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 179.
• 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 34.
• 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
5.5 Alarm Detection
YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
149
5
Troubleshooting
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