Table of Contents
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Service Manual
CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE
CS-A123KE / CU-A123KE
Contents
Features .......................................................... 1
Functions ................................................... 2 - 4
Product Specifications ............................. 5 - 10
Dimensions ............................................ 11 - 12
Refrigeration Cycle Diagram ......................... 13
Block Diagram ............................................... 14
Wiring Diagram .............................................. 15
Operation Details ................................... 16 - 30
Installation Information .......................... 31 - 32
2-way, 3-way Valves .............................. 33 - 39
Servicing Information ............................. 40 - 42
Troubleshooting Guide .......................... 43 - 44
Technical Data ....................................... 45 - 48
Exploded View ................................... 49, 51, 53
Replacement Parts List ..................... 50, 52, 54
Electronic Parts List ....................................... 55
ORDER NO. MAC9902015C2
Room Air Conditioners
© 1999 Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D)
All rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
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Table of Contents
Troubleshooting
Related Manuals for Panasonic CS-A73KE
Summary of Contents for Panasonic CS-A73KE
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Page 1: Table Of Contents
ORDER NO. MAC9902015C2 Service Manual Room Air Conditioners CS-A73KE / CU-A73KE CS-A93KE / CU-A93KE CS-A123KE / CU-A123KE Contents Features ............1 Functions ........... 2 – 4 Product Specifications ......5 – 10 Dimensions ..........11 – 12 Refrigeration Cycle Diagram ......13 Block Diagram .......... -
Page 2: Features
CS-A73KE ! ! ! ! ! WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. -
Page 3: Functions
CS-A73KE Functions Remote Control OFF / ON I TEMP. Operation OFF / ON Room Temperature Setting • Temperature Setting (16°C to 30°C) • Automatic Operation MODE Operation with 2°C higher than Operation Mode Selection standard temperature. • Automatic Operation Mode... - Page 4 CS-A73KE Functions Indoor Unit POWER I Power Switch OFF / ON Random Auto Restart Control • Operation is restarted randomly after power AUTO failure at previous setting mode. OFF / ON Auto Operation Button Anti-Freezing Control • Used when the remote control cannot be •...
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Page 5: Functions
CS-A73KE Functions Outdoor Unit CU-A123KE CU-A73KE, CU-A93KE Compressor Reverse Rotation Deice Control Protection Control • To prevent frosting at outdoor heat • To protect compressor from reverse exchanger. (Only for Heating Operation) rotation when there is a instantaneous • Temperature of outdoor heat exchanger is power failure. -
Page 6: Product Specifications
CS-A73KE Product Specifications CU-A73KE Unit CS-A73KE 2.20 - 2.10 Cooling Capacity Btu/h 7,500 - 7,200 2.45 - 2.40 Heating Capacity 8,360 - 8,200 Btu/h Moisture Removal Pint/h Single Phase Power Source 230 - 220 Cycle TOP VIEW SIDE VIEW OUTLET... - Page 7 CS-A73KE Product Specifications Unit CS-A73KE CU-A73KE Heat Evaporator Description Condenser Exchanger Tube material Copper Copper Fin material Aluminium Aluminium Fin Type Slit Fin Louver Fin Row / Stage (Plate fin configuration, forced draft) 2 × 14 1 × 18 614 × 294 × 25.4 Size (W ×...
- Page 8 CS-A73KE Product Specifications CS-A93KE CU-A93KE Unit 2.80 - 2.70 Cooling Capacity Btu/h 9,550 - 9,200 3.40 - 3.30 Heating Capacity Btu/h 11,590 - 11,250 Moisture Removal Pint/h Phase Single Power Source 230 - 220 Cycle SIDE VIEW TOP VIEW OUTLET...
- Page 9 CS-A73KE Product Specifications CU-A93KE Unit CS-A93KE Description Evaporator Condenser Heat Tube material Copper Copper Exchanger Aluminium Fin material Aluminium Slit Fin Fin Type Louver Fin Row / Stage (Plate fin configuration, forced draft) 2 × 14 1 × 18 Size (W × H × L) 856 ×...
- Page 10 CS-A73KE Product Specifications CS-A123KE CU-A123KE Unit 3.55 - 3.40 Cooling Capacity Btu/h 12,110 - 11,590 4.20 - 4.05 Heating Capacity Btu/h 14,320 - 13,810 Moisture Removal Pint/h Phase Single Power Source 230 - 220 Cycle SIDE VIEW TOP VIEW OUTLET...
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Page 11: Product Specifications
CS-A73KE Product Specifications Unit CS-A123KE CU-A123KE Heat Evaporator Description Condenser Exchanger Tube material Copper Copper Fin material Aluminium Aluminium Fin Type Louver Fin Slit Fin Row / Stage (Plate fin configuration, forced draft) 2 × 14 1 × 20 614 × 294 × 25.4 782.9 ×... -
Page 12: Dimensions
CS-A73KE Dimensions CS-A73KE / CS-A93KE / CS-A123KE Unit : mm <Front View> Air intake direction Air outlet Right piping hole direction Left piping hole <Side View> <Side View> Remote control transmitter <Back View> GAS SIDE LIQUID SIDE TEMP DRAIN PORT POWERFUL Relative position between the indoor unit and the installation plate <Front View>... -
Page 13: Dimensions
CS-A73KE Dimensions CU-A73KE / CU-A93KE 2-way valve at Liquid side (High Pressure) 3-way valve at Gas side (Low Pressure) CU-A123KE Space necessary for installation (52) 10 cm 10 cm 100 cm Anchor Bolt Pitch 323 x 500 2-Way Valve at Liquid side... -
Page 14: Refrigeration Cycle Diagram
CS-A73KE Refrigeration Cycle Diagram CS-A73KE / CU-A73KE CS-A93KE / CU-A93KE CS-A123KE / CU-A123KE INDOOR OUTDOOR CHECK VALVE 2-WAY VALVE INTAKE PIPE TEMP. TEMP. SENSOR SENSOR (T.R.S) PIPE TEMP. SENSOR HEAT EXCHANGER (EVAPORATOR) HEAT EXCHANGER (CONDENSER) 3-WAY VALVE 4-WAY VALVE COMP. -
Page 15: Block Diagram
CS-A73KE Block Diagram – 14 –... -
Page 16: Wiring Diagram
CS-A73KE Wiring Diagram CS-A73KE / CU-A73KE CS-A93KE / CU-A93KE CS-A123KE / CU-A123KE WIRELESS ELECTRONIC DISPLAY LAMP REMOTE CONTROLLER CONTROL (RECEIVER) CN-DISP(W) CN-RCV (W) 220-240V, 50/60Hz POWER SUPPLY CORD REMARKS: : BLUE REMOTE : BROWN CONTROL No. CN-DISP(W) : BLACK ELECTRONIC CONTROLLER... -
Page 17: Operation Details
CS-A73KE Operation Details 1) Cooling Mode Operation Cooling in operation according to Remote Control setting. Time Delay Safety Control (3 minutes) • When the compressor is stopped by Power Switch or Remote Control, it restarts after 3 minutes when the Power Switch or Remote Control is turned ON. - Page 18 CS-A73KE Operation Details 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). Compressor Comp. operates for 50 secs.
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Page 19: Indoor Fan
CS-A73KE Operation Details Cooling Operation Time Diagram a b c d e f g h i j k l m n o p q r s t u v w x y z Operation Intake 1.5K Temperature Stop Set Temp. - Page 20 CS-A73KE Operation Details 2) Soft Dry Mode Operation • The unit starts cooling operation until the room temperature reaches the setting temperature set on the Remote Control, and then Soft Dry operation will start. • During Soft Dry operation, the Indoor Fan will operate and stop at 4-second intervals at low speed.
- Page 21 CS-A73KE Operation Details Soft Dry Operation Time Diagram a b c d e f g h i j k l m n o p q r s t u v Intake Air Temperature Cooling ON 1.5°C Cooling OFF Set Temp.
- Page 22 CS-A73KE Operation Details 3) Heating Mode Operation Heating in operation according to Remote Control setting. Time Delay Safety Control • When the compressor is stopped by Power Switch or Remote Control, it restarts after 3 minutes when the Power Switch or Remote Control is turned ON.
- Page 23 CS-A73KE Operation Details 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. ( C) ( C) Heat...
- Page 24 CS-A73KE Operation Details Deicing Control Deice starts to prevent frosting at outdoor heat exchanger. • Normal Deicing Deice operation 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.
- Page 25 CS-A73KE Operation Details Normal Deicing Time Diagram Indoor 39°C Heat Exchanger 34°C Temp. 30°C (TRS) (OPEN) Outdoor 4°C Heat (CLOSE) Exchanger –3°C Temp. max 12' 10" 20" 10" 20" Basic Time 30" 30" Compressor 4-way Valve SLo Lo - SLo Lo -...
- Page 26 CS-A73KE Operation Details 4) Automatic Mode Operation When the Automatic Mode Operation is selected, the indoor fan operates at Lo -- fan speed for 20 second to sense intake air temperature and determine the 1st operation mode. Standard for Determining Operation Mode 1st Judgement ↑...
- Page 27 CS-A73KE Operation Details 5) Sleep Mode Auto Operation Cooling or Soft Dry Operation Approx. 0.5°C increase When you press the SLEEP Mode, the following movement will start TEMP. to avoid overcooling. Approx. 0.5°C increase Approx. 8 hours after • The fan speed refer to Indoor Fan Motor Control.
- Page 28 CS-A73KE Operation Details 6) Indoor Fan Speed Control Auto Fan Speed Control When set to Auto Fan Speed, the fan speed is shifted automatically between Stop to SHi depend on each operation as shown below. Manual Fan Speed Control Basic fan speed adjustment (3 setting, from Lo to Hi) can be carried out by using the Fan Speed Selection button at the remote control.
- Page 29 CS-A73KE Operation Details * Lo -- : Indoor Fan rotates at 6 seconds ON and 4 seconds OFF * SLo : Indoor Fan rotates at 4 second intervals at Low speed. * RLo : Random Low Speed. Lo, RLo - , RLo -- , Fan Speed is operates randomly.
- Page 30 CS-A73KE Operation Details 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.
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Page 31: Operation Details
CS-A73KE Operation Details 12) Powerful Mode Operation Purpose of this operation is to be obtain the setting temperature quickly. a) Cooling and Soft Dry Mode • When the Powerful Mode is set, the set temperature will be automatically decreased 3°C against the present setting temperature. -
Page 32: Installation Information
CS-A73KE Installation Information Attached accessories Accessories part Qty. Accessories part Qty. Band Installation plate Vinyl tape Installation plate fixing screw Vinyl tape Remote control Battery Drain elbow Air purifying filter Accessories: Flaring piping kit CZ-3F5, 7AEN (CS/CU-A73KE, A93KE) CZ-4F5, 7, 10AN... -
Page 33: Installation Information
CS-A73KE Installation Information Indoor / Outdoor unit installation diagram Length of power supply cord Piping direction Attention not to bend up drain hose (Front side) about 1.1 m about 1.8 m Right Right < < < < rear Left Left... -
Page 34: 2-Way, 3-Way Valves
CS-A73KE 2-way • 3-way Valve 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Flare nut Hexagonal wrench (4 mm) Flare nut Open position Closed position Open position Closed position piping piping connection connection Service port Service port cap... -
Page 35: Evacuation Of Installation
CS-A73KE 1 Evacuation of Installation WHEN INSTALLING AN AIR CONDITIONER, BE If air remain in the indoor unit and refrigeration SURE TO EVACUATE THE AIR INSIDE THE INDOOR pipes, it will affect the compressor, reduce to cool- UNIT AND PIPES in the following procedure. -
Page 36: Pumping Down
CS-A73KE 2 Pumping down (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Closed (Gas side) 3-way valve CLOSE Open Refrigerant Reclaiming Equipment CLOSE Procedure: (1) Confirm that both the 2-way and 3-way valves are (6) Operate the air conditioner at the cooling cycle set to the opened position. - Page 37 CS-A73KE 3 Evacuation of Re-installation WHEN RE-INSTALLING AN AIR CONDITIONER, BE If air remain in the indoor unit and refrigeration SURE TO EVACUATE THE AIR INSIDE THE INDOOR pipes, it will affect the compressor, reduce to cool- ing capacity, and could lead to a malfunction.
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Page 38: Way, 3-Way Valves
CS-A73KE 4 Balance refrigerant of the 2-way, 3-way valves (Lack of refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Open (Gas side) 3-way valve OPEN Open Refrigerant Reclaiming Equipment CLOSE Procedure: (1) Confirm that both the 2-way and 3-way valves are set to the open position. - Page 39 CS-A73KE 5 Evacuation (No refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Open (Gas side) 3-way valve OPEN Open Vacuum pump CLOSE Procedure: (1) Connect the vacuum pump to the charge set’s centre hose. (2) Evacuation for approximately one hour.
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Page 40: Gas Charging
CS-A73KE 6 Gas charging (After Evacuation) (Indoor unit) (Liquid side) (Outdoor unit) 2-way valve Open (Gas side) Check valve 3-way valve Open Charging cylinder OPEN CLOSE Procedure: (1) Connect the charge hose to the charging cyl- This is different from previous procedures. Because inder. -
Page 41: Servicing Information
CS-A73KE Servicing Information Tabs Release hooks Inspection points for the Indoor Electronic Controller Tabs 1. The Electronic Controller, a signal Receiver and an Indicator (Fig. 2) can be seen by the below steps: – Remove the 2 caps and 2 screws at the bottom of the front grille. - Page 42 CS-A73KE Servicing Information – Finally remove the fan motor by removing the To install back the screw. (Fig. 5) Fan motor, Please adjust the – REMINDER - To reinstall the fan motor, adjust connector location. the connector of the fan motor as Figure 5.
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Page 43: Servicing Information
CS-A73KE Servicing Information • Remote Control Reset Reset terminal When the batteries are inserted for the first time, or the batteries are replaced, all the indications will blink and the remote control might not work. If this happens, remove the back cover of the remote... -
Page 44: Troubleshooting Guide
CS-A73KE Troubleshooting Guide Refrigeration cycle system In order to diagnose malfunctions, make sure that Normal Pressure and Outlet Air Temperature (Standard) there are no electrical problems before inspect- Gas pressure Outlet air ing the refrigeration cycle. Such problems include temperature... -
Page 45: Troubleshooting Guide
CS-A73KE Troubleshooting Guide 1. Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Heating Mode Condition of the air Electric Electric Low Pressure High Pressure Low Pressure High Pressure conditioner current during current during... -
Page 46: Technical Data
CS-A73KE Technical Data L L L L L Thermostat characteristics CS-A73KE / CS-A93KE / CS-A123KE • Soft Dry • Cooling (°C) (°C) COMP. ON Cooling ON COMP. OFF = Set Temperature Cooling OFF = Set Temperature, Soft Dry OFF, Soft Dry ON Diff. - Page 47 CS-A73KE Technical Data L L L L L Operation characteristics CS-A73KE / CU-A73KE • Piping Length Characteristic (Cooling) • Cooling Characteristic 220V 220V 230V 230V 0.65 0.70 0.60 0.65 0.55 0.60 0.50 0.55 0.45 0.50 PIPING LENGTH (m) OUTDOOR AIR TEMPERATURE (°C) [Condition] Room temperature: 27/19°C...
- Page 48 CS-A73KE Technical Data L L L L L Operation characteristics CS-A93KE / CU-A93KE • Cooling Characteristic • Piping Length Characteristic (Cooling) 220V 220V 230V 230V 0.65 0.60 0.60 0.55 0.55 0.50 0.50 0.45 0.45 0.40 (220V and 230V) (220V and 230V)
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Page 49: Technical Data
CS-A73KE Technical Data L L L L L Operation characteristics CS-A123KE / CU-A123KE • Cooling Characteristic • Piping Length Characteristic (Cooling) 220V 220V 230V 230V 0.65 0.60 0.55 0.50 0.45 (220V and 230V) (220V and 230V) (220V and 230V) (220V and 230V) OUTDOOR AIR TEMPERATURE (°C) -
Page 50: Exploded View
CS-A73KE Exploded View CS-A73KE / CS-A93KE / CS-A123KE " < > & ( & CS-C73KE (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: Replacement Parts List
CS-A73KE Replacement Parts List <Model: CS-A73KE / CS-A93KE / CS-A123KE> DESCRIPTION & NAME Q’TY CS-A73KE CS-A93KE CS-A123KE REMARKS CHASSY COMPLETE CWD50C338 PARTICULAR PIECE CWD931019 FAN MOTOR CWA92288 CWA92286 CWA92290 LEAD WIRE – FAN MOTOR CWA67C2097 CROSS FLOW FAN CWH02C060 BEARING CWH64K007 SCREW –... - Page 52 CS-A73KE Exploded View CU-A73KE / CU-A93KE > < " & (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. – 51 –...
- Page 53 CS-A73KE Replacement Parts List <Model: CU-A73KE / CU-A93KE> DESCRIPTION & NAME Q’TY CS-A73KE CS-A93KE REMARKS CHASSY ASS’Y CWD50K438F CWD50K456D FAN MOTOR BRACKET CWD54113 SCREW – FAN MOTOR BRACKET CWH4580399 FAN MOTOR CWA95245 SCREW – FAN MOTOR MOUNT CWH55027 PROPELLER FAN CWH00K052 NUT –...
- Page 54 CS-A73KE Exploded View CU-A123KE > < & " (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. – 53 –...
- Page 55 CS-A73KE Replacement Parts List <Model: CU-A123KE> DESCRIPTION & NAME Q’TY CU-A123KE REMARKS CHASSY ASS’Y CWD50K659A FAN MOTOR BRACKET CWD54254 SCREW – FAN MOTOR BRACKET CWH55413 FAN MOTOR CWA95381 SCREW – FAN MOTOR MOUNT CWH55252 COMPRESSOR 2KS224D5CA02 ANTI – VIBRATION BUSHING CWH50055 NUT –...
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Page 56: Electronic Parts List
CS-A73KE Electronic Parts List <Electronic Controller Part No. : CWA741388, CWA741491> SYMBOL DESCRIPTION & NAME PART NO. SOUND GENERATOR A48040 TRANSFORMER A40322 DIODE A541SR154–4 DIODE A54RB501V–40 DIODE A541SS355T DOIDE A54CS1VB20E FUSE FUSE XBA2C20TR0 FUSE HOLDER FUSE HOLDER XCSCW032 INTERGRATED CIRCUIT... - Page 57 CS-A73K/A93K/A123K CS-A73K/A93K/A123K CS-A73K/A93K/A123K CS-A73K/A93K/A123K ELECTRONIC CIRCUIT DIAGRAM • CS-A73KE / CU-A73KE • Fig. 1 Fig. 2 CS-A93KE / CU-A93KE • CS-A123KE / CU-A123KE Senser (Thermistor) Intake Air/ Characteristics Pipe Temp. Data Pipe Temp. Sensor Intake Air Temp. Sensor Intake Air MAIN Temp.
- Page 58 CS-A73K/A93K/A123K CS-A73K/A93K/A123K CS-A73K/A93K/A123K CS-A73K/A93K/A123K How to use electronic circuit diagram ELECTRONIC CIRCUIT DIAGRAM PRINT PATTERN PRINT PATTERN • Before using the circuit diagram, read the following carefully. REMOTE CONTROL INDOOR UNIT PRINTED CIRCUIT BOARD INDOOR UNIT PRINTED CIRCUIT BOARD * Voltage measurement * Indications for capacitor Voltage has been measured with a digital a.