Panasonic CS-A18CKPG Service Manual
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Panasonic CS-A18CKPG Service Manual

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Order No. MAC0211071C1
E25
Room Air Conditioner
CS-A18CKPG CU-A18CKP6G
●
© 2002 Matsushita Industrial Corp. Sdn. Bhd. (11969-T). All rights reserved. Unauthorized copying and distribution is a
violation of law.
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  • Page 1 Service Manual TOP NEXT Order No. MAC0211071C1 Room Air Conditioner CS-A18CKPG CU-A18CKP6G ● © 2002 Matsushita Industrial Corp. Sdn. Bhd. (11969-T). All rights reserved. Unauthorized copying and distribution is a violation of law. TOP NEXT...
  • Page 2 1 Features TOP PREVIOUS NEXT High Efficiency ● Compact Design ● Comfort Environment ● 8 hours of sleep mode operation Air filter with function to reduce dust and smoke Wider range of horizontal discharge air New Automatic air swing and manual adjusted by remote control for horizontal airflow. Auto Restart ●...
  • Page 3 Overload protector Noise prevention during soft dry operation. Anti-dew Formation Control (Cooling & Soft Dry) Overload Protection Control (Heating) Outdoor Fan Control ■ Compressor High Pressure Control ■ Blue Coated Condenser High resistance to corrosion. ■ Low outdoor ambient temperature control. Operation Improvement ●...
  • Page 4 2 Functions TOP PREVIOUS NEXT TOP PREVIOUS NEXT...
  • Page 5 Remote Control Self illuminating button OFF / ON I TEMP. Operation OFF / ON Room Temperature Setting Heating, Cooling, Soft Dry Operation. MODE • Temperature Setting (16°C to 30°C) Operation Mode Selection Automatic Operation • Automatic Operation Mode AUTO • Operation with 2°C higher than •...
  • Page 6 Indoor Unit AUTO OFF / ON Automatic Operation Button Sleep Mode Auto Control • Press for < 5s to operate Automatic • Indoor Fan operates refer to Indoor Fan operation mode. Speed control. (Used when the remote control cannot be used.) •...
  • Page 7 Outdoor Unit Compressor Reverse Rotation Deice Control Protection Control • To prevent frosting at outdoor heat exchanger during Heating Operation. • To protect compressor from reverse rotation when there is a instantaneous power failure. 4-Way Valve Control • When the unit is switched to “OFF” Overload Protector during Heating Operation, 4-way valve stays at Heating position for 5 minutes.

  • Page 8: Product Specifications

    3 Product Specifications TOP PREVIOUS NEXT Unit CS-A18CK CU-A18CK Power Source Phase, Voltage, Single, 230 - 208, 60 Hz Cycle Cooling Capacity kW (BTU/h) 5.00 - 4.95 (17,000 - 16,900) Heating Capacity kW (BTU/h) 5.36 - 5.30 (18,300 - 18,100) Moisture Removal l/h (Pint/h) 1.9 (4.0)
  • Page 9 Running Current Cooling; 7.9 - 8.5 Heating; 7.9 - 8.5 BTU/hW Cooling; 9.7 - 9.8 BTU/hW Heating; 10.4 - 10.5 Starting Current 47.0 Piping Connection Port(Flare piping) inchinch G ; Half Union 1/2 L ; Half Union G ; 3-way valve 1/2 L ; 3-way valve Pipe Size(Flare piping) inchinch G ;...
  • Page 10 Compressor Capacitor μF, VAC 40 μF, 370VAC Fan Motor Capacitor μF, VAC 3.0 μF, 450VAC Note: Specifications are subject to change without notice for further improvement. ● (1) - CS-A18CKPG-4/CU-A18CKP6G-4 (USA). ● (2) - CS-A18CKPG-5/CU-A18CKP6G-5 (Canada). ● TOP PREVIOUS NEXT...
  • Page 11 4 Dimensions TOP PREVIOUS NEXT...
  • Page 12 TOP PREVIOUS NEXT...

  • Page 13: Refrigeration Cycle Diagram

    5 Refrigeration Cycle Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 14: Block Diagram

    6 Block Diagram TOP PREVIOUS NEXT...
  • Page 15 TOP PREVIOUS NEXT...

  • Page 16: Wiring Diagram

    7 Wiring Diagram TOP PREVIOUS NEXT...
  • Page 17 TOP PREVIOUS NEXT...

  • Page 18: Operation Details

    8 Operation Details TOP PREVIOUS NEXT 8.1 Cooling Mode Operation 8.2 Soft Dry Mode Operation 8.3 Heating Mode Operation 8.4 Automatic Mode Operation 8.5 Sleep Mode Auto Operation 8.6 Random Auto Restart Control 8.7 Indoor Fan Speed Control 8.8 Airflow Direction Control 8.9 Delay ON Timer Control 8.10 Remote Control Signal Receiving Sound 8.11 Economy Mode Operation...

  • Page 19: Cooling Mode Operation

    8.1 Cooling Mode Operation TOP PREVIOUS NEXT Cooling in operation according to Remote Control setting. Time Delay Safety Control (3 minutes) When the compressor is stopped by Remote Control, it restarts after 3 minutes when the ● Remote Control is turned ON. When the setting temperature is reached during cooling operation, the compressor stops and it ●...
  • Page 20 difference between intake air and indoor heat exchanger is 2.5°C or less for 2 minutes, compressor will stop and restart automatically. (TimeDelay Safety Control is valid) &utrif; T = Intake air temperature - Indoor heat exchanger temperature This is to protect reverse rotation of the compressor when there is a instantaneous power failure. Anti-Dew Formation Control Purpose is to prevent dew formation on indoor unit air discharge area.
  • Page 21 Cooling Operation Time Diagram TOP PREVIOUS NEXT...

  • Page 22: Soft Dry Mode Operation

    8.2 Soft Dry Mode Operation TOP PREVIOUS NEXT 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 at SLo speed. ●...
  • Page 23 Soft Dry Operation Time Diagram TOP PREVIOUS NEXT...

  • Page 24: Heating Mode Operation

    8.3 Heating Mode Operation TOP PREVIOUS NEXT 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.
  • Page 25 4-way Valve Control 4-way valve ON during Heating operation, except deicing operation. ● When the unit is switched to OFF during Heating operation, 4-way valve stays at Heating ● position for 5 minutes. Hot Start Control When Heating operation starts, Indoor Fan will not start until the indoor heat exchanger reaches 30°C as diagram shown.
  • Page 26 Anti Cold Draft Control Heating Operation Time Diagram...
  • Page 27 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 for 50 sec. continuously during compressor is in operation, deice will start.
  • Page 28 After deicing operation, compressor stops for 30 seconds and 4-way valve stays at cooling ● position for 10 seconds. a) Normal Deicing Time Diagram (b) Overload Deicing Time Diagram...
  • Page 29 TOP PREVIOUS NEXT...

  • Page 30: Automatic Mode Operation

    8.4 Automatic Mode Operation TOP PREVIOUS NEXT 1. When the Automatic Mode Operation is selected, the indoor fan operates at SLo fan speed for 25 seconds to sense intake air temperature and determine the 1st operation mode. If indoor intake air temperatureis less than 16°C, Heating mode will immediate operate. 2.
  • Page 31 3. Automatic Set Temperature For each operation, set temperature will automatically set as shown below. However it can be selected 2°C higher or 2°C lower from standard set temperature by pressing the Room Temperature Setting button. Operation (Standard) (+2°C) (±0°C) (-2°C) Cooling 27°C...

  • Page 32: Sleep Mode Auto Operation

    8.5 Sleep Mode Auto Operation TOP PREVIOUS NEXT Cooling or Soft Dry Operation Purpose is to obtain a comfortable room temperature while sleeping. When you press the SLEEP Mode, the following movement will start to avoid overcooling. Sleep shift operation starts, when the room temperature reaches the setting temperature or after ●...
  • Page 33 TOP PREVIOUS NEXT...

  • Page 34: Random Auto Restart Control

    8.6 Random Auto Restart Control TOP PREVIOUS NEXT If there is a power failure, operation will be automatically restarted after 3 to 4 minutes when ● the power is resumed. It will start with previous operation mode and airflow direction. Restart time is decided randomly using 4 parameter:- ●...

  • Page 35: Indoor Fan Speed Control

    8.7 Indoor Fan Speed Control TOP PREVIOUS NEXT Auto Fan Speed Control ● When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table. Manual Fan Speed Control ● Basic fan speed adjustment (3 settings, from Lo to Hi) can be carried out by using the Fan Speed selection button at the remote control.

  • Page 36: Airflow Direction Control

    8.8 Airflow Direction Control TOP PREVIOUS NEXT Vertical Airflow Direction Auto-Control When set a Airflow Direction Auto-Control with remote control, the louver swings up and ● down as shown in the diagram. The louver does not swing when the Indoor Fan Motor stops during operation at the upper ●...
  • Page 37 mode. Horizontal Airflow Direction Auto-Control When set a Airflow Direction Auto-Control with remote control, the vanes swings left and ● right as shown in the diagram. The vanes does not swing when the Indoor Fan Motor stops during operation at 22° angle. ●...
  • Page 38 The louver can be adjusted by pressing the button to the desired vane position. When the remote control is used to stop the operation, the vanes is reset, and stopped at reset ● position. During Anti-dew condensation prevention, Airflow Direction Manual control angle change ●...

  • Page 39: Delay On Timer Control

    8.9 Delay ON Timer Control TOP PREVIOUS NEXT When the Delayed ON Timer is set by using the remote control, the unit will start operate ● slightly before the set time, so that the room will reach nearly to the set temperature by the desired time.

  • Page 40: Remote Control Signal Receiving Sound

    8.10 Remote Control Signal Receiving Sound TOP PREVIOUS NEXT Long beep sound will be heard when:- ● Stopping the Air Conditioner using ON/OFF switch. Stopping the Sleep Mode. Stopping the Powerful Mode. Stopping the Economy Mode. Short beep sound will be heard for others. ●...

  • Page 41: Economy Mode Operation

    8.11 Economy Mode Operation TOP PREVIOUS NEXT 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. Cooling and Soft Dry Mode When the Economy Mode is set, the set temperature will be automatically increased 0.5°C against the present setting temperature.
  • Page 42 In Manual or Auto setting, the vane will automatically change to Auto Air Swing. Economy Mode will stop if: Economy mode button is pressed again. Stopped by ON / OFF switch. Timer-off activates. Powerful mode button is pressed. Fan Speed control button is pressed. Sleep mode button is pressed ON.

  • Page 43: Powerful Mode Operation

    8.12 Powerful Mode Operation TOP PREVIOUS NEXT Purpose of this operation is to be obtain the setting temperature quickly. 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. This operation automatically will be running under SHi Fan Speed (Cooling), SLo Fan Speed (Soft Dry).
  • Page 44 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. However the upper and lower limit will be shifted 5°Cdownward.
  • Page 45 8.13 Low outdoor ambient temperature control TOP PREVIOUS NEXT A. Purpose To protect air conditioner from damage under the low outdoor ambient temperature. (Low outdoor ambient temperature < -12°C). B. During low outdoor ambient temperature control activated, other compressor & outdoor fan motor control is ignored.
  • Page 46 Note: # : Fan motor off condition depends on: a. 1 min over after FM ON. And b. Air temperature < -3°C during 1 min. So the FM Off time is between 5 sec. to 1 min. 5 sec. D. Indoor condition during protection control #1: I/D fan speed and protection control depends on the operation mode.
  • Page 47 Soft dry Cooling zone Setting speed Compressor reverse rotation protection Soft dry zone S Lo Compressor reverse rotation protection Heating Speed depends on I/D piping temperature Automatic Depends on mode judgement. #1 TOP PREVIOUS NEXT...
  • Page 48 9 Operating Instructions TOP PREVIOUS NEXT TOP PREVIOUS NEXT...
  • Page 49 SAFETY PRECAUTIONS I Installation Precautions I Operation Precautions Before operating, please read the following “Safety Precautions” carefully. Warning Warning G To prevent personal injury, injury to others and This sign warns of death or serious injury. property damage, the following instructions must be G Do not install, remove and reinstall the unit by followed.
  • Page 50 G How to Insert the Batteries NAME OF EACH PART I Remote Control 1 Signal Transmitter 2 Operation Display 3 Powerful Mode Operation Button 4 Room Temperature Setting Button (Illuminating button) AUTO HEAT COOL COOL AUTO 5 Operation Mode Selection Button AUTO AUTO 6 Economy Mode Operation Button...

  • Page 51: Convenience Operation

    I Setting the Fan Speed I Setting the Horizontal Airflow Direction G Operation Details • Press 4 to select:- • Press 6 to select:- – Low Fan Speed COOL – Cooling Operation – Medium Fan Speed • To set the room temperature at your preference Indoor –...

  • Page 52: Care And Maintenance

    CARE AND MAINTENANCE I Pre-season Inspection I Cleaning the Indoor Unit and Remote I Air Purifying Filters Control G Is the discharged air cold/warm? • Wipe gently with a soft, dry cloth. Operation is normal if 15 minutes after the start of •...

  • Page 53: Troubleshooting

    If the following conditions occur, turn off the circuit breaker, Is it okay? This is the answer and then call your authorized Panasonic dealers or servicenter. • Air conditioner has been restarted, but does not • This is to protect the air conditioner. Wait until the air operate for 3 minutes.

  • Page 54: Installation Instructions

    10 Installation Instructions TOP PREVIOUS NEXT Required tools for Installation Works 1. Philips screw driver 5. Spanner Gas leak detector 13. Multimeter 2. Level gauge 6. Pipe cutter 10. Measuring tape 14. Torque wrench18 N.m (1.8 kgf.m) 55 N.m (5.5 kgf.m) 65 N.m (6.5 kgf.m) 3.
  • Page 55 TOP PREVIOUS NEXT...

  • Page 56: Safety Precautions

    10.1 Safety Precautions TOP PREVIOUS NEXT Read the following SAFETY PRECAUTIONS carefully before installation. ● Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of ● the power plug and main circuit for the model to be installed. The caution items stated here must be followed because these important contents are related to ●...
  • Page 57 5. For electrical work, follow the local national wiring standard, regulation and this installation instruction. An independent circuit and single outlet must be used. If electrical circuit capacity isnot enough or defect found in electrical work, it will cause electrical shock or fire.
  • Page 58 Applicable piping kit CZ-4F5, 7, 10AN (CS-A18CKPG) SELECT THE BEST LOCATION INDOOR UNIT There should not be any heat source or steam near the unit. ● There should not be any obstacles blocking the air circulation. ● A place where air circulation in the room is good.
  • Page 59 If piping length is over 24.6ft (7.5m), additional refrigerant should be added as shown in the ● table. Example: For CS-A18CKPG If the unit will be installed at a 10m distance, the quantity of additional refrigerant should be 50g...(10 - 7.5)m × 20g/m = 50g...
  • Page 60 This illustration is for explanation purposes only. ● The indoor unit will actually face a different way. TOP PREVIOUS NEXT...
  • Page 61 10.2 INDOOR UNIT TOP PREVIOUS NEXT 10.2.1 SELECT THE BEST LOCATION(Refer toSelect the best location section) 10.2.2 HOW TO FIX INSTALLATION PLATE 10.2.3 TO DRILL A HOLE IN THE WALL AND INSTALL A SLEEVE OF PIPING 10.2.4 INDOOR UNIT INSTALLATION 10.2.5 INDOOR UNIT ELECTRICAL WIRING TOP PREVIOUS NEXT...

  • Page 62: Select The Best Location

    10.2.1 SELECT THE BEST LOCATION (Refer toSelect the best location section) TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 63: How To Fix Installation Plate

    10.2.2 HOW TO FIX INSTALLATION PLATE TOP PREVIOUS NEXT The mounting wall is strong and solid enough to prevent it from the vibration. The centre of installation plate should be at more than 550 mm at right and left of the wall. The distance from installation plate edge to ceiling should more than 67 mm.
  • Page 64 Drill the piping hole at either the right or the left and the hole should be slightly slanted to the outdoor side. TOP PREVIOUS NEXT...
  • Page 65 10.2.3 TO DRILL A HOLE IN THE WALL AND INSTALL A SLEEVE OF PIPING TOP PREVIOUS NEXT 1. Insert the piping sleeve to the hole. 2. Fix the bushing to the sleeve. 3. Cut the sleeve until it extrudes about 15 mm from the wall. Caution When the wall is hollow, please be sure to use the sleeve for tube assy to prevent dangers caused by mice biting the connecting cable.
  • Page 66 10.2.4 INDOOR UNIT INSTALLATION TOP PREVIOUS NEXT For the right rear piping For the embedded piping...
  • Page 67 (This can be used for left rear piping & left bottom piping also.)
  • Page 68 TOP PREVIOUS NEXT...
  • Page 69 10.2.5 INDOOR UNIT ELECTRICAL WIRING TOP PREVIOUS NEXT 1. Remove the control board metal cover. 2. Unscrew the conduit cover & fix the conduit connector to conduit cover with lock nut, then secure it against chassis. 3. Connecting between indoor unit and outdoor unit should be UL listed or CSA approved 6 × AWG16 wire.
  • Page 70 4. Secure the wire onto the control board with the holder (clamper). 5. After completed wiring connection, fix back the metal cover to the original location. INSTALLATION OF AIR PURIFYING FILTERS 1. Open the front panel. 2. Remove the air filters. 3.
  • Page 71 AUTO SWITCH OPERATION The below operations will be performed by pressing the AUTO switch. 1. AUTO OPERATION MODE The Auto operation will be activated immediately once the Auto Switch is pressed. 2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE) The Test Run operation will be activated if the Auto Switch is pressed continuously for more than 5 sec.

  • Page 72: Outdoor Unit

    10.3 OUTDOOR UNIT TOP PREVIOUS NEXT 10.3.1 SELECT THE BEST LOCATION(Refer toSelect the best location section) 10.3.2 INSTALL THE OUTDOOR UNIT 10.3.3 CONNECTING THE PIPING 10.3.4 EVACUATION OF THE EQUIPMENT 10.3.5 OUTDOOR UNIT ELECTRICAL WIRING 10.3.6 PIPE INSULATION TOP PREVIOUS NEXT...
  • Page 73 10.3.1 SELECT THE BEST LOCATION (Refer toSelect the best location section) TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 74: Install The Outdoor Unit

    10.3.2 INSTALL THE OUTDOOR UNIT TOP PREVIOUS NEXT After selecting the best location, start installation according to Indoor/Outdoor Unit Installation ● Diagram. 1. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut. (ø10 mm). 2. When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.

  • Page 75: Connecting The Piping

    MODEL Piping size (Torque) Liquid CS-A18CKPG 1/2 (55 N.m) 1/4 (18 N.m) Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (located at valve) onto the copper pipe.
  • Page 76 TOP PREVIOUS NEXT...

  • Page 77: Evacuation Of The Equipment

    10.3.4 EVACUATION OF THE EQUIPMENT TOP PREVIOUS NEXT WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 1. Connect a charging hose with a push pin to the Low and High side of a charging set and the service port of the 3-way valve.
  • Page 78 to OPEN using a hexagonal wrench (4 mm). 8. Mount valve caps onto the 2-way valve and the 3-way valve. Be sure to check for gas leakage. CAUTION If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 3 above take the following measure: ●...
  • Page 79 10.3.5 OUTDOOR UNIT ELECTRICAL WIRING TOP PREVIOUS NEXT 1. Remove Top Panel. 2. Remove Control Board Cover. 3. Remove Plugs. 4. Fix the conduit connector to the conduit hole with lock-nut, then secure it. 5. Connecting wire between indoor unit and outdoor unit should be UL listed or CSA approved 6 ×...
  • Page 80 Note: Secure the wires onto the control board with the holder (clamper). 8. After completed wiring connection, fix back the control board cover and the top panel to the original position with the screws. TOP PREVIOUS NEXT...

  • Page 81: Pipe Insulation

    10.3.6 PIPE INSULATION TOP PREVIOUS NEXT 1. 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. 2. 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 6 mm or above.
  • Page 82 EVALUATION OF THE PERFORMANCE Operate the unit at cooling operation mode for fifteen minutes or more. ● Measure the temperature of the intake and discharge air. ● Ensure the difference between the intake temperature and the discharge is more than 8°C. ●...
  • Page 83 TOP PREVIOUS NEXT...

  • Page 84: 11 3-Way Valve

    11 3-way Valve TOP PREVIOUS NEXT 3-way Valve (Liquid Side) 3-way Valve (Gas Side) Works Shaft Position Service Port Shaft Position Service Port Shipping Closed Closed Closed Close (With valve cap) (With cap) (With valve cap) (With cap) (Installation and Closed Open Closed...
  • Page 85 Gas charging Open Open Open Open (Servicing) (Counter-clockwise) (Connected manifold gauge) (Counter-clockwise) (Connected manifold gauge) Pressure check Open Closed Open Open (Servicing) (Counter-clockwise) (With cap) (Counter-clockwise) (Connected manifold gauge) Gas releasing Open Open Open Open (Servicing) (Counter-clockwise) (Connected manifold gauge) (Counter-clockwise) (Connected manifold gauge) 11.1 Air Purging of the Piping and Indoor Unit 11.1.1 Air purging 11.1.2 Pumping down...

  • Page 86: Air Purging Of The Piping And Indoor Unit

    11.1 Air Purging of the Piping and Indoor Unit TOP PREVIOUS NEXT 11.1.1 Air purging 11.1.2 Pumping down 11.1.3 Re-air purging 11.1.4 Balance refrigerant of the 3-way valves 11.1.5 Evacuation 11.1.6 Gas charging TOP PREVIOUS NEXT...

  • Page 87: Air Purging

    11.1.1 Air purging TOP PREVIOUS NEXT Required tools: ● Hexagonal wrench, adjustable wrench, torque wrenches, wrench to hold the joints, gas leak detector, and charging set. The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration pipes, it will affect the compressor, reduce the cooling capacity, and could lead to a malfunction.
  • Page 88 Check for gas leakage. Check the flare connections for gas leakage. Purge the air from the system. Open the Low pressure side valve of the manifold gauge. Press the service port pin with the hexagonal wrench to purge the air for three seconds and then wait for one minute.

  • Page 89: Pumping Down

    11.1.2 Pumping down TOP PREVIOUS NEXT Procedure: Confirm that both the 3-way valves are set to the open position. Remove the valve caps and confirm that the valve caps are in the raised position. Be sure to use a hexagonal wrench to operate the valve stems. Operate the unit for 10 to 15 minutes.
  • Page 90 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1 MPa. If the unit cannot be operated at the cooling (weather is rather cool), press the Pump Down switch on the Indoor unit. So that the unit can be operated. Immediately set the gas side (Low side) 3-way valve to the close position.
  • Page 91 11.1.3 Re-air purging TOP PREVIOUS NEXT (Re-installation) Procedure: Remove the cap nut from 3-way valves. Remove the cap nut from 3-way valves after carefully checked whether the piping connection was properly and certainly done. Confirm that valve in both 3-way valves are set to the CLOSE. Connect the gas cylinder to the liquid-side (high-pressure) 3-way valve and the charge set to the gas side (low-pressure) 3-way valve.
  • Page 92 Open the valve on the gas cylinder. Open the valve on the manifold gauge, discharge for three seconds and wait for one minute. Repeat this three times. Check for gas leakage. Check the flare connections for gas leakage. Discharge the refrigerant. Close the valve on the gas cylinder and discharge the refrigerant until the gauge indicates 0.1 to 0.3 MPa.

  • Page 93: Balance Refrigerant Of The 3-Way Valves

    11.1.4 Balance refrigerant of the 3-way valves TOP PREVIOUS NEXT Procedure: Confirm that both the 3-way valves are set to the open position. Connect the manifold gauge to the gas side (Low side) 3-way valves port. Leave the valve on the manifold gauge closed. Connect the manifold gauge to the service port.
  • Page 94 TOP PREVIOUS NEXT...
  • Page 95 11.1.5 Evacuation TOP PREVIOUS NEXT (No refrigerant in the refrigeration cycle) Procedure: Connect the vacuum pump to the manifold gauges centre hose. Evacuation for approximately one hour. Confirm that the gauge needle has moved toward -0.01 MPa. Close the valve (Low side) on the manifold gauge, turn off the vacuum pump, and confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
  • Page 96 TOP PREVIOUS NEXT...

  • Page 97: Gas Charging

    11.1.6 Gas charging TOP PREVIOUS NEXT (After Evacuation) Procedure: Connect the charge hose to the gas charging cylinder. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. Purge the air from the charge hose. Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air.
  • Page 98 Immediately disconnect the charge hose from the 3-way valves service port. Stopping partway will allow the refrigerant to be discharged. If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air conditioner before disconnecting the hose. Mount the valve caps and the service port caps.

  • Page 99: Servicing Information

    12 Servicing Information TOP PREVIOUS NEXT Caution: Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. ● Please use a high temperature soldering iron. In case of the soldering iron with temperature control,please set it to 700 ± 20°F (370 ±...

  • Page 100: Indoor Electronic Controllers Removal Procedures

    12.1 Indoor Electronic Controllers Removal Procedures TOP PREVIOUS NEXT 1. The Electronic Controller, a Signal Receiver and an Indicator ( Fig. 3 ) can be seen by the below steps: Open the Intake Grille and remove the screw at the front of the Front Grille. ( Fig.
  • Page 101 Fig. 2 Fig. 3 Fig. 4 TOP PREVIOUS NEXT...
  • Page 102 12.2 Cross Flow Fan Indoor and Fan Motor Removal Procedures TOP PREVIOUS NEXT 1. In order to remove the Cross Flow Fan and Indoor Fan Motor, Control Board need to be taken out by releasing all the connectors as indicated below. A.
  • Page 103 Fig. 7 Fig. 8 6. Remove the Bearing. ( Fig. 9 7. Remove the screws at the left of the Evaporator. ( Fig. 9 8. Push up the Evaporator and pull out the Cross Flow Fan from shaft. By then, Fan Motor can be taken out.
  • Page 104 Fig. 9 Fig. 10 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. If this happen, remove the cover of the remote control and you will find a resetting terminal, and by shorting it with a minus screwdriver, it will return to normal.
  • Page 105 TOP PREVIOUS NEXT...

  • Page 106: Troubleshooting Guide

    13 Troubleshooting Guide TOP PREVIOUS NEXT 13.1 Refrigeration cycle system 13.1.1 Relationship between the condition of the air conditioner and pressure and electric current 13.1.2 Diagnosis methods of a malfunction of a compressor and 4-way valve TOP PREVIOUS NEXT...

  • Page 107: Refrigeration Cycle System

    13.1 Refrigeration cycle system TOP PREVIOUS NEXT 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. 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 on the right.
  • Page 108 13.1.1 Relationship between the condition of the air conditioner and pressure and electric current 13.1.2 Diagnosis methods of a malfunction of a compressor and 4-way valve TOP PREVIOUS NEXT...

  • Page 109: Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current

    13.1.1 Relationship between the condition of the air conditioner and pressure and electric current TOP PREVIOUS NEXT Cooling Mode Heating Mode Condition of the air conditioner Low Pressure High Pressure Electric current Low Pressure High Pressure Electric current during operation during operation Insufficient refrigerant (gas leakage)
  • Page 110 TOP PREVIOUS NEXT...

  • Page 111: Diagnosis Methods Of A Malfunction Of A Compressor And 4-Way Valve

    13.1.2 Diagnosis methods of a malfunction of a compressor and 4-way valve TOP PREVIOUS NEXT Nature of fault Symptom Electric current during operation becomes approximately 20% lower than the normal ● value. Insufficient compressing of a compressor The discharge tube of the compressor becomes abnormally hot (normally 70 to ●...
  • Page 112 The temperature different between from the discharge tube to the 4-way valve and ● from suction tube to the 4-way valve becomes almost zero. TOP PREVIOUS NEXT...

  • Page 113: Technical Data

    14 Technical Data TOP PREVIOUS NEXT...
  • Page 115 TOP PREVIOUS NEXT...

  • Page 116: Exploded View

    15 Exploded View TOP PREVIOUS NEXT 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. TOP PREVIOUS NEXT...

  • Page 118: Replacement Parts List

    16 Replacement Parts List TOP PREVIOUS NEXT <Model: CS-A18CK> REF. NO. PART NAME & DESCRIPTION QTY. CS-A18CK REMARKS CHASSY COMPLETE CWD50C1212 FAN MOTOR CWA981056 CROSS FLOW FAN COMPLETE CWH02C1010 SCREW - CROSS FLOW FAN CWH4580304 CWH64K007 BEARING ASSY EVAPORATOR CWB30C1283 FLARE NUT CWH6002140 (1/4) FLARE NUT...

  • Page 119: Installation Plate

    CWH82C067 INSTALLATION PLATE CWH36K1007 (Note) All parts are supplied from MAICO, Malaysia (Vendor Code: 061). ● O marked parts are recommended to be kept in stock. ● (1) - CS-A18CKPG-4 (USA). ● (2) - CS-A18CKPG-5 (Canada). ● TOP PREVIOUS NEXT...
  • Page 120 17 Exploded View TOP PREVIOUS NEXT 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. TOP PREVIOUS NEXT...
  • Page 122 18 Replacement Parts List TOP PREVIOUS NEXT <Model: CU-A18CK> REF. NO. PART NAME & DESCRIPTION QTY. CU-A18CK REMARKS CWD50K2056B CHASSY ASSY SOUND PROOF BOARD CWH15223A FAN MOTOR BRACKET CWD54237 SCREW - FAN MOTOR BRACKET CWH55027 FAN MOTOR CWA951238 SCREW - FAN MOTOR MOUNT CWH55252 CWH00K1001 PROPELLER FAN ASSY...
  • Page 123 SENSOR COMPLETE CWA50C618 HOLDER - SENSOR CWH32089 CABINET FRONT PLATE CWE06K1037B CABINET REAR PLATE CWE021015B CABINET FRONT PLATE CWE061054B CABINET SIDE PLATE CWE041045B CABINET TOP PLATE CWE031019B CONTROL BOARD COVER CWH13K1006A CWH131139 HANDLE CWE16000E OPERATION INSTRUCTIONS CWF563736 CWF563737 INSTALLATION INSTRUCTIONS CWF612331 PARTICULATE PLATE CWD90830...

  • Page 124: Electronic Circuit Diagram

    19 Electronic Circuit Diagram TOP PREVIOUS NEXT How to use electronic circuit diagram TIMER TABLE Test Mode Name Time (When test point Remarks Short-circuited) Sleep Mode Waiting 1 hr. 6 sec. Sleep Mode Operation 8 hrs. 48 sec. 1 hr. 1 min.
  • Page 125 40 sec. 4 sec. Cooling 70 sec. 7 sec. Deodorizing Control 20 sec. 2 sec. 180 sec. 18 sec. Soft Dry 40 sec. 4 sec. 360 sec. 36 sec. Comp. Reverse Rotation Detection 5 min. 30 sec. Comp. ON 5 min. and above 2 min.

  • Page 126: Schematic Diagram

    • CS-A18CK / CU-A18CK SCHEMATIC DIAGRAM 1/3 TEMPERATURE ELECTRONIC CONTROL UNIT FUSE TEST R54 1k PC01 TLP620 R52 1.82k R50 47k Q001 DEICE (BLU) R51 47k BZ01 (RED) TO OUTDOOR RY-HOT AC01 (WHT) COIL FUSE 01 (4-WAYS VALVE) RY-PWR COMP (V) AC1 (W) HOT1 (R) DEICE (GR) HOT2 (BL) R59 1k...
  • Page 127 SCHEMATIC DIAGRAM 2/3 CN-MAIN R11 1k R12 1k R35 5.1k R03 100 R02 20k R10 10k R29 1k 1000p (MB) P50/A8 STEPPING RY-PWR DRIVE SIGNAL P51/A9 MOTOR AUTO OPERATION R13 430 DRIVE TEST RUN P03/NTP3 R07 20k SIGNAL REMOTE CONTROL P52/A10 R14 620 SOUND...
  • Page 128 SCHEMATIC DIAGRAM 3/3 ELECTRONIC CONTROL UNIT R020 F001 D101 R026 CN001 R016 R052 R027 L001 R105 C003 Z001 C005 R017 C002 R051 R031 DB004 Q004 + C007 C004 C012 L101 R050 R015 ZD002 R013 R048 R025 C103 ZD003 R014 TH001 TH002 D007 R030 R046 C009 C010...

  • Page 129: Remote Control

    19.1 REMOTE CONTROL TOP PREVIOUS NEXT...
  • Page 130 TOP PREVIOUS NEXT...

  • Page 131: Print Pattern Indoor Unit Printed Circuit Board

    19.2 PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT BOARD TOP VIEW TOP PREVIOUS NEXT...
  • Page 132 TOP PREVIOUS NEXT...

  • Page 133: Bottom View

    19.3 PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT BOARD BOTTOM VIEW TOP PREVIOUS NEXT TOP PREVIOUS NEXT...

  • Page 134: Print Pattern Outdoor Unit Printed Circuit Board

    19.4 PRINT PATTERN OUTDOOR UNIT PRINTED CIRCUIT BOARD TOP PREVIOUS TOP PREVIOUS...

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Cu-18ckp6g

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