Danfoss MCD3000 Series Manual page 53

Remote Control Input failure
Overview
The MCD3000 soft starter can be operated in Local or
Remote mode. The operational mode is selected using
the LOCAL/REMOTE pushbutton on the front control
panel of the MCD3000.
In local mode the REMOTE LED is not illuminated and
the soft starter is operated using the Start, Stop, and
Reset operational pushbuttons on the MCD3000 front
control panel.
In Remote mode the REMOTE LED is illuminated and
the soft starter is operated using the four remote
control inputs. When a remote control input is closed
using an external contact, the associated remote
control input status LED is illuminated.
MG.15.B2.02 – VLT is a registered Danfoss trademark
MCD3000 Series
Cause of Remote Control Input failure
External contacts used for operating the remote
control inputs must be low current/low voltage types
(gold flash or similar). These inputs are internally
powered by 24VDC an d must only be operated by
external volt free contacts.
Application of external voltages to the
remote control inputs will cause
equipment damage and necessitate
replacement of the Main Control Module.
Testing for Remote Control Input failure
When the MCD3000 soft starter is operated in Remote
mode, the associated remote control input status LED
will illuminate when the input is closed using an
external contact. If the status LED does not illuminate,
damage has occurred to the remote control input on
the Main Control Module.
This damage is caused by applying external voltage,
either directly or indirectly (eg, induced voltage from
lightning strike) to the remote control input.
ATTENTION
Damage to the control inputs caused by
application of external voltages is not covered
by warranty.
53