Ducted Operation Manual

En-6
● Seasonal and outdoor temperature conditions, the structure of
the rooms and the number of persons present may also result in
di󰀨erences of operating e󰀩ciency. We recommend that you try various
operating patterns in order to conrm the level of heating and cooling
output provided by your units, and use the units in the way that best
matches your family's lifestyle.
● If you discover that 1 or more units delivers a low level of cooling or
heating during simultaneous operation, we recommend that you stop
simultaneous operation of the multiple units.
● Operation cannot be done in the following di󰀨erent operating modes.
Heating mode and Cooling mode (or Dry mode)
Heating mode and Fan mode
● Operation can be done in the following di󰀨erent operating modes.
Cooling mode and Dry mode
Cooling mode and Fan mode
Dry mode and Fan mode
● The operating mode (Heating mode or Cooling (Dry) mode) of the out-
door unit will be determined by the operating mode of the indoor unit
that was operated rst. If the indoor unit was started in the Fan mode,
the operating mode of the outdoor unit will not be determined.
For example, if indoor unit (A) was started in the Fan mode and then
indoor unit (B) was then operated in the Heating mode, indoor unit (A)
would temporarily start operation in the Fan mode but when indoor
unit (B) started operating in the Heating mode, indoor unit (A) would
go into standby mode. Indoor unit (B) would continue to operate in the
Heating mode.
10. TROUBLESHOOTING
WARNING
In following events, immediately stop operation of the
air conditioner, and disconnect all the power supply by
turning o󰀨 the electrical breaker or disconnecting the
power plug. Then consult your dealer or authorized
service personnel.
As long as the unit is connected to the power supply, it
is not insulated from the power supply even if the unit is
turned o󰀨.
• Unit smells of something burning or emits smoke
• Water leaks from the unit
Does not operate at all.
□ Has there been a power outage?
In this case, the unit restarts automatically after the power supply
is resumed. (Refer to page 4.)
□ Has the circuit breaker been turned o󰀨?
⇒ Turn on the circuit breaker.
□ Has a fuse blown out or the circuit breaker been tripped?
⇒ Replace the fuse or reset the circuit breaker.
□ Is the timer operating?
⇒ To check or deactivate the timer setting, refer to the operation
manual of the remote controller.
□ <When using the wireless LAN control> Is the WLAN adapter in a
rmware update?
During the rmware update of the WLAN adapter, you cannot
operate the air conditioner from the mobile app. Operate from
the remote controller or wait until the update is complete (for a
maximum of 5 minutes).
□ <When using the wireless LAN control> Is the indoor unit in a
rmware update?
During the rmware update of the indoor unit, the air conditioner
stops the operation. Wait until the update is complete. (for a
maximum of 30 minutes).
Poor cooling or heating performance.
□ Is the unit operating under the conditions except the permissible
temperature range?
In this case, the air conditioner may stop because of the automatic
protection circuit working.
□ Is the air lter dirty?
⇒ Clean the air lter. (Refer to page 4.)
□ Is the intake grille or outlet port of indoor unit blocked?
⇒ Remove the obstructions.
□ Is the room temperature adjusted appropriately?
⇒ To change the setting temperature, refer to the operation
manual of the remote controller.
□ Is a window or door left opened?
⇒ Close the window or the door.
□ Is the fan speed set to Quiet?
⇒ To change the fan speed, refer to the operation manual of the
remote controller.
□ Is the air conditioner in the Economy operation?
⇒ To stop the Economy operation, refer to the operation manual
of the remote controller.
□ <In the Cooling mode> Is direct or strong sunlight shining into the
room?
⇒ Close the curtains.
□ <In the Cooling mode> Are there other heating apparatus or com-
puters operating, or too many people in the room?
⇒ Turn the heating apparatus or computers o󰀨, or set the tem-
perature lower.
Airowisweakorstops.
□ Is the fan speed set to Quiet?
⇒ To change the fan speed, refer to the operation manual of the
remote controller.
□ Has the Fan control for energy saving set? In this case, the indoor
unit fan may stop temporarily while the Cooling operation.
⇒ To cancel the Fan control for energy saving, refer to the opera-
tion manual of the remote controller.
* This function cannot be disabled when the fan speed is set to
Auto.
□ <In the Heating mode> Have you just started the operation?
In this case, the fan rotates at very low speed temporarily to warm
up the internal parts of the unit.
□ <In the Heating mode> Is the room temperature higher than the
set temperature?
In this case, the outdoor unit stops and the indoor unit fan rotates
at very low speed.
□ <In the Heating mode> Is the Automatic defrosting operation
working? In this case, the indoor unit stops for maximum of 15
minutes. (Refer to page 4.)
□ <In the Dry mode> The indoor unit operates at low fan speed to
adjust the room humidity, and may stop from time to time.
□ <In the Auto mode> While the monitoring operation, the fan
rotates at very low speed.
□ <In multi-split connection> Are multiple units set in di󰀨erent opera-
tion mode as shown below?
In this case, the units set afterward will stop.
• Heating mode and other mode
Humidity does not drop.
□ <In the Dry operation> If the setting temperature is high, the
humidity may not drop.
⇒ To lower the humidity, lower the setting temperature.
Noise is heard.
□ Is the unit operating, or immediate after stopping operation?
In this case, refrigerant owing sound may be heard. It may be
particularly noticeable for 2-3 minutes after starting operation.
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