Operation manual
9
EWAQ080~260DAYN
Packaged air-cooled water chillers
4PW35556-1E
Switching the unit off
If no remote on/off switch is configured:
Press the
œ
key on the controller.
The LED inside the
œ
key goes out.
If a remote on/off switch is configured:
Press the
œ
key on the controller or switch the unit off using the
remote on/off switch.
The LED inside the
œ
key goes out in the first case and starts
blinking in the second case.
Switching units ON/OFF in a DICN system
If the
œ
key is pressed on a unit with status
NORMAL
or
STANDBY
, all
other units with status
NORMAL
or
STANDBY
will be ON or OFF.
If the
œ
key is pressed on a unit with status
DISCONNECT ON/OFF
,
only this unit will be ON or OFF.
Consulting actual operational information
1
Enter the readout menu. Refer to the chapter
"How to enter a
menu" on page 8
.
The controller automatically shows the first screen of the
readout menu which provides the following information:
•
¶
cooling mode
•
§
heating mode
•
≠
fan (
H
high or
L
low)
•
¡
low noise mode activated (only available when option
OPIF is installed)
•
…
pump on
•
…1
/
2
in case of dual pump control: pump 1/2 on
•
∞11
/
12
circuit 1 compressor 1/2 on
•
∞21
/
22
circuit 2 compressor 1/2 on
•
≤
alarm and last occured malfunction code (
0U4
in
example)
•
13$6¢
actual temperature (inlet or outlet temperature
depending on active mode)
•
12$0¢
temperature setpoint (inlet or outlet temperature
depending on active mode)
2
Press the
Ì
key to enter the next screen of the readout menu.
•
MANUAL MODE
or
COOL INLSP1
/
2
or
COOL OUTLSP1
/
2
:
manual/automatic control mode operation. If the automatic
control mode is selected, the controller will indicate the active
temperature setpoint. Depending on the status of the remote
contact, setpoint one or setpoint two is active.
•
INL WATER
: actual inlet water temperature.
•
OUTL WATER
: actual outlet water temperature.
•
AMBIENT
: actual ambient temperature.
3
Press the
Ì
key to enter the next screen of the readout menu.
The
TEMPERATURE
screen of the readout menu provides
information concerning the discharge temperature of the
compressors (
C11
and
C12
/
C21
and
C22
).
4
Press the
Ì
key to enter the next screen of the readout menu.
The
C1
/
C2 TEMP. READOUT
screen of the readout menu
provides information concerning the refrigerant temperature
(
REFR
) of circuit 1/circuit 2.
5
Press the
Ì
key to enter the next screen of the readout menu.
The
ACT. PRESSURES
screen of the readout menu provides
information concerning the actual pressures of circuit.
■
HP1/2
: high pressure of the refrigerant in circuit 1/2. The first
number stands for the pressure in bar, the second number
stands for the bubble point saturation temperature in degrees
Celsius.
■
LP1/2
: low pressure of the refrigerant in circuit 1/2. The first
number stands for the pressure in bar, the second number
stands for the dew point saturation temperature in degrees
Celsius.
■
LOWNOISE
: at the bottom of the first screen, the status of the
lownoise setting is shown (
Y
=active or
N
=not active).
6
Press the
Ì
key to enter the next screen of the readout menu.
The
UNIT STATUS
screen of the readout menu provides
information concerning the status of the different circuits.
•
C11
and
C12
: actual status of circuit 1 (
ON
or
OFF
).
•
C21
and
C22
: actual status of circuit 2 (
ON
or
OFF
).
When the unit is on and a circuit is
OFF
, the following status
information may appear.
•
SAFETY ACT.
: one of the circuit safety devices is activated
(refer to
"Troubleshooting" on page 19
).
•
FREEZEUP DIS
: the compressor is disabled by the freeze-up
disable function.
•
FREEZEUP PR
: freeze-up prevention is active.
•
HP SETBACK
: high pressure setback is active.
•
MIN.RUN.TIM
: minimum running time of the compressor is
active.
•
LIMIT
: the compressor is limited by the limitation function.
•
STANDBY DICN
: when in a DICN configuration, the unit is in
stand by mode because there is sufficient current capacity to
maintain set point.
•
UNIT OFF
: the unit is switched off.
•
AREC INLET
: the compressor will not start up when the inlet
water temperature has not risen enough compared to previous
switch off of the compressor.
•
FREE COOLING
: free cooling mode is active
•
TIMER BUSY
: the actual value of one of the compressor timers
is not zero (refer to
"Timers menu
Ó
" on page 12
).
•
PUMPLEAD TIM
: the compressor will wait to start up for as long
as the pump lead timer is counting down.
•
NO FLOW
: there is no flow after pumplead, the unit is in stand-by
mode.
•
NO PRIORITY
: This compressor will not start up because it has
no priority. Refer to
"Defining the lead-lag settings" on page 15
for
adjusting the priority.
NOTE
Also consult "Customization in the service menu"
chapter "Setting of the changeable inputs and outputs"
in the installation manual.
NOTE
When a remote ON/OFF switch is configured, the
remote ON/OFF contact for all units with status
NORMAL
or
STANDBY
of a DICN network is the contact
connected to the master unit.
For units with status
DISCONNECT ON/OFF
, the
remote contact is the contact connected to this unit.
NOTE
If the user wants 1 unit to operate on his command
only, this unit is to be set to
DISCONNECT ON/OFF
.
It is recommended not to select the master unit for this
purpose. Even if the status of the master is set to
DISCONNECT ON/OFF
, it will still be the contact
connected to the master which will switch ON/OFF the
other units in
NORMAL
or
STANDBY
mode. It would
therefore never be possible to only switch the master
unit OFF remotely.
Switching OFF the master unit only, should in this case
be done by the local ON/OFF key on the master unit.
_v¶¡
… ≤0U4
013$6¢
∞11 ∞12 ≠H 012$0¢
∞21 ∞22 ≠H
NOTE
For a DICN system, the
INLET WATER
and
OUTLET
WATER
values are the values of the individual units,
not of the system. Temperatures of the system can be
consulted in the first screen of the network menu.