Radian Series Inverter/Charger GS8048A GS4048A Operator’s Manual
About OutBack Power Technologies OutBack Power Technologies is a leader in advanced energy conversion technology. OutBack products include true sine wave inverter/chargers, maximum power point tracking charge controllers, and system communication components, as well as circuit breakers, batteries, accessories, and assembled systems.
Table of Contents Introduction .........................................................................................................5 Audience ................................................................................................................................................................................. 5 Symbols Used ........................................................................................................................................................................
Table of Contents Parallel Stacking (Dual-Stack and Larger) ............................................................................................................................................. 37 Power Save ..................................................................................................................................................................................................... 38 Auxiliary Terminals ..........................................................................
Table of Contents List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Summary of Input Modes .......................................................................................................... 20 Charge Currents for Radian Models ....................................................................................... 27 Offset Interaction with AC Source .........................................
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Introduction Audience This manual provides instructions for setup and operation of the product. It does not cover installation. The manual is intended to be used by anyone required to operate the Radian Series Inverter/Charger. Operators must be familiar with all the safety regulations pertaining to operating power equipment of this type as required by local code. Operators are advised to have basic electrical knowledge and a complete understanding of this equipment’s features and functions.
Introduction Welcome to OutBack Power Technologies Thank you for purchasing the OutBack Radian Series Inverter/Charger. It is designed to offer a complete power conversion system between batteries and AC power. As part of an OutBack Grid/Hybrid™ system, it can provide off-grid power, grid backup power, or grid-interactive service which sells excess renewable energy back to the utility.
Introduction Inverter Functions Battery-to-AC inverting which delivers power to run backup loads and other functions ∼ Provides split-phase output ∼ Adjustable range of output voltage ∼ Settable nominal output frequency AC-to-battery charging (OutBack systems are battery-based) ∼ Accepts a wide variety of AC sources ∼ Requires split-phase input Uses battery energy stored from renewable resources ∼ Can utilize stored energy from many sources (PV arrays, wind turbines, etc.
Introduction Inverter Controls The Radian inverter has no external controls. It can operate normally without an external control or interface. Basic modes and settings are pre-programmed at the factory. (See page 65 for default settings.) However, certain external devices can be used to operate or program the Radian. On/Off Switch The inverter can be equipped with a switch to turn it on and off. This switch is not sold as an inverter accessory; a common toggle switch can be used.
Commissioning Functional Test WARNING: Shock Hazard and Equipment Damage The inverter cover must be removed to perform these tests. The components are close together and carry hazardous voltages. Use appropriate care to avoid the risk of electric shock or equipment damage. Pre-startup Procedures 1. Ensure all DC and AC overcurrent devices are opened, disconnected, or turned off. 2. Double-check all wiring connections. 3. Confirm that the total load does not exceed the inverter’s wattage.
Commissioning Metal pads are located at these locations. In commissioning, AC voltages can be measured at this series of test points. Figure 3 AC Test Points 2. If a system display is present, perform all programming for all functions. These functions may include AC input modes, AC output voltage, input current limits, battery charging, generator starting, and others. AC input modes are described beginning on page 13 and are summarized on page 20.
Commissioning 4. Using a DVM or voltmeter, verify 120 Vac (or appropriate voltage) between the master inverter’s “L1” and “N” OUT terminals, and between the “L2” and “N” OUT terminals. (See Figure 3 for AC test points.) The inverter is working correctly if the AC output reads within 10% of 120 Vac or the programmed output voltage. If necessary, confirm appropriate voltages from one unit to the next. 5.
Commissioning Firmware Updates IMPORTANT: All inverters will shut down during firmware updates. If loads need to be run while updating the firmware, bypass the inverter with a maintenance bypass switch. Communication cables must remain connected and DC power must remain on. Interrupted communication will cause the update to fail and the inverter(s) may not work afterward. Inverters automatically update one at a time beginning with Port 1. Each requires about 5 minutes.
Operation Inverter Functionality The inverter is capable of being used for many applications. Some of the inverter’s operations occur automatically. Others are conditional or must be enabled manually before they will operate. Most of the inverter’s individual operations and functions can be programmed using the system display. This allows customization or fine tuning of the inverter’s performance. The Radian inverter has two sets of input connections, which are labeled Grid and Gen.
Operation requirements of the Radian inverter and the selected input mode. If necessary, the Gen terminals can accept grid power. The opposite is also true. However, if using the Gen Alert or AGS functions, the generator must use the Gen terminals. See page 41 (Gen Alert) and page 45 (AGS). When multiple inverters are stacked together in parallel, the master inverter’s input mode is imposed on all slaves. (See the stacking section on page 35.
Operation BENEFITS: Large inverter loads can be powered while staying connected to the AC input, even if the input is limited. The added battery power prevents overload of the input source, but the batteries are not in constant use. The Radian inverter will offset the loads with excess renewable energy if it is available from the batteries. See page 35 for more information. NOTES: IMPORTANT: The inverter will draw energy from the batteries when the loads exceed the appropriate AC Limit.
Operation BENEFITS: Excess power is returned to the utility grid. The inverter will offset the loads with excess renewable energy if it is available from the batteries. If the excess energy is greater than the AC demand (the load size), the excess will be sold to the grid. Due to varying requirements in different locations around the world, the grid-interactive settings are adjustable. These adjustments are made in the Grid Interface Protection menu.
Operation ∼ Before operating in Grid Tied mode, contact the utility company that provides power to the installation. They can provide information regarding the rules that must be followed in order to export power back to the utility. The items in the following list are the selectable Grid Interface Protection options. The utility company may need to review these items to make certain their standards are met. The utility may simply name a standard to be followed, as with UL1741 for the United States.
Operation Mini Grid In Mini Grid mode, the Radian inverter automatically rejects an AC source and runs solely from battery (and renewable) energy. The inverter only connects to the AC source (usually the utility grid) when the batteries run too low. The Radian inverter runs on battery-supplied power for as long as the batteries can be sustained. It is expected that the batteries will also be charged from renewable sources such as PV.
Operation ∼ HBX can be combined with the settings of any other input mode (Generator, UPS, etc.). The Mini Grid input mode is limited to its own settings and does not have access to certain functions of other modes. ∼ See page 45 for more information on HBX, Grid Use Time, and Load Grid Transfer. Grid Zero In Grid Zero mode, the Radian inverter runs primarily from battery (and renewable) energy while remaining connected to an AC source.
Operation Table 1 Mode Summary Summary of Input Modes Benefits Generator Accepts power Can use AC that may be unusable in other modes from an irregular or Can charge even with a low-quality poor generator or AC source low-quality AC source Support GridTied UPS Backup Mini Grid Grid Zero 20 Cautions Intended Charger Will pass irregular or Source: Generator Loads: Nonsensitive devices Performs three-stage charge and goes silent as specified by settings.
Operation Description of Inverter Operations The items in this section are operations common to all Radian inverters. These are used in most or all of the input modes described in the preceding section. Some of the items in this section are functions which can be manually selected, enabled, or customized. Other items are general topics or applications for the inverter. These items may not have their own menus, but their activity can still be influenced or optimized by changing certain settings.
Operation The following items will affect the inverter’s operation. These are only used when the inverter is generating AC power on its own. Low Battery Cut-Out: This function prevents the inverter from draining the batteries completely. When the DC voltage drops below a specified level for 5 minutes, the inverter will stop functioning. The MATE3 will give a Low Battery V error. This is one of the error messages described on page 55. It appears as an event on the MATE3 system display.
Operation Search An automated search circuit is available to minimize the power draw when no loads are present. When enabled, the inverter does not always deliver full output. The output is reduced to brief pulses with a delay between them. These pulses are sent down the output lines to see if a resistance is present. Basically, the pulses “search” for a load. If a load is detected on the output, the inverter’s output increases to full voltage so that it can power the load.
Operation AC Current Settings A A A The AC current settings, Grid Input AC Limit and Gen Input AC Limit, control the amount of current that the inverter draws from the source(s). When using either of the Radian’s AC inputs, the appropriate setting limits the input. Adjust these settings to match the input circuit breakers. The adjustment is meant to protect a generator or source that cannot supply enough current for both charging and loads.
Operation Gen AC Input Mode and Limits). The settings are titled Voltage Limit Lower and Upper. When adjusted, they apply equally to L1 and L2. There can be side effects to changing the range of allowed voltages. Each of the AC inputs has a settable Connect Delay. This is intended as a warmup period which allows an input source to stabilize before connection. ∼ The default setting for the Grid input is 0.2 minutes (12 seconds). ∼ The default setting for the Gen input is 0.5 minutes (30 seconds).
Operation The relay contacts are limited to 50 amps per phase or leg. The continuous loads on that output should never exceed this number. When connected to an AC source, the Radian inverter cannot limit the load current. An overload condition is possible. The inverter does not filter or actively condition the AC source. The voltage and power quality received by the output loads is the same as that of the source.
Operation Battery Charging IMPORTANT: Battery charger settings need to be correct for a given battery type. Always follow battery manufacturer recommendations. Making incorrect settings, or leaving them at factory default settings, may cause the batteries to be undercharged or overcharged. Charge Current Batteries or battery banks usually have a recommended limit on the maximum current used for charging. Often this is calculated as a percentage or fraction of the battery capacity, represented by “C”.
Operation between steps are marked with vertical dotted lines. A circle indicates that the inverter has begun charging to a new voltage setting. A square indicates that the inverter has reached the setting (a horizontal dotted line). A triangle indicates that the inverter has stopped charging and is no longer using the previous set point. (The charging may have stopped for any of several reasons.) The battery voltage must drop to one of several low set points before the inverter resumes charging.
Operation Charging Steps The following items describe the operation and intended use for each individual charging step as shown in the graphs. Note that some charging cycles may not follow this exact sequence. These include cycles which were previously interrupted, and also customized charging. Each step describes how to defeat or customize the step if specialized charging is required. See page 31 for a description of multiple cycles when the charger is restarted after completion.
Operation battery voltage (up to the maximum Absorption limit). The counter adds more time to the Absorption period whenever the battery voltage decreases below this setting. (See page 31 for more information on how the timer works.) To skip this step: Setting Absorb Time to a very short duration will cause the charger to spend minimal time in Absorption once the Bulk stage is complete.
Operation NOTE: The Float timer begins running any time the battery voltage exceeds the Float Voltage set point. This usually means that it begins running during the Bulk stage, once the battery voltage rises above that level. Often the timer will expire before the bulk and absorption stages are complete. If this happens, the charger will not enter Float but will go directly to Silent. The charger only spends time in Float stage if the timer is still running. Time limit: Float Time setting.
Operation The remaining charging steps will proceed as described on the previous pages. Cycle 1 Voltage Absorption (c.v.) Absorption Set Point Float Set Point AC Loss Float (c.c.) Float Timer (c.v.) Re-Float Set Point Re-Bulk Set Point Cycle 2 Silent AC Loss Float (c.c.) Absorption (c.v.) AC Loss Absorption (c.v.) Bulk (c.c.) Bulk (c.c.) Silent Float Timer (c.v.
Operation When Cycle 4 begins, the charger proceeds through the Bulk stage and then the Absorption stage. (The space between the first and second set of barred arrows is the same.) The duration of Absorption is equal to Absorb Time, which is the maximum time allowed. At the end of Cycle 4, the Float Time has expired, so the charger goes Silent. Equalization Equalization is a controlled overcharge that is part of regular battery maintenance.
Operation The Radian inverter, when equipped with the Remote Temperature Sensor (RTS) will compensate for changes in temperature. The RTS is attached to a single battery near the center of the bank, to achieve a representative temperature. The Radian inverter has a designated port for installing the RTS. If installed in a multiple-inverter system, only a single RTS is necessary. It must be plugged into the master inverter and will automatically control the charging of all slaves and all charge controllers.
Operation Offset This operation is designed to use excess battery energy to power the loads when an AC source is present. This allows the system to take advantage of renewable energy sources, in effect “offsetting” dependence on the AC source. A renewable energy source will raise the battery voltage as it charges the batteries.
Operation Multiple-Inverter Installations (Stacking) Multiple inverters in a single system can support larger loads than a single inverter can handle. Installing inverters in this configuration is called “stacking”. Stacking inverters refers to how they are wired within the system and then programmed to coordinate activity. Stacking allows all units to work together as one system. The GS8048A and GS4048A models can stack up to ten units in parallel for increased capacity.
Operation without being stacked as long as it is wired independently. The GS8048A can be parallel-stacked with the GS4048A. Although stacking allows greater capacity, the loads, wiring, and overcurrent devices must still be sized appropriately. Additional terminations or bus bars may be required. Overloading may cause circuit breakers to open or inverters to shut down.
Operation Power Save Each inverter consumes approximately 30 watts of idle power while it remains on, even if it is not actively inverting or charging. The Power Save function allows the option to put part of a parallel system into a quiescent state known as Silent mode. This mode minimizes the idle consumption. The inverters will come on again when the loads require power. (The term “Silent” is also used in an unrelated context during battery charging. See page 30.
Operation depending on the inverter’s stacking designation. Master Power Save Level appears on an inverter which is set as master (the default setting). In a stacked system, this selection should only appear on the inverter using Port 1 of the communications manager. The range of rank numbers is 0 to 31. The default value is 0. The master is normally left at this value. Slave Power Save Level appears on an inverter which is set as slave. The range of rank numbers is 1 to 31.
Operation Additional Notes for the Radian GS8048A The GS8048A has two modules. The modules are controlled individually. The Power Save function will activate one module at a time, making an additional 4 kW of power available for every load increase of approximately 2.5 kW. Figure 11 shows a system of four GS8048A inverters (the master and three slaves) in a parallel system with a common load bus. The labels at the top indicate the ranking of each unit.
Operation Table 4 Changing Master Power Save Levels (GS8048A) Master Slave 1 Slave 2 Slave 3 Power Save Module Module 2 Power Save Module Module 4 Power Save Module Module 6 Power Save Module Module 0 On Off 1 Off Off 2 Off Off 3 Off Off 1 On On 1 Off Off 2 Off Off 3 Off Off 2 On On 1 On Off 2 Off Off 3 Off Off 3 On On 1 On On 2 Off Off 3 Off Off 1 3 5 7 8 Auxiliary Terminals The Radian inverter has two sets of terminals which can res
Operation output voltage drops below a specific AC voltage for more than 3 seconds. This voltage limit is 30 volts below the setting of the inverter’s output voltage. For the Radian’s default output voltage of 240 Vac, the limit is 210 Vac, or 105 Vac if output L1 or L2 decrease in voltage independently. (See page 67.) The limit is not otherwise settable. ∼ Load Shed will also turn off if the input current exceeds the Input AC Limit setting while the inverter is using an AC source.
Operation Cool Fan activates the AUX output when the inverter reaches a high internal temperature. It is intended to trigger a small external fan for additional cooling. See the Warning Troubleshooting table on page 56 for a description of the fan criteria. ∼ DC Divert activates the AUX output to divert (or “dump”) excess renewable energy to a DC load, such as a resistor, a heater, or a fuel cell. This prevents overcharging of the batteries.
Operation Note that even if every function in the menu is set to Off, external programming from other devices may still activate the AUX output. An example is the system display’s AGS function (see page 45). The AUX functions are summarized in Table 5.
Operation System Display-Based Functions A system display such as the OutBack MATE3 can provide functions not available in the inverter. These functions are summarized here to provide a better idea of overall system capabilities. The system display must be present for these functions to operate. If a function is set up (or already in operation) but the system display is removed, the function will not operate.
Operation HBX mode has similar priorities to the Mini Grid input mode contained within the Radian inverter. Either mode may achieve similar results, but they are not identical. See page 18 for the advantages and disadvantages of each mode. Grid Use Time The inverter system is capable of connecting to, or disconnecting from, the utility grid based on time of day. It can also be programmed to connect at different times on weekdays and on weekends.
Metering MATE3 Screens The MATE3 system display can monitor the GS inverter and other networked OutBack devices. From the Home screen, the Inverter “soft” key accesses the screens for monitoring the inverter. Inverter Soft Key Figure 12 Home Screen Inverter Screens The Inverter soft key opens a series of screens showing the inverter operating mode, battery voltage, and status of several AC operations. The first screen displays AC information on the inverter’s L1 input and output.
Metering Charge displays the kilowatts and AC amperage consumed for the inverter to charge the battery bank. This line also shows the present charging stage. Load displays kilowatts and AC amperage consumed by devices on the inverter’s output. It can be the same as Invert. Buy displays the kilowatts and AC amperage brought into the inverter’s input for both charging and loads. This is usually a total of Charge and Load. Battery displays the uncompensated battery voltage.
Troubleshooting Basic Troubleshooting Table 6 is organized in order of common symptoms, with a series of possible causes. Each cause also shows possible troubleshooting remedies, including system display checks where appropriate. - Metal pads are located at these locations. In troubleshooting, AC voltages can be measured at this series of test points. Figure 15 AC Test Points WARNING: Shock Hazard During an error shutdown, the inverter’s output terminals are not live.
Troubleshooting Table 6 Symptom One or more units have no output but others do (in multiinverter system). Will not connect to the AC source. Troubleshooting Possible Cause Possible Remedy Inverter set to Search (Search mode). MATE3 system display only: If constant power is required, set to On with the INVERTER hot key. (If this setting was intentional, then no action is required.) Unit is slave and is in Power Save mode.
Troubleshooting Table 6 Symptom Possible Cause Possible Remedy Conflicting AC sources. Priority input is interfering with secondary input. If AC is present on the priority input, the inverter will not connect to AC on the second input. This is true even if the first input is not connected for other reasons (programming, low power quality). Charge complete or nearly complete. Check the DC voltage and charging stage using the MATE3, if present. Confirm with DC voltmeter.
Troubleshooting Table 6 Symptom Possible Cause Troubleshooting Possible Remedy AC source voltage is driven high When the inverter senses a rise in grid voltage while selling, it when the inverter sells large reduces the sell current, to avoid forcing the voltage to amounts of power. unacceptable levels. Check AC input voltage while selling. The inverter may be operating correctly. Reduced power sold to the utility grid. High temperature.
Troubleshooting Table 6 Symptom Unit reads AC input, even though no source is present. Inverter clicks repeatedly. AC output voltage rises or drops to unusual levels with every click. Inverter hums loudly. System display may show messages for high battery voltage, low battery voltage, or backfeed error. Troubleshooting Possible Cause Possible Remedy Loads sensitive to inverter’s transfer time. UPS mode not in use on the appropriate input.
Troubleshooting Table 6 Symptom Generator, external fan, etc. fails to start when signal is provided by AUX output. Troubleshooting Possible Cause Possible Remedy AUX output is not connected. Test the generator or device to confirm functionality. Test the appropriate AUX terminals with a DVM. (If the RELAY AUX terminals are in use, test for continuity. If the 12V AUX terminals are in use, test for 12 Vdc.
Troubleshooting Error Messages An error is caused by a critical fault. In most cases when this occurs, the unit will shut down. The MATE3 system display will show an event and a specific error message. This screen is viewed using the MATE3 Home screen’s soft keys. (See the MATE3 manual for more instructions.) One or more messages will display Y (yes). If a message says N (no), it is not the cause of the error.
Troubleshooting Warning Messages A warning message is caused by a non-critical fault. When this occurs, the unit will not shut down, but the MATE3 system display will show an event and a specific warning message. This screen is viewed using the MATE3 Home screen’s soft keys. (See the MATE3 manual for more instructions.) One or more messages will display Y (yes). If a message says N (no), it is not the cause of the warning.
Troubleshooting Table 8 Warning Troubleshooting Message Definition Possible Remedy Fan Failure The inverter’s internal cooling fan is not operating properly. Lack of cooling may result in derated inverter output wattage. Turn the battery disconnect off, and then on, to determine if the fan self-tests. After this test, contact OutBack Technical Support for the next step. (The next step will depend on the results of the test.
Troubleshooting Disconnect Messages Disconnect messages explain why the inverter has disconnected from an AC source after previously being connected. The unit returns to inverting mode if turned on. This screen is viewed using the AC INPUT hot key on the MATE3. One or more messages will display Y (yes). If a message says N (no), it is not the cause of the disconnection. The MATE3 system display may generate a concurrent event and warning message following the disconnection. (See page 56.
Troubleshooting Sell Status Sell Status messages describe conditions relating to the inverter’s grid-interactive mode. This screen is viewed using the MATE3 Home screen’s soft keys. (See the MATE3 manual for more instructions.) One or more messages will display Y (yes). If a message says N (no), it is not the cause of the disconnection. If the inverter has stopped selling or charging unexpectedly, this screen may identify the reason.
Troubleshooting NOTES: 60 900-0161-01-00 Rev A
Specifications Electrical Specifications NOTE: Items qualified with “default” can be manually changed using the system display. Table 12 Electrical Specifications for Radian Models Specification GS8048A GS4048A Continuous Output Power at 25°C 8000 VA 4000 VA Continuous AC Output Current at 25°C 33.3 Aac 16.
Specifications Table 12 Electrical Specifications for Radian Models Specification GS8048A GS4048A DC Input Power (continuous) 9.5 kVA 4.8 kVA DC Input Maximum Current (continuous full power) 200 Adc 100 Adc DC Input Maximum Current (surge) 424.2 Adc 212.1 Adc DC Input Maximum Current (short-circuit) 8975 Adc 4488 Adc Battery Charger Maximum AC Input 30 Aac at 240 Vac 15 Aac at 240 Vac Battery Charger Maximum DC Output 115 Adc 57.
Specifications Temperature Derating All Radian inverters can deliver their full rated wattage at temperatures up to 25°C (77°F). The Radian maximum wattage is rated less in higher temperatures. Above 25°C, the GS8048A is derated by a factor of 80 VA for every increase of 1°C. The GS4048A is derated by 40 VA per 1°C. Figure 16 is a graph of wattage over temperature, showing the decrease in rated wattage with increased temperature.
Specifications FCC Information to the User This equipment has been tested and found to comply with the limits for a Class B digital device when powered by a DC source, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
Specifications The Grid Interface Protection settings are adjustable. However, this is only available to operators with installer-level access. The reason for this limitation is that there are firm rules concerning the acceptable voltage range, frequency range, clearance time during power loss, and reconnect delay when exporting power back to the utility. The rules differ in different locations around the world, although generally it is expected that the settings cannot be altered by the end user.
Specifications Table 16 Radian Inverter Settings Item Default Field Input Mode Gen AC Input Mode and Limits Low Battery Battery Charger Battery Equalize 108 Vac 85 Vac 110 Vac (Voltage Limit) Upper 140Vac 125 Vac 140 Vac Transfer Delay 1.0 second 0.12 seconds 4.0 seconds Connect Delay 0.5 minutes 0.2 minutes 25.0 minutes If Mini Grid mode is selected: Connect to Grid 48.0 Vdc 44.0 Vdc 64.
Specifications Table 16 Radian Inverter Settings Item Default Minimum Maximum 56.0 Vdc 0.5 minutes 56.0 Vdc 0.5 minutes 56.0 Vdc 0.5 minutes 44.0 Vdc 0.5 minutes 56.0 Vdc 0.5 minutes 44.0 Vdc 0.5 minutes 40.0 Vdc 0.1 minutes 40.0 Vdc 0.1 minutes 40.0 Vdc 0.1 minutes 40.0 Vdc 0.1 minutes 40.0 Vdc 0.1 minutes 40.0 Vdc 0.1 minutes 72.0 Vdc 25.0 minutes 72.0 Vdc 25.0 minutes 72.0 Vdc 25.0 minutes 56.0 Vdc 25.0 minutes 72.0 Vdc 25.0 minutes 56.0 Vdc 25.
Specifications Definitions The following is a list of initials, terms, and definitions used in conjunction with this product. Table 17 Terms and Definitions Term Definition 12V AUX Auxiliary connection that supplies 12 Vdc to control external devices AC Alternating Current; refers to voltage produced by the inverter, utility grid, or generator AGS Advanced Generator Start CSA Canadian Standards Association; establishes Canadian national standards and the Canadian Electrical Code, including C22.
Index 12V AUX ................................................................................. 41 Silent .................................................................................. 30 Steps............................................................................ 29, 31 Commissioning ...................................................................... 9 Cool Fan .................................................................................. 43 A D Absorption Stage ........................
Index Grid-Interactive ............................................................ 15, 68 GT Limits ................................................................................ 43 R High Battery Cut-Out ........................................................ 22 High Battery Transfer (HBX) ..................................... 18, 45 Ranks, Power Save .............................................................. 38 Regulatory .........................................................................
Index V W Vent Fan Control ................................................................. 42 Warning Symbol .................................................................... 5 Warnings ................................................................................ 56 Website ............................................................................
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