(9)
Poor cooling
Check position of remote
control unit.
• Does cool air from air condi-
tioner reach remote control
unit directly ?
• Is wide tube between indoor unit
and outdoor unit insulated ?
• Measure temperatures of suction
and discharge air of indoor unit.
Change position of
remote control unit.
Insulate wide tube and
then execute taping with
narrow tube.
YES
NO
Possibility of
insufficient
refrigerant.
Charge
refrigerant
Temperature
difference
is small.
YES
• Check clogging of air
filter.
Temperature difference between
suction and discharge air is
large enough (approx. 10 deg. or more).
Clean filter.
Air filter is clogged.
Set fan speed to either
HIGH or MEDIUM.
• Is fan speed set to LOW ?
Reduce cooling load or
replace the unit with
higher cooling capacity.
• Review cooling load estimate,
if performance of air conditioner
is normal.
YES
(10)
Excessive cooling.
• Set temperature is too low.
• Is remote control unit placed
where it can detect room
temperature properly ?
Set temperature to
higher value using
temperature setting
button of remote
control unit.
Change position of
remote control unit.
YES
NO
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