Eaton MP-3000 Instruction Leaflet page 89

Symptom
All LEDs and displays are off or
unintelligible.
OPTO ERR message
Display
A/D ERR A/D CONVERTER ERROR TRIP
RAM ERR RAM ERROR TRIP
ROM ERR ROM ERROR TRIP
OPTO ERR OPTOCOUPLER FAILURE TRIP
NON VOLATILE MEMORY
ZRAM ERR
ELEMENT SHOULD BE REPLACED
FLASHERR FLASH WRITING ERROR
NOTES:
1. Setting P12L16 permits a choice as to whether these internal failures produce alarm plus trip, or just an alarm.
Table 12.3 Troubleshooting Operator Panel Malfunctioning.
Probable Cause
Incoming ac deficient
MP-3000 malfunctioning
An optocoupler failure trip based on bad
timing of ac input waveform zero cross-
ings
Table 12.4 Internal Diagnostic failure Message
Complete help Message
www.eaton.com
MP-3000
Reset unit. If problem persists, replace unit.
Cycle control power. If problem persists, reprogram unit,
save settings, and cycle control power. If problem still
persists, replace unit.
Replace unit or contact Eaton.
Refer to Table 12.3, OPTO ERR, for details.
Cycle power. If problem persists, reprogram unit, save set-
tings, and cycle control power. If problem still persists, unit
needs recalibration. Contact the Eaton supplier.
Reprogram settings and cycle control power. If problem
persists, replace unit or contact Eaton.
Solution
The MP-3000 operates down to 55% of
rated voltage, but such a low voltage is
not normal and should be diagnosed.
Verify that 120 or 240 Vac (±15%) exists
between terminals 4 and 7.
Remove ac power completely for 10
seconds and reapply it. If the 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 causes this error
message.
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action
IM02602002E
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