Filter
Top Products
GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 2 Faults and Troubleshooting
•
••
•
2-21
No. Name Type Description
103 A-B voltage offset Trip
The A-B voltage offset trip fault occurs when the A-B line-line voltage offset
(variable A-B, Voltage offset) is too large.
A-B, Voltage offset is the output of an automatic voltage offset calculation.
The trip fault only occurs when the offset calculation is not active.
A-B voltage offset evaluates A-B voltage feedback information collected while
the power bridge is turned off, when voltage feedbacks should be zero. It
uses the information to detect power bridge and feedback circuitry problems.
104 B-C voltage offset Trip
The B-C voltage offset trip fault occurs when the B-C line-line voltage offset
(variable B-C, Voltage offset) is too large.
B-C, Voltage offset is the output of an automatic voltage offset calculation.
The trip fault only occurs when the offset calculation is not active.
B-C voltage offset evaluates B-C voltage feedback information collected while
the power bridge is turned off, when voltage feedbacks should be zero. It
uses the information to detect power bridge and feedback circuitry problems.
105 Pulse tst config bad Trip The Pulse tst config bad trip fault occurs when the pulse test configuration
parameters are invalid and the pulse test is invoked. The purpose of the fault
is to prevent the pulse test from running under poorly defined conditions.
Primary causes:
One or more of the following parameters is negative: Pulse 1 on time, Mid
pulse off time, Pulse 2 on time, Post pulse off time.
106 Ckt board list fail Trip The Ckt board list fail trip fault occurs when the electronic board ID
interrogation which happens during drive initialization fails. Each circuit board
in the rack has an electronic ID.
Ckt board list fail requires a hard reset to clear.
Primary causes:
A circuit board is not seated properly in its backplane sockets.
The electronic ID part on a circuit board has experienced a failure.
107 Motor volt offs high Alarm The Motor volt offs high alarm occurs when the line-line voltage offset
measurements are invalid when the drive is started. Generally the alarm
occurs when the drive is stopped and quickly started again.
The voltage offsets are represented by variables A-B, Voltage offset and B-C,
Voltage offset. They are the outputs of automatic voltage offset
measurements. They are valid for a certain length of time after the
measurements are performed.
The voltage offset measurements are performed when the drive is started and
enough time has elapsed to cause the previous voltage offset measurements
to be invalid. However, there is an exception to this statement. The offset
measurements are not performed during the flux decay time, which begins
when the drive is stopped and continues for 8 rotor time constants.
When the drive is started during the flux decay time, and the previous offset
measurements are invalid because too much time has elapsed since they
were performed, the Motor volt offs high alarm occurs.
Related functions:
Line-Line Voltage Protection
108 DC bus voltage low Alarm The DC bus voltage low alarm occurs when the DC link voltage feedback
(variable DC bus voltage) is too low.
The alarm clears when the DC link voltage feedback rises to an acceptable
voltage, which is the under voltage threshold plus a hysteresis voltage.
DC bus voltage low only occurs when the drive is stopped.
Possible board failures:
FOSA
DSPX