Yaskawa VS-616G5 Modbus Plus Communication Card - Manual (Page 44)

8-4 Diagnostics and Troubleshooting
VS-616G5 Failure Codes
The VS-616G5 drive can have a drive failure, such as undervoltage, overload, external fault, etc.
When a drive failure occurs, it can be classified as an alarm, a minor fault, or a major fault. The
drive reacts differently with each type of failure. An alarm displays a warning indication, however
operation continues. Minor faults allow continued operation, and a contact will close only if one of
the multi-function outputs is set up as a minor fault contact. The major faults cause the motor to
coast to stop, and the fault signal output is present at terminals 18 - 20.
The VS-616G5’s parameters U2-01 (current fault), U2-02 (last fault), and U3-01 (most recent)
display a fault code representing the drive failure. Using the U2-xx and U3-xx registers can aid
greatly in troubleshooting the VS-616G5.
The following table indicates the abbreviation displayed on the Digital Operator and the
hexadecimal code viewed in drive parameters: U2-01, U2-02, and U3-01 when a specific drive
failure occurs. The table also indicates whether the drive failure is an A-alarm, m-minor fault, or
M-major fault.
Drive Failure Digital Operator
Display
Hexadecimal
Code
Alarm, minor fault, or
Major Fault
DC Bus Fuse Open PUF 1 M
DC Bus Undervoltage UV1 2 A
CTL PS Undervoltage UV2 3 A
MC Answerback UV3 4 A
Short Circuit SC 5 M
Ground Fault GF 6 M
Overcurrent oC 7 M
Overvoltage oV 8 M
Heatsink Overtemperature oH 9 M
Drive Overheat oH1 A M
Motor Overload oL1 B M
Drive Overload oL2 C M
Overtorque 1 oL3 D M
Overtorque 2 oL4 E M
Dynamic Braking Transistor RR F M
Dynamic Braking Resistor RH 10 M
External Fault 3 EF3 11 M
External Fault 4 EF4 12 m
External Fault 5 EF5 13 m
External Fault 6 EF6 14 m
External Fault 7 EF7 15 m
External Fault 8 EF8 16 m
reserved 17 -
Overspeed oS 18 M
Speed Deviation DEV 19 m
PG Open PGo 1A M
Input Phase Loss PF 1B M
Output Phase Loss LF 1C M
DCCT Fault CF 1D M
Operator Disconnected - 1E m
EEPROM R/W Error ERR 1F m
reserved 20 -
Modbus Com Error CE 21 M
reserved 22 - 24 -
Control Fault CPFxx 25 M
Zero Servo Fault SVE 26 -
DDS External Fault EF0 27 -
Note: Further detail on drive failures and troubleshooting can be found in Chapter 4 of the VS-616G5
Installation & Quick-Start Manual, YEA-TOA-S616-10.12.