Danfoss VLT Series Service Manual page 16

Section Two
18)
Motor stationary, info in
display but no fault
message displayed
CAUTION:
Prior to running in Local,
insure all other equipment
associated with the VLT is
ready to function
or has been isolated.
2 - 8
19)
Start VLT by pressing Start
on the keypad.
20)
Is the display frozen, i.e., the
display cannot be changed
or is undefinable?
NO YES
22)
Is the motor connected
correctly/
YES NO
23)
Try to run the VLT in local.
Refer to CAUTION at left.
Local control parameters.
On VLT Series 3000:
003 = Local
004 = Frequency reference
change by means of + and –
On VLT Series 3500:
003 = keypad HOA
Press the Local/Hand key
change speed by the + and –
Does the motor run?
YES NO
24)
Verify that the control signals
are connected to the correct
terminals and the appropriate
parameter settings have
been entered.
21)
Replace the Control Card, 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?
Correct the motor wiring.
Insure motor overloads are
reset and output contactor
closed.
25)
Replace Control Card.
Does the motor run?
NO
26)
Replace Interface/ILD Card.
Does the motor run?
NO
27)
Consult factory.