Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 368)

10 Troubleshooting
10.1.2 Troubleshooting of Alarms
10-12
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 supply to the SERVO-
PACK and converter is incorrect. Check the timing of inputting the
control power supply to the SER-
VOPACK and converter. Input the control power supply
simultaneously to the SERVO-
PACK and converter.
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.
A.510:
Overspeed
(The servomotor speed
exceeds the maximum.)
The order of phases U, V, and W
in the servomotor wiring is incor-
rect. Check the motor wiring.
Confirm that the servomotor is cor-
rectly wired.
A reference value exceeding the
overspeed detection level was
input.
Check the input value.
Reduce the reference value or adjust
the gain.
The motor speed exceeded the
maximum.
Check the motor speed waveform.
Reduce the speed reference input
gain, adjust the servo gain, or recon-
sider the operating conditions.
A fault occurred in the SERVO-
PACK or converter.
−
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
A.511:
Overspeed of Encoder
Output Pulse Rate
The encoder output pulse fre-
quency exceeded the limit. Check the encoder output pulse set-
ting. Decrease the setting of the encoder
output pulse (Pn212).
The encoder output pulse output
frequency exceeded the limit
because the motor speed was too
high.
Check the encoder output pulse out-
put setting and motor speed.
Decrease the motor speed.
(cont’d)
Alarm Number:
Alarm Name
(Alarm Description)
Cause Investigative Actions Corrective Actions