YASKAWA Z1000 User Manual page 210

5.4 Fault Detection
Digital Operator Display
Cause
Parameter settings are not appropriate for the
load
Fault on the machine side (e.g., machine is
locked up)
Digital 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
is too short
Digital Operator Display
Cause
External operator is not properly connected to
the drive
210
Overtorque Detection 1
oL3
The current has exceeded the value set for Torque Detection Level 1 (L6-02) for longer than the allowable
time (L6-03).
Check L6-02 and L6-03 settings.
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 to n3-04 during High Slip Braking.
• Reduce deceleration times in parameters C1-02 and C1-04 for 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 setting of n3-04 to maximum value.
External Digital Operator Connection Fault
The external operator has been disconnected from the drive.
oPr
Note: An oPr fault will occur when all of the following conditions are true:
• Output is interrupted when the operator is disconnected (o2-06 = 1).
• The Run command is assigned to the operator (b1-02 = 0 and LOCAL has been selected).
• Check the connection between the operator and the drive.
• Replace the cable if damaged.
• Turn off the drive input power and disconnect the operator. Reconnect the operator and reapply drive
input power.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
YASKAWA TOEP YAIZ1U 03B YASKAWA AC Drive – Z1000 User Manual