CFW300 | 29
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Troubleshooting and Maintenance
Table 6.3: Recommended periodic inspections - every 6 months
Component Abnormality Corrective Action
Terminals, connectors Loose screws Tighten
Loose connectors
Fans / Cooling systems
(*)
Dirty fans Clean
Abnormal acoustic noise Replace the fan
Blocked fan Clean or replace
Abnormal vibration
Dust in the cabinet air filter
Printed circuits boards Accumulation of dust, oil, humidity, etc. Clean
Odor Replace
Power module / Power
connections
Accumulation of dust, oil, humidity, etc. Clean
Loose connections screws Tighten
DC Link capacitors Discoloration / odor / electrolyte leakage Replace
Expanded or broken safety valve
Frame size expansion
Power resistors Discoloration Replace
Odor
Heatsink Accumulation of dust Clean
Dirt
(*) The CFW300 fan can be easily replaced as shown in Figure A5 on page 112.
6.5 CLEANING INSTRUCTIONS
When it is necessary to clean the inverter, follow the instructions below:
Ventilation system:
Disconnect the inverter power supply and wait for 10 minutes.
Remove the dust from the cooling air inlet by using a soft brush or cloth.
Remove the dust from the fan blades by using compressed air.
Cards:
Disconnect the power supply of the inverter and wait for 10 minutes.
Disconnect all the cables of the inverter, identifying all of them in order to reconnect them
correctly.
Remove the plastic cover and the plug-in module (refer to Chapter 3 INSTALLATION AND
CONNECTION on page 9 and APPENDIX B - TECHNICAL SPECIFICATIONS on page
113).
Remove the dust accumulated on the cards using and anti-static brush using and/or ion
compressed air gun.
Always use grounding strap.
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