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Operating Tips - Fujitsu Inverter Halcyon 9374379392-04 Operating Manual

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Instructions relating to heating (*) are applicable only to "HEAT & COOL MODEL" (Reverse Cycle).
Doesn't operate at all:
Poor Cooling (or *Heating)
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.


Instructions relating to heating (*) are applicable only to "HEAT & COOL MODEL" (Reverse Cycle).
*Heating Performance
● This air conditioner operates on the heat-pump principle, absorbing heat from outdoor air and transferring that heat indoors. As
a result, the operating performance is reduced as outdoor air temperature drops. If you feel that insuffi cient heating perform-
ance is being produced, we recommend you use this air conditioner in conjunction with another type of heating appliance.
● Heat-pump air conditioners heat your entire room by recirculating 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.
*When Indoor and Outdoor Temperature are High
● When both indoor and outdoor temperatures are high during use of the heating mode, the outdoor unit's fan may stop at times.
*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 unit is equipped with a Microcomputer-controlled Automatic Defrost-
ing function. During the defrost cycle, the indoor fan will shutdown and
take anywhere from 4 to 15 minutes before the air conditioner starts up again.
● 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.
Low Ambient Cooling
● When the outdoor temperature drops, the outdoor unit's fans may switch to Low Speed, or 1 of the fans may stop intermittently.
Dual Remote Controllers (optional)
An additional remote controller can be added up to the maximum of 2 remote controllers. Either remote controller can control the
air conditioner. However, the timer functions cannot be used at the secondary unit.
Group Control
1 remote controller can control up to 16 air conditioners.
All of the air conditioners will be operated with the same settings.
Group control cannot be used when using it by the multi type.
Items to check
● 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 fi lter 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 QUIET operation?
will be displayed on the remote controller. It will
See Page
6 to 8


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