YASKAWA A1000 Technical Manual page 340

6.4 Fault Detection
Digital Operator Display
Cause
Data has not been received from the PLC, triggering the
watchdog timer.
Digital Operator Display
Cause
An external fault was received from the PLC with other
than F6-03 = 3 "alarm only" (the drive continued to run
after external fault).
Problem with the PLC program.
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
Noise has corrupted data while writing to the EEPROM.
Hardware problem.
Digital Operator Display
Cause
Internal cooling fan has malfunctioned (models 2A0360,
2A0415, 4A0362 to 4A1200).
Fault detected in the internal cooling fan or magnetic
contactor to the power supply (models 2A0250 to
2A0415, 4A0165 to 4A1200).
Digital Operator Display
Cause
Parameters are not set appropriately.
Wiring for PID feedback is incorrect.
There is a problem with the feedback sensor.
340
MECHATROLINK Watchdog Timer Error
E5
The watchdog has timed out.
 Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command and proceed to phase 3.
Option Card External Fault
EF0
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Check the PLC program and correct problems.
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- = 20 to 2B).
• Reconnect the signal line.
• Check if the any unused terminals are set for H1- = 20 to 2B (External Fault).
• Change the terminal settings.
EEPROM Write Error
Err
Data cannot be written to the EEPROM.
• Press the
• Correct the parameter setting.
• Cycle power to the drive.
• Replace either the control board or the entire drive. For instructions on replacing the control board, contact YASKAWA or your
nearest sales representative.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact YASKAWA or your
nearest sales representative.
Internal Fan Fault
FAn
Fan or magnetic contactor failed (detected when L8-32 = 0 to 2).
Cycle power to the drive and see if the fault is still present.
Check if the fan is operating or not.
Verify the cumulative operation time of the fan using monitor U4-03, and the fan maintenance timer in U4-04.
If the cooling fan has passed its expected performance life or is damaged in some way, replace the fan.
Cycle power to the drive and see if the fault is still present.
If the fault still occurs, either replace the control circuit board or the entire unit.
For instructions on replacing the power board, contact the YASKAWA sales office directly or your nearest YASKAWA
representative.
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.
Check the settings of parameters b5-36 and b5-37.
Correct the wiring.
• Check the sensor on the control side.
• Replace the sensor if damaged.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
button.
Refer to Diagnosing and Resetting Faults on page
Fault Name
Possible Solution
Fault Name
Possible Solution
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
366.