YASKAWA A1000 HHP Programming Manual page 189

Internal cooling fan has malfunctioned
Fault detected in the internal cooling fan or
magnetic contactor to the power supply.
Digital Operator Display
Cause
Parameters are set inappropriately
Incorrect PID feedback wiring
There is a problem with the feedback sensor
Digital Operator Display
Cause
Parameters are set inappropriately
Incorrect PID feedback wiring
There is a problem with the feedback sensor
Digital Operator Display
Cause
Motor insulation is damaged
A damaged motor cable is creating a short
circuit
Excessive leakage current at the drive output
The drive performed a current offset
adjustment while the motor was rotating
Hardware problem
Digital Operator Display
Cause
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
• 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, replace
the cooling fan.
• 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.
Excessive PID Feedback
FbH
PID feedback input is greater than the level set to b5-36 for longer than the time set to b5-37. Set b5-12
to 2 or 5 to enable fault detection.
Check b5-36 and b5-37 settings.
Correct the wiring.
• Check the sensor on the control side.
• Replace the sensor if damaged.
PID Feedback Loss
FbL
PID feedback loss detection is programmed to trigger a fault (b5-12 = 2 or 5) and the PID feedback level
is below the detection level set to b5-13 for longer than the time set to b5-14.
Check b5-13 and b5-14 settings.
Correct the wiring.
• Check the sensor on the control side.
• Replace the sensor if damaged.
Ground Fault
GF
• A current short to ground exceeded 50% of rated current on the output side of the drive.
• Setting L8-09 to 1 enables ground fault detection.
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit and reapply power to the drive
• Check the resistance between the cable and the ground terminal
• Replace the cable.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
• The set value exceeds the allowable setting range while the drive automatically adjusts the current
offset. This generally only happens when attempting to restart a PM motor that is coasting to stop.
• Set b3-01 to 1 to enable Speed Search at Start.
• Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals.
Note: Speed Searches 1 and 2 are the same when using OLV/PM.
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.
Output Phase Loss
LF
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
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Fault Name
Possible Solution
2.4 Fault Detection
2
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