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Phone Calls From Customers
The room cannot be cooled or heated suf-
ficiently.
Sound
1 A gas escaping sound is heard
comes out
sometimes.
from the
air condi-
tioner.
2 A cracking sound is heard
sometimes.
3 A buzzing sound is heard
sometimes.
4 A ticking sound is heard from
the outdoor unit sometimes.
5 A sound, similar to water flow-
ing, is heard from the unit.
Something
1 The fan speed does not match
is wrong
the setting of the remote con-
with the
troller during DRY operation.
blower.....
(No air comes out sometimes
during DRY operation.)
2 The fan speed does not match
the setting of the remote con-
troller in HEAT operation.
OCH653C
How to Respond
1 Check the set temperature of remote controller.
The outdoor unit cannot be operated if the set
temperature is not appropriate.
The outdoor unit operates in the following modes.
COOL: When the set temperature is lower
than the room temperature.
HEAT: When the set temperature is higher
than the room temperature.
2 Check if filters are not dirty and clogged. If filters
are clogged, the airflow amount will be reduced
and the unit capacity will be lowered. See the
instruction manual that came with the product for
how to clean the filters.
3 Check there is enough space around the air con-
ditioner.
If there are any obstacles in the air intake or
air outlet of indoor/outdoor units, they block the
airflow direction so that the unit capacity will be
lowered.
1 This is not a malfunction.
This is the sound when the flow of refrigerant in
the air conditioner is switched.
2 This is not a malfunction.
This is the sound when internal parts of units
expand or contract when the temperature
changes.
3 This is not a malfunction.
This is the sound when the outdoor unit starts
operating.
4 This is not a malfunction.
This is the sound when the fan of the outdoor unit
is controlling the airflow amount in order to keep
the optimum operating condition.
5 This is not a malfunction.
This is the sound when the refrigerant is flowing
inside the indoor unit.
1 This is not a malfunction.
During the DRY operation, the blower's ON/OFF
is controlled by the microprocessor to prevent
overcooling and to ensure efficient dehumidifica-
tion. The fan speed cannot be set by the remote
controller during DRY operation.
2 This is not a malfunction.
1) When the HEAT operation starts, to prevent
the unit from blowing cold air, the fan speed
is gradually increased from zero to the set
speed, in proportion to the temperature rise of
the discharged air.
2) When the room temperature reaches the set
temperature and the outdoor unit stops, the
unit starts the LOW AIR operation.
3) During the HEAT operation, the DEFROST
operation is performed to defrost the outdoor
unit. During the DEFROST operation, the
blower is stopped to prevent cold air coming
out of the indoor unit.
56
Note
-
-
-
-
-
-
-
-
-
The up/down vane will be
automatically set to hori-
zontal blow in these cases
listed up on the left (1–3).
After a while, the up/down
vane will be automatically
moved according to the set-
ting of the remote controller.
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