Trouble Shooting - Daikin RXYMQ36MVJU Operation Manual

Trouble Shooting

These cases are not troubles.
The following cases are not air conditioner troubles but have some reasons. You may just continue using it.
Case
The air conditioner does not operate at all.
When the breaker is OFF.
•
When the power is interrupted.
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Operation does not start soon.
When ON/OFF button was pressed soon after
•
operation was stopped.
When the mode was reselected.
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Hot air does not flow out soon after the power
supply is turned on.
The heating operation stops suddenly and a
flowing sound is heard.
A "Zeen" sound is heard immediately after the
power supply is turned on.
A continuous low "Shah" sound is heard when
the system is in COOLING OPERATION or at a
stop.
A "Pishi-pishi" squeaking sound is heard when
the system stops after HEATING OPERATION.
A low "Sah", "Choro-choro" sound is heard
while an indoor unit has stopped.
A continuous low "Shuh" sound is heard when
the systems is in COOLING or DEFROST OPER-
ATION.
A "Shuh" sound which is heard at the start or
immediately after the stop of operation or which
is heard at the start or immediately after the
stop of DEFROST OPERATION.
When the tone of operating noise changes.
A continuous "shuh" sound generated during
operation or immediately after the operation is
started or stopped.
The outdoor unit emits water or steam.
Mists come out of the indoor unit.
The indoor unit gives out odour.
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Set to ON the breaker.
•
Wait until the power is recovered, then operate the air conditioner again. The air conditioner
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automatically resumes operation in about 3 minutes. You should just wait for a while.
This is to protect the air conditioner.
•
You should wait for about 5 minutes.
The micro computer is preparing for operation.
Wait for about 10 minutes.
The air conditioner is warming up. You should wait for about 1 minutes.
•
(The system is designed to start discharging air only after it has reached a certain tempera-
ture.)
The system is taking away the frost on the outdoor unit.
•
You should wait for about 3 to 8 minutes. (Max. 10 minutes).
This sound indicates that the valve for the refrigerant bypass is in operation.
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The electronic expansion ∗ valve inside an indoor unit starts working and makes the noise.
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Its volume will reduce in about one minute.
∗ Electronic expansion valve ... Controls the flow rate of the gas (refrigerant) flowing inside
the indoor unit.
When the drain pump (optional accessory) is in operation, this noise is heard.
•
Expansion and contraction of plastic parts caused by temperature change makes this
•
noise.
When the other indoor unit is in operation, this noise is heard. In order to prevent oil and
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refrigerant from remaining in the system, a small amount of refrigerant is kept flowing.
This is the sound of refrigerant gas flowing through both indoor and outdoor units.
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This is the noise of refrigerant caused by flow stop and flow change.
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This noise caused by the change of frequency.
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This sound indicates that the valve for the refrigerant bypass is in operation.
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I In HEATING mode
The frost on the outdoor unit melts into water or steam when the air conditioner is in
•
defrost operation.
I In COOLING or DRY mode
Moisture in the air condenses into water on the cool surface of outdoor unit piping and
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drips.
This happens when the air in the room is cooled into mist by the cold air flow during cooling
•
operation.
If the inside of an indoor unit is extremely contaminated, the temperature distribution inside a
•
room becomes uneven. It is necessary to clean the inside of the indoor unit. Ask your dealer for
details on cleaning the indoor unit. This operation requires a qualified service person.
I This happens when smells of the room, furniture, or cigarettes are absorbed into the unit
and discharged with the air flow.
(If this happens, we recommend you to have the indoor unit washed by a technician. Con-
sult the service shop where you bought the air conditioner.)
Explanation