Test Operation - Daikin RYYQ8T7Y1B Installation And Operation Manual

15.5. Test operation

After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run must be
performed according to the procedures described below.
15.5.1. Precautions before starting test operation
During test operation, the outdoor unit and the indoor units will start
up:
Make sure that the preparations of all indoor units are finished

(field piping, electrical wiring, air purge, ...). See installation
manual of the indoor units for details.
CAUTION
Do not insert fingers, rods or other objects into the air inlet
or outlet. When the fan is rotating at high speed, it will
cause injury.
CAUTION
Do not perform the test operation while working on the
indoor units.
When performing the test operation, not only the outdoor
unit, but the connected indoor unit will operate as well.
Working on an indoor unit while performing a test operation
is dangerous.
CAUTION
During tests never pressurize the appliances with a

pressure higher
pressure (as indicated on the nameplate of the unit).
If refrigerant gas leaks, ventilate the area immediately.

Toxic gas may be produced if refrigerant gas comes
into contact with fire.
Never directly

refrigerant. This could result in severe wounds caused
by frostbite.
Test run is possible for ambient temperatures between

–20°C and 35°C.
DANGER: Do not touch piping and internal parts.
See "2. General safety precautions" on page
DANGER: Electrical shock
See "2. General safety precautions" on page
 Provide a logbook and machine card.
In accordance with the applicable legislation, it may be
necessary to provide a logbook with the equipment containing at
least: info on maintenance, repair work, results of tests, stand-by
periods, ...
INFORMATION
Note that during the first running period of the unit,
required power input may be higher. This phenomenon
originates from the compressor that requires a 50 hour run
elapse before reaching smooth operation and stable power
consumption. Reason is that the scroll is made out of iron
and that it takes some time to smooth the surfaces that
make contact.
NOTICE
To protect the compressor, be sure to turn on the power
supply 6 hours before starting operation.
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
than the maximum allowable
touch any accidental leaking
2.
2.
15.5.2. Test operation
The procedure below describes the test operation of the complete
system. This operation checks and judges following items:
Check of wrong wiring (communication check with indoor units).

Check of the stop valves opening.

 Judgement of piping length.
Gathering reference data for leak detection functionality.

If the leak detection functionality is required, the test run needs
to be executed including a detailed refrigerant situation check. If
the leak detection functionality is NOT required, the test run can
skip the detailed refrigerant situation check. This can be defined
by setting [2-88].
- [2-88]=0, the test run will be executed including the detailed
refrigerant situation check. After the test run, the unit will be
prepared for leak detection functionality (for more details, see
"15.3. Leak detection function" on page
- [2-88]=1, the test run will be executed without the detailed
refrigerant situation check. After the test run, the unit will
NOT be prepared for leak detection functionality.
INFORMATION
When [2-88]=0, the test operation time can take up to

4 hours.
When [2-88]=0 and the test operation was aborted

before the end, the U3 warning code will be visible on
the user interface. It is possible to operate the system.
Leak detection function will NOT be available. It is
advised to re-execute the test operation.
If the autocharge function was used, the unit informs

the user in case unfavourable ambient conditions are
present to gather detailed refrigerant situation data.
When this is the case, the accuracy of leak detection
operation will drop. It is advised in such a case to
perform the test operation again on another more
favourable moment. In case no "E-2" or "E-3"
information was displayed during the autocharging
procedure, it is possible to have reliable data
gathering during the test operation. See ambient
limitations in the information table on
In case Hydrobox units or RA DX indoor units are present in the
system, above 2 checks will not be performed.
On top of this system test operation, indoor units operation should
also be checked separately.
Make sure to carry out the system test operation after the first

installation. Otherwise, the malfunction code U3 will be displayed
on the user interface and normal operation or individual indoor
unit test run cannot be carried out.
Abnormalities on indoor units cannot be checked for each unit

separately. After the test operation is finished, check the indoor
units one by one by performing a normal operation using the
user interface. Refer to the indoor unit installation manual for
more details (e.g., Hydrobox) concerning the individual test run.
INFORMATION
It may take 10 minutes to achieve a uniform

refrigerant state before the compressor starts.
During the test operation, the refrigerant running

sound or the magnetic sound of a solenoid valve may
become loud and the display indication may change.
These are not malfunctions.
Procedure
1 Close all front panels in order to not let it be the cause of
misjudgement (except the electrical component box inspection
opening service cover).
2 Make sure all field settings you want are set; see
"15.2. Monitoring function and field settings" on page
3 Turn ON the power to the outdoor unit and the connected indoor
units.
42).
page 36.
38.
Installation and operation manual
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