© 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 cs-a18ekh cu-a18ekh cs-a24ekh cu-a24ekh table of contents page page 1 safety precaution -------------------------------...
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-...
3 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. • the caution items stated ...
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. 3. Carry out drainage piping as mentioned in i...
5 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) moisture rem...
6 note • specifications are subject to change without notice for further improvement. Compressor description — rotary (1 cylinder) rolling piston type motor type — induction (2-poles) rated output kw — 1.5 air circulation description cross-flow fan propeller fan material asht-18 pp motor type transi...
7 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)...
8 note • specifications are subject to change without notice for further improvement. Air circulation description cross-flow fan propeller fan material asht-18 pp motor type transistor (8-poles) induction (6-poles) input w — 116 - 127 rated output w 30 80 fan speed low rpm cooling; 1,280 - 1,280 hea...
9 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. • long installation piping up to 25 meter. • supersonic a...
10 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.
11 5 dimensions 5.1. Indoor unit.
12 5.2. Outdoor unit.
13 6 refrigeration cycle diagram.
14 7 block diagram.
15 8 wiring connection diagram.
16 9 printed circuit board 9.1. Indoor unit (main printed circuit board).
17.
18 9.2. Indoor unit (power printed circuit board).
19 9.3. Outdoor unit (main printed circuit board).
20 9.4. Indicator panel.
21 10 installation instruction 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. • a place where drainage can be easily done. • a place where noise preventio...
22 10.1. Indoor unit 10.1.1. How to fix installation plate the mounting wall is strong and solid enough to prevent it from the vibration. The centre of installation plate should be at more than 550 mm at right and left of the wall. The distance from installation plate edge to ceiling should more tha...
23 3. For the embedded piping (this can be used for left rear piping and left bottom piping also.).
24 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 2 (c18ek, c24ek, rs/ru-c18/24ek) or 5 × 2.5 mm...
25 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 s...
26 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. 1. To purge the air, push...
27 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...
28 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,...
29 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. • when op...
30 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....
31 • 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. Rest...
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 vol...
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. Norrowing vertical airflow direction – during anti-dew condensation prevention, airflow...
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. Restart control (time delay safe...
35 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...
36 a) normal deicing time diagram (b) overload deicing time diagram.
37 11.6. Indoor fan speed control • indoor fan speed can be set using remote control. 11.6.1. Fan speed rotation chart 11.6.2. Automatic fan speed control • when set to auto fan speed, the fan speed is adjusted between maximum and minimum setting as shown in the table. - fan speed rotates in the ran...
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. For the first time the compressor operate...
39 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 • there is 2 speed for outdoor fan motor. Outdoor fan speed can b...
40 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. • when stopped with remote control, the dis...
41 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 tempe...
42 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 ...
43 (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. • manu...
44 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. • if there are more than one air conditioner unit i...
45 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” soun...
46 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. • to change the time format (24 hours & 12 hours timer display)....
47 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 f...
48 13.1.1. Relationship between the condition of the air conditioner and pressure and electric current • carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started. 13.1.2. Diagnosis methods of a malfunction of a compressor and 4-way valve...
49 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) • remove the front grille by releasing the 3 hooks a...
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 • release the hook that hold t...
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 • remove the screw at the cross flow fan. (fig. 10) reminder:- to r...
52 15 technical data 15.1. Thermostat characteristics.
53 15.2. Operation characteristics.
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61 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..
62 (note) • all parts are supplied from phaam, malaysia (vendor code: 061). • “o” marked parts are recommended to be kept in stock. Ref. No. Part name & description qty. Cs-a18ekh cs-a24ekh remarks 1 chassy complete 1 cwd50c1394 ← 2 fan motor 1 cwa981149j ← 0 3 cross flow fan complete 1 cwh02c1010 ←...
63 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..
64 (note) • all parts are supplied from phaam, malaysia (vendor code: 061). • “o” marked parts are recommended to be kept in stock. [phaam] printed in malaysia spyw0511-00 ref. No. Part name & description qty. Cu-a18ekh cu-a24ekh remarks 1 chassy ass’y 1 cwd50k2087 ← 2 compressor 1 2js324d3ab07 2js4...
