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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20. During pump down operation, stop the compressor before remove the refrigerant piping. (Removal of refrigeration piping while compressor is operating and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.) 21.
10.1.3 Indoor/Outdoor Unit Installation 10. Installation Instruction Diagram 10.1 Select the Best Location 10.1.1 Indoor Unit Do not install the unit in excessive oil fume area 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. The center of installation plate should be at more than 1 at right and left of the wall. The distance from installation plate edge to ceiling should more than 2.
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10.2.3 Indoor Unit Installation 10.2.3.1 For the right rear piping 10.2.3.3 For the embedded piping 10.2.3.2 For the right and right bottom piping...
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(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 The inside and outside connection cable can be connected without removing the front grille. Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 x 1.5 mm2 (746~1119W(1.0 ~1.5HP)) or 4 x 2.5 mm2 (1492~1865W (2.0~2.5HP)) flexible cord, type designation 245 IEC 57 or heavier cord.
10.2.5 Wire Stripping And Connecting Requirement 10.3 Outdoor Unit 10.3.1 Install the Outdoor Unit After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). When installing at roof, please consider strong wind and earthquake.
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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 Connect the cable to the Outdoor Unit Remove the control board cover from the unit by loosening the screw. Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 x 1.5mm2 (746 ~ 1119W (1.0 ~ 1.5HP)) or 4 x 2.5 mm2 (1492 ~ 1865W (2.0~2.5HP)) flexible cord, type designation 245 IEC 57 or heavier cord.
11. Operation Control 11.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.
11.2 Indoor Fan Motor Operation 11.2.1 Basic Rotation Speed Manual Fan Speed Fan motor’s number of rotation is determined according to remote control setting. Remote control ○ ○ ○ ○ ○ Auto Fan Speed According to room temperature and setting temperature, indoor fan speed is determined automatically. The indoor fan will operate according to pattern below.
11.4 Airflow Direction There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes). Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).
11.5.2 OFF Timer Control OFF timer can be set using remote control, where the unit with timer set will stop at set OFF time. Notes: By pressing ON/OFF operation button, the ON Timer or OFF Timer setting will not be cancelled. To cancel the previous timer setting, press CANCEL button.
12. Protection Control 12.1 Restart Control (Time Delay Safety Control) The compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by pressing OFF/ON button at remote control within this period. ...
12.5 Low Pressure Prevention Control (Gas Leakage Detection) Control start conditions For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A. During Cooling and Soft Dry operation: Indoor suction temperature – indoor piping temperature is below 4°C ...
12.10 Cooling Overload Control Pipe temperature limitation / restriction. Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor operation frequency) The compressor stops if outdoor pipe temperature exceeds 61°C. If the compressor stops 4 times in 20 minutes, Timer LED blinks (“F95” indicated: Outdoor high pressure rise protection) 12.11 Freeze Prevention Control ...
13. Servicing Mode 13.1 Auto Off/On Button Auto OFF/ON Auto OFF/ON Button Pressed Button Pressed 5 sec Auto Operation Test Run Operation Stop (Forced Cooling Operation) AUTO OPERATION MODE The Auto 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 malfunction.
13.2 Remote Control Button 13.2.1 SET Button To check remote control transmission code and store the transmission code to EEPROM Press “Set” button for more than 10 seconds by using pointer Press “Timer Set” button unit a “beep” sound is heard as confirmation of transmission code change. 13.2.2 RESET (RC) Button ...
14. Troubleshooting Guide 14.1 Refrigeration Cycle System In order to diagnose malfunctions, ensure the air conditioner is free Normal Pressure and Outlet Air Temperature (Standard) from electrical problems before inspecting the refrigeration cycle. Gas Pressure Outlet air Temperature Such problems include insufficient insulation, problem with the (kg/cm (°C) power source, malfunction of a compressor and a fan.
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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 ...
14.2 Breakdown Self Diagnosis Function 14.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code) Once error occurred during operation, the unit will stop its operation, and Timer LED blinks. Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will ON again.
14.4 Troubleshooting Flowchart 14.4.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused Faulty indoor unit PCB.
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14.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) Malfunction Decision Conditions During startup, error code appears when different types of indoor and outdoor units are interconnected. Malfunction Caused Wrong models interconnected. Wrong indoor unit or outdoor unit PCBs mounted. ...
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14.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. ...
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14.4.4 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. Faulty sensor.
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14.4.5 H16 (Outdoor Current Transformer Open Circuit) Malfunction Decision Conditions A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (less than 1.14A) for continuously 20 seconds. Malfunction Caused ...
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14.4.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm) Malfunction Caused ...
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14.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. ...
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14.4.8 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. ...
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14.4.9 H28 (Outdoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. ...
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14.4.10 H33 (Unspecified Voltage between Indoor and Outdoor) Malfunction Decision Conditions The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused Wrong models interconnected. Wrong indoor unit and outdoor unit PCBs used. Indoor unit or outdoor unit PCB defective.
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14.4.11 H98 (Indoor High Pressure Protection) Error Code will not display (no Timer LED blinking) but store in EEPROM Malfunction Decision Conditions During heating operation, the temperature detected by the indoor pipe temperature sensor is above 60°C. Malfunction Caused ...
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14.4.12 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Malfunction Decision Conditions Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C) Malfunction Caused Clogged air filter of the indoor unit Dust accumulation on the indoor unit heat exchanger ...
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14.4.13 F11 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above 45°C. Malfunction Caused Faulty connector connection. Faulty indoor pipe temperature sensor. Faulty indoor main PCB.
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14.4.14 F90 (Power Factor Correction Protection) Malfunction Decision Conditions During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit main PCB senses abnormal high DC voltage level. Malfunction Caused DC voltage peak due to power supply surge.
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14.4.15 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions During cooling, compressor frequency = Fcmax. During cooling and heating operation, running current: 0.65A < I < 1.65A. During cooling, indoor intake - indoor pipe < 4°C. Malfunction Caused ...
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14.4.16 F93 (Compressor Rotation Failure) Malfunction Decision Conditions A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused Compressor terminal disconnect Outdoor PCB malfunction Troubleshooting...
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14.4.17 F95 (Cooling High Pressure Abnormality) Malfunction Decision Conditions During operation of cooling, when outdoor unit heat exchanger high temperature data (61°C) is detected by the outdoor pipe temperature sensor. Malfunction Caused Outdoor pipe temperature rise due to short circuit of hot discharge air flow. ...
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14.4.18 F96 (IPM Overheating) Malfunction Decision Conditions During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature sensor. Malfunction Caused IPM overheats due to short circuit of hot discharge air flow. IPM overheats due to defective of outdoor fan motor.
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14.4.19 F97 (Compressor Overheating) Malfunction Decision Conditions During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the compressor tank temperature sensor. Malfunction Caused Refrigerant shortage (refrigerant leakage). 2/3 way valve closed. Detection error due to faulty compressor tank temperature sensor.
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14.4.20 F98 (Input Over Current Detection) Malfunction Decision Conditions During cooling and heating operation, when an input over-current (X value in Total Running Current Control) is detected by checking the input current value being detected by current transformer (CT) with the compressor running. Malfunction Caused ...
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14.4.21 F99 (Output Over Current Detection) Malfunction Decision Conditions During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that flows in the inverter DC peak sensing circuitry. Malfunction Caused DC peak due to compressor failure. ...
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-YS9MKV-7 CS-YS12MKV-7 15.1.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.1.1.1...
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Detach 3 connectors as labeled from Pull out the main the electronic controller. Then pull out electronic controller main controller gently and power CN-Data electronic controller halfway. Remove screw to CN-TH remove terminal board complete. CN-STM1 Detach the Earth wire Detach the CN-DISP screw.
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15.1.4 To remove control board 13. Remove 4 screws holding the control board then pull out the control board. Figure 7 15.1.5 To remove cross flow fan and indoor fan motor 14. Remove the screw that holding the cross flow fan and fan motor axis.
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17. Push the holdfast to the left and lift up the evaporator. Evaporator 18. Remove the cross flow fan from the unit by 19. Fan motor can be removed after the pulling it to the left and downward. removal of cross flow fan. Reminder: To reinstall the fan motor, adjust the fan motor connector to 45°...
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. 15.2 CS-YS18MKV-7 CS-YS22MKV-7 15.2.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.2.1.1 To remove front grille...
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15.2.3 To remove power electronic controller Figure 14 Figure 15 Figure 16...
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15.2.4 To remove discharge grille Figure 17 15.2.5 To remove control board Figure 18 15.2.6 To remove cross flow fan and indoor fan motor Figure 19...
17. Exploded View and Replacement Parts List 17.1 Indoor Unit 17.1.1 CS-YS9MKV-7 CS-YS12MKV-7 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 CS-YS9MKV-7 CS-YS12MKV-7 REMARK CHASSY COMPLETE CWD50C1653 ← FAN MOTOR CWA921443 ← CROSS-FLOW FAN COMPLETE CWH02C1076 ← BEARING ASSY CWH64K007 ← SCREW - CROSS-FLOW FAN CWH551146 ← EVAPORATOR CWB30C2961 CWB30C3362 FLARE NUT (LIQUID) CWT251030 ←...
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17.1.2 CS-YS18MKV-7 CS-YS22MKV-7 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 CS-YS18MKV-7 CS-YS22MKV-7 REMARK CHASSY COMPLETE CWD50C1623 ← FAN MOTOR ARW7628AC ← CROSS FLOW FAN COMPLETE CWH02C1077 ← BEARING ASS’Y CWH64K007 ← SCREW - CROSS FLOW FAN CWH551146 ← EVAPORATOR CWB30C2584 CWB30C3217 FLARE NUT (LIQUID) CWT251030 ←...
17.2 Outdoor Unit 17.2.1 CU-YS9MKV-7 Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service part.
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REF. NO. PART NAME & DESCRIPTION CU-YS9MKV-7 REMARK CHASSY ASSY CWD50K2107 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RS092XCE21 NUT - COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302478 SOUND PROOF MATERIAL CWG302532 FAN MOTOR BRACKET CWD541074 FAN MOTOR CWA951604 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55252J...
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17.2.2 CU-YS12MKV-7 CU-YS18MKV-7 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-YS12MKV-7 REMARK CHASSY ASSY CWD50K2071 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RS092XCD21 NUT - COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302436 SOUND PROOF MATERIAL CWG302431 FAN MOTOR BRACKET CWD541030 FAN MOTOR CWA951466 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55406J...
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REF. NO. PART NAME & DESCRIPTION CU-YS18MKV-7 REMARK CHASSY ASS’Y CWD50K2071 ANTI-VIBRATION BUSHING CWH50077 COMPRESSOR 5CS130XAD04 NUT-COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302302 FAN MOTOR BRACKET CWD541089 FAN MOTOR ARW44W8P40AC SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55252J PROPELLER FAN ASSY CWH03K1014...
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17.2.3 CU-YS22MKV-7 Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service part.
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REF. NO. PART NAME & DESCRIPTION CU-YS22MKV-7 REMARK CHASSY ASS’Y CWD50K2194 ANTI-VIBRATION BUSHING CWH50077 COMPRESSOR 5CS130XAD04 NUT-COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302302 FAN MOTOR BRACKET CWD541065 FAN MOTOR CWA951605 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55252J PROPELLER FAN ASSY CWH03K1017...