GE Industrial Solutions Spectra RMS Molded Case - Manual (Page 49)

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GEH-702 Users Manual
Appendix E. Troubleshooting
The trip unit display is blank.
External +24 VDC is absent.
The load current fluctuates near 20% of
the breaker sensor rating.
At least 20% of the current sensor rating, (xCT)
must be flowing through the breaker to activate
the display.
Check that the control power supply is
present and operational.
The trip unit display E03. Memory failure. Return the unit to GE.
The trip unit display E04. Memory failure. Return the unit to GE.
The trip unit display E06 Internal failure. Return the unit to GE.
The trip unit display E08. Invalid rating plug
Check the rating plug. The rating plug
value shall not exceed and be below 40% of the
breaker sensor.
Ensure the rating plug is properly seated.
Unit does not communicate with
the Master.
The communication wires are shorted
or improperly connected.
Incorrect baud rate.
Incorrect address.
Locate and repair the short or the
incorrect connection.
Check that the baud rate assigned to the trip unit,
agrees with the baud rate at the host .
Check that the address assigned to the trip unit ,
agrees with the address at the host
Current readings are incorrect. Incorrect rating plug value. Check the rating plug label.
Voltage readings are incorrect.
The potential transformer (PT) primary
voltage was defined incorrectly.
The PT connection was defined incorrectly.
Read the PT primary rating from the PT name
plate and set trip unit PT to this value.
Set the trip unit phase to phase PH-PH or phase
to neutral PH-N according to the system.
Instantaneous trip
Rating plug is less than 37% of sensor rating.
Internal failure
Replace the rating plug with appropriate value.
(unit can be tested with no rating plug installed,
it will default to 37% of sensor).
Return unit to GE.
The power readings are incorrect The breaker left-right orientation is incorrect
Set the trip unit left-right orientation according to
the equipment in which it is installed
Overvoltage relay caused a trip.
The voltage conditioner plate does not have a
proper 24 volt DC source Check wiring and apply a 24 volt source to the
voltage conditioner plate
The date in the event log is 0.
When breaker closes into a fault without
auxiliary 24 volts, the microprocessor cannot
write the date information.
Use an external 24-volt source for the trip unit.