16.3 Periodic Inspection
In addition to daily inspection, periodic inspection of frequency converters is al-
so necessary. The inspection cycle should be less than 6 months. For operation
details, please see table below:
Inspection
category
Inspection item Inspection criteria Solution
Power supply Voltage Specified in nameplate
1P: 200...240 VAC
(-10 % / +10 %)
3P: 380...480 VAC
(-15 % / +10 %)
Power cable Power cable
No color change or damage
Replace cable
Signal line Signal line Replace signal line
Terminal
connection
Crimp terminal
and cable / line
No loose connection
Tighten crimp
and terminal screw
Crimp terminal
and terminal block
Frequency
converter
Visual
appearance
No deformation Contact with service
Fan
No color change
or deformation
Replace fan
No blockage
or contamination
Eliminate blockage
and clean fan
Cooling system
(radiator, inlet, outlet)
No blockage
or foreign matters
Eliminate blockage
and clear foreign matters
Printed circuit board No dust or oil contamination
Clean printed
circuit board
DC bus capacitor
No leakage, color
change, crack or expansion
with safety valve shut down
Replace DC bus capacitor
(must be operated by service
engineers)
Accessories
Connection No loose connection Tighten terminal screw
Cable No color change or damage Replace cable
Tab. 16-2: Periodic inspection list
Bosch Rexroth AG
Maintenance
EFC x610 Series
316/389
DOK-RCON03-EFC-X610***-IT05-EN-P
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