– 144 –
(2) Test operation
Note 1
Note 2
Note 3
START
Normal
Notes 1-3 are on the next page.
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Test operation for one indoor unit
Operation starts
Is cold air or hot air discharged?
Is air circulation sufficient?
Operate all the indoor units at once.
Is there adequate temperature difference
between suction and discharge?
Is the operating voltage correct?
(220-240 V ±10%)
Is the operating current normal?
Is the operating pressure normal?
Refer to "Test operation procedure"
of the indoor remote controller.
Check the operating status of the
compressor.
Execute a test operation using
"Start/Stop Function of the Indoor
Unit from Outdoor Unit" in the
"Service Support Function" section.
• Check power voltage of
the main power supply.
• Check the cable size of
the power supply.
• Check the temperature load of the
indoor/outdoor units.
• Check the pipe length and refrigerant
amount.
• Check the operating Hz of the
compressor.
• Check the operation of the outdoor
fans.
• Check for abnormal sound in the
outdoor unit.
(Abnormal sound, etc. of the
compressor and other components)
Check the direction of the louver.
The operation does not start for
approximately 3 minutes after
powering-on or stopping operation.
Note: After powering-on, it may
require up to 10 minutes to start
the operation due to the initial
communications of the system.
Test operation for every indoor unit in turn
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