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Items to be checked In case of defective Check column
Are the indoor and outdoor
units rigidly fixed?
Drop · vibration ·
noise
Are the installation works of the
outdoor and indoor units
completed?
Does not operate ·
burnout
Have you carried out a leakage
test with the test pressure
specified in the outdoor unit
installation manual?
Does not cool / Does
not heat
Is the insulation of refrigerant
piping and drain piping
completely carried out?
Water leakage
Does the drain flow out
smoothly?
Water leakage
Is the power supply voltage
identical to that stated in the
manufacturer’s label on the air
conditioner?
Does not operate ·
burnout
Are you sure that there is no
wrong wiring or piping or no
loose wiring?
Does not operate ·
burnout
Is earthing completed?
Danger in case of
leakage
Are the sizes of electric
wiring according to the
specification?
Does not operate ·
burnout
Are any of air outlets or inlets of
the indoor and outdoor units
blocked with obstacles?
(It may
lead to capacity drop due to fan
speed drop or malfunction of
equipment.)
Does not cool /
Does not heat
Is the external static
pressure set correctly?
Does not cool /
Does not heat
Have you recorded the
refrigerant piping length and
the refrigerant charge
amount added?
Refrigerant charge
amount is not clear
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