YASKAWA A1000 HHP Programming Manual page 209

Digital Operator Display
Motor has overheated.
Digital Operator Display
oH5
Cause
Motor has overheated.
Digital Operator Display
oL3
Cause
Inappropriate parameter settings.
There is a fault on the machine side (e.g.,
the machine is locked up).
Digital Operator Display
oL4
Cause
Parameter settings are not appropriate.
There is a fault on the machine side (e.g.,
the machine is locked up).
Digital Operator Display
oL5
Cause
Overtorque occurred, triggering the
mechanical weakening level set to L6-08.
Digital Operator Display
Cause
Overshoot is occurring.
Incorrect speed feedback scaling if terminal
RP is used as speed feedback input in V/f
control
Incorrect PG pulse number has been set
Inappropriate parameter settings.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
• Check the load size, accel/decel times, and cycle times.
• Decrease the load.
• Increase accel and decel times (C1-01 to C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). This involves reducing E1-08 and E1-10.
Note: Refrain from lowering E1-08 and E1-10 excessively to prevent a reduction in load tolerance
at low speeds.
• Check the motor-rated current.
• Enter motor-rated current on motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Motor Overheat (NTC Input)
The motor temperature exceeded the level set to L1-16 (or L1-18 for motor 2)
• Reduce the load.
• Check the ambient temperature.
Overtorque 1
Drive output current (or torque in OLV, CLV, AOLV/PM, and CLV/PM) was greater than L6-02 for longer
than the time set to L6-03.
Check parameters L6-02 and L6-03.
• Check the status of the machine.
• Remove the cause of the fault.
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.
Check parameters L6-05 and L6-06.
• Check the status of the machine being used.
• Remove the cause of the fault.
Mechanical Weakening Detection 1
Overtorque occurred, matching the conditions specified in L6-08.
Check for the cause of mechanical weakening.
Overspeed
oS
The motor speed feedback exceeded the F1-08 setting.
• 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.
• 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.
Check and correct parameter F1-01.
Check the setting for the overspeed detection level and the overspeed detection time (F1-08 and F1-09).
Minor Fault Name
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
2.5 Alarm Detection
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