Inverter Overheat; Motor Over Temperature; Over Temperature Cooled Down; Over Speed - KEB COMBIVERT F5 Instruction Manual

Display
The heat sink temperature rises
Inverter
overheat
The external motor temperature
Motor over
temperature
Over temperature reset possible
Over temperature
cooled down
Error over speed
Over speed
This occurs for a short time dur-
ing the power up of the drive, but
will clear automatically if every-
DC Bus
thing is OK
charging error
Error signal loss or during
absolute position search: wrong
rotation direction or too much
Encoder signal
drag
loss
Description
above the permissible limit
(see technical data)
sensor tripped
Error Messages
Cause and Solution
• Insufficient cooling – increase the airflow
around the inverter
• Ambient temperature is too high - add a
cabinet cooler
• Fan is clogged – clean fan
• The heatsink temp can be viewed in ru.38
• Resistance at the terminals T1/T2 > 1650 Ohm
• Motor temperature sensor indicating an over-
heated motor
• Factory jumper between T1/T2 missing
• Internal or external temperature has dropped
to a safe level. Error "E.OH" can be reset.
• Speed was greater than 110% of the contract
speed entered in LF.20. Speed is measured by
the motor encoder.
• Verify motor data LF.10 – LF.1 and LF.27
• If the encoder position in LF.77 is wrong this
error can occur on starting.
• Electrical noise on the encoder cable can also
cause this error.
• When driving a PM motor, if parameter LF.14
is adjusted too high, E.OS may be triggered at
the beginning of the run.
• Input voltage is wrong or to low
• Braking resistor connected to the wrong termi-
nals or braking transistor is not functioning
• Hardware failure –replace inverter
• One or more of the signals A+, A-, B+, B-, Z+,
Z- are missing.
• One or more of the differential signals is
latched, i.e. both A+ and A- at are +5V at the
same time. Check the encoder connections
as well as the signal levels. All + and - signals
should be opposite ( 0V and >2.0V) while the
motor is standing still.
• If learning encoder position on a PM motor
verify brake is picking fully. Or if the ropes are
on try moving the car to a different part of the
hoist way. Lastly the PM motor phasing may
be incorrect.
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