Page 12-6
Effective 10/02For more information visit: www.cutler-hammer.eaton.comIL17562BH04
Display
TBS MMM
TRANSIT
Complete Help Message
TIME BETWEEN STARTS TRIP,
REMAINING MINUTES ACTIVE
SHOWN
LOW TO HIGH VOLTAGE
TRANSITION ERROR TRIP
Probable Cause
Restarting blocked until user-set
time between starts has expired.
Starting current was still above the
transition threshold P5L5 when the
transition timer P5L6 delay expired.
Solution
Wait the indicated time before restart-
ing.
Note: The number of cold starts
(NOCS) setting may suppress this
blocking during the first n cold starts.
•This trip is initiated only if setting
P5L7 is set to TRN I or TRN T/C.
Check the correctness of transition
settings.
•Check motor and load for a cause of
slower than expected acceleration.
Symptom
All LEDs and displays are off or
unintelligible.
OPTO ERR message
Metered current readings too
low or too high.
Probable Cause
Incoming ac deficient.
MP-3000 malfunctioning
Optocoupler failure trip based on
bad timing of ac input waveform
zero crossings.
Incorrect current transformers and/
or PCT ratio setting P1L5.
Solution
The MP-3000 operates down to 55% of rated voltage, but
such a low voltage isn’t normal and should be diagnosed.
Verify that 120 or 240 Vac (±15%) exists between termi-
nals 4 and 7.
Remove ac power completely for 10 seconds and reapply.
If problem persists, return the MP-3000 to the factory for
repair.
Check the frequency setting P1L7 for 50 or 60 Hz as
appropriate. Make sure 120 Vac is used for discrete
inputs. Energizing with dc will cause this error message.
Acceptable Ct ratio is dictated by motor nameplate FLA.
PCT should be set to the actual Ct ratio. See Ct applica-
tion advice in Section 5, paragraph 5.1.5.
Table 12.3 Troubleshooting: Operator Panel Malfunctioning
Display
A/D ERR
RAM ERR
ROM ERR
OPTO ERR
ZRAM ERR
Complete Help Message
A/D CONVERTER ERROR TRIP
RAM ERROR TRIP
ROM ERROR TRIP
OPTOCOUPLER FAILURE TRIP
1
NON VOLATILE MEMORY ELEMENT
SHOULD BE REPLACED
NOTES:
1. Refer to Table 12.3 for OPTO ERR.
2. Setting P12L16 lets the user choose whether these internal
failures produce alarm plus trip, or just an alarm.
Table 12.4 Internet Diagnostic Failure Messages
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