KEB COMBIVERT F5 Operation Manual page 93

Error/Message Alt.
(NUM)
Error Initializa- EInI
tion MFC (57)
Error Low Mo- Ebr
tor Current (56)
/ Description
Control card pro-
cessor unable to
boot.
Error current
check.
Prior to every run
the drive sends
current to each
phase of the mo-
tor to verify the
connection. Af-
terward, the drive
applies magnetiz-
ing current (In-
duction Motors)
and monitors
whether the mo-
tor is magnetized
or not.
Cause/Solution/Troubleshoot
Replace control card.
Possible causes for low motor current error during cur-
rent check:
Motor contactor contacts are burnt or damaged.
Bypass motor contactor (do not simply jumper!) to
test and replace as needed.
One or more motor leads is not connected.
Motor contactor is not closing or not closing in time
Bypass motor contactor or verify switching time.
Motor windings are damaged.
Measure motor resistance.
The phase current check can be bypassed by setting
LX08 = Magnetizing Current Check (Induction Motors
only).
If the error occurs when trying to run on open loop, in-
crease LC32 Low Speed Torque Boost; suggested value
is 5%.
Drive Faults
93