Hitachi SJ Series, User Manual

Page: 628 / 786

18-35
Chapter 18
Tips/FAQ/Troubleshooting

Icon 2 NRDY monitor
• The NRDY icon is shown on the display.
• When NRDY is shown, the inverter is in the
following condition(s).
• You can see the status of NRDY by pressing UP
key on the three-lined monitor or on [dC-40].
Q A
Occurrence

Estimated cause(s)

Exemplar measures to be taken
TRIP display was
shown and [dC-40]
NRDY was set to
01.
• There was an error factor, which caused the
inverter to trip.
• Remove the error factor.
Consult this chapter.
The CTRL icon was
shown and [dC-40]
NRDY was set to
02.
• The control power supply (R0, T0) has been
input, whereas the main circuit power supply
R-S-
T hasn’t been input.
• Check the input of main circuit power
supply and examine the breaker, wiring,
and so on.
The 24V icon was
shown and [dC-40]
NRDY was set to
02.
• Only 24V has been input to the backup power
supply P+-P-.
• Check the input of main circuit power
supply and the control power supply, and
examine the breaker, wiring, and so on.
[dC-40] NRDY was
set to 03.
• [RS] terminal is ON and the inverter is under reset
operation.
• Check the wiring and operation state of
[RS] terminal.
[dC-40] NRDY was
set to 04.
• The STO circuit is turned OFF or broken.
• Check ST1/ST2 terminals.
[dC-40] NRDY was
set to 05.
• The inverter is checking the internal circuit,
operator keypad, options, etc.
• If this error is not released, check the
operator keypad for contact failure or other
problem.
[dC-40] NRDY was
set to 06.
• There is an inconsistency in the setting
• Although [AA121] is set to 10 (Vector
control with sensor), the option P1-FB is
not attached.
• Refer to 18.5.2 “Checking setting
inconsistencies”.
[dC-40] NRDY was
set to 07.
• There is a sequence operation problem in the
brake control.
• Check the setting and signal operation of
[AF130] brake control or the similar
parameter.
[dC-40] NRDY was
set to 08.
• [FRS] terminal or [CS] terminal was turned ON.
• [FRS] or [CS] command was entered from the
communication.
• Check the signal operation of input
terminal for [FRS] or [CS].
[dC-40] NRDY was
set to 09.
• Operation command isn’t permitted.
• The [REN] terminal has been assigned
and is turned OFF.
• Forced stop is being issued. (Deceleration stop
behavior)
• STOP key was pressed when commands
had been entered from a source other
than the operation keypad.