YASKAWA
SIEPYEULA5001C LA500 Technical Manual
181
Code
Name
Causes
Possible Solutions
There is unsatisfactory balance between voltage
phases.
•
Examine the input power for problems.
•
Make the drive input power stable.
•
Set
L8-05 = 0 [Input Phase Loss Protection Sel = Disabled]
.
The main circuit capacitors have become
unserviceable.
•
Examine the capacitor maintenance time in monitor
U4-05
[CapacitorMaintenance]
. If
U4-05
is more than 90%, replace
the control board or the drive. For information about replacing
the control board, contact Yaskawa or your nearest sales
representative.
•
If drive input power is correct and the fault stays, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales
representative.
Note:
•
The drive detects this error if the DC bus voltage changes irregularly without regeneration.
•
Do a Fault Reset to clear the fault.
•
Use
L8-05
to enable and disable
PF
detection.
Code
Name
Causes
Possible Solutions
rF
Braking Resistor Fault
The resistance of the dynamic braking option
connected to the drive is too low.
Use a dynamic braking option that fits the model and duty rating
of the drive.
A regenerative converter or regenerative unit is
connected to the drive.
Set
L8-55 = 0 [Internal DB TransistorProtection = Disable]
.
Note:
Do a Fault Reset to clear the fault.
Code
Name
Causes
Possible Solutions
rH
Braking Resistor Overheat
The deceleration time is too short and excessive
regenerative energy is flowing back into the drive.
•
Check the load level, deceleration time, and speed.
•
Decrease the load.
•
Increase the values set in
C1-02, C1-04, C1-06, or C1-08
[Deceleration Times]
.
•
Use a dynamic braking option that lets you use more power.
The duty cycle is too high.
Examine the duty cycle.
The braking load is too heavy.
•
Calculate the braking load and braking power again, and
decrease the braking load.
•
Use a braking resistor that improves braking power.
The braking resistor is not sufficient.
Use the braking resistor specifications to select a sufficient
braking resistor.
Note:
•
The drive detects this error if the braking resistor overheat protective function is active.
•
The magnitude of the braking load causes the braking resistor overheat alarm, NOT the surface temperature. If the duty cycle is higher than the braking resistor rating, the
drive will show the alarm.
•
Do a Fault Reset to clear the fault.
•
Parameter
L8-01
enables and disables
rH
detection.
Code
Name
Causes
Possible Solutions
rr
Dynamic Braking Transistor Fault
The drive control circuit is damaged.
There is a malfunction in the internal braking
transistor of the drive.
•
Re-energize the drive.
•
If the fault stays, replace the control board or the drive. For
information about replacing the control board, contact
Yaskawa or your nearest sales representative.
Note:
Do a Fault Reset to clear the fault.
Code
Name
Causes
Possible Solutions
SC
Short Circuit/IGBT Failure
Overheating caused damage to the motor or the
motor insulation is not satisfactory.
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
The motor main circuit cable is contacting ground
to make a short circuit.
•
Examine the motor main circuit cable for damage, and repair
short circuits.
•
Measure the resistance between the motor main circuit cable
and the ground terminal. If there is electrical conduction,
replace the cable.
A short circuit or ground fault on the drive output
side caused damage to the output transistor of the
drive.
•
Make sure that there is not a short circuit in terminal B1 and
terminals U/T1, V/T2, and W/T3. Make sure that there is not a
short circuit in terminals - and terminals U/T1, V/T2, and W/
T3.
•
If there is a short circuit, contact Yaskawa or your nearest sales
representative.
Note:
•
The drive detects this error if there is a short circuit or ground fault on the drive output side, or an IGBT failure.
•
Do a Fault Reset to clear the fault.
Code
Name
Causes
Possible Solutions
SCF
Safety Circuit Fault
The safety circuit is broken.
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
Note:
Do a Fault Reset to clear the fault.
Summary of Contents for LA500
Page 2: ...This Page Intentionally Blank 2 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 10: ...10 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 18: ...i 3 Glossary 18 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 74: ...3 14 Wiring Checklist 74 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 164: ...6 1 MEMOBUS Modbus Communications 164 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 202: ...7 10 Troubleshooting Without Fault Display 202 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 218: ...8 6 Storage Guidelines 218 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 234: ...10 6 Peripheral Devices and Options 234 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 375: ...YASKAWA SIEPYEULA5001C LA500 Technical Manual 375...
