2 Design
2.3 LED Status indication
16 PXR Electronic trip unit 01/21 MN012005EN www.eaton.com
2.3 LED Status indication
Flashing
All PXR trip units have a Status LED for indicating the device status.
During normal operation, this indicator will flash green (approximately once
per second) to indicate that the trip unit is operating normally.
The Status LED will flash red if the trip unit has detected an internal fault.
This could be a problem with the trip actuator or trip unit, as well as firmware
error or a calibration error. In this case, immediate action must be taken to
remedy the fault and/or replace the unit.
LED does not light up
If the status indicator does not light up, either no auxiliary power is available,
or the trip unit’s primary supply is insufficient. This therefore does not
constitute a malfunction. The Status LED will flash again if the auxiliary
power supply is activated, or if the load on the circuit breaker rises to a level
greater than 15 %.
￫
For troubleshooting, also see
￫ chapter 11, “Troubleshooting”, page 159.
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