Diagnosing And Resetting Faults - YASKAWA U1000 Series Technical Manual

6.9 Diagnosing and Resetting Faults

6.9 Diagnosing and Resetting Faults
When a fault occurs and the drive stops, follow the instructions below to remove whatever conditions triggered the fault,
then restart the drive.
 Fault Occurs Simultaneously with Power Loss
WARNING! Electrical Shock Hazard. Ensure there are no short circuits between the main circuit terminals (R/L1, S/L2, and T/L3) or
between the ground and main circuit terminals before restarting the drive. Failure to comply may result in serious injury or death and
will cause damage to equipment.
1.
Turn on the drive input power.
2.
Use monitor parameters U2- to display data on the operating status of the drive just before the fault
occurred.
3.
Remove the cause of the fault and reset.
Note: 1. To find out what faults were triggered, check the fault history in U2-02. Information on drive status when the fault occurred such as
the frequency, current, and voltage can be found in U2-03 through U2-58.
page 340 for information on how to view fault data.
2. When the fault continues to be displayed after cycling power, remove the cause of the fault and reset.
 If the Drive Still has Power After a Fault Occurs
1.
Look at the digital operator for information on the fault that occurred.
2.
Refer to Fault Displays, Causes, and Possible Solutions on page 312
3.
Reset the fault.
 Viewing Fault Trace Data After Fault
1. Turn on the drive input power. The first screen displays.
2.
Press to display the monitor menu screen.
3.
Press to display the monitor mode screen.
Press and to scroll to monitor U2-02. The fault code
4.
shown in U2-02 is the fault that occurred most recently. In this example,
the most recent fault is "oC" (overcurrent).
Press to view drive status information when fault occurred.
5.
Parameter U2-58 helps determine the cause of a fault.
Parameters to be monitored differ depending on the control mode.
340
Refer to Fault Reset Methods on page
Step
Refer to Viewing Fault Trace Data After Fault on
341.
Display/Result
- MODE -
U1-01= 0.00Hz
U1-02= 0.00Hz
U1-03= 0.00A
JOG
- MODE -
Monitor Menu
U1-01= 0.00 Hz
U1-02= 0.00 Hz
U1-03= 0.00A
JOG
-MONITR-
U1 -01= 0.00 Hz
U1-02= 0.00 Hz
U1-03= 0.00A
JOG
- MONITR -
U2-02= oC
U2-03= 50.00Hz
U2-04= 50.00Hz
JOG
- MONITR -
Frequency Ref
U2-03= 50.00Hz
U2-04= 50.00Hz
U2-05= XX.XXA
JOG
- MONITR -
PowerSupply Freq
U2-58= 50.00Hz
U2-01= -----
U2-02= oC
JOG
YASKAWA ELECTRIC SIEP C710636 03A YASKAWA U1000 Technical Manual
DRV Rdy
FREF(AI)
RSEQ
RREF
FWD
DRV Rdy
RSEQ
RRFF
FWD
DRV Rdy
Monitor
RSEQ
RRFF
FWD
YEG
DRV Rdy
Last Fault
RSEQ
RRFF
FWD
YEG
DRV Rdy
RSEQ
RRFF
FWD
DRV Rdy
RSEQ
RRFF
FWD