Daikin VRV IV RXYQ TTJU Series, Engineering Data

Page: 47 / 91

Installation Manual EDUS341411-N
48 Installation of Outdoor Units
3P362438-1B
38 3P362438-1B English
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,
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consumption and comfort, depending on the application type.
15.4. Test operation
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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 unit and the indoor units will start
up:
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piping, electrical wiring, air purge, etc.). See installation manual of
the indoor units for details.
CAUTION
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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 danger-
ous.
CAUTION
r During tests never pressurize the appliances with a pressure higher
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-
plate of the unit).
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Never directly touch any accidental leaking refrigerant. This could
result in severe wounds caused by frostbite.
r
Test run is possible for ambient temperatures between -4°F and
95°F (-20°C and 35°C).
DANGER: DO NOT TOUCH PIPING AND ITERNAL PARTS
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DANGER:ELECTRICAL SHOCK
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r 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.
INFORMATION
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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:
r Check of wrong wiring (communication check with indoor units).
r
Check of the stop valves opening.
r Judgment of piping length.
Mini-split 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.
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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.
r Abnormalities on indoor units cannot be checked for each unit
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units one by one by performing a normal operation using the user
interface. Refer to the indoor unit installation manual for more de-
tails concerning the individual test run.
INFORMATION
r It may take 10 minutes to achieve a uniform refrigerant state before
the compressor starts.
r 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.
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3 Turn ON the power to the outdoor unit 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
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-
ing the push buttons and DIP switches on the logic board on
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operation.