Air Conditioner Operates, But Abnormalities Are Observed - Technibel MCAV127C5VAB Technical Data & Service Manual

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

7-4-1. Poor cooling
Check position of remote control unit.
•
•
Cool air from air conditioner
reaches position directly.
Wide and narrow tubes between
•
indoor unit and outdoor unit are
insulated.
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.
• Remote control unit is placed
where it can detect room
temperature properly.
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
NO
NO
Change position of
remote control unit.
Insulate both wide and
narrow tubes
separately and then
tape together.
Possibility of
gas shortage.
Clean filter.
Set fan speed to either
HIGH or MEDIUM.
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.
22
Charge
refrigerant
gas (R22).