Specifications

23
POWERCASSETTE FRONT-END
OPERATING MANUAL
19.0 TROUBLESHOOTING GUIDE
19.1 If you encounter difficulties in getting the PowerCassettes or the complete
rack to operate properly, go through the following troubleshooting guide.
19.2 Table 19-1. PowerCassette and Rack Troubleshooting
No output, AC Fail
and DC Good LEDs
off.
No output, DC Good
LED off, AC Fail LED
on.
No output, DC Good
LED off, AC Fail LED
on.
No output, DC Good
LED off, AC Fail LED
on.
SYMPTOM POSSIBLE CAUSE
No AC power.
Remote Enable
in OFF mode.
Shorted output.
Overvoltage
protection (OVP)
has latched.
Check connection to AC power source.
Check source circuit breakers.
Make sure Pin 7 (Enable) is at logic LO or
connected to - Sense, Pin 9, of the
Positronics connector.
Check for short and remove.
Reset output by cycling the input power
OFF for 10 seconds and then back ON.
ACTION TO TAKE
No output, DC Good
LED off, AC Fail LED
on.
Overtemperature
protection is
activated.
Total output load
is too large for
the PowerCassette
capacity.
Allow PowerCassette to cool down for about
10 minutes. It will then start up automati-
cally. Check to see if the cooling fans are
operating.
Reduce loads to proper levels.
19.3 If none of the above actions solves the problem, call UNIPOWER Corpora-
tion at 954-346-2442 Ext. 400 for help and try to resolve the problem over the
telephone.
No output, DC Good
LED off, AC Fail LED
on.