150 YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions
5.10 Diagnosing and Resetting Faults
5.10 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! Sudden Movement Hazard. Ensure there are no short circuits between the main circuit terminals (U, V, W) 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 the control power on.
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.
4. Refer to Fault Displays, Causes, and Possible Solutions on page 118 for information on how to view fault
data.
Note: 1. To find out what faults were triggered, check the fault history in U2-02 (Previous Fault). Information on drive status when the fault
occurred such as the frequency, current, and voltage can be found in U2-03 through U2-31.
Refer to Viewing Fault Trace Data After Fault on page 150 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. Turn the main circuit power supply off.
2. Look at the digital operator for information on the fault that occurred.
3. Remove the cause of the fault and reset.
Refer to Fault Displays, Causes, and Possible Solutions on page 118.
4. Reset the fault.
Refer to Fault Reset Methods on page 151.
◆ Viewing Fault Trace Data After Fault
A checking method is shown here using an example in which the drive detects oL2 (Drive Overheat).
Step Display/Result
1 Turn on the drive input power. The first screen displays.
2
Press until the monitor screen is displayed.
3
Press to display the parameter setting screen.
4
Press and until U2-01 (Previous Fault) is displayed.
- MODE -
U1-01= 0.00Hz
U1-02= 0.00Hz
U1-03= 0.0A
DRV
FREF (OPR)
Rdy
JOG FWD FWD/REV
LSEQ
LREF
- MODE -
U1-01= 0.00Hz
U1-02= 0.00Hz
U1-03= 0.0A
DRV
Monitor Menu
Rdy
JOG FWD FWD/REV
LSEQ
LREF
-MONITR-
U1-02= 0.00Hz
U1-03= 0.0A
DRV
Monitor
JOG FWD FWD/REV
Rdy
LSEQ
LREF
U1 -01= 0.00Hz
-MONITR-
U2 -01= –
U2-02= oL2
U2-03= 0.00Hz
DRV
LSEQ
LREF
Current Fault
JOG FWD FWD/REV
Rdy
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