Troubleshooting
7
7.4 Fault
YASKAWA SIEPC71061753C GA500 Technical Manual 265
Code Name Causes Possible Solutions
The V/f pattern settings are incorrect. • 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.
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.
Electrical interference caused a problem. Examine the control circuit lines, main circuit lines, and ground
wiring, and decrease the effects of electrical interference.
The gain during overexcitation operation is too
large.
• Find the time when the fault occurs.
• If the fault occurs at the same time as overexcitation operation,
decrease the value set in n3-13 [OverexcitationBraking (OEB)
Gain] and consider the motor flux saturation.
The drive received a Run command while the motor
was coasting.
• Examine the sequence and input the Run command after the
motor fully stops.
• Set b3-01 = 1 [Speed Search at Start Selection = Enabled] or
set H1-xx = 61, 62 [Speed Search from Fmax or Fref] to input
speed search commands from the MFDI terminals.
In PM Control Methods, the setting of the motor
code is incorrect.
• Enter the correct motor code to E5-01 [PM Motor Code
Selection] as specified by the PM motor.
• For specialized motors, refer to the motor test report and set
E5-xx [PM Motor Settings] correctly.
If the drive detects the fault at start or in the low
speed range (10% or less) and n8-57 = 1 [HFI
Overlap Selection = Enabled] for PM Control
methods, the high frequency injection gain is too
high.
• Set E5-xx [PM Motor Parameters] correctly or do Rotational
Auto-Tuning.
• Decrease the value of n8-41 [HFI P Gain] in 0.5-unit
increments.
Note:
Set n8-41 > 0.0 for IPM motors.
The control method is set incorrectly for the motor. Set A1-02 [Control Method Selection] correctly.
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.
Speed search does not complete at start when you
set A1-02 = 8 [EZ Vector Control] and use an
induction motor.
When E9-01 = 0 [Motor Type Selection = Induction (IM)], set b3-
24 = 2 [Speed Search Method Selection = Current Detection
Speed Search].
An overcurrent 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].
When you use an IE3 premium efficiency motor. Use these values to adjust the parameters.
• b3-03 [Speed Search Deceleration Time] = default value × 2
• L2-03 [Minimum Baseblock Time] = default value × 2
• L2-04 [Powerloss V/f Recovery Ramp Time] = default value ×
2
Note:
• This fault occurs if the drive sensors detect a drive output current more than the specified overcurrent detection level.
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
oC2 Overcurrent2
When A1-02 = 5, 6, 8 [Control Method Selection =
OLV/PM, AOLV/PM, or EZOLV], the output current
is more than the value set in L8-27 [Overcurrent
Detection Gain].
Correct the value set in L8-27.
Note:
• This fault occurs if the drive sensors detect a drive output current more than the specified overcurrent detection level.
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
oFA00 Option Not Compatible with Port
The option connected to connector CN5 is not
compatible.
Connect a correct option.
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for these faults.
Code Name Causes Possible Solutions
oFA01 Option Fault/Connection Error
You changed the option card connected to
connector CN5 during operation.
1. De-energize the drive.
2. Refer to the option card manual and correctly connect the
option card to the connector on the drive.
Note:
Do a Fault Reset to clear the fault.
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