Carrier 42XQ Series User manual

42XQ : Cooling only direct expansion Fan Coil Unit (Wireless Control)
42XQA : Cooling only direct expansion Fan Coil Unit (Wired Control)
®
OWNER’S MANUAL
42XQ/XQA
UNDERCEILING
CONSOLE
42XQ 42XQA

Thank you for choosing Carrier!
You can be sure that you’ve made a wise choice, because the same
pride we take in manufacturing the Carrier equipment installed in the
Astrodome in Texas, in the Sistine Chapel, in the Capitol – the seat of
the US Congress – and in thousands of other installations worldwide,
is embodied in the design of the unit you have just purchased.
Oneofthegreatestbenefitstoawaityouwhenusingyourairconditioner
is that, in addition to maintaining a pleasant temperature in the area
where it is installed, the ambient air is also filtered and dehumidified,
thus improving the quality of the air you breathe.
This manual has been created to familiarize you with all of the
technological features and benefits which this air conditioner unit can
offer.
This manual also contains important information regarding the
maintenanceof yournew airconditioner, servicingthe unitand, above
all,runningit inaneconomicalway.Setasidea fewminutestocarefully
read through the contents of this manual and learn to optimize the use
of your new Carrier device in terms of personal comfort and economy
of operation.

CONTENTS
PRECAUTIONS.................................................................................................. 3
Safety considerations 3
DISPLAYS OF THE INDOOR UNIT, LED INDICATORS & CONTROLS............ 6
Error codes 6
Emergency operation 7
REMOTE CONTROL.......................................................................................... 8
Using the selected functions 10
Using the wireless remote control 11
Using the wired remote control 17
Setting the operating mode 19
INFORMATION ABOUT FILTERS.................................................................... 21
CARE AND MAINTENANCE............................................................................ 22
Operating conditions 22
Operation during power outages 22
PRACTICAL TIPS............................................................................................. 23
Cleaning the Indoor Unit 24
Cleaning the Outdoor Unit 24
Cleaning the filters 25

3
PRECAUTIONS
Safety considerations
Theinstallation,servicingandmaintenance
of air conditioning equipment may be
hazardous due to the pressure which the
refrigerant gas exerts on the interior, and
its electrical components. Only specialized
and professionally qualified personnel may
install, repair or perform servicing work on
airconditioningequipment.Non-specialized
people may only perform basic
maintenance work such as: cleaning the
coils and cleaning and/or replacing the
filters.
All other types of maintenance work may
only be performed by specialized
personnel. To perform such work, the
installer must follow the safety standards
applicable, and must wear safety goggles,
clothing and gloves suitable for this
purpose. Appropriate protection must be
used during welding work; a fire
extinguisher must always be kept close to
hand.
For your safety, read these instructions
through carefully and respect all of the
labels marked WARNING below.
WARNING or CAUTION contained in this
manual or attached to the housing of the
unit.
Consult your local regulations applicable
with respect to electrical installations for
special requirements.
Recognize the safety information
The symbol “ ” indicates a safety alert.
When you see this symbol, it is because
there is a potential risk of material damage
orpersonal injury. Understand the meaning
of the words DANGER,WARNING AND
CAUTION. These words are used in
conjunction with the alert symbol.
DANGER means situations with a severe
risk to injury to people, including the risk of
death. The word WARNING means
situations which could result in personal
injury,including death.ThewordCAUTION
indicates unsafe practices which could
result in minor personal injury or material
damage.
• Do not attempt to interconnect units
from different manufacturers without
first consulting your Carrier
representative or an engineer
specializing in air conditioning. The
incompatibility between the indoor
and outdoor unit and its control
devices could cause serious problems
for both units and invalidate the
manufacturers’ warranty coverage.
Carrier accepts no liability and will
cancel the product warranty if these
installation instructions are not
followed as indicated, or if the wiring
is changed. Consult your preferred
Carrier representative for further
details.
WARNING
• Before installing, modifying or performing
servicing work on the system, check
that the electrical power supply to the
unit has been switched off. Check that
there is not more than one power
switch. Check and label each switch
present with the appropriate wording.
Electric shocks can cause personal
injury, and even death. If the power
supply cable is damaged, it must be
replaced only with an authorized
Carrier spare part by its network of
authorized dealers.

4
CAUTION
DISCONNECTING THE UNIT FROM
THE MAIN POWER SUPPLY
These units must be connected to the
main electrical power supply through a
circuit-breaker or switch fuse with an
appropriatecapacityandwithaminimum
separationbetweenthe contacts of 3mm.
Ifthis is not possible, a contact/container
combination equipped with an active
earth wire must be used. The contact
musthave easy access after installation.
The contact must be disconnected from
thereceptacletoensurethat no electrical
power gets to the unit. It is vitally
important to follow the safety standards
in force at the connection location and
also to check that the electrical power
supply is actively equipped with an earth
cable.
WARNING
Do not attempt to disconnect the unit
at the main power switch. Always use
the unit’s control when you want to
disconnect the system.
1) Do not spray flammable aerosols near
to the unit. The unit may be damaged if it
comesintocontactwithgasoline,solvents,
benzene,insecticides or other chemical
substances.
2) To prevent electric shocks, never splash
water into either the indoor or outdoor
units.
3) Donotinsertyourhandsorfingers,orplace
objectsinsidetheairdischargegrilleofthe
outdoor unit, because the fan rotates at
very high speeds, which may cause
serious personal injury.

5
4) Use onlyacircuit-breakerwitha suitable
capacity.
5) Do not obstruct the air discharge of any
of the indoor and outdoor unit. Doing
so, blocks the airflow, reducing the
cooling capacity and causing the unit
to malfunction.
6) Themanufactureracceptsnoliabilityinthe
event of damage caused by: mistakes
or changes when establishing the
electrical connections or refrigerant gas
connections, during installation or due to
the inappropriate use of the equipment.
Failuretoobservetheseinstructionswill
immediately invalidate the warranty of
your unit.
This unit will only operate correctly if it is
installed and tested by personnel
professionally qualified and trained for
such work.
Keep the unit away from heat sources.
High temperatures may cause physical
damage to the unit.
7) Insummer,preventsunlightfromentering
the air-conditioned area as far as
possible. You can do this by using
curtains or blinds on the windows.
8) Use the voltage indicated on the unit’s
dataplate.Using a voltage differentfrom
the specified voltage may cause very
serious damage to the unit.

6
DISPLAYS OF THE INDOOR UNIT,
LED INDICATORS AND CONTROLS
T: EMERGENCY and RESET button
S: Receiver of remote control signal
P: Green LED
R: Yellow LED
Q: Red LED
Indoor Unit LEDs
Informationabouttheoperatingmode of the
indoor unit is given by the 3 LEDs
(light-emitting diodes) on the unit.
THE GREEN LED (P) indicates the
followings:
• Error diagnosis.
• During normal operation, the LED is
illuminated.
NOTE
• When the unit is disconnected or in
Standby mode (waiting), the LED
remains switched off. If a breakdown
occurs, the LED flashes at 5-second
intervals. The error code is shown by
the number of times the LED flashes.
A pause of 5 seconds occurs between
the luminous signal cycles.
ERROR CODE DESCRIPTION
3 Ambient temperature sensor error
4 Indoor unit coil sensor error
7 Outdoor unit error
10 EEPROM malfunction
11 Corrupted serial number
12 Incomplete address/zone information
13 Gas flow distribution error

7
THE RED LED (Q) indicates the following
information
• During normal operation, the LED is
switched off.
• During defrosting, the LED is
illuminated.
• During the testing of the electrical
connections, the LED flashes at 1
second intervals.
THE YELLOW LED (R) indicates that the
unit is operating in timer mode. During this
operating mode, the LED is illuminated. If
timer mode is active and the unit is reset
immediately after a stop, this LED flashes
after receiving a new signal from the unit.
“EMERGENCY button” (T)
This may be used when the remote control
is not working or has been lost.
Emergency Operation
When the unit is in OFF mode
(disconnected) and you press the
emergency button for 5 seconds, the unit
starts operating as follows:
• Automatic mode
• Temperature at 22oC
• Automatic fan speed
• The air deflectors are positioned
automaticallyaccordingtotheoperating
mode – see note
• Timer deactivated during cleaning or
replacement of filter
NOTE
• Positioning of the selector key: the
units leave the factory configured for
the underceiling position.
CONSOLE : Position 1
UNDERCEILING : Position 0
If in doubt, refer the Installation and
Start-up Instructions’ Manual.
NOTE
• Accordingto thesignalreceived viathe
remotecontrol, theunitstartsoperating
according to the command selected.
“RESET” (T)
Thisbuttonmustbepressed for one second
toreverttonormaloperationoftheunitafter
cleaning work or replacing the filter.

8
NOTE
REMOTE CONTROL
The remote control works with 1.5 V
batteries. When the battery icon appears
onthedisplayoftheremotecontrol,it’s time
to replace the old batteries.
Inserting the batteries
• Open the battery compartment on the
back of the remote control. To remove
the small cover, press down the small
tab in the direction indicated by the
arrow in the diagram.
• Removetheoldbatteries and insert new
ones. The remote control requires two
batteries (1.5V type AAA).
• Press the “o” button with a sharp-
pointed object to reset the remote
control.
CAUTION
Beforereplacingthebatteries,thedevice
must be disconnected.
• The average life of the batteries under
normal conditions of use is
approximately one year.
• If the air conditioner does not function
as normal after the remote control
batteries have been replaced, remove
the batteries again, reinsert them and
press the “o” button again after 5
seconds.

9
NOTE
• The maximum distance for the infrared
remote control to work properly is 5
metres.
• There must be no objects, for example,
curtains, obstructing the space
between the unit and the remote
control.
NOTE
• Sunlight shinning directly onto the
signal reception area of the unit may
cause difficulties in receiving the
signal emitted by the remote control.
• The remote control must be pointed
towards the device’s signal reception
area when you press the desired
button.
• The electronic control system emits
an acoustic signal (beep) to confirm
the reception of the emitted
message.
Reading on the display or viewfinder
A. Operating mode selection button
B. ON/OFF button – Connect/
disconnect
C. Button for increasing the selected
temperature
D. Button for reducing the selected
temperature
E. Fan speed selection button
F. Customized control button
G. Customized selections button
H. Deflector control button
I. Button for connecting the timer (ON)
J. Button for the daily timer (DAILY)
K. Buttonfor canceling the timer setting
L. Button for disconnecting the time
(OFF)
M. Button for setting the night operating
mode (SLEEP)
N. Button for setting the time
O. Reset button

10
USING THE SELECTED FUNCTIONS
1. Operating mode (from left to right):
• Ventilation (fan only)
• Cooling with dehumidification
• Dehumidification only
2. Signal transmission symbol
3. Temperature reading
4. “Address” selector
5. Temperature measuring unit (oC or oF)
6. Configuration of the unit
7. Low battery indicator
8. Position of the air deflector
9. Fan speed
10.Active customization
11.Timer ON selected
12.Night timer activated
13.Day timer activated
14.Timer ON, OFF and clock
15.Timer OFF selected

11
NOTE
USING THE WIRELESS REMOTE CONTROL
When the air conditioner is disconnected,
the control display shows only the hour of
the day (if other icons are shown,
disconnect the control by pressing the
“ ” button).
Press the “ ” button to connect the unit.
All of the selected and saved functions light
up; the unit operates according to the
functions selected. Press the “ ” button
to disconnect the air conditioner. All of the
unit’s signals disappear and the control
display shows the current time only. If the
unit does not stop, connect the control (by
pressing the “ ” button) and repeat the
operation.
If the “ ” button is pressed immediately
after the disconnection of the unit, the unit
only starts operating again after 3 to 5
minutes due to the protection against the
frequency cycle of the compressor.
The unit only emits the BEEP acoustic
signal when the orders have been received
correctly.
The operating mode of the air conditioner
can be selected with this button.
By pressing this button repeatedly, the
available operating modes are selected
sequentially. The unit recognizes the signal
received with a confirmation BEEP and the
operating mode selected is indicated as
follows:
Connect / Disconnect
(Key B)
Select the Operating Mode
(Key A)
Indicated symbol
Setting the desired temperature
By pressing the buttons “ ” and “ ” ,
you increase or decrease the desired
ambient temperature. With each touch of
the button, the unit emits the confirmatory
BEEP acoustic signal and the selected
temperature appears on the display.
The selected temperature may be between
17oC (63oF) and 32oC (90oF) at 1-degree
intervals.
Ventilation (fan only)
Cooling with dehumidification
Dehumidification only
<
Increase
(Key C)
Decrease
(Key D)
<
<
<
• In cooling mode, if the temperature
selected is higher than the ambient
temperature, the unit will not start
operating.

12
Selectingthe airflow direction
(Key H)
The airflow direction is adjusted
automatically. The deflector will
remain in the pre-selected position,
according to the operating mode.
6differentairflow directions
may be selected.
The deflector will continue to swing
downwards and upwards. The
“Swing” option guarantees an
effective and uniform distribution of
ambient air at all times.
NOTE
The deflector direction must be set so as
to optimize the ambient airflow distribution.
Press the button until one of the
following positions is displayed:
Icons appearing on the display
• In COOLING, DE-HUMIDIFICATION
andVENTILATIONmodes,thedeflector
swings to the COOLING option.
The fan speed can be selected by pressing
the button with the icon.
Indicated symbol
1.Timer ON button (Button I)
Press this button even if the remote
control is turned off. The relevant icon
and the picture of the clock start
flashing. If you do not press a button
for 10 seconds, the remote control
switches itself off (it was already
switched off when the button was
pressed), or the timer function is
automatically deactivated.
Selecting the fan speed
(Key E)
Low speed
(for night operation)
Medium speed
High speed (from when the unit
is turned on until the desired
temperature is reached)
Automatic (the fan speed
changes automatically to the
valueprovidingthebestpossible
comfort)
Programming the Timer
to start (ON)

13
2.HOUR and MINUTES buttons
( and buttons)
Iftheunitis connected, the onlypossible
selection is the time of starting
operation. The unit operates with the
selections shown on the display.
3.HOUR and MINUTES buttons
( and buttons)
If the unit is disconnected: select the
operating start hour and use the
temperature control buttons ( and
buttons).
First select the hour and then confirm
by pressing the button . Then select
the minutes using the buttons and .
To set the clock permanently, press
button again.
4.Operating mode
Select the operating mode of the unit.
The icons begin to flash. To select the
mode, use the button.After selecting
the mode, press the button. The
icon of the selected mode starts
flashing.
5.Desired temperature
To select the desired temperature (the
value will be flashing), use the or
buttons. Press button to confirm
the selection. The numbers stop
flashing.
6.Fan speed
Selectthefanspeedusingthe button.
After making your selection, press
button to confirm. The icon stops
flashing.
<
<
<
<
<
<
<
<
<
<
7.Positioning the air deflector
This icon now flashes. Use button to
select the desired position.
Press button to confirm. Now all of
the icons are fixed on the display. If you
want to cancel the selections made up
to now, press button X; if you want to
canceltheselections sincethetimer was
set, press button and then button X.
Programming the Time to stop (OFF)
1.TIMER OFF button
(Button L)
Press button .
The timer OFF icon and the hour
selection numbers start flashing.
Thisfunctionmaybeselected even with
the remote control disconnected.
2.HOURandMINUTESselectionbuttons
( and buttons)
To select the clock, press the and .
To toggle between hours and minutes,
press button .
Press button again to confirm.
<
<
<
<

14
NOTE
Customization and
(Button G and F)
If you want to save a customized operating
mode which you can reactive at any time,
complete the following steps:
1. With the remote control connected or
disconnected, press button and keep
it pressed down for more than 5
seconds. The customization icon
starts flashing on the display.
2. Press button to select the operating
mode.
3. Pressbutton and toselectthe desired
temperature.
4. Use button to select the fan speed.
5. Use button to select the deflectors’
position.
6. After entering all the selected options,
press button to save them.
<
<
• After this procedure, all of the selected
and saved functions will be able to be
activated using button , regardless
of the operating mode of the unit.
After entering customized mode, press one
of the buttons: , , , or to exit.
If you want to change one or more saved
settings, return to point 1 and restart the
setting procedure.
<
<
Daily timer
(DAILY - button J)
Press button when timer ON or OFF is
active. The icon appears on the display. In
this way, the saving of the timer ON and
OFF is repeated daily. To deactivate the
daily function, press button again.
Combining the TIMER ON, OFF and
DAILY programming
If you want the unit to start operating at
5:30pm and stop operating at 10:30pm,
proceed as follows:
1. Select timer ON for 5:30pm
2. Select timer OFF for 10:30pm
3. Select the desired operating mode
(button )
If you want to stop the unit at 10:30pm and
restart at 7:30am with the same operating
mode, proceed as follows:
1. Select timer OFF for 10:30pm during
operation
2. Select timer ON for 7:30am

15
Ifyouwant the daily operating mode to start
at 5:30pm and stop at 10:30pm, proceed
as follows:
1. Select timer ON for 5:30pm
2. Select timer OFF for 10:30pm
3. Press the button of the daily operating
mode (Button )
Canceling the ON, OFF and DAILY
TIMER programming
1. If you want to cancel the selection of
ON or OFF timer, press the buttons,
following this sequence:
• Button or
• Button X
To deactivate the daily operating mode
function, press button
NOTE
• Thedailyoperation function willremain
active until one of the two timers (ON or
OFF) is activated.
Programming the night timer
(SLEEP - button )
Press this button to set the night timer
(SLEEP)withtheremote control connected.
The icon appears on the display. This
procedure allows you to set the remaining
operating time of the unit.
1. “1:hr” appears on the display, together
with the icon.
2. Press button .
The display shows
the following
selections in the
sequence:
1hr, 2 hr,3 hr,4hr, 5 hr,
6 hr, 7 hr, 8 hr and 9 hr
3. Once you have selected - using the
buttons or -the remaining operating
hours, press button again to confirm.
4. After the night timer has been set, the
unit will check the selected temperature
to prevent excessive cooling during
operation.
Buttons for setting the time and
resetting
(Button N and O)
Press the clock setting button to adjust
the real time. Press the button “o” with a
sharp-pointed object, if the remote control
is not working properly or after replacing
the batteries.
<
<
<

16
NOTE
Setting the hour
(Button N)
1. With the remote control
connectedordisconnected,
press button .
2. The numbers of the hour
start flashing. Press button
or to set the desired
hour.
Press button to switch to
the minutes, in order to set
them.
3. To make this selection,
always use buttons or .
4. After setting the hour,press
button to confirm.
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<
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<
NOTE
“Address” Selector
• If there are two indoor units in the
same room, you can connect one
remote control to one indoor unit and
the other remote control to the other
unit, or you can control both units
using just one remote control.
• For the configuration, consult the
Installation & Start-up Instruction’s
Manual.
The air conditioner will not work if there are
curtains,doorsorotherobjectsblockingthe
signal sent from the remote control to the
unit.
If the infrared signal receiver of the indoor
unit is directly exposed to the sun’s rays,
the equipment will not function properly.
Block the incidence of sunlight until the
exposure has been eliminated.
Together with the remote control, you will
receive a mounting support to put it inside.
Attached the support to the wall.
CAUTION !!!
• Alwaysusetheremotecontroltosetthe
positionoftheairdeflectors; otherwise
operational anomalies may result.
Disconnect the unit and reconnect it
whenmanuallysettingthegridoutside
of the range.

17
Control to the left and right
If you want to set the direction of the air to
the right or left, adjust the deflector by hand
after opening the horizontal deflector.
NOTE
• DO NOT adjust the deflector by hand
if the unit is operating in SWING
mode, since this may damage the air
oscillation mechanism.
WIRED REMOTE CONTROL
General Information and Specifications
A =Reading on the display
B = Increase temperature / change the air
deflector setting button
C =Decrease temperature / change the
air deflector setting button
D =Fan speed selection button
E =Operating mode selection button
Specifications
•Operating Modes:
Off (disconnected), Cool (cooling),
Dry (dehumidification), and Fan only
(ventilation).
•Fan Speeds: Low, Medium, High and
Auto.
•Deflector temperature: Between 17oC
and 32oC (63oF and 90oF).
•Cancellationof temperaturesensor of
unit: Allows you to use the air sensor
located on the remote control instead
of the sensor located inside the unit.
•Diagnostics:Detectserrorsintheremote
control air sensor.
The code “A1” shown on the display
indicates this anomaly.
“UP” and “DOWN”
buttons
Buttons for increasing or
decreasingthetemperature
or selecting the air
deflector modes “AUTO”
or “SWINGING”.
Operating mode selection
button.
Air deflector or fan
selection button.
MODE
FAN
(up)
(down)
MODE FAN

18
Display the selected functions
1. Disconnected
2. Selected temperature/ambient
temperature
3. Set temperature
4. Deflector operating position
5. Fan speed
6. Cooling
7. Dehumidification only
Control Powered Up
All of the segments of the Remote Control
Display must be powered up for five
seconds. Information about the operating
mode, fan speed, desired temperature and
configuration must be read from the
Microprocessor inside the Remote Control.
If the EEPROM values are not valid, the
following must be used by default.
Example of normal operation
When connected, the control display
appears.
Operating Mode = AUTO
Fan Speed = AUTO
Desired Temperature = 22oC
oF or oC=C
Deflector (louver) = AUTO
Cancellation of the Ambient Thermistor = OFF
Cooling Only = Cool

19
SETTING THE OPERATING MODE
“MODE” button
Pressing the “MODE” button causes the
operating mode to change. The “MODE”
button must be released and then pressed
againtoswitchtothenextmode.The active
mode will always be displayed in normal
operation.
MODE FAN
NOTE
• Ifthe“MODE”buttonisnot pressed for
15 seconds, the next command
always changes the mode to OFF.
The available operating modes to select
from are:
OFF Mode
• OFF mode
• Ambient Temperature: if configured by
canceling the ambient environment
sensor. Otherwise none.
Available Buttons
• “MODE” button
Remote Cooling Only
OFF (disconnected)
COOL (Cooling)
DRY (dehumidification)
FAN ONLY (ventilation)
COOL and DRY modes
• ICON of the Operating Mode.
• Ambient Temperature: if configured by
cancelingthetemperature sensor of the
ambient environment unit (operated by
the environment controller); otherwise
the temperature is selected by the user
with the “SET TEMP” icon.
• FAN/LOUVRE icon with the Fan and
Louversettings–air deflector – selected
by the user.
Available Buttons
• All the Buttons are available.
DRY
Dehumidification Operation
COOL
Cooling Operation