OWC JUPITER CALLISTO
ASSEMBLY & REPLACEMENT
9
2.4 POWER SUPPLY FAILURE & REPLACEMENT
The Jupiter Callisto has redundant, hot-swappable power supplies (two in the 8-bay, three in the 16-bay) and can withstand
a failure of one power supply module. While all of the power supply modules are healthy, the power load is automatically
balanced across them. In the event of a power supply failure, an alarm will sound and the ‘Power’ LED on the front of the unit
will turn solid red. To replace a failed power supply module, do the following:
1. Identify the failed PSU module by seeing which
module does not have its power LED lit.
2a. On the 8-bay Jupiter Callisto, each power
supply module is secured with one captive
thumbscrew (see
Figure 2.4a
). Loosen this
thumbscrew until it spins freely. If the screw
is too tight to loosen with your fingers, use a
flathead screwdriver.
2b. On the 16-bay unit the three power supply
modules are held in by a bar secured by one
Phillips screw at the bottom (see
Figure 2.4b
).
Remove this screw with a Phillips screwdriver,
then remove the securing bar.
3. Pull the power supply module out using the
black handle.
4. After removing the failed power supply
module, insert the new module, making sure it
is fully seated.
5. Re-install the screw. On the 8-bay, simply
tighten the thumscrew with your fingers,
being careful not to over-tighten. On the 16-
bay, replace the securing bar and use a Phillips
screwdriver to re-install the screw.
6. After securing the new power supply module
in place, plug in the power cord and turn on
the Jupiter Callisto if it was powered off during
the power supply replacement.
2.5 FAN FAILURE
When one of the fans inside the Jupiter Callisto fails, the ‘Fans’ LED on the front of the unit will flash red and the remaining
fans will ramp up to full speed to compensate. Contact OWC support for a replacement fan and for specific instructions on
the replacement process.
Figure 2.4b
Securing
screw
Removal
handle
Figure 2.4a
Securing
screw
Securing
screw
Removal
handle