Powering Up The Unit; Failure Diagnosis At The Moment Of First Installation; Setting The Pump Speed - Daikin EWAQ-ACV3 Installation Manual

8 Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
9 Air purge valve
Make sure the air purge valve is open (at least 2 turns).
10 Pressure relief valve
Check if the unit is completely filled with water by operating the
pressure relief valve. It should purge water instead of air.
11 Shut-off valves
Make sure that the shut-off valves are fully open.
Operating the system with closed valves will damage the
pump!
12 Protection against freezing
Make sure that in colder climates (ambient temperature can
become lower than 0°C) the unit is protected against freezing by
means of a heater tape or by adding glycol to the water.
Also refer to "Protecting the water circuit against freezing" on
page 10.
13 Mainswitch handle
Mount the mainswitch handle and fasten screw in order to power
up the unit.
14 Protection cap(s)
Protection cap(s) must be mounted on the right side of the
mainswitch after connection of the field wiring.

Powering up the unit

1 Switch on the main switch on the unit.
2 When power supply to the unit is turned on, "88" is displayed on
the user interface during its initialisation, which might take up to
30 seconds. During this process the user interface cannot be
operated.
Failure diagnosis at the moment of first installation
In case nothing is displayed on the remote controller (the current
set temperature does not display), check for any of the following
abnormalities before you can diagnose possible malfunction
codes.
Disconnection or wiring error (between power supply and
unit, between unit and remote controller).
The fuse on the outdoor unit PCB may have run out.
If the remote controller shows "E3", "E4" or "L8" as an error code,
there is a possibility that either the stop valves are closed, or that
air inlet or air outlet are blocked.
If the error code "U2" is displayed on the remote controller, check
for voltage imbalance.
If the error code "L4" is displayed on the remote controller, it is
possible that air inlet or air outlet are blocked.
The reversed phase protection detector of this product only
works during the initialisation stage after a power reset.
The reversed phase protection detector is designed to stop the
product in case of an abnormality when the product is started
up.
When the reversed phase protection circuit forced the unit to
stop, check if all phases are existing. If this is the case, shut
off the power supply to the unit and replace two of three
phases. Turn on power again and start the unit.
Reversed phase detection is not performed while the product
is operating.
Installation manual
17
In case of possible reversal of phases after a momentary
black out of power and the power goes on and off while the
product is operating, install a reversed phase protection
circuit on site. Such situation is not unimaginable when using
generators. Running the product in reversed phase can
break the compressor and other parts.
For a missing phase in case of W1 units, "E7" or "U2" will be
displayed on the remote controller of the indoor unit.
Operation will be impossible with either one of these
phenomena. If this happens, turn off the power, re-check the
wiring and switch the position of two of the three electrical wires.
(If operation is not possible, do not under any circumstances
force the electromagnetic contactor on.)

Setting the pump speed

The pump speed can be selected on the pump (see
components" on page 7).
The default setting is high speed (I). If the water flow in the system is
too high (e.g., noise of running water in the installation) the speed
can be set to low speed (II).
NOTE The speed dial on the pump indicates 3 speed
settings. However, only 2 speed settings exist: low
speed and high speed. The indicated medium speed
setting on the speed dial is equal to low speed.
The available external static pressure (ESP, expressed in kPa) in
function of the water flow (l/min) is shown in the graph below.
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58
EWAQ+EWYQ009~011ACV3 + EWAQ+EWYQ009~013ACW1
Packaged air-cooled water chillers and packaged
"Main
I I
II II
[l/min]
reversible air to water heatpumps
4PW51587-1A