Daikin Inverter FLKS25BVMB Service Manual Download Page 93

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Troubleshooting

SiBE05-513A

Service Diagnosis

Troubleshooting

Check No.06

Refer to P.115

Check No. 06

Indoor unit heat exchanger
thermistor check

Check the intake air filter.

Check the air passage.

YES

(R4695)

Check the dust accumulation on
the indoor unit heat exchanger.

YES

Is there any

short-circuit?

Is it very dirty?

Does it conform to

the thermistor characteristic

chart?

Provide sufficient air passage.

Clean the air filter.

Clean the heat exchanger.

Replace the indoor unit PCB.

Replace the thermistor
(replace the indoor unit PCB).

Caution

Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.

Summary of Contents for Inverter FLKS25BVMB

Page 1: ...Inverter Pair Floor Ceiling Suspended Dual Type B Series Applied Models zInverter Pair Cooling Only zInverter Pair Heat Pump SiBE05 513A ...

Page 2: ...r Unit FLKS25BVMB FLKS25BAVMB FLKS35BVMB FLKS35BAVMB Outdoor Unit RKS25DVMB RKS25D2VMB RKS25D3VMB RKS35DVMB RKS35D2VMB RKS35D3VMB zHeat Pump Indoor Unit FLXS25BVMB FLXS25BAVMB FLXS35BVMB FLXS35BAVMB Outdoor Unit RXS25DVMB RXS25D2VMB RXS25D3VMB RXS35DVMB RXS35D2VMB RXS35D3VMB ...

Page 3: ...n 23 1 6 Thermostat Control 24 1 7 NIGHT SET Mode 25 1 8 HOME LEAVE Operation 26 1 9 Inverter POWERFUL Operation 27 1 10 Other Functions 28 2 Function of Thermistor 29 2 1 Heat Pump Model 29 2 2 Cooling Only Model 30 3 Control Specification 31 3 1 Mode Hierarchy 31 3 2 Frequency Control 32 3 3 Controls at Mode Changing Start up 34 3 4 Discharge Pipe Control 35 3 5 Input Current Control 36 3 6 Free...

Page 4: ... 83 4 4 Fan Motor AC Motor or Related Abnormality 85 4 5 Thermistor or Related Abnormality Indoor Unit 86 4 6 Signal Transmission Error between Indoor and Outdoor Unit 87 4 7 Unspecified Voltage between Indoor and Outdoor Units 88 4 8 Outdoor Unit PCB Abnormality 89 4 9 OL Activation Compressor Overload 90 4 10 Compressor Lock 91 4 11 DC Fan Lock 92 4 12 Input Over Current Detection 93 4 13 Four W...

Page 5: ...Rotor Fan Motor 134 1 9 Removal of the Heat Exchanger 136 2 Outdoor Unit 138 2 1 Removal of Panels and Fan Motor 138 2 2 Removal of Electrical Box 145 2 3 Removal of Reactor and Partition Plate 147 2 4 Removal of Sound Blanket 149 2 5 Removal of Four Way Valve 151 2 6 Removal of Compressor 153 2 7 Removal of PCB 155 Part 8 Others 159 1 Others 160 1 1 Test Run from the Remote Controller 160 1 2 Jum...

Page 6: ... plug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the dischargi...

Page 7: ...the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating the equipment make sure that the new installation site has sufficient strength to withstand the weight of the equipment If the installation site does not have sufficient streng...

Page 8: ...ot be located and the repair work must be stopped be sure to perform pump down and close the service valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic gases when it contacts flames such as fan and other heaters stoves and ranges When replacing the coin battery in the remote controller be sure to disposed of the old batt...

Page 9: ...ng and repair it if the equipment is not properly grounded Improper grounding can cause an electrical shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet ...

Page 10: ...SiBE05 513A List of Functions 1 Part 1 List of Functions 1 List of Functions 2 ...

Page 11: ...and Left Worry Free Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 2 2 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operation Manua...

Page 12: ...ry Free Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 2 2 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operation Manual Intelligen...

Page 13: ...List of Functions SiBE05 513A 4 List of Functions ...

Page 14: ...SiBE05 513A Specifications 5 Part 2 Specifications 1 Specifications 6 1 1 Cooling Only 6 1 2 Heat Pump 8 ...

Page 15: ...Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 34 0 36 Power Consumption Rated W 74 78 Power Factor 94 6 94 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 566 1 100 280 566 1 100 280 Weight kg 16 16 Gross Weight kg 22 22 Oper...

Page 16: ... Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 34 0 36 Power Consumption Rated W 74 78 Power Factor 94 6 94 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 566 1 100 280 566 1 100 280 Weight kg 16 16 Gross Weight kg 22 22 Operation Sound H M...

Page 17: ...Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 32 0 34 0 36 0 36 Power Consumption Rated W 70 74 78 78 Power Factor 95 1 94 6 94 2 94 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 566 1 100 280 566 ...

Page 18: ...ontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 32 0 34 0 36 0 36 Power Consumption Rated W 70 74 78 78 Power Factor 95 1 94 6 94 2 94 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 566 1 100 280 566 1 100...

Page 19: ...Specifications SiBE05 513A 10 Specifications ...

Page 20: ...BE05 513A Printed Circuit Board Connector Wiring Diagram 11 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 12 1 1 Indoor Unit 12 1 2 Outdoor Unit 14 ...

Page 21: ... S27 S36 Connector for control PCB 6 S26 Connector for signal receiver PCB 7 S31 RTH Connector for room temperature thermistor 8 S32 Connector for heat exchanger thermistor 9 S37 Connector for power supply PCB 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function Refer to page 161 for detail 3 SW1 Operation switch 4 S...

Page 22: ... Diagram 13 PCB Detail PCB 1 Control PCB indoor unit PCB 2 Power Supply PCB indoor unit PCB 3 Display PCB PCB 4 Signal Receiver PCB SW2 S7 S6 S24 JC JB JA S37 S32 S26 S21 R2958 S36 FU1 V1 R2959 LED3 LED2 LED1 S25 R2960 SW1 PbF PHOTO 2P084377 1 SW1 I RTH WLU 3 C1 C2 C3 EX511 REV 12 S27 R4977 S31 RTH ...

Page 23: ... for electronic expansion valve coil 4 S30 Connector for compressor motor 5 S40 Connector for overload protector 6 S70 Connector for fan motor 7 S80 Connector for four way valve coil 8 S90 Connector for thermistors outdoor air heat exchanger discharge pipe 9 HC3 HC4 HL3 HN3 Connector for filter PCB 1 FU1 FU2 Fuse 3 15A 2 FU3 Fuse 20A 3 LED A Service monitor LED 4 V1 V2 V3 Varistor 5 J8 Facility se...

Page 24: ...nnector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 15 PCB Detail PCB 1 Filter PCB PCB 2 Control PCB outdoor unit FU3 20A S11 R4293 V3 V2 FU2 3 15A S30 HN3 HC3 S70 J8 HC4 R4605 S40 LED A S90 HL3 FU1 3 15A S80 V1 S20 S10 ...

Page 25: ...Printed Circuit Board Connector Wiring Diagram SiBE05 513A 16 Printed Circuit Board Connector Wiring Diagram ...

Page 26: ...rmistor 29 2 1 Heat Pump Model 29 2 2 Cooling Only Model 30 3 Control Specification 31 3 1 Mode Hierarchy 31 3 2 Frequency Control 32 3 3 Controls at Mode Changing Start up 34 3 4 Discharge Pipe Control 35 3 5 Input Current Control 36 3 6 Freeze up Protection Control 37 3 7 Heating Peak cut Control 37 3 8 Fan Control 38 3 9 Liquid Compression Protection Function 2 38 3 10 Defrost Control 39 3 11 E...

Page 27: ...explains the conversion principle Drawing of Inverter The following drawing shows a schematic view of the inverter principle Phase Description 1 The supplied AC power source is converted into the DC power source for the present 2 The DC power source is reconverted into the three phase AC power source with variable frequency When the frequency increases the rotation speed of the compressor increase...

Page 28: ...o air condition with a small room temperature variation Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following table shows the functions that define the minimum and maximum frequency Forced Cooling Operation For more information refer to Forced operation mode on page 44 6...

Page 29: ...o Swing Auto Swing The following table explains the auto swing process for heating cooling dry and fan up and down automatic right and left manual heating cooling dry fan ceiling floor R2963 95 6 5 4 0 2 0 R2964 R2965 45 45 R2966 9 5 65 R2967 40 20 R2968 45 45 ...

Page 30: ...tops during defrost operation 3 In time of thermostat OFF the fan rotates at the following speed Cooling The fan keeps rotating at the set tap Heating The fan keeps rotating at LLL tap Automatic Air Flow Control for Heating The following drawing explains the principle for fan speed control for heating Automatic Air Flow Control for Cooling The following drawing explains the principle of fan speed ...

Page 31: ... set by the microcomputer is divided into two zones Then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room temperature at startup Temperature ON point at which operation starts Frequency switching point Temperaturedifference for operation stop 24ºC Room temperature at startup 0 5ºC 1 5ºC 18ºC 18ºC 1 0ºC...

Page 32: ...ller setting temperature plus correction value correction value cooling 0 deg heating 2 deg 3 Operation ON OFF point and mode switching point are as follows Heating Cooling switching point Room temperature Main unit setting temperature 2 5 deg Cooling Heating switching point Room temperature Main unit setting temperature 2 5 deg Thermostat ON OFF point is the same as the ON OFF point of cooling or...

Page 33: ...perature difference is above the zone C after being in the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Heating B A OFF ON C Cooling 0 5 C Dry 0 5 C Room temperature setpoint Cooling 2 0 C Dry 2 5...

Page 34: ...ight Set circuit continues heating or cooling the room at the set temperature for the first one hour then automatically raises the temperature setting slightly in the case of cooling or lowers it slightly in the case of heating for economical operations This prevents excessive heating in winter and excessive cooling in summer to ensure comfortable sleeping conditions and also conserves electricity...

Page 35: ...ped the function becomes effective when the operation is started If this button is pressed in powerful operation the powerful operation is reset and this function becomes effective The HOME LEAVE button is ineffective in dry mode and fan mode 2 Details of Function A mark representing HOME LEAVE is indicated on the liquid crystal display of the remote controller The indoor unit is operated accordin...

Page 36: ...iod of twenty minutes Ex Powerful operation in cooling mode Operation mode Fan speed Target set temperature COOL H tap 50 rpm 18 C DRY Dry rotating speed 50 rpm Normally targeted temperature in dry operation Approx 2 5 C HEAT H tap 50 rpm 30 C FAN H tap 50 rpm AUTO Same as cooling heating in Powerful operation The target is kept unchanged R4674 Target temp Fan 50rpm Set temp 18 C Powerful ON Power...

Page 37: ...tic Deodorizing Filter Photocatalytic Deodorizing Filter demonstrates powerful oxidation characteristics when subjected to harmless ultraviolet light Photocatalytic deodorizing power is recovered simply by exposing the filter to the sun for 6 hours once every 6 months 1 10 5 Air Purifying Filter A double structure made up of a bacteriostatic filter and an Air Purifying Filter traps dust mildew mit...

Page 38: ...essor rises abnormally the operating frequency drops or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge thermistor C Indoor Heat Exchanger Thermistor DCN 1 The indoor heat exchanger thermistor is used for controlling target discharge temperature The system sets a target discharge temperature according to the outdoor and indoor heat exchanger...

Page 39: ...ontrolling temperature of the discharge pipe If the temperature of discharge pipe used in place of the inner temperature of the compressor rises abnormally the operating frequency drops or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge thermistor C Indoor Heat Exchanger Thermistor DCN 1 The indoor heat exchanger thermistor is used for contr...

Page 40: ...nd cooling including drying Note Unless specified otherwise an indoor dry operation command must be regarded as cooling operation Air conditioner control mode Forced operating mode Forced cooling for Pump Down Operation Normal operating mode Cooling Heating Defrosting Stop mode except for cooling heating modes by indoor command Preheat operation During C capacitor is discharging Stop R2829 Air con...

Page 41: ...pper limits of the following functions Compressor protection input current discharge pipes peak cutting freeze up protection defrost 3 Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions Four way valve operating compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency There is a...

Page 42: ...t volume air flow rate and other factors PI Control Determine Frequency Up Down by D Signal 1 P control Calculate D value in each sampling time 20 seconds and adjust the frequency according to its difference from the frequency previously calculated 2 I control If the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the D value obtaining...

Page 43: ...ch of the four way valve must be carried out after the operation stopped Detail The OFF delay of four way valve Energize the coil for 160 sec after unit operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline Heat Pump Only At the beginning of the operation as the four way valve is switched acquire the differential pressure required for activating the four way valve by having outp...

Page 44: ... Outline The discharge pipe temperature is used as the compressor s internal temperature If the discharge pipe temperature rises above a certain level the operating frequency upper limit is set to keep this temperature from going up further Detail Divide the Zone Management within the Zones FCG 3 FCG 2 FCG 1 TCG 1 TCG 2 TCG 3 88 64 48 240 360 180 Zone Control contents Stop zone When the temperatur...

Page 45: ...ed down by 2Hz every second until it reaches the steady zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is cancelled Stop zone After 2 5 s in this zone the compressor is stopped Limitation of current drooping and stop value according to the outdoor air temperature 1 In case the operation mode is cooling The current droops when outdoor air temperature becomes ...

Page 46: ... operation start Control in Each Zone 3 7 Heating Peak cut Control Outline Heat Pump Only During heating operation the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure The signal from the indoor unit must be divided as follows Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger tempera...

Page 47: ...owerful mode 9 Fan control for pressure difference upkeep Detail Fan OFF Control when Stopped Fan OFF delay for 60 seconds must be made when the compressor is stopped 3 9 Liquid Compression Protection Function 2 Outline In order to obtain the dependability of the compressor the compressor must be stopped according to the conditions of the temperature of the outdoor air and outdoor heat exchanger D...

Page 48: ... outdoor air temperature and heat exchanger temperature Under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 28 minutes of accumulated time pass since the start of the operation or ending the defrosting Conditions for Canceling Defrost The judgment must be made with heat exchanger temperature 4 C 22 C Frequency Compressor Four way val...

Page 49: ...Discharge pipe temperature control Detail The followings are the examples of control which function in each mode by the electronic expansion valve control R2833 Fully closed when power is turned ON Open control when starting Control of target discharge pipe temperature Pressure equalizing control Open control when starting Control of target discharge pipe temperature Defrost control FD 1 Pressure ...

Page 50: ...Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature If any is disconnected open the electronic expansion valve according to the outdoor air temperature and the operating frequency and operate for a specified time and then stop After 3 minutes of waiting restart the unit ...

Page 51: ...hift 3 11 8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger temperature and adjust the electronic expansion valve opening so that the actual discharge pipe temperature become close to that temperature Indirect SH control using the discharge pipe temperature Determine a correction value of the electronic expansion val...

Page 52: ... are three ways of control to detect insufficient gas I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as insufficient gas The power consumption is weak comparing with that in the normal operation when gas is insufficient and gas insufficiency is detected by checking a power consumption II...

Page 53: ...e is detected each time equipment operation starts Cooling room temperature indoor heat exchanger temperature 4 0 C outdoor heat exchanger temperature outdoor temperature 4 0 C Heating indoor heat exchanger temperature room temperature 3 0 C outdoor temperature outdoor heat exchanger temperature 3 0 C Item Forced Cooling Forced operation allowing conditions 1 The outdoor unit is not abnormal and n...

Page 54: ...temperature rises the operation will start again Caution 1 If the outdoor unit is installed where the heat exchanger of the unit is exposed to direct wind provide a windbreak wall 2 Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings 3 Do not place humidifiers or other items which might raise the humidity in rooms where faci...

Page 55: ...Control Specification SiBE05 513A 46 Function and Control ...

Page 56: ...y precautions 49 2 2 Names of parts 51 2 3 Preparation before Operation 54 2 4 AUTO DRY COOL HEAT FAN Operation 57 2 5 Adjusting the Air Flow Direction 59 2 6 POWERFUL Operation 61 2 7 OUTDOOR UNIT SILENT Operation 62 2 8 HOME LEAVE Operation 63 2 9 TIMER Operation 65 2 10 Care and Cleaning 67 2 11 Troubleshooting 70 ...

Page 57: ...lever 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 o...

Page 58: ...ing refrigerant check the content of the repairs with our service staff Do not attempt to install the air conditioner by your self Incorrect work will result in water leakage electric shocks or fire For installation consult the dealer or a qualified technician In order to avoid electric shock fire or injury if you detect any abnormally such as smell of fire stop the operation and turn off the brea...

Page 59: ...aves and other debris accumulate around the unit Leaves are a hotbed for small animals which can enter the unit Once in the unit such animals can cause malfunc tions smoke or fire when making contact with electrical parts Do not operate the air conditioner with wet hands Do not wash the indoor unit with excessive water only use a slightly wet cloth Do not place things such as vessels containing wa...

Page 60: ...scriptions contained in this man ual show the case when installation is being carried out to the ceiling The methods of operation used are the same when installing to a wall Opening the front grille How to open the front grille page 22 CAUTION Before opening the front grille be sure to stop the operation and turn the breaker OFF O N OFF 1 2 3 4 5 6 11 12 10 7 9 8 13 14 ...

Page 61: ...Push this switch once to start operation Push once again to stop it The operation mode refers to the following table Push the switch using an object with a sharp tip such as a pen This switch is useful when the remote controller is missing 14 Signal receiver It receives signals from the remote controller When the unit receives a signal you will hear a short beep Operation start beep beep Settings ...

Page 62: ...temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN page 10 8 OUTDOOR UNIT SILENT button page 15 9 FAN setting button It selects the air flow rate setting 10 SWING button page 12 11 ON TIMER button page 19 12 OFF TIMER button page 18 13 TIMER Setting button It changes t...

Page 63: ...same type and replace the two old batteries together When the system is not used for a long time take the batteries out We recommend replacing once a year although if the remote controller display begins to fade or if reception deteriorates please replace with new alkali batteries Using manganese batteries reduces the lifespan The attached batteries are provided for the initial use of the system T...

Page 64: ... unit 2 Fix the holder to a wall a pillar or similar location with the screws procured locally 3 Place the remote controller in the remote controller holder ATTENTION About remote controller Never expose the remote controller to direct sunlight Dust on the signal transmitter or receiver will reduce the sensitivity Wipe off dust with soft cloth Signal communication may be disabled if an electronic ...

Page 65: ... example in spring or autumn turn the breaker OFF Use the air conditioner in the following conditions Operation outside this humidity or temperature range may cause a safety device to disable the system C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT ON CANCEL OFF 1 3 2 Recommended temperature setting For cooling 26 C 28 For heating 20 C 24 C Mode Operating conditions If operation is...

Page 66: ...essing of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF button again Then OPERATION lamp goes off To change the temperature setting 4 Press TEMPERATURE adjustment button DRY or FAN mode AUTO or COOL or HEAT mode The temperature setting is not variable Press to raise the temperature and pre...

Page 67: ...the room After the start of heating operation it takes some time before the room gets warmer In heating operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit Note on DRY operation The computer chip works to rid the room of hum...

Page 68: ... to increase your com fort To adjust the horizontal blade flap 1 Press SWING button The display will light up and the flaps will begin to swing 2 When the flaps have reached the desired position press SWING button once more The display will go blank The flaps will stop moving C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT ON CANCEL OFF O N 1 2 ...

Page 69: ... selected you should set the flap at a near horizontal angle in COOL or DRY mode to obtain the best performance In COOL or DRY mode if the flap is fixed at a downward position the flap automatically moves in about 60 minutes to prevent condensation on it ATTENTION Always use a remote controller to adjust the flap angle If you attempt to move it forcibly with hand when it is swinging the mechanism ...

Page 70: ...POWERFUL operation there are some functions which are not available To cancel POWERFUL operation 2 Press POWERFUL button again NOTE Notes on POWERFUL operation In COOL and HEAT mode To maximize the cooling heating effect the capacity of outdoor unit must be increased and the air flow rate be fixed to the maximum setting The temperature and air flow settings are not variable In DRY mode The tempera...

Page 71: ...OOR UNIT SILENT operation 2 Press SILENT button again NOTE Note on OUTDOOR UNIT SILENT operation This function is available in COOL HEAT and AUTO modes This is not available in FAN and DRY mode POWERFUL operation and OUTDOOR UNIT SILENT operation cannot be used at the same time Priority is given to POWERFUL operation If operation is stopped using the remote controller or the main unit ON OFF switc...

Page 72: ... the first time please set the temperature and air flow rate for HOME LEAVE operation Record your preferred temperature and air flow rate 1 Press HOME LEAVE button Make sure is displayed in the remote control ler display 2 Adjust the set temperature with or as you like 3 Adjust the air flow rate with FAN setting button as you like Home leave operation will run with these settings the next time you...

Page 73: ...will be wel comed by a comfortably air condi tioned room Push the HOME LEAVE Operation button again and the air conditioner will adjust capacity to the set tem perature for normal operation Set the unit to HOME LEAVE Opera tion before leaving the living room when going to bed The unit will maintain the temper ature in the room at a comfortable level while you sleep When you enter the living room i...

Page 74: ...button changes the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL button The TIMER lamp goes off Notes When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote controller batteries are replaced When operating the unit via the ON OF...

Page 75: ...nges the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel ON TIMER operation 4 Press CANCEL button The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sample setting for combining the two timers is shown below ATTENTION In the following cases set the timer again After a breaker has turned OFF After a power failure After replacing batteries in the remote cont...

Page 76: ...e 5 points indicated by Operation without air filters may result in troubles as dust will accumulate inside the indoor unit CAUTION Units Don t touch the metal parts of the indoor unit If you touch those parts this may cause an injury When opening and closing the front grille use a robust and stable stool and watch your steps carefully When opening and closing the front grille support the grille s...

Page 77: ...t thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Air Purifying Filter green Replace approximately once every 3 months 1 Detach the filter element and attach a new one Insert with the green side up It is recommended to replace the air purifying filter every three months Photocatalytic Deodorizing Filter gray Maintenance 1 Dry the...

Page 78: ...this is the case Operation with dirty filters 1 cannot deodorize the air 2 cannot clean the air 3 results in poor heating or cooling 4 may cause odour The air purifying filter and Photocatalytic deodorizing filter cannot be reused even if washed In principle there is no need to replace the photocatalytic deodorizing filter Remove the dust peri odically with a vacuum cleaner However it is recommend...

Page 79: ...er or steam when the air conditioner is in defrost operation In COOL or DRY mode Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips Mists come out of the indoor unit This happens when the air in the room is cooled into mist by the cold air flow during cooling operation The indoor unit gives out odour This happens when smells of the room furniture or cigar...

Page 80: ...the windows and doors closed Are the air flow rate and the air direction set appropriately Operation stops suddenly OPERATION lamp blinks Are the air filters clean Is there anything to block the air inlet or the outlet of the indoor and the outdoor units Clean the air filters or take all obstacles away and turn the breaker OFF Then turn it ON again and try operating the air conditioner with the re...

Page 81: ...rrectly you will help to prevent potential negative consequences for the environment and human health Please contact the installer or local authority for more information Batteries must be removed from the remote controller and disposed of separately in accordance with relevant local and national legislation In certain operating conditions the inside of the air conditioner may get foul after sever...

Page 82: ...C9 FAULTY SUCTION AIR TEMPERATURE SENSOR OUTDOOR UNIT EA COOLING HEATING SWITCHING ERROR E5 OL STARTED E6 FAULTY COMPRESSOR START UP E7 DC FAN MOTOR FAULT E8 OPERATION HALT DUE TO DETECTION OF INPUT OVER CURRENT F3 HIGH TEMPERATURE DISCHARGE PIPE CONTROL F6 HIGH PRESSURE CONTROL IN COOLING H6 OPERATION HALT DUE TO FAULTY POSITION DETECTION SENSOR H8 CT ABNORMALITY H9 FAULTY SUCTION AIR TEMPERATURE...

Page 83: ...Instruction SiBE05 513A 74 System Configuration ...

Page 84: ...Indoor and Outdoor Units 88 4 8 Outdoor Unit PCB Abnormality 89 4 9 OL Activation Compressor Overload 90 4 10 Compressor Lock 91 4 11 DC Fan Lock 92 4 12 Input Over Current Detection 93 4 13 Four Way Valve Abnormality 94 4 14 Discharge Pipe Temperature Control 96 4 15 High Pressure Control in Cooling 97 4 16 Compressor System Sensor Abnormality 99 4 17 Position Sensor Abnormality 100 4 18 DC Volta...

Page 85: ...operation 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Location of Operation Lamp Troubleshooting with the LED Indication The outdoor unit has one green LED LED A on the PCB The flashing green LED indicates normal condition of microcomputer operation O N OFF R2974 Air Outlet Indicator...

Page 86: ...y for heat pump model and cooling operation cannot be used when the outdoor air temperature is below 10 C Diagnosis with remote controller indication 81 Equipment operates but does not cool or does not heat only for heat pump model Check for wiring and piping errors in the indoor and outdoor units connection wires and pipes Conduct the wiring piping error check described on the product diagnosis n...

Page 87: ... sequence shown below and notifies with a long beep Note 1 A short beep and two consecutive beeps indicate non corresponding codes 2 To cancel the code display hold the timer cancel button down for 5 seconds The code display also cancels itself if the button is not pressed for 1 minute No Code No Code No Code 1 OO 12 C7 23 HO 2 U4 13 H8 24 E1 3 F3 14 J3 25 P4 4 E6 15 A3 26 L3 5 L5 16 A1 27 L4 6 A6...

Page 88: ...nk 2 Press the TEMP button Press TEMP or TEMP and change the digit until you hear the sound of beep or pi pi 3 Diagnose by the sound pi The number of tens does not accord with the error code pi pi The number of tens accords with the error code beep The both numbers of tens and units accord with the error code See 7 4 Enter the diagnosis mode again Press the MODE button The digit of the number of u...

Page 89: ...both numbers of tens and units do not accord with the error code pi pi The number of tens accords with the error code beep The both numbers of tens and units accord with the error code 7 Determine the error code The digits indicated when you hear the beep sound are error code Error codes and description Refer to page 81 8 Exit from the diagnosis mode Press the MODE button R4277 R4278 ...

Page 90: ...ture thermistor abnormality 86 Outdoor Unit E1 Outdoor unit PCB abnormality 89 E5 OL activation compressor overload 90 E6 Compressor lock 91 E7 DC fan lock 92 E8 Input over current detection 93 EA Four way valve abnormality 94 F3 Discharge pipe temperature control 96 F6 High pressure control in cooling 97 H0 Compressor system sensor abnormality 99 H6 Position sensor abnormality 100 H8 DC voltage c...

Page 91: ...o zero cross detection in approximately 10 continuous seconds Supposed Causes Faulty indoor unit PCB Faulty connector connection Troubleshooting Note Connector Nos vary depending on models Connector connection check note YES Is it normal NO Correct connections Replace PCBs R1400 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Model Ty...

Page 92: ... according to the temperature detected by the indoor unit heat exchanger thermistor Malfunction Decision Conditions High pressure control During heating operations the temperature detected by the indoor heat exchanger thermistor is above 65 C Freeze up protection When the indoor unit heat exchanger temperature is below 0 C during cooling operation Supposed Causes Operation halt due to clogged air ...

Page 93: ...cumulation on the indoor unit heat exchanger YES YES Is there any short circuit Is it very dirty Is it very dirty Does it conform to the thermistor characteristic chart NO Provide sufficient air passage Clean the air filter Clean the heat exchanger Replace the indoor unit PCB Replace the thermistor replace the indoor unit PCB Caution Be sure to turn off power switch before connect or disconnect co...

Page 94: ... due to faulty indoor unit PCB Troubleshooting Check No 16 Refer to P 119 Rotate the fan by hand Check No 16 Check Hall IC Operate the fan Does it rotate NO Does it rotate smoothly Is there an output Is it at the rated voltage Is there conductivity NO Check the capacitor s conductivity Check the fan motor voltage immediately after re start Is it at the rated voltage Check the fan motor voltage NO ...

Page 95: ...ss than 120 ohms or below about 50 C more than 1 860 kohms Note The values vary slightly in some models Supposed Causes Faulty connector connection Faulty thermistor Faulty PCB Troubleshooting Check No 06 Refer to P 115 C4 Heat exchanger thermistor C9 Room temperature thermistor Check the connector connection YES Correct the connection Replace the thermistor Replace the indoor unit PCB Replace the...

Page 96: ...nal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units wire No 2 Troubleshooting Check No 10 Refer to P 117 Check the outdoor unit s LED A Check the indoor unit outdoor unit connection wires YES YES Correct the indoor unit outdoor unit connection wires Diagnose the outdoor unit Replace the connection wires between the indoor and outdoor units Re...

Page 97: ...e for the specified PCB 1 or 2 Replace the indoor unit PCB 1 or the outdoor unit PCB Q0347 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Indoor unit and outdoor unit matched NO YES YES Matched compatibly NO Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Check the indoor and outdoor ...

Page 98: ...ndoor and outdoor unit model numbers Match the compatible models Change for the specified PCB 1 or 2 Replace the indoor unit PCB 1 or the outdoor unit PCB Q0347 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Indoor unit and outdoor unit matched NO YES YES Matched compatibly NO Check the code numbers 2P01234 for example of the indoor ...

Page 99: ...eshooting Check No 04 Refer to P 113 Check No 05 Refer to P 114 Check No 06 Refer to P 115 Check No 11 Refer to P 117 Insert the thermistor in position Replace the discharge pipe thermistor Replace the valve itself or the coil Replace the four way valve coil or the valve itself Replace the outdoor unit PCB Refer to the refrigerant line check procedure Replace the outdoor unit PCB R4697 Caution Be ...

Page 100: ...upposed Causes Compressor locked Compressor harness disconnected Troubleshooting Note If the model doesn t have SPM replace the outdoor unit PCB Turn off the power Disconnect the harnesses U V and W Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB Replace the compressor Check the electronic expansion valve Replace it as required Replace the ...

Page 101: ...n for about 10 minutes normal Supposed Causes Fan motor breakdown Harness or connector disconnected between fan motor and PCB or in poor contact Foreign matters stuck in the fan Troubleshooting Check No 15 Refer to P 118 Turn off the power and reconnect the connector Remove Replace the outdoor unit fan motor Replace the outdoor unit PCB R2843 Caution Be sure to turn off power switch before connect...

Page 102: ...have SPM replace the outdoor unit PCB Replace the outdoor unit PCB Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB R4698 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Input current flowing above its stop level NO YES Any LED off YES NO Check with the inverter checker Turn off...

Page 103: ...ecked to see if they function within their normal ranges in the operating mode Malfunction Decision Conditions A following condition continues over 10 minute after operating 5 minutes Cooling dry operation room temp indoor heat exchanger temp 5 C Heating indoor unit heat exchanger temp room temp 5 C Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Four way ...

Page 104: ...ower switch before connect or disconnect connector or parts damage may be occurred Four way valve coil disconnected loose YES YES NO Functioning NO Check No 11 Check the refrigerant line Malfunctioning z Insufficient gas z Water mixed z Stop valve defective Harness out of connector NO YES Disconnect the harness from the connector Resistance between harnesses about 3kΩ 0 5kΩ Malfunctioning Function...

Page 105: ...r or outdoor air temperature thermistor defective Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defective Troubleshooting Check No 04 Refer to P 113 Check No 06 Refer to P 115 Check No 11 Refer to P 117 Stop temperatures 1 above 45Hz rising above 40Hz dropping 110 97 2 30 45Hz rising 25 40Hz dropping 105 92 3 below 30Hz rising below 25Hz...

Page 106: ...ng sensed by the heat exchanger thermistor exceeds the limit Malfunction Decision Conditions Activated when the temperature being sensed by the heat exchanger thermistor rises above 65 C The error is cleared when the temperature drops below 54 C Supposed Causes The installation space is not large enough Faulty outdoor unit fan Faulty electronic expansion valve Faulty defrost thermistor Faulty outd...

Page 107: ...r the connector or fan motor lead wires Replace the heat exchanger thermistor Replace PCB Replace the electronic expansion valve or coil Replace the PCB Change the air outlet grille position Change the installation location Clean the heat exchanger Check the installation space Check No 09 Outdoor fan check Judgment Check No 06 Heat exchanger thermistor check Judgment Check No 07 Installation condi...

Page 108: ... 5 4 5 V sensor output converted to voltage value or if the DC voltage before compressor start up is below 50 V Supposed Causes PCB defective Broken or poorly connected harness Troubleshooting Check the harness S30 Replace the harness No problem Keep on running Replace the PCB 2 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Is the h...

Page 109: ...e disconnected Compressor itself defective Outdoor unit PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check No 13 Refer to P 118 Replace the outdoor unit PCB Replace the outdoor unit PCB Reconnect as specified Inverter checker Part No 1225477 Correct the power supply or replace the outdoor unit PCB Replace the compressor R3041 Caution Be sure to turn off power ...

Page 110: ...cision Conditions The compressor running frequency is below 52 Hz The input current is also below 0 5 A If this error repeats 4 times the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Outdoor unit PCB defective Troubleshooting Replace the outdoor unit PCB Cauti...

Page 111: ...erature Malfunction Decision Conditions The thermistor input is above 4 96 V or below 0 04 V with the power on Error J3 is judged if the discharge pipe thermistor temperature is smaller than the condenser thermistor temperature Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Indoor unit PCB defective Condenser thermistor defective in the case of J3 error o...

Page 112: ...t exchanger thermistor z Outdoor air thermistor Replace the following thermistor z Indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB R4702 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again on remote controller NO YES YES YES NO Indoor heat exchanger thermistor functioning NO ...

Page 113: ...ecking the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 80 C Reset is made when the temperature drops below 70 C Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connector in poor contact Outdoor unit PCB defecti...

Page 114: ...Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error again or outdoor unit fan activated YES z Fin thermistor NO Slightly dirty Check No 09 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too dirty Functioning Thermistor as specified in its characteristic chart Above 80 C NO YES NO YES Check the radiation fin...

Page 115: ... radiation fin temperature with the compressor on is above 90 C If a radiation fin temperature rise takes place 4 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin temperature rise du...

Page 116: ...B or the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R4704 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again YES NO Slightly dirty Check No 09 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too di...

Page 117: ... is running An output over current input is fed from the output over current detection circuit to the microcomputer The system will be shut down if the error occurs 255 times Clearing condition Continuous run for about 10 minutes normal Supposed Causes Over current due to defective power transistor Over current due to wrong internal wiring Over current due to abnormal supply voltage Over current d...

Page 118: ... have been disconnected and reconnected for part replacement for example and the system is interrupted by an output over current take the following procedure Error again NO YES NO YES Voltage as rated YES NO Short circuit or breakage between compressor s coil phases NO YES Normal YES NO Any LED off Turn off the power and turn it on again to get the system started See if the same error occurs Turn ...

Page 119: ...nditions continue for 80 seconds Target opening of the electronic expansion valve 480 pulse Discharge temperature 255 256 target discharge temperature 30 C Gas shortage detection III When the difference of the temperature is smaller than it is regarded as insufficient gas If a gas shortage error takes place 4 times straight the system will be shut down The error counter will reset itself if this o...

Page 120: ...nit heat exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R4706 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Any thermistor disconnected YES Malfunctioning NO Stop valve closed NO YES YES NO Gas shortage error again Functioning Check No 06 Check the thermistors YES NO Oil oozing at internal piping ...

Page 121: ...on Continuous run for about 10 minutes normal Supposed Causes Supply voltage not as specified Over voltage detection circuit defective PAM control part s defective Troubleshooting Note If the model doesn t have SPM replace the outdoor unit PCB Check the supply voltage Correct the power supply Check for such factors for a long term Replace the SPM Replace the outdoor unit PCB R2957 Caution Be sure ...

Page 122: ...ity using a tester Check the conductivity between pins 1 3 and 6 and between pins 2 4 and 5 If there is no conductivity between the pins the EV coil is faulty 4 If no EV generates latching sound in the above step 2 the outdoor unit PCB is faulty 5 If the conductivity is confirmed in the above step 2 mount a good coil which generated latching sound in the EV unit that did not generate latching soun...

Page 123: ...unit PCB Replace the four way valve coil Replace the four way valve R3047 NO Four way valve coil Cooling dry No continuity Heating Continuity YES YES Four way valve coil resistance at 3kΩ 0 5kΩ NO S80 voltage at DC 180 220 V with compressor on Fig 1 Disconnect the four way valve coil from the connector and check the continuity Fig 1 Voltage at S80 DC180 220V ON Compressor Time ...

Page 124: ...ors on the PCB and measure the resistance of each thermistor using tester The relationship between normal temperature and resistance is shown in the graph and the table below Thermistor R25 C 20kΩ B 3950 Temperature C 20 211 0 kΩ 15 150 10 116 5 5 88 0 67 2 5 51 9 10 40 15 31 8 20 25 25 20 30 16 35 13 40 10 6 45 8 7 50 7 2 ...

Page 125: ... by the outdoor unit The outside air temperature shall be 43 C or lower Check the allowable dimensions of the air suction and discharge area Is the air flow blocked by obstacles or winds blowing in the opposite direction R1438 Abnormal YES YES YES Does the discharged air from other outdoor unit cause an increase of the suction air temperature NO NO NO Is the heat exchanger very dirty Discharge pre...

Page 126: ... 5 1 8 Inverter Units Refrigerant System Check Check No 11 Check the outdoor unit fan system Reconnect R2857 Outdoor unit fan running YES Fan motor lead wire connector disconnected YES NO NO Outdoor unit fan system functioning Go to Check No 15 Fig 1 Fig 2 Refrigerant system check Check for gas leaks See the section on insufficient gas detection Conduct the check after operating the equipment for ...

Page 127: ...r off and disconnect the connector S70 2 Make sure there is about DC 270 V between pins 4 and 7 3 With the system and the power still off reconnect the connector S70 4 Make a turn of the fan motor with a hand and make sure the pulse 0 15 V appears twice at pins 1 and 4 If the fuse is blown out the outdoor unit fan may also be in trouble Check the fan too If the voltage in Step 2 is not applied it ...

Page 128: ...ON operation OFF and the connector connected check the following Output voltage of about 5 V between pins 1 and 3 Generation of 3 pulses between pins 2 and 3 when the fan motor is operating Failure of 1 Æ faulty PCB Æ Replace the PCB Failure of 2 Æ faulty hall IC Æ Replace the fan motor Both 1 and 2 result Æ Replace the PCB ...

Page 129: ...Check SiBE05 513A 120 Service Diagnosis ...

Page 130: ... 1 5 Removal of the Discharge Grille 129 1 6 Removal of the Drain Pan 130 1 7 Removal of the Electrical Box PCB 131 1 8 Removal of the Fan Rotor Fan Motor 134 1 9 Removal of the Heat Exchanger 136 2 Outdoor Unit 138 2 1 Removal of Panels and Fan Motor 138 2 2 Removal of Electrical Box 145 2 3 Removal of Reactor and Partition Plate 147 2 4 Removal of Sound Blanket 149 2 5 Removal of Four Way Valve ...

Page 131: ...ure Points 1 Features Ceiling suspended type and floor mounted type are provided Explanation will be given by taking the ceiling suspended type as an example Notes Removal procedure for the floor mounted type is same as the ceiling suspended type 2 Remove the air filters 1 Pull protrusions on left and right sides with fingers and open the front grille R2977 TIMER lamp yellow Operation lamp green O...

Page 132: ...ilter frame pull the air filter forward 3 Remove the air filter by pulling along the slide guide Installing filters can be done easily by sliding in along the slide guide 3 Remove the front grille 1 Disengage the two hooks left and right sides using screw driver Step Procedure Points ...

Page 133: ...hooks at three locations 4 Remove the side panel cover 1 Remove the side panel cover for removing of suspension parts Note If it is difficult to remove side panel from outside with finger remove front panel first then push side panel from inside of unit to outside Step Procedure Points ...

Page 134: ... more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the four screws located at the back of the front panel Notes For the ceiling suspended type remove drain hose before removing the screws 2 Remove the three screw covers at the front of the front panel 3 Remove the three screws ...

Page 135: ...5 Press A section slightly at the center of the front panel and disengage hook 6 Remove the front panel Caution For ceiling suspended type be careful that the front panel may fall when hooks are disengaged To prevent the front panel from falling down this service work should be done by two persons Step Procedure Points ...

Page 136: ...minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Open the horizontal blade 2 Deflect the three center bearings to left side slightly and disengage shaft of blade 3 Bend the blade slightly to disengage shafts from bearings at both ends Remove the left side shaft first ...

Page 137: ...disassembling work Step Procedure Points 1 Remove the signal receiver unit 1 Disengage the two hooks left and right sides to remove the signal receiver unit 2 Remove the wire harness of the signal receiver from the groove Note Rearrange the wire harness in position as it was when reassembling signal receiver unit 2 Remove the swing motor 1 Remove the two screws holding the swing motor in place ...

Page 138: ...rocedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the two screws securing discharge grille 2 Disengage the two hooks left and right sides and remove the discharge grille by pulling forward ...

Page 139: ...er supplies before disassembling work Step Procedure Points 1 Disconnect the drain hose Caution Be careful not to wet the floor with drain water 2 Remove the three screws securing the suction side of the drain pan 3 Disengage the two hooks located at both left and right sides of discharge port 4 Slide the drain pan toward the suction side and remove it ...

Page 140: ... Procedure Points 1 Remove the PCB Clamp harnesses and wires with clips as they were when reassembling Negligence of above procedure may result in catching wire with front cover and causes malfunction 1 Disconnect the earth wire and the indoor heat exchanger thermistor harness 2 Remove the two connection wirings at the rear side of the fan motor 3 Remove the electrical box cover Disengage the two ...

Page 141: ...t SiBE05 513A 132 Removal Procedure 4 The illustration shows the control PCB indoor unit 5 Disconnect the terminals from the terminal strip board Step Procedure Points SW2 S7 S6 S24 JC JB JA S37 S32 S26 S21 R2958 ...

Page 142: ... power supply PCB indoor unit 2 Remove the electrical box Slide the box to direction first to disengage hooks 1 Remove the two screws Remove the electrical box by sliding it to disengage the hooks located at the opposite side of the box Step Procedure Points S36 FU1 V1 R2959 ...

Page 143: ...re after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the three fan rotor covers Securing hooks are located at A and B section The right illustration shows the opposite side 2 Disconnect the two connection wirings located at the rear side of the fan motor and unclamp the harness from the clip ...

Page 144: ...it Removal Procedure 135 3 Remove the two screws to remove fan motor fixtures 4 Remove the bearing fixture 5 Loosen the shaft supporting section using a hexagonal wrench for M6 to remove the fan motor Step Procedure Points ...

Page 145: ...e disassembling refrigerant pipe To prevent the heat exchanger from falling down the service work should be done by two persons 1 Disconnect the pipe at the heat exchanger side for the auxiliary flexible tube 2 Remove the two screws for piping fixture Caution When removing or reinstalling heat exchanger be sure to wear protective gloves or wrap heat exchanger with cloths Fins can cut fingers 3 Rem...

Page 146: ...n refrigerating cycle and this results in pipe breakage or personal injuries Warning If gas leaks repair the spot of leaking then collect all refrigerant from the unit After conducting vacuum drying and charge proper amount of refrigerant Caution When removing or reinstalling heat exchanger be sure to wear protective gloves or wrap the heat exchanger with cloths Fins can cut fingers 5 Remove screw...

Page 147: ...ore after turning off all power supplies before disassembling work Step Procedure Points 1 Features Take care not to cut your finger by the fins of the heat exchanger The stop valve cover is united with the shelter When reassembling make sure to fit the 5 hooks 1 Loosen the screw of the stop valve cover Pull down the stop valve cover and remove it ...

Page 148: ... the panels 1 Loosen the 3 screws front right left and lift the top panel 2 Remove the drip proof plate 3 Disconnect the connector for fan motor S70 The fan motor is united with the front panel 4 Loosen the 5 screws of the front panel Step Procedure Points ...

Page 149: ...s 4 hooks The fan motor is united with the front panel 3 Remove the fan motor The screw has reverse winding 1 Unscrew the washer fitted nut M10 of the propeller fan with a spanner 2 Remove the propeller fan Align mark of the propeller fan with D cut section of the motor shaft when reassembling Step Procedure Points ...

Page 150: ...ft the bell mouth to undo the hooks Remove the bell mouth 4 Loosen the fixing hooks and release the lead wire Put the lead wire through the back of the motor when reassembling so as not to be entangled with the propeller fan Step Procedure Points R3249 Lead wire Propeller fan ...

Page 151: ...Outdoor Unit SiBE05 513A 142 Removal Procedure 5 Loosen the 4 screws to remove the fan motor M4 16 DC fan motor 6 Loosen the 2 screws to remove the fan motor fixing frame Step Procedure Points ...

Page 152: ...or Unit Removal Procedure 143 4 Remove the right side panel 1 Loosen the 2 screws on the rear side 2 Loosen the 3 screws on the right side 3 Loosen the screw and lift the connection port to remove Step Procedure Points ...

Page 153: ...Outdoor Unit SiBE05 513A 144 Removal Procedure When reassembling make sure to fit the hook Step Procedure Points ...

Page 154: ...plies before disassembling work Step Procedure Points Remove the top panel Disconnect the connector for fan motor 1 Remove the electrical box 1 Disconnect the 2 reactor harnesses 2 Disconnect the relay connector for compressor lead wire 3 Disconnect the connector for four way valve S80 When reassembling coil the excessive lead wire and hang the loop on the hook ...

Page 155: ...cedure 4 Release the discharge pipe thermistor Pay attention so as not to lose the clip for thermistor 5 Release the heat exchanger thermistor Pay attention so as not to lose the clip 6 Lift and remove the electrical box Step Procedure Points ...

Page 156: ...re Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the outer panels Remove the electrical box 1 Remove the reactor 1 Loosen the screw Lift and remove the reactor 2 Remove the partition plate 1 Loosen the 2 screws ...

Page 157: ...it SiBE05 513A 148 Removal Procedure 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedure Points ...

Page 158: ...lies before disassembling work Step Procedure Points Remove the outer panels Remove the electrical box 1 Remove the sound blanket 1 Untie the strings and open the sound blanket 2 Lift and remove the sound blanket body as it is opened Since the piping ports on the sound blanket are torn easily remove the blanket carefully 3 Lift and remove the sound blanket top ...

Page 159: ...SiBE05 513A 150 Removal Procedure 4 Pull the sound blanket inner out Since the piping ports on the sound blanket are torn easily remove the blanket carefully 5 Pull the sound blanket bottom out Step Procedure Points ...

Page 160: ...r turning off all power supplies before disassembling work Step Procedure Points 1 Remove the peripheries Remove the four way valve and the sheets of putty so as not to burn them 1 Remove the terminal cover Be careful so as not to burn the compressor terminals or the name plate Make notes 2 Loosen the screw of the four way valve coil ...

Page 161: ... a tube cutter 4 Heat up the brazed part and withdraw the piping with pliers Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Be careful so as not to break the pipes by pressing it excessively by pliers when withdrawing it Step Procedure Points ...

Page 162: ...to burn the heat exchanger fin Warning Since it may happen that refrigeration oil in the compressor will catch fire prepare wet cloth so as to extinguish fire immediately In case of the difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit by a miniature copper tube cutter in order to make it easy to disconnect Caution...

Page 163: ...Outdoor Unit SiBE05 513A 154 Removal Procedure Step Procedure Points 3 Heat up the brazed part of the suction side and disconnect 4 Lift the compressor up and remove it ...

Page 164: ...ning off all power supplies before disassembling work Step Procedure Points 1 Remove the PCB You can remove the PCB when you disconnect the read wires on the terminal board without removing the electrical box PbF Pb free brazing is adopted 1 Feature of the PCB 2 Loosen the screw on the terminal board 3 Release the earth terminal ...

Page 165: ...Outdoor Unit SiBE05 513A 156 Removal Procedure 4 Loosen the 4 screws 5 Undo the 3 hooks on the upper side 6 Lift and pull out the PCB Step Procedure Points ...

Page 166: ...SiBE05 513A Outdoor Unit Removal Procedure 157 7 Feature of the PCB S70 fan motor S80 four way valve S90 thermistor outdoor air heat exchanger discharge pipe See page 15 for detail Step Procedure Points ...

Page 167: ...Outdoor Unit SiBE05 513A 158 Removal Procedure ...

Page 168: ...SiBE05 513A Others 159 Part 8 Others 1 Others 160 1 1 Test Run from the Remote Controller 160 1 2 Jumper Settings 161 ...

Page 169: ...on and Testing 1 Measure the supply voltage and make sure that it falls in the specified range 2 Trial operation should be carried out in either cooling or heating mode 3 Carry out the test operation in accordance with the Operation Manual to ensure that all functions and parts such as louver movement are working properly The air conditioner requires a small amount of power in its standby mode If ...

Page 170: ...2 places indicated and remove the electric component cover 5 Cut the address jumper JA on the control PCB Wireless remote controller 1 Slide the front cover and take it off 2 Cut the address jumper J4 1 2 2 Jumper Setting ADDRESS JA EXIST 1 CUT 2 J4 EXIST 1 CUT 2 J4 Wireless remote controller CEILING FLOOR SW2 ADDRESS R4975 Jumper On indoor control PCB Function When connected factory set When cut ...

Page 171: ...Others SiBE05 513A 162 Others ...

Page 172: ...SiBE05 513A Appendix 163 Part 9 Appendix 1 Piping Diagrams 164 1 1 Indoor Units 164 1 2 Outdoor Units 165 2 Wiring Diagrams 167 2 1 Indoor Units 167 2 2 Outdoor Units 167 ...

Page 173: ...AVMB FLXS35BAVMB FIELD PIPING FIELD PIPING 9 5CuT 6 4CuT REFRIGERANT FLOW COOLING INDOOR UNIT 6 4CuT SIROCCO FAN 9 5CuT FAN MOTOR M HEAT EXCHANGER THERMISTOR ON HEAT EXCH 4D034012E FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT INDOOR UNIT 6 4CuT SIROCCO FAN 9 5CuT FAN MOTOR M 4D048722A HEAT EXCHANGER THERMISTOR ON HEAT EXCH REFRIGERANT FLOW COOLING HEATING ...

Page 174: ...IPING 6 4CuT 9 5CuT REFRIGERANT FLOW COOLING DISCHARGE PIPE THERMISTOR MUFFLER 7 9CuT FOUR WAY VALVE NORMALLY OFF COMPRESSOR 9 5CuT ACCUMULATOR 7 9CuT 9 5CuT PROPELLER FAN 9 5CuT 9 5CuT 7 0CuT 7 0CuT OUTDOOR UNIT HEAT EXCHANGER 4 8CuT 4 8CuT HEAT EXCHANGER THERMISTOR MUFFLER WITH FILTER OUTDOOR TEMPERATURE THERMISTOR 6 4CuT 6 4CuT MUFFLER WITH FILTER MOTOR OPERATED VALVE MUFFLER WITH FILTER 6 4CuT...

Page 175: ...TOR 6 4CuT 6 4CuT MUFFLER WITH FILTER MOTOR OPERATED VALVE φ 4 0 ID 2 0CuT OUTDOOR UNIT MUFFLER WITH FILTER 6 4CuT REFRIGERANT FLOW COOLING HEATING 3D047315A M 9 5CuT DISCHARGE PIPE THERMISTOR MUFFLER PROPELLER FAN 7 9CuT 7 9CuT COMPRESSOR FOUR WAY VALVE ON HEATING 9 5CuT ACCUMULATOR 9 5CuT 9 5CuT 7 0CuT 7 0CuT OUTDOOR UNIT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR OUTDOOR TEMPERATURE THERMISTOR 4 ...

Page 176: ... C74 C75 IC11 DB1 DB2 MRCW MRM10 MRM20 FU1 FU2 FU3 C94 C95 C100 2 3 1 FIELD WIRING L N X1M INTELLIGENT POWER MODULE TRIAC FUSE LIVE COIL CAPACITOR REACTOR MAGNETIC RELAY COMPRESSOR MOTOR FAN MOTOR DIODE BRIDGE 2 3 1 RED BLK WHT GRN YLW Z2C GRN YLW HN1 HL1 E S FU3 20A V2 PCB1 V3 N SA1 Q1L PCB1 PCB2 S30 S40 S70 HC3 HC4 HL3 HN3 S80 S90 S91 R1T R2T R3T R12T S10 S11 S20 L1 outdoor S80 TYPE COOLING ONLY...

Page 177: ...Wiring Diagrams SiBE05 513A 168 Appendix ...

Page 178: ...k 118 check No 04 113 check No 05 114 check No 06 115 check No 07 116 check No 08 116 check No 09 117 check No 10 117 check No 11 117 check No 13 118 check No 15 118 check No 16 119 compressor 153 compressor lock 91 compressor overload 90 compressor protection function 35 compressor system sensor abnormality 99 connectors 12 14 control PCB indoor unit 13 132 control PCB outdoor unit 15 D DC fan lo...

Page 179: ...tor 86 131 146 heating peak cut control 37 high pressure control 83 high pressure control in cooling 97 HL3 14 HN3 14 HOME LEAVE operation 26 63 horizontal blade 127 hot start function 28 I indoor heat exchanger thermistor 29 30 indoor unit PCB abnormality 82 input current control 36 input over current detection 93 installation condition check 116 instruction 49 insufficient gas 110 insufficient g...

Page 180: ... S7 12 S70 14 139 157 S80 14 145 157 S90 14 157 safety precautions 49 self diagnosis digital display 28 sensor malfunction detection 43 service check function 78 shelter 138 side panel cover 124 signal receiver PCB 13 signal receiver unit 128 signal receiving sign 28 signal transmission error 87 sound blanket 149 specifications 6 starting operation control 41 stop valve cover 138 SW1 12 SW2 12 swi...

Page 181: ...SiBE05 513A iv Index ...

Page 182: ...ck 119 heating peak cut control 37 high pressure control in cooling 97 HOME LEAVE operation 26 I indoor unit PCB abnormality 82 input current control 36 input over current detection 93 installation condition check 116 insufficient gas 110 insufficient gas control 43 inverter features 19 inverter POWERFUL operation 27 inverter units refrigerant system check 117 J jumper settings 161 M mode hierarch...

Page 183: ...ndoor unit 86 thermistor or related abnormality outdoor unit 102 thermistor resistance check 115 thermostat control 24 trial operation from remote controller 160 turning speed pulse input on the outdoor unit PCB check 118 U unspecified voltage between indoor and outdoor units 88 W wiring diagrams FLKS25 35BAVMB 167 FLKS25 35BVMB 167 FLXS25 35BAVMB 167 FLXS25 35BVMB 167 RK X S25 35D2VMB 167 RK X S2...

Page 184: ... product corrosion Ask a qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage electrical shock fire or explosion Use only those parts and accessories supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorized parts ...

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Daikin Inverter FLKS25BVMB, Service Manual

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