Diagnosing And Resetting Faults; Diagnosing And Resetting Faults; Fault Occurs Simultaneously With Power Loss; If The Drive Still Has Power After A Fault Occurs - YASKAWA A1000 HHP Programming Manual

2.9 Diagnosing and Resetting Faults

2.9

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.
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. Do not immediately restart models 4A0930 and 4A1200 or operate
peripheral devices if a fuse is blown or a GFCI has tripped. 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 U2-20.
After Fault on page 224
2. 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 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
u

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 most recently.
Press to view drive status information when fault occurred.
5.
Parameters U2-03 through U2-20 help determine the cause of a fault.
Parameters to be monitored differ depending on the control mode.
224
for information on how to view fault data.
Step
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Refer to Viewing Fault Trace Data
184.
225.
Display/Result
- MODE - DRV Rdy
FREF (OPR)
U1-01= 0.00Hz
U1-02= 0.00Hz
LSEQ
U1-03= 0.00A LREF
JOG FWD FWD/REV
- MODE - DRV Rdy
Monitor Menu
U1-01= 0.00Hz
U1-02= 0.00Hz
LSEQ
U1-03= 0.00A LREF
JOG FWD FWD/REV
-MONITR- DRV Rdy
Monitor
U1 -01= 0.00Hz
U1-02= 0.00Hz LSEQ
U1-03= 0.00A LREF
JOG FWD FWD/REV
- MONITR - DRV Rdy
Last Fault
U2-02= oC
U2-03= 0.00Hz
LSEQ
U2-04= 0.00Hz LREF
JOG FWD FWD/REV
- MONITR - DRV Rdy
Frequency Ref
U2-03= 0.00Hz
U2-04= 0.00Hz LSEQ
U2-05= 0.00A LREF
JOG FWD FWD/REV
- MONITR - DRV Rdy
Heatsink Temp
U2-20= XX °C
U2-01= -----
LSEQ
U2-02= ----- LREF
JOG FWD FWD/REV