16
Symptom
Problem
See page
CHECK ONCE
MORE
Does not operate at all:
M
Has the circuit breaker been turned off?
M
Has there been a power failure?
M
Has a fuse blown out, or a circuit breaker been tripped?
—
M
Is the timer operating?
9 to 10
Poor cooling (or heating*)
performance:
M
Is the air filter dirty?
M
Are the air conditioner’s intake grille or outlet port blocked?
M
Did you adjust the room temperature settings (thermostat)
correctly?
M
Is there a window or door open?
M
In the case of cooling operation, is a window allowing bright
sunlight to enter? (close the curtains.)
M
In the case of cooling operation, are there heating apparatus
and computers inside the room, or are there too many people
in the room?
—
M
Is the unit set for QUIET operation?
—
The unit operates differ-
e n t l y f r o m t h e r e m o t e
controller setting:
M
Are the remote controller batteries dead?
M
Are the remote controller batteries loaded properly?
6
TROUBLESHOOTING
If the problem persists after performing these checks, or if you notice burning smells, or the OPERATION indicator lamp and the
TIMER indicator lamp flashes, and ECONOMY indicator lamp flashes fast. Immediately stop operation, turn off the electrical breaker
and consult authorized service personnel.
Microcomputer-controlled Automatic Defrosting*
M
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 defrost-
ing function. If frost forms, the air conditioner will temporarily
stop, and the defrosting circuit will operate briefly (for about
4 to 15 minutes).
During automatic defrosting operation, the OPERATION
indicator lamp (green) will flash.
Low Ambient Cooling*
M
When the outdoor temperature drops, the outdoor unit’s fans
may switch to low speed.
Hot Start (for heating)*
M
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 tempera-
ture.
Heating Performance*
M
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 insufficient
heating performance is being produced, we recommend you
use this air conditioner in conjunction with another kind of
heating appliance.
M
Heat-pump air conditioners heat your entire room by recircu-
lating air throughout the room, with the result that some time
may be required after first starting the air conditioner until the
room is heated.
When Indoor and Outdoor Temperature are High*
M
When both indoor and outdoor temperatures are high during
use of the heating mode, the outdoor unit’s fan may stop at
times.
OPERATING TIPS
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
**Dual Remote Controllers (optional)
An additional remote controller can be added up to the maximum of 2 remote controllers. Either remote controller can control the air
conditioner. However, the timer functions cannot be used at the secondary unit.
**Group Control
1 remote controller can control up to 16 air conditioners. All of the air conditioners will be operated with the same settings.
The wired remote controller option is required to use the following functions (**).
