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cooling test run setting
heating test run setting
engine operating mode
Figure 20
Rotation speed display mode
Figure 21
(2) Checking the function of the outdoor unit
Checks before starting the engine (* Carry out these checks for all outdoor units of the corresponding refrigerant system.)
Has the crankcase heater been energized for 5 hours before starting the test run?
Is the bottom part of the compressor warmed up?
* If the above conditions have not been ful
fi
lled there is a danger of damage to the compressor, and great inconvenience
being caused to the customer. Under no circumstances should you start operating until these conditions are ful
fi
lled.
Setting the test run mode (only possible when all the indoor units are turned off)
* If a test run is set from the outdoor main board of the smallest address unit, a test run starts for all outdoor units
connected to the same refrigerant tubing system.
* The test run can be canceled from the outdoor main board of the smallest address unit.
Even if trouble occurs between the indoor unit and remote controller (communication failure), a test run can be
carried out from the outdoor unit. Therefore, after carrying out the test run with the outdoor unit, be sure to test
run with the remote controller.
Turn all the remote controller switches to “OFF”.
Press the HOME (S004) key for longer than 1 second to display the menu item number.“
”
Next, press the UP (S007) and DOWN (S006) keys to select the menu item number “
”
After displaying “
”, display the test run/forced setting display “
”.
While the status is test run/forced setting display, press the SET (S007) key to display the indication shown in
the
fi
gure below. In this condition, use the UP (S005) or DOWN (S006) key to select the forced cooling test run
setting mode or the forced heating test run setting mode.
While the forced test run setting mode is selected (
fi
gure below), press the SET (S005) key for longer than 1 second
to perform the cooling (heating) test run. The TEST/WARNING indicator (red LED (D052)) is lit during this time.
Checking the engine function (* Carry out these checks for all outdoor units of the corresponding refrigerant system.)
Checking the starting performance
• After completely removing air from the gas tubing, start the engine with the
fi
rst crank.
• During starting, overshoot or undershoot does not cause the protection device to work. After starting when the
vane of the compressor is out or when the clutch is on there is a temporary reduction in the rotation speed. This
is not a problem however.
Rotation speed display mode setting
a) During normal operation, at 10 second intervals the “system address, number of indoor units” and “engine
operating hours” are displayed alternately.
b) In this condition, press the SET (S007) key to display the system data. (Figure 20).
c) While data is displayed, each press of the UP (S005) key changes the display of the data code and data in
order. Set the data code to “
.” (Figure 21)
* If the HOME (S004) key is pressed or no operation is performed for 10 minutes, the normal display is restored.
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