Daikin RXYQQ10T7Y1B Installation And Operation Manual Download Page 9

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RXYQQ8~20T7Y1B

VRV IV System Air Conditioner

4P345099-1 – 2013.04

Installation and operation manual

See location 1 in the figure above for reference to where following
accessories are supplied with the unit.

Accessory pipes

(mm)

8 HP

10 HP

12 HP

Øa

Øb

Øa

Øb

Øa

Øb

Gas pipe

Front connection

19.1

25.4

22.2

25.4

28.6

Bottom connection

19.1

25.4

22.2

25.4

28.6

Liquid pipe

Front connection

9.52

12.7

Bottom connection

9.52

12.7

Accessory pipes

(mm)

14 HP

16 HP

18 HP

Øa

Øb

Øa

Øb

Øa

Øb

Gas pipe

Front connection

25.4

28.6

25.4

28.6

25.4

28.6

Bottom connection

25.4

28.6

25.4

28.6

25.4

28.6

Liquid pipe

Front connection

12.7

15.9

Bottom connection

12.7

15.9

ID Øa

ID Øb

ID Øa

OD Øb

ID Øb

ID Øa

ID Øb

ID Øa

ID Øb

ID Øa

OD Øb

ID Øb

ID Øa

ID Øb

ID Øa

Accessory pipes

(mm)

20 HP

Øa

Øb

Gas pipe

Front connection

25.4

28.6

Bottom connection

25.4

28.6

Liquid pipe

Front connection

12.7

15.9

Bottom connection

12.7

15.9

ID Øa

ID Øb

ID Øa

OD Øb

ID Øb

ID Øa

ID Øb

ID Øa

Summary of Contents for RXYQQ10T7Y1B

Page 1: ...INSTALLATION AND OPERATION MANUAL RXYQQ8T7Y1B RXYQQ10T7Y1B RXYQQ12T7Y1B RXYQQ14T7Y1B RXYQQ16T7Y1B RXYQQ18T7Y1B RXYQQ20T7Y1B System Air Conditioner ...

Page 2: ...PH HPS R8T 10 12HP 3 6 15 4 5 18 17 7 8 14 1 16 11 12 10 1 2 10 10 13 12 6 11 9 7 14 18 17 8 18 3 5 4 4 5 M sv sv INV INV sv M1C M2C M1F M M2F S1NPH S1NPL S1PH S2PH HPS R6T R5T R7T R1T R4T R8T 10 12HP R21T R22T R3T HPS 3 6 15 4 4 18 17 7 8 14 5 2 1 16 11 12 10 14 10 16 HPS S4PH HPS S2PH S1PH HPS S3PH HPS 1 2 3 4 ...

Page 3: ...t Certifikatet C i enlighet med den Tekniska Konstruktionsfilen D som positivt intygats av E Fastsatt modul F G Riskkategori H Se även nästa sida 12 som det fremkommer i A og gjennom positiv bedømmelse av B ifølge Sertifikat C som det fremkommer i den Tekniske Konstruksjonsfilen D og gjennom positiv bedømmelse av E Anvendt modul F G Risikokategori H Se også neste side 13 jotka on esitetty asiakirj...

Page 4: ...bar Минимално максимално допустима температура TS TSmin Минимална температура от страната на ниското налягане L C TSmax Температура на насищане съответстваща на максимално допустимото налягане PS M C Охладител N Настройка на предпазното устройство за налягане P bar Фабричен номер и година на производство вижте табелката на модела 22 Maksimalus leistinas slėgis PS K bar Minimali maksimali leistina ...

Page 5: ...d 29 13 3 Connecting the PC configurator to the outdoor unit 30 14 Charging refrigerant 30 14 1 Precautions 30 14 2 Important information regarding the refrigerant used 31 14 3 Calculating the additional refrigerant charge 31 14 4 Method for adding refrigerant 32 15 Start up and configuration 36 15 1 Checks before initial start up 36 15 2 Monitoring function and field settings 37 15 3 Energy savin...

Page 6: ...ining service In Europe EN 378 provides the necessary guidance for this logbook 3 Introduction 3 1 General information This installation manual concerns the VRV IV full inverter driven heat pump system for replacement purposes Depending on the situation the existing refrigerant piping of a previous installation or in some cases even indoor units can be reused Model line up RXYQQ8 20 single unit mo...

Page 7: ...these here below are prohibited To install the outdoor unit the following optional parts are also required 1 Refrigerant branching kit For the selection of the optimal branching kit please refer to 9 4 Selection of refrigerant branch kits on page 13 2 Outdoor unit multi connection piping kit 3 In order to control the cooling or heating operation from a central location the following option can be ...

Page 8: ... 1 in the figure below for reference to where following accessories are supplied with the unit INFORMATION Refer to the technical engineering data for the latest option names HP class of outdoor unit 50 minimum CR 100 nominal CR 130 maximum CR 8 100 200 260 10 125 250 325 12 150 300 390 14 175 350 455 16 200 400 520 18 225 450 585 20 250 500 650 22 275 550 715 24 300 600 780 26 325 650 845 28 350 ...

Page 9: ...52 9 52 9 52 12 7 Bottom connection 9 52 9 52 9 52 12 7 Accessory pipes mm 14 HP 16 HP 18 HP Øa Øb Øa Øb Øa Øb Gas pipe Front connection 25 4 28 6 25 4 28 6 25 4 28 6 Bottom connection 25 4 28 6 25 4 28 6 25 4 28 6 Liquid pipe Front connection 12 7 15 9 Bottom connection 12 7 15 9 ID Øa ID Øb ID Øa OD Øb ID Øb ID Øa ID Øb ID Øa ID Øa ID Øb ID Øa OD Øb ID Øb ID Øa ID Øb ID Øa Accessory pipes mm 20 ...

Page 10: ... main component list may not be existing in the unit Main components see figure 1 figure 2 figure 3 figure 4 1 Compressor M1C 2 Compressor M2C 3 Heat exchanger 4 Fan 5 Fan motor M1F M2F 6 Accumulator 7 Expansion valve main Y1E 8 Expansion valve subcool heat exchanger Y2E 9 Subcool heat exchanger 10 Oil separator 11 Solenoid valve oil accumulator Y2S 12 Solenoid valve oil1 Y3S 13 Solenoid valve oil...

Page 11: ...ety limits in the event of a refrigerant leak refer to 18 Caution for refrigerant leaks on page 47 1 Personal computer or radio 2 Fuse 3 Earth leakage protector 4 User interface 5 Indoor unit 6 Outdoor unit In places with weak reception keep distances of 3 m or more to avoid electromagnetic disturbance of other equipment and use conduit tubes for power and transmission lines INFORMATION For more d...

Page 12: ...tion may result in the unit turning over 6 2 Weather related precautions Select a place where the rain can be avoided as much as possible Be sure that the air inlet of the unit is not positioned towards the main wind direction Frontal wind will disturb the operation of the unit If necessary use a screen to block the wind Ensure that water cannot cause any damage to the location by adding water dra...

Page 13: ... any indicated service space dimensions 4 15x22 5 515 76 765 76 272 328 373 930 97 107 131 179 259 276 122 766 729 137 1685 mm RXYQQ8 12 4 15x22 5 97 272 328 373 1240 107 131 179 259 276 122 1685 76 137 765 76 515 729 1076 mm RXYQQ14 20 A B C D A B a 10 mm b 300 mm c 10 mm d 500 mm a 50 mm b 100 mm c 50 mm d 500 mm a 200 mm b 300 mm a 10 mm b 300 mm c 10 mm d 500 mm e 20 mm a 50 mm b 100 mm c 50 m...

Page 14: ... Unpacking Relief the unit from its packing material Take care not to damage the unit when removing the shrink foil with a cutter 1 Remove the 4 bolts fixing the unit to its pallet 2 Make sure that all accessories as mentioned in 4 1 Accessories supplied with this unit on page 4 are available in the unit 8 4 Installing the unit Make sure the unit is installed level on a sufficiently strong base to...

Page 15: ...en care of the area around the unit might be very slippery When installed in a corrosive environment use a nut with plastic washer 1 to protect the nut tightening part from rust NOTICE If the unit is operated with the transportation stay attached abnormal vibration or noise may be generated 729 929 AB AA 1 2 3 4 5 6 7 mm 20 mm 1 1 3 12 3 N m 2 1 3 12 3 N m 2 A B NOTICE The refrigerant R410A requir...

Page 16: ...e of the main pipes 1 Outdoor unit 2 Main pipes 3 Increase 4 First refrigerant branch kit 5 Indoor unit The pipe thickness of the refrigerant piping shall comply with the applicable legislation The minimal pipe thickness for R410A piping must be in accordance with the table below The refrigerant pipes and branches must meet the condition of design pressure 33 bar 3 3 MPa If it is NOT possible to c...

Page 17: ...th the number of outdoor units 9 5 System piping length limitations 9 5 1 Piping length restrictions Make sure to perform the piping installation within the range of the maximum allowable pipe length allowable level difference and allowable length after branching as indicated below Definitions Actual piping length pipe length between outdoor 1 and indoor units Equivalent piping length 2 pipe lengt...

Page 18: ...ipe size of the main pipe then the pipe size of the main pipe has to be increased as well Branch with refnet joint Branch with refnet joint and refnet header Branch with refnet header Single outdoor Example 1 1 Example 1 2 Example 1 3 Multi outdoor Example 2 1 Indoor unit Refnet joint Refnet header Outdoor multi connection piping kit Actual piping length 120 m Example 1 1 unit 8 a b c d e f g p 12...

Page 19: ...ng follow the instructions in the installation manual that comes with the kit Only proceed with piping work after considering the limitations on installing listed here and in the chapter 10 2 Connecting the refrigerant piping on page 17 always referring to the installation manual delivered with the kit 9 6 2 Possible installation patterns and configurations The piping between the outdoor units mus...

Page 20: ...sture and contamination from mixing into the system Block all gaps in the holes for passing out piping and wiring using sealing material field supply the capacity of the unit will drop and small animals may enter the machine Example passing piping out through the front Use clean pipes only Hold the pipe end downwards when removing burrs Cover the pipe end when inserting it through a wall so that n...

Page 21: ... stop valves cut off the lower part of the smaller pinched piping with an appropriate tool e g pipe cutter a pair of nippers Let the remaining oil drip out in case the recovery was not complete Wait until all oil is dripped out NOTICE Installation shall be done by an installer the choice of materials and installation shall comply with the applicable legislation In Europe EN 378 is the applicable s...

Page 22: ...joint vertically see view B 2 Make sure that the total length of the piping connected to the joint is absolute straight for more than 500 mm Only if a straight field piping of more than 120 mm is connected more than 500 mm of straight section can be ensured 3 Improper installation may lead to malfunction of the outdoor unit WARNING Never remove the pinched piping by brazing Any gas or oil remainin...

Page 23: ...Schrader type valve After handling the service port make sure to tighten the service port cover securely For the tightening torque refer to the table below Check for refrigerant leaks after tightening the service port cover 10 3 5 Tightening torques 10 4 Leak test and vacuum drying It is very important that all refrigerant piping work is done before the units outdoor or indoor are powered on When ...

Page 24: ...Leak test and vacuum drying on page 19 10 4 4 Setup 1 Pressure reducing valve 2 Nitrogen 3 Measuring instrument 4 Refrigerant R410A tank siphon system 5 Vacuum pump 6 Charge hose 7 Refrigerant charge port 8 Gas line stop valve 9 Liquid line stop valve 10 Outdoor unit 11 To indoor unit 12 Stop valve 13 Field piping 14 Gas flow 15 Stop valve service port A Valve A B Valve B C Valve C 10 4 5 Leak tes...

Page 25: ...ring work 12 1 Precautions on electrical wiring work For the existing power supply and transmission wiring check that the specifications match the requirements as described in this chapter and that other parts especially terminals do not appear to have deteriorated Implement appropriate procedures e g replacement if required NOTICE Make sure to use a recommended bubble test solution from your whol...

Page 26: ... sure to install an earth leakage protector in accordance with the applicable legislation Failure to do so may cause electric shock or fire Be sure to use a dedicated power circuit never use a power supply shared by another appliance When installing the earth leakage protector be sure that it is compatible with the inverter resistant to high frequency electric noise to avoid unnecessary opening of...

Page 27: ...urn Y3S Solenoid valve oil 1 Y4S Solenoid valve oil 2 Z1C Z7C Noise filter ferrite core Z1F Noise filter with surge absorber L1 L2 L3 Live N Neutral Field wiring Terminal strip Connector Terminal Protective earth screw BLK Black BLU Blue BRN Brown GRN Green GRY Grey ORG Orange PNK Pink RED Red WHT White YLW Yellow Connector for optional accessories X14A Connector drain pan heater X37A Connector po...

Page 28: ...r 500 m Maximum number of branches 16 Maximum number of independent interconnectable systems 10 Up to 16 branches are possible for unit to unit cabling No branching is allowed after branching see figure below 1 Outdoor unit 2 Indoor unit 3 Main line 4 Branch line 1 5 Branch line 2 6 Branch line 3 7 No branch is allowed after branch 8 Central user interface etc A Transmission wiring between outdoor...

Page 29: ... Transmission wiring 2 Fix wiring with tie wrap 3 Possible power supply wire entrance hole 6 4 Possible transmission wire entrance hole 6 5 Possible transmission wire entrance hole 6 Fix wiring to pipe insulation with tie wraps 6 Inside the electronic component box the wiring should be fixed on several locations with tie wraps to the factory mounted low voltage wiring 7 Factory mounted low voltage...

Page 30: ...le 7 5 Alternative power supply routing 12 6 3 Precautions when knocking out knockout holes To punch a knockout hole hit on it with a hammer After knocking out the holes we recommend removing any burrs and paint the edges and areas around the holes using repair paint to prevent rusting When passing electrical wiring through the knockout holes prevent damage to the wires by wrapping the wiring with...

Page 31: ...r the indoor units is connected 12 7 2 Connection of wiring to terminals Transmission wiring in outdoor unit 1 Fix to the indicated plastic brackets using field supplied clamping material 2 Wiring between the units indoor outdoor F1 F2 left 3 Internal transmission wiring Q1 Q2 4 Plastic bracket 5 Field supplied clamps Care should be taken for connecting the wires to the terminal block See the tabl...

Page 32: ...rical component box service cover Operate the switches and push buttons with an insulated stick such as a closed ball point pen to avoid touching of live parts Make sure to re attach the inspection cover into the electronic component box cover and to close the front plate s inspection cover after the job is finished During operation of the unit the front plate of the unit should be attached Settin...

Page 33: ...cordingly The communication wiring should be checked at first Accessing modes BS1 is used to change the mode you want to access Access mode 1 Push BS1 one time Segment indication changes to Access mode 2 Push BS1 for at least 5 seconds Segment indication changes to Mode 1 Mode 1 is used to set basic settings and to monitor the status of the unit 15 2 Monitoring function and field settings on page ...

Page 34: ...n by pushing BS3 To leave the monitoring function push BS1 2 times you will return to the default situation when shipped from factory 13 2 2 Operating the DIP switches By operating the DIP switches it is possible to 13 3 Connecting the PC configurator to the outdoor unit Connection of the optional PC configurator cable to the outdoor unit has to be done on A1P Connect the EKPCCAB cable to the 5 pi...

Page 35: ... piping please take into account following table concerning the weight factor to be allocated It should be substituted in the formula for R When selecting indoor unit following table with connection ratio CR limitation has to be respected 50 CR 130 More detailed information can be found in technical engineering data INFORMATION National implementation of EU regulation on certain fluorinated greenh...

Page 36: ...e 14 3 Calculating the additional refrigerant charge on page 31 Refrigerant overcharge happened Recover refrigerant to reach R Q Go to step 4a Step 2 3 Open valve C to field piping via liquid stop valve Execute pre charging amount Q kg Close valve C if no additional refrigerant can be charged Step 4a Close valve C Charging is finished Fill in the amount on the additional refrigerant charge label G...

Page 37: ...atically PE charging nearly finished P9 charging finished OR P kg was added during autocharge R Q P Close valve A Push BS1 to leave program Charging is finished Fill in the amount on the additional refrigerant charge label Go to test run see 15 4 Test operation on page 43 Push BS2 TA check will be performed t0X will appear Push BS1 Charging is finished Fill in the amount on the additional refriger...

Page 38: ... b If the total amount of refrigerant could not be charged by pre charging then close valve C and go to step 5 Follow step 6 depending on the chosen charging method 5 After pre charging perform the refrigerant charge operation as shown below and charge the remaining refrigerant of the additional charging amount through valve A Open the liquid and gas side stop valves Valves A B and C must remain c...

Page 39: ...rating close valve A immediately and check whether the segment indication user interface of indoor unit shows P9 This indicates the automatic charging in cooling program was finished successfully If during the cooling operation for the automatic refrigerant charge the ambient conditions go beyond the allowable for this operation mode the unit will indicate on the segment display the de E 2 in case...

Page 40: ...nel The voltage must correspond to the voltage on the identification label of the unit 4 Earth wiring Be sure that the earth wires have been connected properly and that the earth terminals are tightened 5 Insulation test of the main power circuit Using a megatester for 500 V check that the insulation resistance of 2 MΩ or more is attained by applying a voltage of 500 V DC between power terminals a...

Page 41: ...ames The second method is to enable low noise operation based on an external input For this operation an optional accessory is required 1 2 shows the status of power consumption limitation operation 1 unit is currently operating under power consumption limitation 0 unit is currently not operating under power consumption limitation Power consumption limitation reduces the power consumption of the u...

Page 42: ...n limitation via external control adaptor DTA104A61 62 If the system needs to be running under low noise operation or under power consumption limitation conditions when an external signal is sent to the unit this setting should be changed This setting will only be effective when the optional external control adaptor DTA104A61 62 is installed Default value 0 To activate this function change 2 12 1 ...

Page 43: ...ia the external control adaptor DTA104A61 62 If the system needs to be running under power consumption limitation conditions when an external signal is sent to the unit this setting defines the level power consumption limitation that will be applied for step2 The level is according to the table Default value 1 Change 2 31 1 2 or 3 in function of required limitation 2 32 Forced all time power consu...

Page 44: ...he customer The selection method of indoor units is important and has to be considered as the available capacity is not the same as under basic operation For details concerning to Hi sensible applications please contact your dealer To activate this setting under cooling operation change field setting 2 8 to the appropriate value matching the requirements of the pre designed system containing a hig...

Page 45: ...chieve the required room temperature very fast The overshoot is not allowed from the start up moment The start up occurs under the condition which is defined by the operation mode above In case of cooling operation the evaporating temperature is allowed to go down to 6 C on temporary base depending on the situation In case of heating operation the condense temperature is allowed to go up to 46 C o...

Page 46: ...m temperature evolution A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful Example Automatic mode during heating A Virtual load curve default automatic mode peak capacity B Load curve C Virtual target value initial condensation temperature value automatic mode D Design temperature E Load factor F Outside air temperature Tc Condensing temperature Quick Powerf...

Page 47: ...switches on the logic board on page 29 Push BS2 for 5 seconds or more The unit will start test operation The test operation is automatically carried out the outdoor unit display will indicate t01 and the indication Test operation and Under centralized control will display on the user interface of indoor units Steps during the automatic system test run procedure t01 control before start up pressure...

Page 48: ...id stop valve 18 Refrigerant overcharge Stop valve closed Check refrigerant amount recharge unit Open stop valves E4 01 02 03 Low pressure malfunction Stop valve closed Refrigerant shortage Indoor unit malfunction Open stop valves Check refrigerant amount recharge unit Check the user interface s display or Transmission wiring between the outdoor unit and the indoor unit E9 01 05 08 Electronic expa...

Page 49: ... 26 29 INV2 power phase loss Check if power supply is within range U3 03 Malfunction code System test run not yet executed system operation not possible Execute system test run U4 01 Faulty wiring to Q1 Q2 or indoor outdoor Check Q1 Q2 wiring 03 Faulty wiring to Q1 Q2 or indoor outdoor Check Q1 Q2 wiring 04 System test run abnormal ending Execute test run again U7 01 Warning faulty wiring to Q1 Q2...

Page 50: ...NGER Electrical shock See 2 General safety precautions on page 2 CAUTION When performing service to inverter equipment 1 Do not open the electrical component box cover for 10 minutes after the power supply is turned off 2 Measure the voltage between terminals on the terminal block for power supply with a tester and confirm that the power supply is shut off In addition measure points as shown in th...

Page 51: ...al applicable regulations and standards for the maximum allowable concentration level is required According to the appropriate European Standard the maximum allowed concentration level of refrigerant to a humanly space for R410A is limited to 0 44 kg m3 1 Direction of the refrigerant flow 2 Room where refrigerant leak has occurred outflow of all the refrigerant from the system Pay special attentio...

Page 52: ...ety devices High pressure switch Fan driver overload protector Inverter overload protector PC board fuse a Nominal cooling capacities are based on indoor temperature 27 C DB and 19 C WB outdoor temperature 35 C DB equivalent refrigerant piping 5 m level difference 0 m b Nominal cooling capacities are based on indoor temperature 20 C DB outdoor temperature 7 C DB and 6 C WB equivalent refrigerant p...

Page 53: ... fault circuit interrupter earth leakage circuit breaker A 20 25 32 Total overcurrent amps TOCA e e TOCA means the total value of each OC set A 17 3 24 6 35 4 Full load amps FLA f f FLA nominal running current fan Voltage range units are suitable for use on electrical systems where voltage supplied to unit terminal is not below or above listed range limits Maximum allowable voltage range variation...

Page 54: ...ecified for a certain product or application which explains if relevant how to install configure operate and or maintain the product or application Dealer Sales distributor for products as per the subject of this manual Installer Technical skilled person who is qualified to install products as per the subject of this manual User Person who is owner of the product and or operates the product Servic...

Page 55: ...electric shock and fire Do not insert fingers rods or other objects into the air inlet or outlet When the fan is rotating at high speed it will cause injury Never let the indoor unit or the user interface get wet It may cause an electric shock or a fire Never use a flammable spray such as hair spray lacquer or paint near the unit It may cause a fire Never touch the air outlet or the horizontal bla...

Page 56: ...blems may happen For checking and adjusting the internal parts contact your dealer Do not touch the heat exchanger fins These fins are sharp and could result in cutting injuries NOTICE Never put any objects into the air inlet or outlet Objects touching the fan at high operating speed can be dangerous Never press the button of the user interface with a hard pointed object The user interface may be ...

Page 57: ...operation operation will restart automatically after the power turns back on again 6 1 Cooling heating fan only and automatic operation Changeover cannot be made with a user interface whose display shows change over under centralized control refer to installation and operation manual of the user interface When the display change over under centralized control flashes refer to 6 4 Setting the maste...

Page 58: ... starts operating 3 Press the air flow direction adjust button only for Double flow Multi flow Corner Ceiling suspended and Wall mounted Refer to 6 3 Adjusting the air flow direction on page 54 for details Stopping the system 4 Press the ON OFF button of the user interface once again The operation lamp goes out and the system stops operating 6 2 2 For systems with cool heat changeover remote contr...

Page 59: ...g a room during cooling operation by using curtains or blinds Ventilate often Extended use requires special attention to ventilation Keep doors and windows closed If the doors and windows remain open air will flow out of your room causing a decrease in the cooling or heating effect Be careful not to cool or heat too much To save energy keep the temperature setting at a moderate level Never place o...

Page 60: ...ears 8 2 Maintenance before a long stop period e g at the end of the season Let the indoor units run in fan only operation for about half a day in order to dry the interior of the units Refer to 6 1 Cooling heating fan only and automatic operation on page 53 for details on fan only operation Turn off the power The user interface display disappears Clean air filters and casings of indoor units 8 Re...

Page 61: ...heard immediately after the power supply is turned on The electronic expansion valve inside an indoor unit starts working and makes the noise Its volume will reduce in about one minute A continuous low shah sound is heard when the system is in cooling operation or at a stop When the drain pump optional accessories is in operation this noise is heard A pishi pishi squeaking sound is heard when the ...

Page 62: ... After sales service and warranty 11 1 Warranty period This product includes a warranty card that was filled in by the dealer at the time of installation The completed card has to be checked by the customer and stored carefully If repairs to the air conditioner are necessary within the warranty period contact your dealer and keep the warranty card at hand 11 2 After sales service 11 2 1 Recommenda...

Page 63: ...omponents Refer to your maintenance and inspection contract for more details Table 2 Replacement Cycle list indicates recommended intervals of replacement cycles However in order to keep the unit operational as long as possible maintenance work may be required sooner Recommended intervals can be used for appropriate maintenance design in terms of budgeting maintenance and inspection fees Contact y...

Page 64: ...ermistor malfunction P8 Autocharge operation related P9 Autocharge operation related PE Autocharge operation related PJ Capacity setting malfunction outdoor U0 Abnormal low pressure drop faulty expansion valve U1 Reversed power supply phase malfunction U2 INV voltage power shortage U3 System test run not yet executed U4 Faulty wiring indoor outdoor U5 Abnormal user interface indoor communication U...

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