YASKAWA
TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
137
Code
Name
Causes
Possible Solutions
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.
There is loose wiring in the
drive 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.
•
If the input power supply is good,
examine the magnetic contactor on
the main circuit side for problems.
There is unsatisfactory balance
between voltage phases.
•
Examine the input power for
problems.
•
Make the drive input power stable.
•
Set
L8-05 = 0 [Input Phase Loss
Protection Sel = Disabled]
.
The main circuit capacitors have
become unserviceable.
•
Examine the capacitor maintenance
time in monitor
U4-05
[CapacitorMaintenance]
. If
U4-05
is
more than 90%, replace the control
board or the drive. For information
about replacing the control board,
contact Yaskawa or your nearest sales
representative.
•
If drive input power is correct and the
fault stays, replace the control board
or the drive. For information about
replacing the control board, contact
Yaskawa or your nearest sales
representative.
PGo
Encoder (PG)
Feedback Loss
The holding brake is stopping
the motor.
Release the holding brake.
rF
Braking Resistor
Fault
The resistance of the dynamic
braking option connected to the
drive is too low.
Use a dynamic braking option that fits
the model and duty rating of the drive.
A regenerative converter or
regenerative unit is connected to
the drive.
Set
L8-55 = 0 [Internal DB
TransistorProtection = Disable]
.
rH
Braking Resistor
Overheat
The deceleration time is too
short and excessive regenerative
energy is flowing back into the
drive.
•
Check the load level, deceleration
time, and speed.
•
Decrease the load.
•
Increase the values set in
C1-02, C1-
04, C1-06, or C1-08 [Deceleration
Times]
.
•
Use a dynamic braking option that
lets you use more power.