8.1 Alarm Displays
8-11
8
Trou
blesh
ooting
A.410:
Undervoltage
(Detected in the SER-
VOPACK main circuit
power supply section.)
The converter’s main circuit
power supply was 240 V or
lower.
Measure the power supply voltage. Set the power supply voltage within
the specified range.
The power supply voltage
dropped during operation.
Measure the power supply voltage.
Increase the power supply capacity.
Occurrence of instantaneous
power interruption.
Measure the power supply voltage.
When the instantaneous power cut
hold time (Pn509) is set, decrease
the setting.
The converter fuse is blown out.
−
Replace the converter, connect a
reactor, and run the SERVOPACK
and converter.
The 1 and 2 terminals of the
converter are open.
Check the 1 and 2 terminals on
the converter.
Correctly connect the 1 and 2
terminals on the converter.
A fault occurred in the SERVO-
PACK or converter.
−
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
A.42A:
Converter error
The Converter fan stopped (The
FAN STOP indicator on the con-
verter is lit.).
Check for foreign matter or debris
inside the converter.
Remove foreign matter or debris
from the converter. If the alarm still
occurs, the SERVOPACK or con-
verter may be faulty. Replace the
SERVOPACK or converter.
An error was detected in the mag-
netic contactor inside the con-
verter. (The CHRG-ERR
indicator on the converter lights
when the power supply is turned
ON.)
Check to see if you can hear the
magnetic contactor operate when
the power supply is turned ON.
If the power supply voltage is cor-
rect but no sound is heard when the
power supply is turned ON, the con-
verter may be faulty. Replace the
converter.
Overheating was detected in the
heat sink in the converter (The
OVERHEAT indicator on the
converter is lit.).
Check the ambient temperature,
check for an overload, and check
the installation method.
Review the ambient temperature,
load conditions, and installation
conditions.
The DC output voltage from the
converter is not correct. (The
CHRG-ERR indicator on the con-
verter is lit.)
Measure the power supply voltage
and the output voltage.
If the output voltage is not consis-
tent with the power supply voltage,
the converter may be faulty.
Replace the converter.
Measure the power supply voltage
waveform when the power supply is
turned ON and OFF.
If the voltage waveform is not sta-
ble, take suitable measures to make
it stable.
The timing of inputting the con-
trol power supplies is incorrect.
Check the timing of inputting the
control power supplies.
Input the control power supplies
simultaneously.
The wiring between the SERVO-
PACK and converter is incorrect
or the connection is faulty.
Check the wiring.
Correctly connect the SERVO-
PACK and converter to each other.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
Check the connection of CN901.
Correctly connect CN901.
A fault occurred in the converter.
−
Replace the converter.
A.450:
Main-Circuit
Capacitor Overvoltage
The fuse in the SERVOPACK is
blown out.
Check to see if this alarm occurs
when the main circuit power supply
is turned ON.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A fault occurred in the SERVO-
PACK or converter.
−
Replace the SERVOPACK or con-
verter.
(cont’d)
Alarm Number:
Alarm Name
(Alarm Description)
Cause
Investigative Actions
Corrective Actions