Troubleshooting and Maintenance
5
5-4 | UR11
The rectifiers require low maintenance when properly installed and operated.
Besides the periodic cleaning of the heatsink fins, it is recommended to exchange the fans after 50.000 hours
operation.
shows the UR11 fans exchanging procedure. It is recommended periodic
inspections to be performed every 6 months after rectifier start-up.
Table 5.4 -
Recommended periodic inspections - Every 6 months
Component
Problem
Corrective Action
Terminals, connectors.
Loose screws.
Tighten.
Loose connectors.
Fans / Cooling system.
Dirty fans.
Cleaning.
Abnormal acoustic noise.
Replace fan. Refer to
Check the fan connection.
Blocked fan.
Abnormal vibration.
Dust in the cabinet air filter.
Cleaning or replacement.
Printed circuit boards.
Accumulation of dust, oil, humidity, etc.
Cleaning.
Odor.
Replacement.
Power module /
Power connections.
Accumulation of dust, oil, humidity, etc.
Cleaning.
Loose connection screws.
Tighten.
Heatsink.
Dust accumulation.
Cleaning.
Dirty.
Fans
Rails for fan sliding
Lock system for fast fan
replacement
Figure 5.1 -
Fan replacement
