8-11
Name Description
LED
monitor
displays
*1
Alarm
output
[30A/B/C]
Motor
protection
Electronic
thermal
The inverter is stopped upon an electronic thermal function setting
to protect the motor. The standard motor and the inverter motor are
protected in the range of all the frequencies. The operation level
and thermal time constant can be set.
0l1
Yes
PTC
thermistor
A PTC thermistor input stops the inverter to protect the motor. The
PTC thermistor is connected between terminals V2 and 11 to set
switch on the control PC board and function codes.
0h4
Yes
Alarm relay
output
(for any alarm)
- The inverter outputs a relay contact signal when the inverter issues an alarm
and stops the inverter output.
< Alarm Reset >
The alarm stop state is reset by pressing the
key on the multi-function
keypad (option) or by the digital input signal RST.
— Yes
Memory error Data is checked upon power-on and writing to detect any fault in the memory and
to stop the inverter if any.
er1
Yes
Keypad
communication
error
Multi-function keypad (option) is used to detect a communication fault between
the keypad and inverter main body during operation and so on and stop the
inverter if any.
er2
Yes
CPU error Detect a CPU error caused by noise and so on and stops the inverter.
er3
Yes
Option
communication
error
When PG option card is used, a fault of communication with the inverter main
body is detected to stop the inverter.
er4
Yes
Option error When each option card is used, the option side detects a fault to stop the
inverter.
er5
Yes
Operation
error
Brake
status
error
If the braked status input BR KE does not follow the brake command
BRKS, the inverter stops.
er6
Yes
Speed
command
error
Attempting to drive the inverter with the same speed data being set
up in any of multistep speed commands (L11 to L18) stops the
inverter.
MC status
error
If the MC status input CS-MC does not follow the MC command
SW52-2, the inverter stops.
Tuning error When tuning failure, interruption, or any fault as a result of tuning is detected
while tuning the motor constant, the inverter is stopped.
er7
Yes
RS485
communication
error
When the connection port of the keypad is connected via RS485 communication
to the network to detect a communication error, the inverter is stopped to display
the error.
er8
Yes
Hardware error
(option
detection)
When using the option card upon an error in the option or due to a loose
mounting of the card being detected the inverter stops itself.
erh
Yes
EN terminal
circuit error
The inverter detects an error on the EN terminal circuit, and stops itself.
Note that due to the internal circuit error, the reset feature of inverter itself cannot
clear the alarm
ecf
Yes
"—": Not applicable.
*1 When the inverter is equipped with the multi-function keypad, it displays the alarm letters on the LED indicator of the
keypad.
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