YASKAWA A1000 Technical Manual page 131

Cause
An external device has tripped an alarm
function
Wiring is incorrect
Incorrect multi-function contact input setting
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 started to run during a current offset
fault or while coasting to a stop
Hardware problem
Digital Operator Display
YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide
External Fault (input terminal S3)
EF3
External fault at multi-function input terminal S3.
External Fault (input terminal S4)
EF4
External fault at multi-function input terminal S4.
External Fault (input terminal S5)
EF5
External fault at multi-function input terminal S5.
External Fault (input terminal S6)
EF6
External fault at multi-function input terminal S6.
External Fault (input terminal S7)
EF7
External fault at multi-function input terminal S7.
External Fault (input terminal S8)
EF8
External fault at multi-function input terminal S8.
Possible Solution
Remove the cause of the external fault and reset the fault.
• Properly connect the signal lines to the terminals assigned for external fault detection
(H1-oo = 20 to 2F).
• Reconnect the signal line.
• Check for unused terminals set for H1-oo = 20 to 2F (External Fault).
• Change the terminal settings.
EEPROM Write Error
Err
Data cannot be written to the EEPROM
Internal fan fault
FAn
Fan or magnetic contactor failure
Excessive PID Feedback
FbH
PID feedback input is greater than the level set b5-36 for longer than the time set to b5-37. To enable fault
detection, set b5-12 = 2 or 5.
PID Feedback Loss
FbL
This fault occurs when 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.
Ground Fault
• A current short to ground exceeded 50% of rated current on the output side of the drive.
GF
• Setting L8-09 to 1 enables ground fault detection in models 2A0030 to 2A0415, 4A0018 to 4A1200,
and 5A0003 to 5A0099.
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit and turn the power back on.
• Check the resistance between the cable and the ground terminal
• Replace the cable.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
• The value set exceeds the allowable setting range while the drive automatically adjusts the current offset
(this happens only when attempting to restart a PM motor that is coasting to stop).
• Enable Speed Search at start (b3-01 = 1).
• Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals.
Note: Speed Search 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
5.2 Fault Detection
5
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