Daikin FWXV15AVEB Service Manual Download Page 55

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SiBE611027_A

Troubleshooting

Service Diagnosis

4.3

Fan Motor (DC Motor) or Related Abnormality

Remote
Controller
Display

Method of
Malfunction
Detection

The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation.

Malfunction
Decision
Conditions

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.

Supposed
Causes

Layer short inside the fan motor winding

Breaking of wire inside the fan motor

Breaking of the fan motor lead wires

Defective capacitor of the fan motor

Defective indoor unit PCB

Summary of Contents for FWXV15AVEB

Page 1: ...Service Manual Fan Coil Unit Convector Floor Standing Type A Series SiBE611027_A Applied Models z Fan Coil Unit Convector Heat Pump ...

Page 2: ...SiBE611027_A i Table of Contents Fan Coil Unit Convector Floor Standing Type A Series zHeat Pump FWXV15AVEB FWXV20AVEB ...

Page 3: ...r 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 8 4 Auto restart Function 16 8 5 WEEKLY TIMER Operation 16 Part 5 Operation Manual 17 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...

Page 4: ... 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 1 8 Removal of Indoor Heat Exchanger 71 1 9 Removal of Fan Rotor Fan Motor 72 Part 8 Trial Operation and Field Settings 74 1 Forced Operation Mode 75 2 Trial Operation 76 3 Purging air...

Page 5: ...bol This symbol indicates the action that must be taken or the instruction The instruction is shown in the illustration or near the symbol After the repair work is complete be sure to conduct a trial operation to ensure that the unit operates normally and explain the cautions for operating the product to the customer 1 1 1 Cautions Regarding Safety of Workers Warning Be sure to turn off the power ...

Page 6: ... 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 Be sure to conduct repair work with appropriate tools The use of inappropriate tools may cause injury Be sure to check that the piping has cooled down enough before conducting repair work Working on the unit when the piping is hot may cause ...

Page 7: ... and the instruction manual for installation when conducting electrical work Insufficient power circuit capacity and improper electrical work may cause an electrical shock or fire Be sure to use the specified cable for wiring Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals Improper connections may cause excessive he...

Page 8: ...y grounded Improper grounding may cause an electrical shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 MΩ or higher Faulty insulation may cause an electrical shock Be sure to check that there is no water leakage of piping between indoor and outdoor after the repair Leaked water can fall in drops and wet the furniture and floor Never use wat...

Page 9: ... but may nevertheless be valuable to the reader such as tips and tricks Caution Caution A caution is used when there is danger that the reader through incorrect manipulation may damage unit loose data get an unexpected result or has to restart part of a procedure Warning Warning A warning is used when there is danger of personal injury Reference A reference guides the reader to other places in thi...

Page 10: ...SiBE611027_A 1 List of Functions Part 1 List of Functions 1 Functions 2 ...

Page 11: ...al NIGHT SET Mode INTELLIGENT EYE Operation Worry Free Reliability Durability Auto Restart after Power Failure Quick Warming Function Preheating Operation Self Diagnosis Digital LED Display Hot Start Function Flexibility Multi Split Split Type Compatible Indoor Unit Automatic Defrosting Changeover between Heating Cooling Use and Heating Only Use Operation Automatic Operation Program Dry Operation ...

Page 12: ...SiBE611027_A 3 Specifications Part 2 Specifications 1 Specifications 4 ...

Page 13: ...40 142 240 142 SL 126 74 126 74 198 117 198 117 Capacity Total Capacity Rated M kW 1 2 1 5 1 7 2 0 Btu h 4 100 5 100 5 800 6 800 Sensible Capacity Rated M kW 0 98 1 4 Btu h 3 300 4 800 Water Volume Rated M m h 0 20 0 26 0 29 0 34 L min 3 4 4 3 4 9 5 7 Water Pressure Drop Rated M kPa 10 13 19 22 Running Current Rated M A 0 08 0 08 0 10 0 10 Power Consumption Rated M W 13 13 15 15 Power Factor Rated...

Page 14: ...SiBE611027_A 5 Printed Circuit Board Connector Wiring Diagram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 6 ...

Page 15: ...1 E1 Terminal for earth 12 V1 V2 Varistor 13 JA Address setting jumper Refer to page 79 for detail JC Power failure recovery function Refer to page 80 for detail 14 FU1 F1U Fuse 3 15 A 250 V 15 LED A LED for service monitor green 1 S27 Connector for control PCB 2 SW2 1 Switch for changeover between heating cooling use and heating only use Refer to page 80 for detail 3 SW2 2 Switch for interlinked ...

Page 16: ...tail PCB 1 Sensor PCB PCB 2 Control PCB PCB 5 Sub PCB PCB 3 Service PCB PCB 4 Display PCB LED 3 does not function S49 RTH2 3P191450 1 JA JC S48 S46 S26 S32 2P258262 1 S42 S41 S43 S1 FU1 H3 H2 H1 E1 V1 V2 LED A S21 S19 S27 SW4 SW2 4 SW2 1 SW2 2 3P191448 1 S47 SW1 LED2 LED1 3P191447 1 S40 FU12 FU11 2P257039 1 S30 S10 ...

Page 17: ...eed 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 8 4 Auto restart Function 16 8 5 WEEKLY TIMER Operation 16 ...

Page 18: ...e illustration is for wall mounted type as representative Temperature Control The temperature of the room is detected by the room temperature thermistor However there is difference between the temperature detected by room temperature thermistor and the temperature of lower part of the room depending on the type of the indoor unit or installation condition Practically the temperature control is don...

Page 19: ...plains the auto swing process for cooling and heating Flap Control for Dew Prevention During cooling operation the flap angle is adjusted to prevent dew condensation around the air oultet The angle range for fixing flap differs from the one for auto swing Right and Left manual Upper air outlet Lower air outlet R6827 45 45 R6828 45 45 Up and Down Cooling Heating Upward airflow limit OFF R6831 R6829...

Page 20: ...otor on page 46 Automatic Fan Speed Control In automatic fan speed operation the steps Q and S are not available The airflow rate is automatically controlled within this range when the FAN setting button is set to automatic Cooling The following drawing explains the principle of fan speed control for cooling Heating Step Cooling Heating Fan LLL L tap fixed LL L ML M MH H HH POWERFUL R6834 1 0 C 2 ...

Page 21: ... based on the difference between the room thermistor temperature and the target temperature Cooling Heating Refer to Temperature Control on page 9 for detail OFF ON Room thermistor temperature target temperature 1 0 C 0 C R12703 OFF ON 1 0 C 0 C R12704 Room thermistor temperature target temperature ...

Page 22: ...speed Detail Start Press the POWERFUL button on the remote controller Operation 15 class H tap 80 rpm 20 class H tap 60 rpm End The POWERFUL operation ends when any of the following conditions is fulfilled 1 The operation ends automatically after 20 minutes 2 The operation is stopped 3 Press the POWERFUL button on the remote controller Others The protection functions are prior to the POWERFUL oper...

Page 23: ...unit because the operation modes are incompatible In the same way when the setting of the hydrobox is other than cooling operation you cannot start cooling operation on the indoor unit When the two operation modes become compatible by changing operation mode of the hydrobox or of the indoor unit you can start operation When the two operation modes are incompatible the operation lamp repeats ON 2 5...

Page 24: ... indoor heat exchanger thermistor detects that the water temperature is out of range for use under 6 C or over 61 C the water valve closes for protection The water valve reopens after 10 minutes to determine the water temperature again Dew Prevention Control for Indoor Unit During cooling operation if the thermostat keeps OFF over 480 minutes the water valve closes While the water valve closes due...

Page 25: ...l Note When the ON OFF button is pressed for 10 seconds or more the forced operation is stopped 8 3 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic Deodorizing Filter as a single highly effective filter The filter traps microscopic particles decompose odors and even deactivates bacteria and viruses It lasts for ...

Page 26: ...onfiguration 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 ...

Page 27: ...ver method of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the installation work is and however good the functions are the customer may blame either the room air conditioner or its installation work because of improper handling The installation work and handing ove...

Page 28: ...ection switch Before opening the front panel be sure to stop the operation and turn the breaker off Do not touch the metal parts on the inside of the indoor unit as it may result in injury This setting blows air from upper outlet only This setting automatically decides a blow pattern depending on mode and conditions This setting is recommended The unit is shipped from the factory with this setting...

Page 29: ...3 15 Signal receiver 2 Titanium apatite photocatalytic air purifying filter These filters are attached to the inside of the air filter It senses the air temperature around the unit It receives signals from the remote controller When the unit receives a signal you will hear a short beep Operation start beep beep Settings changed beep Operation stop long beep The operation mode will be the mode that...

Page 30: ...page 12 WEEKLY TIMER operation page 18 11 SELECT button 12 OFF TIMER button page 16 13 ON TIMER button page 17 14 TIMER CANCEL button 15 CLOCK button 1 5 6 2 3 4 ARC452A15 7 8 10 11 12 14 Open the front cover 9 13 15 It displays the current settings In this illustration each section is shown with its displays on for the purpose of explanation It selects the operation mode COOL HEAT FAN page 10 Pre...

Page 31: ...lights up To stop operation 3 Press again disappears from the LCD Then OPERATION lamp goes off COOL HEAT FAN The unit operates with the operation mode of your choice From the next time on the unit will operate with the same operation mode 1 Press and select a operation mode Each pressing of the button advances the mode setting in sequence Heating only use Heating cooling use ...

Page 32: ...ke COOL or HEAT or FAN operation 5 levels of airflow rate setting from to plus are available Note on COOL and HEAT operation Indoor unit quiet operation When the airflow is set to the noise from the indoor unit will become quieter Use this when making the noise quieter Use the unit within the following water temperature range Minimum water temperature 6 C Maximum water temperature 60 C Press to ra...

Page 33: ...e while flap is in auto swing mode is displayed on the LCD The flap horizontal blade will begin to swing The flap will stop moving disappears from the LCD Press when the flap has reached the desired position Unless SWING is selected you should set the flap at a near horizontal angle in HEAT operation and at a upward position in COOL operation to obtain the best performance During COOL operation th...

Page 34: ...es other than below Normal time At start or when air temperature is low So that air does not come into direct contact with people air is blown upper air outlet room temperature is equalized Air is blown from the upper and lower air outlets for high speed cooling during COOL operation and for filling the room with warm air during HEAT operation Regardless of the operation mode or situation air blow...

Page 35: ...tically operates again with the previous settings which were used before POWERFUL operation is displayed on the LCD Notes on POWERFUL operation POWERFUL operation cannot be used together with FORCED QUIET operation Priority is given to the function of whichever button is pressed last POWERFUL operation can only be set when the unit is running In COOL and HEAT operation To maximize the cooling heat...

Page 36: ...unit by changing the fan speed This function is convenient during night To start FORCED QUIET operation To cancel FORCED QUIET operation Notes on FORCED QUIET operation POWERFUL operation and FORCED QUIET operation cannot be used at the same time Priority is given to the function of whichever button is pressed last Cooling and heating capacity may be slightly lower than during normal operation 2 P...

Page 37: ...int you like Each pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setting rapidly and setting time disappear from the LCD and day of the week are displayed on the LCD The TIMER lamp goes off Notes on TIMER operation When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the mem...

Page 38: ... you like Example and setting time are displayed on the LCD is displayed on the LCD blinks and setting time disappear from the LCD and day of the week are displayed on the LCD The TIMER lamp goes off After a breaker has turned off After a power failure After replacing batteries in the remote controller A sample setting for combining the 2 timers is shown below Each pressing of either button increa...

Page 39: ...r 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 The same timer settings are made for the week from Monday through Friday while different timer settings are made for the weekend Use the copy mode to make settings for Tuesday to Friday because these settings are the same as those for Monday see page 22 Tuesday to Frida...

Page 40: ...ure the day of the week and time are set If not set the day of the week and time The day of the week and the reservation number of the current day will be displayed 1 to 4 settings can be made per day The day of the week and reservation number will be set and blink In case the reservation has already been set selecting blank deletes the reservation Go to step 9 if blank is selected The ON OFF TIME...

Page 41: ... at 18 C even if it is set at 10 to 17 C Heating The unit operates at 30 C even if it is set at 31 to 32 C To return to the time setting press The set temperature is only displayed when the mode setting is on The temperature will be set and go to the next reservation setting To continue further settings repeat the procedure from step 4 Be sure to direct the remote controller toward the indoor unit...

Page 42: ...ON OFF TIMER operation has priority if it is set while WEEKLY TIMER is still active The WEEKLY TIMER will go into standby state and will disappear from the LCD When ON OFF TIMER is up the WEEKLY TIMER will automatically become active Only the time and set temperature set with the weekly timer are sent with the Set the weekly timer only after setting the operation mode the fan strength and the fan ...

Page 43: ...rogram 3 Program 4 ON OFF ON OFF Monday Program 1 Program 2 Program 3 Program 4 ON OFF ON OFF COPY Press to confirm the day of the week to be copied Press to select the destination day of the week Tuesday to Friday 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 The whole reservation of the selected day of the week ...

Page 44: ...elected day of the week will be copied To continue copying settings to other days of the week repeat step 4 and step 5 is displayed on the LCD and WEEKLY TIMER operation is activated The entire reservation of the source day of the week is copied in the copy mode In the case of making a reservation change for any day of the week individually after copying the content of weekly reservations press an...

Page 45: ...y of the week and the reservation number of the current day will be displayed Pressing the displays the reservation details To change the confirmed reserved settings select the reservation number and press The mode is switched to setting mode Go to setting mode step 4 page 19 is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp lights up The will disappear from the LCD Th...

Page 46: ... display Refer to setting mode page 19 When selecting desired mode at step 4 in setting mode select blank The reservation will be deleted This function can be used for deleting reservations for each day of the week The reservation of the selected day of the week will be deleted Be sure to direct the remote control toward the main unit and check for a receiving tone This operation is not effective ...

Page 47: ...m 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 Check 49 5 1 How to Check 49 ...

Page 48: ...ollowing 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 When the settings of the operation mode are incompatible between the indoor unit and the hydrobox Refer to page 14 for detail Operation lamp green R12709 ...

Page 49: ...er and indoor unit are correct 79 Operation sometimes stops Check the power supply A power failure of 2 to 10 cycles stops air conditioner operation Operation lamp OFF Diagnose with remote controller indication 44 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor and outdoor units Correct the wiring and piping Check for the...

Page 50: ...hown below Note 1 A short beep pi and two consecutive beeps pi pi indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H8 27 P4 4 E6 16 H9 28 L3 5 H6 17 C9 29 L4 6 H0 18 C4 30 H7 7...

Page 51: ...eep or pi pi 3 Diagnose by the sound pi The figure of the ten s place does not accord with the error code pi pi The figure of the ten s place accords with the error code but the one s not beep The both figures of the ten s and one s place accord with the error code The figures indicated when you hear the beep sound are error code Refer to page 44 4 Press the MODE button The figure of the one s pla...

Page 52: ...ure of the ten s place accords with the error code but the one s not beep The both figures of the ten s and one s place accord with the error code 7 Determine the error code The figures indicated when you hear the beep sound are error code Error codes and description Refer to page 44 8 Press the MODE button to return to the normal mode Note When the remote controller is left untouched for 60 secon...

Page 53: ... 1 Error Codes and Description Error Codes Description Reference Page A1 Indoor unit PCB abnormality 45 A6 Fan motor DC motor or related abnormality 46 C4 Indoor heat exchanger thermistor or related abnormality 48 C9 Room temperature thermistor or related abnormality 48 ...

Page 54: ...tion of connector Troubleshooting Note Check the following connector Check the combination of the indoor and outdoor unit OK Check the connection of connectors See Note Correct the connection OK Error repeats YES NO NO YES NO YES R12745 Caution To secure the connection once disconnect the connector and then reconnect it Match the compatible models Replace the indoor unit PCB Replace the indoor uni...

Page 55: ...n is used to determine abnormal fan motor operation Malfunction Decision Conditions 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 Supposed Causes Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the fan moto...

Page 56: ... fan rotate smoothly Does the fan rotate Is the motor power supply voltage 310 340 VDC generated Is the motor control voltage 15 VDC generated Turn off the power supply and rotate the fan by hand Turn the power on and start operation Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 01 Check the output of the fan motor connector R12...

Page 57: ...compressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 06 Refer to P 50 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R7134 NO Check No 06 Check the thermistor resistance value YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Is it normal Is it normal Ch...

Page 58: ...nnector 2 Check the motor power supply voltage output pins 4 7 3 Check the motor control voltage pins 4 3 4 Check the rotation command voltage pins 4 2 5 Check the rotation pulse pins 4 1 7 6 5 4 3 2 1 S1 R12099 Motor power supply voltage 310 340 VDC Unused Unused GND Motor control voltage 15 VDC Rotation command voltage 1 6 VDC Rotation pulse ...

Page 59: ...ture and resistance is shown in the table and the graph below For the models in which the thermistor is directly mounted on the PCB disconnect the connector for the PCB and measure Thermistor temperature C Resistance kΩ 20 211 0 15 150 0 10 116 5 5 88 0 0 67 2 5 51 9 10 40 0 15 31 8 20 25 0 25 20 0 30 16 0 35 13 0 40 10 6 45 8 7 50 7 2 R25 C 20 kΩ B 3950 K Tester Resistance range R11906 kΩ 150 100...

Page 60: ...emoval 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 1 8 Removal of Indoor Heat Exchanger 71 1 9 Removal of Fan Rotor Fan Motor 72 ...

Page 61: ...ing off all power supplies before disassembling work Step Procedure Points 1 External appearance 2 Remove the front panel R6768 Slide the right and the left hooks to the center 1 Unfasten the 2 hooks on the top of the front panel 2 Open the front panel ON OFF R12437 ON OFF R12438 Operation lamp TIMER lamp Signal Receiver ON OFF switch ON OFF Front panel R12446 ON OFF R12447 ...

Page 62: ...Titanium apatite photocatalytic air purifying filter ASSY is attached to the back of the air filter 6 Release the string from the hook Lift up the front panel to unfasten the 3 hooks at the bottom and then remove the front panel Step Procedure Points ON OFF R12448 Air filter ON OFF R12449 R12450 Titanium apatite photocatalytic air purifying filter ASSY ON OFF R12451 Hook for the front panel String...

Page 63: ... grille and hook the string to prevent the front panel from dropping 7 Remove the 4 screws from the front grille 8 Pull out the front grille and remove it Open the horizontal blade to remove the front grille smoothly There are 3 hooks on the top of the main unit Step Procedure Points Hook for the air filter Hook for the front panel R12452 ON OFF R12453 Front grille R6775 ...

Page 64: ...all power supplies before disassembling work Step Procedure Points 1 2 Open the horizontal blade Release the center shaft 3 Bend the horizontal blade to release the right and the left shafts and remove the horizontal blade Release the left shaft first and then release the right shaft from the key alignment Horizontal blade R6778 Key alignment R6780 ...

Page 65: ...k Step Procedure Points 1 2 Remove the 2 earth screws Unfasten the hook and open the sensor PCB fixing plate 3 Remove the front shield plate 4 Remove the 1 screw of the wiring fixture and remove the 4 screws of the connection wires 5 Remove the screw and remove the terminal board Hook R12439 Earth screw Sensor PCB fixing plate R12440 Front shield plate Wiring fixture R12441 Connection wires R12442...

Page 66: ...b PCB 7 Release the harnesses 8 Remove the screw of the main electrical box The sub electrical box is screwed to the bottom frame at the back 9 Release the wiring from the clamp Remove the screw of the sub electrical box Step Procedure Points S42 S41 S1 S43 R12460 R12461 R12462 Main electrical box Clamp Screw Screw Screw R12470 Sub electrical box ...

Page 67: ... Procedure 58 10 Remove the main electrical box and the sub electrical box 11 Pull out the indoor heat exchaneopger thermistor Step Procedure Points R12753 Sub electrical box Main electrical box R12454 Indoor heat exchanger thermistor ...

Page 68: ...x 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 of the sub electrical box 2 Peel the tape 3 Unfasten the 2 hooks R12455 To main electrical box Sub electrical box R12486 R12465 ...

Page 69: ...pen the cover 5 Disconnect the connectors S10 S30 S40 S10 S30 control PCB S40 terminal board 6 Detach the 4 spacer with pliers 7 Remove the sub PCB Refer to page 7 for detail Step Procedure Points R12466 Cover R12467 S10 S30 S40 R12468 R12469 Sub PCB ...

Page 70: ...es before disassembling work Step Procedure Points 1 Remove the shield plate 1 Pull out the clamp 2 Unfasten the 8 hooks and remove the shield plate 2 Remove the PCBs 1 Unfasten the 2 hooks of the sensor PCB 2 Disconnect the connector S49 and remove the sensor PCB S49 control PCB Refer to page 7 for detail R12459 Hook Hook Hook Shield plate R12759 R12456 Sensor PCB R12457 S49 ...

Page 71: ...sconnect the connector S19 S19 sub PCB 4 Cut the clamp 5 Disconnect the connectors S26 S46 S48 S26 service PCB S46 display PCB S48 sensor PCB 6 Open and remove the lamp cover Step Procedure Points R12477 S19 R12478 R12479 S46 S48 S26 R12480 lamp cover ...

Page 72: ...gure shows the layout of the service PCB and the display PCB They are positioned at the back of the lamp cover 8 Unfasten the 2 hooks of the service PCB 9 Remove the service PCB Step Procedure Points R12471 Service PCB Display PCB R12475 Service PCB R12476 ...

Page 73: ...cedure 64 10 Unfasten the 2 hooks and remove the display PCB 11 12 Remove the 2 screws of the control PCB Unfasten the hook and remove the control PCB Refer to page 7 for detail Step Procedure Points R12464 Display PCB R12472 Hook R12474 ...

Page 74: ...turning off all power supplies before disassembling work Step Procedure Points 1 Disconnect the connector S42 and release the harness from the hook S42 swing motor 2 Remove the 2 screws and remove the air outlet ASSY 3 Remove the 2 screws and remove the swing motor R12482 S42 R12481 Screw Air outlet ASSY Screw R12487 Swing motor Shaft R12488 ...

Page 75: ... has 2 vertical blades ASSYs 5 Unfasten the 2 hooks and remove the vertical blades ASSY 6 Slide the protection net along the right and the left grooves and remove it Step Procedure Points Vertical blades ASSY R12483 Center hook Hook R12484 Groove Protection net R12485 ...

Page 76: ...wer Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Cut the 2 clamps 2 Disconnect the pipings 3 Remove the 2 screws R12498 Insulation material R12499 R12489 ...

Page 77: ...edure 68 4 Disconnect the drain hose Be careful not to wet the floor with drain 5 Disconnect the connector S41 S41 lower air outlet motor 6 Release the harness from the clamp Step Procedure Points Drain hose R12490 S41 R12754 Clamp R12748 ...

Page 78: ...l out the drain pan ASSY 9 Remove the motor cover Remove the 2 screws and remove the lower air outlet motor 10 Slide the damper to the opposite side of the motor and pull it out Step Procedure Points Hook R12491 R12492 Drain pan ASSY Lower air outlet motor R12493 Motor cover Damper R12751 ...

Page 79: ...he appearance after pressing the 2 hooks Appearance from rear side You can see the bottom of the vertical blades ASSY is detached from the drain pan 14 Unfasten the 3 hooks from front side with a flat screwdriver 15 Remove the vertical blades ASSY Step Procedure Points Bearing R12752 Thermal insulation Drain pan Bottom of vertical blades ASSY R12495 R12496 R12497 Vertical blades ASSY ...

Page 80: ...areful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect Note Do not use a metal saw for cutting pipes by all means because the sawdust comes into ...

Page 81: ...Step Procedure Points 1 Remove the fan rotor The screw has reverse winding Nut size M6 When reassembling align mark of the indoor fan with D cut section of the motor shaft 1 Remove the 4 screws and remove the bellmouth 2 Remove the nut and remove the fan rotor 2 Remove the fan motor 1 Release the harness of the fan motor from the hook Bellmouth R12503 10 mm R12236 Nut Fan rotor R12504 Hook R12443 ...

Page 82: ...2 hooks backward and remove the casing 1 Remove the 3 screws and unfasten the 2 hooks to remove the upper casing 2 Remove the 2 screws and unfasten the 2 hooks to remove the right casing or the left casing Press the 2 hooks backward and remove the casing Step Procedure Points Fan motor cover R12444 R12445 Hooks Fan motor Harness retainer Hook Upper casing R12746 Hook Right casing Hook Left casing ...

Page 83: ...ettings 74 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 ...

Page 84: ...he forced operation ON OFF button SW1 on the indoor unit for 5 seconds Operation Operation mode FAN Airflow rate H tap Water valve full open End The forced operation ends when any of the following conditions is fulfilled 1 The operation ends automatically after 15 minutes 2 Press the forced operation ON OFF button SW1 on the indoor unit again 3 Press the ON OFF button on the remote controller ON O...

Page 85: ...the temperature to a normal level 26 C to 28 C in cooling mode 20 C to 24 C in heating mode 3 The amount of the unit s water circulation should be 3 L min to 15 L min Caution If a special heat exchanger has been incorporated into the unit the water circulation should be within the range specified for that product If the water circulation is too low sediment may collect due to stagnation If too hig...

Page 86: ...he front panel and the air filter 2 While pressing the air purge valve with one hand turn the knob with other hand and open it 3 Make sure that air has been completely purged and then close the air purge valve securely Caution There is a risk of injury if you touch the heat exchanger with bare hand Be sure to close the air purge valve after purging air Leaving the air purge valve open may result i...

Page 87: ... 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 Heating cooling use Set the DIP switch to H C Heating only use Set the DIP switch to H O H C H O DIP switch R12707 ...

Page 88: ...e front grille 2 Lift the sensor PCB fixing plate and remove the front shield plate 3 Disconnect the connectors S1 S41 S42 4 Remove the electrical box 1 screw 5 Pull out the indoor heat exchanger thermistor 6 Remove the shield plate 8 tabs 7 Cut the address jumper JA on the indoor unit PCB 8 Cut the address jumper J4 in the remote controller 3 Connector S42 3 Connector S41 3 Connector S1 4 Remove ...

Page 89: ...s are cleared Switch Function OFF factory set ON SW2 1 Changeover between heating cooling use and heating only use Heating cooling use Heating only use SW2 2 Interlinked control with Altherma No interlinked control Set the switch to ON position to enable the interlinked control with Altherma when you connect a hydrobox whose series name is BA or later SW2 4 Upward airflow limit setting Exposed or ...

Page 90: ...SiBE611027_A 81 Appendix Part 9 Appendix 1 Piping Diagrams 82 2 Wiring Diagrams 82 ...

Page 91: ...WHT 1 PCB5 X11M 1 4 2 5 6 3 S42 RED MR10 1 t ORG F12U M S49 S48 YLW S21 M1S 125mA PNK BLK R1T BLU BLK 6 F11U PCB1 TRANSMISSION CIRCUIT 3 15A S41 RED 1 S30 S10 S40 ORG t M 2 4 4 1 1 1 YLW S32 M2S S19 S43 PNK 2 1 4 1 BLK BLU 5 R2T BLK BLK WHT BLK WHT NOTE RED BLU YLW indoor BRN NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN APPLICABLE MOD...

Page 92: ...l carefully before using this product The User s Manual provides important safety instructions and warnings Be sure to follow these instructions and warnings If you have any enquiries please contact your local importer distributor and or retailer Cautions on product corrosion 1 Air conditioners should not be installed in areas where corrosive gases such as acid gas or alkaline gas are produced 2 I...

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