Air Conditioner Operates, But Abnormalities Are Observed - Sanyo SAP-K77GHAX Technical & Service Manual

9-4. Air conditioner operates, but abnormalities are observed.

9-4-1. Poor cooling.
Is remote control unit placed where
it can detect room temperature
properly ?
Are wide and narrow tubes between
indoor unit and outdoor unit
insulated ?
Measure temperature of suction and
discharge air of air conditioner.
Is temperature difference between
suction and discharge air large enough ?
(approx. 10 deg. or more).
Check for clogging of air filter.
Is fan speed set to LOW ?
If performance of air conditioner is
normal, review cooling load estimate.
9-4-2. Excessive cooling.
Is set temperature suitable ?
Is remote control unit placed where
it can detect room temperature
properly ?
No
No
Yes
Yes
Yes
No
No
Change position of remote
control unit.
Insulate both wide and narrow
tubes separately and then
tape together.
If temperature difference
is small, possibility of
gas shortage.
Reduce cooling load or
replace the air conditioner
with larger capacity.
Set temperature to higher
value using temperature
setting buttons of the remote
control unit.
Change position of remote
control unit.
61
Charge refrigerant
gas (R22).
If air filter is clogged,
clean the filter.
Set fan speed to either
HIGH or MEDIUM.