Quantum QXS G2 Series, Руководство по установке и обслуживанию оборудования

Страница: 182 / 246

170 QXS G2 Hardware Installation and Maintenance Guide
CAUTION: Do not remove the cover from the PSU due to danger from electric shock inside. Return
the PSU to your supplier for repair.
See ESD Precautions on page 165 for additional ESD information.
TIP:
The illustrations show PSU module replacement within the right slot as you view the chassis
rear panel. To replace a PSU in the left slot, you would first rotate the module 180º about its
longitudinal axis, so that it properly aligns with its connectors on the back of the midplane.
Removing a 2U PSU
CAUTION: Removing a PSU significantly disrupts the chassis airflow. Do not remove the PSU until
you have received the replacement module. It is important that all slots are filled when the chassis is
in operation.
Before removing the PSU, disconnect the power from the PSU by either the mains switch (where
present) or by physically removing the power source in order to ensure your system has warning of
imminent power shutdown.
• A faulty PSU must be replaced by a fully operational PSU within 24 hours.
• Ensure that you correctly identify the faulty PSU before beginning the step procedure.
Complete the following steps to remove a PSU.
1 Stop all I/O from hosts to the chassis. See also Stopping I/O on page 181.
TIP: This step is not required for hot-swapping. However, it is required when replacing both PSUs at
once.
2 Use management software to shut down any other system components necessary.
TIP:
This step is not required for hot-swapping. However, it is required when replacing both PSU at
once.
3 Switch off the faulty PSU, and disconnect the power supply cable.
4 If replacing a single PSU via hot-swap, proceed to step 6 .
5 If replacing both PSUs, verify that the chassis was shut down using management interfaces, and
that the chassis is powered off.
6 Verify that the power cord is disconnected.