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TROUBLESHOOTING
CHECK ONCE
Does not operate at all:
MORE
Poor cooling (or heating*)
performance:
The unit operates differ-
ently from the remote con-
troller setting:
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.
OPERATING TIPS
Instructions relating to heating (*) are applicable only to "HEAT & COOL MODEL" (Reverse Cycle).
Heating Performance
This air conditioner operates on the heat-pump principle,
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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.
Heat-pump air conditioners heat your entire room by recircu-
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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
When both indoor and outdoor temperatures are high during use
of the heating mode, the outdoor unit's fan may stop at times.
En-16
Symptom
Has the circuit breaker been turned off?
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Has there been a power failure?
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Has a fuse blown out, or a circuit breaker been tripped?
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Is the timer operating?
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Is the air filter dirty?
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Are the air conditioner's intake grille or outlet port blocked?
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Did you adjust the room temperature settings (thermostat)
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correctly?
Is there a window or door open?
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In the case of cooling operation, is a window allowing bright
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sunlight to enter? (Close the curtains.)
In the case of cooling operation, are there heating apparatus
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and computers inside the room, or are there too many people
in the room?
Is the unit set for QUIET operation?
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Are the remote controller's batteries dead?
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Are the remote controller's batteries loaded properly?
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*
Problem
Microcomputer-controlled Automatic Defrosting
When using the heating mode under conditions of low outdoor
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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.
After heating operation stops, if frost forms on the outdoor
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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.
Hot Start (for heating)
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.
See page
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9 to 10
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