20
TOMPYEUOQ2A03C AC Drive Q2A Installation and Operation Instructions
Code
Name
Causes
Possible Solutions
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 value set in Acceleration/Deceleration Times
C1-
01 to C1-08
.
Overload occurred while running at low speed.
•
Lower the load when running at low speed.
•
Increase the motor speed.
•
If the motor is run frequently at low speeds, replace the motor
with a larger motor or use a drive-dedicated motor.
Note:
For general-purpose motors, overload can occur while
running at low speed when operating at below the rated
current.
L1-01 [Motor Cool Type for OL1 Calc]
is set
incorrectly.
Set
L1-01
in as specified by the motor qualities for a drive-
dedicated motor.
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 V/f Pattern Parameters
E1-04 to E1-10
. For motor 2,
adjust
E3-04 to E3-10
. Decrease the values set in
E1-08 [Mid
A Voltage]
and
E1-10 [Min Output Voltage]
.
Note:
If
E1-08
and
E1-10
are set too low, the overload tolerance will
decrease at low speeds.
E1-06 [Base Frequency]
is set incorrectly.
Set
E1-06
to the rated frequency shown on the motor nameplate.
One drive is operating more than one motor.
Set
L1-01 = 0 [Motor Cool Type for OL1 Calc = Disabled]
,
connect thermal overload relay to each motor to prevent damage
to the motor.
The electronic thermal protector qualities and the
motor overload properties do not match.
•
Examine the motor qualities and set
L1-01 [Motor Cool Type
for OL1 Calc]
correctly.
•
Connect a thermal overload relay to the motor.
The electronic thermal protector is operating at an
incorrect level.
Set
E2-01 [Mot Rated Current (FLA)]
to the value shown on the
motor nameplate.
There is increased motor loss from overexcitation
operation.
•
Lower the value set in
n3-13 [OverExcBr Gain]
.
•
Set
L3-50 ≠ 3 or 4 [StallP@Decel Mode ≠ HiFlux
Overexcitation or HiFlux2 Overexcitation]
.
•
Set
L3-04 = 0 [StallP@Decel Enable = Disabled]
.
The speed search-related parameters are set
incorrectly.
•
Examine the settings for all speed search related parameters.
•
Adjust
b3-03 [SpSrch Deceleration Time]
.
•
Set
b3-24 = 1 [SpSrch Method Selection = Speed Estimation]
after Auto-Tuning.
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.
oL2
Drive Overload
The load is too heavy.
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 value set in Acceleration/Deceleration Times
C1-
01 to C1-08
.
The V/f pattern does not fit the motor qualities.
•
Examine the ratios between the V/f pattern frequency and
voltage. Lower the voltage if it is too high compared to the
frequency.
•
Adjust V/f Pattern Parameters
E1-04 to E1-10
. Lower the
values set in
E1-08 [Mid A Voltage]
and
E1-10 [Min Output
Voltage]
For motor 2, adjust
E3-04 to E3-10
.
Note:
If
E1-08
and
E1-10
are set too low, the overload tolerance is
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 [Trq Comp 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 [SpSrch Deceleration Time]
.
•
Set
b3-24 = 1 [SpSrch Method Selection = Speed Estimation]
after Auto-Tuning.
Phase loss in the input power supply is causing the
output current to change.
•
Correct any wiring errors in the main circuit drive input power.
•
Make sure that there is no phase loss, and repair problems.
Summary of Contents for Q2A-A Series
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