CS-A181KE 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.
CS-A181KE Functions Remote Control OFF / ON I TEMP. Operation OFF / ON Room Temperature Setting • Temperature Setting (16˚C to 30˚C) • Automatic Operation MODE Operation Mode Selection 2˚C lower than standard Standard • Automatic Operation Mode AUTO •...
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CS-A181KE Functions Indoor Unit POWER I Power Switch OFF / ON Auto Restart Control • Operation is restarted after power failure AUTO at previous setting mode. OFF / ON Auto Operation Switch Anti-Freezing Control • Used when the remote control cannot be •...
CS-A181KE Functions Outdoor Unit 2-Way Valve Control 4-Way Valve Control • 2-way valve is ON for 1 minutes after • When the unit is switched to "OFF" during compressor start. Other than this, 2-way Heating operation, 4-way valve stays at valve is OFF.
CS-A181KE Product Specifications Unit CU-A181KE CS-A181KE 5.20 - 5.15 Cooling Capacity Btu/h 17,700 - 17,600 6.20 - 6.05 Heating Capacity Btu/h 21,100 - 20,600 Moisture Removal Pint/h Phase Single Power Source 240 - 220 Cycle OUTLET SIDE VIEW TOP VIEW...
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CS-A181KE Product Specifications Unit CS-A181KE CU-A181KE Heat Evaporator Description Condenser Exchanger Tube material Copper Copper Fin material Aluminium Aluminium Fin Type Slot Fin Corrugated Fin Row / Stage (Plate fin configuration, forced draft) 2 × 14 2 × 26 769.2 Size (W ×...
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CS-A181KE Product Specifications Unit CU-A241KE CS-A241KE 6.45 - 6.40 Cooling Capacity Btu/h 22,000 - 21,800 7.80 - 7.55 Heating Capacity Btu/h 26,600 - 25,700 Moisture Removal Pint/h Phase Single Power Source 240 - 220 Cycle OUTLET SIDE VIEW TOP VIEW...
CS-A181KE Product Specifications Unit CS-A241KE CU-A241KE Heat Evaporator Description Condenser Exchanger Tube material Copper Copper Fin material Aluminium Aluminium Fin Type Slot Fin Corrugated Fin Row / Stage (Plate fin configuration, forced draft) 2 × 14 2 × 26 769.2 Size (W ×...
CS-A181KE Dimensions CS-A181K / CS-A241K <Top View> <Front View> Air intake direction Right piping hole Approx 2,100 Air outlet direction <Side View> Left piping hole Lower piping hole 48.5 Remote control transmitter Installation plate hooks Drain ports Gas side Liquid side Approx.
CS-A181KE Dimensions CU-A181K / CU-A241K Required space for installation 56.3 Air intake direction 10cm 10cm 100cm Anchor bolt pitch 330 x 540 Air outlet direction Slots (12 x 17) Four places 3-way valve at liquid side 3-way valve at gas side...
CS-A181KE 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, Remote Control or there is a power failure, it restarts after 3 minutes when the Power Switch, Remote Control is turned ON or the power supply is resumed.
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CS-A181KE Operation Details Automatic Fan Speed Mode When Automatic Fan Speed is selected at Remote Control during cooling operation. • Fan speed rotates in the range of Hi to Me. • Deodorizing Control. Indoor stop stop stop stop 40" 20"...
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CS-A181KE 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 operates with SLo speed.
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CS-A181KE 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 Set Temp. Cooling OFF 1.0°C...
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CS-A181KE 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, Remote Control or there is a power failure, it restarts after 3 minutes when the Power Switch, Remote Control is turned ON or the power supply is resumed.
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CS-A181KE 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. ° ° Manual Fan Speed Mode...
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CS-A181KE Operation Details Deicing Control Deice starts to prevent frosting at outdoor heat exchanger. • Normal Deicing Deice operation detection commences in Heating operation starts or 60 minutes after previous deice operation. If the outdoor piping temperature drops to –4°C or 50 sec. continuosly during compressor is in operation, deice will start.
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CS-A181KE Operation Details b) Overload Deicing Time Diagram Outdoor 12°C Heat -3°C Exchanger Temp. -4°C 4’ 60’ 60’ Basic Time 12’ 10” 20” Compressor 4-way Valve Indoor Fan Outdoor Fan Operation LED : Blinking <Description of operation> Operation a – i Overload control.
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CS-A181KE 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 sleep shift operation •...
CS-A181KE Operation Details 8) Airflow Direction Control Airflow Direction Auto-Control Horizontal • When set a Airflow Direction Auto-Control with Upper limit remote control, the louver swings up and down as 34° shown in the diagram. • The louver does not swing when the Indoor Fan stops during operation.
CS-A181KE 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 m about 2 m Right Right < < < < rear Left Left...
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CS-A181KE 3-way Valve 3-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Flare nut Hexagonal wrench(4 mm) Open position Flare nut Open position Closed position Closed position piping piping connection connection Service port Service port Service Service port cap...
CS-A181KE 1 Evacuation of Installation When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedure. Required tools: hexagonal wrench, adjustable wrench, The air in the indoor unit and in the piping must be torque wrenches, wrench to hold the purged.
CS-A181KE 2 Pumping down (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Close (Gas side) 3-way valve CLOSE Open Refrigerant Reclaiming Equipment CLOSE Procedure: (1) Confirm that both the 3-way valves are set to the (6) Operate the air conditioner at the cooling cycle open position.
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CS-A181KE 3 Evacuation of Re-installation WHEN RE-INSTALLING AN AIR CONDITIONER, BE If air remains in the indoor unit and refrigeration SURE TO EVACUATE THE AIR INSIDE THE INDOOR pipes, it will affect the compressor, reduce to cooling UNIT AND PIPES in the following procedure.
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CS-A181KE 4 Balance refrigerant of the 3-way valves (Lack of refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Open (Gas side) 3-way valve OPEN Open Refrigerant Reclaiming Equipment OPEN Procedure: (1) Confirm that both the 3-way valves are set to the opened position.
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CS-A181KE 5 Evacuation (No refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Open (Gas side) 3-way valve OPEN Open Vacuum pump OPEN Procedure: (1) Connect the vacuum pump to the charge set’s centre hose. (2) Turn on the vaccuum pump to evacuate the unit.
CS-A181KE 6 Gas charging (After Evacuation) (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Open (Gas side) 3-way valve Check valve CLOSE Open Charging cylinder OPEN Procedure: (5) Mount the valve stem nuts and the service port (1) Connect the charge hose to the charging cylinder.
CS-A181KE Servicing Information (A) Disassembly of the parts (Indoor Unit) Electronic Inspection points for the Indoor Electronic Controller Controller 1. The Electronic Controller, a signal Receiver and an Indicator can be seen by removing the Front Grille and Control Board Cover, as shown in the Fig. 1.
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CS-A181KE Servicing Information 3. Remove the Discharge Grille. Remove the Discharge Grille and then pull the Dis- charge Grille in a down and forward direction. Fig. 4 Fan Motor 4. Remove the Indoor Fan Motor Loosen the Fan Mounting Screw at the junction with Cross Flow Fan.
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CS-A181KE Servicing Information Cross Flow Fan Removal Procedure 1. Remove the Fan Mounting Screws and Bearing. (Refer to No. 4 of Indoor Fan Motor the removal procedure) 2. Loosen the 2 screws mounted at the left side of the evaporator.
CS-A181KE Servicing Information Reset terminal (C) Remote Control Transmission Setting • Remote Control Reset 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.
CS-A181KE 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...
CS-A181KE 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...
CS-A181KE Technical Data L L L L L Thermostat characteristics CS-A181K / CS-A241K • Soft Dry • Cooling (°C) (°C) COMP. ON Cooling ON COMP. OFF = Set Temperature Cooling OFF = Set Temperature Soft Dry OFF, Soft Dry ON Diff.
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CS-A181KE Technical Data L L L L L Operation characteristics CS-A181K / CU-A181K • Piping Length Characteristic (Cooling) • Cooling Characteristic 220V 220V 240V 240V 14.0 13.5 14.0 13.0 12.5 13.5 12.0 13.0 0.46 0.44 0.45 0.43 0.44 0.42 0.43 0.42...
CS-A181KE Electronic Parts List Electronic Controller : CWA741314 (CU-A181KE) Electronic Controller : CWA741315 (CU-A241KE) SYMBOL DESCRIPTION & NAME PART NO. INTEGRATED CIRCUIT A52C78414Y INTEGRATED CIRCUIT A52C094 (A52AN78M12 + A58086) INTEGRATED CIRCUIT A52C040 (A52AN78N05) INTEGRATED CIRCUIT A52MPA2003C TRANSISTOR A55C1740STPQ A55DTC113ZST TRANSISTOR...
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CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K ELECTRONIC CIRCUIT DIAGRAM • CS-A181K / CU-A181K SERIES • CS-A241K / CU-A241K SERIES Fig. 1 AC 220-240V 50Hz SINGLE PHASE TRANSFORMER CWA40C246 ELECTRONIC CIRCUIT TEMPERATURE Senser (Thermistor) POWER FUSE TEMPERATURE SUPPLY 102°C FUSE 113°C SWITCH Characteristics ELECTRONIC CIRCUIT (XH-3) BLUE (VH-2)
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CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K TIMER TABLE How to use electronic circuit diagram ELECTRONIC CIRCUIT DIAGRAM PRINT PATTERN Test mode • REMOTE CONTROL INDOOR UNIT PRINTED CIRCUIT BOARD Before using the circuit diagram, read the following carefully. Name Time Remarks When test point Short-circuited * Voltage measurement * Indications for capacitor...