YASKAWA iQpump1000 User Manual page 271

HOA Keypad Display
Wire-break on Analog Input Terminal
programmed for Backup PI Feedback
(H3-oo = 24)
Backup PI Feedback Transducer is broken. Replace Backup PI Feedback Transducer.
HOA Keypad Display
bAT
Cause
The digital operator battery is low
HOA Keypad Display
bb
Cause
External baseblock signal was entered via
one of the multi-function input terminals
(S1 to S8).
HOA Keypad Display
boL
Cause
The proper braking resistor has not been
installed.
HOA Keypad Display
bUS
Cause
Connection is broken or master controller
stopped communicating.
Option is damaged.
The option is not properly connected to the
drive.
A data error occurred due to noise.
HOA Keypad Display
CALL
Cause
Communications wiring is faulty, there is a
short circuit, or something is not connected
properly.
Programming error on the master side.
Communications circuitry is damaged.
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
Check the connection of the Backup Feedback transducer.
Digital Operator Battery Voltage Low
Replace the digital operator battery.
Baseblock
Drive output interrupted as indicated by an external baseblock signal.
Check external sequence and baseblock signal input timing.
Braking Transistor Overload Fault
The braking transistor in the drive has been overloaded.
Select the proper braking resistor.
Option Communication Error
• The connection was lost after initial communication was established.
• Assign a Run command frequency reference to the option.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
If there are no problems with the wiring and the fault continues to occur, replace the option.
• The connector pins on the option are not properly lined up with the connector pins on the drive.
• Reinstall the option.
• Check options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit wiring, main circuit lines and ground wiring.
• Try to reduce noise on the controller side.
• Use surge absorbers on magnetic contactors or other equipment causing the disturbance.
• Use recommended cables or some other type of shielded line. Ground the shield to the controller side or
on the input power side.
• Separate the wiring for communication devices from the drive input power lines. Install an EMC noise
filter to the drive input power.
Serial Communication Transmission Error
Communication has not yet been established.
• Check for wiring errors.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Check communications at start-up and correct programming errors.
• Perform a self-diagnostics check.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing
the control board, contact Yaskawa or your nearest sales representative.
Minor Fault Name
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
5.3 Alarm Detection
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