QLS250, QLS450, QLS650, and QLS800

QLS250, QLS450, QLS650, and QLS800 Appliances have a redundant power supply unit (PSU) and support DC PSUs.

If necessary, you can replace a PSU. Note that all PSUs on an appliance must be of the same type (DC).

Important - Make sure you are electromagnetically grounded before you install, uninstall, or replace a PSU. ESD (electrostatic discharge) can damage the appliance.

QLS250 Appliance Rear Panel

QLS450, QLS650, and QLS800 Rear Panel

Legend

Item

Description

1

Release lever

2

LED indicator for each power supply unit

  • Off - No power cord is connected to any of the PSUs in the system

  • Green - System on

  • Blinking green - Power cords are connected to all PSUs, but system is off

  • Amber - No power cord is connected to the PSU, but other PSUs in the system are connected to a power cord

  • Blinking amber - Warning that a hardware issue (high temperature, high power, high current, slow fan) might lead to an issue with the PSU

  • Blinking green amber - PSU undergoing Firmware update

3

Extractor handle

4

QLS250 - Two DC PSUs
QLS450, QLS650, and QLS800 - Three DC PSUs (two are required for the appliance to work, and the third is for redundancy)

5

ESD grounding point

6

Alarm off button for power supply units

Removing a DC Power Supply Unit

Before you remove a power supply unit, we recommend that you make sure that:

  • In QLS250 - A second DC power supply is installed and connected to a working power source

  • In QLS450, QLS650, and QLS800 - Two other DC power supplies are installed and connected to a working power source

    Or

  • The appliance is shut down.

To remove a power supply unit:

  1. Loosen the two DC power cord retaining screws from the power supply.

  2. Remove the power cord from the power supply unit.

  3. If the alarm sounds, press the Alarm Off button to the right of the power supply units.

  4. Press and hold down the release lever as shown.

  5. While holding the release lever, pull the extraction handle to remove the power supply unit.

Note - Remove the power supply unit only with the extraction handle to prevent any possible damage.

Installing a Replacement DC Power Supply Unit

To install a replacement power supply unit:

  1. Insert the power supply unit into the power supply slot.

  2. Push in the power supply unit until the release lever clicks.

  3. Insert the power cord into the power supply socket.

  4. Tighten the two DC power cord retaining screws onto the power supply.

  5. Make sure that the power LED is illuminated.

PSU Configuration and Monitoring

See the Quantum LightSpeed Appliances Getting Started Guide for PSU configuration and monitoring options for your appliance model.