HOA Keypad Display
Fault Name
Cause
Possible Solution
Noise has corrupted data while writing to
the EEPROM
• Press “ENTER” on the keypad.
• Correct the parameter setting.
• Cycle power to the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Hardware problem
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
HOA Keypad Display
Fault Name
FAn
Internal Fan Fault
Fan or magnetic contactor failure
Cause
Possible Solution
Internal cooling fan has malfunctioned
• Cycle power to the drive.
• Check for fan operation.
• Verify the cumulative operation time of the fan with monitor U4-03, and verify the cumulative operation
time of the fan maintenance timer with U4-04.
• If the cooling fan has exceeded its expected performance life or is damaged in any other way, follow the
replacement instructions in the
Fault detected in the internal cooling fan or
magnetic contactor to the power supply.
• Cycle power to the drive.
• If the fault continues to occur, replace the power board/gate drive board or the entire drive.
• Contact Yaskawa or a Yaskawa representative for instructions on replacing the power board/gate drive
board.
HOA Keypad Display
Fault Name
FbL
PID Feedback Loss
PID feedback loss detection is programmed to trigger a fault (b5-12 = 2) and the PID feedback level is below
the detection level set to b5-13 for longer than the time set to b5-14.
Cause
Possible Solution
Parameters are set inappropriately
Check b5-13 and b5-14 settings.
Incorrect PID feedback wiring
Correct the wiring.
There is a problem with the feedback sensor
• Check the sensor on the control side.
• Replace the sensor if damaged.
HOA Keypad Display
Fault Name
FDBKL Wire Break
PID Feedback Loss
The analog input programmed for PID feedback has risen above 21 mA or fallen below 3 mA.
Cause
Possible Solution
The analog input programmed for PID
feedback loss has risen above 21 mA or
fallen below 3 mA. This is effective only
when b5-12 Feedback Loss 4 to 20 mA
Detection Selection is set to 2 (fault).
• Confirm that the PID feedback source is installed and working properly.
• Drive response to this condition is controlled by b5-12, Feedback Loss 4 to 20 mA Detection Selection
and b5-13, Feedback Loss Go To Frequency.
• Auto-restart of this fault is controlled by L5-42, Feedback Loss Fault Retry Selection.
HOA Keypad Display
Fault Name
Fdv
Power Supply Frequency Fault
The input power supply frequency exceeded the allowable frequency fluctuation.
Cause
Possible Solution
A momentary power loss occurred.
Reset the fault.
An input power supply wiring terminal is
loose.
Check for loose terminals.
The fluctuation in the voltage of the input
power supply is too large.
Increase the power supply frequency fault detection width (L2-27).
The built-in fuse is open.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
5.3 Fault Detection
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual
185
5
Troubleshooting
