4.5 Fault Symptoms
4.5.1 No Display
The LCP display provides 2 display indications. One with
the backlit alphanumeric display. The other is 3 LED
indicator lights near the bottom of the LCP.
Illustration 4.1 LED Indicator Lights
If the green power-on LED is illuminated, but the backlit
display is dark, it indicates that the LCP is defective and
must be replaced. Be certain, however, that the display is
dark.
A single character or just a dot in the upper corner of the
LCP indicates that communications may have failed with
the control card. This situation typically appears when a
eldbus communication option has been installed in the
frequency converter and is either not connected properly
or is malfunctioning.
If neither indication is available, then the source of the
problem is elsewhere. Proceed to the next troubleshooting
steps.
4.5.2 Intermittent Display
Cutting out or ashing of the entire display and power LED
indicates that the supply (SMPS) is shutting down due to
overload. Improper control wiring or a fault within the
frequency converter itself can cause the overload.
The rst step is to rule out a problem in the control wiring.
To do so, disconnect all control wiring by unscrewing or
unplugging the control terminal blocks from the control
card.
If the display stays lit, the problem is in the control wiring
(external to the frequency converter). Check all control
wiring for short circuits or incorrect connections.
If the display continues to cut out, follow the procedure for
chapter 4.5.1 No Display as though the display was not lit
at all.
4.5.3 Display (Line 2) Flashing
When line 2 ashes, it indicates that an LCP stop command
has been given by pressing
[O/Reset].
The frequency
converter cannot accept any further run command until
the LCP stop is cleared. To clear the LCP stop, press [Auto
On] or [Hand On].
CAUTION
IMMEDIATE START
If the frequency converter is operated in local control, or
remote control with a maintained run signal, the
frequency converter starts immediately. Failure to be
prepared for immediate start can cause personal injury.
•
Be prepared for immediate start.
4.5.4 WRONG or WRONG LCP Shown
The message WRONG or WRONG LCP appears due to a
faulty LCP or the use of an incorrect LCP.
Replace the LCP with a correct and functioning one.
NOTICE
Error 84 appears when the LCP cannot communicate
with the frequency converter.
4.5.5 Motor Will Not Run
If this symptom is detected, verify that the unit is properly
powered up (display is lit) and that there are no warning
or alarm messages displayed. The most common cause of
this problem is either incorrect control logic or an
incorrectly programmed frequency converter. Such
occurrences result in one or more of the following status
messages being displayed.
LCP Stop
[O]
has been pressed. Line 2 of the display also
ashes
when this situation occurs.
Press [Auto On] or [Hand On]. Refer to the Input Terminal
Signal Test.
Standby
This message indicates that there is no start signal at
terminal 18.
Ensure that a start command is present at terminal 18.
Refer to the Input Terminal Signal Test.
Troubleshooting
30 02/2017 All rights reserved. BAS-SVM04B-EN
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