Cause Possible Solutions
Minor Fault
Output
(H2-01 = 10)
Fault reset was being executed when a run
command was entered.
• Ensure that a run command cannot be entered from the external terminals or option unit
during fault reset.
•
Turn off the run command.
YES
LED Operator Display Minor Fault Name
EF
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for over 0.5 s.
Cause Possible Solutions
Minor Fault
Output
(H2-01 = 10)
Sequence error
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
YES
LED Operator Display Minor Fault Name
EF1
External fault (input terminal S1)
External fault at multi-function input terminal S1.
EF2
External fault (input terminal S2)
External fault at multi-function input terminal S2.
EF3
External fault (input terminal S3)
External fault at multi-function input terminal S3.
EF4
External fault (input terminal S4)
External fault at multi-function input terminal S4.
EF5
External fault (input terminal S5)
External fault at multi-function input terminal S5.
Cause Possible Solutions
Minor Fault
Output
(H2-01 = 10)
An external device has tripped an alarm
function.
Remove the cause of the external fault and reset the multi-function input value. YES
Wiring is incorrect.
• Ensure
the signal lines have been connected properly to the terminals assigned for external
fault detection (H1-oo = 20 to 2F).
• Reconnect the signal line.
YES
Multi-function contact inputs are set
incorrectly.
•
Check if the unused terminals have been set for H1-oo = 20 to 2F (External Fault).
•
Change the terminal settings.
YES
LED Operator Display Minor Fault Name
oH
Heatsink Overheat
The temperature of the heatsink exceeded the overheat pre-alarm level.
Cause Possible Solutions
Minor Fault
Output
(H2-01 = 10)
Surrounding temperature is too high
• Check the surrounding temperature.
•
Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool surrounding area.
• Remove anything near drive that may cause extra heat.
YES
Internal cooling fan has stopped.
• Replace the cooling fan. Refer to Cooling Fan Replacement on page 161.
• After replacing the drive, reset the cooling fan maintenance parameter to (o4-03 = “0”).
YES
Airflow around the drive is restricted.
• Provide proper installation space around the drive as indicated in the manual. Refer to
Correct Installation Orientation on page 27.
• Allow for the specified space and ensure that there is sufficient circulation around the
control panel.
YES
• Check for dust or foreign materials clogging cooling fan.
• Clear debris caught in the fan that restricts air circulation.
YES
LED Operator Display Minor Fault Name
oL3
Overtorque 1
Drive output current was greater than L6-02 for longer than the time set in L6-03.
6.5 Alarm Detection
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
141
6
Troubleshooting
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