xii Safety guidelines
Hitachi Compute Rack 220H CRU Replacement Guide
Poor contact and tracking
Comply with the following instructions when handling the power plug.
Otherwise, tracking or poor contact may cause overheating and a fire.
• Make sure that the power plug is fully and securely inserted into the
electrical outlet.
• Before inserting the power plug, confirm that there is no dust or a water
droplet on the plug. If any dust or water droplet is found, wipe it off with a
dry cloth and then insert it.
Requirements for power outlets
• Use a grounding 2-pole plug-in power outlet. Outlets of any other types
would cause an electric shock or fire.
• In order to prevent an electric shock, connect the outlet’s grounding
electrode to a grounding terminal installed by a qualified electrician.
Without connection to the grounding terminal, an electric shock can occur
in the event of a failure in power supply.
Plugging and unplugging
When inserting the power plug into the electrical outlet or removing it, be
sure to hold the plug section. Do not pull the cable; it can partially break the
wire, overheat the broken part and lead to a fire.
Power supply
Since the power supply has a high-voltage area in it, do not open the cover.
If you do, it can result in an electric shock or equipment failure.
Installing power supply slot cover
When removing a power supply, do not insert your hand or tool inside the
power slot. After removing a power supply, install a power slot cover. Inside
the power slot, some conductors are exposed. If you touch them with your
hand or tool, it may cause electric shock or equipment failure.
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