Daikin J Series, Service Manual

Page 1: ...SiBE041025 Applied Models Inverter Pair Heat Pump Inverter Pair Wall Mounted Type J Series ...

Page 2: ...SiBE041025 i Table of Contents Inverter Pair Wall Mounted Type J Series zHeat Pump Indoor Unit FTXN25JEV1B FTXN35JEV1B Outdoor Unit RXN25JEV1B RXN35JEV1B ...

Page 3: ...rmostat Control 17 1 7 NIGHT SET Mode 18 1 8 ECONO Operation 19 1 9 Inverter POWERFUL Operation 20 1 10 Other Functions 21 2 Control Specification 22 2 1 Function of Thermistor 22 2 2 Mode Hierarchy 23 2 3 Frequency Control 24 2 4 Controls at Mode Changing Start up 26 2 5 Discharge Pipe Temperature Control 27 2 6 Input Current Control 28 2 7 Freeze up Protection Control 29 2 8 Heating Peak cut Con...

Page 4: ...rload 62 4 10 Compressor Lock 63 4 11 Input Overcurrent Detection 64 4 12 Four Way Valve Abnormality 65 4 13 Discharge Pipe Temperature Control 67 4 14 High Pressure Control in Cooling 68 4 15 Compressor System Sensor Abnormality 70 4 16 Position Sensor Abnormality 71 4 17 DC Voltage Current Sensor Abnormality 73 4 18 Thermistor or Related Abnormality Outdoor Unit 74 4 19 Electrical Box Temperatur...

Page 5: ...Blanket 134 2 5 Removal of Four Way Valve 136 2 6 Removal of Compressor 139 Part 8 Others 140 1 Others 141 1 1 Trial Operation 141 1 2 Field Settings 142 1 3 Application of Silicon Grease to a Power Transistor and a Diode Bridge 143 Part 9 Appendix 144 1 Piping Diagrams 145 1 1 Indoor Unit 145 1 2 Outdoor Unit 145 2 Wiring Diagrams 146 2 1 Indoor Unit 146 2 2 Outdoor Unit 147 ...

Page 6: ...wer cable plug from the plug socket before disassembling the equipment for repair Working on the equipment that is connected to the power supply may 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 is discharged during the repair work ...

Page 7: ...lectrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure to provide the grounding when repairing the equipment in a humid or wet place to avoid electrical shocks Be sure to turn off the power switch and unplug the power cable when cleaning the equipment The internal fan rotates at a high speed and cause injury Be sure to ...

Page 8: ... cover does not lift off or dismount because of the cable If the cover is not mounted properly the terminal connection section may cause an electrical shock excessive heat generation or fire Do not damage or modify the power cable Damaged or modified power cable may cause an electrical shock or fire Placing heavy items on the power cable and heating or pulling the power cable may damage the cable ...

Page 9: ... not install the equipment in a place where there is a possibility of combustible gas leaks If the combustible gas leaks and remains around the unit it may cause a fire Check to see if the parts and wires are mounted and connected properly and if the connections at the soldered or crimped terminals are secure Improper installation and connections may cause excessive heat generation fire or an elec...

Page 10: ...furniture and floor For unitary type only Caution Icon Type of Information Description Note Note A note provides information that is not indispensable 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 equipment loose data get an unexpected result or has to restart p...

Page 11: ...SiBE041025 List of Functions 1 Part 1 List of Functions 1 Functions 2 ...

Page 12: ...er Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check COMFORT AIRFLOW Operation Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Quiet Operation NIGHT QUIET Mode Automatic Flexible Voltage Correspondence Outdoor Unit Quiet Operatio...

Page 13: ...SiBE041025 Specifications 3 Part 2 Specifications 1 Specifications 4 ...

Page 14: ...t Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 19 0 18 0 17 0 19 0 18 0 17 Power Consumption Rated W 40 40 Power Factor Rated 95 7 96 6 98 0 95 7 96 6 98 0 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 283 770 198 283 770 198 Packaged Dimensions H W ...

Page 15: ...SiBE041025 Printed Circuit Board Connector Wiring Diagram 5 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 6 1 1 Indoor Unit 6 1 2 Outdoor Unit 8 ...

Page 16: ...ger thermistor 4 S200 Connector for fan motor 5 S403 Connector for adaptor PCB option 6 H1 H2 H3 FG Connector for terminal board 7 V1 Varistor 8 JA Address setting jumper JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 142 for detail 9 LED A LED for service monitor green 10 FU1 F1U Fuse 3 15 A 250 V 1 S27 Connector for con...

Page 17: ... Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 7 PCB Detail PCB 1 Control PCB PCB 2 Display PCB FU1 H1 H3 V1 H2 FG S200 LED A S32 S26 S6 JA JC JB S403 2P206569 4 S27 SW1 Solder side LED2 LED1 RTH1 3P206563 1 ...

Page 18: ...r reactor 6 FU1 Fuse 3 15 A 250 V 7 FU3 Fuse 20 A 250 V 8 V2 V3 Varistor 1 S10 Connector for filter PCB 2 S40 Connector for overload protector 3 S70 Connector for fan motor 4 S80 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 HL3 HN3 Connector for filter PCB 7 HR2 Connector for reactor 8 U V W Connector for compressor 9...

Page 19: ... Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 9 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB HR1 S11 HL2 HN2 E1 E2 V2 AC2 AC1 S FU3 3P257381 1 V3 FU1 S70 S10 J5 S90 LED A S40 HL3 S80 HN3 HR2 WV U V1 2P259229 1 ...

Page 20: ...eration 19 1 9 Inverter POWERFUL Operation 20 1 10 Other Functions 21 2 Control Specification 22 2 1 Function of Thermistor 22 2 2 Mode Hierarchy 23 2 3 Frequency Control 24 2 4 Controls at Mode Changing Start up 26 2 5 Discharge Pipe Temperature Control 27 2 6 Input Current Control 28 2 7 Freeze up Protection Control 29 2 8 Heating Peak cut Control 29 2 9 Outdoor Fan Control 30 2 10 Liquid Compre...

Page 21: ...ng 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 increases resulting in an increased refrigerant...

Page 22: ...itioning A fine adjustment is integrated to keep the room temperature constant 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 functions regulate the minimum and maximum frequency Forced Cooling Operation Refer to Forced operation mode on page 33 for detail Frequen...

Page 23: ...eating Mode During heating mode the large flap directs airflow downwards to spread the warm air to the entire room Wide Angle Louvers The louvers made of elastic synthetic resin provide a wide range of airflow that guarantees a comfortable air distribution Auto Swing The following table explains the auto swing process for cooling dry fan and heating COMFORT AIRFLOW Operation The vertical swing fla...

Page 24: ...peed control for cooling Heating On heating mode the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room temperature and the target temperature Note 1 During POWERFUL operation the fan rotates at H tap 80 rpm 2 The fan stops during defrost operation 3 In time of thermostat OFF the fan rotates at the following speed Cooling The fan keeps rot...

Page 25: ...oom temperature at start up and the target temperature 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 start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24ºC or more Room temperature at start up X 2 5ºC X 0 5ºC or Y 0 5ºC zone B co...

Page 26: ...controller Tc determines the target temperature Tt Tc 18 30 C 2 The target temperature Tt is calculated as Tt Tc C where C is the correction value C 0 C 3 Thermostat ON OFF point and mode switching point are as follows Tr means the room temperature Heating Cooling switching point Tr Tt 2 5 C Cooling Heating switching point Tr Tt 2 5 C Thermostat ON OFF point is the same as the ON OFF point of cool...

Page 27: ...returns to 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 Room temperature target temperature 1 5 C R11658 Cooling 0 5 C Dry 0 5 C Cooling 2 0 C Dr...

Page 28: ...then automatically raises the target temperature slightly in the case of cooling or lowers it slightly in the case of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Heating R10870 TIMER operation NIGHT SET mode ON Target temperature 0 5 C temperature shift Operation stops at the set ...

Page 29: ...ECONO button When this function is activated the maximum capacity decreases The remote controller can send the ECONO command when the unit is in COOL HEAT DRY or AUTO operation This function can only be set when the unit is running Pressing the ON OFF button on the remote controller cancels the function This function and POWERFUL operation cannot be used at the same time The latest command has the...

Page 30: ...minutes Ex POWERFUL operation in cooling mode Operation mode Fan speed Target temperature COOL H tap 80 rpm 18 C DRY DRY rotating speed 80 rpm Lowered by 2 5 C HEAT H tap 80 rpm 31 C FAN H tap 80 rpm AUTO Same as cooling heating in POWERFUL operation The target temperature is kept unchanged R11981 Target temp Fan 80 rpm 18 C POWERFUL ON POWERFUL OFF H tap Set tap It should be the lower limit of co...

Page 31: ...ers to the following table Forced operation mode Forced operation mode can be started by pressing the ON OFF button for 5 to 9 seconds while the unit is not operating Refer to Forced operation mode on page 33 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced operation is stopped 1 10 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the A...

Page 32: ...harge pipe temperature used in place of the inner temperature of the compressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge pipe thermistor C Indoor Heat Exchanger Thermistor 1 In cooling operation the indoor heat exchanger thermistor is used for freeze up protection control If th...

Page 33: ...are following modes stop cooling includes drying heating include defrosting Note Unless specified otherwise an indoor dry operation command is 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 Preheating operation During...

Page 34: ...t frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipe temperature heating peak cut freeze up protection defrost 3 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency lower limits of the following functions Four way valve operation compensation draft prevention pressure differen...

Page 35: ...t change for more than a certain fixed time the frequency is adjusted according to the D value When the D value is small the frequency is lowered When the D value is large the frequency is increased 3 Frequency management when other controls are functioning When frequency is drooping Frequency management is carried out only when the frequency droops For limiting lower limit Frequency management is...

Page 36: ...switch of the four way valve is carried out after the operation stopped Detail OFF delay switch of four way valve The four way valve coil is energized for 160 seconds after the operation is stopped 2 4 3 Four Way Valve Operation Compensation Outline At the beginning of the operation as the four way valve is switched the differential pressure to activate the four way valve is acquired by having out...

Page 37: ...ischarge pipe temperature rises above a certain level the upper limit of frequency is set to keep this temperature from going up further Detail FCG 1 FCG 2 FCG 3 TCG 1 TCG 2 TCG 3 48 72 90 180 180 10 Hz seconds FCG3 Hz Frequency Sec Time FCG2 FCG1 TCG1 TCG2 TCG3 R10540 Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Drooping zone The timer starts and the freq...

Page 38: ...e the compressor is stopped Drooping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is pulled down by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is canceled Limitation of current drooping and stop value according to the outdoor temperature...

Page 39: ...at exchanger temperature determines the frequency upper limit to prevent abnormal high pressure Detail R11982 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Drooping zone Stop zone 0 C 7 C 9 C 11 C 13 C Reference Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Drooping zone The timer starts and the frequency is drooping Keep zone Th...

Page 40: ...while forced operation The outdoor fan is controlled as well as normal operation while the forced operation 6 Fan ON OFF control for pressure difference upkeep The outdoor fan is controlled for keeping the pressure difference while cooling with low outdoor temperature When the pressure difference is small the outdoor fan stops When the pressure difference is large the outdoor fan rotates 2 10 Liqu...

Page 41: ... determined with the outdoor temperature and the outdoor heat exchanger temperature The system is in heating operation The compressor operates for 6 minutes More than 28 minutes of accumulated time pass since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with outdoor heat exchanger temperature 4 C 22 C Frequency Compressor Four w...

Page 42: ... compressor head temperature exceeds 120 C depending on the model the system shuts down the compressor If the inverter current exceeds 14 A the system shuts down the compressor 2 12 3 Refrigerant Shortage Control 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 refrigerant shortage The po...

Page 43: ...door unit is not operating The forced operation is allowed when the above both conditions are met Start Press the forced operation ON OFF button SW1 on the indoor unit for 5 seconds Command frequency 58 Hz End 1 Press the forced operation ON OFF button SW1 on the indoor unit again 2 Press the ON OFF button on the remote controller 3 The operation ends automatically after 15 minutes Others The prot...

Page 44: ...uration 35 2 Operation Manual 36 2 1 Remote Controller 36 2 2 AUTO DRY COOL HEAT FAN Operation 37 2 3 Adjusting the Airflow Direction 39 2 4 COMFORT AIRFLOW Operation 41 2 5 POWERFUL Operation 42 2 6 ECONO Operation 43 2 7 OFF TIMER Operation 44 2 8 ON TIMER Operation 45 ...

Page 45: ...er 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 over...

Page 46: ...ton It selects the airflow rate setting 9 SWING button Adjusting the airflow direction page 11 10 COMFORT AIRFLOW button COMFORT AIRFLOW operation page 13 11 ON TIMER button page 17 12 OFF TIMER button page 16 13 TIMER setting button It changes the time setting 14 TIMER CANCEL button It cancels the timer setting 15 CLOCK button 16 RESET button Restart the remote controller if it freezes Use a thin...

Page 47: ... OPERATION lamp goes off To change the temperature setting 4 Press AUTO HEAT DRY FAN COOL AUTO or COOL or HEAT operation DRY or FAN operation The temperature setting is not variable Set to the temperature you like The air conditioner operates with the operation mode of your choice From the next time on the air conditioner will operate with the same operation mode Each pressing of the button advanc...

Page 48: ...stem heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT 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 A pinging s...

Page 49: ...n to increase your comfort To start auto swing Press is displayed on the LCD The flap horizontal blade will begin to swing To set the flap at desired position This function is effective while flap is in auto swing mode The flap will stop moving disappears from the LCD Upper and lower airflow direction Press when the flap has reached the desired position ...

Page 50: ...nstalled in the corner of a room the direction of the louvers should be facing away from the wall If they face the wall the wall will block off the wind causing the cooling or heating efficiency to drop Always use a remote controller to adjust the angles of the flap If you attempt to move it forcibly with hand when it is swinging the mechanism may be broken Be careful when adjusting the louvers In...

Page 51: ...le wind that will not come in direct contact with people To start COMFORT AIRFLOW operation The flap position will change preventing air from blowing directly on the occupants of the room To cancel COMFORT AIRFLOW operation The flap will return to the memory position from before COMFORT AIRFLOW operation The flap position will change preventing air from blowing directly on the occupants of the roo...

Page 52: ...tes again with the previous settings which were used before POWERFUL operation When using POWERFUL operation there are some functions which are not available POWERFUL operation cannot be used together with ECONO or COMFORT AIRFLOW operation Priority is given to the function of whichever button is pressed last POWERFUL operation can only be set when the unit is running POWERFUL operation will not i...

Page 53: ...rrent and power consumption Normal operation Maximum during normal operation Maximum during ECONO operation ECONO operation From start up until set temperature is reached The maximum running current and power consumption of the air conditioner in ECONO operation vary with the connecting outdoor unit ECONO operation can only be set when the unit is running ECONO operation is a function which enable...

Page 54: ... at night or in the morning You can also use OFF TIMER and ON TIMER in combination 2 Press until the time setting reaches the point 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 are displayed on the LCD Once you set ON OFF TIMER the time setting is kept in the memory The memory i...

Page 55: ...bining the two timers is shown below NOTE is displayed on the LCD blinks In the following cases set the timer again After a breaker has turned off After a power failure After replacing batteries in the remote controller Example Present time 23 00 The unit operating OFF TIMER at 0 00 ON TIMER at 14 00 Combined Display Check that the clock is correct If not set the clock to the present time 2 Press ...

Page 56: ...ed Voltage between Indoor and Outdoor Unit 60 4 8 Outdoor Unit PCB Abnormality 61 4 9 OL Activation Compressor Overload 62 4 10 Compressor Lock 63 4 11 Input Overcurrent Detection 64 4 12 Four Way Valve Abnormality 65 4 13 Discharge Pipe Temperature Control 67 4 14 High Pressure Control in Cooling 68 4 15 Compressor System Sensor Abnormality 70 4 16 Position Sensor Abnormality 71 4 17 DC Voltage C...

Page 57: ...vice of the indoor or outdoor unit is activated or when the thermistor malfunctions 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 Outdoor unit The outdoor unit has one green LED LED A on the PCB The blinking green LED indicates normal condition of microcomputer operation R11599 Operati...

Page 58: ...o 10 cycles stops air conditioner operation Operation lamp OFF Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 24 C or higher and cooling operation cannot be used when the outdoor temperature is below 10 C Diagnose with remote controller indication 52 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connec...

Page 59: ...own 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 12 F6 23 A1 2 U4 13 C7 24 E1 3 L5 14 A3 25 UA 4 E6 15 H8 26 UH 5 H6 16 H9 27 P4 6 H0 17 C9 28 L3 7 ...

Page 60: ...nd change the figure until you hear the sound of beep 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 See 7 4 Press the MODE button The figure of the one s place blinks R4272 R4273 R4274...

Page 61: ...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 52 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 141 for trial operation 9 Press the ON OFF button twice to return to the normal ...

Page 62: ...ated abnormality 58 C9 Room temperature thermistor or related abnormality 58 Outdoor Unit E1 Outdoor unit PCB abnormality 61 E5 OL activation compressor overload 62 E6 Compressor lock 63 E8 Input overcurrent detection 64 EA Four way valve abnormality 65 F3 Discharge pipe temperature control 67 F6 High pressure control in cooling 68 H0 Compressor system sensor abnormality 70 H6 Position sensor abno...

Page 63: ...ion 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 R11704 Caution To secure the connection once disconnect the connector and then reconnect it Match the compatible models Replace the indoor unit PCB 1 Replace the indoor un...

Page 64: ...ation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Malfunction Decision Conditions Freeze up protection control During cooling operation the indoor heat exchanger temperature is below 0 C Heating peak cut control During heating operation the indoor heat exchanger temperature is above 65 C Supposed Caus...

Page 65: ...ted Replace the capillary tube NG Replace the thermistor Check No 06 Check the indoor heat exchanger thermistor Check the air filter Check the dust accumulation on the indoor heat exchanger Replace the indoor outdoor unit PCB Is there any short circuit Is it very dirty Is it very dirty Error again Check the air passage Be sure to turn off the power switch before connecting or disconnecting connect...

Page 66: ... 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 Disconnection of connector Foreign matters stuck in the fan Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defect...

Page 67: ...ce OK Turn the power on again Check No 18 Check output of the indoor unit PCB Is the motor control voltage 15 VDC generated Check No 19 Check the indoor unit PCB for pulse input Is the rotation pulse generated NO YES YES YES NO NO To secure the connection once disconnect the connector and then reconnect it Correct the connection Remove them Replace the indoor fan motor Replace the indoor unit PCB ...

Page 68: ...ompressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 06 Refer to P 86 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 Che...

Page 69: ...upply waveform Check the voltage of the connection wires on the indoor terminal board between No 1 and No 3 and between No 2 and No 3 YES YES Replace the indoor unit PCB Locate the cause of the disturbance of the power supply waveform and correct it NO R12023 NO YES YES NO NO Caution Correct the indoor unit outdoor unit connection wires Diagnose the outdoor unit PCB Set the fan operation by remote...

Page 70: ...ing of connection wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB OK Matched compa...

Page 71: ...ween PCBs Noise Momentary fall of voltage Momentary power failure etc Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES YES R12024 YES NO NO Replace the outdoor unit PCB 2 Ground the system Zero cross signal abnormality Replace the outdoor unit PCB 1 Replace the harness Check to see if the outdoor unit is groun...

Page 72: ...rant shortage Water mixed in refrigerant Defective stop valve Troubleshooting Check No 05 Refer to P 85 Check No 06 Refer to P 86 Check No 11 Refer to P 89 R11985 Caution YES NG Discharge pipe thermistor NO OK OK NG Refrigerant shortage Water mixed Stop valve NG OK Insert the thermistor in position Replace the discharge pipe thermistor Refer to the refrigerant line check procedure Replace the outd...

Page 73: ...he power Disconnect the harnesses U V and W Replace the indoor outdoor unit PCB R11986 Caution NO NO YES YES NO YES YES Check with the inverter checker Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply or replace the PM1 Replace ...

Page 74: ...ng or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the wires have been disconnected and reconnected for part replacement for example and the system is interrupted by an input overcurrent take the following procedure R11709 NO YES YES NO Start operation and measure the input current Check No 08 Check the discharge pressure Check No 0...

Page 75: ... function within their normal ranges in each operation mode Malfunction Decision Conditions A following condition continues over 10 minutes after operating for 5 minutes Cooling Dry room temp indoor heat exchanger temp 5 C Heating indoor heat exchanger temp room temp 5 C Supposed Causes Disconnection of four way valve coil Defective four way valve coil or harness Defective four way valve Defective...

Page 76: ... check procedure Replace the four way valve defective or dust clogged Reconnect in position Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R11710 Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 06 Check the thermistors Check No 11 Check the refrigerant line Check No 05 Check the...

Page 77: ...ermistor or outdoor temperature thermistor Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 06 Refer to P 86 Check No 11 Refer to P 89 Stop temperatures C C 1 above 50 Hz rising above 45 Hz dropping 100 83 2 39 50 Hz rising 34 45 Hz dropping 100 83 3 below 39 Hz rising below 34 Hz dropping 95 78 R11987...

Page 78: ...e outdoor heat exchanger thermistor exceeds the limit Malfunction Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 60 C The error is cleared when the temperature drops below about 50 C Supposed Causes The installation space is not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Defective outdoor heat ex...

Page 79: ... thermistor Replace the capillary tube Completed Clean the outdoor heat exchanger Change the installation location or direction Check the installation space Replace the outdoor unit PCB NG NO OK NG OK OK OK NG YES NG Check No 09 Check the outdoor fan Check No 08 Check the discharge pressure Check No 06 Check the outdoor heat exchanger thermistor Error again Check No 07 Check the installation condi...

Page 80: ...nverted to voltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnection of harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO R11712 YES Turn off the power and turn it on again YES NO Replace the harness No problem Keep on running Re...

Page 81: ...circuit Malfunction Decision Conditions The compressor fails to start in about 15 seconds after the compressor run command signal is sent If the error repeats 16 times the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused ...

Page 82: ...NO YES YES NO YES YES Check No 29 Check the short circuit of the diode bridge Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB...

Page 83: ...nput current Malfunction Decision Conditions The compressor running frequency is above 52 Hz The input current is also below 0 1 A If the error repeats 4 times the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor unit PCB Troubleshooting Replace the outdoor unit PCB Caution Be sure to turn off the power switch before ...

Page 84: ...V with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defective thermistor Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating operation Defective outdoor unit ...

Page 85: ...ollowing thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB Error displayed again on remote controller Indoor heat exchanger thermistor functioning Check No 06 C...

Page 86: ...function Decision Conditions With the compressor off the radiation fin temperature is above C The error is cleared when the radiation fin temperature drops below C To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C and stops when it drops below C Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disco...

Page 87: ...K NO YES Turn off the power and turn it on again Check the radiation fin temperature Check No 07 Check the installation condition Radiation fin dirty About C Check No 09 Check the outdoor fan or related Error again or outdoor fan activated Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the fan motor Correct the connectors and fan motor lead wire Clean up the radiation fin Be sur...

Page 88: ...tion fin temperature with the compressor on is above C The error is cleared when the radiation fin temperature drops below C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicon...

Page 89: ...ES Above C Radiation fin dirty Check No 09 Check the outdoor unit fan or related Error displayed again Has PCB been replaced Check if the silicon grease applied properly on the radiation fin If not apply it See Note Check the power transistor and the radiation fin for looseness If they are found to be fit tightly replace the outdoor unit PCB or the power transistor Replace the outdoor unit PCB Rep...

Page 90: ...urs while the compressor is running A speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats 8 times the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective power m...

Page 91: ...No 07 Check the installation condition Check with the inverter checker Turn off the power and disconnect the harnesses U V and W Turn off the power and reconnect the harnesses Turn on the power again and start operation Turn off the power and turn it on again to start the system See if the same error occurs Check the supply voltage Keep on using as it is Check the connectors and other components F...

Page 92: ...on Conditions Refrigerant shortage detection I The following conditions continue for 7 minutes Input current input voltage output frequency Output frequency If the error repeats 4 times the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of the discharge pipe thermistor indoor or outdoor heat exchanger thermistor room or...

Page 93: ...tion Open the stop valve Repair the pipe flare or replace the union Check the power transistor harness for looseness Correct it as required Also replace cracked pipe Check the pipes for improper contact Correct them as required Also replace cracked pipe Replace the defective one s Completed Replace the compressor Completed Error again Oil oozing at internal piping Stop valve closed Compressor vibr...

Page 94: ...rror occurs and restarts automatically after 3 minute standby Supposed Causes Supply voltage is not as specified Defective DC voltage detection circuit Defective over voltage detection circuit Defective PAM control part Layer short inside the fan motor winding Troubleshooting Correct the power supply Replace the PM1 Replace the outdoor unit PCB Check for such factors for a long term Try to restart...

Page 95: ...r way valve coil from the connector and check the continuity Start heating operation Four way valve coil Cooling Dry No continuity Heating Continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 Ω S80 voltage at 220 240 VAC with compressor on Fig 1 R11904 Fig 1 Voltage at S80 220 240 VAC ON Compressor Time ...

Page 96: ...stor is directly mounted on the PCB disconnect the connector for the PCB and measure Thermistor Room temperature thermistor Other thermistors R25 C 10 kΩ R25 C 20 kΩ Temperature C B 3435 B 3950 20 73 4 kΩ 211 0 kΩ 15 57 0 150 0 10 44 7 116 5 5 35 3 88 0 0 28 2 67 2 5 22 6 51 9 10 18 3 40 0 15 14 8 31 8 20 12 1 25 0 25 10 0 20 0 30 8 2 16 0 35 6 9 13 0 40 5 8 10 6 45 4 9 8 7 50 4 1 7 2 11952 Other ...

Page 97: ...oor heat exchanger very dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be 46 C or lower R11718 Not dirty YES YES Dirty NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pi...

Page 98: ...r Replace the fan motor Replace the outdoor unit PCB The outdoor fan system is normal Does the outdoor fan rotate OK Check the fan motor lead wire connector for secure connection YES YES NO Does the outdoor fan start just after the power is turned on NO Are the resistance at connector leads 1 red black 2 white black Continuity No continuity Check the fan capacitor for continuity ...

Page 99: ...ply waveform is a sine wave Fig 1 Check to see if there is waveform disturbance near the zero cross sections circled in Fig 2 5 1 7 Inverter Units Refrigerant System Check Check No 11 Fig 1 Fig 2 R1736 R1444 Refrigerant system check Check for refrigerant leaks See the service diagnosis on refrigerant shortage U0 R8259 YES NO Place the thermistor Replace the refrigerant Is the discharge thermistor ...

Page 100: ...sor connector with a multi tester Evaluate the measurement results for a judgment 5 1 9 Indoor Unit PCB Output Check Check No 18 1 Check the connector for connection 2 Check the motor control voltage is generated between the pins 2 and 3 Negative terminal of tester positive terminal for digital tester DB1 UVW DB1 UVW Positive terminal of tester negative terminal for digital tester UVW DB1 UVW DB1 ...

Page 101: ... Turn the power on and stop the operation 3 Check if the Hall IC generates the rotation pulse 4 times when the fan motor is manually rotated once between the pins 1 and 3 R11979 12 11 10 9 8 7 6 5 4 3 2 1 Phase U Free pin S200 Free pin Free pin Free pin Free pin Free pin Phase V Phase W GND Motor control voltage 15 VDC Rotation pulse 5 VDC ...

Page 102: ...r for connection 2 Turn the power off 3 Check if each resistance at the phases U V and V W is 90 Ω 100 Ω between the pins 12 9 and between 9 6 R11979 12 11 10 9 8 7 6 5 4 3 2 1 Phase U Free pin S200 Free pin Free pin Free pin Free pin Free pin Phase V Phase W GND Motor control voltage 15 VDC Rotation pulse 5 VDC ...

Page 103: ...ing Measure the resistance between the pins of the DB1 as below If the resistance is or less than 1 kΩ short circuit occurs on the main circuit terminal of the tester in case of digital terminal 2 3 4 2 3 1 terminal of the tester in case of digital terminal 4 2 3 1 2 3 Resistance in OK several kΩ several MΩ several kΩ several MΩ Resistance in NG 0 Ω or 0 0 0 Ω or R12039 Tester 1 2 3 4 ...

Page 104: ...oval of Electrical Box Vertical Blades 102 1 6 Removal of Swing Motor PCB 107 1 7 Removal of Indoor Heat Exchanger 111 1 8 Removal of Fan Rotor Fan Motor 114 1 9 Exchange of Drain Hose 117 2 Outdoor Unit 118 2 1 Removal of Panels 118 2 2 Removal of Outdoor Fan Fan Motor 120 2 3 Removal of Electrical Box PCB 122 2 4 Removal of Sound Blanket 134 2 5 Removal of Four Way Valve 136 2 6 Removal of Compr...

Page 105: ...al reception When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filter 1 Open the front panel to the position where it stops 2 Slightly push up the knob at the center of the air filter The air filter is not marked for difference between the right and left sides The air filter can be set easily by inserting it along t...

Page 106: ...ir filter and unfastening the projections from the air filter frame 3 Remove the Titanium apatite photocatalytic air purifying filter from its frame at 5 positions by bending it To prevent the damage do not remove the Titanium apatite photocatalytic air purifying filter from the frame when cleaning it The Titanium apatite photocatalytic air purifying filter is not marked for difference between the...

Page 107: ...r shaft while bending the horizontal blade slightly The center shaft can be released easily by bending the blade Cautions for reassembling 1 Since the key pattern hook is provided rotate the blade and fit it to the right shaft first 2 Fit the blade to the center and left shafts 3 Unfasten the left shaft of the horizontal blade 4 Release the right shaft of the horizontal blade R11622 Horizontal bla...

Page 108: ...Indoor Unit SiBE041025 98 Removal Procedure 5 Remove the horizontal blade Step Procedure Points R11626 ...

Page 109: ...over the position where it stops 2 Release the right rotary shaft The rotary shaft on each side can be released easily by sliding each shaft inwards 3 Release the left rotary shaft 4 Remove the front panel When reassembling the front panel fit the right and left rotary shafts one by one into the grooves and fully push them in position Left side Front panel Right side R11627 Right Rotary shaft R116...

Page 110: ...ep Procedure Points 1 Remove the 2 screws which fix the front grille to the main body 2 The front grille has 3 hooks on the upper part Refer to the removal procedure in a reverse way when reassembling 3 Press each hook and also lift the grille up to unfasten the hooks 4 Pull the upper part of the front grille R11631 Front grille R11632 Hooks Left Center Right R8030 R11633 Left Center Right ...

Page 111: ...SiBE041025 Indoor Unit Removal Procedure 101 5 Lift the lower part up and remove the front grille When reassembling the front grille make sure that the hooks are fastened Step Procedure Points R12040 ...

Page 112: ...s 1 Disconnect the connecting wires Preparation Remove the front grille according to the Removal of Front Grille 1 Remove the screw of the service cover 2 Pull out the service cover down in the direction of the arrow 3 The figure shows the connections of wire harnesses 4 Remove the screw of the wire retaining plate R12041 R12042 Terminal board Electrical box Wire retaining plate Indoor heat exchan...

Page 113: ... power supply red 3 transmission yellow green earth 6 Pull out the indoor heat exchanger thermistor Take care not to lose the clip of thermistor 2 Remove the electrical box 1 Remove the screw and disconnect the earth wire Step Procedure Points Terminal board R11639 Connecting wires R12045 Indoor heat exchanger thermistor Clip R11268 Thermistor Screw R12046 Earth wire ...

Page 114: ...rew of the electrical box 4 Slide the electrical box to the right first and detach the horizontal blade from the electrical box 5 Pull the electrical box There is a hook on the bottom frame When reassembling fit the rear side of the electrical box to the hook Step Procedure Points R12047 S200 R12048 R12049 R11657 Hook Bottom frame ...

Page 115: ...s at the button Remove the fan guard Repeat the same procedure to remove the fan guard on the other side 3 Unfasten the hooks at the upper 2 positions A vertical blade ASSY has 6 fins It is impossible to replace only one fin The vertical blade ASSY is not marked for difference between right and left Step Procedure Points Hook Fan guard Hook R11645 R11646 Hook R11647 Hook Hook R8020 Vertical blade ...

Page 116: ...re 4 Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver 5 Remove the vertical blade ASSY Repeat the same procedure to remove the vertical blade ASSY on the other side Step Procedure Points R8022 Hook R8023 ...

Page 117: ...rk Step Procedure Points 1 Remove the shield plate Preparation Remove the electrical box according to the Removal of Electrical Box 1 Unfasten the hooks at the upper 2 positions of the shield plate 2 Unfasten the hook at the lower position and remove the shield plate 1 2 Remove the swing motor 1 Remove the screw of the swing motor R11648 Hook Shield plate 1 Hook R12059 Swing motor R11650 ...

Page 118: ... swing motor has a hook Press the hook with a flat screwdriver to unfasten it 3 Remove the display PCB 1 Unfasten the hook and release the display PCB ASSY 2 Turn over the display PCB ASSY and unfasten the 3 hooks to remove the display PCB Step Procedure Points R11651 R11652 Display PCB ASSY R11653 Hook Display PCB ...

Page 119: ...the display PCB S27 control PCB 4 Remove the control PCB 1 Lift the shield plate 2 and unfasten the 2 hooks 2 Slide the shield plate 2 and remove it 3 Release the harnesses from the hooks Step Procedure Points R8010 S27 ON OFF button Forced operation ON OFF button TIMER lamp Signal receiver Operation lamp R12061 Hook Shield plate 2 R12062 ...

Page 120: ...ift up the upper part of the control PCB and remove it 6 The figure shows the component parts of the control PCB S6 swing motor S26 display PCB S32 indoor heat exchanger thermistor S200 fan motor S403 adaptor PCB option Step Procedure Points R12060 11943 Control PCB Hook Hook S32 S200 S24 S26 R8013 S26 S6 S403 S32 S200 Fuse 250 V 3 15 A ...

Page 121: ...ning and the stop valve opened air may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury If the drain hose is embedded in the wall disconnect the drain hose beforehand 1 Remove the screws which fix the indoor heat exchanger to the installation plate 2 Lift the indoor unit with a wooden base 3 Place a plastic sheet under the drain h...

Page 122: ...oor heat exchanger When the pipings are disconnected protect the both openings from entering moisture 1 Remove the indoor unit from the installation plate 2 Unfasten the hook of the piping fixture on the back of the unit Step Procedure Points R8018 Gas piping Liquid piping R8019 Auxiliary piping Piping fixture R8038 R8039 ...

Page 123: ...door heat exchanger be sure to wear gloves or wrap it with cloth before proceeding to the work You may be injured by the fins 5 Push and unfasten the hook on the right side and lift up the indoor heat exchanger 6 Pull the indoor heat exchanger to the front side to unfasten the hooks completely and then lift it Step Procedure Points Auxiliary piping R8041 R11269 Hook Hook Screw Hook R8042 R8043 Ind...

Page 124: ...ing off all power supplies before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the indoor heat exchanger according to the Removal of Indoor Heat Exchanger 1 Remove the screw of the right side panel 2 Unfasten the hook of the right side panel 3 Remove the right side panel Right side panel R8044 Hook ...

Page 125: ...ove the fan rotor and the fan motor 1 The fan motor has 3 projections The fan rotor has a rotating shaft on the left side 2 Lift up the right side of the fan rotor and slide it to the right then remove it Step Procedure Points Fan rotor Fan motor R8048 ...

Page 126: ... 5 Pull out the fan motor from the fan rotor to remove The magnet of the fan motor is united with the fan rotor Be careful not to attract metal waste to the magnet Keep away from the materials that can be affected by magnetic force also Step Procedure Points Bearing R8049 Magnet Coil Fan motor R8052 ...

Page 127: ...ater leakage make sure to mount the heat insulation fixing screw as it was 2 Remove the drain plug located at the left side with pliers and insert the removed drain plug into the right side with a hexagonal wrench 4 mm 3 Insert the drain hose to the left side and tighten it with the heat insulation fixing screw Caution Do not thrust in the drain plug with a sharp pointed tool like a screwdriver Th...

Page 128: ...work Step Procedure Points 1 Appearance features Take care not to cut your finger by the fins of the outdoor heat exchanger 2 Remove the panels The stop valve cover is united with the shield plate When reassembling make sure to fit the 3 hooks 1 Remove the screw of the stop valve cover Pull down the stop valve cover and remove it R10707 R10708 R10709 Stop valve cover R10710 Shield plate Hooks ...

Page 129: ...e 5 screws of the front panel 4 Lift up the left side and unfasten the hooks 5 Unfasten the right side hooks and remove the front panel 6 7 Remove the 4 screws of the discharge grille Unfasten the 6 hooks and remove the discharge grille Step Procedure Points R10711 Top panel Front panel INVERTER R10712 R10713 R10714 Discharge grille ...

Page 130: ...panels according to the Removal of Panels The screw has reverse winding Align mark of the outdoor fan with D cut section of the motor shaft when mounting Wrench size 10 mm 1 2 Release the washer fitted nut M6 of the outdoor fan with a wrench Remove the outdoor fan 2 Remove the fan motor 1 Disconnect the connector for the fan motor S70 2 Release the fan motor lead wire from the hooks R11755 Shaft D...

Page 131: ...the lead wire through the back of the motor when reassembling so as not to be entangled with the outdoor fan 4 Release the fan motor lead wire from the hooks 5 Remove the 3 screws to remove the fan motor Step Procedure Points R11945 Fan motor fixing frame R3249 Lead wire Outdoor fan R11757 R11758 Fan motor ...

Page 132: ...plies before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the panels according to the Removal of Panels 1 Unhook the outdoor temperature thermistor 2 Lift up the guard net to remove 3 Remove the screw on the rear side of the right side panel R11760 Outdoor temperature thermistor R11761 Guard net R11759 Right side panel ...

Page 133: ...ve the 4 screws on the right side panel 5 Unfasten the hook on the rear side When reassembling make sure to fit the hook 6 Unfasten the hook and lift up the right side panel to remove Step Procedure Points R11762 Hook R11763 R11764 Right side panel Hook ...

Page 134: ...p to the dent of fixture 1 Release the discharge pipe thermistor 2 Release the outdoor heat exchanger thermistor 3 Lift the hook with a flat screwdriver and remove the electronic components mounting plate Step Procedure Points Discharge pipe thermistor R11765 Dent Fixture R11740 R12050 Outdoor heat exchanger thermistor Electronic components mounting plate R11767 ...

Page 135: ...he clamp 5 Release the harnesses 6 Disconnect the connector for the thermistors S90 S90 outdoor temperature thermistor outdoor heat exchanger thermistor discharge pipe thermistor 7 Remove the thermistor ASSY Step Procedure Points R12051 R11769 S90 R11770 ...

Page 136: ... 3 Remove the electrical box 1 Disconnect the connector for overload protector S40 2 Disconnect the connector for four way valve coil S80 3 Disconnect the relay connector for the compressor motor Step Procedure Points S40 R11771 S80 R11772 R11774 ...

Page 137: ...from the hook 5 Unfasten the hook of the electrical box from the partition plate with a flat screwdriver The electrical box can be removed by lifting itself without a screwdriver 6 Lift and remove the electrical box Step Procedure Points R11775 R7318 Electrical box R11776 ...

Page 138: ...re 4 Remove the control PCB 1 Disconnect the 2 terminals of the reactor 2 Remove the screw of the terminal board and pull out the terminals 3 Cut the clamp Step Procedure Points Reactor Brown White Control PCB R11946 Terminal board R11779 R11780 ...

Page 139: ...or Unit Removal Procedure 129 4 Remove the 3 screws to remove the reactor 5 Disconnect the 3 connectors for filter PCB S10 HN3 HL3 6 Release the harnesses Step Procedure Points Reactor R11777 S10 HN3 HL3 R11781 R11782 ...

Page 140: ...8 Unfasten the 2 hooks 9 Lift and remove the control PCB 10 Feature of the control PCB S10 HN3 HL3 filter PCB S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors Step Procedure Points Control PCB R10717 R11783 S70 S10 S90 S40 S80 HL3 HN3 R11784 ...

Page 141: ...5 Outdoor Unit Removal Procedure 131 5 Remove the filter PCB 1 Remove the screw of the earth wire 2 Cut the clamp 3 Release the harnesses from the hook Step Procedure Points Earth R11785 Filter PCB R11786 R11787 ...

Page 142: ...Outdoor Unit SiBE041025 132 Removal Procedure 4 Remove the screw 5 Unfasten the 2 hooks Step Procedure Points R11788 R11789 ...

Page 143: ...SiBE041025 Outdoor Unit Removal Procedure 133 6 Release the harnesses 7 Remove the filter PCB Step Procedure Points R11790 R11791 Filter PCB ...

Page 144: ...re after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate 1 Remove the 2 screws 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 R12052 Hook R12053 Partition plate ...

Page 145: ...et carefully 1 Lift and remove the sound blanket top 2 Pull the sound blankets outer and inner 2 out 3 Pull the sound blanket inner 1 out Since the piping ports on the sound blanket are torn easily remove the blanket carefully Step Procedure Points Sound blanket top R12054 R12055 Sound blanket outer Sound blanket inner 2 Sound blanket inner 1 R12056 ...

Page 146: ...ll power supplies before disassembling work Step Procedure Points 1 Remove the peripheries Remove the four way valve coil and the putty so as not to burn them 1 Remove the screw and remove the four way valve coil 2 Remove the terminal cover 3 Disconnect the terminals R11799 Four way valve coil R11797 Terminal cover U V W R7414 U red V yellow W blue ...

Page 147: ...g method If nitrogen gas is not available braze the parts speedily 2 Avoid deterioration of the gaskets due to carbonization of oil inside the four way valve or thermal influence For this purpose wrap the four way valve with wet cloth Splash water over the cloth against becoming too hot keep it below 120 C In pulling the pipes be careful not to over tighten them with pliers The pipes may get defor...

Page 148: ...ter 2 With a tube cutter cut off the internal pipes to easily take out the four way valve Note Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit 3 Disconnect the points c and d Warning If refrigerant gas leaks during the work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated 3 Remove the capillary tube 1 Heat up...

Page 149: ...t is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry and avoid excessive heating Keep below 120 C Note Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit Remove the...

Page 150: ...SiBE041025 140 Others Part 8 Others 1 Others 141 1 1 Trial Operation 141 1 2 Field Settings 142 1 3 Application of Silicon Grease to a Power Transistor and a Diode Bridge 143 ...

Page 151: ... operation with the previous mode when the circuit breaker is restored In cooling mode select the lowest programmable temperature in heating mode select the highest programmable temperature Trial operation may be disabled in either mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 C to 28 C in cooling mode 20 C to 24 C in heating mode...

Page 152: ...t the address setting jumper J4 1 2 2 Jumper and Switch Settings For the location of the jumper refer to page 7 9 ADDRESS EXIST CUT 1 2 JA JA R12058 ADDRESS J4 EXIST CUT 1 2 J4 Jumper Function When connected factory set When cut JB on indoor unit PCB Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting Remote controller setting Fan speed ...

Page 153: ... transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction Remark There is the possibility of failure with smoke in case of bad heat radiation Wipe off the old silicon grease completely on a radiation fin Apply the silicon grease evenly to the whole Do not leave any foreign object such as solder or paper waste between the power transistor...

Page 154: ...SiBE041025 144 Appendix Part 9 Appendix 1 Piping Diagrams 145 1 1 Indoor Unit 145 1 2 Outdoor Unit 145 2 Wiring Diagrams 146 2 1 Indoor Unit 146 2 2 Outdoor Unit 147 ...

Page 155: ...COOLING HEATING THERMISTOR ON HEAT EXCH 4D065938A OUTDOOR UNIT HEAT EXCHANGER 7 0CuT 7 0CuT 7 0CuT 6 4CuT 7 0CuT M 6 4CuT PROPELLER FAN 9 5CuT 9 5CuT STRAINER 4 8CuT FIELD PIPING 6 4CuT 9 5CuT 6 4CuT REFRIGERANT FLOW MUFFLER MUFFLER 9 5CuT FIELD PIPING COOLING COMPRESSOR 9 5CuT HEATING ACCUMULATOR OUTDOOR TEMPERATURE THERMISTOR HEAT EXCHANGER THERMISTOR FAN MOTOR CAPILLARY TUBE LIQUID STOP VALVE G...

Page 156: ...K BLK BLK BLK BLK BLK BLK BLK YLW BLK BLK BLK BLU BLK RED WHT ORG FG F1U 1 4 1 6 S601 S602 H1 H3 M M H1P H2P t M1S M1F M1F R2T M1S PCB1 PCB3 R1T R2T NOTE S6 S602 S21 S1W X1M PCB 3 OPTION FRAME GROUND FUSE HARNESS PILOT LAMP FAN MOTOR SWING MOTOR PRINTED CIRCUIT BOARD THERMISTOR CONNECTOR OPERATION SWITCH TERMINAL STRIP PROTECTIVE EARTH SIGNAL RECEIVER WIRELESS REMOTE CONTROLLER TRANSMISSION CIRCUI...

Page 157: ...ENSER NOTE 1 REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS CAPACITOR DIODE BRIDGE INTELLIGENT POWER MODULE FUSE LIVE COIL REACTOR COMPRESSOR MOTOR FAN MOTOR MAGNETIC RELAY NEUTRAL OVERLOAD PROTECTOR PRINTED CIRCUIT BOARD CONNECTOR THERMISTOR SURGE ARRESTER VARISTOR TERMINAL STRIP ELECTRONIC EXPANSION VALVE COIL REVERSING SOLENOIDE VALVE COIL FERRITE CORE PROTECTIVE EARTH ...

Page 158: ...ries or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion Read the User s Manual 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...