14.3 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
1-phase: 200~240 V
(-10 % / +10 %)
3-phase: 380~480 V
(-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 service engineers
Fan
No color change or deforma-
tion
Replace fan
No blockage or contamina-
tion
Eliminate blockage and clean
fan
Cooling system
(radiator, inlet, outlet)
No blockage or foreign mat-
ters
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. 14-2: Periodic inspection list
Bosch Rexroth AG
Maintenance
EFC 3600
212/259
DOK-RCON03-EFC-3600***-IT03-EN-P
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