Maintenance - KEB COMBIVERT F6 Instructions For Use Manual

bASIc SAFeTy INSTrUcTIONS
Switching at the output
Switching between motor and drive converter is prohibited for single drives during op-
eration as this may trigger the protection gear of the device. Function "speed search"
must be activated if switching can not be avoided. Control release may only be triggered
after closing the motor contactor (e.g. by switching the control release).
Connecting and disconnecting is permissible with multiple motor drives if at least 1 mo-
tor is running during the switch-over process. The drive converter must be dimensioned
to the occurring starting currents.
The "speed search" function must be activated if the motor is still running during a restart
of the drive converter (mains on) (e.g. due to large rotating masses).
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:
•
•

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-
► 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
► In the case of liquid-cooled drive converters, make a visual leak test of the cooling
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.
ing fins and protective grid of the fans.
case of audible vibrations or squeaking.
circuit for leaks and corrosion must be carried out.
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