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■ Malfunctions caused by other electrical
devices
Use of other electrical appliances such as an electric shaver or nearby
use of a wireless radio transmitter may cause the malfunction of the air
conditioner.
If you encounter such a malfunction, turn off the circuit breaker once.
Then turn it on again, and resume operation by using the remote
controller.
■ Indoor unit temperature and humidity range
Permissible ranges of temperature and humidity are as follows:
Indoor temperature
Cooling/Dry
Heating
Indoor humidity
*1) If the air conditioner is used continuously for many hours, water may
condense on the surface and drip.
• If the unit is operated under the conditions except the permissible
temperature range, the air conditioner operation may stop because
of the automatic protection circuit working.
• Depending on the operating conditions, the heat exchanger may
freeze, causing water leakage or other malfunction (in the Cooling
or Dry mode).
■ Other information
• Do not use the air conditioner for any purpose other than room
cooling/dry, room heating or fan.
• For the permissible ranges of temperature and humidity for the
outdoor unit, refer to the outdoor unit installation manual.
12. OPTIONAL PARTS
12.1. Wired remote controller
The optional wired remote controller can be used.
You can use wired and wireless remote controller together.
However, some functions of the wireless remote controller are restricted.
If you set the restricted functions, beeping sound will be heard, [ ], [
and [
] indicators on the indoor unit will blink.
<Restricted functions for wireless remote controller>
When using together with wired remote controller (2-wire)
• Powerful operation
Group control
One remote controller can control up to 16 air conditioners. All of the air
conditioners will be operated with the same settings.
13. TROUBLESHOOTING
In the following events, immediately stop operation of
the air conditioner, and disconnect all the power supply
by turning off 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 off.
• Unit smells of something burning or emits smoke
• Water leaks from the unit
[°C]
18 to 32
[°C]
16 to 30
[%]
80 or less *
WARNING
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 8.)
□ Has the circuit breaker been turned off?
⇒ 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 page 5.
Poor cooling or heating performance.
□ Is the unit operating under the conditions except the permissible
temperature range?
1)
In this case, the air conditioner may stop because of the automatic
protection circuit working.
□ Do you have an arrangement with your electric company for
Demand Response?
In this case, the air conditioning performance may become lower
or the operation may stop. (Refer to page 6.)
□ Is the air fi lter dirty?
⇒ Clean the air fi lter. (Refer to page 7.)
□ Is the intake grille or outlet port of indoor unit blocked?
⇒ Remove the obstructions.
□ Is the room temperature adjusted appropriately?
⇒ To change the temperature setting, refer to page 5.
□ 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 page 5.
□ <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 off, or set the tem-
perature lower. (Refer to page 5.)
Humidity does not drop during the Dry operation.
],
□ You cannot set the target humidity in the Dry mode. If you feel
high humidity, set the temperature lower.
Airfl ow is weak or stops.
□ Is the fan speed set to Quiet?
⇒ To change the fan speed, refer to page 5.
□ 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 page 6.
□ <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 [ ] indicator blinking?
In this case, the Automatic defrosting operation is working. The
indoor unit stops for maximum of 15 minutes. (Refer to page 8.)
□ <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.
Noise is heard.
□ Is the unit operating, or immediate after stopping operation?
In this case, refrigerant fl owing sound may be heard. It may be
particularly noticeable for 2-3 minutes after starting operation.
□ Do you hear a slight squeaking sound during the operation?
This sound is produced by the minute expansion and contraction
of the front panel caused by temperature change.
□ <In the Heating mode> Do you hear a sizzling sound?
This sound is produced by the Automatic defrosting operation.
(Refer to page 8.)
En-9
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