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8-4. Air conditioner operates, but abnormalities are observed.
8-4-1. Indoor unit operates, but there is no cooling.
Check solenoid valve in outdoor unit.
8-4-2. Poor cooling.
Measure coil resistance of solenoid valve
(SVA , SVB)
Clean filter.
Air filter is clogged.
Fan speed is set to LOW.
•
NO
YES
Review cooling load estimate,
if performance of air conditioner is
normal.
•
Insulate both wide and
narrow tubes
separately and then
tape together.
Reduce cooling load
or replace the air
conditioner with
larger capacity.
Temperature
difference
is small.
YES
Charge
refrigerant
gas (R407c).
•
•
Temperature difference between
suction and discharge air is
large enough (approx. 10 deg. or more).
Check for clogging of air filter.
Measure temperature of suction
and discharge air of air conditioner.
Wide and narrow tubes between
indoor unit and outdoor unit are
insulated.
•
Possibility of
gas shortage.
Set fan speed to either
HIGH or MEDIUM.
Check position of remote control unit.
Cool air from air conditioner
reaches position directly.
YES
Change position of
remote control unit.
•
•
