© panasonic appliances air-conditioning (m) sdn. Bhd. 2012. Unauthorized copying and distribution is a violation of law. Order no: papamy1204088ce indoor unit outdoor unit cs-e18nkua cs-e24nkua cu-e18nkua cu-e24nkua table of contents 1. Safety precautions................................................
2 12.2 indoor fan motor operation .......................31 12.3 outdoor fan motor operation ....................32 12.4 airflow direction..........................................32 12.5 quiet operation (cooling mode/cooling area of dry mode)...............................................33 12.6 qu...
3 caution warning warning 1. Safety precautions 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. ...
4 caution 19. During installation, install the refrigerant piping properly before run the compressor. (operation of compressor without fixing refrigeration piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury e...
5 2. Specification indoor cs-e18nkua cs-e24nkua model outdoor cu-e18nkua cu-e24nkua performance test condition ari ari phase, hz single, 60 single, 60 power supply v 208 230 208 230 min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Kw 1.70 5.01 5.80 1.70 5.01 5.80 1.70 7.02 8.00 1.70 7.02 ...
6 type propeller propeller material pp pp motor type dc motor (8 poles) dc motor (8 poles) input power w - - output power w 60 60 outdoo r fa n speed hi rpm cooling: 700 heating: 700 cooling: 700 heating: 750 moisture removal l/h (pt/h) 1.4 (3.0) 3.6 (7.6) qlo m 3 /min (ft 3 /min) cooling : 11.74 (4...
7 dry bulb wet bulb dry bulb wet bulb maximum 89.6 73.4 89.6 73.4 indoor operation range (cooling) minimum 60.8 51.8 60.8 51.8 maximum 109.4 78.8 109.4 78.8 outdoor operation range (cooling) minimum 0.0 - 0.0 - maximum 86.0 - 86.0 - indoor operation range (heating) minimum 60.8 - 60.8 - maximum 75.2...
8 3. Features inverter technology o wider output power range o energy saving o quick cooling o more precise temperature control environment protection o non-ozone depletion substances refrigerant (r410a) long installation piping o long piping up to 100 foot easy to use remote control quali...
9 4. Location of controls and components 4.1 indoor unit 4.2 outdoor unit 4.3 remote control.
10 5. Dimensions 5.1 indoor unit.
11 5.2 outdoor unit.
12 6. Refrigeration cycle diagram.
13 7. Block diagram.
14 8. Wiring connection diagram 8.1 indoor unit.
15 8.2 outdoor unit.
16 9. Electronic circuit diagram 9.1 indoor unit.
17 9.2 outdoor unit.
18 10. Printed circuit board 10.1 indoor unit 10.1.1 main printed circuit board.
19 10.1.2 power printed circuit board 10.1.3 indicator and receiver printed circuit board.
20 10.2 outdoor unit 10.2.1 main printed circuit board.
21 10.2.2 noise filter printed circuit board.
22 11. Installation instruction 11.1 select the best location 11.1.1 indoor unit do not install the unit in excessive oil fume area such as kitchens, workshops and etc. there should not be any heat source or steam near the unit. there should not be any obstacles blocking the air circulation. ...
23 11.3 indoor unit 11.3.1 how to fix installation plate the mounting wall must be strong and solid enough to prevent it from the vibration. The center of installation plate should be at more than c at right and left of the wall. The distance from installation plate edge to ceiling should more than ...
24 11.3.3 indoor unit installation 11.3.4 for the right rear piping 11.3.5 for the right bottom piping 11.3.6 for the embedded piping (this can be used for left rear piping and bottom piping also.).
25 11.3.7 connect the cable to the indoor unit 1. The inside and outside connecting cable can be connected without removing the front grille. 2. Unscrew the conduit cover and fix the conduit connector to conduit cover with lock nut, then secure it against chassis. 3. Connecting wire between indoor u...
26 11.3.8 wiring stripping and connecting requirement 11.3.9 cutting and flaring the piping 1 please cut using pipe cutter and then remove the burrs. 2 remove the burrs by using reamer. If burrs are not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering t...
27 11.4 outdoor unit 11.4.1 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 (ø13/32"). 2 when installing at roof, please consider stro...
28 11.4.3 evacuation of the equipment when installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedures. 1. Connect a charging hose with a push pin to the low side of a charging set and the service port of the 3-way valve. 2. Connect the mic...
29 9. Secure the wire onto the control board with the holder (clamper). 10. After completing wiring connections, reattach the particular plate control board cover (metal and resin) and the original position with the screws. 11. For wire stripping and connection requirement, refer to instruction 11.3...
30 12. Operation control 12.1 basic function inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintai...
31 12.1.5 automatic operation this mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode and indoor intake air temperature. during operation mode judgment, indoor fan motor (with speed of lo-) is running for 30 seco...
32 [heating] o according to indoor pipe temperature, automatic heating fan speed is determined as follows. feedback control o immediately after the fan motor started, feedback control is performed once every second. O during fan motor on, if fan motor feedback ≥ 2550 rpm or error counter increase,...
33 manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions of the vane are as figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close position. 12.4.2 horizontal airflow automat...
34 during quiet operation, if on timer activates, quiet operation maintains. After off, when on back, quiet operation is not memorised. control contents o auto fan speed is change from normal setting to quiet setting of respective fan speed. This is to reduce sound of hi, me, lo for 3db. O manual ...
35 12.8 timer control 12.8.1 on timer control on timer can be set using remote control, where the unit with timer set will start operation earlier than the setting time. This is to provide a comfortable environment when reaching the set on time. 60 minutes before the set on time, indoor (at fan ...
36 13. Protection control 13.1 protection control for all operations 13.1.1 restart control (time delay safety control) the compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by pressing off/on button at remote control within this per...
37 13.1.5 compressor overheating prevention control instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency are as below. if compressor discharge temperature exceeds 233.6°f, compressor will be stopped, occurs 4 times per 20 m...
38 13.2.2 cooling overload control pipe temperature limitation / restriction. O detects the outdoor pipe temperature and carry out restriction / limitation below (limit the compressor operation frequency) o the compressor stops if outdoor pipe temperature exceeds 145.4°f. O if the compressor stops...
39 13.2.6.3 overload protection control the compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown below. if the heat exchanger temperature exceeds 140.0°f, compressor will stop. 13.2.6.4 low temperature compressor oil return control in heating ...
40 14. Servicing mode 14.1 auto off/on button 1 auto operation mode the auto operation will be activated immediately once the auto off/on button is pressed. This operation can be used to operate air conditioner with limited function if remote control is misplaced or malfunction. 2 test run operation...
41 press auto off/on button to toggle remote control receiving sound. - short “beep”: turn off remote control receiving sound. - long “beep”: turn on remote control receiving sound. After auto off/on button is pressed, the 20 seconds counter for remote control receiving sound off/on mode is restarte...
42 15. Troubleshooting guide 15.1 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...
43 15.1.1 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..
44 15.2 breakdown self diagnosis function 15.2.1 self diagnosis function (three digits alphanumeric code) once error occurred during operation, the unit will stop its operation, and timer led blinks. although timer led goes off when power supply is turned off, if the unit is operated under a bre...
45 15.3 error code table.
46 note: “○” – frequency measured and fan speed fixed the memory data of error code is erased when the power supply is cut off, or press the auto switch until “beep” sound heard following by pressing the check button at remote control. Although operation forced to stop when abnormality detected, eme...
47 15.4 self-diagnosis method 15.4.1 h11 (indoor/outdoor abnormal communication) malfunction decision conditions during startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction caused faulty ...
48 15.4.2 h14 (indoor intake air temperature sensor abnormality) malfunction decision conditions during startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors. Malfunction caused faulty connector con...
49 15.4.3 h16 (outdoor current transformer open circuit) malfunction decision conditions a current transformer (ct) is detected by checking the compressor running frequency (≥ rated frequency) and ct detected input current (less than 0.65a) for continuously 20 seconds. Malfunction caused ct defe...
50 15.4.4 h19 (indoor fan motor – dc motor mechanism locked) malfunction decision conditions the rotation speed detected by the hall ic during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or malfunction caused operation stops due to short circuit in...
51 15.4.5 h23 (indoor pipe temperature sensor abnormality) malfunction decision conditions during startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction caused faulty connector conne...
52 15.4.6 h27 (outdoor air temperature sensor abnormality) malfunction decision conditions during startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors. Malfunction caused faulty connector connection. f...
53 15.4.7 h28 (outdoor pipe temperature sensor abnormality) malfunction decision conditions during startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors. Malfunction caused faulty connector connection. ...
54 15.4.8 h30 (compressor discharge temperature sensor abnormality) malfunction decision conditions during startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors. Malfunction caused faulty conne...
55 15.4.9 h33 (unspecified voltage between indoor and outdoor) malfunction decision conditions the supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction caused wrong models interconnected. wrong indoor unit and outdoor unit pcbs used. indoor unit or out...
56 15.4.10 h98 (indoor high pressure protection) error code will not display (no timer led blinking) but store in eeprom malfunction decision conditions during heating operation, the temperature detected by the indoor pipe temperature sensor is above 140.0°f. Malfunction caused clogged air filte...
57 15.4.11 h99 (indoor freeze prevention protection: cooling or soft dry) malfunction decision conditions freeze prevention control takes place (when indoor pipe temperature is lower than 35.6°f) malfunction caused clogged air filter of the indoor unit dust accumulation on the indoor unit heat...
58 15.4.12 f11 (indoor pipe temperature sensor abnormality) malfunction decision conditions when cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above 113.0°f. Malfunction caused faulty connector connection. faulty indoor pipe temperature sensor. ...
59 15.4.13 f90 (power factor correction protection) malfunction decision conditions during startup and operation of cooling and heating, when power factor correction (pfc) protection circuitry at the outdoor unit main pcb senses abnormal high dc voltage level. Malfunction caused dc voltage peak ...
60 15.4.14 f91 (refrigeration cycle abnormality) malfunction decision conditions during cooling, compressor frequency = fcmax. during cooling and heating operation, running current: 0.65a during cooling, indoor intake - indoor pipe malfunction caused refrigerant shortage (refrigerant leakage...
61 15.4.15 f93 (compressor rotation failure) malfunction decision conditions a compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction caused compressor terminal disconnect outdoor pcb malfunction troubleshooting.
62 15.4.16 f95 (cooling high pressure abnormality) malfunction decision conditions during operation of cooling, when outdoor unit heat exchanger high temperature data (141.8°f) is detected by the outdoor pipe temperature sensor. Malfunction caused outdoor pipe temperature rise due to short circuit...
63 15.4.17 f96 (ipm overheating) malfunction decision conditions during operating of cooling and heating, when ipm temperature data (212.0°f) is detected by the ipm temperature sensor. Malfunction caused ipm overheats due to short circuit of hot discharge air flow. ipm overheats due to defective...
64 15.4.18 f97 (compressor overheating) malfunction decision conditions during operation of cooling and heating, when compressor tank temperature data (233.6°f) is detected by the compressor tank temperature sensor. Malfunction caused refrigerant shortage (refrigerant leakage). 2/3 way valve clo...
65 15.4.19 f98 (input over current detection) malfunction decision conditions during cooling and heating operation, when an input over-current (16.8a) is detected by checking the input current value being detected by current transformer (ct) with the compressor running. Malfunction caused over-cur...
66 15.4.20 f99 (output over current detection) malfunction decision conditions during operation of cooling and heating, when an output over-current (18.5a) is detected by checking the current that flows in the inverter dc peak sensing circuitry. Malfunction caused dc peak due to compressor failure...
67 warning 16. Disassembly and assembly instructions high voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 16.1 indoor electronic c...
68 16.1.1.2 to remove discharge grille.
69 16.1.1.3 to remove control board 16.1.1.4 to remove cross flow fan and indoor fan motor.
70
71 17. Technical data 17.1 operation characteristics 17.1.1 cs-e18nk cu-e18nk cooling characteristic o room temperature: 81°f (dbt), 66°f (wbt) o operation condition: high fan speed o piping length: 24.6ft o compressor frequency : fc 57.000 58.000 59.000 60.000 61.000 62.000 63.000 60 65 70 75 80 ...
72 piping length characteristic cooling o room temperature: 81°f (dbt), 66°f (wbt) o operation condition: high fan speed o outdoor temperature: 95°f (dbt) o compressor frequency : fc 4.400 4.500 4.600 4.700 4.800 4.900 5.000 5.100 9 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 piping ...
73 heating characteristic o room temperature: 68°f (dbt) o operation condition: high fan speed o piping length: 24.6ft o compressor frequency : fh 90.000 95.000 100.000 105.000 110.000 115.000 120.000 125.000 14 19 24 29 34 39 44 49 54 59 64 69 74 79 outdoor air temperature (°f) o utl et a ir t em...
74 piping length characteristic heating o room temperature: 68°f (dbt) o operation condition: high fan speed o outdoor temperature: 47°f (dbt), 43°f (wbt) o compressor frequency : fh 4.600 4.800 5.000 5.200 5.400 5.600 5.800 6.000 6.200 9 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 p...
75 17.1.2 cs-e24nk cu-e24nk cooling characteristic o room temperature: 81°f (dbt), 66°f (wbt) o operation condition: high fan speed o piping length: 24.6ft o compressor frequency : fc 50.000 51.000 52.000 53.000 54.000 55.000 56.000 60 65 70 75 80 85 90 95 100 105 110 115 outdoor air temperature (...
76 piping length characteristic cooling o room temperature: 81°f (dbt), 66°f (wbt) o operation condition: high fan speed o outdoor temperature: 95°f (dbt) o compressor frequency : fc 6.900 6.950 7.000 7.050 7.100 7.150 7.200 9 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 piping length...
77 heating characteristic o room temperature: 68°f (dbt) o operation condition: high fan speed o piping length: 24.6ft o compressor frequency : fh 93.000 98.000 103.000 108.000 113.000 118.000 123.000 128.000 133.000 138.000 14 19 24 29 34 39 44 49 54 59 64 69 74 79 outdoor air temperature (°f) o ...
78 piping length characteristic heating o room temperature: 68°f (dbt) o operation condition: high fan speed o outdoor temperature: 47°f (dbt), 43°f (wbt) o compressor frequency : fh 6.500 7.000 7.500 8.000 8.500 9.000 9 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 piping length (ft) ...
79 18. Exploded view and replacement parts list 18.1 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..
80 ref. No. Part name & description qty. Cs-e18nkua cs-e24nkua remark 1 chassis complete 1 cwd50c1637 ← 2 fan motor 1 arw7663ac ← o 3 cross flow fan complete 1 cwh02c1077 ← 4 bearing ass’y 1 cwh64k007 ← 5 screw - cross flow fan 1 cwh551146 ← 7 evaporator 1 cwb30c3963 cwb30c3967 8 flare nut (liquid) ...
81 18.2 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..
82 ref. No. Part name & description qty. Cu-e18nkua cu-e24nkua remark 1 chassis ass’y 1 cwd52k1228a ← 2 anti-vibration bushing 3 cwh50055 ← 3 compressor 1 5kd240xaf21 ← o 4 nut-compressor mount 3 cwh561049 ← 5 fan motor bracket 1 cwd541127 ← 6 fan motor 1 ehds80cac ← o 7 screw - fan motor bracket 3 ...
