I.B. 29C891B
Page 48
Effective 11/98
Table 5.1 Troubleshooting Guide (continued from previous page)
Symptom
Probable Cause
Possible Solution(s)
References
Breaker trips too rapidly
GOUT to GIN and/or SOUT to SIN
Add connections
Table A.1
on ground fault or short
are not shorted.
Wiring Diagrams
delay (zone selective
interlocking not used).
Trip unit settings are not correct.
Change settings
I.B. 29C892, Section 3
or
I.B. 29C893, Section 4
Trip unit may be the problem.
Replace breaker. Refer to Note 1 at end of
Para. 5-3
Table 5.1.
Breaker trips too rapidly on
Unpowered thermal memory may
If unpowered thermal is not required, turn it off
I.B. 29C892, Para. 3-6
long delay.
cause breaker to trip too soon.
using OPTIMizer.
Trip unit settings are not correct.
Change settings
I.B. 29C892, Section 3
or
I.B. 29C893, Section 4
Trip unit may be the problem.
Replace breaker. Refer to Note 1 at end of
Para. 5-3
Table 5.1.
Zone selective interlocking
on ground fault and/or
See directions for checking zone selective interlocking
Appendix B
short delay does not work.
R-Frame, SPB Pow-R and DSII/DSLII Circuit Breakers with Auxiliary Power
Unit status LED is not
No voltage or incorrect voltage input.
Measure voltage at terminals C9 - C10 on RD
Table A.1
blinking.
and SPB breakers or 5 - 6 on DSII breakers,
Wiring Diagrams
should be 115V 60Hz or 230V 50Hz per breaker
label.
Trip unit may be the problem.
Replace trip unit
Para. 5-3
As soon as auxiliary power
Rating plug not installed or pins not
Install rating plug and/or check for loose con-
Para. 2-6 & 5-4.2
is applied, instantaneous
making good connection.
nections.
trip LED comes on.
Note: Breaker cannot be closed if
rating plug is not installed.
Rating plug is open internally
Replace rating plug
Para. 5-4.2, Table 2.1
Trip unit may be the problem.
Replace trip unit
Para. 5-3
LED does not come on
Battery installed backwards
Install correctly
Para. 5-4.1
when battery check button
inside rating plug is
Dead battery
Replace battery
Para. 5-4.1, Table 2.2
pressed.
Bad rating plug
Replace rating plug
Para. 5-4.2, Table 2.1
Summary of Contents for Digitrip OPTIM 1050
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