CHAPTER 8- DIAGNOSTICS ANDTROUBLESHOOTING
144
8.4 PREVENTIVE
MAINTNANCE
DANGER!
Always disconnectthe mainpower supplybefore touching anyelectrical
component associated to the SSW-06 Soft-Starter
High voltages can be present even after the power supply has been
disconnected. Wait at least 3 minutes for the complete discharge of
the power capacitors.
Always connect the equipment frame to the protection earth (PE) at
the correct point for this.
ATTENTION!
Electronic boards have components sensitive to electrostatic
discharges.
Never touch the componentsorconnectors directly. Ifthis isunavoidable,
first touch the metallic frame or use a suitable ground strap.
To avoid operation problems caused byharshambient conditions, such
as high temperature, moisture, dirt, vibration or premature aging of the
components, periodic inspections of the Soft-Starters SSW-06 and
installations are recommended. .
Never apply a high voltage test on the Soft-Starter SSW-06!
If this is necessary, contact WEG.
COMPONENT PROBLEMS CORRECTIVEACTIONS
Terminal blocks, connectors Loose screws Tighten them
(2)
Loose connectors
Blowers
(1)
/ Cooling Blowers are dirty Clean them
(2)
System Abnormal acoustic noise Replace the blower
Blower is not running
Abnormal vibration
Dust in the air filters Clean or replace them
(4)
Printed circuit boards Dust, oil or moisture accumulation Clean them
(2)
Smell Replace them
Power module/ Dust, oil ormoisture accumulation, etc. Clean them
(2)
power connections Connection screws are loose Tighten them
(2)
Power resistor Discoloration Replace it
Smell
Table 8.3 - Periodic Inspections after Start-up
Notes:
(1) It is recommended to replace the blowers after each 40,000 hours
of operation;
(2) Check the capacitors everysixmonths. Itis recommendedtoreplace
them after five years of operation;
(3) When the SSW-06 Soft-Starter is stored for a long period of time, it
is recommended that it beenergizedfor 1 hour, in each intervalof 1
year.
(4) Two times per month.
Do not use Megohmmeter for the Thyristor testing.
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