10.1 Troubleshooting
10-7
10
Inspection, Maintenance, and
T
roubleshooting
10.1.5 Troubleshooting of Alarm and Warning
When an error occurs in servodrive, an alarm display such as A.
and CPF
or warning display such as
A.9
appears on the panel operator. However, the display “A.--” is not an alarm. Refer to the following sec-
tions to identify the cause of an alarm and the action to be taken.
Contact your Yaskawa representative if the problem cannot be solved by the described corrective action.
(1) Alarm Display and Troubleshooting
Table 10.5 Alarm Display and Troubleshooting
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause
Corrective Actions
A.02
Parameter
Breakdown
(The EEPROM
data storing the
parameter is
incorrect.)
Occurred when the
control power sup-
ply was turned ON.
The power supply was turned OFF while changing
the parameter setting.
The power supply was turned OFF while an alarm
was being written.
Set Fn005 to initialize the parameter and input the
parameter again.
The number of times that parameters were written
exceeded the limit. For example, the parameter was
changed every scan through the host controller.
Replace the SERVOPACK.
(Recheck the parameter writing method.)
The SERVOPACK EEPROM and the related circuit
are faulty.
Replace the SERVOPACK.
A.03
Main Circuit
Encoder Error
Occurred when the
control power sup-
ply was turned ON
or during operation
A SERVOPACK fault occurred.
Replace the SERVOPACK.
A.04
Parameter
Setting Error
(The parameter
setting was out
of the allowable
setting range.)
Occurred when the
control power sup-
ply was turned ON.
The incorrect parameter was being loaded. (The
incorrect value was rejected as an error at the digital
operator.)
Set Fn005 to initialize the parameter.
The SERVOPACK EEPROM and the related circuit
are faulty.
Replace the SERVOPACK.
A.05
Combination
Error
(The SERVO-
PACK and ser-
vomotor
capacities do not
correspond.)
Occurred when the
control power sup-
ply was turned ON.
The SERVOPACK and servomotor capacities do not
correspond to each other.
Servomotor capacity / SERVOPACK capacity
≤
1/4
or servomotor capacity / SERVOPACK capacity
≥
4
Select the proper combination of SERVOPACK
and servomotor capacities.
The parameter that is written in the encoder is incor-
rect.
Replace the servomotor.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
A.09
Dividing Ratio
Setting Error
Occurred when the
control power sup-
ply was turned ON.
At Pn207.2 = 1, the setting of dividing ratio (Pn212)
is not acceptable (out of fixed increments), or
exceeds the value for the connected encoder resolu-
tion.
Correct the setting of Pn212, and turn OFF the
control power and turn it ON again.
The SERVOPACK EEPROM and the related circuit
are faulty.
Replace the SERVOPACK.
A.0A
Encoder Model
Unmatched
Occurred when the
control power sup-
ply was turned ON.
The connected serial encoder is not supported by
Σ
-
II series servo drives.
Replace the servomotor with
Σ
-II series SERVO-
PACK supported model.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
A.10
Overcurrent
(An overcurrent
flowed through
the IGBT) or
Heat Sink
Overheated
Occurred when the
control power sup-
ply was turned ON.
The overload alarm has been reset by turning OFF
the power too many times.
Change the method to reset the alarm.
The connection is faulty between the SERVOPACK
board and the thermostat switch.
Replace the SERVOPACK.
The SERVOPACK fault occurred.
Occurred when the
main circuit power
supply was turned
ON or while the ser-
vomotor was run-
ning.
The connection between grounding and U, V, or W
is incorrect.
Check and then correct the wiring.
The grounding line has contact with other terminals.
A short circuit occurred between the grounding and
U, V, or W of the servomotor cable.
Repair or replace the servomotor main circuit
cable.
A short circuit occurred between phases U, V, and W
of the servomotor.
A short circuit occurred between the grounding and
U, V, or W of the SERVOPACK.
Replace the SERVOPACK.
A SERVOPACK fault occurred (current feedback
circuit, power transistor or board fault).
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