Eaton MP-4000, Instruction Bulletin For Installing, Operating, And Maintaining

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Page 12-8
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IB02602002E MP-4000
NOTES:
1. Refer to Table 12.3 for OPTO ERR.
2. 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.
Symptom Probable Cause Solution
All LEDs and displays are off or
unintelligible.
Incoming ac deficient.
MP-4000 malfunctioning.
The MP-4000 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-4000 to the fac
-
tory for repair.
OPTO ERR message
An optocoupler failure trip based on bad
timing of ac input waveform zero
crossings
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.
Table 12.4 Internal Diagnostic Failure Messages.
Display Complete help Message
A/D ERR A/D CONVERTER ERROR TRIP
RAM ERR RAM ERROR TRIP
ROM ERR ROM ERROR TRIP
OPTO ERR OPTOCOUPLER FAILURE TRIP 1
ZRAM ERR NON VOLATILE MEMORY ELEMENT SHOULD BE
REPLACED
FLASHERR FLASH WRITING ERROR