GE Medium Voltage GP Type G Drives, 2300 V manual Card or connector failure, Cabp Backplane

No.	Name	Type	Description
36	BICM card clock	Trip	The BICM card clock fail trip fault occurs when FPGA logic on the BICM
	fail		cannot detect the presence of either one of its clock signals. One of the clocks
			it is looking for is generated by a crystal on the BICM itself and the other is
			transmitted via the rack backplane from DSPX.
			Primary causes:
			Card or connector failure.
			Possible board failures:
			BICM
			DSPX
			CABP (Backplane)
37	Rack pwr supply	Trip	The Rack pwr supply lost trip fault occurs when logic on the BICM cannot
	lost		detect the presence of one of the power supplies being generated by RAPA.
			The power supplies monitored include P5, P15, N15 and I24. These supplies
			are distributed via the backplane to control cards including BICM. I24 is also
			brought to ATBA for use in customer I/O.
			Primary causes:
			Short across one of the monitored power supplies
			Power supply module failure
			Possible board failures:
			BICM
			RAPA
			CABP (Backplane)
38	DC bus imbalance	Trip	The DC bus imbalance trip fault occurs when the magnitude of the upper and
			lower half of the DC bus circuits in the bridge differ by more than 10% of
			nominal. A typical Nominal DC bus voltage would be 3500V so a difference of
			around 350V would trigger this trip fault.
			If the fault occurs immediately after but not during a DC bus charge cycle
			completes then a ground fault in the input section of the drive should be
			suspected. Check the transformer secondary windings and the input line filter
			assemblies for a ground.
			Primary causes:
			One or more failed bleeder resistors (BRES1-6).
			A ground fault in the input rectifier section
			A ground fault in a transformer secondary winding.
39	DC pos bus over	Trip	The DC pos bus over volt trip fault is hardware generated. The trip fault
	volt		occurs when the positive DC link voltage is too large.
			Possible board failures:
			FOSA
			DSPX
40	DC neg bus over	Trip	The DC neg bus over volt trip fault is hardware generated. The trip fault
	volt		occurs when the negative DC link voltage is too large.
			Possible board failures:
			FOSA
			DSPX
41	DC bus over	Trip	The DC bus over voltage trip fault occurs when the DC link voltage feedback
	voltage		(variable DC bus voltage) is too large.
			The main purpose of the trip fault is to detect excessive and potentially
			dangerous DC link voltages. When the over voltage condition is detected the
			power bridge is shut off immediately.

Possible board failures:

FOSA

DSPX

GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 2 Faults and Troubleshooting • 2-9