Daikin 2MXM68A2V1B User Manual Download

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Installer reference guide

R32 Split series

2MXM68A2V1B

3MXM40A2V1B
3MXM52A2V1B
3MXM68A2V1B

4MXM68A2V1B
4MXM80A2V1B

5MXM90A2V1B

Summary of Contents for 2MXM68A2V1B

Page 1: ...Installer reference guide R32 Split series 2MXM68A2V1B 3MXM40A2V1B 3MXM52A2V1B 3MXM68A2V1B 4MXM68A2V1B 4MXM80A2V1B 5MXM90A2V1B ...

Page 2: ...To provide the installation structure 29 6 3 4 To install the outdoor unit 30 6 3 5 To provide drainage 30 6 3 6 To prevent the outdoor unit from falling over 31 7 Piping installation 32 7 1 Preparing refrigerant piping 32 7 1 1 Refrigerant piping requirements 32 7 1 2 Refrigerant piping insulation 33 7 1 3 Refrigerant piping length and height difference 34 7 2 Connecting the refrigerant piping 35...

Page 3: ...oning 61 12 3 Checklist before commissioning 62 12 4 Checklist during commissioning 62 12 5 Trial operation and testing 63 12 5 1 About wiring error check 63 12 5 2 To perform a test run 64 12 6 Starting up the outdoor unit 65 13 Hand over to the user 66 14 Maintenance and service 67 14 1 Overview Maintenance and service 67 14 2 Maintenance safety precautions 67 14 3 Checklist for yearly maintenan...

Page 4: ...ns specific to the outdoor unit For installation of the indoor unit mounting the indoor unit connecting the refrigerant piping to the indoor unit connecting the electrical wiring to the indoor unit see the installation manual of the indoor unit Documentation set This document is part of a documentation set The complete set consists of General safety precautions Safety instructions that you MUST re...

Page 5: ...XPLOSION Indicates a situation that could result in explosion WARNING Indicates a situation that could result in death or serious injury WARNING FLAMMABLE MATERIAL CAUTION Indicates a situation that could result in minor or moderate injury NOTICE Indicates a situation that could result in equipment or property damage INFORMATION Indicates useful tips or additional information Symbols used on the u...

Page 6: ... A 4MXM A 5MXM A R32 Split series 4P600463 5E 2021 12 Symbol Explanation Indicates a figure title or a reference to it Example 1 3 Figure title means Figure 3 in chapter 1 Indicates a table title or a reference to it Example 1 3 Table title means Table 3 in chapter 1 ...

Page 7: ...ting and applied materials comply with applicable legislation on top of the instructions described in the Daikin documentation CAUTION Wear adequate personal protective equipment protective gloves safety glasses when installing maintaining or servicing the system WARNING Tear apart and throw away plastic packaging bags so that nobody especially children can play with them Possible risk suffocation...

Page 8: ...nt In places where there is a risk of fire due to the leakage of flammable gases example thinner or gasoline carbon fibre ignitable dust In places where corrosive gas example sulphurous acid gas is produced Corrosion of copper pipes or soldered parts may cause the refrigerant to leak Instructions for equipment using R32 refrigerant WARNING MILDLY FLAMMABLE MATERIAL The refrigerant inside this unit...

Page 9: ...shall be designed and installed such as to minimise the likelihood of hydraulic shock damaging the system The indoor equipment and pipes shall be securely mounted and guarded such that accidental rupture of equipment or pipes cannot occur from events such as moving furniture or reconstruction activities CAUTION Do NOT use potential sources of ignition in searching for or detection of refrigerant l...

Page 10: ...min m 2 Ceiling mounted unit a 4 6 13 4 4 6 180 4 8 14 6 4 8 196 5 0 15 8 5 0 213 1 842 5 2 17 1 1 842 5 2 230 1 843 3 64 5 4 18 5 1 843 28 9 5 4 248 2 0 3 95 5 6 19 9 2 0 34 0 5 6 267 2 2 4 34 5 8 21 3 2 2 41 2 5 8 286 2 4 4 74 6 0 22 8 2 4 49 0 6 0 306 2 6 5 13 6 2 24 3 2 6 57 5 6 2 327 2 8 5 53 6 4 25 9 2 8 66 7 6 4 349 3 0 5 92 6 6 27 6 3 0 76 6 6 6 371 3 2 6 48 6 8 29 3 3 2 87 2 6 8 394 3 4 7...

Page 11: ...o oxygen deficiency Toxic gas might be produced if refrigerant gas comes into contact with fire DANGER RISK OF EXPLOSION Pump down Refrigerant leakage If you want to pump down the system and there is a leak in the refrigerant circuit Do NOT use the unit s automatic pump down function with which you can collect all refrigerant from the system into the outdoor unit Possible consequence Self combusti...

Page 12: ...with Liquid filling siphon attached Charge with the cylinder upright A siphon tube is NOT present Charge with the cylinder upside down Open refrigerant cylinders slowly Charge the refrigerant in liquid form Adding it in gas form may prevent normal operation CAUTION When the refrigerant charging procedure is done or when pausing close the valve of the refrigerant tank immediately If the valve is NO...

Page 13: ...use electrical shock or fire When installing the earth leakage protector make sure it is compatible with the inverter resistant to high frequency electric noise to avoid unnecessary opening of the earth leakage protector CAUTION When connecting the power supply connect the earth cable first before making the current carrying connections When disconnecting the power supply disconnect the current ca...

Page 14: ...rm that each electrical component and terminal inside the electrical components box is connected securely Make sure all covers are closed before starting up the unit NOTICE ONLY applicable if the power supply is three phase and the compressor has an ON OFF starting method If there exists the possibility of reversed phase after a momentary black out and the power goes ON and OFF while the product i...

Page 15: ...pe EN378 is the applicable standard Installation site see 6 1 Preparing the installation site 424 CAUTION Check if the installation location can support the unit s weight Poor installation is hazardous It can also cause vibrations or unusual operating noise Provide sufficient service space Do NOT install the unit so that it is in contact with a ceiling or a wall as this may cause vibrations WARNIN...

Page 16: ...ed branch piping and the outdoor unit when only carrying out piping work without connecting the indoor unit in order to add another indoor unit later WARNING Connect the refrigerant piping securely before running the compressor If the refrigerant piping is NOT connected and the stop valve is open when the compressor is run air will be sucked in This will cause abnormal pressure in the refrigeratio...

Page 17: ...reak down Establish proper earthing Do NOT earth the unit to a utility pipe surge absorber or telephone earth Incomplete earthing may cause electrical shock Install the required fuses or circuit breakers Secure the electrical wiring with cable ties so that the cables do NOT come in contact with sharp edges or piping particularly on the high pressure side Do NOT use taped wires stranded conductor w...

Page 18: ...tage MUST be less than 50 V DC before you can touch electrical components For the location of the terminals see the wiring diagram Finishing the outdoor unit installation see 10 Finishing the outdoor unit installation 456 DANGER RISK OF ELECTROCUTION Make sure that the system is earthed properly Turn OFF the power supply before servicing Install the switch box cover before turning ON the power sup...

Page 19: ...ompressor Do NOT use the brazing torch Use approved refrigerants and lubricants only DANGER RISK OF BURNING SCALDING Do NOT touch the compressor with bare hands Troubleshooting see 15 Troubleshooting 469 WARNING When carrying out an inspection on the switch box of the unit ALWAYS make sure that the unit is disconnected from the mains Turn off the respective circuit breaker When a safety device was...

Page 20: ...e MUST be reported immediately to the claims agent of the carrier Bring the packed unit as close as possible to its final installation position to prevent damage during transport When handling the unit take into account the following Fragile handle the unit with care Keep the unit upright in order to avoid damage Prepare the path along which you want to bring the unit inside in advance 4 2 Outdoor...

Page 21: ...the unit on a flat surface Make sure the aluminium fins on the unit are straight before installation If not straighten them with a fin comb field supply 4 2 3 To remove the accessories from the outdoor unit 1 Lift the outdoor unit 2 Remove the accessories from the unit under service cover and from the bottom of the package j i a h 1 1 2 1 6 1 a 1 b c d e 3 1 1 i j g h f ...

Page 22: ...Outdoor unit installation manual b General safety precautions c Fluorinated greenhouse gases label d Multilingual fluorinated greenhouse gases label e Energy label f Screw bag The screws will be used for fixing the electrical wire anchor bands g Drain cap small h Drain cap large i Reducer assembly j Drain socket ...

Page 23: ...r the DHW generator for Multi are considered as 1 room connection For the correct combination see the combination table and the installation manual of the Hybrid for Multi or the DHW generator for Multi WARNING MILDLY FLAMMABLE MATERIAL The refrigerant inside this unit is mildly flammable INFORMATION For the operation limits see the latest technical data of the outdoor unit on the regional Daikin ...

Page 24: ... space for carrying the unit in and out of the site Do NOT install the unit in places often used as work place In case of construction works e g grinding works where a lot of dust is created the unit MUST be covered CAUTION Check if the installation location can support the unit s weight Poor installation is hazardous It can also cause vibrations or unusual operating noise Provide sufficient servi...

Page 25: ...ments 2 General safety precautions 47 7 1 3 Refrigerant piping length and height difference 434 Mind the following spacing guidelines 100 50 350 mm b a 100 50 b a 100 b a b a 350 350 50 b a a Air outlet b Air inlet Allow 300 mm of work space below the ceiling surface and 250 mm for piping and electrical servicing 250 300 mm NOTICE The height of the wall on the outlet side of the outdoor unit MUST ...

Page 26: ...e If the sound is measured under actual installation conditions the measured value might be higher than the sound pressure level mentioned in Sound spectrum in the data book due to environmental noise and sound reflections INFORMATION The sound pressure level is less than 70 dBA In places where a mineral oil mist spray or vapour may be present in the atmosphere Plastic parts may deteriorate and fa...

Page 27: ... c Outdoor unit d Windbreaker The outdoor unit is designed for outdoor installation only and for ambient temperatures within the following ranges unless otherwise specified in the operation manual of the connected indoor unit Cooling mode Heating mode 10 46 C DB 15 24 C DB 6 1 2 Additional installation site requirements of the outdoor unit in cold climates Protect the outdoor unit against direct s...

Page 28: ... If lateral snowfall is possible make sure that the heat exchanger coil is NOT affected by the snow If necessary install a snow cover or shed and a pedestal 6 2 Opening the unit 6 2 1 About opening the unit At certain times you have to open the unit Example When connecting the refrigerant piping When connecting the electrical wiring When maintaining or servicing the unit DANGER RISK OF ELECTROCUTI...

Page 29: ...utions and requirements in the following chapters 2 General safety precautions 47 6 1 Preparing the installation site 424 6 3 3 To provide the installation structure Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise Use a vibration proof rubber field supply in cases where vibrations may be transmitted to the building The unit m...

Page 30: ...ath so that it does NOT become slippery in case of ambient freezing temperatures If you install the unit on a frame install a waterproof plate within 150 mm of the bottom side of the unit in order to prevent water from getting into the unit and to avoid drain water dripping see the following figure NOTICE In cold areas do NOT use a drain socket hose and caps large small with the outdoor unit Take ...

Page 31: ...Install a drain cap large b Drain hole Install a drain cap small c Drain hole for drain socket 6 3 6 To prevent the outdoor unit from falling over In case the unit is installed in places where strong wind can tilt the unit take following measure 1 Prepare 2 cables as indicated in the following illustration field supply 2 Place the 2 cables over the outdoor unit 3 Insert a rubber sheet between the ...

Page 32: ...t 42 7 3 Checking the refrigerant piping 42 7 3 1 About checking the refrigerant piping 42 7 3 2 Precautions when checking the refrigerant piping 43 7 3 3 To check for leaks 43 7 3 4 To perform vacuum drying 44 7 1 Preparing refrigerant piping 7 1 1 Refrigerant piping requirements INFORMATION Also read the precautions and requirements in the 2 General safety precautions 47 CAUTION Piping and joint...

Page 33: ...Piping material Phosphoric acid deoxidised seamless copper Flare connections Only use annealed material Piping temper grade and thickness Outer diameter Ø Temper grade Thickness t a 6 4 mm 1 4 9 5 mm 3 8 12 7 mm 1 2 Annealed O 0 8 mm t Ø 15 9 mm 5 8 1 mm a Depending on the applicable legislation and the maximum working pressure of the unit see PS High on the unit name plate larger piping thickness...

Page 34: ...erator for Multi see the indoor unit installation manual for the maximum allowable refrigerant piping length and height difference The shorter the refrigerant piping the better the performance of the system The piping length and height differences must comply with the following requirements Shortest allowable length per room is 3 m Outdoor unit Refrigerant piping length to each indoor unit Refrige...

Page 35: ...g out piping work without connecting the indoor unit in order to add another indoor unit later 7 2 1 About connecting the refrigerant piping Before connecting the refrigerant piping Make sure the outdoor and indoor unit are mounted Typical workflow Connecting the refrigerant piping involves Connecting the refrigerant piping to the indoor unit Connecting the refrigerant piping to the outdoor unit I...

Page 36: ...day protect the piping as described in the following table to prevent dirt liquid or dust from entering the piping Use caution when passing copper tubes through walls see figure below Unit Installation period Protection method Outdoor unit 1 month Pinch the pipe 1 month Pinch or tape the pipe Indoor unit Regardless of the period INFORMATION Do NOT open the refrigerant stop valve before checking th...

Page 37: ... 90 2 ØA Ø9 5 33 39 12 8 13 2 Ø12 7 50 60 16 2 16 6 Ø15 9 62 75 19 3 19 7 7 2 4 Pipe bending guidelines Use a pipe bender for bending All pipe bends should be as gentle as possible bending radius should be 30 40 mm or larger 7 2 5 To flare the pipe end NOTICE Incomplete flaring may cause refrigerant gas leakage Do NOT re use flares Use new flares to prevent refrigerant gas leakage Use flare nuts t...

Page 38: ...s between outdoor and indoor unit using reducers INFORMATION For the DHW generator for Multi use the same reducer as for the 20 class indoor unit For the Hybrid for Multi see the indoor unit installation manual for the capacity class and applicable reducer Total indoor unit capacity class that can be connected to this outdoor unit Outdoor unit Total indoor unit capacity class 2MXM68 10 2 kW 3MXM40...

Page 39: ...Ø12 7mm 15 20 25 35 42 a 2 4 42 50 60 4MXM80 A Ø9 5 mm 15 20 25 35 42 a B Ø12 7mm 15 20 25 35 42 a 2 4 42 50 60 C D Ø15 9 mm 15 20 25 35 42 a 5 6 42 50 60 1 3 71 5MXM90 A B Ø9 5 mm 15 20 25 35 42 a C Ø12 7mm 15 20 25 35 42 a 2 4 42 50 60 D E Ø15 9 mm 15 20 25 35 42 a 5 6 42 50 60 1 3 71 a Only in case of connection with FTXM42R 1 2 3 4 5 6 Reducer type Connection 1 Ø15 9 mm Ø12 7 mm 2 Ø12 7 mm Ø9 ...

Page 40: ...gas pipe connection port a b d e c a Outdoor unit connection port b Reducer no 2 c Reducer no 4 d Flare nut for Ø12 7 mm e Inter unit piping Coat the threaded connection port of the outdoor unit where the flare nut comes in with refrigeration oil Flare nut for mm Tightening torque N m Ø9 5 33 39 Ø12 7 50 60 Ø15 9 62 75 NOTICE Use an appropriate wrench to avoid damaging the connection thread by ove...

Page 41: ...the stem cap as this could cause a refrigerant leak a b a Spanner b Torque wrench When it is expected that the operating pressure will be low e g when cooling will be performed while the outside air temperature is low sufficiently seal the flare nut in the stop valve on the gas line with silicon sealant to prevent freezing Silicon sealant make sure there is no gap To open close the stop valve 1 Re...

Page 42: ...o the outdoor unit Piping length Keep field piping as short as possible Piping protection Protect the field piping against physical damage 1 Connect the liquid refrigerant connection from the indoor unit to the liquid stop valve of the outdoor unit b c a c a Liquid stop valve b Gas stop valve c Service port 2 Connect the gas refrigerant connection from the indoor unit to the gas stop valve of the ...

Page 43: ...igerant piping 432 NOTICE Use a 2 stage vacuum pump with a non return valve that can evacuate to a gauge pressure of 100 7 kPa 1 007 bar 5 Torr absolute Make sure the pump oil does not flow oppositely into the system while the pump is not working NOTICE Use this vacuum pump for R32 exclusively Using the same pump for other refrigerants may damage the pump and the unit NOTICE Connect the vacuum pum...

Page 44: ...e valve Hi e Charging hoses f Vacuum pump g Service port h Valve lids i Gas stop valve j Liquid stop valve 1 Vacuum the system until the pressure on the manifold indicates 0 1 MPa 1 bar 2 Leave as is for 4 5 minutes and check the pressure If the pressure Then Does not change There is no moisture in the system This procedure is finished Increases There is moisture in the system Go to the next step ...

Page 45: ...P600463 5E 2021 12 INFORMATION After opening the stop valve it is possible that the pressure in the refrigerant piping does NOT increase This might be caused by e g the closed state of the expansion valve in the outdoor unit circuit but does NOT present any problem for correct operation of the unit ...

Page 46: ... Before charging additional refrigerant make sure the outdoor unit s external refrigerant piping is checked leak test vacuum drying INFORMATION Depending on the units and or the installation conditions it might be necessary to connect electrical wiring before you can charge refrigerant Typical workflow Charging additional refrigerant typically consists of the following stages 1 Determining if and ...

Page 47: ...t is mildly flammable WARNING The appliance shall be stored so as to prevent mechanical damage and in a well ventilated room without continuously operating ignition sources e g open flames an operating gas appliance or an operating electric heater The room size shall be as specified in the General safety precaution WARNING Do NOT pierce or burn refrigerant cycle parts Do NOT use cleaning materials...

Page 48: ...uid piping 30 m 0 020 R Additional charge kg rounded in units of 0 1 kg INFORMATION Piping length is the one way length of liquid piping INFORMATION Additional refrigerant charge is NOT allowed in case of combination of the outdoor unit 3MXM40 or 3MXM52 with the indoor units CVXM A and or FVXM A The total piping length MUST be 30 m Maximum allowable refrigerant charge amount 3MXM40 3MXM52 2 2 kg 3...

Page 49: ...see 16 2 To pump down 473 for more details 8 7 To fix the fluorinated greenhouse gases label 1 Fill in the label as follows b Contains fluorinated greenhouse gases 2 1 1 1 2 2 kg tCO2 eq GWP kg 1000 kg kg GWP XXX RXXX a f c d e a If a multilingual fluorinated greenhouse gases label is delivered with the unit see accessories peel off the applicable language and stick it on top of a b Factory refrig...

Page 50: ...tions of the heat pump 2 Connecting the electrical wiring to the outdoor unit 3 Connecting the electrical wiring to the indoor unit 4 Connecting the main power supply of the indoor unit 5 Connecting the main power supply of the gas boiler 6 Connecting the communication cable between the gas boiler and the indoor unit 7 Connecting the user interface 8 Connecting the shut off valves 9 Connecting the...

Page 51: ...l shock or fire Do NOT install a phase advancing capacitor because this unit is equipped with an inverter A phase advancing capacitor will reduce performance and may cause accidents WARNING Use an all pole disconnection type breaker with at least 3 mm between the contact point gaps that provide full disconnection under overvoltage category III WARNING If the supply cord is damaged it MUST be repla...

Page 52: ...ad wire connector room A B C D E c S40 thermal overload relay lead wire and high pressure switch connector d Multimeter DC voltage range e S90 93 thermistor lead wire connector f S70 fan motor lead wire connector g S80 4 way valve lead wire connector h Compressor lead wire connector May differ depending on the model 9 1 2 Guidelines when connecting the electrical wiring Keep the following in mind ...

Page 53: ...e other wires 1 3 9 1 3 Specifications of standard wiring components Component Power supply cable Voltage 220 240 V Phase 1 Frequency 50 Hz Wire type See table below A Interconnection cable indoor outdoor 4 core cable 1 5 mm2 or 2 5 mm2 and applicable for 220 240 V H05RN F 60245 IEC 57 Recommended circuit breaker See table below B Residual current device MUST comply with applicable legislation Mod...

Page 54: ...al shock or leakage 3 Connect the wires between the indoor and outdoor units so that the terminal numbers match Make sure to match the symbols for piping and wiring 4 Make sure to connect correct wiring to correct room e B e E e C e D a A e A a C a D a E a B b c d a Terminal for room A B C D E b Circuit breaker c Residual current device d Power supply wire e Interconnection wire for room A B C D E...

Page 55: ...ectrical installation Installer reference guide 55 2MXM A 3MXM A 4MXM A 5MXM A R32 Split series 4P600463 5E 2021 12 L N 1 2 3 1 2 3 2 a a Wire retainer 10 Reattach the switch box cover and the service cover ...

Page 56: ... recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape 1 Insulate and fix the refrigerant piping and cables as follows g b a f e c d a Gas pipe b Gas pipe insulation c Interconnection cable d Field wiring if applicable e Liquid pipe f Liquid pipe insulation g Finishing tape 2 Install the service co...

Page 57: ...mode lock 59 11 1 About standby electricity saving function The standby electricity saving function turns OFF the power supply to the outdoor unit and turns ON the standby electricity saving mode on the indoor unit The standby electricity saving function works with following units 3MXM40 3MXM52 FTXM FTXP FTXJ FVXM CTXA CTXM CVXM If another indoor unit is used the connector for standby electric sav...

Page 58: ...function is set operates at high power the other indoor units will run with reduced capabilities Quiet operation priority If the indoor unit on which the priority room function is set to quiet operation the outdoor unit will also run quietly Ask the customer in which rooms he plans to use this function and make the necessary settings during installation Setting it in the guest rooms is convenient ...

Page 59: ... cover on the service PCB 2 Set the heat mode lock switch SW5 1 to ON 1 1 4 3 2 1 A 1 2 3 4 5 SW5 4 3 2 1 2 OFF ON 11 5 About cool mode lock Cool mode lock limits the unit to cool operation Forced operation remains possible in cool mode Specifications for the connector housing and pins ST products housing VHR 5N pin SVH 21T 1 1 When cool mode lock is used in combination with the Hybrid for Multi t...

Page 60: ...11 Configuration Installer reference guide 60 2MXM A 3MXM A 4MXM A 5MXM A R32 Split series 4P600463 5E 2021 12 4 VHR 5N SVH 21T 1 S15 1 3 5 ...

Page 61: ... 63 12 5 1 About wiring error check 63 12 5 2 To perform a test run 64 12 6 Starting up the outdoor unit 65 12 1 Overview Commissioning This chapter describes what you have to do and know to commission the system after it is installed Typical workflow Commissioning typically consists of the following stages 1 Checking the Checklist before commissioning 2 Performing a test run for the system 12 2 P...

Page 62: ...tions or damaged electrical components in the switch box There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units There are NO refrigerant leaks The refrigerant pipes gas and liquid are thermally insulated The correct pipe size is installed and the pipes are properly insulated The stop valves gas and liquid on the outdoor unit are fully open Drainage Make sur...

Page 63: ...iring that CANNOT be checked directly such as underground wiring This function CANNOT be used within 3 minutes after activating the safety breaker or when the outside air temperature is 5 C To perform a wiring error check INFORMATION You only have to perform a wiring error check if you are not sure that the electrical wiring and piping is connected correctly If you perform a wiring error check the...

Page 64: ...nual of the indoor unit to make sure that all functions and parts are working properly 1 In cooling mode select the lowest programmable temperature In heating mode select the highest programmable temperature 2 Measure the temperature at the indoor unit inlet and outlet after running the unit for about 20 minutes The difference should be more than 8 C cooling or 20 C heating 3 First check operation...

Page 65: ... Installer reference guide 65 2MXM A 3MXM A 4MXM A 5MXM A R32 Split series 4P600463 5E 2021 12 12 6 Starting up the outdoor unit See the indoor unit installation manual for configuration and commissioning of the system ...

Page 66: ... for the user Make sure that the user has the printed documentation and ask him her to keep it for future reference Inform the user that he can find the complete documentation at the URL mentioned earlier in this manual Explain the user how to properly operate the system and what to do in case of problems Show the user what to do for the maintenance of the unit Explain the user about energy saving...

Page 67: ...orming maintenance at least once a year However applicable legislation might require shorter maintenance intervals NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO2 equivalent Formula to calculate the quantity in CO2 equivalent tonnes GWP value of the refrigerant total refrigerant charge in kg 1000 14 ...

Page 68: ...k the following at least once a year Heat exchanger The heat exchanger of the outdoor unit can get blocked up due to dust dirt leaves etc It is recommended to clean the heat exchanger yearly A blocked heat exchanger can lead to too low pressure or too high pressure leading to worse performance 14 4 About the compressor When servicing the compressor keep in mind following precautions DANGER RISK OF...

Page 69: ...unit ALWAYS make sure that the unit is disconnected from the mains Turn off the respective circuit breaker When a safety device was activated stop the unit and find out why the safety device was activated before resetting it NEVER shunt safety devices or change their values to a value other than the factory default setting If you are unable to find the cause of the problem call your dealer DANGER ...

Page 70: ...of the piping and the drain hose is complete Improperly connected drainage Secure the drainage 15 3 4 Symptom Electrical leakage Possible causes Corrective action The unit is NOT earthed correctly Check and correct the connection of the earth wiring 15 3 5 Symptom Priority room setting does NOT function Possible causes Corrective action The priority room setting may be set for more than 1 room Onl...

Page 71: ...or worked or freeze up in operating unit or stand by unit Overload relay worked or high discharge pipe temperature b Faulty compressor start Input over current Thermistor or CT abnormality b High temperature switch box High temperature at inverter circuit heat sink Output over current b Refrigerant shortage b Low voltage to main circuit or over voltage to main circuit Reversing solenoid valve swit...

Page 72: ...series 4P600463 5E 2021 12 Green LED A Diagnosis Turn the power OFF and back ON and check the LED within approximately 3 minutes If the LED is ON again the outdoor unit PCB is faulty Power supply fault a a Diagnosis may not apply to some cases For more details refer to the service manual ...

Page 73: ...t the environment pump down when relocating the unit or when disposing of the unit DANGER RISK OF EXPLOSION Pump down Refrigerant leakage If you want to pump down the system and there is a leak in the refrigerant circuit Do NOT use the unit s automatic pump down function with which you can collect all refrigerant from the system into the outdoor unit Possible consequence Self combustion and explos...

Page 74: ...d e a Gas stop valve b Closing direction c Hexagonal wrench d Valve cap e Liquid stop valve 16 3 To start and stop forced cooling 1 Turn OFF the power remove the service cover and the switch box cover and the service PCB switch cover 2 Set DIP switch SW5 and SW6 to OFF 3 Set DIP switch SW2 to COOL 2 1 1 1 OFF ON 4 3 2 1 2 1 4 3 2 1 HEAT COOL A 1 2 3 4 5 2 3 SW6 SW2 SW5 4 Reattach the service PCB s...

Page 75: ...16 Disposal Installer reference guide 75 2MXM A 3MXM A 4MXM A 5MXM A R32 Split series 4P600463 5E 2021 12 1 4 A 1 2 3 4 5 7 SW1 6 5 8 Close switch box cover and service cover ...

Page 76: ...lied parts and numbering refer to the wiring diagram on the unit Part numbering is by Arabic numbers in ascending order for each part and is represented in the overview below by in the part code Symbol Meaning Symbol Meaning Circuit breaker Protective earth Connection Protective earth screw Connector A Rectifier Earth Relay connector Field wiring Short circuit connector Fuse Terminal INDOOR Indoor...

Page 77: ... P LED V L Pilot lamp light emitting diode HAP Light emitting diode service monitor green HIGH VOLTAGE High voltage IES Intelligent eye sensor IPM Intelligent power module K R KCR KFR KHuR K M Magnetic relay L Live L Coil L R Reactor M Stepper motor M C Compressor motor M F Fan motor M P Drain pump motor M S Swing motor MR MRCW MRM MRN Magnetic relay N Neutral n N Number of passes through ferrite ...

Page 78: ...sensor high S NPL Pressure sensor low S PH HPS Pressure switch high S PL Pressure switch low S T Thermostat S RH Humidity sensor S W SW Operation switch SA F1S Surge arrester SR WLU Signal receiver SS Selector switch SHEET METAL Terminal strip fixed plate T R Transformer TC TRC Transmitter V R V Varistor V R Diode bridge Insulated gate bipolar transistor IGBT power module WRC Wireless remote contr...

Page 79: ...6 4CuT 6 4CuT 6 4CuT 9 5CuT 9 5CuT 9 5CuT 9 5CuT 7 9CuT S1PH SV 9 5CuT 9 5CuT 6 4CuT Solenoid valve 12 7CuT 15 9CuT d e f k a b c g i d r A r B s s t t u u d p o o n l l m l w x v A v B v A v B q h 2MXM68 a Heat exchanger k 4 way valve u Thermistor gas b Outdoor air temperature thermistor l Muffler v Room c Heat exchanger thermistor m Discharge pipe thermistor w Field piping liquid d Refnet header...

Page 80: ...uT 12 7CuT 12 7CuT 12 7CuT 12 7CuT 15 9CuT 15 9CuT 15 9CuT 7 9CuT 9 5CuT 12 7CuT 7 9CuT 7 9CuT 7 9CuT MV MV MV A B C 6 4CuT 6 4CuT 6 4CuT 6 4CuT 6 4CuT 6 4CuT 9 5CuT 9 5CuT 9 5CuT 9 5CuT 7 9CuT S1PH d e f k a b c g i d v A v B v C u u u d p o o n l m l l w x v A v B v C q h 3MXM40 3MXM52 a Heat exchanger k 4 way valve u Thermistor gas b Outdoor air temperature thermistor l Muffler v Room c Heat ex...

Page 81: ...T 9 5CuT 12 7CuT 7 9CuT 7 9CuT 7 9CuT MV MV MV A B C 6 4CuT 6 4CuT 6 4CuT 9 5CuT 9 5CuT 9 5CuT 9 5CuT S1PH SV 9 5CuT 9 5CuT 6 4CuT 12 7CuT 7 9CuT MVD 6 4CuT 15 9CuT 12 7CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 9 5CuT 9 5CuT 15 9CuT 6 4CuT 6 4CuT 6 4CuT 6 4CuT d e f k a a b c g i j d s t s t s t s t v A v A v B v C v D v B v C v D u u u u d p o o n l m l l w x q h y y 4MXM...

Page 82: ...CuT 12 7CuT 15 9CuT 9 5CuT 9 5CuT 9 5CuT d e f k a a b c g i j d r A r B r C r D r E s t s t s t s t s t v A v A v B v C v D v E v B v C v D v E u u u u u d p o o n l m l l w x q h y y 5MXM90 a Heat exchanger k 4 way valve u Thermistor gas b Outdoor air temperature thermistor l Muffler v Room c Heat exchanger thermistor m Discharge pipe thermistor w Field piping liquid d Refnet header n Compressor...

Page 83: ...r application explaining how to install configure and maintain it Operation manual Instruction manual specified for a certain product or application explaining how to operate it Maintenance instructions Instruction manual specified for a certain product or application which explains if relevant how to install configure operate and or maintain the product or application Accessories Labels manuals i...

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Daikin 2MXM68A2V1B, Installer'S Reference Manual

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