Cause Possible Solution
Surrounding temperature is too
high.
• Check the temperature surrounding the drive.
•
Improve the air circulation within the enclosure panel.
•
Install a fan or air conditioner to cool the surrounding area.
•
Remove anything near the drive that might be producing excessive heat.
Load is too heavy.
•
Measure the output current.
•
Lower the carrier frequency (C6-02).
•
Reduce the load.
Current flowing to control circuit
terminal
+V exceeded the tolerance
level.
• Check the current level of the terminal.
• Set the current to the control circuit terminal to be 20 mA or less.
LED Operator Display Fault Name
oL1
Motor Overload
The electrothermal sensor tripped overload protection.
Note: The
integrated
value
of
the
internal
register
for oL1 must decrease
before oL1 can be reset.
Cause Possible Solution
Load is too heavy. Reduce the load.
Cycle times are too short during
acceleration and deceleration.
Increase the acceleration and deceleration times (C1-01 through C1-04).
• Drive overloaded at low
speeds.
• Overload may occur at low
speeds when using a general-
purpose motor, even if
operating within the rated
current limitation.
• Reduce the load.
• Increase the speed.
• If the drive is supposed to operate at low speeds, either increase the motor
capacity or use a motor specifically designed to operate with the drive.
Although a special type of motor is
being used, the motor protection
selection is set for a general-
purpose motor (L1-01 = 1).
Set L1-01 to 2.
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.
Disable the Motor Protection function (L1-01 = “0”) and install a thermal relay
to each motor.
5.4 Fault Detection
142
YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
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