Table of Contents
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Service Manual
CS-MC120KE / CU-MC240KE
Multi-Split Air Conditioner
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 distribu-
tion is a violation of law.
ORDER NO. MAC9611041C2
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Summary of Contents for Panasonic CS-MC120KE
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Page 1: Table Of Contents
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 .......... -
Page 2: Features
CS-MC120KE WARNING 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. -
Page 3: Functions
CS-MC120KE Functions Remote Control OFF / ON I TEMP. Operation OFF / ON Room Temperature Setting • Temperature Setting (16˚C to 30˚C) • Automatic Operation MODE Operation Mode Selection 2˚C lower than standard Standard • Automatic Operation Mode AUTO •... - Page 4 CS-MC120KE Functions Indoor Unit POWER I Power Switch OFF / ON Auto Restart Control • Operation is restarted after power failure AUTO at previous setting mode. OFF / ON Auto Operation Switch Anti-Freezing Control • Used when the remote control cannot be used.
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Page 5: Functions
CS-MC120KE Functions Outdoor Unit 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. -
Page 6: Product Specification
CS-MC120KE Product Specifications Unit CS-MC120KE CU-MC240KE 3.50 × 2 - 3.45 × 2 Cooling Capacity 11,900 × 2 - 11,800 × 2 Btu/h 2.0 × 2 Moisture Removal 4.2 × 2 Pint/h Phase Single Power Source 240 - 220 Cycle... -
Page 7: Product Specification
CS-MC120KE Product Specifications Unit CS-MC120KE CU-MC240KE Heat Evaporator Description Condenser Exchanger Tube material Copper Copper Aluminium Fin material Aluminium Fin Type Corrugated Fin Slot Fin Row / Stage (Plate fin configuration, forced draft) 2 × 12 1 × 19 Size (W × H × L) 600 ×... -
Page 8: Dimensions
CS-MC120KE Dimensions CS-MC120KE <Front View> Air intake direction 2100 Air outlet direction Left piping hole Right piping hole <Back View> Installation plate hooks Remote control transmitter Liquid Drain ports side side (410) (45) Relative position between the indoor unit and the installation plate <Front View>... -
Page 9: Dimensions
CS-MC120KE Dimensions CU-MC240KE Unit A Liquid side 2-way valve Gas side 3-way valve Unit B Liquid side 2-way valve Gas side 3-way valve – 8 –... -
Page 10: Refrigeration Cycle Diagram
CS-MC120KE Refrigeration Cycle Diagram CS-MC120KE / CU-MC240KE INDOOR OUTDOOR CAPILLARY TUBE 2-WAY VALVE INTAKE TEMP. HEAT SENSOR EXCHANGER TEMP. SENSOR HEAT EXCHANGER (CONDENSER) HEAT EXCHANGER (EVAPORATOR) 3-WAY VALVE COMPRESSOR CAPILLARY TUBE 2-WAY VALVE INTAKE TEMP. HEAT SENSOR EXCHANGER TEMP. SENSOR... -
Page 11: Block Diagram
CS-MC120KE Block Diagram – 10 –... -
Page 12: Wiring Diagram
CS-MC120KE Wiring Diagram CS-MC120KE / CU-MC240KE WIRELESS ELECTRONIC WIRELESS ELECTRONIC DISPLAY LAMP DISPLAY LAMP REMOTE CONTROLLER REMOTE CONTROLLER 220-240V, 50Hz 220-240V, 50Hz CONTROL (RECEIVER) CONTROL (RECEIVER) POWER SUPPLY CORD POWER SUPPLY CORD CN-DISP(W) CN-DISP(W) CN-RCV (W) CN-RCV (W) REMOTE REMOTE CONTROL No. -
Page 13: Operation Details
CS-MC120KE Operation Details 1) Cooling Mode Operation Cooling in operation according to Remote Control setting. Time Delay Safety Control (3 minutes) • When the compressor is stopped by Power Switch, Remote Control or there is a power failure, it restarts after 3 minutes when the Power Switch, Remote Control is turned ON or the power supply is resumed. - Page 14 CS-MC120KE Operation Details Automatic Fan Speed Mode When Automatic Fan Speed is selected at Remote Control during cooling operation. • Fan speed rotates in the range of Hi to Me. • Deodorizing Control. Indoor stop stop stop stop 40" 30"...
- Page 15 CS-MC120KE Operation Details 2) Soft Dry Mode Operation • The unit starts cooling operation until the room temperature reaches the setting temperature set on the Remote Control, and then Soft Dry operation will start. • During Soft Dry operation, the Indoor Fan will operate and stop at 4-second intervals at low speed.
- Page 16 CS-MC120KE Operation Details Soft Dry Operation Time Diagram a b c d e f g h i j k l m n o p q r s t u v Intake Air Temperature Cooling ON 1.5°C Cooling OFF Set Temp.
- Page 17 CS-MC120KE Operation Details 3) Air Circulation Mode Operation • When the temperature near the ceiling reaches the setting temperature, Air Circulation Mode operation commences at low airflow volume. It stops when the temperature drops to 2°C below the setting temperature.
- Page 18 CS-MC120KE Operation Details 5) Sleep Mode Auto Operation Cooling or Soft Dry Operation 8 HOURS When you press the SLEEP Mode, the following move- 1 HOUR ment will start to avoid overcooling. • The fan speed is automatically set to Low.
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Page 19: Operation Details
CS-MC120KE Operation Details 8) Airflow Direction Control Airflow Direction Auto-Control • When set a Airflow Direction Auto-Control with Horizontal remote control, the louver swings up and down as Upper limit shown in the diagram. 34° • The louver does not swing when the Indoor Fan Swing up and down stops during operation. -
Page 20: Installation Information
CS-MC120KE Installation Information Attached accessories Accessories part Qty. Accessories part Qty. Installation plate Clamping cover of piping Vinyl tape Installation plate fixing screw Vinyl tape Remote control Battery Air purifying filter Accessories: Flaring piping kit CZ-4F5, 7, 10 AN SELECT THE BEST LOCATION INDOOR UNIT •... -
Page 21: Installation Information
CS-MC120KE Installation Information Indoor / Outdoor unit installation diagram Length of power supply cord Piping direction Attention not to bend up drain hose (Front side) about 1.8 m about 1.1 m Right Right < < < < rear Left Left... -
Page 22: 2-Way, 3-Way Valves
CS-MC120KE 2-way • 3-way Valve 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Flare nut Hexagonal wrench (4 mm) Flare nut Open position Closed position Open position Closed position piping piping connection connection Service port Service port cap... -
Page 23: Evacuation Of Installation
CS-MC120KE 1 Evacuation of Installation WHEN INSTALLING AN AIR CONDITIONER, BE If air remain in the indoor unit and refrigeration SURE TO EVACUATE THE AIR INSIDE THE INDOOR pipes, it will affect the compressor, reduce to cool- UNIT AND PIPES in the following procedure. -
Page 24: Pumping Down
CS-MC120KE 2 Pumping down (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Closed (Gas side) 3-way valve CLOSE Open Refrigerant Reclaiming Equipment CLOSE Procedure: (1) Confirm that both the 2-way and 3-way valves are (6) Operate the air conditioner at the cooling cycle set to the opened position. - Page 25 CS-MC120KE 3 Evacuation of Re-installation WHEN RE-INSTALLING AN AIR CONDITIONER, BE If air remain in the indoor unit and refrigeration SURE TO EVACUATE THE AIR INSIDE THE INDOOR pipes, it will affect the compressor, reduce to cool- UNIT AND PIPES in the following procedure.
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Page 26: Way, 3-Way Valves
CS-MC120KE 4 Balance refrigerant of the 2-way, 3-way valves (Lack of refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Open (Gas side) 3-way valve OPEN Open Refrigerant Reclaiming Equipment CLOSE Procedure: (1) Confirm that both the 2-way and 3-way valves are set to the open position. - Page 27 CS-MC120KE 5 Evacuation (No refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Open (Gas side) 3-way valve OPEN Open Vacuum pump CLOSE Procedure: (1) Connect the vacuum pump to the charge set’s centre hose. (2) Evacuation for approximately one hour.
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Page 28: Gas Charging
CS-MC120KE 6 Gas charging (After Evacuation) (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Open (Gas side) Check valve 3-way valve Open Charging cylinder OPEN CLOSE Procedure: (1) Connect the charge hose to the charging cyl- This is different from previous procedures. Because inder. -
Page 29: Servicing Information
CS-MC120KE Servicing Information Sensors Earth Wire Connector Inspection points for the Indoor Electronic Control- Electronic Controller 1. The Electronic Controller, a signal Receiver and an Indicator can be seen by removing the Front Grille Electronic and Control Board Cover, as shown in the Fig. 1. - Page 30 CS-MC120KE Servicing Information Fan Motor securing screw 3. Remove the Fan Motor Loosen the Fan Motor securing screw at the junction with Cross Flow Fan. (Fig. 5) Fig. 5 Remove the particular piece and the Fan Motor can be taken off as shown in Fig. 6 and 7.
- Page 31 CS-MC120KE Servicing Information Cross Flow Fan Removal Procedure 1. Remove the Indoor Fan Motor. (Refer to the removal procedure of the Indoor Fan Motor.) (Fig. 9) Fan Motor Fig. 9 2. Remove the Air Discharge Grille by taking off the...
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Page 32: Servicing Information
CS-MC120KE Servicing Information • Remote Control Reset Reset terminal When the batteries are inserted for the first time, or the batteries are replaced, all the indications will blink and the remote control might not work. If this happens, remove the back cover of the remote... -
Page 33: Troubleshooting Guide
CS-MC120KE Troubleshooting Guide Refrigeration cycle system In order to diagnose malfunctions, make sure that Normal Pressure and Outlet Air Temperature (Standard) there are no electrical problems before inspect- Gas pressure Outlet air ing the refrigeration cycle. Such problems include temperature... -
Page 34: Troubleshooting Guide
CS-MC120KE Troubleshooting Guide 1. Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Condition of the air High Pressure Electric current during operation Low Pressure conditioner Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer... -
Page 35: Technical Data
CS-MC120KE Technical Data L L L L L Thermostat characteristics CS-MC120KE • Soft Dry • Cooling (°C) (°C) COMP. ON Cooling ON Cooling OFF = Set temperature, COMP. OFF = Set temperature Soft Dry ON Soft Dry OFF diff. 1.5°C diff. -
Page 36: Exploded View
CS-MC120KE Exploded View CS-MC120KE " & < > – 35 –... -
Page 37: Replacement Part List
CS-MC120KE Exploded View CU-MC240KE < > " & < > " & – 37 –... -
Page 38: Replacement Parts List
CS-MC120KE Replacement Parts List <Model: CS-MC120KE> CS-MC120KE DESCRIPTION & NAME REMARKS CHASSY COMPLETE CWD50C202 FAN MOTOR CWA92231 CROSS FLOW FAN COMPLETE CWH02C053 SCREW – CROSS FLOW FAN CWH4580304 BEARING ASS’Y CWH64K007 EVAPORATOR CWB30C146 TUBE ASS’Y COMPLETE CWT01C238 FLARE NUT (1/4") CWH6002140 FLARE NUT (1/2") - Page 39 CS-MC120KE Replacement Parts List <Model: CU-MC240KE> DESCRIPTION & NAME Q’TY CU-MC240KE REMARKS CHASSY ASS’Y (UPPER) CWD50K625A FAN MOTOR BRACKET CWD54171 SCREW – FAN MOTOR BRACKET CWH4580399 FAN MOTOR CWA95319 SCREW – FAN MOTOR MOUNT CWH55027 PROPELLER FAN CWH00K040 NUT – PROPELLER FAN...
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Page 40: Electronic Parts List
CS-MC120KE Electronic Parts List <Model: CWA74859> SYMBOL DESCRIPTION & NAME PART NO. SOUND GENERATOR A48005 C–FM SH CAPACITOR A31694 DIODE A54RA15–01V3 DIODE A54CS1VB20E FUSE FUSE XBA2C31TR0 INTEGRATED CIRCUIT A52D0001W013 A52C040 INTEGRATED CIRCUIT INTEGRATED CIRCUIT A52MPA2003C INTEGRATED CIRCUIT A52BR9011B INTEGRATED CIRCUIT...