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Hitachi NEXT Series Instruction Manual page 20

Oil-free rotary screw air compressor
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3. OPERATING PROCEDURE [How to Use the Liquid Crystal Display (LCD)]
■ Messages of Automatic Stop Display
When the air compressor stops automatically, the AUTO START light glows or blinks and RESTART display
appears. After the air compressor restarts, monitoring display appears again.
18
● SCHEDULED STOP: Schedule operation setting
<AUTO light glows>
This indicates that the air compressor has been
automatically stopped by a pre-set time.
The air compressor starts automatically when the
pre-set restart time comes.
● LEAD/LAG OPERATION STOP (option)
<AUTO light glows>
This indicates that the air compressor is waiting for
star ting as a slave unit in a two-unit-alternate
operation or a backup operation.
● DRYER PRESTARTED (Built-in dryer model)
<AUTO light blinks>
This indicates that the dr yer has started and air
compressor is waiting for the start. The RESTART
WAIT field shows an expected waiting period until
the air compressor can start in seconds.
● AUTO OPERATION
<AUTO light glows>
This indicates that the air compressor in AUTO
operation has stopped due to the low air demand and
is waiting for restarting when demand is needed.
The RESTAR T WAIT field shows an expected
waiting period until the air compressor can restart in
seconds.
● INSTANT STOP / RETRY (Retry is for only Vtype)
<AUTO light blinks>
For both fixed speed and Vtype, this indicates that
the air compressor has stopped due to an
instantaneous power inter r uption (IPI).
RESTART WAIT field shows an expected waiting
period until the air compressor can restar t in
seconds.
For Vtype, this indicates that the air compressor has
stopped due to the variable speed drive failure and is
waiting for restart as well. The RESTART WAIT
field shows an expected waiting period until the air
compressor can restart in second.
The

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