MLS200

The appliances have a redundant Power Supply Unit (PSU). They support AC PSUs.

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

Warning: To protect yourself and the appliance PSUs from electrostatic discharge, make sure that you are electromagnetically grounded before you install, uninstall, or replace a PSU. We recommend that you use an ESD grounding wrist strap. Connect the grounding plug on the wrist strap to the appliance grounding point.

Warning - All work related to the AC power must be performed by trained and certified service personnel only.

Legend

Item	Component	Description
1	Release lever	Used together with the extraction handle to remove the PSU
2	Extraction handle	Used together with the release lever to remove the PSU
3	LED indicator for each PSU	Off - PSU is not connected to an electric outlet Amber - Power off Green - Power on Red - Failure
4	PSU socket	Connects to an electric outlet with a power supply cable. Use the cable restraint clips to avoid accidental removal of the power supply cable.
5	Alarm Off button	If a power supply cable is not connected to the outlet, an alarm sounds continuously. Press this button to turn off the alarm for the PSU.

Removing an AC Power Supply Unit

Before you remove a Power Supply Unit, we recommend that you make sure that either:

• Another PSU is installed and connected to a working power source

  Or

• The appliance is shut down

To remove an AC Power Supply Unit:

1. Remove the power supply cable from the AC PSU.

2. If the alarm sounds, press the Alarm Off button to the right of the AC PSU.

3. While holding the PSU 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 an AC Power Supply Unit

To install a replacement AC power supply unit:

1. Insert the AC PSU into the power supply slot.

2. Push in the AC PSU until the release lever clicks.

   

3. Insert the AC power supply cable into the power supply socket.

4. Make sure that the power LED on the AC PSU is lit up.

Using the AC Power Supply Cable Restraint Clip

The appliance has power supply cable restraint clips attached to the Power Supply Units. Use the restraint clip to prevent accidental removal of the power supply cable.

To secure the restraint clip on the power supply cable:

1. Make sure the restraint clip is in the open position (facing upward) and connect the power supply cable to the power supply socket on the PSU.

   

2. Push down on the restraint clip to close it and secure the power supply cable.

   

Legend

Item	Description
1	Restraint clip in the open position (facing upward)
2	Restraint clip in the closed position