YASKAWA L1000V Technical Manual page 179

Internal cooling fan has stopped.
Airflow around the drive is restricted.
Digital Operator Display
oL3
Cause
Inappropriate parameter settings.
There is a fault on the machine side (e.g., the
machine is locked up).
Digital Operator Display
oL4
Cause
Parameter settings are not appropriate.
There is a fault on the machine side (e.g., the
machine is locked up).
Digital Operator Display
Cause
Inappropriate parameter settings.
YASKAWA EUROPE SIEP
• Replace the cooling fan.
• After replacing the drive, reset the cooling fan maintenance parameter to (o4-03 = "0").
• Provide proper installation space around the drive as indicated in the manual.
page 31.
• Allow for the specified space and ensure that there is sufficient circulation around the control panel.
• Check for dust or foreign materials clogging cooling fan.
• Clear debris caught in the fan that restricts air circulation.
Overtorque Detection 1
Drive output current (or torque in OLV) was greater than L6-02 for longer than the time set in L6-03.
Check parameters L6-02 and L6-03.
• Check the status of the machine.
• Remove the cause of the fault.
Overtorque Detection 2
Drive output current (or torque in OLV) was greater than L6-05 for longer than the time set in L6-06.
Check parameters L6-05 and L6-06.
• Check the status of the machine being used.
• Remove the cause of the fault.
Overspeed (for simple PG feedback control modes)
oS
The motor speed feedback exceeded the F1-08 setting.
Check the setting for the overspeed detection level and the overspeed detection time (F1-08 and F1-09).
YASKAWA AC Drive L1000V Technical Manual
6.4 Alarm Detection
Refer to Installation Orientation and Spacing on
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
6
179