17
TROUBLESHOOTING
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
OPERATING TIPS
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
Microcomputer-controlled Automatic
Defrosting*
●
When using the heating mode under conditions of low outdoor
temperature and high humidity, frost may form on the outdoor unit,
resulting in reduced operating performance.
In order to prevent this kind of reduced performance, this unit is
equipped with a microcomputer-controlled automatic defrosting
function. During the defrost cycle, the indoor fan will shutdown and
will be displayed on the remote controller. It will take anywhere
from 4 to 15 minutes before the air conditioner starts up again.
●
After heating operation stops, if frost forms on the outdoor
unit, the unit will start automatic defrosting operation. At this
time, the outdoor unit will automatically stop after operating
for a few minutes.
Low Ambient Cooling
When the outdoor temperature drops, the outdoor unit’s fans may switch
to low speed, or one of the fans may stop intermittently.
Hot Start*
The indoor unit prevents cold drafts when heating operation begins.
The indoor unit fan will not operate or it will operate at a very low speed
until the heat exchanger reaches the set temperature.
Dual Remote Controllers (optional)
An additional remote controller can be added up to the maximum of two
remote controllers. Either remote controller can control the air conditioner.
However, the timer functions cannot be used at the slave unit.
Group Control
One remote controller can control up to 16 air conditioners.
All of the air conditioners will be operated with the same settings.
Heating Performance*
●
This air conditioner operates on the heat-pump principle, absorbing
heat from outdoor air and transferring that heat indoors. As a result,
the operating performance is reduced as outdoor air temperature
drops. If you feel that insuf cient heating performance is being pro-
duced, we recommend you use this air conditioner in conjunction
with another kind of heating appliance.
●
Heat-pump air conditioners heat your entire room by recirculating air
throughout the room, with the result that some time may be required
after rst starting the air conditioner until the room is heated.
When Indoor and Outdoor Temperature
are High*
When both indoor and outdoor temperatures are high during use of the
heating mode, the outdoor unit’s fan may stop at times.
Fan speed: AUTO
Heating*:
The fan will operate at very low speed when the temperature
of the air issued from the indoor unit is low.
Cooling:
As the room temperature approaches that of the set tempera-
ture, the fan speed becomes slower.
Fan:
The fan runs at the low fan speed.
Symptom
Items to check
See Page
CHECK ONCE
MORE
Does not operate at all:
●
Has the circuit breaker been turned off?
●
Has there been a power failure?
●
Has a fuse blown out, or a circuit breaker been tripped?
—
●
Is the timer operating?
9 to 11
Poor cooling (or heating*)
performance:
●
Is the air lter dirty?
●
Are the air conditioner’s intake grille or outlet port blocked?
●
Did you adjust the room temperature settings (thermostat) cor-
rectly?
●
Is there a window or door open?
●
In the case of cooling operation, is a window allowing bright sunlight
to enter? (Close the curtains.)
●
In the case of cooling operation, are there heating apparatus and com-
puters inside the room, or are there too many people in the room?
●
Is the unit set for QUIET operation?
—
●
Is the unit set for QUIET operation?
—
If the problem persists after performing these checks, or if you notice burning smells, stop operation immediately, disconnect the
power supply, and consult with authorized service personnel.
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