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bASIc SAfETy INSTRUcTIONS
Switching on the input
For applications that require cyclic switching on and off of the drive converter, maintain
an off-time of at least 5 min after the last switch on. If you require shorter cycle times
please contact KEB Automation KG.
Short-circuit proof
The drive converters are conditional short-circuit proof. After resetting the internal pro-
tection devices, the function as directed is guaranteed.
Exceptions:
• If an earth-leakage fault or short-circuit often occurs at the output, this can lead to a
defect in the unit.
• If a short-circuit occurs during regenerative operation (2nd or 4th quadrant, regen-
eration into the DC link), this can lead to a defect in the unit.
1.6 Maintenance
The following maintenance work has to be carried out when required, but at least once
per year by authorized and trained personnel.
►
Check unit for loose screws and plugs and tighten if necessary.
►
Clean drive converter from dirt and dust deposits. Pay attention especially to cool-
ing fins and protective grid of the fans.
► Examine and clean extracted air filter and cooling air filter of the control cabinet.
►
Check the function of the fans of the drive converter. The fan must be replaced in
case of audible vibrations or squeak.
►
Make a visual leak test of the cooling circuit for water-cooled inverters.
1.7 Repair
In case of malfunction, unusual noises or smells inform a person in charge!
DANGER
Unauthorized exchange, repair and modifications!
Unpredictable malfunctions!
►
The function of the drive converter is dependent on its parameteriza-
tion. Never replace without knowledge of the application.
► Modification or repair is permitted only by
KEB Automation KG au-
thorized personnel.
►
Only use original manufacturer parts.
►
Infringement will annul the liability for resulting consequences.
In case of failure, please contact the machine manufacturer. Only the machine manu-
facturer knows the parameterisation of the used drive converter and can provide an
appropriate replacement or induce the maintenance.
