VLT
®
FCD Series
NB!:
When restarting after an alarm 38–45, the VLT
frequency converter will display an alarm 37.
In parameter 615 the actual alarm code can be read.
ALARM 50: AMT not possible
One of the following three possibilities can occur:
- The calculated R
S
value falls outside permitted
limits.
- The motor current in at least one of the motor
phases is too low.
- The motor in use is probably too small for AMT
calculations to be performed.
ALARM 51: AMT Fault re. nameplate data
There is inconsistency between the registered motor
data. Check the motor data for the relevant setup.
ALARM 54: AMT incorrect motor
AMT cannot be performed on the motor being used.
ALARM 55: AMT timeout
Calculations are taking too long, possibly due to
noise on the motor cables.
ALARM 56: AMT warning during AMT
A frequency converter warning is given while AMT is
being performed.
WARNING 99: Locked
See parameter 18.
MG.04.A1.02 - VLT is a registered Danfoss trade mark
128
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