UP1 (Undervoltage - main circuit):
+ Input voltage (main circuit) becomes insufficient in operation.
+ Momentary power failure occurs because undervoltage continues longer than undervoltage detection time (#528).
    Countermeasures:
+ Check input voltage.
+ If undervoltage is detected, set regenerative power ride-through control (#301 and #302) and undervoltage detection time (#528) as countermeasures against future momentary power failure.

UP2 (Undervoltage - control circuit):
+ Input voltage (control circuit) becomes insufficient in operation.
+ Momentary power failure occurs because undervoltage continues longer than undervoltage detection time (#528).
    Countermeasures:
+ Check input voltage.
+ If undervoltage is detected, set regenerative power ride-through control (#301 and #302) and undervoltage detection time (#528) as countermeasures against future momentary power failure.

OT (Over-torque):
+ Load torque reaches over-torque detection level in operation.
    Countermeasures:
+ Check the system if there is something abnormal in it or not.

EF1/Ef2 (Ground-fault):
+ Output cable or motor falls into ground-fault.
    Countermeasures:
+ Check units and connections if there is ground-fault or not.

Et n (Auto-tuning error):
+ Check settings of motor parameters (#400 to #414).
+ Motor whose capacity is smaller by two or more ranks than that of inverter is used.
+ Extremely think cable is used as inverter output cable.
+ Motor is running.
+ Motor other than three-phase inductive type is used.
+ If Et n error occurs as power is turned on, set motor type parameter as others (#413 - #414).
    Countermeasures:
+ Check motor settings (#400 - #414).
+ Check motor capacity and compatibility with inverter.
+ Check motor cable.
+ Ensure motor is stopped before auto-tuning.

E tYP (Inverter type error):
+ Is control board (or drive board of main circuit) replaced?
    Countermeasures:
+ When board has been replaced, input code for the new board.

E-10 (Sink/source switching error):
+ Sink/source switch of input/output terminal is set wrong (reversely switched on/off).
    Countermeasures:
+ Check connections and set proper logic.

E-11 (Sequence error):
+ The signal from a system is not inputted into input terminals.
+ The input terminal function (#30 or #31) is not set up.
+ For not using the system-supporting sequence (#530) function, it is set up except 0.0 at (#530).
    Countermeasures:
+ Please check if the sequence is normal or not.
+ Please set (#30 or #31) as the input terminal to use.
+ Please set up 0.0 when you do not use system-supporting sequence.

E-12 (Encoder error):
+ Disconnection of encoder circuit.
    Countermeasures:
+ Check connection of encoder.
+ Connect encoder correctly.

E-13 (Speed error - Over speed):
+ Something abnormal in encoder.
    Countermeasures:
+ Check connection of encoder.
+ Connect encoder correctly.

E-14 (Too much potential deviation):
+ Potential deviation exceeded the (#531) set value during position control.
    Countermeasures:
+ Check connection of encoder.
+ Increase the setting value of (#531).
+ Adjust the parameters on position control.

E-17 (Key error):
+ RUN or STOP key is depressed for 5 seconds or more.
+ Key is faulty.
    Countermeasures:
+ Check operation panel.

E-18 (VI/II input error):
+ Breaking down of a wire for VI/II input signal.
    Countermeasures:
+ Check VI/II input signal.

nrON (Low-current operation):
+ Output current declined to the low-current detection level during operation.
    Countermeasures:
+ Check to see if low-current detection level is set properly to the system or not (#5 and #1).

OFF (ST-CC opened):
+ ST terminal is in open-circuit.
    Countermeasures:
+ Close ST-CC circuit.

P.OFF (Control circuit undervoltage):
+ Undervoltage between RO and SO of control power supply (when option is used for 22 kW or lower type).
    Countermeasures:
+ Measure supply voltage of control power. If voltage is normal, it needs repair service.

nOFF (Main circuit undervoltage):
+ Undervoltage between R, S and T of main circuit power supply.
+ Trouble of pre-charge circuit or DC circuit fuse.
    Countermeasures:
+ Measure supply voltage of main circuit power. If voltage is normal, it needs repair service.

rt rY (Retry indication):
+ In retry operation.
+ Momentary power failure is occurred.
    Countermeasures:
+ If inverter automatically restarts dozens of seconds later, it is normal. Be careful of inverter in retry status, because there is a fear that it may suddenly restart.

P-ER (Frequency point setting error alarm):
+ Points 1 and 2 of frequency setting signal are set too close to each other.
    Countermeasures:
+ Set points 1 and 2 of frequency setting signal apart from each other.

CLr (Clear enabling indication):
+ If STOP key is pressed after trip indication, this indication appears.
    Countermeasures:
+ Press STOP key once more for resetting.

EOFF (Emergency stop enabling indication):
+ Stop operation is performed by panel during automatic or remote operation.
    Countermeasures:
+ If STOP key is pressed, emergency stop is executed. To cancel emergency stop, press any other key.

HI/LO (Alarm for setup value error):
+ Setup value error is detected in reading out or writing data.
    Countermeasures:
+ Check setup value for input error.

d.b (DC braking indication):
+ Under DC braking.
    Countermeasures:
+ If message disappears dozens of seconds later, it is normal.

E1/E2 (Panel indication overflow):
+ Number to be shown on panel such as frequency and so on overflows figures of display. (Number of overflowing digits is indicated.)
    Countermeasures:
+ For indication of frequency, set multiplying rate (#2) lower. (Parameter setting that results in overflow is of course valid.)

t (Communication error):
+ Various transmission errors occur when computer is linked up with inverter system.
+ Various transmission errors occur in inverter to inverter communication (slave side).
+ Time-out or trip in master side.
    Countermeasures:
+ For countermeasures against various transmission errors, refer to the "Manual for communication".
+ Check the master inverter.

Init (Parameter is under initialization):
+ Parameters are initialized to be standard default values.
    Countermeasures:
+ If message disappears dozens of seconds later, it is normal.

Atn (In auto-tuning):
+ Under auto-tuning.
    Countermeasures:
+ If message disappears several seconds later, it is normal.


Messages and Their Meanings: No Trip Developed

Indication: OFF

Contents: ST-CCC opened

- Terminal is open-circuit.
- ST terminal is in open-circuit and one of control power supply voltages is too low for 22 kW model or lower.

Countermeasures:

- Close ST-CCC circuit.
- Measure supply voltage of main circuit.

Indication: PGOFF

Contents: Control circuit undervoltage

- Measure supply voltage of control power supply. If voltage is normal, it resets later.

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