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Daikin EUWA20HDW15 [7/18] Digital controller
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6
Connection to the unit
The digital controller is connected to the unit, more specifically to
the controller PCB inside the unit, by means of a 6-ray cable and a
connector located on the rear side of the controller.
A cable length of up to 1000 metres between the digital controller
and the unit is allowed. This gives the opportunity to control the unit
from a considerable distance. Refer to "Cable for digital controller"
in the installation manual for cable specifications.
Figure 4 – Rear side of the controller and its connector (1)
Working with the unit
This chapter deals with the everyday usage of the unit. Here, you
will find how to perform routine tasks, such as:
■ switching the unit on and off,
■ consulting actual operational information,
■ adjusting the temperature setpoint,
■ resetting the unit.
Switching the unit on
1 Press the
f
key on the controller.
Depending on the setting of the remote ON/OFF control parameter
("user settings" menu), the following conditions may occur.
When the remote ON/OFF control parameter is set to NO, the LED
inside the
f
key lights up and an initialization cycle is started.
Once all the timers have reached zero, the unit starts up.
When the remote ON/OFF control parameter is set to YES, the
following table applies:
Local key Remote switch Unit
ff
ff
f
LED
ON ON ON ON
ON OFF OFF Flashing
OFF ON OFF OFF
OFF OFF OFF OFF
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 that the unit does not produce abnormal noises or
vibrations: check the fixations and piping. If the compressor makes
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.
OPERATION
The EUWA units are equipped with a digital controller offering a
user-friendly way to set up, use and maintain the unit.
This part of the manual has a task-oriented, modular structure. Apart
from the first section, which gives a brief description of the controller
itself, each section or subsection deals with a specific task you can
perform with the unit.
Digital controller
User interface
The digital controller consists of an alphanumeric display, labelled
keys which you can press, a number of LEDs indicating the
selected menu and a hinged cover. When the cover is closed,
only the most frequently used keys are accessible.
Figure 3 – Digital controller
Keys accessible when the cover is closed:
■
f
key, to start up or to shut down the unit.
■
g
key, to enter the safeties menu or to reset an alarm.
■
h
key, to scroll through the screens of a menu (only in case
a, z or e appears) or to raise, respectively lower a setting.
■
j
key, to confirm a selection or a setting.
Keys only accessible when the cover is open:
■
a
key, to enter the readout menu.
■
z
key, to enter the setpoints menu.
■
e
key, to enter the user settings menu.
■
r
key, to enter the timers menu.
■
t
key, to enter the history menu.
■
y
key, to enter the info menu.
■
u
key, to enter the input/output status menu.
■
q
key, to enter the user password menu.
■
d
key, has no effect on EUWA units.
This key, allowing the selection of cooling or heating operation
on EUWY units is provided on the EUWA controller but the
EPROM on the controller PCB denies any action since heating
operation is impossible.
Note - Temperature readout tolerance: ±1°C.
- Legibility of the alphanumeric display may decrease in
direct sunlight.
1
Содержание
- Operation manual 1
- Packaged air cooled water chillers 1
- Electrical specifications 1 2
- Ntroduction 2
- Ontents 2
- Operation manual 2
- Technical specifications 1 2
- Escription 3
- Euwa20 3
- Euwa25 3
- Function of the main components 4
- Safety devices 4
- Internal wiring parts table 5
- Measuring devices 5
- Checks before initial start up 6
- Efore operation 6
- General recommendations 6
- Power supply connection and crankcase heating 6
- Water supply 6
- Digital controller 7
- Peration 7
- Working with the unit 7
- Adjusting the temperature setpoint 8
- Consulting actual operational information 8
- Enter the readout menu using the a key 8
- Enter the setpoints menu using the z key 8
- If the manual control mode is selected refer to the user settings menu none of the above mentioned setpoints will be active 8
- If the remote on off control parameter is set to no 8
- If the remote on off control parameter is set to yes 8
- If the unit does not start after a few minutes consult the readout menu which gives the status of the different circuits refer to paragraph consulting actual operational information also refer to the chapter trouble shooting 8
- Press j to save the adjusted temperature setpoint or press the z key to cancel the modification 8
- Press the f key on the controller 8
- Press the f key on the controller or switch the unit off using the remote on off switch 8
- Press the h key to adjust the temperature setting 8
- Press the w key to return successively to the second and the first screen of the readout menu 8
- Press the x key to enter the second screen of the readout menu 8
- Press the x key to enter the third screen of the readout menu 8
- Select the setpoint to be adjusted using the j key 8
- Setp cool 1 inlet water temperature cooling setpoint 1 8
- Setp cool 2 inlet water temperature cooling setpoint 2 8
- Switching the unit off 8
- The pressures measured will vary between a maximum and minimum value depending on the water and outdoor temperatures at the moment of measurement 8
- The selection between setpoint 1 and 2 is done by a remote dual setpoint switch to be installed by the customer the actual active setpoint can be consulted in the readout menu 8
- The unit provides definition and selection of two independent temperature setpoints for cooling operation 8
- To adjust a setpoint proceed as follows 8
- To adjust other setpoints repeat from instruction 2 onwards 8
- Advanced features of the digital controller 9
- History menu t t t t t 10
- Info menu y y y y y 10
- Input output menu u u u u u 10
- Safeties menu g g g g g 10
- The history menu contains all the information concerning the latest shutdowns 10
- The input output menu gives the status of all the digital inputs and the relay outputs of the unit 10
- The safeties menu provides useful information for trouble shooting purposes 10
- Timers menu r r r r r 10
- To calibrate the sensor for inlet water temperature measurement 10
- To change the user password 10
- To check the actual value of the compressor timers 10
- To check the actual value of the general software timers 10
- To check the status of circuit 1 at activation of one of the circuits safeties 10
- To check the status of circuit 2 at activation of one of the circuits safeties 10
- To check the status of circuit 3 at activation of one of the circuits safeties 10
- To check the status of the alarm the operation and the pump voltage free contacts 10
- To check the status of the circuit safeties 10
- To check the status of the evaporator heater however the evaporator heater option is not offered by daikin 10
- To check the status of the fanspeed relays 10
- To check the status of the flowswitch 10
- To check the status of the low pressure bypass switches 10
- To check the status of the remote setpoint selection switch the remote on off switch and the reverse phase protector 10
- To check whether or not the different compressors are activated 10
- To consult additional information about the unit such as the unit name the refrigerant used and the manufacturing number 10
- To consult information about the controller s software version 10
- To consult information about the number of circuit 1 shutdowns and the circuit status at the most recent shutdown 10
- To consult information about the number of circuit 2 shutdowns and the circuit status at the most recent shutdown 10
- To consult information about the number of circuit 3 shutdowns and the circuit status at the most recent shutdown 10
- To consult information about the number of shutdowns the unit safety which caused the most recent shutdown and the unit status at this shutdown 10
- To consult information about the unit safety which caused the shutdown and to check the unit status at shutdown 10
- To consult the outlet water inlet water and ambient temperature limits 10
- To define whether or not a password is needed to change the temperature setpoint 10
- User password menu q q q q q 10
- When automatic control mode is selected the unit uses default a 2 step thermostat to control the cooling load however the thermostat parameters are not fixed and can be modified via the thermostat settings screen of the user settings menu 11
- Rouble shooting 14
- Aintenance 17
- Disposal requirements 17
- Maintenance activities 17
- Thermostat parameters 17
- Pwen09719 1b 18
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