Panasonic CS-A75KE Service Manual
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CONTENTS
CS-A75KE CU-A75KE
CS-A95KE CU-A95KE
CS-A125KE CU-A125KE
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2
3
6
12
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33
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66
© 2000 Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D) All rights reserved. Unauthorized copying
and distribution is a violation of law.
Order No: MAC0010049C2

Room Air Conditioner

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Summary of Contents for Panasonic CS-A75KE

  • Page 1: Table Of Contents

    Order No: MAC0010049C2 Room Air Conditioner CS-A75KE CU-A75KE CS-A95KE CU-A95KE CS-A125KE CU-A125KE CONTENTS Page Page 1 Features 12 Servicing Information 2 Functions 13 Troubleshooting Guide 3 Product Specifications 14 Technical Data 4 Dimensions 15 Exploded View 5 Refrigeration Cycle Diagram...
  • Page 2: Features

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 1 Features • High Efficiency • Deodorizing Filter • Compact Design • Quality Improvement − Gas leakage protection • Comfort Environment − Prevent compressor reverse rotation − 8 hours of sleep mode operation −...
  • Page 3: Functions

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 2 Functions Remote Control Self illuminating button OFF / ON I TEMP. Operation OFF / ON Room Temperature Setting • Temperature Setting (16°C to 30°C) • Automatic Operation MODE Operation with 2°C higher than Operation Mode Selection standard temperature.
  • Page 4: Indoor Unit

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Indoor Unit AUTO OFF / ON Automatic Operation Button Sleep Mode Auto Control • Press for < 5s to operate Automatic • Indoor Fan operates at Low speed. operation mode. • Operation stops after 8 hours. (Used when the remote control cannot be used.) Indoor Fan Speed Control •...
  • Page 5 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Outdoor Unit CU-A75KE / CU-A95KE CU-A125KE Compressor Reverse Rotation Deice Control Protection Control • To prevent frosting at outdoor heat exchanger. (Only for Heating Operation) • To protect compressor from reverse • Temperature of outdoor heat exchanger rotation when there is a instantaneous is sensed by TRS (Thermal Reed Switch).
  • Page 6: Product Specifications

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 3 Product Specifications Unit CS-A75KE CU-A75KE Cooling Capacity 2.20 - 2.10 kcal/h 1,890 - 1,810 Heating Capacity 2.45 - 2.40 kcal/h 2,110 - 2,060 Moisture Removal Pint/h Power Source Phase Single 230 - 220...
  • Page 7 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Power Cord Length — Number of core-wire 3 (1.0 mm — Dimensions Height inch (mm) 10 - 31/32 (279) 18 - 29/32 (480) Width inch (mm) 31 - 15/32 (799) 30 - 23/32 (780)
  • Page 8 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Unit CS-A95KE CU-A95KE Cooling Capacity 2.80 - 2.70 kcal/h 2,410 - 2,320 Heating Capacity 3.40 - 3.30 kcal/h 2,920 - 2,840 Moisture Removal Pint/h Power Source Phase Single 230 - 220 Cycle Airflow Method OUTLET SIDE VIEW...
  • Page 9 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Dimensions Height inch (mm) 10 - 31/32 (279) 18 - 29/32 (480) Width inch (mm) 31 - 15/32 (799) 30 - 23/32 (780) Depth inch (mm) 7 - 27/32 (199) 9 - 21/32 (245)
  • Page 10 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Unit CS-A125KE CU-A125KE Cooling Capacity 3.55 - 3.40 kcal/h 3,050 - 2,920 Heating Capacity 4.20 - 4.05 kcal/h 3,610 - 3,480 Moisture Removal Pint/h Power Source Phase Single 230 - 220 Cycle Airflow Method OUTLET SIDE VIEW...
  • Page 11 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Dimensions Height inch (mm) 10 - 31/32 (279) 21 - 1/4 (540) Width inch (mm) 31 - 15/32 (799) 27 - 17/32 (699) Depth inch (mm) 7 - 27/32 (199) 11 - 7/32 (285)
  • Page 12: Dimensions

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 4 Dimensions...
  • Page 13 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE...
  • Page 14: Refrigeration Cycle Diagram

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 5 Refrigeration Cycle Diagram...
  • Page 15: Block Diagram

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 6 Block Diagram...
  • Page 16: Wiring Diagram

    REMARKS : BLUE : BROWN : BLACK : WHITE : RED : ORANGE : PINK : YELLOW/GREEN Resistance of Indoor Fan Motor Windings MODEL CS-A75KE CS-A95KE CS-A125KE CONNECTION CWA921033 CWA921032 CWA921031 707.1 Ω 451.2 Ω 450.7 Ω YELLOW-BLUE 71.1 Ω...
  • Page 17: Operation Details

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8 Operation Details 8.1. Cooling Mode Operation Cooling in operation according to Remote Control setting. Time Delay Safety Control (3 minutes) • When the compressor is stopped by Remote Control, it restarts after 3 minutes when it is turned ON by Remote Control.
  • Page 18 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Compressor Protection Control • After the compressor starts for 50 seconds but the outdoor fan motor is still OFF, the compressor will stop and restart automatically. (Time Delay Safety Control is valid). •...
  • Page 19 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Cooling Operation Time Diagram...
  • Page 20: Soft Dry Mode Operation

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.2. 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 at low speed. •...
  • Page 21 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Soft Dry Operation Time Diagram...
  • Page 22: Heating Mode Operation

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.3. Heating Mode Operation Heating in operation according to Remote Control setting. Time Delay Safety Control • When the compressor is stopped by Remote Control, it restarts after 3 minutes when the Remote Control is turned ON. •...
  • Page 23 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Hot Start Control When Heating operation starts, Indoor Fan will not start until the indoor heat exchanger reaches 30°C as diagram shown. Hot Start is completed when indoor heat exchanger rises to 39°C.
  • Page 24 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Automatic Fan Speed Mode When Automatic Fan Speed is selected at Remote Control during heating operation. • Fan speed rotates in the range of Me → Lo according to the heat exchanger temperature. •...
  • Page 25 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Deicing Control Deice starts to prevent frosting at outdoor heat exchanger. • Normal Deicing Deice operations detection commences after 30 minutes of Heating operation starts or 60 minutes after previous deice operation. If the TRS (Thermal Reed Switch) senses the outdoor piping temperature drops to -3°C (TRS CLOSE) or less for 50 sec.
  • Page 26 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Normal Deicing Time Diagram Overload Deicing Time Diagram...
  • Page 27: Automatic Mode Operation

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.4. Automatic Mode Operation 1. When the Automatic Mode Operation is selected, the indoor fan operates at Lo fan speed for 25 seconds to sense intake air temperature and determine the 1st operation mode.
  • Page 28: Random Auto Restart Control

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.5. Sleep Mode Auto Operation Cooling or Soft Dry Operation When you press the SLEEP Mode, the following movement will start to avoid overcooling. • The fan speed refer to Indoor Fan Motor Control. •...
  • Page 29: Indoor Fan Speed Control

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.9. Indoor Fan Speed Control Auto Fan Speed Control When set to Auto Fan Speed, the fan speed is shifted automatically between Stop to SHi depend on each operation as shown below.
  • Page 30: Airflow Direction Control

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.10. Airflow Direction Control 1. Vertical Airflow Direction Cooling and Soft Dry Mode • The louver swings up and down as shown above. • The louver can be selected between 14° - 36° (as •...
  • Page 31: Economy Mode Operation

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.11. Economy Mode Operation Purpose of this operation is to save or reduced electrical power consumption of the room air conditioner. However consumer is advised to use Economy Mode operation after the room temperature reaches the desired temperature.
  • Page 32: Powerful Mode Operation

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 8.12. Powerful Mode Operation Purpose of this operation is to be obtain the setting temperature quickly. 1. Cooling and Soft Dry Mode • When the Powerful Mode is set, the set temperature will be automatically decreased 3°C against the present setting temperature.
  • Page 33: Operating Instructions

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 9 Operating Instructions SAFETY PRECAUTIONS Before operating, please read the following “Safety Precautions” carefully. To prevent personal injury, injury to others and property damage, the following instructions must be followed. Incorrect operation due to failure to follow instructions will cause harm or damage, the seriousness of which is...
  • Page 34: Operation Precautions

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Operation Precautions Do not insert plug to operate the unit. Warning Do not pull out plug to stop the unit. This sign warns of death or serious injury. Plug in properly. Do not share outlet. Do not operate with wet hands.
  • Page 35 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Switch off the power supply if the unit is Caution not used for a long period. This sign warns of injury. Do not pull the cord to disconnect the plug. Switch off the power supply before cleaning it.
  • Page 36: Name Of Each Part

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE NAME OF EACH PART Indoor Unit Air Intake Vent Front Panel Power Supply Cord Panel Opener Signal Receptor Horizontal Airflow Direction Air Outlet Vent Louver (Manually adjusted) Operation Indicators Vertical Airflow Direction Louver POWER : Green SLEEP...
  • Page 37: Outdoor Unit

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Outdoor Unit Air Intake Vents Connecting cable (Rear) (Side) Drain Hose Piping Air Outlet Vents Ground Terminal (Inside Cover) Accessories Remote Control Remote Control Holder Remote Control Indication Sticker Two RO3 dry-cell batteries or...
  • Page 38: Remote Control

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Remote Control Operation Display Signal Transmitter OFF/ON Button (Self-illuminating Button) Room Temperature Setting Button (Self-illuminating Button) Powerful Mode Operation Button When the remote control cover is opened Operation Display Operation Mode Selection Button Clock Button Fan Speed Selection Button Economy Mode...
  • Page 39: How To Use The Remote Control

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE How to use the remote control Notes • Do not throw or drop • Do not get it wet • Certain type of flourescent lamps may affect signal reception. Consult your dealer.
  • Page 40: Preparation Before Operation

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE PREPARATION BEFORE OPERATION Indoor Unit Warning Ensure the power plug is securely inserted. A loose plug may cause a fire or an electric shock. Connect the power supply cord to an independent power supply.
  • Page 41: Setting The Clock

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Remote Control Inserting batteries OPEN Slide the cover to open Be sure the directions are correct • Open the remote control cover and confirm the display 12:00 PM is flashing. Set the current time (Clock) immediately to prevent battery exhaustion.
  • Page 42: How To Operate

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE HOW TO OPERATE Automatic, Cooling, Soft Dry, Fan Press to select the desired operation mode Display When pressed, the display changes in this order. COOL Close the Cover Press to start the operation POWER indicator LED (Green) on indoor unit will light up.
  • Page 43 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Adjusting Airflow Direction And Fan Speed Press to select Fan speed • The display changes in this order Automatic Medium High Selecting Vertical Airflow Direction Press AUTO, Selecting Vertical Airflow Direction Press AUTO, •...
  • Page 44: Setting The Timer

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE SETTING THE TIMER Ensure that the current time is correct before setting the timer. The timer cannot be set if the time display is flashing. Press ON-TIMER Flashes → Set the ON-TIMER to 7:00AM Press to set the time Increase by 10 minutes Decrease by 10 minutes...
  • Page 45 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Recommended Setting of Timer When you sleep • Set the time at which you will go to sleep with the OFF- TIMER. This prevent wastage of electricity. When you wake up •...
  • Page 46: Convenience Operation

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE CONVENIENCE OPERATION Sleep Mode This is to obtain a comfortable room temperature while sleeping. To set the sleep mode, press SLEEP. * The sleep indicator on the indoor unit will light up. To cancel the sleep mode, press once more.
  • Page 47 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Economy or Powerful Mode Economy and Powerful operation cannot be selected simultaneously. Economy Mode To save electrical power consumption. However, please use this mode when the room have reached your desired temperature.
  • Page 48: Care And Maintenance

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE CARE AND MAINTENANCE Cleaning the Indoor Unit and Remote Control • Wipe gently with a soft, dry cloth. • Do not clean with water hotter than 40°C or with polishing fluids. Caution •...
  • Page 49: Cleaning The Front Panel

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Cleaning the Front Panel (Must be removed before washing) Caution • Stand on a level surface when • Do not touch the metal parts in • Do not leave water on the removing the front panel.
  • Page 50 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Replacing the Air Purifying Filters (Once every 3 month) • Do not reuse dirty filters. Consult the nearest authorized dealer. (Air Purifying filter No. CZ-SFD50N) • These filters function effectively for not more than three months. •...
  • Page 51 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Pre-season Inspection • Is the discharge air cold (warm)? Operation is normal if, 15 minutes after the start of operation, the temperature difference between the air intake and outlet vents is 8°C or above for cooling and 14°C...
  • Page 52: Troubleshooting

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE TROUBLESHOOTING Normal Operation - Is it okay? - This is the answer. - Air conditioner has been restarted, but does not operate for 3 minutes. - A sound like water flowing can - This is to protect the air conditioner.
  • Page 53: Abnormal Operation

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Abnormal Operation Hmmm! The air conditioner does not operate. Air conditioner operation noise too loud. • Has a circuit breaker been tripped? • Is the installation work slanted? • Has the power plug been removed •...
  • Page 54: Helpful Information

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE HELPFUL INFORMATION Auto Operation Button Automatic Operation • If the remote control fails to function or misplaced, press Auto Operation button for Automatic operation. • The Automatic operation will be activated immediately once the Auto operation button is pressed.
  • Page 55: Energy Saving And Operation Hints

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE ENERGY SAVING AND OPERATION HINTS Air Filter and Air Purifying Filter Clean the air filter every 2 weeks and change the Air Purifying Filter every 3 Setting Temperature months. Dirty filter may reduces cooling Set the temperature 1°C higher...
  • Page 56 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Warning 1) This appliance must be earthed. 2) If the supply cord is damaged or need to be replaced, it must be replaced by the manufacturer or its service agent or a similarly qualified person in order to avoid a hazard. 3) Remove power plug or disconnect from the mains before servicing this appliance.
  • Page 57: Installation Instructions

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 10 Installation Instructions Required tools for Installation Works 1. Phillips screw driver 5. Spanner 9. Gas leak detector 13. Multimeter 2. Level gauge 6. Pipe cutter 10. Measuring tape 14. Torque wrench 18 N.m (1.8 kgf.m)
  • Page 58 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 1. Grounding is necessary. It may cause electrical shock if grounding is not perfect. 2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fire.
  • Page 59 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE Attached accessories Indoor/Outdoor unit installation diagram Applicable piping kit CZ-3F5, 7AEN (CS/CA75KE, A95KE) CZ-4F5, 7, 10AN (CS/CA125KE) SELECT THE BEST LOCATION INDOOR UNIT • There should not be any heat source or steam near the unit.
  • Page 60: Select The Best Location

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 10.2. INDOOR UNIT 10.2.1. SELECT THE BEST LOCATION 10.2.3. TO DRILL A HOLE IN THE WALL (Refer to “Select the best location” AND INSTALL A SLEEVE OF section) PIPING 1. Insert the piping sleeve to the hole. 10.2.2.
  • Page 61 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 3. For the embedded piping (This can be used for left rear piping and left bottom piping also.)
  • Page 62 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 10.2.5. CONNECT THE CABLE TO THE INDOOR UNIT 1. The inside and outside connecting cable can be connected without removing the front grille. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 5 ×...
  • Page 63: Install The Outdoor Unit

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE HOW TO TAKE OUT FRONT GRILLE 10.3. OUTDOOR UNIT Please follow below steps to take out front grille if necessary 10.3.1. SELECT THE BEST LOCATION such as when servicing. (Refer to “Select the best location”...
  • Page 64: Evacuation Of The Equipment

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE CUTTING AND FLARING THE PIPING 5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve. 1. Please cut using pipe cutter and then remove the burrs. 6.
  • Page 65 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE DISPOSAL OF OUTDOOR UNIT DRAIN WATER CHECK ITEMS • If a drain elbow is used, the unit should be placed on a Is there any gas leakage at flare nut connections? stand which is taller than 3 cm.
  • Page 66: 11 2-Way, 3-Way Valve

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 11 2-way, 3-way Valve 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Works Shaft Position Shaft Position Service Port Shipping Close Closed Closed (With valve cap) (With valve cap) (With cap) Evacuation Closed Closed Open...
  • Page 67: Evacuation Of Installation

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 11.1. Evacuation of Installation WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO If air remain in the indoor unit and refrigeration pipes, it will EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES affect the compressor, reduce to cooling capacity, and could in the following procedure.
  • Page 68: Pumping Down

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 11.2. Pumping down Procedure: 1. Confirm that both the 2-way and 3-way valves are set to 6. Operate the air conditioner at the cooling cycle and the opened position. stop it when the gauge indicates 0 MPa (0 kg/cm •...
  • Page 69 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 11.3. Evacuation of Re-installation WHEN REINSTALLING AN AIR CONDITIONER, BE SURE TO If air remain in the indoor unit and refrigeration pipes, it will EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES affect the compressor, reduce to cooling capacity, and could in the following procedure.
  • Page 70 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 11.4. Balance refrigerant of the 2-way, 3-way valves (Lack of refrigerant in the refrigeration cycle) Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the open position. 2. Connect the charge set to the 3-way valve’s service port.
  • Page 71 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 11.5. 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 72: Gas Charging

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 11.6. Gas charging (After Evacuation) Procedure: 1. Connect the charge hose to the charging cylinder. This is different from previous procedures. Because you are • Connect the charge hose which you disconnected from charging with liquid refrigerant from the gas side, absolutely do the vacuum pump to the valve at the bottom of the no attempt to charge with large amount of liquid refrigerant...
  • Page 73: Servicing Information

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 12 Servicing Information • Inspection points for the Indoor Electronic Controller 1. The Electronic Controller, a signal Receiver and an Indicator (Fig. 2) can be seen by the below steps: − Remove the 2 caps and 2 screws at the bottom of the front grille.
  • Page 74 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE − Finally remove the fan motor by removing the screw. (Fig. 5) − REMINDER - To reinstall the fan motor, adjust the connector of the fan motor as Fig. 5. Fig. 5 •...
  • Page 75 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE • Remote Control Reset 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 happen, remove the back cover of the remote control and you will find a resetting terminal, and by shorting it with a minus screwdriver, it will return to normal.
  • Page 76: Troubleshooting Guide

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 13 Troubleshooting Guide 13.1. Refrigeration cycle system In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan.
  • Page 77 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 13.1.1. Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Heating Mode Condition of the air conditoner Low Pressure High Pressure Electric current Low Pressure High Pressure...
  • Page 78: Technical Data

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 14 Technical Data...
  • Page 79 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 230V Outdoor Temp. (°C) Indoor wet bulb temp. 17.0°C 2.18 1.65 0.64 2.04 1.59 0.69 1.90 1.52 0.74 1.72 1.45 0.80 19.0°C 2.20 0.70 19.5°C 2.40 1.73 0.65 2.24 1.66 0.70 2.08 1.60...
  • Page 80 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE...
  • Page 81 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE...
  • Page 82 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE...
  • Page 83: Exploded View

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 15 Exploded View Note: The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 84: Replacement Parts List

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 16 Replacement Parts List <Model: CS-A75KE / CS-A95KE / CS-A125KE> DESCRIPTION & NAME Q’TY CS-A75KE CS-A95KE CS-A125KE REMARKS ← ← CHASSY COMPLETE CWD50C338 ← ← PARTICULAR PIECE CWD931019 FAN MOTOR CWA921033 CWA921032 CWA921031 ←...
  • Page 85: Exploded View

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 17 Exploded View Note: The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 86: Replacement Parts List

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 18 Replacement Parts List <Model: CU-A75KE / CU-A95KE> DESCRIPTION & NAME Q’TY CU-A75KE CU-A95KE REMARKS CHASSY ASS’Y CWD50K2037A CWD50K2038A ← FAN MOTOR BRACKET CWD54113 ← SCREW - FAN MOTOR BRACKET CWH4580399 ← FAN MOTOR CWA95245 ←...
  • Page 87: Exploded View

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 19 Exploded View Note: The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 88: Replacement Parts List

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 20 Replacement Parts List <Model: CU-A125KE> DESCRIPTION & NAME Q’TY CU-A125KE REMARKS CHASSY ASS’Y CWD50K659A FAN MOTOR BRACKET CWD54254 SCREW - FAN MOTOR BRACKET CWH55189 FAN MOTOR CWA95381 SCREW - FAN MOTOR MOUNT CWH55406 COMPRESSOR 2KS224D5CA02...
  • Page 89: Electronic Parts List

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 21 Electronic Parts List <Electronic Controller Part No.: CWA742320, CWA742327, CWA742313> SYMBOL DESCRIPTION & NAME PART NO. SOUND GENERATOR A48040 TRANSFORMER A40322 D1, D4 DIODE A541SR154-4 DIODE A54RB501V-40 DIODE A541SS355T DIODE A54CS1VB20E...
  • Page 90: Electronic Circuit Diagram

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 22 Electronic Circuit Diagram • CS-A75KE / CU-A75KE • CS-A95KE / CU-A95KE • CS-A125KE / CU-A125KE SCHEMATIC DIAGRAM 1/3 MAIN RECEIVER (PH3) PH302C CN-RCV VCC1 5.1k RY-PWR DRIVE RY-PWR 2SD148-4X 0.01µ 0.01µ...
  • Page 91 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE SCHEMATIC DIAGRAM 2/3 4.7k 4.7k A55DC143XKTX RELAY DRIVE 4.7k A55DC143XKTX RELAY DRIVE A55DC143XKTX RELAY DRIVE SSR1 TIMER STEPPING MOTOR SHORTEN DRIVE SIGNAL AUTO OPERATION TEST RUN RELAY DRIVE SIGNAL REMOTE CON SOUND...
  • Page 92 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE SCHEMATIC DIAGRAM 3/3 AC 220-230V 50/60Hz SINGLE PHASE TEMPERATURE FUSE 102 C 4.7k CN-FUSE2 CN-FUSE1 (RED) (BLU) (WHT) 55DC143XKTX LAY DRIVE CWA40322 RY-HOT ZNR2 CWA00161 ERZ-TCEAK471 RY-SHI RY-H RY-PWR TERMINAL RY-M SSR2 SSR1 FUSE RY-HOT...
  • Page 93 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE...
  • Page 94 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE How to use electronic circuit diagram TIMER TABLE Test mode Name Time (When test point Remarks Short-circuited) Sleep Mode Waiting 1 hr. 6 sec. Sleep Mode Operation 8 hrs. 48 sec. Real Timer 1 hr.
  • Page 95 CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 22.1. REMOTE CONTROL...
  • Page 96: Print Pattern Indoor Unit Printed Circuit Board

    S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 22.2. PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT BOARD TOP VIEW...
  • Page 97: Print Pattern

    CS-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE 22.3. PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT BOARD BOTTOM VIEW...
  • Page 98 S-A75KE CU-A75KE / CS-A95KE CU-A95KE / CS-A125KE CU-A125KE [MACC] Printed in Malaysia...

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