Error Codes and Solutions
*UP 1: Undervoltage trip (main circuit)
- Input voltage (main circuit) is insufficient while running.
- Momentary power failure exceeding the undervoltage detection time UPtUPt occurred.

    Solutions:
- Check the input voltage.
- Set the regeneration power ride-through control ULFULF, auto-restart Pr.StPr.St, and undervoltage detection time UPtUPt.

*Ot: Overtorque trip
- Load torque reached overtorque detection level while running.

    Solutions:
- Decrease load fluctuations.

EF 1, EF 2: Ground fault trip
- Ground fault in output cable or motor.

    Solutions:
- Check the grounding wires, etc.

Et n: Auto-tuning error
- Is a motor that is 2 or more ranks smaller than the inverter capacity being used?
- Are extremely small inverter output cables being used?
- Is the motor rotating?
- Is a device other than a 3-phase induction motor connected?

Et yP: Inverter typeform error
- Has the control PCB been replaced? (Or the main circuit/drive PCB)

    Solutions:
- If replaced, check the inverter typeform with Pr.UtPr.Ut Pr.nPr.n and compare with the typeform table on page 132. If the typeform is the same, set Pr.UtPr.Ut yPdyPd to 7 to clear the error.
- If not replaced, repair is required.

Informational Messages (Messages that do not indicate trips)
 
OFF  S1 terminal not activated  The S1-CC connection is open.  Close ST-CC.
POFF  Control circuit undervoltage  The voltage between the control power terminals R0 and S0 is insufficient.  Measure the control power voltage. Unit repair is required if correct.
NOFF  Main circuit undervoltage  The voltage between the main circuit power terminals R, S, and T is insufficient.  Measure the main circuit power voltage. Unit repair is required if correct.
r t-9  Displayed during retry  Retry is being executed.  If the inverter starts again after a few seconds, there is no problem.
Err 1  Frequency point setting fault alarm  The settings of frequency reference points P1P1 and P2P2 are too close.  Set P1P1 and P2P2 further apart.
Clr  "Clear acceptance possible" display  This display will appear if RESETRESET is pressed after a trip display.  Press RESETRESET again, and the unit will be reset.
EOFF  "Emergency stop acceptance possible" display  Stop has been executed from the panel during automatic or remote operation.  The motor will emergency stop if STOPSTOP is pressed again. To cancel, press another key.
C t-r L  "Operating panel coast-stop acceptance possible" display  The inverter is in the coast-stop input standby state.  Stop with the STOPSTOP key or press another key to cancel.

Informational Messages (Messages that do not indicate trips)

HI LO  Setting value limit warnings Error display and data are alternately displayed twice  A setting value limit has been reached.  Check that the desired setting value is correct.
db, dbon  DC injection braking display  DC injection braking is being executed.  If the display goes out after a few seconds, there is no problem.
    Motor shaft stationary control is being executed.  If the display goes out with the stop command, there is no problem.
Err  Password No. error  The password No. entered is incorrect.  Input the correct password No.
E1  Too many digits attempted to be displayed  The No. of digits attempted to be displayed on the panel, such as for frequency, exceeds four digits.  Decrease the dSFdSF (frequency multiplication factor) setting.

Alarm Codes and Behavior

L  Overload alarm  Same as OL in and OL nt
P  Overvoltage alarm  Same as OP 1 ~ OP 3
C  Overcurrent alarm  Same as OC 1 ~ OC 3
H  Overheat alarm  Same as OH
Simultaneous Alarm Display Behavior

If multiple alarms from the above set occur simultaneously, the display will behave as follows:

    LC
    PC
    CH
    LPC
    ...
    LPCH

L, P, C, H will be sequentially displayed from the left.

+ Toshiba VF-A5 User Manual  >>

+ VF-A5 Fault codes 1 >>

+ VF-A5 Fault codes 2 >>

+ VF-A5 Fault codes 3 >>

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