TOMPYEUOQ2A03C AC Drive Q2A Installation and Operation Instructions
21
Code
Name
Causes
Possible Solutions
ov
Overvoltage
Deceleration time is too short and regenerative
energy is flowing from the motor into the drive.
•
Set
L3-04 = 1 [StallP@Decel Enable = Enabled]
and
L3-50 =
0 [StallP@Decel Mode = General Purpose]
.
•
Increase the values set in
C1-02 [Decel Time 1], C1-04 [Decel
Time 2], C1-06 [Decel Time 3], or C1-08 [Decel Time 4]
.
•
Connect a dynamic braking option to the drive.
•
Perform Deceleration Rate Auto-Tuning.
The acceleration time is too short.
•
Make sure that sudden drive acceleration does not cause the
fault.
•
Increase the values set in
C1-01 [Accel Time 1], C1-03 [Accel
Time 2], C1-05 [Accel Time 3], or C1-07 [Accel Time 4]
.
•
Increase the value set in
C2-02 [Jerk@End of Accel]
.
•
Set
L3-11 = 1 [Overvolt Supression Select = Enabled]
.
The braking load is too large.
Connect a dynamic braking option to the drive.
There are surge voltages in the input power supply.
Connect a DC reactor to the drive.
Note:
If you turn the phase advancing capacitors ON and OFF and
use thyristor converters in the same power supply system,
there can be surge voltages that irregularly increase the input
voltage.
The drive output cable or motor is shorted to ground
(the current short to ground is charging the main
circuit capacitor of the drive through the power
supply).
1.
Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.
2.
Re-energize the drive.
If the drive detects ov in these conditions, the speed
search-related parameters are incorrect:
•
During speed search
•
During momentary power loss recovery
•
When the drive starts again automatically
•
Examine the settings for all speed search related parameters.
•
Set
b3-19 ≠ 0 [Speed Retry Times ≠ 0 times]
.
•
Adjust
b3-03 [SpSrch Deceleration Time]
settings.
•
Do Stationary Auto-Tuning for Line-to-Line Resistance and
then set
b3-24 = 1 [SpSrch Method Selection = Speed
Estimation]
.
The power supply voltage is too high.
Decrease the power supply voltage to match the drive rated
voltage.
The braking resistor or braking resistor unit wiring
is incorrect.
Correct wiring errors in the connection to the braking resistor or
braking resistor unit.
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
Noise interference along the encoder cable.
Isolate the encoder cable from the drive output line or a different
source of electrical interference.
Electrical interference caused a drive malfunction.
•
Examine the control circuit lines, main circuit lines, and
ground wiring, and decrease the effects of electrical
interference.
•
Make sure that a magnetic contactor is not the source of the
electrical interference, then use a Surge Protective Device if
necessary.
The load inertia is set incorrectly.
•
Examine the load inertia settings with KEB, overvoltage
suppression, or stall prevention during deceleration.
•
Adjust
L3-25 [Load Inertia Ratio]
to match the qualities of the
machine.
The Short Circuit Braking function used in OLV/
PM control method.
Connect a braking resistor to the drive.
There is motor hunting.
•
Adjust
n1-02 [HuntPrev Gain Setting]
settings.
•
Adjust
n2-02 [AFR Time 1]
and
n2-03 [AFR Time 2]
settings.
•
Adjust
n8-45 [SpdFbck Det.Gain]
and
n8-47 [Pull-In Comp.
Time Constant]
settings.
Speed search does not complete at start when you
use an induction motor in EZOLV control.
When
E9-01 = 0 [Motor Type Selection = IM]
, set
b3-24 = 2
[SpSrch Method Selection = Current Det2]
.
PF
Input Phase Loss
There is a phase loss in the drive input power.
Correct errors with the wiring for main circuit drive input power.
Loose wiring in the input power terminals.
Tighten the terminal screws to the correct tightening torque.
The drive input power voltage is changing too
much.
•
Examine the input power for problems.
•
Make the drive input power stable.
Unsatisfactory balance between voltage phases.
•
Examine the input power for problems.
•
Make the drive input power stable.
•
If the input power supply is good, examine the magnetic
contactor on the main circuit side for problems.
EN
Summary of Contents for Q2A-A Series
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