Hitachi NES1-004SB Quick Reference Manual page 198

Chapter 9 Error Codes
[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.
Trip history 1 (Latest)
    
ESC
    


    
.

     

     

    

    
Note2: During undervoltage, detailed information of the trip (historical trail) is not stored.
Trip history 6
    
t o
SET
.
Error code

Output frequency

.
Output current

.
DC bus voltage

Elapsed RUN time

Elapsed power-
ON time

Trip cause
.
Power up or initial processing
.
Stop
.
Deceleration
.
Constant speed
.
Acceleration
.
0Hz command and RUN
.
Starting
.
DB; DC braking
.
Overload restriction
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.
9 - 2
    
.
Inverter status
at trip point