Operating Tips - Fujitsu UTY-LNHUM Operating Manual

TROUBLESHOOTING
Symptom
CHECK ONCE Doesn't operate at all:
MORE
Poor Cooling (or Heating)
performance:
The unit operates
differently from the Remote
Controller's 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 fl ashes, immediately stop operation, turn off the electrical breaker and consult authorized service personnel.

OPERATING TIPS

Operation and Performance
Heating Performance
● This air conditioner operates on the heat-pump principle,
absorbing heat from outdoor air and transferring that heat to
indoor unit. 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 recommend you
use this air conditioner in conjunction with another kind of
heating appliance.
● 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 fi rst starting the air conditioner until the
room is heated.
● Has the circuit breaker been turn off?
● 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 grille or outlet port blocked?
● Did you adjust the room temperature settings (temperature) 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
computers inside the room, or are there too many people in the
room?
● Is the unit set for SUPER QUIET operation?
● Are the Remote Controller's batteries dead?
● Are the Remote Controller's batteries loaded properly?
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 air conditioner is equipped with a Microcomputer-
controlled Automatic Defrosting function. If frost forms, the air
conditioner will temporarily stop, and the defrosting circuit will
operate briefl y (for about 7-15 minutes).
During Automatic Defrosting operation, the OPERATION
Indicator Lamp (green) will fl ash.
● 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.
(However, some type of multi-type air conditioner doesn't
provide this function.)
Problem See Page
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