mm
m
m
inch (mm)
inch (mm)
inch (mm)
lb (kg)
W
W
W
rpm
rpm
rpm
G ; Half Union 1/2"
L ; Half Union 1/4"
G (gas side) ; 1/2"
L (liquid side) ; 1/4"
12
0.7
2.1
2
3 (1.0 mm
11-7/16 (290)
31-15/32 (799)
6-29/32 (175)
18 (8.0)
Cross-flow Fan
AS + Glass Fiber 30%
Induction (4-poles)
)
–
–
–
27
10
1,200
1,250
1,360
2.7 - 2.8
25 × 2
G ; 3-way valve 1/2"
L ; 2-way valve 1/4"
G (gas side) ; 1/2"
L (liquid side) ; 1/4"
–
–
–
–
41-5/32 (1045)
30-23/32 (780)
9-21/32 (245)
179 (81)
Rotary (1 cylinder)
rolling piston type
Induction (2-poles)
1,100 × 2
Propeller Fan
AES + Glass Fiber 16%
Induction (6-poles)
60.7 × 2
20 × 2
–
–
730
– 5 –
Product Specifications
CS-MC120KE
Unit
Heat
Exchanger
Refrigerant Control Device
Refrigeration Oil
Refrigerant (R-22)
Thermostat
Protection Device
Capillary Tube
Air Filter
Capacity Control
Compressor Capacitor
Fan Motor Capacitor
• Specifications are subject to change without notice for further improvement.
Description
Tube material
Fin material
Fin Type
Row / Stage
FPI
Size (W × H × L)
Length
Flow Rate
Inner Diameter
Material
Style
mm
(c.c)
g (oz)
mm
s/min
mm
µF, VAC
µF, VAC
CS-MC120KE
Evaporator
Copper
Aluminium
Slot Fin
(Plate fin configuration, forced draft)
2 × 12
21
600 × 252 × 25.4
–
–
–
Electronic Control
–
–
–
–
P.P.
Honeycomb
Capillary Tube
–
1.0 µF, 450 VAC
2-Stage Overload Protector
(Upper unit)1.0 µF, 400 VAC
(Lower unit)1.2 µF, 400 VAC
CU-MC240KE
Condenser
Copper
Aluminium
Corrugated Fin
1 × 19
21
776.2 × 482.6 × 22
Capillary Tube
SUNISO 4GDID or
ATMOS M60 (430 × 2)
670 × 2 (23.7 × 2)
–
560
16.7
1.7
–
30 µF, 370 VAC
– 6 –
CS-MC120KE
Dimensions
CS-MC120KE
Air intake
direction
<Front View>
790
175
Air outlet
direction
Left piping hole
290
55
<Back View>
60
Installation plate hooks
Drain ports
60
Gas
side
Liquid
side
(45)(410)
115
2100
48.5
290
52
Right piping hole
Remote control transmitter
57
61
34.5
142
16
Relative position between the indoor unit and the installation plate <Front View>
(40)
Installation plate
Indoor unit external
dimensions line
7
276
7
(60)
Left piping hole
Centre notch
100 100
Arrow
Centre
710
457
350
Arrow
Installation plate positioning gauge
– 7 –
Slot (2 places)
Slot (2 places)
(40)
(110)
13.5
Right piping hole
Dimensions
CU-MC240KE
112
780 57 245
67466
CS-MC120KE
Unit A
Liquid side
2-way valve
Gas side
3-way valve
1045
67104
105105 570 280
312
Unit B
Liquid side
2-way valve
Gas side
3-way valve
– 8 –
CS-MC120KE
Refrigeration Cycle Diagram
CS-MC120KE / CU-MC240KE
INDOOR OUTDOOR
INTAKE
AIR
TEMP.
SENSOR
HEAT
EXCHANGER
TEMP.
SENSOR
CAPILLARY TUBE
2-WAY
VALVE
HEAT EXCHANGER
(EVAPORATOR)
INTAKE
AIR
TEMP.
SENSOR
HEAT EXCHANGER
(EVAPORATOR)
HEAT
EXCHANGER
TEMP.
SENSOR
3-WAY
VALVE
2-WAY
VALVE
HEAT EXCHANGER
(CONDENSER)
COMPRESSOR
CAPILLARY TUBE
HEAT EXCHANGER
(CONDENSER)
3-WAY
VALVE
– 9 –
COMPRESSOR
Block Diagram
22
11
3C
"C"
FUSE
3.15A
RY-C
RECEIVER
P.C.B.
SINGLE PHASE
AC 220-240V
50Hz
RY-H
TRANS-
FORMER
THERMAL
FUSE
(99°C)
(102°C)
FUSE
THERMAL
ZNR
FAN
MOTOR
POWER SWITCH
ELECTRONIC CONTROLLER
Indicates the electronic control unit.
Indicates the number of core wires. (Example:6C=6 core wires).
COMP
O.L.P.
FAN
MOTOR
RY-M
P.C.B.
INDICATOR
4C
5C
STEPPING
MOTOR
INDOOR UNIT OUTDOOR UNIT
WIRELESS
REMOTE CONTROL
TRANSMITTER
5A
FUSE
ZNR
SSR
MAIN
CS-MC120KE
CS-MC120KE / CU-MC240KE
– 10 –
CS-MC120KE
21
12
TERMINAL
INDOOR UNIT
TERMINAL
OUTDOOR UNIT
CN-RCV(W)
CN-DISP(W)
MAIN SW
432
1234
MOTOR
CN-STM(G) CN-TH(Y)
123454321
(INTAKE TEMP.)
SENSOR
YELLOW
REDBLUE
COMPRESSOR TERMINAL
BRAND MARK
CAPACITOR
FAN MOTOR
CAPACITOR
R
B
B
Y
R
B
B
B
B
B
WWW
W
Y/G
B
BR
POWER SUPPLY CORD
DISPLAY LAMP
CN-DISP(W)
CONTROL
REMOTE
WIRELESS
CONTROLLER
ELECTRONIC
(RECEIVER)
CN-RCV (W)
AUTO SW
PUMP DOWN SW
TRANSFORMER
RY-C
RY-M
RY-H
ZNR
CN-FM(G)
CAPACITOR
SSR
FAN
MOTOR
P
L
FUSE(3.15A)
BR
W
135
Y
BR
O
13
B
R
T(BL) T(BL)
W
W
BL
Y/G
Y
P
Y
O
R
BR
BA
REMOTE
CONTROL No.
2
13
4 ELECTRONIC CONTROLLER
(G)
CN-C
COMPRESSOR
1
ELECTRONIC
CONTROLLER
BL
BL
220-240V, 50Hz
LOUVER
3
2
1
7
BL
321
(TEST RUN)
ZNR
OLP (W)
SENSOR
(PIPE TEMP.)
R
R
THERMAL
FUSE
(99°C)
(102°C)
FUSE
THERMAL
RR
W
W
FUSE 5A
13
B
CR1
CN-T(W)
CN-FUSE(B)
PROTECTOR
OVER LOAD
GRY
1
2
W
Wiring Diagram
CS-MC120KE / CU-MC240KE
POWER SUPPLY CORD
REMARKS:
B : BLUE
BR : BROWN
BL : BLACK
W : WHITE
R : RED
O : ORANGE
P : PINK
Y/G : YELLOW/
GRY : GRAY
220-240V, 50Hz
BR
Y/G
B
2
4 ELECTRONIC CONTROLLER
13
MAIN SW
W
BR
CN-C
(G)
W
RY-C
P
L
THERMAL
FUSE
(99°C)
W
BL
Y/G
INDOOR UNIT
TERMINAL
OUTDOOR UNIT
TERMINAL
GRY
R
OVER LOAD
ELECTRONIC
CONTROLLER
1
2
PROTECTOR
Y
OLP (W)
W
W
12
B
B
B
CAPACITOR
B
COMPRESSOR
W
GREEN
DISPLAY LAMP
CN-DISP(W)
1234
WWW
W
1
432
CN-DISP(W)
R
B
CN-FM(G)
13
CAPACITOR
CR1
FUSE(3.15A)
T(BL) T(BL)
BL
TRANSFORMER
21
Y
FUSE 5A
B
CAPACITOR
BL
R
R
MOTOR
FAN
Y
135
ZNR
CN-T(W)
FAN MOTOR
WIRELESS
REMOTE
CONTROL
REMOTE
CONTROL No.
BA
O
BL
BR
7
RY-M
RY-H
ZNR
SSR
13
CN-FUSE(B)
RR
THERMAL
FUSE
(102°C)
BRAND MARK
COMPRESSOR TERMINAL
R
YELLOW
1
2
3
CN-RCV(W)
123454321
CN-STM(G) CN-TH(Y)
ELECTRONIC
CONTROLLER
(RECEIVER)
CN-RCV (W)
321
B
B
B
PUMP DOWN SW
(TEST RUN)
AUTO SW
BR
R
MOTOR
O
LOUVER
Y
P
SENSOR
(INTAKE TEMP.)
SENSOR
(PIPE TEMP.)
REDBLUE
Resistance of Indoor Fan Motor Windings
CONNECTION
YELLOW - BLUE
YELLOW - BROWN
BROWN - ORANGE
ORANGE - RED
CWA92231 (Ω)
515.9
139.3
28.3
311.9
Resistance of Outdoor Fan Motor Windings
CONNECTION
BLUE - YELLOW
YELLOW - RED
CWA95319 (Ω)
260.5
446.0
Resistance of Compressor Windings
CONNECTION
C-R
C-S
2KS224D5AC02 (Ω)
2.45
3.86
– 11 –
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