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Panasonic CS-PW18GKE, Service Manual, Page: 39 / 53

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Panasonic CS-PW18GKE Service Manual Download Page 39

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14 Troubleshooting Guide

14.1. 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.

Summary of Contents for CS-PW18GKE

Page 1: ... 9 5 2 Outdoor Unit 10 6 Refrigeration Cycle Diagram 11 7 Block Diagram 12 8 Wiring Connection Diagram 13 9 Electronic Circuit Diagram 14 9 1 Indoor Unit 14 9 2 Outdoor Unit 14 10 Printed Circuit Board 15 10 1 Indoor Unit 15 10 2 Outdoor Unit 17 10 3 Indicator Receiver 18 11 Installation Instruction 19 11 1 Select The Best Location 19 11 2 Indoor Outdoor Unit Installation Diagram 19 11 3 Indoor Un...

Page 2: ...Of The Air Conditioner And Pressure And Electric Current 40 14 3 Diagnosis Methods Of A Malfunction Of A Compressor And 4 way Valve 40 15 Disassembly and Assembly Instructions 41 15 1 Indoor Electronic Controllers Removal Procedures 41 15 2 Cross Flow Fan and Indoor Fan Motor Removal Procedures 42 15 3 Remote Control Reset 43 16 Technical Data 44 16 1 Thermostat Characteristics 44 16 2 Sensible Ca...

Page 3: ...rm location which is able to withstand the set s weight If the strength is not enough or installation is not properly done the set will drop and cause injury 5 For electrical work follow the local national wiring standard regulation and the installation instruction An independent circuit and single outlet must be used If electrical circuit capacity is not enough or defect found in electrical work ...

Page 4: ...g one of the following methods Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency In some countries permanent connection of this room air conditioner to the power supply is prohibited 1 Power supply connection to the receptacle using a power plug Use an approved power plug with earth pin for the connection to the socket 2 Power sup...

Page 5: ...eration Oil Charged cm3 RB68A or FREOL ALPHA 68M 670 Refrigerant Charged R410A kg oz 1 33 47 0 Dimension Height mm inch 275 10 13 16 540 21 1 4 Width mm inch 998 39 9 32 780 30 23 32 Depth mm inch 230 9 1 6 289 11 3 8 Net Weight kg lbs 11 0 24 44 0 97 Pipe Diameter Gas mm inch 12 70 1 2 Liquid mm inch 6 35 1 4 Height Difference m ft 20 65 6 Pipe Length Range m ft 3 9 8 25 82 0 Additional Gas Amoun...

Page 6: ... Aluminium Pre coat Fin Type Slit Fin Corrugated Fin Row x Stage x FPI 2 x 15 x 21 2 x 20 x 17 Size W x H x L mm inch 810 x 315 x 25 4 684 6 719 2 x 508 x 44 Air Filter Type Material P P Honey Comb Style One Touch Item Unit Power Source Phase Voltage Cycle ø Single V 230 Hz 50 Input Power Cooling W 1 75k Heating W 1 58k Annual consumption W 875 Starting Current A 27 Running Current Cooling A 7 7 H...

Page 7: ...power failure for safety restart operation Gas leakage detection Prevent Compressor reverse cycle Inner protector to protect Compressor Noise prevention during soft dry operation Pre coated Condenser for high resistance to corrosion Overload protection control Heating Outdoor fan control Compressor high pressure control Serviceability Improvement Removable and washable Front Panel Environmental Pr...

Page 8: ...8 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Remote Control ...

Page 9: ...9 5 Dimensions 5 1 Indoor Unit Remote Control ...

Page 10: ...10 5 2 Outdoor Unit ...

Page 11: ...11 6 Refrigeration Cycle Diagram ...

Page 12: ...12 7 Block Diagram ...

Page 13: ...13 8 Wiring Connection Diagram ...

Page 14: ...14 9 Electronic Circuit Diagram 9 1 Indoor Unit 9 2 Outdoor Unit ...

Page 15: ...15 10 Printed Circuit Board 10 1 Indoor Unit ...

Page 16: ...16 ...

Page 17: ...17 10 2 Outdoor Unit ...

Page 18: ...18 10 3 Indicator Receiver ...

Page 19: ...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 spaces indicated by arrows from wall ceiling fence or other obstacles Do not place any obstacles which may cause a short circuit of the discharged air If piping length is o...

Page 20: ...method is by putting measuring tape at position as shown in the diagram above The hole centre is obtained by measuring the distance namely 150 mm and 125 mm for left and right hole respectively Drill the piping hole at either the right or the left and the hole should be slightly slanted to the outdoor side 11 3 2 TO DRILL A HOLE IN THE WALL AND INSTALL A SLEEVE OF PIPING 1 Insert the piping sleeve...

Page 21: ...21 3 For the embedded piping This can be used for left rear piping left bottom piping also ...

Page 22: ...oroprene sheathed 5 x 1 5 mm2 flexible cord type designation 245 IEC 57 or heavier cord Ensure the colour of wires of outdoor unit and the terminal Nos are the same to the indoor s respectively Earth lead wire shall be longer than the other lead wires as shown in the figure for the electrical safety in case of the slipping out of the cord from the anchorage Secure the cable onto the control board ...

Page 23: ...and sufficiently tighten the flare nut with fingers Further tighten the flare nut with torque wrench in specified torque as stated in the table Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter Remove burrs from cut edge Make flare after inserting the flare nut locate at valve onto the copper pipe Align center of piping to valves and then tighten with tor...

Page 24: ... service port caps of the 3 way valve at a torque of 18 NO m with a torque wrench 7 Remove the valve caps of both of the 2 way valve and 3 way valve Position both of the valves to OPEN using a hexagonal wrench 4 mm 8 Mount valve caps onto the 2 way valve and the 3 way valve Be sure to check for gas leakage 11 4 4 CONNECT THE CABLE TO THE OUTDOOR UNIT FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT 1 Re...

Page 25: ...e 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 During heating operation the compressor will stop running and restart as shown in below figure 12 1 1 Heating Operation Time Diagram ...

Page 26: ...perature 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 During cooling operation the compressor will stop running and restart as shown in below figure 12 2 1 Cooling Operation Time Diagram ...

Page 27: ...egins Soft Dry will be switched ON for a maximum 10 minutes then Soft Dry operation will be turned OFF for a minimum 6 minutes After that the Soft Dry operation will be ON and OFF based on the setting temperature as shown in below figure However after 3 minutes of compressor off during Soft Dry OFF within 6 minutes Soft Dry restart control the indoor unit will start to operate at normal Cooling mo...

Page 28: ...ugh after 1 hour from automatic operation mode started Automatic Set Temperature For each operation set temperature will automatically set as shown below The setting temperature for all the operations can be changed one level up or one level down from the standard temperature as shown in below table by pressing on the temperature up or temperature down button at remote control The operation mode j...

Page 29: ...r force stop by pressing the OFF ON operation button at the remote control is permitted The reason for the compressor to force operate at minimum 60 seconds is to allow the refrigerant oil run in a full cycle and return back to the outdoor unit 12 5 3 7 Minutes Time Save Control The compressor will start automatically if it has stopped for 7 minutes and the intake air temperature falls between the...

Page 30: ...lure 12 5 6 Starting Current Control When the compressor outdoor fan motor and indoor fan motor are simultaneously started the indoor fan motor will start to operate at 1 6 second later The reason of the difference is to reduce the starting current flow 12 5 7 Dew Prevention Control Purpose is to prevent dew formation on indoor unit air discharge area The following conditions occur for 30 minutes ...

Page 31: ...ompressor restart V T Indoor heat exchanger temperature Intake air temperature This is to prevent compressor from rotate reversely when there is an instantaneous power failure 12 5 10 Overload Protection Control Outdoor Fan Control If the temperature of the Outdoor Heat Exchanger less than 3 C Outdoor Fan is ON The Outdoor Fan stop when Outdoor Heat Exchanger temperature is Tb or more according to...

Page 32: ...tions detection commences in Heating operation starts or 60 minutes after previous deice operation If the outdoor piping temperature drops to 4 C for 50 sec continuously during compressor is in operation deice will start There is no detection during Outdoor Fan stops Overload Deicing During heating operation if the outdoor Fan OFF duration due to overload control is accumulated up to 60 minutes an...

Page 33: ...33 a Normal Deicing Time Diagram b Overload Deicing Time Diagram ...

Page 34: ...l be switched to Hi fan speed from Lo after 70 seconds from the start of compressor This cause the room temperature to achieve the setting temperature quickly 4 During compressor stop indoor fan will operate at Lo for the beginning 20 seconds to prevent higher volume of refrigerant in liquid from returning to the compressor 5 After the compressor at turn off condition for 3 minutes indoor fan will...

Page 35: ...r 6 minutes indoor fan will start fan speed at Lo to circulate the air in the room This is to obtain the actual reading of intake air temperature Auto Fan Speed during Heating operation 1 Indoor fan will rotate in the range of SLo Me according to the heat exchanger temperature 12 6 3 Manual Fan Speed Control Manual fan speed adjustment can be carried out by using the Fan Speed selection button at ...

Page 36: ...w prevention control Airflow Direction Auto control angle change from 10 38 to 10 27 under Cooling and Soft Dry operation mode Heating Operation condition When the piping air temperature reaches 38 C the louver is changed from upper to lower limit When the piping air temperature falls to 35 C the louver is changed from lower to upper limit Cooling and Soft Dry Operation Heating Operation 12 8 2 Ma...

Page 37: ... the set time to detect the intake air temperature to determine the operation mode The operation indication lamp will blink at this time 12 9 2 OFF Timer When OFF Timer is set by using the remote control the unit will stop operate according to the desired setting 12 10 Random Auto Restart Control If there is a power failure during operation the air conditioner will automatically restart after 3 to...

Page 38: ...o OFF ON Button to toggle the remote control sound Short beep Turn ON remote control signal receiving sound Long beep Turn OFF remote control signal receiving sound After Auto OFF ON Button is pressed the 20s counter for various setting mode is restarted 13 1 2 Select Remote Control Transmission Code There are 4 types of remote control transmission code could be selected and stored in EEPROM of in...

Page 39: ... 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 40: ...cy of the outdoor unit Inefficient compression Nature of fault Symptom Electric current during operation becomes approximately 20 lower than the normal value Insufficient compressing of a compressor The discharge tube of the compressor becomes abnormally hot normally 70 to 90 C The difference between high pressure and low pressure becomes almost zero Locked compressor Electric current reaches a hi...

Page 41: ... Controllers Release the 2 Particular Piece Fig 3 Release the Earth Wire screw Fig 3 Release the screw holder terminal board Fig 3 Release the CN DISP connector Fig 3 Release the CN TH connector Fig 4 Release the hooks that hold the Electronic Controller and pull out the Electronic Controller Fig 4 Release the CN FM connector Fig 4 Release the AC01 white connector Fig 4 Release the two RY PWR conn...

Page 42: ...ase the CN TH connector Fig 5 c Release the CN STM1 connector Fig 5 d Release the CN DISP connector Fig 5 e Pull out the Drain Hose from outlet to remove the Discharge Grille Fig 5 2 Release the 3 screws Fig 6 3 By pressing down the hook at the left you will be able to remove the Control Board Fig 6 Fig 5 Fig 6 4 Remove the screw at the Cross Flow Fan Fig 7 5 Remove the Bearing Fig 8 6 Remove the ...

Page 43: ...installing the Cross Flow Fan Fig 9 15 3 Remote Control Reset When the batteries are inserted for the first time or the batteries are replaced you may notice the indications at remote control s display screen blink continuously and not functionable If this condition happens try to reset the remote control by pushing the reset terminal with a pointing device You may also do the reset to erase the s...

Page 44: ...44 16 Technical Data 16 1 Thermostat Characteristics 16 1 1 CS PW18GKE ...

Page 45: ...C IP 17 0 C 5 06 3 83 1 60 4 73 3 68 1 72 4 40 3 53 1 84 4 00 3 36 1 99 19 0 C 5 10 1 75 19 5 C 5 55 4 02 1 63 5 19 3 86 1 676 4 83 3 71 1 88 4 39 3 53 2 03 22 0 C 6 05 4 16 1 66 5 66 4 00 1 79 5 26 3 86 1 91 4 78 3 68 2 06 TC SHC IP Total Cooling Capacity kW Sensible Heat Capacity kW Input Power kW Indoor 27 C 19 C Outdoor 35 C 24 C ...

Page 46: ...46 16 3 Operation Characteristics 16 3 1 CS PW18GKE CU PW18GKE ...

Page 47: ...47 ...

Page 48: ...48 ...

Page 49: ...49 ...

Page 50: ...7 Exploded View and Replacement Parts List 17 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 51: ... CWE241153C 17 CAP DRAIN TRAY 1 CWH521096 18 BACK COVER CHASSIS 1 CWD932162B 19 CONTROL BOARD CASING 1 CWH102250 20 TERMINAL BOARD COMPLETE 1 CWA28C2306 21 POWER SUPPLY CORD 1 CWA20C2553 22 ELECTRONIC CONTROLLER MAIN 1 CWA743545 23 INDICATOR COMPLETE 1 CWE39C1173 24 INDICATOR HOLDER 1 CWD932435 25 INDICATOR HOLDER 1 CWD932436 26 SENSOR COMPLETE 1 CWA50C2122 27 CONTROL BOARD TOP COVER 1 CWH131209 2...

Page 52: ...52 17 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 53: ...MINAL COVER 1 CWH7080300J 22 HOLDER SENSOR 1 CWH32074 23 V COIL COMPLETE 1 CWA43C2121J 24 SENSOR COMPLETE 1 CWA50C618 25 TERMINAL BOARD ASSY 1 CWA28K1070J 26 CONTROL BOARD 1 CWH102202 27 CONTROL BOARD 1 CWH102226 28 CAPACITOR FM 2MF 440V 1 DS441205NPQA 29 CAPACITOR COMP 50MF 370V 1 DS371506CPNA 30 CAPACITOR COMP HOLDER 1 CWH30060 31 ELECTRONIC CONTROLLER MAIN 1 CWA743262 32 CABINET SIDE PLATE L 1 ...

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