Danfoss VLT CDS 302 Посібник з усунення несправностей - Сторінка 8
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Check List
Fault Symptoms - Display
of the drive
No display (blank display)
Figure 3: No Display in the
LCP (blank)
Intermittent display
Figure 4: intermittent
display
8
FRCC.PC.036.A2.02
Trouble shooting
A fault must have been ocurred when there is:
a) No Display in the LCP (blank)
b) Intermittent display in the LCP
There are three LED indicators lights near the
bottom of the LCP.
If the green power on LED is illuminated but the
backlit display is dark, this indicates that the LCP
itself is defective and must be replaced.
It should be certain that the display is completely
dark. An error code exists in the drive which
Cutting out or flashing of the entire display and
power LED indicates that the power supply
(SMPS) is shutting down as a result of being
overloaded.
indicates that communications may have failed
with the control card.
This is typically seen when an option card has
been installed in the drive and is either not
connected properly or is malfunctioning.
• If neither indication is available, then the
source of the problem may be elsewhere.
This may be due to improper control wiring or a
fault within the drive itself.