Troubleshooting; Operation - Fujitsu Inverter Operating Manual

TROUBLESHOOTING

Instructions relating to heating (*) are applicable only to "HEAT & COOL MODEL" (Reverse Cycle).
WARNING!
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:
thermo sensor
display on the remote
controller is flashing:
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 electric
breaker, and consult with authorized service personnel.
En-13
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.
Before requesting service, perform the following checks:
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.
Whenever the electrical breaker is turned off then on again, the protec-
tion circuit will operate for about 3 minutes, preventing unit operation
during that period.
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).
* During Heating operation, a sizzling sound may be heard occasionally.
This sound is produced by the Automatic Defrosting operation.
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.
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
air emitted from the air conditioner, resulting in condensation and mist-
ing.
* During Heating operation, the outdoor unit's fan may stop, and steam
may be seen rising from the unit. This is due to the Automatic Defrost-
ing operation.
* When Heating operation is started, fan speed is temporarily very low, to
allow internal parts to warm up.
* During Heating operation, if the room temperature rises above the ther-
mostat setting, 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
thermostat to a higher setting.
* During Heating operation, the unit will temporarily stop operation (between
4 and 15 minutes) as the Automatic Defrosting mode operates. During
the Automatic Defrosting operation,
controller display.
The fan may operate at very low speed during Dry operation or when
the unit is monitoring the room's temperature.
In the monitor AUTO operation, the fan will operate at very low speed.
* During Heating operation, water may be produced from the outdoor unit
due to the Automatic Defrosting operation.
The room temperature sensor may be malfunctioning. Please consult
authorized service personnel.
Has the circuit breaker been turned 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 dusty?
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?
Problem
will be shown on the remote
See
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