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Digital Operator Display
Minor Fault Name
Cause
Possible Solutions
Inappropriate parameter settings.
Check parameters L6-02 and L6-03.
There is a fault on the machine side (e.g.,
the machine is locked up).
• Check the status of the machine.
• Remove the cause of the fault.
Digital Operator Display
Minor Fault Name
oL4
Overtorque 2
Drive output current (or torque in OLV, CLV, AOLV/PM, CLV/PM) was greater than L6-05 for longer than
the time set to L6-06.
Cause
Possible Solutions
Parameter settings are not appropriate.
Check parameters L6-05 and L6-06.
There is a fault on the machine side (e.g.,
the machine is locked up).
• Check the status of the machine being used.
• Remove the cause of the fault.
Digital Operator Display
Minor Fault Name
oL5
Mechanical Weakening Detection 1
Overtorque occurred, matching the conditions specified in L6-08.
Cause
Possible Solutions
Overtorque occurred, triggering the
mechanical weakening level set to L6-08. Check for the cause of mechanical weakening.
Digital Operator Display
Minor Fault Name
oS
Overspeed
The motor speed feedback exceeded the F1-08 setting.
Cause
Possible Solutions
Overshoot is occurring.
• Increase the settings for C5-01 (Speed Control Proportional Gain 1) and reduce C5-02 (Speed Control
Integral Time 1).
• If using a Closed Loop Vector mode enable Feed Forward Control 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 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 PG pulse number 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
Minor Fault Name
ov
Control Circuit Overvoltage
Voltage in the control circuit has exceeded the trip point.
• For 200 V class drives: approximately 450 V
• For 400 V class drives: approximately 900 V
Cause
Possible Solution
Surge voltage present in the drive input
power.
Voltage surge can result from a thyristor convertor and a phase advancing capacitor operating on the same
drive input power system.
Drive input power voltage is too high.
• Check the voltage.
• Lower drive input power voltage within the limits listed in the specifications.
The capacity of the input power supply is
too small.
Use a power supply that has at least twice the input capacity of the drive.
The input power supply repeatedly turned
on and off over a short period of time.
Implement countermeasures so that chattering does not occur for the input power supply.
An I/O terminal is loose.
Check the tightening torque of the I/O terminals.
There is a phase loss or an imbalance in the
interphase voltages of the input power
supply.
Check the status of the input power supply and eliminate phase losses and imbalance.
Digital Operator Display
Minor Fault Name
PASS
MEMOBUS/Modbus Comm. Test Mode Complete
Cause
Possible Solutions
6.5 Alarm Detection
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YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
Содержание U1000 iQpump Drive
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