72
10.5.10. Connecting power supply cables
CAUTION
• For three phase model, never operate the unit by pressing the electromagnetic switch.
• Never correct the phase by switching over any of the wires inside the unit.
10.5.11. Precautions with regard to test operation
(Must first select “cooling” mode.)
* When operation mode changes, the compressor stops operation momentary.
• Use only insulation tool to the switch on the microswitch on the electric circuit board. (Do not use
your finger or a metallic object.)
• Do not switch on power before all installation is completed.
• For 3 phase power, make sure the phases are connected correctly. (If the phases are connected
incorrectly, LED indicator on the electric circuit board will start flashing.)
• After power on, make sure the voltage is 90% - 110% of the rated voltage.
• May use remote control or corresponding switches on the control panel of the outdoor unit to initiate
“Test run”. If “Test Run” is initiated using remote control, refer to indoor unit installation.
• Test run consists of cooling and heating modes (Single mode unit does not have heating
function).
• Press and hold SW1 more than 1 second. In DS1, under different setting condition, outdoor unit will
perform “cooling” test run or “heating” test run.
DS1 Operation mode
1234
ON OFF X X “Cooling” test run
ON ON X X “Heating” test run
OFF OFF X X PUMP DOWN
• Press SW1 again to cancel test run.
• If outdoor temperature is high during “heating” test run, or low during “cooling” test run, the protection system in the system will be activated
within several minutes.
NOTE 1
These units are equipped with connection error prevention circuits. If the units do not operate, it is possible that the connection
error prevention circuits have been operated. In such cases, check that the Indoor/outdoor unit connection wire (connected to
terminals , and ) is connected correctly. If they are connected incorrectly, connect them correctly. Normal operation
should then commence.
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