FUJITSU PRIMERGY RX600 S5 - Manual (Page 74)

74 Operating Manual RX600 S5
Control elements and indicators Starting up and operation
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In normal server operation, LED 1 and 3 light up permanently, LED 2 does not
light up. As soon as LED 2 indicates a fault by lighting up, the affected power
supply unit should be replaced as soon as possible. This can be done during
operation (see
"Hot-plug power supply units" on page 93 ).