YASKAWA SIGMA-7 Series User Manual

6.1 Alarm Displays
6.1.2 Troubleshooting Alarms
6-18
A.7A2:
Internal Tempera-
ture Error 2
(Power Board
Temperature
Error)
The surrounding air
temperature is too
high.
Check the surrounding
air temperature using a
thermometer. Or, check
the operating status
with the SERVOPACK
installation environment
monitor.
Decrease the surround-
ing temperature by
improving the SERVO-
PACK installation condi-
tions.
*1
An overload alarm
was reset by turning
OFF the power sup-
ply too many times.
Check the alarm display
to see if there is an
overload alarm.
Change the method for
resetting the alarm.
–
There was an exces-
sive load or operation
was performed that
exceeded the regen-
erative processing
capacity.
Use the accumulated
load ratio to check the
load during operation,
and use the regenera-
tive load ratio to check
the regenerative pro-
cessing capacity.
Reconsider the load and
operating conditions.
–
The SERVOPACK
installation orientation
is not correct or there
is insufficient space
around the SERVO-
PACK.
Check the SERVOPACK
installation conditions.
Install the SERVOPACK
according to specifica-
tions.
*1
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the
SERVOPACK.
–
A.7A3:
Internal Tempera-
ture Sensor Error
(An error
occurred in the
temperature sen-
sor circuit.)
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the
SERVOPACK.
–
A.7Ab:
SERVOPACK
Built-in Fan
Stopped
The fan inside the
SERVOPACK
stopped.
Check for foreign matter
inside the SERVOPACK.
Remove foreign matter
from the SERVOPACK. If
the alarm still occurs, the
SERVOPACK may be
faulty. Replace the
SERVOPACK.
–
A.810:
Encoder Backup
Alarm
(Detected at the
encoder, but only
when an abso-
lute encoder is
used.)
The power to the
absolute encoder was
turned ON for the first
time.
Check to see if the
power supply was
turned ON for the first
time.
Set up the encoder.
*1
The Encoder Cable
was disconnected
and then connected
again.
Check to see if the
power supply was
turned ON for the first
time.
Check the encoder con-
nection and set up the
encoder.
Power is not being
supplied both from
the control power
supply (+5 V) from the
SERVOPACK and
from the battery
power supply.
Check the encoder
connector battery and
the connector status.
Replace the battery or
implement similar mea-
sures to supply power to
the encoder, and set up
the encoder.
A failure occurred in
the absolute encoder.
–
If the alarm still occurs
after setting up the
encoder again, replace
the Servomotor.
–
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the
SERVOPACK.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference

YASKAWA SIGMA-7 Series Specifications

General

Encoder Resolution	24-bit absolute encoder
Pollution Degree	2
Cooling Method	Natural cooling or forced air cooling
Control Method	Vector control
Communication Protocols	EtherCAT, MECHATROLINK-III
Input Voltage	AC 200 V, AC 400 V
Rated Output	Varies by model
Safety Function	STO (Safe Torque Off), SS1 (Safe Stop 1), SS2 (Safe Stop 2), SLS (Safely Limited Speed), SBC (Safe Brake Control)
Power Supply Voltage	AC 200 V, AC 400 V
Rated Output Current	Varies by model
Protection Functions	Overload, overvoltage, undervoltage, overheat, short circuit
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C to 65°C
Vibration Resistance	5.9 m/s² at 10 Hz to 55 Hz
Ambient Humidity	5% to 95% RH (non-condensing)
Altitude	Up to 1000 m
Installation	Panel mounted