YASKAWA
SIEPC71061753A GA500 Technical Manual
259
Code
Name
Causes
Possible Solutions
UL4
Undertorque Detection 2
A fault occurred on the machine.
Example: There is a broken pulley belt.
Examine the machine and remove the cause of the fault.
The parameters are incorrect for the load.
Adjust
L6-05 [Torque Detection Level 2]
and
L6-06 [Torque
Detection Time 2]
settings.
Note:
•
The drive detects this error if the drive output current is less than the level set in
L6-05
for longer than
L6-06
.
•
Do a Fault Reset to clear the fault.
•
If the drive detects this error, it will operate the motor as specified by the Stopping Method set in
L6-04 [Torque Detection Selection 2]
.
Code
Name
Causes
Possible Solutions
UL5
Mechanical Weakening Detection 2
The drive detected undertorque as specified by the
conditions for mechanical weakening detection set
in
L6-08 [Mechanical Fatigue Detect Select]
.
Examine the machine for deterioration.
Note:
•
Do a Fault Reset to clear the fault.
•
If the drive detects this error, it will operate the motor as specified by the Stopping Method set in
L6-08
.
Code
Name
Causes
Possible Solutions
Uv1
DC Bus Undervoltage
There is a phase loss in the drive input power.
Correct errors with the wiring for main circuit drive input power.
There is loose wiring in the drive input power
terminals.
Tighten the terminal screws to the correct tightening torque.
The drive input power voltage is changing too
much.
•
Examine the input power for problems.
•
Make the drive input power stable.
•
If the input power supply is good, examine the magnetic
contactor on the main circuit side for problems.
There was a loss of power.
Use a better power supply.
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.
The relay or contactor on the soft-charge bypass
relay is damaged.
U4-06 [PreChargeRelayMainte]
shows the performance life of
the soft-charge bypass relay. If
U4-06
is more than 90%, replace
the board or the drive. For information about replacing the board,
contact Yaskawa or your nearest sales representative.
Note:
•
The drive detects this error if the DC bus voltage decreases below the level set in
L2-05 [Undervoltage Detection Lvl (Uv1)]
while the drive is running.
•
The
Uv1
detection level is approximately 190 V for a 200 V class drives. The detection level is approximately 380 V for 400 V class drives. The detection level is
approximately 350 V when
E1-01 [Input AC Supply Voltage]
< 400.
•
Do a Fault Reset to clear the fault.
•
Fault trace is not available for this fault.
•
L5-08 [Fault Reset Enable Select Grp2]
disables the Auto Restart function.
Code
Name
Causes
Possible Solutions
Uv2
Control Power Undervoltage
The value set in
L2-02 [Power Loss Ride Through
Time]
increased and the momentary power loss
recovery unit is not connected to the drive.
Connect the momentary power loss recovery unit to the drive.
There was a problem with the drive hardware.
•
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:
•
The drive detects this error if the control power supply voltage decreases.
•
Do a Fault Reset to clear the fault.
•
Fault trace is not available for this fault.
Code
Name
Causes
Possible Solutions
Uv3
Soft Charge Answerback Fault
The relay or contactor on the soft-charge bypass
relay is damaged.
•
Re-energize the drive.
•
If the fault stays, replace the control board or the drive.
•
Check monitor
U4-06 [PreChargeRelayMainte]
shows the
performance life of the soft-charge bypass relay. If
U4-06
is
more than 90%, replace the 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.
•
Fault trace is not available for these faults.
Summary of Contents for CIPR-GA50C series
Page 2: ...This Page Intentionally Blank 2 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 12: ...12 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 44: ...2 9 Installation Methods 44 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 110: ...3 17 Motor Application Precautions 110 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 150: ...4 12 Test Run Checklist 150 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 156: ...5 2 European Standards 156 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 158: ...5 2 European Standards 158 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 288: ...7 10 Troubleshooting Without Fault Display 288 YASKAWA SIEPC71061753A GA500 Technical Manual...
Page 306: ...8 6 Storage Guidelines 306 YASKAWA SIEPC71061753A GA500 Technical Manual...
