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E6580757
M-3
13
(Continued)
Error code
Communication
No.
Problem Possible causes Remedies
* 1D Small-current opera-
tion trip
• The output current falls to the low-current
detection level during operation.
• Enable (low-current detection pa-
rameter).
• Check whether the detection level is set
properly to the system.
( and )
• If no error is found in the setting, make a
service call.
22h Ground fault trip
• A ground fault occurs in the output cable
or the motor.
• Check the cable and the motor for ground
faults.
11h Emergency stop
• During automatic operation or remote op-
eration, a stop command is entered from
the operation panel or a remote input de-
vice.
• Reset the inverter.
15h
Main unit RAM fault
• The control RAM is defective. • Make a service call.
16h
Main unit ROM fault
• The control ROM is defective. • Make a service call.
17h
CPU fault trip
• The control CPU is defective. • Make a service call.
18h Remote control error
• An error arises during remote operation. • Check the remote control device, cables,
etc.
29h Inverter type error
• The control circuit board (main circuit
board or drive circuit board) is replaced.
• Make a service call.
12h EEPROM fault
• A data writing error occurs. • Turn off the inverter, then turn it on again.
If it does not recover from the error, make
a service call.
28h Auto-tuning error
• Check the settings of the motor parameters to .
• Check that the motor is not two or more sizes smaller in capacity than the inverter.
• Check that the inverter output cable is not too thin.
• Check that the motor is not running.
• Check that the motor is a three-phase inductive motor.
* With a parameter, you can choose between trip-on and -off.
[Alarm information] Each message in the table is displayed to give a warning but does not cause the inverter to
trip.
Error code Problem Possible causes Remedies
(Note 1)
ST terminal OFF
• The ST-CC circuit is opened. • Close the ST-CC circuit.
Undervoltage in main
circuit
• The supply voltage between R, S and T is
under voltage.
• Measure the main circuit supply voltage.
If the voltage is at a normal level, the
inverter requires repairing.
Retry in process
• The inverter is in the process of retry.
• A momentary stop occurred.
• The inverter is normal if it restarts after
several tens of seconds.
The inverter restarts automatically. Be
careful of the machine because it may
suddenly restart.
Frequency point set-
ting error
• The frequency setting signals at points 1
and 2 are set too close to each other.
• Set the frequency setting signals at points
1 and 2 apart from each other.
Clear command ac-
ceptable
• This message is displayed when pressing
the STOP key while an error code is dis-
played.
• Press the STOP key again to clear the
trip.
Emergency stop
command accept-
able
• The operation panel is used to stop the
operation in automatic control or remote
control mode.
• Press the STOP key for an emergency
stop.
To cancel the emergency stop, press any
other key.
Setting error alarm /
An error code and
data are displayed
alternately twice
each.
• An error is found in a setting when data is
reading or writing.
• Check whether the setting is made cor-
rectly.
(Continued overleaf)