Hitachi DSP-160W6N, DSP-200W6N, DSP-240W6N, DSP-160V6WN, DSP-240V6WN Instruction Manual

INSTRUCTION MANUAL

HITACHI Oil-Free Rotary Screw Air Compressor

NEXTseries

Water-Cooled

Fixed Speed

DSP-132W6N
DSP-145W6N
DSP-160W6N
DSP-200W6N
DSP-240W6N

Water-Cooled

Variable Speed Drive Control

DSP-160V6WN
DSP-240V6WN

TWO STAGE

●This INSTRUCTION MANUAL explains in detail

the important items that require attention;
observed as the following:
Always observe notations of WARNING, CAUTION

●

and IMPORTANT, as they indicate considerable
risks to safety.

Prior to operation of this air compressor,
ensure that all operators read and
understand this INSTRUCTION MANUAL
completely, thereby operating it safely
and properly.

Place the INSTRUCTION MANUAL near
the air compressor to make it available
at any time, and refer to it as the need
arises.

GRAPHIC DESCRIPTIONS:

WARNING

CAUTION

IMPORTANT

：This is a warning. If handled improp-

erly, death or severe injury could
result.

：This is a caution. If handled improp-

erly, injury and/or physical damage
could result.

：This graphic is Variable Speed-control

Drive (VSD) models.

：This graphic is for items that need

attention, other than WARNING and
CAUTION.

：

This graphic is a page number reference.

How to Use This Instruction Manual

● This Instruction Manual covers the standard models of the Hitachi DSP air compressor.

● This Instruction Manual intended to assist daily operators and maintenance personnel

in the installation, operation, control and service of the Hitachi DSP air compressor.

● Prior to operation of this air compressor, ensure that all operators read and understand

this INSTRUCTION MANUAL completely, thereby operating it safely and properly.

Place the INSTRUTION MANUAL near the air compressor to make it available at any

time, and refer to it as the need arises.

● If there are any questions or comments, please contact the local Hitachi distributor or

the nearest Hitachi office.

Fill your DSP’s model name, Serial Number, etc. into the back cover of this Instruction Manual.

●

Such information may be helpful when ordering parts, periodic maintenance, and overhaul.

WARNING

Never remove a protective device from the air compressor or modi­fy the air compressor.

It is imperative to install an earth leakage (ground) circuit breaker
on the power cable. This prevents a ground fault accident.

DSP air compressors are not designed, intended or approved for
breathing air applications. Hitachi does not approve specialized
equipment for breathing air applications and assumes no responsi­bility or liability for compressors used for breathing air services.

■ Model Number Nomenclature

DSP-160VW6N

Dry or Oil-Free Rotary

Screw Air Compressor

Packaged

● Hitachi may make improvements and/or changes in the products described in this publication at any time without notice.

N-Type (NEXT Series)

Frequency (6: 60 Hz)

W: Water-Cooled

w/ V: VSD, w/o V: Fixed

Motor Output (kW)

Contents

1. SAFETY  ………………………………………………………………………………………… 2

2.

GENERAL DESCRIPTION

 2.2 Components …………………………………………………………………… 5

2.3 Daily Operating Components ………………………………………………… 7

2.1 Appearance

………………………………………………………………………

4

3. OPERATING THE DSP 3.1 Instrument Panel………………………………………………………………… 10

3.2 Start/Stop Operation …………………………………………………………… 12

3.3 How to Use the liquid Crystal Display (LCD)………………………………… 13

3.4 How to Use the Digital Monitor ……………………………………………… 23

3.5 Daily Operation ………………………………………………………………… 30

3.6 Oil Mist Remover Daily Operation…………………………………………… 32

3.7 Adjusting the DSP ……………………………………………………………… 32

4. TROUBLESHOOTING 4.1 Protective Devices ……………………………………………………………… 33

4.2 Troubleshooting the Air Compressor………………………………………… 35

4.3 Troubleshooting the Oil Mist Remover……………………………………… 36

5. INSTALLING 5.1 Unpacking the DSP Air Compressor ………………………………………… 37
 AND PIPING THE DSP 5.2 Conveying the DSP Air Compressor ………………………………………… 37

5.3 Installing the DSP Air Compressor  ………………………………………… 38

5.4 Piping the DSP Air Compressor ……………………………………………… 39

5.5 Ventilation of Air Compressor Room………………………………………… 43

6. STARTUP OPERATION 6.1 Air Compressor ………………………………………………………………… 44

6.2 Oil Mist Remover ……………………………………………………………… 46

7. WIRING 7.1 Power Supply Transformer and Power Cable ……………………………… 47

7.2 MIV and WIVM wiring ………………………………………………………… 47

7.3 Connecting a Power Cable …………………………………………………… 47

7.4 Wiring Connection Diagram…………………………………………………… 50

7.5 Control Panel /LCD monitor Specifications ………………………………… 50

8.

STANDARD COMPONENTS

  

AND SUBSYSTEMS

8.3 Cooling Water…………………………………………………………………… 61

8.4 Capacity Control System ……………………………………………………… 62

8.5 Outline of Oil Mist Remover Subsystem …………………………………… 66

9.

MAINTAINING THE DSP

9.2 Standard Maintenance Schedule …………………………………………… 68

9.3 Oil Mist Remover Maintenance ……………………………………………… 72

9.4 How to Service the DSP Air Compressor…………………………………… 73

10.

PRECAUTIONS WHEN THE COMPRESSOR IS TO BE IDLE FOR AN EXTENDED PERIOD OF TIME

8.1 Standard Components ………………………………………………………… 57

8.2 Air/Oil Flow ……………………………………………………………………… 58

9.1 Air Compressor Maintenance………………………………………………… 67

…………… 84

11. PARTS LIST  ………………………………………………………………………………………… 85

12. WARRANTY, AFTER-SALES AND SERVICE  …………………………………………………………… 103

13. OPERATION RECORD LOGBOOK…………………………………………………………………………… 104

14. STANDARD SPECIFICATIONS ……………………………………………………………………………… 105

1

1. SAFETY

To ensure safe and proper operation of the air compressor, it is indispensable to carefully
read and understand the following warnings and instructions detailed below. These warn­ings and instructions are attached to the air compressor as shown in the figure below.

WARNING

WARNING

Rotating Parts!

●Keep hands and rods, etc. away from

the rotating parts (Cooling fans, etc.)

●Use caution at all times, when air com-

pressor is powered. The air compres­sor may be capable of restarting with­out hitting the START button.

●When the air compressor is operating,

do not remove or open the enclosure
panels and doors.

●Before servicing the air compressor,

stop it, disconnect the power, especially
when accessing any rotating parts.

WARNING

Hot Surface!

●Do not directly touch any component

inside the air compressor enclosure
when the air compressor is operating
or immediately after it has stopped,
as the components are extremely hot
and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then
wait for the air compressor to cool
down.

Electric Shock Hazard!

●Before servicing or wiring the

air compressor, disconnect
the power. This will prevent
anyone from turning on the
power and causing an elec­tric shock that could lead to
severe injury or death.

●Do not allow any unlicensed

person to wire the air compres­sor. Always use a licensed
electrician.

●Ground the air compressor.

Intercooler Header

Discharge Air pipe

Discharge Air pipe

Heated!!

Air End

Heated!!

WARNING

Hot Surface!

●Do not directly touch any component

inside the air compressor enclosure
when the air compressor is operating
or immediately after it has stopped,
as the components are extremely hot
and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then
wait for the air compressor to cool
down.

Aftercooler Header

Air End

WARNING

Electric Shock Hazard!

●Before servicing or wiring the

air compressor, disconnect
the power. This will prevent
anyone from turning on the
power and causing an elec­tric shock that could lead to
severe injury or death.

●Do not allow any unlicensed

person to wire the air compres­sor. Always use a licensed
electrician.

●Ground the air compressor.

2

WARNING WARNING

1. SAFETY

Do Not Breathe Air!

Discharge air can contain Carbon Monoxide and
other contaminants. Breathing the air can cause
severe injury or death.

WARNING

Electric Shock Hazard!

●

Before servicing or wiring the air compressor,
disconnect the power. This will prevent anyone
from turning on the power and causing an electric
shock that could lead to severe injury or death.

●

Do not allow any unlicensed person to wire the air
compressor. Always use a licensed electrician.

●Ground the air compressor.

CAUTION

●

High pressure air can cause severe injury or death.
Be careful when air compressor is operating.

 Pressurized air can blow out of safety relief valves

and etc. at incredibly high velocities.

●When using compressed air to clean equipment,

use extreme caution and/or wear eye protection.

●Before servicing the air compressor, stop it,

disconnect the power, and relieve pressure before
removing filter, plug, fitting or cover.

WARNING

High Pressure Air!

Hot Surface!

●Do not directly touch the air end, discharge air

pipe,and coolers when the air compressor is
operating and immediately after it has stopped,
because these parts are heated then.

Before servicing the air compressor (especially

●

when accessing to the heated parts), stop it, discon­nect the power, and wait until it is cooled down.

WARNING

●

Preoaution against Fire!

Keep any other hazardous materials such as
flammable solvents away from the air compressor.
Also do not use fire nearby it; otherwise a spark
may enter the air compressor and burn it internally.

●Do not remove any protective relayʼ s. Also do

not make a modification of the control circuit that
may result in impairing the protective relayʼ s
function. Remember that the loss of the protective
relayʼ s function may cause serious damage.

●Install an earth leakage circuit breaker between

the air compressor and the power supply. Do not
use a disconnector such as a knife switch
because it cannot protect the air compressor and
may cause burnout of the air end if a ground fault
has occurred.

Rotating Parts!

●Keep hands and rods, etc. away from the rotating

parts (Cooling fans, etc.)

●Use caution at all times, when air compressor is

powered. The air compressor may be capable of
restarting without hitting the START button.

●When the air compressor is operating, do not

remove or open the enclosure panels and doors.

●Before servicing the air compressor, stop it, dis-

connect the power, especially when accessing
any rotating parts.

3

2. GENERAL DESCRIPTION

This section illustrates and describes the major components of the DSP air compressor. Be familiar
with the name, location and function of each component before using the DSP air compressor.

2.1 Appearance

2.1.1 Fixed Speed

[Front View]

Air Exhaust

(Air Compressor Package)

Instrument Panel

See page p. 10, chap­ter 3, for details.

Front Left Door

Open the front left
door only when servic­ing the DSP air com­pressor. Keep it closed
when operating the
DSP air compressor.

Power Supply Port

Check the specifica­tions, power supply
and voltage before
connecting the power
supply.

This panel discharges
the hot air generated
in the air compressor.

Enclosure

Enclosure panels
lower the sound level
of the air compressor
package.

Compressor Name plate

Model designation,
manufacturing number
and specification are
printed.

Plate of Operating /

Servicing Instructions

Read carefully the
plate before operating
and servicing the DSP.

[Rear View]

Compressed Air Discharge

Air Intake

(Inlet to the Air End)

Air Intake

Air Intake

(Air Compressor Package)

Sling Fitting

Use the sling fitting
when moving and
installing the DSP air
compressor.

Air Exhaust

Air Exhaust

Air Exhaust

OMR

See page 55 for the
details

Oil Filling Port

Use the port to fill the
gear case with oil.

Air Intake

Oil Level Gauge

This indicates the
quantity of the oil in
the gear case. Check
the oil level before
starting the DSP and
when operating it.

4

2.1.2 Variable Speed Drive Control

[Front View]

Instrument Panel

See page p. 10, chap­ter 3, for details.

Front Left Door

Open the front left
door only when servic­ing the DSP air com­pressor. Keep it closed
when operating the
DSP air compressor.

Power Supply Port

Check the specifica­tions, power supply
and voltage before
connecting the power
supply.

2. GENERAL DESCRIPTION [Appearance]

Air Exhaust

(Air Compressor Package)

This panel discharges
the hot air generated
in the air compressor.

Enclosure

Enclosure panels
lower the sound level
of the air compressor
package.

Plate of Operating /

Servicing Instructions

Read carefully the
plate before operating
and servicing the DSP.

[Rear View]

Compressed Air Discharge

Air Intake

(Inlet to the Inverter)

Air Intake

Air Intake

(Air Compressor Package)

Sling Fitting

Use the sling fitting
when moving and
installing the DSP air
compressor.

Air Exhaust

Air Exhaust

Air Exhaust

Compressed Air Discharge

OMR

See page 66 for the
details

Oil Filling Port

Use the port to fill the
gear case with oil.

Air Intake

Oil Level Gauge

This indicates the
quantity of the oil in
the gear case. Check
the oil level before
starting the DSP and
when operating it.

5

2. GENERAL DESCRIPTION [Components]

2.2 Components

Discharge Pipe
(Compressed Air Discharge)

Blow-off air cooler

Safety Relief Valve

Aftercooler

Check Valve

2nd-Stage Air end

Air Intake Filter

Oil Mist Remover

Gear Case

Oil Pump

Ventilating Fan

1st-Stage Air end

Intercooler

Enclosure

Intercooler

Starter /
Control Box

Instrument Panel

Main Motor

Common Base

Oil Level Gauge

Oil Filling Port

Oil Filter

Oil Cooler

6

2. GENERAL DESCRIPTION [Daily Operating Components]

2.3 Daily Operating Components

Controls on the Instrument Panel

1 2

● Indicates the operation control section.
  (

For more information, see Chapter 3, on

page 10.)

● Operation ON → POWER light on.

● Start: Press START button → Operation Light on

during operation

● Stop: Press UNLOAD STOP button →

unloading

stops for 5 minutes → Operation Light off during
operation

● Power OFF: → POWER light off

MONITOR

自動

AUTO

モニタ

MONITOR

メニュー

MENU

＋／−

UP/ 
DOWN

設定

SET

運転管理

RUNNINGCONTROL

警報

ALARM

機能

FUNC

リセット

RESET

遠方

記憶

STR

［×10h］

表示切替/

ワイド モード
SELECT/WIDE

1

運転状況

RUNNINGMODE

遠方

REMOTE

負荷

LOAD

故障

SHUTDOWN

2

電源

POWER

起動待ち

AUTOSTART

運転 停止

STOP

STARTREMOTE

UNLOAD STOP

Oil Level Gauge

● Verify that the oil level of the lubricating oil is

between the red lines during operation.

Lubricating oil circulates in the cooler and piping during

  

operation, so the position of the oil level differs when the

compressor is running and when it is off. The level rises

when the compressor stops running.

Oil Filling Port

Lubricating Oil

3 4

Oil: Use genuine Hitachi GL-68 DSP Compressor Oil.

Replace the oil every 8,000h operating hour or
every 2-year, whichever comes earlier.

Oil Level Gauge

Aftercooler and Intercooler - Condensate Drain Valve

● Verify that air containing drainage is discharged

intermittently from the intercooler and after cooler
drain ports.

The higher the temperature and humidity, the more drainage

  

is produced. Drainage may not be produced on the intercool-

er side during winter.

After cooler
drain port

Intercooler
drain port

7

2. GENERAL DESCRIPTION [Daily Operating Components]

Cooling Water

5

① Shut off the cooling water when the compressor is

off.

② Open the peacock for draining water. Also open

the valve of the water drain port and drain the
cooling water.

③ Be especially careful of freezing during the winter.
(

For details, see page 61.)

Water drain peacock

Control Line Filter (Fixed Speed)

6

● Check the condensate drain discharge from the

control line filter by checking the sight glass on the
control line filter.

Control Line Filter

Sight Glass

Water drain port

8

2. GENERAL DESCRIPTION [Daily Operating Components]

Stopping operation

7

●Normally use UNLOAD STOP button to stop the

compressor. The compressor then unloads for 5
minutes and stops running.

(In the case of an emergency, press the STOP

button to stop operation.)

MONITOR

自動

AUTO

モニタ

MONITOR

メニュー

MENU

＋／−

UP/ 
DOWN

設定

SET

運転管理

RUNNINGCONTROL

警報

ALARM

機能

FUNC

リセット

RESET

遠方

記憶

STR

［×10h］

表示切替/

ワイド モード
SELECT/WIDE

1

運転状況

RUNNINGMODE

遠方

REMOTE

負荷

LOAD

故障

SHUTDOWN

2

電源

POWER

起動待ち

AUTOSTART

運転 停止

STOP

STARTREMOTE

UNLOAD STOP

IMPORTANT

Keeping the second-stage air end as dry as possible is
essential for preventing it from rusting due to a long­term operation suspension. When stopping the DSP,
therefore, execute an unloading operation and thereby
remove the moisture from the second-stage air end.

9

3. OPERATING THE DSP

3.1 Instrument Panel

Liquid Crystal Display

(LCD)

Displays the operation data,
various setting, shutdowns/
alarms information, etc
( page 13)

MONITOR Button

Enables movement within
each of the monitoring
displays (M1, M2) and the
message display (M3). This
button also enables you to
return to the M1 display from
the FUNCTION MENU
display ( page 13).

AUTO light (yellow)

ON (glowing) when an
automatic operation (an
AUTO operation, a schedul­ing operation, or lead/lag
operation) is activated.
ON (flashing) when external
calendar or scheduling
operation is abnormal.
( page 16, 20)

RESET Button

Reset the system or cancels
the shutdown/alarm circuit
( page 15)

自動

AUTO

モニタ

MONITOR

メニュー

MENU

MENU Button

Functions to display the
menu screen and move the
cursor.
( page 18)

MONITOR

+/- UP DOWN Buttons

Each of these buttons act as
an up-arrow, down-arrow
and right-arrow key.
( page 18)

SET Button

It saves any adjusted set
points.

＋／−

UP/ 
DOWN

設定

SET

Contrast adjustment

SET+[ ] button operation:

Brightens the display.
SET+[ ] button operation:
Darkens the display.
( page 22)

10

3. OPERATING THE DSP [Instrument Panel]

Digital Monitor

In addition to basic settings, used
to set various types of setting
values in combination with the LCD
monitor. ( page 22)

運転管理

RUNNINGCONTROL

警報

ALARM

機能

FUNC

リセット

RESET

遠方

記憶

STR

ワ イド モ ード

EMERGENCY STOP button

Stops for emergency.
( page 12)

遠方

REMOTE

負荷

［× 10h］

LOAD

故障

SHUTDOWN

表示切替/

SELECT/WIDE

1

2

G

E

R

N

E

M

E

S

C

Y

P

T

O

運転状況

RUNNINGMODE

電源

POWER

起動待ち

AUTOSTART

運転 停止

STARTREMOTE

RUNNING MODE Light

POWER light (yellow):

ON (glowing) when the power to the air compressor is turned on.

REMOTE light (green):

ON (glowing) when the REMOTE button is pressed in
order to activate a remote operation.
ON (flashing) when an external remote-operation-activation switch has
been turned on in order to activate a remote operation.

LOAD light (yellow):ON (glowing) when the air compressor is loading.
AUTO START light (green):

ON (glowing) while the air compressor is in a stop due to an
AUTO operation, lead/lag operation, or scheduling operation.
ON (blinking) while the air compressor is in a stop due to a
restartable instantaneous power interruption. ( page 16)

SHUTDOWN light (red):

ON (either glowing or blinking) when a shutdown/alarm
problem has occurred. ( page 15)

( page 28)

STOP Button

Used to stop the compressor
immediately without first unload­ing. ( page 12)

STOP

UNLOAD STOP Button

Press this button to stop the air compressor.
The air compressor will stop after removing the
condensate from the air end.

※This stop button is effective while a stand alone operation.

REMOTE Button

Activates or deactivates a remote
start/stop operation locally or on
the instrument panel. it also acts
as a right-arrow key stop
( page 28).

UNLOAD STOP

SELECT/WIDE Button/Light (Yellow)

Press to confirm various types of
setting values, shutdown history,
and setting status. (
To set to ECONOMODE (energy
conservation mode) (standard type
only), press and hold the SELECT/
WIDE button for at least 7 seconds.
The light flashes and ECONOMODE
is set.

page 24, 25

)

Used for normal stop. Stops
after the compressor and air
hoses are dry. ( page 12)

START Button

Starts the air compressor.
The OPERATION light (red) turns
on while the compressor is running.

11

3. OPERATING THE DSP [Start/Stop Operation]

3.2 Start/Stop Operation

3.2.1 Connecting the Power

When you connect the power, the POWER light turns on
and the LCD monitor displays the following screen for 5
seconds, and then switches to the monitor screen (M1)
that displays control settings, discharge air pressure, and
total operating hours.

COMPRESSOR MONITOR

CONTROLLER

5 sec

㻞㻜㻜㻥䠋㻜㻠䠋㻝㻟 㻝㻥䠖㻜㻞

㼀㼅㻼㻱䠖㼂㻿㻰㻭

㻰 㻵 㻿䠊㻼㻾㻱㻿㻿 䠖 㻜䠊㻜 㻜㼜 㼟 㼕

㻾㼁㻺 㻌㻴㻻㼁㻾 䠖 㻝 㻞 㻜 䡄
㻸㻻㻭㻰 㻌 㻴㻻㼁㻾 䠖 㻡 㻠䡄
㻸㻻㻭㻰 㼀 㻵 㻹㻱㻿 䠖 㻝㻞 㻟
㻸㻻㻭㻰 㻾㻭㼀㻱䠖 㻝 㻝䠂
㻸㻻㻭㻰 㼀 㻵 㻹㻱 䠖 㻞 㻠䡏
㼁㻺㻸㻻㻭㻰 㻌 㼀 㻵㻹㻱 䠖 㻝䡏

㻯㼁㻾㻾㻱㻺㼀 䠖 㻡 㻜䠝

㻲㻾 㻱㻽㼁㻱 㻺㻯㼅䠖 㻞 㻟 㻚 㻤䠤䡖

㻻㼁㼀㻼㼁㼀䠖 㻝 㻜 㻚 㻡䡇䠳

3.2.2 Start/Stop

When the START button is pressed the START light
turns on and the compressor starts operating. When run­ning, the asterisk on the right side of running hours
flashes and running time is counted.
To stop, press the UNLOAD STOP button. Operation
stops when the air end and the air piping have dried for 5
minutes.
To stop the compressor immediately without unloading,
press the STOP button.
Note: If the STOP button is pressed while unloading, the
compressor stops immediately.

3.2.3 Emergency Stop

Pressing EMERGENCY STOP botton, the DSP com­pressor immediately.

This switch should only be pressed in emergency.
The compressor can not be restarted until the switch is
manually reset. Turn the switch knob clockwise and
press the RESET button to reset.

＊The asterisk flashes when the clock and total run-

ning hours are engaged.

If phase is reversed, “Connection Error: Reverse
Phase” is displayed on the LCD monitor for setting and

connection inspection. In this case, switch 2 of the 3
main power cables.
If there is no phase, “Connection Error: No Phase” is
displayed on the LCD monitor. In this case, check the
power cables.

12

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

3.3 How to Use the liquid Crystal Display (LCD)

3.3.1 How to Move between the Various Displays

■Monitoring Displays
  There are three monitoring displays: M1, M2, and

M3. To move between these displays, press the
MONITOR button.

■Monitoring Display（p.12）

M1 Monitoring Display

㻞㻜㻜㻥䠋㻜㻠䠋㻝㻟 㻝㻥䠖㻜㻞

㼀㼅㻼㻱 䠖㼂㻿㻰㻭
㻰 㻵 㻿䠊㻼㻾 㻱㻿㻿 䠖 㻜䠊 㻜 㻜 㼜 㼟 㼕

㻾㼁㻺 㻌㻴㻻㼁㻾 䠖 㻝 㻞㻜 䡄
㻸㻻㻭㻰 㻌 㻴㻻㼁㻾 䠖 㻡 㻠 䡄
㻸㻻㻭㻰 㼀 㻵 㻹㻱㻿 䠖 㻝 㻞 㻟
㻸㻻㻭㻰 㻾㻭㼀㻱 䠖 㻝㻝䠂
㻸㻻㻭㻰 㼀 㻵 㻹㻱 䠖 㻞㻠 䡏
㼁㻺㻸㻻㻭㻰 㻌 㼀 㻵 㻹㻱䠖 㻝䡏
㻯㼁㻾㻾㻱㻺㼀 䠖 㻡 㻜䠝
㻲㻾㻱 㻽㼁㻱㻺㻯 㼅䠖 㻞 㻟 㻚 㻤䠤䡖
㻻㼁㼀㻼㼁㼀䠖 㻝㻜 㻚 㻡 䡇䠳

モニタ

モニタ

MONITOR

M2 Monitoring Display

㻞㻜㻜㻥䠋㻜㻠䠋㻝㻟 㻝㻥䠖㻜㻞

㻼㻾㻱㻿㻿㼁㻾㻱

㻵 㻺㼀 㻿 㼀㻳 䠊 㻼 䠖 䚷䚷 㻞 㻥 㼜 㼟 㼕
㻻 㻵 㻸 㻌 㻼㻾㻱㻿 䠖 㻌 㻌 㻝㻡 㼜 㼟 㼕
㻯㻸㼀䠊㻼 㻾㻱㻿 䠖 㻖䠊㻖 㻖 㼜 㼟 㼕
㼀㻱㻹㻼㻱㻾㻭㼀㼁㻾㻱
㻰㻵㻿䠊㼀㻱㻹㻼㻝䠖 㻟㻞㻜䉣
㻰 㻵 㻿䠊㼀㻱㻹㻼 㻞 䠖 㻟㻝㻟㻤䉣
㻻 㻵 㻸 㻌 㼀 㻱㻹㻼 䠖 㻟 㻣 䉣
㻯㻸㼀䠊㼀㻱㻹㻼䠖 㻖㻖㻖䉣
㻞㻺㻰 㻌 㻿㼁㻯㼀䠊㼀䠊 䠖 㻜 㻤䉣
㻹㻭 㻵 㻺㼀㻱㻺 㻭㻺㻯㻱
㻴㻾䠊㼀㻻㻌㻹㻭㻵㻺㼀䠖 㻜㻜㻜㻜䡄

㻺㻱㼄㼀㻌㻹㻭 㻵㻺㼀䠖 㻖㻖㻖㻖

■Message Display（p.13）

M3 Monitoring Display

㻞㻜㻜㻣䠋㻜㻤䠋㻜㻝 㻝㻥䠖㻝㻥 㻖

㼀㼅㻼㻱 䠖㼂㻿㻰㻭
㻰 㻵 㻿䠊㻼㻾 㻱㻿㻿 䠖 㻜䠊 㻠 㻢

䠘㻿 㻴 㼁 㼀 㻰 㻻 㼃 㻺䠚

㻯㻻㻻㻸㻭㻺㼀䠖
㻻㻵 㻸䠖
㻞䠪㻰 㻌 㻿 㼁㻯 㼀䠊 㼀 㻱
㻴㻵㻳㻴 㻌㻰㻵㻿䠊㼀㻱㼜㼟㼕
㻯 㻻 㻺 㼀 㻭 㻯 㼀 㻻 㻾 㻌㻱 㻾 㻾 䠖
㻻㼂㻱㻾 㻸㻻㻭㻰 䠖
㻸㻻㼃 㻌㼃 䠊 㻵 㻺 㼀 㻿 㼀㻳 㻌 㻼䠊
㻰 㻾 㼅 㻱 㻾 㻌㻌㻌㻌 㼃 䠋 㻻 㻌 㻿 㻱 㻼 䠊
㻱㻸 㻱㻹㻱㻺 㼀
㻼㼞㼑㼟㼟㻾㻱㻿㻌㼍㼒㼠㼑㼞㻌㻯㻴㻷䠊

㼀㼁

㼜㼟

MONITOR

㻝

モニタ

MONITOR

㼜㼟㼕

㼕

■Menu Displays
  Follow the bottom line message on the display.

■Function Menu Display（p.16）

機能

FUNCTION

モニタ

MONITOR

Function Menu Display

㼇 㻲㼁㻺㻯㼀 㻵㻻㻺 㻹㻱 㻺㼁 㼉

㻝䠊㻮㻭㻿 㻵㻯 㻌 㻿 㻱㼀 㼁㻼
㻞䠊㻹 㼁㻸 㼀 㻵 㻙㼁 㻺 㻵 㼀
㻟䠊㻯㻭㻼 㻭㻯 㻵 㼀㼅 㻯㻻㻺㼀㻾㻻㻸
㻠䠊㻿㻯㻴㻱㻰 㼁㻸㻱
㻡䠊㻻㻼㻱㻾㻭㼀㻵 㻻㻺 㻰㻭㼀㻭
㻢䠊 㻸㻻㻭㻰 㻰㻭㼀㻭
㻣䠊㻭㻸㻭㻾㻹 㻴 㻵 㻿㼀㻻㻾㼅
㻤 䠊㻿 㻴㼁 㼀 㻰㻻㼃㻺 㻴 㻵 㻿㼀 㻻㻾 㼅

㻿㻱㼀䠖㻻㻼㻱㻺 㻹㻻㻺䠖㻮㻭㻯㻷

IMPORTANT

About the LCD Backlight
(1) In the event that no button has been used for 10

minutes, the LCD backlight automatically turns OFF
for protection to the display panel. It comes ON
again if any button is pressed, other than the
START and STOP buttons.

(2) If an event happens while the LCD backlight is off,

the backlight automatically turns ON and stays ON
as long as the event exists. Remote and instant
stop mode can't be set by the LCD monitor.

Set after referring to “3.4 How to Use the Digital

Monitor.” (

page 21)

■ Message Display
  There is only one message display: M3 (the contents,

however, vary from time to time). It is available only
when some event (air compressor alarm or shutdown,
maintenance notice, etc.) has occurred. Once an event
happens, however, the M3 message display appears
immediately and automatically. From the M3 display,
pressing the MONITOR button will switch the LCD
to the M1 or M2 monitoring displays; but after
approximately ten (10) seconds, the M1 or M2 moni­toring displays will revert back to the M3 display.

13

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

3.3.2 Typical Monitoring Displays

When the DSP is operating normally, typical monitoring
displays appear as follows.

M1 Monitoring Display

㻞㻜㻜㻥䠋㻜㻠䠋㻝㻟 㻝㻥䠖㻜㻞

㼀㼅㻼㻱䠖㼂㻿㻰㻭

㻰 㻵 㻿䠊㻼㻾㻱㻿㻿 䠖 㻜 䠊㻜 㻜 㼜 㼟 㼕

㻾㼁㻺 㻌㻴㻻㼁㻾 䠖 㻝 㻞 㻜 䡄

㻸㻻㻭㻰 㻌 㻴㻻㼁㻾 䠖 㻡 㻠 䡄
㻸㻻㻭㻰 㼀 㻵㻹㻱㻿 䠖 㻝 㻞 㻟
㻸㻻㻭㻰 㻾㻭㼀㻱䠖 㻝㻝䠂

㻸㻻㻭㻰 㼀 㻵㻹㻱 䠖 㻞 㻠 䡏
㼁㻺㻸㻻㻭㻰 㻌 㼀 㻵 㻹㻱 䠖 㻝䡏
㻯㼁㻾㻾㻱㻺㼀 䠖 㻡 㻜䠝

㻲㻾 㻱㻽㼁㻱㻺㻯 㼅 䠖 㻞 㻟 㻚 㻤䠤䡖
㻻㼁㼀㻼㼁㼀䠖 㻖 㻖 㻚 㻖 䡇䠳

㻹㻭㻿㼀㻱 㻾

（1）

㻖

（2）
（3）

㻖

（4）

（5）

（6）
（7）
（8）
（9）

VSDA＊SAVE

Displayed when stop is limited for AUTO opera­tion (standard: no symbol).

ECOMODE
(Energy Conservation Mode)
“SAVE” is displayed on the monitor
screen.

M2 Monitoring Display

㻞㻜㻜㻥䠋㻜㻠䠋㻝㻟 㻝㻥䠖㻜㻞

㻼㻾㻱㻿㻿㼁㻾㻱

㻵 㻺㼀㻿 㼀㻳䠊㻼 䠖 㻌 㻌 㻞 㻥 㼜 㼟 㼕
㻻 㻵 㻸 㻌 㻼㻾㻱㻿䠖 㻌 㻌 㻝㻡 㼜 㼟 㼕
㻯㻸 㼀䠊㻼㻾㻱 㻿 䠖 㻖䠊 㻖 㻖 㼜 㼟 㼕

㼀㻱㻹㻼㻱㻾㻭㼀㼁㻾㻱
㻰㻵 㻿䠊㼀㻱㻹㻼㻝䠖 㻟㻞㻜䉣
㻰 㻵 㻿 䠊㼀 㻱㻹㻼 㻞 䠖 㻟㻝㻟㻤䉣
㻻 㻵 㻸 㻌 㼀㻱 㻹㻼 䠖 㻟 㻣 䉣
㻯㻸㼀䠊㼀㻱㻹㻼䠖 㻖㻖㻖䉣

㻞㻺㻰 㻌 㻿 㼁㻯㼀䠊㼀䠊 䠖 㻜 㻤 䉣
㻹㻭 㻵 㻺 㼀㻱㻺 㻭㻺㻯 㻱

㻴㻾䠊㼀㻻㻌㻹㻭㻵㻺㼀䠖 㻜㻜㻜㻜䡄

㻺㻱㼄㼀㻌 㻹㻭 㻵㻺㼀䠖 㻖㻖㻖㻖

㻝

IMPORTANT

Current is an approximate S-phase ampere.
Output is reference value of calculated power.

䠆

（10）

（11）

(1) Displays current time. Asterisk flashes.

(2) Indicates a capacity control type.

(3) Displays compressor discharge port pressure.

(4) Indicates total running hours (RUN HOUR), total

loaded hours (LOAD HOUR), and total number of

loads (LOAD TIMES.).

Blink asterisk indicates running time is being mea-

sured.

(5) Indicates a percentage of load to unload of the DSP air

compressor (LOAD RATE), For Vtype, the rate is cal-

culated based on only frequency. Indicates “＊＊＊”,

if PQ wide mode is selected.

INTE ：Fixed speed type control (load/unload operation)
AUTO ：Fixed speed type control

(AUTO operation ＊optional)
VSDB ：V type control (AUTO function off)
VSDA ： V type control (with AUTO function, V type standard)
EXIT ：Setting display when capacity control is executed

externally
MR ： Multiple unit control connection by communication

control

(6) Indicates the amperage current of the main motor

(CURRENT).

(7) Displays an operating frequency of main motor.
(V type only. Fixed speed type displays ＊＊．＊)

(8) Indicates “＊＊＊ ” for this air compressor.

(9) Displays master or slave control status when in lead/

lag operation mode.

(10) Displays various pressures and temperatures.
(Asterisk indicates not in use.)

(11) Displays time remaining till next inspection as main-

tenance period and next maintenance period.

14

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

3.3.3 Message Displays

■ Shutdown Messages

① When a shutdown occurs for the compressor, the SHUTDOWN light and shutdown contents on the LCD monitor

(contents are displays on the left side and details are displayed on the right side) flash and the compressor stops run­ning. There are 2 types of screens for shutdown: SHUTDOWN and FAILURE.

㻞㻜㻜㻣䠋㻜㻤䠋㻜㻝 㻝㻥䠖㻝㻥 㻖

㼀㼅㻼㻱 䠖 㼂㻿㻰㻭

㻰 㻵 㻿䠊㻼㻾㻱 㻿㻿 䠖 㻌 㻌 㻢 㻣㼜 㼟 㼕

䠘㻿 㻴 㼁 㼀 㻰 㻻 㼃 㻺䠚

㻯㻻㻻㻸㻭㻺 㼀 䠖
㻻㻵 㻸䠖

㻞䠪㻰 㻌 㻿㼁㻯㼀䠊㼀㻱㻹㻼
㻴㻵㻳㻴 㻌㻰㻵㻿䠊㼀㻱㻹㻼䠖
㻯 㻻 㻺 㼀 㻭 㻯 㼀 㻻 㻾 㻌㻱 㻾 㻾 䠖
㻻㼂㻱 㻾㻸 㻻㻭㻰 䠖

㻸㻻㼃 㻌 㼃 䠊 㻵 㻺㼀 㻿 㼀㻳 㻌 㻼䠊
㻰 㻾 㼅 㻱 㻾 㻌㻌㻌㻌 㼃 䠋 㻻 㻌 㻿 㻱 㻼 䠊

㻱㻸㻱㻹㻱 㻺㼀
㻼 㼞 㼑 㼟 㼟 㻾㻱 㻿 㻌 㼍 㼒 㼠 㼑 㼞 㻌 㻯㻴㻷䠊

㼀㼁

㻌

(Example)
In the case the thermal relay trips and the compressor stops
running, SHUTDOWN and OVERLOAD flash and the mal­function part of the main circuit is indicated.

㻞㻜㻜㻥䠋㻜㻤䠋㻜㻝 㻝㻥䠖㻝㻥 㻖

㼀㼅㻼㻱 䠖 㼂㻿㻰㻭㻌
㻰 㻵 㻿 䠊 㻼㻾 㻱 㻿 㻿 䠖 䚷䚷 㻢 㻣 㼜 㼟 㼕

䠘㻲 㻭 㻵 㻸 㼁 㻾 㻱䠚

㻿 㼅 㻿 㼀 㻱 㻹 㻱 㻾㻾 䠖 㼙㼙㼙㼙
㻿㼅㻿㼀㻱㻹 㻌 㻾㻱㼀㻾㼅
㻼㻯㻮㻌㻱㻾㻾䠖 㼚㼚㼚㼚㼚㼚
㻼㻾㻱㻿㻿䠊㻿㻺㻿㻾㻌 㻱㻾㻾䠖 㼛
㼀㻱㻹㻼䠊㻿㻺㻿㻾 㻱㻾㻾䠖 㼜
㻰䡅 㼟㼏㼛㼚㼚㼑㼏㼠 㼜㼛㼣㼑㼞
㼟㼚㼐 㼏㼛㼚㼠 㼍㼏 㼠
㼐 㼕 㼟 㼠 㼞 䡅㼎㼡 㼠㼛 㼞

㻌㻌 㻌㻌㻌

(Example)
Example of temperature sensor malfunction, sensor 1 discon­nection FAILURE and TEMPERATURE SENSOR flash and
the location of the abnormality is indicated.

② Take the proper corrective action, and press the RESET button.
③ For further information,

see pages 33, 34.

NOTE) Malfunction detection of water failure is available for only water cooled single stage compressor. Malfunction

detection of dryer is available for only built-in dryer models. Malfunction detection of oil water separator and
element is not available.

■ Alarm Messages

 ① In the case an alarm occurs for the compressor, the ALARM light and contents / details displayed on alarm screen on

the LCD monitor flash and operation continues. There are 2 types of alarm screens: ALARM andPROBLEM.

㻞㻜㻜㻥䠋㻜㻤䠋㻜㻝 㻝㻥䠖㻝㻥 㻖

㼀㼅㻼㻱 䠖
㻰 㻵 㻿 䠊 㻼㻾 㻱 㻿 㻿 䠖 䚷䚷 㻢 㻣 㼜 㼟 㼕

䠘㻭 㻸 㻭 㻾 㻹䠚

㻰㻵 㻿䠊㼀㻱㻹㻼䠖䠄㻌 㻌 㻌 䠅㻖㻖㻖䉣
㻻㻵 㻸㻌 㼀㻱㻹㻼䠖 㻖㻖㻖䉣

㻸㻻㼃 㻌㻻䠊㻼䠊䠖 㻖䠊㻖 㻖㼜 㼟 㼕
㻯㻸㼀䠊㼀㻱㻹㻼䠊䠖 㻖㻖 㻖䉣

㻸㻻㼃 㻌 㻯㻸 㼀䠊 㻼 䠖 㻖 䠊 㻖 㻖 㼜 㼟 㼕

㻞䠪㻰 㻙 㻿䠊 㼀 㻱㻹㻼 㻌 㻲 㻵 㻺 㻙 㼀

㻸㻻㼃 㻌 㼃 䠊 㻸㻻㼃 㻌 㻻 㻵 㻸
㻰㻾㼅㻱㻾 㻭 㻵㻾 㻌㻲 㻵 㻸㼀㻱㻾

㻸䠊㻯㻻㼁㻺㼀 㻌 㻻㼂㻱 㻾 㻌㼃䠋㻻 㻌 㻿䠊
㻼㼞㼑㼟䡏㻾㻱㻿 㼍㼒㼠㼑㼞㻌㻯㻴㻷䠊

㻿㻰㻭㻌 㻌㻌 㻌㻌㻌

㼂

(Example)
In the case ALARM and AIR FILTER flash while the com-

㻞㻜㻜㻥䠋㻜㻤䠋㻜㻝 㻝㻥䠖㻝㻥 㻖

㼀㼅㻼㻱 䠖 㼂㻿㻰㻭㻌
㻰 㻵 㻿 䠊 㻼㻾 㻱 㻿 㻿 䠖 䚷䚷 㻢 㻣 㼜 㼟 㼕

䠘㻼 㻾 㻻 㻮 㻸 㻱 㻹䠚

㻯㻻㻺㻺㻱㻯 㼀 㻵 㻻㻺 㻌 㻱㻾㻾䠖 㻌 㻌 㻌
㻾㼑㼏㼛㼚㼚㼑㼏㼠 㻌 㼜㼛㼣㼑㼞䠊
㻹㼁㻸㼀䠥 㻙㼁 㻿㻱㼀 㻱㻾㻾
㻿㻯㻴㻱㻰㼁㻸㻱 㻌 㻿㻱 㼀 㻌 㻱㻾㻾
㻯㻻㻹䠊㻱㻾㻾㻌㻿㼀㻻㻼䠖㻌㻌㻌㻌㻌
㻯㻻㻹䠊㻱㻾㻾㻌㻭㻸㻹䠖 㻌㻌㻌㻌㻌
㻮㻭㼀㼀㻱㻾㼅 㻌㻻㼁㼀

㻼 㼞 㼑 㼟 㼟 㻾㻱 㻿 㼍 㼒 㼠 㼑 㼞 㻯 㻴㻷䠊

㻌㻌 㻌㻌㻌

(Example)
Example of battery replacement period.

pressor is running, it indicates the filter is clogged.

② Take the proper corrective action, and press the RESET button.
③ For further information,

see pages 33, 34.

NOTE) Malfunction detection of water failure is available for only water cooled single stage compressor. Malfunction

detection of dryer is available for only built-in dryer models. Malfunction detection of oil water separator and
element is not available.

IMPORTANT

ALARM and PROBLEM messages are treated as alarms, but aside from connection abnormalities that make operation impos­sible such as reverse phase and no phase when power is turned on, they also may indicate shutdown due to malfunction of the
communication status.

15

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

■ Messages of Automatic Stop Display and Automatic Restart Display
 When the DSP air compressor has automatically stopped, the following screen is displayed, the AUTO START light

flashes/lights, and the RESTART message screen and details of contents flash on the LCD monitor.

● SCHEDULED STOP: Schedule operation setting

＜AUTO light ON＞
 When schedule is set on the scheduled operation

㻞㻜㻜㻥䠋㻜㻤䠋㻜㻝 㻝㻥䠖㻜㻞 㻖

㼀㼅㻼㻱 䠖 㼂㻿㻰㻭㻌

㻰 㻵 㻿䠊 㻼㻾 㻱 㻿 㻿 䠖 䚷䚷 㻢 㻣 㼜 㼟 㼕

䠘㻾㻱㻿㼀㻭㻾㼀䠚

㻾 㻱 㻿 㼀 㻭 㻾 㼀 㻭 㼀 䠖 䠆䠆 䠖 䠆䠆
㻾㻱㻿㼀㻭㻾㼀 㼃㻭 㻵 㼀䠖 㻌 㻞㻣䡏
㻺㻻㼃䠈 㻿 㼀 㻻 㻼 㻼 㻱 㻰 䠞䠵 䠖
㻿㻯㻴㻱㻰㼁㻸㻱 㻿㼀㻻㻼
㻭㼁㼀㻻㻹㻭㼀 㻵 㻯 㻿 㼀㻻㻼
㻰㻾㼅㻱㻾 㻼㻾㻱㻿㼀㻭㻾㼀㻱㻰
㻰㼁㻭㻸䠋㻮㻭㻯㻷㼁㻼

㻵 㻼 㻵 㻌 㻾㻱㻿㼀㻭㻾㼀

㻯㼀㻸㻾䠊㻾㻱㼀㻾㼅

㻌㻌 㻌㻌㻌

screen, displays state of operation being stopped by
preset time. Operation starts automatically when the
preset restart time comes.

● LEAD/LAG OPERATION STOP
(Note: applies only to machines equipped with two-

unit alternate operation.)

＜AUTO light ON＞
 When the operation control mode is set to dual or

backup on the operation mode setting screen, standby
status of the slave machine in dual or backup operation
is indicated.

● DRYER PRESTARTED

(Note: Applies only to machines equipped with a
built-in dryer.)

＜AUTO START light flashes＞
 When dryer prestart is set, the dryer starts operating

in advance, and compressor stopped status is indicat­ed.

 RESTART WAIT time is counted down.

● AUTO OPERATION

(Note: Applies only to machines equipped with
AUTO function)

＜AUTO START light ON＞
  Indicates status stopped by low load when set to

AUTO operation. AUTO START light flashes during
restart limit while stopped, and RESTART WAIT time
is counted down.

● INSTANT STOP / RETRY

(Note: Retry applies to V type only.)

＜AUTO START light flashes＞
  Displays status of restart for instantaneous power

interruption (IPI) restart and V type retry.

 RESTART WAIT time is counted down.

16

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

■ Maintenance Notice Messages

A maintenance date is determined by the amount of total operating hours or an elapsed calendar period, whichever

comes first. When the maintenance date or time arrives, the maintenance notice message appears on the display under
the heading of MAINTenance.

This function is an alarm display only, and does not output alarm externally.
Replace suction throttle valve consumable parts when inspection maintenance is displayed or the 1 million unloader

count alarm is given, whichever comes first.

㻞㻜㻜㻥䠋㻜㻤䠋㻜㻝 㻝㻥䠖㻜㻞 㻖

㼀㼅㻼㻱 䠖 㼂㻿㻰㻭㻌
㻰 㻵 㻿䠊㻼㻾㻱 㻿㻿 䠖 㻌 㻌 㻢 㻣 㼜 㼟 㼕

䠘㻹㻱㻿㻿㻭㻳㻱䠚

㻹㻭 㻵 㻺 㼀䠊 䠖㻝 㼅㻱 㻭 㻾㻌 㻌
㻹㻭 㻵 㻺㼀 䠊䠯䠟䠤䠡䠠䠱 㻸 䠡 䠖 㻭
㻼 㼞 㼑 㼟 㼟㻿㻱 㼀 㻌 㼍 㼒 㼠 㼑 㼞 㻌 㻯㻴㻷䠊
㻹㻭 㻵 㻺 㼀䠊㻯㻻㻹㻼 㻸 㻱 㼀㻱 㻰
㻿㼃 㻵 㼀㻯㻴㻱㻰 㻌 㼀㻻 㻌 㻸㻻㻯㻭㻸

㻵 㻺 㻌 㻻㼂㻱㻾䠮㻵 㻰㻱 㻹㻻㻰㻱
㻵㻺㻌㼁㻺㻸㻻㻭㻰㻌㻿㼀㻻㻼

㻿㼃 㻵 㼀 㻯㻴 㻱 㻰 㻌 㼁 㻌 㻹㻻㻰 㻱

㻌㻌 㻌㻌㻌

(1)
(2)
(3)

Every these calendar periods: Service the DSP according to the schedules:

0.5 years, 1.5 years, 2.5 years

3.5 years, 4.5 years, 5.5 years

1.0 years, 5.0 years Yearly + Half-Yearly

2.0 years, 4.0 years 2-Yearly + Yearly + Half-Yearly

3.0 years 3-Yearly + Yearly + Half-Yearly

6.0 years (for overhauling)

Standard Maintenance Schedule (A) (for yearly 8,000-or-less operating hours)

A

Standard Maintenance Schedule (B) (for yearly 4,000-or-less operating hours)

B

Half-Yearly

6-Yearly + 3-Yearly + 2-Yearly + Yearly + Half-Yearly

CAUTION

If the inspection/maintenance is displayed, check the display contents, refer to maintenance standards
given in the compressor instruction manual and perform inspection/maintenance as soon as possible.
When inspection is complete, press and hold the SET button for at least 7 seconds.
The LCD monitor display contents then move to “Maintenance initial value completed” of the message
screen, and then return to the monitor screen 1 minute later.

NOTES:

1. MAINTenance can be reset, if the servicing is done earlier than expected and if the remaining operating time to next maintenance
is less than 2,000h in the case of A, 1,000h in the case of B.

2. On the contrary, if the servicing is done after the maintenance notice has appeared, the remaining operating hours to the next main­tenance has been zero until the maintenance is done. After maintenance and resetting the counter, new counting time starts just
after the maintenance notice message has appeared on the display.

■ Other Messages

(1)SWITCHED TO LOCAL.

If set to local by remote operation following shut-

down restoration, operation automatically returns
to local when shutdown occurs, and the message is
displayed for 1 minute. For setting details, see

“3.4 How to Use the Digital Monitor.”

(

page 25)

(2) IN OVERRIDE MODE.

This message blinks when the DSP is in an over-

ride mode.

(3) UNLOAD STOP

If the UNLOAD STOP button is used, the display

flashes. The compressor unloads for 5 minutes and
then stops.

17

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

3.3.4 How to Move within a Menu Display and to Change a Setting

ー [FUNCTION MENU] and [MAINTenance DATA MENU] ー

 The method and procedure for altering settings is displayed using the following as an example.

How to Move within a [FUNCTION MENU] Display

1

㼇 㻲 㼁㻺㻯㼀 㻵 㻻㻺 㻹㻱㻺㼁 㼉

㻝䠊㻮㻭㻿 㻵 㻯㻌 㻿㻱 㼀㼁㻼
㻞 䠊㻹㼁 㻸 㼀 㻵 㻙 㼁㻺 㻵 㼀
㻟䠊㻯㻭㻼㻭㻯 㻵 㼀㼅 㻯㻻㻺㼀㻾㻻㻸
㻠䠊㻿㻯㻴㻱㻰㼁㻸 㻱
㻡䠊㻻㻼 㻱㻾 㻭㼀 㻵 㻻㻺 㻰 㻭㼀 㻭
㻢䠊㻸㻻㻭㻰 㻰㻭㼀㻭
㻣䠊㻭㻸㻭㻾㻹 㻴 㻵 㻿㼀㻻㻾㼅
㻤 䠊 㻿 㻴㼁㼀㻰㻻㼃㻺 㻴 㻵 㻿㼀 㻻㻾 㼅

1 – 2.

② Select the number of the item to be set with the

▽

△

③ Enter with the SET button. The display then switches

to the detail setting screen for that item.

The following explanation uses [2. Operation Mode
Setting Screen] as an example.

① Press the MENU button displayed on monitor screen

㻿㻱 㼀 䠖 㻻㻼㻱 㻺 㻹㻻㻺䠖 㻮㻭㻯㻷

How to Select or Change a Setting within a Setting Display

2

① When the display switches to the details screen, move

㼇㻹㼁㻸㼀 㻵 㻙㼁 㻌 㻿㻱㼀㼀 㻵 㻺㻳㼉

㻝

㻹㻻㻰 㻱 䠖 㻳㻸
㻞䠊㻰㼁㻭㻸㻌 㼀 㻵 㻹㻱䠖 㻌 㻤䠊
㻟䠊㻹㻱㼀㻴㻻㻰 䠖 㻭㻼
㻠䠊㻿㼃 㻵 㼀㻯㻴㻻㼂㻱㻾䠖 㻜 㻝 㻡 㼟
㻡䠊㻮㻭㻯㻷㼁㻼 䠖 䚷䚷䚷㻣㼜
㻢䠊㼁 㻺㻸㻻㻭㻰䠖 䚷䚷䚷㻟 㼜㼟 㼕

㻭㻸㼀䠊㼀㻵㻹㻱䠖㻌 㻠㻤㻜㻹㻵㻺

㻣

㻯㻻㻺㼀 㻾㻻 㻸 㻹㻻㻰 㻱 䠖 㻮

㻤

㻌 㻿㻺

㻜㼔

㻻㼂㻾 㻾㻸

㼟㼕

to the line to be altered with the
tons.

IMPORTANT

Items with a dash next to their number cannot be altered
on the LCD monitor. In this case, alter from the digital
monitor while referring to the instructions manual for the
compressor.

buttons.

△

▽

but-

㻿㻱㼀䠖㻿㼀㻻㻾㻱 㻌㻹㻻㻺䠖㻮㻭㻯㻷

①

㻝 㻹㻻㻰 㻱 䠖
㻞䠊㻰㼁㻭㻸㻌 㼀 㻵 㻹㻱䠖 㻌 㻤䠊㻜 㼔
㻟䠊㻹㻱㼀㻴㻻㻰 䠖
㻠䠊㻿㼃 㻵 㼀㻯㻴㻻㼂㻱㻾䠖 㻜 㻝 㻡 㼟

㻳㻸㻿㻺

㻭㻼㻻㼂㻾 㻾㻸

②

㻝 㻹㻻㻰 㻱 䠖
㻞䠊㻰㼁㻭㻸㻌 㼀 㻵 㻹㻱䠖 㻌 㻤䠊㻜 㼔
㻟䠊㻹㻱㼀㻴㻻㻰 䠖
㻠䠊㻿㼃 㻵 㼀㻯㻴㻻㼂㻱㻾䠖 㻜 㻝 㻡 㼟

㻳㻸㻿㻺

㻭㻼㻻㼂㻾 㻾㻸

③

㻝 㻹㻻㻰 㻱 䠖
㻞䠊㻰㼁㻭㻸㻌 㼀 㻵 㻹㻱䠖 㻌 㻡䠊㻜 㼔
㻟䠊㻹㻱㼀㻴㻻㻰 䠖
㻠䠊㻿㼃 㻵 㼀㻯㻴㻻㼂㻱㻾䠖 㻜 㻝 㻡 㼟

㻳㻸㻿㻺

㻭㻼㻻㼂㻾 㻾㻸

④

㻹㻻㻰 㻱 䠖

㻝
㻞䠊㻰㼁㻭㻸㻌 㼀 㻵 㻹㻱䠖 㻌 㻡䠊㻜 㼔
㻟䠊㻹㻱㼀㻴㻻㻰 䠖
㻠䠊㻿㼃 㻵 㼀㻯㻴㻻㼂㻱㻾䠖 㻜 㻝 㻡 㼟

㻳㻸㻿㻺

㻭㻼㻻㼂㻾 㻾㻸

Move to the item to be altered with the

②

▽

③

Alter the setting value with the

△

④ After altering the setting value, press the SET button.

The cursor moves to the number.

⑤ Press the SET button again.
  The cursor moves to the first number at the top of the

screen and the setting contents are entered.

When setting is complete, pressing the MONITOR but­ton once returns the display to the MENU screen, and
pressing it again returns to MONITOR screen 1.
The same procedure is used to alter settings for other
menus.

IMPORTANT

When altering settings of the LCD screen, number update
by button operation is slow. Press the buttons slowly
when altering settings.

⑤

㻝 㻹㻻㻰 㻱 䠖
㻞䠊㻰㼁㻭㻸㻌 㼀 㻵 㻹㻱䠖 㻌 㻡䠊㻜 㼔
㻟䠊㻹㻱㼀㻴㻻㻰 䠖
㻠䠊㻿㼃 㻵 㼀㻯㻴㻻㼂㻱㻾䠖 㻜 㻝 㻡 㼟

㻳㻸㻿㻺

㻭㻼㻻㼂㻾 㻾㻸

button.

▽

buttons.

18

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

3.3.5 [FUNCTION MENU] −Setting Displays

Model Setting Confirmation

1

㼇㻮㻭㻿㻵㻯 㻿㻱㼀㼁㻼㼉
㼂㻱㻾䠊䠖 㻡䠊㻜
㻿㻱㻾 㻵 㻱㻿 㻺㻭㻹㻱䠖 㻰㻿㻼
㻯㻻㻻㻸 㻵 㻺㻳 㻹㻱 㼀㻴㻻㻰䠖 㼃㼀㻾
㻺㻻䠊㻻㻲 㻿 㼀㻭 㻳㻱 䠖 㻌 㻞
㻼㻙㻿㻼㻱㻯䠖 䚷㻝 㻜㻜㼜㼟㼕

㻼 䠊 㻰 㻭 㼀 㻭 䠖 䚷䚷 㻢 㻤 㼜 㼟 㼕
䠟䠰䠖 㻞㻡㻜䠝
㻯㻸 㼀䠊㻰 㻱 㻸 㻭㼅 䠖 㻌 㻡 㼟

㻵㻼㻵䠖 㻵㻵㻵

㻭㻰㻾 㻱 㻿 㻿 㻺㻻䠊 䠖 㻌 㻝

㻹㻻㻺 䠖 㻮㻭㻯㻷

IMPORTANT

The screen provides the model and serves as a target for
setting status. Check the screen when making an inquiry.

㻡䠊㻜

①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩

The starter of settings can be confirm the software,
model and setting status of model-specific settings such
as capacity control. (Double asterisks are displayed for
settings that do not require confirmation.)

① Indicates board software version.
② Indicates compressor type.
③ Displays cooling type.
④ Displays the number of compressor stages.
⑤ Displays pressure specification.
⑥ Displays interstage pressure.
⑦ Indicates CT setting value.
⑧ Displays water failure detection conditions for water

cooled compressor.

⑨ Displays status of instantaneous power interruption

(IPI) restart setting.
Displays compressor number. (Must be distinguished by

⑩

number is using communication function.)

Operation Mode Settings

2

Confirm settings by compressor alternate operation
specifications and multiple unit control (communication
support). Wiring must be supplied separately for use.
Items for which a dash is displayed next to their num­ber cannot be set on the LCD monitor.

㼇㻹㼁㻸㼀 㻵 㻙㼁 㻌 㻿㻱㼀㼀 㻵 㻺㻳㼉

㻝

㻹㻻㻰 㻱 䠖 㻳㻸
㻞䠊㻰㼁㻭㻸㻌 㼀 㻵 㻹㻱䠖 㻌 㻤䠊
㻟䠊㻹㻱㼀㻴㻻㻰 䠖 㻭㻼
㻠䠊㻿㼃 㻵 㼀㻯㻴㻻㼂㻱㻾䠖 㻜 㻝 㻡 㼟
㻡䠊㻮㻭㻯㻷㼁㻼 䠖 㻌 㻌 㻌 㻣㼜
㻢䠊㼁 㻺㻸㻻㻭㻰䠖 㻌 㻌 㻌 㻟㼜 㼟 㼕

㻭㻸㼀䠊㼀㻵㻹㻱䠖㻌 㻠㻤㻜㻹㻵㻺

㻣

㻯㻻㻺㼀 㻾㻻 㻸 㻹㻻㻰 㻱 䠖 㻮

㻤

㻿㻱㼀䠖㻿㼀㻻㻾㻱 㻌㻹㻻㻺䠖㻮㻭㻯㻷

㻌 㻿㻺

㻜㼔

㻻㼂㻾 㻾㻸

㼟㼕

1. Operation control: Set operation control is dis-

played on the digital monitor.

IMPORTANT

If using the backup function, switch to the digital moni­tor and set.

2. LEAD/LAG operation time: Time setting for alter-

nate operation of a pair of compressors (setting
range: 0.1 – 99.9 hours; initial value: 8.0)

3. Switching conditions: Setting of conditions for

switching operation between a pair of compressors

4. Switching time: Switching time setting if switch-

ing conditions are “parallel” or “interval” (setting
range: 5 – 300 seconds, initial value: 15)

Single Operates compressor independently.

Case where multiple unit control is executed by communication

STPR

Multiple

（）

Backup

OVER LAP

Interval

function of multi roller EX (dedicated panel of NEXT Series).
Unit control is executed by RS485 communication according to

unit

the settings. Requires separate setting of compressor number.

Operation alternates between a pair of compressors for

Dual

a preset amount of time. AUTO light lights.
Operation mode that adds pressure backup function to

dual operation. When pressure drops, the slave machine
starts. AUTO light lights.

Method whereby first compressor is stopped after switching time for
the other unit in parallel operation when it is time for dual operation.

Method of operating the other compressor after stopping the
first one after switching time when it is time for dual operation.

5. BACKUP: Setting of pressure to start the backup

compressor when set to backup operation (range: 0.00
– 72 psi, initial value: 7, difference from recovery pres­sure in the minus direction).

6. UNLOAD:

Pressure setting that manually unloads 1 unit
when the preset pressure is reached in backup operation
(range: 0.00 – 72 psi, initial value: 3, difference from con­trol pressure in the minus direction).

7. DUAL TIME:

Displays time remaining until switch for
dual / backup operation. Time is not counted down
when operating 2 units for backup operation. When
operation is stopped, remaining time is maintained.

8.

SPEED CONTROL MODE: Displays control mode of V

type. An asterisk is displayed for the Fixed speed type.

IMPORTANT

Altered setting values can only be entered when the com­pressor is not running.

19

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

Capacity CONTROL SETTING Display

3

Screen for confirming pressure settings for capacity con­trol. Pressure settings are set from the digital monitor.
Pressure settings consist of setting 1 and setting 2,
which can be used by setting time used.

①② ③

㼇 㻯㻻㻺 㼀㻾㻻㻸 㻿 㻱 㼀 㼀 㻵 㻺㻳 㼉
㻝䠊㼀㼅㻼㻱䠖㼂㻭 㼎㼎㼎 㼏㼏㼏
㻞䠊䠬
㻟䠊䠬 㻵

㻠
㻡

㻢

㻣

㻤䠊㼀 㻵㻹㻱䠖㻝㻤䠖㻜㻜

㻿㻱㼀䠖㻿㼀㻻㻾㻱 㻌㻹㻻㻺䠖㻮㻭㻯㻷

㻸㻻㻿㻿 䠖 㻖 䠊 㻖 㻖 㼜 㼟 㼕

㻯㻭䠖㻖㻖㻖 㻖㻖䠊㻖䡉㻟
䠄㻯㻻㻺㼀㻾㻻㻸䠋㻯㼁㼀㻙 㻵 㻺 㻕
㻼㻝䠖 㻌 㻝 㻜㻜䠋㻌 㻌 㻤㻣㼜㼟 㼕
㻼㻞䠖 㻌 㻝 㻜㻜䠋㻌 㻌 㻤㻣㼜㼟 㼕

䠄㼀㻭㻾㻳㻱㼀㻌 㻼㻝䠋㻼㻞 㻕

㼀㻭㻾㻳㻱 㼀 䠖

㻌㻌 㻥㻤䠋㻌㻌 㻥㻤㼜㼟㼕

㼀㻵㻹㻱㻌㻸 㻵㻹㻵 㼀䠖 㻜㻟㻜㼟

䠄㻼 㻞 㻱 㻲㻲㻱㻯㼀 㻵 㼂㻱 㻕

㻞㻞䠖㻜㻜

④

⑤

⑥

1. TYPE: Displays setting data for capacity control.

① Control settings set by the digital monitor can be con-

firmed.
Fixed speed type: I (load/unload operation) / IP (AUTO

operation specifications ＊ optional)

V type: VB (AUTO function off)/ VA (AUTO operation

specifications)

② Setting type of pressure set by the digital monitor can

be confirmed.

SETTING 1: Standard pressure setting;
SETTING 2: 2nd pressure setting
EXT: External load/unload setting
AUTO: Switches setting 1 and setting 2 by time.
③ Sets optional conditions. With standard specifications,

displays “ordinary” characters.

2 - 3. OPTION: Used for options.

4 - 6. PRESSURE SETTING: Pressure settings set by

the digital monitor, target pressure and time limit can be
confirmed all at once on the LCD monitor. ④

7. TIME LIMIT: (Fixed speed type only)
Preset time limit can be confirmed.
The time limit is effective when ECOMODE (energy
conservation mode) is selected by pressing and holding
the DISPLAY SWITCH button for at least 7 seconds.
The function sets energy conservation mode until con­trol pressure (unload start pressure) drops to the target
value if the load and unload repeat time clears the time
limit. If control pressure and recovery pressure change

time is measured and it exceeds the time limit, control
pressure is lowered so the time limit is no longer
exceeded. ⑤
(Time limit range: 30 - 120 seconds; initial value: 30 sec­onds)

8. USE TIME: Sets time to use pressure of setting 2. At
that time, it displays automatic at the position of (2) of
the type. When start and stop time become the same
value, the automatic display is returned to setting 1 and
the function is stopped.

IMPORTANT

Settings are selectable when the DSP is in a stop.

Schedule Setting

4

Scheduled operation can be set for 1 day (standard equip­ment).

㼇 㻿㻯㻴㻱㻰㼁㻸㻱 㻌 㻿 㻱 㼀㼀 㻵 㻺㻳 㼉

㻝䠊㻹㻻㻰㻱 䠖 㻯㻴㻱㻰㼁㻸 㻱

㻿㼀㻭㻾㼀 㻿㼀㻿㻻㻼
䠄㻝䠅㻜㻣䠖㻜㻜㻌 㼅 㻞㻜䠖㻜㻜 㻌 㼅
䠄㻞䠅㻜㻜䠖㻜㻜㻌 㻺 㻜㻜䠖㻜㻜 㻌 㻺
䠄㻟䠅㻜㻜䠖㻜㻜㻌 㻺 㻜㻜䠖㻜㻜 㻌 㻺
䠄㻠䠅㻜㻜䠖㻜㻜㻌 㻺 㻜㻜䠖㻜㻜 㻌 㻺
䠄㻡䠅㻜㻜䠖㻜㻜㻌 㻺 㻜㻜䠖㻜㻜 㻌 㻺

㻞䠊㻾㻱㻯㻻㻾㻰 㻝䠖 㻝㻜䠖㻜㻜
㻟䠊㻾㻱㻯㻻㻾㻰 㻞䠖 㻝㻥䠖㻜㻜

㻿㻱㼀䠖㻿㼀㻻㻾㻱 㻌㻹㻻㻺䠖㻮㻭㻯㻷

The display shows an example setting of scheduled opera­tion from 7:00 to 20:00. “19:07” indicates the current time

㻝㻥䠖㻜㻣

1. MODE: Scheduling Mode

OFF

SCHEDULED

Operates the DSP without a schedule.

Operates the DSP according to a daily 24­hour calendar.

1. to 5. : Five Start/Stop Time Patterns

･ START: Starting Time
･ STOP: Stopping Time
･ Y or N :Yes starts or stops as scheduled.

2. DATA MEASUREMENT TIME: Time for recording

operation data twice a day can be set.

Recorded operation data can be confirmed by the “5”

operation data record screen.

IMPORTANT

IMPORTANT

If the time limit is altered, consult with your dealer or the
Hitachi Service Station given on the rear cover.

20

If “SCHEDULE” is set, the AUTO light lights. If there is no
valid setting for time, the AUTO light flashes. Altered set­ting can only be entered when the compressor is not run­ning.

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

Operation Data Display

5

㼇 㻻㻼㻱 㻾㻭㼀 㻵 㻻㻺 㻰 㻭㼀 㻭 㼉

㻝䠊㻜㻤䠋㻜㻝 㻝㻜䠖㻜㻜
㻼䠖㻌 㻢㻣䚸㻌 㻢㻤䚸㻖㻖㻖䚸㻖㻖㻖
㻯䠖 㻜
㼀䠖 㻣㻣䚸 㻥㻝䚸㻖㻖䚸㻖㻖䚸㻖㻖
㻸䠖 㻡 㻥䚸㻝 㻤䠊㻤

㻞䠊㼍㼍䠋㼎㼎 㼏㼏䠖㼐㼐
㻼䠖㻖㻖㻖䚸㻖㻖㻖䚸㻖㻖㻖䚸㻖㻖㻖
㻯䠖㻖㻖㻖
㼀䠖㻖㻖㻖䚸㻖㻖㻖䚸㻖㻖䚸㻖㻖䚸㻖㻖
㻸䠖㻖㻖㻖䚸㻖㻖㻖㻖㻖

㻹㻻㻺 䠖 㻮㻭 㻯㻷

Records date/time, pressure, current, temperature and
load status at that time as operating state recorded by
data measurement time. Up to 12 times can be recorded,
after which the oldest data is deleted one at a time; the
latest data is displayed for item 1. The screen shows
record for 2 times, and the necessary data can be con-

▽

firmed by

△

button operation. If altered before
time is up, the data prior to change is maintained, and the
time recorded as soon as the data is altered changes.

1. and 2. - :Indicates the MONTH / DAY HOUR: MINUTE.
P - Represents a pressure (psi) and indicates, from left to

right, the: Discharge air pressure, pressure data.

C - Current (A).
T - Represents a temperature (℉)and indicates from

left to right: 1st stage discharge air temperature, 2nd
stage discharge air temperature.

L -

Represents a load ratio percentage (%). and out put (kW).

If there is no data, an asterisk is displayed.

Alarm History

7

If an alarm occurs on the digital monitor, shutdown histo­ry is recorded. Up to 6 items of alarm history however
can be recorded aside from shutdown history. Contents
and occurrence state can be confirmed.

㼇 㻭 㻸 㻭 㻾㻹 㻴 㻵 㻿 㼀㻻㻾 㼅 㼉

㻝䠊 㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍

㻯㻻㻰㻱䠖㻞㻝㻸 㻺㻻㻿䠊䠖㻌 㻝

㻜㻣䠋㻜㻤䠋㻜㻝 㻝㻥䠖 㻞㻢

㻞䠊 㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖

㻯㻻㻰㻱䠖㻖㻖㻖 㻺㻻㻿䠊䠖㻖㻖

㻖㻖䠋㻖㻖䠋㻖㻖 㻖㻖䠖 㻖㻖

㻟䠊 㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖㻖

㻯㻻㻰㻱䠖㻖㻖㻖 㻺㻻㻿䠊䠖㻖㻖

㻖㻖䠋㻖㻖䠋㻖㻖 㻖㻖䠖 㻖㻖

㻹㻻㻺 䠖 㻮㻭㻯㻷

①

① Operation state is indicated by a symbol next to the

shutdown code.

L: Load, U: Unload, S: Stop
Displays alarm contents and code, date, time, state and
how many times alarm occurred. If the same alarm con­tinues to occur, it is overwritten as update data, and the
number of times the alarm occurs is updated. The latest
warning is recorded as item 1. If there is no alarm, aster­isks are displayed. The screen displays data for 3 types,

▽

and the necessary data can be confirmed by

△

button operation.

Shutdown History Display

8

Load Data Display

6

㼇 㻸㻻㻭㻰 㻰㻭㼀㻭 㼉

㻝䠊㻜㻤䠋㻜㻝
㻭㼂㻳䠊㻼㻾 㻱 㻿㻿 䠖 㻌 㻌 㻣 㻡 㼜 㼟 㼕
㻭㼂㻳䠊㻯㼁㻾㻾㻱㻺㼀䠖 㻜㻠㻜䠝
㻭㼂㻳䠊㻸㻻㻭㻰 㻾㻭㼀㻱䠖㻜㻢㻡䠂
㻭 㼂 㻳 䠊 㻼 䠫䠳 䠡 䠮 䠖 㻌 㻝 㻣 㻚 㻤 㼗 㼃
㻞䠊㻜㻝䠋㻜㻝
㻭㼂㻳䠊㻼㻾 㻱 㻿㻿 䠖 㻌 㻌 㻣 㻡 㼜 㼟 㼕
㻭㼂㻳䠊㻯㼁㻾㻾㻱㻺㼀䠖 㻜㻠㻜䠝
㻭㼂㻳䠊㻸㻻㻭㻰 㻾㻭㼀㻱䠖㻜㻢㻡䠂
㻭 㼂 㻳 䠊 㻼 䠫䠳 䠡 䠮 䠖 㻌 㻝 㻣 㻚 㻤 㼗 㼃

㻹㻻㻺 䠖 㻮㻭㻯㻷

This display shows the averaged load data per day. Data
can be recorded for a maximum of six days; the 7th day of
averaged loaded data is automatically deleted and the 1st
or most recent day of averaged data is added. The most
recent data is arranged at the top of the display.
The screen shows record for 2 times, and the necessary

▽

data can be confirmed by

△

button operation.
Data is averaged from operation start to stop. The aver­age is however fixed at 0.00 minutes in the case of 24
hours operation.

㼇 㻲㼁㻺㻯 㼀 㻵 㻻㻺 㻹㻱 㻺㼁 㼉

㻝䠊㻮㻭㻿 㻵 㻯㻌 㻿㻱 㼀㼁㻼
㻞䠊㻹 㼁㻸 㼀 㻵 㻙 㼁 㻺 㻵 㼀
㻟䠊㻯㻭㻼㻭㻯㻵 㼀㼅 㻯㻻㻺㼀㻾㻻㻸
㻠䠊㻿㻯㻴㻱㻰㼁 㻸㻱
㻡䠊㻻㻼㻱㻾㻭㼀㻵 㻻㻺 㻰㻭㼀㻭
㻢䠊㻸 㻻㻭㻰 㻰㻭㼀 㻭
㻣䠊㻭㻸㻭㻾㻹 㻴 㻵 㻿㼀㻻㻾㼅
㻤䠊 㻿 㻴㼁 㼀㻰 㻻㼃㻺 㻴 㻵 㻿㼀 㻻㻾 㼅

㻿㻱㼀䠖㻻㻼㻱㻺 㻹㻻㻺䠖㻮㻭㻯㻷

㼇㻰㻱 㼀㻭 㻵 㻸㻿 㼉
㻝䠊 㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍㼍

㻰 㻵 㻿䠊㻼㻾㻱㻿 䠖 㻌 㻌 㻠 㻤 㼜㼟 㼕

㻵 㻺 㼀㻿 㼀㻳䠊 㻼 䠖 㻖 䠊 㻖 㻖 㼜 㼟 㼕
㻻 㻵 㻸 㻼㻾㻱㻿 䠖 㻖䠊 㻖 㻖 㼜 㼟 㼕
㻯㻸 㼀䠊㻼㻾㻱㻿 䠖 㻖䠊 㻖 㻖 㼜 㼟 㼕
㻰㻵 㻿䠊㼀㻱㻹㻼䠊㻝䠖 㻝㻤㻜䉣
㻰㻵 㻿䠊㼀㻱㻹㻼䠊㻞䠖 㻝㻤㻜䉣
㻻㻵 㻸 㼀㻱㻹㻼䠖 㻖㻖㻖䉣
㻯㻸 㼀䠊 㼀㻱 㻹㻼䠖 㻖 㻖 㻖 䉣
㻞㻺㻰 㻿 㼁㻯㼀䠊㼀 䠖 㻖㻖 㻖 䉣
㻯㼁㻾㻾㻱㻺㼀䠖 㻝 㻜㻜㻭

㻹㻻㻺 䠖 㻮 㻭㻯 㻷

Up to 6 items of alarm history are recorded aside from
shutdown history. Contents and occurrence state can be
confirmed. Select the number of the shutdown on the
SHUTDOWN HISTORY screen, press the SET button
and the operation state when the shutdown occurred can
furthermore be confirmed on the details screen.

● How to clear shutdown and alarm history.
  If you want to clear the entire shutdown history and

alarm history, set F041 from the F mode of the digital
monitor to “1: CLEAR HISTORY” while referring to
the instructions manual of the compressor.

21

3. OPERATING THE DSP [How to Use the Liquid Crystal Display (LCD)]

3.3.6 Other Hardware Setting

󱦯 Initial Setting

The calendar and clock are set by Hitachi prior to
delivery. To reset the calendar and clock, please con­tact the local Hitachi distributor.

󱦱 Brightness Adjusting

Adjust the LCD brightness as follows:
To brighten:
Hold down the SET button and press the

MONITOR button.

To darken:
Hold down the SET button and press the

FUNCTION button.

󱦳 Digital Monitor Operation Classification

The following is a table of contents that can be set by
the LCD monitor and digital monitor (next section).

Function Item

Operation Mode

Screen

Capacity Control

Screen

Scheduled Operation

Screen

Other Settings

Reset

Mode
Dual operation time
Switch conditions
Switch time
Backup pressure
Unload
Dual operation remaining time
Speed control mode
Type (Left: Capacity control)
Type (Center: Setting type)
Type (Right: Function)
Pressure loss
Total piping capacity
Control pressure
Recovery pressure
Target pressure
Time limit
Setting 2: Use time
Contents
Start/stop time
Data measurement time
Compressor No. setting
Instantaneous power interruption (IPI) setting
Remote operation setting
Dryer operation setting
AUTO operation setting
Energy saving mode setting
Shutdown/alarm reset
Load count reset
Maintenance reset
Shutdown/alarm history clear

󱦵 3-Language Display Switch

The language of the display can be switched to
Japanese, English or Chinese by the dip switch on the
back of the LCD monitor board. If the language needs
to be changed, consult with your dealer or the Hitachi
Service Station given on the rear cover.

Power must be turned off before changing setting.

LCD monitor oper-

ation

− ○ F000
○
○
○
○
○

△(AUTO change)

−

○
○
○

−

○
○
○
○

−

○−

− ○ F041

Bit

Japanese setting

English setting

Chinese setting

Test mode

Digital monitor

(F mode)

−

○(Factory set)

○ F019
○ F018

−

○ F022 〜
○ F022 〜
○ F022 〜

○(Factory set)

−

○ F001
○ F002 〜
○ F005 〜
○ F008 〜
○ F011 〜

○
○
○

1234〜 8

OFF OFF

ON OFF

OFF ON

ON ON

Remarks

Dual, backup, etc.

Differential pressure
Differential pressure

V type only
Example: I type (load/unload type)
Example: Setting 1
Option (not supported)
Option (not supported)
Option (not supported)
Setting 1, Setting 2
Setting 1, Setting 2
Pressure differential
Energy saving mode decision time

Function switch

Operation data measurement

Display switch button operation
Reset button operation
Remote + display switch button
Set button 7 sec. ON

Not used

22

3. OPERATING THE DSP [How to Use the Digital Monitor]

3.4 How to Use the Digital Monitor

3.4.1 How to display operation status, shutdown history, and status of various settings

  All display contents of the digital monitor are linked with the LCD monitor. All of the following display contents can be

can be confirmed by the LCD monitor.

  Use the following operations to display the contents of other operation/setting status on the LCD monitor and simply

confirm operation status and setting status by the digital monitor.

(1) How to Display the Operation Status

P： Dischargepressure(psi)

PressSWITCHDISPLAY.

Flasheswhenoperationtimeisadded.

Operationtime(×10)

表示切替

Proceedsby1each

Returnsby1each

Returnstodischarge

１

timepressed.

2

timepressed.

リセット

pressure.

b： Interstagepressure(psi)

C：Compressordischarge
temperature(℉)
（122℉）

L： Loadrate（%）

U： Loadcount（×10,000times）

H： Notused(displayonly)

d：Notused(displayonly)

Toshutdownhistorydisplay

IMPORTANT

1. When other than P0.00 is displayed, automatically
returns to P0.00 discharge pressure display in 3 min­utes.

2. Load rate is a reference value determined by com­putation.

When the power is turned on, discharge pressure is displayed

on the screen of the digital monitor. Use the following proce-

dure to switch the digital monitor to other display.

Press the

①

SWITCH DISPLAY

button. Operation time is

then displayed on the screen.

Press the

②

SWITCH DISPLAY

button. Interstage pressure

is then displayed on the screen together with “b.”

③ Press the SWITCH DISPLAY button. Compressor discharge

temperature is then displayed on the screen together with

“C.”

Press the

④

SWITCH DISPLAY

button. Load rate is then dis-

played on the screen together with “L.”

Press the

⑤

SWITCH DISPLAY

button. Load count is then

displayed on the screen in units of 10,000 times together

with “U.”

  Each time the SWITCH DISPLAY button is subsequently

pressed, it continues on to (2) Display of shutdown history

and (3) Monitor display of various settings. To return one

2

item at a time, press

. To return to discharge pres-

sure, press RESET.

● If the alarm or shutdown light is flashing, the shutdown code

is displayed along with “E0” (

page 33, 34).

“E0” indicates the contents of the latest shutdown.

● If the alarm or shutdown light is flashing, it indicates that

the alarm or shutdown has not been reset. Check E0.XX and

reset.

23

3. OPERATING THE DSP [How to Use the Digital Monitor]

(2) How to Display Shutdown History

Use the following procedure to display shutdown history on the

Dischargepressuredisplay

表示切替

Proceedsby1each

Returnsby1each

Returnstodischarge

１

timepressed.

2

timepressed.

リセット

pressure.

SWITCHDISPLAY

１

Press8times.

[Localshutdown]

[1priorshutdown]

XX ： Shutdowncode

［Oldestshutdown］

Historyconsistsof6items.

Notused(displayonly)

screen.

①

② Press the SWITCH DISPLAY button. “E1.” is then dis-

③ Press the RESET Button. The screen then returns to the

Press the

SWITCH DISPLAY

displayed together with the shutdown code (

button 8 times. “E0.” is the

page 33,

34). “0” indicates the latest shutdown. (Automatically chang-

es to “E.0” when shutdown or alarm occurs.)

played along with the shutdown code. “1” indicates shut-

down that occurred previously. Six items of data from 0 – 5

are recorded. “E5” indicates the oldest shutdown.

usual digital monitor display.

IMPORTANT

Notused(displayonly)

If the shutdown code “XX ”is “ ” it means there is no
shutdown history. Also, when anything other than shut­down history is displayed without resetting shutdown,

Todisplayofvarioussettings

it returns to the latest shutdown history in 3 minutes.

(3) How to Display Various Settings (Perform operation only when confirmation is

necessary.)

Dischargepressuredisplay

表示切替

１

Proceedsby1

eachtimepressed.

2

Returnsby1each

timepressed.

リセット

Returnsto

dischargepressure.

SWITCHDISPLAY

１

Press16times.

No.0 ： Controlstatus
A ：  Capacitycontroltype

No.1 ： Startpressure1
100 ： 100psi

No.2 ： Recoverpressure1
087 ： 87psi

No.3 ： Pressuredifferential1
007 ： 7psi

No.4 ： ECOMODE


［Energyconservationmode］

  Decisiontime

No.5 ： Startpressure2
100 ： 100psi

Use the following procedure to display capacity control type

and pressure setting values for confirmation.

Press the

①

SWITCH DISPLAY

button 16 times. “0.A＊＊” is

then displayed on the screen. ＊＊ changes with specifica-

tions. “A” may be “L” or “U” depending on capacity control

specifications.

② Consists of items 0 - 9. Pressure setting status and optional

pressure setting 2 can be confirmed each time the SWITCH

DISPLAY button is pressed.

③ Press the RESET Button. The screen then returns to the

usual discharge pressure display.

24

No.6 ： Recoverpressure2
087 ： 87psi

No.7 ： Pressuredifferential2
007 ： 7psi

No.8 ： Instantaneouspower

interruption(IPI)setting




Invalid

000

：

No.9 ： Compressoraddress
001 ： No.1

IMPORTANT

Symbol displayed at No. 0 and corresponding capacity
control type

A: AUTO function setting
L: Fixed speed type setting
(INTE …Load/unload operation)
U: V type AUTO function off setting

For details on the various types, see pages 20 and 62 - 63.

3. OPERATING THE DSP [How to Use the Digital Monitor]

3.4.2 How to Set Control Functions

■ Various settings (instantaneous power interruption (IPI), remote operation, capacity control

setting, pressure setting, etc.)

Switches display from monitor mode to setting mode (F mode).

リセット

表示切替

Pressandhold
simultaneouslyforat
least3seconds.
Performsame
operationtoreturn.

１

Displays000

ChangeseachtimeFUNCTIONispressed.

th

itemofFmode.

Displayssettingcontents.
F000：（0：Setssingleunitoperation.）

Fordetails,seetheFmodetable.

１

2

Forward

Back

Toaltersettings,changethevalueswiththe

2

１

      buttons.(page26)

F000：（1：Setsmultipleunitcontrol.）

PressENTERtoenterthesettings.

Back

Settings can be altered or entered into the memory from the digital monitor without opening the start panel.

Function

Multiple unit control setting

Instantaneous power inter­ruption (IPI) restart setting

7 segment

display

Item Range

F000 Control setting 0 〜 110

F002

Instantaneous power inter­ruption (IPI) setting

0〜1 1 00：ON、1：OFF

Instantaneous power inter-

F003

ruption (IPI) detection period

1〜511

setting"

Remote control switch
method

Remote operation shut­down recovery

0〜310

0〜1 1 00：Disable, 1：Enable

Remote operation set­ting

F005

F006 Remote operation method 0〜1 1 00：Pulse input, 1：Level input

F007

AUTO setting (＊2) F011 AUTO operation enable 0〜1 1 00：Enable, 1：Disable

Capacity control F018 Control pressure selection 0〜210

Function setting
(optional)

F021 Pressure control mode 0〜210

Note:

※ Setting can be altered at any time other than this.

＊1：When set to 1,” history is cleared. After clearing, the value is automatically reset to “0.”
＊2：Only the V type is equipped with AUTO function. The AUTO function is available as an option for the Fixed speed type.
＊3：Refer to the below chart about the Pressure setting.

Don’t change the setting of digital monitor besides the above parameter F (7 segment display: F

Precision/

unit

Initial value

＊＊＊).

0： Single operation, 1: Multiple unit

control (communication supported)

When IPI is available, Instantaneous
power interruption is detected between
20ms and the setting detection period,
then the compressor restarts.
(

page 25)

0：Panel setting, 1：Local fi xed,
2：Remote fi xed,
3： Remote switch signal

0：Setting 1, 1：Setting 2,
2：External input

0：Built-in sensor, 1：External contact,
2：External input

25

3. OPERATING THE DSP [How to Use the Digital Monitor]

Function

Pressure
setting 1

※

(*3)

psi)

V type

】

125

【

MPa (110

】

0.86

【

0.75

Standard
type

V type

1.0 MPa (145 psi)

Standard
type

Shutdown history clear

Pressure
setting 2

※

(*3)

Pressure
setting 1

※

(*3)

Pressure
setting 2

※

(*3)

Pressure
setting 1

※

(*3)

Pressure
setting 2

※

(*3)

Pressure
setting 1

※

(*3)

Pressure
setting 2

※

(*3)

7 segment

display

F022

F023

F024

F025 (*2)

F031

F032

F033

F034 (*2)

F023

F024

F032

F033

F026

F027

F028

F029

F035

F036

F037

F038

F027

F028

F036

F037

F041 (*1)

Item Range

Control pressure setting 1
(control pressure)

Start pressure 1
(cut out pressure)

Recovery pressure 1
(cut in pressure)

P type recovery pressure 1
(restart pressure)

Control pressure setting 2
(control pressure)

Start pressure 2
(cut out pressure)

Recovery pressure 2
(cut in pressure)

P type recovery pressure 2
(restart pressure)

Start pressure 1
(cut out pressure)

Recovery pressure 1
(cut in pressure)

Start pressure 2
(cut out pressure)

Recovery pressure 2
(cut in pressure)

Control pressure setting 1
(control pressure)

Start pressure 1
(cut out pressure)

Recovery pressure 1
(cut in pressure)

P type recovery pressure 1
(restart pressure)

Control pressure setting 2
(control pressure)

Start pressure 2
(cut out pressure)

Recovery pressure 2
(cut in pressure)

P type recovery pressure 2
(restart pressure)

Start pressure 1
(cut out pressure)

Recovery pressure 1
(cut in pressure)

Start pressure 2
(cut out pressure)

Recovery pressure 2
(cut in pressure)

History Clear 0〜1 1 0 0 : Enter, 1 : History clear

0.5〜0.75 【0.86
(73〜110 【125】)

0.5〜0.77 【0.88
(73〜112 【128】)

0.5〜0.73 【0.84
(73〜106 【122】)

0.5〜0.73 【0.84
(73〜106 【122】)

0.5〜0.75 【0.86
(73〜110 【125】)

0.5〜0.77 【0.88
(73〜112 【128】)

0.5〜0.73 【0.84
(73〜106 【122】)

0.5〜0.73 【0.84
(73〜106 【122】)

0.5〜0.75 【0.86
(73〜110 【125】)

0.5〜0.65 【0.76
(73〜94 【110】)

0.5〜0.75 【0.86

(73〜110 【125】)

0.5〜0.65 【0.76
(73〜94 【110】)

0.5〜1.0

(73〜145)

0.5〜1.02
(73〜148)

0.5〜0.98
(73〜142)

0.5〜0.98
(73〜142)

0.5〜1.0

(73〜145)

0.5〜1.02
(73〜148)

0.5〜0.98
(73〜142)

0.5〜0.98
(73〜142)

0.5〜1.0

(73〜145)

0.5〜0.9

(73〜131)

0.5〜1.0

(73〜145)

0.5〜0.9

(73〜131)

Precision/

】

】

】

】

】

】

】

】

】

】

】

】

unit

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MP
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

0.01MPa
(1.5psi)

Initial value

0.75 【0.86
(110 【125】)

0.77 【0.88
(112 【128】)

0.72 【0.83
(104 【120】)

0.72 【0.83
(104 【120】)

0.75 【0.86
(110 【125】)

0.77 【0.88
(112 【128】)

0.72 【0.83
(104 【120】)

0.72 【0.83
(104 【120】)

0.75 【0.86
(110 【125】)

0.65 【0.76

0.75 【0.86
(110 【125】)

0.65 【0.76

a

(94 【110】)

(94 【110】)

1.0

(145)

1.02

(148)

0.97

(141)

0.97

(141)

1.0

(145)

1.02

(148)

0.97

(141)

0.97

(141)

1.0

(145)

0.9

(131)

1.0

(145)

0.9

(131)

】

】

】

】

Setting can be altered at any time.

※

】

】

】

】

】

】

Setting can be altered at any time.

※

】

】

Setting can be altered at any time.

※

Setting can be altered at any time.

※

●Pressure setting condition

Type Setting condition (Example of Pressure setting 1)

Standard type

V type

①Start pressure (F023) cannot be set below the value of Recovery pressure (F024) (F025) + 3 psi.
① Start pressure (F023) cannot be set below the value of Control pressure (F022) + 3 psi.

② Recovery pressure cannot be set above the value of Control pressure (F022).

Note 1. The higher value, in which value of Recovery pressure (F024) or (F025), becomes the standard type condition ①.

2. The setting condition is same in case of Pressure setting 2 (F031〜F034）.

IMPORTANT

1. Pressure setting
V type: Set pressure differential of start pressure and recovery pressure to a minimum of 7 psi when using a standard receiv-

er. Set Pressure differential of start pressure and control pressure to a minimum of 3 psi.

Fixed speed type: Set pressure differential of start pressure and recovery pressure to a minimum of 15 psi.

2. Function for switching to pressure setting 2 by external pressure alteration input is optional.

26

3. OPERATING THE DSP [How to Use the Digital Monitor]

3.4.3 Alteration of Pressure Setting Values

Pressure
setting1

Pressbutton.

機能

Pressbutton.

記憶

１

Alter
values.

2

Use the following procedure to alter the pressure setting
values for the capacity control system.

① Switch from monitor mode to setting mode (F mode).
② Set PRESSURE SETTING 1 of F mode.

  (For detailed contents of setting specifications, see

page 26.)

  If using pressure setting 2, you must also set pres-

sure setting 2.

For operation method, be sure to refer to the various

settings, and after entering the setting values with the
STORE button, return to the monitor mode.

3.4.4 Capacity Control Mode Setting and
Confirmation

AUTOsetting

機能

Pressbutton.

Pressbutton.

記憶

SettoAUTOOFF.

(Initialvalue0)

１

Alter
values.

2

IMPORTANT

The AUTO function is available for the Fixed speed type
as an option.

3.4.5 Restart for Instantaneous Power
Interruption

運転状況

RUNNINGMODE

遠方

REMOTE

負荷

LOAD

故障

SHUTDOWN

2

電源

POWER

起動待ち

AUTOSTART

運転 停止

START

STOP

UNLOAD STOP

②③

③

You can switch the capacity control mode by the follow­ing method according to the application. The V type is a
automatic stop type, but can also be changed to control
mode that does not stop automatically (AUTO OFF).
Capacity control mode setting can be changed by switch­ing the digital monitor from monitor mode to setting
mode (F mode) while the compressor is not running and
setting to “0: Enable” or “1: Disable” by altering the
AUTO setting (F011) of F mode.

Capacity control mode AUTO ON AUTO OFF

F011 0 : Enable 1 : Disable

Digital monitor display

0．AＸX0．UＸX

After altering, confirm the capacity control mode by dis­play of various settings on the digital monitor (

page

23).
For capacity control operation and details, see pages

(

29 and 62 - 63. Pressure for control can also be
switched by F018 (pressure setting 1 / pressure
setting 2).

The DSP has restart function for instantaneous power
interruption (IPI). When the DSP detects IPI, blinking
the AUTO START Light, the DSP restarts automatically.

① This function is abailable for IPI between 20ms and 5

seconds.

② The DSP stops automatically after detecting IPI and

the OPERATION Light is turned off.

③ After recovering the voltage, the AUTO START Light

blinks and the OPERATION Light turns on.

④ The DSP restarts automatically.

IMPORTANT

(1) Instantaneous power interruption (IPI) means that the

power voltage drops to zero (0) instantaneously.

(2) For the IPI time of less than 20 ms, the DSP air com-

pressor will continue to run.

(3) For the IPI time of more than the setting, the DSP judg-

es it as a power failure; the DSP stops but does not
restart automatically. Press the START button to restart
the DSP air compressor.

27

3. OPERATING THE DSP [How to Use the Digital Monitor]

3.4.6 Remote Operation Setting

(1) Remote setting by instrument panel

On

(2) Remote setting fixed

遠 方

ＲＥＭＯＴＥ

IMPORTANT

● In the case of multiple unit control specifications, when

multiple unit control is set, it automatically changes to
the remote setting. The REMOTE light flashes at this
time.

● Remote operation method alteration in the setting

mode can only be entered when the compressor is not
operating.

● The compressor STOP button can also be used to

stop operation when operating in the remote mode.

Remote
operation
switch
method

On

(3) Remote setting by external operation button

Flashing

Local setting

Off

機能

Pressbutton.

(Initialvalue1)

１

Alter
values.

2

Pressbutton.

記憶

Settoremotefixed.

Operation mode is basically switched by panel operation.
The remote operation mode can also be set by methods
(2) and (3).

① Turn off the main power supply.
② Remove the front cover and remove the start panel

cover.

③ Connect the wiring of the remote control panel and

the compressor control panel.

 (

See the wiring diagrams on pages 51 - 56.)

④ Mount the start panel cover and the front cover.
⑤ Turn on the main power supply.

[1] To “set the operation buttons of the instrument

panel to remote operation mode”

① Press the REMOTE button.
② The REMOTE light lights to indicate that operation of

the instrument panel buttons is set to the remote
operation mode.

③ To return to local operation mode, press the

REMOTE button again. The REMOTE light then
goes off to indicate that operation has been switched
to the local operation mode.

[2] To “fix remote operation to remote operation

mode”

① Switch from the monitor mode to the setting mode (F

mode).

② Change the remote operation switch method for

remote operation setting (F005) from “0: Panel set-
ting” to “2: Remote fixed.”

③ The REMOTE light lights to indicate that the remote

operation mode has been set.

[3] To “set to remote operation by operation button

provided externally”

(Consult with your dealer or the Hitachi Service

Station.)

① Wire the external remote setting buttons.
② Switch from the monitor mode to the setting mode (F

mode).

③ Change the remote operation switch method for

remote operation setting (F005) from “0: Panel set-

ting” to “3: Remote switch signal.”

28

④ Set the external remote setting button to “ON.”
⑤ The REMOTE light flashes to indicate that the opera-

tion mode has been switched to remote operation by
external buttons.

3. OPERATING THE DSP [How to Use the Digital Monitor]

3.4.7 Pressure Setting Switch Function

According to alteration of the pressure setting value of
section 3.4.1, by setting start pressure 2 (value of F032)
and recovery pressure 2 (value of F033), the control
setting can be easily switched by external button opera­tion in accordance with usage time on the load side.
During ordinary control, the LOAD light is lit when load­ing and goes off when unloading. With pressure setting
2, however, the light flashes when loading and goes off
when unloading.
For details, refer to page 24. (The ECOMODE however
cannot be used with pressure setting 2.)

Energy Saving Effect

Start
pressure 1

Start
pressure2

Recovery
pressure 1

Recovery
pressure2

Line pressure

Load light

External pressure setting switch

Load Unload

Ordinary (on range)

※Start pressure = Cutout pressure
※Recovery pressure = Cutin pressure

Pressure setting 2 selection (flash range)

ONOFF

Time

3.4.8 Capacity Control Flow when ECOMODE (Energy Saving Mode) is Set

(ECOMODE is set to off when shipped from the factory, but may be set according to your needs.)

Execute capacity control in accordance with the following
time charts.

(1) ECOMODE (Energy Saving Mode) setting

When you set to ECOMODE by load/unload type con-

trol, if the cycle time for load → unload exceeds 30
seconds, the start pressure setting is automatically
lowered until it reaches recovery pressure + 0.05
MPa to conserve energy.

If 30 seconds is exceeded, the DISPLAY SWITCH /

WIDE MODE light flashes; if 30 seconds is not
exceeded, the DISPLAY SWITCH / WIDE MODE
light lights steadily, and control is executed by pres­sure setting value of ordinary load/unload type con­trol.

When using ECOMODE (Energy Conservation

Mode), “ECO” is displayed on the monitor screen.

page 14)

(

運転管理

ＲＵＮＮＩＮＧ  ＣＯＮＴＲＯＬ

警 報

ＡＬＡＲＭ

機 能

リセット

ＲＥＳＥＴ

ＦＵＮＣ

遠 方

ＲＥＭＯＴＥ

記 憶

ＳＴＲ

Energy Saving Effect

Start pressure

(Unload start pressure)

表示切替／

ワイド モー ド

ＳＥＬＥＣＴ／ＷＩＤＥ

１

表示切替／

ワ イドモ ード
ＳＥＬＥＣＴ ／ ＷＩＤＥ

ON ： Light flashes.
OFF ： Light goes off.

表示 切替／ワイドモード

Set by button

１

Start pressure

is automatically

reduced.

(2) Precautions when using ECOMODE (Energy

Saving Mode)

Enabling ECOMODE (Energy Conservation Mode)

requires an air tank that is one turn larger that the air
tank recommended for load/unload type control.

For information concerning the air tank, see

(
page 41.)

This function is used for load/unload type control, and

operates only for the ordinary pressure setting.

Recovery pressure

(Load recovery pressure)

Line pressure

Load Unload

Time

※Start pressure = Cutout pressure
※Recovery pressure = Cutin pressure

Factory set upper/lower limit pressure differential
ECOMODE differential pressure

: 15 psi
: 7 psi

Start pressure is automatically reduced to 1 cycle per 30 seconds.

29

3. OPERATING THE DSP [Daily Operation]

3.5 Daily Operation

CAUTION

● When using the DSP air compressor, do not raise the discharge pressure excessively. Operating the

DSP air compressor over the rated pressure can result in main motor overload, shutdown of the
airend and/or damage of parts.

● If the safety relief valve has blown or a protective device has shutdown the DSP air compressor,

investigate the cause of and take corrective action. If there any questions or comments in taking these
actions, please contact the local Hitachi distributor.

3.5.1 Preparing the DSP Air Compressor

②

③

運転管理

ＲＵＮＮＩＮＧ ＣＯＮＴＲＯＬ

警 報

ＡＬＡＲＭ

機 能

リセット

ＲＥＳＥＴ

ＦＵＮＣ

遠 方

ＲＥＭＯＴＥ

記 憶

ＳＴＲ

表示切替／

ワイドモード
ＳＥＬＥＣＴ／ＷＩＤＥ

１

運転状況

ＲＵＮＮＩＮＧ ＭＯＤＥ

遠 方

ＲＥＭＯＴＥ

負 荷

ＬＯＡＤ

故 障

ＳＨＵＴＤＯＷＮ

運 転

ＳＴＡＲＴ

２

電 源

ＰＯＷＥＲ

起動待ち

ＡＵＴＯ ＳＴＡＲＴ

停 止

ＳＴＯＰ

UNLOAD STOP

① Turn on the main power supply.

– STOP lamp on the add-on reactor starer panel glows for

reactor starting model.

– Power lamp glows for −△ starting model.
② Check the POWER light and LCD monitor display.

– Is the light lit ?

– Is the monitor screen displayed on the LCD monitor?
③ Check the level of lubricating oil.

– Is the oil level near the red line ?

④ Set the water drainage cock valve of the cooling water

piping and the water drainage cock on the back of the
compressor to “fully closed.”

⑤ Allow cooling water to pass through.

IMPORTANT

Make sure the oil level of the lubricating oil is between the
red lines while the compressor is running. Because lubri­cating oil is circulated through the cooler and the piping
while the compressor is running, the position when the
compressor is running and when it is off differs, and is
higher when the compressor is not running.

3.5.2 Starting the DSP Air Compressor

②

30

①

警 報

DIS.PRESS：１１０ｐｓｉ

INTSTG.P：２２ｐｓｉ
OILPRESS：２２ｐｓｉ
CLTPRESS：＊＊＊ｐｓｉ

③④

運転管理

ＲＵＮＮＩＮＧ ＣＯＮＴＲＯＬ

ＡＬＡＲＭ

機 能

リセット

ＲＥＳＥＴ

ＦＵＮＣ

表示切替／

遠 方

ワイドモード

ＲＥＭＯＴＥ

ＳＥＬＥＣＴ／ＷＩＤＥ

記 憶

ＳＴＲ

１

運転状況

ＲＵＮＮＩＮＧ ＭＯＤＥ

遠 方

ＲＥＭＯＴＥ

負 荷

ＬＯＡＤ

故 障

ＳＨＵＴＤＯＷＮ

運 転

ＳＴＡＲＴ

２

電 源

ＰＯＷＥＲ

起動待ち

ＡＵＴＯ ＳＴＡＲＴ

停 止

ＳＴＯＰ

UNLOAD STOP

① Open the discharge side valve.

② Start operation by pressing the START button.

– START lamp on the add-on reactor starter panel glows for

reactor starting model.

  – START lamp glows for −△ starting model.

③ Check the pressure after the compressor starts up.

– The compressor stops running if the oil pressure does not

 

rise to at least 12 psi.

  – The compressor switches to full load operation within 15

seconds for the

for the reactor starting model.

−△ starting model and within 8 seconds

④ Make sure the discharge pressure rises gradually.

– Make sure the maximum pressure does not exceed the spec-

 

ified discharge pressure.

3.5.3 During Operating the DSP Air Compressor

運転管理

自動

AUTO

モニタ

MONITOR

メニュー

MENU

＋／−

UP/ 
DOWN

設定

MONITOR

㻞㻜㻜㻥䠋㻜㻠䠋㻝㻟 㻝㻥䠖㻜㻞

㻼㻾㻱㻿㻿㼁㻾㻱

㻵 㻺 㼀㻿 㼀 㻳䠊㻼 䠖 㻌 㻌 㻞 㻥 㼜 㼟 㼕
㻻 㻵 㻸 㻌 㻼㻾㻱㻿 䠖 㻌 㻌 㻝 㻡㼜 㼟 㼕
㻯㻸 㼀䠊㻼㻾㻱 㻿䠖 㻖䠊 㻖 㻖 㼜 㼟 㼕
㼀㻱㻹㻼㻱㻾㻭㼀㼁㻾㻱
㻰㻵 㻿䠊㼀㻱㻹㻼㻝䠖 㻟㻞㻜䉣
㻰 㻵 㻿䠊 㼀㻱㻹㻼 㻞 䠖 㻟
㻻 㻵 㻸 㻌 㼀 㻱㻹㻼 䠖 㻟㻢 䉣
㻯㻸㼀䠊㼀㻱㻹㻼䠖 㻖㻖㻖䉣
㻞㻺㻰 㻌 㻿㼁㻯 㼀䠊㼀䠊 䠖 㻜 㻤 䉣

㻹㻭 㻵 㻺㼀 㻱㻺 㻭㻺㻯 㻱

㻴㻾䠊㼀㻻㻌㻹㻭㻵 㻺㼀䠖 㻜㻜㻜㻜䡄

㻺㻱㼄㼀㻌 㻹㻭 㻵㻺㼀䠖 㻖㻖㻖㻖

SET

RUNNINGCONTROL

警報

ALARM

機能

FUNC

リセット

RESET

遠方

記憶

STR

［×10h］

表示切替/

ワイド モード
SELECT/WIDE

1

㻝

㻝

運転状況

RUNNINGMODE

遠方

REMOTE

負荷

LOAD

故障

SHUTDOWN

2

㻟㻤䉣

電源

POWER

起動待ち

AUTOSTART

運転 停止

STARTREMOTE

STOP

UNLOAD STOP

3. OPERATING THE DSP [Daily Operation]

① Check the LCD for operating pressures and tempera-

tures, and verify that:

– Discharge air pressure, interstage air pressure, oil pressure,

discharge air temperature, 2nd-stage suction air temperature,

and oil temperature stay within a normal range; see page 45

② Make sure air containing drain from the inter cooler

drain discharge port and after cooler drain discharge
port is intermittently discharged.

3.5.4 Stopping the DSP Air Compressor

④

③

ＲＵＮＮＩＮＧ ＣＯＮＴＲＯＬ

警 報

ＡＬＡＲＭ

機 能

DIS.PRESS：０００ｐｓｉ

NTSTG.P：０００ｐｓｉ
OILPRESS：０００ｐｓｉ
CLTPRESS：＊＊＊ｐｓｉ

②

運転管理

リセット

ＲＥＳＥＴ

ＦＵＮＣ

遠 方

ＲＥＭＯＴＥ

記 憶

ＳＴＲ

①

表示切替／

ワイドモード
ＳＥＬＥＣＴ／ＷＩＤＥ

１

運転状況

ＲＵＮＮＩＮＧ ＭＯＤＥ

遠 方

ＲＥＭＯＴＥ

負 荷

ＬＯＡＤ

故 障

ＳＨＵＴＤＯＷＮ

運 転

ＳＴＡＲＴ

２

電 源

ＰＯＷＥＲ

起動待ち

ＡＵＴＯ ＳＴＡＲＴ

停 止

ＳＴＯＰ

UNLOAD STOP

① Press the UNLOAD STOP button. The compressor

then unloads for 5 minutes and then stops running.

(In the case of an emergency, press the STOP but-

ton.)

– STOP lamp on the add-on reactor starter panel glows for

reactor model.

② Check the LCD for pressures, and verify that:

– Oil pressure, interstage air pressure, 0 psi (or 1.5 psi depend-

ing on your operating conditions)

.

③ Check the condensate drain discharge from the con-

trol line filter by checking the sight glass on the con­trol line filter.

④Close the discharge stop valve.

⑤ Stop the cooling water.

Open the valve for draining water in the cooling water

piping and drain the cooling water.

To avoid damaging the casing and cooler, be careful

not to allow freezing during the winter.

31

3. OPERATING THE DSP [Oil Mist Remover Daily Operation, Adjusting the DSP]

3.6 Oil Mist Remover Daily Operation

3.6.1 When Starting

8

φ

Pressure Gauge

51 to 58 psi

Make sure that the pressure
gauge reads as follows:

Make sure that the
condensate is not

Make sure that the vacuum
indicator does not show a
red mark.

Condensate Drain Cock

3.6.2 When Stopping

collected in the
filter bowl.
If the condensate is
collected, push up
the cock to drain
the condensate.

② The first steps to resolve the lower suction vacuum

pressure are as following.
A) Clean or replace the air intake filter.
B) Clean the suction throttle valve’s valve plate.
Note; If the unloaded interstage pressure drops as

low as -0.08MPa (-12 psi), discharge air tem­perature will gradually increased.

③ If the DSP air compressor cannot be shutdown to

clean these parts, turn the adjusting bolt (the suction

bypass valve) counterclockwise to open. This will

allow the air intake and increase the discharge air

pressure to be geater than -0.08 MPa (-12 psi) when

running unloaded.
④ Replace the consumable parts in the air intake filter

and suction throttle valve with new consumable parts

in accordance with the appropriate maintenance

schedule.

For the detail refer to the section 9,

Maintenance the DSP.

IMPORTANT

If the discharge pressure becomes lower than -0.08 MPa (-12
psi) during unload operation, shaft sealing function decrease.

3.7.2 Regulating the Oil Pressure

① Make sure that the vacuum indicator shows a red

mark.

② Verify that the pressure gauge reads 0 (zero).

3.7 Adjusting the DSP

3.7.1 While Operating the DSP Air Compressor

②④

Air Intake Filter

① When dust particles accumulate on the valve plate of

the suction throttle valve, the suction vacuum pres­sure may drop and eventually causing the discharge
air temperature to rise.

①④

Suction Throttle
Valve

Seal Washer

Locknut

③

Adjusting Bolt
(Suction Bypass Valve)
Usually keep the bolt
tightened, but not excessively.

Relief Valve

① Use the relief valve to regulate the oil pressure. To

regulate the oil pressure, open the relief valve cap,

loosen the lock nut, and turn the regulating bolt to

keep the oil pressure at the specified 0.12 to 0.16 MPa

(17 to 23 psi).
・0.12 to 0.16 (17 to 23 psi) when the ambient temper-

ature is 20 degree C or higher.

・0.14 to 0.18 (20 to 26 psi) when the ambient temper-

ature is 20 degree C or lower.

(for V type, adjust at the maximum operating frequency.)
② Turn the regulating bolt clockwise to increase the oil

pressure and vice versa.
③ Tighten the locknut and replace the cap.

IMPORTANT

If the oil pressure is reduced to 0.08 MPa (12 psi) or lower, the oil
pressure sensor will detect it and shut down the DSP air compressor.

32

4. TROUBLESHOOTING

CAUTION

If an alarming trouble or a shutdown trouble has happened, investigate the cause and take a corrective
remedy before restarting.
If you have anything unclear or any question, please contact the local Hitachi distributor.

4.1 Protective Devices

The DSP is provided with the protective devices as listed below. Shutdown troubles and alarming troubles detected by
these protective devices are indicated on the liquid crystal display (LCD). Referring to the LCD indications, investigate the
cause of a shutdown or alarming trouble.

■ When Connecting the power

Heading

PROBREM

LCD Indication

Trouble Description

Reversal phase connection

Phase-lacking connection

Short period Power Interruption

Instantaneous Power Interruption

What and

How to Detect

Detected for 3
seconds after
connecting the power

Black out for 1 to 5 seconds

Black out for less than 1 seconds

SHUTDOWN

MODE Light

Blinks
in red

−

Detector

CPU Yes Change 2 of 3 wires of the power cord.

CPU Yes

CPU No

CPU No

Shutdown

What Actions to Take

Reconnect the power cord tightly, check the
power supply, and take a corrective remedy.

See page for Power Interruption detection

See page for Power Interruption detection

How to

Reset

Press RESET
button.

Press RESET
button.

−

History

Code

01

02

03

04

■ During Operation

LCD Indication

Heading

SHUTDOWN

FAILURE

INVSTOP

Trouble Description

Discharge air tem­perature (1)

Discharge air tem­perature (2)

Interstage pressure

2nd-stage suction air
temperature

Oil temperature

Oil pressure
[Fixed speed]

Oil pressure
(OIL-LOW PRESS)

Overloading
(main motor)

Overloading
(ancillary motor)

Answer error of 52

Answer error of 42

Inverter tripping or main
motor overloading with
automatic retrials.

What and

How to Detect

The temperature detected
at 1st stage rises above
the below settings.

Warning seeting＋5℃(＋41℉)

The temperature detected
at 1st stage rises above
the below settings.

Warning seeting＋5℃(＋41℉)

0.27MPa (39psi) or higher

70℃ (158℉) or higher

(after the intercooler)

70℃ (158℉) or higher

0.08MPa (12psi) or lower

Oil pressure descends
under below settings.

Freg. 45Hz
or higher

Freg. less
than 45Hz

Detected during oper­ation

Detected during oper­ation

Detected during

running.

Detected after shifting
to △ running.

Failure signal from
inverter

0.08MPa
(12psi)

0.04MPa

(6psi)

SHUTDOWN

MODE Light

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Detector

Thermistor Yes See page 35

in red

Thermistor Yes See page 35

in red

Pressure sensor

in red

Thermistor Yes See page 35

in red

Thermistor Yes See page 35

in red

Pressure sensor

in red

Pressure sensor

in red

Thermal relay

in red

Thermal relay

in red

in red

in red

in red

CPU

CPU

CPU

Shutdown

Failure
stop after
repetition
of retrials.

What Actions to Take

Yes See page 35

Yes See page 35

Yes See page 35

Yes See page 35

Yes See page 35

Yes See page 35

Yes See page 35

See page 35

How to

Reset

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

History

Code

55

56

52

5B

58

5C

5C

17

53

51

16

44

33

4. TROUBLESHOOTING [Protective Devices]

■ Others

LCD Indication

Heading

ALARM

PROBLEM

FAILURE

Trouble Description

Clogging of air
intake fi lter

Discharge air
temperature (1)

Discharge air
temperature (2)

2nd-stage suction air
temperature

Oil temperature

Oil pressure
[Fixed speed]

L. COUNT OVER
( Load/unload cycle

count)

Battery out Battery voltage low

Error of a scheduling
operation

Error of a multiple­unit operation

Error of RS−485C
port

Error of RS−485
port

PCB error

CT error Disconnected

Pressure sensor
(disconnection 1)

Pressure sensor
(disconnection 2)

Pressure sensor
(disconnection 4)

Temperature sensor
(disconnection 2)

Temperature sensor
(disconnection 3)

Temperature sensor
(disconnection 4)

Temperature sensor
(disconnection 5)

What and

How to Detect

Pressure differential of

−4.98kPa (0.7psi) or more

The temperature detected
at 1st stage rises above
the below settings.

NOTE 5)

The temperature detected
at 2nd stage rises above
the below settings.

NOTE 5)

63℃ (145℉) or higher
(after the intercooler)

63℃ (145℉) or higher

0.10MPa (15psi) or
lower

1 million times

Start/stop time not set
yet

Setting error

Setting error

Setting error

(ROM1) (RAM1)
MAIN Memory failed

(ROM2) (RAM2)
LCD Memory failed

PS1 disconnected (sensor
for interstage pressure)

PS2 disconnected (sensor
for discharge air pressure)

PS4 disconnected (sensor
for Oil pressure)

TH2 disconnected (thermistor
for interstage temperature)

TH3 disconnected (thermistor for
2nd-stage discharge temperature)

TH4 disconnected (thermistor for
1st-stage discharge temperature)

TH5 disconnected
(thermistor for oil temperature)

NOTES:

 1. Both the DSP for a 400 V class power supply and the DSP with a control circuit of 100 volt employ a reversal phase relay.

 2.

Both the DSP for a 400 V class power supply and the DSP with a control circuit of 100 volt indicate a phase-lacking connection as a reversal phase.

 3. Battery Replacement:

Replace the battery with a new one every 6 years. When replacing, disconnect the power and complete the replacement work within 15 minutes.

 4. If a Thermistor is disconnected, an override operation is not allowed. Contact your distributor immediately.

 5. Refer the normal indication value of devices in the coution decal on the front panel of the unit for the setting values of waring.

SHUTDOWN

in green

in green

in green

in green

in green

in green

in green

in green

in green

in green

in green

in green

Detector

MODE Light

Pressure

Blinks

differential

sensor

Blinks

Thermistor No See page 35

Blinks

Thermistor No See page 35

Blinks

Thermistor No See page 35

Blinks

Thermistor No See page 35

Blinks

Pressure sensor

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks

Blinks
in red

Blinks
in red

Blinks
in red

Blinks
in red

Blinks
in red

Blinks
in red

Blinks
in red

Blinks
in red

Blinks
in red

Blinks
in red

CPU No

CPU No

CPU No Check the operation setting.

CPU No

Thermistor Yes

Pressure sensor

CPU Yes

CPU Yes

CPU Yes

CPU Yes

CPU Yes

CPU Yes

CPU Yes

CPU Yes

CPU Yes

CPU Yes

Shutdown

Yes See page 35

Yes

What Actions to Take

No See page 73

Replace suction throttle valve consum­able parts and Blow off solenoid valves

Disconnect the power, and replace the
battery with a new one.

Check the wire and the operation
setting.

Check the wire and the operation
setting.

Check the wire and the operation
setting.

Disconnect and reconnect the power. If the
problem is reproduced, change the PCB.

Disconnect and reconnect the power. If the
problem is reproduced, change the PCB.

Disconnect the power and check the
CT sensor wire for tightness.

Disconnect the power and check the
pressure sensor wire for tightness.

Disconnect the power and check the
thermistor sensor wire for tightness.

How to

Reset

Press RESET
button.

Automatically
reset.

Automatically
reset.

Automatically
reset.

Automatically
reset.

Press RESET
button.

Hold the REMOTE
Button and SELECT/
WIDE Button for
at lease 7 seconds

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

Press RESET
button.

History

Code

21

25

26

2B

26

2C

59

64

62

5B

63 65

〜68

63 65

〜68

43

47, 48

41, 42

46

E10

33

34

39

32

35

36

37

34

4. TROUBLESHOOTING [Troubleshooting the Air Compressor]

4.2 Troubleshooting the Air Compressor

Most likely problems, causes, and remedies are described below.

Causes LCD Indication Causes Corrective Remedies

The DSP motor
does not start.

＜P R O B L E M＞

CONNECTION ERR： REV

RES

Press

＜P R O B L E M＞

CONNECTION ERR： OPEN

Press

after CHK.

RES

after CHK.

1. Power supply switch - Off

2. Power - Failed

3. Power cord - In a reversal phase
connection

4. Power cord - In a phase-lacking
connection

1. Check the main breaker.

2. Check the power supply.

3. Change 2 of 3 wires of the power
cord.

4. Reconnect the power cord tightly and
check the power supply.

NOTE: Phase-lacking is detectable only

when connecting the power.

Shutdown –
1st-stage dis­charge air tem­perature and/ or
pressure too high

Shutdown –
2nd-stage dis­charge air tem­perature too high

Shutdown –
2nd-stage suction
air temperature
too high

Shutdown –
Oil temperature
too high

Shutdown –
Oil pressure too
low

＜A L A R M＞

DIS. TEMP.1：

RES

Press

＜S H U T D O W N＞

HIGH DIS. TEMP：

Press

＜A L A R M＞

DIS. TEMP.2：

Press

＜S H U T D O W N＞

2ND SUCT. TEMP：

Press

＜S H U T D O W N＞

OIL ： HIGH TEMP

Press

＜S H U T D O W N＞

OIL ： LOW TEMP

Press

after CHK.

RES

after CHK.

RES

after CHK.

RES

after CHK.

RES

after CHK.

RES

after CHK.

1. 2nd-stage AIR END air intake effi ­ciency - Lowered

2. Air intake fi lter - Dirty

3. Temperature of Suction Air-High

1. Check valve – Compressed air
leaked (from the aftercooler to the
air end when the DSP unloads)

2. Suction throttle valve - Dirty

1. Cooling water pump – Failed, or
Cooling water pressure – Fluctuating

2. Intercooler – Dirty

1. Oil cooler – Dirty

2. Room temperature – High

3. Oil temperature control valve –
Failed

1. Oil strainer and/or oil fi lter – Dirty

2. Oil level – Low

1. Contact your Hitachi distributor.

2. Clean the air intake fi lter.

3. Lower the suction air temperature.

1. Replace the check valve.

2. Clean the Suction throttle valve.
Note: For information about the Suction

bypass valve, see page 29.

1. Check the cooling water system.

2. Clean the intercooler

1. Check the oil cooler.

2. Reduce the room temperature.

3. Check the oil temperature control
valve.

1. Clean the oil strainer

2. Replace the oil fi lter.

3. Add the oil.

Shutdown –
Main motor and/
or ancillary motor
overloading

Shutdown

–
Inverter tripping/
restarting

＜S H U T D O W N＞

OVERLOAD ： MAIN

RES

Press

＜S H U T D O W N＞

OVERLOAD ： SUB

Press

＜F A I L U R E＞

SYSTEM RETRY ：

after CHK.

RES

after CHK.

1. Power supply voltage – Low

2. Discharge air pressure – Too high

1. Power supply voltage – Low

2. Cooling fan motor – Failed

1.

Power supply voltage – Low or in unbalance

2. Discharge air pressure – Too high

3. Main motor – Overloading

NOTE:‘ INVERTER RESTART’ means that the DSP

shutdowns when the inverter repeats a
restarting action within 1 minute.

1. Rectify the power supply voltage.

2. Check the suction throttle valve

3. Check the capacity control system.

1. Rectify the power supply voltage.

2. Check the cooling fan motor.
(Measure insulation resistance etc.)

1. Rectify the power supply voltage.

2. Check the capacity control system.

3. Measure insulation resistance etc. or
check the main motor.

35

4. TROUBLESHOOTING [Troubleshooting the Oil Mist Remover]

4.3 Troubleshooting the Oil Mist Remover

① The vacuum indicator shows a red mark (Gear case has a positive internal pressure)

The pressure gauges reads zero (0) MPa (psi). Check the solenoid valve for operation.

No

Pressure setting of the regulator is lower ?

No

Pressure of a control air is lower than 0.39 MPa (56 psi) ?

No
The gear case or gear case vent pipe has a leak
(for example, the oil fi lling port plug on the gear case is not tight).

No
Element may be dirty.
Inspect the element and replace if necessary.

② The safety relief valve has opened and oil mists are vented (the gear case internal pressure has risen).

See the NOTE below.

Yes

Yes

Yes

Yes

Reset the regulator to a proper pressure.
Clean the fi lter.

Maintain the pressure of a control air at 0.39 MPa (56 psi) or more.

･ Tighten every screw and plug to remove all leaks.
･ Make sure that the safety relief valve is closed.

The safety relief valve is dirty or stuck open by a foreign
object.

No
Go to the procedure ①. The vacuum indicator shows a
red mark. (Gear case has a positive internal pressure.)

NOTE:
The safety relief valve opens immediately when starting the DSP (the control air pressure is still low) or when the DSP has
stopped. This is a normal occurrence.

Yes

Disassemble and clean the safety relief valve.
Replace if necessary.

③ Oil is vented through the ejector’s compressed air outlet (the separated oil is not being recovered).

Accumulated oil is visible in the tube between the ele­ment housing and the fl oat trap.

No

Upper or lower packing is not seated properly on the
element ?

No

Control air contains oil ? Check the control air for oil contents.

No

Element may be dirty.
Inspect the element and replace if necessary.

Yes

Yes

Yes

Clean the nozzle of the fl oat trap.

Reinstall the element, seating the packing properly for a
maximum sealing performance.

④ Oil pressure is low (oil pump may be inhaling air).

Has the air compressor developed an alarm or shutdown
trouble (i.e. oil fi lter dirty, oil pressure reduced due to oil
leaking, oil pump failed, safety relief valve failed, etc.)?

No

The nozzle of the fl oat trap is clogged (for example, a
large quantity of air is inhaled through the oil recovery
pipe to the oil pump inlet)?

NOTE:
The oil mist remover makes the gear case internal pressure negative during operation, reducing the pressure by 0.005 to 0.01
MPa (0.7 to 1.5 psi). This is not unusual; reset the oil pressure on the safety relief valve.

Yes

Yes

Readjust or repair as required.

Clean the nozzle of the fl oat trap. Disassemble the fl oat
trap and clean.

36

5. INSTALLING AND PIPING THE DSP

5.1 Unpacking the DSP Air Compressor

■ After unpacking the crate, verify that the inside DSP is what you have ordered, by referring to page 81 through 82
“STANDARD SPECIFICATIONS and also by checking the model nameplate.

■ Verify that the DSP is not damaged or deformed in transportation.

Model Nameplate

Motor Output (kW)

Model

Frequency (Hz)

Standard Accessories

Foundation Bracket 4 pieces
Foundation Bolt/Nut (M24) 4 pieces
Bolt (M24) for Foundation Bracket 4 pieces
Fork Slot Cover 4 pieces
Bolt (M6) for Fork Slot Cover 8 pieces
R-NPT Nipple (1/4B) 2 pieces
R-NPT Nipple (3/8B) 2 pieces
R-NPT Nipple (1/2B) 2 pieces
R-NPT Nipple (3/4B) 3 pieces
Gasket 1 pieces
Handle 1 pieces
Motorized Isolation Valve（※） 1 piece
Motorized Water Isolation Valve（※） 1 piece

Item ※-marked shall be supplied only for

5.2 Conveying the DSP Air Compressor

■ With a Forklift ■With a Shop Crane

Pad

Use a pad to protect
the DSP enclosure
panels.

Keep the distance of
1500 mm (60 inches)
or more.

Use the strong wires.
Adjust the wire length to
keep the DSP’s balance
when hoisting it.

Model Total Mass

DSP-132WN
DSP-145WN
DSP-160WN

DSP-200WN
DSP-240WN

3,800 kg

(8,378 lb)

4,800 kg

(10,582 lb)

Model Total Mass (kg)

DSP-160VWN

DSP-240VWN

4,000 kg

(8,819 lb)

5,100 kg

(11,244 lb)

Use the adhesive tapes
to prevent the front door
from detached during
conveyance.

Use a pad to protect the
DSP enclosure panels.

Use the attached
tie frame.

■ After installing the DSP, plug the fork slots with the fork

slot covers.

Common Base

Fork Slot Cover

Bolt (M6×15)

37

5. INSTALLING AND PIPING THE DSP [Installing the DSP Air Compressor]

5.3 Installing the DSP Air Compressor

WARNING

1. Keep flammable solvents or any other hazardous chemicals away from the DSP. Such chemicals may be
sucked by the air end, compressed, and exploded.

2. Do not use fire near the DSP; otherwise the sparks may enter the air end and burn it internally.

■ Install the DSP in a bright, wide, and airy room as follows:

Ventilating Fan

If you install the DSP in a
small room, provide a
ventilating fan to keep the
room temperature at 40℃
(104℉ ) or lower.

Piping and
Maintenance Space

Keep a space of 1.0 m (39
inches) or more to connect
a plant airline pipe and
ease the maintenance
servicing.

Plug the fork slots with
the fork slot covers
(standard accessory)

Maintenance Space

Keep a space of 1.5 m (59 inches) or
more to allow opening the front door.

■ Install the DSP in a dry and dust-free room, and avoid the following.

Raindrops, Basements, Steam

Metals, Sand, Other Hard Materials

Air Intake Maintenance Space

Keep a space of 1.5 m (59 inches) or
more. Note that the air intake grill is
located on the rear enclosure panel.

Foundation

Provide a vibration-absorbing mat if
the foundation is vibrative. If it is too
vibrative, look for another dequate
location.

Maintenance Space

Keep a space of 0.8 m (31 inches) or
more to connect the discharge
compressed air piping and for ease of
maintenance.

Harmful Gases

Chlorine, hydrogen sulfide, sulfurous acid, highly

concentrated ozone, and ammonium gases

（）

These conditions may cause leakage,
condensation, rusting and CPU mal­function.

■ Install the DSP on a level floor. ■

Installing on a level floor is required to keep an
adequate amount of lubrication oil in the DSP
and prevent excessive noise and vibration.

These conditions may cause deterio­ration of motor insulation level, dam­age to the air end bearings and CPU
malfunction.

Prohibited

Do not set the DSP
on the blocks.

CAUTION

These conditions may cause oil deterio­ration, corrosion of coolers and peeling
of the rotor coatings.

Do not install the DSP near a wall. Doing

this may cause the operating sound to
resonate and increase the sound levels.

● Install the DSP indoors. Installing it outdoors may lead to a damage of the air end due to water vapor,

dust, etc.

● The DSP installation room must have an air intake opening and an air exhaust opening and must be

well ventilated. If the room is poorly ventilated, hot air exhausted by the DSP may cause the room
temperature to rise abnormally and in the worst case lead to damage of the air end.

38

Condensate Drain Valve

5. INSTALLING AND PIPING THE DSP [Piping the DSP Air Compressor]

5.4 Piping the DSP Air Compressor

5.4.1 General Instructions

① Use the degreased pipe as a plant airline pipe.

② If you connect the DSP directly to a gas pipe, use a

union or flange joint to ease disassembling the DSP
enclosure panels.

Flange Joint

③ If a plant airline pipe is longer, use a larger diameter

pipe taking into consideration the pressure loss
through the pipe.

④ If there is a concaved or upright part in a plant airline

pipe, provide a condensate drain valve at its bottom.

Stop Valve

⑦ If you connect the DSP’s discharge pipe to a main plant

airline pipe, run the discharge pipe upwards and then
downwards before joining to the main plant airline pipe,
to prevent the condensate from flowing back.

Main Plant
Airline Pipe

From the DSP

5.4.2 Two-Unit Parallel Piping / Operation

Motorized isolation valve
(VSD only)

Opened

Operating DSP

Stop Valve

Discharge

Air

Air Receiver Tank

IMPORTANT

Prevent the condensate from flowing back from the main
plant airline pipe.

⑤ Install a discharge stop valve on a plant airline pipe

near the DSP.

⑥ If you want to elevate a plant airline pipe near the

DSP, keep a space of 500 mm (20 inches) between
the elevated pipe and the DSP enclosure panel to
ease the maintenance servicing.

500mm or more
(50 inches)

Stop Valve

Motorized isolation valve
(VSD only)

Non-Operating DSP

Closed

If you operate only one of the two or more DSPs, keep
fully closed the discharge stop valve of the non-operating
DSP.
If you operate the two DSPs alternately and automatical­ly, use an electric-driven or any other automatic stop
valve, one that can be automatically closed when the cor­responding DSP has stopped.
If you use a solenoid valve as an automatic stop valve,
consult your Hitachi distributor.

A motorized isolation valve is included as a standard
accessory. Arrange for the motorized isolation valve
to be “closed” while the compressor is stopped.
If not using the motorized isolation valve, when oper­ating one side, provide a stop valve for the discharge
piping of the compressor that is not running and close
it completely.

IMPORTANT

Assume that one DSP is operating and another is not. In
case that the discharge stop valve of the non-operating
DSP is opened, a back pressure is applied on that DSP ’s
aftercooler, check valve, etc. As a result the condensate is
produced much more than otherwise; even the Aftercooler
is rusted internally and the check valve is earlier rusted.

39

5. INSTALLING AND PIPING THE DSP [Piping the DSP Air Compressor]

5.4.3 Motorized Isolation Valve

Discharge

Pressure detecting pipe
(for VSD control model or Auto option)

Stop Valve

Motorized
isolation valve

Air Receiver Tank

The V type is equipped with an AUTO operation as a
standard function, and gets its structure from the second­ary side of the motorized isolation valve.
Mount the pressure detecting pipe (customer supplied)
and motorized isolation valve (standard accessory).
Connect the pressure detecting pipe from the position on
the upper pipe, which is as close as possible to the sec­ondary side of the motorized isolation valve, to the
receiver pressure detecting port of the compressor.
Also, avoid operating the equipment without mounting
the pressure detecting pipe. The safety valve actuates
because pressure is not detected.

Air

5.4.4  Parallel Piping / Operation with a
Reciprocating Compressor

Stop Valve

IMPORTANT

(1) This is to prevent the reciprocating compressor’s air

pulsation from affecting the DSP.

(2) Usually, continue to operate the DSP as long as possi-

ble and start and stop a reciprocating compressor in
parallel as required by the compressed air demand.

Check Valve

Discharge Air

Stop Valve

Connect the DSP’s
discharge pipe to the
secondary part of the
air receiver tank.

IMPORTANT

As shown in the figure above, if the compressor is stopped
by the AUTO function, the motorized isolation valve closes.
If a motorized isolation valve is not mounted, back pres­sure rises in the after cooler, check valve, etc., when the
compressor stops running. These conditions promote
drainage, and are contributing factors to rusting inside the
after cooler and early rusting of the check valve, etc.

CAUTION

Do not install a check valve between the DSP
and the air receiver tank. Otherwise, the DSP
may hunt, that is, load and unload very fre­quently ; the capacity control system may not
work normally.

40

5. INSTALLING AND PIPING THE DSP [Piping the DSP Air Compressor]

5.4.5 Air Receiver Tank

Stop Valve

Discharge

Air

Air Receiver Tank

CAUTION

If you fail to install an air receiver tank, the
DSP may load and unload frequently; its
mechanical service life may be shortened.

① As the DSP employs a 0%- or 100%-capacity, 2-step

capacity control system, install an air receiver tank on
the plan airline pipe. Its capacity is as indicated in the
following table.

Model

DSP-132WN

DSP-145WN

DSP-160WN

DSP-200WN

DSP-240WN

DSP-160VWN

DSP-240VWN

Dis.Pressure (MPa)

[psi]

0.75/0.86/1.0

[110/125/145]

0.75/0.86/1.0

[110/125/145]

0.75/0.86/1.0

[110/125/145]

0.75

[110]

0.86/1.0

[125/145]

0.75

[110]

0.86/1.0

[125/145]

0.75/0.86/1.0

[110/125/145]

0.75/0.86/1.0

[110/125/145]

Minimum Capacity of Air

Receiver Tank (m

3

) [US gallon]

4.0 [1057]

4.0 [1057]

4.0 [1057]

4.5 [1190]

4.0 [1057]

5.0 [1320]

4.5 [1190]

4.5 [1190]

5.0 [1320]

5.4.6 Condensate Drain Piping

Drain Pit

Drain Pipe

① Leave open the end of any condensate drain pipe.

② Do not merge the DSP’s condensate drain lines (for

the aftercooler, for intercooler, for the control line fil­ter) into one. Also, do not merge any condensate drain
pipe into an external condensate drain pipe (for exam­ple, one for other DSPs or one for an air receiver
tank). Otherwise, a pressure difference may be gener­ated; as a result, the DSP cannot drain the condensate
or can drain it only abnormally or you cannot visually
check whether the condensate is regularly drained.

CAUTION

Un-drained condensate can backflow to the
DSP air compressor and cause it to fail.

② Do not install a check valve between the DSP and the

air receiver tank. Otherwise, the DSP may hunt, that
is, load and unload very frequently; the capacity con­trol system may not work normally.

③However, in case of AUTO operation specification,

quantity control specification and alternate operation
specification, install air chambers of 4.5 m
gallon) or more for 132kW to 160kW and 5.0 m

3

(1190 US

3

(1320
US gallon) or more for 200kW to 240kW so as to max­imize the energy saving effect.

④When selecting energy saving operation, install air

chambers of 4.5 m
132kW to 160kW and 5.0 m

3

(1190 US gallon) or more for

3

(1320 US gallon) or more
for 200kW to 240kW so as to maximize the energy
saving effect in all the areas of load factors .

41

5. INSTALLING AND PIPING THE DSP [Piping the DSP Air Compressor]

5.4.7 Cooling water piping

Cooling
Water

Cooling

Water Drain Valve

Water
Inlet

① Piping for supplying water to and draining water from

the cooler is required.

② Mount the water drain valves of the cooling water

outlet and inlet downward facing downward as shown
in the figure. The water drain valves may also be
mounted facing sideways.

Outlet

5.4.8 Connecting with the Control Air
Pipe

Pressure
Gauge

A

Filter
Regulator

Oil Mist Remover needs the compressed air control air
of 0.10 to 0.39 MPa (15 to 56 psi) as a control air. Prepare
the air compressor, and connect the control air pipe to
the “A” part of the Oil Mist Remover.

③ Use the union joints that enable you to disconnect and

reconnect the cooling water pipes easily.

IMPORTANT

The control air must be as dry as possible. Connect the
control air pipe, therefore, to the downstream of the air
dryer or, if the air dryer is not used, to the upper section of
the air receiver. This allows you to less frequently drain the
condensate from the filter bowl.

42

5. INSTALLING AND PIPING THE DSP [Ventilation of Air Compressor Room]

A

5.5 Ventilation of Air Compressor Room

CAUTION

Provide a ventilating system to the air com­pressor room in the event of a room tempera­ture exceeding the allowable ambient operat­ing temperature of 40°C (104℉). Operating the
DSP under the ambient operating temperature
above 40°C (104℉) may cause a serious prob­lem to the air end.

① Ventilation with Ventilating Fan (Figure A)

For a small air compressor room, install a ventilating

fan with a capacity as specified by the Technical Data
for Room Ventilation. Position the ventilating fan as
high as possible on the wall and provide the air
compressor room with an air intake opening on the
bottom of the wall.

Install the DSP to direct its air exhaust louver to the

ventilating fan and its air intake louver to the air
intake opening.

Technical Data for Room Ventilation

DSP-

Model

Discharge
Pressure

Heat
Generation

Recommended
Ventilating Fan

The capacity is based on the allowable room temperature rise
of 5℃ (41℉) and the static pressure of 0 Pa (0 psi).

m

①

132WN

MPa

(psi)

MJ/h 57 60 67 90 98

(54,036) (56,880) (63,516) (85,320) (92,904)

(BTU)

3

/min

(5,300)

(cmf)

DSP-

145WN

0.75/0.86/1.0 (110/125/145)

150

160

(5,650)

DSP-

160(V)WN

180

(6,360)

200WN

(8,480)

DSP-

240

DSP-

240(V)WN

260

(9,180)

IMPORTANT

1. Stop the ventilating fan when the DSP has stopped.

2. Keep the ventilating fan operating while the DSP is
operating. Resistance of the un-operated ventilating fan
may reduce the performance of the DSP cooler.

3. Duct is to be detachable so that you can service the
DSP easily.

Air Intake
Opening

Ventilating
Fan

air exhaust
(air compressor)

air
intake

air exhaust

Figure A

ir Intake

Opening

air exhaust
(air compressor)

air exhaust

air
intake

② Ventilation without Ventilating Fan (Figure B)

For a large air compressor room, install the DSP in

the airy area.

Figure B

43

6. STARTUP OPERATION

Follow the instructions in this chapter, also when you restart the DSP after a long-term suspension.

6.1 Air Compressor

CAUTION

● Before you connect the power, verify that the DSP is correctly installed, piped, and wired.

● Check the power supply, and verify that it is firmly grounded and that the voltage is within an allow-

able range (–5% to +10%).

6.1.1 Preparing the Air Compressor

②

③

運転管理

ＲＵＮＮＩＮＧ ＣＯＮＴＲＯＬ

警 報

ＡＬＡＲＭ

機 能

リセット

ＲＥＳＥＴ

ＦＵＮＣ

遠 方

ＲＥＭＯＴＥ

記 憶

ＳＴＲ

表示切替／

ワイドモード
ＳＥＬＥＣＴ／ＷＩＤＥ

１

運転状況

ＲＵＮＮＩＮＧ ＭＯＤＥ

遠 方

ＲＥＭＯＴＥ

負 荷

ＬＯＡＤ

故 障

ＳＨＵＴＤＯＷＮ

運 転

ＳＴＡＲＴ

２

電 源

ＰＯＷＥＲ

起動待ち

ＡＵＴＯ ＳＴＡＲＴ

停 止

ＳＴＯＰ

UNLOAD STOP

6.1.2 Starting the DSP Air Compressor

① Fill the oil through the oil filling port until the oil

reaches the upper red line of the oil level gauge. Use
the Hitachi recommended oils (

p. 7).

② Fully close the water drain valve and start to flow the

cooling water.

③ Make sure that the cooling water flow rate is normal.
④ Connect the power, and verify that the POWER light

is ON.

– STOP lamp on the add-on reactor starter panel glows for

reactor starting madel.

⑤ Change 2 of 3 wires of the power cord if the display

shows CABLE CONNECTED: REV ersal PHASE.

WARNING

Hitachi has NOT filled the oil into the DSP.
Before a startup operation fill any Hitachi
recommended oils (

p.7).
If you operate the DSP without filling the oil, the
air end may be failed or burnt.

②

①

DIS.PRESS：１１０ｐｓｉ

INTSTG.P：２２ｐｓｉ
OILPRESS：２２ｐｓｉ
CLTPRESS：＊＊＊ｐｓｉ

運転管理

ＲＵＮＮＩＮＧ ＣＯＮＴＲＯＬ

警 報

ＡＬＡＲＭ

機 能

リセット

ＲＥＳＥＴ

ＦＵＮＣ

遠 方

ＲＥＭＯＴＥ

記 憶

ＳＴＲ

表示切替／

ワイドモード
ＳＥＬＥＣＴ／ＷＩＤＥ

１

運転状況

ＲＵＮＮＩＮＧ ＭＯＤＥ

遠 方

ＲＥＭＯＴＥ

負 荷

ＬＯＡＤ

故 障

ＳＨＵＴＤＯＷＮ

運 転

ＳＴＡＲＴ

２

電 源

ＰＯＷＥＲ

起動待ち

ＡＵＴＯ ＳＴＡＲＴ

停 止

ＳＴＯＰ

UNLOAD STOP

③④

CAUTION

Raise the pressure as illustrated in the
Pressure Raising Pattern (see illustration to
the right). If this pattern is not followed, the
airendmay seize.

① Fully open the discharge stop valve, and press the

START button.

② Verify that the DSP rotates in a proper direction.

Change 2 of 3 wires of the power cord if the DSP
rotates improperly (or is in a reversal phase connec­tion).

Oil pressure rises to 0.12 MPa (7 psi) or more approx. 10

③

seconds after starting operation. If it has failed to rise,
press the STOP button, and clean the oil strainer.

The compressor switches to full load operation within

④

15 seconds for the

−△ starting model and within

10 seconds for the reactor starting model.

⑤ Raise the pressure step by step as illustrated below.

105

Pressure Raising Pattern

for the specified discharge

90

pressure 110 psi

75

60

65

30

15

Discharge Pressure psi

0

0.5 1.0 1.5 2.0

Operationg Hours

Method of Raising the Pressure

During a startup operation, raise the discharge
pressure step by step. For 30 minutes after
starting, operate the DSP at 15 psi with the
discharge stop valve fully opened. Then raise
the pressure (close the discharge stop valve)
by 100 psi every 15 minutes until the pressure
reaches the specified 110 psi.
For the DSP startup operation, observe the
method without fail.

44

6. STARTUP OPERATION [Air Compressor]

6.1.3 During Operating the DSP Air Compressor

① Check the LCD for operating pressures and tempera-

tures, and verify that:

  – Discharge air pressure, interstage air pressure, oil

pressure, discharge air temperature, 2nd-stage suc­tion air temperature, oil temperature stay within a

MONITOR

自動

AUTO

モニタ

MONITOR

メニュー

MENU

＋／−

UP/ 
DOWN

設定

SET

RUNNINGCONTROL

警報

ALARM

機能

FUNC

運転管理

リセット

RESET

遠方

記憶

STR

［×10h］

表示切替/

ワイド モード
SELECT/WIDE

1

運転状況

RUNNINGMODE

遠方

REMOTE

負荷

LOAD

故障

SHUTDOWN

2

電源

POWER

起動待ち

AUTOSTART

運転 停止

STARTREMOTE

STOP

normal range; see the table below

UNLOAD STOP

㻞㻜㻜㻥䠋㻜㻠䠋㻝㻟 㻝㻥䠖㻜㻞

㻼㻾㻱㻿㻿㼁㻾㻱

㻵 㻺 㼀㻿 㼀 㻳䠊㻼 䠖 㻜䠊 㻞 㻜 㼜 㼟 㼕
㻻 㻵 㻸 㻌 㻼㻾㻱㻿 䠖 㻜䠊㻝 㻜 㼜 㼟 㼕
㻯㻸 㼀䠊㻼㻾㻱 㻿䠖 㻖䠊 㻖 㻖 㼜 㼟 㼕
㼀㻱㻹㻼㻱㻾㻭㼀㼁㻾㻱
㻰㻵 㻿䠊㼀㻱㻹㻼㻝䠖 㻝㻢㻜䉣
㻰㻵 㻿䠊㼀㻱㻹㻼㻞䠖 㻝㻣㻜䉣
㻻 㻵 㻸 㻌 㼀 㻱㻹㻼 䠖 㻡 㻤 䉣
㻯㻸㼀䠊㼀㻱㻹㻼䠖 㻖㻖㻖䉣
㻞㻺㻰 㻌 㻿㼁㻯 㼀䠊㼀䠊 䠖 㻠 㻞 䉣

㻹㻭 㻵 㻺㼀 㻱㻺 㻭㻺㻯 㻱

㻴㻾䠊㼀㻻㻌㻹㻭㻵 㻺㼀䠖 㻜㻜㻜㻜䡄

㻺㻱㼄㼀㻌 㻹㻭 㻵㻺㼀䠖 㻖㻖㻖㻖

② Make sure air containing drain from the inter cooler

drain discharge port and after cooler drain discharge
port is intermittently discharged.

During inspection of the operation of the safety
relief valve, use the appropriate facial protec­tion. High pressure air containing dust particles
can cause severe injury.

Proper Pressure/Temperature Indications on LCD

LCD Indication

0.75 (110) or less

MPa

Discharge Air Pressure (DIS. PRESS)

Interstage Air Pressure (INTSTG. P)

Oil Pressure (OIL PRESS)

1st-Stage Discharge Air Temperature (DIS. TEMP1)
2nd-Stage Discharge Air Temperature

(DIS. TEMP2)
Oil Temperature (OIL TEMP)
2nd-Stage Suction Air Temperature (2ND SUCT. TEMP)

℃ (°F)

℃ (°F)

℃ (°F)
℃ (°F)

0.93 (125) or less

(psi)

1.0 (145) or less

MPa

0.17 (24) to 0.27 (39)

(psi)
MPa

(psi)

0.12 to 0.18 (17 to 26) NOTE 1

NOTES: 1. The oil pressure may exceed 0.18 MPa temporarily when starting the DSP. this is normal.

2. The discharge temperature varies from model to model. Refer the caution decal on the front panel of the unit for details.

Fixed Speed Variable Speed Drive Control

Loading Unloading Loading Purging

0.65 (94) to 0.75 (110)

0.76 (111) to 0.86 (125)

0.9 (130) to 1.0 (145)

-0.08 (-12) to 0 (0)

0.17 to 0.30 (24 to 43)

*0.08 to 0.18 (12 to 26) (Freg. 45Hz or higher)

0.04 to 0.16 (6 to 23) (Freg. less than 45Hz)
185 (365) or less
225 (437) or less

240 (464) or less 145

63 (145) or less
63 (145) or less

WARNING

0.77 (112) or less 110

0.88 (128) or less 125

1.02 (148) or less 145

0.02 to 0.10 (3 to 15)

NOTE 2

NOTE 2

Rated

Pressure

110/125/145

110/125/145

110/125/145

110/125

110/125/145
110/125/145

6.1.4 Stopping the DSP Air Compressor

④

③

ＲＵＮＮＩＮＧ ＣＯＮＴＲＯＬ

警 報

ＡＬＡＲＭ

機 能

ＦＵＮＣ

DIS.PRESS：０００ｐｓｉ

NTSTG.P：０００ｐｓｉ
OILPRESS：０００ｐｓｉ
CLTPRESS：＊＊＊ｐｓｉ

②

運転管理

リセット

ＲＥＳＥＴ

遠 方

ＲＥＭＯＴＥ

記 憶

ＳＴＲ

①

表示切替／

ワイドモード
ＳＥＬＥＣＴ／ＷＩＤＥ

１

運転状況

ＲＵＮＮＩＮＧ ＭＯＤＥ

遠 方

ＲＥＭＯＴＥ

負 荷

ＬＯＡＤ

故 障

ＳＨＵＴＤＯＷＮ

運 転

ＳＴＡＲＴ

２

電 源

ＰＯＷＥＲ

起動待ち

ＡＵＴＯ ＳＴＡＲＴ

停 止

ＳＴＯＰ

UNLOAD STOP

①Press the UNLOAD STOP button. The compressor

then unloads for 5 minutes and then stops running.

(In the case of an emergency, press the STOP button.)


  – STOP lamp on the add-on reactor starter panel glows for

reactor model.

② Check the LCD for pressures, and verify that:

– Oil pressure, interstage air pressure, 0 MPa (0 psi) (or 0.01

MPa (1 psi) depending on your operating conditions)

.

③ Check the condensate drain discharge from the con-

trol line filter by checking the sight glass on the con­trol line filter.

④ Close the discharge stop valve.

⑤ Drain the cooling water.

Open the valve for draining water in the cooling water

piping and drain the cooling water.

To avoid damaging the casing and cooler, be careful

not to allow freezing during the winter.

45

6. STARTUP OPERATION [Oil Mist Remover]

6.2 Oil Mist Remover

■ Initial Setting of Regulator

① Set a control air pressure to a maximum level.

Example: If a control air pressure varies between

0.54 MPa (78 psi) and 0.64 MPa (73 psi),
maintain it at its maximum 0.65 MPa (74
psi).

② Pull up the regulator knob, and then the regulator is

unlocked or settable.

③ Turn the regulator knob so that the pressure gauge

reads as follows:

Standard Setting of Regulator

MPa (psi)

Air Flow Rate

liter/min (cmf)

0.35 (51) about 100 (35)

NOTE:

The pressure gauge readings may increase/decrease by

0.03 MPa (4 psi) as the control air pressure decreases/
increases respectively by 0.10 MPa (15 psi). Remember that,
due to the regulator’s characteristics, the former rather rises
if the latter drops.

④ Make sure that the vacuum indicator does not show a

red mark.

⑤ Make sure that there is no leak of the control air pipe

joints.

⑥ Press down the regulator knob to lock.

⑦ The oil mist remover makes the gear case internal

pressure negative during operation reducing the oil
pressure by 0.005 to 0.01 MPa (0.7 to 2 psi). This is
not abnormal.

Reset the oil pressure on the relief valve.

⑧ Stop the DSP. Make sure that the solenoid valve is de-

energized to close, the pressure gauge reads 0 (zero),
and accordingly the vacuum indicator shows a red
mark.

CAUTION

1. The oil mist remover can operate when the control air pressure is to 0.39 MPa (57 psi) or more. If the
control air of this pressure is not available (that is, when the DSP is just started or is unloading with
opening the blowoff valve), the ejector can not operate and, as a result, the gear case internal pres­sure rises. When the gear case internal pressure reaches about 20mmH
relieve it to the atmosphere for preventing its abnormal rise, and thereby oil mists are inevitably
vented. Avoid, therefore, a long time unloading operation as possible as you can; and, if it is
unavoidable, take a precaution so that the DSP dos not suck the oil mists.

2. If you use two or more DSPs in parallel, the system forces a specific unit to unload for a long time. Its
oil mist remover ejector seldom operates and thereby its relief valve opens frequently with much oil
mists vented. To solve the problem, connect its control air pipe to where is always pressurized there­by minimizing the period to open the relief valve.

3. The relief valve shortly opens when you start/stop the DSP even if the control air pressure is high.
After the repeated starting/stopping, the relief valve may be slightly oozed with oil. This is not abnor­mal.

4. The oil mist remover consumes the compressed air of 100 liters per minute or lower or higher.

Exact air consumption depends on the setting of the regulator.

5. Take a precaution if you use the DSP in an AUTO operation mode with the oil mist remover, because
the DSP may not stop automatically due to an uninterrupted consumption of the compressed air by
the oil mist remover.

O, the relief valve opens to

2

46

7. WIRING

WARNING

1.

Always use a licensed electrician. Do not allow an unlicensed person to wire the air compressor. An
unlicensed person may wire the air compressor wrongly, and a wrong wiring may cause an electric shock.

2. Do not remove any protective relays on the air compressor. Also, do not make a modification of the
control circuit that may result in impairing the protective relay's function. Remember that the loss of the
protective relay's function may cause serious damage to the air compressor such as a burning of the air
end. In the event that you need to modify the control circuit, consult your distributor.
Before opening the starter/control box cover to service or wire the air compressor, disconnect the power;

3.
otherwise you may receivean electric shock. In addition, attach a notice on the power supply stating “Under
the maintenance work. Keep the switch off.” to prevent someone from carelessly turning the switch on.

7.1 Power Source Transformer and Power Cable

Prepare a power supply transformer with adequate
capacity. Also, use a power cable with adequate thickness
and length. Otherwise, an excessive voltage drop may
occur when you have pressed the START button; accord­ingly the DSP motor may fail to fully accelerate.
Also a control circuit may occur be energized insuffi­ciently ; accordingly the DSP may be shut down.

Always control the maximum drop of starting voltage
within 5% of the rated voltage. To do so, use the power
supply transformer and power cable as listed in the table
below.
The maximum voltage imbalance between the press shall
be within 1%.

Model DSP-132W6N DSP-145W6N DSP-160(V)W6N DSP-200W6N DSP-240(V)W6N

Power Supply Voltage 400V Class

Power Transformer
Capacity (1) (KVA)

Power Cable Thickness

mm2 (AVG)

NOTES:
(1) Capacity values are reference data; some power supplies may require a larger-capacity transformer.
(2) Lower thickness values are based on the power cable length of less than 20 m. In the event that the power cable is longer than 20m,

employ a thicker one. Provide intermediate terminals to keep the thickness lower than the maximum values at the air compressor terminal
block.

150(2) to 250

(250 to 350)

7.2 MIV and WIVM wiring

① Electrical wiring of Motorized Isolation Valve (MIV),

which is attached at left side panel, and Motarized
Water Isolation Valve (WIVM) shall be done on side.
Refer to below drawing.

350 or more 500 or more

200(2) to 250

(300 to 350)

250(2) or more

(4/0×2 or more)

325(2) or more

(250×2 or more)

7.3 Connecting a Power Cable

① Wiring inside the DSP is completed prioer to ship-

ment by Hitachi.
Refer to “Wiring Connection Diagram” (

② Ground resistance requirements are required when

connected the power cable and grounding cable. The
ground resistance requirements are shown in the

WIRING FOR MIV

1

2

3

4

5

WIRING No. 'DA'

WIRING No. '44'

WIRING No. '43'

CABLE FROM TB3 IN THE CONTROL PANEL

TERMINAL BOX OF MIV

WIRING FOR WMIV

table below:

Power Supply Voltage

460V Type C 10Ωor less

Ground Resistance Type

Ground Resistance Value

③ Connect the power cable so that ease of disassem-

bling and reassembling the enclosure panels is taken
into consideration.

④ The compressor requires its own branch circuit pro-

tection adjacent to the compressor.

The type (Fuse disconnect, Circuit breaker, or Earth

leakage (ground) circuit breaker) and its sizing must

BLACK

WHITE

RED

GREEN

YELLOW

WIRING No. 'DA'

WIRING No. '46'

WIRING No. '45'

CABLE FROM TB3 IN THE CONTROL PANEL

TERMINAL BOX OF WIVM

be selected in accordance with national or local elec­tric code requirements . (Recommendation type:

4. Wiring Connection Diagram) Do not use simple
disconnect such as a knife switch in wiring.

The type and sizing not supplied by Hitachi is the

responsibility of the customer.

NOTE: If the earth leakage circuit breaker is used, the sen-

sitivity-current is set to 200 mA.

47-48).

47

7. WIRING [Connecting a Power Cable]

⑤ Disconnect the power and verify that it is safe before

1.) Overhauling the DSP, 2.) Filling oil the DSP and/or

3.) Servicing the starter/control box.

⑥ Field wiring connections must be made by UL and

CSA certificated ring lug terminal connectors sized
for the wire gauge being used. The connector must
be fixed using the crimping tool specified by the con­nector manufacturer.

⑦ Use the attached rubber bushes (on the power cable

holes) and the protective tube to protect the power
cable (see illustration below).

If the customer utilize bushings by their own, follow

UL requirements. Type 1 device is the minimum level
of replacement for the provided rubber bushings.

⑧ Customer should follow UL requirement; See refer-

ences below:

a) The branch circuit protection shall be

460V500A (132kW model), 460V500A (145kW model)
460V600A (160kW model), 460V800A (200kW model)
460V800A (240kW model)

maximum UL listed dual element time delay branch

circuit type fuses.

b) Rubber bushings can only be replaced with a mini-

mum of type 1 device.

Remove the starter/control box covers and connect a
power cable as illustrated below.

Starter /
Control Box

Power Supply
Wiring

CAUTION

An unprotected power cable can cause direct
contact with the steel plates e. g. the power
cable holes is resonated with a slight vibra­tion, it could damage the cover over time and
result in a short circuit accident.

CAUTION

● Install an earth leakage circuit breaker between the air compressor and the power supply. Do not use

a mere disconnector such as a knife switch in wiring because it cannot protect the air compressor
and may result in a burning of the air end if a ground fault has occurred.

● Ground the air compressor; otherwise you may receive an electric shock, or the air compressor may

fail. As a ground, do not use a steel skeleton of the building because it may cause an operational fail­ure. Ground independently and directly into the earth.

48

■ Other Operating Precautions

7. WIRING [Connecting a Power Cable]

(1) A thermal relay is not provided on the main circuit of

the inverter-controlled DSP. Instead, the electron­ics-type thermal relay is built into the inverter for
protecting the main circuit.

(2) Phase failure is only enabled immediately after con-

necting the power. If a phase failure occurs during
operation, it is not detected and eventually causes the
inverter to overheat. Tightly fasten, therefore, the
cables/wires.

(3) Do not install a power-factor enhancing capacitor on

the motor side. Failure to observe this may cause the
inverter’s capacitors to receive the larger charging
current, resulting in a failure of the inverter.

(4) If radios, TV sets, or any other electronics devices

are located around the DSP, install the HITACHI
noise filters (as specified below) on the power cable.

(5) The inverter in the starter is attached with a digital

operator for setting and operating the inverter.
Hitachi has finished adjusting the digital operator to
the appropriate settings, before shipping the DSP
from the factory. Do not operate the attached
digital operator; otherwise the inverter may mal­function and cause a problem.

Description

Zero phase
reactor

Radio noise
filter for input

Noise filter
for inverter

160VWN 240VWN

400V
class

400V
class

400V

NF-H400 NF-H700

class

ZCL-B95

CFI-H

Reduction of noise to
radio etc.

Reduction of radiation noise
from the power cable

Reduction of normal noise and
common noise from the power cable

CAUTION

Functions

Immediately after disconnecting the power, the
inverter is still live. Before servicing the start­er/control box, therefore, make sure that the
inverter’s charge indicator is off or wait for 10
minutes after disconnecting the power.

(6) In the cases below ①②, a surge voltage may be gen-

erated in the inverter input side, which may cause a
inverter failure. In such cases, install an AC reactor
shown in the following table between power and the
air compressor. ① An phase advance capacitor
installed between power and the air compressor
opens and closes. ② The maximum voltage imbal­ance between the phases shall be over 1%.

Recommended AC reactor

Model AC reactor

160VWN ALI-300H2

240VWN ALI-420H2

49

7. WIRING [Wiring Connection Diagram, Control Panel /LCD monitor Specifications]

7.4 Wiring Connection Diagram

1．Wiring Connection Diagram 1 (132WN,145WN,160WN,460V Class)…………… Page 51
2．Wiring Connection Diagram 2 (200WN,240WN,460V Class)……………………… Page 53
3．Wiring Connection Diagram 3 (400V Class, Inverter Staring) ……………………… Page 55

7.5 Control Panel /LCD monitor Specifications

Operating
Source Voltage

Starting Method

Operating
Functions

Display
Functions
(Light)

Setting function
Display function
(4 digit digital monitor)

Display
Functions
(LCD display)

(1) Unload stop operation (2) IPI restart (optional) (3) Remote operation
(4) Dryer prestart (5) Dual operation (optional) (6) Schedule operation
(7)

(1) POWER light (2) START light (3) SHUTDOWN MODE light
(4) LOAD light (5) REMOTE light (6) AUTO light
(7) AUTO START light

(1) Control setting and function setting

(1) Discharge pressure (2) Running hours (3) Discharge temperature
(4) Load ratio (5) Warning/Shutdown Code (6) Warning/Shutdown History
(7) Pressure setting

(1) Monitor Display

‒Clock ‒Control Setting ‒ Discharge pressure
‒ Interstage Pressure ‒Oil pressure ‒ Operating hours
‒Loading hours ‒ Number of load/unload ‒ Dis. Temp. 1
‒Dis. Temp. 2 ‒ Oil Temp. ‒Current
‒

2nd stage Air End Suction temp.

‒ Load ratio ‒ ON time ‒OFF time

(2) Message Display

‒ Inspection ‒ Auto Stop ‒ Restart
‒ Message ‒ IPI/retry ‒ Unload stop running

460V (60Hz)

Fixed Speed … - △ (3 contactors) VSD …Variable Frequency Drive

ECOMODE [Energy save operation]

‒ Hours before next maintenance ‒Next maintenance

(3) Alarm/Shutdown Display

‒ Alarm ‒ Setting/Connection Error ‒ Reconnect Power
‒ Shutdown ‒ Malfunction

(4) Function Setting Display

‒ Model setting ‒ Warning history ‒ Scheduled operation
‒ Shutdown history ‒ Operating mode ‒ Detailes of shutdown history
‒ Operation data ‒ Capacity control

No Voltage
Terminal

IPI Auto Restart Circuit

(Note) Setting (1) : Selected on the instrument panel (from 1 to 5 seconds)
Setting (2) : 15 to 60 seconds
Unload Stop : Operated by unload stop key pad located lower on operation print board.

(1) Operation output
(2) Alarm output
(3) Shutdown output

20ms or less
20ms to Setting (1)
Setting (1) or more

… make contact×1
… make contact×1
… make contact×1

Continues operation.
Shutdown compressor (dis. air), restart automatically after Setting (2).
Shutdown compressor.

50

7. WIRING [Wiring Connection Diagram]

7.4.1 Wiring Connection Diagram 1 (132WN, 145WN, 160WN, 460V Class (1/2))

SHALL BE SHIELD CABLE.
WIRING BETWEEN EACH UNIT

C

500ms OR MORE

ONE-SHOT INPUT

REMOTE UNLOAD STOP

C

DA

DA1

TB2

DA1

C

R2

R4

D1D2D3D4D5

DA

TB3

(SLAVE)

C

D1D2D3D4D5

DA

TB3

ES

DURING LEAD-LAG OPERATION,

S2

※SHORT CIRCUIT

DC GND(DA)

(MASTER)

REMOVE TWO SHORT CIRCUIT WIRES

FROM EITHER OF THE TWO UNITS.

DC24V(C)

D6

D6

RS+

RS485(+)

RS485(−)

RS−

CLASS 1 CONTROL CIRCUIT

D1 D2 D3 D4 D5 D6

CN21

DUAL

USP

4321

32

33

DA

LED

USP

C

CN

DA1

CLASS 1 CONTROL CIRCUIT

TH5

TH4

PS4

(R) (W) (B)

1234 1234 12 12

AUTO

START

POWER

RUNNING MODE

RUNNING CONTROL

REMOTE

ALARM

AUTO

LOAD

[×10h]

MONITOR

SHUTDOWN

RESET

FUNC

MENU

TH4 CN3PS4 CN2PS3 CN1 TH5 CN4

1

2

TAB2

CN11

TAB1

STOP

STARTREMOTE

SELECT

/WIDE

+/−

UP/

LCD

POWER

CN7

2

1

STR

DOWN

1

2

1 9 1 13

SET

CN1 CN2

PWB2

CN8CN9CN10

321 123 1 5

CN23

CN20

OPERATION INPUT (DC24V)

LOAD/UNLOAD INPUT (DC24V)

OPERATION OUTPUT (TR OUT)

CN19

CN25

485FC

CN17

485EX OPE2 OPE1

PID OUTPUT(0-5V)

LOAD/UNLOAD OUTPUT (TR OUT)

PWB1

CN18

123 123 1234 1 9 1 51 13 12345678

485DP

REFER TO THE INSIDE OF THE AIR

COMPRESSOR, BUT NOT IN THE

CONTROL PANEL

REFER TO THE WIRING DIAGRAM 1

C

REFERENCE:

C

RST

BT

RST

R1 S1 T1

TB0

(G)

(L)

(K)

CT

BATTERY

EMERGENCY STOP

UNLOAD STOP SWITCH

CURRENT TRANSFORMER

BT

CT

ES

USP

(+) 24V

(–) 24E

to

AVR1toAVR2

(+) C

(–) DA

PARTS NAME

LCD MONITOR

DISPLAY PC BOARD

CONTROL PC BOARD

PRESSURE SENSOR (OIL)

PS4

LCD

PWB1

PWB2

SYMBOL

TERMINAL BROCK

TERMINAL BROCK

THERMISTOR (OIL)

THERMISTOR (1ST DIS.)

TB0

TH4

TH5

TB2,3

51

7. WIRING [Wiring Connection Diagram]

7.4.2 Wiring Connection Diagram 1 (132WN, 145WN, 160WN, 460V Class (2/2))

UNLOAD

STOP

C

20UM

ES

20A

20W

D

CLASS 1 CONTROL CIRCUIT

C

4321

CN

USP

to

TB3

SHORT CIRCUIT

DURING REMOTE OPERATION,

REMOVE SHORT CIRCUIT WIRES.

Y52A

D1

AK

33

32

12345

CN12

TR OUT

DC24V(+)

DC24V

REMOTE STOP

123456789

24L

CN21 DUAL

DC24V INPUT

REMOTE SETTING

EXTERNAL LOAD/UNLOAD

CN23

CN21

to

PWB2 CN2

to

PWB2 CN1

CN20

OPE2 OPE1

CN19

SW1SW2

PWB1(HC55)

CN17

CHG

CN18 CN25

123 123 12341 91 131 815

12

to

LCD CN9

CN16

PS2

CN24

1

2

1234123

SUCF

B

A

(R)

(W)

DS1-2

DS1-1

R2S2T2

CE

CE

CE

5A

SP1

RS

115V

460V

BOTH MAIN DISCONNECT MEANS AND BRANCH CIRCUIT

RP

PROTECTION SHALL BE PROVIDED BY THE CUSTOMER.

IN ADDITION,MAIN DISCONNECT MEANS SHALL BE PROVIDED

ON THE LINE SIDE OF THE BRANCH CIRCUIT PROTECTION.

FOR USE ON A SOLIDLY GROUNDED WYE SOURCE ONLY.

RST

3φ

AC460V 60Hz

52

63SV

T2A

46 42

R2

R4

C

R2
R4

LF

S2

(G)

S2

TR

1kVA

SP

46

SP

RP

TB0

RST

C

TB2

500ms OR MORE

ONE-SHOT INPUT

OPERATION DRY "a" CONTACT(0.5A)

REMOTE START

Y1

Y1

STOP

COM2

COM1

START

REMOTE OPERATION

DRYER ANSWER

PS1

CN11

(B)

(B)

(R)

(W)

PS1 PS2

ES

5A

T1A

CB2

T1

(G)

S2

R4

R2

DA

DA1

CAUTION DRY "a" CONTACT(0.5A)

SHUTDOWN DRY "a" CONTACT(0.5A)

EXTERNAL LOAD/UNLOAD : "a" CONTACT(0.5A)

REMOTE SETTING : "a" CONTACT(0.5A)

Y3

Y2

10

Y2

Y3

UNL

REM

TB1

OPERATION ANSWER

OVER LOAD

OVER LOAD

CN10

TH2

TH3

CN13

121

2

4

TH2

TH3

C

AVR2

90W

(G)

AVR1

60W

(G)

(G)

(–)

AVR3

(+)

30W

(G)

CB1

R1

S1

CT

(L)

(K)

Y52A

15A

41

41

TH1

1

R

(–)

(+)

(+) (–)

42S243

42

CE

CE

S2T2R2

135

CN15

Y52C

Y20

Y21

Y42α

Y42

Y6

Y52

CN9

2

DA1

C1

S1A

44DA45

434446

Y52A

CDAC1

X

CE

7

PHASE

DSA

REVERSE

ANS

OVLD

24V1

12345

DA

C

T1A

R1A

42

52

to PWB2 TAB1

to PWB2 TAB2

46

DA

45

Y52A

DA1

Y

(G)

CN3

CN5

C N7

C N4

C N8

531 31 317531 531 531

CN6

CN2

4321 43 21

24V2

CN14

CN1

C

DA

24E

24V

Y

1.1A

49M2

88F

YZX

49M1

132kW 460V/146A

145kW 460V/152A

RY

21X

S

CE

CE

CE

S3

6

RY21X

S3

17

18

S3

10

11

R4

S3

35

8

31

34

52

36

37

88F

39

38

52

to TB3

X

12

to

LCD CN7

C

UVW

IM2

0.4kW

460V/1.0A

6

IM1

V2 W2 U2

W1 V1 U1

C

UVW

160kW 460V/167A

K

K

S

CE

K

S

CE

SK

CE

132kW 460V/240A

145kW 460V/250A

160kW 460V/275A

C

R3D

S2

R3D

S2

R3

S2

R3

6

S2
S3

6

S3

S3
35

35

18

18

S3

S3

TB2

R3V

S2

42

15

6

16

49M1

8A

CE

CE

CE

CN38

CN39

13

2

49M

14

CECE

CECE

21 21

PARTS NAME

RESISTANCE

LIGHTNING ARRESTER

R

DSA

SYMBOL

FAN MOTOR

PARTS NAME

MAIN MOTOR

IM1

RESPONSIBILITY OF THE CUSTOMER.

NOTES:

1. SIZING OF ELECTRICAL COMPONENTS NOT SUPPLIED BY HITACHI IS THE

2. RATED DRY CONTACT IS AC110V 0.5A (MAX)

3. SIGNAL INPUT FOR REMOTE OPERATION IS DC24V

4. BRANCH CIRCUIT PROTECTION SHALL BE 460V/550A (132/145/160kW) MAX.

UL LISTED DUAL ELEMENT TIME DELAY BRANCH CIRCUIT TYPE FUSES.

5. FIELD WIRING CONDUCTOR SHALL BE 3/9OMCM×2.

IM1

SYMBOL

6. USE LISTED PRESSURE TERMINAL CONDUCTORS SUCH AS A RING TYPE.

7. CONNECT MAXIMUM 3 FIELD WIRING CONDUCTOR TO ONE CONDUIT.

CE

CE

CE

CE

S2

CE CECE CECECE

R3V

R3V

S2

CECE

37

CE

CE

37S3 S3

K

S

CE

4252 6

K

S

CE

K

S

88F1

CE

K

S

FM1

FM2

DIP SWITCH

CHARGE LAMP

SURGE ABSORBER

REVERSE PHASE RELAY

46

SK

GHG

SW1,2

Y

△

MAIN ELECTROMAGNETIC CONTACTOR

ELCTROMAGNETIC CONTACTOR FOR FAN

ELCTROMAGNETIC CONTACTOR FOR

ELCTROMAGNETIC CONTACTOR FOR

6

52

42

88F

20D2

20D1

20U1 20U2

REFER TO CONPONENTS THAT ARE

EXTERNAL TO THE AIR COMPRESSOR

PACKAGE

D

20US

20U3 20U4

REFER TO THE INSIDE OF THE AIR

COMPRESSOR, BUT NOT IN THE

CONTROL PANEL

REFER TO THE WIRING DIAGRAM 2

C

REFERENCE:

ACTION

CE

ON AT OPERATION

(LOAD/UNLOAD/AUTO STOP)

ON AT CAUTION

ON AT SHUTDOWN

ON AT MAIN MOTOR RUNNING

DESCRIPTION

OPERATION RELAY

CAUTION OUTPUT

SHUTDOWN OUTPUT

OPERATION RELAY

Y1Y2Y3

SYMBOL

RELAY OUTPUT

FAN

CIRCUIT BREAKER

EMERGENCY STOP

Y52Y6Y42

DIODE

CONNECTOR

CONNECTOR

PLUG IN CONNECTOR

SUPPLEMENTARY PROTECTOR

ES

SP1

CB1,2

CONTROL PC BOARD

THERMAL RELAY FOR FAN MOTOR

THERMAL RELAY FOR MAIN MOTOR

49M1

49M2

PWB1

D1

CE

DS

CN

FM1,2

LCD MONITOR

SOLENOID VALVE

SOLENOID VALVE

SOLENOID VALVE

DISPLAY PC BOARD

LCD

20U1

20U2

20U3

PWB2

)

△

)

Y

)

△

ON AT RUNNING (

(2 SECOND LATER AFTER

ON

AT CONDENSATE DISCHARGE

ON AT LOAD

ON AT RUNNING (

RELAY FOR YRELAY FOR △LOAD/UNLOAD RELAY

TRANSFORMER

AUTOMATIC VOLTAGE REGULATOR

TR

AVR1,2

SOLENOID VALVE

SOLENOID VALVE

20U4

20US

CONDENSATE RELAY

Y20

Y21

RELAY

RELAY

LINE FILTER

SOLENOID VALVE FOR OMR

SOLENOID VALVE FOR CONDENSATE

MOTORIZED ISOLATION VALVE FOR AIR

LF

RY21X

20D1,2

20UM

20A

Y52A

TERMINAL BLOCK

THERMISTOR (2ND DIS.)

PRESSURE SENSOR (1ST DIS.)

THERMISTOR (2ND SUCTION)

PRESSURE SENSOR (2ND DIS.)

PRESSURE DIFFERENTIAL SWITCH

TB0

PS1

PS2

TH2

TH3

63SV

ON AT MAIN MOTOR RUNNING

OFF AT TO SECONDS LATER

AFTER MAIN MOTOR STOP

OPERATION RELAY

Y52A

MOTORIZED ISOLATION VALVE FOR WATER

20W

TERMINAL BLOCK

CURRENT TRANSFORMER

CT

TB1-3

7. WIRING [Wiring Connection Diagram]

7.4.3 Wiring Connection Diagram 2 (200WN, 240WN, 460V Class (1/2))

SHALL BE SHIELD CABLE.
WIRING BETWEEN EACH UNIT

C

500ms OR MORE

REMOTE UNLOAD STOP

C

DA

DA1

TB2

C

DA1

ONE-SHOT INPUT

ES

S2

R4

R2

D1D2D3D4D5

DA

TB3

(SLAVE)

C

D1D2D3D4D5

DA

TB3

(MASTER)

DURING LEAD-LAG OPERATION,

REMOVE TWO SHORT CIRCUIT WIRES

FROM EITHER OF THE TWO UNITS.

※SHORT CIRCUIT

DC GND(DA)

DC24V(C)

D6

D6

RS+

RS485(+)

RS485(−)

RS−

CLASS 1 CONTROL CIRCUIT

D1 D2 D3 D4 D5 D6

CN21

DUAL

USP

4321

32

33

DA

LED

USP

C

CN

DA1

CLASS 1 CONTROL CIRCUIT

TH5

TH4

PS4

(R) (W) (B)

12 3 4 1234 12 1 2

AUTO

POWER

LOAD

REMOTE

[×10h]

ALARM

RUNNING CONTROL RUNNING MODE

AUTO

MONITOR

TH4 CN3PS4 CN2PS3 CN1 TH5 CN4

1

2

CN11

TAB1

STOP

START

START

SHUTDOWN

SELECT

/WIDE

RESET

REMOTE

FUNC

MENU

+/−

LCD

TAB2

2

1

STR

UP/

DOWN

POWER

CN7

15 12345678

CN23

CN1 CN2

1 9 1 13

CN20

OPERATION INPUT (DC24V)

LOAD/UNLOAD INPUT (DC24V)

OPERATION OUTPUT (TR OUT)

CN19

PID OUTPUT(0-5V)

LOAD/UNLOAD OUTPUT (TR OUT)

PWB2

CN25

485FC

SET

CN17

485EX OPE2 OPE1

PWB1

CN8CN9CN10

321 123 1 5

1

2

123 123 1234 1 9 1 13

CN18

485DP

REFER TO THE INSIDE OF THE AIR

COMPRESSOR, BUT NOT IN THE

CONTROL PANEL

REFER TO THE WIRING DIAGRAM 1

C

REFERENCE:

C

RST

BT

RST

R1 S1 T1

TB0

(G)

(L)

(K)

CT

BATTERY

EMERGENCY STOP

UNLOAD STOP SWITCH

CURRENT TRANSFORMER

BT

CT

ES

USP

(+) 24V

(–) 24E

to

AVR1toAVR2

(+) C

(–) DA

PARTS NAME

LCD MONITOR

DISPLAY PC BOARD

CONTROL PC BOARD

PRESSURE SENSOR (OIL)

PS4

LCD

PWB1

PWB2

SYMBOL

TERMINAL BROCK

TERMINAL BROCK

THERMISTOR (OIL)

THERMISTOR (1ST DIS.)

TB0

TH4

TH5

TB2,3

53

7. WIRING [Wiring Connection Diagram]

7.3.4 Wiring Connection Diagram 2 (200WN, 240WN, 460V Class (2/2))

C

4321

CN

USP

to

TB3

DC24V

SHORT CIRCUIT

DURING REMOTE OPERATION,

REMOVE SHORT CIRCUIT WIRES.

Y52A

D1

AK

33

32

12345

CN12

TR OUT

DC24V(+)

REMOTE STOP

123456789

24L

CN21 DUAL

DC24V INPUT

REMOTE SETTING

EXTERNAL LOAD/UNLOAD

to

PWB2 CN2

OPE2 OPE1

CN19 CN20 CN23CN21

to

PWB2 CN1

SW1SW2

PWB1(HC55)

CN17CN18 CN25

CHG

123 123 12341 91 131 81 5

12

to

LCD CN9

CN16

PS2

CN24

1

2

1234123

SUCF

B

A

(B)

(R)

(W)

DS1-2

DS1-1

T2

R2

S2

63SV

T2A

46 42

R2

R4

CE

CE

CE

(G)

SP1 5A

S2

RS

115V

TR

1kVA

460V

SP

BOTH MAIN DISCONNECT MEANS AND BRANCH CIRCUIT

PROTECTION SHALL BE PROVIDED BY THE CUSTOMER.

RP

IN ADDITION,MAIN DISCONNECT MEANS SHALL BE PROVIDED

ON THE LINE SIDE OF THE BRANCH CIRCUIT PROTECTION.

FOR USE ON A SOLIDLY GROUNDED WYE SOURCE ONLY.

RST

3φ

AC460V 60Hz

54

C

R2

R4

LF

S2

46

SP

RP

TB0

RST

C

TB2

500ms OR MORE

ONE-SHOT INPUT

OPERATION DRY "a" CONTACT(0.5A)

REMOTE START

Y1

Y1

STOP

COM2

COM1

START

REMOTE OPERATION

DRYER ANSWER

OPERATION ANSWER

PS1

CN11

4

(B)

(R)

(W)

PS1 PS2

ES

TB2

5A

T1A

CB2

T1

(G)

UNLOAD

STOP

DA

DA1

CAUTION DRY "a" CONTACT(0.5A)

SHUTDOWN DRY "a" CONTACT(0.5A)

Y3

Y2

Y2

Y3

OVER LOAD

TH3

CN13

121

TH3

90W

60W

30W

R1

S1

S2

R4

EXTERNAL LOAD/UNLOAD : "a" CONTACT(0.5A)

REMOTE SETTING : "a" CONTACT(0.5A)

10

UNL

REM

OVER LOAD

TH2

TH2

(G)

AVR3

(G)

CT

(K)

ES

R2

TB1

CN10

2

C

AVR2

(G)

AVR1

(G)

(−)

(+)

CB1

(L)

Y52A

15A

41

41

TH1

(−)

(+)

(+) (−)

1

R

C

CN9

20UM

42S243

42

CE

CE

S2T2R2

135

CN15

Y52C

Y20

Y42α

Y42 Y21

Y6

2

DA1

C1

S1A

44DA45

434446

Y52A

CDAC1

CE

PHASE

REVERSE

Y52

24V1

12345

T1A

R1A

20A

X

7

DSA

ANS

OVLD

C DA

Y

42

52

to PWB2 TAB1

to PWB2 TAB2

20W

46

DA

45

DA1

Y

(G)

CN3

CN5

CN7

CN4

CN8

531 31 317531 531 531

CN6

CN2

4321 43 21

24V2

CN14

CN1

C

DA

24E

24V

1.1A

49M2

88F

YZX

49M1

200kW 460V/213A

D

Y52A

RY

21X

CE

S3

6

RY21X

S3

17

18

S3

10

11

S3

R4

35

8

31

34

52

36

37

88F

39

38

52

to TB3

X

12

to

LCD CN7

C

UVW

IM2

0.4kW

6

IM1

V2 W2 U2

W1 V1 U1

C

UVW

240kW 460V/242A

K

S

CE

K

S

K

S

CE

460V/1.0A

200kW 460V/352A

CLASS 1 CONTROL CIRCUIT

C

R3D

R3

S2

R3

6

S2
S3

6

S3

CE

CE

SK

CE

S3

35

35

18

18

S3

S3

TB2

42

6

16

1

49M

8A

CE

CN38

CE

240kW 460V/399A

RESPONSIBILITY OF THE CUSTOMER.

NOTES:

1. SIZING OF ELECTRICAL COMPONENTS NOT SUPPLIED BY HITACHI IS THE

2. RATED DRY CONTACT IS AC110V 0.5A (MAX)

3. SIGNAL INPUT FOR REMOTE OPERATION IS DC24V

12

CN39

12

CE

4. BRANCH CIRCUIT PROTECTION SHALL BE 460V/700A(200/240kW) MAX.

UL LISTED DUAL ELEMENT TIME DELAY BRANCH CIRCUIT TYPE FUSES.

5. FIELD WIRING CONDUCTOR SHALL BE 300MCM×2.

6. USE LISTED PRESSURE TERMINAL CONDUCTORS SUCH AS A RING TYPE.

7. CONNECT MAXIMUM 3 FIELD WIRING CONDUCTOR TO ONE CONDUIT.

CE

20D2

R3D

S2

CE

CE

20D1

CE

R3V

S2

CE CECE CECECE

R3V

S2

R3V

20US 20U1 20U2

S2

CECE

37

CE

CE

37S3 S3

20U3 20U4

6

K

S

CE

S2

15

42

K

S

CE

K

S

13

52

2

49M

88F1

14

CE

CE

K

S

CECE

FM1

CECE

FM2

DIP SWITCH

RESISTANCE

PARTS NAME

CHARGE LAMP

SURGE ABSORBER

LIGHTNING ARRESTER

DSA

SYMBOL

PARTS NAME

MAIN MOTOR

IM1

SYMBOL

R

SK

GHG

SW1,2

Y

△

FAN MOTOR

MAIN ELECTROMAGNETIC CONTACTOR

ELCTROMAGNETIC CONTACTOR FOR

ELCTROMAGNETIC CONTACTOR FOR

6

52

42

IM1

REVERSE PHASE RELAY

46

ELCTROMAGNETIC CONTACTOR FOR FAN

THERMAL RELAY FOR MAIN MOTOR

88F

49M1

REFERENCE:

ACTION

ON AT OPERATION

DESCRIPTION

OPERATION RELAY

Y1Y2Y3

SYMBOL

RELAY OUTPUT

FAN

CIRCUIT BREAKER

EMERGENCY STOP

SUPPLEMENTARY PROTECTOR

ES

SP1

CB1,2

FM1,2

LCD MONITOR

DISPLAY PC BOARD

CONTROL PC BOARD

THERMAL RELAY FOR FAN MOTOR

LCD

49M2

PWB1

PWB2

REFER TO CONPONENTS THAT ARE

EXTERNAL TO THE AIR COMPRESSOR

PACKAGE

REFER TO THE INSIDE OF THE AIR

COMPRESSOR, BUT NOT IN THE

CONTROL PANEL

REFER TO THE WIRING DIAGRAM 2

CD

)

△

)

Y

)

△

(LOAD/UNLOAD/AUTO STOP)

ON AT CAUTION

ON AT SHUTDOWN

ON AT MAIN MOTOR RUNNING

ON AT RUNNING (

(2 SECOND LATER AFTER

ON

AT CONDENSATE DISCHARGE

ON AT MAIN MOTOR RUNNING

OFF AT TO SECONDS LATER

ON AT RUNNING (

ON AT LOAD

CAUTION OUTPUT

SHUTDOWN OUTPUT

OPERATION RELAY

RELAY FOR YRELAY FOR △LOAD/UNLOAD RELAY

Y52Y6Y42

RELAY

DIODE

CONNECTOR

CONNECTOR

TRANSFORMER

Y20

RELAY

AFTER MAIN MOTOR STOP

CONDENSATE RELAY

OPERATION RELAY

Y21

Y52A

LINE FILTER

PLUG IN CONNECTOR

SOLENOID VALVE FOR OMR

SOLENOID VALVE FOR CONDENSATE

DS

CN

SOLENOID VALVE

SOLENOID VALVE

20U1

20U2

AUTOMATIC VOLTAGE REGULATOR

TR

D1

CE

Y52A

AVR1,2

SOLENOID VALVE

SOLENOID VALVE

SOLENOID VALVE

PRESSURE SENSOR (1ST DIS.)

PRESSURE DIFFERENTIAL SWITCH

PS1

20U3

20U4

63SV

20US

MOTORIZED ISOLATION VALVE FOR AIR

MOTORIZED ISOLATION VALVE FOR WATER

LF

20A

20W

20UM

RY21X

20D1,2

TERMINAL BLOCK

TERMINAL BLOCK

THERMISTOR (2ND DIS.)

CURRENT TRANSFORMER

THERMISTOR (2ND SUCTION)

PRESSURE SENSOR (2ND DIS.)

CT

TB0

PS2

TH2

TH3

TB1-3

7. WIRING [Wiring Connection Diagram]

7.4.5 Wiring Connection Diagram 2 (400V Class, Inverter Staring (1/2))

SHALL BE SHIELD CABLE.
WIRING BETWEEN EACH UNIT

C

500ms OR MORE

REMOTE UNLOAD STOP

C

DA

DA1

TB2

C

DA1

ONE-SHOT INPUT

ES

S2

R4

R2

D1D2D3D4D5

DA

TB3

(SLAVE)

C

D1D2D3D4D5

DA

TB3

(MASTER)

DURING LEAD-LAG OPERATION,

REMOVE TWO SHORT CIRCUIT WIRES

FROM EITHER OF THE TWO UNITS.

※SHORT CIRCUIT

DC GND(DA)

DC24V(C)

D6

D6

RS+

RS485(+)

RS485(−)

RS−

CLASS 1 CONTROL CIRCUIT

D1 D2 D3 D4 D5 D6

CN21

DUAL

USP

4321

32

33

DA

LED

USP

C

CN

DA1

CLASS 1 CONTROL CIRCUIT

TH5

TH4

PS4

(R) (W) (B)

12 3 4 1234 12 1 2

AUTO

POWER

LOAD

REMOTE

[×10h]

ALARM

RUNNING CONTROL RUNNING MODE

AUTO

MONITOR

TH4 CN3PS4 CN2PS3 CN1 TH5 CN4

1

2

CN11

TAB1

STOP

START

START

SHUTDOWN

SELECT

/WIDE

RESET

REMOTE

FUNC

MENU

+/−

LCD

TAB2

2

1

STR

UP/

DOWN

POWER

CN7

15 12345678

CN23

CN1 CN2

1 9 1 13

CN20

OPERATION INPUT (DC24V)

LOAD/UNLOAD INPUT (DC24V)

OPERATION OUTPUT (TR OUT)

CN19

PID OUTPUT(0-5V)

LOAD/UNLOAD OUTPUT (TR OUT)

PWB2

CN25

485FC

SET

CN17

485EX OPE2 OPE1

PWB1

CN8CN9CN10

321 123 1 5

1

2

123 123 1234 1 9 1 13

CN18

485DP

REFER TO THE INSIDE OF THE AIR

COMPRESSOR, BUT NOT IN THE

CONTROL PANEL

REFER TO THE WIRING DIAGRAM 1

C

REFERENCE:

C

RST

BT

RST

R1 S1 T1

TB0

(G)

(L)

(K)

CT

BATTERY

EMERGENCY STOP

UNLOAD STOP SWITCH

CURRENT TRANSFORMER

BT

CT

ES

USP

(+) 24V

(–) 24E

to

AVR1toAVR2

(+) C

(–) DA

PARTS NAME

LCD MONITOR

DISPLAY PC BOARD

CONTROL PC BOARD

PRESSURE SENSOR (OIL)

PS4

LCD

PWB1

PWB2

SYMBOL

TERMINAL BROCK

TERMINAL BROCK

THERMISTOR (OIL)

THERMISTOR (1ST DIS.)

TB0

TH4

TH5

TB2,3

55

7. WIRING [Wiring Connection Diagram]

7.4.6 Wiring Connection Diagram 2 (400V Class, Inverter Staring (2/2))

C

UNLOAD

STOP

C

DA

DA1

TB2

C

500ms OR MORE

ONE-SHOT INPUT

DC24V

DURING REMOTE OPERATION,

REMOVE SHORT CIRCUIT WIRES.

D1

REMOTE STOP

REMOTE START

AK

33

123456789

24L

STOP

COM1

START

CN12

TR OUT

CAUTION DRY "a" CONTACT(0.5A)

OPERATION DRY "a" CONTACT(0.5A)

Y1

Y1

COM2

SHUTDOWN DRY "a" CONTACT(0.5A)

Y3

Y2

Y2

Y3

to

TB3

4321

CN

USP

SHORT CIRCUIT

Y52A

32

12345

DC24V(+)

CN21 DUAL

AB

DC24V INPUT

REMOTE SETTING

EXTERNAL LOAD/UNLOAD

REMOTE OPERATION

DRYER ANSWER

OPERATION ANSWER

OVER LOAD

to

PWB2 CN2

to

PWB2 CN1

ZY

CN20

OPE2 OPE1

CN25 CN23CN19

SW1SW2

PWB1(HC55)

CN17

to

TB3

12

to

LCD CN9

R2

CE

CE

SP1 5A

RS

115V

460V

BOTH MAIN DISCONNECT MEANS AND BRANCH CIRCUIT

PROTECTION SHALL BE PROVIDED BY THE CUSTOMER.

RP

IN ADDITION,MAIN DISCONNECT MEANS SHALL BE PROVIDED

ON THE LINE SIDE OF THE BRANCH CIRCUIT PROTECTION.

FOR USE ON A SOLIDLY GROUNDED WYE SOURCE ONLY.

CHG

CN18

123 123 12341 91 13 1 5

CN16

PS1

PS2

CN24

1

2

1234123

SUCF

B

A

(B)

(R)

(W)

DS1-2

DS1-1

T2

S2

TH3

CN13

CN11

121

4

(B)

(R)

(W)

PS1 PS2

TH3

63SV

46

ES

R2

R4

C

R2

R4

LF

CE

CE

S2

(G)

90W

60W

TB2

30W

S2

TR

1kVA

46

SP

5A

T1A

CB2

S2

R4

EXTERNAL LOAD/UNLOAD : "a" CONTACT(0.5A)

REMOTE SETTING : "a" CONTACT(0.5A)

10

UNL

REM

OVER LOAD

TH2

TH2

AVR1

(G)

AVR2

(G)

(G)

AVR3

(G)

ES

R2

TB1

CN10

2

C

(+) (−)

(+) (−)

(−)

(+)

CB1

15A

Y52A

TH1

P21

P11

41

41

1

R

DA1

C1

CN9

20UM

42S243

42

CE

CE

S2T2R2

135

CN15

Y52C

Y20

Y42α

Y42 Y21

Y6

Y52

2

D

20A

44DA45

434446

Y52A

CDAC1

X

CE

7

PHASE

DSA

REVERSE

ANS

OVLD

24V1

12345

C DA

Y

to PWB2 TAB2

to PWB2 TAB1

45

(G)

CN3

CN5

CN7

CN4

CN8

CN6

24V2

88F1

46

24E

24V

20W

DA

Y

531 31 753 1 531 31531

CN2

4321 43 21

CN14

CN1

C

1.1A

49M1

Y52A

DA1

DA

CE

S3

S3

17

R4

8

34

48

47

to TB3

C

UVW

CE

CE

CE

K

S

CE

37

RY21X

S3

52X

31

88F

RUN

CM2

X

12

to

LCD CN7

IM2

0.4kW

460V/1.0A

RY

SP

52X

Y

21X

S

S

390Ω

Z

SN

K

CE

CE

K

FM

(G)

CLASS 2 CONTROL CIRCUIT

C

R3D
S2
R3V
S2
R3V
S1

37

S3

TB2

CE

CE

CN38

CE

CN42

CE

CE

CN43

CE

CE

CN39

CE

A

0

8H0

FW

P24

PLC

CM1

SN

RP

(−)

SN

SP

INV

(+)

R3D

S2

R3D

S2

CE CE CE CE

R3V

S2

CE CE CECE

R3V

S2

S2 R3V

CE CE

37

S3

CE CE

37S3

CE CE

K

S

52X

49M1

88F

14

K

S

CE

FM1

CE

CE

FM2

CE

CE

FM3

CE

CE

21 21 21 21

L

OI

FM4

CE

B

(G)

L

12

AL2

AL1

AL0

CM2

(RUN)11

DIP SWITCH

RESISTANCE

PARTS NAME

CHARGE LAMP

SURGE ABSORBER

LIGHTNING ARRESTER

R

SK

DSA

CHG

SYMBOL

SW1,2

20D220D1

20V2A20V2B

20V2C

REFER TO CONPONENTS THAT ARE

20V1A20V1B

CE

CE

REFER TO THE INSIDE OF THE AIR

REFERENCE:

ACTION

ON AT OPERATION

(LOAD/UNLOAD/AUTO STOP)

DESCRIPTION

OPERATION RELAY

Y1Y2Y3

SYMBOL

RELAY OUTPUT

CONNECTOR

CIRCUIT BREAKER

EMERGENCY STOP

REVERSE PHASE RELAY

SUPPLEMENTARY PROTECTOR

46

ES

CN

SP1

CB1-3

EXTERNAL TO THE AIR COMPRESSOR

PACKAGE

REFER TO THE WIRING DIAGRAM 2

COMPRESSOR, BUT NOT IN THE

CONTROL PANEL

CD

)

△

ON AT CAUTION

ON AT SHUTDOWN

ON AT MAIN MOTOR RUNNING

ON AT LOAD

(2 SECOND LATER AFTER

ON

AT CONDENSATE DISCHARGE

ON AT MAIN MOTOR RUNNING

OFF AT TO SECONDS LATER

AFTER MAIN MOTOR STOP

CAUTION OUTPUT

SHUTDOWN OUTPUT

OPERATION RELAY

LOAD/UNLOAD RELAY

CONDENSATE RELAY

OPERATION RELAY

Y52

Y20

Y21

Y52A

RELAY

RELAY

DIODE

CONNECTOR

RELAY

TRANSFORMER

LINE FILTER

PLUG IN CONNECTOR

SOLENOID VALVE FOR OMR

SOLENOID VALVE FOR CONDENSATE

MOTORIZED ISOLATION VALVE FOR AIR

DS

CE

AUTOMATIC VOLTAGE REGULATOR

TR

D1

AVR

Y52A

RY21X

52X

20D

LF

20UM

20A

MOTORIZED ISOLATION VALVE FOR WATER

20W

56

RST

3φ

AC460V 60Hz

T1

TB0

RST

TBG

R1

S1

(K)CT(L)

(G)

E

F

DCL

(G)

INV

RST

P

PD

UVW

C

160kW 460V/275A

240kW 460V/399A

W1

W2

V2

IM1

U1 V1

U2

C

OF THE CUSTOMER.

NOTES:

1. SIZING OF ELECTRICAL COMPONENTS NOT SUPPLIED BY HITACHI IS THE RESPONSIBILITY

2. RATED DRY CONTACT IS AC110V 0.5A (MAX)

3. SIGNAL INPUT FOR REMOTE OPERATION IS DC24V

4. BRANCH CIRCUIT PROTECTION SHALL BE 460V/550A (160kW) MAX, 460V/700A (240kW) MAX.

UL LISTED DUAL ELEMENT TIME DELAY BRANCH CIRCUIT TYPE FUSES.

5. FIELD WIRING CONDUCTOR SHALL BE 3/0MCM×2 (160kW) 300MCM×2 (240kW).

6. USE LISTED PRESSURE TERMINAL CONDUCTORS SUCH AS A RING TYPE.

7. CONNECT MAXIMUM 3 FIELD WIRING CONDUCTOR TO ONE CONDUIT.

FAN MOTOR

PARTS NAME

MAIN MOTOR

MAIN ELECTROMAGNETIC CONTACTOR

ELCTROMAGNETIC CONTACTOR FOR FAN FOR △

52

42

IM1

IM2

SYMBOL

CONTROL PC BOARD

ELCTROMAGNETIC CONTACTOR FOR FAN FOR Y

THERMAL RELAY FOR FAN MOTOR

ELCTROMAGNETIC CONTACTOR FOR FAN

6

88F

49M1

PWB1

LCD MONITOR

SOLENOID VALVE

SOLENOID VALVE

SOLENOID VALVE

DISPLAY PC BOARD

LCD

PWB2

20V1A

20V2A

20V1B

SOLENOID VALVE

PRESSURE DIFFERENTIAL SWITCH

63SV

20V2B

TERMINAL BLOCK

TERMINAL BLOCK

THERMISTOR (2ND DIS.)

CURRENT TRANSFORMER

THERMISTOR (2ND SUCTION)

PRESSURE SENSOR (1ST DIS.)

PRESSURE SENSOR (2ND DIS.)

CT

TB0

PS1

PS2

TH2

TH3

TB1-3

FUSE

INVERTER

EF

INV

8. STANDARD COMPONENTS AND SUBSYSTEMS

8.1 Standard Components

⑴ Air End

A pair of screw rotors rotates while the timing gear
keeps a very small gap between them. This non-con­tacting, high-speed rotation of the rotors compresses
the intake air. Because oil is not injected onto the
rotors during the compression, an oil-free air is dis­charged.
The air end consists of the following parts:

⑴Rotor s: The surfaces of both the male and

female rotors are finished with a special
heat-resistant coating for maintaining the
minimum gap between the rotors.

⑵Beari ngs: The larger-load male rotor is support-

ed by the bearings that are larger in diame­ter, that is, longer in service life.

⑶Case: A cooling water jacket is provided on the

case to absorb the compressing heat.

⑷Timin g Gears:A pair of the precision-finished

timing gears is mounted on the ends of the
screw rotor shafts. It keeps a very small gap
between the rotors and allows them a non­contacting rotation.

⑸Shaft Seal: The sealing mechanism consists of

the air seals and the visco-type seals. The
air seals prevent the compressed air from
leaking from the compression chamber while
the visco-type seals the oil that lubricates
the gears and bearings from entering the
compression chamber.

⑵ Compressor Drive Train

The DSP employs a high efficient, 2-pole, totally
enclosed, fan-cooled motor for the model. The motor
speed is increased to a rated level, each of the first
and second-stage air ends, by the stepup gears in the
gear case.

⑶ Capacity Control System

When a demand of compressed air decreases, the sys­tem closes the suction throttle valve and at the same
time blows off the internal compressed air to the out­side; thus the DSP unloads. For more information,
see page 53.

When demand of the compressed air decreases, the
system reduces the motor speed and purges the
compressed air to atmosphere simultaneously.

⑷ Intercooler

The DSP employs a shell-and-tube type of water­cooled intercooler. The intercooler cools the hot,
compressed air of about 0.20MPa (29 psi) that is dis­charged from the first-stage air end. After reducing
the compressed air temperature down to less than
the cooling water temperature + 15 to 20℃ (59℉ to
68℉),the intercooler separates the condensed water
from the compressed air. The cooled, compressed air
flows into the aftercooler.

⑸ Aftercooler

The DSP employs a shell-and-tube type of water­cooled Aftercooler. Located after the check valve, the
Aftercooler cools the hot, compressed air that is dis­charged from the second-stage air end.
After reducing the compressed air temperature down
to less than the cooling water temperature + 10 to
20℃, the Aftercooler separates the condensed water
from the compressed air.

⑹ Check Valve

Located downstream the second-stage air end, the
check valve prevents the discharge air from flowing
back.

⑺ Lubricating Subsystem

Lubricating subsystem consists of the oil pump, oil
strainer, oil filter, oil cooler, and oil temperature con­trol valve. The oil pump circulates the oil in the gear
case oil sump through the lubricating subsystem and
thereby lubricates the bearings, gears, etc.

⑻ Air Intake Filter

The DSP employs a dry-type air intake filter that is
easily cleaned and replaced.

⑼ Cooling Fan

The small cooling fan cools the inside of the package,
and exhausts the internal compressed air that is
released to atmosphere during the unloading process.

⑽ Starter

Either starter employs a printed circuit board on
which a microprocessor is mounted, and thereby you
can easily choose an operation mode and control func­tion. Both the models come standard with the termi­nals for a remote operation.

⑾ Enclosure

The enclosure panels are attached with the sound
absorbing materials. The front enclosure panel
includes a door that eases your maintenance services.

57

8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil Flow]

8.2 Air/Oil Flow

Compressor Air Flow

Intake air is compressed and heated by the 1st stage air
end; its pressure is built up to approximately 0.20MPa
(29 psi). The heated air is cooled down to the cooling
water temperature + 15 to 20℃ (59℉ to 68℉). The air
is further compressed and heated by the 2nd stage air
end; its pressure is built up to a rated level.
The reheated air flows through the check valve to the
aftercooler. The compressed air is cooled down to less
than/equal to the cooling water temperature + 13℃
(55.4℉) by the aftercooler and discharged to a plant air­line pipe.

Oil Flow

Oil sump is located in the bottom of the gear case. Oil
flows through the oil strainer with a 120-mesh filter
screen to the oil pump driven by a dedicated motor.
After filtration through the oil filter with 5μm filter fine-
ness, cooled oil lubricates 1st stage air end, 2nd stage air
end bearings and gears of speed-up devices.
The oil is collected in the gear case and recycled.

Gear Case Vent Pipe

A small quantity of compressed air leaks from the air
ends into the gear case; the gear case is internally pres­surized. The extended gear case vent pipe relieves the
internal pressure to the outdoors; thus it prevents an
abnormal rise of the gear case internal pressure.

Cooling Air Flow

A small quantity of compressed air leaks from the air
ends into the gear case; the gear case is internally pres­surized. The extended gear case vent pipe relieves the
internal pressure to the outdoors; thus it prevents an
abnormal rise of the gear case internal pressure.

Cooling Water Flow

Cooling water remove heat from the intercooler, the
aftercooler, the oil cooler and the casing of air ends Refer
to “Cooling Water Flow Diagram” about each route of
cooling water flow in the package (

page 59).

58

Flow Diagram

A

8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil Flow]

Compressed Air Flow and Oil Flow

Suction

67

ir Intake for a

Compressor

62

63SV

22

53

21

66

63

65

31

32

3

38

33

64

24

61

68

37

4

PS1 TH2

23

51

1

2

PS4

Cooling Water Flow

Exhaust

25

36

TH3 TH5

Legend

Compressor Air Flow［⇨］

1 First-Stage Air-End

TH4

5

35

34

7

7

6

6

38

52 9 9

8

8

13

1312

14

14

PS2

Compressed
Air Discharge

10

15

15

2 Second-Stage Air-End
3 Gear Case
4 Stepup Gear
5 Motor
6 Intercooler
7 Check Valve
8 Aftercooler

9 Safety Valve
10 Discharge Air Outlet
12 Check Valve
13 Y-type strainer
14 Solenoid Valve
15 Orifice

Capacity Control & Blowoff Air Flow

21 Air Intake Filter
22 Suction Throttle Valve
23 Blowoff Valve
24 Blowoff Silencer
25 Blowoff air cooler

Oil Flow［→］

31 Oil Strainer
32 Oil Pump
33 Relief Valve
34 Oil Filter
35 Oil Cooler
36

Oil Temperature Control Valve
37 Gear Case Vent Pipe
38 Oil Drain Valve

1st-Stage Air-End

Suction

Blowoff air cooler

Aftercooler

Cooling Air Flow and Enclosure

51 Ventilating Fan
52 Enclosure
53 Air Intake Duct

Oil Mist Remover (OMR) Flow

Compressed
Air Discharge

61 Element
62 Filter-integrated Regulator
63 Solenoid Valve

Cooling Water
inlet

64 Ejector
65 Air Pressure Gauge
66 Relief Valve
67 Vacuum Indicator
68 Float Trap

Legend of Sensors and Switches

2nd-Stage Air-End

Oil Cooler

Intercooler

Drain Valve

Cooling Water
Outlet

Symbol

PS2

Pressure Sensor (discharge air pressure)

PS4

Pressure Sensor (oil pressure)

PS1

Pressure Sensor (interstage pressure)

TH2

Temperature Sensor (2nd-stage in)

TH4

Temperature Sensor (1st-stage out)

TH3

Temperature Sensor (2nd-stage out)

TH5 Temperature Sensor (oil)

Pressure Differential Sensor

63SV

(For suction Filter clogging detection)

Description

59

8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil Flow]

A

Flow Diagram (Variable Speed Drive Control)

Compressed Air Flow and Oil Flow

Exhaust

51

37

1

2

PS4

Suction

67

ir Intake for a

Compressor

62

63SV

24 23 22 2223 24

53

21

66

63

65

31

32

3

38

33

61

68

64

4

PS1 TH2

Cooling Water Flow

25

TH3 TH5

Legend

Compressor Air Flow［⇨］

1 First-Stage Air-End

TH3

5

36

34

7

7

6

6

35

38

52 9 9

8

8

13

1312

14

14

PS2

Compressed
Air Discharge

10

15

15

2 Second-Stage Air-End
3 Gear Case
4 Stepup Gear
5 Motor
6 Intercooler
7 Check Valve
8 Aftercooler

9 Safety Valve
10 Discharge Air Outlet
12 Check Valve
13 Y-type strainer
14 Solenoid Valve
15 Orifice

Capacity Control & Blowoff Air Flow

21 Air Intake Filter
22 Blowoff Valve (1)
23 Blowoff Valve (2)
24 Blowoff Silencer
25 Blowoff air cooler

Oil Flow［→］

31 Oil Strainer
32 Oil Pump
33 Relief Valve
34 Oil Filter
35 Oil Cooler
36

Oil Temperature Control Valve
37 Gear Case Vent Pipe
38 Oil Drain Valve

1st-Stage Air-End

Suction

Blowoff air cooler

Aftercooler

Cooling Air Flow and Enclosure

51 Ventilating Fan
52 Enclosure
53 Air Intake Duct

Oil Mist Remover (OMR) Flow

Compressed
Air Discharge

61 Element
62 Filter-integrated Regulator
63 Solenoid Valve

Cooling Water
inlet

64 Ejector
65 Air Pressure Gauge
66 Relief Valve
67 Vacuum Indicator

Drain Valve

Cooling Water
Outlet

2nd-Stage Air-End

Oil Cooler

Intercooler

68 Float Trap

60

8.3 Cooling Water

8. STANDARD COMPONENTS AND SUBSYSTEMS [Cooling Water]

1. Cooling Water Quality

If a cooling tower (open-type circulatory cooling water
system) supplies the cooling water to the DSP, problems
such as corrosion, scale, and slime may be caused by: (1)
higher mineral content due to concentration, (2) contami­nation by foreign matter like insects, and/or (3) produc­tion of algae or bacterium. Use the cooling water of as
good a quality as possible.

① When stopping the DSP, also stop the cooling water

flow. Open the petcock and the water drain valve to
drain the cooling water. Failure to do so may cause the
cooling water pipe to be iced and burst in winter
season. Failure to do so may also cause the air end
case to be overcooled and dewed with the condensate
internally; the cooling water jackets to be attached
with the scale.

Water Relief Pet Cock

Water Drain Valve

② Clean the cooling water subsystem (cooling water

jackets of the first- and second- stage air-ends, inter­cooler, Aftercooler, and oil cooler) periodically.

2. Control of Cooling Water

The service life of the cooling water system depends on
water quality. If the cooling water quality is not good, the
cooler pipes can be corroded, or scale can be generated.
To avoid the problem, periodically sample the cooling
water used and subject it to quality inspection.

3. Quantity and Pressure of Cooling Water

The table below lists desirable cooling water quality that
is applicable to the open type circulatory system.

CAUTION

Performance of Aftercooler and oil cooler var­ies depending on the extent of throttling the
stop valve at the extent of throttling the stop
valve at the cooling water inlet and outlet.
For controlling the cooling water flow rate, use
the stop valve at the outlet leaving the stop
valve at the inlet fully opened.

■ Cooling Water Quality

No

pH [at 25℃]

1

Electrical Conductance [at 25℃] (ms/m)

2

Chloride Ion Cl

3
4

Sulfuric Acid Ion SO

5

Acid Consumption [at pH 4.8] (mgCaCO

6

Total Hardness (mgCaCO

7

Calcium Hardness (mgCaCO

8

Ferrous Substance (mgFe/ℓ)

9

Sulphur Ion S

10

Ammonium Ion NH

11

Ionizing Silica SiO

12

Isolated Carbonic Acid CO

13

Nitric Acid Ion NO

14

Organic Substance (KMnO4 Consumption) (mg/ℓ)

15

Turbidity (mg/ℓ)

Notes:1. System Water is the one that passes through a heat exchanger of circulatory or non-circulatory system.

Make-up Water is the one that is supplied to a cooling tower.

2. Above No. 1, 2, 4, 5,7 〜 12 are based on the standard: JRA-GL-02-1994.JRA:（Japan Refrigeration and Air Conditioning Industry Association）
3. The above criteria does NOT give any assurance of trouble-free or problem-free conditions due to other and time-depending factors but the minimum

requirement.

ー

(mgClー/ liter)

2ー

(mgS2ー /ℓ)

Item Make-up Water

2ー

4

(mgNH

4

(mgSiO2 / liter)

2

ー

(mgNO3 ー /ℓ)

3

(mgSO

/ℓ)

3

3

+

/ℓ)

4

(mgCO2 /ℓ)

2

2ー

4

/ℓ)

/ℓ)

/ℓ)

3

6.0 to 8.0
less than 30
less than 50
less than 50
less than 50
less than 70
less than 50

less than 0.3
Not detected
less than 0.1

less than 30

less than 4

less than 0.5

less than 10
less than 10

System Water Used

6.5 to 8.0

less than 80
less than 200
less than 200
less than 100
less than 200
less than 150

less than 1.0

Not detected

less than 1.0

less than 50

less than 4

less than 0.5

less than 10

less than 10

Problem

Corrosion Scale

○
○
○
○

−

−

−
○
○
○

−
○
○
○
○

○
○

−

−
○
○
○
○

−

−
○

−

−
○
○

■ Quantity and Pressure of Cooling Water

Model DSP-132WN DSP-145WN DSP-160(V)WN DSP-200WN DSP-240(V)WN

Maximum Inlet Temperature
Total Flow Rate
Minimum Pressure Differential

(between inlet and outlet)
Temperature Differential

(between inlet and outlet)
Water Pressure MPa (psi) 0.15 (22) to 0.49 (71)

℃ (℉)

ℓ/min (cmf)

MPa (psi) 0.10 (15)

℃ (℉)

200 (7.1) 210 (7.4) 240 (8.5) 300 (10.6) 330 (11.7)

32 (90)

about 10 (50)

61

8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System]

8.4 Capacity Control System

8.4.1 Standard Load-Unload Operation

The unloading process occurs when the compressed air
demand decreases and the discharge pressure rises as
high as cut-out pressure. The pressure sensor (PS)
detects the high pressure and energizes the 3-way sole­noid valve (20Ux), changing its port to port connection.
The control air is now flowing to and pressurizing cham­ber (A) of the suction throttle valve (STV), consequently
closing the suction throttle valve (STV) and unloading

the airend while the blowoff valve opens and exhausts
the internal compressed air to atmosphere.
The loading process occurs when the compressed air
demand increases and the discharge pressure dropped as
low as cut-in pressure. The pressure sensor (PS)
detects the low pressure and 3-way solenoid valve
(20Ux), suction throttle valve (STV), and blowoff valve
work in reverse action and the airend reloads.

STARTING

Suction throttle valve (STV) closed

START button ON

Airend starts rotation to

compress minor amounts of air

Starts in no load

△switch (Reactor short)

3-way solenoid valve (20Ux)

switched over to connect

Chamber (A) & Chamber (C)

Suction throttle valve (STV) opens

Loading

Valve 2

Chamber

Suction Throttle Valve

1st-Stage

Air End

Intercooler

(C)

Air Exhaust Valve

UNLOADING

Air demand decreases

Discharge pipe pressure rises

Pressure sensor (PS) operates

3-way solenoid valve (20Ux)

switched over to pressurize

Chamber (A)

Suction throttle valve

(STV) closes

Blowoff valve opens

Internal air in discharge pipe

is exhausted to atmosphere

Valve 1

(Vacuum Valve)

NC-COM connected for 5 seconds
after reactor is changed over to a
fullvoltage connection.

To Chamber (B)

To Chamber (A)

Chamber

Blowoff air cooler

Chamber

(B)

3

20U

3-Way Solenoid
Valve (3)

(A)

NC

COM

NO

RELOADING

Air demand increases

Discharge pipe pressure drops

Pressure sensor (PS) operates

3-way solenoid valve (20Ux)

switched over to pressurize

Chamber (B)

Suction throttle valve

(STV) opens

Blowoff valve closes

Loading

Blowoff Valve

20US

3-Way Solenoid
Valve (20US)

NO

NC

20U2

3-Way Solenoid

To the

Atmosphere

Valve (2)

COM

NC

COM

NC

NO

COM

NO

Control Line Filter

STOPPING

STOP button ON

3-way solenoid valve (20Ux)

switched over to pressurize

Chamber (A)

Suction throttle valve

(STV) closes

Blowoff valve opens

Internal air in discharge pipe

is exhausted to atmosphere

Compressor stops

Control Air Flow

Starting/Stopping

NO

20U1

3-Way Solenoid Valve (1)

For 20 seconds after starting
with a star-delta starter.

COM

NC

20U4

3-Way Solenoid
Valve (4)

For 15 seconds after starting
with reactor starter.

Loading

Unloading

62

Orifice

Check Valve

2nd-Stage

Air End

Check Valve

Aftercooler

Pressure Sensor

PS

Compressed Air Discharge

8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System]

8.4.2 Typical Change of Pressure

⑴ Standard Offline-or-Online, 0%-or-100%-Capacity, 2-Step Control

Starting and

110

Pressure

Raising

94

Loading Unloading Loading

Pressure

psi

6

Air Receiver Pressure

⑵ Optional AUTO Operation

Loading

（2） Stop Delay

Repeated
Loading/Unloading

Air Receiver Pressure

Pressure

psi

（1） Stop Delay

(15 minutes)

Starting

and

Pressure

Raising

110

94

6

(30% load)

Time

（3） Start Delay

Time

(10 seconds)

Automatic

Motor Stop

Indications on LCD

Air End Outlet Pressure

Automatic

Motor Restart

Air End
Outlet Pressure

⑴ Stop Delay Time – 10 minutes are required to

keep the motor operating long enough to cool
down sufficiently.
If the third stop extends over 120 minutes,
however, the motor must keep operating for

󱖹 󱖺

more than 30 minutes after restarting.

⑵ Stop Delay Time – The DSP is continually cal-

culating a load ratio. If the load ratio is 30%
and the motor has stopped/restarted maximum
3 times for the past 150 minutes, then the
motor stops.

⑶ Stop Delay Time – 10 seconds are required to

complete blowing off the compressed air and
to be prepared to restart.

⑶ SAVE Mode Operation

Starting

and

Pressure

Raising

Loading

Unloading

Loading

Power Save Operation

load/unload cycling interval

（standard 30 seconds）

Unloading

Loading

Unloading

Loading

Unloading

NOTE:

This is an example of power save operation,
based on the target pressure of：0.67 MPa (97

＊ 97（minimum）

Pressure

psi

110

94

Air Receiver

Pressure

Air End
Outlet
Pressure

6

Time

psi) and the load/unload cycling interval of 30
seconds. The target pressure with an asterisk
may vary depending on the air receiver’s capacity
and the air consumption.

IMPORTANT

If the fixed speed machine is continuously loaded for a long period of time, condensate drain in blowoff air pipe may blowout from
blowoff silencer when unload start. To prevent blowout, air compressor unloads 0.5 second every 30 min when loading continue.

63

8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System]

A

8.4.3 Capacity Control System

1st-Stage

ir End

Intercooler

2nd-Stage
Air End

Air
Intake

Air Intake Filter

1st-Stage
Blowoff Solenoid Valve (2)

1st-Stage
Blowoff Solenoid Valve (1)

2nd-Stage
Blowoff Solenoid Valve (1)

2nd-Stage
Blowoff Solenoid Valve (2)

Check Valve

Aftercooler

Blowoff
Silencer

Pressure

Sensor

Flow of Purging Air and Action of Blowoff Solenoid Valve

Operation Phase

of DSP

Starting Opened fully Closed fully
Loading Closed fully Closed fully
Purging Opened fully Closed fully
Stopping Opened fully Closed fully
Power Interruption Closed fully Opened fully

Action of Blowoff Solenoid Valve

(1) (2)

PS2

Air
Discharge

8.4.4 Relation between Air Consumption Rate and Capacity Control System

Figure in〔 〕are for 0.93MPa models.

※

Air

Consumption

(%)

160VWN
100 to 60

[100 to 70]

240VWN
100 to 55

[100 to 60]

160VWN

60 to 5

[70 to 5]

240VWN

55 to 5

[60 to 5]

5 to 0

The DSP supports the 3 capacity control systems as above.
Depending on the varying air consumption, an appropriate system is automatically selected.
For more information, read the following page.

Operating

Frequency

(Hz)

160VWN

40 to 60

〔40 to 54〕

240VWN

35 to 60

〔35 to 53〕

24

〔24〕

Motor

stopped

Capacity Control System

①

CPCS Motor Speed Control

②

Two-Step Purge
Start/Stop Control

③
Motor Stop/Restart Control
(AUTO operation)

Pressure Settings (MPa)

Setting

Items

Standard

Upper
(purge start)

Lower
(purge stop)

Lower
(motor restart)

Factory

0.75

〔0.93〕

0.77

〔0.95〕

0.72

〔0.90〕

0.72

〔0.90〕

Lower

Example

0.65

〔0.83〕

0.75

〔0.93〕

0.65

〔0.83〕

0.65

〔0.83〕

SW3

Settings

AUTO ON

（INVA）

or

AUTO OFF

（INVB）

AUTO ON

（INVA）

or

AUTO OFF

（INVB）

AUTO ON

（INVA）

IMPORTANT

For changing the pressure settings, see page 27.
For changing the capacity control settings, see pages 25.

64

8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System]

① CPCS Motor Speed Control

Based on the pressure signals detected by the pressure
sensor, the built in circuit board’s CPU performs PID
operations or calculates the motor speed that will meet
the compressed air consumption rate, and then inputs
the calculated results to the inverter. The inverter will
output the instructions of the corresponding frequency to
the motor. The discharge pressure is controlled within a
targeted range due to the increasing and decreasing
speeds of the motor.

CPCS Motor Speed Control by Inverter and CPU

IMPORTANT

PID stands for Proportional, Integral, and Differential.
CPCS stands for Constant Pressure Control System.

Pressure

P: proportional

I: integral

D: differential

Inverter

② Two-Step Purge Control

Two-Step Purge Control is activated if the following con­ditions below occur at the same time:
・The operating frequency drops to 40 (35) Hz (equiva-

lent to 60 (55) % of the air consumption).

・The pressure detected by the pressure sensor rises to

an upper (purge-start) pressure point.
The blowoff solenoid valve (1) will operate to start purg­ing the compressed air (contained between the airend
and the check valve) to atmosphere. The system will
decrease the operating frequency to its lowest operating
frequency, 24 Hz, thus saving power. When the pressure
detected by the pressure sensor drops to a lower (purge­stop) pressure point, the system increases the frequency
to 40 (35) Hz and the blowoff solenoid valve (1) reoper­ates to stop the purging, returning the system control
back to CPCS Motor Speed Control.
（240VWN Models）

Motor

DSP

Compressed

Air

Pressure Sensor

Constant Pressure
of the Discharge Air

IMPORTANT

The differential range between the upper pressure point
and the lower pressure point must be 0.05 MPa or more.

Pressure

Upper Pressure

Standard Pressure

Lower Pressure

①

②

①

Time

Minimum

0.05MPa

Minimum

0.01MPa

③ Motor Stop/Restart Control

Motor Stop/Restart Control will activated under one of
the following conditions:

・Air consumption decreases to about 5 %
・Purge operating continues for 15 minutes.

The system will then automatically stop the motor. For
protection, the motor can only be stopped once every
180 operating minutes. When the pressure detected by
the pressure sensor drops to a lower (purge-stop) pres­sure point, the system will automatically restart the
motor, returning the system control to CPCS Motor
Speed Control.

IMPORTANT

(1) Once the motor has stopped, it cannot restart for 15

seconds.

(2) The plant’s system pressure may drop drastically before

the motor will restart, 15 seconds later. To avoid such
problems, install an air receiver tank of volume larger
than the prescribed one.

Hz＞40 (35)

Operation Frequency Hz

（Q≦60 (55)%）

T＜15 minutes

① ②

CPCS Motor

Speed Control

100

Q (%)

Air Consumption

①

0

Q＞5%

or

Two-Step Purge

Start/Stop Control

② ②

Hz≦40 (35)

Air Consumption Q

or

Purging Time T

N＞1

③

Motor Stop/Restart

③ ③

Q≦5%
 or

T≧15 minutes

Number of

Motor Stopping N

(for 180 minutes)

N≦1

Control

②

Time

65

8. STANDARD COMPONENTS AND SUBSYSTEMS [Outline of Oil Mist Remover Subsystem]

8.5 Outline of Oil Mist Remover Subsystem

The incorporated ejector uses the compressed air to gen­erate a vacuum pressure, which maintains a negative
pressure on the oil mist remover subsystem.
This prevents the gear case internal pressure from rising
due to a resistance of the element. By installing the oil
mist remover:

(1) There is no need to extend a gear case vent pipe out-

doors, avoiding any type of trouble that may be
caused by incorrect installation of the gear case vent
pipe.

(2) Oil mists are prevented from venting from the DSP

gear case to atmosphere, keeping the DSP compres­sor room/area clean.

(3) Oil expenses and labor costs to add extra oil are low-

ered because the oil is automatically recovered in the
gear case.

Relief Valve

Opens when the gear
case internal pressure
excessively rises and
needs relief to
atmosphere.

Element

Utilizes a high performan-

element to separate

ce
the fine oil mists.

A small amount of oil mist is vented from the

gear case vent pipe when starting the DSP.

The plant air system pressure rises

and the ejector operates accordingly.

The oil mist remover internal pressure

maintains a negative pressure.

The element removes oil mists without

Increasing the gear case internal pressure.

The separated oil is recovered in the

gear case and reused by the DSP.

Ejector

Uses the compressed air to
generate a vacuum pressure,
which maintains a negative
pressure on the oil mist
remover subsystem.

Vacuum Indicator

Indicates if the ejector is
operating properly and
keeping the gear case
internal pressure is
negative.

Source of

Compressed Air

Filter

Removes dust particles
and condensate from
the compressed air.

Regulator

Maintains a
constant
compressed air
pressure.

Air Pressure Gauge

Indicates the pressure
of the compressed air
at the inlet of the
ejector.

CAUTION

Float Trap

Opens automatically
when the oil has reached
a specified level,
returning the oil to the
inlet of the oil pump.

Air End

Oil Pump

Gear Case

Solenoid Valve

Closes when the DSP
has stopped, stopping
the consumption of
compressed air by the
oil mist remover.

The oil mist remover reduces oil consumption to almost zero. However, The oil should still be replaced
bi-annually.

66

9. MAINTAINING THE DSP

CAUTION

● Before you service the DSP, carefully read pages 2 through 5, Chapter 1 “SAFETY.”

● Before you service the DSP, disconnect the power; otherwise you may receive an electric shock.

● Before you remove or disassemble a bolt, pipe, or any other part of the DSP, stop it, disconnect the

power, and make sure that the internal pressure has dropped to an atmospheric pressure. Otherwise
the compressed air may gush out of the DSP.

9.1 Air Compressor Maintenance

Daily Operation Control

1

(1) Daily fill the OPERATION RECORD LOGBOOK

p. 88 - 89) and check the operating data and

(
conditions.

If the data deviates from the benchmark in the

logbook, service the DSP.

Maintenance at Periodic Intervals

2

① The DSP standard maintenance schedules are listed

in pages 71 through 74. Periodic maintenance inter­vals in these schedules mean daily, monthly, halfyear­ly, yearly, two-yearly, 4-yearly, and 6-yearly.

They are based on the normal environmental and

operating conditions. If your DSP is in sever environ­mental and operating conditions, service it at more
frequent intervals.

Standard maintenance schedule (A) is based on the

8,000 operating hours per year while (B) 4,000 hours.
Select either (A) or (B) according to your own operat­ing hours per year. If your DSP is in sever (high­humid, dusty, etc.) conditions, however, always select

(2) Regularly drain the condensate and observe the other

daily operating instructions; see pages 6 through 7.

(A) regardless of your operating hours.

② Any of the maintenance intervals is not a warranty

period.

③ If the part you inspected is abnormal, faulty, or dam-

aged, replace it.

④ Do not neglect a yearly maintenance schedule as it is

most important from a preventive maintenance stand­point.

⑤ Use HITACHI genuine parts for replacement.

Overhauling

3

Overhauling consists changing the existing air end
with a new replacement air end.
Overhaul the DSP at 6 yearly.

67

9. MAINTAINING THE DSP [Standard Maintenance Schedule]

9.2 Standard Maintenance Schedule - Air Compressor

SCHEDULE (A) (for yearly 8,000-or-less operating hours)
Follow this schedule (A) if the MAINTenance SCHEDULE: A appears on the display.

○●… Replace △○… Service the DSP by yourself.
△▲… Clean or Check ▲●… Ask your distributor to service the DSP.

Daily/3-Months Schedule

1

Description Maintenance

LCD (Indications) Check
Oil Level Check
Aftercooler Drain - Condensate Drain
Intercooler Drain - Condensate Drain
Control Air Pipe Filter Drain - Condensate

Drain

Motor Grease Greasing

Discharge Pipe
(Compressed Air Discharge)

Intercooler

Ventilating Fan

1st-Stage Air end

2nd-Stage Air end

Air Intake Filter

Oil Mist Remover

Gear Case

(for yearly 8,000-or-less operating hours)

Classification

3-Months

Daily

△
△
△
△
△

Safety Relief Valve

Model/Type Remarks

Fixed/VSD Fill in the OPERATION RECORD LOGBOOK
Fixed/VSD Add as required
Fixed/VSD
Fixed/VSD

Fixed Speed only

Fixed/VSD

△

Blow-off air cooler

Aftercooler

Check Valve

Enclosure

Intercooler

Starter /
Control Box

Oil Pump

Oil Level Gauge

Oil Filling Port

Bi-Annual Schedule

2

(for yearly 8,000-or-less operating hours)

Description Maintenance

Air Intake Filter Clean
Control Line Filter Clean
Aftercooler Drain Pipe Strainer Clean
Intercooler Drain Pipe Strainer Clean
Oil Filter (secondary side)

Check oil press.
Oil Strainer (first side) Clean
Safety Relief Valve - Operation Check
Aftercooler Check/Clean
Intercooler Check/Clean
Oil Cooler Check/Clean
Blow-off air cooler Check/Clean
Capacity Control Device Action Check
Check Valve Leakage Check

Classification

△
△
△
△
△
▲
▲
▲
▲
▲
▲
▲
▲

Instrument Panel

Main Motor

Common Base

Oil Cooler

Oil Filter

Model/Type Remarks

Fixed/VSD

Fixed Speed only

Fixed/VSD
Fixed/VSD
Fixed/VSD Clean if necessary
Fixed/VSD
Fixed/VSD
Fixed/VSD Clean if necessary
Fixed/VSD Clean if necessary
Fixed/VSD Clean if necessary
Fixed/VSD Clean if necessary
Fixed/VSD
Fixed/VSD

68

9. MAINTAINING THE DSP [Standard Maintenance Schedule]

Annual Schedule

3

Description Maintenance

Oil Replace
Joints, Bolts, Nuts Tighten/Check
Air Intake Filter Replace
Oil Filter (secondary side) Replace
Oil Strainer (first side) Clean
Blow-off Valve Sheet Gasket Replace
Suction Throttle Valve Seal Gasket Replace
Thermister, Pressure sensor, PCB, other Electric ports
Aftercooler Drain Pipe Orifice Check/Clean
Intercooler Drain Pipe Orifice & Check Valve
Aftercooler Check/Clean
Intercooler Check/Clean
Oil Cooler Check/Clean
Blow-off air cooler Check/Clean
Purge air solenoid (For purge and anti-reverse rotation in electrical outage)
Demister Check/Clean
Airend Casing Jacket Check/Clean
3-way Solenoid Valve, Drain Solenoid Valve, Capacity Control Device
Safety Valve Check/Clean
Protection, Safety Device Check
Motor Check

(for yearly 8,000-or-less operating hours)

Classification

Check

Check/Clean

Check

Check

○
△
○
○
▲

●

●
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲

Model/Type Remarks

Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD

Fixed/VSD
Fixed Speed only
Fixed Speed only

Fixed/VSD Replace parts if failure found.

Fixed/VSD

Fixed/VSD

Fixed/VSD

Fixed/VSD

Fixed/VSD

Fixed/VSD

VSD only Replace parts if failure found.
Fixed/VSD
Fixed/VSD

Fixed Speed only

Fixed/VSD
Fixed/VSD Replace parts if failure found.
Fixed/VSD Measure insulation resistance and clean.

Replace if necessary.

2-Year Schedule

4

Description Maintenance

Control Line Filter Element Replace
Purge air solenoid (For purge and anti-reverse rotation in electrical outage)
Oil Pump Oil Seal Replace
Oil Pump Bearing Replace
Check Valve Replace
Drain Discharge Solenoid Valve Replace
Check Valve for dranage & control air pipng Replace
Intercooler Drain Pipe Strainer Replace
VFD (Variable Frequency) Check
Cooling Capacity for VFD Replace

6-Year Schedule: Overhauling

5

Description Maintenance

Motor Bearing Replace
Air End Assembly Replace
Bearing – Gear Case Replace
Demister Replace
3-way Solenoid Valve Replace
Oil Strainer (first side) Replace
Motor Shaft Seal parts Check/Clean
Temperature Control Valve Replace
Oil Level Gauge Replace
Battery Replace
Smoothing Capacity for VFD Replace
Control Line Filter Replace

※Discharge Pressure 0.75MPa models：48,000h, Discharge Pressure 0.93MPa models：32,000h

(for yearly 8,000-or-less operating hours)

Replace

Classification

○

●

●

●

●

●

●

●
▲

●

Model/Type Remarks

Fixed Speed only

VSD only
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD

VSD only

VSD only Clean if necessary.

(for yearly 8,000-or-less operating hours)

Classification

●

※●

●

●

●

●
▲

●

●

●

●

●

Model/Type Remarks

Fixed/VSD
Fixed/VSD Replace by overhauled Air End Ass’y.
Fixed/VSD
Fixed/VSD

Fixed Speed only

Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD

VSD only

Fixed Speed only

69

9. MAINTAINING THE DSP [Standard Maintenance Schedule]

SCHEDULE (B) (for yearly 4,000-or-less operating hours)
Follow this schedule (B) if the MAINTenance SCHEDULE: B appears on the M4 display.

○●… Replace △○… Service the DSP by yourself.
△▲… Clean or Check ▲●… Ask your distributor to service the DSP.

Daily/3-Months Schedule

1

Description Maintenance

LCD (Indications) Check
Oil Level Check
Aftercooler Drain - Condensate Drain
Intercooler Drain - Condensate Drain
Control Air Pipe Filter Drain - Condensate

Drain

Motor Grease Greasing

Discharge Pipe
(Compressed Air Discharge)

Intercooler

Ventilating Fan

1st-Stage Air end

2nd-Stage Air end

Air Intake Filter

Oil Mist Remover

Gear Case

(for yearly 4,000-or-less operating hours)

Classification

3-Months

Daily

△
△
△
△
△

Safety Relief Valve

Model/Type Remarks

Fixed/VSD Fill in the OPERATION RECORD LOGBOOK
Fixed/VSD Add as required
Fixed/VSD
Fixed/VSD

Fixed Speed only

Fixed/VSD

△

Blow-off air cooler

Aftercooler

Check Valve

Enclosure

Intercooler

Starter /
Control Box

Oil Pump

Oil Level Gauge

Oil Filling Port

Bi-Annual Schedule

2

(for yearly 4,000-or-less operating hours)

Description Maintenance

Air Intake Filter Clean
Control Line Filter Clean
Aftercooler Drain Pipe Strainer Clean
Intercooler Drain Pipe Strainer Clean
Oil Strainer (first side) Clean
Safety Relief Valve - Operation Check
Aftercooler Check/Clean
Intercooler Check/Clean
Oil Cooler Check/Clean
Blow-off air cooler Check/Clean
Capacity Control Device Action Check
Check Valve Leakage Check

Classification

△

△
△
△

▲

▲

▲

▲

▲

▲

▲

▲

Instrument Panel

Main Motor

Common Base

Oil Cooler

Oil Filter

Model/Type Remarks

Fixed/VSD

Fixed Speed only

Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD Clean if necessary
Fixed/VSD Clean if necessary
Fixed/VSD Clean if necessary
Fixed/VSD Clean if necessary
Fixed/VSD
Fixed/VSD

70

9. MAINTAINING THE DSP [Standard Maintenance Schedule]

Annual Schedule

3

Description Maintenance

Oil Replace
Joints, Bolts, Nuts Tighten/Check
Air Intake Filter Replace
Oil Filter (secondary side)
Oil Strainer (first side) Clean
Thermister, Pressure sensor, PCB, other Electric ports
Aftercooler Drain Pipe Orifice Check/Clean
Intercooler Drain Pipe Orifice & Check Valve
Aftercooler Check/Clean
Intercooler Check/Clean
Oil Cooler Check/Clean
Blow-off air cooler Check/Clean
Purge air solenoid (For purge and anti-reverse rotation in electrical outage)
Demister Check/Clean
Airend Casing Jacket Check/Clean
3-way Solenoid Valve, Drain Solenoid Valve, Capacity Control Device
Safety Valve Check/Clean
Protection, Safety Device Check
Motor Check

(for yearly 4,000-or-less operating hours)

Classification

Check oil press.

Check

Check/Clean

Check

Check

▲
▲

○
△
○
△
△
▲

▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲

Model/Type Remarks

Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD Replace if necessary.
Fixed/VSD
Fixed/VSD Replace parts if failure found.
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD

VSD only Replace parts if failure found.
Fixed/VSD
Fixed/VSD

Fixed Speed only

Fixed/VSD
Fixed/VSD Replace parts if failure found.
Fixed/VSD Measure insulation resistance and clean.

8,000h or 2 years whichever comes earlier.

Replace if necessary.

3-Year Schedule

4

Description Maintenance

Oil Filter (secondary side) Replace
Control Line Filter Element Replace
Blow-off Valve Sheet Gasket Replace
Suction Throttle Valve Seal Gasket Replace
Purge air solenoid (For purge and anti-reverse rotation in electrical outage)
Check Valve Replace
Oil Pump Oil Seal Replace
Oil Pump Bearing Replace
Drain Discharge Solenoid Valve Replace
Check Valve for dranage & control air pipng Replace
Intercooler Drain Pipe Strainer Replace
VFD (Variable Frequency) Check
Cooling Capacity for VFD Replace

※NOTE: Replace every two years if you are using a power save operation.

6-Year Schedule: Overhauling

5

Description Maintenance

Motor bearing Replace
Air End Assembly Replace
Bearing – Gear Case Replace
Demister Replace
3-way Solenoid Valve Replace
Oil Strainer (first side) Replace
Motor Shaft Seal parts Check/Clean
Temperature Control Valve Replace
Oil Level Gauge Replace
Battery Replace
Smoothing Capacity for VFD Replace
Control Line Filter Replace

(for yearly 4,000-or-less operating hours)

Classification

Replace

(for yearly 4,000-or-less operating hours)

Classification

●

●

●

○
○

●

●

●

●

●

●

●

▲

●

●

●

●

●

●

●
▲

●

●

●

●

Model/Type Remarks

Fixed/VSD

Fixed Speed only
Fixed Speed only
Fixed Speed only

VSD only
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD

VSD only

VSD only Clean if necessary.

Model/Type Remarks

Fixed/VSD
Fixed/VSD Replace by overhauled Air End Ass’y.
Fixed/VSD
Fixed/VSD

Fixed Speed only

Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD
Fixed/VSD

VSD only

Fixed Speed only

※
※

71

9. MAINTAINING THE DSP [Oil Mist Remover Maintenance]

9.3 Oil Mist Remover Maintenance

① To keep your Oil Mist Remover in good operating

conditions for a long term, service it according to the
standard maintenance schedule below.

② The standard maintenance schedule is listed below.

Periodic maintenance intervals in this schedule are
based on the normal environmental and operating
conditions. If your Oil Mist Remover is in severe
environmental and operating conditions, service it at
more frequent intervals.

Part or Item Daily

Regulator - Settings

Vacuum Indicator

Safety Relief Valve

Regulator - Performance

Float Trap - Nozzle

Vacuum Indicator

Air Filter - Element

Remover - Element

Air Filter - Element

Safety Relief Valve - Sheet & Spring

Vacuum Indicator

Ejector

Bi-Annually

△
△
△

Annually

△
▲
▲
▲

●

●

●

●

▲

③ Any of the maintenance intervals is not a warranty

period.

④ If the part you inspected is abnormal, faulty, or dam-

aged, replace it.

⑤ ○●… Replace △▲… Clean or Check
  ○△Service the Oil Mist Remover by yourself.

  ●▲ Ask your distributor to service the Oil Mist

Remover.

2 years 3 years

(8,000Hr

/years)

(4,000Hr

/years)

6 Years

Remark

Disassemble and clean, if necessary.

Disassemble and clean, if necessary.

Disassemble and clean, if necessary.

Disassemble and clean.
Replace if it is too dirty.

Solenoid Valve

Regulator

Ejector Assembly

Solenoid Valve - Coil Assembly

Float Trap-Nozzle Assembly

Pressure gauge

The oil mist remover reduces oil consumption to almost zero. However, The oil should still be replaced
bi-annually.

72

▲

●●

CAUTION

Disassemble and clean.
Replace as required.

Change the assembly whole.

●

●

●

●

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

A

9.4 How to Service the DSP Air Compressor

Before servicing the DSP air compressor, stop it, disconnect the power (turn off the earth leakage (ground) circuit
breaker) and verify that the compressor’s internal pressure has dropped to atmospheric pressure.

The maintenance intervals shown refer to the standard Maintenance Schedule (A).

Air Intake Filter – (Replace Bi-Annually)

1

A differential pressure sensor is provided on the suction
throttle valve to detect the pressure differential across
the air intake filter. When the sensor detects a pressure
differential as large as 4.98 kPa (0.7 psi) during operation,
AIR FILTER CLOG appears on the display. If this occurs,
clean or replace the air intake filter in accordance with
Maintenance Schedule (A) or (B). The procedure for
cleaning the air intake filter is as follows:

① Stop the DSP air compressor and turn off the main

power supply.

② Open the upper-left cover.

Upper-Left Cover

ir Intake

Filter Cover

Wing Nut

If the air intake filter is clogged with dust/dirt particles, less air is taken in and discharge air temperature
rises. If the compressor room environment is dusty or dirty, service the air intake filter more frequently
than instructed on the Maintenance Schedule.

Air Intake Filter

Differential
Pressure
Sensor

CAUTION

③ Remove the filter cover and wipe away the dirt from

inside the filter duct.

④ Loosen the wing nut and remove the filter element.

Remove large dirt by tapping the filter element lightly,
and clean the inside by blowing the remaining dirt
with compressed air.

⑤ If the filter element is excessively dirty, clean by

immersing in for about 30 minutes in a neutral deter­gent diluted with water. After doing so, rinse well
with clean water (max. water pressure 0.27 MPa (39
psi)). Shake off the excess water and allow it to dry.

⑥ After making sure the filter element is dry, mount the

filter element in the filter duct and fasten with the
wing nut.

Drain check (intercooler, after cooler) (daily), strainer element (for

2

drain) cleaning (bi-annually) orifice cleaning (annually)

■ Drain condition check

Condensate may drain from the compressor according to operating conditions (high humidity, etc.).
Check the drainage daily, periodically inspect and clean the strainer and orifices. For details concerning how to check

the drainage, see page 6. The solenoid valve of the intercooler and after cooler operates automatically every 20 seconds
to discharge water together with air.

73

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

■ Strainer element cleaning

[Strainer cleaning]

Strainer

Element

O-ring

Cover

Tighten

Loosen

  The strainers for both the intercooler and after cooler

must be cleaned.

① Stop the DSP air compressor and shut off the main

power supply. Shut the gate valve of the discharge
piping.

② Make sure no air is coming out of the drain open-

ing (pressure is not applied to the strainer).

③ Remove the screws from the rear-left lower cover

with a screwdriver (see part No. 908, page 101).

④ Remove the cover of the strainer.
⑤ Remove the element from inside the strainer and

wash with water, etc.

⑥ Return the clean element to its former position in

the strainer.

[Valve condition during conventional operation]

Aftercooler side

Bypass Valve pipe

Solenoid valve for drain

Ⓔ

Orifice

Strauner

Orifice

Strauner

2-way valve B

Intercooler side

Bypass Valve pipe

Ⓒ

2-way valve A

Solenoid valve for drain

Ⓐ

3-way changeover
valve I

[ Procedure for disassembling the strainer

element during operation]

Aftercooler side

Ⓕ

2-way valve B

Intercooler side

Ⓔ

Ⓓ

Ⓐ

3-way changeover
valve I

Ⓑ

Ⓒ

2-way valve A

■ Cleaning the strainer element while the

compressor is running

  If the strainer needs to be cleaned while the compres-

sor is running, consult with your dealer or Hitachi
Service Station. Under ordinary circumstances, pres­sure is applied to the strainer while the compressor is
running. You should therefore exercise maximum cau­tion when removing the strainer.

(1) Intercooler side

① Switch 3-way changeover valve I on the intercool-

er side from the “A” side to the “B” side.

② Remove the element. Pressure is applied to the

strainer, so be extremely careful when opening the
cover of the strainer.

③ Clean the element and mount it by performing the

procedure in reverse order.

④ Switch 3-way changeover valve I on the intercool-

er side from the “B” side to the “A” side.

(2) After cooler side

① Switch 2-way valve A on the after cooler side from

the “C” side to the “D” side.

② Make sure 2-way valve B is fully closed (“E” side).

In this state, strainer side pressure is drained.

③ Remove the strainer element. If 2-way valves A

and/or B are opened even the slightest amount,
pressure is applied to the strainer. You should
therefore make certain that the valves are fully
closed.

④ If 2-way valve B is opened to the “F” side in this

state, condensate can be drained while cleaning
the strainer element.

⑤ Place the cleaned element in its former position in

the strainer and mount by performing the proce­dure in reverse order.

⑥ Switch 2-way valve A on the after cooler side from

the “D” side to the “C” side. Also make sure
2-way valve B is fully closed.

74

[Orifice cleaning]

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

■ Orifice cleaning

  Inspect and clean the orifices annually. Be sure to turn

the compressor off before inspecting and/or cleaning
the orifices.

■ Strainer element / solenoid valve of drain

replacement

  Replace the solenoid valve of the drain and the strain-

er element every 2 years (if operating 8000 hours per
year) or 3 years (if operating 4000 hours per year)
with new parts.

Orifices

CAUTION

● Make sure a minute quantity of condensate

drains from the intercooler discharge port
every 20 seconds when loading the com­pressor.

● If no condensate comes out, clean the

strainer element and orifices.

● If the compressor is operated with no con-

densate being discharged, it could cause
the inside of the compressor to rust and
could result in a serious accident.

75

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

Check Safety Relief Valve Operation – (Bi-Annually)

3

① Maintain the rated maximum discharge pressure of

Rear-Left-Upper Cover

the DSP (0.75, 0.86, 1.0 MPa (110, 125 145 psi)
whichever is applicable).

Rear- Center
Cover

Lever of
Safety Relief Valve

Lever of
Safety Relief Valve

Oil - (replace every 8,000 operating hour or 2-year, whichever comes earlier)

4

② Remove the rear-left-upper cover and rear-center

cover,and pull the lever of safety relief valve.

③ Verify that the safety relief valve operates properly

and let go the lever of the safety relief valve.

Some models are equipped with the safety relief valve

without the chain. For checking the safety relief valve
operation of these models, turn the top cap of the
safety relief valve anti-clockwise to blow. After check­ing, turn the cap clockwise and close it.

WARNING

During inspection of the operation of the safety
relief valve, use the appropriate facial protec­tion. High pressure air containing dust particles
can cause severe injury.

① Place a oil receiver under the oil-draining valves

(1, 2), remove the oil.

Oil port cover

Oil pan

Oil drain valve (1)

Oil pan

Oil drain valve (2)

Oil Cooler

② Replace the lubricating oil twice a year and clean the

bottom of the oil casing once a year. Wipe away the
sludge that builds up on the bottom of the oil pan of
the oil casing with a sponge and replace with new oil.

③ Remove the oil filling port plug, and fill the oil until

the oil reaches the upper red line of the oil level
gauge.

④ Check the Filling port and oil-draining valves (1, 2)

are surely seated.

WARNING

● Change the oil regularly, as instructed in the

standard maintenance schedule (
68-71). Neglecting to change the oil causes
oil deterioration that could result in clogging
of the oil strainer and a fire.

● Be sure to use the recommended lubricating

oil given on page 7. Absolutely DO NOT mix
different types of lubricating oil.

● Overfilling with lubricating oil may increase

shaft power and result in rise in oil tempera­ture. Do not overfill with lubricating oil.

page

76

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

Clean Oil Strainer (primary side) – (Bi-Annually)

5

① Remove the cleaning cover. Remove and clean the oil

strainer.

② Replace the strainer element when overhauling the

DSP.

Oil pressure drops if the oil strainer becomes clogged.
If oil pressure drops to 0.08 MPa or lower, the oil pressure
relay automatically shuts the compressor off.

Oil Strainer Cleaning Cover

IMPORTANT

Oil Filter (secondary) – (Replace Annually)

6

Oil Pan

Oil Filter

① Stop the DSP air compressor and disconnect the

power.

② Remove the lef door.

③ Place a pan under the oil filter.

④ Remove the oil-draining plug to drain out the oil in the

oil filter.

⑤ Use a filter wrench to loosen and remove the oil

filter from the oil filter support of the gear case.
Remove the oil filter element.

⑥ Apply clean oil onto the filter O-ring. Tighten the oil

filter until the O-ring surface comes in contact with
the oil filter seating surface.

⑦ Seat the oil filter O-ring by tightening the filter with

both hands. Immediately after compressor restart
verify that there is no leaks on the oil filter.

IMPORTANT

Oil pressure drops if the oil strainer becomes clogged.
If oil pressure drops to 0.08 MPa or lower, the oil pressure
relay automatically shuts the compressor off.

77

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

Clean Control Line Filter (Bi-Annually) [Fixed Speed]

7

Control Line Filter

Level Gauge

Check Valve – (Replace, 2-Yearly)

8

① Press the STOP button, and disconnect the power.

② Open the after cooler condensate drain valve to

depressurize the inside of the air compressor. Verify
that no compressed air is discharging out of the drain
valve. The control line filter must to be de-pressur­ized before conducting any service on the filter.

③ Remove the left door.

④ Remove the control line filter element, and then use

an air nozzle to blow out the inside surface (reverse
flow action) of the control line filter element in order
to remove any dust particles.

⑤ Replace the element at least every 2 years.

１

Depressurizing the System



① Close the stop valve on the discharge air pipe.

Check valve cover

Check valve

Rear-upper­cover

Check valve
cover

② Open the condensate drain valve of the aftercooler to

release the compressed air. Check the LCD and verify
that the DIScharge PRESSure shows 0 MPa (or the
atmospheric pressure).

2

Removing the Enclosure Panels



① Remove the rear-upper-cover.

3

Disassembling



① Disconnect the discharge pipe from the check valve

cover, and remove it.

② Remove the fastening bolts of the check valve cover.

③ Remove the check valve cover, the gasket check valve

and gasket, in that order.

4

Cleaning and Checking



① Sufficiently clean the check valve seat. Make sure

that no rust particles and/or fragmented gaskets are
left on the valve contacting surfaces.

78

② Sufficiently clean the check valve and check valve

cover. Make sure that no rust particles and/or frag­mented gaskets are left on the packing contacting sur­faces.

Clean Coolers

9

Wire-Brush

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

● Oil Cooler

Scale Removal
Remove the oil cooler water chamber cover. Flush

with Rydlymeand use a brass wire brush to remove
the scale from the inner surfaces of the oil cooler
tube nest.

Oil Cooler

● Aftercooler/Intercooler

If scale build up occurs often, contact the local

Hitachi distributor for scale removal.

79

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

Battery replacement

10

Item Specs

Battery Button type lithium battery

Voltage 3V

Battery model

Capacity CR2032 equivalent

Special specs

Replacement criteria

Life

Fastening tabs

Mounting screws

②

⑤

Lead wire connector connection

Battery replacement display on LCD monitor

Approx. 1 year with power off

Approx. 6 years under ordinary service conditions

④

CN11 BT

220mAh

③

Special tool openings

Battery

LCD unit board

(1) Battery life and specifications

● Commercially available batteries cannot be used.

Order batteries from your dealer.

● To replace batteries, turn off the power and replace

within 15 minutes.

(2) Battery replacement method

When “battery replacement” is displayed for “Setting
/ connection inspection” on the LCD monitor, replace
the batteries. Be sure to turn the compressor off
before replacing the batteries.

① Remove the mounting screws on the part where

the buttons are to the right of the LCD unit.

② Insert the special tool that comes with the com-

pressor in the openings provided in 2 locations on
the right side of the LCD unit and remove the LCD
unit by lifting.

③ There are tabs for fastening the LCD unit on the

left side of the unit. When removing the LCD unit,
carefully pull out the right side so it comes off the
operation panel from the right.

④ The batteries are mounted on the back of the LCD

unit. Unplug the batteries from the connector. The
batteries are held in place by double sided adhesive
tape.

⑤ Replace with new batteries.

Precautions concerning disposal of old batteries

(3)

Either return used batteries to your dealer or

properly dispose of them through an industrial

waste disposal contractor in accordance with

the “Law concerning disposal and cleaning of

discarded materials.”

Used batteries are furthermore shorted if the posi-

tive and negative terminals come in contact with each
other or come in contact other metal objects, and
could cause the batteries to produce heart, rupture or
catch fire. Do not expose the batteries to fire. Used
batteries cannot be recharged.

80

Motor - (Servicing)

11

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

① Checking the operating temperature

The motor coil has a specified maximum allowable

temperature rise of 100℃ (212℉), based on an ambi-
ent temperature off 40℃ (104℉).

If the motor is unusually hot during normal operation,

regardless of the specified temperature rise, investi­gate the cause of the excessive heat utilizing the
Motor Diagnostics and Troubleshooting chart
below.

② Cleaning

Clean the motor periodically to prevent dust particles

from accumulating inside and outside of the motor.

When servicing the DSP, measure the insulation

resistance of the motor coil with a 500V megohmme­ter and verify that the insulation resistance is 1MΩ
or more.

Motor Diagnostics and Troubleshooting

③ Disassembling

In a severe environment (dirty, corrosive, high dust or

high powder), disassemble and service the motor
every two years. In a normal environment, disassem­ble and service the motor every four years. For
the most common motor problems, see the Motor
Diagnostic and Troubleshooting chart below.

If the problem cannot be solved with the chart, con-

sult the local Hitachi distributor.

Phenomenon

Heated

Excessive Sound

Excessive Rotation

Cause

Loose botls

Installation

Poor gounding

Inadequate breaker capacity

Broken wires

Wiring

Failed starter and switch contact

Dust accumulation reduced cooling performance

Excessive ambient operating temperature

High humidity

Large external vibration/shock

Environment

Phase-lacking operation

Widely dropped voltage

Fluctuating voltage

Power Supply

Overload

Thrust force by the machine

Load

Excessive bearing noise NOTE 2

Burnt motor coil NOTE 2

NOTES:

1. ◎ : Close relationship between the cause and type of problem, ○ : relationship between the cause and type of problem.

2. Detect the fundamental cause of the problem and take corrective action.

3. Breaker, switch and starter are hot.

○◎○

◎◎○◎ ◎○
○○◎◎
○○○○

○○◎
◎◎◎○
○○ ○ ◎◎◎○

Excessive Vibration

NOTE3

○

○

NOTE3

○

○
○

◎○◎

◎

○◎◎○

Frame

Thermal Relay Tripped

Bearing

◎

breaker Tripped

Electric Leak

Low Insulation Resistance

Retighten the bolts.

Ground properly.

◎

Replace with properly specified capacity breaker.

Install new wires.

Check the contacts and replace if necessary.

Properly clean motor.

Improve the room ventilation or contact the local Hitachi distributor.

Contact the local Hitachi distributor.

◎

Take vibration and shock measurements.

Check the wire thickness and length and contact the
local power utilities company.

Contact the local power utilities company.

Check the DSP capacity control system.

Center the shaft.

Contact the local Hitachi distributor.

Contact the local Hitachi distributor.

Corrective Action

81

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

Main Motor Greasing (Every 3-Months)

12

The main motor bearings on both the load-side bearing
and anti-load-side require grease replenishment each 3
months.

① Remove the front-left-door.

② Use a grease gun (out of scope of supply) to grease

the bearings.

Anti-Load-Side
bearing grease port

Load-Side
bearing grease port

③ Use “Raremax Super N” manufactured by KYODO

YUSHI CO.,LTD. as the standard motor bearing
grease. (Hitachi part name: RMS grease, Part
No.455)

④ Periodically clean the grease pan.

IMPORTANT

● Contact your local authorized distributor or master

dealer for the purchase of approved Hitachi grease.

● Main motor is to be greased only when it is operating.

● Grease pan should only be cleaned when the com-

pressor is not operatong.

Grease replenishment amount

Model

DSP-132WN
DSP-145WN
DSP-160WN, (VWN)

DSP-200WN
DSP-240WN, (VWN)

Load-Side bearing

140g 140g

250g 250g

Anti-Load Side bearing

Grease pan

Grease pan

● Grease gun example
  Lever-type grease gun made by Yamada Corporation

(CH-400 Micro-hose [pin type SPK-1C])

CAUTION

The proper amount of grease must be applied to the main motor to ensure that there is no leakage and/
or overheating of the bearings. Ensure that the main motor is properly greas ed during the commission­ing of the start-up of the compressor. If the compressor has not been operational for (3) months grease



when restarting.

Following "9.1 Air Compressor Maintenance" on page 67 and "9.2 Standard

Maintenance Schedule (A)(B)" on page 68 to 71, replace the main motor bearings periodically.

82

Oil Mist Remover

13

9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]

1. Oil Mist Remover Element - (Replace Annually)

① Remove the pipe (between the top of the oil mist

remover housing and the ejector) as required.

Remove the 4 set screws from the oil mist remover

housing.

Pull up the upper part of the housing.

② Remove the nut and the cover. Then, remove the ele-

ment.

③ Install a new element. Carefully seat the upper and

lower rubber gaskets on the element without allowing
any gaps.

④ Grease the O-ring,

replace the housing,
and tighten the set
screws diagonally
and evenly.

Set Screw

φ8

3/8

φ12

Nut

Cover

Rubber Packing

Element

O-Ring

Rubber Packing

3. Relief Valve (Replace the sheet and spring Annually)

① Turn the nut and remove the plate. Replace the sheet

and the spring with new components.

② Assemble all the parts with placing the spring at the

center of the valve.

4. Vacuum Indicator (Clean Bi-Annually and

Replace Annually)

① A dirty vacuum indicator may malfunction. Clean

Bi-annually and replace annually.

② Hold up and pull down the locked pipe joint. Pull down

the vacuum indicator.

Nut

Plate

Relief Valve

Spring

Sheet

Locked Joint

Pull down

Vacuum Indicator

2. Filter/Regulator - (Replace the filter, ele­ment, diaphragm, valve stem Annually)

① Hold down, turn, and pull down the lever on the cover.

Remove the cover and baffle and replace the element
with a new element.

② Remove the upper 4 set screws and remove the upper

part of the regulator. Replace the diaphragm and the
valve stem with new components. Be careful not to
install the new diaphragm upside down.

Set Screw

Diaphragm

Valve Stem

Element

Cover

5. Ejector (Clean Annually)

① If the ejector is dirty, performance may be reduced.

Disassemble and clean annually.

② Disassemble and clean as follows.

(1) Disconnect the control air tube at its detachable

connection.

(2) Loosen the nut (the nut can be turned indepen-

dently from the ejector body) and disconnect the
ejector from the manifold.

(3) Remove the plastic case.

(4) Clean the ejector body with a neutral detergent

and dry it with an air nozzle. Assemble all of the
parts.

Baffle

Nut

83

10. PRECAUTIONS WHEN THE COMPRESSOR IS TO BE IDLE FOR AN EXTENDED PERIOD OF TIME

① If the compressor is not to be used for a week or

more, be sure to press the UNLOAD STOP button on
the instrument panel.

The compressor then unloads for 5 minutes and auto-

matically stops when the compressor and its piping
are dry.

IMPORTANT

Unloading the compressor prior to stopping enables
moisture in the second stage air end to be removed.
Drying out the inside of the compressor is an effective
way to prevent rust from developing in the second stage
air end when unused for an extended period of time.

② To prevent the inside of the compressor from rusting,

press the UNLOAD STOP button and dry the com­pressor for 5 - 10 minutes a week.

MONITOR

自動

AUTO

モニタ

MONITOR

メニュー

MENU

＋／−

UP/ 
DOWN

設定

SET

運転管理

RUNNINGCONTROL

［×10h］

表示切替/

ワイド モード
SELECT/WIDE

1

遠方

REMOTE

負荷

故障

SHUTDOWN

2

警報

ALARM

機能

FUNC

リセット

RESET

遠方

記憶

STR

UNLOAD STOP button

運転状況

RUNNINGMODE

LOAD

運転 停止

STARTREMOTE

電源

POWER

起動待ち

AUTOSTART

STOP

UNLOAD STOP

③ Be sure to turn off the power if the compressor is not

to be used for an extended period of time.

CAUTION

● Failure to take measures to prevent rust could result in rusting due to humidity in the atmosphere or

lack of oil film in the bearings, and could cause the compressor to freeze up or could result in
damage to the bearings when operation is restarted.

● The UNLOAD STOP button is not only used when the compressor is to be idle for an extended period

of time; it is also effective way to prevent the inside of the compressor from rusting during routine
operation as well.

■ Performing unload stop during dual/

backup operation and/or multiple unit
control operation (optional)

  If the compressor is to be idle for an extended period

of time, turn off dual/backup operation and/or multiple
unit control operation, press the UNLOAD STOP
button while the compressor is running and dry out
the compressor.

  The UNLOAD STOP button is effective when opera-

tion control is set to “SINGLE.” For information on
operation control settings, see page 19.)

  When restarting operation, return the operation con-

trol to the optional control settings.

84

11. PARTS LIST

Gear Case Assembly

1

459

367

313

317

316

324

337

D53

319

883

D53

383

310

D63

D51

884

338

398

321

304

320

323

B32

327

339

334

399

336

397

D54

326

E83

398

302

307

F43

303

458

397

322

143

E83

F39

301

318

100

375

319

305

D53

883

371

311

D63

243

884

132
134

200

321

D53

177
178

133
135

183
184

277
278

232
234

233
235

283
284

Ref.
No.

100 First-Stage Air End
132
133 Cover, cooling-oil jacket
134
135
143
177
178
183
184
200 Second-Stage Air End
232
233 Cover, cooling-oil jacket
234
235
243
277
278
283
284
301 Gear Case (Upper)
302 Bull Gear
303 Gear Shaft
304
305
307 Gear, oil pump
310 Bearing Nut
311 Snap Ring
313 Support, Bearing
316 Gasket, oil filling port
317 Plug, oil filling port
318 Snap Ring
319 Cap Nut
320 Oil Nozzle (1)
321 Oil Nozzle (2)
322 Gasket, 1st-stage air end
323 Gasket, cleaning cover
324 Cover, Cleaning
326 Gasket, oil pump
327 Oil Pump
334 Parallel Pin (1)
336 Oil Level Gauge
337 Gasket, Bearing support
338 Cover, inspection cover
339 Gasket, inspection cover
367 Cover (2), bearing
371
373 Gasket, bearing cover
375 Parallel Pin (2)
383 Relief Valve
397 Snap Ring
398 Seal Washer
399 Gasket, relief valve
458 Motor Pinion Gear
459 Bearing Cover
883
884 O-Ring
B32 Float
D51 Support, oil filter
D53 O-Ring
D54 O-Ring
D63 Seat, oil pipe
E83 O-Ring
F39 Gear Case (Lower)
F43 Support, oil pump gear

Description

Cover, 1st-stage air end discharge

Gasket, 1st-stage air end discharge cover
Gasket, cooling-oil jacket Cover
Pinion Gear, 1st-stage air end
Cooling oil-jacket upper cover
Gasket, oil-jacket upper cover
Cooling oil-jacket lower cover
Gasket, oil-jacket lower cover

Cover, 2nd-stage air end discharge

Gasket, 2nd-stage air end discharge cover
Gasket, cooling-oil jacket Cover
Pinion Gear, 2nd-stage air end
Cooling oil-jacket upper cover
Gasket, oil-jacket upper cover
Cooling oil-jacket lower cover
Gasket, oil-jacket lower cover

Tapered Roller Bearing 65φ
Tapered Roller Bearing 75φ

Gasket, 2nd-stage air end

Oil Temperature Control Valve

85

11. PARTS LIST

Motor Assembly

2

460

461

306

415

401
453
454
455

370

419

393

391

457

F72

421

F72

425

426

429

Ref.

No.

306 Pinion Gear, oil pump
370 O-Ring
391 Shaft Seal
393 Packing, shaft seal
401 Motor
415 Packing, motor
419 Cover, shaft seal
421 Base, air end
425
426
429
453 Bearing (Load-side)
454 Bearing (Anti-Load side)
455 Grease
457 Pull Gear, motor
460 Gear Stud, oil pump
461 Gear Shaft, oil pump

F72 Grease Pan

Description

Vibration Isolation Rubber
Support Bolt (1), gear case
Support Bolt (2), gear case

86

Air Intake (Fixed Speed)

3

528

509

517
518

541

542

514

529

530

515

537

521
526

D

503

504 519 521
522 549 552

A

525

504 519 521
522 549 552

B

A

536

535

11. PARTS LIST

532

534

508

507

506

C

509

528

541

D

518

517

537

559

558

569

513

F46

F44

511

502

512

555

501

554

521

526

B

549 521 519 504 504 519 521 549522 552 522552

Ref.

No.

500
501 Air Cylinder Assembly
502 Body, STV
503 Tube, air cylinder
504 Cover, air cylinder
506 Piston, blowoff valve
507
508 Plate
509 Spindle, air cylinder
511 Packing, air cylinder
512
513 Packing, STV cover
514 Valve Plate (A), STV
515 Valve Plate (B), STV
517 Piston, air cylinder
518 Seal Packing (3)
519 Seal Packing (4)
521 Seal Packing (5)
522 Bush, air cylinder
525 Tie Rod, air cylinder
526 Cover, air cylinder

Description

Suction Throttle Valve Assembly

Valve Sheet, blowoff valve piston

Packing, air end air intake

C

Ref.
No.

528 Baffle Plate
529 Spring Washer (SUS)
530 Nut
532 Body, blowoff valve
534 Seal Washer, air cylinder
535 Nut
536 Wave Spring
537
541 Holder, piston
542 Spacer
549 Flange, o-ring
551
552 O-ring, air cylinder
554 Cover, STV
555 Cover Packing, STV
558
559
569 Grease, air cylinder
F44 Piston, STV
F46 O-ring

ーー

Description

Gasket, air cylinder piston

Set of Air Cylinder Consumable Parts

Adjusting Bolt, suction bypass valve
Seal Washer, suction bypass valve

87

11. PARTS LIST

Air Intake (Variable Speed Drive Control)

4

513

559

511

502

512

E11

555

554

Ref.

No.

500
502 Body, STV
511 Packing, air cylinder
512
513 Packing, STV cover
554 Unloader Cover
555 Unloader Cover Packing
558

559 Seal Washer
E11 Unloader Cover
F44 Unloader Base
F46 O-ring / Packing

Description

Suction Throttle Valve Assembly

Packing, air end air intake

By-pass Valve adjustment Bolt

558

F44

F46

88

Coolers & Ventilating Fan

5

11. PARTS LIST

625

626

601

624

623

608

605

602

Ref.
No.

404 Ventilating Fan
601 Shell, aftercooler
602 Tube Nest, aftercooler
605
608 Aftercooler Assembly
610 Oil cooler Assembly
611 Tube Nest, oil cooler
612
613
614 Cover, oil cooler
615 Gasket, oil cooler cover
616 Support, oil cooler
623 Intercooler Assembly
624 Shell, intercooler
625 Tube Nest, intercooler
626
628 Base, coolers
629 Support, oil cooler
637
E35
E39

Description

Gasket, aftercooler tube nest

Cover, oil cooler water chamber
Gasket, oil cooler water chamber

Gasket, intercooler tube nest

Vibration Isolation Rubber
Vibration Isolation Rubber
Vibration Isolation Rubber

612

613

616

610

404

611

E35

615

614

E35

629

637

628

616

E39

E39

89

11. PARTS LIST

Oil Pump

6

362

329

328

355

345

356

353

342

363

354

378

343

Ref.

No.

300
327 Oil Pump Assembly
328 Bearing
329 Oil Seal
342 Body
343
345 Key
353 Inner Rotor
354 Outer Rotor
355 Shaft
356 Key
362 Snap Ring
363 O-Ring
378 Bush Bearing

Description

Set of Oil Pump Consumable Parts

Housing, oil pump bearing

Instrument Panel

7

749

757

748

719

744

746

Ref.

No.

719 Digital Panel

744 Lithium Battery

746 Control PCB

748 Seat, instrument panel

749 Display Unit

757 Screw

Description

90

Starter Box (Star-Delta Starting)

8

G81

G20

G19

G02
G03

G18

D75

G15

745

G17

D73

D08

D07

G80

D06

G16

704

G06
G07

702

E50

E50

D12

11. PARTS LIST

D12

C95

G04
G05

708

709

F81

701

729

G04
G05

929

743

931

B44

935

C97

B72

929

931

E48

Ref.

No.

700 Control Panel
701
702
704 Electromagnetic Switch
708 Current Transformer
709 Terminal Block
729
743 Rubber Bush
745 CPU PCB
929 Rubber Bush
931 Handle
935 Hinge
B44 Door
B72 Cover

Description

Electromagnetic Contactor
Electromagnetic Contactor

Electromagnetic Contactor

Ref.

No.

C95 Box
C97 Cover
D06 Terminal Block
D07 Auxiliary Relay
D08 Auxiliary Relay
D12 Cooling Fan
D73 Protective Relay
D75 Transformer

E48 Rubber Bush
E49 Rubber Bush
E50 Rubber Bush
F81 Terminal Block

G02 Conduit Nut

Description

E49

Ref.
No.

G03 Conduit
G04 Conduit Nut
G05 Conduit
G06 Conduit Nut
G07 Conduit
G15 AVR
G16 AVR
G17 AVR
G18 Supplemental Protecter
G19 Supplemental Protecter
G20 Supplemental Protecter
G80 Line Filter
G81 Temperature Switch

Description

91

11. PARTS LIST

Starter Box (Inverter Starting)

9

G06
G07

G04
G05

G80

D73

D08

D07

D06

D75

708

745

709

G18

G19

F81

G20

G16

G81

E50

E02

E50

G17

G15

E03

704

E10

E07

D12

D12

G04
G05

G02
G03

929

B46

C95

931

C96

C97

753

Ref.

No.

700 Control Panel
704 Electromagnetic Switch
708 Current Transformer
709 Terminal Block
745 CPU PCB
756 DC Reactor
929 Rubber Bush
931 Handle

935 Hinge
B44 Door
B46 Inverter Cover
B72 Cover
C95 Inverter Cover
C96 Inverter Cover
C97 Inverter Cover

Description

B44

935

B72

Ref.

No.

D06 Terminal Block
D07 Auxiliary Relay
D08 Auxiliary Relay
D12 Cooling Fan
D73 Protective Relay
D75 Transformer
E02 Inverter Cooling Fan 1
E03 Inverter Cooling Fan 2
E07 Smoothing Condenser
E10 Inverter
E48 Rubber Bush
E49 Rubber Bush
E50 Rubber Bush
F81 Terminal Block

Description

931

E49

Ref.

No.

G02 Conduit Nut
G03 Conduit
G04 Conduit Nut
G05 Conduit
G06 Conduit Nut
G07 Conduit
G15 AVR
G16 AVR
G17 AVR
G18 Supplemental Protecter
G19 Supplemental Protecter
G20 Supplemental Protecter
G80 Line Filter
G81 Temperature Switch

Description

E48

92

Air Piping

10

11. PARTS LIST

874

035

023

024

033

875

022

865

035

034

H41

035

D70

035

044

865

H32

025

H41

044

010

010

875

H32

F66

F04

F65

039

865

D72

004

F06

002

035

003

870

871

870

036

001

F07

026

035

035

002

F02

036

035

H32

026

868

870

871

870

001

F03

865

029

D71

865

H32

H31

021

H33

Ref.

No.

001 Aftercooler Header
002
003 Condensate Separator
004
010
021 Demister
022 Air Piping (1)
023 Air Piping (2)
024 Air Piping (3)
025 Air Piping (4)
026 Air Piping (5)
029 Air Piping (6)
033
034
035 Gasket, 1st-stage
036 Gasket, 2nd-stage
039
044 Intercooler Header
865
868 Cover, check valve

Description

Gasket, aftercooler header

Gasket, condensate separator
Gasket, intercooler header

Gasket (1), discharge piping
Gasket, 1st-stage air end discharge flange

Gasket, 2nd-stage air end discharge flange

Gasket (2), discharge piping

H34

Ref.
No.

870 Gasket
871 Check Valve
874 Discharge Piping
875 Safety Valve
D70 Thermistor (1)
D71 Thermistor (2)
D72 Thermistor (3)
F02 Air Piping (7)
F03 Air Piping (8)
F04 Air Piping (9)
F06 Air Piping (10)
F07 Air Piping (11)
F65
F66
H31 Cooler Header (1)
H32 O-Ring, cooler header
H33 O-Ring, demister box
H34 Demister Box
H41 Cooler Header (2)

−−

Description

Seat, condensate separator
Seat Gasket, condensate separator

93

11. PARTS LIST

Oil Piping (1)

11

F40

F32

Ref.

No.

880 Oil Strainer
882

887 Oil Drain Valve
D34 O-Ring
F12 Oil Drain Valve
F31 Seat (1), oil piping
F32 Breathing Piping
F35 Seat (2), oil piping
F37 Seat (3), oil piping
F40

Description

Oil Filter Element

Support, oil mist remover

F35

F31

880

887

D34

F37

882

F12

94

Oil Piping (2)

12

11. PARTS LIST

D35

773

D35

D81

Ref.
No.

773 Oil Drain Piping (1)
774 Oil Drain Piping (2)
888 Temperature Sensor
D35 O-Ring
D81 Nozzle (1)

D81

Description

D35

888

774

D35

95

11. PARTS LIST

Cooling Water Piping

13

011

009

009

B41

B40

018

Ref.

No.

009 Flexible Piping

011 Pet Cock

017

018

096 Water Drain Valve
B40
B41
D36 O-Ring
F36
F47

Description

Stop Valve, for a water flow control
Seat (4), cooling water piping

Seat (1), cooling water piping
Seat (2), cooling water piping

Seat (3), cooling water piping
Vibration Isolation Rubber

F47

F36

D36

D36

F36

096

017

96

Condensate Piping

14

11. PARTS LIST

045

F48

H36

007

876

047

006

045

F69

876

H36

007

047

006

F67

043

F69

Ref.
No.

006 Y-type strainer
007 Gasket, y-type strainer
043 Check Valve
045
047 Y-type strainer Element
876 Stop Valve
F67 3 way Switching Valve
F69 Support, drain piping
F48
H36 Drain Solenoid Valve (2)

Description

Orifice, condensate piping

Vibration Isolation Rubber

F48

Blowoff Air Piping (Fixed Speed)

15

Only 200W, 240W

E79

E69

E96

E07

901

902

900

E95

036

E94

036

E94

E93

036

036

Ref.
No.

036 Gasket, 2nd-stage
900 Blowoff Silencer (1)
901 Seat (1), blowoff silencer
902
E07
E69 Seat (2), blowoff silencer
E79 Blowoff Silencer (2)
E93 Purge air cooler
E94 Blowoff Air Piping (1)
E95 Blowoff Air Piping (2)
E96 Blowoff Air Piping (3)

Description

Cover (1), blowoff silencer
Cover (2), blowoff silencer

97

11. PARTS LIST

Blowoff Air Piping (Variable Speed Drive Control)

16

902

900

E22

901

E23

E21

E68

D29

E68

E93

036

E21

036

Ref.

No.

036 Gasket, 2nd-stage

900 Blowoff Silencer

901 Seat, blowoff silencer

902 Cover, blowoff silencer
D29 Seat, blowoff piping 1
E21 Blowoff Solenoid Valve
E22 Blowoff Solenoid Valve
E23 Seat, blowoff piping 1
E68 Blowoff Solenoid Valve
E93 Purge air cooler

900

901

Description

902

98