IBM DCS9550 1S1 manual Power Supply/Cooling Modules, Removing a Power Supply/Cooling Module

Troubleshooting and Problem Solving

4.9.1Power Supply/Cooling Modules

Danger Do not remove covers from the Power Supply/Cooling (PSU) module. Danger of electric shock inside. Return the PSU to your supplier for repair.

4.9.1.1Removing a Power Supply/Cooling Module

ATTENTION Do not remove the faulty Power Supply/Cooling module unless you have a replacement unit of the correct type ready for insertion.

If a power supply unit or its fan is faulty, you must replace the whole Power Supply/Cooling module.

As there should always be two power supply units installed, you can continue working while replacing the faulty module.

1Make sure you identify the faulty Power Supply/Cooling module correctly, from the two modules installed.

2Switch off and disconnect the power supply cord.

3Squeeze the two latches on the PSU handle together (Figure 4–2) and open the handle to cam the PSU out of the enclosure (Figure 4–3).

4Grip the handle and withdraw the PSU (Figure 4–4).

4.9.1.2Inserting the Module

1Check for damage, especially to the rear connector on the PSU.

ATTENTION Handle the module carefully and avoid damaging the connector pins. Do not install the module if any pins appear to be bent.

2With the PSU handle (Figure 4–3) in the open position, slide the module into the enclosure.

Important Install the Power Supply/Cooling module in the right hand bay (Rear Bay

1)of the enclosure in an “upside down” orientation. If necessary, reorient the power cord clip so that the power cord can be properly retained.

3Cam the module home by manually closing the PSU handle (see Figure 4–4). A click should be heard as the handle latches engage (see Figure 4–2).

4Connect the power supply cord to the power source and switch the power supply ON.

Note The alarm will sound until the new Power Supply/Cooling module is operating correctly.

46 IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide