Precautions Before Starting Test Operation; Test Operation - Daikin REYQ72TAYCU Manuel D'installation

No matter which control is selected, variations on the behavior of the
system are still possible due to protection controls to keep the unit
operating under reliable conditions. The intentional target, however,
is fixed and will be used to obtain the best balance between energy
consumption and comfort, depending on the application type.

15 .4 . 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 .4 . 1 .

Precautions before starting test operation

During test operation, the outdoor units, the Branch Selector units and
the indoor units will start up:
• Make sure that the preparations of all Branch Selector units and all
indoor units are finished (field piping, electrical wiring, air purge,
etc.). See installation manual of the Branch Selector units and 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 Branch Selec-
tor units and the indoor units.
When performing the test operation, not only the outdoor units, but the
connected indoor units will operate as well.
Working on indoor units or Branch Selector units while performing a
test operation is dangerous.
CAUTION
• During tests never pressurize the appliances with a pressure higher
than the maximum allowable pressure (as indicated on the name-
plate 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 touch any accidental leaking refrigerant. This could
result in severe wounds caused by frostbite.
• Test run is possible for ambient temperatures between -4°F and
95°F (-20°C and 35°C).
DANGER: DO NOT TOUCH PIPING AND INTERNAl PARTS
See Safety considerations on page i.
DANGER:ElECTRICAl SHOCk
See Safety considerations on page i.
• 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: informa-
tion on maintenance, repair work, results of tests, stand-by periods,
etc.
37
INFORMATION
Note that during the first running period of the unit, required power in-
put 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.
NOTE
To protect the compressor, be sure to turn on the power supply 6
hours before starting operation.
15 .4 .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.
• Judgment of piping length.
On top of this system test operation, Branch Selector units and 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 Branch Selec-
tor unit and indoor unit test run cannot be carried out.
• Abnormalities on Branch Selector units and indoor units cannot be
checked for each unit separately. After the test operation is finished,
check the Branch Selector units and the indoor units one by one by
performing a normal operation using the user interface. Refer to the
Branch Selector units and the indoor units installation manual for
more details 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 mag-
netic 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 misjudg-
ment.
2 Make sure all field settings you want are set; see 15.2. Monitoring
function and field settings on page 31.
3 Turn ON the power to the outdoor units, the connected Branch
Selector units and the connected indoor units.
NOTE
Be sure to turn on the power 6 hours before operation in order to have
power running to the crankcase heater and to protect the compressor.
4 Make sure the default (idle) situation is existing; see 13.2. Operat-
ing the push buttons and DIP switches on the printed circuit board
on page 24. Push BS2 for 5 seconds or more. The unit will start
test operation.
3P362438-9J English