YASKAWA SGM Series User Manual page 268

Maintenance and Inspection
12.2.2 SERVOPACKS
12.2.2 SERVOPACKS
Alarm Code
(Alarm/warning History)
"10"
Overcurrent
12
"11"
Ground Ground
"40"
Overvoltage
"41"
Insufficient Voltage Insufficient Voltage
"51"
Overspeed
J Troubleshooting Using MECHATROLINK Communication Data
Table 12.6 shows examples of troubleshooting problems with MECHATROLINK commu-
nication data (alarm code).
Table 12.6 Troubleshooting with MECHATROLINK Communication Data
Status When Lit
Lit at power ON
Lit at power ON and servo ON Current feedback circuit or power
At main circuit power supply
ON
Lit with normal running or de-
celeration
During Servomotor driving
Lit with high-speed Servomo-
tor rotation after reference
input
Cause
Circuit board (1PWB) defective
transistor defective.
Dynamic brake circuit defective.
Servomotor or wiring grounded.
Main circuit grounded.
2
GD load too large.
Circuit board (1PWB) defective.
Power supply voltage not within
specifications.
Rectifier diode malfunctioned.
Fuse blown.
Rush current limit resistor blown.
Circuit board (1PWB) defective.
Servomotor wiring incorrect.
Encoder wiring incorrect.
12 -6
Remedy
Replace SERVOPACK.
Replace SERVOPACK.
Replace the Servomotor and
correct Servomotor wiring.
Replace SERVOPACK.
Check the load inertia for the
moment of inertia on the motor
shaft.
Replace SERVOPACK.
Check the power supply.
Replace SERVOPACK.
S Check and correct wiring.
S Check to see if the Phase-A,
-B and -C pulses are correct
at 2CN, and repair (discon-
nection, short, no power
supply, detective circuit
board) if necessary.