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4. SERVICE PROCEDURES
(9)
Poor cooling
Check installation 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.
• Check clogging of air
filter.
• Is fan speed set to LOW ?
• Review cooling load estimate,
if performance of air conditioner
is normal.
YES
NO
YES
Temperature
difference
is small.
Temperature difference between
suction and discharge air is
large enough (Approx. 10 deg. or more).
Air filter is clogged.
YES
Change installation
position of remote
control unit.
Insulate wide tube and
then execute taping with
narrow tube.
Possibility of
refrigerant
shortage.
Clean filter.
Set fan speed to either
HIGH or MEDIUM.
Reduce cooling load or
replace the unit with
higher cooling capacity.
51
–
–
Charge
refrigerant
(R22).
0636_X_S
4
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