Power values are grossly
No voltage input to trip unit.
Check PT disconnect plug is installed.
in error. (1050 Trip Units
only)
Frequency incorrect
Verify operating frequency with OPTIMizer.
I.B. 29C892, Para. 3-6
Trip unit may be the problem.
Replace trip unit
Para. 5-3
“Connection Failure” when
FIRST DISCONNECT VOLTAGE SUPPLY TO TERMINALS C9 AND C10 ON RD AND SPB
OPTIMizer is plugged in.
BREAKERS OR 5 AND 6 ON DSII BREAKERS TEMPORARILY.
(Place drawout breakers
in disconnect position which will remove voltage supply)
OPTIMizer not working or cord not
Verify OPTIMizer operation on another breaker.
I.B. 29C892
properly plugged into OPTIMizer.
Para. 2-2.2 & 3-2
Cord not properly plugged into
Check connection. If unit status LED is blinking,
Para. 2-5.1
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
Instantaneous LED will be on. Replace rating
Para. 5-4.2, Table 2.1
plug.
Trip unit may be the problem.
Replace trip unit
Para. 5-3
RECONNECT VOLTAGE SUPPLY
BIM will not communicate
Breaker address is > 32 (HEX)
Check address with OPTIMizer and change as
I.B. 29C892
with trip unit.
required.
Para. 3-5.1
No auxiliary power
If possible, open breaker or reduce breaker
Symptom: “Unit
current <20% of frame rating. Then check that
Status LED is not
unit status LED is blinking. If not, see first
blinking.”
symptom in this portion of the table.
Rating plug is not installed
Instantaneous LED will be on. Install rating
Para. 2-6 & 5-4.2
plug and/or check for loose connections.
Rating plug is open internally
Instantaneous LED will be on. Replace rating
Para. 5-4.2, Table 2.1
plug.
Open INCOM connection
Check connections at terminals C11 and C12 on
Table A.1
RD and SPB breakers or C6 and C7 on DSII
Wiring Diagrams
breakers. The transmit LED should flash when
there is communication. With the external con-
nections to C11 and C12 or C6 and C7 opened
temporarily, the resistance across C11 and C12
or C6 and C7 should be approximately 2.5 ohms.
Trip unit may be the problem.
Replace trip unit
Para. 5-3
I.B. 29C891B
Page 49
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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