1. Safety Precautions • Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing. • Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed. •...
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WARNING 19. During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.).
10. Installation Instruction 10.1 Select the Best Location 10.1.1 Indoor Unit 10.1.3 Indoor/Outdoor Unit Installation • Do not install the unit in excessive oil fume area Diagram such as kitchen, workshop and etc. • There should not be any heat source or steam near the unit.
10.2 Indoor Unit 10.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent it from the vibration. Dimension Model YC12*** 485 mm 82 mm 165 mm 158 mm 43 mm 95 mm YC18***, 585 mm 83 mm 165 mm...
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10.2.3 Indoor Unit Installation 10.2.3.1 For the right rear piping 10.2.3.2 For the right and right bottom piping 10.2.3.3 For the embedded piping (This can be used for left rear piping and bottom piping also.)
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10.2.4 Connect the Cable to the Indoor Unit Install the indoor unit on the installing holder that mounted on the wall. Remove front grille by loosening the screw. Remove metal cover without damaging alluminium foil. Cable connection to the power supply through Isolating Devices (Disconnecting means).
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Remove the tapes and connect the power supply cord and connecting cable between indoor unit and outdoor unit according to the diagram below. Secure the power supply cord and connection cable onto the control board with the holder. 10 Fix back metal cover to original position without damaging alluminium foil. Ensure metal cover is fitted at both end.
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10.2.5.1 Cutting and flaring the piping Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs are not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. Please make flare after inserting the flare nut onto the copper pipes.
10.3 Outdoor Unit 10.3.1 Install the Outdoor Unit • After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10mm). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
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FOR ENVIRONMENT PROTECTION, MANUFACTURER STRONGLY RECOMMENDS TO USE EVACUATION METHOD. 10.3.3 Evacuation of the Equipment Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve. Be sure to connect the end of the charging hose with the push pin to the service port. Connect the center hose of the charging set to a vacuum pump.
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10.3.4 Air Purging of the Piping and Indoor The remaining air in the Refrigerant cycle which contains moisture may cause malfunction on the compressor. Remove the caps from the 2-way and 3-way valves. Remove the service-port cap from the 3-way valves. To open the valve, turn the valve stem of 2-way valve counter-clockwise approx.
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10.3.6 Piping Insulation Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap the insulated piping end to prevent water from going inside the piping. 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 6mm or above.
11. Operation and Control 11.1 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.
11.2 Indoor Fan Speed Control • Indoor Fan Speed can be set using remote control. 11.2.1 Fan Speed Rotation Chart Speed Fan Speed (rpm) YC12MK YC18MK YC24MK 1120 1280 1390 1200 1240 H Lo 1180 1210 C Lo 1120 1150 S Lo 11.2.2 Automatic Fan Speed Control •...
11.2.3 Manual Fan Speed Control • Manual fan speed adjustment can be carried out by using the Fan Speed selection button at the remote control. • There are 3 types of fan speed settings: Lo, Me, Hi. 11.2.4 Indoor Fan Motor RPM Abnormal Control •...
11.5 Horizontal Airflow Direction Control • The horizontal airflow direction louvers can be adjusted manually by hand. 11.6 Timer Control 11.6.1 To Set the Timer • To turn ON the unit at a preset time, set the timer while the unit is OFF (the operation will start 15 minutes early before the preset time).
12. Protection Control 12.1 Restart Control (Time Delay Safety Control) • When the thermo-off temperature (temperature which compressor stops to operate) is reached during: - Cooling operation - the compressor stops for 3 minutes (minimum) before resume operation. • If the operation is stopped by the remote control, the compressor will not turn on within 3 minutes from the moment operation stop, although the unit is turn on again within the period.
12.6 Compressor Reverse Rotation Protection Control • If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake air and indoor heat exchanger is 2.5°C or less for continuous 2 minutes, compressor will stop and restart automatically.
13. Servicing Mode 13.1 Auto OFF/ON Button OPERATION MODE The operation will be activated immediately once the AUTO OFF/ON button is pressed. This operation can be used to operate air conditioner with limited function if remote control is misplaced or malfunctioned. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE) The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5 seconds.
14. Troubleshooting Guide 14.1 Refrigeration Cycle System In order to diagnose malfunctions, ensure the air conditioner is free from 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.
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14.1.1 Relationship between the Condition of the Air Conditioner and Pressure and Electric Current Cooling Mode Condition of the air conditioner Low Pressure High Pressure Electric current during operation Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer Short circuit in the indoor unit Heat radiation deficiency of the outdoor unit Inefficient compression...
15. Disassembly and Assembly Instructions WARNING High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 15.1 CS-YC12MK 15.1.1 Small Air Filter, Indoor Electronic Controllers and Control Board Removal Procedures...
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15.1.2 Indoor Fan Motor and Cross Flow Fan Removal Procedures...
17. Exploded View and Replacement Parts List 17.1 Indoor Unit 17.1.1 CS-YC12MKF 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.
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REF. NO. PART NAME & DESCRIPTION QTY. CS-YC12MKF REMARK CHASSIS COMPLETE CWD50C1653 FAN MOTOR CWA921447 CROSS FLOW FAN COMPLETE CWH02C1076 SCREW - CROSS FLOW FAN CWH551146 BEARING ASS’Y CWH64K007 EVAPORATOR CWB30C3328 FLARE NUT (LIQUID) CWT251026 FLARE NUT (GAS) CWT251062 HOLDER SENSOR...
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17.1.2 CS-YC18MKF CS-YC24MKF 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.
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REF. NO. PART NAME & DESCRIPTION QTY. CS-YC18MKF CS-YC24MKF REMARK CHASSIS COMPLETE CWD50C1654 ← FAN MOTOR ARW7628AC ARW7627AC CROSS FLOW FAN COMPLETE CWH02C1077 ← SCREW - CROSS FLOW FAN CWH551146 ← BEARING ASS’Y CWH64K007 ← EVAPORATOR CWB30C3126 CWB30C3125 FLARE NUT (LIQUID) CWT251026 ←...
17.2 Outdoor Unit 17.2.1 CU-YC12MKF 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.
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REF. NO. PART NAME & DESCRIPTION CU-YC12MKF REMARK CHASSIS ASS’Y CWD50K2088 SOUND PROOF MATERIAL CWG302110 FAN MOTOR BRACKET CWD541030 SCREW - FAN MOTOR BRACKET CWH551217 FAN MOTOR CWA951676 SCREW - FAN MOTOR MOUNT CWH55406J PROPELLER FAN ASS’Y CWH03K1006 NUT - PROPELLER FAN CWH56053J COMPRESSOR 2KS210D5AA06...
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17.2.2 CU-YC18MKF 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.
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REF. NO. PART NAME & DESCRIPTION CU-YC18MKF REMARK CHASSIS ASS’Y CWD50K2088 FAN MOTOR BRACKET CWD541030B SCREW - FAN MOTOR BRACKET CWH551217 FAN MOTOR CWA951676 SCREW - FAN MOTOR MOUNT CWH55406J PROPELLER FAN ASS’Y CWH03K1006 NUT - PROPELLER FAN CWH56053J COMPRESSOR 2KS324D5AB06 ANTI - VIBRATION BUSHING CWH50055...
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17.2.3 CU-YC24MKF 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.
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REF. NO. PART NAME & DESCRIPTION CU-YC24MKF REMARK CHASSIS ASS’Y CWD52K1248 SOUND PROOF MATERIAL CWG302221 FAN MOTOR BRACKET CWD541154 SCREW - FAN MOTOR BRACKET CWH551217 FAN MOTOR CWA951689 SCREW - FAN MOTOR MOUNT CWH55252J PROPELLER FAN ASS’Y CWH03K1017 NUT - PROPELLER FAN CWH561038J COMPRESSOR 2JS438D3CB04...