144
MG.30.A7.02 - VLT
®
is a registered Danfoss trademark
Symptom
Motor stationary, light
in display, but no fault
message displayed
Start the VLT
®
frequency
converter by pressing
Start
on the keyboard.
Is the display frozen,
i.e. the display cannot
be changed or is
undefinable?
No
Yes
Check whether the
following precautions have
been taken!
•
Have screened cables
been used?
•
Are the screened cables
connected correctly?
Yes
19)
20)
21)
22)
Is the motor connected
correctly and are all
motor phases OK?
Yes
The frequency converter
must be set to run using
local references.
The parameter settings
must be changed thus:
parameter 003 = local
parameter 004 =
reference change by
means of
+
and
–
.
Is the motor running?
Yes
No
Check whether the control
signals to the control card
are OK.
23)
24)
25)
Call Danfoss
for assistance
26)
Fault location
