YASKAWA SGDV User Manual page 268

Alarm Number:
Alarm Name
(Alarm Description)
The surrounding air temperature
is too high.
The overload alarm has been
reset by turning OFF the power
too many times.
A.7A0:
Heat Sink Overheated
Excessive load was applied dur-
(Detected when the heat
ing operation.
sink temperature
exceeds 90°C.)
Incorrect SERVOPACK installa-
tion orientation or/and insuffi-
cient space around the
SERVOPACK.
A SERVOPACK fault occurred.
Alarm occurred when the power
to the absolute encoder was ini-
tially turned ON.
The encoder cable disconnected,
and connected again.
A.810:
The power from both the control
Encoder Backup Error
power supply (+5 V) from the
(Only when an absolute
SERVOPACK and the battery
encoder is connected.)
power supply is not being sup-
(Detected on the encoder
plied.
side.)
An absolute encoder fault
occurred.
A SERVOPACK fault occurred.
A.820:
An encoder fault occurred.
Encoder Checksum
Error
(Detected on the encoder
side.)
A SERVOPACK fault occurred.
The battery connection is incor-
A.830:
rect.
Absolute Encoder
Battery Error The battery voltage is lower than
the specified value 2.7 V.
(The absolute encoder
battery voltage is lower
than the specified value.) A SERVOPACK fault occurred.
An encoder malfunctioned.
A.840:
Encoder Data Error
(Detected on the encoder
side.)
Malfunction of encoder because
of noise interference, etc.
Cause Investigative Actions
Check the surrounding air tempera-
ture using a thermostat.
Check the alarm history display
(Fn000) to see if the overload alarm
was reported.
Check the accumulated load ratio
(Un009) to see the load during oper-
ation.
Check the SERVOPACK installa-
tion conditions.
−
Check to see if the power was
turned ON initially.
Check to see if the power was
turned ON initially.
Check the encoder connector bat-
tery or the connector contact status.
−
−
−
−
Check the battery connection.
Measure the battery voltage.
−
−
−
9.1 Alarm Displays
(cont'd)
Corrective Actions
Decrease the surrounding air tem-
perature by improving the SERVO-
PACK installation conditions.
Change the method for resetting the
alarm.
Reconsider the load conditions and
operating conditions.
Install the SERVOPACK correctly
as specified.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Set up the encoder (Fn008).
Confirm the connection and set up
the encoder (Fn008).
Replace the battery or take similar
measures to supply power to the
encoder, and set up the encoder
(Fn008).
If the alarm cannot be reset by set-
ting up the encoder again, replace
the servomotor.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
• Absolute encoder
Set up the encoder again using
Fn008. If the alarm still occurs,
the servomotor may be faulty.
Replace the servomotor.
• One-turn absolute encoder or
incremental encoder
The servomotor may be faulty.
Replace the servomotor.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Reconnect the battery.
Replace the battery.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Correct the wiring around the
encoder by separating the encoder
cable from the servomotor main cir-
cuit cable or by checking the
grounding and other wiring.
9
9-9