Hitachi SJ Series User Manual page 628

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