Daikin FWXV15AVEB Service Manual
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Daikin FWXV15AVEB Service Manual

Fan coil unit - convector - floor standing type a-series
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Service
Manual
Fan Coil Unit - Convector -
Floor Standing Type A-Series
[Applied Models]
Fan Coil Unit - Convector - : Heat Pump
SiBE611027_A

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Summary of Contents for Daikin FWXV15AVEB

  • Page 1 SiBE611027_A Service Manual Fan Coil Unit - Convector - Floor Standing Type A-Series [Applied Models] Fan Coil Unit - Convector - : Heat Pump...
  • Page 2 SiBE611027_A Fan Coil Unit - Convector - Floor Standing Type A-Series Heat Pump FWXV15AVEB FWXV20AVEB Table of Contents...

  • Page 3: Table Of Contents

    SiBE611027_A 1. Introduction .................... iv 1.1 Safety Cautions ..................iv 1.2 Used Icons .................... viii Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 5 1.
  • Page 4 SiBE611027_A 4.1 Error Codes and Description ..............44 4.2 Indoor Unit PCB Abnormality ..............45 4.3 Fan Motor (DC Motor) or Related Abnormality........46 4.4 Thermistor or Related Abnormality (Indoor Unit)........48 5. Check ....................49 5.1 How to Check ..................49 Part 7 Removal Procedure ............51 1.

  • Page 5: Introduction

    SiBE611027_A Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 6 Introduction SiBE611027_A Caution Do not repair the electrical components with wet hands. Working on the unit with wet hands may cause an electrical shock. Do not clean the unit by splashing water. Washing the unit with water may cause an electrical shock. Be sure to provide the grounding when repairing the unit in a humid or wet place, to avoid electrical shocks.
  • Page 7 SiBE611027_A Introduction 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the unit. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 8 Introduction SiBE611027_A Caution Installation of a leakage breaker is necessary to prevent electrical shocks. Do not install the unit in a place where there is a possibility of combustible gas leaks. If the combustible gas leaks and remains around the unit, it may cause a fire. Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.

  • Page 9: Used Icons

    SiBE611027_A Introduction Used Icons Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in the table below: Icon Meaning Description Note A “note” provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks.

  • Page 10: Part 1 List Of Functions

    SiBE611027_A Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 11: Functions

    SiBE611027_A Functions 1. Functions Category Functions Category Functions Comfortable Power-Airflow Flap — Health & Air-Purifying Filter — Airflow Clean Power-Airflow Dual Flaps — Photocatalytic Deodorizing Filter — Power-Airflow Diffuser — Air-Purifying Filter with Photocatalytic — Deodorizing Function Wide-Angle Louvers Vertical Auto-Swing (Up and Down) Titanium Apatite Photocatalytic Air-Purifying Filter Horizontal Auto-Swing (Right and Left)

  • Page 12: Part 2 Specifications

    SiBE611027_A Part 2 Specifications 1. Specifications ..................4 Specifications...

  • Page 13: Specifications

    SiBE611027_A Specifications 1. Specifications 50 Hz, 220 - 230 - 240 V / 60 Hz, 220 V FWXV15AVEB FWXV20AVEB Model Cooling Heating Cooling Heating Dimensions (H × W × D) 600 × 700 × 210 600 × 700 × 210 Packaged Dimensions (H ×...

  • Page 14: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE611027_A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........6 Printed Circuit Board Connector Wiring Diagram...

  • Page 15: Printed Circuit Board Connector Wiring Diagram

    SiBE611027_A Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram Connectors and Other Parts PCB (1): Sensor PCB 1) S49 Connector for control PCB 2) RTH2 (R1T) Room temperature thermistor PCB (2): Control PCB 1) S1 Connector for fan motor 2) S19, S43 Connector for sub PCB...
  • Page 16 Printed Circuit Board Connector Wiring Diagram SiBE611027_A PCB Detail PCB (1): Sensor PCB RTH2 3P191450-1 PCB (2): Control PCB 2P258262-1 LED A PCB (3): Service PCB PCB (4): Display PCB SW2-1 SW2-2 LED1 SW2-4 LED2 3P191447-1 3P191448-1 ✩ LED 3 does not function. PCB (5): Sub PCB FU11 FU12...

  • Page 17: Part 4 Function And Control

    SiBE611027_A Part 4 Function and Control 1. Temperature Control ................9 2. Airflow Direction Control................10 3. Fan Speed Control ................11 4. Thermostat Control ................12 5. POWERFUL Operation .................13 6. Interlinked Control with “Altherma”............14 7. Water Valve Control ................15 8. Other Functions..................16 8.1 Signal Receiving Sign ................16 8.2 Indoor Unit ON/OFF Button..............16 8.3 Titanium Apatite Photocatalytic Air-Purifying Filter ........16...

  • Page 18: Temperature Control

    Temperature Control SiBE611027_A 1. Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures Room temperature: temperature of lower part of the room Set temperature: temperature set by remote controller Room thermistor temperature: temperature detected by room temperature thermistor Target temperature: temperature determined by microcomputer Target temperature Room thermistor temperature...

  • Page 19: Airflow Direction Control

    SiBE611027_A Airflow Direction Control 2. Airflow Direction Control Wide-Angle The louvers, made of elastic synthetic resin, provide a wide range of airflow that guarantees a comfortable air distribution. Louvers Right and Left (manual) Upper air outlet (R6827) Lower air outlet (R6828) Auto-Swing The following table explains the auto-swing process for cooling and heating:...

  • Page 20: Fan Speed Control

    Fan Speed Control SiBE611027_A 3. Fan Speed Control Outline Phase control and fan speed control contains 10 steps: LLL, LL, Q, S, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.

  • Page 21: Thermostat Control

    SiBE611027_A Thermostat Control 4. Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Cooling Room thermistor temperature – target temperature 0˚C –1.0˚C (R12703) Heating Room thermistor temperature – target temperature +1.0˚C 0˚C (R12704) Refer to “Temperature Control”...

  • Page 22: Powerful Operation

    POWERFUL Operation SiBE611027_A 5. POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the unit by increasing indoor fan rotating speed. Detail Start Press the POWERFUL button on the remote controller. Operation 15 class : H tap + 80 rpm 20 class : H tap + 60 rpm The POWERFUL operation ends when any of the following conditions is fulfilled.

  • Page 23: Interlinked Control With "Altherma

    SiBE611027_A Interlinked Control with “Altherma” 6. Interlinked Control with “Altherma” Outline When the hydrobox (BA series or later) is connected and the switch for interlinked control with "Altherma" is effective, the system checks if the operation mode on the hydrobox and the one on the indoor unit are compatible or not.

  • Page 24: Water Valve Control

    Water Valve Control SiBE611027_A 7. Water Valve Control Outline When the optional 2-way valve kit (EKVKHPC) is adopted, the quantity of water is controlled according to the status of the operation. Detail The optional 2-way valve moves behind the command for “open” or “close” (continuity ON/OFF). Operation “Open”...

  • Page 25: Other Functions

    SiBE611027_A Other Functions 8. Other Functions Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. Indoor Unit ON/OFF Button An ON/OFF button is provided on the display of the unit. Press the button to start operation.

  • Page 26: Part 5 Operation Manual

    SiBE611027_A Part 5 Operation Manual 1. System Configuration................18 2. Operation Manual..................19 2.1 Names of Parts..................19 2.2 COOL · HEAT · FAN Operation..............22 2.3 Adjusting the Airflow Direction..............24 2.4 POWERFUL Operation ................26 2.5 FORCED QUIET Operation ..............27 2.6 OFF TIMER Operation ................28 2.7 ON TIMER Operation ................29 2.8 WEEKLY TIMER Operation ..............30 Operation Manual...

  • Page 27: System Configuration

    SiBE611027_A System Configuration 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.

  • Page 28: Operation Manual

    Operation Manual SiBE611027_A 2. Operation Manual Names of Parts Names of Parts Indoor Unit Open the front panel Air outlet selection switch • This setting blows air from upper outlet only. • This setting automatically decides a blow pattern depending on mode and conditions.

  • Page 29: Indoor Unit

    SiBE611027_A Operation Manual Indoor Unit 1. Air filter 10. Model name plate 2. Titanium apatite photocatalytic 11. Indoor unit ON/OFF switch: air-purifying filter: • The operation mode will be the mode that • These filters are attached to the inside was in effect before the unit was stopped.

  • Page 30: Remote Controller

    Operation Manual SiBE611027_A Names of Parts Remote Controller <Open the front cover> <ARC452A15> 1. Signal transmitter: 8. QUIET button: • It sends signals to the indoor unit. FORCED QUIET operation (page 15) 2. Display (LCD): 9. SWING button: • Adjusting the airflow direction (page 12) •...

  • Page 31: Cool · Heat · Fan Operation

    SiBE611027_A Operation Manual COOL · HEAT · FAN Operation COOL · HEAT · FAN Operation The unit operates with the operation mode of your choice. From the next time on, the unit will operate with the same operation mode To start operation 1.
  • Page 32 Operation Manual SiBE611027_A To change the temperature setting 4. Press COOL or HEAT operation FAN operation Press to raise the temperature and press to lower the temperature. The temperature setting is not variable. Set to the temperature you like. To change the airflow rate setting 5.

  • Page 33: Adjusting The Airflow Direction

    SiBE611027_A Operation Manual Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. • The flap (horizontal blade) will begin to swing. To set the flap at desired position •...
  • Page 34 Operation Manual SiBE611027_A Airflow selection Airflow selection • Make airflow selection according to what suits you. When setting the airflow selection switch to • Unit automatically decides the appropriate blowing pattern depending on the operation mode/situation. Mode Situation Blowing pattern •...

  • Page 35: Powerful Operation

    SiBE611027_A Operation Manual POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation..

  • Page 36: Forced Quiet Operation

    Operation Manual SiBE611027_A FORCED QUIET Operation FORCED QUIET Operation FORCED QUIET operation lowers the noise level of the indoor unit by changing the fan speed. This function is convenient during night. To start FORCED QUIET operation 1. Press • “ ”...

  • Page 37: Off Timer Operation

    SiBE611027_A Operation Manual OFF TIMER Operation OFF TIMER Operation Timer functions are useful for automatically switching the unit on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...

  • Page 38: On Timer Operation

    Operation Manual SiBE611027_A ON TIMER Operation ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press • “ ” and setting time are displayed on the LCD. •...

  • Page 39: Weekly Timer Operation

    SiBE611027_A Operation Manual WEEKLY TIMER Operation WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week. It is convenient if the WEEKLY TIMER is set according to the family’s life style. Using in these cases of WEEKLY TIMER An example of WEEKLY TIMER settings is shown below.
  • Page 40 Operation Manual SiBE611027_A To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C...
  • Page 41 SiBE611027_A Operation Manual WEEKLY TIMER Operation 6. Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to step 9 when setting the OFF TIMER. 7.
  • Page 42 Operation Manual SiBE611027_A Setting Displays Day and number ON/OFF Time Temperature NOTE Notes on WEEKLY TIMER operation • Do not forget to set the clock on the remote controller first. • The day of the week, ON/OFF TIMER mode, time and set temperature (only for ON TIMER mode) can be set with WEEKLY TIMER.
  • Page 43 SiBE611027_A Operation Manual WEEKLY TIMER Operation Copy mode • A reservation made once can be copied another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C...
  • Page 44 Operation Manual SiBE611027_A 5. Press • The reservation will be copied to the selected day of the week. The whole reservation of the selected day of the week will be copied. • To continue copying +settings to other days of the week, repeat step 4 and step 5.
  • Page 45 SiBE611027_A Operation Manual WEEKLY TIMER Operation Confirming a reservation • The reservation can be confirmed. 1. Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
  • Page 46 Operation Manual SiBE611027_A To delete reservations The individual reservation • Refer to setting mode. (page 19) When selecting desired mode at step 4 in setting mode, select “blank”. The reservation will be deleted. The reservations for each day of the week •...

  • Page 47: Part 6 Service Diagnosis

    SiBE611027_A Part 6 Service Diagnosis 1. Troubleshooting with LED ..............39 2. Problem Symptoms and Measures ............40 3. Service Check Function ................41 3.1 ARC452 Series..................41 4. Troubleshooting ..................44 4.1 Error Codes and Description ..............44 4.2 Indoor Unit PCB Abnormality ..............45 4.3 Fan Motor (DC Motor) or Related Abnormality........46 4.4 Thermistor or Related Abnormality (Indoor Unit)........48 5.

  • Page 48: Troubleshooting With Led

    Troubleshooting with LED SiBE611027_A 1. Troubleshooting with LED The operation lamp blinks when any of the following situations is detected. 1. When a protection control is activated or when the thermistor malfunctions. → Conduct the diagnostic procedure described in the following pages. 2.

  • Page 49: Problem Symptoms And Measures

    SiBE611027_A Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The units does not operate. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the outdoor unit. Check to make sure that the outdoor unit is —...

  • Page 50: Service Check Function

    Service Check Function SiBE611027_A 3. Service Check Function ARC452 Series 1. When the timer cancel button is held down for 5 seconds, “ 00 ” indication appears on the Check Method 1 temperature display section. TIMER CANCEL button < ARC452 Series > (R12706) 2.
  • Page 51 SiBE611027_A Service Check Function Check Method 2 1. Press the 3 buttons (TEMP▲, TEMP▼, MODE) at the same time. (R12741) The figure of the ten’s place blinks. (R8382) 2. Press the TEMP▲ or ▼ button and change the figure until you hear the sound of “beep” or “pi pi”.
  • Page 52 Service Check Function SiBE611027_A 5. Press the TEMP▲ or ▼ button and change the figure until you hear the sound of “beep”. (R12742) 6. Diagnose by the sound. ★ “pi” : The figure of the ten’s place does not accord with the error code. ★...

  • Page 53: Troubleshooting

    SiBE611027_A Troubleshooting 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page Indoor unit PCB abnormality Fan motor (DC motor) or related abnormality Indoor heat exchanger thermistor or related abnormality Room temperature thermistor or related abnormality Service Diagnosis...

  • Page 54: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE611027_A Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by the indoor unit PCB. Malfunction Detection Malfunction There is no zero-cross detection in approximately 10 seconds. Decision Conditions Supposed Wrong models interconnected Causes Defective indoor unit PCB Disconnection of connector...

  • Page 55: Fan Motor (Dc Motor) Or Related Abnormality

    SiBE611027_A Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction The detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 56 Troubleshooting SiBE611027_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn off the power supply Refer to P.49 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.

  • Page 57: Thermistor Or Related Abnormality (Indoor Unit)

    SiBE611027_A Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4 , C9 Remote Controller Display Method of The temperatures detected by the thermistors determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions Supposed...

  • Page 58: Check

    Check SiBE611027_A 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check the connection of connector. 2. Check the motor power supply voltage output (pins 4 - 7). 3. Check the motor control voltage (pins 4 - 3). 4.
  • Page 59 SiBE611027_A Check 5.1.2 Thermistor Resistance Check Check No.06 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below.

  • Page 60: Part 7 Removal Procedure

    SiBE611027_A Part 7 Removal Procedure 1. Indoor Unit.....................52 1.1 Removal of Air Filter / Front Panel / Front Grille ........52 1.2 Removal of Horizontal Blade..............55 1.3 Removal of Main Electrical Box / Sub Electrical Box ......56 1.4 Removal of PCB from Sub Electrical Box ..........59 1.5 Removal of PCB from Main Electrical Box ..........61 1.6 Removal of Upper Vertical Blades ............65 1.7 Removal of Lower Vertical Blades ............67...

  • Page 61: Indoor Unit

    SiBE611027_A Indoor Unit 1. Indoor Unit Removal of Air Filter / Front Panel / Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. External appearance (R12437) Operation TIMER lamp...
  • Page 62 Indoor Unit SiBE611027_A Step Procedure Points Press and unfasten the 2 hooks of the air filter. Air filter (R12448) Pull out the air filter. (R12449) Remove the Titanium The Titanium apatite apatite photocatalytic photocatalytic air-purifying air-purifying filter filter ASSY is attached to the ASSY.
  • Page 63 SiBE611027_A Indoor Unit Step Procedure Points When installing the air filter, catch the 2 hooks at the Hook for the air filter bottom. When installing the front panel, catch the 3 hooks of the front grille and hook the string to prevent the front panel from dropping.

  • Page 64: Removal Of Horizontal Blade

    Indoor Unit SiBE611027_A Removal of Horizontal Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the horizontal Horizontal blade blade. Release the center shaft. (R6778) Bend the horizontal Release the left shaft first blade to release the...

  • Page 65: Removal Of Main Electrical Box / Sub Electrical Box

    SiBE611027_A Indoor Unit Removal of Main Electrical Box / Sub Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 earth Hook screws. Sensor PCB Unfasten the hook and fixing plate...
  • Page 66 Indoor Unit SiBE611027_A Step Procedure Points Disconnect the [S1]: fan motor connectors [S1] [S41] [S41]: lower air outlet motor [S42]. [S42] [S42]: swing motor [S43]: Sub PCB [S41] [S43] [S1] (R12460) Release the harnesses. (R12461) Remove the screw of Main electrical box the main electrical box.
  • Page 67 SiBE611027_A Indoor Unit Step Procedure Points 10 Remove the main electrical box and the sub electrical box. Main electrical Sub electrical (R12753) 11 Pull out the indoor heat exchaneopger thermistor. Indoor heat exchanger thermistor (R12454) Removal Procedure...

  • Page 68: Removal Of Pcb From Sub Electrical Box

    Indoor Unit SiBE611027_A Removal of PCB from Sub Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points External appearance of the sub electrical box. electrical To main electrical box (R12455)
  • Page 69 SiBE611027_A Indoor Unit Step Procedure Points Open the cover. Cover (R12466) Disconnect the [S10] [S30]: control PCB connectors [S10] [S30] [S40]: terminal board [S40]. [S30] [S10] [S40] (R12467) Detach the 4 spacer with pliers. (R12468) Remove the sub PCB. Refer to page 7 for detail. Sub PCB (R12469) Removal Procedure...

  • Page 70: Removal Of Pcb From Main Electrical Box

    Indoor Unit SiBE611027_A Removal of PCB from Main Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the shield plate. Pull out the clamp. (R12459) Unfasten the 8 hooks Hook...
  • Page 71 SiBE611027_A Indoor Unit Step Procedure Points Disconnect the [S19]: sub PCB connector [S19]. [S19] (R12477) Cut the clamp. (R12478) Disconnect the [S26]: service PCB [S26] connectors [S26] [S46] [S48] [S46] [S46]: display PCB [S48]. [S48]: sensor PCB (R12479) Open and remove the lamp cover.
  • Page 72 Indoor Unit SiBE611027_A Step Procedure Points The figure shows the layout of the service PCB and the display PCB. They are positioned at the back of the lamp cover. Display PCB Service PCB (R12471) Unfasten the 2 hooks of the service PCB. Service PCB (R12475) Remove the service...
  • Page 73 SiBE611027_A Indoor Unit Step Procedure Points 10 Unfasten the 2 hooks and remove the display PCB. Display PCB (R12464) Remove the 2 screws of the control PCB. Hook Unfasten the hook and remove the control PCB. (R12472) Refer to page 7 for detail. (R12474) Removal Procedure...

  • Page 74: Removal Of Upper Vertical Blades

    Indoor Unit SiBE611027_A Removal of Upper Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the [S42]: swing motor [S42] connector [S42] and release the harness from the hook.
  • Page 75 SiBE611027_A Indoor Unit Step Procedure Points The air outlet ASSY has 2 vertical blades ASSYs. Vertical blades ASSY (R12483) Unfasten the 2 hooks and remove the vertical blades ASSY. Center hook (R12484) Hook Slide the protection net along the right and the Protection net left grooves and Groove...

  • Page 76: Removal Of Lower Vertical Blades

    Indoor Unit SiBE611027_A Removal of Lower Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Cut the 2 clamps. Insulation material (R12498) Disconnect the pipings. (R12499) Remove the 2 screws.
  • Page 77 SiBE611027_A Indoor Unit Step Procedure Points Disconnect the drain Be careful not to wet the hose. floor with drain. Drain hose (R12490) Disconnect the [S41]: lower air outlet motor connector [S41]. [S41] (R12754) Release the harness from the clamp. Clamp (R12748) Removal Procedure...
  • Page 78 Indoor Unit SiBE611027_A Step Procedure Points Release the harness from the hook. Hook (R12491) Pull out the drain pan ASSY. Drain pan ASSY (R12492) Remove the motor cover. Remove the 2 screws Lower air outlet motor and remove the lower Motor air outlet motor.
  • Page 79 SiBE611027_A Indoor Unit Step Procedure Points 11 Remove the bearing. Bearing (R12752) 12 Move the thermal insulation slightly and press the 2 hooks undereath with a flat screwdriver. Thermal insulation 13 The figure shows the Drain pan appearance after pressing the 2 hooks Bottom of vertical blades ASSY (Appearance from rear side).

  • Page 80: Removal Of Indoor Heat Exchanger

    Indoor Unit SiBE611027_A Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Unfasten the 2 hooks on the left side of the indoor heat exchanger.

  • Page 81: Removal Of Fan Rotor / Fan Motor

    SiBE611027_A Indoor Unit Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the fan rotor. Remove the 4 screws and remove the bellmouth.
  • Page 82 Indoor Unit SiBE611027_A Step Procedure Points Remove the 3 screws and remove the fan motor cover. Fan motor cover (R12444) Unfasten the 2 hooks and remove the harness retainer. Harness Remove the fan motor. retainer Fan motor Hooks (R12445) 3. Remove the casing. Press the 2 hooks backward Upper casing and remove the casing.

  • Page 83: Part 8 Trial Operation And Field Settings

    SiBE611027_A Part 8 Trial Operation and Field Settings 1. Forced Operation Mode ................75 2. Trial Operation ..................76 3. Purging air.....................77 4. Field Settings ..................78 4.1 Model Type Setting ................78 4.2 When 2 Units are Installed in 1 Room............79 4.3 Jumper and Switch Settings..............80 Trial Operation and Field Settings...

  • Page 84: Forced Operation Mode

    Forced Operation Mode SiBE611027_A 1. Forced Operation Mode Outline After installation, carry out the forced operation and make the water valve open to purge air. Detail Start Press the forced operation ON/OFF button (SW1) on the indoor unit for 5 seconds. Operation Operation mode: FAN Airflow rate: H tap...

  • Page 85: Trial Operation

    SiBE611027_A Trial Operation 2. Trial Operation 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Set the temperature of the water to a sufficient temperature for heating or cooling (6°C to 60°C). Trial operation may be disabled in either mode depending on the room temperature. After trial operation, set the temperature to a normal level.

  • Page 86: Purging Air

    Purging air SiBE611027_A 3. Purging air Air pockets sometimes form in the piping during trial operation after installation or during normal operation. To remove air pockets from inside the piping, follow the steps below to purge air from the unit. Be sure to purge air while the unit is in cooling or heating operation. 1.

  • Page 87: Field Settings

    SiBE611027_A Field Settings 4. Field Settings Model Type Setting ARC452A15 This remote controller is common to heating/cooling use and heating only use. Use the DIP switch on the remote controller to set heating/cooling use or heating only use. Make the setting as shown in the illustration. (The factory set is heating/cooling use.) •...

  • Page 88: When 2 Units Are Installed In 1 Room

    Field Settings SiBE611027_A When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room, 1 of the 2 pairs of indoor unit and wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration. How to set the different addresses 1) Remove the front grille.

  • Page 89: Jumper And Switch Settings

    SiBE611027_A Field Settings Jumper and Switch Settings Jumper Function When connected When cut (factory set) Power failure Auto-restart The unit does not resume operation recovery function after recovering from a power failure. Timer ON/OFF settings are cleared. For the location of the jumper, refer to page 7. Switch Function (factory set)

  • Page 90: Part 9 Appendix

    SiBE611027_A Part 9 Appendix 1. Piping Diagrams..................82 2. Wiring Diagrams..................82 Appendix...

  • Page 91: Piping Diagrams

    SiBE611027_A Piping Diagrams 1. Piping Diagrams FWXV15/20AVEB INDOOR UNIT HEAT EXCHANGER 6.4CuT HEADER THERMISTOR TURBO FAN ON HEAT EXCH. 6.4CuT FIELD PIPING 12.7CuT (12.7CuT) FAN MOTOR G1/2 G1/2 HEADER HEAT OPERATED VALVE FIELD PIPING 12.7CuT (12.7CuT) G1/2 G1/2 G1/2 WATER FLOW COOLING ,HEATING 4D066467A 2.
  • Page 92 Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the Warning world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a particular country. Prior to purchase, please therefore confirm with your local authorised importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used.

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