YASKAWA CIPR-GA50C Serie Manual De Instrucciones página 34

1 English
Code Name
oL1 Motor Overload
oL2 Drive Overload
ov Overvoltage
PF Input Phase Loss
34
Causes
The motor load is too large.
The drive is operating a general-
purpose motor with a high load
at lower speed than the rated
speed.
The acceleration/deceleration
times or cycle times are too
short.
The setting of the motor rated
current is incorrect.
• The load is too large.
• The drive capacity is too
small.
• The torque is too large at low
speed.
• The power supply voltage is
too high.
• The deceleration time is too
short.
• The stall prevention function
is disabled.
• The braking resistor is not
connected or is broken.
• Motor control is not stable.
• The input voltage is too high.
There is a phase loss in the drive
input power.
Loose wiring in the input power
terminals.
The drive input power voltage is
changing too much.
Unsatisfactory balance between
voltage phases.
YASKAWA TOMPC7106173UA GA500 Installation and Operation Instruction
Possible Solutions
Decrease the motor load.
Use a motor with an external cooling fan
and set the correct motor type to L1-01
[Motor Overload (oL1) Protection].
Increase the acceleration and
deceleration times.
Make sure that the rated current set in
E2-01 [Motor Rated Current (FLA)] is
correct.
• Examine the load.
• Make sure that the drive is large
enough for the load.
• The overload capability of the drive
decreases at low speeds. Decrease the
load or replace the drive with a larger
capacity drive.
• Increase the deceleration time.
• Set L3-04 ≠ 0 [Stall Prevention
during Decel ≠ Disabled] to enable
stall prevention.
• Replace the braking resistor.
• Make sure that the motor parameter
settings are correct, and adjust the
torque and slip compensation if
necessary.
• Make sure that the supply voltage is
correct for the drive specifications.
Correct all wiring errors with the main
circuit power supply.
Tighten the screws to the correct
tightening torque.
• Examine the supply voltage for
problems.
• Make the drive input power stable.
• Examine the supply voltage for
problems.
• Make the drive input power stable.
• If the supply voltage is good, examine
the magnetic contactor on the main
circuit side for problems.