Daikin RXYSQ6T7Y1B9 User Manual Download

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Installer and user reference guide

VRV IV-S system air conditioner

English

Installer and user

reference guide

VRV IV-S system air conditioner

RXYSQ6T7Y1B9

Summary of Contents for RXYSQ6T7Y1B9

Page 1: ...Installer and user reference guide VRV IV S system air conditioner English Installer and user reference guide VRV IV S system air conditioner RXYSQ6T7Y1B9 ...

Page 2: ...6 To braze the pipe end 17 6 4 7 Using the stop valve and service port 17 6 4 8 To connect the refrigerant piping to the outdoor unit 18 6 4 9 To connect the refrigerant branching kit 19 6 5 Checking the refrigerant piping 19 6 5 1 About checking the refrigerant piping 19 6 5 2 Checking refrigerant piping General guidelines 20 6 5 3 Checking refrigerant piping Setup 20 6 5 4 To perform a leak test...

Page 3: ...replacement cycles 54 20 Troubleshooting 54 20 1 Error codes Overview 55 20 2 Symptoms that are not air conditioner troubles 56 20 2 1 Symptom The system does not operate 56 20 2 2 Symptom Cool Heat cannot be changed over 56 20 2 3 Symptom Fan operation is possible but cooling and heating do not work 56 20 2 4 Symptom The fan strength does not correspond to the setting 56 20 2 5 Symptom The fan di...

Page 4: ...to prevent potential negative consequences for the environment and human health 1 3 For the installer 1 3 1 General If you are not sure how to install or operate the unit contact your dealer NOTICE Improper installation or attachment of equipment or accessories could result in electric shock short circuit leaks fire or other damage to the equipment Only use accessories optional equipment and spare...

Page 5: ... the refrigerant system is to be opened refrigerant must be treated according to the applicable legislation WARNING Make sure there is no oxygen in the system Refrigerant may only be charged after performing the leak test and the vacuum drying In case re charge is required refer to the nameplate of the unit It states the type of refrigerant and necessary amount The unit is factory charged with ref...

Page 6: ...nverter resistant to high frequency electric noise to avoid unnecessary opening of the earth leakage protector NOTICE Precautions when laying power wiring Do not connect wiring of different thicknesses to the power terminal block slack in the power wiring may cause abnormal heat When connecting wiring which is the same thickness do as shown in the figure below For wiring use the designated power w...

Page 7: ...after the box with the outdoor unit is delivered on site It contains information about Unpacking and handling the units Removing the accessories from the units Keep the following in mind At delivery the unit must be checked for damage Any damage must be reported immediately to the carrier s claims agent Bring the packed unit as close as possible to its final installation position to prevent damage...

Page 8: ...e time make sure NOT to switch the service panels between different models 4 2 1 Identification label Outdoor unit Location Model identification Example R X Y S Q 6 T7 Y1 B Code Explanation R Outdoor air cooled X Heat pump no continuous heating Y Single module S S series Q Refrigerant R410A 6 Capacity class T7 VRV IV series Y1 Power supply B European market Minor model change indication 4 3 About ...

Page 9: ... noise operation and power consumption limitation operation The external control adapter has to be installed in the indoor unit PC configurator cable EKPCCAB You can make several commissioning field settings through a personal computer interface For this option EKPCCAB is required which is a dedicated cable to communicate with the outdoor unit The user interface software is available on http www d...

Page 10: ...unit Where the voltage fluctuates a lot In vehicles or vessels Where acidic or alkaline vapour is present Seaside installation Make sure the outdoor unit is NOT directly exposed to sea winds This is to prevent corrosion caused by high levels of salt in the air which might shorten the life of the unit Install the outdoor unit away from direct sea winds Example Behind the building b c a If the outdo...

Page 11: ...pace in to which it could leak The unit of measurement of the concentration is kg m3 the weight in kg of the refrigerant gas in 1 m3 volume of the occupied space Compliance to the local 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 spac...

Page 12: ...de 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 80 mm t Ø 15 9 mm 5 8 Annealed O 0 99 mm 19 1 mm 3 4 Half hard 1 2H 0 80 mm a Depending on the applicable legislation and the unit s maximum working pressure see PS High on the unit name plate larger piping thickness might be required Flare connections Only use annealed material 5 3 3 To sel...

Page 13: ...ndoor unit capacity index Refrigerant branch kit 176 KHRQ22M20T Refnet headers Concerning refnet headers choose from the following table in accordance with the total capacity of all the indoor units connected below the refnet header Indoor unit capacity index Refrigerant branch kit 176 KHRQ22M29H INFORMATION Maximum 8 branches can be connected to a header 5 3 5 Refrigerant piping length and height...

Page 14: ...g length distance between outdoor and all indoors 600 m If the total transmission wiring exceeds these limits it may result in communication error 6 Installation 6 1 Overview Installation This chapter describes what you have to do and know on site to install the system Typical workflow Installation typically consists of the following stages Mounting the outdoor unit Mounting the indoor units Conne...

Page 15: ...nd washers field supply as follows mm 150 6 2 0 350 3 4 5 3 5 5 4 M12 a a Make sure not to cover the drain holes INFORMATION The recommended height of the upper protruding part of the bolts is 20 mm 20 NOTICE Fix the outdoor unit to the foundation bolts using nuts with resin washers a If the coating on the fastening area is stripped off the nuts rust easily a 6 3 4 To install the outdoor unit 4 M1...

Page 16: ...R RISK OF BURNING NOTICE Take the following precautions on refrigerant piping into account Avoid anything but the designated refrigerant to get mixed into the refrigerant cycle e g air Only use R410A when adding refrigerant Only use installation tools e g manifold gauge set that are exclusively used for R410A installations to withstand the pressure and to prevent foreign materials e g mineral oils...

Page 17: ...flawless b The pipe end must be evenly flared in a perfect circle c Make sure the flare nut is fitted 6 4 6 To braze the pipe end NOTICE Precautions when connecting field piping Add brazing material as shown in the figure 1 1 Ø25 4 When brazing blow through with nitrogen to prevent creation of large quantities of oxidised film on the inside of the piping This film adversely affects valves and comp...

Page 18: ...t 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 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 Ø15 9 13 5 16 5 6 mm 22 5 27 5 6 4 8 To con...

Page 19: ...nches either horizontally or vertically Mount the refnet header so that it branches horizontally A B 3 0 a b c a a Horizontal surface b Refnet joint mounted vertically c Refnet joint mounted horizontally 6 5 Checking the refrigerant piping 6 5 1 About checking the refrigerant piping Refrigerant piping works are finished The indoor units and or outdoor unit were already powered ON Use procedure Met...

Page 20: ...op valve Close Gas line stop valve Close NOTICE The connections to the indoor units and all indoor units 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 earlier desc...

Page 21: ...efrigerant but depending on the field piping you have to charge additional refrigerant Before charging refrigerant Make sure the outdoor unit s external refrigerant piping is checked leak test vacuum drying Typical workflow Charging additional refrigerant typically consists of the following stages 1 Determining how much you have to charge additionally 2 Charging additional refrigerant pre charging...

Page 22: ...e stop valve g Gas line stop valve A Valve A B Valve B C Valve C 2 Open valves C 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 You do not have to pe...

Page 23: ...frigerant charge see unit name plate c Additional refrigerant amount charged d Total refrigerant charge e Greenhouse gas emissions of the total refrigerant charge expressed as tonnes CO2 equivalent f GWP Global warming potential NOTICE In Europe the greenhouse gas emissions of the total refrigerant charge in the system expressed as tonnes CO2 equivalent is used to determine the maintenance interva...

Page 24: ...e absorber or telephone earth Incomplete earth may cause electrical shock Make sure to use a dedicated power circuit NEVER use a power supply shared by another appliance Make sure to install the required fuses or circuit breakers Make sure to install an earth leakage protector Failure to do so may cause electric shock or fire When installing the earth leakage protector make sure it is compatible w...

Page 25: ...le core wire c b c a a A AA A a Curled single core wire b Screw c Flat washer Stranded conductor wire with round crimp style terminal c b b a c a B B a Terminal b Screw c Flat washer Tightening torques Wiring Screw size Tightening torque N m Power supply wiring power supply shielded ground M5 2 2 2 7 Transmission wiring M3 5 0 8 0 97 6 8 5 To connect the electrical wiring on the outdoor unit NOTIC...

Page 26: ... knockout hole When you do not use a wire conduit protect the wires with vinyl tubes to prevent the edge of the knockout hole from cutting the wires a b c d e A B A Inside of the outdoor unit B Outside of the outdoor unit a Wire b Bush c Nut d Frame e Hose 7 Reattach the service cover See 6 9 2 To close the outdoor unit on page 26 8 Connect an earth leakage circuit breaker and fuse to the power su...

Page 27: ...ld settings of the system Consulting the current field setting value and changing the current field setting value is possible In general normal operation can be resumed without special intervention after changing field settings Some field settings are used for special operation e g 1 time operation recovery vacuuming setting manual adding refrigerant setting etc In such a case it is required to ab...

Page 28: ...1 and mode 2 B S 1 5 s B S 1 B S 1 B S 1 a c b a Default situation H1P OFF b Mode 1 H1P flashing c Mode 2 H1P ON BS1 Press BS1 BS1 5 s Press BS1 for at least 5 s INFORMATION If you get confused in the middle of the process press BS1 to return to the default situation 7 2 5 To use mode 1 In mode 1 and in default situation you can read out some information Example 7 LEDs display Default situation Yo...

Page 29: ...ompared to nominal operating conditions Power consumption limitation can be set in mode 2 There are two methods to activate power consumption limitation of the outdoor unit system The first method is to enable a forced power consumption limitation by field setting The unit will always operate at the selected power consumption limitation The second method is to enable power consumption limitation b...

Page 30: ...ion was not aborted by pushing BS3 the unit will stop its operation after 30 minutes If 30 minutes was not sufficient to add the needed refrigerant amount the function can be reactivated by changing the field setting again 2 21 Refrigerant recovery vacuuming mode In order to achieve a free pathway to reclaim refrigerant out of the system or to remove residual substances or to vacuum the system it ...

Page 31: ... power consumption limitation If the system always needs to be running under power consumption limitation conditions this setting activates and defines the level power consumption limitation that will be applied continuously The level is according to the table default Function not active Follows 2 30 setting Follows 2 31 setting 2 41 Cooling comfort setting This setting is used in conjunction with...

Page 32: ...level can be selected The comfort level is related to the timing and the effort energy consumption which is put in achieving a certain room temperature by temporarily changing the refrigerant temperature to different values in order to achieve requested conditions more quickly Powerful Overshoot during heating operation or undershoot during cooling operation is allowed compared to the requested re...

Page 33: ...n 2 41 0 This setting is used in conjunction with setting 2 8 Heating operation 2 42 0 This setting is used in conjunction with setting 2 9 7 3 3 Example Automatic mode during cooling A B E 100 50 Te C D 3 C 6 C 35 C F A Actual load curve B Virtual load curve initial capacity automatic mode C Virtual target value initial evaporation temperature value automatic mode D Required evaporation temperatu...

Page 34: ... the outdoor unit and the indoor units will start up Make sure that the preparations of all indoor units are finished field piping electrical wiring air purge See installation manual of the indoor units for details 8 3 Checklist before commissioning After the installation of the unit first check the following items Once all below checks are fulfilled the unit must be closed only then can the unit ...

Page 35: ...oud and the display indication may change These are not malfunctions 8 4 2 To perform a test run 7 LEDs display 1 Make sure all field settings you want are set see 7 2 Making field settings on page 27 2 Turn ON the power to the outdoor unit and the connected indoor units NOTICE Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to prote...

Page 36: ...in circuit is less than 50 V DC C C A2P A1P 3 To prevent damaging the PCB touch a non coated metal part to eliminate static electricity before pulling out or plugging in connectors 4 Pull out junction connectors for the fan motors in the outdoor unit before starting service operation on the inverter equipment Be careful not to touch the live parts If a fan rotates due to strong wind it may store e...

Page 37: ... codes Overview Main code Cause Solution The stop valve of an outdoor unit is left closed Refrigerant overcharge Open the stop valve on both the gas and liquid side Recalculate the required amount of refrigerant from the piping length and correct the refrigerant charge level by recovering any excessive refrigerant with a refrigerant recovery machine The stop valve of an outdoor unit is left closed...

Page 38: ...yet executed system operation not possible Execute system test run No power is supplied to the outdoor unit Check if the power wiring for the outdoor unit is connected correctly Faulty wiring to Q1 Q2 Check Q1 Q2 wiring System mismatch Wrong type of indoor units combined R410A R407C RA etc Indoor unit malfunction Check if other indoor units have malfunction and confirm indoor unit mix is allowed I...

Page 39: ...ons in mm 140 620 140 350 345 355 40 94 43 59 30 320 30 900 1345 24 30 19 89 142 89 60 54 95 423 430 19 80 145 54 95 84 55 148 223 55 13 67 52 71 16 16 58 117 102 70 45 376 191 3TW30374 1D f a b c d e f h g f g h i j f g h a Gas pipe connection Ø15 9 flare b Liquid pipe connection Ø9 5 flare c Service port refrigerant charge in the unit d Service port high pressure in the unit e Electronic connect...

Page 40: ... HD HD HU 100 1000 1000 500 HU HD HU 200 1000 1000 500 HD HU 200 1700 1000 500 HU a b 100 100 c d e eB eD A B C D E HB HD A B C 200 300 1000 A B C E 200 300 1000 1000 500 D 1000 D E 1000 1000 500 B D HD HU 300 1000 HD HU 250 1500 HU HD HU 300 1500 B D E HB HD HB HU 300 1000 1000 500 HU HB HU 300 1250 1000 500 HB HU HB HD HD HU 250 1500 1000 500 HU HD HU 300 1500 1000 500 HD HU 300 2200 1000 500 A ...

Page 41: ...2 A1 If there is danger of drainage dripping and freezing between the upper and lower units A2 Then install a roof between the upper and lower units Install the upper unit high enough above the lower unit to prevent ice buildup at the upper unit s bottom plate B1 B2 B1 If there is no danger of drainage dripping and freezing between the upper and lower units B2 Then it is not required to install a ...

Page 42: ...ssure e Service port refrigerant charge f Cable tie mountings to fix the field wiring with cable ties to ensure stress relief g Stop valve gas h Stop valve liquid i Accumulator j Fan A1P Printed circuit board main M1C Motor compressor M1F M2F Motor upper and lower fan S1PH High pressure switch X1M Terminal strip power supply wiring X2M Terminal strip transmission wiring Y1E Electronic expansion va...

Page 43: ...r g Service port high pressure h Check valve i Compressor accumulator j Capillary tube k Service port refrigerant charge l Accumulator M1C Compressor M1F M2F Fan motor R1T Thermistor air R2T Thermistor discharge R3T Thermistor suction 1 R4T Thermistor heat exchanger R5T Thermistor suction 2 R6T Thermistor subcool heat exchanger R7T Thermistor liquid pipe S1NPH High pressure sensor S1NPL Low pressu...

Page 44: ...or option note 6 cool heat selector cable option note 2 Switch box Upper side Front side Position in switchbox Notes for RXYSQ6_Y1 1 Symbols see below 2 For X37A refer to the installation manual of the option 3 Refer to the installation or service manual on how to use BS1 BS4 push buttons and DS1 1 and DS1 2 DIP switches 4 Do not operate the unit by short circuiting protection device S1PH 5 Refer ...

Page 45: ...d pipe R10T Thermistor fin S1NPH High pressure sensor S1NPL Low pressure sensor S1PH High pressure switch S1S Air control switch option S2S Cool heat selector switch option V1R IGBT power module A2P V2R V3R Diode module A2P X A PCB connector X M Terminal strip X Y Connector X37A Connector power supply for option PCB Y1E Electronic expansion valve main Y3E Electronic expansion valve subcool heat ex...

Page 46: ...d level nominal e Sound power f 70 dBA Sound pressure g 51 dBA Refrigerant Type R410A Charge 3 6 kg Refrigerant oil FVC50K Safety devices High pressure switch Fan driver overload protector Inverter overload protector PCB 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 ...

Page 47: ...ed on indoor unit temperature 27 C DB and 19 C WB outdoor temperature 35 C DB b MSC the maximum current during startup of the compressor VRV IV S uses only inverter compressors MCA must be used to select the correct field wiring size The MCA can be regarded as the maximum running current c MCA must be used to select the correct field wiring size The MCA can be regarded as the maximum running curre...

Page 48: ...it Total capacity of indoor units needs to be within the specified range The connection ratio CR 50 CR 110 HP class of outdoor unit 50 minimum CR VRV DX 110 maximum CR 6 80 176 NOTICE When selecting the total capacity higher than mentioned in above table cooling and heating capacity will drop For additional information see technical engineering data ...

Page 49: ...in the dedicated installation and operation manual of the indoor unit Refer to the operation manual of the installed user interface 16 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 It is not good for your health to expose your body to the air flow for a long time...

Page 50: ...ndoor fan is automatically stopped The display of the user interface shows It may take some time before the fan starts This is not a malfunction INFORMATION The heating capacity drops when the outside temperature falls If this happens use another heating device together with the unit When using together with appliances that produce open fire ventilate the room constantly Do not place appliances th...

Page 51: ...17 4 Adjusting the air flow direction on page 51 for details To stop 5 Press the ON OFF button on the user interface once again Result The operation lamp goes out and the system stops operating NOTICE Do not turn off power immediately after the unit stops but wait for at least 5 minutes 17 4 Adjusting the air flow direction Refer to the operation manual of the user interface 17 4 1 About the air f...

Page 52: ...not to cool or heat too much To save energy keep the temperature setting at a moderate level Never place objects near the air inlet or the air outlet of the unit It may cause deterioration in the effect or stop the operation Turn off the main power supply switch to the unit when the unit is not used for longer periods of time If the switch is on it consumes electricity Before restarting the unit t...

Page 53: ...nce 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 17 2 2 About cooling heating fan only and automatic operation on page 50 for details on fan only operation Turn off the power The user interface display disappears Clean air filters and casings of indoor units Contact your...

Page 54: ...nding on the content of the maintenance and inspection contract inspection and maintenance cycles may in reality be shorter than listed 19 4 4 Shortened maintenance and replacement cycles Shortening of maintenance cycle and replacement cycle needs to be considered in following situations The unit is used in locations where Heat and humidity fluctuate out of the ordinary Power fluctuation is high v...

Page 55: ... and serial number you can find this information on the nameplate of the unit For your reference a list with malfunction codes is provided You can depending on the level of the malfunction code reset the code by pushing the ON OFF button If not ask your installer for advice Main code Contents External protection device was activated EEPROM failure indoor Drain system malfunction indoor Fan motor m...

Page 56: ...the button is pressed 20 2 5 Symptom The fan direction does not correspond to the setting The fan direction does not correspond with the user interface display The fan direction does not swing This is because the unit is being controlled by the micro computer 20 2 6 Symptom White mist comes out of a unit Indoor unit When humidity is high during cooling operation If the interior of an indoor unit i...

Page 57: ...our dealer for removing and reinstalling the total unit Moving units requires technical expertise 22 Disposal This unit uses hydrofluorocarbon Contact your dealer when discarding this unit It is required by law to collect transport and discard the refrigerant in accordance with the hydrofluorocarbon collection and destruction regulations 23 Glossary Dealer Sales distributor for the product Authori...

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