YASKAWA V1000 Series Installation & Start-Up Manual page 217

LED Operator Display
Cause
Parameter settings are not
appropriate for the type of load.
There is a fault on the machine side
(e.g., the machine is locked up).
LED Operator Display
Cause
Excessive load inertia.
Motor is driven by the load.
Something on the load side is
restricting deceleration.
The overload time during High-slip
Braking during is too short.
LED Operator Display
Cause
LED operator is not connected to the
drive.
LED Operator Display
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
Overtorque Detection 2
oL4
The current has exceeded the value set for Overtorque Detection 2 (L6-05) for
longer than the allowable time (L6-06).
Check the settings of parameters L6-05 and L6-06.
Check the status of the load.
Remove the cause of the fault.
High-slip Braking OL
oL7
The output frequency stayed constant for longer than the time set in n3-04
during High-slip Braking.
• Reduce deceleration times using parameters C1-02, -04, -06 and -08 in
applications that do not use High-slip Braking.
• Use a braking resistor to shorten deceleration time.
• Increase parameter n3-04 (High-slip Braking Overload Time).
• Install a thermal relay and increase the parameter setting of n3-04 to the
maximum value.
Digital Operator Connection Fault
• The LED operator has been disconnected from the drive.
Note: An oPr fault will occur when all of the following conditions are true:
oPr
• The drive is set so that output is interrupted when the operator is disconnected
(o2-06 = 1).
• The run command is assigned to the LED operator
(b1-02 = 0 and LOCAL has been selected).
• Check the connection between the LED operator and the drive.
• Replace the cable if damaged.
• Turn off the drive input power and disconnect the LED operator. Next
reconnect the operator and turn the drive input power back on.
Overspeed (Simple V/f with PG)
oS
Pulse input (RP) indicate that the motor speed feedback exceeded the setting in
F1-08 for longer than the time set to F1-09.
5.5 Fault Detection
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
5
217