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2. Test operation
Normal
START
Test operation for
all units in turn
Test operation for one indoor unit
Operate all the indoor units at once.
Operation start
Is cold air or hot air discharged?
(NOTE 1)
(NOTE 2)
(NOTE 3)
Is the temperature difference
between suction and discharge good?
Is the operating voltage correct?
(Rated voltage ±10%)
Refer to “Test operation procedure” of
indoor remote controller.
(NOTE)
After power-ON, it may require Max. 10 minutes
to start the operation due to the initial
communication of the system.
Check operation status of the compressor.
Is air circulation good?
Is the operating current normal?
Is the operating pressure normal?
Check direction of the louver.
Execute a test operation using
“Function of start/stop the indoor unit from
outdoor unit” in “Service support function”.
• Check power voltage of the
main power supply.
• Check cable size of the
power supply.
• Check temperature load of the indoor room/
outdoor ambient.
• Check pipe length and refrigerant charge amount.
• Check operating Hz of compressor.
• Check abnormal sound in the outdoor unit.
(Abnormal sound, etc of compressor and others)
The operation does not start approx. 3 minutes
after power-ON or after operation stopped.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO