Hitachi NES1-002LB, Quick Reference Manual

Page: 198 / 295

Chapter 9 Error Codes
9 - 2
[Digital Operator (NES1-OP, OPE-S/SR/SBK/SRmini)]
Trip History and Inverter Status
We recommend that you first find the cause of the fault before clearing it. When a fault occurs, the inverter
stores important performance data at the moment of the fault. To access the data, use the monitor function
(

xxx) and select

details about the present fault. The previous 5 faults are stored in

to

.
Each error shifts

-

to

-

, and writes the new error to

.
The following Monitor Menu map shows how to access the error codes. When fault(s) exist, you can
review their details by first selecting the proper function:

is the most recent, and

is the oldest.
Note2: During undervoltage, detailed information of the trip (historical trail) is not stored.
     
    
    


SET ESC


Trip history 1 (Latest)
Error code
t o
Trip history 6
    
.
.
    
.




     


    


    
.
Output frequency
Output current
DC bus voltage
Elapsed RUN time
Elapsed power-
ON time
Trip cause
Inverter status
at trip point
.

Note1: The above descriptions indicate the inverter status at the
occurrence of tripping, which may not correspond to the apparent
operation of the motor.
(Example)
When the PID control is used or the frequency command is input
as an analog signal (a voltage or current signal), the inverter may
repeat acceleration and deceleration alternately at short intervals
to make up for the fluctuations of the analog signal, even if the
motor is apparently running at constant speed.
In such cases, the inverter status at tripping may not correspond
to the apparent operation of the motor.
.

.

.

.

.

.

.

.

    
.
Power up or initial processing
Stop
Deceleration
Constant speed
Acceleration
0Hz command and RUN
Starting
DB; DC braking
Overload restriction