CHAPTER 8 - DIAGNOSTICS AND TROUBLESHOOTING
170
8.4
PREVENTIVE
MAINTENANCE
DANGER!
Always disconnect the main power supply before touching any elec-
trical 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 dis-
charges.
Never touch the components or connectors directly. If this is unavoi-
dable, first touch the metallic frame or use a suitable ground strap.
To avoid operation problems caused by harsh ambient 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.
When the SSW-06 Soft-Starter is stored for a long period of time, it is
recommended that it be energized for 1 hour, each year.
Never apply a high voltage test on the Soft-Starter SSW-06!
If this is necessary, contact WEG.
COMPONENT
PROBLEMS
CORRECTIVE ACTIONS
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
(3)
Printed circuit boards
Dust, oil or moisture accumulation, etc.
Clean them
(2)
Smell
Replace them
Power module/
Dust, oil or moisture 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)
Twice a year.
(3)
Twice a month.
Do not use a Megohmmeter for the Thyristor testing.
For further information, training or service, please contact the Technical
Assistance or Distributor closest to you.
Summary of Contents for SSW06
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