YASKAWA CIMR-VU BA0001 Technical Manual page 303

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 Overvoltage Occurs When Running at a Constant Speed
Cause
Excessive load inertia in Open Loop Vector Control.
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.
The torque limit function is operating in Open Loop
Vector Control.
Acceleration time has been set too long.
Motor characteristics and drive parameter settings are
incompatible with one another in V/f Control.
The right combination of motor characteristics have
not been set in Open Loop Vector 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.
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 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.
• Loads with a lot of inertia (fans, etc.) can trigger an overvoltage fault when operating in Open
Loop Vector Control.
• Switch to the V/f motor control method.
• Adjust the values set for the speed feedback detection control time constant (n2-02, n2-03).
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 terminals A1 or A2 (H3-03, H3-11).
• 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 the torque limit setting. It may be too low. (L7-01 through L7-04).
• Reset the torque limit to its default value (200%).
Check if the acceleration time parameters have been set too long (C1-01, -03, -05, -07).
• Set the correct V/f pattern so that it matches the characteristics of the motor being used.
• Check E1-03 (V/f Pattern Selection).
Execute Rotational Auto-Tuning.
• Check the multi-function analog input settings.
• Check if multi-function analog input terminal A1 or A2 is set for frequency gain (H3-02 or
H3-10 = "1"). If so, the frequency reference will be 0 if there is no voltage (current) input
provided.
• Ensure H3-02 and H3-10 are set to the proper values.
• Ensure the analog input value is set to the right value (U1-13, U1-14).
• 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.
6.9 Troubleshooting without Fault Display
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions
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