Before Operation; Checks Before Initial Start-Up; Test Run - Daikin VRV II RXYQ5MY1B Installation Manual

Caution
Be sure to keep the power line and transmission line apart from
each other.
Be careful about polarity of the transmission line.
Make sure that the transmission line is clamped as shown in the
figure in chapter "Field line connection".
Check that wiring lines do not make contact with refrigerant piping.
Firmly close the lid and arrange the electrical wires so as to pre-
vent the lid or other parts from coming loose.
When you don't use a wire conduit, be sure to protect the wires
with vinyl tubes etc, to prevent the edge of the knock-out hole
from cutting the wires.
8.

BEFORE OPERATION

8-1 Checks before initial start-up

Caution
Make sure that the circuit breaker on the power supply panel of
the installation is switched off.
Attach the power wire securely.
Introducing power with a missing N-phase or with a mistaken N-
phase will break the equipment.
After the installation, check the following before switching on the cir-
cuit breaker:
1.
The position of the switches that require an initial setting
Make sure that switches are set according to your application
needs before turning the power supply on.
2.
Power supply wiring and transmission wiring
Use a designated power supply and transmission wiring and
make sure that it has been carried out according to the instruc-
tions described in this manual, according to the wiring diagrams
and according to local and national regulations.
3.
Pipe sizes and pipe insulation
Make sure that correct pipe sizes are installed and that the insu-
lation work is properly executed.
4.
Additional refrigerant charge
The amount of refrigerant to be added to the unit should be written
on the included "Added Refrigerant" plate and attached to the rear
side of the front cover.
5.
Insulation test of the main power circuit
Using a megatester for 500V, check that the insulation resistance
of 2MΩ or more is attained by applying a voltage of 500V DC
between power terminals and earth. Never use the megatester for
the transmission wiring.
6.
Installation date
Be sure to keep record of the installation date on the sticker on the
electric box lid according to EN60335-2-40.

8-2 Test run

Caution
After completing installation, be sure to open the valve. (Operat-
ing the unit with the valve shut will break the compressor.)
Power supply connection
When running the unit for the first time after installation, be sure to
perform a test run following these steps for test run. (Not performing
a test run when the unit is first installed may prevent the unit from
operating properly.)
• During the operation, monitor the outdoor unit operation status
and check for any incorrect wiring.
15
1. Turn ON the power to the outdoor Make sure to turn ON the power 6 hours before
units and indoor units. starting the operation. This is necessary to warm
the crankcase preliminarily by the electric heater.
2. Check the LED on the P-board (A1P) in the outdoor unit to see if the data transmission
is performed normally.
Ready/
Microcomputer
Page
LED display
Error
operation
(Default status
monitor
before delivery)
HAP H1P
One outdoor unit installed
Master station
When multiple
Sub station 1
outdoor unit
installed (∗)
Sub station 2
(∗) The base (parent) unit is the outdoor unit to which the interconnecting wiring for the
indoor units is connected. The other outdoor units are child units.
.
3. As necessary, configure the system Always perform configuration after turning ON the
settings onsite by using the dipswitch power. To learn the setting method, refer to the
(DS1) on the outdoor unit P-board [Service Precautions] label attached at the
(A1P) and push button switches position shown in the figure on the right
(BS1 to 5). (Electric box lid in outdoor unit).
.
(Remember, the actual settings you have made
When the system is in the multiple-
must be recorded on the [Service Precautions]
outdoor unit configuration (Out Multi),
label.)
perform the configuration on the parent
unit. (Any settings made on a child unit
will be ignored.)
4. Check if the shutoff valves are in
Caution
appropriate status and correct any
wrong status. (Refer to the table in
"6-6 Additional Refrigerant Charge".)
5. Perform the check operation
The system operates for about 15 minutes
following the instructions printed
(30 minutes at maximum) and automatically
on the [Service Precaution] label.
stops the test operation. The system can start a
normal operation about 15 minutes after the test
operation, only if the remote controller displays
no error codes.
(Refer to figure 22)
1. Electric box lid
2. Service lid
3. [Service precautions] Label location
〈 〈 〈 〈 Cautions for check operation〉 〉 〉 〉
• If the system is started within about 12 minutes after the outdoor/
indoor units are turned ON, the compressor will not run and H2P
lights up. Before starting an operation, always verify that the LED
display shows the contents of the table in "8-2 Test run 2.".
• The system may require up to 10 minutes until it can start the
compressor after an operation start. This is a normal operation to
equalize the refrigerant distribution.
• The check operation does not provide any means of checking the
indoor units individually. For that purpose, perform normal opera-
tion using the remote controller after the check operation.
Remote controller displays an error:
Malfunction
Installation error
code
E3
The shutoff valve of
E4
an indoor unit is left
F3
closed.
UF
The phases of the
power to the outdoor U1
units are reversed.
No power is sup-
plied to an outdoor or
U1
indoor unit (includ-
U4
ing phase interrup-
tion).
Incorrect intercon-
nections between UF
units
E3
Refrigerant
F6
overcharge
UF
Cooler/heater changeover
Low
Bulk Bulk
Demand Multi
Individual noise
(parent) (child)
H2P H3P H4P H5P H6P H7P H8P
LED display: OFF ON Blinking
Do not leave any shutoff valve closed.
Otherwise the compressor will fail.
Remedial action
Check referring to the table in
"6-6 Additional Refrigerant
Charge".
Exchange two of the three
phases (L1, L2, L3) to make a
positive phase connection.
Check if the power wiring for the
outdoor units are connected
correctly.
(If the power wire is not con-
nected to L2 phase, no malfunc-
tion display will appear and the
compressor will not work.)
Check if the refrigerant line pip-
ing and the unit wiring are con-
sistent with each other.
Recalculate the required amount
of refrigerant from the piping
length and correct the refrigerant
charge level by recovering any
excessive refrigerant with a
refrigerant recovery machine.
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