2–14
DECbridge 500/600 Problem Solving
Figure 2–3:
Problem Solving a Power-Off Condition
No
Yes
Yes
No
No
Yes
No
Bridge power is off
(all LEDs are off).
Ensure that power
cord is connected to
a live AC outlet.
Reset it. If it trips again,
replace the power sup-
ply and retest.
Remove power cord for
15 sec, then reapply.
Replace power supply
and retest.
DC_OK
LED on?
Any
indication found
in log?
Log
indicates fan
failure?
Possible over-tem-
perature in power
supply. Check for
obstructions at in-
let/outlet grills and
for hot environ-
ment.
Replace fan
assembly and
retest.
Solve the problem
condition
indicated in the er-
ror log.
Check
error log
for cause
of shut-
down.
Solve the problem condition
indicated by the LEDs.
Yes
No
No
Yes
Yes
No
Replace fan
assembly
and retest.
Yes
Replace power
supply and
retest.
Circuit breaker
tripped?
Do all LEDs
return to normal
state after self-
test?
Does
FAN_BAD LED
stay on?
LKG–5058–91I
Do all LEDs
remain off during
lamp check?
