YASKAWA
TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
131
Code
Name
Causes
Possible Solutions
oL1
Motor Overload
The load is too large.
Decrease the load.
Note:
Reset
oL1
when
U4-16 [Motor oL1
Level]
< 100.
The acceleration/deceleration
times or cycle times are too
short.
•
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]
.
Overload occurred while
running at low speed.
•
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.
L1-01 [Motor Overload (oL1)
Protection]
is set incorrectly.
Set
L1-01
in as specified by the motor
qualities for a drive-dedicated motor.
The V/f pattern does not fit the
motor qualities.
•
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.
E1-06 [Base Frequency]
is set
incorrectly.
Set
E1-06
to the rated frequency shown
on the motor nameplate.
One drive is operating more
than one motor.
Set
L1-01 = 0 [Motor Overload (oL1)
Protection = Disabled]
, connect thermal
overload relay to each motor to prevent
damage to the motor.