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YASKAWA
SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
6.5
Faults
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
AUXFB
PI Aux Feedback Level Loss
The analog input from the terminal set for
PI
Auxiliary Control Feedback Level [H3-xx = 27]
is
more than 21 mA or less than 3 mA for longer than 1
s.
Repair transducer or wiring.
Note:
Do a Fault Reset to clear the fault.
Code
Name
Causes
Possible Solutions
bAT
Keypad Battery Low Voltage
The keypad battery voltage is low.
Replace the keypad battery.
Note:
Use
o4-24 [bAT Detection Selection]
to enable/disable
bAT
detection.
Code
Name
Causes
Possible Solutions
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.
Note:
•
The drive detects this error when you use the Bluetooth LCD keypad and operate the drive with a smartphone or tablet.
•
Do a Fault Reset to clear the fault.
•
Set the stopping method for this fault in
o2-27 [bCE Detection Selection]
.
Code
Name
Causes
Possible Solutions
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.
The option is incorrectly installed to the drive.
Correctly install the option to the drive.
The option is damaged.
If the fault continues and the wiring is correct, replace the option.
Note:
•
The drive detects this error if the Run command or frequency reference is assigned to the option card.
•
Do a Fault Reset to clear the fault.
•
If the drive detects this error, the drive will operate the motor as specified by the stopping method set in
F6-01 [Communication Error Selection]
.
Code
Name
Causes
Possible Solutions
CE
Modbus Communication Error
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.
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