EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
10
Defining the timer threshold for maintenance warning
User parameter
cb
allows you to define a timer threshold (running
hours of the compressor) after which the controller will generate a
maintenance warning or request. The default, limit and step values
for the timer threshold are:
■
Default value
0
hours
■
Limit values
0
to
10
,
000
hours
■
Step value
100
hours
To define the timer threshold, proceed as follows:
1
Enter the list of user parameters.
Parameter code
:d
appears on the display.
2
Select parameter code
cb
using the
A
and/or
Z
key.
3
Press the
R
key to switch to the parameter value.
4
Select the appropriate setting using the
A
and/or
Z
key.
5
Press the
R
key to return to the list of parameter codes.
6
To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the
A
and/
or
Z
key and then repeat from instruction 3 onwards.
7
To save the modifications, press the
E
key. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40
seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Enabling or disabling the buzzer
When an alarm is detected, the buzzer is activated for the period
defined by user parameter
p4
. The default, limit and step values for
the activation period are:
■
Default value
1
min
■
Limit values
0
to
15
min
0
buzzer disabled
15
buzzer active until muted by the user
■
Step value
1
min
To enable the buzzer for a certain period or to disable the buzzer,
proceed as follows:
1
Enter the list of user parameters.
Parameter code
:d
appears on the display.
2
Select parameter code
p4
using the
A
and/or
Z
key.
3
Press the
R
key to switch to the parameter value.
4
Select the appropriate setting using the
A
and/or
Z
key.
5
Press the
R
key to return to the list of parameter codes.
6
To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the
A
and/
or
Z
key and then repeat from instruction 3 onwards.
7
To save the modifications, press the
E
key. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40
seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Selecting local or remote on/off control
User parameter
h7
in combination with the remote on/off switch
(installed by the customer) allows the user to switch the unit on
without using the
I
key on the controller.
■
When user parameter
h7
is set to
0
(=No), the unit can only be
switched on by means of the
I
key on the controller.
■
When user parameter
h7
is set to
1
(=Yes), the unit can be
switched on by means of the remote on/off switch and the
I
key on the controller.
To select local or remote on/off control, proceed as follows:
1
Enter the list of user parameters.
Parameter code
:d
appears on the display.
2
Select parameter code
h7
using the
A
and/or
Z
key.
3
Press the
R
key to switch to the parameter value.
4
Select the appropriate setting using the
A
and/or
Z
key.
5
Press the
R
key to return to the list of parameter codes.
6
To adjust or to consult other user parameters before saving the
modifications, select another user parameter using the
A
and/
or
Z
key and then repeat from instruction 3 onwards.
7
To save the modifications, press the
E
key. To cancel the
modifications wait approximately 40 seconds.
In the first case, the controller saves the changes, leaves the list
of user parameters and returns to normal operation, displaying
the inlet water temperature.
In the second case, the display starts flashing. Approximately
40
seconds later, the controller leaves the list of user
parameters without saving the modifications. The inlet water
temperature reappears on the display.
Locking the controller keyboard
Once user parameter
h9
is set to
0
, the following advanced features
can no longer be carried out by means of the controller:
■
modifying direct and user parameters (parameters can be
displayed but not modified),
■
resetting the timers.
When user parameter
h9
is set to
1
, the above-described advanced
features can be carried out using the controller.
To lock or unlock the controller keyboard, proceed as follows:
1
Enter the list of user parameters.
Parameter code
:d
appears on the display.
2
Select parameter code
h9
using the
A
and/or
Z
key.
3
Press the
R
key to switch to the parameter value.
4
Select the appropriate setting using the
A
and/or
Z
key.
5
Press the
R
key to return to the list of parameter codes.
NOTE
If the unit is always working in normal conditions, no
specific maintenance is requested. In this case the
warning function can be disabled by setting parameter
cb
to
0
.
Key on the controller
Remote On/off switch
UNIT RESULT
ON
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
