CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.5. Operation Control 12.4. Auto OFF/ON Button 8.6. Indoor Fan Speed Control 12.5. Remote Control Reset 8.7. Outdoor Fan Speed Control 13 Troubleshooting Guide 8.8. Vertical Airflow Direction Control 13.1. Refrigeration Cycle System 8.9. Horizontal Airflow Direction Control 13.2.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 2.2. Indoor Unit AUTO OFF / ON Automatic Operation Button Random Auto Restart Control • Unit will be restarted, when resume from power • Press for < 5 second to operate Automatic failure, at previous setting.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 3 Product Specifications 3.1. CS-A9DKA CU-A9DKA Unit Indoor Unit Outdoor Unit Power Source (Phase, Voltage, Cycle) ø, V, Hz Single, 220, 50 Cooling Capacity kW (BTU/h) 2.65 (9,040) Heating Capacity kW (BTU/h) 2.80 (9,550)
Page 7
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / Unit Indoor Unit Outdoor Unit Fan Motor Description Cross-flow Fan Propeller Fan Material AS + Glass Fiber 20% PP Resin Type Induction (4-poles) Induction (6-poles) Input 60.5 66 - 74.8 Rated Output Fan Speed Low Cooling;...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 3.2. CS-A12DKA CU-A12DKA Unit Indoor Unit Outdoor Unit Power Source (Phase, Voltage, Cycle) ø, V, Hz Single, 220 , 50 Cooling Capacity kW (BTU/h) 3.52 (12,000) Heating Capacity kW (BTU/h) 3.90 (13,300 ) Moisture Removal l/h (Pint/h) 2.0 (4.2)
Page 9
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / Unit Indoor Unit Outdoor Unit Fan Motor Description Cross-flow Fan Propeller Fan Material AS + Glass Fiber 20% PP Resin Motor Type Induction (4-poles) Induction (6-poles) Input 60.5 71.5 - 80.3 Rated Output Fan Speed Low Cooling;...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8 Operation Details 8.1. Heating Operation • Heating operation can be set using remote control. • This operation is applied to warm the room temperature reaches the setting temperature set on the remote control.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.2. Cooling Operation • Cooling operation can be set using remote control. • This operation is applied to cool down 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.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.3. Soft Dry Operation • Soft Dry operation can be set using remote control. • Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room. • This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.4. Automatic Operation • Automatic operation can be set using remote control. • This operation starts to operate with indoor fan at SLo speed for 25 seconds to judge the intake air temperature. • After judged the temperature, the operation mode is determined by referring to the below standard.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / • The operation mode judging temperature and standard setting temperature can be increased by 2°C permanently, by open the circuit of JX1 at indoor electronic controller. 8.5. Operation Control 8.5.1. Restart Control (Time Delay Safety Control) •...
Page 22
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / (For 8.5.3. to 8.5.7. information applies only to Cooling and Soft Dry Operation) 8.5.3. 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 compressor ON temperature (A) and compressor OFF temperature (B) during the period.
Page 23
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / (For 8.5.8. to 8.5.14. information applies only to Heating Operation) 8.5.7. Anti-Dew Formation 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: −...
Page 24
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.5.9. Compressor Overload Protection Control Outdoor Fan 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.
Page 25
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.5.12. Hot Start Control • Hot Start Control is to prevent cool air discharge into the room when heating operation start. • When Heating operation starts, Indoor fan will not start until the indoor heat exchanger reaches 30°C as diagram shown.
Page 26
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.5.14. Deicing Control Deice starts to prevent frosting 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.
Page 27
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / Normal Deicing Time Diagram Overload Deicing Time Diagram...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.6. Indoor Fan Speed Control • Indoor Fan Speed can be set using remote control. 8.6.1. Fan Speed Rotation Chart Fan Speed (rpm) CS-A9DKA CS-A12DKA S Hi 1270 1310 1160 1280 1120 H Lo...
Page 29
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / • Auto Fan Speed during cooling operation: 1. Indoor fan will rotate alternately between off and on as shown in below diagram. 2. At the beginning of each compressor start operation, indoor fan will increase fan speed gradually for deodorizing purpose.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / • Auto Fan Speed during Heating operation. 1. Indoor fan will rotate in the range of SLo → Me according to the heat exchanger temperature. 8.6.3. Manual Fan Speed Control • Manual fan speed adjustment can be carried out by using the Fan Speed selection button at the remote control.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / (Heating Operation condition) Heating Operation • 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.
Page 32
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / • Vertical Airflow Direction:- − In “Manual” setting, the vane will automatically shift down 5° 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.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.11. Quiet Operation • The Quiet operation is to provide quiet cooling/heating operation condition compare to normal operation. (Cooling and Soft Dry Operation condition) • Once the Quiet Mode is set at the remote control, Quiet Mode LED illuminates. The sound level will reduce either around 2 dB(A) for Lo fan speed or 3 dB(A) for Hi/Me fan speed against the present sound level operation.
Page 34
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / (Heating Operation condition) • When the Quiet Mode is set at the remote control, Quiet Mode LED illuminates. The sound level will reduce either around 2 dB (Lo) or 3 dB (Hi, Me), against the present sound level operation.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.12. Ionizer Operation • The Ionizer operation is to provide fresh air effect to user by producing minus ion in discharge air. 8.12.1. Operation Control 1. Ionizer individual operation a. When air-conditioner unit is at “OFF” condition (standby) and ION operation button at the remote control is pressed, the Ionizer and indoor fan operations will turn on.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 8.12.2. Error Detection Control • The error detection control is to inform user that error occurs at ionizer system and repairing job will be needed. • There are two types of error detection control: a.
Page 44
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 1. The equipment must be earthed. It may cause electrical shock if grounding is not perfect. 2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fire.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 10.2. Attached accessories 10.4. Indoor/Outdoor Unit Installation Diagram Applicable piping kit CZ-3F5, 7AEN (C7DK, C9DK, A7DK, A9DK, RS-C7DK, RS- C9DK) CZ-4F5,7, 10AN (C12DK, A12DK) 10.3. Select the best location INDOOR UNIT • There should not be any heat source or steam near the unit.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 10.5. Indoor unit 10.5.1. SELECT THE BEST LOCATION 10.5.3. TO DRILL A HOLE IN THE WALL (Refer to “Select the best location” AND INSTALL A SLEEVE OF section) PIPING 1. Insert the piping sleeve to the hole.
Page 47
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 3. For the embedded piping (This can be used for left rear piping & left bottom piping also.)
Page 48
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 10.5.5. CONNECT THE CABLE TO THE INDOOR UNIT INSTALLATION OF SUPER ALLERU-BUSTER FILTER 1. The inside and outside connecting cable can be connected 1. Open the front panel. without removing the front grille. 2. Remove the air filters.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 3. Slide down the 2 caps on the front grille as shown in the 10.6. Outdoor unit illustration at right, and then remove the 2 mounting screws. 10.6.1. SELECT THE BEST LOCATION Pull the lower section of the front grille towards you to remove the front grille.
Page 50
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / burrs from cut edge. Make flare after inserting the flare nut (located at valve) onto the copper pipe. Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.
Page 51
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 10.6.5. CONNECT THE CABLE TO THE OUTDOOR UNIT 1. Remove the control board cover from the unit by loosening the screw. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 3 × 1.5 mm flexible cord, type designation 245 IEC 57 or heavier cord.
Page 52
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / CHECK ITEMS Is there any gas leakage at flare nut connections? Has the heat insulation been carried out at flare nut 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”...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 11 2-way, 3-way Valve 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Works Shaft Position Shaft Position Service Port Shipping Close Close Close (With valve cap) (With valve cap) (With cap) Evacuation Close Close...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 11.1. Air Purging of the Piping and Indoor Unit 11.1.1. Air purging (Installation) Required tools: hexagonal wrench, adjustable wrench, torque The air in the indoor unit and in the piping must be purged. If air wrenches, wrench to hold the joints and gas leak detector.
Page 55
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 11.1.2. Pumping down (Re-installation) Procedure: 1. Confirm that both the 2-way and 3-way valves are set to 5. Set the 2-way valve to the close position. the opened position. • Remove the valve stem caps and confirm that the valve 6.
Page 56
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 11.1.3. Re-air purging (Re-installation) Procedure: 1. Confirm that both the 2-way and 3-way valves are set to 5. Discharge the refrigerant. the closed position. • Close the valve on the charging cylinder and discharge the refrigerant until the gauge indicates 3 to 5 kg/cm (0.3 to 0.5 MPa)
Page 57
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 11.1.4. Balance refrigerant of the 2-way, 3-way valves (Gas leakage) 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.
Page 58
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 11.1.5. Evacuation (Installation) (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 needle has moved toward -0.1 MPa (-76 cmHg) [vacuum of 4 mmHg or less.]...
Page 59
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 11.1.6. Gas charging (After Evacuation) Procedure: 1. Connect the charge hose to the charging cylinder. This is different from previous procedures. Because you are • Connect the charge hose which you disconnected from charging with liquid refrigerant from the gas side, absolutely do...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 12 Servicing Information 12.1. Distinction Of Lead Free (PbF) Printed Circuit Board • Printed circuit boards (manufactured) using lead free solder will have a PbF stamp on the Printed Circuit board. CAUTION • Pb free solder has a higher melting point than standard solder; typically the melting point is 50 - 70°F (30 - 40°C) higher.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / Fig. 5 Fig. 4 − Press the hook to the right then take out the PCB. (Fig. − To remove the electronic controller. − Release CN-FM connectors. (Fig. 4) − Release Ry-Pwr connector (black and brown) and Ac- −...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / − Release the generator complete wire (green and red). (Fig. 8) − Remove 2 screws on the right and 1 screw at the left side of the control board. (Fig. 7) − Press down the hook on the left side of control board.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / − 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. 12.4.2. Select Remote Control Transmission Code • There are 4 types 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 transmission code from remote control.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 13 Troubleshooting Guide 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.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 13.2. Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current Cooling Mode Heating Mode Condition of the air conditoner Low Pressure High Pressure Electric current Low Pressure High Pressure Electric current...
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 15 Exploded View (Indoor Unit) 15.1. CS-A9DKA CS-A12DKA 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.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 17 Exploded View (Outdoor Unit) 17.1. CU-A9DKA 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.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 17.2. CU-A12DKA 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.
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / 18 Replacement Parts List (Outdoor Unit) <Model: CU-A9DKA> REF. NO. PART NAME & DESCRIPTION QTY. CU-A9DKA REMARKS CHASSY ASS’Y CWD50K2112 SOUND PROOF MATERIAL CWG302255 FAN MOTOR BRACKET CWD541073 SCREW - FAN MOTOR BRACKET CWH551060...
Page 74
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / <Model: CU-A12DKA> REF. NO. PART NAME & DESCRIPTION QTY. CU-A12DKA REMARKS CHASSY ASS’Y CWD50K2074 SOUND PROOF MATERIAL CWG302110 FAN MOTOR BRACKET CWD541030 SCREW - FAN MOTOR BRACKET CWH551059 FAN MOTOR CWA951117 SCREW - FAN MOTOR MOUNT CWH55406 PROPELLER FAN ASS’Y...
Page 80
CS-A9DKA CU-A9DKA / CS-A12DKA CU-A12DKA / How to use electronic circuit diagram TIMER TABLE Test Mode Name Time (When test point Remarks Short-circuited) Real Timer 1 hr. 1 min. 10 min. 10 sec. 1 min. 1 sec. Time Delay Safety Control 2 min.