MLS400

MLS400 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.

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

Two DC PSUs, next to each other

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 either:

  • A second DC power supply is installed and connected to a working power source.

    Or

  • The appliance is shut down.

To remove a power supply unit:

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

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

  3. While you press and hold the release lever, pull the extraction handle to remove the power supply unit.

Legend

Item

Description

1

Release lever

2

Extractor handle

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 the power supply unit in until the release lever clicks.

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

  4. Make sure that the power LED is lit up.

PSU Configuration and Monitoring

See the Getting Started Guide for PSU configuration and monitoring options:

Quantum LightSpeed Appliances Getting Started Guide