Air Conditioner Operates, But Abnormalities Are Observed - Sanyo SA-99G Technical & Service Manual

7-4. Air conditioner operates, but abnormalities are observed.

7-4-1. Poor cooling
• Measure temperature of suction and
discharge air of air conditioner.
Check for clogging of air filter.
• Fan speed is set to LOW.
• Review cooling load estimate,
if performance of air conditioner is
normal.
7-4-2. Excessive cooling
• Set temperature is suitable.
Temperature
difference
is small.
Temperature difference between
suction and discharge air is
large enough (approx. 10 deg. or more).
Air filter is clogged.
YES
NO
Possibility of
gas shortage.
Clean filter.
Set fan speed to
HIGH.
Reduce cooling load or
replace the air conditioner
with larger capacity.
Set temperature to higher
value using thermostat on the
control panel.
18
Charge refrigerant
gas (R22).