Warning

Read completely the instructions detailed in Preliminary Service Information.

The UPS unit consists of the actual power supply and the accompanying battery pack. The unit is very robust but is very heavy, approximately 35 Kg including battery pack.

If you are going to remove the power supply, always do it as a single unit. Do not remove the battery pack first. The unit is severely out of balance without the battery pack and could unexpectedly roll over as you remove it.

It is essential that you use the utmost care when removing the UPS in order to avoid injury to yourself or damage to the unit. Do not attempt to remove or fit the unit alone. There should always be at least one other person available to help you.

Before you begin, ensure that the server is in a suitable area with plenty of work space. Then, use the jacking mechanism in the front castors to anchor them firmly to the floor so that the server cannot roll about.

1 Adjustment Wheel 2 Jacking Pad

Uninterruptible Power Supply Unit

Removing

1. It is vitally important to ensure that the system is shut down, the battery pack circuit breaker switch is in the Off position and the system is disconnected from the mains electricity supply.

2. If necessary, remove some of the expansion cards to improve access to the bus bars, which provide power to the motherboard. You may also need to unplug some of the data cables which are connected to the hard disk drive modules.

Caution

It is vital that you remember the exact cable and connector arrangement of your hard disks, particularly if you are using a RAID (Redundant Array of Independent Disks) configuration. If you fail to restore the arrangement so that all cables and plugs are as they were originally, you risk losing all the data on your hard disks.

3. Remove the motherboard cooling fan assembly as detailed in chapter 8.

Detach two pairs of motherboard bus bars and remove the set of 3 bus bars under the cooling fan assembly as shown in the following diagram:

1 Motherboard Bus Bars 2 Bus Bars for Hard Disk Power Distribution Panel

5. Make sure that there is enough clearance between the bus bars and their power supply connections to allow the unit to slide freely.

If there is not enough clearance, you will need to disconnect the other ends of the busbars and remove them completely. Take a careful note of each busbar and the position it was removed from.

Unplug three cables, one ribbon, one 12-way and one 16-way, from the power supply as shown:

1 System Controller (Ribbon Cable) Connector (12-way) 2 Motherboard Auxiliary Power (16-way) 3 Not used 4 Removable Media Drive Bay 5 Cable Connector Group

Loosen four floating fasteners, two on each side of the server, until they are free of the power supply unit, as indicated in the following diagram:

1 Floating Fasteners 2 Front Bezel

Now remove six screws on the back panel of the server, as shown:

Using the handle on the battery pack, pull the unit carefully until it is a little less than halfway out (about 30 cm), just before it begins to tip towards you.

Warning

This Power supply is heavy. It is strongly advised to have a second person with you to assist before you either fully remove the assembly from the server, or pick it up to fit it into its position in the server.

10. The second person should assist you, on the opposite side of the unit, from this point onwards.

Place your hands under the metal casing of the unit as indicated by the arrows in the following illustration:

Slide the unit out slowly until it is free from its housing. Now rest the unit on the floor. Do not drop it.

Fitting

1. With the help of the second person on the opposite side, place your hands underneath the power supply as indicated by the arrows in the illustration above.

2. Now carefully slide the unit all the way into the chassis.

Secure the unit to the chassis with the six screws as shown:

Now tighten the four floating fasteners, two on each side, located towards the front of the machine:

1 Floating Fasteners 2 Front Bezel

 5. Plug the ribbon, 12-way and 16-way cables into their connectors on the power supply.

Note that these connectors are keyed and can only be fitted in one position.

1 System Controller (Ribbon Cable)Connector (12-way) 2 Motherboard Auxiliary Power (16-way) 3 Not used 4 Removable Media Drive Bay 5 Cable Connector Group

6. Attach two pairs of bus bars and fit one set of 3 bus bars as shown in the following diagram.

As with the cables, it should not be possible to fit these bars incorrectly.

1 Motherboard Bus Bars 2 Bus Bars for Hard Disk Power Distribution Panel

Caution

The hardware used to hold the busbar connections must be tightened using a torque wrench set to 5 Newton meters (Nm).

7. Fit the motherboard cooling fan assembly.

8. Refit any expansion cards you may have removed to improve access.

Caution

It is vital that you remember the exact cable and connector arrangement of your hard disks, particularly if you are using a RAID (Redundant Array of Independent Disks) configuration. If you fail to restore the arrangement so that all cables and plugs are as they were originally, you risk losing all the data on your hard disks.

UPS Battery Pack

The UPS is equipped with a replaceable battery pack. It will provide electric power for your system for a specific period of time, depending on how many hard disks or other devices are installed. Use the SMA at any time to find out the exact battery life remaining (see the SMA User’s Guide for more details).

Do not attempt to remove the power supply if the battery pack has already been removed, as it will cause a serious imbalance, the battery pack can however be removed as an individual component.

Important - Warning

The battery pack contains lead acid batteries. In the EEC the directive 91/157/EEC (plus subsequent amendment 93/86/EEC) designates batteries containing lead to be handled as a dangerous substance.

Similar regulations will apply in other countries.

The battery pack must only be removed by a qualified electrician and must not be disposed of in domestic waste.

Removing

Remove the fastening screws as shown in the following diagram:

Pull the battery pack handle carefully and slide out slowly until the pack hits a ‘stop’. The following power connector will then be visible:

Gently pull the connector apart as indicated.

4. Now with a slight lift, you can remove the battery pack clear. (There is a further ‘end-stop’ to prevent the battery pack’s rear end falling out.)

Fitting

1. Make sure that the battery pack power connector is visible and accessible.

2. Carefully lift the battery pack over the ‘end-stop’ and slide it far enough into the chassis to reconnect the battery pack power connector.

Push the pack the rest of the way into the chassis, lifting slightly to pass over the ‘stop’.

Use the screws as shown in the previous diagram to secure the battery pack.