10.1 Alarm Displays
10-9
10
Trou
blesh
ooting
A.100:
Overcurrent or Heat
Sink Overheated
(An overcurrent flowed
through the IGBT or
heat sink of SERVO-
PACK overheated.)
Incorrect wiring or contact fault
of main circuit cables.
Check the wiring. Refer to
3.1
Main Circuit Wiring.
Correct the wiring.
Short-circuit or ground fault of
main circuit cables.
Check for short-circuits across the
servomotor terminal phases U, V,
and W, or between the grounding
and servomotor terminal phases U,
V, or W. Refer to
3.1 Main Circuit
Wiring
.
The cable may be short-circuited.
Replace the cable.
Short-circuit or ground fault
inside the servomotor.
Check for short-circuits across the
servomotor terminal phases U, V,
and W, or between the grounding
and servomotor terminal phases U,
V, or W. Refer to
3.1 Main Circuit
Wiring
.
The servomotor may be faulty.
Replace the servomotor.
Short-circuit or ground fault
inside the SERVOPACK.
Check for short-circuits across the
servomotor connection terminals U,
V, and W on the SERVOPACK, or
between the grounding and terminal
U, V, or W. Refer to
3.1 Main Cir-
cuit Wiring
.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The dynamic brake (DB: Emer-
gency stop executed from the
SERVOPACK) was frequently
activated, or the DB overload
alarm occurred.
Check the power consumed by DB
resistance (Un00B) to see how
many times the DB has been used.
Or, check the alarm history display
Fn000 to see if the DB overload
alarm A.730 or A.731 was reported.
Change the SERVOPACK model,
operating conditions, or the mecha-
nism so that the DB does not need
to be used so frequently.
A heavy load was applied while
the servomotor was stopped or
running at a low speed.
Check to see if the operating condi-
tions are outside servo drive specifi-
cations.
Reduce the load applied to the ser-
vomotor or increase the operating
speed.
Malfunction caused by noise
interference.
Improve the wiring or installation
environment, such as by reducing
noise, and check to see if the alarm
recurs.
Take countermeasures for noise,
such as correct wiring of the FG.
Use an FG wire size equivalent to
the main circuit wire size of the
SERVOPACK and converter.
The setting of Pn515.2 (Dynamic
Brake Answer Signal 1 (/
DBANS1) Input Signal Mapping)
does not agree with the contacts
of the dynamic brake contactor
that is connected.
Check the setting of Pn515.2 and
the contacts of the dynamic brake
contactor.
Set Pn515.2 to agree with the con-
tacts of the dynamic brake contac-
tor.
Current flowed to the dynamic
brake resistor when power to the
servomotor was ON due to weld-
ing or other failure of the
dynamic brake contacts.
Check the contactor to see if it is
welded.
The dynamic brake contactor may
have failed. Replace the dynamic
brake contactor.
A fault occurred in the SERVO-
PACK.
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK or con-
verter may be faulty. Replace the
SERVOPACK or converter.
(cont’d)
Alarm Number:
Alarm Name
(Alarm Description)
Cause
Investigative Actions
Corrective Actions
