KEB COMBIVERT F5 Reference Manual page 276

Diagnostics and Troubleshooting
Error/Message Alt. /
(NUM)
Error Overload EOL2
Low Speed (19)
Error Motor EdOH
Overheat (9)
276
*Additional information at end of section
Description Cause/Solution/Troubleshoot
Occurs if the The cause of the Overload Low Speed would be due
low frequency, to excessive current at low speed (typically below 3Hz).
standstill constant The following may be causes of excessive current:
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 external If a motor PTC temperature sensor, relay, or KTY (special
motor hardware required) is connected to terminals T1, T2 and
temperature the motor overheat function LX10 EdOH Function = On,
sensor tripped. 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:
Insufficient motor cooling.
Incorrect motor data.
Verify motor data, 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).
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).