Yaskawa J1000 Compact V/f Control Drive - Manual (Page 136)

Digital Operator Display Fault Name
Voltage is too high for the V/f
characteristics.
• Adjust the user set V/f patterns (E1-04 through E1-10). Parameters E1-08 and
E1-10 may need to be reduced.
• If E1-08 and E1-10 are set too high, there may be very little load tolerance at
low speed.
The wrong motor-rated current is
set to E2-01.
• Check the motor-rated current.
• Enter the value written on the motor nameplate to parameter E2-01.
The motor base frequency for the
drive input power is set too low.
• Check the rated frequency indicated on the motor nameplate.
• Enter the rated frequency to E1-06 (Base Frequency).
Multiple motors are running off the
same drive.
Set L1-01 to 0 to disable the Motor Protection function and install a thermal relay
to each motor.
The electrical thermal protection
characteristics and motor overload
characteristics do not match.
• Check the motor characteristics.
• Correct the value set to L1-01 (Motor Protection Function).
• Install an external thermal relay.
The electrical thermal relay is
operating at the wrong level.
• Check the current rating listed on the motor nameplate.
• Check the value set for the motor-rated current (E2-01).
Motor overheated by
overexcitation operation.
• Overexcitation increases the motor losses and the motor temperature. If applied
too long, motor damage can occur. Prevent excessive overexcitation operation
or apply proper cooling to the motor
• Reduce the excitation deceleration gain (n3-13).
• Set L3-04 (Stall Prevention during Deceleration) to a value other than 4.
Output current fluctuation due to
input phase loss
Check the power supply for phase loss.
Digital Operator Display Fault Name
oL2
Drive Overload
The thermal sensor of the drive triggered overload protection.
Cause Possible Solution
Load is too heavy. Reduce the load.
Cycle times are too short during
acceleration and deceleration.
Increase the settings for the acceleration and deceleration times (C1-01 through
C1-04).
Voltage is too high for the V/f
characteristics.
• Adjust the preset V/f pattern (E1-04 through E1-10). This will mainly involve
reducing E1-08 and E1-10.
• Be careful not to lower E1-08 and E1-10 excessively because this reduces load
tolerance at low speeds.
Drive capacity is too small. Replace the drive with a larger model.
Overload occurred when operating
at low speeds.
• Reduce the load when operating at low speeds.
• Replace the drive with a model that is one frame size larger.
• Lower the carrier frequency (C6-02).
Excessive torque compensation.
Reduce the torque compensation gain (C4-01) until there is no speed loss but less
current.
5.4 Fault Detection
136 YASKAWA ELECTRIC TOEP C710606 26D YASKAWA AC Drive – J1000 Quick Start Guide