YASKAWA FP605 Installation & Primary Operation page 112

20 Troubleshooting
Code Name
HIAUX High PI Aux Feedback Level
HLCE High Level Communication Errors
HWL High Water Level
LF Output Phase Loss
LF2 Output Current Imbalance
LFB Low Feedback Sensed
LOAUX Low PI Aux Feedback Level
LOP Loss of Prime
LWL Low Water Level
NMS Setpoint Not Met
nSE Node Setup Error
oC Overcurrent
112
Causes
PI Auxiliary Feedback is more than the level set in
YF-12 [PI Aux Control High Level Detect] for the
time set in YF-13 [PI Aux High Level Detection Time]
in these conditions:
• The drive is running.
• The output frequency > 0.
Communication data error occurred between the
option and the master drive when you use Gateway
function.
The master drive detects oFxxx and the slave drive
detects HLCE.
• The digital input terminal set to H1-xx = BC
[MFDI Function Selection = High Water Level]
activated or is defective.
• The digital input terminal set to H1-xx = 1BC [!
High Water Level] deactivated or is defective.
The motor main circuit cable is disconnected.
Phase loss occurred in the wiring on the output side
of the drive.
The feedback level is less than the level set in Y1-08
[Low Feedback Level] for the time set in Y1-09 [Low
Feedback Lvl Fault Dly Time].
When the drive is running, PI Auxiliary Feedback is
less than the level set in YF-09 [PI Aux Control Low
Lvl Detection] for the time set in YF-10 [PI Aux
Control Low Lvl Det Time].
The drive used the Y1-18 [Prime Loss Detection
Method] setting and measured a pump load that is
less than the level set in Y1-19 [Prime Loss Level] for
the time set in Y1-20 [Prime Loss Time], and the
output frequency is Y1-21 [Prime Loss Activation
Freq] or more.
• 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.
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].
The drive received a Run command while the Node
Setup function was active.
The load is too large.
Overheating caused damage to the motor or the motor
insulation is not satisfactory.
The motor main circuit cable is contacting ground to
make a short circuit.
A short circuit or ground fault on the drive output
side caused damage to the output transistor of the
drive.
The acceleration time is too short.
The drive is trying to operate a specialized motor or a
motor that is larger than the maximum applicable
motor output of the drive.
YASKAWA TOEPC7106171FD FP605 DRIVE INSTALLATION & PRIMARY OPERATION
Possible Solutions
• Decrease the PI Auxiliary Feedback level less than YF-12.
• Set YF-12 and YF-13 correctly.
Examine the wiring between the option and the master drive and
remove the cause of the fault.
• Decrease the water level.
• Adjust the terminal set to H1-xx = BC or 1BC.
Connect motor main circuit cable wiring. Correct wiring errors in
the main circuit drive input power.
Examine for wiring errors or disconnected wires on the output side
of the drive, and repair problems.
• Increase the feedback level to more than Y1-08.
• Set Y1-08 and Y1-09 correctly.
• Increase the PI Auxiliary Feedback level to be more than YF-09.
• Set YF-09 and YF-10 correctly.
• Examine for a dry well, air in the system, or no water in the
system. Use preferred priming method suggested by the pump
manufacturer to restart the pump.
• When there is resistance in the pump, let the system pump water
again.
• Set Y1-18 to Y1-21 correctly.
• Increase the water level.
• Adjust the terminal set to H1-xx = BB or 1BB.
• Examine for a blocked impeller, over cycling, or broken pipe.
• Set Y1-15 and Y1-16 correctly.
Stop the drive when the Node Setup function is in use.
• 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.
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
• 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.
• 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.
• 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.
• 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.