YASKAWA CIPR-GA50UВ001AJ Series Installation & Primary Operation page 153

Code Name
IGBT Maintenance
TrPC
Time (90%)
Undertorque
UL3
Detection 1
Undertorque
UL4
Detection 2
Mechanical
UL5
Weakening Detection
2
Uv DC Bus Undervoltage
YASKAWA TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Causes
The IGBT is at 90% of its
expected performance life.
A fault occurred on the
machine.
Example: There is a broken
pulley belt.
The parameters are incorrect for
the load.
A fault occurred on the
machine.
Example: There is a broken
pulley belt.
The parameters are incorrect for
the load.
The drive detected undertorque
as specified by the conditions
for mechanical weakening
detection set in L6-08
[Mechanical Fatigue Detect
Select].
The drive input power voltage is
changing too much.
A phase loss occurred in the
drive input power.
There is loose wiring in the
drive input power terminals.
There was a loss of power.
The main circuit capacitors have
deteriorated.
15 Troubleshooting
Possible Solutions
Replace the IGBT or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest
sales representative.
Examine the machine and remove the
cause of the fault
Adjust L6-02 [Torque Detection Level 1]
and L6-03 [Torque Detection Time 1].
Examine the machine and remove the
cause of the fault
Adjust L6-05 [Torque Detection Level 2]
and L6-06 [Torque Detection Time 2].
Examine the machine for deterioration.
• Use a better power supply voltage to
align with the drive rated voltage.
• Make the drive input power stable.
• If there is not a fault with the input
power supply, examine the magnetic
contactor on the main circuit side for
faults.
Correct errors with the wiring for main
circuit drive input power.
Examine for loose screws and tighten
them as specified by the tightening
torque values in the manual.
Use a better power supply.
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.
153