Panasonic CS-F24DB4E5 Service Manual
Hide thumbs Also See for CS-F24DB4E5:
Table of Contents

Advertisement

Advertisement

Table of Contents
loading

Summary of Contents for Panasonic CS-F24DB4E5

  • Page 1: Table Of Contents

    2.1. Variety of excellent features 4 Dimensions 2.2. Low-noise outdoor units 4.1. CS-F24DB4E5 CS-F28DB4E5 2.3. Improved workability 4.2. CU-L24DBE5 CU-L28DBE5 © 2004 Panasonic HA Air-Conditioning (M) Sdn Bhd (11969-T). All rights reserved. Unauthorized copying and distribution is a violation of law.
  • Page 2 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 5 Refrigeration Cycle 10.1. Pipe length 6 Block Diagram 10.2. Refrigerant additional charge 6.1. CS-F24DB4E5 CS-F28DB4E5 10.3. Position of the centre gravity 6.2. CU-L24DBE5 CU-L28DBE5 10.4. Indoor unit installation 7 Wiring Diagram 10.5. Outdoor unit installation 7.1.
  • Page 3: Service Information

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 1 Service Information Notice of Address setting for NEW Cassette / NEW Outdoor Unit. The new Cassette / New Outdoor models are possible to have address setting for twin / triple control or group control by automatic when main power supply is switched on.
  • Page 4: Operation Range

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 1.4. Operation range 1.4.1. Power Supply The applicable voltage range for each unit is given in the following table. The working voltage among the three phases must be balanced within a 3% deviation from each voltage at the compressor terminals. The starting voltage must be higher than 85% of the rated voltage.
  • Page 5: Features

    • • • • Dry mode can make a comfortable indoor environment during wet season. 2.1.5. Quiet operation • • • • The sound level is as low as 32 dB (A) for model CS-F24DB4E5, 33 dB (A) for model CS-F28DB4E5 and suitable for offices, shops, homes etc., where quiet operation is essential. 2.1.6.
  • Page 6: Piping And Drainage

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 2.1.8. Piping and drainage • • • • Built-in upward draining mechanism. 2.1.9. Automatic changeover function (heat pump models) • • • • The unit automatically switches between cooling and heating in accordance with operating load in order to maintain a comfortable indoor temperature.
  • Page 7: Low-Noise Outdoor Units

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 2.2. Low-noise outdoor units [Product features] 2.2.1. Low-noise design improves in surrounding areas 1. The noise-suppressing winglet fan is a result of new research into vane design theory. The unique curved shape suppresses the generation of vortexes, thus reduces air flow noise.
  • Page 8: Improved Workability

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 2.3. Improved workability 2.3.1. Pipes that are one size larger can also be connected for renewal • • • • If renewing the system, existing refrigerant pipes can be utilized so that only the indoor units need to be replaced.
  • Page 9: A Brand-New Control Method

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 2.3.8. Centralized draining method • • • • Even when multiple outdoor units are installed to a wall, the drain outlets can be concentrated into a single drain pipe. This makes installation easier also improve appearance.
  • Page 10: Wired Remote Control

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 2.5. Wired Remote Control 1. The new design includes an easily-visible red pilot lamp. The power can be turned on and off at a single touch, without opening the cover. 2. Has a build-in thermistor, allowing indoor temperature detection in accordance with indoor conditions by switching with main unit thermistor.
  • Page 11: Group Control Equipment

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 2.7. Group Control Equipment Group control by one remote [Remote side] • • • • Optional wired remote control • • • • All air conditioner units are control CZ-RD513C controlled as a whole by remote control.
  • Page 12: Specification

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 3 Specification 3.1. Product Specification 3.1.1. CS-F24DB4E5 CU-L24DBE5 ITEM / MODEL Indoor Unit Outdoor Unit Main Body CS-F24DB4E5 CU-L24DBE5 Panel CZ-BT03P Remote CZ-RD513C (Wired) Control CZ-RL513B (Wireless) Cooling Capacity BTU/h 21,500 Heating Capacity BTU/h 24,200...
  • Page 13 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 3.1.2. CS-F28DB4E5 CU-L28DBE5 ITEM / MODEL Indoor Unit Outdoor Unit Main Body CS-F28DB4E5 CU-L28DBE5 Panel CZ-BT03P Remote CZ-RD513C (Wired) Control CZ-RL513B (Wireless) Cooling Capacity BTU/h 24,200 Heating Capacity BTU/h 27,300 Refrigerant Charge-less Standard Air Volume for High,...
  • Page 14: Dimensions

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 4 Dimensions 4.1. CS-F24DB4E5 CS-F28DB4E5...
  • Page 15: Cu-L24Dbe5 Cu-L28Dbe5

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 4.2. CU-L24DBE5 CU-L28DBE5...
  • Page 16: Refrigeration Cycle

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 5 Refrigeration Cycle...
  • Page 17: Block Diagram

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 6 Block Diagram 6.1. CS-F24DB4E5 CS-F28DB4E5...
  • Page 18: Cu-L24Dbe5 Cu-L28Dbe5

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 6.2. CU-L24DBE5 CU-L28DBE5...
  • Page 19: Wiring Diagram

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 7 Wiring Diagram 7.1. CS-F24DB4E5 CS-F28DB4E5...
  • Page 20: Cu-L24Dbe5 Cu-L28Dbe5

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 7.2. CU-L24DBE5 CU-L28DBE5...
  • Page 21: Operation Details

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 8 Operation Details 8.1. Wired Remote Control (Optional part) Name and function of each part OFF/ON button Used to start and stop the operation. FAN SPEED button Used to select the fan speed of high (HI), medium (MED), low (LO) or auto (AUTO).
  • Page 22: Wireless Remote Control (Optional Part)

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 8.2. Wireless Remote Control (Optional part) Name and function of each part OFF/ON button Used to start and stop the operation. ODOUR WASH button FILTER RESET button Press to cancel the “FILTER” indicator light on the control panel.
  • Page 23: Operation Control

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9 Operation Control Description of basic control functions 9.1. Operation Mode 1. Thermostat control 2. Depend on differences between room temperature and setting temperature, Compressor running frequency will be decided and start operation. Temperature differences become same as below table, then thermostat is off.
  • Page 24 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 − − − − Unit using DC motor As follow the below figure, fan speed changing operation (program air). (rpm center B and is different if capacity rank is different) − − − − Unit using AC motor When 1st thermostat on condition from operation start, fan speed is hi (same as manual fan speed), after 2nd thermostat on condition, fan speed change to medium speed (same as manual medium fan speed).
  • Page 25 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.3.4. Freezing prevention control • • • • During cool or dry mode operation, if indoor evaporator temperature is going down, freezing prevention control is operated. • • • • Detail of Freezing prevention control is as follows;...
  • Page 26: Drain Pump Control

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.3.6. Drain pump control • • • • During cooling, dry, or defrost operation, drain pump operate by following the below table. • • • • When compressor start, drain pump operation start after 10 second of indoor fan starting.
  • Page 27: Defrost Control

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Fan speed auto • • • • When operation start, or during operation, fan speed control by detecting indoor heat exchanger as follows: • • • • (K10 = Indoor heat exchanger temperature, depend on indoor type) 9.4.2.
  • Page 28 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.4.6. Heating high temperature protection • • • • During heating operation, when outdoor temperature is more than 35°C for 15 minute, compressor stop to protect compressor. • • • • After 3 minute (re-start delat control) waiting, if thermostat on condition, outdoor unit re-start.
  • Page 29: Louver Control

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.5. Louver Control 9.5.1. Louver control for cassette type • • • • When power is on, at the same time, louver start initializing toward to close Direction. • • • • During operation, stopping, thermostat off condition, louver angle set manual or auto depend on remote controller setting.
  • Page 30 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.5.2. Ceiling type louver control • • • • When power is on, at the same time, louver initialize 2 times. • • • • During operation, stopping, thermostat is off condition, louver angle change as below table by manual setting or auto setting of remote controller.
  • Page 31: Odour Removing Operation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.6. Odour Removing Operation • • • • During stop condition, or cooling operation, when pushing the [ODOUR] button for 5 second, operation change to the odour removing operation. • • • • Operation detail is as follows;...
  • Page 32: Energy Save Operation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.7. Energy Save Operation • • • • During cooling operation, or heating operation, when pushing the [ECONOMY] button in the wired remote controller, energy save operation start and [ECO] sign is displayed at LCD display panel of wired remote controller ([ECONOMY] sign is displayed at LCD display panel of wireless remote controller).
  • Page 33: Pump Down Operation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 9.11. Pump Down Operation • • • • When pushing the [PUMP DOWN] button on the outdoor PCB for 1 second, pump down operation start. Detail of pump down operation is shown at below table.
  • Page 34: Installation Instruction

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10 Installation Instruction 10.1. Pipe length • • • • CORRECTION OF COOLING CAPACITY AND HEATING CAPACITIES 1. Correction of cooling and heating capacities according to the connecting pipe length. The Data of cooling capacities (marked on the name plate) are based on 5 meters connecting pipe and horizontal installation.
  • Page 35: Refrigerant Additional Charge

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.2. Refrigerant additional charge 1. Piping installation by standard piping • • • • At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30 m.
  • Page 36: Indoor Unit Installation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.4. Indoor unit installation FOUR WAY CASSETTE TYPE AIR CONDITIONERS INSTALLATION INSTRUCTIONS Precautions in terms of safety Carry out installation work with reliability after through reading of this “Precautions in terms of safety”. • • • • Precautions shown here are differentiated between Warnings Cautions .
  • Page 37 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Cautions Carry out Earthing work. Drain piping should be made to ensure secure drainage Do not connect the Earth return to the gas pipe, according to the manual for installation work and carry out the water line pipe, lightning rod and telephone lines.
  • Page 38: Installation Of Indoor Unit

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat exchange reduction, spraying, dispersing of water drops, drain pump malfunction, etc.
  • Page 39 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 POSITIONS OF AIR CONDITIONER BODY AND CEILING SURFACE Warning Tighten the nuts and bolt to prevent unit from falling. HANGING POSITION OF THE AIR CONDITIONER BODY 10.4.4. Refrigerant piping Refrigerant is charged to the outdoor unit. For details, see the manual for installation work of outdoor unit.(Additional charging, etc.)
  • Page 40: Indoor Unit Drain Piping

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • Confirm the red mark of the union (thin side) is always at lower direction after connecting piping. Vacuum drying After completing the piping connection, execute vacuum drying for the connecting piping and the indoor unit.
  • Page 41 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • When the test is completed, connect the flexible drain hose to the drain port. 10.4.6. Heat insulation Caution Be sure to perform heat insulation on the drain, liquid and gas piping. Imperfection in heat insulation work leads to water leakage.
  • Page 42 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.4.7. Electrical wiring As to the main power source and cable size of outdoor unit, read the installation manual attached to the outdoor unit. The units must be installed in accordance with applicable national and local regulations.
  • Page 43 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Earth lead wire shall be longer than other lead wires as shown in the figure for the electrical safety in case of the slipping out of the cord from anchorage. 10.4.8. Settings Do not operate the remote controller within 1 minute after turning on the power of the indoor unit.
  • Page 44: Installation Of Decorative Panel

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.4.9. Installation of decorative panel The decorative panel has its installation direction. Confirm the direction by displaying of the piping side. Before installing the decorative panel, always remove the paper template. 1. Remove the air inlet grill from the decorative panel.
  • Page 45 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 4. Adjust between decorative panel fixing hole and indoor unit screw hole. 5. Fix decorative panel with 4 screws with already fix at paper model for installation. Caution Install certainly the decorative panel. Cool air leakage causes sweating. → Water drops fall.
  • Page 46 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 7. Open the indoor control box cover. (2 pcs) 8. Insert firmly the connector of cosmetic louver to indoor pcb CN-STM1 and CN-STM2. Be caution not to clamp the cord in between control board and control board cover.
  • Page 47: Hand Over

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • First, press the OFF/ON ( ) button. • • • • Then press the TEST RUN button within 1 minute of pressing the OFF/ON ( ) button. • • • • Next, select the operation modes.
  • Page 48: Outdoor Unit Installation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.5. Outdoor unit installation AIR CONDITIONERS OUTDOOR UNIT INSTALLATION INSTRUCTIONS Precautions in terms of safety Carry out installation work with reliability after thorough reading of this “Precautions in terms of safety”. • • • • Precautions shown here are differentiated between Warnings Cautions .
  • Page 49 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Warnings Wiring shall be connected securely using specified cables and fix them securely so that external force of the cables may not transfer to the terminal connection section. Imperfect connection and fixing leads to fire, etc.
  • Page 50 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 b. Prevention measure for refrigerant piping Prevention measure for refrigerant piping is very important work to prevent water-dust-rubbish from getting in. All piping terminals needs sealing such as shown below. Place Period of work Method of seal...
  • Page 51 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 For the use of a gas cylinder without siphon inside, turn it upside down and use it. (We recommend manifold with sight glass.) Caution Do not use a “CHARGE CYLINDER”. Caution As a rule, please collect all existing refrigerants in the system outside the system when the refrigerant leakage occurs by the system.
  • Page 52 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 12. Be sure to leave enough space around the outdoor unit to maintain proper performance and to allow access for routine maintenance. • • • • Allow enough space from any obstacles as shown in Fig. 1.2 below in order to prevent short-circuits from occurring.
  • Page 53 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • If a drain pipe needs to be installed, insert the accessory drain elbow into the mounting hole at the bottom of the outdoor unit, and connect a hose with an inside diameter of 15mm to this drain elbow.
  • Page 54: Charging With Refrigerant

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 3. Notes when connecting the refrigerant pipes. • • • • Use clean copper, pipes with no water or dust on the insides. • • • • Use phosphorus-free, unjointed copper pipes for the refrigerant pipes.
  • Page 55 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • Pump down operation − − − − Operate the pump down according to the following procedures. Procedure Notes 1. Confirm the valve on the liquid side and the gas side is surely open.
  • Page 56 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Earth lead wire shall be longer than other lead wires as shown in the figure for the electrical safety in case of the slipping out of the cord from the anchorage. • • • • Power supply specifications...
  • Page 57 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.5.10. Connecting power supply cables CAUTION • • • • For three phase model, never operate the unit by pressing the electromagnetic switch. • • • • Never correct the phase by switching over any of the wires inside the unit.
  • Page 58 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 NOTE If the self-diagnosis function reports a problem but more than one problem has developed at the indoor and/or outdoor units, the problem display on the remote control unit may not match the LED display on the outdoor unit printed circuit board. In such cases, check both locations and remove the causes of the problems.
  • Page 59: Wired Remote Control Installation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.6. Wired remote control installation Wired Remote Control Installation Manual • • • • Before installing the wired remote controller, be sure to thoroughly read the “Notes with regard to safety” section of the installation manual provided with the indoor unit.
  • Page 60 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 If no displays appear on the remote controller, check while referring to “If no remote controller displays appear” in “5 Test operation”. • • • • The remote control cable is live during use, so please be careful with it.
  • Page 61 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • Strip the end of the remote control cable which is to be connected to the remote controller. (Refer to the illustration below) • • • • Route the remote control cable inside the lower case in accordance with the intended feeding- out direction. (Refer to the illustration below.)
  • Page 62 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 If remote control cable is embedded If installing with the remote control cable exposed 1. Embed an outlet box (JIS C 8336) into the wall, and then secure 1. Secure the remote controller base plate to the wall with two the remote controller base plate to the outlet box with the two accessory 4 mm screws.
  • Page 63 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Automatic address resetting for group control • • • • The address settings for group control (air conditioner Nos. 1 to 16) can be reset automatically. 1. When operation is stopped, press for 5 seconds, continue the TEST RUN switch to display “00” (will be LOCAL MODE).
  • Page 64: Test Operation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.6.5. Test operation • • • • Turn on the main power. • • • • After 3 minutes have passed since the power was turned on, press the OFF/ON switch on the remote controller. (No operation occurs within 3 minutes after the power was turned on.)
  • Page 65 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • You can then switch between the display for the previous problem and the problem before that by pressing the UP (TIMER) DOWN (TIMER) switches. • • • • Press the CHECK switch once more to return to the normal display.
  • Page 66: Wireless Remote Control Installation Manual

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.7. Wireless remote control installation manual Wireless Remote Control Installation Manual • • • • Before installing the wireless remote controller, be sure to thoroughly read the “Notes with regard to safety” section of the installation manual provided with the indoor unit.
  • Page 67 Attach the receptor unit onto the decorative panel of the indoor unit as shown in the figure below. 1. Remove the “corner cover” at the decorative panel indicate “Panasonic” logo left side. 2. Attach the receptor unit which same position.
  • Page 68 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 1. Route the joint cord for wiring as shown in the figure (figure of the back of decorative panel) below. Pass the cord through the hook of the decorative panel, taking care that the cord does not run on the heat insulator, etc.
  • Page 69 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Receptor unit (for ceiling type) assembly procedure Attach the receptor unit onto the indoor main unit as shown in the figure below. Remove the air-intake grille and the side cover. To remove the side cover, remove the fixing screw each on the left and the right and pull the side cover towards you.
  • Page 70 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.7.4. Address setting for wireless remote controller and receptor unit (only when using more than one indoor unit) • • • • Only the air conditioner units which receptor unit address numbers match the remote controller address number can be operated.
  • Page 71 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 NOTE • • • • If the batteries are replaced or the remote controller is reset, the address setting will return to ADDRESS1, so you will need to repeat the address setting again. All setting details which are stored in memory will be cleared, so you will need to repeat the setting.
  • Page 72: Emergency Operation

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 [Manual setting] 10.7.5. Emergency operation • • • • If you do not have the wireless remote controller (because the batteries are weak, or some other reason prevents the wireless remote controller from being used), emergency operation can be carried out at receptor unit.
  • Page 73: Twin And Triple

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 10.8. Twin and triple 10.8.1. Twin and Triple Operation • • • • Simultaneous air conditioning of wide spaces and corners is possible. Indoor units with horsepowers can even be used in combination. • • • • Master unit and slave-units can be set automatically in twin and triple systems. No address setting is necessary.
  • Page 74: Installation And Servicing Air Conditioner Using R410A

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 11 Installation and Servicing Air Conditioner Using R410A 11.1. Outline 11.1.1. About R410A refrigerant 1. Converting air conditioners to R410A Since it was declared in1974 that chlorofluorocarbons (CFC), hydro chlorofluorocarbons (HCFC) and other substances pose a destructive danger to the ozone layer in the earth’s upper stratosphere (20 to 40 km above the earth), measures have been...
  • Page 75: Tools For Installing/Servicing Refrigerant Piping

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 d. R410A refrigerating machine oil Conventionally, mineral oil or a synthetic oil such as alkylbenzene has been used for R22 refrigerating machine oil. Because of the poor compatibility between R410A and conventional oils like mineral oil, however, there is a tendency for the refrigerating machine oil to collect in the refrigerating cycle.
  • Page 76: R410A Tools

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 11.2.2. R410A tools 1. Copper tube gauge for clearance adjustment (used when flaring with the conventional flaring tool (clutch type)) • • • • This gauge makes it easy to set the clearance for the copper tube to 1.0-1.5 mm from the clamp bar of the...
  • Page 77 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 5. Charging hose • • • • The pressure resistance of the charging hose has been raised to match the higher pressure of R410A. The hose material has also been changed to suit HFC use, and the size of the fitting has been changed to match the manifold ports.
  • Page 78 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 8. Electronic scale for refrigerant charging • • • • Because of the high pressure and fast vaporizing speed of R410A, the refrigerant cannot be held in a liquid phase inside the charging cylinder when charging is...
  • Page 79: Refrigerant Piping Work

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 11.3. Refrigerant piping work 11.3.1. Piping materials It is recommended that you use copper and copper alloy jointless pipes with a maximum oil adherence of 40 mg/10m. Do not use pipes that are crushed, deformed, or discolored (especially the inside surface). If these inferior pipes are used, impurities may clog the expansion valves or capillaries.
  • Page 80 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Table 11 R410A flaring dimensions Nominal Outside Wall thickness A (mm) diameter diameter (mm) R410A flaring Conventional flaring tool (mm) tool, clutch type Clutch type Wing-nut type 6.35 0 - 0.5 1.0 - 1.5 1.5 - 2.0 9.52...
  • Page 81: Installation, Transferring, Servicing

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 b. Copper pipes Use only copper pipes with the thickness given in table 10, and with minimal impurities. Because the surface of the pipe is exposed, you should take special care, and also take measures such as marking the pipes to make sure they are easily distinguished from other piping materials, to prevent mistaken use.
  • Page 82 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 11.4.2. Transferring (Using new refrigerant piping) 1. Removing the unit a. Collecting the refrigerant into the outdoor unit by pumping down The refrigerant can be collected into the outdoor unit (pumping down) by pressing the TEST RUN button, even when the temperature of the room is low.
  • Page 83 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 3. Fully open the handle Lo of the manifold gauge, turn on the power of the vacuum pump and continue the vacuum process for at least one hour. 4. Confirm that the low pressure gauge shows a reading of -0.1 Mpa (-76 cmHg), then fully close the handle Lo, and turn off the vacuum pump.
  • Page 84 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 11.4.6. Brazing As brazing requires sophisticated techniques and experiences, it must be performed by a qualified person. In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting dry nitrogen gas (N ) flow.
  • Page 85: Troubleshooting Guide

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 12 Troubleshooting Guide 12.1. Self-diagnosis error code table • • • • The display screen on the wired remote control unit and the self-diagnosis LEDs (green) on the outdoor unit printed circuit board in the outdoor unit can be used to indicate where the location of a problem is.
  • Page 86 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Wired remote Outdoor unit printed circuit board LED Location or problem Check location control unit display Abnormal Detail 302 303 304 305 306 307 308 309 dispaly dispaly Outlet temperature sensor Outlet temperature sensor lead wire,...
  • Page 87: Replacement Parts

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 13 Replacement Parts 13.1. Indoor unit...
  • Page 88 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5...
  • Page 89 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 REF. NO. PART NAME & DESCRIPTION QTY. CS-F24DB4E5 CS-F28DB4E5 ← ← ← ← BASE PAN ASS’Y CWD52K1099 ← ← ← ← INNER POLYSTYRENE COMPLETE CWG07C1045 ← ← ← ← CABINET SIDE PLATE ASS’Y CWE041112 ← ← ← ←...
  • Page 90 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5...
  • Page 91 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 Front Grille Complete (CZ-BT03P) PART DESCRIPTION PART NO. FRONT GRILLE-COMPLETE CWE11C3104 FRAME-FRONT GRILLE CO. CWE11C3101 A.S MOTOR DC, SINGLE 12V 250 OHM CWA981105 BRACKET-A.S.MOTOR CWD932391 VANE CWE241146 SHAFT CWH631038 SHAFT CWH631039 CONNECTOR-SHAFT CWH081007 BEARING CWH641008 LEAD WIRE-A.S.MOTOR...
  • Page 92: Outdoor Unit

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 13.2. Outdoor unit...
  • Page 93 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5...
  • Page 94 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5...
  • Page 95 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 PART DESCRIPTION QTY. CU-L24DBE5 CU-L28DBE5 ← ← ← ← BASE PAN ASS’Y CWD52K1098 ← ← ← ← COMPRESSOR 5KD240XAA21 ← ← ← ← ANTI-VIBRATION BUSHING CWH50055 ← ← ← ← NUT FOR COMP. MOUNT. CWH4582065 ←...
  • Page 96: Electronic Circuit Diagram

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 14 Electronic Circuit Diagram 14.1. Indoor unit SCHEMATIC DIAGRAM 1/4 TO CN-OPT2 CN-TIMER 20k 1% R153 R154 10.0k 1% 10.0k 1% 10.0k 1% 10.0k 1% 0.047 25V 0.047 25V 8 7 6 5 8 7 6 5 0.047 25V...
  • Page 97 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 2/4 TO CN-OPT3 TO CN-DISP R108 R138 0.01 6.3V R107 R131 R106 0.01 R130 3300p 5.1k R123 R118 R115 R117 1000p 1/4W R148 LED1 6.3V VSS3 VDD2 VSS2 VREF+ A52101C62PD VDD1 OSC2 OCS1...
  • Page 98 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 3/4 IC11 2SC18741 (FA) RD16UJ (N3) SY-110AV IA5-E 1.15k 1% 1/4W 600V 1A RD6.2E R110 R111 ZD10 NONE RD6.2E 2SC3052F 2SC3052F RD4.7UJ R116 TLP421 5.6k NONE 1/4W b 10k TLP421 (BL) 4.7k R151...
  • Page 99 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 4/4 ELECTRONIC CONTROL UNIT IC10 CN-EV CN-PWR RY-CON GGE-134P 275VAC FUSE1 TLP421 3.15A 250V (BL) ZNR1 510V 3 4 2 1 3 4 2 1 (ECQU) SW301 SW302 SW303 0.47 275VAC SS26V-R150162 0.22...
  • Page 100: Outdoor Unit

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 14.2. Outdoor unit SCHEMATIC DIAGRAM 1/7 TIC DIAGRAM 1/7 CU-L34DBE5 ELECTRONIC CONTROL UNIT CU-L43DBE5 C411 C405 AC250V AC250V (BLK) MAGNET RELAY LF400 LF401 4700p 4700p CH-BL DF22R-1P (BLK) CN-ACL SC-30-12JN SC-30-12JN (WE) (WE) DF22R-1P CU-L34DBE5...
  • Page 101 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 2/7 A TIC DIAGRAM 2/7 ACL 1 ACL 2 R105 ZNR1 33 1% 1/4W CN-Y1 RY-Y1 PIC1 200V 100 1% 1A5-E 2SC3441 RD10EB2 PIC2 200V 600V 1A 10k 1% FUSE 2 RT-P121 RT-C...
  • Page 102 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 3/7 TIC DIAGRAM 3/7 k 1% 0.047 25V V R158 GB1Z 2 4 6 8 10 86 85 CN-CPU 1 3 5 7 9 R269 MN103S52GPJ C133 0.1 26 27 28 29 30 31 32 33 R257 2.2k...
  • Page 103 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 EXPAND VALVE SCHEMATIC DIAGRAM 4/7 TIC DIAGRAM 4/7 1 2 3 4 5 6 1A5-E 600V 1A EGD1Z C129 ETS29AK7M1AC 450V 0.01 1/4W 1/4W 630V (FC) AMD1Z HRU8L8 (ECQE) 3A2 X 4 ALD1Z 0.47 1/2W 0.22...
  • Page 104 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 5/7 A TIC DIAGRAM 5/7 1.8k 9.53k D3 1k 1% FUSE 1 TLP421 (BL) 1000p 25V IC10 2SA1366 0.01 0.01 51.1k 1WBH50- 6.3V 6.3V 464k 464k 2SA1366 0.047 0.047 10.0 464k 464k 1/4W 1%...
  • Page 105 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 6/7 TIC DIAGRAM 6/7 R200 RD28ER C101 C102 0.22 HVIC1 CORE C103 C104 0.22 HVIC2 BLUE C105 C106 0.22 COMPRESSOR HVIC3 (FC) YELLOW LVIC U OUT IN(X) V OUT IN(Y) C118 IN(Z) W OUT...
  • Page 106 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 SCHEMATIC DIAGRAM 7/7 TIC DIAGRAM 7/7 ELECTRONIC CONTROL UNIT ELECTRONIC CONTROL UNIT COMPLETE TABLE 1 TABLE 3 CODE No. A743401 A743564 NOTE CODE No. A743403 A743566 CT300 NONE CT25UU-P ← R205 NONE 0.03Ω CT301 NONE ←...
  • Page 107: Wired Remote Control

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 14.3. Wired remote control...
  • Page 108: Wireless Remote Control

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 14.4. Wireless remote control...
  • Page 109: Print Pattern

    CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 14.5. Print pattern 14.5.1. Indoor unit • • • • INDOOR UNIT PRINTED CIRCUIT BOARD (MAIN)
  • Page 110 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • INDOOR UNIT PRINTED CIRCUIT BOARD (INDICATOR)
  • Page 111 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 14.5.2. Outdoor unit • • • • OUTDOOR UNIT PRINTED CIRCUIT BOARD (MAIN)
  • Page 112 CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5 • • • • OUTDOOR UNIT PRINTED CIRCUIT BOARD (POWER) • • • • OUTDOOR UNIT PRINTED CIRCUIT BOARD (SERVICE) [PHAAM] Printed in Malaysia...

This manual is also suitable for:

Cu-l24dbe5Cs-f28db4e5Cu-l28dbe5

Table of Contents