WEG CFW-09 - Contacting weg; Preventive Maintenance

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CHAPTER 7 - DIAGNOSTICS AND TROUBLESHOOTING
Never apply a high voltage test on the inverter!
If this is necessary, contact WEG.
To avoid operation problems caused by harsh ambient conditions, such as
hightemperature,moisture,dirt,vibrationorprematureagingof thecomponents,
periodic inspections of the inverter and installations are recommended.
DANGER!
Always disconnect the power supplyvoltage before touching anycomponent
of the inverter.
Even after switching OFF the inverter, high voltages maybe present. Wait 10
minutes to allow complete discharge of the power capacitors.
Always connect the equipment frame to a suitable ground (PE) point.
ATTENTION!
Electronic boards have components sensitive to electrostatic discharges.
Never touch the components or connectors directly. If this is unavoidable,first
touch the metallic frame or use a suitable ground strap.
7.4
PREVENTIVE
MAINTENANCE
NOTE!
When contacting WEG for service or technical assistance, please have the
following data on hand:
InverterModel;
Serial number, manufacturing date and hardwarerevision, as indicated
on the inverter nameplate (Refer to
item
2.4);
Software Version (Refer to
item
2.2);
Informationabout the applicationand inverter programming.
7.3
CONTACTING
WEG
COMPONENT
PROBLEMS
CORRECTIVEACTIONS
Terminal Blocks, Connectors
Loose screws
Tighten them
Loose connectors
Blowers
(1)
/ Cooling System
Blowers are dirty
Cleanthem
Abnormal acoustic noise
Replace the blower
Blower is not running
Abnormal vibration
Dust in the air filters
Clean or replace them
Printed Circuit Boards
Dust, oil or moisture accumulation
Cleanthem
Smell
Replace them
Power Module
(3)
/ Power Connections
Dust, oil or moisture accumulation, etc.
Cleanthem
Connection screws are loose
Tighten them
DC Bus Capacitors
(2)
Discoloration / smell / electrolyte leakage
Replace them
Safety valve is expanded or broken
Deformation
Power Resistor
Discoloration
Replace it
Smell
Table 7.3
- Periodic inspections after start-up