Troubleshooting
7
7.4 Faults
SIEPCYEUOQ2V01A Q2V Technical Manual 229
Code Name Causes Possible Solutions
The gain during overexcitation operation is too
large.
• Find the time when the fault occurs.
• If the fault occurs at the same time as an overexcitation
operation, decrease n3-13 [OverExcBr 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 [SpSrch@Start Selection = Enabled] or set H1-
xx = 67, 68 [SpdSrch Fmax, SpdSrch 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 Mot 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 [High-
Freq Injection = 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 PoleDet Pgain] in 0.5-unit
increments.
Note:
Set n8-41 > 0.0 for an ordinary IPM motor.
The control method is set incorrectly for the motor. Set A1-02 [Control Method] correctly.
The motor main circuit cable is too long. • Replace the drive with a larger capacity model.
• Decrease C6-02 [Carrier Frequency Selection]. Or set C6-02
= B.
Speed search does not complete at start when you
set A1-02 = 8 [EZ Vector] and use an induction
motor.
When E9-01 = 0 [Motor Type Selection = IM], set b3-24 = 2
[SpSrch Method Selection = Current Det2].
An overcurrent occurred during overexcitation
deceleration.
• Decrease n3-13 [OverExcBr Gain].
• Decrease n3-21 [OverExcBr Current Level].
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 = PM
OLVector, PM AOLVector, or EZ Vector], the output
current is more than the value set in L8-27
[OverCurr Det 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.
Code Name Causes Possible Solutions
oFA03 to
oFA06
Option Card Error Occurred at
Option Port (CN5)
A fault occurred in the option card. 1. De-energize the drive.
2. Make sure that the option card is correctly connected to the
connector.
3. If the problem continues, replace the option card.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
oFA10, oFA11
Option Card Error Occurred at
Option Port (CN5)
A fault occurred in the option card. 1. De-energize the drive.
2. Make sure that the option card is correctly connected to the
connector.
3. If the problem continues, replace the option card.
Note:
Do a Fault Reset to clear the fault.
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