Yaskawa DeviceNet Option Card CM05x - Manual (Page 64)

Diagnostics and Troubleshooting 9-5
Drive Fault Codes
The Drive can have a drive failure, such as undervoltage, overload, external fault, etc. When a Drive fault
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 activate the fault contact output at terminals MA, MB, MC.
The Drive monitors U2-01 (current fault), U2-02 (last fault), and U3-01 through U3-04 (four most recent faults)
display a fault code representing the drive failure. 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
Code
(in hex)
Alarm, minor
fault, or Major
DC Bus Fuse Open FU 1 M
DC Bus Undervoltage UV1 2 A
Control Power Supply 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 (F7 and G7 only) PGo 1A M
Input Phase Loss PF 1B M
Output Phase Loss LF 1C M
DCCT Fault CF 1D M
Operator Disconnected OPR 1E m
EEPROM R/W Error ERR 1F m
Reserved - 20 -
Modbus Com Error CE 21 M
Option Com Error BUS 22 m
Control Fault CF 25 M
Zero Servo Fault (F7 and G7 only) SVE 26 M
Option External Fault EF0 27 M
Reserved - 28 - 82 -
Baseblock Circuit Fault CPF02 83 M
EEPROM Fault CPF03 84 M
Internal A/D Fault CPF04 85 M
External A/D Fault CPF05 86 M
Option Error CPF06 87 M
Reserved - 88 - 90 -