Yaskawa U1000 Industrial MATRIX Drive - Manual (Page 69)

Digital Operator Display Fault Name
oL3
Overtorque Detection 1
The current has exceeded the value set for Torque Detection Level 1 (L6-02) for longer than the allowable
time (L6-03).
oL4
Overtorque Detection 2
The current has exceeded the value set for Torque Detection Level 2 (L6-05) for longer than the allowable
time (L6-06).
oL5
Mechanical Weakening Detection 1
Overtorque occurred, matching the conditions specified in L6-08.
oPr
External Digital Operator Connection Fault
The external operator has been disconnected from the drive.
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).
oS
Overspeed
The motor speed feedback exceeded the F1-08 setting.
ov
Control Circuit Overvoltage
Voltage in the control circuit has exceeded the overvoltage level.
• For 200 V class drives: approximately 450 V
• For 400 V class drives: approximately 900 V
PGo
PG Disconnect (for any control modes using a PG option card)
No PG pulses are received for longer than the time set to F1-14.
PGoH
PG Hardware Fault (detected when using a PG-X3 option card)
PG cable is not connected properly.
SCF
Safety Circuit Fault
Safety Circuit Fault is detected.
SEr
Too Many Speed Search Restarts
The number of Speed Search restarts exceeded the value set to b3-19.
SoH Snubber Discharge Resistor Overheat
SrC
Phase Order Detection Fault
The phase rotation direction for the input power supply changed.
Srr
Internal Resistance Fault
An operation failure occurred in the snubber discharge resistor circuit.
STo
Pull-Out Detection
Motor pull out or step out has occurred. Motor has exceeded its pull-out torque.
SvE
Zero Servo Fault
Position deviation during zero servo.
UL3
Undertorque Detection 1
The current has fallen below the minimum value set for Torque Detection Level 1 (L6-02) for longer than
the allowable time (L6-03).
UL4
Undertorque Detection 2
The current has fallen below the minimum value set for Torque Detection Level 2 (L6-05) for longer than
the allowable time (L6-06).
UL5
Mechanical Weakening Detection 2
The operation conditions matched the conditions set to L6-08.
Uv1
Control Circuit Undervoltage Fault
Voltage in the control circuit fell below the detection level:
• For 200 V class drives: approximately 175 V
• For 400 V class drives: approximately 350 V
Uv2
Control Power Supply Voltage Fault
Voltage is too low for the control drive input power.
Uv3
Undervoltage 3 (Soft-Charge Bypass Relay Fault)
The soft-charge bypass relay failed.
i.6 Troubleshooting
YASKAWA ELECTRIC TOEP C710636 04C U1000 Industrial MATRIX Drive Quick Start Guide 69