Troubleshooting
7
7.5 Minor Faults/Alarms
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual 273
7.5 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
The node address for the option card is not in the
permitted setting range.
• For CC-Link communication, set F6-10 [CCLink Node
Address] correctly.
• For MECHATROLINK communication, set F6-20 [MLII
Address] correctly.
• For CANopen communication, set F6-35 [CANopen Address]
correctly.
Note:
If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
Code Name Causes Possible Solutions
bAT Keypad Battery Low Voltage
The keypad battery voltage is low. Replace the keypad battery.
Note:
• If detected, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection = Alarm] will
switch ON.
• Set o4-24 [bAT Detection Selection] to enable/disable bAT detection.
Code Name Causes Possible Solutions
bb Baseblock
An external baseblock command was entered
through MFDI terminal DI1 to DI8, and the drive
output stopped as shown by an external baseblock
command.
Examine the external sequence and timing of the baseblock
command input.
Note:
The drive will not output an alarm signal for this alarm.
Code Name Causes Possible Solutions
bCE Bluetooth Communication Error
The smart device with DriveWizard Mobile is too
far from the keypad.
Use the smart device within 10 m (32.8 ft.) 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.
Note:
• The drive detects this error when using the Bluetooth LCD keypad to operate the drive with a smart device.
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
• Use o2-27 [BLE Disconn.Selection@BLE Ctrl] to enable and disable bCE detection.
Code Name Causes Possible Solutions
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.
You enabled the protective function for the braking
transistor when you have a regenerative converter.
Set L8-55 = 0 [DB IGBT Protection = Disable].
The braking transistor in the drive is broken. Replace the drive.
Note:
If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
Code Name Causes Possible Solutions
bUS Option Communication Error
The communications cable wiring is incorrect. Correct wiring errors.
There is a short circuit 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 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 card is incorrectly installed to the drive. Correctly install the option card to the drive.
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