Indication Of The Error - Hitachi NES1-004SB Quick Reference Manual

9.1 Indication of the error

The microprocessor in the inverter detects a variety of fault
conditions and captures the event, recording it in a history table. The
inverter output turns OFF, or "trips" similar to the way a circuit
breaker trips due to an over-current condition. Most faults occur
when the motor is running (refer to the diagram to the right).
However, the inverter could have an internal fault and trip in Stop
Mode.
In either case, you can clear the fault by pressing the Reset
key/terminal except some errors.
* How to remove the error condition
a) Pressing the [RUN/STOP/RESET] key. ([STOP/RESET] key in the operator.)
b) Intelligent input terminal is assigned reset(18:RS). And to operate the terminal.
c) A power cycle of the inverter.
Note) Error by a factor may not be canceled by a reset a),b). In this case, please go to c).
[Standard panel]
The ALM (red) of the main body, LED indication of RUN (yellowish green) display it like a list shown below
at the time of error outbreak.
Error contents
Over-current event
Over-voltage Note2)
Under-voltage Note3)
Over load
Major failure Note1)
Others Note4)
Note1) The Major fault : When a Memory error, Current detection error, CPU error, Ground fault
, Thermal detection error
Note2) The blinking is a period for 1s. The condition of the blinking is blinking in Timing same as ALARM lamp,
the RUN lamp.( At the time of the lighting, ALARM lamp, the RUN lamp turn on, too. At the time of lights
out, be turned off the light by an ALARM lamp, RUN lamps.)
Note3) The blinking is a period for 1s. As for the condition of the blinking, ALARM lamp and RUN lamp repeat a
flash in turn.( At the time of the ALARM lamp lighting, RUN lamp turns off the light. At the time of ALARM
lamp lights out, RUN lamp turns on.)
Note4) As for other trips,Over-voltage protection,Inverter thermal detection system error,Driver error,Output
single-phase error,Over-current event during low-speed,Operetor connection error(except NES1-OP),
either of Modbus communication error .
LED Lighting, Blinking
ALM LED
Lighting
Blinking : Same period
Blinking : Alternation
Lighting
Lighting
Blinking
9 - 1
Chapter 9 Error Codes
RUN
STOP
STOP
RESET
Trip
Fault
RUN LED
Blinking
Blinking : Same period
Blinking : Alternation
Lighting
Lights out
Lights out
RUN
Fault