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Panasonic CS-E18NKUA Service Manual - page 73
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
emp
er
at
ur
e (
°F
)
208
230
3.400
3.900
4.400
4.900
5.400
5.900
6.400
6.900
7.400
7.900
14
19
24
29
34
39
44
49
54
59
64
69
74
79
Outdoor Air Temperature (°F)
He
at
in
g
Ca
pa
ci
ty
(
kW
)
6.400
6.900
7.400
7.900
8.400
8.900
9.400
9.900
14
19
24
29
34
39
44
49
54
59
64
69
74
79
Outdoor Air Temperature (°F)
C
urre
nt
(A
)
52.000
62.000
72.000
82.000
92.000
102.000
112.000
122.000
132.000
142.000
152.000
162.000
172.000
14
19
24
29
34
39
44
49
54
59
64
69
74
79
Outdoor Air Temperature (°F)
G
as
Si
de
Pi
pi
ng
P
re
ss
ure
(P
S
I)
Summary of CS-E18NKUA
Page 1
© 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................................................
Page 2
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...
Page 3: 1. Safety Precautions
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. ...
Page 4
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...
Page 5: 2. Specification
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 ...
Page 6
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...
Page 7
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...
Page 8: 3. Features
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...
Page 9
9 4. Location of controls and components 4.1 indoor unit 4.2 outdoor unit 4.3 remote control.
Page 10: 5. Dimensions
10 5. Dimensions 5.1 indoor unit.
Page 11
11 5.2 outdoor unit.
Page 12
12 6. Refrigeration cycle diagram.
Page 13: 7. Block Diagram
13 7. Block diagram.
Page 14
14 8. Wiring connection diagram 8.1 indoor unit.
Page 15
15 8.2 outdoor unit.
Page 16
16 9. Electronic circuit diagram 9.1 indoor unit.
Page 17
17 9.2 outdoor unit.
Page 18: 10. Printed Circuit Board
18 10. Printed circuit board 10.1 indoor unit 10.1.1 main printed circuit board.
Page 19
19 10.1.2 power printed circuit board 10.1.3 indicator and receiver printed circuit board.
Page 20
20 10.2 outdoor unit 10.2.1 main printed circuit board.
Page 21
21 10.2.2 noise filter printed circuit board.
Page 22: 11. Installation
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. ...
Page 23
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 ...
Page 24
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.).
Page 25
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...
Page 26
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...
Page 27
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...
Page 28
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...
Page 29
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...
Page 30: 12. Operation
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...
Page 31
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...
Page 32
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,...
Page 33
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...
Page 34
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 ...
Page 35
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 ...
Page 36: 13. Protection
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...
Page 37
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...
Page 38
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...
Page 39
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 ...
Page 40: 14. Servicing
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...
Page 41
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...
Page 42: 15. Troubleshooting
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...
Page 43
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..
Page 44
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...
Page 45
45 15.3 error code table.
Page 46
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...
Page 47
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 ...
Page 48
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...
Page 49
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...
Page 50
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...
Page 51
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...
Page 52
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...
Page 53
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. ...
Page 54
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...
Page 55
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...
Page 56
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...
Page 57
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...
Page 58
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. ...
Page 59
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 ...
Page 60
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...
Page 61
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.
Page 62
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...
Page 63
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...
Page 64
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...
Page 65
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...
Page 66
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...
Page 67
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...
Page 68
68 16.1.1.2 to remove discharge grille.
Page 69
69 16.1.1.3 to remove control board 16.1.1.4 to remove cross flow fan and indoor fan motor.
Page 70
70
Page 71: 17. Technical
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 ...
Page 72
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 ...
Page 73
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...
Page 74
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...
Page 75
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 (...
Page 76
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...
Page 77
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 ...
Page 78
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) ...
Page 79
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..
Page 80
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) ...
Page 81
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..
Page 82
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 ...