Motion Control Engineering Motion 3000ES

Fault Conditions
61
KEB Drive Faults
Note
The drive faults listed here are current as of publication of these tables. If you believe that a
description is not accurate, please consult the manufacturer manual shipped with the drive.
Table 21. KEB Drive Error Displays
Display Description Cause
E. UP
Under voltage. DC bus voltage below per-
missible value; input single-phasing; phase
imbalance greater than 2%.
• Input voltage low or unstable.
• Input wiring incorrect.
• Isolation transformer too small.
• Isolation transformer connected wrong.
• One phase of input missing.
• Phase imbalance over 2%.
E. OP
Over voltage. DC bus voltage above per-
missible value during motor regenerative
operation or because of line side voltage
spikes.
• Input voltage too high; install step down tx.
• Voltage spikes on line; install line choke.
• Brake resistor connection incorrect.
• Brake resistor resistance too large.
• Inverter poorly grounded.
E. OC
Peak output current exceeded or ground
fault.
• Short circuit on motor leads.
• Ground fault on motor leads.
• Motor contactor damaged or burned.
• Inverter poorly grounded.
• Incorrect motor data (LF10-LF19).
• Shorted output transistor.
E. OL
Time dependent overload. See KEB man-
ual.
• Motor wired incorrectly.
• Motor data wrong (check motor current).
• Inverter too small.
• High mechanical load.
E.OL2
Time dependent overload at low speed. See
KEB manual.
• Motor stand still current too high.
• Incorrect motor data.
• Inverter too small.
• High mechanical load.
• Motor wired incorrectly.
E.nOL
Cool down phase completed (after an E.OL
or E.OL2 error).
• E.OL or E. OL2 errors can now be reset.
E. OH
Inverter overheat. Heat sink temperature
above permissible limit.
• Insufficient cooling.
• Ambient temperature too high.
• Cooling fan clogged.
E.dOH
Motor over temp. External motor temp
switch tripped.
• Terminals T1/T2 resistance over 1650 ohms.
• Motor temp sensor overheat.
• Factory T1/T2 jumper missing.
E.nOH
Overtemp cooled down. Over temp error
may now be reset.
• Temperature now at safe level.
E. 0S Over speed.
• Speed over 110% of LF.20.
• Verify LF.10 - LF.19, LF.27.
• Encoder cable noise.