Low Speed Overload; Encoder Signal Loss; Dc Bus Charging Error; 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 during
the power up of the drive, but will
clear automatically if everything is
DC Bus
OK
Charging Error
Error encoder failure

Encoder Failure

Error signal loss or signal not
correct
Encoder Signal
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
• 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.
• Car speed was greater than 110% of the
contract speed. Speed is measured by the
motor encoder.
• Check for mechanical problems
• Verify motor data LF.10 – LF.19
• Input voltage is wrong or to low
• High resistance in the supply line
• Braking resistor connected to the wrong termi-
nals
• Braking transistor is not functioning
• Hardware failure –replace inverter
• Encoder not connected electrically - Verify all
encoder connections and signals.
• Encoder channels reversed – see LF28
• Motor torque is at the limit and the act speed is
zero, only at starting -increase the value of
LF.36 and check for brake overlap.
• 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 - signal
should be opposite ( 0V and >2.0V) while the
motor is standing still.
US
91