TOMPYEUOQ2A03C AC Drive Q2A Installation and Operation Instructions
19
Code
Name
Causes
Possible Solutions
oC
Overcurrent
The load is too heavy.
•
Measure the current flowing into the motor.
•
Replace the drive with a larger capacity model if the current
value is more than the drive rated current.
•
Decrease the load or replace with a larger drive to prevent
sudden changes in the current level.
Overheating caused damage to the motor or the
motor insulation is not satisfactory.
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
The motor main circuit cable is contacting ground
to make a short circuit.
•
Examine the motor main circuit cable for damage, and repair
short circuits.
•
Measure the resistance between the motor main circuit cable
and the ground terminal. If there is electrical conduction,
replace the cable.
A short circuit or ground fault on the drive output
side caused damage to the output transistor of the
drive.
•
Make sure that there is not a short circuit in terminal B1 and
terminals U/T1, V/T2, and W/T3. Make sure that there is not a
short circuit in terminals - and terminals U/T1, V/T2, and W/
T3.
•
If there is a short circuit, contact the manufacturer or your
nearest sales representative.
The acceleration time is too short.
•
Calculate the torque necessary during acceleration related to
the load inertia and the specified acceleration time.
•
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]
until
you get the necessary torque.
•
Increase the values set in
C2-01 [Jerk@Start of Accel], C2-02
[Jerk@End of Accel], C2-03 [Jerk@Start of Decel], and C2-
04 [Jerk@End of Decel]
until you get the necessary torque.
•
Replace the drive with a larger capacity model.
The drive is trying to operate a specialized motor or
a motor that is larger than the maximum applicable
motor output of the drive.
•
Examine the motor nameplate, the motor, and the drive to
make sure that the drive rated current is larger than the motor
rated current.
•
Replace the drive with a larger capacity model.
A magnetic contactor was switched at the output.
Set the operation sequence to not turn ON or OFF the magnetic
contactor while the drive is outputting voltage.
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 V/f Pattern Parameters
E1-04 to E1-10
. For motor 2,
adjust
E3-04 to E3-10
.
The torque compensation gain is too large.
Decrease the value set in
C4-01 [Trq Comp 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 [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 [Speed Srch 1 or 2]
to input speed search
commands from the MFDI terminals.
The motor code is set incorrectly for PM Control
Methods.
•
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: 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: PM MOTOR SETTINGS
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 IPM motors.
The current flowing in the motor is more than the
value set in
L8-27 [OverCurr Det Gain]
for PM
Control.
Correct the value set in
L8-27
.
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.
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]
.
oL1
Motor Overload
The load is too heavy.
Decrease the load.
Note:
Reset
oL1
when
U4-16 [MotorOLEstimate (oL1)]
< 100.
EN
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