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10.5.10. Precautions with regard to test operation
• Use only insulation tool to the switch on the microswitch on the electric circuit board. (Do not use
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
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.
(Must first select "cooling" mode.)
When operation mode changes, the compressor stops operation momentary.
• 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 will be activated within several.
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 ter-
minals
,
then commence.
NOTE 2
Do not short the remote control unit wires to each other. (The protection circuit will be activated and the units will not operate.)
Once the cause of the short is eliminated, normal operation will then be possible.
NOTE 3
When running the units in heating mode during test operation, be sure to run the units in cooling mode first before selecting this
mode. If heating mode is selected first, it may cause problems with operation of the compressor.
NOTE 4
Be sure to select cooling mode first, and run the unit in this mode for 5 minutes or more. If the cooling operation is not executed
first for five minutes or more, the heating operation can not be executed.
(Test operation will be cancelled automatically after 30 minutes.)
NOTE 5
Test operation mode should always be cancelled once test operation itself has been completed.
NOTE 6
If the self-diagnosis function reports a problem but more than one problem has developed at the indoor and/or outdoor units, the
problem display on the remote control unit may not match the LED display on the outdoor unit printed circuit board. In such cases,
check both locations and remove the causes of the problems.
heating modes (Single mode unit does not have heating
DS1
1
2
ON
OFF
X
ON
ON
X
OFF
OFF
X
and
) is connected correctly. If they are connected incorrectly, connect them correctly. Normal operation should
Operation mode
3
4
X
"Cooling" test run
X
"Heating" test run
X
PUMP DOWN
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