Interpreting Power Supply Lights - DEC 4000 600 series Owner's Manual

Power Problems
Figure 9–1 Power Supply Lights
Table 9–5 Interpreting Power Supply Lights
Light Meaning
Front End Unit (FEU)
AC Present When on, indicates AC power is present
at the AC input connector (regardless of
circuit breaker position).
9–6 Troubleshooting the System
FEU PSC
MO
SI
SO
DC5 DC3
AC Circuit
Breaker
FEU Failure
FEU OK
DC3 Failure
DC3 OK
DC5 Failure
DC5 OK
PSC Failure
PSC OK
Over
Overtemperature
Shutdown
Fan Failure
Disk Power Failure
Fault ID Display
AC Present
Action on Error
If AC power is not present, check
the power source and power cord.
If the system will not power up
and the AC light is the only light
that is on, check the AC circuit
breaker.
(continued on next page)
LJ-02011-TI0