Yaskawa MP940 - Manual (Page 400)

10.2 Troubleshooting
10-33
10
10.2.3 Alarm Display Table
A summary of alarm displays and alarm code outputs is given in the following table.
Table 10.5 Alarm Display Table
Alarm
Display
Alarm Code Outputs ALM
Output
Alarm Name Meaning
ALO1 ALO2 ALO3
A.02 OFF OFF OFF OFF Parameter Breakdown *2 EEPROM data of SERVOPACK is
abnormal.
A.03 Main Circuit Encoder
Error Detection data for power circuit is
abnormal.
A.04
Parameter Setting Error *2 The parameter setting is outside
the allowable setting range.
A.05 Combination Error SERVOPACK and servomotor
capacities do no match each other.
A.10 ON OFF OFF OFF Overcurrent or Heat Sink
Overheated
*2
An overcurrent flowed through the
IGBT.
Heat sink of SERVOPACK was
overheated.
A.30 ON ON OFF OFF Regeneration Error
Detected • Regenerative circuit is faulty
• Regenerative resistor is faulty.
A.32 Regenerative Overload Regenerative energy exceeds
regenerative resistor capacity.
A.40 OFF OFF ON OFF Overvoltage Main circuit DC voltage is exces-
sively high
A.41 Undervoltage Main circuit DC voltage is exces-
sively low.
A.51 ON OFF ON OFF Overspeed Motor speed is abnormally high.
A.71 ON ON ON OFF Overload: High Load The motor was operating for sev-
eral seconds to several tens of sec-
onds under a torque largely
exceeding ratings.
A.72 Overload: Low Load The motor was operating continu-
ously under a torque largely
exceeding ratings.
A.73 Dynamic Brake Overload When the dynamic brake was
applied, rotational energy
exceeded the capacity of dynamic
brake resistor.
A.74 Overload of Surge Current
Limit Resistor The main circuit power was fre-
quently turned ON and OFF.
A.7A
Heat Sink Overheated *1 The heat sink of SERVOPACK
overheated.