Daikin VRV IV RDXYQ5T8V1B Series Installer And User Manual Download

Page: 128 / 140

Troubleshooting

Installer and user reference guide

128

R R8T7V1B

VRV IV heat pump for indoor installation

4P499898-1B – 2021.12

Main code

Sub code

Cause

Solution

Low pressure malfunction:

▪

Stop valve closed

▪

Refrigerant shortage

▪

Indoor unit malfunction

▪

Open stop valves.

▪

Check refrigerant recharge
unit.

▪

Check the user interface's display or
transmission wiring between the
outdoor unit and the indoor unit.

Electronic expansion valve malfunction
(subcool)

Compressor unit: (Y1E) - A1P (X21A)

Check connection on PCB or actuator.

Electronic expansion valve malfunction
(main)

Heat exchanger unit: (Y1E) - A1P (X7A)

Check connection on PCB or actuator.

Discharge temperature too high:

▪

Stop valve closed

▪

Refrigerant shortage

Compressor unit: (R21T) - A1P (X29A)

▪

Open stop valves.

▪

Check refrigerant recharge
unit.

▪

Refrigerant overcharge

▪

Stop valve closed

▪

Check refrigerant recharge
unit.

▪

Open stop valves.

Ambient temperature sensor
malfunction

Heat exchanger unit: (R1T) - A1P (X16A)

Check connection on PCB or actuator.

Discharge temperature sensor
malfunction

Compressor unit: (R21T): open circuit -
A1P (X29A)

Check connection on PCB or actuator.

Discharge temperature sensor
malfunction

Compressor unit: (R21T): short circuit -
A1P (X29A)

Check connection on PCB or actuator.

Heat exchanger gas sensor malfunction

Heat exchanger unit: (R2T) - A1P (X18A)

Check connection on PCB or actuator.

Suction temperature sensor
malfunction

Compressor unit: (R3T) - A1P (X30A)

Check connection on PCB or actuator.

Suction temperature sensor
malfunction

Compressor unit: (R7T) - A1P (X30A)

Check connection on PCB or actuator.

De-icing temperature sensor
malfunction

Heat exchanger unit: (R3T) - A1P (X17A)

Check connection on PCB or actuator

Summary of Contents for VRV IV RDXYQ5T8V1B Series

Page 1: ...Installer and user reference guide VRV IV heat pump for indoor installation RKXYQ5T8Y1B RDXYQ5T8V1B RKXYQ8T7Y1B RDXYQ8T7V1B ...

Page 2: ...HOUT cool heat changeover remote control switch 29 7 4 3 To use the dry program WITH cool heat changeover remote control switch 29 7 5 Adjusting the air flow direction 30 7 5 1 About the air flow flap 30 7 6 Setting the master user interface 31 7 6 1 About setting the master user interface 31 7 6 2 To designate the master user interface VRV DX 31 8 Energy saving and optimum operation 32 8 1 Availa...

Page 3: ...changer unit 51 13 3 3 To remove the accessories from the heat exchanger unit 52 13 3 4 To remove the transportation sheet 52 14 About the units and options 53 14 1 Overview About the units and options 53 14 2 Identification 53 14 2 1 Identification label Compressor unit 53 14 2 2 Identification label Heat exchanger unit 54 14 3 About the compressor unit and heat exchanger unit 54 14 4 System layo...

Page 4: ... 1 5 Safety device requirements 92 17 2 To connect the electrical wiring on the compressor unit 93 17 3 To connect the electrical wiring on the heat exchanger unit 96 17 4 To close the compressor unit 97 17 5 To close the heat exchanger unit 97 17 6 To check the insulation resistance of the compressor 98 18 Configuration 99 18 1 Overview Configuration 99 18 2 Making field settings 99 18 2 1 About ...

Page 5: ...98 1B 2021 12 22 2 Precautions when troubleshooting 124 22 3 Solving problems based on error codes 124 22 3 1 Error codes Overview 125 23 Disposal 131 24 Technical data 132 24 1 Piping diagram Compressor unit and heat exchanger unit 132 24 2 Wiring diagram Compressor unit 134 24 3 Wiring diagram Heat exchanger unit 137 25 Glossary 139 ...

Page 6: ...tion and operation manual Installation and operation instructions Format Paper in the accessory bag of the compressor unit Heat exchanger unit installation manual Installation instructions Format Paper in the accessory bag of the heat exchanger unit Installer and user reference guide Preparation of the installation reference data Detailed step by step instructions and background information for ba...

Page 7: ...at 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 unit Symbol Explanation Before installation read the installation and operation manual and the ...

Page 8: ...r and user reference guide 8 RKXYQ5T8 8T7Y1B RDXYQ5T8 8T7V1B VRV IV heat pump for indoor installation 4P499898 1B 2021 12 Symbol Explanation Indicates a table title or a reference to it Example 1 3 Table title means Table 3 in chapter 1 ...

Page 9: ...rigerant WARNING Improper installation or attachment of equipment or accessories could result in electrical shock short circuit leaks fire or other damage to the equipment ONLY use accessories optional equipment and spare parts made or approved by Daikin WARNING Make sure installation testing and applied materials comply with applicable legislation on top of the instructions described in the Daiki...

Page 10: ...nd vibration of the unit Make sure the area is well ventilated Do NOT block any ventilation openings Make sure the unit is level Do NOT install the unit in the following places In potentially explosive atmospheres In places where there is machinery that emits electromagnetic waves Electromagnetic waves may disturb the control system and cause malfunction of the equipment In places where there is a...

Page 11: ...frigerant Do NOT release them directly into the environment Use a vacuum pump to evacuate the installation NOTICE After all the piping has been connected make sure there is no gas leak Use nitrogen to perform a gas leak detection NOTICE To avoid compressor breakdown do NOT charge more than the specified amount of refrigerant When the refrigerant system is to be opened refrigerant MUST be treated a...

Page 12: ...onal refrigerant Possible consequence Incorrect refrigerant amount 2 1 4 Electrical DANGER RISK OF ELECTROCUTION Turn OFF all power supply before removing the switch box cover connecting electrical wiring or touching electrical parts Disconnect the power supply for more than 10 minutes and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing The...

Page 13: ...ry 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 carrying cables first before separating the earth connection The length of the conductors between the power supply stress relief and the terminal block itself MUST be as such that t...

Page 14: ...cal 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 is operating attach a reversed phase protection circuit locally Ru...

Page 15: ...unit unattended when the service cover is removed DANGER RISK OF BURNING SCALDING DANGER RISK OF ELECTROCUTION WARNING Take sufficient precautions in case of refrigerant leakage If refrigerant gas leaks ventilate the area immediately Possible risks Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency Toxic gas might be produced if refrigerant gas comes into contact w...

Page 16: ...hing 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 wires extension cords or connect...

Page 17: ...een the power supply stress relief and the terminal block itself MUST be as such that the current carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief CAUTION Do NOT perform the test operation while working on the indoor units When performing the test operation NOT ONLY the outdoor unit but the connected indoor unit will operate as we...

Page 18: ...For the user Installer and user reference guide 18 RKXYQ5T8 8T7Y1B RDXYQ5T8 8T7V1B VRV IV heat pump for indoor installation 4P499898 1B 2021 12 For the user ...

Page 19: ...ren aged from 8 years and above and persons with reduced physical sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved Children SHALL NOT play with the appliance Cleaning and user maintenance SHALL NOT be made by children without supervision WARNING To ...

Page 20: ...e following symbol This means that the batteries may NOT be mixed with unsorted household waste If a chemical symbol is printed beneath the symbol this chemical symbol means that the battery contains a heavy metal above a certain concentration Possible chemical symbols are Pb lead 0 004 Waste batteries MUST be treated at a specialised treatment facility for reuse By ensuring waste batteries are di...

Page 21: ...ing flap is in operation Fingers may become caught or the unit may break down CAUTION Do NOT insert fingers rods or other objects into the air inlet or outlet Do NOT remove the fan guard When the fan is rotating at high speed it will cause injury CAUTION Pay attention to the fan It is dangerous to inspect the unit while the fan is running Make sure to turn OFF the main switch before executing any ...

Page 22: ...S have qualified service personnel confirm that the point of leakage has been repaired or corrected before resuming operation WARNING Stop operation and shut OFF the power if anything unusual occurs burning smells etc Leaving the unit running under such circumstances may cause breakage electrical shock or fire Contact your dealer WARNING The refrigerant in the system is safe and normally does NOT ...

Page 23: ...austive list depending on compressor unit model heat exchanger unit model and indoor unit model combinations VRV direct expansion DX indoor units air to air applications AHU air to air applications EKEXV kit EKEQM box required depending on the application Comfort air curtain air to air applications CYV Biddle series Airhandling unit connection in pair to VRV IV heat pump for indoor installation is...

Page 24: ...nel Some parts inside are dangerous to touch and appliance problems may happen For checking and adjusting the internal parts contact your dealer This operation manual offers a non exhaustive overview of the main functions of the system Detailed information on required actions to achieve certain functions can be found in the dedicated installation and operation manual of the indoor unit Refer to th...

Page 25: ... 6 Setting the master user interface 31 7 6 1 About setting the master user interface 31 7 6 2 To designate the master user interface VRV DX 31 7 1 Before operation WARNING This unit contains electrical and hot parts WARNING Before operating the unit be sure the installation has been carried out correctly by an installer CAUTION NEVER touch the internal parts of the controller Do NOT remove the fr...

Page 26: ...ng temperature and humidity ranges for safe and effective operation Specification 5 HP 8 HP Maximum capacity Heating 16 0 kW 25 0 kW Cooling 14 0 kW 22 4 kW Outside ambient design temperature Heating 20 15 5 C WB Cooling 5 46 C DB Ambient design temperature of compressor unit and heat exchanger unit 5 35 C DB Maximum relative humidity around the compressor unit and heat exchanger unit Heating 50 a...

Page 27: ...t operation the heating capacity on the indoor unit side will temporarily drop until defrosting is completed After defrosting the unit will regain its full heating capacity The indoor unit will stop fan operation the refrigerant cycle will reverse and energy from inside the building will be used to defrost the heat exchanger unit coil The indoor unit will indicate defrost operation on the display ...

Page 28: ...AN ONLY AIR CONDITIONING SELECTOR SWITCH Set the switch to for fan only operation or to for heating or cooling operation b COOL HEAT CHANGEOVER SWITCH Set the switch to for cooling or to for heating Note In case a cool heat changeover remote control switch is used the position of DIP switch 1 DS1 1 on the main PCB needs to be switched to the ON position To start 1 Select operation mode with the co...

Page 29: ...ress the operation mode selector button on the user interface several times and select program dry operation 2 Press the ON OFF button of the user interface Result The operation lamp lights up and the system starts operating 3 Press the air flow direction adjust button only for double flow multi flow corner ceiling suspended and wall mounted Refer to 7 5 Adjusting the air flow direction 430 for de...

Page 30: ...al of the user interface 7 5 1 About the air flow flap Double flow multi flow units Corner units Ceiling suspended units Wall mounted units For the following conditions a micro computer controls the air flow direction which may be different from the display Cooling Heating When the room temperature is lower than the set temperature When starting operation When the room temperature is higher than t...

Page 31: ...AHU Air handling unit When the system is installed as shown in the figure above it is necessary to designate one of the user interfaces as the master user interface The displays of slave user interfaces show change over under centralised control and slave user interfaces automatically follow the operation mode directed by the master user interface Only the master user interface can select heating ...

Page 32: ...er to Maintenance in the indoor unit manual When the display shows time to clean the air filter ask a qualified service person to clean the filters Refer to Maintenance in the indoor unit manual Keep the compressor unit heat exchanger unit indoor unit and user interface at least 1 m away from televisions radios stereos and other similar equipment Failing to do so may cause static or distorted pict...

Page 33: ...ly reducing the delivered capacity and increasing the system s efficiency Hi sensible economic cooling heating The refrigerant temperature is set higher lower cooling heating compared to basic operation The focus under high sensible mode is comfort feeling for the customer The selection method of indoor units is important and has to be considered as the available capacity is not the same as under ...

Page 34: ...nt squeeze it well and wipe the panel clean Wipe it with another dry cloth In this chapter 9 1 Maintenance after a long stop period 34 9 2 Maintenance before a long stop period 35 9 3 About the refrigerant 35 9 4 After sales service and warranty 35 9 4 1 Warranty period 35 9 4 2 Recommended maintenance and inspection 36 9 4 3 Recommended maintenance and inspection cycles 36 9 4 4 Shortened mainten...

Page 35: ...s into the atmosphere Refrigerant type R410A Global warming potential GWP value 2087 5 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 Please contact your installer f...

Page 36: ...as incorrect dismantling or installation may cause an electrical shock or fire Contact your dealer In case of accidental refrigerant leaks make sure there are no naked flames The refrigerant itself is entirely safe non toxic and non combustible but it will generate toxic gas when it accidentally leaks into a room where combustion air from fan heaters gas cookers etc is present ALWAYS have qualifie...

Page 37: ...e distortion etc the unit cannot be used if power fluctuation is outside the allowable range Bumps and vibrations are frequent Dust salt harmful gas or oil mist such as sulphurous acid and hydrogen sulfide may be present in the air The machine is started and stopped frequently or operation time is long sites with 24 hour air conditioning Recommended replacement cycle of wear parts Component Inspec...

Page 38: ...t number the operation lamp flashes and the malfunction code appears Notify your installer and report the malfunction code If the system does NOT operate properly except for the above mentioned cases and none of the above mentioned malfunctions is evident investigate the system in accordance with the following procedures Malfunction Measure If the system does not operate at all Check if there is n...

Page 39: ...ing do not work 42 10 2 4 Symptom The fan speed does not correspond to the setting 42 10 2 5 Symptom The fan direction does not correspond to the setting 42 10 2 6 Symptom White mist comes out of a unit Indoor unit 42 10 2 7 Symptom White mist comes out of a unit Indoor unit heat exchanger unit 43 10 2 8 Symptom The user interface reads U4 or U5 and stops but then restarts after a few minutes 43 1...

Page 40: ...nt detector or floor temperature sensor malfunction indoor User interface thermistor malfunction indoor Fan or drain pump malfunction heat exchanger unit PCB malfunction compressor unit Current leakage detector was activated compressor unit High pressure switch was activated Low pressure malfunction compressor unit Compressor lock detection compressor unit Electronic expansion valve malfunction co...

Page 41: ...n thermistor malfunction Heat exchanger unit capacity setting malfunction Abnormal low pressure drop faulty expansion valve Reversed power supply phase malfunction INV voltage power shortage System test run not yet executed Faulty wiring indoor heat exchanger unit compressor unit Abnormal user interface indoor communication Abnormal main sub user interface communication System mismatch Wrong type ...

Page 42: ...alled 10 2 3 Symptom Fan operation is possible but cooling and heating do not work Immediately after the power is turned on The micro computer is getting ready to operate and is performing a communication check with all indoor units Please wait 12 minutes maximally until this process is finished 10 2 4 Symptom The fan speed does not correspond to the setting The fan speed does not change even if t...

Page 43: ...A pishi pishi squeaking sound is heard when the system stops after heating operation Expansion and contraction of plastic parts caused by temperature change make this noise A low sah choro choro sound is heard while the indoor unit is stopped When another indoor unit is in operation this noise is heard In order to prevent oil and refrigerant from remaining in the system a small amount of refrigera...

Page 44: ... normal condition This continues for 1 minute 10 2 16 Symptom The compressor in the compressor unit does not stop after a short heating operation This is to prevent refrigerant from remaining in the compressor The unit will stop after 5 to 10 minutes 10 2 17 Symptom The inside of an compressor unit is warm even when the unit has stopped This is because the crankcase heater is warming the compresso...

Page 45: ... reference guide 45 RKXYQ5T8 8T7Y1B RDXYQ5T8 8T7V1B VRV IV heat pump for indoor installation 4P499898 1B 2021 12 11 Relocation Contact your dealer for removing and reinstalling the total unit Moving units requires technical expertise ...

Page 46: ...2 Disposal This unit uses hydrofluorocarbon Contact your dealer when discarding this unit NOTICE Do NOT try to dismantle the system yourself dismantling of the system treatment of the refrigerant oil and other parts MUST comply with applicable legislation Units MUST be treated at a specialised treatment facility for reuse recycling and recovery ...

Page 47: ...For the installer Installer and user reference guide 47 RKXYQ5T8 8T7Y1B RDXYQ5T8 8T7V1B VRV IV heat pump for indoor installation 4P499898 1B 2021 12 For the installer ...

Page 48: ...n sheet 52 13 1 Overview About the box This chapter describes what you have to do after the boxes with the compressor unit and the heat exchanger unit are delivered on site Removing the transportation stay only for RKXYQ5 Removing the transportation EPS only for RKXYQ8 Removing the transportation sheet from the heat exchanger unit Keep the following in mind At delivery the unit MUST be checked for...

Page 49: ...ral safety precautions b Compressor unit installation and operation manual c Fluorinated greenhouse gases label d Multilingual fluorinated greenhouse gases label e Screw only needed in case 5 HP for shield of transmission wiring see 17 2 To connect the electrical wiring on the compressor unit 493 f Cable tie 2 Remove the service cover See 15 2 2 To open the compressor unit 463 3 Remove the accesso...

Page 50: ... d Liquid Ø9 5 mm Ø9 5 mm e Piping adapter Ø19 1 22 2 mm that you need when connecting piping to the heat exchanger unit only for 8 HP 13 2 4 To remove the transportation stay Only for RKXYQ5 NOTICE If the unit is operated with the transportation stay attached abnormal vibration or noise may be generated 3 1 10 1 N m 2 a b 13 2 5 To remove the transportation EPS Only for RKXYQ8 1 Remove the EPS Th...

Page 51: ...nit 1 2 13 3 2 To handle the heat exchanger unit NOTICE When removing the heat exchanger unit from the pallet do NOT place the suction or discharge side of the unit on the floor Possible consequence Deformation of the suction or discharge opening CAUTION To avoid injury do NOT touch the air inlet or aluminium fins of the unit With packing Use a forklift or slings Without packing Carry the unit slo...

Page 52: ...heat exchanger unit 1 1 1 1 1 3 1 b c d a e f g a Optional filter for debris b Heat exchanger unit installation manual c Sealing pad d Drain hose e Metal clamp f Screw for shield of transmission wiring see 17 3 To connect the electrical wiring on the heat exchanger unit 496 g Cable tie 13 3 4 To remove the transportation sheet 1 Remove the sheet The sheet protects the unit during transport ...

Page 53: ...ions of indoor units 56 14 5 3 Possible options for the compressor unit and heat exchanger unit 56 14 1 Overview About the units and options This chapter contains information about Identification of the compressor unit and heat exchanger unit Where the compressor unit and heat exchanger unit fit in the system layout With which indoor units and options you can combine the compressor unit and heat e...

Page 54: ...ation Model identification Example R D X Y Q 5 T8 V1 B Code Explanation R Outdoor air cooled D Heat exchanger unit X Heat pump no continuous heating Y Single module Q Refrigerant R410A 5 8 Capacity class T VRV IV series V1 Power supply B European market Minor model change indication 14 3 About the compressor unit and heat exchanger unit This installation manual concerns the full inverter driven VR...

Page 55: ...he humidity is beyond these conditions safety devices may be put in action and the air conditioner may not operate 14 4 System layout NOTICE Design of the system must not be done at temperatures below 15 C INFORMATION Not all combinations of indoor units are allowed for guidance see 14 5 2 Possible combinations of indoor units 456 d d c c a b VRV DX VRV DX VRV DX EKEXV AHU d d 1 2 1 In case of VRV...

Page 56: ...door units can be connected to a VRV IV heat pump for indoor installation The list is non exhaustive and is depending on the combination of compressor unit heat exchanger unit and indoor unit models VRV direct expansion DX indoor units air to air applications AHU air to air applications EKEXV kit EKEQM box required depending on the application Comfort air curtain air to air applications CYV Biddle...

Page 57: ... through a personal computer interface For this option EKPCCAB is required which is a dedicated cable to communicate with the compressor unit The user interface software is available on http www daikineurope com support and manuals software downloads Cool heat selector In order to control the cooling or heating operation from a central location the following option can be connected Description 5 H...

Page 58: ... B C A B C X1M 7 Fix the cables with cable ties 8 Turn ON the DIP switch DS1 1 1 2 3 4 OFF X66A ON DS1 A1P 9 Reattach the service covers See 17 4 To close the compressor unit 497 10 Perform a test run See the Commissioning chapter Drain pan heater EKDPH1RDX When Installation is optional It is recommended in areas where the outside temperature is below 7 C for more than 24 hours continuously Where ...

Page 59: ...en Installation is optional It is recommended in places where a lot of debris or dirt example leafs can go into the suction ducting Where Install the filter in one of the following places Suction opening of the heat exchanger unit Suction ducting easier for maintenance How See the installation instructions attached to the filter Pressure drop over the filter 5 HP 30 Pa at 60 m min 8 HP 75 Pa at 10...

Page 60: ... grinding works where a lot of dust is created the unit MUST be covered 15 1 1 Installation site requirements of the compressor unit INFORMATION Also read the following requirements General installation site requirements See the General safety precautions chapter Refrigerant piping requirements length height difference See further in this Preparation chapter CAUTION Appliance NOT accessible to the...

Page 61: ...tion space and surroundings Choose a location where the operation noise or the hot cold air discharged from the unit will not disturb anyone Do NOT install the unit in the following places Sound sensitive areas e g near a bedroom so that the operation noise will cause no trouble Note If the sound is measured under actual installation conditions the measured value might be higher than the sound pre...

Page 62: ...n play Service space Mind the following requirements 10 50 a b 100 500 100 mm a Air suction side b Air discharge side Protective guards Make sure to install protective guards on the suction and discharge side to prevent somebody from touching the fan blades or heat exchanger Air flow Make sure nothing blocks the air flow Drainage Make sure condensation water can be evacuated properly Seaside insta...

Page 63: ...en connecting the electrical wiring When maintaining or servicing the unit DANGER RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed 15 2 2 To open the compressor unit DANGER RISK OF BURNING SCALDING DANGER RISK OF ELECTROCUTION 1 Remove the service cover of the compressor unit 5 5 5 HP 8 HP 2 If you want to make field settings remove the inspection cover 5 HP...

Page 64: ...2 Guidelines when installing the compressor unit Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise If the vibration might be transmitted to the building use a vibration proof rubber field supply You can install the compressor unit directly on the floor or on a structure On the floor You do NOT have to fix the unit with anchor b...

Page 65: ...ptional equipment When installing optional equipment also read the installation manual of the optional equipment Depending on the field conditions it might be easier to install the optional equipment first Suspension bolts Use suspension bolts for installation Check whether the ceiling is strong enough to support the weight of the unit If there is a risk reinforce the ceiling before installing the...

Page 66: ...6 3 3 Checking refrigerant piping Setup 79 16 3 4 To perform a leak test 80 16 3 5 To perform vacuum drying 81 16 3 6 To insulate the refrigerant piping 81 16 4 Charging refrigerant 82 16 4 1 About charging refrigerant 82 16 4 2 Precautions when charging refrigerant 83 16 4 3 To determine the additional refrigerant amount 83 16 4 4 To charge refrigerant 84 16 4 5 Error codes when charging refriger...

Page 67: ...g the following tables and reference figure only for indication A a B D D C D D b EKEXV AHU VRV DX VRV DX c c a Heat exchanger unit b Compressor unit c Refrigerant branch kit VRV DX VRV DX indoor unit EKEXV Expansion valve kit AHU Air handling unit A Piping between heat exchanger unit and compressor unit B Piping between compressor unit and first refrigerant branch kit main pipe C Piping between r...

Page 68: ... If the recommended gas pipe size up is not available you must use the standard size which might result in a small capacity decrease 8 HP You must increase the size size up of the main liquid pipe between compressor unit and first refrigerant branch kit It is recommended to increase the size size up of the main gas pipe between compressor unit and first refrigerant branch kit If the recommended ga...

Page 69: ...kit 5 HP KHRQ22M20TA 8 HP KHRQ22M29T9 Refnet joints at other branches For refnet joints other than the first branch select the proper branch kit model based on the total capacity index of all indoor units connected after the refrigerant branch Example Refnet joint c C D D Indoor unit capacity index Refrigerant branch kit 200 KHRQ22M20TA 200 x 260 KHRQ22M29T9 Refnet headers Concerning refnet header...

Page 70: ...0 m 90 m 3 Total piping length x L1 L2 L3 L4 L5 L6 L7 Minimum 10 m x Maximum in case of 8 HP x 300 m Maximum in case of 5 HP If Then L1 30 m x 115 m L1 25 m x 120 m L1 20 m x 125 m L1 15 m x 130 m L1 10 m x 135 m L1 5 m x 140 m 4 EKEXV AHU L4 5 m 5 First branch kit Indoor unit AHU L3 L4 40 m L5 L6 40 m L5 L7 40 m Maximum height differences b 1 Heat exchanger unit Compressor unit H1 10 m 2 Compress...

Page 71: ...piping Keeping in mind the guidelines for Pipe bending Brazing Using the stop valves Removing pinched pipes 16 2 2 Precautions when connecting the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters General safety precautions Preparation DANGER RISK OF BURNING SCALDING NOTICE Take the following precautions on refrigerant piping into account Avoid any...

Page 72: ...reducing valve a b c d e f f a Refrigerant piping b Part to be brazed c Taping d Manual valve e Pressure reducing valve f Nitrogen Do NOT use anti oxidants when brazing pipe joints Residue can clog pipes and break equipment Do NOT use flux when brazing copper to copper refrigerant piping Use phosphor copper brazing filler alloy BCuP which does NOT require flux Flux has an extremely harmful influen...

Page 73: ...re 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 Tightening torques Stop valve size mm Tightening torque N m turn clockwise to close Shaft Valve body Hexagonal wrench Cap valve lid Service port Ø9 5 5 4 6 6 4 mm 13 5 16 5 11 5 13 9 Ø12 7 8 1 9 9 18 0 22 0 Ø19 1 27 0 33 0 8 mm 22 5 27...

Page 74: ... to all service ports at once C a b A c d B C C C D D RDXYQ RDXYQ c c d d b b a a 5 HP 8 HP Method 2 First connect to the first 2 service ports C C b B a A Then connect to the last 2 service ports d B c A C C a b c d Service ports of stop valves e Vacuuming recovery unit A B C Valves A B and C D Refrigerant line splitter 3 Recover gas and oil from the pinched piping by using a recovery unit CAUTIO...

Page 75: ...o connect the refrigerant piping to the compressor unit NOTICE Be sure to use the supplied accessory pipes when carrying out piping work in the field Be sure that the field installed piping does not touch other pipes the bottom panel or side panel 1 Remove the service cover See 15 2 2 To open the compressor unit 463 2 Choose a piping route a or b b a a a To the back b To the top 3 If you have chos...

Page 76: ...ng by brazing as follows 8 HP 5 HP d c c d b a b a 3 1 2 3 2 1 a Liquid line circuit 1 to heat exchanger unit b Gas line circuit 1 to heat exchanger unit c Gas line circuit 2 to indoor units d Liquid line circuit 2 to indoor units 1 Pinched piping 2 Piping accessory 3 Field piping 5 Reattach the service cover 6 Seal all gaps example a to prevent small animals from entering the system a a a a WARNI...

Page 77: ...4 Braze the liquid and gas piping NOTICE Only for 8 HP Piping adapter Ø19 1 22 2 mm delivered as accessory in the compressor unit Use the piping adapter to connect the field piping Ø22 2 mm to the gas piping connection of the heat exchanger unit Ø19 1 mm 5 Remove the wet cloth 6 Put back the 2 insulation pieces peel off the insulation tapes and adhere them to the insulation pieces 7 Reattach the c...

Page 78: ...piping heat exchanger unit and indoor units is impossible when this happens Therefore there will be explained 2 methods for initial installation leak test and vacuum drying Method 1 Before power ON If the system has not yet been powered on no special action is required to perform the leak test and the vacuum drying Method 2 After power ON If the system has already been powered on activate setting ...

Page 79: ... manifold to the service port of all stop valves to increase efficiency refer to 16 3 3 Checking refrigerant piping Setup 479 NOTICE Use a 2 stage vacuum pump with a non return valve or a solenoid valve that can evacuate to a gauge pressure of 100 7 kPa 1 007 bar 5 Torr absolute NOTICE Make sure the pump oil does not flow oppositely into the system while the pump is not working NOTICE Do NOT purge...

Page 80: ...tions to the indoor units and to the heat exchanger unit and all indoor units and the heat exchanger unit itself should also be leak and vacuum tested Keep any possible field supplied field piping valves open as well Refer to the indoor unit installation manual for more details Leak test and vacuum drying should be done before the power supply is set to the unit If not see also the flow chart earl...

Page 81: ...refrigerant piping 4 78 for more information To remove all moisture from the system proceed as follows 1 Evacuate the system for at least 2 hours to a target vacuum of 100 7 kPa 1 007 bar 5 Torr absolute 2 Check that with the vacuum pump turned off the target vacuum is maintained for at least 1 hour 3 Should you fail to reach the target vacuum within 2 hours or maintain the vacuum for 1 hour the s...

Page 82: ...unit through gaps in the insulation and piping because the compressor unit is located higher than the indoor unit or higher than the heat exchanger unit this must be prevented by sealing up the connections See below figure a b a Insulation material b Caulking etc 16 4 Charging refrigerant 16 4 1 About charging refrigerant The compressor unit is factory charged with refrigerant but depending on the...

Page 83: ...es after the compressor unit heat exchanger unit and indoor units are turned on the compressor will not operate before the communication is established in a correct way between the compressor unit heat exchanger unit and indoor units NOTICE Before starting charging procedures In case of 5 HP Check if the 7 LEDs display is as normal see 18 2 4 To access mode 1 or 2 4102 and there is no malfunction ...

Page 84: ...n Stage 1 Pre charging Recommended in case of larger systems Can be skipped but charging will take longer then Stage 2 Manual charging Only necessary if the determined additional refrigerant amount is not reached yet by pre charging Stage 1 Pre charging Summary Pre charging Refrigerant bottle Connected to the service ports of the stop valves Which stop valves to use depends on the circuits you cho...

Page 85: ...Valves A B and C D Refrigerant line splitter 2 Open valves C on line of B and B 3 Pre charge refrigerant until the determined additional refrigerant amount is reached or pre charging is not possible anymore and then close valves C and B 4 Do one of the following If Then The determined additional refrigerant amount is reached Disconnect the manifold from the liquid line s You do not have to perform...

Page 86: ...ake all the precautions mentioned in 18 Configuration 4 99 and 19 Commissioning 4114 into account 8 Turn on the power of the indoor units compressor unit and heat exchanger unit 9 Activate setting 2 20 to start the manual additional refrigerant charge mode For details see 18 2 8 Mode 2 Field settings 4109 Result The unit will start operation INFORMATION The manual refrigerant charge operation will...

Page 87: ...ediately Confirm the malfunction code and take corresponding action 22 3 Solving problems based on error codes 4124 16 4 6 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 accessorie...

Page 88: ...ting the electrical wiring Typical workflow Connecting the electrical wiring typically consists of the following stages 1 Making sure the power supply system complies with the electrical specifications of the units 2 Connecting the electrical wiring to the compressor unit 3 Connecting the electrical wiring to the heat exchanger unit 4 Connecting the electrical wiring to the indoor units 5 Connecti...

Page 89: ...s from a star system They can cause overheating electrical 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 CAUTION Do NOT push or place redundant cable length in the unit NOTICE The distance between the high voltage and low voltage cables should be at least 50 mm NOTI...

Page 90: ...z a Main switch b Earth connection c Power supply wiring including earth sheathed cable F1 F2 Transmission wiring sheathed shielded cable using shielded cable for the transmission wiring is mandatory for 5 HP and optional for 8 HP d Compressor unit e Heat exchanger unit f Indoor unit g User interface Power supply wiring and transmission wiring It is important to keep the power supply and the trans...

Page 91: ...gth distance between compressor unit and furthest indoor unit 300 m Total wiring length distance between compressor unit and all indoor units and between compressor unit and heat exchanger unit 600 m If the total transmission wiring exceeds these limits it may result in communication error No branching is allowed after branching D B C b2 b3 c1 c2 b1 a A A Central user interface etc B Compressor un...

Page 92: ...EC 61000 3 12 European International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low voltage systems with input current 16 A and 75 A per phase It is the responsibility of the installer or user of the equipment to ensure by consultation with the distribution network operator if necessary that the equipment is connected ONLY to a supply with...

Page 93: ... Maximum wiring length distance between compressor unit and furthest indoor unit 300 m Total wiring length distance between compressor unit and all indoor units and between compressor unit and heat exchanger unit 600 m If the total transmission wiring exceeds these limits it may result in communication error 17 2 To connect the electrical wiring on the compressor unit NOTICE Follow the wiring diag...

Page 94: ...elded cable Using shielded cable for the transmission wiring is mandatory for 5 HP and optional for 8 HP X2M F1F2 F1F2 a1 X1M X1M A1P 5 HP 8 HP X2M a2 F1F2 X2M a2 F1F2 RKXYQ5 RDXYQ5 RKXYQ8 RDXYQ8 a1 a2 Earth use the screw delivered as accessory When using shielded cable In case of 5 HP a1 and a2 Connect the shield to the earth of the compressor unit and the heat exchanger unit In case of 8 HP only...

Page 95: ...an turn the switch box horizontally by loosening the screw on the left side of the switch box 1 c 50 mm a b b X1M L1 F1F2 L2 L3 N c a c X2M A1P b a X1M X2M 5 HP 50 mm a b b a X1M X1M A1P X1M b a c c 8 HP X1M A1P c a Transmission wiring b Power supply c Cable tie 5 Reattach the service covers See 17 4 To close the compressor unit 497 6 Connect an earth leakage circuit breaker and fuse to the power ...

Page 96: ...5 TO OUT D TO IN D F1 F2 F1 F2 a1 a2 a2 a F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 b a RKXYQ8 RDXYQ8 TO OUT D TO IN D F1 F2 F1 F2 8 HP 5 HP a Sheathed shielded cable 2 wires no polarity a1 a2 Connection of shield to earth b Terminal board field supply NOTICE Shielded cable Using shielded cable for the transmission wiring is mandatory for 5 HP and optional for 8 HP X2M F1F2 F1F2 a1 X1M...

Page 97: ...ame and fix the cables power supply and transmission wiring with cable ties A1P X1M X2M b a c c a Transmission wiring b Power supply c Cable tie 17 4 To close the compressor unit NOTICE When closing the cover make sure that the tightening torque does NOT exceed 4 1 N m 2 1 4 SW8 5 SW8 17 5 To close the heat exchanger unit NOTICE When closing the cover make sure that the tightening torque does NOT ...

Page 98: ...he poles can drop but if it is at least 1 MΩ then the unit will not break down Use a 500 V mega tester when measuring insulation Do NOT use a mega tester for low voltage circuits 1 Measure the insulation resistance over the poles If Then 1 MΩ Insulation resistance is OK This procedure is finished 1 MΩ Insulation resistance is not OK Go to the next step 2 Turn ON the power and leave it on for 6 hou...

Page 99: ...information about Making field settings Energy saving and optimum operation INFORMATION It is important that all information in this chapter is read sequentially by the installer and that the system is configured as applicable DANGER RISK OF ELECTROCUTION 18 2 Making field settings 18 2 1 About making field settings To configure the heat pump system you must give input to the compressor unit s mai...

Page 100: ...g manual adding refrigerant setting etc In such a case it is required to abort the special operation before normal operation can restart It will be indicated in below explanations 18 2 2 To access the field setting components See 15 2 2 To open the compressor unit 463 18 2 3 Field setting components The components to make field settings differ depending on the model Model Field setting components ...

Page 101: ...with an insulated stick such as a closed ball point pen to avoid touching of live parts The push buttons differ depending on the model Model Push buttons 5 HP BS1 MODE For changing the set mode BS2 SET For field setting BS3 RETURN For field setting BS4 TEST For test operation BS5 RESET For resetting the address when the wiring is changed or when an additional indoor unit is installed 8 HP BS1 MODE...

Page 102: ...running to the crankcase heater and to protect the compressor Turn on the power supply of the compressor unit heat exchanger unit and all indoor units When the communication between the compressor unit heat exchanger unit and indoor units is established and normal the display indication state will be as below default situation when shipped from factory 1 2 min 8 10 min 10 12 min 5 HP 8 HP b c b a ...

Page 103: ...nd in default situation you can read out some information How to do this differs depending on the model Example 7 LEDs display Default situation in case of 5 HP You can read out the status of low noise operation as follows Action Button display 1 Make sure the LEDs are showing the default situation H1P OFF 2 Check the status of LED H6P H6P OFF Unit is currently not operating under low noise restri...

Page 104: ...follows Action Button display 1 Start from the default situation 2 Select mode 1 BS1 1 3 Select setting 10 X depends on the setting that you want to select BS2 X 4 Display the value of setting 10 there are 8 units connected BS3 1 5 Quit mode 1 BS1 1 18 2 6 To use mode 2 In mode 2 you can make field settings to configure the system How to do this differs slightly depending on the model Example 7 LE...

Page 105: ...ure during cooling operation to 4 8 C as follows Action Button display 1 Start from the default situation 2 Select mode 2 BS1 5 s 3 Select setting 8 X depends on the setting that you want to select BS2 X 4 Select value 4 8 C a Display the current value b Change to 4 X depends on the current value and the value that you want to select c Enter the value in the system d Confirm The system starts oper...

Page 106: ...second method is to enable low noise operation based on an external input For this operation an optional accessory is required H7P Shows the status of power consumption limitation operation OFF Unit is currently not operating under power consumption limitations ON Unit is currently operating under power consumption limitation Power consumption limitation reduces the power consumption of the unit c...

Page 107: ...elevant malfunction codes are explained Detailed information about malfunction codes can be consulted in the service manual of this unit To obtain more detailed information about the malfunction code press BS2 up to 3 times 1 15 Shows the 2nd last malfunction code 1 16 Shows the 3rd last malfunction code 7 segments display Mode 1 in case of 8 HP You can read out the following information Setting V...

Page 108: ...nformation see setting 2 8 1 6 Shows the current Tc target parameter position For more information see setting 2 9 1 10 Shows the total number of connected units heat exchanger unit indoor units It can be convenient to check if the total number of units which are installed heat exchanger unit indoor units match the total number of units which are recognised by the system In case there is a mismatc...

Page 109: ...value 5 HP 7 LEDs display The seven LEDs give a binary representation of the setting value number 8 HP 7 segments display The three 7 segments show the setting value number For more information and advice about the impact of the following settings see 18 3 Energy saving and optimum operation 4113 In case of 5 HP settings 2 8 2 9 2 41 and 2 42 In case of 8 HP settings 2 8 2 9 2 81 and 2 82 Setting ...

Page 110: ...c pressure of the heat exchanger unit according to the ducting requirements 0 30 Pa 1 default default 60 Pa 2 90 Pa 3 120 Pa 4 150 Pa 2 16 Test run heat exchanger unit When activated the heat exchanger fans start running This allows you to check the ducting with a running heat exchanger unit 0 default Deactivated 1 Activated 2 20 Manual additional refrigerant charge In order to add the additional ...

Page 111: ...ate the automatic low noise operation function of the unit and define the level of operation Depending on the chosen level the noise level will be lowered The start and stop moments for this function are defined under setting 2 26 and 2 27 0 default default Deactivated 1 Level 1 Level 3 Level 2 Level 1 2 Level 2 3 Level 3 2 25 Low noise operation level via the external control adaptor If the syste...

Page 112: ...nder 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 step 2 The level is according to the table binary 1 30 1 default binary 2 default 40 2 binary 4 50 3 55 2 32 Forced all time power consumption limitation operation no external control adaptor is required to perform power consu...

Page 113: ... heat pump system is equipped with advanced energy saving functionality Depending on the priority emphasises can be put on energy saving or comfort level Several parameters can be selected resulting in the optimal balance between energy consumption and comfort for the particular application Several patterns are available and explained below Modify the parameters to the needs of your building and t...

Page 114: ...or the heat exchanger unit while performing a test operation is dangerous CAUTION Do NOT insert fingers rods or other objects into the air inlet or outlet Do NOT remove the fan guard When the fan is rotating at high speed it will cause injury INFORMATION During the first running period of the unit the required power may be higher than stated on the nameplate of the unit This phenomenon is caused b...

Page 115: ... that the fuses circuit breakers or the locally installed protection devices are of the size and type specified in the chapter 17 1 5 Safety device requirements 492 Be sure that neither a fuse nor a protection device has been bypassed Internal wiring Visually check the electrical component box and the inside of the unit for loose connections or damaged electrical components Pipe size and pipe insu...

Page 116: ...ystem This operation checks and judges following items Check of wrong wiring communication check with indoor units and heat exchanger unit Check of the stop valves opening Check of wrong piping Example Gas or liquid pipes switched Judgement of piping length Abnormalities on indoor units cannot be checked for each unit separately After the test operation is finished check the indoor units one by on...

Page 117: ...g stable condition Communication check Stop valve check Pipe length check Pump down operation Unit stop INFORMATION During the test operation it is not possible to stop the unit operation from a user interface To abort the operation press BS3 The unit will stop after 30 seconds 4 Check the test operation results on the compressor unit 7 LEDs display Completion Description Normal completion Abnorma...

Page 118: ...tion press BS3 The unit will stop after 30 seconds 4 Check the test operation results on the compressor unit 7 segment display Completion Description Normal completion No indication on the 7 segment display idle Abnormal completion Indication of malfunction code on the 7 segment display Refer to 19 3 4 Correcting after abnormal completion of the test run 4118 to take actions for correcting the abn...

Page 119: ...er reference guide 119 RKXYQ5T8 8T7Y1B RDXYQ5T8 8T7V1B VRV IV heat pump for indoor installation 4P499898 1B 2021 12 INFORMATION Refer to the installation manual of the indoor unit for detailed malfunction codes related to indoor units ...

Page 120: ...it operates properly please make sure the following is clear 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 ...

Page 121: ...e and service 121 21 2 Maintenance safety precautions 121 21 2 1 To prevent electrical hazards 121 21 3 Checklist for yearly maintenance of the heat exchanger unit 122 21 4 About service mode operation 122 21 4 1 To use vacuum mode 122 21 4 2 To recover refrigerant 123 21 1 Overview Maintenance and service This chapter contains information about Preventing electrical hazards when maintaining and s...

Page 122: ...ly maintenance of the heat exchanger unit Check the following at least once a year Heat exchanger The heat exchanger 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 21 4 About service mode operation Refrigerant recovery operation vacuuming oper...

Page 123: ...case of 8 HP to stop vacuuming mode 21 4 2 To recover refrigerant This should be done with a refrigerant recovery unit Follow the same procedure as for vacuuming method 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...

Page 124: ...ins 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 RISK OF ELECTROCUTION WARNING Prevent hazards due to inadverten...

Page 125: ...de Sub code 22 3 1 Error codes Overview In case of 5 HP Main code Cause Solution Heat exchanger fan malfunction Drain pump feedback contact is open In the heat exchanger unit Check connection on PCB A1P X15A Check connection on terminal block X2M Check the fan connectors The stop valves of the compressor unit are left closed Refrigerant overcharge Open the stop valves on both the gas and liquid si...

Page 126: ...malfunction Heat exchanger unit R2T A1P X18A Check connection on PCB or actuator Suction temperature sensor malfunction Compressor unit R3T A1P X12A Compressor unit R5T A1P X12A Check connection on PCB or actuator Coil temperature sensor malfunction Heat exchanger unit R3T A1P X17A Check connection on PCB or actuator Liquid temperature sensor after subcool HE malfunction Compressor unit R7T A1P X1...

Page 127: ...or unit are left closed The piping and wiring of the specified indoor unit or heat exchanger unit are not connected correctly to the compressor unit Open the stop valves on both the gas and liquid side Confirm that the piping and wiring of the specified indoor unit or heat exchanger unit are connected correctly to the compressor unit In case of 8 HP Main code Sub code Cause Solution Heat exchanger...

Page 128: ...t R21T A1P X29A Open stop valves Check refrigerant amount recharge unit Refrigerant overcharge Stop valve closed Check refrigerant amount recharge unit Open stop valves Ambient temperature sensor malfunction Heat exchanger unit R1T A1P X16A Check connection on PCB or actuator Discharge temperature sensor malfunction Compressor unit R21T open circuit A1P X29A Check connection on PCB or actuator Dis...

Page 129: ...ensor malfunction Compressor unit S1NPL short circuit A1P X31A Check connection on PCB or actuator Transmission outdoor unit inverter INV1 transmission trouble Compressor unit A1P X20A X28A X42A Check connection INV1 unbalanced power supply voltage Check if power supply is within range Heat exchanger unit capacity setting malfunction Check the type of heat exchanger unit If necessary replace the h...

Page 130: ...hat are currently connected If they are not proper replace them with proper ones Check if the compressor unit and heat exchanger unit are compatible 5 HP heat exchanger unit connected Check installation Connect 8 HP heat exchanger unit Auto address malfunction inconsistency Mismatch of compressor unit and heat exchanger unit Check if transmission wired unit amount matches with powered unit amount ...

Page 131: ...ndoor installation 4P499898 1B 2021 12 23 Disposal NOTICE Do NOT try to dismantle the system yourself dismantling of the system treatment of the refrigerant oil and other parts MUST comply with applicable legislation Units MUST be treated at a specialised treatment facility for reuse recycling and recovery ...

Page 132: ...agram Compressor unit 134 24 3 Wiring diagram Heat exchanger unit 137 24 1 Piping diagram Compressor unit and heat exchanger unit 5 HP R2T R3T R1T M1F M2F Y1E Y3E R2T M1C R3T R7T R4T Y1S S1NPL S1PH S1NPH R5T f f l c b f g a d f m h f i j k e B A 3D110524 1 A Heat exchanger unit B Compressor unit a Stop valve gas circuit 2 to indoor units b Stop valve liquid circuit 2 to indoor units c Stop valve l...

Page 133: ...switch Y1E Y3E Electronic expansion valve Y1S Solenoid valve 4 way valve Heating Cooling 8 HP Y2E R21T M1C R3T R5T R6T Y1S S1NPL S1PH S1NPH R7T c b f g a d f h f i j e B k f i R2T R3T R1T M1F M2F Y1E M3F f f l A 3D104510 1 A Heat exchanger unit B Compressor unit a Stop valve gas circuit 2 to indoor units b Stop valve liquid circuit 2 to indoor units c Stop valve liquid circuit 1 to heat exchanger ...

Page 134: ... 2 Wiring diagram Compressor unit The wiring diagram is delivered with the unit located on the switch box cover Symbols X1M Main terminal Earth wiring 15 Wire number 15 Field wire Field cable 12 2 Connection continues on page 12 column 2 1 Several wiring possibilities Option Not mounted in switch box Wiring depending on model PCB Legend for wiring diagram 5 HP A1P Printed circuit board main A2P Pr...

Page 135: ...trip power supply X2M Terminal strip transmission wiring X Y Connector Y3E Electronic expansion valve Y1S Solenoid valve 4 way valve Z C Noise filter ferrite core Z F Noise filter A1P Notes for 8 HP 1 When using the optional adapter refer to the installation manual of the optional adapter 2 Refer to the installation or service manual on how to use BS1 BS3 push buttons and DS1 DS2 DIP switches 3 Do...

Page 136: ...upply A1P A3P Q1DI Earth leakage circuit breaker field supply Q1RP Phase reversal detect circuit A1P R21T Thermistor M1C discharge R3T Thermistor accumulator R5T Thermistor subcool liquid pipe R6T Thermistor heat exchanger gas pipe R7T Thermistor suction R Resistor A3P S1NPH High pressure sensor S1NPL Low pressure sensor S1PH High pressure switch discharge S1S Air control switch optional S2S Cool ...

Page 137: ...nal Earth wiring 15 Wire number 15 Field wire Field cable 12 2 Connection continues on page 12 column 2 1 Several wiring possibilities Option Not mounted in switch box Wiring depending on model PCB Legend for wiring diagram 5 8 HP A1P Printed circuit board main A2P Printed circuit board adapter C1 Capacitor A1P E1H Drain pan heater optional F1U Fuse F 1 A 250 V optional F1U Fuse T 6 3 A 250 V for ...

Page 138: ...7Y1B RDXYQ5T8 8T7V1B VRV IV heat pump for indoor installation 4P499898 1B 2021 12 V1R Diode module A1P X1M Terminal strip power supply X2M Terminal strip transmission wiring X Y Connector Y1E Electronic expansion valve Z1C Noise filter ferrite core Z1F Noise filter A1P ...

Page 139: ...a certain product or 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 Accessori...

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