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Panasonic CS-C28GKF, Service Manual

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Panasonic CS-C28GKF Service Manual Download Page 43

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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-C28GKF

Page 1: ...Circuit Diagram 14 10 Printed Circuit Board 15 10 1 Main Printed Circuit Board 15 10 2 Power Printed Circuit Board 17 10 3 Indicator panel 18 11 Installation Instruction 19 11 1 Indoor Unit 20 11 2 Outdoor Unit 22 12 Operation and Control 25 12 1 Cooling Operation 25 12 2 Soft Dry Operation 26 12 3 Automatic Operation 27 12 4 Operation Control 28 12 5 Indoor Fan Speed Control 31 12 6 Outdoor Fan S...

Page 2: ...s 45 15 1 Indoor Electronic Controllers and Control Board Removal Procedures 45 15 2 Indoor Fan Motor and Cross Flow Fan Removal Procedures 48 16 Technical Data 50 16 1 Thermostat Characteristics 50 16 2 Operation Characteristics 51 16 3 Fan Performance 53 16 4 Capacity and Power Consumption 53 17 Exploded View and Replacement Parts List 55 17 1 Indoor Unit 55 17 2 Outdoor Unit 57 ...

Page 3: ... and servicing Otherwise it will cause the set to fall water leakage fire or electrical shock 4 Install at a strong and firm 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 independe...

Page 4: ...tenance 2 Power supply connection to the conditioner Connect the power supply cord of the air conditioner to the mains using 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 ...

Page 5: ... inch 275 10 13 16 750 29 17 32 Width mm inch 998 39 9 32 875 34 7 16 Depth mm inch 230 9 1 16 345 13 19 32 Net Weight kg lbs 11 24 68 150 Pipe Diameter Gas mm inch 15 28 5 8 Liquid mm inch 6 35 1 4 Height Difference m ft 20 65 6 Pipe Length Range m ft 3 9 8 30 98 4 Additional Gas Amount g m oz ft 30 0 3 Refrigeration Charge Less m ft 7 5 24 6 Drain Hose Inner diameter mm 16 Length mm 650 Compress...

Page 6: ...cle ø Single Single V 220 240 Hz 50 50 Input power W 2 76 k 2 92 k Starting Current A 83 83 Running Current Cooling A 13 1 13 8 Power Factor Cooling A 96 98 Power factor means total figure of compressor indoor fan motor and outdoor fan motor Power Cord Number of core 3 1 5mm Length m ft 2 6 Thermostat Mechanical Protection Device ...

Page 7: ... bacteria Generated supersonic waves enhance the ability to collect dust and dirt in the air Quality Improvement Random auto restart after power failure for safety restart operation Gas leakage detection Prevent Compressor reverse cycle Inner protector to protect Compressor Noise prevention during soft dry operation Blue coated Condenser for high resistance to corrosion Anti dew formation control ...

Page 8: ...8 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 ...

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

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 ...

Page 15: ...15 10 Printed Circuit Board 10 1 Main Printed Circuit Board ...

Page 16: ...16 ...

Page 17: ...17 10 2 Power Printed Circuit Board ...

Page 18: ...18 10 3 Indicator panel ...

Page 19: ...t 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 over 7 5 m additional refrigerant should be add...

Page 20: ...ad and using a level gauge 2 Drill the piping plate hole with ø70 mm hole core drill Line according to the arrows marked on the lower left and right side of the installation plate The meeting point of the extended line is the centre of the hole Another 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 a...

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

Page 22: ...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 strong wind and earthquake Please fasten the installation stand firmly with bolt or nails 11 2 2 CONNECTING THE PIPING Connecting The Piping To Indoor Unit Please make flare after inserting f...

Page 23: ...Liquid side 3 way valve 3 Connect the Charging Cylinder to the Manifold gauge set and open the valve of the Cylinder 4 Open the low pressure side valve of the Manifold gauge for approx 10 seconds and then close 5 Check gas leakage of the connecting portion of pipings with the gas leak detector For the left pipings 1 Measure the pressure 2 Keep it for 5 10 minutes Ensure if the pressure indicated o...

Page 24: ...thed 4 1 5 mm2 flexible cord type designation 245 IEC 57 or heavier cord 3 Secure the cable onto the control board with the holder clamper 4 Cable connection to the power supply 220 240V 50 Hz through knife switch Disconnecting means Connect the approved polychloroprene sheathed power supply cable 3 x 4 0 mm2 C28GK type designation 245 IEC 57 or heavier cord to the terminal board and connect the o...

Page 25: ...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 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 1 1 Cooling Operation Time Diagram ...

Page 26: ...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 27: ... determined operation mode until it is switched off using remote control with the setting temperature as shown in below table 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 judging temperature and stand...

Page 28: ... the built up humidity inside a room 12 4 3 60 Seconds Forced Operation Once the air conditioner is turned on the compressor will not stop within 60 seconds in a normal operation although the intake air temperature has reached the thermo off temperature However force stop by pressing the OFF ON operation button at the remote control is permitted The reason for the compressor to force operate at mi...

Page 29: ...er ate at 1 6 second later The reason of the difference is to reduce the starting current flow 12 4 7 Dew Prevention Control Purpose is to prevent dew formation on indoor unit air discharge area When room temperature is constant 1 C the following conditions occur for 30 minutes continuously anti dew formation will activate Remote Control setting temperature is less than 25 C Compressor is on Cooli...

Page 30: ...l control angle change from 10 14 18 22 27 to 10 13 16 19 22 under Cooling and Soft Dry operation mode 3 Narrowing Horizontal Airflow Direction During dew prevention control Airflow Direction Auto control angle change form 0 44 to 14 30 under Cooling and Soft Dry operation mode During dew prevention control Airflow Direction Manual control angle change from 0 11 22 33 44 to 14 18 22 26 30 under Co...

Page 31: ...perate indoor fan will 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 form returning to the compressor 5 After the compressor at turn off condition for 3 mi...

Page 32: ...r outdoor fan motor Outdoor fan speed can be changed to Hi or Lo according to outdoor temperature For Cooling or Soft Dry operation when outdoor temperature reaches to 31 C Hi speed 29 C Lo speed When the air conditioner is turned on the compressor and the outdoor fan will operate simultaneously Likewise both compressor and outdoor fan will stop at the same time if the unit is turned off 12 7 Vert...

Page 33: ...n is set to Manual using the remote control the automatic airflow is released and the airflow direction vane move left and right in the range shown in the diagram The louver can be adjusted by pressing the button to the desired vane position When stopped with remote control the vanes is reset and stopped at reset position 12 9 Powerful Operation The Powerful operation is to achieve the setting tem...

Page 34: ...uiet operation stops when Quiet button is pressed again Stopped by OFF ON operation button Timer OFF activates Powerful button is pressed 12 11 Timer Control 12 11 1 ON Timer When the ON Timer is set by using the remote control the unit will start to operate slightly before the set time so that the room will reach nearly to the set temperature by the set time For Cooling and Soft Dry operation the...

Page 35: ...ration and power failure occur restart time for each unit to operate will be decided randomly using 4 parameters intake air temperature setting temperature fan speed and air swing louver position This Random Auto Restart Control is not available when Timer is set This control can be omitted by open the circuit of JX02 Refer printed circuit board indoor unit 12 13 Remote Control Signal Receiving So...

Page 36: ...rent resistance value with maximum resistance value from time to time to get the Air Dirtiness Value There are 3 air dirtiness level based on the Air Dirtiness Value Air Dirtiness level 0 Clean Air Dirtiness level 1 Moderate Air Dirtiness level 2 Contaminated Dirtiness level sensitivity adjustment It is possible to change the gas sensor sensitivity where the Threshold value G1 G4 will be shifted a...

Page 37: ...tioner and no change on LCD display During Patrol individual operation if e ion stops Airflow direction louver closed e Indicator When Patrol operation starts Patrol Sensor indicator ON When e ion operation starts based on dirtiness level e ion indicator ON f Remote Control Receiving Sound g Timer Control When ON timer activates when unit stops previous operation resumes without Patrol operation W...

Page 38: ...starts During unit is OFF if e ion button is pressed e ion individual operation starts b e ion operation stop condition When OFF ON button is pressed to stop the operation When e ion button is pressed again When Patrol button is pressed When OFF Timer activates c e ion operation pause condition When indoor fan stop during deice odor cut control thermostat off etc e ion operation resume after indoo...

Page 39: ...isplay c Timer control When ON timer activates when unit stops previous operation resumes without e ion operation When ON timer activates during any operation no change and carry on current operation When OFF timer activates during any operation all operation stops d Indicator When e ion operation starts e ion indicator ON e e ion Check Mode To check if e ion is malfunctioning during e ion operati...

Page 40: ... and check the e ion AIR PURIFYING SYSTEM main connector to PCB After that press e ion button again to confirm the e ion indicator not blinking The 24 times counter will be clear after 10 minutes of normal operation or when operation stops Error Reset Method Press OFF ON button to OFF the operation Press AUTO OFF ON button at indoor unit to OFF the operation OFF Timer activates Press e ion button ...

Page 41: ... 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 type of remote control transmission code could be selected and stored in EEPROM of indoor unit The indoor unit will only operate when received signal with same tr...

Page 42: ...und will be heard LCD returns to original display after 2 seconds LCD returns to original display if remote control does not operate for 30 seconds 13 2 2 CLOCK BUTTON To change the remote control s time format Press for more than 5 seconds 13 2 3 RESET RC To clear and restore the remote control setting to factory default Press once to clear the memory 13 2 4 TIMER To change indoor unit indicator ...

Page 43: ... 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 44: ...logged capillary tube or Strainer Short circuit in the indoor unit Heat radiation deficiency of the outdoor unit Inefficient compression Nature of fault Symptom Insufficient compressing of a compressor Electric current during operation becomes approximately 20 lower than the normal value The discharge tube of the compressor becomes abnormally hot normally 70 to 90 C The difference between high pre...

Page 45: ...s WARNING Cautions When handling electronic controller be careful of electrostatic discharge Be sure to return the wiring to its original position There are many high voltage components within the heat sink cover so never touch the interior during operation Wait at least two minutes after power has been turned off ...

Page 46: ...46 ...

Page 47: ...47 ...

Page 48: ...48 15 2 Indoor Fan Motor and Cross Flow Fan Removal Procedures ...

Page 49: ...49 ...

Page 50: ...50 16 Technical Data 16 1 Thermostat Characteristics 1 Characteristics of thermostat ...

Page 51: ...51 16 2 Operation Characteristics ...

Page 52: ...52 ...

Page 53: ...831 7 667 4 949 3 078 7 138 4 780 3 363 6 774 4 655 3 573 6 305 4 264 4 215 22 9 158 4 011 2 831 8 876 4 056 3 053 8 442 4 023 3 325 8 375 3 898 3 635 7 514 3 864 3 857 6 901 3 752 4 695 27 17 7 749 6 447 2 472 7 455 6 531 2 658 7 033 6 294 2 893 6 540 6 045 3 140 6 187 5 898 3 325 5 734 5 001 3 786 19 8 406 5 989 2 633 8 089 5 921 2 843 7 632 5 729 3 091 7 103 5 537 3 424 6 716 5 367 3 560 6 181 ...

Page 54: ...54 ...

Page 55: ...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 56: ...45 17 HORIZONTAL VANE 1 CWE241152C 18 HORIZONTAL VANE 1 CWE241153C 19 CAP FOR DRAIN TRAY COMPLETE 1 CWH521096 20 BACK COVER CHASSIS 1 CWD932162B 21 CONTROL BOARD CASING 1 CWH102334 22 TERMINAL BOARD COMPLETE 1 CWA28C2082J 24 ELECTRONIC CONTROLLER MAIN 1 CWA73C2717 25 ELECTRONIC CONTROLLER POWER 1 CWA744544 26 INDICATOR COMPLETE 1 CWE39C1174 27 INDICATOR HOLDER 1 CWD932817 28 INDICATOR HOLDER 1 CWD...

Page 57: ...57 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 58: ...BE ASSY CAPILLARY TUBE 1 CWT023148 18 3 WAY VALVE GAS 1 CWB011213 19 TERMINAL COVER 1 CWH171012 20 NUT TERMINAL COVER 1 CWH7080300J 21 CAPACITOR FM 5 0MF 440V 3 5MF 440V 1 DS441505NPQB 22 CAPACITOR COMP 60MF 440V 1 DS441606CPNA 23 HOLDER CAPACITOR 1 CWH30071 24 TERMINAL BOARD ASS Y 1 CWA28K1144 25 ELECTRO MAGNETIC SWITCH 1 CWA00192 26 TERMINAL BOARD ASS Y 1 CWA28K224J 27 TERMINAL BOARD ASS Y 1 CWA...

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