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Installation Manual
H3C S9500 Series Routing Switches

Chapter 3 Installing the Switch

3-1

Chapter 3 Installing the Switch

The S9500 series are designed for indoor applications.

Warning:

Do not touch any exposed wires, terminals or any parts labelled with a

high-voltage hazard warning to avoid bodily injury.

3.1 Installation Flow

Start

Confirm installation preparation

Confirm installation position

Mount the switch in a rack

Install the switch on a workbench

Install a PSU

Install boards

Install PoE power supply

(optional)

Connect the PGND wire

Finish

Verify the installation

Connect interface cables

Figure 3-1

Installation flow

3.2 Confirming Installation Preparation

Make sure that you have read Chapter 2 Preparing for the Installation

carefully.

Summary of Contents for S9505 SRP

Page 1: ...H3C S9500 Series Routing Switches Installation Manual Hangzhou H3C Technologies Co Ltd http www h3c com Manual Version T2 08048H 20071025 C 2 03 Product Version S9500 CMW520 R2127...

Page 2: ...InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co Ltd All other trademarks that may be mentioned in this manual are the property of their respective owners Notice The information i...

Page 3: ...nual Organization H3C S9500 Series Routing Switches Installation Manual is organized as follows Chapter Contents 1 Product Overview Introduces the appearance architecture and system features of the S9...

Page 4: ...re grouped in square brackets and separated by vertical bars One or none is selected x y Alternative items are grouped in braces and separated by vertical bars A minimum of one or a maximum of all can...

Page 5: ...ader be careful Improper operation may cause data loss or damage to equipment Note Means a complementary description Environmental Protection This product has been designed to comply with the requirem...

Page 6: ...Overview 1 1 1 1 Introduction 1 1 1 2 Physical Structure 1 1 1 2 1 Chassis and Slots 1 2 1 2 2 Backplane 1 5 1 2 3 Power System 1 6 1 2 4 PoE Power Supply 1 8 1 2 5 Fan Tray 1 10 1 3 Switching and Rou...

Page 7: ...rts 20 10GE ports 240 FE electrical ports or 100 FE optical ports z S9508 This model provides a switching capacity of up to 960 Gbps It allows for the concurrent wire speed forwarding on 384 GE ports...

Page 8: ...PSUs are hot swappable 1 2 1 Chassis and Slots I S9505 1 SRPU slots 2 LPU slots 3 Cable management bracket 4 PSUs 5 PoE power entry module 6 Fan tray Figure 1 1 Front view of the S9505 z The S9505 cha...

Page 9: ...1 2 Front view of the S9508 z The S9508 chassis provides ten slots in its board area The middle two accommodate SRPU modules the remaining eight accommodate LPUs service boards z At the bottom of the...

Page 10: ...the remaining eight accommodate LPU service boards z At the bottom of the chassis is the power area that contains one PoE power entry module and two PSUs The switch supports both AC and DC power inpu...

Page 11: ...Us service boards z At the bottom of the chassis is the power area that contains one PoE entry module and two PSUs The switch supports both AC and DC power inputs So you can select AC or DC PSUs as ne...

Page 12: ...3 Power System Note z The S9500 series support both AC and DC power inputs So you can choose AC or DC PSUs as needed z The S9500 series support 1 1 power supply redundancy z The PSUs of the S9500 seri...

Page 13: ...EPS3500 A enclosure 1 sub PSU no redundancy 1 NEPS3500 A enclosure 2 sub PSU 1 1 redundancy 1200 W 90 V to 180 V 1800 W 180 V to 264 V 1 NEPS3500 A enclosure 2 sub PSU no redundancy 2 NEPS3500 A enclo...

Page 14: ...le z The S9500 series can supply power to remote PDs through Ethernet electrical ports on the LPUs Each LPU can simultaneously supply power to up to 48 PDs with the maximum distance of 100 m 328 1 fee...

Page 15: ...controller One Rectifiers NP2500UAC Two NP2500UACs required one redundant NP2500UAC optional NP2500UAC is hot swappable AC accessories Three AC inputs and switches Three AC voltage detection circuits...

Page 16: ...Green ON OFF PSU shutdown or PSU running trouble Alarm LED ALM Red OFF ON Loss of AC input power under voltage or over voltage input over voltage output output short circuit or PSU fault 1 2 5 Fan Tra...

Page 17: ...ing normally ALM Red ON The fan tray is faulty 1 3 Switching and Routing Processing Unit SRPUs serve as the core of the S9500 series They mainly have the following functions z Route calculation and fo...

Page 18: ...the SRPU is applicable to the switch SRP2N s forwarding capacity is twice the SRP1N s 1 4 Line Processing Unit The following LPUs are available Table 1 8 LPUs available LPU Suffix User interface LSB1F...

Page 19: ...s LSB1GT48L DB0 48 auto sensing 10 100 1000 Mbps RJ 45 electrical ports wire speed LSB1P4G8 CA0 8 1000 Mbps SFP LC optical ports and 4 OC 3c SFP LC POS optical ports LSB1GT8P CA0 4 1000 Mbps SFP LC op...

Page 20: ...tailed specifications for the SRPUs LPUs and service boards visit the website at www h3c com 1 6 System Specifications The following table summarizes the physical specifications of the S9500 series Ta...

Page 21: ...1N 7 LSB1SRP2N 5 LSB1SRP2N 7 LSB1SRP1N4 LSB1SRP1N7 LSB1SRP2N4 LSB1SRP2N7 Number of LPU slots 5 8 8 12 User interface z 10 100 1000BASE TX RJ45 z 10 100BASE TX RJ45 z 1000BASE X SFP LC z 100BASE FX SFP...

Page 22: ...g Installation Site 2 3 2 2 1 Temperature Requirements 2 3 2 2 2 Humidity Requirements 2 3 2 2 3 Cleanness Requirements 2 4 2 2 4 EMS Requirements 2 5 2 2 5 Grounding Requirements 2 5 2 2 6 Power Supp...

Page 23: ...rea such as ungrounded power extension cables missing safety grounds and moist floors z Locate the emergency power off switch in the room before installation Shut the power off at once in case acciden...

Page 24: ...external cables including power cords before moving the chassis z Do not move the switch alone z Move the switch slowly and stably Keep in step with your partner and balance your bodies when moving t...

Page 25: ...mperature requirements Temperature Range Operating temperature 0 C to 45 C 32 F to 113 F Storage temperature 40 C to 70 C 40 F to 158 F The higher the temperature the greater the damage it will do to...

Page 26: ...ult in the poor contact of the connector or metal contact point This happens more frequently when indoor relative humidity is low which will not only shorten the service life of the switch but also ca...

Page 27: ...und of the switch from the grounding device of the power supply equipment or lightning protection grounding device as far as possible z Keep the switch far away from the radio launcher radar launcher...

Page 28: ...Two 1800W sub PSUs 30 A Table 2 6 Specifications for DC PSUs Specifications Item NEPS1200 D NEPS2000 D NEPS3500 D Model S9505 S9508 S9512 S9508 S9512 Rated voltage range 48 VDC to 60 VDC 48 VDC to 60...

Page 29: ...ter high N68 cabinet 600 800 1800 mm or 23 6 31 5 70 9 in z N68 22 model 2 2 meter high N68 cabinet 600 800 2200 mm or 23 6 31 5 86 7 in Note For the procedure of installing and remodeling an N68 cabi...

Page 30: ...ast 15 2 cm 6 0 in is required between the side panels of the cabinet and the switch If the switch is to be installed in a closed cabinet make sure that the cabinet has a good ventilation system 2 3 2...

Page 31: ...e bottom of a power distribution box Figure 2 4 Terminal block structure diagram The terminal block has 21 terminals to connect power cords seven grey terminals seven blue terminals and seven yellow g...

Page 32: ...sectional area 16 mm 2 Input Maximum current maximum crimping area 101A 25 mm 2 Output seven loop outputs II Power Distribution Box Appearance Figure 2 5 Front view of the power distribution box Figur...

Page 33: ...inet power distribution box to the system power supply and PoE power supply The three wires of each cable should be respectively connected to the ports L N and PE of the power distribution box Make su...

Page 34: ...S9505 chassis 5 PoE power entry module 6 S9505 chassis 7 System power input 8 Interface area on external PoE power supply panel 9 External PoE power supply 10 PoE AC socket 11 17 No 1 to No 7 power ca...

Page 35: ...blocks are DC input terminal blocks Next to them are two air switches each of which has a through current capacity of 63A On the rightmost side are 9 terminal blocks 6 of which are BGND terminal block...

Page 36: ...inal block components Table 2 9 illustrates terminal block components Table 2 9 Terminal block components NO Name Quantity 1 End bracket 2 2 Cross connector 3 3 Marker 6 4 Terminal 11 5 Clapboard 7 6...

Page 37: ...e the air switches to supply power to DC power modules by connecting the lower terminals of the air switches to DC power input terminals and supply voltages to DC power Refer to Figure 2 9 for detail...

Page 38: ...uble ring spanner 10 12 or open ended spanner 10 12 Small tools Sharp nose pliers diagonal pliers vices hand held electric drill file handsaw crowbar rubber hammer General tools Auxiliary tools Brush...

Page 39: ...5 1 In a common grounding environment 3 5 3 5 2 In other Grounding Environments 3 5 3 6 Installing a PSU 3 9 3 6 1 Installation Preparation 3 9 3 6 2 Installation Procedure 3 9 3 6 3 Connecting Power...

Page 40: ...warning to avoid bodily injury 3 1 Installation Flow Start Confirm installation preparation Confirm installation position Mount the switch in a rack Install the switch on a workbench Install a PSU Ins...

Page 41: ...a place near the cabinet 3 3 2 Installing the Cable Management Bracket and Rack Mounting Ears For your convenience a cable management bracket is shipped with the S9500 series Take the following steps...

Page 42: ...he supports and slide it into the cabinet until the rack mounting ears touch against the front square holed columns 2 Fix the rack mounting ears onto the square holed columns with screws Figure 3 3 In...

Page 43: ...n a clean and stable workbench 3 4 1 Preparations z Make sure that the workbench is sturdy enough to bear the weight of the switch and cables z Make sure that the workbench is flat and well grounded 3...

Page 44: ...e switch on the grounding screw 3 Insert the grounding screw into the grounding hole and screw it down 4 Connect the other end of the PGND wire to the ground bar of the switch as shown in Figure 3 4 F...

Page 45: ...attach one end of the yellow green PGND wire of the switch to a grounding bolt of the ground bar and fasten the captive screws Caution Note that neither the fire hydrant nor lightning rod of a buildin...

Page 46: ...ngle iron steel pipe and the joint should be processed against eroding For the S9500 series the grounding screw is on the rear panel Connect it as illustrated in Figure 3 5 3 4 5 1 2 3 4 5 1 2 1 Rear...

Page 47: ...1 2 3 5 4 3 5 4 1 2 1 Front panel of the switch 2 AC power input 3 3 core AC power cord 4 Transformer 5 Protection earth PE wire Figure 3 7 Ground the switch through the AC PE wire z If no ground bar...

Page 48: ...switch through the PGND strip of the PDF 3 6 Installing a PSU 3 6 1 Installation Preparation z Wear an ESD preventive wrist strap and verify the ESD preventive wrist strap is properly grounded z If th...

Page 49: ...g the guide rails until it snaps into the backplane Figure 3 9 Install an AC PSU 3 Fasten the captive screws on both sides of the PSU with a Philips screwdriver and install the removed air filter cove...

Page 50: ...e the sub PSU smoothly along the guide rails until it snaps into the backplane 3 Push the handle upward so that the sub PSU moves further inside about 1 cm 0 39 in until the handle locks the sub PSU i...

Page 51: ...ut LED 3 Output LED 4 Fail LED 5 Power switch 6 PSU handle 7 AC power cord Figure 3 11 NEPS1200 A appearance 1 Connector retention clamp 2 Input LED 3 Output LED 4 Fail LED 5 Power switch 6 PSU handle...

Page 52: ...with screws A plastic cover plate is installed in front of the terminal block for the sake of connection reliability Caution z Completely power off the switch before connecting the DC power cord z Bef...

Page 53: ...and fasten the corresponding fixing screw Connect the other end to the RTN terminal of the power source 4 Connect one end of the cable with PGND OT terminals yellow green to the PGND terminal on the...

Page 54: ...s are not equipped with plastic cover plates 3 7 Installing a Board The installation procedures of SRPUs LPUs and service boards are almost the same The following section describes the installation pr...

Page 55: ...at is the positioning pins on the ejector levers touch the positioning holes on the chassis 2 Turn the ejector levers towards the front panel to drive the positioning pins into the positioning holes F...

Page 56: ...the PoE power entry module which is shown in Figure 3 17 Figure 3 17 PoE power entry module 2 Keep the PoE power entry module in the correct letter direction Do not turn it upside down Otherwise you...

Page 57: ...he cable connection between the external PoE power supply and the S9500 series switch For the installation of the external PoE power supply see the manual accompanying the power supply I Grounding the...

Page 58: ...blue DC power cable to the NEG terminal of the PoE power entry module and fasten the mounting screw connect the other end to the NEG terminal of the external PoE power supply 3 Connect the PGND OT te...

Page 59: ...d power cables are routed to the front of the chassis II Rack Mounted switch z The interface cables are bound on the cable management bracket on the left side of the chassis and are routed up or down...

Page 60: ...er to Appendix B Engineering Labels for Cables 3 9 2 Connecting Console Cable I Introduction Console cable is an 8 core shielded cable At one end of the cable is a crimped RJ 45 connector that is to b...

Page 61: ...switch is to be configured 2 Connect the RJ 45 connector of the console cable to the console port of the switch Figure 3 22 Connect the console cable Note The PC serial port is not hot swappable so yo...

Page 62: ...fer to Figure 3 21 and Table 3 3 II Connecting AUX cable 1 Plug the RJ 45 connector of the AUX cable into the AUX port of the switch 2 Plug the DB 9 male connector at the other end into the serial por...

Page 63: ...r devices 1 Preparations The installation prerequisites are as follows z The cabinet is fixed well z The device has been installed completely The installation involves the following materials z FMT z...

Page 64: ...on between optical channels which makes the optical system debugging and maintenance more convenient and the transit dispatching of the system more flexible Among various fiber connectors only the LC...

Page 65: ...ce the filleting radius must be not less than 2 mm When passing through a metallic board hole or bending along the acute side of mechanical parts the fiber must wear jackets or cushions z Insert and r...

Page 66: ...the power before checking the installation in case of bodily injury and device damage After installing the switch verify the installation against the following list For the successful installation all...

Page 67: ...e Switch 4 1 4 1 Setting Up Configuration Environment 4 1 4 1 1 Setting Up Configuration Environment 4 1 4 1 2 Setting Terminal Parameters 4 1 4 2 Powering On the Switch 4 4 4 2 1 Checklist for Switch...

Page 68: ...igure 4 1 Connect a PC to the switch with a Console cable 4 1 2 Setting Terminal Parameters This section describes how to set the terminal parameters 1 Start the PC and run the terminal emulation prog...

Page 69: ...of the new connection in the Connection Description dialog box and click OK The system displays the interface shown in Figure 4 3 Select a port in the Connect using drop down list Figure 4 3 Select a...

Page 70: ...Routing Switches Chapter 4 Commissioning the Switch 4 3 Figure 4 4 Set serial port parameters 5 Click OK after setting the serial port parameters to enter the HypterTerminal window as shown in Figure...

Page 71: ...t VT100 for terminal emulation and click OK Note You are recommended to select the Windows keys option button Figure 4 6 Set the terminal emulation parameters 4 2 Powering On the Switch 4 2 1 Checklis...

Page 72: ...on the switch 4 2 3 Verifying after Power on Recommended To ensure the configuration works that you will make on the switch you are recommended to check the switch after powering it on to make sure t...

Page 73: ...B to enter Boot Menu 0 Auto booting Boot from primary file Boot from cf S9500 app Initialize CF card done Loading from CF card done Booting from CF card Be sure the BaudRate is 9600bps Decompress Imag...

Page 74: ...5 2 5 1 4 Troubleshooting LPUs 5 3 5 2 Hardware Maintenance 5 4 5 2 1 Replacing a PSU 5 4 5 2 2 Replacing and Cleaning the PSU Air Filter 5 6 5 2 3 Replacing and Cleaning the Chassis Air Filter 5 8 5...

Page 75: ...his case you should check whether z The power system is working normally z The SRPU is working normally z The Console cable has been connected to the Console port on the SRPU If no problem has been fo...

Page 76: ...his case switch off the power supply loosen the captive screws on the PSU push the PSU into the chassis a little bit tighten the captive screws and switch on the power supply to check that the normal...

Page 77: ...ated z All the cables connecting the fan tray and the backplane have been correctly connected and are in good condition z The fans are working normally z The rotation of the fans has not been blocked...

Page 78: ...y with electricity Do not touch any exposed wires terminals or any parts of the product marked with a dangerous voltage label to avoid bodily injury z The PSUs of the S9500 series are hot swappable Be...

Page 79: ...eparated from the backplane refer to Figure 5 2 2 Hold the handle of the sub PSU with one hand and the bottom with the other hand and gently pull the sub PSU out of the chassis along the guide rails R...

Page 80: ...way even though they have different shapes Caution You are strongly recommended to clean the air filter semi monthly to guarantee adequate ventilation I Removing and cleaning the PSU air filter 1 Clu...

Page 81: ...Remove the air filter from the AC PSU II Installing the PSU air filter 1 Check that the black mesh has been nested in the air filter cover as shown in Figure 5 5 Figure 5 5 Install the PSU air filter...

Page 82: ...08V contains a chassis air filter For the S9500 series except the S9508V the procedure for replacing and cleaning installing the chassis air filter is the same I Removing cleaning and installing the c...

Page 83: ...e upper and lower edges using your index finger and the thumb and remove the air filter cover gently 3 Pull out the nested black air filter mesh 4 Wash the air filter mesh using water and then air dry...

Page 84: ...ay Caution z Do not touch exposed wires terminals or the switch parts where dangerous voltage warning is given to avoid bodily injury z Install a new fan tray soon after removing the old one to ensure...

Page 85: ...ng switch pull the fan tray half way out of the chassis to disconnect the power and wait till the fans stop rotating before pulling it out completely Considering that the fans may be still rotating av...

Page 86: ...ar an ESD preventive wrist strap Caution When you replace the fan tray on an operating switch pull the fan tray half way out of the chassis to disconnect the power and wait till the fans stop rotating...

Page 87: ...l it fits into the chassis with its plug fully touching the socket inside the chassis Figure 5 11 Replace the S9508V fan tray 2 Note The S9508V fan tray has no captive screws and is fixed by two locks...

Page 88: ...en the host software to be loaded does not match the current Boot ROM z You can load only Boot ROM and host software of SRPUs through the Boot menu To load Boot ROM of LPUs use the CLI mode 5 3 2 Loca...

Page 89: ...s 000f e222 ce4d Press Ctrl B to enter Boot Menu 0 Password Note To enter the Boot menu you must press Ctrl B within five seconds after the appearance of the prompt Press Ctrl B to enter Boot menu Oth...

Page 90: ...rwise you have to upgrade it during host program upgrade When loading the host program through the Boot menu you must configure correct attributes of the serial interface as shown in Figure 5 12 Other...

Page 91: ...ile to SDRAM through serial interface and boot 2 Download file to Flash through serial interface 3 Download file to CF card through serial interface 4 Modify serial interface boot parameter 0 Return t...

Page 92: ...before setting the baud rate and connect the terminal after finishing the work z Since the software Release 2100 and later is quite large in size you have to download it into the CF card 5 Select a r...

Page 93: ...h serial interface 3 Download file to CF card through serial interface 4 Modify serial interface boot parameter 0 Return to main menu Enter your choice 0 4 III Upgrading software through management Et...

Page 94: ...menu 4 Enter 5 in the Boot menu Press Enter and the system will access the download application program menu ETHERNET SUBMENU 1 Download file to SDRAM through ethernet interface and boot 2 Download f...

Page 95: ...n menu Enter your choice 0 4 2 7 At the prompt displayed in step 6 select a place for the downloaded file for example select 3 to download the file to the CF card and press Enter The system will displ...

Page 96: ...port In this case you should know the IP address of the PC At the same time connect the Switch to an external PC that can be the same one that contains the desired file via the Console port 2 Run FTP...

Page 97: ...P server on a local PC provided you have configured username and password and have set the correct file directory Suppose IP address of the PC is 10 10 110 1 Log on to the switch using Telnet or throu...

Page 98: ...ot of board 6 at this time is flash SWITCH001 app The app to boot of board 7 at the next time is flash SWITCH002 app The app to boot of board 7 at this time is flash SWITCH001 app H3C reboot Caution z...

Page 99: ...g the configuration you must check the operating status of the LPU Do not save the configuration during the LPU reboot Otherwise the configuration you want to save may be lost IV LPU program loading f...

Page 100: ...Installation Manual H3C S9500 Series Routing Switches Table of Contents i Table of Contents Appendix A Cable Management A 1 A 1 Correct Use of Labels A 1 A 2 Cable Management Requirements A 1...

Page 101: ...ble cannot be less than 5 times of its diameter at the place where it is led out of the connector z Different cables power cord signal cable PGND wire etc should be cabled and bound separately rather...

Page 102: ...III z The spare cables or excessive cable parts should be folded and bound and placed at a right place in the cabinet or on the cabling channel A right place refers to the place where the cables will...

Page 103: ...s to free the terminal and the cable from stress z Do not use tapping screws to fasten the connecting terminals z The power cords of the same type and in the same direction should be bound together an...

Page 104: ...Writing Labels B 5 B 1 5 Affixing Labels B 5 B 1 6 Information Carried on Labels B 8 B 1 7 Remarks B 8 B 2 Engineering Labels for Ethernet Cables B 9 B 3 Engineering Labels for Optical Fibers B 10 B 3...

Page 105: ...et The signal cables include external cables of alarm box Ethernet cables optical fibers trunk cables and subscriber cables excluding the antenna feeders Note In case there is special requirement from...

Page 106: ...ding line is 1 5mm 0 6mm in size with the color of PONTONE 656c light blue The cut dotted line helps to fold the label when affixing it to the cable and its size is 1 0mm 2 0mm There is a mark TO upsi...

Page 107: ...rectly modify the contents on the template and the following should be observed z The settings of centered characters direction and fonts should not be changed z When there are too many characters to...

Page 108: ...usting the page setup is as follows 1 Select the menu item File Page Setup 2 Select the Margins tab page 3 Select Left for Gutter Position 4 Set Header and Footer as 0 and adjust the values of Top Bot...

Page 109: ...ontaminate the label and blur the words Note The delivered marker has two nibs Make sure to use the smaller nib to write the labels For the sake of easy recognition and good looking the font in handwr...

Page 110: ...he connector on the signal cable In special cases for example to avoid cable bent or affecting other cables other positions are allowed to affix the labels 1 Stick the label to the proper position on...

Page 111: ...able tie The label should be stuck to the rectangular flute and should be stuck to only one side of the identification plate Make sure to affix the labels on the same side of the identification plates...

Page 112: ...B 9 Printed parts on the label for signal cables Seen from the cabling end of the equipment the text part of the label is on the right side of the cable The side with TO that is facing outside carrie...

Page 113: ...Valid location number of the terminal device onsite If the cable is connected to a router in a cabinet the serial numbers of the cabinet the frame and the Ethernet interface of the router should be sp...

Page 114: ...Port 05 Slot 10 Frame 03 of the cabinet on Row A Column 01 in the machine room B02 03 12 indicates that the opposite end of the Ethernet cable is connected with Ethernet Port 12 Frame 03 of the cabine...

Page 115: ...receiving interface T optical transmitting interface MN cabinet number B frame number C physical slot number D optical interface number The meanings are the same as above When the local device and the...

Page 116: ...MN cabinet number For example A01 B frame number Numbered in bottom up order with two digits for example 01 C physical slot number Numbered in top down and left right order with two digits for exampl...

Page 117: ...n plates on cable ties I Meaning of the label Table B 5 shows the information carried on the labels for the DC power cables Table B 5 Information on labels affixed to the DC power cables Content Meani...

Page 118: ...13 1 indicates the label on the loaded cabinet side which carries the information about the position of the cable on the power distribution box 2 indicates the label on the distribution box side which...

Page 119: ...r way B 4 2 Labels for AC Power Cables The labels are affixed to the AC cables that provide power for the cabinets and the protection grounding cables including the POWER PGND and BGND cables The 220V...

Page 120: ...ple of the labels on the AC power cable In Figure B 14 1 indicates the label on the loaded cabinet side which carries the information about the position of the cable on the power socket 2 indicates th...

Page 121: ...Installation Manual H3C S9500 Series Routing Switches Table of Contents i Table of Contents Appendix C Installation of Lightning Arrester for AC Power C 1...

Page 122: ...cable clips and screws to fasten the lightning arrester for AC power on the cabinet workbench or the wall of equipment room Mainboard Grounding and polarity indicator red On means that the lines are w...

Page 123: ...ctly locate the problem whether it is caused because the ground wire of the arrester is not well grounded or because the live and zero wires are connected in reverse direction You may check that in th...

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