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.
Note:
An oC/SC fault will be displayed in the event of an IGBT failure. It may not be possible to reset this fault until the IGBT problem is corrected.
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:
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 U2-32.
Refer to Viewing Fault Trace Data
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.
u
If the Drive Still has Power After a Fault Occurs
1.
Look at the HOA keypad for information on the fault that occurred.
2.
Refer to Fault Displays, Causes, and Possible Solutions on page 228
3.
Reset the fault.
Refer to Fault Reset Methods on page 257
u
Viewing Fault Trace Data After Fault
Step
Display/Result
1.
Turn on the drive input power. The first screen displays.
DRV-OFF
U1-01= 0.00Hz
U1-02= 0.00Hz
U1-03= 0.00 A
Freq Ref (AUTO)
LSEQ
LREF
RLY
DRV/BYP
2.
Press
or
until the monitor screen is displayed.
DRV-OFF
U1-01= 60.00Hz
U1-02= 0.00Hz
U1-03= 0.00 A
Monitor Menu
LSEQ
LREF
RLY
DRV/BYP
3.
Press
to display the parameter setting screen.
DRV-OFF
U1-0
1
= 60.00Hz
U1-02= 0.00Hz
U1-03= 0.00 A
Monitor
LSEQ
LREF
RLY
DRV/BYP
4.
Press
and
to scroll to monitor U2-02. The fault code shown in U2-02
is the fault that occurred most recently.
DRV-OFF
U2-
02
= oC
U2-03= 0.00Hz
U2-04= 0.00Hz
Last Fault
LSEQ
LREF
RLY
DRV/BYP
5.
Press
to view drive status information when fault occurred.
Parameters U2-03 through U2-32 help determine the cause of a fault.
Parameters to be monitored differ depending on the control mode.
DRV-OFF
U2-
03
= 0.00Hz
U2-04= 0.00Hz
U2-05= 0.00A
Frequency Ref
LSEQ
LREF
DRV-OFF
U2-
20
= XX°C
U2-01=
U2-02=
Heatsink Temp
LSEQ
LREF
RLY
DRV/BYP
RLY
DRV/BYP
6.8 Diagnosing and Resetting Faults
256
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
