28Figure 45 Connecting the grounding cable to a grounding strip(1) Hex nut (2) Ring terminal(3) Grounding post (4) Grounding stripInstalling/removing fan traysCAUTION:The switch has multiple fan tray slots. To ensure good ventilation of the switch, follow theseguidelines to install and remove fan trays:• The switch is provided with the fan tray slots empty. Before powering on the switch, make sure allfan tray slots have fan trays installed and the fan trays are the same model.• Make sure all slots have a module or filler panel installed when the switch is operating.• If multiple fan trays fail on an operating S6850-56HF, S6850-2C, or S9850-32H switch, do notremove the fan trays at the same time. Replace the fan trays one after another and finishreplacing a fan tray within 3 minutes.• If a fan tray fails on an operating S9850-4C switch, replace the fan tray immediately and keep thefailed fan tray in position before replacement. If two fan trays fail, finish replacing the fan trayswithin 1 minute.The installation and removal procedures are the same for the LSWM1FANSA, LSWM1FANSAB,LSWM1BFANSC, and LSWM1BFANSCB fan trays. The following installation and removalprocedures use the LSWM1FANSA fan tray as an example.Installing a fan trayCAUTION:To prevent damage to the fan tray or the connectors on the backplane, insert the fan tray gently. Ifyou encounter a hard resistance while inserting the fan tray, pull out the fan tray and insert it again.1 2 3 4