HOA Keypad Display
Minor Fault Name
Cause
Possible Solution
Sequence error
Check the forward and reverse command sequence and correct the problem.
Note:
When minor fault EF detected, motor ramps to stop.
HOA Keypad Display
Minor Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause
Possible Solution
An external fault was received from the
PLC with F6-03 set to 3, which allows the
drive to continue running after an external
fault occurs.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
There is a problem with the PLC program. Check the PLC program and correct problems.
HOA Keypad Display
Minor Fault Name
EF1
Pump Fault (Input Terminal S1)
External fault at multi-function input terminal S1.
EF2
Pump fault (input terminal S2)
External fault at multi-function input terminal S2.
EF3
Pump fault (input terminal S3)
External fault at multi-function input terminal S3.
EF4
Pump fault (input terminal S4)
External fault at multi-function input terminal S4.
EF5
Pump fault (input terminal S5)
External fault at multi-function input terminal S5.
EF6
Pump fault (input terminal S6)
External fault at multi-function input terminal S6.
EF7
Pump fault (input terminal S7)
External fault at multi-function input terminal S7.
EF8
Pump fault (input terminal S8)
External fault at multi-function input terminal S8.
Cause
Possible Solutions
An external device has tripped an alarm
function.
Remove the cause of the external fault and reset the multi-function input value.
Wiring is incorrect.
• Ensure the signal lines have been connected properly to the terminals assigned for pump fault detection
(H1-
oo
= 20 to 2F).
• Reconnect the signal line.
Multi-function contact inputs are set
incorrectly.
• Check if the unused terminals have been set for H1-
oo
= 20 to 2F (Pump Fault).
• Change the terminal settings.
HOA Keypad Display
Minor Fault Name
FAn
Internal Fan Error
Fan or magnetic contactor failure
Cause
Possible Solution
Internal cooling fan has malfunctioned
• 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, follow the
replacement instructions in the
chapter.
Fault detected in the internal cooling fan or
magnetic contactor to the power supply.
• 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.
5.4 Alarm Detection
202
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual
