YASKAWA LA500, Technical Manual

Page: 179 / 376

T
roubleshooting
7
7.4 Fault
YASKAWA SIEPYEULA5001C LA500 Technical Manual 179
Code Name Causes Possible Solutions
L1-01 [Motor Overload (oL1) Protection] is set
incorrectly.
Set L1-01 in as specified by the motor qualities for a drive-
dedicated motor.
The V/f pattern does not fit the motor qualities.
•
Examine the ratios between the V/f pattern frequency and
voltage. Decrease the voltage if it is too high compared to the
frequency.
•
Adjust E1-04 to E1-10 [V/f Pattern Parameters] . For motor 2,
adjust E3-04 to E3-10 . Decrease the values set in E1-08 [Mid
Point A Voltage] and E1-10 [Minimum Output Voltage] .
Note:
If the values set in E1-08 and E1-10 are too low, the overload
tolerance will decrease at low speeds.
E1-06 [Base Frequency] is set incorrectly. Set E1-06 to the rated frequency shown on the motor nameplate.
One drive is operating more than one motor. Set L1-01 = 0 [Motor Overload (oL1) Protection = Disabled] ,
connect thermal overload relay to each motor to prevent damage
to the motor.
The electronic thermal protector qualities and the
motor overload properties do not match. • Examine the motor qualities and set L1-01 [Motor Overload
(oL1) Protection] correctly.
• Connect a thermal overload relay to the motor.
The electronic thermal protector is operating at an
incorrect level. Set E2-01 [Motor Rated Current (FLA)] correctly to the value
specified by the motor nameplate.
Phase loss in the input power supply is causing the
output current to change. Make sure that there is no phase loss, and repair problems.
The motor main circuit cable is too long.
•
Replace the drive with a larger capacity model.
•
Decrease C6-02 [Carrier Frequency] . Or set C6-02 = B .
Note:
• The drive detects this fault if the electronic thermal protector of the drive started the motor overload protection.
•
Do a Fault Reset to clear the fault.
• L5-07 [Fault Reset Enable Select Grp1] disables the Auto Restart function.
Code Name Causes Possible Solutions
oL2 Drive Overload
The load is too large. Decrease the load.
The acceleration/deceleration times or cycle times
are too short. • Examine the acceleration/deceleration times and the motor
start/stop frequencies (cycle times).
•
Increase the values set in C1-01 to C1-08 [Acceleration/
Deceleration Times] .
The V/f pattern does not fit the motor qualities.
•
Examine the ratios between the V/f pattern frequency and
voltage. Decrease the voltage if it is too high compared to the
frequency.
• Adjust E1-04 to E1-10 [V/f Pattern Parameters] . Decrease the
values set in E1-08 [Mid Point A Voltage] and E1-10
[Minimum Output Voltage] . For motor 2, adjust E3-04 to E3-
10 .
Note:
If the values set in E1-08 and E1-10 are too low, the overload
tolerance will decrease at low speeds.
The drive capacity is too small. Replace the drive with a larger capacity model.
Overload occurred while running at low speed.
•
Decrease the load when running at low speed.
• Replace the drive with a larger capacity model.
•
Decrease the value set in C6-02 [Carrier Frequency
Selection] .
The torque compensation gain is too large. Decrease the value set in C4-01 [Torque Compensation Gain] to
make sure that the motor does not stall.
Phase loss in the input power supply is causing the
output current to change. • Correct errors with the wiring for main circuit drive input
power.
•
Make sure that there is no phase loss, and repair problems.
Note:
• The drive detects this fault if the electronic thermal protector of the drive started the drive overload protection.
• Do a Fault Reset to clear the fault.
• L5-07 [Fault Reset Enable Select Grp1] disables the Auto Restart function.
Code Name Causes Possible Solutions
oL3 Overtorque Detection 1
A fault occurred on the machine.
Example: The machine is locked.
Examine the machine and remove the cause of the fault.
The parameters are incorrect for the load. Adjust L6-02 [Torque Detection Level 1] and L6-03 [Torque
Detection Time 1] settings.
Note:
•
The drive detects this fault if the drive output current is more than the level set in L6-02 for longer than L6-03 .
•
Do a Fault Reset to clear the fault.
•
If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L6-01 [Torque Detection Selection 1] .
•
L5-07 [Fault Reset Enable Select Grp1] disables the Auto Restart function.