Danfoss VLT 3000 Series Product Manual page 143

8)
Symptom
No message or
backlight in display
Fault location
9)
Have pre-fuses for the
VLT frequency converter
®
blown?
No
13)
Is the control card
overloaded? Disconnect
all control signal plugs
on the control card.
Does the fault disappear?
No
15)
Call Danfoss
for assistance
®
MG.30.A7.02 - VLT is a registered Danfoss trademark
Yes
only VLT types 3060 - 3250
®
Yes
10)
Call Danfoss
for assistance
11)
Have the built-in mains
fuses blown?
Yes
12)
Call Danfoss
for assistance
14)
Ensure that the previous
points are OK:
The fault can be caused
by short-circuiting on the
control signals.
The 24 V supply might
be short-circuited.
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