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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.
Refer to DOAS Installation Manual for Test Operation for DOAS
system.
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
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etc.). See installation manual of the Branch Selector units and 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 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
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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.
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
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DANGER:ELECTRICAL SHOCK
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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.
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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.
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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.
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On top of this system test operation, Branch Selector units and 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 Branch Selec-
tor unit and indoor unit test run cannot be carried out.
Abnormalities on Branch Selector units and indoor units cannot be
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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.
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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 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.
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ing the push buttons and DIP switches on the printed circuit board
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operation.
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3P362438-5N English
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