14
Operation and Performance
TROUBLESHOOTING
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
Symptom
Doesn’t operate at all:
Poor Cooling
(or *Heating)
performance:
The unit operates
differently from the
remote control unit’s
setting:
See Page
—
8 to 9
—
5
CHECK ONCE
MORE
Items to check
●
Has there been a power failure?
●
Has a fuse blown out, or a circuit breaker been tripped?
●
Is the timer operating?
●
Is the air filter dirty?
●
Are the air conditioner’s intake filter 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 sun-
light to enter? (Close the curtains.)
●
In the case of Cooling operation, are there heating apparatus and
computers inside the room, or are there too many people in the
room?
●
Are the remote control unit’s batteries dead?
●
Are the remote control unit’s batteries loaded properly?
If the problem persists after performing these checks, or if you notice burning smells, or the TIMER indicator lamp (Fig.3
6
)
flashes, immediately stop operation, disconnect the power supply, and consult authorized service personnel.
OPERATING TIPS
*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 insuffi-
cient heating performance is being produced, we recom-
mend 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 first starting the air con-
ditioner until the room is heated.
*Microcomputer-controlled Automatic Defrosting
When using the Heating mode under conditions of low
outdoor air temperature high humidity, frost may form on
the outdoor unit, resulting in reduced operating perform-
ance.
In order to prevent this kind of reduced performance, this
unit is equipped with a Microcomputer-controlled Automatic
Defrosting function. If frost forms, the air conditioner will
temporarily stop, and the defrosting circuit will operate
briefly (for about 7 to 15 minutes).
During Automatic Defrosting operation, the OPERATION
indicator lamp (red) will flash.
*When Indoor and Outdoor Temperatures are High
When both indoor and outdoor temperatures are high dur-
ing use of the heating mode, the outdoor unit’s fan may stop
at times.
*Low Ambient Cooling
When the outdoor temperature drops, the outdoor unit’s fans
may switch to Low Speed.
