13 Troubleshooting
YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation 89
◆ Fault
This section gives information about some of the causes and possible solutions of faults. You
must use the Fault Reset operation to remove the fault before you can operate the drive. Use the
information in this table to remove the cause of the fault.
Code Name Causes Possible Solutions
bAT
Keypad Battery Low
Voltage
The keypad battery voltage is low. Replace the keypad battery.
bCE
Bluetooth
Communication Fault
The smartphone or tablet with
DriveWizard Mobile installed is
too far from the keypad.
Use the smartphone or tablet 10 m (32.8 ft)
or nearer to the keypad.
Note:
bCE can occur when the smartphone or
tablet is 10 m (32.8 ft) or nearer to the
keypad depending on the specifications
of the smartphone or tablet.
Radio waves from a different
device are causing interference
with communications between the
smartphone or tablet and keypad.
Make sure that no device around the keypad
uses the same radio bandwidth (2400 MHz
to 2480 MHz), and prevent radio
interference.
boL
BrakingTransistor
Overload Fault
The duty cycle of the braking
transistor is high (the regeneration
power or repetition frequency is
high).
• Install a regenerative converter.
• Increase the deceleration time.
You enabled the protective
function for the braking transistor
when you have a regenerative
converter.
Set L8-55 = 0 [Internal DB
TransistorProtection Selection = Disable].
The braking transistor in the drive
is broken.
Replace the drive.
bUS
Option Communication
Error
The drive did not receive a signal
from the controller.
The communications cable wiring
is incorrect.
Correct wiring errors.
There is a short-circuit in the
communications cable or the
communications cable is not
connected.
• Repair short circuits and connect cables.
• Replace the defective communications
cable.
Electrical interference caused a
communication data error.
• Examine the control circuit lines, main
circuit lines, and ground wiring, and
decrease the effects of electrical
interference.
• Make sure that a magnetic contactor is
not the source of the electrical
interference, then use a Surge Protective
Device if necessary.
• Use only the recommended cables or
other shielded line. Ground the shield on
the controller side or the drive input
power side.
• Separate the communication wiring from
drive power lines, and install a noise
filter to the input side of the power
supply for communication.
• Decrease the effects of electrical
interference from the controller.
To Next Page
Loading...
