Fault/Alarm Display Methods And Display Contents; Method For Resetting Fault Cause/Current, Alarm, Maximum Value, Electric Energy; And Reactive Energy - Mitsubishi Electric NF400-SEW Instruction Manual

9.4 Fault/Alarm display methods and display contents

・ Select TRIP/AL in the main menu screen and press ENTER to switch to the fault/alarm display screen.
・ The screen switches between the fault cause/current display screen and the alarm display screen with UP/DOWN.
[Main menu screen]
ENTER
M
A I N
M E T E R
RETURN
P R O T E C T
T R I P / A L
R E S E T
S E T T I N G
When an alarm occurs
"●" is displayed.
・ The screen automatically switches and information is displayed in the fault cause/current display screen when a fault occurs, and in the
alarm display screen when an alarm occurs. In addition, the backlight is lit in red.
・ The illumination of the backlight goes back to white when any of the operation buttons is pressed, and the display screen also goes back to
the previous screen that was being displayed before the alarm display screen was displayed.
(An alarm that has been output keeps remaining in the alarm output status until it is reset.)
・ The illumination of the backlight goes back to white if the cause of the alarm is removed when the alarm reset method is set to auto reset, and
the display screen also goes back to the previous screen that was being displayed before the alarm display screen was displayed.
(The output alarm is also reset.)

9.5 Method for resetting fault cause/current, alarm, maximum value, electric energy,

and reactive energy

・ Select RESET in the main menu screen and press ENTER to switch to the reset screen.
・ The options switch as follows: TRIP ⇔ ALARM ⇔ ALL ⇔ EP (Wh) ⇔ EQ (varh) ⇔ TRIP....
・ Select the item that you wish to reset, and apply the selection with ENTER.
・ Select YES in the allow changes screen and execute the reset with ENTER.
[Main menu screen]
ENTER
M
A I N
M E T E R RETURN
P R O T E C T
T R I P / A L
R E S E T
S E T T I N G
Select with
UP/DOWN
[Fault cause/current
display screen]
T
R I P
[ A ]
Fault cause
I N S T
Overload/short-circuit trip
11328
LTD : Long time delay trip
STD : Short time delay trip
INST : Instantaneous trip
Fault current
DOWN UP
[Alarm display screen]
● PAL
A
L A R M
● OVER
P A L
● NLA
- - -
● O V E R
● IDMAL : Electric current demand alarm (enabled when communication, display is ON;
- - -
- - -
● ILAL
N L A
I D M A L
I L A L
I U B A L
● IUBAL : Electric current unbalance alarm (enabled when communication, display is ON;
- - -
[Reset screen] [Allow changes screen]
ENTER
R
E S E T
T R I P
RETURN
A L A R M
A L L
E P ( W h )
E Q ( v a r h )
[Fault cause/current
display screen]
Without fault history
T
R I P
: Load current pre-alarm
: Overcurrent alarm
: Neutral line open phase alarm (enabled when phase wire type is
displayed as --- if OFF)
" "
: Electric current open phase alarm (enabled when communication, display is
ON; displayed as " --- " if OFF)
displayed as --- if OFF)
" "
ENTER
R
E S E T
To [Phase switching display screen]
O K ?
● TRIP
● ALARM : Resets an alarm
● ALL
N O
Y E S
● EP (Wh) : Reset electric energy (to 0 kWh)
● EQ (varh) : Reset reactive energy (to 0 kvarh)
39
[ - ]
: Resets a fault cause/current
: Reset load current, line voltage, electric power,
reactive power, power factor, harmonic current,
occurrence time of maximum/minimum
harmonic current content values
Electric energy, reactive energy, fault
cause/current, and alarms are not reset
" 1P3W " )