KEB COMBIVERT F5, Reference Manual, Page: 276 / 349

276
Diagnostics and Troubleshooting
*Additional information at end of section
Error/Message Alt. /
(NUM)
Description Cause/Solution/Troubleshoot
Error Overload
Low Speed EOL2
(19) Occurs if the
low frequency,
standstill constant
current is
exceeded (see
Technical
Data for stall
current levels
and overload
characteristics).
The error can
only be reset if
the
cooling time
has elapsed
and E.nOL2 is
displayed.
The cause of the Overload Low Speed would be due
to excessive current at low speed (typically below 3Hz).
The following may be causes of excessive current:
Incorrect motor data.
Verify motor dat a, specifically the motor rated speed
and frequency relationship (Diagnostic Screen #12)
for PM Synchronous Motors (see Section 5.5.2,
LM02 or LM04, for details).
Verify correct encoder settings including:
LE02 Encoder Pulse Number
LE03 Swap Encoder Channels (A/B setting)
LE06 Encoder Pole position for PM Synchronous
Motors. Relearn Encoder Pole Position as needed
(see Section 5.10.1 or 5.10.2).
High mechanical load/issues (friction).
Error Motor
Overheat EdOH
(9) The external
motor
temperature
sensor tripped. If a motor PTC temperature sensor, relay, or KTY (special
hardware required) is connected to terminals T1, T2 and
the motor overheat function LX10 EdOH Function = On,
then if the PTC resistance exceeds 1650 Ohms, relay
opens, or the KTY sensor is above the set value in LM10
Motor Overload temp, then a motor overheat is detected.
Cause of excessive motor heating may include:
Excessive current.
Verify correct motor data.
Verify correct encoder settings including:
LE02 Encoder Pulse Number
LE03 Swap Encoder Channels (A/B setting)
LE06 Encoder Pole position for PM Synchronous
Motors.
High mechanical load/issues (friction).
Insufficient motor cooling.