YASKAWA
TOEPC71061737D GA800 DRIVE INSTALLATION & PRIMARY OPERATION
155
Code
Name
Causes
Possible Solutions
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 all wiring errors with the main circuit power supply.
Loose wiring in the input power terminals.
Tighten the screws to the correct tightening torque.
The drive input power voltage is changing too much.
•
Examine the supply voltage for problems.
•
Make the drive input power stable.
Unsatisfactory balance between voltage phases.
•
Examine the supply voltage for problems.
•
Make the drive input power stable.
•
If the supply voltage is good, examine the magnetic contactor on
the main circuit side for problems.
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 capacitor. Contact
Yaskawa or your nearest sales representative for more
information.
•
Examine the supply voltage 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.
PGo
Encoder (PG) Feedback Loss
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
The encoder is not receiving power.
Examine the encoder power supply.
The holding brake is stopping the motor.
Release the holding brake.
PGoH
Encoder (PG) Hardware Fault
The encoder cable is disconnected.
Correct any disconnected wires in the encoder cable.
rUn
Motor Switch during Run
The drive received a
Motor 2 Selection [H1-xx = 16]
during run.
Make sure that the drive receives the Motor 2 Selection while the
drive is stopped.
SE
Modbus Test Mode Error
MEMOBUS/Modbus communications self-
diagnostics
[H1-xx = 67]
was done while the drive
was running.
Stop the drive and do MEMOBUS/Modbus communications self-
diagnostics.
STo
Safe Torque OFF
Safe Disable inputs H1-HC and H2-HC are open.
•
Make sure that the Safe Disable signal is input from an external
source to terminal H1-HC and H2-HC.
•
When the Safe Disable function is not in use, use a jumper to
connect terminals H1-HC and H2-HC.
There is internal damage to the two Safe Disable
channels.
Replace the board or the drive. Contact Yaskawa or your nearest
sales representative to replace the board.
SToF
Safe Torque OFF
One of the two terminals H1-HC or H2-HC received
the Safe Disable input signal.
The Safe Disable input signal is wired incorrectly.
•
Make sure that the Safe Disable signal is input from an external
source to terminals H1-HC or H2-HC.
•
When the Safe Disable function is not in use, use a jumper to
connect terminals H1-HC and H2-HC.
There is internal damage to one Safe Disable channel.
Replace the board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales representative.
TiM
Keypad Time Not Set
You put a battery in the keypad, but you have not set
the date and time.
Set the date and time with the keypad.
TrPC
IGBT Maintenance Time (90%)
The IGBT is at 90% of its expected performance life.
Replace the IGBT or the drive. Contact Yaskawa or your nearest
sales representative for more information.
UL3
Undertorque Detection 1
A fault occurred on the machine.
Example: There is a broken pulley belt.
Examine the machine and remove the cause of the fault.
The parameters are incorrect for the load.
Adjust
L6-02 [Torque Detection Level 1]
and
L6-03 [Torque
Detection Time 1]
settings.
UL4
Undertorque Detection 2
A fault occurred on the machine.
Example: There is a broken pulley belt.
Examine the machine and remove the cause of the fault.
The parameters are incorrect for the load.
Adjust
L6-05 [Torque Detection Level 2]
and
L6-06 [Torque
Detection Time 2]
settings.
UL5
Mechanical Weakening Detection 2
The drive detected undertorque as specified by the
conditions for mechanical weakening detection set in
L6-08 [Mechanical Fatigue Detect Select]
.
Examine the machine for deterioration.
Uv
Undervoltage
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 a phase loss in the drive input power.
Correct errors with the wiring for main circuit drive input power.