YASKAWA SGMJV User Manual page 312

Alarm Number:
Alarm Name
The inrush current limit resistor
A.740:
operation frequency at the main
Overload of Surge
circuit power supply ON/OFF
Current Limit Resistor
operation exceeds the allowable
(The main circuit power
range.
is turned ON/OFF too
frequently.)
A SERVOPACK fault occurred.
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 or operation
beyond the regenerative energy
(Detected when the heat
processing capacity.
sink temperature
exceeds 100°C.)
Incorrect SERVOPACK installa-
tion orientation or/and insuffi-
cient space around the
SERVOPACK.
A SERVOPACK fault occurred.
A.7Ab:
The fan inside the SERVOPACK
Built-in Fan in
stopped.
SERVOPACK
Stopped
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.
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, and the regenerative load
ratio (Un00A) to see the regenera-
tive energy processing capacity.
Check the SERVOPACK installa-
tion conditions.
−
Check for foreign matter or debris
inside the SERVOPACK.
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.
−
−
−
−
9.1 Alarm Displays
(cont'd)
Corrective Actions
Reduce the frequency of turning the
main circuit power supply ON/OFF.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Decrease the surrounding air tem-
perature by improving the SERVO-
PACK installation conditions.
Change the method for resetting the
alarm.
Reconsider the load and operating
conditions.
Install the SERVOPACK correctly
as specified.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Remove foreign matter or debris
from the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK 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.
• Single-turn absolute encoder or
incremental encoder
The servomotor may be faulty.
Replace the servomotor.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
9
9-13