Daikin 2MXM40M Service Manual Download Page 65

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ESIE16-02B

Part 3. Repair

3.2. Service tools

4/04/17

Version 1.1

Page 65

RA R32 Split & multi split M-Series

3.2. Service tools

For an overview of the applicable service tools, please check the Daikin Business Portal: http://www.mydaikin.eu

Go to the tab “After-sales support” on the left side and then select “Technical support”.

You will then find a button “Service tools” which gives you an overview on which service tool to use for which product. Also
additional information on the service tool (instruction, latest software) can be found there.

Summary of Contents for 2MXM40M

Page 1: ...Service Manual RA R32 Split multi split M Series ESIE16 02B Indoor unit Outdoor unit FTXJ M FTXM M FTXP KV FDXM F RXJ M RXM M MXM M MXM N ...

Page 2: ...s knowledge No express or implied warranty is given for the completeness accuracy reliability or fitness for particular purpose of its content and the products and services presented therein Specifications are subject to change without prior notice Daikin Europe N V explicitly rejects any liability for any direct or indirect damage in the broadest sense arising from or related to the use and or in...

Page 3: ...e up protection Heating peak cut control 22 2 2 1 4 A6 00 Fan motor abnormality 22 2 2 1 5 C4 00 Liquid pipe thermistor for heat exchanger abnormality 23 2 2 1 6 C7 00 Front panel open close fault 23 2 2 1 7 C9 00 Suction air thermistor abnormality 23 2 2 1 8 UH 00 Anti icing function in other room s 24 2 2 2 Outdoor unit 25 2 2 2 1 E1 00 Outdoor unit PCB abnormality 25 2 2 2 2 E3 00 Discharge pre...

Page 4: ...or unit 44 2 4 1 1 Fan motor 44 2 4 2 Outdoor unit 45 2 4 2 1 4 way valve 45 2 4 2 2 Compressor 47 2 4 2 3 Electronic expansion valve 49 2 4 2 4 Fan motor 51 2 4 2 5 High pressure sensor 52 2 4 2 6 Main PCB 53 2 4 2 7 Pressure sensor 54 2 4 2 8 Refrigerant thermistors 56 2 4 3 System 58 2 4 4 Others 58 2 5 Other capacity range 59 Part 3 Repair 61 3 1 Refrigerant repair procedures 61 3 1 1 Refriger...

Page 5: ...utdoor unit 99 5 3 2 1 2MXM50M 99 5 3 2 2 3MXM68M 99 5 3 2 3 4MXM M 100 5 3 2 4 5MXM M 100 5 3 2 5 RXJ20 35M 101 5 3 2 6 RXJ50M 101 5 3 2 7 RXM20 35M 101 5 3 2 8 RXM42 50M 102 5 3 2 9 RXM60 71M 102 5 3 2 10 RXM71M 103 5 3 3 Field wiring 103 5 4 Piping diagram 104 5 4 1 Indoor unit 104 5 4 2 Outdoor unit 104 5 4 2 1 2MXM40M 104 5 4 2 2 3MXM68M 105 5 4 2 3 4MXM68M 105 5 4 2 4 5MXM M 106 5 4 2 5 RXJ2...

Page 6: ...ESIE16 02B Page 6 4 04 17 Version 1 1 RA R32 Split multi split M Series 5 7 Switch box 111 5 7 1 Indoor unit 111 5 7 2 Outdoor unit 111 5 8 Field information report 112 ...

Page 7: ...gs 94 Figure 5 3 Service PC board wiring error check switch location 94 Figure 5 4 Dip switch location 95 Figure 5 5 S15 connector location 96 Figure 5 6 Jumper location 96 Figure 5 7 Wiring diagram outdoor unit 2MXM50M 99 Figure 5 8 Wiring diagram outdoor unit 3MXM68M 99 Figure 5 9 Wiring diagram outdoor unit 4MXM M 100 Figure 5 10 Wiring diagram outdoor unit 2MXM50M 100 Figure 5 11 Wiring diagra...

Page 8: ...ESIE16 02B Page 8 4 04 17 Version 1 0 RA R32 Split multi split M Series Figure 5 26 Piping diagram outdoor unit RXM71M 109 Figure 5 27 Component overview outdoor unit 110 ...

Page 9: ...lti split M Series Part 1 Introduction This part contains the following chapters 1 1 Version log Version log 9 Safety precautions 10 General operation 13 How to use 14 Version code Description Date ESIE16 02A Document release 21 03 2017 ESIE16 02B Manual also applicable for MXM N 04 04 2017 ...

Page 10: ...night telephone numbers for obtaining service In Europe EN378 provides the necessary guidance for this logbook 1 2 1 Meaning of symbols 1 2 2 Warnings WARNING Indicates a situation that could result in death or serious injury WARNING RISK OF ELECTROCUTION Indicates a situation that could result in electrocution WARNING RISK OF BURNING Indicates a situation that could result in burning because of e...

Page 11: ... on the PCB WARNING RISK OF BURNING Do NOT touch the refrigerant piping water piping or internal parts during and immediately after operation It could be too hot or too cold Give it time to return to normal temperature If you must touch it wear protective gloves Do NOT touch any accidental leaking refrigerant WARNING Always recover the refrigerants Do NOT release them directly into the environment...

Page 12: ...r earth wiring may cause electrical shock Make sure to use a dedicated power circuit NEVER use a power supply shared by another appliance Make sure to check the required fuses and or circuit breakers before starting works WARNING After finishing the electrical work confirm that each electrical component and terminal inside the electrical components box is connected securely Make sure all covers ar...

Page 13: ...et compression ratio is calculated from deviation between actual and target condensation and evaporation temperature Tc condensing temperature is used in heating mode Te evaporation temperature is used if any indoor unit operates in cooling mode The evaporating temperature in the heat exchanger is controlled by the electronic expansion valve When indoor unit is selecting heating mode discharge gas...

Page 14: ...s used the Alt Back Arrow keys or the arrow in the top right hand corner of this page can be used to return to the previously viewed page NO YES NO YES N N N N N NO O O O O O Y Y Y Y Y YE E E E E ES S S S S S Is this your 1st encounter with this particular unit I I Is Is Is Is Is t t t t t th h h his with th What do you need to do W Wh Wh Wh Wh Wha at d Is an Error Code displayed I I Is Is Is Is I...

Page 15: ... to repair The possible causes have been sorted to probability of occurrence and speed of execution 1 4 2 3 The repair chapter The chapter Repair on page 61 handles the removal and replacement of the major components in the product and discusses cleaning methods as well if applicable such as for filters Where applicable refrigerant handling precautions are mentioned for certain actions please cons...

Page 16: ...ESIE16 02B Part 1 Introduction 1 4 How to use Page 16 4 04 17 Version 1 0 RA R32 Split multi split M Series ...

Page 17: ...nd malfunction code is displayed Even if stop operation is carried out malfunction contents are displayed when inspection mode is entered The malfunction code enables you to tell what kind of malfunction caused operation to stop 2 1 1 2 How to reset error codes When the problem is solved you can reset the error by pushing the ON OFF button 2 1 1 3 History of error codes Not applicable for this rem...

Page 18: ...AGNOSIS c x x x x x normal check indoor unit c w x w w x high pressure protector activated or freeze up in operating unit or stand by unit c w x w x x overload relay activated or high discharge pipe temperature c x w w x x faulty compressor start c x w x w x input overcurrent c w w x x x thermistor or ct abnormality c w w x w x high temperature switchbox c x x x w x high temperature at inverter ci...

Page 19: ...SIE16 02B Part 2 Troubleshooting 2 1 Error codes check 4 04 17 Version 1 1 Page 19 RA R32 Split multi split M Series 2 1 2 3 History of error codes Not applicable 2 1 2 4 Content of retry Not applicable ...

Page 20: ...ssure abnormality or refrigerant overcharge 29 H0 00 Compressor sensor system abnormality 30 H6 00 Position detection sensor abnormality 30 H8 00 Compressor input CT system abnormality 31 H9 00 Outdoor air temperature thermistor abnormality 31 J3 00 Discharge pipe thermistor abnormality 32 J5 00 Suction pipe thermistor abnormality 32 J6 00 Outdoor heat exchanger thermistor abnormality 32 J8 00 Liq...

Page 21: ...to indoor PCB Adjust power to the indoor PCB Replace indoor PCB when HAP LED is not blinking in regular intervals Install correct spare part or update indoor PCB Adjust wiring to indoor PCB when required Trigger Effect Reset The system cannot set the internal set tings Unit will stop operating Power reset via outdoor unit Possible cause Check Corrective action Wrong models interconnected Check if ...

Page 22: ...es power Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Check the wiring to indoor PCB Adjust power to the indoor PCB Replace indoor PCB when HAP LED is not blinking in regular intervals Install correct spare part or update indoor PCB Adjust wiring to indoor PCB when required Trigger Effect Reset The rotation speed of the fan motor is not detect...

Page 23: ...cing procedures Refrigerant thermistors on page 56 Trigger Effect Reset Shutter limit switch not activated or faulty Unit will stop operating when error occurs 2 times Power reset via outdoor unit Possible cause Check Corrective action Foreign substance in the blow port Check blow port for foreign material Remove foreign material when required Faulty shutter limit switch Check the limit switch con...

Page 24: ...not blinking in regular intervals Install correct spare part or update indoor PCB Adjust wiring to indoor PCB when required Check procedures Replacing procedures Refrigerant thermistors on page 56 Trigger Effect Reset A wrong connection is detected by check ing the combination of the indoor and out door unit on the CPU Operation halt due to freeze up prevention in other room unspecified internal o...

Page 25: ...ty or disturbance of the power supply imbalance 10 Power drop Short cir cuit Check if the power supply is conform with regulations No fluctuations in frequency Adjust power supply when required Power reset via outdoor unit Trigger Effect Reset Discharge pressure above 4 15 MPa Unit will stop operating Automatic reset when high pressure drops below 3 2 MPa Possible cause Check Corrective action Sto...

Page 26: ...ty power module faulty outdoor inverter PCB Check outdoor inverter PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Restore the power to the outdoor inverter PCB Replace the outdoor inverter PCB when required Refrigerant shortage Check for refrigerant shortage Refer to the nameplate for the correct charge Charge the correct refrigerant amount ...

Page 27: ...ore the power to the outdoor main PCB Replace outdoor main PCB when HAP LED is not blinking in regular intervals Faulty outdoor inverter PCB Check outdoor inverter PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Restore the power to the outdoor inverter PCB Replace the outdoor inverter PCB when required Faulty 4 way valve Check the 4 way valv...

Page 28: ...m thermistor indoor heat exchanger are not functioning within oper ation range Unit will not stop operating Automatic reset when unit runs without error for 60 minutes Unit will stop operating Manual reset via user interface Possible cause Check Corrective action Faulty 4 way valve coil Check 4 way valve coil Replace 4 way valve coil when required Faulty 4 way valve body blocked Check 4 way valve ...

Page 29: ...expansion valve Replace the expansion valve body or motor when required Faulty outdoor unit main PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Check if the outdoor main PCB receives power Restore the power to the outdoor main PCB Replace outdoor main PCB when HAP LED is not blinking in regular intervals Faulty discharge thermistor Check dis...

Page 30: ...e part is installed Restore the power to the outdoor inverter PCB Replace the outdoor inverter PCB when required Faulty connection or wiring of the PCB s Check the connections and the wiring of the PCB s Adjust connection or wiring when required Faulty or disturbance of the power supply imbalance 10 Power drop Short cir cuit Check if the power supply is conform with regulations No fluctuations in ...

Page 31: ...the outdoor main PCB receives power Restore the power to the outdoor main PCB Replace outdoor main PCB when HAP LED is not blinking in regular intervals Faulty power module Input current or compressor current too low Faulty outdoor inverter PCB Check outdoor inverter PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Restore the power to the out...

Page 32: ...t circuit Unit will stop operating Automatic reset Possible cause Check Corrective action Faulty outdoor unit main PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Check if the outdoor main PCB receives power Adjust the power to the outdoor main PCB Replace outdoor main PCB when HAP LED is not blinking in regular intervals Faulty suction pipe ...

Page 33: ...thermistor when required Faulty capacity adapter on outdoor PCB Check if the correct adapter is installed Check if the correct spare part is installed Adjust capacity adapter when required Check procedures Replacing procedures Main PCB on page 53 Replacing main PCB on page 84 Refrigerant thermistors on page 56 Replacing thermistors on page 87 Trigger Effect Reset Thermistor input voltage is 4 96 V...

Page 34: ...te for correct charge Replace compressor when required Investigate reason of breakdown Replace expansion valve when required Fix possible leak Faulty or disturbance of the power supply imbalance 10 Power drop Short cir cuit Check if the power supply is conform with regulations No fluctuations in frequency Adjust power supply when required Power reset via outdoor unit Faulty outdoor fan motor Check...

Page 35: ...ature abnormality on page 111 Trigger Effect Reset Radiation fin temperature rise is detected Unit will stop operating Automatic reset Power reset via outdoor unit Possible cause Check Corrective action Faulty outdoor fan motor Check the fan motor Check fan motor connections and wiring Replace fan motor when required Adjust wiring when required Faulty or disturbance of the power supply imbalance 1...

Page 36: ...ired Faulty power module faulty outdoor inverter PCB Check outdoor inverter PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Restore the power to the outdoor inverter PCB Replace the outdoor inverter PCB when required Faulty compressor Check compressor Check connections and wiring of the com pressor Check expansion valve liquid back issue Chec...

Page 37: ... blinking in regu lar intervals Check if the correct spare part is installed Check if the outdoor main PCB receives power Restore the power to the outdoor main PCB Replace outdoor main PCB when HAP LED is not blinking in regular intervals Check procedures Replacing procedures Refrigerant thermistors on page 56 Replacing thermistors on page 87 Main PCB on page 53 Replacing main PCB on page 84 Possi...

Page 38: ...Non condensables in refrigerant Check for non condensables in refriger ant In case of suspicion of non condensables recover vacuum and recharge with virgin refrigerant Faulty compressor Check compressor Check connections and wiring of the com pressor Check expansion valve liquid back issue Check the refrigerant charge Refer to the nameplate for the correct charge Replace compressor when required I...

Page 39: ... wiring when required Momentary drop of voltage Wait until compressor restarts Momentary power failure Wait until compressor restarts Faulty outdoor unit main PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Check if the outdoor main PCB receives power Restore the power to the outdoor main PCB Replace outdoor main PCB when HAP LED is not blink...

Page 40: ... the power to the indoor main PCB Replace indoor main PCB when HAP LED is not blinking in regular intervals Check procedures Replacing procedures Main PCB on page 53 Replacing main PCB on page 84 Fan motor on page 51 Replacing DC fan motor assembly on page 79 Trigger Effect Reset Communication abnormality between out door unit PCB s Unit will stop operating Manual reset via user interface Possible...

Page 41: ... PCB Check if the HAP LED is blinking in regu lar intervals Check if the correct spare part is installed Check if the indoor main PCB receives power Restore the power to the indoor main PCB Replace indoor main PCB when HAP LED is not blinking in regular intervals Check procedures Replacing procedures Main PCB on page 53 Replacing main PCB on page 84 Trigger Effect Reset When the interunit wiring b...

Page 42: ... based troubleshooting Page 42 4 04 17 Version 1 1 RA R32 Split multi split M Series 2 3 Symptom based troubleshooting 2 3 1 Indoor unit Not available yet 2 3 2 Outdoor unit Not available yet 2 3 3 System Not applicable 2 3 4 Others Not applicable ...

Page 43: ...it multi split M Series 2 4 Component checklist Overview of component checklists Indoor unit 44 Fan motor 44 Outdoor unit 45 4 way valve 45 Compressor 47 Electronic expansion valve 49 Fan motor 51 High pressure sensor 52 Main PCB 53 Pressure sensor 54 Refrigerant thermistors 56 System 58 Others 58 ...

Page 44: ...ith the field supplied circuit breaker 3 Remove casing when required PROCEDURE 1 Check fuse on indoor PCB replace if blown 2 Check if fan motor connector is plugged into PCB 3 Power the Daikin unit 4 Check power supply the measured voltage must be 198 240 VAC if not replace indoor PCB Technical specification Description The motor has a single connector for DC power and the rotation counter feed ba...

Page 45: ...fix any leaks If pressure is measured the 4 way valve is stuck in the middle confirm by determining the position of the 4 way valve as described below and replace the 4 way valve refer to Replacing 4 way valve body on page 73 4 While listening to the 4 way valve place a round permanent magnet on the core of the solenoid valve If you do not hear the 4 way valve switching it must be replaced refer t...

Page 46: ...asure the resistance of the 4 way valve coil If the measured resistance does not range 1000 2000 Ω replace the 4 way valve coil refer to Replacing 4 way valve coil on page 75 4 Switch on the Daikin unit start cooling defrost operation If the temperature after the plate type heat exchanger rises the control of the 4 way valve is wrong Replace main PCB 1 Switch off Daikin unit via the user interface...

Page 47: ...he compressor insulation 2 Switch on the Daikin unit and measure the U V W inverter voltages All voltages must be identical if not replace the inverter PCB 3 Switch off the Daikin unit via the user interface 4 Switch off the Daikin unit with the field supplied circuit breaker 5 Disconnect the Faston connectors U V and W from the compressor take picture 6 Measure the compressor motor windings U V V...

Page 48: ...r than 3 MΩ 8 Replace the compressor if the windings and or insulation measurements fail refer to Replacing compressor on page 76 9 Run the compressor and measure the current in each phase the current for each phase should be identical refer to Product specific information on page 111 In that case it can be decided to preventively replace the compressor refer to Replacing compressor on page 76 ...

Page 49: ...dy must be replaced refer to Replacing expansion valve body on page 81 PRELIMINARY ACTIONS 1 Switch off the Daikin unit via the user interface 2 Switch off the Daikin unit with the field supplied circuit breaker 3 Remove plate work when required refer to Basic removal on page 68 PROCEDURE 1 Check if the electrical connector of the expansion valve coil was correctly connected to the PCB if not conn...

Page 50: ...50 4 04 17 Version 1 1 RA R32 Split multi split M Series Connector pin 2 6 connected Connector pin 3 6 connected Connector pin 4 6 connected 3 If one or more of the windings have no continuity replace the expansion valve coil Harness 5P 6P Connector Check 1 6 3 2 4 ...

Page 51: ...ith the field supplied circuit breaker 3 Remove plate work when required refer to Basic removal on page 68 PROCEDURE 1 Check fuse on PCB replace if blown see table Component checklist on page 111 2 Check if fan motor connector is plugged into PCB 3 Power the Daikin unit 4 Check power supply the measured voltage must be 198 240 VAC if not replace main PCB refer to Replacing main PCB on page 84 Tech...

Page 52: ...3 on the PCB compare the measured voltage with the expected voltage Technical specification Description The pressure sensor is an analog pressure sensor The pressure sensor measures the pressure in the high pressure section of the refrigerant circuit Location Piping diagram Wiring diagram Switch box Component overview of unit See Outdoor unit on page 104 See Outdoor unit on page 99 See Outdoor uni...

Page 53: ...placing main PCB on page 84 Check 2 1 Check if the high pressure sensor connector is plugged into PCB Check 3 1 Measure the voltage across high pressure sensor connector pin 4 3 the measured voltage must be 5 VDC if not replace PCB 2 4 2 6 Main PCB Not available yet INFORMATION If 1 or more checks fail replace the high pressure sensor 5V Red S60 GND Black White High pressure sensor Microcomputer A...

Page 54: ...n the PCB compare the measured voltage with the expected voltage Technical specification Description The pressure sensor is an analog pressure sensor The pressure sensor measures the pressure in the high pressure section of the refrigerant circuit Location Piping diagram Wiring diagram Switch box Component overview of unit See Outdoor unit on page 104 See Outdoor unit on page 99 See Outdoor unit o...

Page 55: ...n PCB refer to Replacing main PCB on page 84 Check 2 1 Check if the high pressure sensor connector is plugged into PCB Check 3 1 Measure the voltage across high pressure sensor connector pin 4 3 the measured voltage must be 5 VDC if not replace PCB INFORMATION If 1 or more checks fail replace the high pressure sensor 5V Red S60 GND Black White High pressure sensor Microcomputer A D input Measure D...

Page 56: ... by the lower and higher temperature 4 If the measured resistance does not match the listed value the thermistor must be replaced E g R3T air thermistor main PCB connector S90 pin 1 2 type 1 Measured temperature with contact thermometer 23 1 C Unplug the sensor and measure the resistance between S90 1 2 21 86 kΩ Technical specification Description A single type of thermistor is used the resistance...

Page 57: ...1 51 09 48 61 46 26 44 05 41 95 21 22 23 24 25 26 27 28 29 23 91 22 85 21 85 20 90 20 00 19 14 18 32 17 54 16 80 41 42 43 44 45 46 47 48 49 10 21 9 81 9 42 9 06 8 71 8 37 8 05 7 75 7 46 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 10 111 99 10 39 96 30 16 10 50 7 18 70 3 44 9 8 7 6 5 4 3 2 1 106 03 100 41 95 14 90 17 85 49 81 08 76 93 73 01 69 32 11 12 13 14 15 16 17 18 ...

Page 58: ...18 97 73 92 61 87 79 83 25 78 97 74 94 71 14 67 56 11 12 13 14 15 16 17 18 19 37 18 35 45 33 81 32 25 30 77 29 37 28 05 26 78 25 59 31 32 33 34 35 36 37 38 39 15 10 14 48 13 88 13 31 12 77 12 25 11 76 11 29 10 84 51 52 53 54 55 56 57 58 59 6 78 6 53 6 53 6 53 6 29 6 06 5 84 5 43 5 05 71 72 73 74 75 76 77 78 79 3 32 3 21 3 11 3 01 2 91 2 82 2 72 2 64 2 55 80 2 47 T C kΩ T C kΩ T C kΩ T C kΩ T C kΩ ...

Page 59: ...ESIE16 02B Part 2 Troubleshooting 2 5 Other capacity range 4 04 17 Version 1 1 Page 59 RA R32 Split multi split M Series 2 5 Other capacity range Not applicable 0 ...

Page 60: ...ESIE16 02B Part 2 Troubleshooting 2 5 Other capacity range Page 60 4 04 17 Version 1 1 RA R32 Split multi split M Series ...

Page 61: ...n a liquid state R32 can be charged in gas phase Make sure to use a digital scale no charging cylinder Execute correct vacuum drying procedure after repair work 0 1 MPa 760 mmHg 750 Torr 1 bar for at least 1 hour Connect the unit according the available service ports refer to Recovery procedure on page 61 Use related field setting where necessary to open expansion valve solenoid valve 3 1 2 Recove...

Page 62: ...ports at the stop valves Connect both stop valve service ports to the manifold In case of 3 service ports at the stop valves Connect 1 hose to the suction stop valve service port and 1 hose to the service port between the expansion valve and outdoor H E 1 Vacuum pump 3 To recovery pump 2 Connect flexible hose to service port 3 stop valve INFORMATION See instruction of the recovery pump supplier ho...

Page 63: ...lid from liquid stop valve and gas stop valve 2 Carry out pump down operation 1 Vacuum pump 2 To recovery pump INFORMATION See instruction of the recovery pump supplier how to recover the refrigerant WARNING RISK OF EXPLOSION When the refrigeration circuit has a leak do not execute pump down with the compressor Use recovery system into separate cylinder Warning explosive hazard exists when executi...

Page 64: ...g repair procedures Make sure to cover open pipe ends during repair work so no dust or moisture can enter Make sure to re apply insulation removed during repair Pipe expansion flare making Remove any burrs on the cut surface and use correct tool such as reamer or scraper note that excessive deburring can thin the pipe walls and cause cracking of the pipe Make sure the flare has the correct size us...

Page 65: ...e tools please check the Daikin Business Portal http www mydaikin eu Go to the tab After sales support on the left side and then select Technical support You will then find a button Service tools which gives you an overview on which service tool to use for which product Also additional information on the service tool instruction latest software can be found there ...

Page 66: ...t 67 Outdoor unit 68 Basic removal 68 Replacing switch box 71 Replacing 4 way valve body 73 Replacing 4 way valve coil 75 Replacing compressor 76 Replacing DC fan motor assembly 79 Replacing expansion valve body 81 Replacing expansion valve motor 82 Replacing main PCB 84 Replacing propeller fan blade assembly 85 Replacing thermistors 87 Setting test mode for inverter checker 88 ...

Page 67: ...ESIE16 02B Part 3 Repair 3 3 Unit specific repair procedures 4 04 17 Version 1 1 Page 67 RA R32 Split multi split M Series 3 3 1 Indoor unit Not applicable ...

Page 68: ...it via the user interface 2 Switch off the Daikin unit with the field supplied circuit breaker PROCEDURE Removal 1 Loosen and remove 1 screw 1 that fix the refrigerant connection cover Figure 3 3 Removing refrigerant connection cover 3 3 2 1 3 Removing the top plate PRELIMINARY ACTIONS 1 Switch off the Daikin unit via the user interface 2 Switch off the Daikin unit with the field supplied circuit ...

Page 69: ... Figure 3 4 Removing the top plate 3 3 2 1 4 Removing the front plate PRELIMINARY ACTIONS 1 Switch off the Daikin unit via the user interface 2 Switch off the Daikin unit with the field supplied circuit breaker PROCEDURE Removal 1 Remove the top plate 2 Loosen and remove the 8 screws 1 that fix the front plate 1 Screw 1 1 ...

Page 70: ...pressor sound insulation PRELIMINARY ACTIONS 1 Switch off the Daikin unit via the user interface 2 Switch off the Daikin unit with the field supplied circuit breaker PROCEDURE Removal 1 Remove the top plate 2 Remove the front plate 3 Remove the compressor sound insulation untwist the cord and remove the insulation Figure 3 6 Removing the compressor sound insulation 1 Screw 1 1 1 1 1 1 ...

Page 71: ...al on page 68 PROCEDURE Removal 1 Remove the insulation 1 2 Unplug all connectors from the main PCB 2 see Component checklist on page 121 3 Remove all electrical power wiring 3 from the wire terminals 4 4 Remove the screws 5 that fix the wire clamp 6 remove the wire clamp 6 5 Remove the screws 7 that fix the right side plate assembly 8 6 Cut the cable tie 9 7 Lift the switch box 10 from the Daikin...

Page 72: ...1 1 RA R32 Split multi split M Series Figure 3 7 Removing the switch box Installation 1 Proceed in reverse order 1 Insulation 6 Wire clamp 2 Main PCB 7 Screw 3 Electrical power wiring 8 Right side plate assembly 4 Wire terminals 9 Cable tie 5 Screw 10 Switch box 7 7 7 8 6 5 3 1 4 9 2 10 ...

Page 73: ...RE Removal 1 Remove any parts that block the way to the 4 way valve 2 Cut the 4 way valve pipes 2 3 Remove the 4 way valve 5 4 Recuperate the putty 3 5 Recuperate the insulation 4 Figure 3 8 Removing the 4 way valve Installation 1 Wrap a wet rag around the 4 way valve 5 INFORMATION Follow local regulations and Daikin refrigerant repair procedures during the repair of your unit refer to Refriger an...

Page 74: ...Unit specific repair procedures Page 74 4 04 17 Version 1 1 RA R32 Split multi split M Series 2 Proceed in reverse order INFORMATION Install the putty on the 4 way valve Install the compressor sound insulation in the same location ...

Page 75: ...en required 4 Remove any part that block the way to the 4 way valve coil PROCEDURE Removal 1 Loosen and remove the screw 1 that fixes the 4 way valve coil 3 2 Cut the tie wraps that fix the 4 way valve coil wiring 3 Unplug 4 way valve connector from PCB Figure 3 9 Removing the 4 way valve coil Installation 1 Proceed in reverse order WARNING RISK OF FIRE When reconnecting a connector to the PCB do ...

Page 76: ...hat blocks the way to the compressor PROCEDURE Removal 1 Remove the terminal cover 3 and unplug the compressor wiring 4 and take picture 2 Using a pipe cutter cut the compressor pipes 5 below the soldered joint 3 Loosen and remove the 3 nuts 6 that fix the compressor 7 4 Remove the compressor 7 5 Remove the dampers 9 with bushings 10 from the compressor 7 6 Recuperate the putty 8 INFORMATION Follo...

Page 77: ... 04 17 Version 1 1 Page 77 RA R32 Split multi split M Series Figure 3 10 Removing the compressor 1 Screw 6 Nut 2 Partition plate assembly 7 Compressor 3 Terminal cover 8 Putty 4 Compressor wiring 9 Dampers 5 Compressor pipe 10 Bushing 1 2 1 3 8 7 4 5 5 8 9 3 3 8 9 ...

Page 78: ...sor pipes cover the compressor pipes with a wet cloth to prevent overheating the compressor and the oil in the compression pipe 6 Proceed in reverse order CAUTION The oil in the compressor is hygroscopic Remove the caps from the compressor piping as late as possible INFORMATION Before installing a new compressor determine the cause of the compressor failure and take all required corrective actions...

Page 79: ...placing propeller fan blade assembly on page 149 PROCEDURE Removal 1 Remove the insulation 1 from the switch box 2 Unplug the fan motor connector 3 from the main PCB 3 Release the fan motor assembly harness 2 from the slot 4 4 Slightly bend the harness retainers 5 to release the fan motor assembly harness 2 5 Loosen and remove the screws 6 that fix the DC fan motor assembly 7 6 Remove the DC fan m...

Page 80: ... 4 04 17 Version 1 1 RA R32 Split multi split M Series Figure 3 11 Removing the DC fan motor assembly Installation 1 Proceed in reverse order 1 Insulation 5 Harness retainer 2 Fan motor assembly harness 6 Screw 3 Connector 7 Fan motor assembly 4 Slot 1 3 2 6 6 7 8 7 5 4 ...

Page 81: ...PROCEDURE Removal 1 Recuperate the putty 1 2 Using a pipe cutter cut the expansion valve body pipes 2 3 Remove the expansion valve body 3 Figure 3 12 Removing the expansion valve Installation 1 Wrap a wet rag around the expansion valve body 3 2 Proceed in reverse order INFORMATION Follow local regulations and Daikin refrigerant repair procedures during the repair of your unit refer to Refriger ant...

Page 82: ...lug expansion valve motor connector from PCB 3 Cut all tie wraps that fix the expansion valve motor 1 wiring Figure 3 13 Removing the expansion valve motor Installation 1 Proceed in reverse order 2 When installing the expansion valve motor 3 lock it on the expansion valve WARNING RISK OF FIRE When reconnecting a connector to the PCB do not apply force as this may damage the connector or connector ...

Page 83: ... 3 Repair 3 3 Unit specific repair procedures 4 04 17 Version 1 1 Page 83 RA R32 Split multi split M Series Figure 3 14 Locking the expansion valve motor 1 Pipe retention clip 3 Expansion valve motor 2 Pipe 1 3 2 Y1S ...

Page 84: ...uit breaker 3 Remove the switch box refer to Replacing switch box on page 71 PROCEDURE Removal 1 Cut the 2 cable ties 1 2 Loosen and remove the screw 2 3 Loosen and remove the 5 screws 3 4 Press the 2 latches 5 to unlock and remove the main PCB 4 Figure 3 15 Removing the main PCB Installation 1 Apply Heat sink compound 6 before joining the main PCB and the heat sink 2 Proceed in reverse order 1 Ca...

Page 85: ...o Replacing propeller fan blade assembly on page 149 PROCEDURE Removal 1 Remove the insulation 1 from the switch box 2 Unplug the fan motor connector 3 from the main PCB 3 Release the fan motor assembly harness 2 from the slot 4 4 Slightly bend the harness retainers 5 to release the fan motor assembly harness 2 5 Loosen and remove the screws 6 that fix the DC fan motor assembly 7 6 Remove the DC f...

Page 86: ... 4 04 17 Version 1 1 RA R32 Split multi split M Series Figure 3 16 Removing the DC fan motor assembly Installation 1 Proceed in reverse order 1 Insulation 5 Harness retainer 2 Fan motor assembly harness 6 Screw 3 Connector 7 Fan motor assembly 4 Slot 1 3 2 6 6 7 8 7 5 4 ...

Page 87: ... required see Basic removal on page 68 PROCEDURE Removal 1 Locate thermistor that needs to be replaced see Component checklist on page 121 2 Cut the tie wraps 1 that fix the insulation 3 and the thermistor wire 2 3 Cut the insulation 3 and remove it 4 Pull the clip 5 that fixes the thermistor 6 5 Remove the thermistor 6 from the thermistor holder 4 Figure 3 17 Replacing a thermistor Installation 1...

Page 88: ...s the MODE button Trial operation is activated 6 Press the ON OFF button Power transistor test operation starts ARC452 ARC433 Series 1 Turn the system on 2 Select FAN operation with the MODE button on the remote controller 3 Press the 3 buttons TEMP TEMP MODE simultaneously 00 is displayed the left digit is blinking 4 Press the MODE button 00 is displayed the right digit is blinking 5 Press the MO...

Page 89: ... high and low pressure becomes low Indoor unit 89 Outdoor unit 90 WARNING Before performing any maintenance power off the unit INFORMATION After all checks are made make sure the water and brine circuits are filled properly again and fluid pressures are in line with regulations 2 bar Cooling Heating Differential between suction temperature and discharge temperature 8 18 C 14 30 C DB 27 C 20 C WB 1...

Page 90: ...efrigerant freezes inside the electronic expansion valve and is basically the same phenomenon as pump down Dirt in the refrigerant clogs filters inside the piping and is basically the same phenomenon as pump down Pressure differential between high and low pressure becomes low CAUTION Make sure not to bend the hair fins COOLING Low pressure High pressure Running current Dirty air filter Higher High...

Page 91: ...i split M Series Part 5 Appendix This part contains the following chapters Field setting 93 Detailed information setting mode 97 Wiring diagram 98 Piping diagram 104 Component overview of unit 110 Product specific information 111 Switch box 111 Field information report 112 ...

Page 92: ...ESIE16 02B Part 5 Appendix Page 92 4 04 17 Version 1 1 RA R32 Split multi split M Series ...

Page 93: ...isplayed at the lower left 4 Press temperature button 1 10 select 4 and press fan button as decision number is displayed at the lower right 5 Press temperature button 0 1 select 0 and press fan button as decision 0 fan ON 1 fan OFF 5 1 1 2 Brightness setting of multi coloured lamp of the indoor unit 5 1 1 3 ON OFF button on the indoor unit 1 Shortly press ON OFF button indoor auto 25 C auto fanspe...

Page 94: ...rror check switch on the outdoor unit service PC board However the wiring error check switch will not function for 3 minutes after the safety breaker is turned on or depending on the outside air conditions see note 2 About 15 20 minutes after the switch is pressed the errors in the connection wiring will be corrected If self correction is not possible check the indoor unit wiring and piping in the...

Page 95: ... all other indoor units do not operate and enter standby mode according to the operation mode of the set indoor unit 1 2 Priority during high power operation If the indoor unit which is set for priority room settings is operating at high power the capabilities of other indoor units will be some what reduced Power supply gives priority to the indoor unit which is set for priority room setting 1 3 Q...

Page 96: ...he connector housing and pins ST products Housing VHR 5N Pin SVH 21T 1 1 Figure 5 5 S15 connector location 5 1 2 2 4 Multi Split outdoor jumper settings Figure 5 6 Jumper location 5 1 3 Remote controller Not applicable 1 S15 connector pins 3 5 J7 Night quiet mode setting J8 Not used J12 Cold region setting for defrost change J22 Not used J23 Econo mode prohibition setting J24 Not used J25 Not used...

Page 97: ...etailed information setting mode RA R32 Split multi split M Series 4 04 17 Version 1 1 Page97 5 2 Detailed information setting mode 5 2 1 Indoor unit Not available 5 2 2 Outdoor unit Not available 5 2 3 Remote controller Not available ...

Page 98: ...ESIE16 02B Part 5 Appendix 5 3 Wiring diagram RA R32 Split multi split M Series Page 98 4 04 17 Version 1 1 5 3 Wiring diagram 5 3 1 Indoor unit Not applicable ...

Page 99: ...1 5 1 5 1 5 M WHT YLW ORG BLU RED M WHT YLW ORG BLU RED M WHT YLW ORG BLU RED Y2S S20 WHT S21 RED S22 BLU A B C S40 4 1 GRY GRY S2PH BLK BLK Q1L X13A BLK BLK P S1PH P BLK 3 MS BLU YLW RED M1C X11A GRN YLW 1 1 1 S501 1 5 S502 A 1 2 3 4 5 S2 SW1 SW3 SW5 SW2 SW4 SW6 LED PCB2 BLK BRN RED ORG YLW GRN BLU PPL GRY WHT SKY BLU BLK BRN RED YLW 1 11 S201 1 5 S202 L803 L804 C54 C56 L803 L804 Ferrite core Wir...

Page 100: ...e arrestor Electronic expansion valve coil Solenoid valve Room Room Room Room Sheet metal Thermistor Liquid pipe Gas pipe Light emitting diode 3D100361A L X1M X2M N 1 2 3 1 2 3 X3M 1 2 3 1 2 3 X4M 1 2 3 1 2 3 B A L N BRN BLU BLK WHT BLK WHT BLK WHT Z1C Z5C Z4C RED YLW BLU 1 S 9 E1 E2 HL1 HN1 FU3 30A ZF SA1 V2 V3 FU1 3 15A MRM20 MRM10 V401 PS DB1 FU2 3 15A DC DC W V U IPM1 MR4 C110 RED BLU BRN ORG ...

Page 101: ... S80 3 1 BLU BLU Y1S MRCW PCB1 Wiring diagram Field wiring Indoor C7 DB1 FU1 FU2 FU3 IPM1 L PAM M1C M1F MRCW MR30 MRM10 MRM20 N Q1L PCB1 S20 S40 S70 S80 S90 R1T R2T R3T SA1 V1 V2 V3 X1M Y1E Y1S Z1C Z2C Z3C Capacitor Diode bridge Fuse Intelligent power module Live Compressor motor Fan motor Magnetic relay Neutral Overload protector Printed circuit board Connector Connection Thermistor Surge arresto...

Page 102: ...Z Pulse amplitude modulation For the power requirements refer to the nameplate 3D090522A 1 2 3 L N L 1 N 2 3 BLK WHT RED n 5 Z3C X1M GRN YLW GRN Z2C n 4 GRN Indoor Outdoor Field wiring Wiring diagram S70 S20 Y1E M1F RED BLU BRN ORG WHT MS 7 1 WHT YLW ORG BLU RED M SA1 V2 V3 FU3 30A HL1 HN1 S ZF MRM10 MRM20 PAM C7 MR30 FU1 3 15A S80 RED RED Y1S 3 1 PS E1 E2 4 FU2 3 15A MS 3 M1C U W Z1C n 4 V X11A W...

Page 103: ... S40 S70 S80 FU1 FU2 FU3 Ferrite core Varistor Connector Magnetic relay Fuse Grey GRY BLU ORG YLW GRN BRN RED WHT BLK Blue Orange Yellow Green Red Brown White Black Earth Protective earth PAM PS N S1PH Y1S SA1 Q1L PCB X1M Reversing solenoid valve coil Electronic expansion valve coil Surge arrestor Connection 6 1 S2PH BLK BLK Q1L X14A BLK BLK P S1PH P BLK S90 X11A HL1 HN1 S E1 E2 MRM20 MRCW R1T R2T...

Page 104: ...way valve Heat exchanger Discharge pipe thermistor Propeller fan ON heating Muffler 7 9CuT Muffler 9 5CuT 9 5CuT Branch pipe 9 5CuT Muffler Gas stop valve Muffler Gas stop valve 9 5CuT 9 5CuT Thermistor gas Thermistor liquid Thermistor gas Room A Room B 9 5CuT 9 5CuT Gas 6 4CuT 6 4CuT EVA EVB Motor operated valve Muffler 6 4CuT Muffler with filter Muffler 9 5CuT 6 4CuT Thermistor liquid Liquid sto...

Page 105: ...g Refnet header S1PH S2PH High pressure switch Manual reset Automatic reset SV Solenoid valve 9 5CuT 9 5CuT 6 4CuT 12 7CuT Heat exchanger thermistor Outdoor air temperature thermistor 15 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 12 7CuT M 12 7CuT A B C 9 5CuT 9 5CuT 12 7CuT 12 7CuT 12 7CuT 12 7CuT Field piping Thermistor gas Refnet header 12 7CuT Gas stop valve 15 9CuT 15 9CuT Muffler Muffler 15 9CuT 15 9C...

Page 106: ...efrigerant flow Refnet header Accumulator Discharge pipe thermistor Thermistor liquid Heating Cooling Refnet header S1PH S2PH High pressure switch Manual reset Automatic reset SV Solenoid valve 9 5CuT 9 5CuT 6 4CuT 12 7CuT 7 9CuT MV D 6 4CuT Room D 6 4CuT D 15 9CuT 12 7CuT Room 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT Liquid receiver Liquid receiver 9 5CuT 9 5CuT Heat exchang...

Page 107: ... Cooling Heating Refrigerant flow Heat exchanger thermistor 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 6 4CuT 6 4CuT 6 4CuT 7 9CuT 7 9CuT 4 0CuT 4 0CuT 4 0CuT 4 0CuT 6 4CuT 6 4CuT 1 2 3 4 1 4 Capillary tube Muffler 9 5CuT 9 5CuT 12 7CuT Receiver gas Filter Gas stop valve with service port 7 0CuT 7 0CuT 9 5CuT 9 5CuT M 4 8CuT 4 8CuT 6 4CuT 6 4CuT Ø 4 0xID 2 0CuT 6 4CuT 6 4CuT 9 5CuT 9 5CuT 9 5CuT 9 ...

Page 108: ... 6 4CuT 7 9CuT 7 9CuT 4 0CuT 4 0CuT 4 0CuT 4 0CuT 6 4CuT 6 4CuT 1 2 3 4 1 4 Capillary tube Muffler 9 5CuT 9 5CuT 12 7CuT Receiver gas Filter Gas stop valve with service port M EV Propeller fan Heat exchanger Outdoor air temperature thermistor Muffler with filter Muffler Muffler 4 way valve ON heating Muffler Discharge pipe thermistor Compressor Accumulator Liquid stop valve Field piping Field pipi...

Page 109: ...Liquid stop valve Gas stop valve with service port Muffler Muffler Compressor Discharge pipe thermistor Propeller fan Outdoor temperature Thermistor Heat exchanger thermistor 4 way valve Accumulator ON heating 7 0 CuT 7 0 CuT 7 0 CuT 7 0 CuT 12 7 CuT 12 7 CuT 12 7 CuT 12 7 CuT 4 0 CuT 4 0 CuT 6 4 CuT 6 4 CuT 6 4 CuT 6 4 CuT 7 0 CuT 7 0 CuT Capillary tube 3 4 0 CuT 9 5 CuT Automatic reset Manual re...

Page 110: ...il lead wire connection room A 3 Thermistor lead wire connector liquid pipe 10 Electronic expansion valve coil lead wire connection room B 4 Fan motor lead wire connector 11 Electronic expansion valve coil lead wire connection room C 5 Four way valve lead wire connector 12 Electronic expansion valve coil lead wire connection room E 6 Compressor lead wire connector 13 Electronic expansion valve coi...

Page 111: ...perature abnormality Set conditions When the compressor is off the radiation fin temperature is above 98 C Automatic reset conditions Unit will automatically reset the error when the radiation fin temperature drops below 75 C for 60 minutes without any other error To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above 83 C and stops when it drops be...

Page 112: ...ESIE16 02B Part 5 Appendix 5 8 Field information report RA R32 Split multi split M Series Page 112 4 04 17 Version 1 1 5 8 Field information report See next page ...

Page 113: ... information is required Please fill out the following form before contacting your distributor FIELD INFORMATION REPORT Key person info Name Company name Your contact details Phone number E mail address Site address Your reference Date of visit Claim info Title Problem description Error code Trouble date Problem frequency Investigation steps done Insert picture of the trouble Current situation sol...

Page 114: ...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 Space heating control leaving water temperature room thermostat ext room thermostat Space heating setpoint Domestic hot water control reheat only schedule only reheat schedule Domestic hot water setpoint ...

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Daikin 2MXM40M, Service Manual

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