Carrier 40MBD Series User manual

Specifications subject to change without notice.
TABLE OF CONTENT
PAGE
A NOTE ABOUT SAFETY ........................................................................................................................2
GENERAL...................................................................................................................................................2
PARTS LIST................................................................................................................................................3
DISPLAY PANEL.......................................................................................................................................3
FUNCTION BUTTONS..............................................................................................................................4
REMOTE CONTROL .................................................................................................................................6
REMOTE CONTROL FUNCTIONS..........................................................................................................7
CLEANING, MAINTENANCE AND TROUBLESHOOTING ................................................................9
TROUBLESHOOTING.............................................................................................................................11
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
40MBD
Ducted Style Ductless System
Sizes 09 to 48

2 Specifications subject to change without notice. OM-40MBD-04
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 high wall fan coil unit provides quiet, maximum comfort. In
addition to cooling and/or heating, the high wall fan coil unit matched
with an outdoor condensing unit filters and dehumidifies the air in the
room to provide maximum comfort.
IMPORTANT: The high wall 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 high wall fan coil unit can be set up and operated from the remote
control (provided). If the remote is misplaced, the system can be
operated from the “Auto” setting on the unit.
Operating Modes
The high wall fan coil unit has five operating modes:
• FAN Only
• AUTO
• HEATING (heat pumps only)
•COOLING
• DEHUMIDIFICATION (DRY)
FAN Only
In the FAN Only mode, the system filters and circulates the room air
without changing 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 will turn off the indoor unit
until all the indoor units are in the same mode (COOLING or
HEATING). 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.
DEHUMIDIFICATION (DRY)
In the DEHUMIDIFICATION mode, the system dries, filters and
slightly cools the room air temperature. This mode prioritizes air
dehumidification but it does not take the place of a dehumidifier.
Wireless Remote Control
The remote control transmits commands to set up and operate the
system. The control has a window display panel that displays the
current system status. The control can be secured to a surface when
used with the mounting bracket provided.
Wired Remote Control (Optional)
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 unit before operating your new air conditioner.
WARNING

OM-40MBD-04 Specifications subject to change without notice. 3
PARTS LIST
Table 1 — Parts List
Fig. 1 — Indoor Unit
DISPLAY PANEL
Fig. 2 — IR Receiver Display Panel
PART NO. PART NAME
1 Air outlet
2 Air inlet
3 Air filter
4 Electric Control Cabinet
5 Wired Controller
6DrainPipe
7 Wireless Remote
Turbo

4 Specifications subject to change without notice. OM-40MBD-04
FUNCTION BUTTONS
Before you begin using your new air conditioner, make sure to familiarize yourself with the remote control.
Fig. 3 — Remote Controller Function Buttons
NOTE: New remote controller Starting on production of week 41 year 2016 (serial number 4116V10001). For advanced functions refer to the
indoor unit’s service manual.
ON/OFF
Turns the unit on or off.
MODE
OK
TIMER
SHORTCUT
CLEAN
LED
Turbo
SLEEP
Scrolls through operation modes
as follows: AUTO
J COOL J
DRY JHEAT JFAN
FAN SPEED
SWING
TEMP
Use to confirm the selected
functions

Decreases temperature
OO
in 1 F(1 C) increments.
Min. temperature is
OO
62 F(17 C).
Increases temperature
OO
in 1 F(1 C) increments.
Max. temperature is
OO
86 F(30 C).
Set timer to turn unit on or off.
Saves energy during sleeping
hours.
Selects fan speeds in the
following order:
AUTO LOW MED HIGH
JJ
NOTE: Holding this button
down for 2 seconds will activate
Silence feature.
Enables unit to reach preset
temperature in shortest
possible time
Use to restore the current
settings or resume previous
settings.
J
Starts and stops the horizontal
louver movement. Hold down
for 2 seconds to initiate vertical
louver auto swing feature.
TEMP
SET
Scrolls through operation
functions as follows:
Fresh( )
Follow Me( )
AP mode( ) Fresh ....
J
J
The selected symbol will
flash on the display area,
press the OK button to
confirm.
Use to start/stop the Clean
function.
Turns indoor unit’s LED display
and air conditioner buzzer on and
off (modeldependent), which
create a comfortable and quiet
environment.
Turbo

OM-40MBD-04 Specifications subject to change without notice. 5
Remote LCD Screen Indicators
Fig. 4 — Wireless Remote Display
Transmission Indicator
MODE display
TIMER ON display
FAN SPEED display
TIMER OFF display
Silence feature
display
ECO display
GEAR display
LOCK display
Temperature/Timer/Fan speed
display
Sleep mode display
Follow me feature display
Wireless control feature display
Low battery detection display(If flashes)
Displays when LOCK feature
is activated.
LOW
MED
HIGH
AUTO
Lights up when remote
sends signal to indoor
unit
Displays selected fan speed:
Displays the current
including:
mode,
This fan speed can not be
adjusted in
AUTO or DRY
mode.
Not available for this unit
Not available for this unit
Displays the set temperature
by default, or fan speed or
timer setting when using
TIMER ON/OFF functions.
Temperature range:
oo
o
17-30 C/62-86 F
Timer setting range:
0-24 hours
This display is blank when
operating in FAN mode.
(20-28 C)
(Model dependent)
Fresh feature display(some units)
(No displays when Fresh feature is activated)

6 Specifications subject to change without notice. OM-40MBD-04
REMOTE CONTROL
IMPORTANT: The remote control can operate the unit from a distance
of up to 26 ft. (8 m) as long as there are no obstructions.
NOTE: If a wireless remote controller is used, relocate the IR
Receiver within line of sight of the remote location using the 6 ft.
cable included. The factory location of the IR receiver is inside the
control box.
When the timer function is used, the remote control should be kept in
the vicinity of the fan coil (within 26 ft. (8 m).
The remote control can perform the following basic functions:
• Turn the system ON and OFF
• Select the operating mode
• Adjust room air temperature set point and fan speed
• Adjust right-left airflow direction
Refer to the “Remote LCD Screen Indicators” on page 5 for a detailed
description of all the capabilities of the remote control.
Battery Installation
Two AAA 1.5v alkaline batteries (included) are required for remote
control operation.
To install or replace batteries:
1. Slide the back cover off the control to open the battery
compartment.
2. Insert the batteries. Follow the polarity markings inside the battery
compartment.
3. Replace the battery compartment cover.
NOTES:
1. When replacing batteries, do not use old batteries or a different type
battery. This may cause the remote control to malfunction.
2. If the remote is not going to be used for several weeks, remove the
batteries. Otherwise, battery leakage may damage the remote
control.
3. The average battery life under normal use is about 6 months.
4. Replace the batteries when there is no audible beep from the indoor
unit or if the Transmission Indicator fails to light.
5. When batteries are removed, the remote control erases all
programmed settings. The control must be reprogrammed after the
insertion of new batteries.
Remote Control Operation - Quick Start
NOTE: When transmitting a command from the remote control to the
unit, be sure to point the control toward the right side of the unit. The
unit confirms receipt of a command by sounding an audible beep.
1. Turn the unit on by pushing ON/OFF.
NOTE: If there is a preference for °C rather than °F (default),
press and hold and temperature set point buttons together
for approximately 3 seconds.
2. Select the desired mode by pushing MODE.
Fig. 5 —Modes
3. Select the temperature set point by pointing the control toward the
unit and pressing the increase/decrease temperature set point
buttons until the desired temperature appears on screen.
4. Press FAN to select the desired fan speed.
NOTE: If the unit is operating in DRY or AUTO mode, the fan
speed will be automatically set.
Manual Operation
If the remote control is lost, damaged, or the batteries are exhausted, the
MANUAL button located on the IR Receiver can be used to run the unit.
When MANUAL is pressed once, the AUTO mode takes affect (heat or
cool). When this button is pressed twice, the system enters the TEST
mode and runs for 30 minutes in the COOLING mode (it will run in the
AUTO mode afterward). When pressed three times, the system turns off.
Fig. 6 — IR Receiver Display Panel
The set conditions of manual operation are as follows:
• Preset set point: 76°F (24°C)
• Fan speed: AUTO
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage. Handle the
control with care and avoid getting the control wet.
CAUTION
AUTO COOL DRY
HEAT
FAN
Ÿź

OM-40MBD-04 Specifications subject to change without notice. 7
REMOTE CONTROL FUNCTIONS
Pressing ON/OFF
When the air conditioner is not in operation, the remote control
displays the last set point and mode.
• Press ON/OFF to start the unit.
- The unit starts in the last operating mode and set point. The
ON/OFF indicator appears.
• Press ON/OFF to stop the unit.
- All the indicator lights on the unit go out, and the remote
control displays the set point and mode.
NOTE: If ON/OFF is pressed too soon after a stop, the
compressor will not start for 3 to 4 minutes due to the inherent
protection against frequent compressor cycling. The unit only
emits an audible beep when the signals are received correctly.
Selecting an Operating Mode
Use OPERATING MODE to select one of the available modes.
Fig. 7 — Display
Setting the Room Temperature Set Point
Press the increase temperature set point and decrease buttons
to raise or lower the temperature. The unit confirms the signal receipt
with a beep and the value of the set temperature appears on the display
and changes accordingly. The temperature can be set between 62°F
(17°C) and 86°F (30°C) in increments of 1°F or 1°C.
NOTE: In the COOLING mode, if the temperature selected is higher
than the room temperature, the unit will not start. The same applies for
the HEATING mode if the selected temperature is lower than the
room temperature.
Selecting the Fan Speed
Fig. 8 — Fan Speeds
1. Press FAN to select the fan speed.
NOTE: When the unit is on, the fan runs continuously in COOLING
or HEATING. When in HEATING, there may be situations where the
fan slows down or shuts off to prevent cold blow.
DIRECT
NOTE: The DIRECT feature is not available on this model.
SWING
NOTE: The SWING feature is not available on this model.
Timer Function
TIMER ON (to start the unit) and TIMER OFF (to stop the unit) can
be used separately or together.
Timer ON only
This function allows the unit to start automatically at the set time. The
TIMER ON can be set while the unit is on or off.
UNIT ON
a. Press TIMER ON to initiate the auto-on time sequence.
The set time is displayed in the remote control display.
Every time TIMER ON is pressed, the time increases by
30 minutes, up to 10 h. It increases by 60 minutes,
afterwards, until the time setting reaches 24 h.
b. When TIMER ON is set, the unit’s TIMER light
illuminates. The unit continues to run at the set time.
UNIT OFF
a. Set the timer described in the UNIT ON section.
b. The unit starts at the set time.
Adjust the TIMER ON settings to 0.0 to cancel this option.
Timer OFF only
This function allows the unit to stop automatically at the set time. The
timer can be set while the unit is on or while it is off.
UNIT ON
a. Press TIMER OFF to initiate the AUTO-OFF time
sequence. The set time appears on the remote control
display. Everytime TIMER OFF is pressed, the time
increases by 30 minutes, up to 10 h. It increases by 60
minutes, afterwards, until the time settings reach 24 h.
b. When TIMER OFF is set, the timer light on the unit
illuminates and the unit turns off automatically at the set time.
UNIT OFF
a. Set the TIMER OFF as described in the UNIT ON
section. The TIMER display on the unit illuminates and
the unit remains off.
b. Adjust the TIMER ON settings to 0.0 to cancel this option.
Timer ON and Timer OFF
Use both functions to program the unit to turn on and shut off at
specified times.
UNIT OFF
a. Set TIMER ON as previously described.
b. Set TIMER OFF as previously described. The unit starts
automatically at the set TIME ON and turns off at the set
TIME OFF.
UNIT ON
a. Set TIME OFF as previously described.
b. Set TIME ON as previously described. The unit turns off
automatically at the set TIME OFF and turns on at the set
TIME ON.
Ÿ
ź
AUTO LOW MED
HIGH

8 Specifications subject to change without notice. OM-40MBD-04
Sleep Mode
SLEEP mode is used to conserve energy and can be used when the
unit is in the COOL, HEAT or AUTO mode only.
Cool Mode
a. Push the SLEEP button. After 1 hour the set point raises by
1.8_F (1_C). After another hour, the set point raises by
another 1.8_F (1_C) and the fan runs in a low speed. The
unit shuts off 5 hours after setting the SLEEP mode. The
SLEEP mode cancels if either the “Mode”, “TEMP”,
“Fan”, “Timer”, or “On/Off” buttons on the remote control
is pressed.
Heat Mode
Same as COOLING mode however set points are lowered by 1.8_F
(1_C).
Turbo Mode
Use the TURBO mode to cool or heat the room rapidly.
a. Press TURBO. An audible “beep” is heard if the indoor
unit supports this function. The fan runs on super high
speed. The TURBO mode terminates automatically 20
minutes after pushing TURBO. It can be terminated
immediately by selecting TURBO again. When the
TURBO mode is terminated, the unit reverts to the original
setting.
Self Clean Mode (Available only on sizes 9 to 24)
Press Self Clean to activate or deactivate the self-cleaning function.
Under this function, the air conditioner automatically cleans and dries
the evaporator. The cleaning cycle takes 30 minutes, after which the
unit turns off automatically. Pressing Self Clean in the middle of the
cycle cancels the operation and turn off the unit. This function can be
activated only on COOL or DRY mode.
Follow Me Mode
Press Follow Me to activate or deactivate this function. Under
this setting, the temperature that appears in the remote control is
the actual temperature at its location. The remote control sends
this signal to the air conditioner every 3 minutes. This function
is not available for DRY and FAN modes.
Freeze Protection Mode
Press FP for approximately 2 seconds to activate or deactivate the
freeze protection mode (heating set back). The indoor unit displays
“FP”.
NOTE: This function is only available in the HEATING mode.
Under this function, the unit operates at high fan speed and the coil
temperature automatically sets to 46_F (8_C). This mode can also
be deactivated by pressing the “On/Off”, “Sleep”, “Mode”, “Fan”,
or either “TEMP” buttons.
Silence Mode
NOTE: The Silence Mode (SLC) feature is not available on this
model.
LED Light
Press LED to turn the display light on and off.
Resetting the Remote Control
If the batteries in the remote control are removed, the current
settings will cancel and the control returns to the initial settings and
will be in STANDBY mode. Push ON/OFF to activate it.
Time Delay
If ON/OFF is pressed too soon after a stop, the compressor will not
start for 3 to 4 minutes due to the inherent protection against frequent
compressor cycling. The unit only emits an audible beep when the
signals are received correctly.
Heating Features
If the unit is in the HEATING mode, there is a delay when the fan
starts. The fan starts only after the coil is warmed up to prevent
cold blow.
Auto Defrost Operation
In HEATING mode, if the outdoor coil is frosted, the indoor
fan and outdoor fan turns off while the system removes the frost
from the outdoor coil. The system automatically reverts to
normal operation when frost is removed from the outdoor unit.
Auto Start
If the power fails while the unit is operating, the unit stores the
operating condition, and the unit will start operation automatically
under those conditions when the power is restored.

OM-40MBD-04 Specifications subject to change without notice. 9
CLEANING, MAINTENANCE AND TROUBLESHOOTING
Periodic Maintenance
Periodic maintenance is recommended to ensure proper operation of
the unit. Recommended maintenance intervals may vary depending on
the installation environment, e.g., dusty zones, etc. Refer to Table 1 on
page 11.
Cleaning the Coil
Clean the coil at the beginning of each cooling season, or when
necessary. Use a vacuum cleaner or a long-bristle brush to avoid
damage to the coil fins.
Cleaning the Air Filters
Remove and clean the air filters once a month.
NOTE: If air filters show signs of excessive wear or are torn, they
must be replaced. Contact your local dealer for replacement filters.
1. Unscrew filters from the frame.
2. Pull filters down to remove.
Fig. 9 — Remove the filters
3. Vacuum the filters.
Fig. 10 — Vacuum the filters
4. Clean with warm water.
Fig. 11 — Clean filter with warm water
5. Shake the filter to remove excess water and dry thoroughly.
6. Replace the filter by sliding into rack until the filter snaps in place.
7. Close the front panel on the unit.
Preparing for Extended Shutdown Period
Clean the filters and reposition them in the unit. Operate the unit in
FAN ONLY mode for 12 hours to dry all internal parts. Turn the main
power supply off and remove batteries from the remote control.
ELECTRICAL SHOCK HAZARD
Failure to follow this caution may result in personal injury or death. Always
turn off power to the system before performing any cleaning or maintenance to
the system. Turn off the outdoor disconnect switch located near outdoor unit.
Be sure to disconnect the indoor unit if on a separate switch.
CAUTION
EQUIPMENT DAMAGE/OPERATION HAZARD
Failure to follow this caution may result in equipment damage or improper
unit operation.
Operating the system with dirty air filters may damage the indoor unit and
could cause reduced cooling performance, intermittent system operation,
frost build-up on indoor coil or blown fuses.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury. The coil fins are
very sharp. Use caution when cleaning. Always wear safety protection.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage. When cleaning
the front panel, do not use water hotter than 105
°
F (40.6
°
C) and do not pour
water onto the fan coil. Do not use abrasive or petroleum based cleaners as they
may damage the front panel.
CAUTION
FAN/SLC

10 Specifications subject to change without notice. OM-40MBD-04
System Operation Recommendations
The items outlined in the following list help to assure proper system
operation:
•Replace both remote control batteries at the same time.
• Point the remote control toward the unit display panel when
transmitting a command.
• Keep the doors and windows closed while unit is operating.
• Contact an authorized service representative if a problem arises
that cannot be easily resolved.
• Do not perform cleaning or maintenance activities while the unit is
on.
• Keep the display panel on the unit away from direct sunlight and
heat as this may interfere with remote control transmissions.
• Do not block air intakes and outlets on the indoor or outdoor units.
Energy Saving Recommendations
The following recommendations add greater efficiency to the ductless
system:
• Select a comfortable thermostat setting and leave it at chosen
setting. Avoid continually raising and lowering the setting.
• Keep the filter clean. Frequent cleaning may be necessary
depending on 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.

OM-40MBD-04 Specifications subject to change without notice. 11
TROUBLESHOOTING
Refer to Table 2 before contacting your local dealer.
Table 1 — Periodic Maintenance
* Increase frequency in dusty zones.
†Maintenance to be carried out by qualified service personnel. Refer to the Installation Manual
Table 2 — Troubleshooting
* Diagnostic lights are a combination of lights that will illuminate in the display area on the unit. They are a combination of the lights you see during normal operation.
INDOOR UNIT EVERY MONTH EVERY 6 MONTHS EVERY YEAR
Clean Air Filter* 
Change Remote Control Batteries
OUTDOOR UNIT EVERY MONTH EVERY 6 MONTHS EVERY YEAR
Clean Outdoor Coil from Outside 
Clean Outdoor Coil from Inside† 
Blow Air Over Electric Parts† 
Check Electric Connection Tightening† 
Clean Fan Wheel† 
Check Fan Tightening† 
Clean Drain Pans† 
PROBLEM POSSIBLE CAUSE SOLUTION
Unit/System Does Not Work
The circuit breaker has tripped or a fuse has
blown.
Power failure
Diagnostic lights illuminate.*
Voltage is too low.
Reset the circuit breaker or replace the fuse with the
specified replacement fuse.
Call your service representative.
Call your service representative.
Cooling is Not Working Properly
The filter is blocked by dust.
Temperature is not set properly.
A window or door is open.
The outdoor unit is obstructed.
The fan speed is too low.
The operation mode is in FAN instead of
COOL.
Clean the air filter.
Check the temperature and reset if necessary.
Close the window or door.
Remove the obstruction.
Change the fan speed selection.
Change the operating mode to COOL or reset the unit.
Heating is Not Working Properly
The filter is blocked with dust.
Temperature is set too low.
A window or door is open.
The outdoor unit is obstructed.
Clean the air filter.
Check the temperature and reset if necessary.
Close the window or door.
Remove the obstruction.
Unit Stops During Operation The OFF timer is not operating correctly.
Diagnostic lights illuminate.*
Restart the operating mode.
Call your service representative.

Copyright 2020 Carrier Corp. D 3300 Riverwood Parkway Atlanta GA, 30339 Edition Date: 10/20 Catalog No. OM-40MBD-04
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Replaces: OM-40MBD-03