Hitachi NEXT Series Instruction Manual page 20

3. OPERATION 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.
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● 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
starting as a slave unit in a two-unit-alternate operation
or a backup operation.
● DRYER PRESTARTED (Built-in dryer type)
<AUTO light blinks>
This indicates that the dryer 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
RESTART 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 interruption (IPI). The RESTART WAIT field
shows an expected waiting period until the air
compressor can restart 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.