KEB COMBIVERT F5 Reference Manual page 282

Diagnostics and Troubleshooting
Error/Message Alt. /
(NUM)
Error EOS
Overspeed (58)
282
*Additional information at end of section
Description Cause/Solution/Troubleshoot
The internal The inverter internal overspeed is dictated as 110% of
overspeed limit is the US06 Contract Speed. This level is fixed and cannot
exceeded. be adjusted, except for when performing the Overspeed
Test function (refer to parameters LL15, LL16 for further
information).
Possible causes of an overspeed error include:
Incorrect setting of the Machine Data parameters
LN01-03.
The Machine Data parameters are used as a scalar
to convert a linear speed (e.g. ft/min) to a rotary
speed (rpm) used by the inverter. If the machine
data is not set correctly, the overspeed limit may
be calculated too low when control modes which
dictate the drive speed exceed this limit (e.g. it
is possible in Serial Speed control mode for the
controller to command a speed higher than the
overspeed error limit calculated from the machine
data parameters, which could cause inadvertent
overspeed errors).
Lack of control
Maximum Torque limit or peak inverter current
reached.
Monitor the motor current to see if it reaches a
current corresponding to the LC30 Maximum
Torque or the drive Peak Current rating.
Maximum Torque may be set too low (default =
150%; Typical for high speed/full load operation
= 200-250%)
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