Carrier 42XQA Series User manual

42XQ 42XQA
42XQ : Cooling only direct expansion Fan Coil Unit (Wireless Control)
42XQA : Cooling only direct expansion Fan Coil Unit (Wired Control)

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.
One of the greatest benefits to await you when using your air
conditioner 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
maintenance of your new air conditioner, servicing the unit
and, above all, running it in an economical way. Set aside a
few minutes to carefully 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
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

PRECAUTIONS
PRECAUTIONS
Safety considerations
The installation, servicing and maintenance
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
air conditioning equipment. 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 or personal 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. The word
CAUTION indicates unsafe practices
which could result in minor personal injury
or material damage.
!
WARNING!
• 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.
• 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.
3

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 appropriate capacity and with a
minimum separation between the
contacts of 3mm. If this is not
possible, a contact/container
combination equipped with an active
earth wire must be used. The contact
must have easy access after
installation. The contact must be
disconnected from the receptacle to
ensure that 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
CAUTION !
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.
Do not spray flammable aerosols near to
the unit. The unit may be damaged if it
comes into contact with gasoline, solvents,
benzene, insecticides or other chemical
substances.
To prevent electric shocks, never splash
water into either the indoor or outdoor
units.
Do not insert your hands or fingers, or
place objects inside the air discharge grille
of the outdoor unit, because the fan
rotates at very high speeds, which may
cause serious personal injury.
4

Use only a circuit-breaker with a suitable
capacity.
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.
The manufacturer accepts no liability in the
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. Failure to observe
these instructions will 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.
In summer, prevent sunlight from entering the
air-conditioned area as far as possible. You
can do this by using curtains or blinds on the
windows.
Use the voltage indicated on the unit’s data
plate. Using a voltage different from the
specified voltage may cause very serious
damage to the unit.
5

DISPLAYS OF THE INDOOR UNIT,
DISPLAYS OF THE INDOOR UNIT,
LED INDICATORS AND CONTROLS
LED INDICATORS AND CONTROLS
T: EMERGENCY and RESET button
S: Receiver of remote control signal
P: Green LED
R: Yellow LED
Q:RedLED
Indoor Unit LEDs
Information about the operating mode of the
indoor unit is given by the 3 LEDs (light-
emitting diodes) on the unit.
0 THE GREEN LEAD (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
6

0 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.
0 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 22°C
•Automatic fan speed
•The air deflectors are positioned
automatically according to the operating
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
Operation Manual.
NOTE
According to the signal received via the
remote control, the unit starts operating
according to the command selected.
“RESET” (T)
This button must be pressed for one
second to revert to normal operation of the
unit after cleaning work or replacing the
filter.
7

REMOTE CONTROL
REMOTE CONTROL
The remote control works with 1.5 V
batteries. When the battery icon appears on
the display of the remote control, 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.
•Remove the old batteries 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 !
Before replacing the batteries, the
device must be disconnected.
NOTE
• 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
8

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. Button for 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
9

USING THE SELECTED FUNCTIONS
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 (°C or °F)
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
10

USING THE WIRELESS REMOTE CONTROL
USING THE WIRELESS REMOTE CONTROL
Connect / Disconnect
(Key B)
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.
Select the Operating Mode
(Key A)
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:
Indicated symbol
Ventilation (fan only)
Cooling with dehumidification
Dehumidification only
Setting the desired temperature
Increase
(Key C)
Decrease
(Key D)
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
17°C (63°F) and 32°C (90°F) at 1-degree
intervals.
NOTE
In cooling mode, if the temperature
selected is higher than the ambient
temperature, the unit will not start
operating.
11

Selecting the airflow direction
(Key H)
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
The airflow direction is adjusted
automatically. The deflector will
remain in the pre-selected position,
according to the operating mode.
6 different airflow 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
In COOLING, DE-HUMIDIFICATION and
VENTILATION modes, the deflector
swings to the COOLING option.
Selecting the fan speed
(Key E)
The fan speed can be selected by pressing
the button with the icon
Indicated symbol
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
value providing the best possible
comfort)
Programming the Timer
to start (ON)
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.
12
Cooling with dehumidification

2. HOUR and MINUTES buttons
( ∧and ∨buttons)
If the unit is connected, the only possible
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 Mbutton.
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
Select the fan speed using the 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 cancel the
selections since the timer 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.
This function may be selected even with
the remote control disconnected.
2. HOUR and MINUTES selection buttons
( ∧and ∨buttons)
To select the clock, press the ∧and ∨.
To toggle between hours and minutes,
press button .
Press button again to confirm.
13

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 Mto select the operating
mode.
3. Press button ∧and ∨to select the 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.
NOTE
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: M, , ∧, ∨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 M)
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.
14

If you want the daily operating mode to start at
530pm 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
The daily operation function will remain
active until one of the two timers (ON or
OFF) is activated.
Programming the night timer
(SLEEP - button M)
Press this button to set the night timer (SLEEP)
with the remote 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:
1 hr, 2 hr, 3 hr, 4 hr, 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.
15

Setting the hour
(Button N)
1. With the remote control
connected or disconnected,
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.
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.
CAUTION !!!
The air conditioner will not work if there are
curtains, doors or other objects blocking the
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 the wall.
NOTE
Always use the remote control to set
the position of the air deflectors;
otherwise operational anomalies
may result. Disconnect the unit and
reconnect it when manually setting
the grid outside of the range.
16

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 (refrigeration),
Dry (dehumidification), and
Fan only (ventilation)
•Fan Speeds: Low, Medium, High and Auto
•Deflector temperature: Between 17 and
32°C (63 and 90°F)
•Cancellation of temperature sensor of
unit: Allows you to use the air sensor
located on the remote control instead of
the sensor located inside the unit.
•Diagnostics: Detects errors in the remote
control air sensor.
0 The code “A1” shown on the display
indicates this anomaly.
(up)
(down)
“UP” and “DOWN”
buttons
Buttons for increasing or
decreasing the temperature
or selecting the air deflector
modes “AUTO” or
“SWINIGING”
Operating mode selection
button.
Air deflector or fan selection
button.
17

Display the selected functions
1. Disconnected
2. Selected temperature/ambient temperature
3. Set temperature
4. Deflector operating position
5. Fan speed
6. Refrigeration
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 = 22°C
°F or °C = C
Deflector (louver) = AUTO
Cancellation of the Ambient Thermistor = OFF
Refrigeration Only = Cool
18

SETTING THE OPERATING MODE
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
again to switch to the next mode. The active
mode will always be displayed in normal
operation.
NOTE
If the “MODE” button is not
pressed for 15 seconds, the next
command always changes the
mode to OFF.
The available operating modes to select from
are:
Remote Refrigeration Only
OFF (disconnected)
COOL (refrigeration)
DRY (dehumidification)
FAN ONLY (ventilation)
OFF Mode
• OFF mode
• Ambient Temperature: if configured by
canceling the ambient environment
sensor. Otherwise none.
Available Buttons
• “MODE” button
COOL and DRY modes
• ICON of the Operating Mode.
• Ambient Temperature: if configured by
canceling the temperature 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
Louver settings – air deflector – selected
by the user.
Available Buttons
• All the Buttons are available.
DRY
Dehumidification Operation
COOL
Refrigeration Operation
19