YASKAWA A1000 HHP - Page 196

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).
Cause Possible Solution
Parameter settings are not appropriate for the
load
Check L6-02 and L6-03 settings.
Fault on the machine side (e.g., machine is
locked up)
Check the status of the load. Remove the cause of the fault.
Digital Operator Display Fault Name
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).
Cause Possible Solution
Parameter settings are not appropriate for the
load
Check the settings of parameters L6-05 and L6-06.
Digital Operator Display Fault Name
oL5
Mechanical Weakening Detection 1
Overtorque occurred, matching the conditions specified in L6-08.
Cause Possible Solution
Overtorque triggered mechanical weakening
detection level set to L6-08
Identify the cause of mechanical weakening.
Digital Operator Display Fault Name
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).
Cause Possible Solution
External operator is not properly connected to
the drive
• 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.
Digital Operator Display Fault Name
oS
Overspeed
The motor speed feedback exceeded the F1-08 setting.
Cause Possible Solution
Overshoot is occurring
• Reduce the C5-01, Speed Control Proportional Gain 1, setting and increase the C5-02, Speed Control
Integral Time 1, setting.
• If using Closed Loop Vector mode, enable Feed Forward and perform Inertia Auto-Tuning.
Incorrect speed feedback scaling if terminal
RP is used as speed feedback input in V/f
control
• Set H6-02 to the value of the speed feedback signal frequency when the motor runs at the maximum
speed.
• Adjust the input signal using parameters H6-03 through H6-05.
Incorrect number of PG pulses has been set Check and correct parameter F1-01.
Inappropriate parameter settings Check the setting for the overspeed detection level and the overspeed detection time (F1-08 and F1-09).
Digital Operator Display Fault Name
ov
Overvoltage
Voltage in the DC bus has exceeded the overvoltage detection level.
• For 400 V class drives: approximately 820 V (740 V when E1-01 is less than 400)
• For 575 V class drives: approximately 1040 V
• For 690 V class drives: approximately DC1200 V
Cause Possible Solution
2.4 Fault Detection
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YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual