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TROUBLESHOOTING
WARNING!
In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the electrical breaker,
and consult authorized service personnel.
Merely turning off the unit’s power switch will not completely disconnect the unit from the power source.
Always be sure to turn off the electrical breaker to ensure that power is completely off.
Instructions relating to heating are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
Before requesting service, perform the following checks:
Symptom Problem See Page
NORMAL
FUNCTION
Doesn’t operate imme-
diately:
l If the unit is stopped and then immediately started again, the
compressor will not operate for about 3 minutes, in order to prevent
fuse blowouts.
l Whenever the electrical breaker is turned off then on again, the
protection circuit will operate for about 3 minutes, preventing unit
operation during that period.
—
Noise is heard:
l During operation and immediately after stopping the unit, the sound
of water fl owing in the air conditioner’s piping may be heard. Also,
noise may be particularly noticeable for about 2 to 3 minutes after
starting operation (sound of coolant fl owing).
—
l During Heating operation, a sizzling sound may be heard
occasionally.
This sound is produced by the Automatic Defrosting operation.
9
Smells:
l Some smell may be emitted from the indoor unit. This smell is the
result of room smells (furniture, tobacco, etc.) which have been
taken into the air conditioner.
—
Mist or steam are
emitted:
l During Cooling, a thin mist may be seen emitted from the indoor
unit.
This results from the sudden Cooling of room air by the air emitted
from the air conditioner, resulting in condensation and misting.
—
l During Heating operation, the outdoor unit’s fan may stop, and
steam may be seen rising from the unit. This is due to the Automatic
Defrosting operation.
9
Air fl ow is stopped:
l When Heating operation starts, the fan will not operate or it will
operate at a very low speed to allow the internal parts to warm
up.
l During Heating operation, if the room temperature rises above the
thermostat setting, the indoor and the outdoor unit will stop.
If you wish to warm the room further, set the thermostat to a higher
setting.
—
l During Heating operation, the unit will temporarily stop operation
(between 7 and 15 minutes) as the Automatic Defrosting mode
operates. During the Automatic Defrosting operation, will be
shown on the remote controller display.
9
l The fan may stop or operate at a very low speed when the unit is
monitoring the room’s temperature.
—
l In case of Multi-type unit, if multiple units are operated in different
operation modes as shown below, the units operated afterward
will stop and will be shown on the remote controller display
of the stopped indoor units.
Heating mode and cooling mode (or dry mode)
Heating mode and fan mode
10
Water is produced from
the outdoor unit:
l During Heating operation, water may be produced from the outdoor
unit due to the Automatic Defrosting operation.
9
thermo sensor
display on the remote
controller is fl ashing:
l The room temperature sensor may be malfunctioning. Please
consult authorized service personnel.
—
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