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CHAPTER 7 - DIAGNOSTICS AND TROUBLESHOOTING
Table 7.1 - Periodic inspection after start-up
7.4.1 Cleaning
Instructions
When required to clean the inverter, flow the instructions below:
a) Cooling System:
Remove AC power from the inverter and wait 10 minutes.
Remove all dust from ventilation openings by using a plastic brush
or a soft cloth.
Remove dust accumulated on the heatsink fins and from the blower
blades with compressed air.
b) Electronic Boards:
Remove AC power from the inverter and wait 10 minutes.
Disconnect the inverter cables, ensuring that they are marked
carefully to facilitate later reconnection.
Remove all dust from the printed circuit boards by using an anti-
static soft brush and/or remove it with an ionized compressed air
gun; (for example: Charges Burtes Ion Gun (non nuclear) Ref.
A6030-6 DESCO).
(1) It is recommended to change the fans after 40.000 operation hours.
COMPONENTS PROBLEMS CORRECTIVE ACTIONS
Terminal blocks Loose screws Tighten them
Loose connectors
Printed circuit boards Dust, oil or moisture accumulation Clean them and/or replace them
Smell Replace them
Fans
(1)
/ Cooling System Dirty fan Clean fan
Unusual acoustic noise Change fan
Stopped fan
Unusual vibration
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