10. Protective function
The various functions are provided for the protection of the inverter itself, but
they may also protection function when the inverter breaks down.
Overcurrent
protection
Overload protection
(Electronic thermal)
Regenerative
Over voltage
protection
Communication
error
Under-voltage
protection
Output
short-circuit
USP error
Name
Cause(s)
Error
Code
When the inverter output current exceeds the rated
current by more than approximately 200% during
the motor locked or reduced in speed. Protection
circuit activates, halting inverter output.
When the inverter output current causes the motor
to overload, the electronic thermal trip in the
inverter cuts off the inverter output.
If regenerative energy from the motor or the main
power supply voltage is high, the protective circuit
activates to cut off the inverter output when the
voltage of DC link exceeds the specification
The inverter output is cut off when communication
in the inverter has an error to external noise,
excessive temperature rise, or other factor
When input voltage drops below the low-voltage
detection level, the control circuit does not function
normally. So when the input voltage is below the
specification, the inverter output is cut off.
The inverter output was short-circuited. This con-
dition causes excessive current for the inverter, so
the inverter output is turned off.
The USP error is indicated when the power is
turned on with the inverter in RUN state. (Enabled
when the USP function selected)
The inverter output is cut off when EEPROM in
the inverter has an error due to external noise, exc-
essive temperature rise, or other factor
When the external equipment or unit has an error,
the inverter receives the corresponding signal and
cuts off the output.
When the temperature in the main circuit increases
due to cooling fan stop, the inverter output is cut
off.(only for the model type with cooling fan)
E04
E05
E07
E34
E13
E08
E12
E21
E09
EEPROM error
External trip
Temperature trip
10-1
ENDA E-100
INSTRUCTION MANUAL
E60
