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Panasonic CS-MC120KE Service Manual
Service Manual
Multi-Split Air Conditioner
Contents
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Features .......................................................... 1
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Functions ................................................... 2 – 4
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Product Specification ................................. 5 – 6
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Dimensions ................................................ 7 – 8
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Refrigeration Cycle Diagram ........................... 9
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Block Diagram ............................................... 10
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Wiring Diagram .............................................. 11
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Operation Details ................................... 12 – 18
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Installation Information .......................... 19 – 20
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2-way, 3-way Valves .............................. 21 – 27
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Servicing Information ............................. 28 – 31
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Troubleshooting Guide .......................... 32 – 33
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Technical Data ............................................... 34
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Exploded View ......................................... 35, 37
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Replacement Part List ............................. 36, 38
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Electronic Parts List ....................................... 39
CS-MC120KE / CU-MC240KE
ORDER NO. MAC9611041C2
1996 Matsushita Industrial Corp. Sdn. Bhd.
(11969-T)
All rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
Untitled-1
6/30/00, 1:15 PM
1
Summary of CS-MC120KE
Page 1
Service manual multi-split air conditioner contents ● features .......................................................... 1 ● functions ................................................... 2 – 4 ● product specification ................................. 5 – 6 ● dimensions ................................
Page 2: Features
– 1 – mac9611041c2 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. ...
Page 3: Functions
– 2 – mac9611041c2 cs-mc120ke remote control functions operation off / on off / on i room temperature setting temp. • 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 operation mode selection • auto automatic operation m...
Page 4: Functions
– 3 – mac9611041c2 cs-mc120ke indoor unit functions power switch off / on power i 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. Auto off / on operation test r...
Page 5: Functions
– 4 – mac9611041c2 cs-mc120ke compressor reverse rotation protection control outdoor unit functions • 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 o...
Page 6: Product Specifications
– 5 – mac9611041c2 cs-mc120ke product specifications inner diameter length input running current cop starting current cooling capacity moisture removal power source airflow method air volume noise level electrical data piping connection port (flare piping) pipe size (flare piping) drain hose power c...
Page 7: Product Specifications
– 6 – mac9611041c2 cs-mc120ke product specifications description tube material fin material fin type row / stage fpi size (w × h × l) µ f, vac µ f, vac length flow rate inner diameter material style heat exchanger refrigerant control device refrigeration oil refrigerant (r-22) thermostat protection ...
Page 8: Dimensions
– 7 – mac9611041c2 cs-mc120ke dimensions cs-mc120ke relative position between the indoor unit and the installation plate 790 48.5 60 290 175 61 34.5 52 direction air intake air outlet direction left piping hole right piping hole 290 115 55 60 2100 57 142 16 remote control transmitter (45) (410) inst...
Page 9: Dimensions
– 8 – mac9611041c2 cs-mc120ke dimensions cu-mc240ke 67 104 105 105 570 280 312 112 67 466 1045 780 57 245 gas side 3-way valve liquid side 2-way valve unit a unit b 2-way valve liquid side 3-way valve gas side untitled-2 6/30/00, 1:17 pm 8.
Page 10: Refrigeration Cycle Diagram
– 9 – mac9611041c2 cs-mc120ke refrigeration cycle diagram cs-mc120ke / cu-mc240ke compressor sensor temp. Air heat exchanger temp. Indoor outdoor heat exchanger (evaporator) heat exchanger (condenser) 2-way valve valve 3-way capillary tube sensor intake intake sensor capillary tube 3-way valve valve...
Page 11: Block Diagram
– 10 – mac9611041c2 cs-mc120ke block diagram cs-mc120ke / cu-mc240ke 2 2 1 1 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. Indica...
Page 12: Wiring Diagram
– 11 – mac9611041c2 cs-mc120ke wiring diagram cs-mc120ke / cu-mc240ke 2 1 1 2 terminal indoor unit terminal outdoor unit cn-rcv(w) cn-disp(w) main sw 4 3 2 1 2 3 4 motor cn-stm(g) cn-th(y) 1 2 3 4 5 4321 (intake temp.) sensor yellow red blue compressor terminal brand mark capacitor fan motor capacit...
Page 13: Operation Details
– 12 – mac9611041c2 cs-mc120ke operation details 1) cooling mode operation cooling in operation according to remote control setting. • 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 turn...
Page 14: Operation Details
– 13 – mac9611041c2 cs-mc120ke 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. Operation details cooling 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 w...
Page 15: Operation Details
– 14 – mac9611041c2 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 s...
Page 16: Operation Details
– 15 – mac9611041c2 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 basic time compressor indoor fan outdoor fan operation led 10’ 1’ 1’ 1’ 6’ 6’ 6’ 6’ 4’ 1’ cooling on cooling off soft dry on soft dry off 1.5°c 1.0°c slo slo slo slo slo slo s...
Page 17: Operation Details
– 16 – mac9611041c2 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. Air ...
Page 18: Operation Details
– 17 – mac9611041c2 cs-mc120ke operation details 5) sleep mode auto operation cooling or soft dry operation 6) auto restart control • if there is a power failure, operation will be automatically restarted when the power is resumed. It will start with previous operation mode and airflow direction. (t...
Page 19: Operation Details
– 18 – mac9611041c2 cs-mc120ke operation details * the left and right airflow direction louvers can be adjusted manually. Lower limit for cooling mode and soft dry mode lower limit for air circulation mode • when set a airflow direction auto-control with remote control, the louver swings up and down...
Page 20: Installation Information
– 19 – mac9611041c2 cs-mc120ke no. 1 2 3 4 5 accessories part installation plate installation plate fixing screw remote control battery air purifying filter model mc120k piping size gas 1/2" liquid 1/4" rated length 7 max. Elevation (m) 5 max. Piping length (m) 15 additional refrigerant (g/m) 15 no....
Page 21: Installation Information
– 20 – mac9611041c2 cs-mc120ke installation information indoor / outdoor unit installation diagram length of power supply cord piping direction attention not to bend up drain hose about 1.1 m about 1.8 m right rear right bottom left rear left bottom left (front side) right installation parts you mus...
Page 22: 2-Way
– 21 – cs-mc120ke mac9611041c2 shaft position closed (with valve cap) closed (clockwise) open (with valve cap) open (counter-clockwise) open open open open 2-way valve (liquid side) 3-way valve (gas side) works shipping evacuation installation and re-installation operation pumping down (transferring...
Page 23
– 22 – mac9611041c2 cs-mc120ke 1 evacuation of installation when installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedure. If air remain in the indoor unit and refrigeration pipes, it will affect the compressor, reduce to cool- ing capaci...
Page 24
– 23 – cs-mc120ke mac9611041c2 2 pumping down procedure: (1) confirm that both the 2-way and 3-way valves are set to the opened position. ● remove the valve stem caps and confirm that the valve stems are in the opened position. ● be sure to use a hexagonal wrench to operate the valve stems. (2) oper...
Page 25
– 24 – mac9611041c2 cs-mc120ke 3 evacuation of re-installation when re-installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedure. If air remain in the indoor unit and refrigeration pipes, it will affect the compressor, reduce to cool- ing ...
Page 26
– 25 – cs-mc120ke mac9611041c2 4 balance refrigerant of the 2-way, 3-way valves (lack of refrigerant in the refrigeration cycle) (indoor unit) (liquid side) (gas side) open close lo hi refrigerant reclaiming equipment 3-way valve open 2-way valve open (outdoor unit) procedure: (1) confirm that both ...
Page 27
– 26 – mac9611041c2 cs-mc120ke 5 evacuation (no refrigerant in the refrigeration cycle) procedure: (1) connect the vacuum pump to the charge set’s centre hose. (2) evacuation for approximately one hour. ● confirm that the gauge needle has moved toward –0.1 mpa (–76 cmhg) [vacuum of 4 mmhg or less.] ...
Page 28
– 27 – cs-mc120ke mac9611041c2 6 gas charging (after evacuation) procedure: (1) connect the charge hose to the charging cyl- inder. ● connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. (2) purge the air from the charge hose. ● open the val...
Page 29: Servicing Information
– 28 – mac9611041c2 cs-mc120ke servicing information ● inspection points for the indoor electronic control- ler 1. The electronic controller, a signal receiver and an indicator can be seen by removing the front grille and control board cover, as shown in the fig. 1. ● indoor fan motor removal proced...
Page 30: Servicing Information
– 29 – mac9611041c2 cs-mc120ke servicing information 3. Remove the fan motor loosen the fan motor securing screw at the junction with cross flow fan. (fig. 5) remove the particular piece and the fan motor can be taken off as shown in fig. 6 and 7. 4. To fix the indoor fan motor, ensure that the fan ...
Page 31: Servicing Information
– 30 – mac9611041c2 cs-mc120ke ● cross flow fan removal procedure 1. Remove the indoor fan motor. (refer to the removal procedure of the indoor fan motor.) (fig. 9) 2. Remove the air discharge grille by taking off the screws that hold the air discharge grille and then pull the air discharge grille i...
Page 32: Servicing Information
– 31 – mac9611041c2 cs-mc120ke servicing information ● by adding a jumper wire to the remote control side and a carbon resistor (1/4 w, 10 k Ω ) to the indoor printed circuit board, it is possible to select 4 types of transmission codes including one at time of delivery condition (1). Remote control...
Page 33: Troubleshooting Guide
– 32 – mac9611041c2 cs-mc120ke refrigeration cycle system in order to diagnose malfunctions, make sure that there are no electrical problems before inspect- ing the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor or a fan...
Page 34: Troubleshooting Guide
– 33 – cs-mc120ke mac9611041c2 2. Diagnosis methods of a malfunction of a compressor nature of fault insufficient compressing of a compressor locked compressor symptom 1. Relationship between the condition of the air conditioner and pressure and electric current cooling mode condition of the air con...
Page 35: Technical Data
– 34 – mac9611041c2 cs-mc120ke technical data l l l l l thermostat characteristics cs-mc120ke • cooling 16 16 (°c) thermostat setting (remote control) intake air temperature / comp. Off = set temperature / comp. On 18 28 26 24 22 20 30 18 20 22 24 26 28 30 32 34 (°c) / diff. 1.5°c / / / cooling on /...
Page 38: Replacement Parts List
– 36 – mac9611041c2 cs-mc120ke replacement parts list description & name chassy complete fan motor cross flow fan complete screw – cross flow fan bearing ass’y evaporator tube ass’y complete flare nut (1/4") flare nut (1/2") discharge grille complete motor – air swing tap – drain tray vane control b...
Page 39: Replacement Parts List
– 38 – mac9611041c2 cs-mc120ke description & name chassy ass’y (upper) fan motor bracket screw – fan motor bracket fan motor screw – fan motor mount propeller fan nut – propeller fan compressor anti – vibration bushing nut – compressor mount condenser holder coupling ass‘y 3-way valve 2-way valve tu...
Page 40: Electronic Parts List
– 39 – cs-mc120ke mac9611041c2 electronic parts list description & name sound generator sh capacitor diode diode fuse integrated circuit integrated circuit integrated circuit integrated circuit integrated circuit v–coil transistor transistor transistor transistor electro magnetic relay electro magne...