Daikin Hydrocube EWLP012KAW1N, Руководство по эксплуатации, Страница: 7 / 16

EWLP012~065KAW1N
Condenserless water-cooled water chillers
4PW30043-1
Operation manual
6
Keys provided on the controller:
Each key, except for the lower left key, combines two functions: E /
O , A / Y and I / Z . The function carried out when the user
presses one of these keys depends on the status of the controller
and the unit at that specific moment.
LEDs provided on the controller:
Direct and user parameters
The digital controller provides direct and user parameters. The direct
parameters are important for the everyday usage of the unit, e.g. to
adjust the temperature setpoint or to consult actual operational
information. The user parameters on the contrary provide advanced
features such as adjusting time delays or disabling the buzzer.
Each parameter is defined by a code and a value. For example, the
parameter used to select local or remote on/off control has code
h7
and value
1
or
0
.
Working with the EWLP units
This chapter deals with the everyday usage of the EWLP units. Here,
you will learn how to perform routine tasks, such as:
■
switching the unit on and off,
■
adjusting the temperature setpoint,
■
consulting actual operational information,
■
resetting alarms,
■
resetting warnings.
Switching the EWLP unit on
To switch the EWLP unit on, proceed as follows:
1 When the on/off digital input user parameter
h7
is set to
0
(=No),
press the I key for approximately 5 seconds to switch the unit
on in cooling mode (inlet water temperature control of
evaporator).
When the on/off digital input user parameter
h7
is set to
1
(=Yes), you can also switch the unit on using the remote on/off
switch (installed by the customer).
In both cases an initialization cycle is started and the T LED
starts blinking. The I LED, lights up when the unit is switched
on. Once all the timers have reached zero, the unit starts up and
the
T LED lights up permanently. The numeric display shows
the actual inlet water temperature of the evaporator.
2 When the unit is started up for the first time, or when the unit has
been out of operation for a longer period, it is recommended to
go through the following checklist.
Abnormal noise and vibrations
Make sure the unit does not produce any abnormal noises or
vibrations: check the fixations and piping. If the compressor
makes any abnormal noises, this may also be caused by an
overcharge of refrigerant.
Working pressure
It is important to check the high and low pressure of the
refrigerant circuit to ensure the proper operation of the unit and
to guarantee that the rated output will be obtained.
For reference, the average saturated temperature of R407C in
relation to the pressure readout can be found in
"Annex I" on
page 13 .
3 If the unit does not start after a few minutes, consult the actual
operational information available in the list of direct parameters.
Also refer to the chapter
"Troubleshooting" on page 11 .
Switching the EWLP unit off
To switch the EWLP unit off, proceed as follows:
1 When the on/off digital input user parameter
h7
is set to
0
(=No)
and the unit is on, press the I key for approximately 5 seconds
to switch the unit off.
The I LED and the T LED are extinguished.
2 When the on/off digital input user parameter
h7
is set to
1
(=Yes), switch the unit off using the remote on/off switch.
The I LED and the T LED are extinguished.
E
key, to enter the scroll list of user parameters, to confirm a
parameter modification and to return to normal operation.
O
key, to de-activate the buzzer in the case of an alarm.
A
key, to scroll through the list of direct or user parameters or to
raise a setting.
Y
key, has no effect on EWLP units.
R
key, to enter the scroll list of direct parameters or to switch
between a parameter's code and its value.
I
key, to start the unit in cooling mode or to switch the unit off when
cooling mode is active.
Z
key, to scroll through the list of direct or user parameters or to
lower a setting.
T
LEDs, indicates the status of the compressor 1 (left LED) and
compressor 2 (right LED). The
T LEDs do not light up when the
compressor is not active, blinks when the compressor cannot start
up although extra load is requested (e.g. timer active) and lights
up permanently when the compressor is active.
Y
LED, is not used.
I
LED, indicates that cooling mode is active.
U
LED, indicates that the value on the numeric display should be
multiplied by 100.
NOTE Temperature readout tolerance: ±1°C.
Legibility of the numeric display may decrease in direct
sunlight.
The pressures measured will vary between a maximum
and minimum value, depending on the water and outdoor
temperatures (at the moment of measurement).
NOTE
In case of remote on/off control (
h7
=
1
), it is recom-
mended to install an on/off switch near the unit in
series with the remote switch. The unit can then be
switched off from either place.