Daikin Sensira Series Page 126 Service Manual Download

Page: 126 / 172

Components

Service manual

126

FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C

+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C

Split Sensira R32

ESIE18-12E – 2021.02

INFORMATION

All thermistors have a resistance tolerance of 3%.

Does the measured resistance of the
thermistor match with the
temperature determined resistance?

Action

Yes

Thermistor is OK. Return to the
troubleshooting of the specific error
and continue with the next procedure.

Replace the specific PCB, see

"2 Components"

[

37].

Summary of Contents for Sensira Series

Page 1: ...Service manual Split Sensira R32 FTXF20 71A FTXF20 25B FTXF20 42C ATXF20 71A ATXF20 42C RXF20 71A RXF20 60B RXF20 42C ARXF20 71A ARXF20 42C...

Page 2: ...piled the content of this publication to the best of its knowledge No express or implied warranty is given for the completeness accuracy reliability or fitness for particular purpose of its content an...

Page 3: ...0 71A added Indoor unit models ATXF20A and ATXF50 71A added Technical data Wiring diagram Wiring diagrams for new models added Technical data Piping diagram Piping diagrams for new models added Techni...

Page 4: ...tion sensor 20 1 5 19 H8 00 Outdoor unit Malfunction of compressor input system 21 1 5 20 H9 00 Outdoor unit Malfunction of outdoor air thermistor 21 1 5 21 J3 00 Outdoor unit Malfunction of discharge...

Page 5: ...ecking procedures 127 3 1 2 Repair procedures 128 3 2 Refrigerant circuit 129 3 2 1 Checking procedures 129 3 2 2 Repair procedures 133 3 3 External factors 136 3 3 1 Checking procedures 136 4 Mainten...

Page 6: ...roller to reset the error 1 3 To reset the error code via outdoor unit Prerequisite Problem is solved 1 Perform a power reset to reset the error code 1 4 To perform a test run Prerequisite Power suppl...

Page 7: ...s immediately after power is restored 1 5 Error based troubleshooting 1 5 1 A1 00 PCB abnormality Trigger Effect Reset The system CANNOT set the internal settings Unit will stop operating Power reset...

Page 8: ...trol To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check for objects near the indoor unit that may block the airflow See 3 3 External factors 4136 P...

Page 9: ...2 5 Indoor unit fan motor 464 Possible cause Faulty indoor unit fan motor INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 1 5 4 C4...

Page 10: ...CB 467 Possible cause Faulty indoor unit main PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 1 5 6 E1 00 Outdoor unit PCB defe...

Page 11: ...en performed and the problem is still present contact the helpdesk 1 5 7 E3 00 Outdoor unit Actuation of high pressure switch Trigger Effect Reset High pressure switch opens due to measured pressure a...

Page 12: ...runs without warning for 60 seconds To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check that all stop valves of the refrigerant circuit are open See...

Page 13: ...n the listed order 1 Perform a check of the discharge pipe thermistor See 2 13 Thermistors 4117 Possible cause Faulty discharge pipe thermistor or connector fault 2 Check that all stop valves of the r...

Page 14: ...ORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the outdoor unit fan motor See 2 9 Outdoor unit fan motor 492 Possible cause Faulty outdoor unit fan motor 2 P...

Page 15: ...fter a continuous operation for some time If the error occurs too soon unit will stop operating Manual reset via user interface To solve the error code INFORMATION It is recommended to perform the che...

Page 16: ...It is recommended to perform the checks in the listed order 1 Check that all stop valves of the refrigerant circuit are open See 3 2 Refrigerant circuit 4129 Possible cause Closed stop valve in the re...

Page 17: ...ve in the refrigerant circuit 3 Perform a check of the heat exchanger thermistor See 2 13 Thermistors 4117 Possible cause Faulty heat exchanger thermistor 4 Perform a check of the expansion valve See...

Page 18: ...non condensables and or humidity in the refrigerant circuit See 3 2 Refrigerant circuit 4129 Possible cause Non condensables and or humidity in the refrigerant circuit 4 Check if the refrigerant circu...

Page 19: ...roperly on the heat sink INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 1 5 17 H3 00 Outdoor unit Malfunction of high pressure swi...

Page 20: ...a check of the main PCB See 2 8 Main PCB 474 Possible cause Faulty main PCB 3 Check that all stop valves of the refrigerant circuit are open See 3 2 Refrigerant circuit 4129 Possible cause Closed stop...

Page 21: ...m a check of the compressor See 2 2 Compressor 444 Possible cause Faulty compressor or miswiring of the compressor power supply cable 3 Perform a check of the reactor See 2 11 Reactor 4111 Possible ca...

Page 22: ...If all procedures listed above have been performed and the problem is still present contact the helpdesk 1 5 22 J6 00 Outdoor unit Malfunction of heat exchanger thermistor Trigger Effect Reset Outdoor...

Page 23: ...outdoor heat exchanger INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 1 5 24 L4 00 Outdoor unit Malfunction of inverter radiating...

Page 24: ...To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check that all stop valves of the refrigerant circuit are open See 3 2 Refrigerant circuit 4129 Possi...

Page 25: ...he problem is still present contact the helpdesk 1 5 26 P4 00 Outdoor unit Malfunction of radiating fin temperature sensor Trigger Effect Reset Radiating fin thermistor input is out of range Unit will...

Page 26: ...pressor power supply cable 7 Perform a check of the expansion valve See 2 3 Expansion valve 453 Possible cause Faulty expansion valve 8 Check for leaks in the refrigerant circuit Look for oil traces o...

Page 27: ...ating Power reset via outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check if the power supply is conform with the regulations See 3 1 E...

Page 28: ...rigger Effect Reset Signal transmission between outdoor and indoor unit abnormality Improper combination of outdoor and indoor unit Unit will stop operating Power reset via outdoor unit To solve the e...

Page 29: ...C WB or higher Cooling operation cannot be used when the outdoor temperature is below 10 C DB When the operation lamp blinks there may be an error code activating the protection device Diagnose with r...

Page 30: ...in specified range Field piping is defective is there a refrigerant leakage Is there capacity loss over the condensor saturation pressure or sound because of air mixed in to the circuit Incorrect size...

Page 31: ...ibration prevention where needed If the mounting wall is too thin you must use cushion material or rubber or change the installation place Refrigerant piping is too short is the length within specifie...

Page 32: ...al inspection Does air enter the refrigerant system Conduct refrigerant collection and vacuum drying and then add proper amount refrigerant Is the refrigerant overcharged Conduct refrigerant collectio...

Page 33: ...here clogging before or after the expansion valve capillary Check if there is a temperature difference before and after expansion valve capillary Check if the main valve unit of expansion valve operat...

Page 34: ...0 supplied Check the insulation of the electric system Check the thermistor Connection witch PCB Output Check PCB s HAP LED s if applicable if green led on the control PCB is not blinking then the mic...

Page 35: ...ir in the system Water in the system Check the fan motor Check the magnetic switch Check the overcurrent relay Check the four way valve coil Is there a short circuit Is the four way valve coil broken...

Page 36: ...site Oil mist Check installation conditions Dirty heat exchanger Air filter Dirty air filter Fan motor Defective fan motor 1 6 11 Swing flap does not operate Symptom Check Detail Swing flap does not...

Page 37: ...The coil gets hot while energized Wait for it to cool down 2 Verify that the screw is firmly fixing the coil to the valve body 3 Check if any damage or burst is present Is the 4 way valve coil firmly...

Page 38: ...Class 20 42 12 V DC Class 50 71 220 240 V AC 7 De activate Heating and activate Cooling operation via the user interface 8 Measure the voltage on the 4 way valve connection on the PCB Result The measu...

Page 39: ...way valve see 2 1 1 Checking procedures 437 When outdoor temperature is mild and unit can switch between heating and cooling INFORMATION This procedure is ONLY possible when the outdoor temperature i...

Page 40: ...ature is outside the temperature range for one of the operation modes Heating or Cooling The unit CANNOT operate in the mode for which the outdoor temperature is outside its temperature range See the...

Page 41: ...4 way valve coil c 4 way valve body 2 Cut all tie straps that fix the 4 way valve coil harness 3 Disconnect the 4 way valve coil connector from the appropriate PCB 4 To install the 4 way valve coil se...

Page 42: ...the 4 way valve pipe ends 7 Stop the nitrogen supply when the piping has cooled down 8 To install the 4 way valve body see 2 1 2 Repair procedures 441 To install the 4 way valve body 1 Remove the coil...

Page 43: ...circuit see 3 2 2 Repair procedures 4133 To install the 4 way valve coil 1 Install the 4 way valve coil on the 4 way valve body c a b a Screw b 4 way valve coil c 4 way valve body 2 Install and tighte...

Page 44: ...o the compressor when it tries to operate Judge if a mechanical lock is present INFORMATION If you have a multimeter with data logging functionality record the current in 1 of the U V W wires at compr...

Page 45: ...the compressor dampers for any damage a a 1 Damper INFORMATION The compressor dampers may look different Compressor dampers are in a good condition Action Yes Perform an electrical check of the compre...

Page 46: ...ctors on the compressor wire terminals to allow correct connection during installation V U W U Wire terminal U V Wire terminal V W Wire terminal W CAUTION Before measuring the compressor motor winding...

Page 47: ...e terminal W 7 Install the compressor insulation 8 Turn ON the power using the respective circuit breaker 9 Start the unit operation via the user interface 10 Wait for or create condition to operate t...

Page 48: ...ce 1 Turn OFF the respective circuit breaker DANGER RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF to be sure the rectifier voltage is below 10 V DC b...

Page 49: ...air procedures To remove the compressor Prerequisite Stop the unit operation via the user interface Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see...

Page 50: ...ng installation V U W U Wire terminal U V Wire terminal V W Wire terminal W 4 Cut the compressor pipes below the soldered joint using a pipe cutter a a a Compressor pipe 5 Supply nitrogen to the refri...

Page 51: ...emove the bushings and keep them for re use 11 To install the compressor see 2 2 2 Repair procedures 449 To install the compressor 1 Check the state of the dampers Replace if worn 2 Install the 3 damp...

Page 52: ...any other components near the compressor and solder the compressor pipes to the refrigerant pipes a a a Compressor pipe CAUTION Overheating the compressor pipes and the oil inside the compressor pipe...

Page 53: ...ical check of the expansion valve Prerequisite Power OFF the unit for 3 minutes Then turn ON the unit and listen to the expansion valve assembly If the expansion valve does NOT make a latching sound c...

Page 54: ...ctrical check of the expansion valve see 2 3 1 Checking procedures 453 No Replace the expansion valve body see 2 3 2 Repair procedures 456 To perform an electrical check of the expansion valve 1 First...

Page 55: ...nterface 3 With the unit operating connect the service monitoring tool to the unit 4 When the expansion valve is closed according to the service monitoring tool check the inlet and outlet of the valve...

Page 56: ...et and outlet of the valve with a contact thermometer or use an expansion valve stethoscope to see if refrigerant flows through the expansion valve Result Refrigerant MUST flow through the expansion v...

Page 57: ...position of the expansion valve coil before removal a b a Expansion valve motor b Expansion valve motor harness INFORMATION The expansion valve and motor can have a different configuration layout 4 C...

Page 58: ...figuration layout 3 Cut the expansion valve pipes using a pipe cutter 4 Remove the expansion valve body 5 Supply nitrogen to the refrigerant circuit The nitrogen pressure MUST NOT exceed 0 02 MPa 6 He...

Page 59: ...it 4 After soldering is done stop the nitrogen supply after the component has cooled down a b c a Putty b Expansion valve pipe c Expansion valve body a b a Expansion valve pipe b Expansion valve body...

Page 60: ...B WARNING When reconnecting a connector to the PCB make sure to connect it on the correct location and do NOT apply force as this may damage the connector or connector pins of the PCB 4 Fix the expans...

Page 61: ...he expansion valve motor harness using new tie straps 5 Install the insulation cap on the expansion valve motor if applicable Is the problem solved Action Yes No further actions required No Return to...

Page 62: ...ng between the high pressure switch and the appropriate PCB If NO continuity is measured repair as needed see 5 2 Wiring diagram 4142 4 Measure the resistance between the Faston connections of the hig...

Page 63: ...res To remove the high pressure switch Prerequisite Stop the unit operation via the user interface Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see...

Page 64: ...ressure switch and solder the high pressure switch pipe to the refrigerant pipe a c b b a High pressure switch b Faston connector c High pressure switch pipe CAUTION Overheating the pressure switch wi...

Page 65: ...ures 464 No Replace the DC fan motor assembly see 2 5 2 Repair procedures 465 To perform an electrical check of the DC fan motor assembly Prerequisite First perform a mechanical check of the DC fan mo...

Page 66: ...fan motor cover for easier removal a a Indoor unit fan motor cover 3 Remove the rubber from the indoor unit 4 Remove the indoor unit fan motor from the indoor unit 5 To install the indoor unit fan mot...

Page 67: ...he indoor unit main PCB Prerequisite Stop the unit operation via the user interface Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 2 10 Plate work...

Page 68: ...rt number corresponds with the spare part number indicated in the webbank Is the correct spare part for the indoor unit PCB installed Action Yes Return to 2 6 1 Checking procedures 467 of the indoor u...

Page 69: ...s 467 of the indoor unit main PCB and continue with the next procedure Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions...

Page 70: ...quisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 2 10 Plate work 4101 1 Disconnect all connectors from the indoor unit main PCB 2 Carefully pull the indo...

Page 71: ...the problem solved Action Yes No further actions required No Return to 2 6 1 Checking procedures 467 of the indoor unit main PCB and continue with the next procedure To remove a fuse of the indoor un...

Page 72: ...k of the inverter PCB Prerequisite Stop the unit operation via the user interface Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 2 10 Plate work 4...

Page 73: ...ansistor check operation may damage the compressor INFORMATION Wait for 3 minutes for the power transistor check operation to start 6 All LED s on the Inverter Analyzer must lit 7 Turn off the respect...

Page 74: ...es As the inverter PCB is integrated in the main PCB of the unit see 2 8 Main PCB 474 for the repair procedures 2 8 Main PCB 2 8 1 Class 20 42 units Checking procedures INFORMATION It is recommended t...

Page 75: ...er supply to the unit see 3 1 2 Repair procedures 4128 To check the HAP LED of the main PCB Prerequisite First check the power supply to the main PCB see Checking procedures 474 1 Locate the HAP LED o...

Page 76: ...g of the main PCB Prerequisite First perform all earlier main PCB checks see Checking procedures 474 Prerequisite Stop the unit operation via the user interface 1 Turn OFF the respective circuit break...

Page 77: ...n PCB and continue with the next procedure To check the rectifier voltage of the main PCB Prerequisite First perform all earlier main PCB checks see Checking procedures 474 1 Turn ON the power of the...

Page 78: ...ectifier voltage is NOT OK replace the main PCB Below procedure describes how to check the diode module itself Prerequisite Stop the unit operation via the user interface 2 Turn OFF the respective cir...

Page 79: ...ration via the user interface 1 Turn OFF the respective circuit breaker DANGER RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF to be sure the rectifier...

Page 80: ...Check the power module IPM2 in reference with the image and the table below e d a b c a U b V c W d DC e DC INFORMATION When measuring on the front of the main PCB make sure to locally remove the pro...

Page 81: ...urn OFF the respective circuit breaker Prerequisite Remove the required plate work see 2 10 Plate work 4101 1 Disconnect all connectors from the main PCB 2 Disconnect the power supply wires from the m...

Page 82: ...ound wires through the ferrite core s Install the ground wiring on the switch box and fix using the screw 5 Route the reactor wires towards the reactor and connect the Faston connectors to the reactor...

Page 83: ...use from the PCB a a Fuse 2 To install a fuse on the main PCB see Repair procedures 481 To install a fuse on the main PCB WARNING For continued protection against risk of fire replace only with same t...

Page 84: ...urn ON the power of the unit 2 Measure the voltage between the black and white wires Result The measured voltage MUST be 230 V AC a b a Black wire b White wire Is the measured voltage on the PCB corre...

Page 85: ...uisite First perform all earlier main PCB checks see Checking procedures 484 1 Visit your local spare parts webbank 2 Enter the model name of your unit and check if the installed spare part number cor...

Page 86: ...her actions required No Return to Checking procedures 484 of the PCB and continue with the next procedure To check the fuse of the main PCB Prerequisite First perform all earlier main PCB checks see C...

Page 87: ...orm a check of the power module see Checking procedures 484 No Replace the main PCB see Repair procedures 489 To perform a diode module check 1 First check the rectifier voltage of the main PCB see Ch...

Page 88: ...c d O L c a 0 51 0 52 V a c O L 4 If the diode module is NOT OK replace the main PCB see Repair procedures 489 To perform a power module check Prerequisite First check the rectifier voltage of the ma...

Page 89: ...O L W DC 0 501 V DC W O L DC U 0 501 V U DC O L DC V 0 501 V V DC O L DC W 0 501 V W DC O L Are the test results OK Action Yes Power module is OK Return to Checking procedures 484 of the main PCB and...

Page 90: ...ector h Tie strap compressor harness i Ferrite core compressor harness j Screw k Main PCB 3 Remove the screw and remove the ground wiring from the switch box Route the ground wire out of the ferrite c...

Page 91: ...nd connect the compressor connector 5 Install new tie straps to fix the compressor harness to the switch box 6 Route the ground wire through the ferrite core Install the ground wiring on the switch bo...

Page 92: ...ssembly damaged Action Yes Replace the propeller fan blade assembly see Repair procedures 494 No Perform a mechanical check of the DC fan motor assembly see Checking procedures 492 To perform a mechan...

Page 93: ...e next step 5 Turn OFF the unit via the user interface 6 Turn OFF the respective circuit breaker DANGER RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF...

Page 94: ...wly rotate the fan blade propeller 1 turn and measure the voltage on the DC fan motor connector pins 10 12 Result 4 pulses MUST be measured 13 Repeat the previous step and measure the voltage on the D...

Page 95: ...lightly bend the harness retainers to detach the DC fan motor harness 7 Remove the 4 screws that fix the DC fan motor assembly 8 Remove the DC fan motor assembly from the unit 9 To install the DC fan...

Page 96: ...ure 2 9 2 Class 50 71 units Checking procedures INFORMATION It is recommended to perform the checks in the listed order To perform a mechanical check of the propeller fan blade assembly Prerequisite S...

Page 97: ...on Yes Perform an electrical check of the DC fan motor assembly see Checking procedures 496 No Replace the DC fan motor assembly see Repair procedures 499 To perform an electrical check of the DC fan...

Page 98: ...fan motor see Repair procedures 499 9 Turn ON the power of the unit 10 With the DC fan motor connector S70 disconnected from the inverter PCB measure the voltage on the connector pins 4 7 fan motor po...

Page 99: ...of the main PCB see Checking procedures 474 No Replace the DC fan motor see Repair procedures 499 Problem solved After all checking procedures listed above have been performed Is the problem solved A...

Page 100: ...ach the DC fan motor harness 7 Remove the 4 screws that fix the DC fan motor assembly 8 Remove the DC fan motor assembly from the unit 9 To install the DC fan motor assembly see Repair procedures 499...

Page 101: ...2E 2021 02 a b a Nut b Propeller fan blade assembly Is the problem solved Action Yes No further actions required No Return to Checking procedures 496 of the outdoor unit fan motor and continue with th...

Page 102: ...ust an example and may differ on some details for your actual unit Prerequisite Stop the unit operation via the user interface 1 Turn OFF the respective circuit breaker DANGER RISK OF ELECTROCUTION Wa...

Page 103: ...plate To remove the compressor sound insulation INFORMATION This procedure is just an example and may differ on some details for your actual unit Prerequisite Remove the front plate see 2 10 Plate wo...

Page 104: ...t Sensira R32 ESIE18 12E 2021 02 a b a Insulation b Main PCB 2 Disconnect all connectors from the main PCB 3 Disconnect the electrical power supply wiring from the wire terminals f a d c b e a Electri...

Page 105: ...e assembly 7 Cut the cable tie a b a Cable tie b Switch box 8 Lift and remove the switch box from the outdoor unit 9 To install the switch box see 2 10 Plate work 4101 To install the switch box INFORM...

Page 106: ...ectrical power supply wiring to the wire terminals 4 Install the wire clamp and fix it using the screws 5 Connect all connectors to the main PCB INFORMATION Use the wiring diagram and connection diagr...

Page 107: ...32 ESIE18 12E 2021 02 a b a Cable tie b Switch box 7 Install the insulation on the upper side of the switch box a b a Insulation b Main PCB 2 10 2 Indoor unit To open the front panel 1 Hold the front...

Page 108: ...nel shaft on 1 side will be disconnected 3 Disconnect the front panel shaft on the other side in the same manner a a Front panel shaft To open the service cover 1 Remove 1 screw from the service cover...

Page 109: ...le push it up and then toward you 1 2 To remove the electrical wiring box cover 1 Remove the front grille 2 Remove 1 screw from the electrical wiring box 3 Open the electrical wiring box cover by pull...

Page 110: ...3 Remove the screws to disconnect the grounding wires from the heat exchanger a a b c d e a Grouding wire screw b Heat exchanger thermistor c Indoor unit PCB d Switch box screw e Switch box 4 Disconne...

Page 111: ...ack on the front grille 3 Install the air filter and then mount the front panel 2 11 Reactor 2 11 1 Checking procedures To perform an electrical check of the reactor Prerequisite Stop the unit operati...

Page 112: ...128 7 m Is the resistance measurement correct Action Yes Return to the troubleshooting of the specific error and continue with the next step No Replace the reactor see 2 11 2 Repair procedures 4114 Cl...

Page 113: ...rect Action Yes Proceed with the next step No Replace the reactor see 2 11 2 Repair procedures 4114 4 Measure the inductance of the reactor using an LCR meter Result The inductance MUST be as follows...

Page 114: ...terface Prerequisite Turn OFF the respective circuit breaker 1 Remove the required plate work see 2 10 Plate work 4101 2 Remove the Faston connectors to disconnect the wires from the reactor 3 Remove...

Page 115: ...k 4101 1 Disconnect the swing flap motor connector from the indoor unit main PCB 2 Measure the resistance between the following pins of the motor connector Result The measurements MUST be as shown in...

Page 116: ...ing flap motor from the swing flap 5 To install the swing flap motor see 2 12 2 Repair procedures 4115 To install the swing flap motor 1 Install the swing flap motor in the correct location on the swi...

Page 117: ...g or ambient for air thermistor Is the thermistor correctly installed thermal contact between the thermistor and the piping Action Yes Perform an electrical check of the specific thermistor see Checki...

Page 118: ...2 S27 1 2 on display PCB B Heat exchanger thermistor R2T Main I U S32 1 2 A 4 Determine the thermistor resistance that matches the measured temperature Thermistor Table A T C k T C k T C k T C k 20 19...

Page 119: ...61 46 26 44 05 41 95 31 32 33 34 35 36 37 38 39 15 43 14 79 14 18 13 59 13 04 12 51 12 01 11 52 11 06 61 62 63 64 65 66 67 68 69 4 70 4 54 4 38 4 23 4 08 3 94 3 81 3 68 3 56 Thermistor Table B T C k...

Page 120: ...erface display replace the applicable PCB INFORMATION See the overview of the thermistors at the start of the procedure and the 5 2 Wiring diagram 4142 to determine if the specific thermistor is eithe...

Page 121: ...e respective circuit breaker Prerequisite Remove the required plate work see 2 10 Plate work 4101 1 Disconnect the connector from the display PCB 2 Press the latches to unlock and remove the display P...

Page 122: ...the thermistor INFORMATION Some of the thermistors are wired to the same connector See connector and pin information of the thermistors at the start of the electrical check procedure and 5 2 Wiring d...

Page 123: ...ay PCB in the correct location on the unit 2 Connect the connector to the display PCB Other refrigerant side thermistors 3 Install the thermistor in the thermistor holder as follows For outdoor unit a...

Page 124: ...g a connector to the PCB make sure to connect it on the correct location and do NOT apply force as this may damage the connector or connector pins of the PCB 7 Fix the thermistor harness using new tie...

Page 125: ...18 32 17 54 16 80 51 52 53 54 55 56 57 58 59 6 91 6 65 6 41 6 65 6 41 6 18 5 95 5 74 5 14 0 65 84 30 16 10 60 4 87 1 2 3 4 5 6 7 8 9 62 54 59 43 56 49 53 71 51 09 48 61 46 26 44 05 41 95 31 32 33 34 3...

Page 126: ...ira R32 ESIE18 12E 2021 02 INFORMATION All thermistors have a resistance tolerance of 3 Does the measured resistance of the thermistor match with the temperature determined resistance Action Yes Therm...

Page 127: ...on the power supply terminal X1M Result The voltage MUST be 230 V AC 10 5 Unbalance between the phases MUST NOT exceed 2 Is the measured voltage power supply correct Action Yes Return to the troublesh...

Page 128: ...ng as needed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 3 1 2 Repair procedures To adjust...

Page 129: ...to the troubleshooting of the specific error and continue with the next procedure 3 2 Refrigerant circuit 3 2 1 Checking procedures INFORMATION It is recommended to perform the checks in the listed o...

Page 130: ...2 5 4K an internal pipe obstruction may be present at this location INFORMATION Focus on positions with a potential risk for clogging such as Filters Valves Brazing points INFORMATION A bigger temper...

Page 131: ...amount Higher degree of overcharge Degree of overcharge To maintain high pressure frequency decreases under the capacity control Low pressure drops due to closed outdoor unit electronic expansion valv...

Page 132: ...o compressor capacity decreasing Operating frequency comes to the lowest level Heating Frequency Low pressure High pressure Proper amount Higher degree of shortage Degree of refrigerant shortage To ma...

Page 133: ...e the refrigerant see 3 2 2 Repair procedures 4133 No Return to the troubleshooting of the specific error and continue with the next procedure To perform a pressure test of the refrigerant circuit 1 P...

Page 134: ...repaired See also Repair information 4135 for more details Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the nex...

Page 135: ...iate equipment and tools according to the refrigerant and unit type R32 can be charged in gas phase Make sure to use a digital scale no charging cylinder Execute correct vacuum drying procedure after...

Page 136: ...apply insulation removed during repair Pipe expansion flare making Remove any burrs on the cut surface using the correct tool such as reamer or scraper note that excessive deburring can thin the pipe...

Page 137: ...e troubleshooting of the specific error and continue with the next procedure No Wait for the outdoor temperature to return within the operating range To check for objects that may block the airflow 1...

Page 138: ...indoor unit heat exchanger 1 Straighten the hair fins 2 Clear the indoor unit heat exchanger from dust using a fin comb or compressed air N2 CAUTION Avoid bending or damaging the hair fins of the ind...

Page 139: ...lem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 4 4 To clean the air filters 1 Push the tab at the centre...

Page 140: ...0 25B FTXF20 42C ATXF20 71A ATXF20 42C RXF20 71A RXF20 60B RXF20 42C ARXF20 71A ARXF20 42C Split Sensira R32 ESIE18 12E 2021 02 Is the problem solved Action No Return to the troubleshooting of the spe...

Page 141: ...information setting mode 5 1 1 Detailed information setting mode Indoor unit See the installer reference guide on business portal for more information 5 1 2 Detailed information setting mode Outdoor u...

Page 142: ...ram English Translation Wiring diagram Wiring diagram Indoor Indoor Outdoor Outdoor Transmission circuit Transmission circuit Signal receiver Signal receiver Wireless remote control Wireless remote co...

Page 143: ...gnetic relay PCB1 PCB2 PCB3 Printed circuit board R1T Room thermistor R2T Suction pipe thermistor S6 S602 Connector S1W Operation switch V2 Varistor X1M Terminal strip Z C Ferrite core FTXF50 71A ATXF...

Page 144: ...When the main power is turned off and then back on again operation will resume automatically 3 Legend FG HE S6 S900 Connector F1U FU1 Fuse T1R L301 Transformer M1F Fan motor M S Swing flap motor K1R...

Page 145: ...Wiring diagram English Translation Wiring diagram Wiring diagram Indoor Indoor Outdoor Outdoor Condenser Condenser Discharge Discharge 2 Notes English Translation Note Note Connection X1M Main termin...

Page 146: ...S20 S90 Connector V2 V3 Varistor X1M Terminal strip Y1S Reversing solenoid valve coil PTC1 Thermistor Y1E Electronic expansion valve Z C Noise filter ferrite core Z F Noise filter RXF50A 1 Wiring dia...

Page 147: ...1C Compressor motor M1F Fan motor MR Magnetic relay N Neutral PAM Pulse amplitude modulation PCB Printed circuit board PS Switching power supply Q1L Overload protector R1T R2T R3T Thermistor S2 S90 Te...

Page 148: ...pply PCB Protective earth Earth Field wire NOTES GRY Grey BLK Black WHT White BRN Brown RED Red GRN Green YLW Yellow ORG Orange BLU Blue For the power requirements refer to the nameplate 3 Legend C Ca...

Page 149: ...arrestor V1 V2 V3 Varistor X11A X14A Connector X1M Terminal strip Y1E Electronic expansion valve coil Y1S Reversing solenoid valve coil Z C Ferrite core Z F Noise filter RXF71A RXF50 60B ARXF50 71A 1...

Page 150: ...HN1 S U V W Connector FU1 FU2 FU3 Fuse IPM Intelligent power module L Live M1C Compressor motor M1F Fan motor MR Magnetic relay N Neutral N 4 N 5 Number of passes PAM Pulse amplitude modulation PCB P...

Page 151: ...t FTXF20 35A 6 4CuT 9 5CuT 9 5CuT 6 4CuT a b c d R2T M1F a Field piping liquid 6 4 mm flare connection b Field piping gas 9 5 mm flare connection c Crossflow fan d Heat exchanger M1F Fan motor R2T The...

Page 152: ...35C 6 4CuT 9 5CuT 9 5CuT 6 4CuT a b c d R2T M1F a Field piping liquid 6 4 mm flare connection b Field piping gas 9 5 mm flare connection c Crossflow fan d Heat exchanger M1F Fan motor R2T Thermistor h...

Page 153: ...T M1F 6 4CuT 6 4CuT 9 5CuT 9 5CuT a Field piping liquid 6 4 mm flare connection b Field piping gas 9 5 mm flare connection c Crossflow fan d Heat exchanger M1F Fan motor R2T Thermistor heat exchanger...

Page 154: ...7CuT 6 4CuT a b c d R2T M1F e a Field piping liquid 6 4 mm flare connection b Field piping gas 12 7 mm flare connection c Crossflow fan d Heat exchanger e Distributor M1F Fan motor R2T Thermistor hea...

Page 155: ...eld piping gas 9 5 mm flare connection c Stop valve liquid d Stop valve with service port gas e Muffler with filter f Heat exchanger g Accumulator h Muffler M1C Compressor M1F Fan R1T Thermistor outdo...

Page 156: ...ping liquid 6 4 mm flare connection b Field piping gas 9 5 mm flare connection c Stop valve liquid d Stop valve with service port gas e Muffler with filter f Heat exchanger g Accumulator h Muffler M1C...

Page 157: ...onnection c Stop valve liquid d Stop valve gas e Muffler f Liquid receiver g Filter h Muffler with filter i Heat exchanger j Accumulator M1C Compressor M1F Fan R1T Thermistor outdoor air R2T Thermisto...

Page 158: ...ection c Stop valve liquid d Stop valve gas e Muffler f Liquid receiver g Filter h Muffler with filter j Heat exchanger j Accumulator M1C Compressor M1F Fan R1T Thermistor outdoor air R2T Thermistor h...

Page 159: ...valve gas e Muffler f Liquid receiver g Filter h Muffler with filter i Heat exchanger j Accumulator M1C Compressor M1F Fan R1T Thermistor outdoor air R2T Thermistor heat exchanger R3T Thermistor comp...

Page 160: ...3T Y1E Y1S e e e i j S1PH M1F a Field piping liquid 6 4 mm flare connection b Field piping gas 12 7 mm flare connection c Stop valve liquid d Stop valve gas e Muffler f Liquid receiver g Filter h Muff...

Page 161: ...F20 60B RXF20 42C ARXF20 71A ARXF20 42C Split Sensira R32 ESIE18 12E 2021 02 5 4 Component overview 5 4 1 Component overview Indoor unit a b c d e f h g a Heat exchanger b Heat exchanger thermistor R2...

Page 162: ...erview Outdoor unit i j h k l n m o p q a b c d e f g h m m a Air thermistor R1T j Service PCB b Heat exchanger k High pressure switch NOT for RXF50A c Expansion valve l Discharge pipe thermistor R3T...

Page 163: ...data Service manual 163 FTXF20 71A FTXF20 25B FTXF20 42C ATXF20 71A ATXF20 42C RXF20 71A RXF20 60B RXF20 42C ARXF20 71A ARXF20 42C Split Sensira R32 ESIE18 12E 2021 02 5 5 Field information report Se...

Page 164: ...tion is required Please fill out the following form before contacting your distributor FIELD INFORMATION REPORT Key person information Name Company name Your contact details Phone number E mail addres...

Page 165: ...CB A1P Software version hydro PCB A5P Software version user interface Software version outdoor PCB Minimum water volume Maximum water volume Brine composition and mixture Brine freeze up temperature S...

Page 166: ...1 For an overview of the available service tools check the Business Portal http www mydaikin eu 2 Go to the tab After sales support on the left navigation pane and select Technical support 3 Click th...

Page 167: ...1 Field settings Indoor unit To control the indoor unit fan during thermostat off in cooling INFORMATION As this unit has no remote controller installed order the remote controller ARC480A1 separately...

Page 168: ...e with people 1 Cut the jumper J6 on the circuit board using nippers or a similar tool to expand the operation range of the outdoor unit down to 15 C INFORMATION The outdoor unit will stop operating w...

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Daikin Sensira Series, Service Manual

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