122
YASKAWA
TOEPC7106171FD FP605 DRIVE INSTALLATION & PRIMARY OPERATION
Code
Name
Causes
Possible Solutions
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.
OD
Output Disconnect
The output circuit between the drive and the motor is
open, and the drive output current is less than 5% of
E2-01 [Motor Rated Current (FLA)]
.
•
Close the disconnected output circuit between the drive and the
motor.
•
If you do not use a motor disconnect, set
Y4-42 = 0 [Disabled]
.
oH
Heatsink Overheat
The ambient temperature is high and the heatsink
temperature is more than the
L8-02 [Overheat Alarm
Level]
.
•
Measure the ambient temperature.
•
Increase the airflow around the drive.
•
Install a cooling device (cooling fan or air conditioner) to
decrease the ambient temperature.
•
Remove objects near the drive that are producing too much heat.
oH2
External Overheat (H1-XX=B)
An external device sent an
oH2
alarm.
1.
Find the external device that output the overheat alarm.
2.
Remove the cause of the problem.
3.
Clear the
Overheat Alarm (oH2) [H1-xx = B]
in MFDI
terminals S1 to S7.
oH3
Motor Overheat (PTC Input)
The thermistor wiring that detects motor temperature
is defective.
Correct wiring errors.
oL3
Overtorque 1
A fault occurred on the machine.
Example: The machine is locked.
Examine the machine and remove the cause of the fault.
oL4
Overtorque 2
A fault occurred on the machine.
Example: The machine is locked.
Examine the machine and remove the cause of the fault.
oS
Overspeed
There is overshoot.
Decrease
C5-01 [ASR Proportional Gain 1]
and increase
C5-02
[ASR Integral Time 1]
.
ov
DC Bus Overvoltage
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.
The power supply voltage is too high.
Decrease the power supply voltage to align with the drive rated
voltage.
Electrical interference caused a drive malfunction.
•
Examine the control circuit lines, main circuit lines, and ground
wiring, and minimize the effects of noise.
•
Find the source of the noise. If a magnetic contactor is the
source, use Surge Protective Device if necessary.
•
Set
L5-01 ≠ 0 [Number of Auto-Restart Attempts ≠ 0 times]
.
ovEr
Too Many Parameters Changed
You tried to change more than 150 parameters.
Make sure that parameters that do not have an effect on drive
operation are at their default settings.
Note:
•
You can change 150 parameters maximum.
•
If you change parameters that have dependencies, the drive
can detect
ovEr
when the number of changed parameters is
fewer than 150.
PASS
Modbus Communication Test
The MEMOBUS/Modbus communications test is
complete.
The
PASS
display will turn off after communications test mode is
cleared.
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.
The main circuit capacitors are unserviceable.
•
Examine the capacitor maintenance time in monitor
U4-05
[CapacitorMaintenance]
.
•
If
U4-05
is more than 90%, replace the capacitor. Contact
Yaskawa or your nearest sales representative for more
information.
•
Examine the input power for problems.
•
Re-energize the drive.
•
If the alarm stays, replace the circuit board or the drive. Contact
Yaskawa or your nearest sales representative for more
information.
