Diagnosing And Resetting Faults - YASKAWA L1000A Technical Manual

6.8 Diagnosing and Resetting Faults

6.8 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 output speed, current, and voltage can be found in U2-03 through U2-20.
page 314 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
3.
Reset the fault. Refer to Fault Reset Methods on page
◆ Viewing Fault Trace Data After Fault
1. Turn on the drive input power. The first screen displays.
2.
Press or until the monitor screen is displayed.
3.
Press to display the parameter setting screen.
4.
Press and to scroll to monitor U2-02. The fault code shown in U2-02 is the fault that occurred last.
Press to view drive status information when fault occurred.
7.
Parameters U2-03 through U2-20 help determine the cause of a fault.
Parameters to be monitored differ depending on the control mode.
314
Step
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Refer to Viewing Fault Trace Data After Fault on
286.
315.
Display/Result
- MODE - DRV Rdy
Speed Ref (OPR)
U1-01= 0.00%
U1-02= 0.00%
RSEQ
U1-03= 0.00A LREF
FWD FWD/REV
- MODE - DRV Rdy
Monitor Menu
U1-01= 0.00%
U1-02= 0.00% RSEQ
U1-03= 0.00A LREF
FWD FWD/REV
-MONITR- DRV Rdy
Monitor
U1 -01= 0.00%
U1-02= 0.00% RSEQ
U1-03= 0.00A LREF
FWD FWD/REV
- MONITR - DRV Rdy
Last Fault
U2-02= oC
U2-03= 0.00%
RSEQ
U2-04= 0.00% LREF
FWD FWD/REV
- MONITR - DRV Rdy
Frequency Ref
U2-03= 0.00%
U2-04= 0.00%
RSEQ
U2-05= 0.00A LREF
FWD FWD/REV
- MONITR - DRV Rdy
Heatsink Temp
U2-20= XX °C
U2-01= ----- RSEQ
U2-02= ----- LREF
FWD FWD/REV