Test Run; Pre-Test Run Check Items; Test Operation Method - Fujitsu AJ*A72LALH Series Installation Manual

9.

TEST RUN

9. 1.

Pre-test run check items

Before the test operation, check the following items.
Is there a gas leakage? (At pipe connections {fl ange connections and brazed areas})
Is the system charged with the specifi ed volume of refrigerant?
Is the refrigerant circuit address correct?
Is a breaker installed at the power supply cable of every outdoor unit?
Are the wires connected to the terminals without looseness, and in accordance with the specifi cations?
Are the initial settings of the switches of the outdoor unit correctly confi gured?
Is the 3-way valve of the outdoor unit open? (Gas pipe and liquid pipe)
Is power supplied to the crank case heater for more than 12 hours? Electricity current in short period of time
may result in compressor damage.
Are all the indoor units within the same coolant system connected to the power? Operating indoor units
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.
9. 2.

Test operation method

Be sure to confi gure test run settings only when the outdoor unit has stopped operating.
• 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 suffi cient length of time before restarting the operation.
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 confi gure settings ac-
cording to the procedures below.
En-40