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
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