YASKAWA
TOEPC71061723A YASKAWA AC Drive CR700 Quick Start Guide
67
Code
Name
Causes
Possible Solutions
Uv2
Control Power Undervoltage
A drive hardware problem occurred.
•
Re-energize the drive and check if the fault still remains.
•
Replace the control board or the entire drive if the fault
continues. Contact Yaskawa or your nearest sales
representative for instructions on replacing the control board.
Uv3
Soft Charge Answerback Fault
The relay or contactor on the soft-charge bypass
relay is damaged.
•
Re-energize the drive.
•
If the fault stays, replace the control board or the drive.
•
Check monitor
U4-06 [PreChargeRelayMainte]
shows the
performance life of the soft-charge bypass relay. If
U4-06
is
more than 90%, replace the board or the drive. For information
about replacing the control board, contact Yaskawa or your
nearest sales representative.
◆
Minor Faults/Alarms
This section gives information about the causes and possible solutions when a minor fault or alarm occurs. Use
the information in this table to remove the cause of the minor fault or alarm.
Code
Name
Causes
Possible Solutions
AEr
Station Address Setting Error (CC-
Link, CANopen,
MECHATROLINK)
Option card node address is outside of the
acceptable setting range.
•
For CC-Link communication, set
F6-10 [CC-Link Node
Address]
correctly.
•
For MECHATROLINK communication, set
F6-20
[MECHATROLINK Station Address]
correctly.
•
For CANopen communication, set
F6-35 [CANopen Node ID
Selection]
correctly.
bAT
Keypad Battery Low Voltage
The voltage of keypad battery is decreased.
Replace the keypad battery.
bb
Baseblock
An external baseblock command was entered
through MFDI terminal S1 to S10, and the drive
output stopped as shown by an external baseblock
command.
Examine the external sequence and timing of the baseblock
command input.
bCE
Bluetooth Communication Error
The smart device with DriveWizard Mobile
installed is too far from the keypad.
Move the smart device to 10 m or nearer from the keypad.
Note:
bCE
can occur when the smart device is 10 m or nearer to the
keypad depending on the specifications of the smart device.
Radio waves from a different device are causing
interference with communications between the
smart device 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
Braking Transistor Overload
The duty cycle of the braking transistor is high (the
regeneration power or repetition frequency is high).
•
Install a braking unit (CDBR series).
•
Install a regenerative converter.
•
Increase the deceleration time.
The braking transistor protective function is enabled
when a regenerative converter is being used.
Set
L8-55 = 0 [InternalBrakingTransistorProtect = Disable]
.
The built-in braking transistor is damaged.
Replace the drive.
bUS
Option Communication Error
The communications cable wiring is incorrect.
Correct wiring errors.
There is a short circuit or disconnection in the
communications cable.
•
Repair disconnected cables and short circuits for proper
wiring.
•
Replace a faulty communications cable with a normal one.
Communication data error occurred due to noise.
•
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 recommended cables or other shielded line. Ground
the shield on the controller side or the drive input power side.
•
Separate all communication wiring from drive power lines,
and install a noise filter to the input side of the power supply
for communication.
•
Minimize the effects of controller noise.
The option card is not correctly connected to the
drive.
Mount the option card to the drive correctly.
The option card is damaged.
if there are no problems with the wiring and the error continues to
occur, replace the option card.
CALL
Serial Comm Transmission Error
The communications cable wiring is incorrect.
Correct wiring errors.
There is a short circuit or disconnection in the
communications cable.
•
Repair disconnected cables and short circuits for proper
wiring.
•
Replace a faulty communications cable with a normal one.
Programming error occurred on the controller side.
Examine communications at start-up and correct programming
errors.
EN