Drive fault codes – Yaskawa DeviceNet Option Card CM05x User 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
-