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6. FOLLOWING SYMPTOMS ARE NOT AIR
CONDITIONER TROUBLES
Symptom 1: The system does not operate
■ The air conditioner does not start immediately after the ON/OFF
button on the romote controller is pressed.
If the operation lamp lights, the system is in normal condition.To
prevent overloading of the compressor motor, the air conditioner
starts 3 minutes after it is turned ON.
■ If the operation lamp and the "PRE-DEF indicator(cooling and
heating type) or fan only indicator(cooling only type)" light, it
means you choose the heating model, When just starting, if the
compressor has not started, the indoor unit appears "anti cold
wind" protection because of its overlow outlet temperature.
Symptom 2: Change into the fan mode
during cooling mode
■ In order to prevent the indoor evaporator frosting, the system will
change into fan mode automatically, restore to the cooling mode
after soon.
■ When the room temperature drops to the set temperature, the
compressor goes o and the indoor unit changes to fan mode;
when the temperature rises up, the compressor starts again. It is
same in the heating mode.
Symptom 3: White mist comes out of a unit
Symptom 3.1: Indoor unit
■ When humidity is high during cooling operation If the interior
of an indoor unit is extremely contaminated, the temperature
distribution inside a room becomes uneven. It is necessary to
clean the interior of the indoor unit. Ask your dealer for details on
cleaning the unit. This operation requires a qualied service erson
Symptom 3.2: Indoor unit, outdoor unit
■ When the system is changed over to heating operation after
defrost operation Moisture generated by defrost becomes steam
and is exhausted.
Sptom 4: Noise of air conditionerscooling
Symptom 4.1: Indoor unit
■ A continuous low "shah" sound is heard when the system is in
cooling operation or at a stop.
When the drain pump (optional accessories) is in operation,this
noise is heard.
■ A "pishi-pishi" squeaking sound is heard when the system stops
after heating operation.
Expansion and contraction of plastic parts caused by temperature
change make this noise.
Symptom 4.2: Indoor unit, outdoor unit
■ A continuous low hissing sound is heard when the system is in
operation.
This is the sound of refrigerant gas owing through both indoor
and outdoor units.
■ A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation.
This is the noise of refrigerant caused by ow stop or ow
change.
Symptom 4.3: Outdoor unit
■ When the tone of operating noise changes.
This noise is caused by the change of frequency.
Symptom 5: Dust comes out of the unit
■ When the unit is used for the rst time in a long time.
This is because dust has gotten into the unit.
Symptom 6: The units can give o odours
■ The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.
Symptom 7: The outdoor unit fan does not spin.
■ During operation. The speed of the fan is controlled in order to
optimize product operation.
7. TROUBLESHOOTING
7.1. Troubles and causes of air conditioner
If one of the following malfunctions occur, stop operation,
shut o the power, and contact with your dealer.
■ The operation lamp is ashing rapidly (twice every second)
This lamp is still ashing rapidly after turn o the power and turn
on again.
■ Remote controller receives malfunction or the button does not
work well.
■ A safety device such as a fuse, a breaker frequently actuates.
■ Obstacles and water enter the unit.
■ Water leaks from indoor unit.
■ Other malfunctions.
If the system does not properly operate except the
above mentioned cases or the above mentioned
malfunctions is evident, investigate the system according
to the following procedures. (see in Table 7-1)
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