GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 2 Faults and Troubleshooting
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2-3
Fault Descriptions
Note When troubleshooting leads to a hardware inspection or component
replacement, be sure t o follow the procedures descri bed in the drive User’s Guide,
GEH-6382. This will help ensure that th e equipment operates correctly.
When troubles hooting leads t o a hardware inspe ction or
component replacement, be sure to follow the procedures
described in the drive User’s Guide, GEH-6382. This will help
prevent damage caused by incorrect installation and ensure
that the equipment operates correctly.
Table 2-1. Fault Definitions and Probable Cause
No. Name Type Descript ion
1 CPFP isolation lost Trip The CPFP isolation lost trip fault is hardware generated. The CPFP power
supply isolation card is indicating that power supply isolation to the phase
modules has been compromised. The CPFP card is designed to provide
control power to circuit cards in the high voltage compartment. This card has
a double voltage barrier that isolates the phases from each other and from the
control. This fault indicates that one of these voltage barriers has failed. This
is a dangerous situation since failure of the second barrier could cause
dangerous voltages to conduct into the cont rol cabinet or cause a phase-
phase short on the CPFP card. The fault is generated when the status light
conducted via fiber from the CPFP goes out . The fiber connects CPFP (PWR
OK) to FOSA (SPARE-R). Check that the fiber is installed correctly.
Disconnect the fiber f rom FOSA and look for the status ligh t traveling up the
fiber. If you do not see a light then the problem is on CPFP. If there is light
then the pro blem is on FOSA or BI CM.
Primary ca uses:
CPFP power supply failure
Fiber not connected
Possible board failures:
CPFP
FOSA
BICM
Possible wiring faults:
Power distribution wiring to CPFP.
2 Illegal seq state Trip The Illegal seq state trip fault occ urs when the sequen cer state (vari able
Sequencer state) is unrecognized. This trip may occur during system
development but should not occur in the field.