Fujitsu Air Conditioner fujitsu air conditioner concealed ceiling type User Manual

OPERATING MANUAL  
MODE D’EMPLOI  
MANUAL DE FUNCIONAMIENTO  
AIR CONDITIONER  
CONCEALED CEILING TYPE  
SE S
PM  
3
6
9
12 15 18 21  
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  
P/N9373117063  
FUJITSU GENERAL LIMITED  
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NAME OF PARTS  
1 Start/Stop Button  
Display  
2 Set Temperature Button  
3 Master Control Button  
4 Fan Control Button  
5 THERMO SENSOR Button  
6 ENERGY SAVE Button  
7 Timer Mode (CLOCK ADJUST) Button  
8 DAY (DAY OFF) Button  
9 SET BACK Button  
SU MO TU WE TH FR SA  
3
6
9
12 15 18 21  
t
1
2
7
DAY  
3
4
5
6
CLOCK ADJUST  
SET BACK  
DAY OFF  
ENERGY  
SAVE  
THERMO  
SENSOR  
8
9
DELETE  
SET  
0
0 Set Time Button  
q DELETE Button  
w SET Button  
q
w
e
r
e Button cannot be operated. *1  
r Button cannot be operated. *1  
t Operation Lamp  
Display panel  
y
o p i  
u
SU MO TU WE TH FR SA  
y Timer and Clock Display  
u Operation Mode Display  
i Fan Speed Display  
o Operation Lock Display  
p Temperature Display  
a Defrost Display  
3
6
9
12 15 18 21  
a
d
s
s Thermo Sensor Display  
d Energy Save Display  
*1: If e, r buttons are pressed, the operation lock display flashes,  
but the air conditioner will not respond.  
PREPARATORY OPERATION  
To set the current day and time  
Press the DAY button and select the current day.  
appears around the selected day.  
DAY  
A
1
2
CLOCK ADJU
DAY OF
Press the TIMER MODE button for 2  
seconds or more. The time display on  
the remote controller will flash.  
SU  
MO  
TU  
WE  
TH  
FR  
SA  
SU MO TU WE TH FR SA  
3
CLOCK ADJU
ex. Monday, 10:00 A.M.  
Press again to end.  
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.  
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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  
Press the MASTER CONTROL button to set the operation mode.  
If DRY is selected, the fan speed will be set to AUTO.  
Operation mode setting  
AUTO  
COOL  
DRY  
FAN  
HEAT  
Press the SET TEMPERATURE buttons to set the room temperature.  
Room temperature setting  
Temperature setting range  
AUTO ............................................................ 64 to 88 °F  
COOL/DRY .................................................... 64 to 88 °F  
HEAT ............................................................. 60 to 88 °F*  
Lower  
Raise  
Press the FAN CONTROL button to set the fan speed.  
Fan speed setting  
AUTO  
HIGH  
MED  
LOW  
Press the ENERGY SAVE button to start or stop the energy-  
saving air conditioner operation.  
For details on th function, refer to page 9.  
Energy save setting  
ENERGY  
SAVE  
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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 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.  
DAY  
CLOCK ADJUST  
SET BACK  
DAY OF
SET  
DELETE  
When the part lock function is activated, the  
mark appears. If any button is pressed during the part  
lock, the PL display ashes.  
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  
to select the ON TIMER or OFF  
TIMER.  
SU MO TU WE TH FR SA  
1
2
CLOCK ADJUS
From 1 to 24 hours  
ex. OFF timer set for 6 hours  
No display  
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.  
NON  
STOP  
OFF  
TIMER  
ON  
TIMER  
WEEKLY  
TIMER  
To cancel the timer mode  
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.  
DELETE  
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WEEKLY TIMER  
Instructions related to heating are applicable to HEAT & COOL MODEL(Reverse Cycle).  
To set the WEEKLY timer  
SET  
SU MO TU WE TH FR SA  
1
2
CLOCK ADJUS
3
6
9
12 15 18 21  
Press the TIMER MODE button to select the weekly timer.  
Press the SET button for 2 seconds  
or more.  
Day of the week setting  
3
ALL  
SU  
MO  
TU  
WE  
TH  
FR  
SA  
SET  
DAY  
DAY OF
2
1
SU MO TU WE TH FR SA  
Press the DAY button to select the day of the week, and then press the  
SET button to conrm the setting.  
3
6
9
12 15 18 21  
*
For ALL, all of the days can be set together when a  
each day.  
appears around  
Time setting  
When the operating time is set, the  
mark appears.  
4
SET  
SU MO TU WE TH FR SA  
2
1
ON-1  
OFF-1  
ON-2  
OFF-2  
3
6
9
12 15 18 21  
ex. The timer is set for 7:00 A.M.6:00 P.M.  
(7:0018:00)  
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.  
To delete the operating time  
SET  
DELETE  
5
6
Repeat steps 3 and 4 to Press the SET button for 2 If the DELETE button is pressed during steps 3 or 4, the  
set the weekly timer for seconds or more to com- operating time for the selected day will be deleted.  
another day of the week. plete the weekly timer set- If all the days are selected, the operating times for all of the  
tings.  
days will be deleted.  
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WEEKLY TIMER  
To start/cancel the WEEKLY timer operation  
To start  
To cancel  
SU MO TU WE TH FR SA  
DELETE  
3
6
9
12 15 18 21  
CLOCK ADJUS
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.  
When the weekly timer is selected, the  
timer starts automatically.  
3
6
9
12 15 18 21  
ex.Operating time 7:00 A.M.  
6:00 P.M. (7:0018:00)  
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.  
(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  
Be sure to set the ON time 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.  
only.)  
The WEEKLY 1 and WEEKLY 2 time spans cannot  
overlap.  
To set the DAY OFF (for a holiday)  
DAY  
DAY  
SET  
SET  
1
2
3
4
DAY OF
DAY OF
During the weekly timer, Select the day to set the Press the DAY (DAY OFF) Press the SET button for 2  
press the SET button for DAY OFF.  
2 seconds or more to set  
the day.  
button for 2 seconds or secondsormoretocomplete  
more to set the DAY OFF. the DAY OFF setting.  
SU MO TU WE TH FR SA  
SU MO TU WE TH FR SA  
mark: Indicates the DAY OFF  
To cancel  
3
6
9
12 15 18 21  
3
6
9
12 15 18 21  
Follow the same procedures as  
those for setup.  
ex. The DAY OFF is set for Monday.  
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.  
Normal  
Next day setting  
DAY OFF  
DAY OFF  
ON  
ON  
OFF  
WEEKLY  
Preceding day  
ON  
WEEKLY  
Setting day  
OFF  
ON  
OFF  
OFF  
WEEKLY  
WEEKLY  
Next day  
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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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  
SET  
SU MO TU WE TH FR SA  
If there is no existing  
SET BACK tempera-  
ture setting, - -will  
be displayed for the  
temperature.  
1
2
3
6
9
12 15 18 21  
Press the SET BACK button to change to the SET BACK conrmation display.  
The SET BACK operating time and the set temperature will be displayed.  
Press the SET button for 2  
seconds or more.  
Day setting  
Operating time setting  
SU MO TU WE TH FR SA  
3
SET  
SET  
DAY  
3
6
9
12 15 18 21  
DAY OF
ex. When setting all days together  
4
2
1
3
Follow steps 3and 4in To set the WEEKLY timer(p. 6). The DELETE button is also used as described in the procedures  
for the weekly timer.  
SET  
Press the SET TEMPERATURE buttons to  
set the temperature (from 48 °F to 88 °F).  
Temperature setting  
4
5
SU MO TU WE TH FR SA  
3
6
9
12 15 18 21  
Repeat steps 3 and 4.  
Press the SET button for 2  
seconds or more to com-  
plete the temperature SET  
BACK timer settings.  
ex. Operating time 3:0010:00 P.M.  
(15:0022:00)  
SET BACK  
temperature  
ON 84°F OFF  
76°F  
76°F  
Normal  
temperature  
To start/cancel the temperature SET BACK timer operation  
To start  
To cancel  
SU MO TU WE TH FR SA  
SET BACK  
DELETE  
SET BACK  
2
1
ex. Display during SET BACK timer operation  
(The operating time will not be displayed.)  
Press the SET BACK button, and then press the DELETE  
Press the SET BACK button. The SET BACK conrmation  
button while the SET BACK conrmation display is dis-  
display appears for 5 seconds, and then the timer starts played. Even if the SET BACK button is pressed again, the  
automatically.  
SET BACK timer will be cancelled.  
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 conrmation display. (Refer to step 1 for the SET  
BACK conrmation display.)  
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SELF-DIAGNOSIS  
When the error indication E:EEis displayed, inspection of the air conditioning system is necessary. Please consult  
authorized service personnel.  
(1) Stop the air conditioner operation.  
(2)  
Faulty unit number  
(remote controller address)  
Error code  
SU MO TU WE TH FR SA  
SU MO TU WE TH FR SA  
ex. Error display  
ex. Self-diagnosis check  
Press the SET TEMPERATURE buttons  
simultaneously for 5 seconds or more to start the self-diagnosis.  
/
(3) Press the SET TEMPERATURE buttons simultaneously for 5 seconds or more to stop the self-diagnosis.  
OPERATING TIPS  
Instructions relating to heating are applicable only to HEAT & COOL MODEL(Reverse Cycle).  
Mode operation: AUTO  
AUTO restart  
COOLING MODEL  
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.  
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.  
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.  
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 rooms present temperature.  
When AUTO CHANGEOVER is 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.)  
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  
insufcient 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 rst starting the  
air conditioner until the room is heated.  
Fan speed: AUTO  
Heating: The fan will stop or operate at a very low speed  
if the temperature of the airow 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.  
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OPERATING TIPS  
Energy save  
Hot start (for heating)  
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.  
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  
efciency.  
When this happens, the computer will automatically start  
the defrost cycle. During the defrost cycle, the indoor fan  
During cooling operation  
When the ENERGY SAVE is  
pressed, the thermostat setting  
is automatically raised 2 °F every  
82 F  
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.  
80 F  
60 min.  
60 minutes, until the thermostat  
78 F  
is raised a total of 4 °F.  
Group Control  
Energy save  
One remote controller can control up to 16 air conditioners.  
All of the air conditioners will be operated with the same  
settings.  
During heating operation  
When the ENERGY SAVE is  
pressed, the thermostat setting  
74 F  
72 F  
70 F  
30 min.  
is automatically lowered 2 °F  
68 F  
Dual Remote Controllers (optional)  
every 30 minutes, until the  
thermostat is lowered a total  
of 8 °F.  
30 min.  
66 F  
30 min.  
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.  
Energy save  
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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
lOperation can be done in the following different  
operating modes.  
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 efciency 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.  
Seasonal and outdoor temperature conditions, the  
structure of the rooms and the number of persons present  
may also result in differences of operating efciency.  
We recommend that you try various operating patterns  
in order to conrm the level of heating and cooling  
output provided by your units, and use the units in the  
way that best matches your familys lifestyle.  
Cooling mode and dry mode  
Cooling mode and fan mode  
Dry mode and fan mode  
v
lThe 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 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  
l
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.  
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
lOperation 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  
Notice  
Instructions relating to heating (*) are applicable only to HEAT & COOL MODEL(Reverse Cycle).  
*lDuring 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.  
*lDuring 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 lter  
If dirt is allowed to collect in the air lter, the airow will be reduced, leading to reduced performance, and increased  
operation noise. Be sure to clean the lters regularly.  
How to cleaning  
Use a vacuum cleaner to remove dust and dirt from the air lter, or wash in a synthetic detergent. After washing, dry in a  
shaded place, then reinstall.  
lWhen 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.  
lWhen cleaning the units body, do not use water hotter than 104 °F, harsh abrasive cleansers, or volatile agents like  
benzene or thinner.  
lDo not expose the unit body to liquid insecticides or hairspray.  
lIf 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 units 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 Doesnt operate imme-  
FUNCTION diately:  
l
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.  
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.  
Noise is heard:  
l
During operation and immediately after stopping the unit, the sound  
of water owing in the air conditioners piping may be heard. Also,  
noise may be particularly noticeable for about 2 to 3 minutes after  
starting operation (sound of coolant owing).  
l
l
l
During Heating operation, a sizzling sound may be heard  
occasionally.  
This sound is produced by the Automatic Defrosting operation.  
9
Smells:  
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.  
Mist or steam are  
emitted:  
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 units fan may stop, and  
steam may be seen rising from the unit. This is due to the Automatic  
Defrosting operation.  
9
Air ow is stopped:  
l
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.  
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  
9
operates. During the Automatic Defrosting operation,  
shown on the remote controller display.  
will be  
l
l
The fan may stop or operate at a very low speed when the unit is  
monitoring the rooms temperature.  
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  
of the stopped indoor units.  
will be shown on the remote controller display  
10  
Heating mode and cooling mode (or dry mode)  
Heating mode and fan mode  
Water is produced from  
the outdoor unit:  
l
l
During Heating operation, water may be produced from the outdoor  
unit due to the Automatic Defrosting operation.  
9
The room temperature sensor may be malfunctioning. Please  
consult authorized service personnel.  
thermo sensor  
display on the remote  
controller is ashing:  
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TROUBLESHOOTING  
Symptom  
Items to check  
Has there been a power failure?  
See Page  
CHECK ONCE Doesnt operate at all:  
l
l
MORE  
Has a fuse blown out, or a circuit breaker been tripped?  
l
Is the timer operating?  
5 to 7  
Poor Cooling (or Heating)  
performance:  
l
l
l
Is the air lter dirty?  
Are the air conditioners intake grille or outlet port blocked?  
Did you adjust the room temperature settings (thermostat)  
correctly?  
l
l
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?  
l
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.  
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