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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.
u
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-
oo
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:
To find out what faults were triggered, check U2-02 (Fault History). Information on drive status when the fault occurred such
as the frequency, current and voltage, can be found in U2-03 through U2-17.
Refer to Viewing Fault Trace Data After
for information on how to view fault trace data.
Note:
When the fault continues to be displayed after cycling power, remove the cause of the fault and reset.
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If the Drive Still has Power After a Fault Occurs
1.
Look at the LED operator for information on the fault that occurred.
2.
Refer to Fault Displays, Causes, and Possible Solutions on page 267
3.
Reset the fault.
Refer to Fault Reset Methods on page 298
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Viewing Fault Trace Data After Fault
Step
Display/Result
1.
Turn on the drive input power. The first screen
displays.
STOP
2.
Press
until the monitor screen is displayed.
STOP
3.
Press
to display the parameter setting screen.
4.
Press
and > until U2-02 (Fault History) is
displayed.
5.
Press
to view most recent fault (here, EF3).
6.
Press
to view drive status information when
fault occurred.
7.
Parameters U2-03 through U2-17 help determine
cause of fault.
to
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Fault Reset Methods
After the Fault Occurs
Procedure
Fix the cause of the fault, restart the
drive, and reset the fault
Press
on the digital operator.
STOP
Fix the cause of the fault and reset via
Fault Reset Digital Input S4.
Close then open the fault signal digital input via
terminal S4. S4 is set fault reset as default (H1-04
= 12)
Fault Reset Switch
Drive
S4 Fault Reset Digital Input
SC Digital Input Common
6.8 Diagnosing and Resetting Faults
298
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual