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Panasonic CS-E12RB4UW Service Manual

Summary of CS-E12RB4UW

  • Page 1

    © panasonic corporation 2015 order no: papamy1503095ce air conditioner indoor unit outdoor unit cs-e12rb4uw cs-e18rb4uw cu-e12rb4u cu-e18rb4u destination usa canada op en cl os e cl os e op en pow er t im er air swin g o ff /on m o d e powerful/ quiet t e m p o f f/ o n t im e r s e t c a n c e l o ...

  • Page 2: Table of Contents

    2 table of contents page page 1. Safety precautions ............................................. 3 2. Specifications ..................................................... 5 3. Features ............................................................. 11 4. Location of controls and components .............

  • Page 3: 1. Safety Precautions

    3 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.  the caution items state...

  • Page 4

    4 warning 20. During pump down operation, stop the compressor before remove the refrigeration piping. (removal of compressor while compressor is operating and valves are opened will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.) 21. After co...

  • Page 5: 2. Specifications

    5 2. Specifications model indoor cs-e12rb4uw outdoor cu-e12rb4u performance test condition ari power supply phase, hz single, 60 v 208 230 min. Mid. Max. Min. Mid. Max. Cooling capacity kw 1.20 3.48 3.90 1.20 3.48 3.90 btu/h 4100 11900 13300 4100 11900 13300 kcal/h (frig./h) – – – – – – running curr...

  • Page 6

    6 model indoor cs-e12rb4uw outdoor cu-e12rb4u indoor fan type backward fan material abs motor type dc / transistor (8-poles) input power w – output power w 40 speed qlo cool rpm 330 heat rpm 410 lo cool rpm 370 heat rpm 460 me cool rpm 460 heat rpm 540 hi cool rpm 560 heat rpm 620 shi cool rpm 600 h...

  • Page 7

    7 model indoor cs-e12rb4uw outdoor cu-e12rb4u piping pipe diameter (liquid / gas) mm (inch) 6.35 (1/4) / 12.70 (1/2) standard length m (ft) 7.5 (24.6) length range (min – max) m (ft) 3 (9.8) ~ 20 (65.6) i/d & o/d height different m (ft) 15.0 (49.2) additional gas amount g/m (oz/ft) 20 (0.2) length f...

  • Page 8

    8 model indoor cs-e18rb4uw outdoor cu-e18rb4u performance test condition ari power supply phase, hz single, 60 v 208 230 min. Mid. Max. Min. Mid. Max. Cooling capacity kw 1.17 5.13 5.47 1.17 5.13 5.47 btu/h 4000 17500 18700 4000 17500 18700 kcal/h (frig./h) – – – – – – running current a – 9.1 – – 7....

  • Page 9

    9 model indoor cs-e18rb4uw outdoor cu-e18rb4u indoor fan type backward fan material abs motor type dc / transistor (8-poles) input power w – output power w 40 speed qlo cool rpm 360 heat rpm 430 lo cool rpm 390 heat rpm 450 me cool rpm 540 heat rpm 610 hi cool rpm 700 heat rpm 770 shi cool rpm 750 h...

  • Page 10

    10 model indoor cs-e18rb4uw outdoor cu-e18rb4u piping pipe diameter (liquid / gas) mm (inch) 6.35 (1/4) / 12.70 (1/2) standard length m (ft) 7.5 (24.6) length range (min – max) m (ft) 3 (9.8) ~ 30.5 (100.0) i/d & o/d height different m (ft) 15.0 (49.2) additional gas amount g/m (oz/ft) 25 (0.3) leng...

  • Page 11: 3. Features

    11 3. Features  inverter technology o wider output power range o energy saving o quick cooling o quick heating o more precise temperature control  environment protection o non-ozone depletion substances refrigerant (r410a)  long installation piping o cs-e12rb4uw, cu-e12rb4u long piping up to 20 m...

  • Page 12

    12 4. Location of controls and components 4.1 indoor unit 4.2 outdoor unit 4.3 remote control op en cl os e cl os e op en pow er tim er air sw in g off /o n power (green) timer (orange) powerful (orange) quiet (orange) auto air swing (orange) control panel receiver auto off/on button airflow directi...

  • Page 13: 5. Dimensions

    13 5. Dimensions 5.1 indoor unit 22(55/64) 47 (1-17/32) 1 34 (5 -9/ 32 ) 61 (2 -13/3 2) 51 (2-1/64) mode p o w e r fu l / q u ie t temp off/on timer set cancel on off 1 2 3 a ir s w in g fa n s p e e d s e t c h e c k c l o c k r e s e t a c r c f a n s p e e d a i r s w i n g a u t o h e a t c o o ...

  • Page 14

    14 5.2 outdoor unit 5.2.1 cu-e12rb4u 5.2.2 cu-e18rb4u unit : mm (inch) 780 (30-23/32) 24.4 (1) 67.6 (2-5/8) 11.5 (1/2) 54 0 (21 -9 /3 2) (1 8 (3 /4 )) (6 9. 6 (2 -3 /4 )) (6 1. 6 (2- 3/ 8)) 289 (11-13/32) 34 .5 (1 -3 /8 ) 15 5 (6 -1 /8 ) 84 .8 (3 -3 /8 ) 570 (22-1/2) (104.7 (4-1/8)) 104.9 (4-1/8) 60...

  • Page 15

    15 6. Refrigeration cycle diagram indoor outdoor intake temp. Sensor pipe temp. Sensor 1 pipe (inlet) temp. Sensor 2 air temp. Sensor pipe temp. Sensor liquid side 2-way valve 3-way valve gas side cooling heat exchanger (evaporator) heat exchanger (condenser) heating compressor 4-way valve muffler h...

  • Page 16: 7. Block Diagram

    16 7. Block diagram 7.1 cs-e12rb4uw cu-e12rb4u fus e sc drain pu m p fa n mo t o r (o utdo or uni t ) (i ndo or uni t) 1 2 3 co m p re ss o r nois ef ilter ms 3~ m q1 fuse 103 fa n m ot or ry -c c101 4- w a ys va lv e sc ex p a n s io n va lv e rea c t o r pt c pt c pt c1 pt c2 ry -a c 1 ry -p w r n...

  • Page 17

    17 7.2 cs-e18rb4uw cu-e18rb4u (o utdoo r uni t) fus e sc dra in pu mp fa n mot o r (i ndoo r u n it ) si ngl e pha s e po w e r s uppl y l 1 2 3 n ms 3~ u p fus e 1 db 3 q1 ry -c 4- w a ys va lv e ry -h o t cr3 db 1 n v w m he a t e r th1 ntc sc db 2 f u se2 pt c 2 ct400 re ac to r th2 ntc pt c 1 ry...

  • Page 18

    18 8. Wiring connection diagram 8.1 indoor unit t˚ t˚ t˚ y b w bl r c o mmunic a ti on circui t noise fi lter ci r c uit r e c t if ic a t io n ci r c uit rectifi c a t ion circuit rectifi c a t ion circuit m cn -fm (wht) 7 6 5 4 1 2 1 g bl w r y/g g 01(g rn) ac 0 1 (b lk ) ac 0 2 (w h t ) a c 03 (r...

  • Page 19

    19 8.2 outdoor unit 8.2.1 cu-e12rb4u resistance of compressor windings model cu-e12rb4u connection 5rs102xha21 u-v 1.741 Ω u-w 1.711 Ω v-w 1.765 Ω note: resistance at 20°c of ambient temperature. Air temp. Sensor (thermistor) piping temp. Sensor (thermistor) compressor temp. Sensor (thermistor) (red...

  • Page 20

    20 8.2.2 cu-e18rb4u resistance of compressor windings model cu-e18rb4u connection 5kd240xaf21 u-v 0.720 Ω u-w 0.726 Ω v-w 0.708 Ω note: resistance at 20°c of ambient temperature. Electronic controller (noise filter) fg1 (green) noise filter circuit communication circuit cn-blk (black) ac-blk (black)...

  • Page 21

    21 9. Electronic circuit diagram 9.1 indoor unit t˚ t˚ t˚ y b w bl r communication circuit noise filter circuit rectification circuit rectification circuit rectification circuit m cn-fm (wht) 7 6 5 4 1 2 1 g bl w r y/g g01(grn) ac01(blk) ac02(wht) ac03(red) fuse01 t3.15a l250v transformer motor drai...

  • Page 22

    22 9.2 outdoor unit 9.2.1 cu-e12rb4u sensor (thermistor) characteristics 70 60 50 40 30 20 10 0 -10 (14) 0 (32) 10 (50) r e si st a n c e (k ) 20 (68) 30 (86) 40 (104) 50 (122) temperature °c (°f) temperature °c (°f) 1 2 1 2 outdoor air sensor outdoor heat exchanger sensor compressor temp. Sensor (t...

  • Page 23

    23 9.2.2 cu-e18rb4u electronic controller (noise filter) fg1 (green) noise filter circuit communication circuit cn-blk (black) ac-blk (black) cn-wht (white) ac-wht (white) rectification circuit rectification circuit switching power supply circuit fuse1 (t3.15a l250v) fuse2 (t3.15a l250v) fuse3 (25a,...

  • Page 24: 10.  Printed Circuit Board

    24 10. Printed circuit board 10.1 indoor unit 10.1.1 main printed circuit board cn-stm2 cn-stm1 cn-fm t-blk1 cn-drmtr1 t-blk2 cn-t2 cn-t1 cn-cnt cn-th2 jp3 (random auto restart enable/disable) cn-th1 sw01 sw02.

  • Page 25

    25 10.1.2 display printed circuit board cn-disp.

  • Page 26

    26 10.2 outdoor unit 10.2.1 main printed circuit board 10.2.1.1 cu-e12rb4u cn-dcfm fg1 cn-stm cn4 cn5 cn-tank cn-th cn-hot current transformer (ct) data ac-wht ac-blk power transistor (ipm).

  • Page 27

    27 10.2.1.2 cu-e18rb4u power transistor (ipm) cn-com current transformer (ct) ac-blk cn-ht cn-hot cn-acfm cn-tank cn-th1 cn-ev ac-wht.

  • Page 28

    28 10.2.2 noise filter printed circuit board 10.2.2.1 cu-e18rb4u cn-com cn-blk cn-wht fg1 com3 acl1 acn1.

  • Page 29: 11. Installation

    29 11. Installation instruction 11.1 indoor unit 11.1.1 selecting the location for the indoor unit provide a check port on the piping side ceiling for repair and maintenance.  install the indoor unit once the following conditions are satisfied and after receiving the customer approval. 1 the indoor...

  • Page 30

    30 11.1.2 installation of indoor unit this air conditioner uses a drain up motor. Horizontally install the unit using a level gauge. Ceiling opening dimensions and hanging bolt location the paper model for installation expand or shrink according to temperature and humidity. Check on dimensions befor...

  • Page 31

    31 vacuum drying after completing the piping connection, execute vacuum drying for the connecting piping and the indoor unit. The vacuum drying must be carried out by using the service ports of both the liquid and gas side valves. Caution use two wrenches and tighten with regular torque. Do not over...

  • Page 32

    32 11.1.5 heat insulation be sure to perform heat insulation on the drain, liquid and gas piping. Imperfection in heat insulation work leads to water leakage. 1 use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 248°f (120°c)). 2 precautions in h...

  • Page 33

    33 11.1.6 connecting the cable to the indoor  open the control board cover by removing 2 pcs of screw.  unscrew and open the conduit cover upper case. Remove the plug and fix the conduit connector to conduit cover with lock nut.  connecting wire between indoor unit and outdoor unit should be ul l...

  • Page 34

    34 2 fitting the decorative panel o temporarily secure the fixing screws (3 pcs.) before fitting the decorative panel. (for temporarily securing the front grille.) o place decorative panel on the screws (3 pcs.) before fitting, move decorative panel as illustrated and tighten all the screws (4 pcs.)...

  • Page 35

    35 11.2 outdoor unit 11.2.1 select the best location  if an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from the condenser is not obstructed.  there should not be any animal or plant which could be affected by hot air discharged.  keep the spac...

  • Page 36

    36 11.2.3 connect the piping 11.2.3.1 connecting the piping to indoor unit please make flare after inserting flare nut (locate at joint portion of tube assembly) onto the copper pipe. (in case of using long piping) connect the piping  align the center of piping and sufficiently tighten the flare nu...

  • Page 37

    37 11.2.4 evacuation of the equipment when installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedure. 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 micron...

  • Page 38

    38 9 secure the wire onto the control board with the holder (clamp). 10 after completing wiring connections, reattach the particular plate and control board cover (metal and plastic) to the original position with the screws. 11 for wire stripping and connection requirement, refer to instruction 11.1...

  • Page 39

    39 11.2.7 disposal of outdoor unit drain water  if a drain elbow is used, the unit should be placed on a stand which is taller than 1-3/16" (3 cm).  if the unit is used in an area where temperature falls below 32°f (0°c) for 2 or 3 days in succession, it is recommended not to use a drain elbow, fo...

  • Page 40: 12. Operation

    40 12. Operation control 12.1 basic function inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the microcomputer maintai...

  • Page 41

    41 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 42

    42 ii auto fan speed [cooling, dry]  according to room temperature and setting temperature, indoor fan speed is determined automatically.  when set temperature is not achieved, the indoor fan will operate according to pattern below.  when set temperature achieved, the indoor fan speed will be fix...

  • Page 43

    43 12.4 airflow direction 1. There is one type of airflow, vertical airflow (directed by horizontal vane). 2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature and intake air temperature) and manual (angles of direction can...

  • Page 44

    44 12.6 quiet operation (heating)  purpose o to provide quiet heating operation compare to normal operation.  control condition o quiet operation start condition when “powerful/quiet” button at remote control is pressed. Powerful/quiet led illuminates. O quiet operation stop condition when one of ...

  • Page 45

    45 12.9 auto restart control  when the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after power supply resumes.  thi...

  • Page 46: 13. Protection

    46 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 47

    47 13.1.4 compressor overheating prevention control  instructed frequency for compressor operation will be regulated by compressor top temperature. The changes of frequency are as below.  if compressor top temperature exceeds 107°c (224.6°f), compressor will be stopped, occurs 4 times per 20 minut...

  • Page 48

    48 13.2 protection control for cooling & soft dry operation 13.2.1 outdoor air temperature control  the compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.  this control will begin 1 minute after the compressor starts.  compresso...

  • Page 49

    49 13.2.5 dew prevention control 1  to prevent dew formation at indoor unit discharge area.  this control will be activated if: o outdoor air temperature and indoor pipe temperature judgment by microcontroller is fulfilled. O when cooling or dry mode is operated more than 20 minutes or more.  thi...

  • Page 50

    50 13.3.3 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 60°c (140°f), compressor will stop. 13.3.4 low temperature compressor oil return control  in heating...

  • Page 51: 14. Servicing

    51 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 52

    52 control receiving sound off/on mode is in standby condition) and press “ac reset” button at remote control. Press “auto off/on button” to toggle remote control receiving sound. O short “beep”: turn off remote control receiving sound. O long “beep”: turn on remote control receiving sound. After au...

  • Page 53

    53 14.3 remote control button 14.3.1 set button  to check remote control transmission code and store the transmission code to eeprom: o press “set” button continuously for 10 seconds by using pointer. O press “timer set” button until a “beep” sound is heard as confirmation of transmission code chan...

  • Page 54

    54 14.4 outdoor pcb test run operation (for pump down/servicing purpose)  the test run operation will be activated by short-circuiting cn-s (pin 1 and 2) at outdoor unit pcb after power supplied to outdoor unit terminal 1 and 2. The unit forced to run rated frequency cooling operation mode. Cu-e12r...

  • Page 55

    55 cu-e18rb4u power transistor (ipm) cn-com cn-s current transformer (ct) ac-blk cn-ht cn-hot cn-acfm cn-tank cn-th1 cn-ev ac-wht.

  • Page 56: 15. Troubleshooting

    56 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 57

    57 15.1.1 relationship between the condition of the air conditioner and pressure and electric current condition of the air conditioner cooling mode heating mode low pressure high pressure electric current during operation low pressure high pressure electric current during operation insufficient refr...

  • Page 58

    58 15.2 breakdown self diagnosis function 15.2.1 self diagnosis function (three digits alphanumeric code)  once abnormality has 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 u...

  • Page 59

    59 15.3 error codes table diagnosis display abnormality / protection control abnormality judgment protection operation problem check location h00 no memory of failure — normal operation — — h11 indoor/outdoor abnormal communication after operation for 1 minute indoor fan only operation can start by ...

  • Page 60

    60 diagnosis display abnormality / protection control abnormality judgment protection operation problem check location f95 outdoor cooling high pressure protection 4 times happen within 20 minutes — cooling high pressure protection  check refrigeration system  outdoor air circuit f96 power transis...

  • Page 61

    61 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 62

    62 15.4.2 h12 (indoor/outdoor capacity rank mismatched) malfunction decision conditions  during startup, error code appears when different types of indoor and outdoor units are interconnected. Malfunction caused  wrong models interconnected.  wrong indoor unit or outdoor unit pcbs mounted.  indo...

  • Page 63

    63 15.4.3 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 64

    64 15.4.4 h15 (compressor temperature sensor abnormality) malfunction decision conditions  during startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors. Malfunction caused  faulty connector connectio...

  • Page 65

    65 15.4.5 h16 (outdoor current transformer) malfunction decision conditions  an input current, detected by current transformer ct, is below threshold value when the compressor is operating at certain frequency value for 3 minutes. Malfunction caused  lack of gas  broken ct (current transformer) ...

  • Page 66

    66 15.4.6 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 67

    67 15.4.7 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 68

    68 15.4.8 h24 (indoor pipe temperature sensor 2 abnormality) malfunction decision conditions  during startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor 2 are used to determine sensor errors. Malfunction caused  faulty connector c...

  • Page 69

    69 15.4.9 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 70

    70 15.4.10 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 71

    71 15.4.11 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 conn...

  • Page 72

    72 15.4.12 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 ou...

  • Page 73

    73 15.4.13 h97 (outdoor 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. Malfunction caused  operation stops due to short circuit inside the fan motor winding.  op...

  • Page 74

    74 15.4.14 h98 (error code stored in memory and no alarm is triggered / no timer led flashing) malfunction decision conditions  indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is operating in heating operation.  phenomena: unit is stoppi...

  • Page 75

    75 15.4.15 h99 (indoor freeze prevention protection: cooling or soft dry) error code will not display (no timer led blinking) but store in eeprom malfunction decision conditions  freeze prevention control takes place (when indoor pipe temperature is lower than 2°c (35.6°f)) malfunction caused  air...

  • Page 76

    76 15.4.16 f11 (4-way valve switching failure) malfunction decision conditions  when indoor heat exchanger is cold during heating (except deice) or when indoor heat exchanger is hot during cooling and compressor operating, the 4-way valve is detected as malfunction. Malfunction caused  indoor heat...

  • Page 77

    77 15.4.17 f90 (power factor correction protection) malfunction decision conditions  to maintain dc voltage level supply to power transistor.  to detect high dc voltage level after rectification. Malfunction caused  during startup and operation of cooling and heating, when power factor correction...

  • Page 78

    78 15.4.18 f91 (refrigeration cycle abnormality) malfunction decision conditions  the input current is low while the compressor is running at higher than the setting frequency. Malfunction caused  lack of gas.  3-way valve close. Troubleshooting when f91 indication happens. For safety reason and ...

  • Page 79

    79 15.4.19 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  faulty outdoor pcb  faulty compressor t...

  • Page 80

    80 15.4.20 f95 (outdoor high pressure protection: cooling or soft dry) malfunction decision conditions  during operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by the outdoor unit heat exchanger thermistor. Malfunction caused  outdoor heat exchan...

  • Page 81

    81 15.4.21 f96 (ipm overheating) malfunction decision conditions  during operating of cooling and heating, when ipm temperature data (100°c (202°f)) is detected by the ipm temperature sensor. Multi models only o compressor overheating: during operation of cooling and heating, when the compressor ol...

  • Page 82

    82 15.4.22 f97 (compressor overheating) malfunction decision conditions  during operation of cooling and heating, when compressor tank temperature data (112°c (233.6°f)) is detected by the compressor tank temperature sensor. Malfunction caused  faulty compressor tank temperature sensor  2/3 way v...

  • Page 83

    83 15.4.23 f98 (input over current detection) malfunction decision conditions  during operation of cooling and heating, when an input over-current (x value in total running current control) is detected by checking the input current value being detected by current transformer (ct) with the compresso...

  • Page 84

    84 15.4.24 f99 (dc peak detection) malfunction decision conditions during startup and operation of cooling and heating, when inverter dc peak data is received by the outdoor internal dc peak sensing circuitry. Malfunction caused  dc current peak due to compressor failure.  dc current peak due to d...

  • Page 85

    85 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 disassembly of part...

  • Page 86

    86 4 to remove the electronic controller, release the 6 hooks that hold it to the control board (fig. 4). Fig. 4 5 remove the front grille by removing the screw a and scr ews b, c & d half way open (fig. 5). Fig. 5 6 remove the air guider and drain pan complete by removing the screws (fig. 6). Fig. ...

  • Page 87

    87 8 remove the fan motor by release the fan motor lead wire connectors and fan motor screws (fig. 8). Fig. 8 screws connectors.

  • Page 88

    88 16.2 outdoor electronic controller removal procedure 16.2.1 cu-e12rb4u caution! When handling electronic controller, be careful of electrostatic discharge. 1 remove the 3 screws of the top panel. Fig. 1 2 remove the 6 screws of the front panel. Fig. 2 3 remove the screw of the terminal board cove...

  • Page 89

    89 16.2.2 cu-e18rb4u caution! When handling electronic controller, be careful of electrostatic discharge. 1 remove the 4 screws of the top panel. Fig. 1 2 remove the 10 screws of the front panel. Fig. 2 3 remove the top cover of the electronic controller. Fig. 3 4 remove the control board. Fig. 4 5 ...

  • Page 90: 17. Technical

    90 17. Technical data technical data provided are based on the air conditioner running under free frequency. 17.1 cool mode performance data unit setting: standard piping length, hi fan, cool mode at 16°c (60.8°f) voltage: 208v/230v 17.1.1 cs-e12rb4uw cu-e12rb4u rated frequency (compressor speed is ...

  • Page 91

    91 17.1.3 cs-e12rb4uw cu-e12rb4u maximum capacity indoor (°c / °f) outdoor (°c / °f) db wb -17.8 (0) -10 (14) 0 (32) 5 (41) tc shc ip tc shc ip tc shc ip tc shc ip 27 (80.6) 19.0 (66.20) 13493 11821 880 13499 11827 892 13424 11923 871 13643 12118 823 22.0 (71.60) 14251 8400 931 14237 8392 942 14285 ...

  • Page 92

    92 17.2 heat mode performance data unit setting: standard piping length, hi fan, heat mode at 30°c (86°f) voltage: 208v/230v 17.2.1 cs-e12rb4uw cu-e12rb4u rated frequency (compressor speed is fixed during forced heating or cooling for capacity measurement and diagnosis purpose) indoor (°c / °f) outd...

  • Page 93: 18. Service

    93 18. Service data service data provided are based on the air conditioner running under rated frequency during forced cooling / forced heating mode. 18.1 cool mode outdoor air temperature characteristic condition  indoor room temperature: 27°c (80.6°f) dry bulb/19°c (66.2°f) wet bulb  unit settin...

  • Page 94

    94 18.1.2 cs-e18rb4uw cu-e18rb4u -20 (-4) -15 (4.9) -10 (14) -5 (23) 0 (32) 5 (41) 10 (50) 15 (59) 20 (68) 25 (77) 30 (86) 35 (95) 40 (104) 45 (113) 50 (122) outdoor air temperature °c (°f) -20 (-4) -15 (4.9) -10 (14) -5 (23) 0 (32) 5 (41) 10 (50) 15 (59) 20 (68) 25 (77) 30 (86) 35 (95) 40 (104) 45 ...

  • Page 95

    95 18.2 heat mode outdoor air temperature characteristic condition  indoor room temperature: 20°c (68°f) dry bulb/ -°c wet bulb  unit setting: standard piping length, forced heating at 30°c (86°f), hi fan  compressor frequency: rated for heating operation  piping length: 7.5 m (24.6 ft)  voltag...

  • Page 96

    96 18.2.2 cs-e18rb4uw cu-e18rb4u ou tle ta ir °c (°f ) c urre nt (a ) g as s id e p ip in g pr es su re m p a (psi ) 208 230 outdoor air temperature °c (°f) -15 (4.9) -10 (14) -5 (23) 0 (32) 5 (41) 10 (50) 15 (59) 20 (68) 25 (77) 39.0 (102.2) 40.0 (104.0) 41.0 (105.8) 42.0 (107.6) 43.0 (109.4) 44.0 ...

  • Page 97

    97 18.3 piping length correction factor the characteristic of the unit has to be corrected in accordance with the piping length. 18.3.1 cs-e12rb4uw cu-e12rb4u 18.3.1.1 cooling capacity 18.3.1.2 heating capacity note: the graphs show the factor after added right amount of additional refrigerant. Pipi...

  • Page 98

    98 18.3.2 cs-e18rb4uw cu-e18rb4u 18.3.2.1 cooling capacity 18.3.2.2 heating capacity note: the graphs show the factor after added right amount of additional refrigerant. Capa ci ty co rre cti o n fact o r piping length m (ft) 0.96 0.97 0.98 0.99 1.00 1.01 1.02 0 (0) 5 (16.4) 10 (32.8) 15 (49.2) 20 (...

  • Page 99

    99 19. Exploded view and replacement parts list 19.1 indoor unit a a 35 36 37 40 38 41 18 17 16 19 23 15 25 44 42 47 39 22 24.

  • Page 100

    100 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. O/i i/i i/i 52 53 54 1 4 26 29 27 28 30 33 32 31 51 48 11 14 12 13 9 6 7 2 8 3 21 5 51a 48a.

  • Page 101

    101 safety ref. No. Part name & description qty cs-e12rb4uw cs-e18rb4uw remark 1 base pan ass’y 1 cwd52k1100 ← 2 inner polystyrene complete 1 cwg07c1047a ← 3 cabinet side plate ass’y 1 cwe041121 ← 4 cabinet side plate ass’y 1 cwe041122 ← 5 lead wire - fan motor 1 cwa67c5136 ← o 6 fan motor 1 ehds50a...

  • Page 102

    102 safety ref. No. Part name & description qty cs-e12rb4uw cs-e18rb4uw remark 52 operating instruction 1 cwf569879 ← 53 installation instruction 1 cwf616670 ← 54 installation instruction 1 cwf616671 ← (note)  all parts are supplied from papamy, malaysia (vendor code: 00029488).  “o” marked parts ...

  • Page 103

    103 19.2 cz-bt20u (front grille complete) 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. 13 12 4 21 14 22 5 10 29 8 7 9 24 28 1 6.

  • Page 104

    104 safety ref. No. Part name & description qty cz-bt20u remark 1 front grille - complete 1 cwe11c6074 4 a.S motor dc single 12v 250 ohm 2 cwa981105j o 5 bracket - a.S.Motor 1 cwd932522 6 vane 4 cwe241159 7 shaft 6 cwh631038 8 shaft 2 cwh631045 9 connector - shaft 4 cwh081007 10 bearing 6 cwh641008 ...

  • Page 105

    105 19.3 outdoor unit 19.3.1 cu-e12rb4u 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. 29 61 32 28 60 27 16 17 15 34 33 25 26 19 39 38 21 20 24 9 14 11 10 50 1 4 23b 23a 2 31 8 7 52 51 53 55 54 35 ...

  • Page 106

    106 safety ref. No. Part name & description qty. Cu-e12rb4u remark 1 chassis complete 1 cwd50k2081a 2 sound proof material 1 cwg302570 3 fan motor bracket 1 cwd541089 4 screw - fan motor bracket 2 cwh551217 5 fan motor 1 arw6404ac o 6 screw - fan motor mount 4 cwh55252j 7 propeller fan assy 1 cwh03k...

  • Page 107

    107 19.3.2 cu-e18rb4u 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. 47 12 30 6 22 65 38 40 31 51 43 32 48 33 20 19 75 2 76 18 4 3 23 24 69 1 25 81 28 78 79 14 77 8 11 45 10 7 9 71 70 72 74 73 41 4...

  • Page 108

    108 safety ref no. Description & name qty. Cu-e18rb4u remark 1 chassis complete 1 cwd52k1228a 2 anti - vibration bushing 3 cwh50055 3 compressor 1 5kd240xaf21 o 4 nut - compressor mount 3 cwh561049 5 sound proof material 1 cwg302246 6 fan motor bracket 1 cwd541127 7 fan motor 1 ehds80cac o 8 screw -...

  • Page 109

    109 safety ref no. Description & name qty. Cu-e18rb4u remark 80 tube assy co. (cap. Tube) 1 cwt01c6093 81 discharge muffler (4 w. Valve) 1 cwb121055 (note)  all parts are supplied from papamy, malaysia (vendor code: 00029488).  “o” marked parts are recommended to be kept in stock. Printed in malay...