20
18)
Symptom
Motor stopped. Light in
display, but no fault report.
19)
Start the VLT adjustable
frequency drive by
pressing "Start" on the
control panel.
20)
Has the display locked, i.e.
it cannot be changed or is
illegible?
Correct the motor wiring
Insure motor overloads are
seset and output contactor
closed.
NO
21)
Replace the Control Card,
see page 31. If this does
not help, the fault might be
electrical noise. Check
whether the following
precautions have been
taken:
• Have shielded cables
been used?
• Are the shields correctly
terminated?
• Is the unit properly
grounded to earth?
NO YES
Consult
factory
26)
Replace the Interface/ILD
card, see page 31.
Does the motor run?
YES NO
23)
Attempt to run the VLT in
local.
SEE CAUTION at LEFT
Make the following
parameter settings:
Parameter 003 = Local
Parameter 004 = Fref.
Change by means of
+ and – keys.
Does the motor run?
22)
Has the motor been
correctly connected and
are all motor phases in
order?
YES NO
CAUTION:
Prior to running in Local,
insure all other
equipment associated
with the VLT is ready to
function or has been
isolated
25)
Replace the Control card,
see page 31.
Does the motor run?
NO
24)
Verify that the control
signals are connected to
the correct terminals and
the appropriate parameter
settings have been
entered.