User's Manual

68 4Motion System Manual
Chapter 2 - Installation
Figure 2-15: PIU Module Front Panel
CAUTION
When replacing a PIU, disconnect power from the PIU module before inserting/ejecting it to/from
the chassis. After disconnecting from power, disconnect the power cable to avoid irreversible
damage due to potential excessively high transient current. Connect power to the PIU only after it is
fully inserted into the chassis.
Table 2-8: PIU LEDs
PWR and
MASTER/ACT LEDs
PIU Status
PWR MASTER/
ACT
Off Off Chassis is not connected to power
Red Off Power input is out of range or PIU card is damaged. Chassis is powered by the
redundant PIU