YASKAWA J1000 Technical Manual page 150

n oPE02 Error Occurs when Lowering the Motor Rated Current Setting
Cause
The motor rated current and the motor no-load current
settings in the drive are incorrect.
n Motor Stalls During Acceleration or With Large Loads
Cause
Load is too heavy.
n Motor Will Not Accelerate or the Acceleration Time is Too Long
Cause
Frequency reference is too low.
Load is too heavy.
Acceleration time has been set
too long.
Motor characteristics and drive
parameter settings are
incompatible with one another in
V/f Control.
Incorrect frequency reference
setting.
The Stall Prevention level during
acceleration and deceleration set
too low.
The Stall Prevention level during
run has been set too low.
n Drive Frequency Reference Differs from the Controller Frequency Reference Command
Cause
The analog input frequency gain and bias are set to
incorrect values.
n Poor Speed Control Accuracy
Cause
Slip compensation function disabled or set up
incorrectly.
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
The user is trying to set the motor rated current in E2-01 to a value lower than the no-load current
set in E2-03.
• Make sure that value set in E2-01 is higher than E2-03. Setting E2-01 < E2-03 will trigger an
oPE02 error.
• If it is necessary to set E2-01 lower than E2-03, first lower the value set to E2-03, then change
the setting in E2-01 as needed.
Take the following steps to resolve the problem:
• Reduce the load.
• Increase the acceleration time.
• Increase motor capacity.
• Although the drive has a Stall Prevention function and a Torque Compensation Limit function,
accelerating too quickly or trying to drive an excessively large load can exceed the capabilities
of the motor.
• Check the maximum output frequency (E1-04).
• Increase E1-04 if it is set too low.
Check U1-01 for proper frequency reference.
Check if a frequency reference signal switch has been set to one of the multi-function input terminals.
Check for low gain level set to terminal A1 (H3-03).
• Reduce the load so that the output current remains within the motor-rated current.
• In extruder and mixer applications, the load will sometimes increase as the temperature drops.
Check if the mechanical brake is fully releasing as it should.
Check if the acceleration time parameters have been set too long (C1-01, -03).
• Set the correct V/f pattern so that it matches the characteristics of the motor being used.
• Check the motor data and adjust V/f pattern settings.
• Check the multi-function analog input settings.
• Ensure the analog input value is set to the right value (U1-13).
• Check the Stall Prevention level during acceleration (L3-02).
• If L3-02 is set too low, acceleration will take a fair amount of time.
• Increase L3-02.
• Check the Stall Prevention level during run (L3-06).
• If L3-06 is set too low, speed will drop as the drive outputs torque.
• Increase the setting value.
Check the frequency reference terminal input gain level assigned to terminal A1 (parameter
H3-03).
Adjust the slip compensation gain (C3-01).
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6.8 Troubleshooting without Fault Display
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions
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