AIR CONDITIONER
CONCEALED CEILING TYPE
OPERATING MANUAL
MODE D’EMPLOI
MANUAL DE FUNCIONAMIENTO
English
FrançaisEspañol
SUMOTUWETH FR
AM
PM
3 6 9
KEEP THIS MANUAL FOR FUTURE REFERENCE
CONSERVEZ CE MODE D’EMPLOI AFIN DE POUVOIR VOUS Y RÉFÉRER ULTÉRIEUREMENT
GUARDE ESTE MANUAL PARA PODERLO CONSULTAR EN EL FUTURO
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FUJITSU GENERAL LIMITED
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P/N9373117063
CONTENTS
SAFETY PRECAUTIONS ................................................. 1
NAME OF PARTS ............................................................ 2
PREPARATORY OPERATION .......................................... 2
OPERATION ..................................................................... 3
ON/OFF TIMER ................................................................ 4
WEEKLY TIMER ............................................................... 5
TEMPERATURE SET BACK TIMER ................................ 7
SELF-DIAGNOSIS ........................................................... 8
OPERATING TIPS ............................................................ 8
CARE AND MAINTENANCE ......................................... 11
TROUBLESHOOTING ................................................... 12
SAFETY PRECAUTIONS
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Before using the appliance, read these “PRECAUTIONS” thoroughly and operate in the correct way.
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The instructions in this section all relate to safety; be sure to maintain safe operating conditions.
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“DANGER”, “WARNING” and “CAUTION” have the following meanings in these instructions:
DANGER!
WARNING!
CAUTION!
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Do not attempt to install this air conditioner by yourself.
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This unit contains no user-serviceable parts. Always consult authorized service personnel for repairs.
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When moving, consult authorized service personnel for disconnection and installation of the unit.
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Do not become over-exposed to cold air by staying in the direct path of the air fl ow of the air conditioner
for extended periods of time.
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Do not insert fi ngers or objects into the outlet port or intake grilles.
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Do not start and stop air conditioner operation by turning off the electrical breaker and so on.
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In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the electrical
breaker, and consult authorized service personnel.
This mark indicates procedures which, if improperly performed, are most likely to
result in the death of or serious injury to the user or service personnel.
This mark indicates procedures which, if improperly performed, might lead to the
death or serious injury of the user.
This mark indicates procedures which, if improperly performed, might possibly
result in personal harm to the user, or damage to property.
DANGER!
CAUTION!
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Provide occasional ventilation during use.
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Do not direct air fl ow at fi replaces or heating apparatus.
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Do not climb on, or place objects on, the air conditioner.
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Do not expose the air conditioner directly to water.
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Do not operate the air conditioner with wet hands.
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Turn off power source when not using the unit for extended periods.
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Always turn off the electrical breaker whenever cleaning the air conditioner or changing the air fi lter.
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Connection valves become hot during Heating; handle with care.
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Check the condition of the installation stand for damage.
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Do not place animals or plants in the direct path of the air fl ow.
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When restarting after a long period of disuse in the winter, turn the power switch on at least 12 hours
before starting the unit.
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Do not drink the water drained from the air conditioner.
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Do not use in applications involving the storage of foods, plants or animals, precision equipment, or
art works.
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Do not apply any heavy pressure to radiator fi ns.
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Operate only with air fi lters installed.
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Do not block or cover the intake grille and outlet port.
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Ensure that any electronic equipment is at least one metre away from either the indoor or outdoor
units.
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Avoid installing the air conditioner near a fi replace or other heating apparatus.
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When installing the indoor and outdoor units, take precautions to prevent access by infants.
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Do not use infl ammable gases near the air conditioner.
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NAME OF PARTS
Display
2
7
8
9
0
q
w
Display panel
*1: If e, r buttons are pressed, the operation lock display fl ashes,
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DAY
CLOCK ADJUST
DAY OFF
SET BACK
DELETE SET
y
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ENERGY
SAVE
d
THERMO
SENSOR
s
t
1
3
4
5
6
e
r
iupo
a
but the air conditioner will not respond.
1 Start/Stop Button
2 Set Temperature Button
3 Master Control Button
4 Fan Control Button
5 THERMO SENSOR Button
ENERGY SAVE Button
6
7 Timer Mode (CLOCK ADJUST) Button
8 DAY (DAY OFF) Button
9 SET BACK Button
0 Set Time Button
q DELETE Button
w SET Button
e Button cannot be operated.
r Button cannot be operated.
*1
*1
t Operation Lamp
y Timer and Clock Display
u Operation Mode Display
i Fan Speed Display
o Operation Lock Display
p Temperature Display
a Defrost Display
s Thermo Sensor Display
d Energy Save Display
PREPARATORY OPERATION
To set the current day and time
Press the DAY button and select the current day.
A appears around the selected day.
1
CLOCK ADJUST
DAY
2
DAY OFF
Press the TIMER MODE button for 2
seconds or more. The time display on
the remote controller will fl ash.
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3
ex. Monday, 10:00 A.M.
Press the SET TIME buttons to set the current time.
Press repeatedly to adjust the current time in 1-minute increments. Press and
hold to adjust the current time in 10-minute increments.
CLOCK ADJUST
Press again to end.
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OPERATION
Instructions related to heating are applicable to “HEAT & COOL MODEL” (Reverse Cycle).
To start/stop operation
Press the START/STOP button.
Operation lamp
Air conditioner ON: Lit brightly
Air conditioner OFF: Not lit
To set the operation mode
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Operation mode setting
Press the MASTER CONTROL button to set the operation mode.
If DRY is selected, the fan speed will be set to AUTO.
AUTO COOL DRY FAN HEAT
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Room temperature setting
Lower Raise
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Fan speed setting
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Energy save setting
ENERGY
SAVE
Press the SET TEMPERATURE buttons to set the room temperature.
Temperature setting range
AUTO ............................................................ 64 to 88 °F
COOL/DRY .................................................... 64 to 88 °F
HEAT ............................................................. 60 to 88 °F*
Press the FAN CONTROL button to set the fan speed.
AUTO HIGH MED LOW
Press the ENERGY SAVE button to start or stop the energysaving air conditioner operation.
For details on th function, refer to page 9.
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OPERATION
Room temperature sensor selection
THERMO
SENSOR
Indoor unit
Press the THERMO SENSOR button to select whether the
room temperature is detected at the indoor unit (remote
sensor) or the remote controller.
When the thermo sensor display appears, the room
temperature is detected at the remote controller.
NOTES
• This function is locked at the factory. In order to detect the room temperature correctly, consult authorized service
personnel when using this function.
• If this function is locked, the location where the room temperature is detected cannot be changed and the
mark fl ashes when the THERMO SENSOR button is pushed.
Part lock function
Press the DAY (DAY OFF) button and SET button
simultaneously for 2 seconds or more to activate the
part lock function and lock all of the buttons on the
remote controller except the Start/Stop button, Set
Temperature buttons, Master Control button, and Fan
Control button. Press the buttons again for 2 seconds
or more to deactivate the part lock function.
When the part lock function is activated, the
mark appears. If any button is pressed during the part
lock, the PL display fl ashes.
CLOCK ADJUST
SET BACK
DELETE SET
DAY OFF
DAY
ON/OFF TIMER
Instructions related to heating are applicable to “HEAT & COOL MODEL” (Reverse Cycle).
To set the ON/OFF timer
Press the TIMER MODE button
1
l
CLOCK ADJUST
No display
NON
STOP
To cancel the timer mode
DELETE
to select the ON TIMER or OFF
TIMER.
OFF
TIMER
• Press the DELETE button to cancel the timer mode.
• The timer mode can also be canceled by changing the timer mode using the TIMER MODE
button.
ON
TIMER
WEEKLY
TIMER
2
From 1 to 24 hours
Press the SET TIME buttons to set the time.
After the time is set, the timer will start automatically.
The amount of time until the OFF timer operates that
is displayed on the timer display decreases as time
passes.
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ex. OFF timer set for 6 hours
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WEEKLY TIMER
Instructions related to heating are applicable to “HEAT & COOL MODEL” (Reverse Cycle).
To set the WEEKLY timer
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1
Press the TIMER MODE button to select the weekly timer. Press the SET button for 2 seconds
3
Press the DAY button to select the day of the week, and then press the
SET button to confi rm the setting.
* For ALL, all of the days can be set together when a appears around
4
Press the SET TIME buttons to set the ON time in 30-minute increments, then press the SET button to proceed to the
OFF time setting. Set the OFF time in the same way.
If necessary, set the second weekly timer settings in the same way.
CLOCK ADJUST
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Day of the week setting
DAY
DAY OFF
1
each day.
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Time setting
ON-1 OFF-1 ON-2 OFF-2
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SET
2
SET
1
2
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ALL
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2
or more.
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When the operating time is set, the
mark appears.
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ex. The timer is set for 7:00 A.M.–6:00 P.M.
(7:00–18:00)
SET
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12 15 18 21
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12 15 18 21
SET
56
Repeat steps 3 and 4 to
set the weekly timer for
another day of the week.
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Press the SET button for 2
seconds or more to complete the weekly timer settings.
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To delete the operating time
DELETE
If the DELETE button is pressed during steps
operating time for the selected day will be deleted.
If all the days are selected, the operating times for all of the
days will be deleted.
3 or 4, the
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WEEKLY TIMER
To start/cancel the WEEKLY timer operation
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To start
CLOCK ADJUST
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To cancel
DELETE
When the weekly timer is selected, the
timer starts automatically.
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ex. Operating time 7:00 A.M.
–6:00 P.M. (7:00–18:00)
The operating time for the current
day is displayed.
NOTES
(1) PRECAUTIONS DURING WEEKLY TIMER SETUP
Setup is not possible in the following cases, so amend
the time.
• Be sure to set the ON time fi rst, then the OFF time.
If either the ON time or the OFF time is not set
correctly, the timer will not operate properly.
• The WEEKLY 2 settings cannot be set earlier than
the WEEKLY 1 settings.
• The WEEKLY 1 and WEEKLY 2 time spans cannot
overlap.
To set the DAY OFF (for a holiday)
SET
1
During the weekly timer,
press the SET button for
2 seconds or more to set
the day.
2
Select the day to set the
DAY OFF.
DAY
DAY OFF
12 15 18 21
(2) The earliest OFF time you can set is 30 minutes after
the ON time.
(3) The OFF time can be carried over to the next day.
(4) Even if the timer operation is set, the timer indicator
lamp of the indoor unit does not light up. (The timer
indicator lamp is used for wireless remote controllers
only.)
3
DAY OFF
Press the DAY (DAY OFF)
button for 2 seconds or
more to set the DAY OFF.
• Press the DELETE button to
cancel the timer mode.
• The timer mode can also be
canceled by changing the timer
mode using the TIMER MODE
button.
DAY
4
Press the SET button for 2
seconds or more to complete
the DAY OFF setting.
SET
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mark: Indicates the DAY OFF
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To cancel
369
12 15 18 21
ex. The DAY OFF is set for Monday.
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12 15 18 21
Follow the same procedures as
those for setup.
NOTES
(1) The DAY OFF setting is only available for days for which weekly settings already exist.
(2) If the operating time carries over to the next day (during a next day setting), the effective DAY OFF range will be
set as shown below.
l
Normal
DAY OFF
ON OFF ON OFF
WEEKLY WEEKLY
Preceding day Setting day Next day
(3) The DAY OFF setting can only be set one time. The DAY OFF setting is cancelled automatically after the set day
has passed.
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Next day setting
ON OFF ON OFF
WEEKLY
Preceding day Setting day Next day
DAY OFF
WEEKLY
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TEMPERATURE SET BACK TIMER
Instructions related to heating are applicable to “HEAT & COOL MODEL” (Reverse Cycle).
To set the temperature SET BACK timer
SET BACK
1
Press the SET BACK button to change to the SET BACK confi rmation display.
The SET BACK operating time and the set temperature will be displayed.
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Day setting
3
DAY
DAY OFF
1
Follow steps
for the weekly timer.
3 and 4 in “To set the WEEKLY timer” (p. 6). The DELETE button is also used as described in the procedures
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Temperature setting
4
SET BACK
temperature
Normal
temperature
ON OFF
76°F
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SET
2
84°F
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Operating time setting
3
Press the SET TEMPERATURE buttons to
set the temperature (from 48 °F to 88 °F).
ex. Operating time 3:00–10:00 P.M.
76°F
SET
4
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12 15 18 21
(15:00–22:00)
If there is no existing
SET BACK temperature setting, “- -” will
be displayed for the
temperature.
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SET
2
Press the SET button for 2
seconds or more.
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ex. When setting all days together
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12 15 18 21
SET
5
Repeat steps 3 and 4.
Press the SET button for 2
seconds or more to complete the temperature SET
BACK timer settings.
To start/cancel the temperature SET BACK timer operation
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To start
SET BACK
Press the SET BACK button. The SET BACK confi rmation
display appears for 5 seconds, and then the timer starts
automatically.
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ex. Display during SET BACK timer operation
(The operating time will not be displayed.)
SA
l
To cancel
SET BACK
1
Press the SET BACK button, and then press the DELETE
button while the SET BACK confi rmation display is dis-
played. Even if the SET BACK button is pressed again, the
SET BACK timer will be cancelled.
DELETE
2
NOTES
(1) The SET BACK timer only changes the set temperature, it cannot be used to start or stop air conditioner
operation.
(2) The SET BACK timer can be set to operate up to two times per day but only one temperature setting can be
used.
(3) The SET BACK timer can be used together with the ON, OFF, and weekly timer functions.
(4) The SET BACK operating time is displayed only in the SET BACK confi rmation display. (Refer to step 1 for the SET
BACK confi rmation display.)
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SELF-DIAGNOSIS
When the error indication “E:EE” is displayed, inspection of the air conditioning system is necessary. Please consult
authorized service personnel.
(1) Stop the air conditioner operation.
(2)
SUMOTU
WE
TH FR
Press the SET TEMPERATURE buttons
(3) Press the SET TEMPERATURE buttons simultaneously for 5 seconds or more to stop the self-diagnosis.
/ simultaneously for 5 seconds or more to start the self-diagnosis.
Faulty unit number
(remote controller address)
SA
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ex. Self-diagnosis checkex. Error display
Error code
SA
OPERATING TIPS
Instructions relating to heating are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
Mode operation: AUTO
COOLING MODEL
• When the room temperature is 4 °F higher than the set
temperature, the mode will switch between Cooling and
Drying.
• During the Drying mode operation, the FAN setting should
be switched to LOW for a gently cooling effect during
which the fan may temporarily stop rotating.
HEAT & COOL MODEL (Reverse Cycle)
Auto changeover function
• When AUTO CHANGEOVER is selected, the air conditioner
selects the appropriate operation mode (Cooling or
Heating) according to your room’s present temperature.
• When AUTO CHANGEOVER is fi rst selected, the fan will
stop or operate at a very low speed for about 1 minute
while the unit determines the current conditions of the
room and selects the proper operation mode.
• When the room temperature is near the thermostat
setting, the air conditioner will begin monitor operation.
In the monitor operation mode, the fan will stop or operate
at a very low speed. If the room temperature subsequently
changes, the air conditioner will once again select the
appropriate operation (Heating or Cooling) to adjust
the temperature to the value set in the thermostat. (The
monitor operation range is ±4 °F relative to the thermostat
setting.)
Fan speed: AUTO
Heating: The fan will stop or operate at a very low speed
if the temperature of the airfl ow from the indoor
unit is lower than the set temperature.
Cooling: As the room temperature approaches that of the
set temperature, the fan speed becomes slower.
Fan: The fan alternately turns on and off; when on, the
fan runs at the low fan speed.
AUTO restart
• Should the power supply to the air conditioner be
interrupted by a power failure, the air conditioner will
restart automatically in the previously selected mode
once the power is restored.
• 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.
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 performance is being produced, we
recommend you use this air conditioner in conjunction
with another kind 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.
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OPERATING TIPS
Energy save
• The energy conservation mode (ENERGY SAVE) raises the
set temperature slightly in the cooling mode and lowers
the set temperature in the heating mode to economically
control the operation of the unit.
• If you press the ENERGY SAVE button while the unit is
in the timer mode, the unit will go into the conservation
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 not
change if the energy save mode is used.
During cooling operation
When the ENERGY SAVE is
pressed, the thermostat setting
is automatically raised 2 °F every
60 minutes, until the thermostat
is raised a total of 4 °F.
During heating operation
When the ENERGY SAVE is
pressed, the thermostat setting
is automatically lowered 2 °F
every 30 minutes, until the
thermostat is lowered a total
of 8 °F.
82
F
F
80
F
78
Energy save
74
F
72
F
F
70
30 min.
F
68
66
F
Energy save
60 min.
30 min.
30 min.
Hot start (for heating)
The indoor unit prevents cold drafts when heating operation
begins.
The indoor unit fan will not operate or it will operate at a
very low speed until the heat exchanger reaches the set
temperature.
Defrosting (for heating)
When the outdoor temperature is low and the humidity
high, frost will collect on the outdoor 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 will be displayed on the remote
controller. It will take anywhere from 4 to 15 minutes before
the air conditioner starts up again.
Group Control
One remote controller can control up to 16 air conditioners.
All of the air conditioners will be operated with the same
settings.
Dual Remote Controllers (optional)
An additional remove controller can be added up to
the maximum of two remote controllers. Either remote
controller can control the air conditioner. However, the timer
functions cannot be used at the slave unit.
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OPERATING TIPS
Multi-type Air conditioner
This indoor unit can be connected to a multi-type outdoor unit. The multi-type air conditioner allows multiple indoor units
to be operated in multiple locations. The indoor units may be operated simultaneously, in accordance with their respective
output.
Simultaneous Use of Multiple Units
Instructions relating to inverter (v) are applicable only to “INVERTER MODEL”.
v
l When using a multi-type air conditioner, the multiple
indoor units can be operated simultaneously, but when
two or more indoor units of the same group are operated
simultaneously, the heating and cooling effi ciency will
be less than when a single indoor unit is used alone.
Accordingly, when you wish to use more than one indoor
unit for cooling at the same time, the use should be
concentrated at night and other times when less output
is required. In the same way, when multiple units are
used simultaneously for heating, it is recommended that
they be used in conjunction with other auxiliary space
heaters, as required.
l Seasonal and outdoor temperature conditions, the
structure of the rooms and the number of persons present
may also result in differences of operating effi ciency.
We recommend that you try various operating patterns
in order to confi rm the level of heating and cooling
output provided by your units, and use the units in the
way that best matches your family’s lifestyle.
l lf you discover that one or more units delivers a low level
of cooling or heating during simultaneous operation, we
recommend that you stop simultaneous operation of the
multiple units.
v
l Operation cannot be done in the following different
operating modes.
If the indoor unit is instructed to do an operating mode
that it cannot perform, will be shown on the remote
controller display and the unit will go into the standby
mode.
Heating mode and cooling mode (or dry mode)
Heating mode and fan mode
l Operation can be done in the following different
operating modes.
Cooling mode and dry mode
Cooling mode and fan mode
Dry mode and fan mode
v
l The operating mode (heating mode or cooling (dry) mode)
of the outdoor unit will be determined by the operating
mode of the indoor unit that was operated fi rst.
If the indoor unit was started in fan mode, the operating
mode of the outdoor unit will not be determined.
For example, if indoor unit (A) was started in fan mode
and then indoor unit (B) was then operated in heating
mode, indoor unit (A) would temporarily start operation
in fan mode but when indoor unit (B) started operating
in heating mode, will be shown on the remote
controller display and it would go into standby mode.
Indoor unit (B) would continue to operate in heating
mode.
Notice
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
l During use of the heating mode, the outdoor unit will
*
occasionally commence the defrost operation for brief
periods. During the defrosting operation, if the user sets
the indoor unit for heating again, the defrosting mode
will continue, and the heating operation will begin after
completion of defrosting, with the result that some time
may be required before warm air is emitted.
l During use of the heating mode, the top of the indoor
*
unit may become warm, but this is due to the fact that
coolant is circulated through the indoor unit even when
it is stopped; it is not a malfunction.
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CARE AND MAINTENANCE
CAUTION!
Before cleaning the unit, be sure to stop the unit and power supply. (Turn off the electrical breaker)
Cleaning the air fi lter
If dirt is allowed to collect in the air fi lter, the airfl ow will be reduced, leading to reduced performance, and increased
operation noise. Be sure to clean the fi lters regularly.
How to cleaning
Use a vacuum cleaner to remove dust and dirt from the air fi lter, or wash in a synthetic detergent. After washing, dry in a
shaded place, then reinstall.
l When used for extended periods, the unit may accumulate dirt inside, reducing its performance. We recommend that
the unit be inspected regularly, in addition to your own cleaning and care. For more information, consult authorized
service personnel.
l When cleaning the unit’s body, do not use water hotter than 104 °F, harsh abrasive cleansers, or volatile agents like
benzene or thinner.
l Do not expose the unit body to liquid insecticides or hairspray.
l If the unit will not be operated for a period of one month or more, be sure to allow the inner parts of the unit to dry
thoroughly, in advance, by operating the unit in fan mode for half a day.
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TROUBLESHOOTING
Instructions relating to heating are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
WARNING!
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:
Symptom Problem See Page
NORMAL
FUNCTION
Doesn’t operate immediately:
Noise is heard:
Smells:
Mist or steam are
emitted:
Air fl ow is stopped:
Water is produced from
the outdoor unit:
thermo sensor
display on the remote
controller is fl ashing:
l If the unit is stopped and then immediately started again, the
compressor will not operate for about 3 minutes, in order to prevent
fuse blowouts.
l 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.
l 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).
l During Heating operation, a sizzling sound may be heard
occasionally.
This sound is produced by the Automatic Defrosting operation.
l 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.
l 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.
l During Heating operation, the outdoor unit’s fan may stop, and
steam may be seen rising from the unit. This is due to the Automatic
Defrosting operation.
l When Heating operation starts, the fan will not operate or it will
operate at a very low speed to allow the internal parts to warm
up.
l 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 to a higher
setting.
l During Heating operation, the unit will temporarily stop operation
(between 7 and 15 minutes) as the Automatic Defrosting mode
operates. During the Automatic Defrosting operation, will be
shown on the remote controller display.
l The fan may stop or operate at a very low speed when the unit is
monitoring the room’s temperature.
l In case of Multi-type unit, if multiple units are operated in different
operation modes as shown below, the units operated afterward
will stop and will be shown on the remote controller display
of the stopped indoor units.
Heating mode and cooling mode (or dry mode)
Heating mode and fan mode
l During Heating operation, water may be produced from the outdoor
unit due to the Automatic Defrosting operation.
l The room temperature sensor may be malfunctioning. Please
consult authorized service personnel.
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9
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9
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9
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10
9
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TROUBLESHOOTING
Symptom Items to check See Page
CHECK ONCE
MORE
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.
Doesn’t operate at all:
Poor Cooling (or Heating)
performance:
l Has there been a power failure?
l Has a fuse blown out, or a circuit breaker been tripped?
l Is the timer operating?
l Is the air fi lter dirty?
l Are the air conditioner’s intake grille or outlet port blocked?
l Did you adjust the room temperature settings (thermostat)
correctly?
l Is there a window or door open?
l In the case of Cooling operation, is a window allowing bright
sunlight to enter? (Close the curtains.)
l In the case of Cooling operation, are there heating apparatus
and computers inside the room, or are there too many people
in the room?
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5 to 7
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