YASKAWA CIPR-GA50UВ001AJ Series Installation & Primary Operation page 132

15 Troubleshooting
Code Name
oL2 Drive Overload
132
Causes
The electronic thermal protector
qualities and the motor overload
properties do not match.
The electronic thermal protector
is operating at an incorrect
level.
There is increased motor loss
from overexcitation operation.
The speed search-related
parameters are set incorrectly.
Phase loss in the input power
supply is causing the output
current to change.
The motor main circuit cable is
too long.
The load is too large.
The acceleration/deceleration
times or cycle times are too
short.
YASKAWA TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Possible Solutions
• Examine the motor qualities and set
L1-01 [Motor Overload (oL1)
Protection] correctly.
• Connect a thermal overload relay to
the motor.
Set E2-01 [Motor Rated Current (FLA)]
correctly to the value specified by the
motor nameplate.
• Lower the value set in n3-13
[OverexcitationBraking (OEB) Gain].
• Set L3-04 ≠ 4 [Stall Prevention
during Decel ≠ Overexcitation/High
Flux].
• Set n3-23 = 0 [Overexcitation
Braking Operation = Disabled].
• Examine the settings for all speed
search related parameters.
• Adjust b3-03 [Speed Search
Deceleration Time].
• Set b3-24 = 1 [Speed Search Method
Selection = Speed Estimation] after
Auto-Tuning.
Make sure that there is no phase loss, and
repair problems.
• Replace the drive with a larger
capacity model.
• Decrease C6-02 [Carrier Frequency].
Or set C6-02 = B.
Decrease the load.
• 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].