User guide

Component Failure Recovery
96-30052-001 Rev. A4 DataDirect Networks StorageScaler 8460 User Guide | 43
3.2.1 Replacing a Power and Cooling Module
If a power supply or fan fails, the Fault LED on the PCM will turn amber.
If a power supply unit or its fan is faulty, you must replace the whole PCM. You must not take
any longer than 5 minutes to replace this module to prevent the enclosure from over-heating.
NOTE : If replacement of a PCM is required, the fans in the other PCM will increase
to maximum speed when the failed module is removed. This is to maintain
proper cooling. Fans will return to normal operation when the replacement
PCM is inserted and powers up.
To replace a PCM:
NOTE : Obtain a replacement module of the same type before removing any faulty
module. Both PCMs must be from the same manufacturer to avoid power
spikes and controller resets when removing a PCM.
1. Identify the failed PCM with an amber Fault LED.
2. Turn off the module’s power switch and disconnect the power cable.
3. Loosen the module’s thumbscrew (Figure 48).
4. Grasp the tab on the lock bar and pull down the lock bar.
5. Then slide the module out of the bay.
6. Ensure that the power switch on the new (replacement) module is OFF.
7. Slide the module into the bay and engage the lock bar to cam the module in place.
8. Tighten the thumbscrew to secure it.
9. Connect the power cable.
10. Turn on the power switch. Verify that the AC and DC LEDs are green, indicating that
the module is operating normally.
After a few moments, the SS8460 will detect the replacement PCM. At this time, the alarm
will go off (along with any failure LEDs), and the cooling fans will return to normal speed.
Figure 48. Power and Cooling Module
Thumbscrew
Lock Bar Tab
Lock Bar