Carrier 40MBAB User manual

Specifications subject to change without notice.
TABLE OF CONTENTS
PAGE
A NOTE ABOUT SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CONTROLS OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
REMOTE CONTROLLER FUNCTIONS . . . . . . . . . . . . . . . . . . . . 4
REMOTE SCREEN INDICATOR . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BASIC FUNCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SETTING THE TIMER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ADVANCED FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
AUTO START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ENERGY SAVING RECOMMENDATIONS . . . . . . . . . . . . . . . . 11
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Scan to access French documentation:
A220698
Fig. 1 — Air Handler
NOTE TO EQUIPMENT OWNER:
Please read this Owner’s Information Manual carefully before installing and using this appliance and keep this manual for future
reference.
For your convenience, please record the model and serial numbers of your new equipment in the spaces provided. This information, along
with the installation data and dealer contact information, will be helpful should your system require maintenance or service.
UNIT INFORMATION
Model # _______________________________
Serial # ________________________________
INSTALLATION INFORMATION
Date Installed ___________________________
DEALERSHIP CONTACT INFORMATION
Company Name: ______________________
Address:_____________________________
Phone Number:________________________
Technician Name:______________________
Owner’s Manual

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
A NOTE ABOUT SAFETY
Any time you see this symbol in manuals, instructions and on the unit, be
aware of the potential for personal injury. There are 3 levels of precaution:
1. DANGER identifies the most serious hazards which will result in
severe personal injury or death.
2. WARNING signifies hazards that could result in personal injury or
death.
3. CAUTION is used to identify unsafe practices which could result in
minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
GENERAL
The Air Handler fan coil unit provides quiet, maximum comfort. In addition to
cooling and/or heating, the Air Handler fan coil unit, matched with an outdoor
condensing unit, filters and dehumidifies the air in the room to provide
maximum comfort.
IMPORTANT: The Air Handler fan coil unit should be installed by
authorized personnel only; using approved tubing and accessories. If
technical assistance, service or repair is needed, contact the installer.
The Air Handler fan coil unit can be set up and operated from the remote
control or the wired controller (both provided).
Operating Modes:
The Air Handler fan coil unit has four operating modes:
• FAN ONLY
• AUTO
• HEATING
• COOLING
FAN ONLY
In the FAN ONLY mode, the system filters and circulates the room air
without changing the room air temperature.
AUTO
In the AUTO mode, the system automatically cools or heats the room
according to the user-selected set point.
NOTE: AUTO mode is recommended for use on single zone
applications only. Using AUTO changeover on multi-zone applications
could set an indoor unit to STANDBY mode, indicated with two dashes (-
-) on the display, which turns the indoor unit off until all the indoor units
are in the same mode; either COOLING or HEATING.
NOTE: HEATING is the system’s priority mode. Simultaneous
HEATING and COOLING is not allowed.
HEATING
In the HEATING mode, the system heats and filters the room air.
COOLING
In the COOLING mode, the system cools, dries and filters the room air.
PERSONAL INJURY, DEATH AND / OR PROPERTY
DAMAGE HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical shock, or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or service agency must use factory-authorized kits or
accessories when modifying this product.
Read and follow all instructions and warnings, including labels
shipped with or attached to the unit before operating your new air
conditioner.
WARNING

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
ACCESSORIES
The system is shipped with the following accessories (see Table 1). Keep
the owner's manual in a safe place and do not discard any accessories
until the installation has been completed.
Table 1 — Accessories
* The wireless remote can use the IR receiver in the wired controller for
easy access to service/engineering mode.
A220704
Fig. 2 — Air Handler
A220705
Fig. 3 —Indoor Unit Representation
Name Shape Quantity
Owner’s and
Installation Manual 2
Remote Controller* 1
Batteries 2
Flare to Weld Adapter
(60K model only -
Suction Line 7/8”)
1
Wired Control 1
Zip Ties 2
Coil Foam Tape 4
Flare to Weld Adapter
(60K model only -
Liquid line 3/8”)
1
Refrigerant Connecting Pipe
Drain Hose
Drain Hose

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
CONTROLS OPTIONS
The air handler fan coil unit can be controlled mainly through the following methods.
1. Wired controller (Included) - KSACN1001AAA
Non-polarity controller used to operate all functions. The wired controller is equipped with an infrared receiver and can be used in conjunction
with the wireless controller.
2. Wireless controller (Included)
Hand-held wireless remote provides the same functionality as the wired controller and can be used independently or in conjunction with the
wired controller.
3. Third party heat pump thermostat (Not Included)
Allows the control of the air handler via the built-in 24V interface.
Refer to the installation manual for additional information.
REMOTE CONTROLLER FUNCTIONS
Review Figure 4 for a description of the remote controller functions.
Fig. 4 —Remote Controller Functions
Increases temperature in
1°F (1°C) increments.
Max. temperature is
86°F (30°C).
Decreases temperature
in 1°F(1°C) increments.
Min. temperature is
60°F(16°C).
Scrolls through operation
functions as follows:
Fresh( )
FOLLOW ME ( )
AP mode( ) Fresh...
J
J
J
The selected symbol flashes
on the display area.
Press OK to confirm.
AUTO LOW
MED HIGH
JJ
J
Selects fan speeds in
the following order:
Turns indoor unit’s LED display and
air conditioner buzzer on and o
to create a comfortable and quiet environment.
LED

°C/°F
The temperature display
between the °F & °C.
SLEEP
Saves energy during sleeping
hours.
ON/OFF
SET
Turns the unit on or o.
MODE
OK
Scrolls through operation modes
as follows:
AUTO
J COOL
J
DRY JHEAT JFAN
TIMER ON
TIMER OFF
TEMP
TEMP
Use to conrm the selected
functions

Sets timer to turn unit o
(see How to Use Basic
Functions for instructions).
Sets timer to turn unit
on (see How to Use Basic
Functions for instructions).
FAVORITE
Use to restore the current
settings or resume previous
settings.
FAN SPEED

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
5
REMOTE SCREEN INDICATOR
Fig. 5 — Remote Screen Indicators
Transmission Indicator
MODE display
TIMER ON display
FAN SPEED
display
TIMER OFF display
LOCK display
Not available for
this unit
Temperature/Timer/Fan speed
display
Fresh feature display
Sleep mode display
FOLLOW ME feature display
Wireless control feature display
Low battery detection display
(If flashes)
Displays when LOCK feature
is activated.
Lights up when remote
sends signal to indoor
unit Displays the current
including:
mode,
Displays the set temperature
by default, or fan speed or
timer setting when using
TIMER ON/OFF functions.
Temperature range:
60-86°F/16-30°C
Timer setting range:
0-24 hours
This display is blank when
operating in FAN mode.
Horizontal louver auto
swing display
LOW
MED
HIGH
AUTO
Displays selected fan speed:
This fan speed can not be
adjusted in
AUTO or DRY
mode.

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
6
BASIC FUNCTIONS
NOTE: Before operation, ensure the unit is plugged in and power is
available.
SETTING TEMPERATURE
The operating temperature range for units is 60-86°F (16-30°C).
You can increase or decrease the set temperature in 1°F (1°C) increments.
AUTO Mode
A221170
Fig. 6 —Auto Mode
In AUTO mode, the unit will automatically select the COOL, FAN, or
HEAT function based on the set temperature.
1.Press the MODE button to select AUTO.
2.Set your desired temperature using the TEMP or TEMP button.
3. Press the ON/OFF button to start the unit.
NOTE: FAN SPEED cannot be set in AUTO mode.
Cool Mode
A221170
Fig. 7 —Cool Mode
1. Press the MODE button to select COOL mode.
2. Set your desired temperature using the TEMP or TEMP .
3. Press FAN button to select the fan speed: AUTO, LOW, MED,
HIGH.
4. Press the ON/OFF button to start the unit.
DRY Mode (Dehumidifying)
A221172
Fig. 8 —Dry Mode (Dehumidifying)
1. Press the MODE button to select DRY.
2. Set your desired temperature using the TEMP or TEMP
button.
3. Press the ON/OFF button to start the unit.
NOTE: FAN SPEED cannot be changed in DRY mode.
Heat Mode
A221174
Fig. 9 —Heat Mode
1. Press the MODE button to select HEAT mode.
2. Set your desired temperature using the TEMP or TEMP
button.
3. Press FAN button to select the fan speed: AUTO, LOW, MED,
HIGH.
4. Press the ON/OFF button to start the unit.
NOTE: As outdoor temperature drops, the performance of your
unit’s HEAT function may be affected. In such instances, we
recommend using this air conditioner in conjunction with
other heating appliances.
Fan Mode
A221173
1. Press the MODE button to select FAN mode.
2. Press FAN button to select the fan speed: AUTO, LOW, MED,
HIGH.
3. Press the ON/OFF button to start the unit.
NOTE: You cannot set temperature in FAN mode. As a result, your
remote control’s LCD screen will not display temperature.
1
3
2
1
3
2
4
1
3
2

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
SETTING THE TIMER
TIMER ON/OFF - Set the amount of time after which the unit will
automatically turn on/off.
TIMER ON Setting
1. Press TIMER ON button to initiate the ON time sequence.
2. Press up or down button for multiple times to set the desired time to
turn on the unit.
3. Point the remote at the unit and wait 1 second. The TIMER ON will
be activated.
TIMER OFF Setting
1. Press TIMER OFF button to initiate the OFF time sequence.
2. Press Temp. up or down button for multiple times to set the desired
time to turn off the unit.
3. Point the remote at the unit and wait 1 second. The TIMER OFF will
be activated.
NOTES:
1. When setting the TIMER ON or TIMER OFF, the time will increase by
30 minutes increments with each press, up to 10 hours. After 10 hours
and up to 24, it will increase in 1 hour increments. (For example, press
5 times to get 2.5h, and press 10 times to get 5h,) The timer will revert
to 0.0 after 24.
2. Cancel either function by setting its timer to 0.0h.

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
TIMER ON and OFF Setting (Example)
The time periods set for both functions refer to hours after the current time.
Example: If current timer is 1:00PM, to set the timer as above steps, the unit will turn on 2.5h later (3:30PM) and turn off at 6:00PM.

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
9
ADVANCED FUNCTIONS
FAVORITE FUNCTION
Press FAVORITE button
Push this button when remote controller is on. The system will
automatically revert back to the previous settings including operating
mode, setting temperature, fan speed level and sleep feature (if activated).
If pushing more than 2 seconds, the system will automatically restore the
current operation settings including operating mode, setting temperature,
fan speed level and sleep feature (if activated).
°C/°F
Pressing this button will alternate the temperature display between the °C
and °F.
LED DISPLAY
Press the LED button.
SLEEP FUNCTION
Press SLEEP button.
The SLEEP function is used to decrease energy while you sleep and the
same temperature settings are not needed for comfort. This function can
only by activated through the remote control.
See Sleep Operation in the USER’S MANUAL for further details.
NOTE: The SLEEP function is not available in FAN or DRY mode.
LOCK FUNCTION
Press the LED and °C/°F buttons simultaneously for at least 5 seconds to
activate Lock function.
All buttons will not response unless these two buttons are simultaneously
pushed again for two seconds to disable locking.
Press this button to turn on and turn off the display on the indoor unit.

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
SET FUNCTION
• Press the SET button to enter the function setting, then press SET button or TEMP or TEMP button to select the desired function. The
selected symbol will flash on the display area, press the OK button to confirm.
• To cancel the selected function, just perform the same procedures as above.
• Press the SET button to scroll through operation functions as follows:
FRESH ( ) FOLLOW ME ( ) AP MODE ( )
[*] If your remote controller has Fresh button, you can not use the SET button to select Fresh feature.
FRESH FUNCTION ( ) (some units):
When the FRESH function is initiated, the Ionizer/Plasma Dust Collector (depending on models) is energized and will help to remove pollen and
impurities from the air.
FOLLOW ME FUNCTION ( ):
The FOLLOW ME function enables the remote control to measure the temperature at its current location and send this signal to the air conditioner
every 3 minutes interval. When using AUTO, COOL, or HEAT modes, measuring ambient temperature from the remote control (instead of from the
indoor unit) will enable the unit to optimize the temperature around you and ensure maximum comfort.
AP FUNCTION ( ) (some units):
Choose AP mode to do wireless network configuration. For some units, it will not work by pressing the SET button. To enter the AP mode,
continuously press the LED button seven times in 10 seconds.

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
11
AUTO START
If the power fails while the unit is operating, the unit stores the operating
condition, and the unit automatically starts operating under those
conditions once the power is restored.
ENERGY SAVING
RECOMMENDATIONS
The following recommendations will add greater efficiency to the
ductless system:
• Select a comfortable thermostat setting and leave it at the selected
setting. Avoid continually raising and lowering the setting.
• Keep the filter clean. Frequent cleaning may be necessary
depending on the indoor air quality.
• Use drapes, curtains or shades to keep direct sunlight from heating
the room on very hot days.
• Limit the unit’s run time by using the TIMER function.
• Do not obstruct the air intake on the front panel.
• Turn on the air conditioning unit before the indoor air becomes too
uncomfortable.
• DO NOT set the unit to excessive temperature levels.
• While cooling, close the curtains to avoid direct sunlight.
• Doors and windows should be kept closed to keep cool or warm air
in the room.
• DO NOT place objects near the air inlet and outlet of the unit.
• Clean the air filter every two weeks.
• Adjust the louvers properly and avoid direct airflow.
A220717
Fig. 10 —Close curtains, doors and windows
CARE AND MAINTENANCE
CLEANING YOUR INDOOR UNIT
Contact an authorized service technician for repair or maintenance.
Improper repair and maintenance may cause water leakage, electrical
shock, or fire and may void your warranty.
DO NOT substitute a blown fuse with a higher or lower amperage rating
fuse, as this may cause circuit damage or an electrical fire.
Ensure the drain hose is set up according to the instructions. Failure to do
so may cause leakage and result in personal property damage, fire and
electric shock.
Ensure all wires are connected properly. Failure to connect wires according to
instructions can result in electrical shock or fire.
Closing curtains during heating also
helps keep the heat in
Doors and windows should be kept closed
BEFORE CLEANING OR MAINTAINING THE UNIT
Always turn the unit off and disconnect its power supply before
cleaning or maintaining the unit.
When removing filter, do not touch metal parts in the unit. The
sharp metal edges can cut.
DO NOT use water to clean the inside of the indoor unit. This can
destroy insulation and cause an electrical shock.
DO NOT expose the filter to direct sunlight when drying. This can
shrink the filter.
CAUTION
Any maintenance and cleaning of the outdoor unit should be
performed by an authorized dealer or a licensed service provider.
Any unit repairs should be performed by an authorized dealer or a
licensed service provider.
CAUTION
MAINTAINING THE UNIT
Only use a soft, dry cloth to wipe the unit clean. If the unit is
especially dirty, you can use a cloth soaked in warm water to wipe
it clean.
DO NOT use chemicals or chemically treated cloths to clean the
unit. DO NOT use benzene, paint thinner, polishing powder or
other solvents to clean the unit. They can cause the plastic surface
to crack or deform.
DO NOT use water hotter than 104°F (40°C) to clean the front
panel. This can cause the panel to deform or become discolored.
DO NOT wash the unit under running water. Doing so creates an
electrical hazard. Clean the unit using a damp, lint-free cloth and
neutral detergent. Dry the unit with a dry, lint-free cloth.
CAUTION

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
12
CLEANING THE FILTER
The filter prevents dust and other particles from entering the indoor unit. Dust
buildup can reduce the efficiency of the air conditioner. For optimum
efficiency, clean the air filter every two weeks or more frequently if you
reside in a dusty area. Replace the filter with a new one if the filter is heavily
clogged and cannot be cleaned.
NOTE: In households with animals, you may have to periodically
wipe down the grille to prevent animal hair blocking the
unit’s airflow.
1. Remove the filter cover.
2. Remove the air filter.
3. Clean the air filter by vacuuming the surface or washing the filter in
warm water with mild detergent.
A220718
Fig. 11 —Remove the air filter cover
A220719
Fig. 12 —Cleaning filter with water or vacuum
MAINTENANCE – LONG PERIODS OF NON-USE
If you plan not to use the air conditioner for an extended period of time,
perform the following steps:
1. Clean all filters.
A220720
Fig. 13 —Clean all filters
2. Turn on the FAN function until the unit dries out completely.
A220722
Fig. 14 —Turn on the FAN function
3. Turn off the unit and disconnect the power.
A220723
Fig. 15 —Turn off the unit and disconnect the power
MAINTENANCE - PRE-SEASON INSPECTION
After long periods of non-use, or before periods of frequent use, do the
following:
1. Check for damaged wires.
A220724
Fig. 16 —Check for damaged wires
2. Clean all filters
A220720
Fig. 17 —Clean all filters
3. Check for leaks.
A220721
Fig. 18 —Check for leaks
4. Ensure nothing is blocking the air inlets and outlets.
A220725
Fig. 19 —Remove obstacles blocking air inlets/outlets

40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
13
TROUBLESHOOTING
The issues in Table 2 are not malfunctions and in most cased do not require repairs.
Table 2 — Common Issues
NOTE: If an issue persists, contact a local dealer or your nearest customer service center. Provide them with a detailed
description of the unit’s malfunction as well as the unit’s model number.
Issue Possible Causes
Unit does not turn on when user
presses ON/OFF
The unit has a 3-minute protection feature that prevents the unit from overloading. The unit cannot be restarted
within three minutes after being turned off.
COOLING and HEATING models: If the Operation light and PRE-DEF (Pre-heating/ Defrost) indicators are
illuminated, the outdoor temperature is too cold and the unit’s anti-cold wind is activated to defrost the unit.
In the COOLING-only models: If the “Fan Only” indicator is illuminated, the outdoor temperature is too cold and
the unit’s anti-freeze protection activates to defrost the unit.
The unit changes from COOL/
HEAT mode to FAN mode
The unit may change its setting to prevent frost from forming on the unit. Once the temperature increases, the unit
starts operating in the previously selected mode again.
The set temperature has been reached, at which point the unit turns off the compressor. The unit continues
operating when the temperature fluctuates again.
The indoor unit emits white
mist
In humid regions, a large temperature difference between the room’s air and the conditioned air can cause white
mist.
Both the indoor and outdoor
units emit white mist
When the unit restarts in the HEAT mode (after defrosting), white mist may be emit due to moisture generated
from the defrosting process.
The indoor unit makes noises
A squeaking sound is heard when the system is OFF or in the COOL mode. The noise is also heard when the drain
pump (optional) is operating.
A squeaking sound may occur after running the unit in the HEAT mode due to expansion and contraction of the
unit’s plastic parts.
Both the indoor unit and
outdoor unit make noises
Low hissing sound during operation: This is normal and is caused by refrigerant gas flowing through both the
indoor and outdoor units.
Low hissing sound when the system starts, has just stopped running, or is defrosting. This noise is normal and is
caused by the refrigerant gas stopping or changing direction.
Squeaking sound: Normal expansion and contraction of plastic and metal parts caused by temperature changes
during operation can cause squeaking noises.
The outdoor unit makes noises The unit makes different sounds based on the current operating mode.
Dust emits from either the
indoor or outdoor unit
The unit may accumulate dust after extended periods of non-use. Dust can emit when the unit is turned on. This can
be mitigated by covering the unit during long periods of inactivity.
The unit emits a bad odor
The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will emit
during operations.
The unit’s filters have become moldy and should be cleaned.
The outdoor unit fan does not
operate
During operation, the fan speed is controlled to optimize product operation.
SAFETY PRECAUTIONS
If any of the following conditions occur, turn off the unit
immediately:
The power cord is damaged or abnormally warm.
You smell a burning odor.
The unit emits loud or abnormal sounds.
A power fuse blows or the circuit breaker frequently trips.
Water or other objects fall into or out of the unit.
DO NOT attempt to fix these issues yourself. Contact an
authorized service provider immediately!
WARNING

© 2022 Carrier. All rights reserved.
A Carrier Company
Edition Date: 07/22 Catalog No: 40MBAB-02OM
Replaces: 40MBAB-01OM
40MBAB: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
14
TROUBLESHOOTING (CONT)
When issues occur, please review the following common issues in Table 3 prior to contacting a service company.
Table 3 — Troubleshooting Tips
Problem Possible Causes Solution
Poor Cooling Performance
Temperature setting may be higher than the ambient
room temperature Lower the temperature setting
The heat exchanger on the indoor or outdoor unit is
dirty Clean the affected heat exchanger
The air filter is dirty Remove the filter and clean it according to instructions
The air inlet or outlet of either unit is blocked. Turn the unit to remove the obstruction and turn it back on
Doors and windows are open Ensure that all doors and windows are closed while
operating the unit
Excessive heat is generated by sunlight Close windows and curtains during periods of high heat or
bright sunshine
There are too many heat sources in the room (people,
computers, electronics, etc.) Reduce the amount of heat sources
Low refrigerant due to leak or long-term use Check for leaks, re-seal if necessary and top off the
refrigerant
The unit is not working
Power failure Wait for the power to be restored
The power is turned off Turn on the power
The fuse is burned out Replace the fuse
The unit’s 3-minute protection has been activated Wait three minutes after restarting the unit
Timer is activated Turn timer off
The unit starts and stops
frequently
There is too much or too little refrigerant in the
system Check for leaks and recharge the system with refrigerant
Incompressible gas or moisture has entered the system Evacuate and recharge the system with refrigerant
System circuit is blocked Determine which circuit is blocked and replace the
malfunctioning piece of equipment
The compressor is broken Replace the compressor
The voltage is too high or too low Install a manostat to regulate the voltage
Poor heating performance
The outdoor temperature is extremely low Use an auxiliary heating device
Cold air is entering through doors and windows Ensure that all doors and windows are closed during use
Low refrigerant due to leak or long-term use Check for leaks, re-seal if necessary and top off refrigerant