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13.1. 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 to the right.

13.1.1. Relationship between the condition of the air conditioner and pressure 
and electric current

72

Summary of Contents for CS-A123KR

Page 1: ...73KR CU A73KR CS A93KR CU A93KR CS A123KR CU A123KR 2000 Matsushita Air Conditioning Corp Sdn Bhd 183914D All rights reserved Unauthorized copying and distribution is a violation of law 1 Features High Efficiency Compact Design Comfort Environment 1 ...

Page 2: ...otection Prevent compressor reverse rotation 2 stage OLP to protect compressor Service Improvement Easy fan motor replacement procedure Operation Improvement Economy mode to reduce electrical power consumption Powerful mode to reach the desired room temperature quickly Anti cold draft control Long Installation Piping CS CU A73KR CS CU A93KR long piping up to 10 meter CS CU A123KR long piping up to...

Page 3: ...ooling Capacity kW Btu h 2 11 2 06 7 200 7 020 Heating Capacity kW Btu h 2 30 2 25 7 840 7 670 Moisture Removal l h Pint h 1 4 3 0 Power Source Phase V Cycle Single 240 220 50 Airflow Method OUTLET INTAKE SIDE VIEW TOP VIEW 3 ...

Page 4: ...m3 min cfm Cooling 7 7 272 7 2 250 Heating 8 6 304 8 4 300 Indoor Air SHi m3 min cfm Cooling 8 7 307 8 3 293 Heating 9 7 342 9 6 339 Outdoor Air m3 min cfm 28 8 1 017 27 8 dB A Cooling High 33 32 Low 26 24 Cooling High Heating High 36 35 Low 29 27 Heating High Noise Level Power level dB Cooling High 45 43 Low 37 36 Cooling High Heating High 48 48 Low 41 39 Heating High 4 ...

Page 5: ...15 32 799 30 23 32 Depth inch mm 7 15 32 190 9 21 32 Net Weight lb kg 20 9 0 64 29 0 Compressor Type Rotary 1 cylinder rolling piston Motor Type Induction 2 Rated Output W 550 Air Circulation Type Cross flow Fan Propeller Material AS Glass Fiber 30 AES Glass Fiber Motor Type Induction 4 poles Induction 6 Input W 29 0 27 0 65 8 57 5 Rate Output W 10 20 Fan Speed Low rpm 810 770 Medium rpm 940 890 H...

Page 6: ...l Style c c P P Honeycomb Capacity Control Capillary Tube Compressor Capacitor F VAC 1 5 F 440VAC Fan Motor Capacitor F VAC 1 5 F 400VAC 1 2 F 400VAC Specifications are subject to change without notice for further improvement Unit CS A93KR CU A93KR Cooling Capacity kW Btu h 2 65 2 60 9 040 8 870 Heating Capacity kW Btu h 3 20 3 10 10 900 10 600 Moisture Removal l h Pint h 1 6 3 4 Power Source Phas...

Page 7: ...3 min cfm Cooling 9 4 330 8 9 310 Heating 9 9 350 9 7 340 Indoor Air SHi m3 min cfm Cooling 9 9 349 9 4 332 Heating 10 4 367 10 2 360 Outdoor Air m3 min cfm 28 8 1 017 27 8 dB A Cooling High 39 38 Low 29 26 Cooling High Heating High 39 39 Low 30 27 Heating High Noise Level Power level dB Cooling High 52 50 Low 41 38 Cooling High Heating High 52 52 Low 43 39 Heating High 7 ...

Page 8: ...5 32 799 30 23 32 Depth inch mm 7 15 32 190 9 21 32 Net Weight lb kg 20 9 0 71 32 0 Compressor Type Rotary 1 cylinder rolling piston Motor Type Induction 2 Rated Output W 750 Air Circulation Type Cross flow Fan Propeller Material AS Glass Fiber 30 AES Glass Fiber Motor Type Induction 4 poles Induction 6 Input W 37 0 34 0 65 8 57 5 Rate Output W 14 20 Fan Speed Low rpm 880 770 Medium rpm 1 060 945 ...

Page 9: ...Style c c P P Honeycomb Capacity Control Capillary Tube Compressor Capacitor F VAC 25 F 370VAC Fan Motor Capacitor F VAC 1 5 F 400VAC 1 2 F 400VAC Specifications are subject to change without notice for further improvement Unit CS A123KR CU A123KR Cooling Capacity kW Btu h 3 40 3 40 11 600 11 600 Heating Capacity kW Btu h 4 15 4 05 14 200 13 800 Moisture Removal l h Pint h 2 1 4 4 Power Source Pha...

Page 10: ... min cfm Cooling 9 2 320 8 8 310 Heating 9 7 340 9 5 340 Indoor Air SHi m3 min cfm Cooling 9 6 339 9 5 335 Heating 10 2 360 10 3 364 Outdoor Air m3 min cfm 35 0 1 236 32 8 dB A Cooling High 39 39 Low 35 33 Cooling High Heating High 39 39 Low 34 32 Heating High Noise Level Power level dB Cooling High 52 52 Low 46 44 Cooling High Heating High 52 52 Low 45 43 Heating High 10 ...

Page 11: ...2 799 27 17 32 Depth inch mm 7 15 32 190 11 7 32 Net Weight lb kg 20 9 0 86 39 0 Compressor Type Rotary 1 cylinder rolling piston Motor Type Induction 2 Rated Output W 1 100 Air Circulation Type Cross flow Fan Propeller Material AS Glass Fiber 30 AES Glass Fiber Motor Type Induction 4 poles Induction 6 Input W 35 5 33 0 71 0 67 0 Rate Output W 15 25 Fan Speed Low rpm 1 060 965 Medium rpm 1 150 1 0...

Page 12: ... Length mm Cooling 1 100 470 Flow Rate l min Cooling 6 0 13 4 Inner Diameter mm Cooling 1 3 Heating Air Filter Material Style c c P P Honeycomb Capacity Control Capillary Tube Compressor Capacitor F VAC 30 F 370VAC Fan Motor Capacitor F VAC 1 5 F 400VAC 1 5 F 400VAC Specifications are subject to change without notice for further improvement 4 Dimensions 12 ...

Page 13: ...13 ...

Page 14: ...5 Refrigeration Cycle Diagram 14 ...

Page 15: ...6 Block Diagram 15 ...

Page 16: ...7 Wiring Diagram 16 ...

Page 17: ...REMARKS B BLUE BR BROWN BL BLACK W WHITE R RED O ORANGE P PINK Y G YELLOW GREEN 17 ...

Page 18: ...R CONNECTION CWA95245 CWA95381 BLUE YELLOW 260 5 174 5 YELLOW RED 446 0 331 0 Resistance of Compressor Windings MODEL CU A73KR CU A93KR CU A123KR CONNECTION 2RS122D5AB02 2PS164D3AD02 2KS224D5CA02 C R 5 627 3 429 2 211 C S 12 19 4 763 2 924 8 Operation Details 8 1 Cooling Mode Operation Cooling in operation according to Remote Control setting Time Delay Safety Control 3 minutes When the compressor ...

Page 19: ...r fan motor indoor fan motor are simultaneously started the indoor fan motor will operate 1 6 second later Anti Freezing Control If the temperature of the indoor heat exchanger falls continuously below 2 C for 4 minutes or more the compressor turns off to protect the indoor heat exchanger from freezing The fan speed setting remains the same Compressor will restart again when the indoor heat exchan...

Page 20: ...e is a instantaneous power failure Compressor Protection Control After the compressor starts for 50 seconds but the outdoor fan motor is still OFF the compressor will stop and restart automatically Time Delay Safety Control is valid If the above phenomenon is repeated for 3 times the compressor will stops The above phenomenon is reset when there is a change to heating mode or stopped by Remote Con...

Page 21: ...Cooling Operation Time Diagram 8 2 Soft Dry Mode Operation The unit starts cooling operation until the room temperature reaches the setting temperature set on the Remote Control and 21 ...

Page 22: ...es during Cooling operation Starting Current Control Same as Starting Current Control for Cooling Mode operation Anti Freezing Control Same as Anti Freezing Control for Cooling Mode operation For Soft Dry region 6 minutes waiting is valid during compressor stops Compressor Reverse Rotation Protection Control Same as Compressor Reverse Rotation Protection Control for Cooling Mode Operation For Soft...

Page 23: ...Automatic Fan Speed Mode When Automatic Fan Speed is selected at Remote Control during Soft Dry operation Fan speed rotates at SLo and Lo speed Deodorizing Control Soft Dry Operation Time Diagram 23 ...

Page 24: ...ote Control it restarts after 3 minutes when the Power Switch or Remote Control is turned ON When the setting temperature is reached during heating operation the compressor stops and it will not start for 4 minutes Indoor Fan stops for 1 minutes after 3 minutes compressor stops Then it will operate with Lo fan speed for 40 seconds then change to SLo fan speed 24 ...

Page 25: ...ad Protection Control If the temperature of the indoor heat exchanger rises to 51 C Outdoor Fan stops The Outdoor Fan restarts when the indoor heat exchanger temperature falls to 49 C If the indoor heat exchanger becomes 65 C or more the compressor will stop and restart automatically Time Delay Safety Control 4 minutes waiting Compressor Reverse Rotation Protection Control 25 ...

Page 26: ...ime Delay Safety Control is valid T Indoor heat exchanger temperature intake air temperature This is to protect reverse rotation of the compressor when there is a instantaneous power failure 4 way Valve Control 4 way valve always ON during Heating operation Except Deicing operation When the unit is switched to OFF during Heating operation 4 way valve stay at Heating position for 5 minutes Outdoor ...

Page 27: ...reaches 30 C as diagram shown Hot Start is completed when indoor heat exchanger reaches 39 C Anti Cold Draft Control This operation is to prevent the Cold Draft during Heating mode operation The operation will start when compressor OFF Thermo OFF during Heating operation For the first 30 sec from compressor OFF Thermo OFF Indoor fan speed will operate accordingly to the Indoor heat exchanger tempe...

Page 28: ...peed only Anti Cold Draft Control will stop when Intake temperature set temperature 1 5 C Time Delay Safety Control 4 minutes waiting is valid After 30 minutes time saved control see page 22 Automatic Fan Speed Mode When Automatic Fan Speed is selected at Remote Control during heating operation Fan speed rotates in the range of Me SLo according to the heat exchanger temperature 28 ...

Page 29: ...29 ...

Page 30: ...osting at outdoor heat exchanger Normal Deicing Deice operations detection commences after 30 minutes of Heating operation starts or 60 minutes after previous deice operation If the TRS Thermal Reed Switch senses the outdoor piping temperature drops to 3 C TRS CLOSE or less for 50 sec continuously during compressor is in operation deice will start 30 ...

Page 31: ... starts 2 TRS senses the outdoor piping temperature rises to 4 C TRS OPEN 3 Deicing will not end immediately as time delay Td is valid as shown below Time taken from deicing starts to TRS OPEN T Td seconds T 3 minutes 0 3 minutes T 6 minutes 60 6 minutes T 9 minutes 120 T 9 minutes 180 Once deicing operation starts it will not end for 60 seconds After deicing operation compressor stops for 30 seco...

Page 32: ...Overload Deicing Time Diagram 32 ...

Page 33: ...eration mode 2 Operation mode will be determine again after 1 hour of operation if the room temperature reaches to set temperature and compressor off time is over 7 minutes 30 seconds continuously The present operation mode will be continued if the room temperature does not reach to set temperature Compressor keeps running eventhough after 1 hour from automatic operation mode started 33 ...

Page 34: ...Judgement 25 C Heating Above 25 C 25 C below Automatic Set Temperature Refer 3 as below 3 Automatic Set Temperature For each operation set temperature will automatically set as shown below However it can be selected 2 C higher or 2 C lower from standard set temperature by pressing the Room Temperature Setting button Operation Hi Hi Mode Lo 2 C 0 C 2 C Cooling 27 C 25 C 23 C Soft Dry 24 C 22 C 20 C...

Page 35: ... to Indoor Fan Motor Control The setting temperature will be decrease by 2 C at the start of operation and by 3 C one hour later The operation will stop after 8 hours When using together with the Timer the ON Timer has priority 8 6 Random Auto Restart Control If there is a power failure operation will be automatically restarted after 3 to 51 2 minutes when the power is resumed It will start with p...

Page 36: ... will blink at this time 8 8 Remote Control Signal Receiving Sound Peep sound Long will be heard when Stopping the Air Conditioner using ON OFF switch Stopping the Sleep Mode Stopping the Powerful Mode Stopping the Economy Mode Pep sound Short will be heard for others To switch off the peep sound press the Auto Operation Button continuously for 10 seconds or more Repeat the above if you want to sw...

Page 37: ...ift O Manual O Economy Auto Fan Speed O Sleep Shift O Normal Manual O SOFT Powerful Auto Fan Speed O DRY Economy Sleep Shift O Hi O O O Manual Me O O O Lo O O O Normal Lo O SLo O Auto Fan Speed O O O O HEATING Sleep Shift O A73K Manual O O O O O Powerful Auto Fan Speed O O O O Sleep Shift O Manual O O O O O Economy Auto Fan Speed O O O O Sleep Shift O Hi O O O Manual Me O O O Lo O O Normal Lo O SL...

Page 38: ...rflow Direction Control 1 Vertical Airflow Direction Cooling and Soft Dry Mode The louver swings up and down as shown above The louver does not swing when the Indoor Fan stops during operation 2 Vertical Airflow Direction Heating Mode When the intake air temp reaches 38 C the louver is changed 38 ...

Page 39: ... Direction The left and right airflow direction louvers can be adjusted manually 8 11 Economy Mode Operation Purpose of this operation is to save or reduced electrical power consumption of the room air conditioner However consumer is advised to use Economy Mode operation after the room temperature reaches the desired temperature 1 Cooling and Soft Dry Mode When the Economy Mode is set the set temp...

Page 40: ... change to Auto Air Swing 3 Economy Mode will stop if Economy mode button is pressed again Stopped by ON OFF switch Timer off activates Powerful mode button is pressed Fan Speed control button is pressed Sleep mode button is pressed ON Operating mode is changed 8 12 Powerful Mode Operation Purpose of this operation is to be obtain the setting temperature quickly 1 Cooling and Soft Dry Mode When th...

Page 41: ...re The Fan Speed will shift as shown below Vertical Airflow Direction In Manual setting the vane will automatically shift down 5 C lower than previous setting In Auto setting the vane will automatically shift between upper and lower limit depending on the intake air temperature as Heating Mode Airflow Direction Auto Control However the upper and lower limit will be shifted 5 C downward 3 Powerful ...

Page 42: ...nstalled by all licensed electrician Be sure to use the correct rating of the power plug and main circuit for the model to be installed The caution items stated here must be followed because these important contents are related to safety The meaning of each indication used is as below Incorrect installation due to ignoring of the instruction will cause harm or damage and the seriousness is classif...

Page 43: ...n An independent circuit and single outlet must be used If electrical circuit capacity enough or defect found in electrical work it will cause electrical shock or fire 6 Use the specified cable 1 5 mm2 and connect tightly for indoor outdoor connection Connect and clamp the cable so that no external force will be acted on the terminal If connection or fixing not perfect it will cause heat up or fir...

Page 44: ...all be the place where there is ease for access for the power disconnection case of emergency In some countries permanent connection of this room air conditioner to the supply is prohibited 1 Power supply connection to the receptacle using a power plug Use an approved 16A power plug with earth pin for the connection receptacle 2 Power supply connection to a circuit breaker for the permanent connec...

Page 45: ...all in a height of at least 2 3 m OUTDOOR UNIT 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 spaces indicated by arrows from wall ceiling fence or other obstacles Do not place any obstacles which may cause a shor...

Page 46: ... This illustration is for explanation purposes only The indoor unit will actually face a different way 10 2 INDOOR UNIT 46 ...

Page 47: ...m Connecting cable should be about 750 mm from this line Only for left rear piping For left side piping piping connection for liquid should be here For left side piping piping connection for gas should be here 1 Mount the installation plate on the wall with 6 screws If mounting the unit on the concrete wall Consider using anchor bolts Always mount the installation plate horizontally by aligning th...

Page 48: ...g sleeve to the hole 2 Fix the bushing to the sleeve 3 Cut the sleeve until it extrudes about 15 mm from the wall CAUTION When the wall is hollow please be sure to use the sleeve for tube ass y to prevent dangers caused by mice biting the connecting cable 4 Finish by sealing the sleeve with putty or caulking compound at the final stage 10 2 4 INDOOR UNIT INSTALLATION 1 For the right rear piping 2 ...

Page 49: ...3 For the embedded piping 49 ...

Page 50: ... This can be used for left rear piping and left bottom piping also 50 ...

Page 51: ...nside and outside connecting cable can be connected without removing the front grille 2 Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 3 1 5 mm2 flexible cord type designation H05 RN F or heavier cord 51 ...

Page 52: ...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 with the holder clamper 52 ...

Page 53: ...nut 10 mm 2 When installing at roof please consider strong wind and earthquake Please fasten the installation stand firmly with bolt or nails 10 3 3 CONNECTING THE PIPING 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 piping Connect the piping Align the center of piping and sufficiently...

Page 54: ... 1 Please cut using pipe cutter and then remove the burrs 2 Remove the burrs by using reamer If burrs is not removed gas leakage may be caused Turn the piping and down to avoid the metal powder entering the pipe 3 Please make flare after inserting the flare nut onto the copper pipes 10 3 4 EVACUATION OF THE EQUIPMENT WHEN INSTALLING AND AIR CONDITIONER BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR...

Page 55: ...y valve 6 Tighten the service port caps of the 3 way valve at torque of 18 N 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 If gauge needle does not move from 0 cmHg 0 MPa to 76 cmHg 0 1 MPa in step...

Page 56: ...on portion as mentioned in Indoor Outdoor Unit Installation Diagram Please wrap the insulated piping end to prevent water from going inside the piping 2 If drain hose or connecting piping is in the room where dew may form please increase the insulation by using POLY E FOAM with thickness 6 mm or above CHECK THE DRAINAGE Open front panel and remove air filters Drainage checking can be carried out w...

Page 57: ... connection Is the connecting cable being fixed to terminal board firmly Is the connecting cable being clamped firmly Is the drainage OK Refer to Check the drainage section Is the earth wire connection properly done Is the indoor unit properly hooked to the installation plate Is the power supply voltage complied with rated value Is there any abnormal sound Is the cooling operation normal Is the th...

Page 58: ...stallation and Counter Clockwise Clockwise Push Re installation Operation Open Open Closed With valve cap With valve cap With Pumping down Closed Open Open Transferring Clockwise Counter Clockwise Connected manifold Evacuation Open Open Open Servicing With vacuum Gas charging Open Open Open Servicing With charging cylinder Pressure check Open Servicing Open Open Connected manifold 58 ...

Page 59: ...he compressor reduce to cooling capacity and could lead to a malfunction Procedure 1 Connect a charging hose with a push pin to the Low side of a charging set and the service port of a 3 way valve Be sure to connect the end of the charging hose with the push pin to the service port 2 Connect the centre hose of the charging set to a vacuum pump 3 Turn on the power switch of the vacuum pump and make...

Page 60: ...of 18 N m with a torque wrench 7 Remove the valve caps of the 2 way valve and the 3 way valve Position both of the valves to open using a hexagonal wrench 4 mm 8 Mount the valve caps onto the 2 way and 3 way valves Be sure to check for gas leakage Caution If gauge needle does not move from 0 cmHg to 76 cmHg in step 3 above take the following measures If the leaks stop when the piping connections a...

Page 61: ...nect the charge set to the service port of the 3 way valve Connect the charge hose with the push pin to the Gas service port 4 Air purging of the charge hose Open the low pressure valve on the charge set slightly to purge air from the charge hose 5 Set the 2 way valve to the closed position 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 MPa 0 kg cm2G If t...

Page 62: ...arge set and mount the 2 way and 3 way valve s stem caps and the service port caps Use a torque wrench to tighten the service port cap to a torque of 18 N m Be sure to check for gas leakage 10 Disconnect pipes from indoor unit and outdoor unit 11 3 Evacuation of Re installation WHEN REINSTALLING AN AIR CONDITIONER BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following proced...

Page 63: ...gauge does not move after approximately five minutes BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID GAS LEAKAGE 5 Disconnect the charging hose from the vacuum pump 6 Charge the pipes and indoor unit with gas refrigerant from 3 way valve service port and then discharge the refrigerant until low side gas side gauge needle indicates 0 3 MPa 3 kg cm2 7 Tighten the service port cap at a torque of 18 ...

Page 64: ...air the location of the leak 11 4 Balance refrigerant of the 2 way 3 way valves Lack of refrigerant in the refrigeration cycle Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position 2 Connect the charge set to the 3 way valve s service port Leave the valve on the charge set closed Connect the charge hose with the push pin to the service port 3 Connect the charge set ...

Page 65: ...case it will not be necessary to apply a evacuation Discharge the refrigerant gradually if it is discharged too suddenly the refrigeration oil will also be discharged 5 Turn on refrigerant reclaiming equipment 11 5 Evacuation No refrigerant in the refrigeration cycle Procedure 1 Connect the vacuum pump to the charge set s centre hose 2 Evacuation for approximately one hour Confirm that the gauge n...

Page 66: ...nect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Open the valve Low side on the charge set and charge the system with liquid refrigerant If the system cannot b...

Page 67: ...off the air conditioner before disconnecting the hose 5 Mount the valve stem caps and the service port cap Use torque wrench to tighten the service port cap to a torque of 18 N m Be sure to check for gas leakage 12 Servicing Information Inspection points for the Indoor Electronic Controller 1 The Electronic Controller a signal Receiver and an Indicator Fig 2 can be seen by the below steps Remove t...

Page 68: ...the terminal board Fig 3 Remove the right and left screws Fig 3 Then remove the control board by pressing down the hook at the left and press up the right hook Fig 3 2 Remove the Fan Motor by Release the Fan motor leadwire by pressing the hook at the center of the connector Fig 4 Then remove the particular piece that holding the fan motor by pressing the tab Fig 4 Remove the discharge grille and t...

Page 69: ...as Figure 5 Cross Flow Fan Removal Procedure 1 Remove the control board and the fan motor by referring to the Indoor Fan Motor Removal Procedure 2 Remove the evaporator screw Fig 6 3 Press the particular piece to loosen the evaporator Fig 7 4 Remove the bearing Fig 7 5 Push up the evaporator and take out the cross flow Fan Fig 7 69 ...

Page 70: ...ed for the first time or the batteries are replaced all the indications will blink and the remote control might not work If this happen remove the back cover of the remote control and you will find a resetting terminal and by shorting it with a minus 70 ...

Page 71: ...errors caused by using two remote controls set up the remote control B A switch SW1 The unit is set to A when it is shipped By adding a jumper wire to the remote control side and a carbon resistor 1 4 W 10 k to the indoor printed circuit board it is possible to select from 4 types of transmission codes including one at time of delivery condition 1 13 Troubleshooting Guide 71 ...

Page 72: ... 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 to the right 13 1 1 Relationship between the condition of the air conditioner and pressure and electric current 72 ...

Page 73: ...ation Insufficient refrigerant gas leakage Clogged capillary tube or Strainer Short circuit in the indoor unit Heat radiation deficiency of the outdoor unit Inefficient compression Carry out the measurements of pressure electric current and temperature fifteen minutes after an operation is started 13 1 2 Diagnosis methods of a malfunction of a compressor and 4 way valve 73 ...

Page 74: ...ure becomes almost zero Electric current reaches a high level abnormally and the value exceeds the limit of an ammeter some cases a breaker turns off Locked compressor The compressor is a humming sound Electric current during operation becomes approximately 80 lower than the normal value Insufficient switches of the 4 way valve The temperature different between from the discharge tube to the 4 way...

Page 75: ...75 ...

Page 76: ...61 1 96 1 48 0 65 1 79 1 42 0 70 22 0 C 2 49 1 50 0 57 2 33 1 32 0 62 2 16 1 17 0 66 1 98 1 03 0 71 240V Outdoor Temp C Indoor Wet Bulb Temp 30 35 40 46 TC SHC IP TC SHC IP TC SHC IP TC SHC IP 17 0 C 2 60 2 36 0 89 2 44 2 28 0 96 2 28 2 12 1 03 2 07 1 83 1 11 19 0 C 2 65 0 97 19 5 C 2 89 2 07 0 90 2 70 1 93 0 97 2 52 1 91 1 04 2 31 1 83 1 12 22 0 C 3 21 1 93 0 91 2 99 1 70 0 98 2 78 1 51 1 06 2 54...

Page 77: ...31 3 23 2 45 1 40 2 96 2 35 1 51 22 0 C 4 11 2 48 1 23 3 84 2 18 1 32 3 57 1 94 1 43 3 26 1 70 1 53 220V Outdoor Temp C Indoor Wet Bulb Temp 30 35 40 46 TC SHC IP TC SHC IP TC SHC IP TC SHC IP 17 0 C 3 33 3 03 1 16 3 13 2 92 1 25 2 92 2 72 1 34 2 65 2 35 1 44 19 0 C 3 40 1 26 19 5 C 3 71 2 65 1 17 3 47 2 48 1 26 3 23 2 45 1 35 2 96 2 35 1 45 22 0 C 4 11 2 48 1 18 3 84 2 18 1 27 3 57 1 94 1 37 3 26...

Page 78: ...78 ...

Page 79: ...79 ...

Page 80: ...15 Exploded View 80 ...

Page 81: ... The above exploded view is for the purpose of parts disassembly and replacement The non numbered parts are not kept as standard service parts 16 Replacement Parts List Model CS A73KR CS A93KR CS A123KR 81 ...

Page 82: ...67C2106 19 CAP FOR DRAIN TRAY 1 CWH52C003 20 HORIZONTAL VANE 1 CWE24462 21 CONTROL BOARD 1 CWH10965A CWH10965A 22 POWER SUPPLY CORD 1 CWA20C751 23 SLIDE SWITCH 1 CWA04088 0 24 ELECTRONIC CONTROLLER 1 CWA742209 CWA742210 0 25 RECEIVER 1 CWA74919 0 26 INDICATOR COMPLETE 1 CWA741376 0 27 LEAD WIRE INDICATOR 1 CWA67C2105 28 TERMINAL BOARD 1 CWA28C575 CWA28C576 0 29 INDICATOR HOLDER 1 CWD931018A 30 SEN...

Page 83: ...6 BAG COMPLETE INSTALLATION SCREW 1 CWH82C194 47 AIR PURIFYING FILTER COMPLETE 1 CWD00C111 48 AIR PURIFYING FILTER 2 CWD00220 0 49 REMOTE CONTROL HOLDER 1 CWH36161 Note All parts are supplied from MACC Malaysia Vendor Code 086 O marked parts are recommended to be kept in stock 17 Exploded View 83 ...

Page 84: ...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 18 Replacement Parts List Model CU A73KR CU A93KR 84 ...

Page 85: ...UND PROOF MATERIAL FOR COMPRESSOR 1 CWG30786 CWG302031 21 OVERLOAD PROTECTOR 1 CWA12345 CWA12346 0 22 HOLDER O L P 1 CWH7041200 23 TERMINAL COVER 1 CWH17006 24 NUT TERMINAL COVER 1 CWH7080300 25 CONTROL BOARD 1 CWH10881 26 TERMINAL BOARD ASS Y 1 CWA28K216 27 ELECTROLYTIC CAPACITOR 1 CWA32C045 0 28 ELECTROLYTIC CAPACITOR 1 CWA32C067 0 29 CAPACITOR COMPRESSOR 1 CWA31349 15 F 440V CWA31502 25 F 370V ...

Page 86: ...Exploded View 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 20 Replacement Parts List Model CU A123KR 86 ...

Page 87: ...ER O L P 1 CWH7041200 23 TERMINAL COVER 1 CWH17006 24 NUT TERMINAL COVER 1 CWH7080300 25 TEMPERATURE RELAY 1 CWA14C1001 0 26 CONTROL BOARD 1 CWH10972 27 TERMINAL BOARD ASS Y 1 CWA28K216 28 ELECTROLYTIC CAPACITOR 1 CWA32C045 0 29 TERMINAL BOARD ASS Y 1 CWA4711012 30 CAPACITOR COMPRESSOR 1 CWA31647 30 F 370V 0 31 HOLDER CAPACITOR 1 CWH30057 32 CAPACITOR FAN MOTOR 1 CWA31604 1 5 F 400V 0 33 ELECTROMA...

Page 88: ...RANSISTOR A55DC114EKTX Q2 Q3 TRANSISTOR A55C2412KTX Q4 TRANSISTOR A55D1484K Q5 Q8 TRANSISTOR A55DC143XKTX RY HOT ELECTRO MAGNETIC RELAY A00161 RY PWR ELECTRO MAGNETIC RELAY A00106 RY SHi RY Hi RY M ELECTRO MAGNETIC RELAY A00160 SSR1 SSR2 TYRISTOR A56W2DEH1 5 SW1 SLIDE SWITCH A04085 SW2 SW3 PUSH SWITCH A01059 T1 TRANSFORMER A40366 X1 RESONATOR A45CST4 09MG ZD1 DIODE A54D7 5MT1B ZNR1 ZNR2 ZNR3 DIODE...

Page 89: ...How to use electronic circuit diagram 89 ...

Page 90: ...TIMER TABLE 90 ...

Page 91: ...c ON 10 min 60 sec SOFT DRY 10 min operation Deodorizing Control 40 sec 4 sec Cooling 70 sec 7 sec 20 sec 2 sec 180 sec 18 sec Soft Dry 40 sec 4 sec 360 sec 36 sec Comp Reverse Rotation Detection 5 min 30 sec Comp ON 5 min and above 2 min 0 sec Comp Fan Motor Delay Timer 1 6 sec 0 sec SLo Timer 8 sec 8 sec Test mode Name Time When test point Remarks Short circuited Intake Air Anti Freezing Prevent...

Page 92: ...22 2 PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT BOARD TOP VIEW 92 ...

Page 93: ...22 3 PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT BOARD BOTTOM VIEW 93 ...

Page 94: ... MACC Printed in Malaysia 94 ...

Page 95: ...Timer Setting Hours and minutes setting Clock Setting Current time setting Sleep Mode Operation OFF ON SLEEP Indoor Fan Speed Selection FAN SPEED h j k Low Speed l h j k Medium Speed lll h j k High Speed lllll AUTO FAN Automatic Fan Speed AUTO Automatic Airflow Direction Control MANUAL Airflow Direction Manual Control Airflow Direction Control 24 hour OFF ON Real Timer Setting ON TIMER OFF TIMER T...

Page 96: ... Fan rotates at SLo speed Deodorizing control is available Airflow Direction Control Automatic air swing and manual adjusted by remote control for vertical airflow Manually adjusted by hand for horizontal airflow Operation Mode Heating Cooling Soft Dry and Automatic Mode Time Delay Safety Control Restarting is inhibited for approximately 3 minutes Cooling or 4 minutes Heating 7 Minutes Time Save C...

Page 97: ... Deice Control Overload Protection Control Outdoor fan stops when indoor heat exchanger temperature rises to 51 C and above and restarts when the indoor heat exchanger temperature drops to 49 C and below Compressor stop when indoor heat exchanger temperature reaches 65 C or above Heating Operation Only 4 Way Valve Control When the unit is switched to OFF during Heating Operation 4 way valve stays ...

Page 98: ...denotes an action that is PROHIBITED These symbols with a black background denote actions that are COMPULSORY Warning This sign warns of death or serious injury Caution This sign warns of damage to property Do not install remove and reinstall the unit yourself Improper installation will cause leakage electric shock or fire Please consult an authorized dealer or specialist for the installation work...

Page 99: ...te the unit Do not pull out plug to stop the unit Plug in properly Do not share outlet Do not operate with wet hands Use specified power cord Do not damage or modify the power cord If abnormal condition burnt smell etc occurs switch off and unplug the power supply Do not repair by yourself Do not insert finger or other objects into the indoor or outdoor units ...

Page 100: ... Switch off the unit before cleaning it Do not wash the unit with water Do not use for other purpose such as preservation or etc Do not use any combustible equipment at airflow direction Ventilate the room regularly Do not sit or place anything on the outdoor unit Pay attention as to whether the installation rack is damaged due to long period of usage ...

Page 101: ...ction Louver Horizontal Airflow Direction Louver Manually adjusted Economy Powerful Indicators Economy Green Powerful Orange POWER SLEEP TIMER ECONOMY POWERFUL POWER SLEEP TIMER ECONOMY POWERFUL Front Panel When the front panel is opened POWER SLEEP TIMER ECONOMY POWERFUL Front Panel Air Purifying Filter Air Filters Test Run Button Auto Operation Button Power Switch Tab for Front Panel ...

Page 102: ...3KR Connecting cable Drain Hose Air Intake Vents Rear Piping Air Purifying Filters with deodorizing function POWERFUL TEMP OFF ON COOL AUTO Remote Control Two AAA dry cell batteries or equivalent Air Outlet Vents Air Intake Vents Side Rear Connecting cable Drain Hose Piping Ground Terminal Inside Cover ...

Page 103: ...L AUTO OFF ON Button Powerful Mode Operation Button Operation Display Signal Transmitter Room Temperature Setting Button Operation Display Operation Mode Selection Button Clock Button Economy Mode Operation Button Auto Airflow Direction Button OFF TIMER Button ON TIMER Button Timer Set Button Fan Speed Selection Button Manual Airflow Direction Selection Button Time Setting Button Sleep Mode Operat...

Page 104: ...t to A If one unit is installed Maximum distance 10 m Make sure it is not obstructed OPEN Reset points short to clear the memory Aim at the signal receptor Notes Do not throw or drop Do not get it wet Certain type of flourescent lamps may affect signal reception Consult your dealer Signal receptor Signal received sound One short beep or one long beep ...

Page 105: ...Indoor Unit 1 Connect the power supply cord to an independent power supply POWER SLEEP TIMER ECONOMY POWERFUL 6 Switch on the power switch ON x t OFF 3 Remove the air filters 2 Open the front panel 5 Insert the air filters 4 Insert the air purifying filters Use under the following conditions Unit in C Outdoor DBT 32 16 WBT 23 11 Indoor DBT 43 16 WBT 26 11 Outdoor DBT 30 16 WBT _ _ Indoor DBT 24 5 ...

Page 106: ...tteries Ni Cd Remove the batteries if the unit is not going to be used for a long period lights up PM PM PM Setting the clock About the batteries Set the current time Clock immediately to prevent battery exhaustion flashes lights up lights up Remote Control Inserting batteries AIR SWING TIMER CLOCK 1 2 3 COOL PM MODE ECONOMY FAN SPEED AUTO MANUAL ON OFF SET CANCEL SLEEP OPEN 1 OPEN Slide the cover...

Page 107: ... intervals Operation details Cooling Operation Super Low airflow with 10 mins ON and 6 mins OFF alternately Switch to Soft Dry when setting temperature is reached Setting temperature HI AUTO AUTO LO AUTO 1 Press to select the desired operation mode When pressed the display changes in this order 2 Press to start the operation POWER indicator LED Red on indoor unit will light up Press once more to s...

Page 108: ...ation Press to select Fan speed The display changes in this order Automatic Low Medium High Selecting Vertical Airflow Direction Press AUTO Cooling and Soft Dry The louver swing up and down automatically Heating When the discharge air temperature is low such as at the start of heating operation the air blows at horizontal level As the temperature rises the hot air blows in a downwards direction To...

Page 109: ...e ON Timer is set operation will start before the actual set time This is to allow the room temperature to reach the setting temperature by the setting time Cooling and Soft dry 15 minutes in advance Heating and Automatic 30 minutes in advance Once the ON Timer is set operation will start at the setting time everyday AM ON 4 To set the OFF TIMER Press the OFF TIMER then follow steps 2 and 3 as abo...

Page 110: ...ill go out with the OFF TIMER Set the time at which you will come back with the ON TIMER This will prevent the air conditioner from being left on while you are out and the temperature will be pleasant when you return When you return Set the time at which you will return with the ON TIMER This will make the temperature pleasant when you return and it will prevent the air conditioner from being left...

Page 111: ...or sleep mode movement will start to avoid overcooling Heating operation for sleep mode movement will start to avoid overheating Sleep Mode Operation time is 8 hours When used together with the timer the timer has priority Time Approx 0 5 C increase Setting temperature Temperature Sleep Operation button is pressed Sleep shift operation starts 0 1 hour 1 hour Approx 0 5 C increase Approx 8 hours af...

Page 112: ...icator Orange on indoor unit lights up Powerful mode will operate for 15 minutes only To cancel this operation press once more Powerful operation Cooling Soft Dry Airflow volume Low on and off Low on and off Temperature 3 C lower than set temp 3 C higher than set temp Economy operation Temperature 0 5 C higher than set temp 0 5 C lower than set temp Airflow volume Super High Automatic The changes ...

Page 113: ...vironment clean the filters every two weeks continuous use of this dirty filters will reduce cooling efficiency Switch OFF and unplug the power cord before cleaning the air conditioner Caution 4 If badly soiled wash it with soap or a mild household detergent Cleaning the Indoor Unit and Remote Control Wipe gently with a soft dry cloth Do not clean with water hotter than 40 C or with polishing flui...

Page 114: ...light may discolor or deform the panel POWER SLEEP TIMER ECONOMY POWERFUL Removing the front panel Fixing the front panel Cleaning the front panel Fulcrum Caution Do not leave water on the panel after cleaning Dry thoroughly to prevent electric shock Stand on a level surface when removing the front panel Do not touch the metal parts in the indoor unit after removing the front panel Protruding port...

Page 115: ...ing filters Caution Be careful not to hurt your hands on metal parts Once every 3 month Do not reuse dirty filters Consult the nearest authorized dealer Air Purifying filter No CZ SF5N These filters function effectively for not more than three months If the air conditioner operates with dirty filters Air is not purified Cooling capacity decreases Foul odours are emitted 1 Raise the front panel to ...

Page 116: ...f Time 1To dry the internal parts of the indoor unit operate the unit for 2 3 hours using Fan operation 2Turn off the power switch and remove the power supply plug Note If the unit is not switched off by the remote control it will start operating when you plug in because a Auto Restart Control is provided 3Remove the remote control batteries Recommended Inspection The unit will become dirty after ...

Page 117: ...e airflow from the air conditioner cools the room air Q A sound like water flowing can be heard A This is the sound of refrigerant flowing inside the air conditioner unit Normal Operation Q Is it okay A This is the answer Q The room has a peculiar odour A This may be a damp smell emitted by the walls carpet furniture or clothing in the room Ssshh Q During heating operation indoor fan may run at on...

Page 118: ... Is the front grille closed properly Switches or buttons do not operate properly The circuit breaker switches off frequently Abnormal noise is heard during operation Water leaks from the indoor unit Abnormal Operation Call the Dealer Immediately If the following conditions occur immediately turn the power switch to t OFF and unplug The air conditioner does not cool effectively Has the temperature ...

Page 119: ...er a power failure the operation will restart automatically after 3 51 2 minutes Operation will be automatically restart under the previous operation mode and airflow direction when power is resumed as the operation is not stopped by remote control Timer Setting When power failure occurs the timer setting is cancelled Once power is resumed reset the timer Thunder and Lightning Whenever there is li...

Page 120: ...her Cooling operation or 2 C lower Heating operation than actually desired Approximately 10 of electricity costs can be saved Keep All Doors and Windows Closed Otherwise cooling and heating performance will be reduced and electricity costs is wasted Outdoor Unit Do not block the air outlet vents Otherwise it will lower the cooling or heating performance Air Filter and Air Purifying Filter Clean th...

Page 121: ...mergency Caution DISCONNECT THE MAINS PLUG FROM THE SUPPLY SOCKET WHEN NOT IN USE WHERE SUPPLY CONNECTION IS VIA MAINS PLUG IMPORTANT 1 WHEN THE POWER CORD IS CONNECTED TO THE MAINS THROUGH A MULTI POLAR SWITCH THERE MUST BE A MULTI POLAR SWITCH DISCONNECTING MEANS WITH A MINIMUM 3 mm CONTACT GAP IN THE FIXED INSTALLATION CIRCUIT 2 WHEN THE POWER PLUG IS CONNECTED TO THE RECEPTACLE The wires in th...

Page 122: ...1 16V 10µ C15 15k R26 R27 20k C16 10µ 16V PH3 PH302C 330 0 01µ 0 01µ FO VCC2 OUT VCC1 GND CO IN IN 47µ 6 3V 137k 5 6 7 8 4 3 2 1 CN RCV 2 CN DISP 8 7 6 5 4 3 2 1 CN TH 1 2 3 4 MAIN GRN ORG ORG ORG RED R29 0 01µ C17 TEST R8 1k R9 10k C22 10µ 0 01µ C23 16V BZ1 BZ 1k R23 b e 2 2k R22 D1 RY PWR ERA15 01 c R21 6 2k 2SD148 4X Q4 AIR SWING MOTOR RY PWR DRIVE Fig 1 REMOTE CONTROL NO SHORT SHORT OFF ON ON ...

Page 123: ... 36 37 38 39 40 41 42 43 44 45 46 47 48 29 28 27 26 25 30 P50 P51 P52 P53 P54 P55 P56 P57 Vss0 VDD0 P30 P31 P32 P33 P34 P35 P47 P46 P45 P44 P43 P42 P41 P40 P67 P66 P65 P64 BUZ P74 P73 TO50 P71 P70 P03 P02 INTP1 INTP0 Vss X1 X2 IC XT1 XT2 RESET AVdc AVref ANI0 330 R39 R38 330 330 R36 R37 330 R35 330 10k R41 R45 10k A55DC143XKTX RELAY DRIVE RELAY DRIVE c b e 10k 4 7k Q5 A55DC143XKTX Q6 4 7k 10k e b ...

Page 124: ...RELAY DRIVE A55DC143XKTX GENERATION RESET SIGNAL RESET SIGNAL GENERATION 113 C A56W2DEH1 5 BLACK BLUE ERZ TCEAK471 CT1 CWA40322 TERMINAL COMPRESSOR TRADE MARK BLUE RED YELLOW TRS BLACK MOTOR FAN WHITE REVERSING VALVE COIL ELECTROLYTIC CAPACITOR BLACK BLACK BLACK MAGNETIC RELAY B RELAY A MAGNETIC GRAY GRAY RED BROWN 6 7 8 2 4 7 6 4 2 8 YELLOW CAPACITOR RED BLUE BLUE BLUE COMPRESSOR CAPACITOR WHITE ...

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