Temperature And Humidity Range - Fujitsu AUT Series Operating Manual

TROUBLESHOOTING
NORMAL Water is produced from
the outdoor unit:
FUNCTION
thermo sensor
display on the remote
controller is flashing:
Doesn't operate at all:
CHECK ONCE
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.

TEMPERATURE AND HUMIDITY RANGE

Permissible ranges of temperature and humidity are as follows:
Inverter model
Cooling Outdoor temperature
Operation About –10 °C to 43 °C
Indoor temperature
About 18 °C to 32 °C
Indoor humidity
Below approximately 80%. If the air
conditioner is used continuously for
many hours, water may condense
on the surface and drip.
*Heating
AU24, AU30, AU36
Operation
AU45, AU54
Indoor temperature
About below 30 °C
If the unit is used under higher temperature conditions than those noted here, the automatic protection circuit may
operate, interrupting the operation. If the unit is used under lower temperature conditions than those noted here, the heat
exchanger may freeze, causing water leakage or other malfunction.
● Do not use the air conditioner for any purpose other than room cooling, room heating or fan.
15
Symptom
● During Heating operation, water may be produced from the out-
door unit due to the Automatic Defrosting operation.
● The room temperature sensor may be malfunctioning. Please
consult authorized service personnel.
Symptom
● 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) cor-
rectly?
● Is there a window or door open?
● In the case of Cooling operation, is a window allowing bright sun-
light 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?
Outdoor temperature:
About –10 °C to 24 °C
Outdoor temperature:
About –15 °C to 24 °C
Problem
Items to check
Non-Inverter model
Cooling Outdoor temperature
Operation About 0 °C to 43 °C
Indoor temperature
About 18 °C to 32 °C
Indoor humidity
Below approximately 80%. If the air
conditioner is used continuously for
many hours, water may condense
on the surface and drip.
*Heating
AU25, AU30
Operation
AU36, AU45, AU54
Indoor temperature
About below 30 °C
See Page
9
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See Page
—
5 to 7
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Outdoor temperature:
About –7 °C to 24 °C
Outdoor temperature:
About –10 °C to 24 °C