EWWD440~850AAYNNO**
Packaged water-cooled water chillers
4PW25558-1B
Installation and operation manual
13
Explanation common to respective screens
Buttons and indications that appear at the top/bottom of the
screen
■
With the touch of
, the screen shifts to the operation screen.
■
With the touch of
, the menu screen returns.
■
With the touch of
, the screen shifts to the previous screen.
■
With the touch of
, the screen shifts to the next screen.
■
With the touch of
, the screen shifts to the history menu.
■
is indicated while the unit falls at low load stop
(Thermo OFF).
■
is indicated while No. 1 (left) compressor is under
ON-OFF limiting.
■
is indicated while No. 2 (right) compressor is under
ON-OFF limiting.
Setting selection indication of each button
In the field on which setting selection was made (touched), letters are
displayed in reverse video.
Initial screen and reset screen after shut-off of touch panel
Menu screen
Respective screens of this graphic panel display have buttons that
allow the screen to shift to respective screens directly.
After powering up the control circuit, the initial screen shifts to this
screen.
Screen that appears immediately
after powering up the control circuit.
With the touch of any part of the
screen during touch panel shut-off,
the screen shifts to this screen.
With the touch of “LIGHT OUT SC”,
the screen returns to the screen
before the screen was shut off.
NOTE
During 30 seconds immediately after powering up the
control circuit, communication connection check
between PLC (Programmable Logic Controller) and
graphic panel display is made.
Therefore, any actions on the graphic panel display
during this period, including screen change or
changing of operating parameters, are not accepted.
NOTE
For reducing the replacement frequency of the graphic
panel display, the graphic panel display shuts off
automatically if no operation is made to the graphic
panel display since 30 minutes.
Touching any part of the screen while the graphic
panel display is shut off makes the screen shift to the
right hand side screen indication as indicated in
screen and reset screen after shut-off of touch panel"
on page 13
Lifetime of the backlight (time required for backlight to
reduce its intensity to one half) varies depending on
the ambient condition, and is about 30,000 hours.
CAUTION
Do not touch the graphic panel display with strong
force or hard objects.
It may result in injuries due to cracking of the display.
1
With this screen you can select remote operation/local operation
for running and stopping the unit.
In case of models with 2 temperature setting option, selection of
the operation mode during on the unit operation is also available.
2
The "MEASUREMENT" screen indicates the various operation
data of the unit.
Indications appear whether the unit is running or has stopped.
3
Through this settings screen you can make various settings
including the chilled water outlet target temperature.
4
Through this menu you can refer to the alarm history and
predictive maintenance history.
History of details as in the "MEASUREMENT" screen of the last 6
minutes is available (per minute).
5
The alarm screen indicates the details of errors in case of
abnormal stops.
Reset of abnormal stop conditions is performed with this screen.
6
This is a screen to make important settings in terms of unit
operation including protective function settings, factory-shipped
configuration, etc.
Only service persons are allowed to make setting changes
(password is required).
7
This screen indicates I/O condition of the PLC and readouts of
various analog data (for service persons only).
CAUTION
Do not attempt to change the settings within "SVC
SET" yourself.
Service settings include extremely important setting items.
Erroneous settings may lead to equipment damage.
1
2
3
4
5
7
6