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OPERATION DETAILS

Temperature and Humidity Range

Permissible range of temprature and humidity are as follows:

Operation and Performance

* Heating Performance

This air conditioner uses a heat pump which absorbs heat
from outside air and brings it indoors. As a result, its heat-
ing performance is reduced as the temperature of out-
side air drops. If you find that insufficient room heat is
produced, we recommend that you use the air conditioner
together with other heating appliances.

Heat-pump type air conditioners use warm-air
recirculation to warm your entire room. As a result, some
time will be required after starting operation until your
entire room becomes warm.

* Microcomputer-controlled Automatic Defrosting

When the outside temperature is low and the humidity high,
frost will collect on the outside unit, reducing heater effi-
ciency. When this happens, the computer will automatically
start the defrost cycle. During the defrost cycle, the indoor
fan will shutdown and  DEFROST  will be displayed on the
remote controller. It will take anywhere from 4 to 15 min-
utes before the air conditioner starts up again.

* When Indoor and Outdoor Temperatures are High

When both indoor and outdoor temperatures are high dur-
ing use of the heating mode, the outdoor unit’s fan may stop
at times.

Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).

Please read and understand the following details regarding this air conditioner.

Low Ambient Cooling

When the outdoor temperature drops, the outdoor unit’s fans
may switch to Low Speed, or one of the fans may stop inter-
mittently.

Should the power supply to the air conditioner be inter-
rupted by a power failure, the air conditioner will restart
automatically in the previously selected mode once the
power is restored.

AUTO Restart

In Event of Power Interruption

Use of other electrical appliances (electric shaver, etc.) or
nearby use of a wireless radio transmitter may cause the
air conditioner to malfunction. In this event, temporarily
turn off the circuit breaker turn it on again and then use
the remote controller to resume operation.

Cooling Mode

About 0 to 46 °C

About 0 to 46 °C

About 18 °C to 30 °C

About 80 % or less

If the unit is used for long pe-
riods under high-humidity
conditions, condensation
may form on the surface of
the indoor unit, and drip onto
the floor or other objects un-
derneath.

*Heating Mode

About –10 to 21 °C

About below 30 °C

Outdoor temperature

Indoor temperature

Indoor humidity

COOLING MODEL

HEAT & COOL MODEL

(Reverse Cycle)

If the air conditioner is operated under higher temperature conditions than those listed, the built-in protection circuit may
operate to prevent internal circuit damage. Also, during Cooling mode, if the unit is used under conditions of lower tem-
peratures than those listed above, the heat-exchanger may freeze, leading to water leakage and other damage.

Do not use this unit for any purposes other than the Cooling, (*)Heating, Dehumidifying, and air-circulation of rooms in
ordinary dwellings.

Summary of Contents for AOT90EP

Page 1: ...KEEP THIS OPERATION MANUAL FOR FUTURE REFERENCE FUJITSU GENERAL LIMITED P N9365350010 Indoor Unit ART90EL 3 ART90TL 3 Outdoor Unit AOT90EP 3 AOT90TP 3 OPERATING MANUAL AIR CONDITIONER DUCT TYPE ...

Page 2: ...arting the unit Do not drink the water drained from the air conditioner Do not use in applications involving the storage of foods plants or animals precision equipment or art works Do not apply any heavy pressure to radiator fins Operate only with air filters installed Do not block or cover the intake grille and outlet port Ensure that any electronic equipment is at least one metre away from eithe...

Page 3: ...rt 3 Drain Pipe Main 4 Drain Pipe Safety Fig 2 Outdoor Unit 5 Air intake 6 Air outlet Fig 3 Remote Controller 7 START STOP Button 8 Operation Lamp 9 ENERGY SAVE Button 0 DAY OFF Button A ENERGY SAVE Lamp B ZONE Control Button C SET Button D ZONE Control Lamp E CLOCK ADJUST Button F TIMER MODE Button G SET TIME Button H SET TEMP DAY Button I FAN CONTROL Button J MASTER CONTROL Button K Remote Contr...

Page 4: ...nd the time display stops flashing PREPARATION CLOCK DAY AUTO TIMER MODE SET ZONE START STOP CLOCK ADJUST SET TIME TEMP DAY FAN CONTROL MASTER CONTROL 2 1 AUTO DEFROST TEST DAY OFF ENERGY SAVE 3 2 1 Instructions relating to heating are applicable only to HEAT COOL MODEL Reverse Cycle To Select Mode Operation 1 Press the START STOP button The unit will start and the remote controller s operation la...

Page 5: ...he timer time Use to advance the time forward Use to turn the time back Press once to move the time 1 minute hold down and the time will move 10 minutes at a time Example Setting the OFF TIMER to 23 35 c To confirm or Change Settings Before Starting Operation To confirm settings Press the TIMER MODE button once The timer setting information will be displayed for 15 seconds after the TIMER MODE but...

Page 6: ...nd then proceed as fol lows 1 Press the TIMER MODE button so that WEEKLY ap pears on the display The display now shows the current day by DAY CODE the first ON and OFF times for the day the WEEKLY 1 times the fan speed and the operating mode The top time value gives the ON time and the bottom value gives the OFF time If either time is not set the corresponding time display is blank 2 Press the SET...

Page 7: ...ompleting the WEEKLY 1 settings for that day The display switches to WEEKLY 2 and the day s second ON time be gins flashing 8 Repeat the operations described in Steps 4 to 7 to set the second ON and OFF times for the day the WEEKLY 2 times When you press the SET button after setting the WEEKLY 2 OFF time the system registers the WEEKLY 2 settings for the day and returns you to the WEEKLY 1 ON time...

Page 8: ...play 2 Press the SET TEMP DAY button to select the day that you want check 3 Press the SET TIME button or to switch between the WEEKLY 1 or WEEKLY 2 time displays Cancelling Selected Time Settings Press the START STOP button to stop the air conditioner and then proceed as fol lows 1 Carry out steps 1 to 3 of the Setting Up the Weekly Timer Operation procedure to select the day you want to edit 2 P...

Page 9: ...y flashes briefly and then the clock display appears c c c c Example Changing the WEEKLY 2 ON setting for day 5 Friday from 14 00 to 15 30 TIMER DAY WEEKLY AUTO ON OFF TIMER MODE SET ZONE START STOP CLOCK ADJUST SET TIME TEMP DAY FAN CONTROL MASTER CONTROL 2 1 AUTO DEFROST TEST DAY OFF ENERGY SAVE 2 TIMER DAY WEEKLY AUTO ON OFF TIMER MODE SET ZONE START STOP CLOCK ADJUST SET TIME TEMP DAY FAN CONT...

Page 10: ...eding day DAY OFF day C CLOCK TIMER TEMP WEEKLY AUTO DAY OFF TIMER SET TIME TEMP DAY FAN 2 1 HIGH AUTO COOL DEFROST TEST Using the DAY OFF Setting Press the START STOP button to stop the air conditioner and then proceed as fol lows 1 Carry out steps 1 to 2 of the Setting Up the Weekly Timer Operation procedure to select the day that you want to set as the DAY OFF 2 Press the DAY OFF button The DAY...

Page 11: ...AVE button while the air conditioner is on it will change to the conservation mode If you press the ENERGY SAVE button while the unit is in the timer mode ON timer WEEKLY timer the unit will go into the conserva tion mode when the unit starts with the timer If you turn off the air conditioner while in the conservation mode the mode will be shut off The temperature set on the remote controller will...

Page 12: ...al injury could result CARE AND MAINTENANCE CAUTION Installing the Air Filter Be sure the filter is always installed in the inlet air grille of the indoor unit Filters can be purchased through your local dealer Cleaning the Air Filter If dirt is allowed to collect in the air filter the airflow will be reduced leading to reduced performance and increased operation noise Be sure to clean the filters...

Page 13: ...he following details regarding this air conditioner Low Ambient Cooling When the outdoor temperature drops the outdoor unit s fans may switch to Low Speed or one of the fans may stop inter mittently Should the power supply to the air conditioner be inter rupted by a power failure the air conditioner will restart automatically in the previously selected mode once the power is restored AUTO Restart ...

Page 14: ...sensor open Discharge pipe temperature sensor shortcircuited Outdoor high pressure abnormal Discharge pipe temperature abnormal Model abnormal Indoor fan abnormal Outdoor signal abnormal Outdoor EEPROM abnormal Error Code Error Code s t s t Error contents Communication error indoor unit remote controller Communication error indoor unit outdoor unit Room temperature sensor open TROUBLESHOOTING Inst...

Page 15: ... outdoor unit will stop If you wish to warm the room further set the thermostat for a higher setting During Heating operation the unit will temporarily stop opera tion between 2 and 16 minutes as the Automatic Defrosting mode operates During Automatic Defrosting operation DEFROST will be shown on the remote controller display The fan may stop when the unit is monitoring the room s tem perature Dur...

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