Yaskawa Z1000U - Manual (Page 218)

5.9 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 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 U2-58. Refer to Viewing Fault Trace Data
After Fault on page 218 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 193 .
3.
Reset the fault. Refer to Fault Reset Methods on page 219 .
u Viewing Fault Trace Data After Fault
Step Display/Result
1. Turn on the drive input power. The first screen displays.
- MODE -
U1-01= 0.00Hz
U1-02= 0.00Hz
U1-03= 0.00A
DRV
FREF(AI)
Rdy
RSEQ
RREF
FWD JOG
2. Press
to display the monitor menu screen.
- MODE -
U1-01= 0.00Hz
U1-02= 0.00Hz
U1-03= 0.00A
DRV
Monitor Menu
Rdy
RSEQ
RREF
FWD JOG
3. Press
to display the monitor mode screen.
- MODE -
U1-01= 0.00Hz
U1-02= 0.00Hz
U1-03= 0.00A
DRV
Monitor
Rdy
RSEQ
RREF
FWD JOG
1
4.
Press and to scroll to monitor U2-02. The fault code shown in U2-02
is the fault that occurred most recently. In this example, the most recent fault is
“oC” (overcurrent).
- MONITR -
U2- 02 = oC
U2-03= 60.00Hz
U2-04= 60.00Hz
DRV
Last Fault
Rdy
RSEQ
RREF
FWD JOG
5.9 Diagnosing and Resetting Faults
218 YASKAWA ELECTRIC TOEP C710636 10B Z1000U HVAC MATRIX Drive User Manual