Overtorque 1; Overtorque 2; Overspeed (For Simple V/F With Pg); Dc Bus Overvoltage - YASKAWA V1000 Series Installation & Start-Up Manual

oL3
Cause
Inappropriate parameter
settings.
There is a fault on the
machine side (e.g., the
machine is locked up).
LED Operator Display
oL4
Cause
Parameter settings are not
appropriate.
There is a fault on the
machine side (e.g., the
machine is locked up).
LED Operator Display
oS
Cause
Overshoot or undershoot is
occurring.
PG pulse settings are
incorrect.
Parameter settings are
inappropriate.
LED Operator Display
ov
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual

Overtorque 1

Drive output current (or torque in OLV) was greater than L6-02 for longer than the
time set in L6-03.
Possible Solutions
Check parameters L6-02 and L6-03.
• Check the status of the machine.
• Remove the cause of the fault.

Overtorque 2

Drive output current (or torque in OLV) was greater than L6-05 for longer than the
time set in L6-06.
Possible Solutions
Check parameters L6-05 and L6-06.
• Check the status of the machine being used.
• Remove the cause of the fault.

Overspeed (for Simple V/f with PG)

Pulse input (RP) indicates that motor speed feedback exceeded F1-08 setting.
Possible Solutions
• Adjust the gain by using the pulse train input parameters (H6-
02 through H6-05).
Adjust the speed feedback accuracy.
• Increase the settings for C5-01 (Speed Control Proportional
Gain 1) and reduce C5-02 (Speed Control Integral Time 1).
Set the H6-02 (Pulse Train Input Scaling) = 100%, the number
of pulses during maximum motor revolutions.
Check the setting for the overspeed detection level and the
overspeed detection time (F1-08 and F1-09).

DC Bus Overvoltage

The DC bus voltage exceeded the trip point.
For 200 V class: approximately 410 V
For 400 V class: approximately 820 V (740 V when E1-01 < 400)
5.5 Alarm Detection
Minor Fault Name
Minor Fault Name
Minor Fault Name
Minor Fault (H2-
= 10)
YES
YES
Minor Fault
Output
(H2- = 10)
YES
5
YES
Minor Fault
Output
(H2- = 10)
YES
YES
YES
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