Cause: Component itself is defect.
Remedy: Replace ISPM (in case of E 11) or I/O board board (in case of E 12).
(9) External Trip (E 12)
Phenomena: Trip due to have inputted an external signal to “EXT” input terminal of the
frequency inverter.
Cause: Faulty external device or equipment gives frequency inverter a trip requirement
when external trip function (EXT) is selected.
Remedy: Evaluate external device or equipment which is connected to frequency inverter.
Way to Reset: A
(10) USP error (E 13)
Phenomena: Unexpected Start Protection. This error can occur when “USP” function is
selected.
Cause: Frequency inverter trips when it is powered up with RUN command is given.
Remedy: Disable RUN command when power up the frequency inverter. Or disable USP
function if possible to the system.
Way to Reset: A or set RUN command off (stop)
(11) Ground fault error (E 14)
Phenomena: Earth contact in the motor or the motor cable or in the IGBT. Frequency inverter
detects this earth contact only at power up.
To resolve the causes , please power off and disconnect the motor wire at INV (UVW)terminal.
Cause: Earth contact in the motor or the motor cable.
Remedy: Check the impedance between output portion(wire and motor) and earth.
Cause: Detection circuit/IGBT of the inverter is defect. If the motor and the motor cable is
disconnected from the frequency inverter, the ground fault should not be detected
anymore.
Remedy: Please disconnect the motor and the motor cable.
If E14 comes out at power on, please replace the unit.
Way to Reset: Don’t reset.
(12) Over voltage at source (E 15)
Phenomena: High voltage at power source line. Frequency inverter cannot protect source over
voltage. If it is too high, frequency inverter will be damaged.
Cause: Source voltage is too high.
Remedy: Check the source voltage continously.
Insert AC reactor at source lines.
Way to Reset: A
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