Table of Contents
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TABLE OF CONTENTS
1 Safety Precaution ------------------------------------------------ 3
2 Specifications ----------------------------------------------------- 5
2.1. CS-A18EKH CU-A18EKH ------------------------------- 5
2.2. CS-A24EKH CU-A24EKH ------------------------------- 7
3 Features ------------------------------------------------------------- 9
4 Location of Controls and Components ------------------10
4.1. Product Overview-----------------------------------------10
5 Dimensions--------------------------------------------------------11
5.1. Indoor Unit-------------------------------------------------- 11
5.2. Outdoor Unit -----------------------------------------------12
6 Refrigeration Cycle Diagram --------------------------------13
7 Block Diagram----------------------------------------------------14
8 Wiring Connection Diagram ---------------------------------15
9 Printed Circuit Board-------------------------------------------16
9.1. Indoor Unit (Main Printed Circuit Board)------------16
9.2. Indoor Unit (Power Printed Circuit Board)----------18
9.3. Outdoor Unit (Main Printed Circuit Board) ---------19
9.4. Indicator panel---------------------------------------------20
CS-A18EKH CU-A18EKH
CS-A24EKH CU-A24EKH
PAGE
10 Installation Instruction ---------------------------------------- 21
10.1. Indoor Unit ------------------------------------------------- 22
10.2. Outdoor Unit----------------------------------------------- 25
11 Operation and Control ---------------------------------------- 27
11.1. Heating Operation --------------------------------------- 27
11.2. Cooling Operation---------------------------------------- 28
11.3. Soft Dry Operation --------------------------------------- 29
11.4. Automatic Operation ------------------------------------ 30
11.5. Operation Control ---------------------------------------- 31
11.6. Indoor Fan Speed Control ----------------------------- 37
11.7. Outdoor Fan Speed Control --------------------------- 39
11.8. Vertical Airflow Direction Control --------------------- 39
11.9. Horizontal Airflow Direction Control ----------------- 40
11.10. Powerful Operation -------------------------------------- 41
11.11. Quiet Operation------------------------------------------- 42
11.12. Timer Control---------------------------------------------- 43
11.13. Random Auto Restart Control ------------------------ 44
11.14. Remote Control Signal Receiving Sound ---------- 44
© 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
Order No. MAC0511090C3
Air Conditioner
PAGE
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Summary of Contents for Panasonic CS-A18EKH
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Page 1: Table Of Contents
9.3. Outdoor Unit (Main Printed Circuit Board) ---------19 11.13. Random Auto Restart Control ------------------------ 44 9.4. Indicator panel---------------------------------------------20 11.14. Remote Control Signal Receiving Sound ---------- 44 © 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd (11969-T). All rights reserved. Unauthorized copying and distribution is a violation of law. - Page 2 11.15. Auto Refresh Deo ---------------------------------------- 44 12 Servicing Mode -------------------------------------------------- 45 12.1. Auto OFF/ON Button ------------------------------------ 45 12.2. Remote Control Button --------------------------------- 45 12.3. Test Mode Timer Table---------------------------------- 46 13 Troubleshooting Guide---------------------------------------- 47 13.1. Refrigeration Cycle System --------------------------- 47 14 Disassembly and Assembly Instructions --------------- 49 14.1.
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Page 3: Safety Precaution
1 Safety Precaution • Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing. • Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed. •... - Page 4 1. The equipment must be earthed. 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.
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Page 5: Specifications
2 Specifications 2.1. CS-A18EKH CU-A18EKH Unit CS-A18EKH CU-A18EKH Performance Test Condition NEW JIS Power Source (Phase, Voltage, Cycle) ø, V, Hz Single, 220 - 240, 50 Cooling Capacity kW (BTU/h) 5.40 (18,400) - 5.40 (18,400) Heating Capacity kW (BTU/h) 5.90 (20,100) - 6.00 (20,500) - Page 6 Unit CS-A18EKH CU-A18EKH Compressor Description — Rotary (1 cylinder) rolling piston type Motor Type — Induction (2-poles) Rated Output — Air Circulation Description Cross-flow Fan Propeller Fan Material ASHT-18 Motor Type Transistor (8-poles) Induction (6-poles) Input — 125.7 - 143.9...
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Page 7: Cs-A24Ekh Cu-A24Ekh
2.2. CS-A24EKH CU-A24EKH Unit CS-A24EKH CU-A24EKH Performance Test Condition NEW JIS Power Source (Phase, Voltage, Cycle) ø, V, Hz Single, 220 - 240, 50 Cooling Capacity kW (BTU/h) 7.03 - 7.03 (24,000 - 24,000) Heating Capacity kW (BTU/h) 7.80 - 7.80 (26,600 - 26,600) Moisture Removal l/h (Pint/h) 4.0 (8.5) - Page 8 Unit CS-A24EKH CU-A24EKH Air Circulation Description Cross-flow Fan Propeller Fan Material ASHT-18 Motor Type Transistor (8-poles) Induction (6-poles) Input — 116 - 127 Rated Output Fan Speed Low Cooling; 1,280 - 1,280 460 - 520 Heating; 1,380 - 1,380 Medium Cooling;...
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Page 9: Features
3 Features • High efficiency. • Compact design. • Wider range of horizontal discharge air. • Air Filter with function to reduce dust and smoke. • Automatic air swing and manual adjusted by Remote Control for horizontal and vertical airflow. •... -
Page 10: Location Of Controls And Components
4 Location of Controls and Components 4.1. Product Overview 4.1.1. Indoor Unit 4.1.2. Outdoor Unit 4.1.3. Remote Control... -
Page 11: Dimensions
5 Dimensions 5.1. Indoor Unit... -
Page 12: Outdoor Unit
5.2. Outdoor Unit... -
Page 13: Refrigeration Cycle Diagram
6 Refrigeration Cycle Diagram... -
Page 14: Block Diagram
7 Block Diagram... -
Page 15: Wiring Connection Diagram
8 Wiring Connection Diagram... -
Page 16: Printed Circuit Board
9 Printed Circuit Board 9.1. Indoor Unit (Main Printed Circuit Board) -
Page 18: Indoor Unit (Power Printed Circuit Board)
9.2. Indoor Unit (Power Printed Circuit Board) -
Page 19: Outdoor Unit (Main Printed Circuit Board)
9.3. Outdoor Unit (Main Printed Circuit Board) -
Page 20: Indicator Panel
9.4. Indicator panel... -
Page 21: Installation Instruction
10 Installation Instruction Indoor/Outdoor Unit Installation Diagram SELECT THE BEST LOCATION INDOOR UNIT • 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 circulation in the room is good. •... -
Page 22: Indoor Unit
10.1. Indoor Unit 10.1.1. HOW TO FIX INSTALLATION PLATE 10.1.2. TO DRILL A HOLE IN THE WALL INSTALL SLEEVE The mounting wall is strong and solid enough to prevent it from the vibration. PIPING 1. Insert the piping sleeve to the hole. 2. - Page 23 3. For the embedded piping (This can be used for left rear piping and left bottom piping also.)
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Page 24: Connect The Cable To The Indoor Unit
10.1.4. 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 3 × 2.5 mm (C18EK, C24EK, RS/RU-C18/24EK) or 5 ×... -
Page 25: Outdoor Unit
10.2. Outdoor Unit 10.2.1. INSTALL THE OUTDOOR UNIT • After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram. 1. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). 2. When installing at roof, please consider strong wind and earthquake. -
Page 26: Connect The Cable To The Outdoor Unit
<For the left pipings> 1) Measure the pressure. 2) Keep it for 5-10 minutes • Ensure if the pressure indicated on the gauge is as same as that of measured at first time. 2) Air purging The air remaining in the Refrigeration cycle which contains moisture may cause malfunction on the Compressor. -
Page 27: Operation And Control
11 Operation and Control 11.1. Heating Operation • Heating operation can be set using remote control. • This operation is applied to warm the room temperature reaches the setting temperature set on the remote control. • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to 30°C. -
Page 28: Cooling Operation
11.2. Cooling Operation • Cooling operation can be set using remote control. • This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control. • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to 30°C. -
Page 29: Soft Dry Operation
11.3. Soft Dry Operation • Soft Dry operation can be set using remote control. • Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room. • This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control. •... -
Page 30: Automatic Operation
11.4. Automatic Operation • Automatic operation can be set using remote control. • This operation starts to operate with indoor fan at SLo speed for 25 seconds to judge the intake air temperature. • After judged the temperature, the operation mode is determined by referring to the below standard. •... -
Page 31: Operation Control
• The operation mode judging temperature and standard setting temperature can be increased by 2°C permanently, by open the circuit of JX03 at printed circuit board indoor unit. 11.5. Operation Control (For 11.5.1. to 11.5.7. information applies only to Cooling and Soft Dry Operation) 11.5.1. - Page 32 11.5.4. Anti-Freezing Control • If the temperature of the indoor heat exchanger falls below 2°C continuously for 4 minutes or more, the compressor turns off. The fan speed setting remains the same. • This phenomenon is to protect the indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid form returning to the compressor.
- Page 33 b. QLo fan speed Dew formation may occurs at QLo cool, therefore QLo cool is operated only 1 hr 30 min (1 hr QLo, 30 min QLo +100 rpm). After that, it operates at QLo +180rpm (However Quiet LED remains on). 2.
- Page 34 – During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 0°, 11°, 22°, 33°, 44° to 14°, 18°, 22°, 26°, 30° under Cooling and Soft Dry operation mode. (For 11.5.8 to 11.5.14 information applies only to Heating Operation) 11.5.8.
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Page 35: Way Valve Control
11.5.11. 4-Way Valve Control • 4-way valve always on during Heating operation. (except deicing operation) • When the unit is switched off by remote control during Heating operation, the 4-way valve stay at Heating position for 5 minutes. • This is to prevent the refrigerant flow process sound for being occur. 11.5.12. - Page 36 a) Normal Deicing Time Diagram (b) Overload Deicing Time Diagram...
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Page 37: Indoor Fan Speed Control
11.6. Indoor Fan Speed Control • Indoor Fan Speed can be set using remote control. 11.6.1. Fan Speed Rotation Chart Speed CS-A24EKH CS-A18EKH Cool, Dry Heat S Hi 1650 1430 1570 1400 1480 1320 1380 1270 1280 1190 1070 S Lo... - Page 38 • Auto Fan Speed during Cooling operation: 1. Indoor fan will rotate alternately between off and on as shown in below diagram. 2. At the beginning of each compressor start operation, indoor fan will increase fan speed gradually for deodorizing purpose. 3.
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Page 39: Outdoor Fan Speed Control
11.6.3. Manual Fan Speed Control • Manual fan speed adjustment can be carried out by using the Fan Speed selection button at the remote control. • There are 3 types of fan speed settings: Lo, Me, Hi. 11.7. Outdoor Fan Speed Control •... -
Page 40: Horizontal Airflow Direction Control
11.9. Horizontal Airflow Direction Control 11.9.1. Auto Control • When the horizontal airflow direction is set to Auto using the remote control, the vanes swings left and right for Cooling and Soft Dry (0°-44°), Heating (8°-36°) as shown in the diagram. -
Page 41: Powerful Operation
11.10. Powerful Operation • The Powerful operation is to achieve the setting temperature quickly. Cooling and Soft Dry Operation condition) • When Powerful operation is set, the setting temperature will be automatically decreased 3°C internally against the present setting temperature (Lower temperature limit: 16°C). •... -
Page 42: Quiet Operation
11.11. Quiet Operation • The Quiet operation is to provide quiet cooling/heating operation condition compare to normal operation. (Cooling and Soft Dry Operation condition) • Once the Quiet Mode is set at the remote control, Quiet Mode LED illuminates. The sound level will reduce either around 2 dB(A) for Lo fan speed or 3 dB(A) for Hi/Me fan speed against the present sound level operation. -
Page 43: Timer Control
(Heating Operation condition) • When the Quiet Mode is set at the remote control, Quiet Mode LED illuminates. The sound level will reduce either around 2 dB (Lo) or 3 dB (Hi, Me), against the present sound level operation. • Quiet setting of fan speed rpm refer to Indoor Fan Speed Control. •... -
Page 44: Random Auto Restart Control
11.13. Random Auto Restart Control • If there is a power failure during operation, the air conditioner will automatically restart after 3 to 4 minutes when the power is resumed. • It will start with previous operation mode and airflow direction. •... -
Page 45: Servicing Mode
12 Servicing Mode 12.1. Auto OFF/ON Button • The “Auto OFF/ON Button” (behind the front grille) is used to operate the air conditioner if remote control is misplaced or mal- functioning. • Forced cooling operation is possible by pressing the “Auto OFF/ON Button” for more than 5s where “beep” sound is heard then release the button. -
Page 46: Test Mode Timer Table
12.2.2. CLOCK • To change the remote control's clock-hour and minute. - Press once to enter the clock setting mode. - Use timer increment button timer decrement button to change the time. - Press once again to exit the setting mode. •... -
Page 47: Troubleshooting Guide
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. The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table on the right. - Page 48 13.1.1. Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Heating Mode Condition of the air Electric current Electric current Low Pressure High Pressure Low Pressure High Pressure conditioner during operating during operating Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer...
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Page 49: Disassembly And Assembly Instructions
14 Disassembly and Assembly Instructions 14.1. Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 14.1.1. To remove the Front Grille • Remove the 3 caps and 3 screws at the bottom of the Front Grille. (Fig. 1) •... - Page 50 • Release the CN-DATA1 connector. (Fig. 5) • Release the CN-SONIC connector. (Fig. 5) • Release the CN-STM2 connector. (Fig. 5) • Release the CN-STM1 connector. (Fig. 5) • Release the CN-TH connector. (Fig. 5) Fig. 5 14.1.3. To remove the Power Electronic Controller •...
- Page 51 14.1.5. To remove the Control Board • Release the 3 screws. (Fig. 9) • By pressing down the hook at the left, you will be able to remove the Control Board. (Fig. 9) Fig. 9 14.1.6. To remove the Cross Flow Fan and Indoor Fan Motor •...
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Page 52: Technical Data
15 Technical Data 15.1. Thermostat Characteristics... -
Page 53: Operation Characteristics
15.2. Operation Characteristics... -
Page 61: Exploded View And Replacement Parts List
16 Exploded View and Replacement Parts List 16.1. Indoor Unit 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 62 REF. NO. PART NAME & DESCRIPTION QTY. CS-A18EKH CS-A24EKH REMARKS ← CHASSY COMPLETE CWD50C1394 ← FAN MOTOR CWA981149J ← CROSS FLOW FAN COMPLETE CWH02C1010 ← SCREW - CROSS FLOW FAN CWH551146 ← BEARING ASS’Y CWH64K007 EVAPORATOR CWB30C1549 CWB30C1572 ← FLARE NUT (1/4”) CWT251026 FLARE NUT (1/2”) (5/8”)
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Page 63: Outdoor Unit
16.2. Outdoor Unit 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 64 REF. NO. PART NAME & DESCRIPTION QTY. CU-A18EKH CU-A24EKH REMARKS ← CHASSY ASS’Y CWD50K2087 COMPRESSOR 2JS324D3AB07 2JS438D3JA02 ← ANTI - VIBRATION BUSHING CWH50055 ← NUT - COMPRESSOR UNIT CWH561049 ← PACKING CWB81043 CONDENSER CWB32C1376 CWB32C1377 ← SOUND PROOF BOARD ASS’Y CWH151051 ←...