Daikin RXY5MY1 Operation Manual page 13

8-2 COOL/HEAT CANNOT BE CHANGED
OVER
• When the display shows "
(changeover under control), it shows that this
is a slave remote controller.
• When the cool/heat changeover remote con-
trol switch is installed and the display shows
" " (changeover under control).
This is because cool/heat changeover is con-
trolled by the cool/heat changeover remote con-
trol switch. Ask your Daikin dealer where the
remote control switch is installed.
8-3 FAN OPERATION IS POSSIBLE, BUT
COOLING AND HEATING DO NOT
WORK
• Immediately after the power is turned on.
The micro computer is getting ready to operate.
Wait 10 minutes.
8-4 THE FAN STRENGTH DOES NOT COR-
RESPOND TO THE SETTING
• The fan strength does no change even if the
fan strength adjustment button in pressed.
During heating operation, when the room temper-
ature reaches the set temperature, the outdoor
unit goes off and the indoor unit changes to whis-
per fan strength.
This is to prevent cold air blowing directly on occu-
pants of the room.
The fan strength will not change even if the button
is changed, when another indoor unit is in heating
operation.
8-5 THE FAN DIRECTION DOES NOT COR-
RESPOND TO THE SETTING
• The fan direction does not correspond to the
remote control display.
The fan direction does not swing.
This is because the unit is being controlled by the
micro computer.
8-6 WHITE MIST COMES OUT OF A UNIT
Indoor unit
• When humidity is high during cooling operation.
If the interior of an indoor unit is extremely con-
taminated, the temperature distribution inside a
room becomes uneven. It is necessary to clean
the interior of the indoor unit. Ask your Daikin
dealer for details on cleaning the unit. This opera-
tion requires a qualified service person.
English
• Immediately after the cooling operation stops
and if the room temperature and humidity are
low.
"
This is because warm refrigerant gas flows back
into the indoor unit and generates steam.
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.
8-7 NOISE OF AIR CONDITIONERS
Indoor unit
• A "zeen" sound is heard immediately after the
power supply is turned on.
The electronic expansion valve inside an indoor
unit starts working and makes the noise. Its vol-
ume will reduce in about one minute.
• 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.
• A low "sah", "choro-choro" sound is heard
while the indoor unit is stopped.
When the other indoor unit is in operation, this
noise is heard. In order to prevent oil and refriger-
ant from remaining in the system, a small amount
of refrigerant is kept flowing.
Indoor unit, outdoor unit
• A continuous low hissing sound is heard
when the system is in cooling or defrost oper-
ation.
This is the sound of refrigerant gas flowing
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 flow stop
or flow change.
8-8 DUST COMES OUT OF THE UNIT
• When the unit is used for the first time in a
long time.
This is because dust has gotten into the unit.
Outdoor unit
• When the tone of operating noise changes.
This noise is caused by the change of frequency.
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