Troubleshooting and Maintenance
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CTW900 | 137
8.2
PREVENTIVE MAINTENANCE
When installed in proper environments and operating conditions, the CTW900 requires little maintenance. Table
8.1 provides the recommended inspections to be performed every 6 months after the start-up.
DANGER!
■
Always disconnect the general power supply before touching any electrical component
connected to the converter.
■
High voltages may be present even after the disconnection of the power supply; wait for at least
ten minutes for the full discharge of the capacitors.
■
Always connect the equipment frame to the protective ground (PE). Use the adequate
connection terminal at the inverter.
ATTENTION!
Electronic boards have components sensitive to electrostatic discharges.
Do not touch the components or connectors directly. If necessary, first touch the grounded
metallic frame or wear a proper ground strap.
Do not carry out any applied potential test on the converter!
If necessary, consult WEG.
Table 8.1
– Periodic inspections every six months
Component
Abnormality
Corrective Action
Terminals, Connectors
Screws loose
Tighten
Connectors loose
Fans
(1)
Dirt
Clean
Abnormal noise
Replace fan
Fan stopped
Abnormal vibration
Printed Circuit Boards
Dust, oil, moisture buildup
Clean
Smell
Replace
Power Module/Power
Connections
Dust, oil, moisture buildup
Clean
Connection screws loose
Tighten
Heatsink
Dust, dirt buildup
Clean
(1)
It is recommended to replace the fans after 40,000 hours of operation. Check the number of
time powered in P0042.
8.2.1
Cleaning Instructions
When you need to clean converter, follow the instructions below.
Ventilation system:
■
Disconnect the converter power supply and wait for 10 minutes.
■
Remove the dust from the cooling air inlets with a soft brush or cloth.
■
Remove the dust from the heatsink fins and from the fan blades with compressed air.
Electronic boards:
■
Disconnect the converter power supply and wait for 10 minutes.
■
Remove the dust accumulated on the boards using and anti-static brush using and/or ion compressed air
gun. Example: Charges Burtes Ion Gun (non nuclear, reference A6030-6DESCO).
■
If necessary, remove the board from inside the converter, but always use a grounding strap.
Содержание CTW900
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