Indication: NOFF

Contents: Main circuit undervoltage
- Undervoltage between R, S, and T.
- If a momentary power supply failure occurs, no trip is developed.

- Measure supply voltage of main circuit. If voltage is normal, it resets later.
- If momentary power failure occurs, retry operation activates automatically.

Indication: rdy

Contents: Retry indication
Expected Causes:
- Panel indication of retry operation for momentary power failure is occurred.

- Measure supply voltage of main circuit. If voltage is normal, it resets later.
- If momentary power failure occurs, retry operation activates automatically.

Indication: P-E

Contents: Frequency point setting error
Expected Causes:
- 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.

Indication: C1-C

Contents: Clear enabling indication
Expected Causes:
- STOP key is pressed after trip indication.

Countermeasures:
- Press STOP key once more for resetting.

Indication: EOFF

Contents: Emergency stop enabling indication
Expected Causes:
- Clear operation is performed by panel during automatic or remote operation.

Countermeasures:

- If STOP key is pressed, emergency stop is released. To cancel emergency stop, press any other key.

Indication: H1 - H0

Contents: Parameter in memory being edited alternately displayed twice
Expected Causes:
- Under DC braking
- Under motor shaft fixing control
- Input error

Countermeasures:

- Check setup value for input error.

Indication: db

Contents: DC braking indication
Expected Causes:
- Under DC braking
- Under motor shaft fixing control

Countermeasures:

- If message disappears dozens of seconds later, it is normal. (Note that this is not a fault indication.)

Indication: E2

Contents: Panel Indication overflow
Expected Causes:
- Number to be shown on panel exceeds six figures which can be shown by inverter. Last number of overflowing digits is indicated alternately with a decimal point.

Countermeasures:

- If message disappears dozens of seconds later, it is normal. (Note that this is not a fault indication.)

Indication: E-C

Contents: Communication error
Expected Causes:
- When control unit is linked with inverter via communication, communication error is indicated if reading data and writing data are interrupted.

Countermeasures:

- For continuous transmission errors, refer to various communication errors.

Indication: L

Contents: Parameter is initialized, setting value is reset to standard default values
Expected Causes:
- Parameter initialization is executed.

Countermeasures:

- If message disappears several seconds later, it is normal.

Indication: In

Contents: In auto-tuning
Expected Causes:
- Auto-tuning is executed.

Countermeasures:

- If message disappears several seconds later, it is normal.

Pre-alarm display
Indication    Contents    Expected Causes and Countermeasures
O    Overcurrent alarm    Same as OC
P    Overvoltage alarm    Same as OP
F    Overload alarm    Same as OL
r    Overheating alarm    Same as OH

Note: When two or more alarms occur at the same time, such the message as shown in the following blinks. Blinking indications appear in the order of OC, OP, OL, OH from the leftmost place to right.

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