Troubleshooting - Fujitsu Inverter ASTG09JECA Operating Manual

TROUBLESHOOTING

WARNING
Before requesting service, perform the following checks:
NORMAL Doesn't operate
FUNCTION immediately:
Noise is heard:
Smells:
Mist or steam is emitted:
AirÀ ow is weak or stops:
CHECK ONCE Doesn't operate at all:
MORE
Poor Cooling 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 (Fig. 3 5)
and the TIMER Indicator Lamp (Fig. 3 6) À ashes, and ECONOMY Indicator Lamp (Fig.3 7) À ashes fast. Immediately stop opera-
tion, turn off the electrical breaker and consult authorized service personnel.
16
In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the electrical
breaker and consult authorized service personnel.
Merely turning off the unit's power switch will not completely disconnect the unit from the power source.
Always be sure to turn off the electrical breaker to ensure that power is completely off.
Symptom
● If the indoor unit is stopped and then immediately started again,
the compressor will not operate for about 3 minutes, in order to
prevent fuse blowouts.
● 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.
● During operation or immediately after stopping the unit, the sound
of water À owing 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 refrigerant À owing).
● During operation, a slight squeaking sound may be heard. This is
the result of minute expansion and contraction of the front panel
due to temperature changes.
● 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 indoor unit.
● During Cooling or Dry operation, a thin mist may be seen emitted
from the indoor unit. This results from the sudden Cooling of room
air by the cool air emitted from the indoor unit, resulting in con-
densation and misting.
● During Dry mode, the indoor unit will operate at low speed; in or-
der to adjust room humidity, the indoor unit's fan may stop from
time to time. Also, the fan may operate at very low speed when
adjusting room humidity.
● During SUPER QUIET operation, the fan will operate at very low speed.
● In the monitor of AUTO operation, the fan will operate at very low
speed.
Symptom
● 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 (thermostat) correctly?
● 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?
Problem
Items to check
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