–
51
–
4
(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 ?
0636_X_S
• Measure temperatures of suction
and discharge air of indoor unit.
Change installation
position of remote
control unit.
Insulate wide tube and
then execute taping with
narrow tube.
YES
NO
Possibility of
refrigerant
shortage.
Charge
refrigerant
(R22).
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
4. SERVICE PROCEDURES
