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En-40
TEST RUN
9.
Pre-test run check items
9. 1.
Before the test operation, check the following items.
Is there a gas leakage? (At pipe connections {
fl
ange connections and brazed areas})
①
Is the system charged with the speci
fi
ed volume of refrigerant?
②
Is the refrigerant circuit address correct?
③
Is a breaker installed at the power supply cable of every outdoor unit?
④
Are the wires connected to the terminals without looseness, and in accordance with the speci
fi
cations?
⑤
Are the initial settings of the switches of the outdoor unit correctly con
fi
gured?
⑥
Is the 3-way valve of the outdoor unit open? (Gas pipe and liquid pipe)
⑦
Is power supplied to the crank case heater for more than 12 hours? Electricity current in short period of time
⑧
may result in compressor damage.
Are all the indoor units within the same coolant system connected to the power? Operating indoor units
⑨
which are not connected to the power may result in malfunctions.
After checking that the above items are all in order, refer to “9.2 Test operation method” to test
operation
the
unit.
If there are problems, adjust immediately and recheck.
Test operation method
9. 2.
Be sure to con
fi
gure test run settings only when the outdoor unit has stopped operating.
Perform test operation for each refrigerant system.
You can set "cooling test operation" or "heating test operation" with the push-button switch on the outdoor unit print
circuit board.
Test operation setting method
Use the MODE/EXIT, SELECT, and ENTER buttons on the indoor unit print circuit board to con
fi
gure settings ac-
cording to the procedures below.
Depending on the communication status between the indoor and outdoor units, it may take several minutes for
•
the system to start operating after settings for the test run are complete.
After the test run settings are complete, all the outdoor units and the connected indoor units will start operating.
•
Room temperature control will not activate during test operation (continuous operation).
If a knocking sound can be heard in the liquid compression of the compressor, stop the unit immediately and
•
then energize the crank case heater for a suf
fi
cient length of time before restarting the operation.
9378945029-03_IM_EN.indb 40
9378945029-03_IM_EN.indb 40
2011-9-20 16:26:04
2011-9-20 16:26:04