Section Five
5 - 6
FAULT MEMORY
The VLT stores faults which have occurred in its fault memory register. The register
stores the last 8 occurrences on a first in first out basis. You can access the fault
memory by calling up parameter 602. In doing so you can then scroll through the
register using the Data key to view each fault code stored. The codes that are
displayed correspond to the numbers in parenthesis printed next to the Alarm
Messages described on page 2-3.
In addition there are six more codes which may appear in parameter 602.
10) Trip Locked
Indicates a trip lock fault has occurred.
11) CT/OP Card Fault
Indicates a software fault has occurred in either the Control Card or an
installed option card.
12) Ref Fit Timeout
Indicates the Reference Fault Timeout has occurred as controlled by
Parameters 414 and 415.
13) Adaptive Tune Fail
Indicates the Adaptive Tuning Process failed, initiated by parameter 106.
14) DC Supply Fault
Indicates one or more of the low voltage DC power supplies have
fallen out of tolerance.
15) Motor Thermistor
Indicates the motor thermistor as selected in parameter 400 has
caused the trip.
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