13
Protective Functions
(Note 3) Details of the latest error are displayed
(Note 4) is displayed when there is no error.
Protective Functions
(Note 1) Press the reset key 10 seconds after the alarm has occurred.
(Note 2) If an EEPROM error occurs, be sure to comfirm the seting value again.
Name Description
Digital panel/
Digital operator
Remote
operator
ERR1****
Overcurrent
protection
Overload protection
(Note 1)
Overvoltage
protection
EEPROM error
(Note 2)
Undervoltage
protection
CPU error
External trip
USP error
Ground fault protection
Input overvoltage protection
Thermal protection
Undervoltage wait condition
When output of an inverter is short circuited, the motor is
locked or drive sees sudden heavy load, the inverter output
current exceeds a certain level, and the inverter output is cut
off.
When a motor overload is detected by the electronic thermal function,
the output of the inverter is cut off.
OC.Drive
E07
OC.Decel
OC.Accel
Over.c
Over.L
Over.V
EEPROM
Under.V
CPU1
CPU2
EXTERNAL
USP
GND.Fit
OV.SRC
OH FIN
UV.WAIT
When the inverter DC bus voltage exceeds a certain level due to
regenerative energy from the motor, this protection engages and the
output of the inverter is cut off.
When the built-in memory has problems due to noise or excessive temperature
rise, this protection engages and the output of the inverter is cut off.
Output is cut off when the DC bus voltage goes down below a certain level.
Low DC bus voltage of an inverter causes improper function of the control
circuit, generates the motor heat and causes low torque. Trip level is
approximately 150-160V for 200V Class and 300-320V for 400V Class.
Malfunction or error of the built-in CPU causes this fault and shuts the
inverter output off.
A fault indication from external equipment signals an intelligent input terminal
programmed for External Trip to cut off the output of the inverter.
With USP function enabled through the intelligent terminal, a run command
when power comes on causes this fault.
At power up, the inverter looks for ground fault at the motor output terminals.
This protection is provided for the inverter and not for operator safety.
When the input voltage is higher than the specified value, inverter responds to this
100 seconds after power up by faulting and by cutting off the output. The detection
level is approximately 258V for 200V Class and 516V for 400V Class.
When thermal sensor in the inverter detects high temperature in the power
module, the inverter trips and shuts output off.
The drive shuts output and waits when input voltage drops below a specific
value.
Trip Monitoring Method
Trip History Monitoring Method
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