KITO Harrington RY Series, Owner'S Manual

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Table 7-7 "Minor Failure/ Warning Error" Display Details and Remedies (Continued)
LED Display Error name
Uv3
In-rush prevention circuit error
Failure of the in-rush prevention circuit occurred.
Cause Measure
Failure of the contactor of the in-rush
prevention circuit inside the VFD
Turn on/off the power supply to check if an error occurs.
⇒
If the error
occurs in succession, replace the VFD.
VFD internal atmosphere error Check the ambient temperature of the VFD.
Table 7-8 "Minor Failure/ Warning" Display Details and Remedies
LED display Minor failure name
EF
Forward/reverse command simultaneous input
The forward rotation command and reverse rotation command were
inputted simultaneously for 0.5 seconds or more.
Cause Measure
Sequence error Review and modify the wiring of the forward/reverse command.
LED display Minor failure name
to EF1 to EF7
External error (Input terminal S1 to S7)
An external error was inputted from the multifunction contact input
terminal (S1 to S7)
Cause Measure
The alarm function of the external
equipment is operating.
-Remove the cause of the external error input of the multifunction input.
The wiring is not correct.
Check that the signal line is correctly connected to the external input
terminal.
-Connect the signal line correctly.
LED Display Minor failure name
Hbb
Safety signal is being inputted.
A safety signal was inputted from the input terminal.
Cause Measure
-If not reset by releasing the emergency stop button, check the wiring
related to the push button switches (signal line).
LED Display Minor failure name
HCA
Current warning
The VFD output current exceeded the overcurrent warning level (150% of
the rated current).
Cause Measure
The load is too high.
Measure the current flowing through the motor.
⇒
If overload occurs, reduce the load, or increase the inverter (VFD)
capacity.