13 Troubleshooting
102 YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation
Code Name Causes Possible Solutions
Phase loss in the input power
supply is causing the output
current to change.
Make sure that there is no phase loss, and
repair problems.
The motor main circuit cable is too
long.
• Replace the drive with a larger capacity
model.
• Decrease C6-02 [Carrier Frequency]. Or
set C6-02 = B.
oL2 Drive Overload
The load is too large. Decrease the load.
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].
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]. Decrease the values set in
E1-08 [Mid Point A Voltage] and E1-10
[Minimum Output Voltage]. For motor 2,
adjust E3-04 to E3-10.
Note:
If the values set in E1-08 and E1-10 are
too low, the overload tolerance will
decrease at low speeds.
The drive capacity is too small. Replace the drive with a larger capacity
model.
Overload occurred while running
at low speed.
• Decrease the load when running at low
speed.
• Replace the drive with a larger capacity
model.
• Decrease the value set in C6-02 [Carrier
Frequency Selection].
The torque compensation gain is
too large.
Decrease the value set in C4-01 [Torque
Compensation Gain] to make sure that the
motor does not stall.
The speed search-related
parameters are set incorrectly.
• 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.
Phase loss in the input power
supply is causing the output
current to change.
• Correct errors with the wiring for main
circuit drive input power.
• Make sure that there is no phase loss, and
repair problems.
Overload occurred during
overexcitation deceleration.
• Decrease the value set in n3-13
[OverexcitationBraking (OEB) Gain].
• Decrease the value set in n3-21 [HSB
Current Suppression Level].
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