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46

step 5 Insert the RJ45 plug into the front plug connector until there is an audible click and tighten

the housing. Install the gasket and fasten the swivel nut.

step 6 Remove the waterproof lid from the

COM1

terminal and install WiNet-S.

step 7 Slightly shake it by hand to determine whether it is installed firmly.

- - End

5.7.2 WLAN Communication

step 1 Remove the waterproof lid from the

COM1

terminal.

step 2 Install the module. Slightly shake it by hand to determine whether it is installed firmly, as

shown below.

5 Electrical Connection

User Manual

Содержание SG12RT

Страница 1: ...G12RT SG15RT SG17RT SG20RT3 Phase PV Grid Connected InverterUser ManualSG3 0 20RT UEN Ver18 202211 User Manual 3 Phase PV Grid Connected Inverter SG3 0RT SG4 0RT SG5 0RT SG6 0RT SG7 0RT SG8 0RT SG10RT...

Страница 2: ......

Страница 3: ...anual are owned by SUNGROW All other trademarks or registered trademarks mentioned in this manual are owned by their respective owners Software Licenses It is prohibited to use data contained in firmw...

Страница 4: ...s manual is intended for professional technicians who are responsible for installation op eration and maintenance of inverters and users who need to check inverter parameters The inverter must only be...

Страница 5: ...which are highlighted with the following symbols to ensure personal and property safety during usage or to help optimize the prod uct performance in an efficient way Please carefully understand the me...

Страница 6: ......

Страница 7: ...mbols on the Product 9 2 4 LED Indicator 10 2 5 Circuit Diagram 10 2 6 Function Description 11 3 Unpacking and Storage 16 3 1 Unpacking and Inspection 16 3 2 Inverter Storage 16 4 Mechanical Mounting...

Страница 8: ...ng the PV Connectors 41 5 6 3 Installing the PV Connectors 43 5 7 WiNet S Connection 44 5 7 1 Ethernet Communication 44 5 7 2 WLAN Communication 46 5 8 WiFi Connection for Brazil 47 5 9 Meter Connecti...

Страница 9: ...rs 83 7 10 4 Communication Parameters 89 7 10 5 Firmware Update 89 7 10 6 Auto test 90 7 10 7 SPI for Italy CEI0 21 Grid Code Only 92 8 System Decommissioning 93 8 1 Disconnecting the Inverter 93 8 2...

Страница 10: ......

Страница 11: ...or any safety in struction in this manual When installing operating and maintaining the product comply with local laws and regulations The safety precautions in this manual are only supplements to lo...

Страница 12: ...Connection Safety Before electrical connections please make sure that the inverter is not damaged otherwise it may cause danger Before electrical connections please make sure that the inverter switch...

Страница 13: ...n the PV generation system must be firmly attached properly insulated and adequately dimensioned Check the positive and negative polarity of the PV strings and connect the PV con nectors to correspond...

Страница 14: ...k the inverter status If the inverter indicator is off please wait until night to disconnect the DC switch If the inverter indicator is on directly disconnect the DC switch After the inverter is power...

Страница 15: ...l If necessary contact your distributor first If the problem persists contact SUNGROW Otherwise the losses caused is not covered by the warranty 1 6 Disposal Safety Please scrap the product in accorda...

Страница 16: ...PV strings to be grounded This can cause dam age to the inverter Do not connect any local load between the inverter and the AC circuit breaker The inverter applies only to the scenarios described in...

Страница 17: ...The model description is as follows take SG10RTas an example Appearance The following figure shows the appearance of the inverter The image shown here is for reference only The actual product received...

Страница 18: ...cket for hang ing the inverter 4 Label Information about COM2 pin definition supported DRM modes etc 5 DC switch To safely disconnect the DC circuit whenever necessary 6 Electrical connec tion area DC...

Страница 19: ...ormity EU EEA Importer UKCA mark of conformity Do not dispose of the inverter together with household waste The inverter does not have a transformer Disconnect the inverter from all the external power...

Страница 20: ...icates the working state of the inverter table 2 1 State description of the LED indicator LED color State Definition Blue On The inverter is operating normally Flashing The inverter is at standby or s...

Страница 21: ...it into the grid The AC filter filters the output AC component of high frequency to ensure that the output current meets the grid requirements The AC relay isolates the AC output of the inverter from...

Страница 22: ...wer supply After the connection if the earth fault occurs the DO dry contact will switch on automatically to signal the external alarm DRM AU NZ The DRM function is only applicable to a single inverte...

Страница 23: ...the PID module will apply inverse voltage to PV modules to restore the degraded modules If the PID recovery function is enabled it only works at night After the PID recovery function is enabled the vo...

Страница 24: ...est under the working conditions as required by the standard SPI Function for Italy CEI0 21 Grid Code Only The inverter SPI interface only for Italy is able to easily choose the grid protection mode b...

Страница 25: ...s 195 5 V 4 s 27 S2 34 5 V 0 2 s 34 5 V 0 2 s 34 5 V 0 2 s 34 5 V 0 2 s 34 5 V 4 s 81 S1 50 2 Hz 0 1 s 50 2 Hz 0 1 s 51 5 Hz 4 s 81 S1 49 8 Hz 0 1 s 49 8 Hz 0 1 s 47 5 Hz 4 s 81 S2 51 5 Hz 0 1 s 51 5...

Страница 26: ...appearance and structural parts of the device are damaged and check whether the packing list is consistent with the actual ordered product If there are problems with the above inspection items do not...

Страница 27: ...ceptible to rodents and insects Carry out periodic inspections Inspection shall be conducted at least once every six months If any insect or rodent bites are found replace the packaging materials in t...

Страница 28: ...g may cause personal injury When moving the inverter be aware of its weight and keep the balance to pre vent it from tilting or falling Wear proper protective equipment before performing operations on...

Страница 29: ...r circulation The inverter generates noise during operation and is not recommended to be installed in living areas 4 2 2 Carrier Requirements The mounting structure where the inverter is installed mus...

Страница 30: ...Requirements Reserve enough clearance around the inverter to ensure sufficient space for heat dissipation In case of multiple inverters reserve specific clearance between the inverters 4 Mechanical Mo...

Страница 31: ...ary use other auxiliary tools on site table 4 1 Tool specification Goggles Earplugs Dust mask Protective gloves Insulated shoes Utility knife Marker Wrist strap Wire cutter Wire stripper Hydraulic pli...

Страница 32: ...transport tool Do not release the equipment unless it has been firmly secured Improper handling may cause personal injury Arrange an appropriate number of personnel to carry the inverter according to...

Страница 33: ...e the wall mounting bracket to a proper position on the wall Observe the level on the bracket and adjust until the bubble is in the middle position Mark the positions and drill the holes The depth of...

Страница 34: ...24 step 3 Lift the inverter and slide it down along the wall mounting bracket to make sure they match perfectly Use the fastener set to lock the device End 4 Mechanical Mounting User Manual...

Страница 35: ...amaged and all cables are voltage free before performing electrical work Do not close the AC circuit breaker until the electrical connection is complete Damage to the product caused by incorrect wirin...

Страница 36: ...rm normal operation of the inverter Comply with the safety instructions related to PV strings and the regulations re lated to the utility grid The cable colors in figures in this manual are for refere...

Страница 37: ...C A The pin definition of COM2 terminal is shown in the following label figure 5 2 Label of COM2 Terminal table 5 2 Label Description of COM2 Terminal Label Description RSD RSD 1 RSD 2 Reserved NS NS...

Страница 38: ...ard 6 mm 9 mm 4 mm2 6 mm2 2 Ethernet cable CAT 5E outdoor shielded network cable 5 3 mm 7 mm 8 0 2 mm2 3 Meter RS485 cable 1 Shielded twisted pair 5 3 mm 7 mm 2 0 5 1 0 mm2 4 AC cable 2 Outdoor 5 core...

Страница 39: ...ernal protective grounding terminal and the AC side grounding terminal be reliably grounded If the cross sectional area of the grounding cable is less than 10 mm2 for copper wire or 16 mm2 for aluminu...

Страница 40: ...omers step 1 Prepare the cable and OT DT terminal 1 Heat shrink tubing 2 OT DT terminal step 2 Remove the screw on the grounding terminal and fasten the cable with a screwdriver step 3 Apply paint to...

Страница 41: ...0 A AC circuit breakers should be installed on the output side of the inverter and the grid side to ensure safe disconnection from the grid Determine whether an AC circuit breaker with greater overcur...

Страница 42: ...Connection If multiple inverters are connected in parallel to the grid ensure that the total number of par allel inverters does not exceed 5 Otherwise please contact SUNGROW for technical scheme 5 5...

Страница 43: ...clamp and push the terminal into the housing until there is an audible click Observe the terminal assignment Do not connect any phase line to the PE termi nal or PE wire to N terminal Otherwise unrec...

Страница 44: ...all inverter electrical connections are completed step 1 Disconnect the AC circuit breaker and secure it against reconnection step 2 Remove the waterproof lid from the AC terminal step 3 Lift the loc...

Страница 45: ...slightly End 5 5 4 Assembling the AC Connector 15 kW The AC terminal block is on the bottom side of the inverter AC connection is the three phase four wire grid PE connection L1 L2 L3 N and PE step 1...

Страница 46: ...ti core multi strand copper wire cable connect the AC wire head to the cord end terminal hand tight In case of single strand copper wire skip this step step 7 Fix all the wires to the screw type termi...

Страница 47: ...ighten the swivel nut to the housing End 5 5 5 Installing the AC Connector 15 kW High voltage may be present in inverter Ensure all cables are voltage free before electrical connection Do not connect...

Страница 48: ...nsert the AC connector into the AC terminal on the bottom of the inverter until there is an audible sound step 4 Optional Secure the AC connector as shown in the figure below 5 Electrical Connection U...

Страница 49: ...electric board step 6 Make sure all wires are firmly installed via the right torque tool or dragging the cables slightly End 5 6 DC Cable Connection The PV string will generate lethal high voltage whe...

Страница 50: ...itch to OFF and remove the DC connector to adjust the polarity of the strings when the string current is lower than 0 5 A The following requirements about PV string connection must be met Otherwise it...

Страница 51: ...the open circuit voltage limits at different altitudes Before config uring the PV panels need to take this derating curve in consideration under high altitude situation figure 5 4 Open circuit Voltage...

Страница 52: ...3 For some countries such as Australia where the DC protection cover delivered separately need to be installed on site please firstly lead the PV cables through the waterproof terminal on the DC prote...

Страница 53: ...osition step 2 Check the cable connection of the PV string for polarity correctness and ensure that the open circuit voltage in any case does not exceed the inverter input limit of 1 100 V step 3 Conn...

Страница 54: ...chain For details see the quick guide for the WiNet S module Scan the following QR code for the quick guide 5 7 1 Ethernet Communication The WiNet S communication for Ethernet cannot be used simultan...

Страница 55: ...t from the communication module and take out the inner sealing ring step 3 Unscrew the housing from the communication module step 4 Thread the network cable through the swivel nut and gasket Afterward...

Страница 56: ...ve the waterproof lid from the COM1 terminal and install WiNet S step 7 Slightly shake it by hand to determine whether it is installed firmly End 5 7 2 WLAN Communication step 1 Remove the waterproof...

Страница 57: ...tion for Brazil step 1 Remove the waterproof lid from the COM1 terminal step 2 Install the module Slightly shake it by hand to determine whether it is installed firmly as shown below step 3 Refer to t...

Страница 58: ...n The export control functionality has not been tested to AS NZS 4777 2 2020 5 9 1 Assembling the COM Connector step 1 Unscrew the swivel nut from the connector step 2 Take out the terminal block step...

Страница 59: ...per wire skip this step step 6 Plug the wires or terminals into the corresponding terminals as shown in the following figure figure 5 5 A2 B2 connection step 7 Ensure that the wires are securely in pl...

Страница 60: ...9 2 Installing the COM Connector step 1 Remove the waterproof lid from the COM2 connector step 2 Insert the COM connector into COM2 terminal on the bottom of the inverter until there is an audible cli...

Страница 61: ...ction can establish the communication between the inverter and an external device as well as the communication between two inverters in parallel In case of multiple inverters all the inverters can be...

Страница 62: ...he RS485 cable between two devices should be not longer than 10 m The RS485 communication cannot be used simultaneously with COM1 port for WiNet S Refer to the manual of Logger for the communication c...

Страница 63: ...en using a multi core multi strand wire cable connect the wire head to the cord end terminal In case of single strand copper wire skip this step step 6 Plug the wires or terminals into the correspondi...

Страница 64: ...minal plug into the housing until there is an audible click step 8 For RS485 daisy chain Crimp two wires A to a two wire core end terminal and two wires B to another terminal Plug the terminals to A1...

Страница 65: ...he COM Connector step 1 Remove the waterproof lid from the COM2 connector step 2 Insert the COM connector into COM2 terminal on the bottom of the inverter until there is an audible click End User Manu...

Страница 66: ...power supply should comply with related requirements Max voltage 30 V Max current 1 A Refer to section 5 9 1 Assembling the COM Connector for detailed assembling procedure Plug the wires to NO and COM...

Страница 67: ...ug the wires to R and C terminals according the labels on the bottom of the inverter Refer to section 5 10 3 Installing the COM Connector to install the connector 5 13 DI Connection The grid company u...

Страница 68: ...0 None 100 configurable according to need 1 0 0 0 Close S1 100 0 1 0 0 Close S2 60 0 0 1 0 Close S3 30 1 1 0 0 Close S1 and S2 0 disconnect from grid step 1 Unscrew the swivel nut from the connector...

Страница 69: ...he corresponding terminals as shown in the following figure figure 5 10 DI connection step 6 Ensure that the wires are securely in place by slightly pulling them and insert the terminal plug into the...

Страница 70: ...ected the inverters will emergently stop otherwise the inverters will operate normally But if NS Pro tection is enabled on the iSolarCloud refer to NS Protection Passive Valid the inverters will opera...

Страница 71: ...le 6 2 Powering on the System If all of the items mentioned above meet the requirements proceed as follows to start up the inverter for the first time step 1 Turn on the AC circuit breaker between the...

Страница 72: ...d 6 4 Plant Creation Prerequisites The account and password for logging in to iSolarCloud App have been obtained from the distributor installer or SUNGROW The communication device is normally connecte...

Страница 73: ...rface figure 6 2 Plant Creation Settings Parameter Name Description Plant name The name of the plant Plant type The type of the plant which should be set corresponding to the actual plant type Install...

Страница 74: ...place where the plant is located Plant image Take photos of the plant and upload them Feed in tariff The feed in tariff can be set in two ways Enter the feed in tariff directly in the input box Tap Mo...

Страница 75: ...Device and Commissioning to go to corresponding interface step 7 Tap Network Configuration to go to the WLAN connection interface Tap the home net work in the WLAN list enter the password and then ta...

Страница 76: ...ly returns to the commissioning interface after the processing is completed Only the 2 4 GHz working band is supported under the networking mode If the Easyconnect fails please refer to other methods...

Страница 77: ...stralia additionally set the applicable network service provider and then the grid type The image shown here is for reference only Refer to the actual interface for the supported network service provi...

Страница 78: ...ee phase 30 kVA three phase United Energy UE ST 2008 1 10 kVA for single phase 30 kVA for three phase UE ST 2008 2 30 kVA three phase PowerWater Embedded Generation Notice Photovoltaic Systems 2020 SA...

Страница 79: ...sungrow power com Set Country Region to the country region where the inverter is installed Oth erwise the inverter may report a fault step 10 After a plant is successfully created return to the App ho...

Страница 80: ...ish communi cation connection to the inverter via Ethernet connection This manual describes only how to achieve near end maintenance via WLAN direct connection Screenshots in this manual are based on...

Страница 81: ...ters share plants etc The distributor installer can help the end user to create plants manage install or main tain plants and manage users and organizations step 1 Tap REGISTER to enter the registrati...

Страница 82: ...nization can you fill in the corresponding code step 5 Tick Accept privacy protocol and tap Register to finish the registration operation End 7 4 Login 7 4 1 Requirements The following requirements sh...

Страница 83: ...inverter related data information cannot be found unplug and reinsert the Winet S or press the multi function button of the Winet S three times The default account is user and the initial password is...

Страница 84: ...ll send start instructions and the device will start and operate step 7 After initialization settings the App will return automatically to the home page End 7 5 Initial Settings Tap Country Region and...

Страница 85: ...me countries you should initialize parameters according to local grid re quirements For details please refer to the relevant technical documents on http support sungrowpower com 7 6 Function Overview...

Страница 86: ...me Page Description No Name Description 1 Inverter state Present operation state of the inverter 2 Energy flow chart Shows the PV power generation power feed in power etc The line with an arrow indica...

Страница 87: ...etailed information table 7 2 Description of Run Information Item Description PV information Shows voltage and current of every PV string Inverter information Shows basic information such as running s...

Страница 88: ...n of Power Curve Item Description Daily Daily curve that indicates the real time power Month Monthly curve that indicates daily yield and equivalent hours in a month Year Annual curve that indicates m...

Страница 89: ...records Select one of the records in the list and click the record to view the detailed fault info as shown in following figure figure 7 9 Detailed Fault Alarm Information Event Record Tap Event Reco...

Страница 90: ...een as shown in the following figure figure 7 11 More In addition to viewing the WLAN configuration and App software version the More screen supports the following operations Set parameters including...

Страница 91: ...etting The correct system time is very important Wrong system time will directly affect the data logging and power generation value The clock is in 24 hour format Software Version Version information...

Страница 92: ...negative or positive voltage please consult the supplier of PV panels After the PID night recovery function is enabled the fault indicator on the inver ter front panel turns green NS Protection Passi...

Страница 93: ...r Fault Switch for activating deactivating the function of active power soft start after a fault occurs On Off Active Power Soft Start Time after Fault The soft start time required for raising active...

Страница 94: ...eters Feed in Limitation to enter the screen as shown in the following figure figure 7 18 Feed in Limitation table 7 6 Description of Feed in Limitation Parameters Parameter Description Range Installe...

Страница 95: ...Limitation Ratio Feed in Value Inverter Rated Voltage Rated Power of Original Power Gen eration Sys tems Rated Power of Original Power Gen eration Sys tems Installed PV Power 100 100 00 Rated Power of...

Страница 96: ...ctor PF is fixed and the reactive power is regulated by the parameter PF The PF ranges from 0 8 leading to 0 8 lagging Leading the inverter is sourcing reactive power to the grid Lagging the inverter...

Страница 97: ...e curve Curve A C 0 800 to 1 000 Curve B 0 600 to 0 600 QP_K2 Power factor at point P2 on the Q P mode curve QP_K3 Power factor at point P3 on the Q P mode curve QP_ EnterVoltage Voltage for Q P funct...

Страница 98: ...0 QU_V4 Grid voltage limit at point P4 on the Q U mode curve in 100 0 120 0 QU_Q1 Value of Q Sn at point P1 on the Q U mode curve in 60 0 to 0 0 QU_Q2 Value of Q Sn at point P2 on the Q U mode curve...

Страница 99: ...d to download the firmware package to the mobile device in advance step 1 Enable the Mobile data of the mobile device step 2 Open the App enter the account and password on the login screen Tap Login t...

Страница 100: ...p CONFIRM to perform the firmware upgrade step 9 Wait for the file to be uploaded When the upgrade is finished the interface will inform you of the upgrade completion Tap Complete to end the upgrade E...

Страница 101: ...91 figure 7 24 Auto test Result Clear Auto test Fault Tap Clear Auto test Fault CONFIRM to clear the auto test fault User Manual 7 iSolarCloud App...

Страница 102: ...W Unauthorized personnel are not allowed to log in with this account Otherwise SUNGROW shall not be held liable for any damages caused Tap More Settings Protection Parameters Other Parameters to enter...

Страница 103: ...l the capacitors inside the inverter completely discharge step 4 Ensure that the DC cable is current free via a current clamp End 8 2 Dismantling the Inverter Risk of burn injuries and electric shock...

Страница 104: ...conservation End 8 3 Disposal of the Inverter Users take the responsibility for the disposal of the inverter Please scrap the inverter in accordance with relevant local regulations and stand ards to a...

Страница 105: ...tual grid voltage and contact the local electric power company for solutions if the grid voltage is higher than the set value 2 Check whether the protection parameters are appropriately set via the Ap...

Страница 106: ...ted to the correct terminal whether the live wire and the N wire are correctly in place 4 Check whether the AC circuit breaker is connected 5 Contact Sungrow Customer Service if the pre ceding causes...

Страница 107: ...s of reverse polarity If so disconnect the DC switch and adjust the polarity when the string current drops below 0 5 A 2 Contact Sungrow Customer Service if the pre ceding causes are ruled out and the...

Страница 108: ...to code 595 are corresponding to string 17 to string 32 respectively 37 Excessively High Ambient Temperature Generally the inverter will resume operation when the internal or module temperature return...

Страница 109: ...als to ensure a reli able connection 5 Contact Sungrow Customer Service if the pre ceding causes are ruled out and the fault persists 106 Grounding Cable Fault 1 Check whether the AC cable is correctl...

Страница 110: ...nication cable of the meter 3 Contact Sungrow Customer Service if the pre ceding causes are ruled out and the alarm persists 323 Grid Confrontation 1 Check whether the output port is connected to actu...

Страница 111: ...233 432 434 500 513 515 518 635 638 900 901 910 911 996 System Alarm 1 The inverter can continue running 2 Check whether the related wiring and terminal are abnormal check whether there are any for e...

Страница 112: ...re bat teries Close the AC and DC switches in turn 15 minutes later and restart the system 2 If the fault persists please contact Sungrow Power Customer Service 1548 1579 String Current Reflux 1 Check...

Страница 113: ...ntact Sungrow Customer Service 9 2 Maintenance 9 2 1 Maintenance Notices The DC switch can be secured with a lock in the OFF position or a certain angle beyond the OFF position For countries AU and NZ...

Страница 114: ...ive components may cause damage to the device Do not touch the circuit board unnecessarily Observe the regulations to protect against electrostatic and wear an anti static wrist strap 9 2 2 Routine Ma...

Страница 115: ...nal instrument Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter Fan maintenance must be performed by professionals step 1 Refer t...

Страница 116: ...brush or vacuum cleaner to clean the fan If you need to replace the fan use a screwdriver to unscrew the screw at the fan bracket and remove the fan step 8 Install the dust covers and then the fan br...

Страница 117: ...rent 25 A 12 5 A 12 5 A Max DC short circuit current 32 A 16 A 16 A Output AC Nominal AC power 230 V 50 Hz 3000 W 4000 W Max AC output power 3300VA 4400VA Max AC output current 5 1A 6 8A Nominal AC vo...

Страница 118: ...t Weight 18 kg Topology Transformerless Degree of protection IP65 Operating ambient temper ature range 25 to 60 Allowable relative humidity range non condensing 0 100 Max operating altitude 4000 m 200...

Страница 119: ...put power 5000 VA for AU BE DE 5500 VA for others 6000 VA for AU BE DE 6600 VA for others Rated AC output apparent power 5000 VA for AU BE DE 5500 VA for others 6000 VA for AU BE DE 6600 VA for others...

Страница 120: ...ambient temper ature range 25 to 60 Allowable relative humidity range non condensing 0 100 Max operating altitude 4000 m 2000 m derating Cooling method Natural cooling Display LED Communication WLAN...

Страница 121: ...A for AU BE DE 8800 VA for others Rated AC output apparent power 6999 VA for AU 7000 VA for BE DE 7700 VA for others 8000 VA for AU BE DE 8800 VA for others Max AC output current 10 6 A for AU 11 7 A...

Страница 122: ...Allowable relative humidity range non condensing 0 100 Max operating altitude 4000 m 2000 m derating Cooling method Natural cooling Display LED Communication WLAN Ethernet RS485 DI DO DC connection ty...

Страница 123: ...for others Rated AC output apparent power 10000 VA for AU BE DE 11000 VA for others 12000 VA for AU BE DE 13200 VA for others Max AC output current 15 2 A for AU 16 7 A for others 18 2 A for AU 20 0 A...

Страница 124: ...humidity range non condensing 0 100 Max operating altitude 4000 m 2000 m derating Cooling method Natural cooling Display LED Communication WLAN Ethernet RS485 DI DO DC connection type MC4 Max 6 mm2 AC...

Страница 125: ...VA for AU BE DE 18700 VA for others 20000 VA for AU BE DE 22000 VA for others Rated AC output apparent power 15000 VA for AU BE DE 16500 VA for others 17000 VA for AU BE DE 18700 VA for others 20000 V...

Страница 126: ...ogy Transformerless Degree of protection IP65 Operating ambient temper ature range 25 to 60 Allowable relative humidity range non condensing 0 100 Max operating altitude 4000 m 2000 m derating Cooling...

Страница 127: ...rectly installed refitted or used The device operates in harsh conditions beyond those described in this manual The fault or damage is caused by installation repairs modification or disassembly per fo...

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