
96
7
MAINTENANCE
7.2.1 - CLEANING IN-
STRUCTIONS
When it is necessary to clean the Soft-Starter folow these
guidelines:
a) Cooling system:
Switch OFF Soft-Starter power supply.
Remove all the dust located on the ventilation openings
of the enclosure using a plastic brush or flannel.
Remove all the dust accumulated on the heatsink fins
and fans using compressed air.
b)Printed circuit boards (PCBs):
Switch OFF Soft-Starter power supply.
Remove all the dust or moisture accumulated on the
board using a anti-static brush and/or a compressed air
ion gun (ex: charger buster ion gun (non-nuclear) Ref.
A6030-6 from DESCO). If necessary remove PCBs from
the Soft-Starter.
1. Disconnect power supply of the Soft-Starter.
DANGER!
Disconnect always the supply voltage before attempting to
service any electric component of the Soft-Starter.
Even after switching OFF the Soft-Starter, during a certain
time high voltages may be present. Thus wait 3 minutes to
allow a complete discharge of the power capacitors.
2. Open the enclosure of the Soft-Starter.
3. Find the fuse on the board CCS3 and replace it by the type
specified in the spare parts list.
4. Close the Soft-Starter.
7.3 - CHANGING
SUPPLY FUSE