“Connection Failure” when
OPTIMizer not working or cord not
Verify OPTIMizer operation on another breaker.
I.B. 29C892
OPTIMizer is plugged in.
properly plugged into OPTIMizer.
Para. 2-2.2 & 3-2
Cord not properly plugged into
Check connection. If unit status LED is blinking,
Para. 2-4.1
breaker.
connection is OK.
Rating plug is not installed or is
Instantaneous LED will be on. Install rating plug
Para. 2-6 & 5-4.2
loose.
and/or check for loose connections.
Rating plug is open internally
Replace rating plug
Para. 5-4.2, Table 2.1
Trip unit may be the problem.
Replace breaker. Refer to Note 1 at end of
Para. 5-3
Table 5.1.
Ground fault alarm unit
Connections to ground fault alarm
Check connections
Table A.1
does not operate on a
unit are incorrect.
Wiring Diagrams
ground fault.
Ground fault alarm is not operating
Press test button on ground fault alarm unit.
Table A.1
Button should illuminate. If it does not, check
Instructions for
that 120V is being supplied to unit. If it is,
ground fault alarm
replace the ground fault alarm unit.
Breaker is not providing an alarm
Temporarily disconnect the wires to L1 and L2
Table A.1
on the ground fault alarm unit. With these con-
Instructions for
nections open, approximately 5 volts should
ground fault alarm
appear between GF, AL and COM when the
and wiring diagrams
ground fault current exceeds pickup. On ground
fault alarm breakers, this voltage will be present
as long as pickup is exceeded. On ground fault
trip breakers, this voltage appears only trans-
iently after a trip and must be observed with an
oscilloscope. If the voltage is not present, the
problem may be in the breaker. Refer to Note 1
at the end of Table 5.1.
Breaker trips on ground
There actually is a ground fault
Check circuit to find the location of the fault.
N.A.
fault.
On four wire systems the neutral
(1) Check neutral sensor and neutral sensor
Table A.1
current sensor may not have the
connections on side terminal block are good.
Wiring Diagrams
correct ratio or be properly con-
(2) Check that the neutral current sensor ratio
nected.
matches the breaker. (3) Check that connections
from the neutral current sensor to the breaker
are not reversed.
Trip unit may be the problem.
Replace breaker. Refer to Note 1 at end of
Para. 5-3
Table 5.1.
I.B. 29C891B
Page 47
Effective 11/98
Table 5.1 Troubleshooting Guide (continued from previous page)
Symptom
Probable Cause
Possible Solution(s)
References
Summary of Contents for Digitrip OPTIM 1050
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