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Before requesting service, perform the following checks:
Symptom
NORMAL
Doesn't operate immedi-
FUNCTION
ately:
Noise is heard:
Smells:
Mist or steam are
emitted:
Airflow is weak or stops:
Water is produced from
the outdoor unit:
Symptom
CHECK ONCE
Doesn't operate at all:
MORE
Poor Cooling (or Heating)
performance:
If the problem persists after performing these checks, or if you notice burning smells, stop operation immediately, turn off the
electrical breaker, and consult with authorized service personnel.
SPECIFICATIONS
REMOTE CONTROLLER (WIRED TYPE)
MODEL
UTB- LB
G If the unit is stopped and then immediately started again, the com-
pressor will not operate for about 3 minutes, in order to prevent
fuse blowouts.
G Whenever the electrical breaker is turned off then on again, the
protection circuit will operate for about 3 minutes, preventing unit
operation during that period.
G During operation and immediately after stopping the unit, the
sound of water flowing in the air conditioner's piping may be
heard. Also, noise may be particularly noticeable for about 2 to 3
minutes after starting operation (sound of coolant flowing).
G During operation, a slight squeaking sound may be heard. This is
the result of minute expansion and contraction of the panel due
to temperature changes.
G During Heating operation, a sizzling sound may be heard occa-
sional. This sound is produced by the Automatic Defrosting op-
eration.
G Some smell may be emitted from the indoor unit. This smell is
the result of room smells (furniture, tobacco, etc.) which have
been taken into the air conditioner.
G During Cooling operation, a thin mist may be seen emitted from
the indoor unit. This results from the sudden Cooling of room air
by the air emitted from the air conditioner, resulting in condensa-
tion and misting.
G During Heating operation, the outdoor unit's fan may stop, and
steam may be seen rising from the unit. This is due to Automatic
Defrosting operation.
G When Heating operation is started, fan speed is temporarily very
low, to allow internal parts to warm up.
G During Heating operation, if the room temperature rises above
the set temperature, the outdoor unit will stop, and the indoor
unit will operate at very low fan speed. If you wish to warm the
room further, set the set the temperature for a higher setting.
G During Heating operation, the unit will temporarily stop opera-
tion (between 2 and 16 minutes) as the Automatic Defrosting mode
operates. During Automatic Defrosting operation, DEFROST will
be shown on the remote controller display.
G The fan may operate at very low speed when the unit is monitor-
ing the room's temperature.
G In the monitor AUTO operation, the fan will operate at very low
speed.
G During Heating operation, water may be produced from the out-
door unit due to Automatic Defrosting operation.
G Has there been a power failure?
G Has a fuse blown out, or a circuit breaker been tripped?
G Is the main power switch set to the OFF position?
G Is the timer operating?
G Is the air filter dirty?
G Are the air conditioner's intake grille or outlet port blocked?
G Did you adjust the room temperature settings (thermostat) cor-
rectly?
G Is there a window or door open?
G In the case of Cooling operation, is a window allowing bright sun-
light to enter? (Close the curtains.)
G In the case of Cooling operation, are there heating apparatus and
computers inside the room, or are there too many people in the
room?
POWER
HEIGHT [mm]
DC 12 V
120
CAUSE and ACTION
Items to check
DIMENSIONS & WEIGHT
WIDTH [mm]
120
En-8
DEPTH [mm]
WEIGHT [g]
14
130
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