YASKAWA A1000 Series Quick Start Manual page 102

5 Troubleshooting
Digital Operator Display
Cause
An external device has tripped an alarm
function.
Wiring is incorrect.
Incorrect setting of multi-function contact
inputs.
Digital Operator Display
Cause
Motor insulation is damaged.
A damaged motor cable is creating a short
circuit.
The leakage current at the drive output is
too high.
The drive started to run during a current
offset fault or while coasting to a stop.
Hardware problem.
102
External Fault (input terminal S1)
EF1
External fault at multi-function input terminal S1.
External Fault (input terminal S2)
EF2
External fault at multi-function input terminal S2.
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
Remove the cause of the external fault and reset the fault.
• Ensure the signal lines have been connected properly to the terminals assigned for external fault
detection (H1-
• Reconnect the signal line.
• Check if the any unused terminals are set for H1-
• Change the terminal settings.
EEPROM Write Error
Err
Data cannot be written to the EEPROM.
Internal Fan Fault
FAn
Fan or magnetic contactor failed.
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 through 2A0415 and 4A0018
through 4A0675.
• 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-
Note: Speed Search 1 and 2 are the same when using PM OLV.
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Fault Name
Possible Solution
= 20 to 2F).
Fault Name
Possible Solution
= 61 or 62) via one of the external terminals.
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
= 20 to 2F (External Fault).
.