Replacing an ac power supply
About this task
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The power supplies are customer replaceable units (CRUs) and do not require preventive maintenance.
Use only the supported power supplies for the storage subsystem.
Each power supply has a built-in sensor that detects the following conditions:
v Over-voltage
v Over-current
v Overheated power supply
If any of these conditions occurs, one or both power supplies will shut down. If the power remains off
(does not automatically restart), make sure that the environment is optimal (no overheating has occurred,
all electrical receptacles are working, and so on).
If both power supplies fail or if the power supplies cannot maintain an internal temperature below 65°C
(149°F), the power supplies will automatically shut down (an overtemperature condition). If this occurs,
you must cool the storage subsystem and restart it.
Chapter 5. Replacing components 109
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