YASKAWA A1000 Technical Manual page 352

6.5 Alarm Detection
Digital Operator Display
Cause
Sequence error
Digital Operator Display
Cause
An external fault was received from the PLC with
F6-03 = 3 (causing the drive to continue running
when an external fault occurs).
There is a problem with the PLC program.
Digital Operator Display
Cause
An external device has tripped an alarm function.
Wiring is incorrect.
Multi-function contact inputs are set incorrectly.
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 settings for b5-36 and b5-37 are
incorrect.
PID feedback wiring is faulty.
Feedback sensor has malfunctioned.
Feedback input circuit is damaged.
352
Forward/Reverse Run Command Input Error
EF
Both forward run and reverse run closed simultaneously for over 0.5 s.
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
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 multi-function input value.
• Ensure the signal lines have been connected properly to the terminals assigned for external fault detection
(H1- = 2C to 2F).
• Reconnect the signal line.
• Check if the unused terminals have been set for H1- = 2C to 2F (External Fault).
• Change the terminal settings.
Internal Fan Fault
FAn
Fan or magnetic contactor failed (Detected when L8-32 = 3 or 4).
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
The PID feedback input is higher than the level set in b5-36 for longer than the time set in b5-37, and b5-12 is set to 1 or 4.
Check parameters b5-36 and b5-37.
Correct the wiring.
Check the sensor and replace it if damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
YASKAWA or your nearest sales representative.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES