YASKAWA CIPR-GA50UВ001AJ Series Installation & Primary Operation page 131

Code Name
oL1 Motor Overload
YASKAWA TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Causes
The load is too large.
The acceleration/deceleration
times or cycle times are too
short.
Overload occurred while
running at low speed.
L1-01 [Motor Overload (oL1)
Protection] is set incorrectly.
The V/f pattern does not fit the
motor qualities.
E1-06 [Base Frequency] is set
incorrectly.
One drive is operating more
than one motor.
15 Troubleshooting
Possible Solutions
Decrease the load.
Note:
Reset oL1 when U4-16 [Motor oL1
Level] < 100.
• Examine the acceleration/deceleration
times and the motor start/stop
frequencies (cycle times).
• Increase the values set in C1-01 to
C1-08 [Acceleration/Deceleration
Times].
• Decrease the load when running at
low speed.
• Increase the motor speed.
• If the motor is run frequently at low
speeds, replace the motor with a
larger motor or use a drive-dedicated
motor.
Note:
For general-purpose motors,
overload can occur while running at
low speed when operating at below
the rated current.
Set L1-01 in as specified by the motor
qualities for a drive-dedicated motor.
• Examine the ratios between the V/f
pattern frequency and voltage.
Decrease the voltage if it is too high
compared to the frequency.
• Adjust E1-04 to E1-10 [V/f Pattern
Parameters]. For motor 2, adjust E3-
04 to E3-10. Decrease the values set
in E1-08 [Mid Point A Voltage] and
E1-10 [Minimum Output Voltage].
Note:
If the values set in E1-08 and E1-10
are too low, the overload tolerance
will decrease at low speeds.
Set E1-06 to the rated frequency shown
on the motor nameplate.
Set L1-01 = 0 [Motor Overload (oL1)
Protection = Disabled], connect thermal
overload relay to each motor to prevent
damage to the motor.
131