Fujitsu 9374379392-04 User Manual

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:

NORMAL

FUNCTION

Doesn’t operate immedi-
ately:

●  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 

protection circuit will operate for about 3 minutes, preventing unit 
operation during that period.

—

Noise is heard:

● During operation and immediately after stopping the unit, the 

sound of water fl 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 coolant fl 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.

—

*

●  During Heating operation, a sizzling sound may be heard occasion-

ally. This sound is produced by the Automatic Defrosting operation

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Smells:

●  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.

—

Mist or steam are 
emitted:

● During Cooling or Dry operation, a thin mist may be seen emit-

ted from the indoor unit. This results from the sudden Cooling of 
room air by the air emitted from the indoor unit, resulting in con-
densation and misting.

—

*

●  During Heating operation, the outdoor unit’s fan may stop, and 

steam may be seen rising from the unit. This is due to the Auto-
matic Defrosting operation.

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Airfl ow is weak or stops:

*

●  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 thermostat 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 opera-

tion (between 4 and 15 minutes) as the Automatic Defrosting 
mode operates. During the Automatic Defrosting operation, 

 will be shown on the remote controller display.

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● The fan may operate at very low speed during Dry operation or 

when the unit is monitoring the room’s temperature.

—

● During QUIET operation, the fan will operate at very low 

speed.

—

● In the monitor AUTO operation, the fan will operate at very low 

speed.

—

● In case of Multi-type unit, if multiple units are operated in differ-

ent operation modes as shown below, the units operated after-
ward will stop and the OPERATION indicator lamp (green) will 
fl ash,

 will be shown on the remote controller display. 

  Heating mode and cooling mode (or dry mode) 
  Heating mode and fan mode

16

Water is produced from 
the outdoor unit:

*

●  During Heating operation, water may be produced from the out-

door unit due to the Automatic Defrosting operation.

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The ECONOMY Indicator fl ashes

● Clean the fi lter. Afterwards, turn the ECONOMY Indicator off.

12

 thermo sensor display 

on the remote controller 
is fl ashing:

●  The room temperature sensor may be malfunctioning. Please con-

sult authorized service personnel.

—

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9/6/2010   10:36:32 AM

9/6/2010   10:36:32 AM