Diagnosing And Resetting Faults - YASKAWA Z1000U Technical Manual

6.8 Diagnosing and Resetting Faults

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.
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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.
After Fault on page 234
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 HOA keypad 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
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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 U2-32 help determine the cause of a fault.
Parameters to be monitored differ depending on the control mode.
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Fault Reset Methods
When a fault occurs, the cause of the fault must be removed and the drive must be restarted. The table below lists the different
ways to restart the drive.
234
for information on how to view fault data.
Step
205.
234.
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Refer to Viewing Fault Trace Data
Display/Result
DRV-OFF
Freq Ref (AUTO)
U1-01= 0.00Hz
U1-02= 0.00Hz
LSEQ
U1-03= 0.00 A LREF
RLY DRV/BYP
DRV-OFF
Monitor Menu
U1-01= 60.00Hz
U1-02= 0.00Hz LSEQ
U1-03= 0.00 A LREF
RLY DRV/BYP
DRV-OFF
Monitor
U1-01= 60.00Hz
U1-02= 0.00Hz LSEQ
U1-03= 0.00 A
LREF
RLY
DRV/BYP
DRV-OFF
Last Fault
U2-02= oC
U2-03= 0.00Hz
LSEQ
U2-04= 0.00Hz LREF
RLY
DRV/BYP
DRV-OFF
Frequency Ref
U2-03= 0.00Hz
U2-04= 0.00Hz
LSEQ
U2-05= 0.00A LREF
RLY DRV/BYP
DRV-OFF
Heatsink Temp
U2-20= XX°C
U2-01=
LSEQ
U2-02= LREF
RLY DRV/BYP