Installation and operation manual
24
125A8V1BF
VRV IV System indoor unit
4P405267-1C – 2021.04
8.5.
Final check and test run
8.5.1. Final check
Before switching on the unit, read the following:
When the complete installation and all necessary settings have
been carried out, be sure that all panels of the unit are closed. If
this is not the case, inserting your hand through the remaining
openings can cause serious injury due to electrical and hot parts
inside the unit.
The service panel of the switch box may only be opened by a
licensed electrician for maintenance purposes.
In order to purge most of the air out of the system perform a pump
operation as described below:
1
Change field setting [E
-
04]
The default value is 0.
When changing the setting to 1, the pump will operate at low
speed (pump only, the unit will not operate).
When changing the field setting to 2, the pump will operate at
high speed.
2
When air purging is finished, change the field setting back to 0.
It is the responsibility of the installer to make sure that the air is
purged out of the unit and system.
Be sure that all stop valves are open. (Refer to vacuuming
procedure of the outdoor unit)
Be sure that all water valves are open.
8.5.2. System test run
Before you can check test operation of each indoor unit separately,
you have to do the system test run. System test run is explained in
the installation manual of the outdoor unit. This is an automatic test
run which can take some time.
When the system test run is finished, it is possible to do an individual
test run as described in
"8.5.3. Indoor unit individual test run" on
. During this test run, the installer should check indicated
items.
8.5.3. Indoor unit individual test run
The installer is obliged to verify correct operation of the indoor and
outdoor unit after installation. Therefor a test run must be performed
according to the procedures described below. At any time it is
possible to check correct operation of space heating/cooling.
Temperature read-out mode
On the user interface, the actual temperatures can be displayed.
1
Push and hold the
button for 5 seconds.
The leaving water temperature is displayed (icons
and
and are blinking).
2
Use the
and
buttons to display:
The entering water temperature (icons
and
are
blinking and the icon is flashing slowly).
The indoor temperature (icons and
are blinking).
The outdoor temperature (icons and are blinking).
3
Push the
button again to leave this mode. If no button is
pressed, the user interface leaves the display mode after 10
seconds.
Procedure for space heating/cooling
1
Check the leaving water and entering water temperature through
the user interface read-out mode and write down the displayed
"Temperature read-out mode" on page 24
2
Push the button 4 times so the
icon will be displayed.
3
Perform the test as follows (when no action is performed, the
user interface will return to normal mode after 10 seconds or by
pressing the button once):
To test the space heating/cooling operation push the
button
to start the test run operation.
4
The test run operation will end automatically after 30 minutes or
when reaching the set temperature. The test run operation can
be stopped manually by pressing the button once. If there are
misconnections or malfunctions, an malfunction code will be
displayed on the user interface. Otherwise, the user interface
will return to normal operation.
5
To resolve the malfunction codes, see
.
6
Check the leaving water and entering water temperature through
the user interface read-out mode and compare them with the
values noted with step 1. After 20 minutes of operation an
increase/decrease of the values should confirm the space
heating/cooling operation.
NOTICE
When using thermostatic radiator valves, make sure to
open all valves during air purging operation.
INFORMATION
When the indoor units and outdoor unit are powered on for
the first time, an initialisation takes place. This will take
maximum 12 minutes.
When using the user interface during the initialisation, an
malfunction code (
UH
) can be displayed.
INFORMATION
During the first start up of the unit (the first 50 hours of
compressor running), it might happen that the noise
level of the unit is higher than mentioned in the
technical specifications. This is not an abnormal
event.
Start up of the unit in space heating mode is only
possible when the outdoor ambient temperature is
lower than 20°C.
INFORMATION
The operation mode can not be selected on the hydrobox.
The hydrobox follows the operation mode of the master
VRV DX Indoor Unit. Refer to outdoor unit manual for
further information.
INFORMATION
To display the last resolved malfunction code, push the
button 1 time. Push the button again 4 times to return to
normal mode.
INFORMATION
It is not possible to perform a test run if a forced operation
from the outdoor unit is in progress. Should forced
operation be started during a test run, the test run will be
aborted.
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