Danfoss VLT 3032 Service Manual page 39

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 13.
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.
I