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Panasonic CS-MA120KE Service Manual

Manual is about: Multi-Split Air Conditioners

Summary of CS-MA120KE

  • Page 1

    Service manual multi-split air conditioners contents ● features .......................................................... 1 ● functions ................................................... 2 – 4 ● product specifications ............................. 5 – 10 ● dimensions .................................

  • Page 2: Features

    – 1 – cs-a90ke cs-ma90ke mac9509078c2 precaution of low temperature in order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit. • high efficiency • compact design • comfort improvement – wider range of horizontal discharge air – lo...

  • Page 3: Functions

    – 2 – mac9509078c2 cs-ma90ke remote control functions operation off / on off / on l 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 mo...

  • Page 4: Functions

    – 3 – cs-a90ke cs-ma90ke mac9509078c2 indoor unit functions power switch off / on power l 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 operatio...

  • Page 5: Functions

    – 4 – mac9509078c2 cs-ma90ke compressor reverse rotation protection control outdoor unit functions • to protect compressor from reverse rotation when there is a instantaneous power failure. Overload protector • cs-ma90ke and cs-ma120ke 2-stage olp to protect the compressor. Overload protector will t...

  • Page 6: Product Specifications

    – 5 – cs-a90ke cs-ma90ke mac9509078c2 2.05 - 2.00, 3.50 - 3.45 7,000 - 6,800, 11,900 - 11,800 2.15 - 2.10, 4.10 - 4.00 7,300 - 7,200, 14,000 - 13,600 1.3, 2.0 2.7, 4.2 single 240 - 220 50 cooling ; 660 - 600, 1,250 - 1,220 heating ; 640 - 600, 1,280 - 1,230 cooling ; 3.2 - 3.0, 5.6 - 5.7 heating ; 3...

  • Page 7: Product Specifications

    – 6 – mac9509078c2 cs-ma90ke (plate fin configuration, forced draft) capillary tube cu-ma190ke condenser copper aluminium corrugated fin 1 × 18 2 × 19 19 16 856 × 457.2 × 22 706.2 × 482.6 × 44 669.9 capillary tube suniso 4gdid or atmos m60 (290, 430) 860, 1,100 (30.4, 38.8) – overload protector cool...

  • Page 8: Product Specifications

    – 7 – cs-a90ke cs-ma90ke mac9509078c2 product specifications inner diameter length input running current cop starting current cooling capacity heating capacity moisture removal power source airflow method air volume noise level electrical data piping connection port (flare piping) pipe size (flare p...

  • Page 9: Product Specifications

    – 8 – mac9509078c2 cs-ma90ke heat exchanger refrigerant control device refrigeration oil refrigeration (r-22) thermostat protection device capillary tube air filter capacity control compressor capacitor fan motor capacitor description tube material fin material fin type row / stage fpi size (w × h ×...

  • Page 10: Product Specifications

    – 9 – cs-a90ke cs-ma90ke mac9509078c2 product specifications inner diameter length input running current cop starting current cooling capacity heating capacity moisture removal power source airflow method air volume noise level electrical data piping connection port (flare piping) pipe size (flare p...

  • Page 11: Product Specifications

    – 10 – mac9509078c2 cs-ma90ke product specifications description tube material fin material fin type row / stage fpi size (w × h × l) cs-ma120ke evaporator copper aluminium slot fin 2 × 12 21 600 × 252 × 25.4 – – – electronic control – – – – p.P. Honeycomb – – length flow rate inner diameter materia...

  • Page 12: Dimensions

    – 11 – cs-a90ke cs-ma90ke mac9509078c2 dimensions cs-ma70ke / cs-ma90ke / cs-ma120ke 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 co...

  • Page 13: Dimensions

    – 12 – mac9509078c2 cs-ma90ke a cu-ma180k 985 cu-ma240k 1045 cu-ma190k 1015 cu-ma180ke, cu-ma190ke, cu-ma240ke 67 104 105 105 570 280 312 67 a 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 dimensions a untitled-4 6/30/00, 7:51 am 1...

  • Page 14: Refrigeration Cycle Diagram

    – 13 – cs-a90ke cs-ma90ke mac9509078c2 refrigeration cycle diagram cs-ma90ke / cu-ma180ke cs-ma120ke / cu-ma240ke cs-ma70ke / cu-ma190ke cs-ma120ke comp. 4-way valve c1 c3 c2 check valve pipe temp. Sensor (t.R.S) sensor temp. Intake pipe temp. Sensor indoor outdoor cooling heating heat exchanger (ev...

  • Page 15: Block Diagram

    – 14 – mac9509078c2 cs-ma90ke block diagram "c" indicates the electronic control unit. Indicates the number of core wires. (example:5c=5 core wires). Cs-ma90ke / cu-ma180ke cs-ma120ke / cu-ma240ke cs-ma70ke / cu-ma190ke cs-ma120ke fuse znr1 znr2 3 4 1 transformer fm ct1 stepping 3c 4c 5c receiver p....

  • Page 16: Wiring Diagram

    – 15 – mac9509078c2 cs-ma90ke wiring diagram cs-ma70ke cu-ma190ke cs-ma120ke w cn-disp (w) 3 2 1 (pipe temp.) sensor sensor (intake temp.) p 5 y o r br cn-stm (g) cn-th (y) 1 32 4 (flap) motor 4 2 31 (102 ° c) thermal fuse y/g 2 1 3 1 ac(w) 2.0a fuse l p cn-mtr (g) w w w w y r b motor fan 1 2 3 auto...

  • Page 17: Wiring Diagram

    – 16 – mac9509078c2 cs-ma90ke wiring diagram cs-ma90ke / cu-ma180ke cs-ma120ke / cu-ma240ke w cn-disp (w) 3 2 1 (pipe temp.) sensor sensor (intake temp.) p 5 y o r br cn-stm (g) cn-th (y) 1 32 4 (flap) motor 4 2 31 (102°c) thermal fuse y/g 2 1 3 1 ac(w) 3.15a fuse l p cn-mtr (g) w w w w y r b motor ...

  • Page 18: Operation Details

    – 17 – mac9509078c2 cs-ma90ke operation details time delay safety control (3 minutes) 7 minutes time saved control anti-freezing control compressor reverse rotation protection control compressor restarts (3 minutes waiting) compressor off ➡ ➡ 1) cooling mode operation cooling in operation according ...

  • Page 19: Operation Details

    – 18 – mac9509078c2 cs-ma90ke 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 indoor fan comp. Slo slo slo slo on on off sto...

  • Page 20: Operation Details

    – 19 – mac9509078c2 cs-ma90ke operation details time delay safety control anti-freezing control compressor reverse rotation protection automatic fan speed mode 2) soft dry mode operation • the unit starts cooling operation until the room temperature reaches the setting temperature set on the remote ...

  • Page 21: Operation Details

    – 20 – mac9509078c2 cs-ma90ke 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 4-way valve 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 sl...

  • Page 22: Operation Details

    – 21 – mac9509078c2 cs-ma90ke operation details time delay safety control ➡ ➡ compressor reverse rotation protection control ➡ ➡ 4-way valve control compressor off compressor restarts (4 minutes waiting) compressor restarts (4 minutes waiting) compressor off 1234567890123456789012 123456789012345678...

  • Page 23: Operation Details

    – 22 – mac9509078c2 cs-ma90ke operation details automatic fan speed mode when automatic fan speed is selected at remote control during heating operation. • fan speed rotates in the range of me ➔ slo according to the heat exchanger temperature. Slo lo- 45 41 34 30 38 ( ° c) ( ° c) heat exchanger temp...

  • Page 24: Operation Details

    – 23 – mac9509078c2 cs-ma90ke operation details deicing control deice starts to prevent frosting at outdoor heat exchanger. • normal deicing deice operation detection commences after 30 minutes of heating operation starts or 60 minutes after previous deice operation. If the trs (thermal reed switch)...

  • Page 25: Operation Details

    – 24 – mac9509078c2 cs-ma90ke normal deicing time diagram operation details overload deicing time diagram a – c : deicing operation judging condition established c – d : deicing operation (timer detected) d – e, l – m : time delay for 4-way valve e – f, m – n : time delay for compressor f – g, n – o...

  • Page 26: Operation Details

    – 25 – mac9509078c2 cs-ma90ke 4) automatic mode operation standard for determining operation mode (a) indoor fan operates at slo fan speed for 20 seconds. (b) after judging indoor air temperature, the operation mode is determined and operation continued at the mode determined. (c) if indoor intake a...

  • Page 27: Operation Details

    – 26 – mac9509078c2 cs-ma90ke operation details 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. (time delay safety control is valid) • auto restart control is...

  • Page 28: Operation Details

    – 27 – mac9509078c2 cs-ma90ke 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 heating mode • when set a airflow direction auto-control with remote control, the louver swings up and down as shown...

  • Page 29: Installation Information

    – 28 – mac9509078c2 cs-ma90ke installation information attached accessories accessories: flaring piping kit cz-4f5, 7, 10 an select the best location • there should not be any heat source or steam near the unit. • there should not be any obstacles blocking the air circulation. • a place where air ci...

  • Page 30: Installation Information

    – 29 – mac9509078c2 cs-ma90ke 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 must...

  • Page 31: 2-Way

    – 30 – cs-ma90ke 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) evacuation (...

  • Page 32

    – 31 – cs-ma90ke 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 capacity, and could ...

  • Page 33

    – 32 – cs-ma90ke 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) operate the unit f...

  • Page 34

    – 33 – cs-ma90ke 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 capacity, and ...

  • Page 35

    – 34 – cs-ma90ke 4 balance refrigerant of the 2-way, 3-way valve (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 the 2-way and 3...

  • Page 36

    – 35 – cs-ma90ke 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.] (3) close the ...

  • Page 37

    – 36 – cs-ma90ke 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 valve at the bott...

  • Page 38: Servicing Information

    – 37 – cs-ma90ke 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 procedure 1. Remove ...

  • Page 39: Servicing Information

    – 38 – cs-ma90ke 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 motor securing...

  • Page 40: Servicing Information

    – 39 – cs-ma90ke ● 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 in a down and f...

  • Page 41: Servicing Information

    – 40 – cs-ma90ke 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 1 2 3 4 switc...

  • Page 42: Troubleshooting Guide

    – 41 – cs-ma90ke mac9509078c2 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 43: Troubleshooting Guide

    – 42 – cs-ma90ke mac9509078c2 2. Diagnosis methods of a malfunction of a compressor and a 4-way valve nature of fault insufficient compressing of a compressor locked compressor inefficient switches of the 4-way valve symptom 1. Relationship between the condition of the air conditioner and pressure a...

  • Page 44: Technical Data

    – 43 – cs-ma90ke mac9509078c2 / comp. Off = set temperature / comp. On / diff. 2.0°c 16 (°c) thermostat setting (remote control) 18 28 26 24 22 20 30 (°c) 16 18 28 26 24 22 20 30 32 34 intake air temperature / / / cooling on / / diff. 1.5°c 16 16 (°c) intake air temperature / soft dry off, soft dry ...

  • Page 45: Technical Data

    – 44 – cs-ma90ke mac9509078c2 technical data • piping length characteristic (cooling) • cooling characteristic l l l l l operation characteristics cs-ma70ke, cs-ma120ke / cu-ma190ke 30 32 34 36 38 40 42 44 outdoor air temperature ( ° c) [condition] room temperature: 27/19 ° c cooling operation: at h...

  • Page 46: Technical Data

    – 45 – cs-ma90ke mac9509078c2 -4 -2 0 2 4 6 8 10 outdoor air temperature ( ° c) [condition] room temperature: 20 ° c heating operation: at high fan piping length: 5 m 5 4 3 2 40 38 36 13 34 32 1.7 1.6 1.5 1.4 1.3 1.2 3.6 3.4 3.2 3.0 2.8 2.6 220v 240v i: q: current (a) - heating capacity (kw) - hp: o...

  • Page 47: Technical Data

    – 46 – cs-ma90ke mac9509078c2 30 32 34 36 38 40 42 44 outdoor air temperature ( ° c) [condition] room temperature: 27/19 ° c cooling operation: at high fan piping length: 5 m 8 7 6 5 14 13 12 11 10 0.65 0.60 0.55 0.50 0.45 3.8 3.6 3.4 3.2 3.0 2.8 220v 240v i: q: current (a) - cooling capacity (kw) -...

  • Page 52: Replacement Parts List

    – 48 – cs-ma90ke mac9509078c2 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") or (3/8") discharge grille complete motor – air swing tap – drain tray vane ...

  • Page 53: Replacement Parts List

    – 50 – cs-ma90ke mac9509078c2 replacement parts list no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 44 45 46 47 48 remarks t t t t t t t t t t t t t qty 1 1 8 2 6 2 2 1 3 3 1 1 1 1 1 1 2 1 1 1 1 1 1 2 1 1 1 1 1 2 2 4 2 2 2 2 1 1 ...

  • Page 54: Replacement Parts List

    – 52 – cs-ma90ke mac9509078c2 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") or (3/8") discharge grille complete motor – air swing tap – drain tray vane ...

  • Page 55: Replacement Parts List

    – 54 – cs-ma90ke mac9509078c2 replacement parts list no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 remarks t t t t t t t t t t t t t qty 1 2 8 2 6 2 2 2 6 6 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1, 1 4 2 2...

  • Page 56: Electronic Parts List

    – 55 – cs-ma90ke mac9509078c2 electronic parts list description & name sound generator transformer diode diode diode diode diode diode diode diode fuse integrated circuit integrated circuit integrated circuit integrated circuit integrated circuit integrated circuit integrated circuit v–coil v–coil n...