YASKAWA HV600 Series Installation & Primary Operation page 105

Code Name
ov2 DC Bus Overvoltage 2
PE1, PE2 PLC Faults
PF Input Phase Loss
SC Short Circuit/IGBT Failure
SCF Safety Circuit Fault
SEr Speed Search Retries Exceeded
STPo Motor Step-Out Detected
TiM Keypad Time Not Set
UL3 Undertorque Detection 1
UL4 Undertorque Detection 2
UL6 Underload or Belt Break Detected
Uv1 DC Bus Undervoltage
YASKAWA TOEPC71061732E HV600 Drive Installation & Primary Operation
Causes
There is motor hunting.
Speed search does not complete at start when you use
an induction motor in EZOLV control.
The wiring is too long and DC bus voltage is too
large.
The communication option detected a fault.
There is a phase loss in the drive input power.
There is loose wiring in the drive input power
terminals.
The drive input power voltage is changing too much.
There is unsatisfactory balance between voltage
phases.
The main circuit capacitors have become
unserviceable.
Overheating caused damage to the motor or the motor
insulation is not satisfactory.
The safety circuit is broken.
The speed search-related parameters are set
incorrectly.
The motor code is set incorrectly for PM Control
Methods.
There is a battery in the keypad, but the date and time
are not set.
A fault occurred on the machine.
Example: There is a broken pulley belt.
A fault occurred on the machine.
Example: There is a broken pulley belt.
The output current decreased less than the motor
underload curve set in L6-14 [Motor Underload Level
@ Min Freq] for longer than the time set in L6-03
[Torque Detection Time 1].
There is a phase loss in the drive input power.
There is loose wiring in the drive input power
terminals.
The drive input power voltage is changing too much.
There was a loss of power.
The main circuit capacitors have become
unserviceable.
19 Troubleshooting
Possible Solutions
• Adjust n1-02 [Hunting Prevention Gain Setting] settings.
• Adjust n8-45 [Speed Feedback Detection Gain] and n8-47 [Pull-
in Current Comp Filter Time] settings.
When E9-01 = 0 [Motor Type Selection = Induction (IM)], set b3-
24 = 2 [Speed Search Method Selection = Current Detection 2].
• Shorten the shielded motor cable.
• Decrease the carrier frequency.
• If the power supply has a neutral ground, switch on the internal
EMC filter.
Refer to the manual for the communication option card.
Correct errors with the wiring for main circuit drive input power.
Tighten the terminal screws to the correct tightening torque.
• 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.
• Examine the input power for problems.
• Make the drive input power stable.
• Set L8-05 = 0 [Input Phase Loss Protection Sel = Disabled].
• 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.
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
• Decrease b3-10 [Speed Estimation Detection Gain].
• Increase b3-17 [Speed Est Retry Current Level].
• Increase b3-18 [Speed Est Retry Detection Time].
• Do Auto-Tuning again.
• Set E5-01 [PM Motor Code Selection] correctly as specified by
the motor.
• For specialized motors, refer to the motor test report and set E5-
xx correctly.
Use the keypad to set the date and time.
Examine the machine and remove the cause of the fault.
Examine the machine and remove the cause of the fault.
Adjust the L6-14 setting to set the output current to stay the level
more than the motor underload curve during usual operations.
Correct errors with the wiring for main circuit drive input power.
Tighten the terminal screws to the correct tightening torque.
• 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.
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.
105