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14

Noise is heard:

Smells:

Mist or steam are
emitted:

Air flow is stops:

Water is produced from
the outdoor unit:

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 occa-
sional. This sound is produced by the Automatic Defrosting op-
eration.

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, 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
misting.

*

During Heating operation, the outdoor unit’s fan may stop, and
steam may be seen rising from the unit. This is due to Automatic
Defrosting operation.

*

When Heating operation is started, fan is temporarily stop, to al-
low internal parts to warm up.

*

During Heating operation, if the room temperature rises above
the thermostat setting, the indoor and the 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.

*

During Heating operation, water may be produced from the out-
door unit due to Automatic Defrosting operation.

12

12

12

12

NORMAL

FUNCTION

Symptom

Doesn’t operate at all:

Poor Cooling (or *Heating)
performance:

See Page

4

CHECK ONCE

MORE

Items to check

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?

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.

Symptom

Problem

See Page

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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