90
YASKAWA
TOEPC7106171GA FP605 Drive Installation & Primary Operation
Code
Name
Causes
Possible Solutions
LWL
Low Water Level
•
The digital input terminal set to
H1-xx = BB
[MFDI Function Selection = Low Water Level]
activated or is defective.
•
The digital input terminal set to
H1-xx = 1BB [!
Low Water Level]
deactivated or is defective.
•
Increase the water level.
•
Adjust the terminal set to
H1-xx = BB or 1BB
.
NMS
Setpoint Not Met
The feedback deviates from the setpoint at a level
more than
Y1-15 [Maximum Setpoint Difference]
for
the time set in
Y1-16 [Not Maintaining Setpoint
Time]
.
•
Examine for a blocked impeller, over cycling, or broken pipe.
•
Set
Y1-15
and
Y1-16
correctly.
nSE
Node Setup Error
The drive received a Run command while the Node
Setup function was active.
Stop the drive when the Node Setup function is in use.
oC
Overcurrent
The load is too large.
•
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 terminals - and
terminals U/T1, V/T2, and W/T3.
•
If there is a short circuit, contact Yaskawa 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 or C1-03 [Acceleration Times]
to get the necessary torque.
•
Increase the values set in
C2-01 to C2-04 [S-Curve
Characteristics]
to 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
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.
The motor code setting is incorrect for PM Control
Methods.
•
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.
The current flowing in the motor is more than the
value set in
L8-27 [Overcurrent Detection Gain]
for
PM Control Methods.
Correct the value set in
L8-27
.
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.
