Hitachi HISCREW 2000 Series - Page 16

14
3. HOW TO OPERATE [Setting of the Control Functions]
When the power is instantaneously interrupted and then
uninterrupted, the air compressor and the air dryer start
simultaneously.
IMPORTANT
When you use an external automatic control
panel
(multiple-unit controller, two-unit controller, etc.) :
・ Set the DIP switch SW2 No.1 & 2 to ON & ON
respectively (to enable the manual mode), and
the DIP switch SW1 No.1 to OFF (to disable
the air dryer prestart function).
Thus you can protect the air dryer from stopping
and restating frequently.
CAUTION
3.4.4 Setting of Air Dryer
(1) Operation Modes
As listed in the table left, the models with a built-in
air dryer provide 3 operation modes. You can select
either one of them by setting the No. 1 & 2 pins of the
DIP switch SW2 located on the printed circuit board.
If you want to enable an air dryer prestart function,
always select the automatic mode.
If you want to start and stop the built-in air dryer with
the DRYER button, always select the manual mode.
The settings are saved in the memory when you have
stopped the A.
(2) Air Dryer Prestarting
To enable the air dryer prestart function, set:
DIP switch SW2 No.1 & 2 to ON & OFF respec-
tively, and
DIP switch SW1 No.1 to ON.
When you press the START button under the air dryer
prestart function,
・ The START light and DRYER light become on (non-
flashing),
・ The AUTO START light becomes on (flashing), and
・ The air dryer prestarts.
Three minutes later,
・ The AUTO START light becomes off, and
・ The air compressor automatically starts.
This chills the built-in air dryer sufficiently in advance,
and thus enables to discharge the dry compressed air
from the beginning.
NOTE: The shaded cells indicate a standard factory setting.
This page describes for the models with a
built-in air dryer.
No.1 OFF OFF ON ON
No.2 OFF ON OFF ON
–
Independent Automatic Manual
DRYER Light OFF
Without
Built-in
Air Dryer
With Built-in Air Dryer
DIP Switch
SW2
Air Dryer
Operation Mode
(by connecting
& disconnect-
ing the power)
(by START
and STOP
buttons)
(by DRYER
button)
ON (non-flashing) for normal operation
ON (flashing) for abnormal operation
A Models
16
CN16
51
CN17
41
CN8
21
CN2
19
CN1
17
CN15
17
Y3 Y1Y1
CPU
Y52C
Y2D
Y52
CN13
13
CN3
15
CN5
17
CN4
17
CN6
15
CN14
41
Y42
Y6
C38
C4D
C39
ICO
GND
CN11 CN12
14
CN18
13
CN19
13
CN22
14
CN21
15 12
CN10
1
18
2
CN9
SW1
14
SW2
CN7
HC30CPU−
SW1
ON
OFF
DIPSwitch
③
12
2
AirDryerAlarming
AirDryerShutdown
OperationMode
(indicatestheautomaticmode
.)
ON
OFF
AirDryerPrestarting
SW2
14
ON
OFF
DIPSwitch
PrintedCircuitBoard
②
④
①
Power
Supply
(3) Air Dryer Warning (Shutdown/Alarm)
To enable the air dryer warning function, set the DIP
switch SW1 No.2 to:
ON for an alarm, and
OFF for a shutdown.
When the air dryer fails,
・ The SHUTDOWN or ALARM light becomes on
(flashing),
・ The DRYER light begins flashing, and
・ The digital monitor displays the shutdown or alarm
code.
When the SHUTDOWN light flashes, the air compres-
sor is automatically shut down. When the ALARM light
flashes, the air compressor is not shut down but keeps
operating. In either case, usually, the air dryer is shut
down.
(4) Setting Procedure
When setting the DIP switches SW1 and SW2:
q Disconnect the power.
w Detach the door (for the 22 kW models) or the front
enclosure panel (for the 37 kW models), and then
remove the starter/control box cover.
e Set the DIP switches SW1 and SW2 as required.
r Return the door or front enclosure panel and the
starter/control box cover to their original places.