Carrier 40MAHB Series User manual

Specifications subject to change without notice.
Fig. 1 — Sizes 09K - 36K
NOTE: Read the entire instruction manual before starting the
installation.
Images are for illustration purposes only. Actual models
may differ slightly.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS........................................................2
ACCESSORIES................................................................................3
PARTS..............................................................................................4
SYSTEM REQUIREMENTS...........................................................6
WIRING ...........................................................................................6
DIMENSIONS..................................................................................7
CLEARANCES ................................................................................7
PRIOR TO INSTALLATION ..........................................................8
Step 1 - Check Equipment ................................................................8
Step 2 - Select the Installation Location ...........................................8
Step 3 - Attach the Mounting Plate to the Wall................................9
Step 4 - Drill Wall Holes for Connective Piping..............................9
Step 4 - Prepare Refrigerant Piping ..................................................10
Step 5 - Connect the Drain Hose ......................................................11
Step 6 - Connect the Signal and Power Cables.................................12
Step 7 - Wrap Piping and Cables......................................................13
Step 8 - Mount the Indoor Unit.........................................................13
ELECTRICAL DATA......................................................................14
CONNECTION DIAGRAMS ..........................................................14
WIRELESS REMOTE CONTROL INSTALLATION ...................16
WIRED REMOTE CONTROL INSTALLATION..........................17
START-UP .......................................................................................17
TROUBLESHOOTING ...................................................................19
DUCTLESS START-UP CHECKLIST - Single Zone ....................21
Installation Instructions
40MAHB
Ductless Split Unit System
Sizes 9, 12, 18, 24, 30 and 36

2 Specifications subject to change without notice. 40MAHB-01SI
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or use
can cause explosion, fire, electrical shock, or other conditions which may
cause death, personal injury or property damage. Consult a qualified
installer, service agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use factory-authorized
kits or accessories when modifying this product. Refer to the individual
instructions packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing and
work gloves. Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in the literature
and attached to the unit. Consult local building codes and the current
editions of the National Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1. Recognize safety information.
This is the safety-alert symbol . When you see this symbol on the
unit and in instruction manuals, be alert to the potential for personal
injury. Understand the signal words DANGER, WA R N I N G , and
CAUTION. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to identify
unsafe practices which may 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.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or
death. Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag switch
with a suitable warning label.
WA R N I N G
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing oxygen
for leak testing or operating refrigerant
compressors. Pressurized mixtures of air
or gases containing oxygen can lead to
an explosion.
WA R N I N G
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe in the
ground. If any section of pipe is buried, there must be a 6 in. (152
mm) vertical rise to the valve connections on the outdoor units.
If more than the recommended length is buried, refrigerant may
migrate to the cooler buried section during extended periods of
system shutdown. This causes refrigerant slugging and could
possibly damage the compressor at start-up.
CAUTION

40MAHB-01SI Specifications subject to change without notice. 3
ACCESSORIES
The system is shipped with the following accessories (see Table 1). Use
all of the installation parts and accessories to install the system. Improper
installation may result in water leakage, electrical shock and fire, or cause
the equipment to fail. Keep the installation manual in a safe place and do
not discard any other accessories until the installation work has been
completed.
Table 1 — Accessories
Table 2 — Accessories
NAME SHAPE QUANTITY
Installation Manual 2-3
Drain Joint 1
Seal (for cooling
and heating models) 1
Mounting Plate 1
Anchor
5-8
(depending
on models)
Mounting Plate
Screw
5-8
(depending
on models)
Remote Controller 1
Battery 2
Remote Controller
Holder (optional) 1
Remote Controller
Holder Screw
(optional)
2
Small Filter
(Must be installed
on the back of the
main air filter by an
authorized
technician during
unit installation)
1-2
depending
on the model
FROM EDGETO HOLE CENTER:50mm
FROM EDGETO HOLE CENTER:100mm
150
100 100
100
50
50 50
2
2
2
4
44
6
RECOMMAND
LIQUID GAS
BUBBLE
LEVEL
mm inch
mm
inch
Humidity
Boost
NAME SHAPE QUANTITY (PC)
Connecting
Pipe Assembly
Liquid
Side
1/4in(Φ6.35) These parts must
be purchased
separately.
Consult the dealer
about the proper
pipe size of the
unit purchased.
3/8in (Φ9.52)
Gas Side
3/8in (Φ9.52)
1/2in (Φ12.7)
5/8in (Φ16)
3/4in (Φ19)
Magnetic Ring and
Clamp (if supplied
refer to the wiring
diagram to install it
to the cable.
Varies by model
1 2 3
Pass the cable
through the
Magnetic Ring hole.

4 Specifications subject to change without notice. 40MAHB-01SI
PARTS
Fig. 2 — Parts
NOTE: Illustrations in this manual are for reference only. The actual shape of the indoor unit and parts may differ slightly.
1. Wall Mounting Plate
2. Front Panel
3. Louver
4. Air Filter
5. Drainage Pipe
6. Signal Cable
7. Refrigerant Piping
8. Remote Controller
9. Remote Controller Holder (some units)
10. Outdoor Unit Power Cable (some units)
NOTES:
- If the outdoor unit is higher than the indoor unit, prevent
rain from flowing into the indoor unit along the
connection pipe by making a inverted trap in the
connection pipe before it enters the wall to the indoor
unit. This ensures that rain drips from the connection
pipe before it enters the wall.
- Piping and the interconnecting wiring are field supplied.
- The illustration above (Fig. 2) is only a sketch. Different
models may be differ slightly.
The units listed in Table 3 are addressed in these installation
instructions.
Table 3 — Indoor Units
1
2
3
5
6
78
9
10
4
Humidity
Boost
DESCRIPTION BTUH V-PH-HZ ID MODEL NO.
12 115-1-60 40MAHBQ12XA1
HIGH WALL
HEAT PUMP
9
208/230-1-60
40MAHBQ09XA3
12 40MAHBQ12XA3
18 40MAHBQ18XA3
24 40MAHBQ24XA3
30 40MAHBQ30XA3
36 40MAHBQ36XA3

40MAHB-01SI Specifications subject to change without notice. 5
PARTS (CONT)
NOTE: The installation must be performed in accordance with the requirement of local and national standards. The installation may
differ slightly in some areas.
Fig. 3 — Parts and Display Window Descriptions
NOTE: Different models have different front panels and display windows.
Displays temperature, operation feature and error codes:
Remote Control
Remote Control Holder
(some units)
Louver
Front Panel
Air Filter
(pull up to remove)
Display window
(A) (B) (C)
ECO intelligent eye
(some units)
Display Code
Meanings
for 3 seconds when:
• TIMER OFF is set
when DEFROSTING (for COOLING and HEATING units)
when Active Clean feature is turned on (for the inverter split type)
when the SELF CLEAN feature is turned on (for the xed-speed type)
when ECO feature is activated (some units)
when the wireless control feature is activated (some units)
when 46°F(8°C) HEATING mode is turned on (some units)
Humidity
Boost
for 3 seconds when:
• TIMER ON is set (if the unit is OFF, remains on when TIMER ON is set )
• FRESH, SWING, TURBO, ECO, BREEZE AWAY, ECO INTELLIGENT EYE
or SILENCE feature is turned on
• FRESH, SWING, TURBO, ECO, BREEZE AWAY, ECO INTELLIGENT EYE
or SILENCE feature is turned o

6 Specifications subject to change without notice. 40MAHB-01SI
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and unit service. Fig. 5 — on page 7 for the minimum required distances between the unit and walls or
ceilings.
Table 4 — Indoor Unit Pipe Sizes
WIRING
All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes. See the rating plate and/
or the installation instructions of the compatible outdoor unit for MCA
(minimum circuit amps) and MOCP (maximum over current
protection) to correctly size the wires and the disconnect fuse or
breakers respectively.
Recommended Connection Method for Power and
Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied 14/
3 power/communication wiring from the outdoor unit to the indoor
unit consists of four (4) wires and provides the power for the indoor
unit. Two wires are high voltage AC power, one is communication
wiring and the other is a ground wire. Wiring between the indoor and
outdoor unit is polarity sensitive. The use of BX wire is NOT
recommended.
If installed in a high Electromagnetic field (EMF) area and
communication issues exists, a 14/2 stranded shielded wire can be
used to replace L2/N and (S) between outdoor unit and indoor unit
landing the shield onto ground in the outdoor unit only.
NOTE: The main power is supplied to the outdoor unit. When
disconnecting the power of the outdoor unit, the indoor unit
would lose power. A disconnect switch is not required on the
Indoor unit side on the wiring between the Outdoor and Indoor
unit. A 3 pole disconnect may be used for extra protection
between the Indoor and Outdoor Unit.
UNIT SIZES 12K
(115V)
9K
(208/230V)
12K
(208/230V)
18K
(208/230V)
24K
(208/230V)
30K
(208/230V)
36K
(208/230V)
GAS PIPE in 0.5 0.375 0.5 0.5 0.626 0.626 0.626
(mm) 12.7 (9.52) 12.7 12.7 15.9 15.9 15.9
LIQUID PIPE in 0.25 0.25 0.25 0.25 0.375 0.375 0.375
(mm) 25 25 25 25 9.52 9.52 9.52
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Wires should be sized based on NEC and local codes.
WA R N I N G
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Be sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
Every wire must be connected firmly. Loose wiring may
cause the terminal to overheat or result in unit malfunction. A
fire hazard may also exist. Ensure all wiring is tightly
connected.
No wire should touch the refrigerant tubing, compressor or
any moving parts.
Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
Connecting cable with conduit shall be routed through the
hole in the conduit panel.
CAUTION

40MAHB-01SI Specifications subject to change without notice. 7
DIMENSIONS
Fig. 4 — Dimensions
Table 5 — Dimensions
CLEARANCES
Fig. 5 — Unit Clearances
NOTE: The top clearance recommended for proper return airflow is 5.9in (15cm). Reduction of this clearance may
decrease unit performance. This may be reduced to 3.2in (80mm) as long as the right and left clearances are
achieved.
HIGH WALL UNIT SIZE 12K 9K 12K 18K 24K 30K 36K
(Voltage) (115V) (208/230V) (208/230V) (208/230V) (208/230V) (208/230V) (208/230V)
DIMENSIONS
Height (H) In (mm) 11.61 (295) 11.61 (295) 11.61 (295) 12.56 (319) 14.57 (370) 14.57 (370) 14.57 (370)
Width (W) In (mm) 31.3 (795) 31.3 (795) 31.3 (795) 37.99 (965) 44.88 (1140) 44.88 (1140) 44.88 (1140)
Depth (D) In (mm) 8.86 (225) 8.86 (225) 8.86 (225) 9.41 (239) 10.83 (275) 10.83 (275) 10.83 (275)
PACKING
Height (H) In (mm) 12.01 (305) 12.01 (305) 12.01 (305) 12.80 (325) 13.98 (355) 13.98 (355) 13.98 (355)
Width (W) In (mm) 34.25 (870) 34.25 (870) 34.25 (870) 41.14 (1045) 48.43 (1230) 48.43 (1230) 48.43 (1230)
Depth (D) In (mm) 14.57 (370) 14.57 (370) 14.57 (370) 15.75 (400) 17.91 (455) 17.91 (455) 17.91 (455)
Thickness In (mm) 0.295 (7.5) 0.295 (7.5) 0.295 (7.5) 0.295 (7.5) 0.295 (7.5) 0.295 (7.5) 0.295 (7.5)
Weight - Gross lbs. (kg) 29.10 (13.2) 28.88 (13.1) 28.88 (13.1) 35.71 (16.2) 54.89 (24.9) 54.89 (24.9) 54.89 (24.9)
Weight - Net lbs. (kg) 22.93 (10.4) 22.71(10.3) 22.71(10.3) 27.12 (12.3) 43.65 (19.8) 43.65 (19.8) 43.65 (19.8)
6 in )
min.
5
in
(127mm)
min.
6 ft
5 in
(127mm)
min.
(1.8m)
CEILING
FLOOR
(152mm

8 Specifications subject to change without notice. 40MAHB-01SI
PRIOR TO INSTALLATION
Before installing the indoor unit, ensure the compatibility with the
outdoor unit using the product data as a reference. It is also necessary
to confirm the proper application of the equipment and to perform a
heat load calculation for proper sizing.
Step 1 - Check Equipment
Unpack the unit and move to the final location. Remove the carton,
taking care not to damage the unit. Inspect the equipment for damage
prior to installation. File a claim with the shipping company if the
shipment is damaged or incomplete. Locate the unit rating plate,
which contains the proper installation information. Check the rating
plate to be sure the unit matches the job specifications.
The indoor unit should be installed in a location that meets the
following requirements:
• Enough room for installation and maintenance
• Enough room for the lineset and drainpipe
• A horizontal ceiling and a structure that can sustain the weight of
the indoor unit
• The air inlet and outlet are not impeded
Step 2 - Select the Installation Location
Before installing the indoor unit, choose an appropriate location.
The following are standards that should help you choose an
appropriate location for the unit.
Fig. 6 — Select installation location
Proper installation locations must meet the following standards:
1. Good air circulation
2. Convenient drainage
3. Noise from the unit will not disturb others
4. Firm and solid—the location will not vibrate
5. A location at least 3.28 ft. (1m) from all other electrical devices
(e.g., TV, radio, computer)
6. DO NOT install the unit in the following locations:
a. Near any source of heat, steam, or combustible gas
b. Near flammable items such as curtains or clothing
c. Near any obstacle that might block air circulation
d. Near the doorway
e. In a location subject to direct sunlight
NOTE: When selecting a location leave ample room for a wall
hole (refer to the drill wall hole for connective piping step) for the
signal cable and refrigerant piping that connect the indoor and
outdoor units. The default position for all piping is the right side
of the indoor unit (while facing the unit). However, the unit can
accommodate piping to either left or right.
DO NOT install the unit in the following locations:
• Areas with oil drilling or fracking
• Coastal areas with high salt content in the air
• Areas with caustic gases in the air, such as near hot springs
• Areas with power fluctuations, such as factories
• Enclosed spaces, such as cabinets
• Areas with strong electromagnetic waves
• Areas that store flammable materials or gas
• Rooms with high humidity, such as bathrooms or laundry rooms.
CAUTION
PRODUCT INSTALLATION
• Installation must be performed by an authorized dealer or specialist.
A defective installation can cause water leakage, electrical shock, or
fire.
• The installation must be performed according to the installation
instructions. Improper installation can cause water leakage, electrical
shock, or fire. (In North America, installation must be performed in
accordance with the requirements of NEC or CEC by authorized
personnel only.)
• Contact an authorized service technician for repair or maintenance of
this unit. This appliance must be installed in accordance with local
codes.
• Only use the included accessories, parts, and specified parts for
installation. Using non-standard parts can cause water leakage,
electrical shock, fire, or unit failure.
• Install drainage piping according to the instructions in this manual.
Improper drainage may cause water damage to your home and
property.
• For units that have an auxiliary electric heater, DO NOT install the
unit within 3 feet (1 meter) of any combustible materials.
•DO NOT install the unit in a location that may be exposed to
combustible gas leaks. If combustible gas accumulates around the
unit, it may cause a fire.
•DO NOT turn on the power until all work has been completed.
• When moving or relocating the system, consult experienced service
technicians for the disconnection and re-installation of the unit.
WA R N I N G
6ft. (1.8m)
4.75in
12cm
5.9in (15cm)
4.75in
12cm

40MAHB-01SI Specifications subject to change without notice. 9
Step 3 - Attach the Mounting Plate to the
Wall
Use the following steps to attach the mounting plate to the wall.
1. Carefully remove the mounting plate, which is attached to the back
of the indoor unit.
2. The mounting plate should be located horizontally and level on the
wall. All minimum spacings should be maintained.
3. If the wall is block, brick, concrete or similar material, drill 0.2in (5
mm) diameter holes and insert anchors for the appropriate
mounting screws.
4. Attach the mounting plate.
Fig. 7 — Attach the mounting plate
5. Drill holes in the wall:
Fig. 8 — Drill holes in wall
a. If the wall is brick, concrete or of similar material, drill a
5mm-diameter (0.2in-diameter) hole into the wall and
insert the sleeve anchors provided.
b. Next, secure the mounting plate to the wall by tightening
the screws directly into the clip anchors.
Step 4 - Drill Wall Holes for Connective Piping
1. Determine the location of the wall hole based on the position of the
mounting plate. Refer to the Mounting Plate Dimensions.
2. Use a 2.5in (65mm) or 3.54in (90mm) (depending on models) core
drill to drill a hole in the wall. Make sure that the hole is drilled at a
slightly downward angle so the outdoor end of the hole is lower
than the indoor end by about 0.2 - 0.275in (5 - 7mm). This ensures
proper water drainage.
3. Place the protective wall cuff in the hole. This protects the edges of
the hole and helps to seal it once the installation is complete.
Mounting Plate Dimensions
Different model sizes have different mounting plates. Ensure there is
enough room to mount the indoor unit (refer to Figures 11−14). The
following measurements can be located on these figures:
•Width of mounting plate
•Height of mounting plate
•Width of indoor unit relative to plate
•Height of indoor unit relative to plate
•Recommended position of wall hole (both to the left and right of
mounting plate)
•Relative distances between screw holes.
Fig. 9 — Mounting Plate Orientation
Fig. 10 — Type A and Type B
Fig. 11 —Model A
Drill Holes in Wall
Type A
Type B
Left rear wall
hole 2.5 in (65mm)
Right rear wall hole
2.5in (65mm)
Indoor unit
outline
11.2in(285mm)
Model A
5.8in(148mm)
28in(715mm)
5.1in(130mm)
9.3in(237mm)
15.8in(402mm)
4.1in(103mm)
1.7in(45mm)
4.2in(107mm)
1.85in 47(mm) 1.5in
39(mm)
1.85in 47(mm)
1.5in 39(mm)

10 Specifications subject to change without notice. 40MAHB-01SI
Fig. 12 — Model B
Fig. 13 — Model C
Fig. 14 — Model D
NOTE: When the gas side connective pipe is 5/8in (16mmΦ) or
more, the wall hole should be 3.54in (90mm).
DRILL A HOLE IN WALL FOR THE
INTERCONNECTING PIPING, DRAIN AND WIRING
Refrigerant Line Routing
The refrigerant lines may be routed in any of the four directions. For
maximum serviceability, it is recommended to have refrigerant line
flare connections and the drain connections on the outside of the wall
that the fan coil can be mounted on. If piping is going through the
back, determine the pipe hole position using the mounting plate as a
template. Drill pipe hole diameter per values given in figures 11
through 14. The outside pipe hole is 1/2−in. (13 mm) min. lower than
the inside pipe hole, so it slants slightly downward.
Step 4 - Prepare Refrigerant Piping
The refrigerant piping is inside an insulating sleeve attached to the
back of the unit. The installer must prepare the piping before passing
it through the hole in the wall.
1. Based on the position of the wall hole relative to the mounting
plate, choose the side from which the piping exits the unit.
2. If the wall hole is behind the unit, keep the knock-out panel in
place. If the wall hole is to the side of the indoor unit, remove the
plastic knock-out panel from that side of the unit. This creates a slot
through which your piping can exit the unit. Use needle nose pliers
if the plastic panel is too difficult to remove by hand.
Fig. 15 — Knock-out Panel
3. If the existing connective piping is already embedded in the wall,
proceed directly to “Step 5 - Connect the Drain Hose”. If there is no
embedded piping, connect the indoor unit’s refrigerant piping to the
connective piping that connects the indoor and outdoor units.
NOTE: Refrigerant piping can exit the indoor unit from four
different angles; left-hand side, right-hand side, left rear, right
rear.
Fig. 16 — Piping Angles
Model B
9.1in (230mm) 9.7in(246mm)
31.7in(805mm)
16.2in(411mm)
Left rear wall
hole 2.5in (65mm)
Right rear wall hole
2.5in(65mm)
Indoor unit
outline
1.5in (39mm)
285mm (11.2in)
1.85in (47mm)
1.7in(45mm)
7.3in(185mm) 5.5in(139mm) 4.2in(107mm)
1.5in (39mm)
1.85in (47mm)
Left rear wall
hole 2.5 in (65mm)
Right rear wall hole
2.5in(65mm)
Indoor unit
outline
11.88in(302mm)
1.4in (36mmn)
1.85in (47mm)
11.2in(285mm) 9.57in(243mm)
9.5in(240mm)
37.7in(958.3mm)
18in(458mm)
1.7in(45mm)
5.6in(143mm)
3.9in(100mm)
1.85in (47mm)
1.4in (36mmn)
Left rear wall
hole 2.5in(65mm)
Right rear wall hole
2.5in(65mm)
12.79in(324.9mm)
2.16in (55mm)
10.4in(264mm)
40.85in(1037.6mm)
8.6in(219mm)
13.5in(344mm)
11.8in(299mm)
1.77in(45mm)
1.77in(45mm)
22in(559mm)
1.85 in (47mm)
2.16in (55mm)
1.85 in (47mm)
Knock-out Panel
Be extremely careful not to dent or damage the piping while
bending them away from the unit. Any dents in the piping will
affect the unit’s performance.
CAUTION

40MAHB-01SI Specifications subject to change without notice. 11
Step 5 - Connect the Drain Hose
By default, the drain hose is attached to the left-hand side of the unit
(when you are facing the back of the unit). However, it can also be
attached to the right-hand side. To ensure proper drainage, attach the
drain hose on the same side that your refrigerant piping exits the unit.
Attach a drain hose extension (purchased separately) to the end of
drain hose.
• Wrap the connection point firmly with Teflontape to ensure a
good seal and to prevent leaks.
• For the portion of the drain hose that remains indoors, wrap it with
foam pipe insulation to prevent condensation.
• Remove the air filter and pour a small amount of water into the
drain pan to ensure that water flows smoothly from the unit.
NOTE: Be sure to arrange the drain hose according to Figure 17.
Fig. 17 — Drain Hose Placement
Plug the Unused Drain Hole
To prevent unwanted leaks, plug the unused drain hole with the rubber
plug provided.
Fig. 18 —Plug the Unused Drain Hole
CORRECT
NOT CORRECT
NOT CORRECT
NOT CORRECT
Ensure there are no kinks
or dents in the drain hose
to ensure proper drainage.
Ensure there are no kinks
or dents in the drain hose
to ensure proper drainage.
Kinks in the drain hose
create water traps.
Do not place the end of the
drain hose in water or in
containers that collect water.
This prevents proper drainage.
All wiring must comply with local and national electrical codes,
regulations and must be installed by a licensed electrician. All
electrical connections must be made according to the Electrical
Connection Diagram located on the panels of the indoor and
outdoor units.
If there is a serious safety issue with the power supply, stop work
immediately. Explain your reasoning to the client, and refuse to
install the unit until the safety issue is properly resolved.
Power voltage should be within 90-110% of rated voltage.
Insufficient power supply can cause malfunction, electrical shock,
or fire.
If connecting power to fixed wiring, a surge protector and main
power switch should be installed. If connecting power to fixed
wiring, a switch or circuit breaker that disconnects all poles and
has a contact separation of at least 1/8in (3mm) must be
incorporated in the fixed wiring.
The qualified technician must use an approved circuit breaker or
switch. Only connect the unit to an individual branch circuit
outlet. Do not connect another appliance to that outlet.
Properly ground the air conditioner.
Every wire must be firmly connected. Loose wiring can cause the
terminal to overheat, resulting in product malfunction and possible
fire. Do not let wires touch or rest against refrigerant tubing, the
compressor, or any moving parts within the unit.
To avoid getting an electric shock, never touch the electrical
components soon after the power supply has been turned off. After
turning off the power, always wait 10 minutes or more before you
touch the electrical components.
CAUTION
Before performing any electrical or wiring work, turn off the main
power to the system.
WA R N I N G

12 Specifications subject to change without notice. 40MAHB-01SI
Step 6 - Connect the Signal and Power
Cables
All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes. See the rating plate and/
or the installation instructions of the compatible outdoor unit for MCA
(minimum circuit amps) and MOCP (maximum over current
protection) to correctly size the wires and the disconnect fuse or
breakers respectively.
Recommended Connection Method for Power and
Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied 14/
3 power/communication wiring from the outdoor unit to the indoor
unit consists of four (4) wires and provides the power for the indoor
unit. Two wires are high voltage AC power, one is communication
wiring and the other is a ground wire. Wiring between the indoor and
outdoor unit is polarity sensitive. The use of BX wire is NOT
recommended. If installed in a high Electromagnetic field (EMF) area
and communication issues exists, a 14/2 stranded shielded wire can be
used to replace L2/N and (S) between outdoor unit and indoor unit
landing the shield onto ground in the outdoor unit only.
1. Open front panel of the indoor unit.
2. Use a screwdriver to open the wire box cover on the right side of
the unit. This reveals the terminal block.
Fig. 19 — Wire Box Cover
3. Unscrew the cable clamp, below the terminal block, and place it to
the side.
4. Facing the back of the unit, remove the plastic panel on the bottom
left-hand side.
5. Feed the signal wire through this slot, from the back of the unit to
the front.
6. Facing the front of the unit, connect the wire according to the
indoor wiring diagram, connect the u-lug and firmly screw each
wire to its corresponding terminal.
7. After checking to ensure every connection is secure, use the cable
clamp to fasten the signal cable to the unit. Screw the cable clamp
down tightly.
8. Replace the wire cover on the front of the unit, and the plastic panel
on the back.
NOTE: The wiring connection process may differ slightly between
units and regions.
Terminal block
Wire cover
Screw
Cable clamp
All wiring must be performed strictly in accordance with the
wiring diagram located on the back of indoor unit’s front panel.
WAR N I NG
DO NOT MIX UP LIVE AND NULL WIRES
This is dangerous and can cause the air conditioning unit to
malfunction.
CAUTION

40MAHB-01SI Specifications subject to change without notice. 13
Step 7 - Wrap Piping and Cables
Before passing the piping, drain hose, and the signal cable through the
wall hole, bundle them together to save space, protect them, and
insulate them (not applicable in North America).
1. Bundle the drain hose, refrigerant pipes, and signal cable.
Fig. 20 — Bundle the drain hose
NOTE: Ensure the drain hose is at the bottom of the bundle.
Placing the drain hose at the top of the bundle can cause the drain
pan to overflow, which can lead to fire or water damage.
NOTE: While bundling these items together, do not intertwine or
cross the signal cable with any other wiring.
2. Using adhesive vinyl tape, attach the drain hose to the underside of
the refrigerant pipes.
3. Using insulation tape, wrap the signal wire, refrigerant pipes, and
drain hose tightly together. Double-check that all items are bundled.
NOTE: When wrapping the bundle, keep the ends of the piping
unwrapped. Technicians may need to access them to test for leaks
at the end of the installation process (refer to the Electrical
Checks and Leak Checks section).
Step 8 - Mount the Indoor Unit
If new connected piping to the outdoor unit has been installed,
complete the following steps:
1. If you have already passed the refrigerant piping through the hole in
the wall, proceed to step 4.
2. Otherwise, double-check that the ends of the refrigerant pipes are
sealed to prevent dirt or foreign materials from entering the pipes.
3. Slowly pass the wrapped bundle of refrigerant pipes, drain hose,
and signal wire through the hole in the wall.
4. Hook the top of the indoor unit on the upper hook of the mounting
plate.
5. Ensure the unit is hooked firmly on the mounting by applying slight
pressure to the left and right-hand sides of the unit. The unit should
not jiggle or shift.
6. Using even pressure, push down on the bottom half of the unit.
Keep pushing down until the unit snaps onto the hooks along the
bottom of the mounting plate.
7. Again, check that the unit is firmly mounted by applying slight
pressure to the left and the right-hand sides of the unit.
If refrigerant piping is already embedded in the wall, complete the
following steps:
1. Hook the top of the indoor unit on the upper hook of the mounting
plate.
2. Use a bracket or wedge to prop up the unit, allowing enough room
to connect the refrigerant piping, signal cable, and the drain hose.
Fig. 21 — Wedge to prop the unit
3. Connect the drain hose and refrigerant piping.
4. Keep the pipe connection point exposed to perform the leak test
(refer to Electrical Checks and Leak Checks section of this
manual).
5. After the leak test, wrap the connection point with insulation tape.
6. Remove the bracket or wedge that is propping up the unit.
7. Using even pressure, push down on the bottom half of the unit.
Keep pushing down until the unit snaps onto the hooks along the
bottom of the mounting plate.
NOTE: Keep in mind that the hooks on the mounting plate are
smaller than the holes on the back of the unit. If you find that you
do not have ample room to connect embedded pipes to the indoor
unit, the unit can be adjusted left or right by about 1.18-1.95in
(30-50mm), depending on the model.
Fig. 22 — Move to the left or right
Indoor Unit
Space behind unit
Refrigerant piping
Drain hose
Signal wire
Insulation tape
Move to the left or right
(30-50mm)
1.2-1.95in
(30-50mm)
1.2-1.95in

14 Specifications subject to change without notice. 40MAHB-01SI
ELECTRICAL DATA
Table 6 — Electrical Data
CONNECTION DIAGRAMS
Fig. 23 — Connection Diagram 12K (115V)
Fig. 24 — Connection Diagram 9K - 18K (208/230V)
Fig. 25 — Connection Diagram 24K - 36K (208/230V)
HIGH WALL
INDOOR UNITS HP
12K
(115V)
9K
(208/230V)
12K
(208/230V)
18K
(208/230V)
24K
(208/230V)
30K
(208/230V)
36K
(208/230V)
Running Current (A) 0.467 0.182 0.182 0.11 0.364 0.364 0.364
Power Consumption (W) 20 20 20 30 58 58 58
Power Factor (%) 81.54 65.9 95.2 70.2 94 96.5 98.7

40MAHB-01SI Specifications subject to change without notice. 15
INSTALL ALL POWER,
INTERCONNECTING WIRING, AND PIPING
TO THE INDOOR UNIT
1. Run interconnecting piping and wiring from the outdoor unit to the
indoor unit.
2. Run an interconnecting cable through the hole in wall (outside to
inside).
3. Lift the indoor unit into position and route piping and drain through
the hole in wall (inside to outside). Fit the interconnecting wiring
into the back side of the indoor unit.
4. Put an upper claw at the back of the indoor unit on the upper hook
of the mounting plate and move the indoor unit from side to side to
ensure it is securely hooked. See “Mounting Plate Dimensions” and
Fig. 9 — on page 9 for reference.
5. Open the indoor unit’s front cover and remove the field wiring
terminal block cover.
6. Pull the interconnecting wire up from the back of indoor unit and
position close to the terminal block on the indoor unit.
7. Push the lower part of the indoor unit up on the wall, then move the
indoor unit from side to side, up and down to ensure it is hooked
securely (see Fig. 26).
Fig. 26 — Indoor Unit Installation
8. Connect the wiring from the outdoor unit per the connection
diagram (see Fig. 23 and Fig. 24).
9. Replace the field wiring cover and close the indoor unit’s front
cover.
10. Piping:
a. Cut the pipe, with a pipe cutter, at 90 degrees (see Fig. 27).
b. Remove the service connection (if provided with the unit).
Fig. 27 — Pipe Cutting
c. Remove all the burrs from the cut cross section of the pipe
avoiding any burrs inside the tubes.
d. Remove the flare nuts attached to the indoor and outdoor
units.
e. Install the correct size flare nut onto the tubing and make
the flare connection. Refer to Table 7 for the flare nut
spaces.
Table 7 — Flare Nut Spacing
Fig. 28 — Flare Nut Spacing
f. Apply a small amount of refrigerant oil to the flare
connection on the tubing.
g. Align the center of the pipes and/or service valve.
Fig. 29 — Align Pipe Center
h. Connect both the liquid and gas piping to the indoor unit
i. Tighten the flare nut using a torque wrench as specified in
Table 8.
Table 8 — Tightening Torque
Fig. 30 — Tighten the Flare Nut
Upper hook
Lower hoo
k
Oblique
90 Roughness
Burr
OUTER DIAM. (MM) A (MM)
MAX. MIN.
Ø 1/4” (6.35) 0.05 (1.3) 0.03 (0.7)
Ø 3/8” (9.52) 0.06 (1.6) 0.04 (1.0)
Ø 1/2” (12.7) 0.07 (1.8) 0.04 (1.0)
Ø 5/8” (15.88) 0.09 (2.2) 0.08 (2.0)
Brass Flare
Size
Recommended Seating Torque
for Brass Flare Nuts N-m
Ø1/4 8-10 Ft. - Lbs. 10.8 to 13.6
Ø3/8 15-18 Ft. - Lbs. 20.3 to 24.4
Ø1/2 28-32 Ft. - Lbs. 38.0 to 43.4
Ø5/8 38-42 Ft. - Lbs. 51.5 to 56.9
Ø3/4 50-55 Ft. - Lbs. 68.0 to 74.6
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Indoor unit tubing Flare nut Piping
Flare nut
Coppe
r tube

16 Specifications subject to change without notice. 40MAHB-01SI
FINAL TUBING CHECK
IMPORTANT: Ensure the certain factory tubing on the indoor unit
has not shifted during shipment. Ensure the tubes are not rubbing
against each other or any sheet metal. Pay close attention to feeder
tubes and ensure the wire ties on the feeder tubes are secure and tight.
DRAIN CONNECTIONS
Connect the drain line. The drain line must not have a trap anywhere
in its length, must pitch downwards, and must be insulated up to the
outside wall (see Fig. 31). By default, the drain hose is attached to the
left-hand side of unit (when facing the back of the unit). However, it
can also be attached to the right-hand side.
a. To ensure proper drainage, attach the drain hose on the
same side that your refrigerant piping exits the unit.
b. Attach a drain hose extension (purchased separately) to the
end of the drain hose.
c. Wrap the connection point firmly with Teflon tape to
ensure a good seal and to prevent leaks.
d. For the portion of the drain hose that remains indoors, wrap
it with foam pipe insulation to prevent condensation.
e. Remove the air filter and pour a small amount of water into
the drain pan to ensure that water flows from the unit
smoothly.
Plug the Unused Drain Hole
To prevent unwanted leaks, plug the unused drain hole with the rubber
plug provided.
Fig. 31 — Proper Drain Hose Installation
NOTE: For proper orientation of the refrigerant piping, electrical
cable and drain lines, refer to Fig. 32.
Fig. 32 — Bundle drain hose, refrigerant pipes, and
signal cable
NOTE: The factory insulation provided with the product is
sufficient, therefore adding additional insulation to the
refrigerant pipes is NOT recommended. Additional
insulation may keep the product from attaching flush to
the wall.
NOTE: For applications where gravity cannot be used for
drainage, a condensate pump accessory is available.
Consult the condensate pump Installation Instructions
for more information.
WIRELESS REMOTE CONTROL
INSTALLATION
Fig. 33 — Wireless Remote Controller
1. Use the two screws supplied with the wireless remote control to
attach the mounting bracket to the wall in a location selected by the
customer and within operating range.
2. Install the batteries in the remote control.
3. Place the remote control into the remote control mounting bracket.
NOTE: For remote control operation, refer to the remote
control’s owners manual.
retawotnidneniardtuptonoDreporP Do not form a rise
Indoor Unit
Space behind unit
Refrigerant piping
Drain hose
Signal wire
Insulation tape
Humidity
Boost

40MAHB-01SI Specifications subject to change without notice. 17
WIRED REMOTE CONTROL
INSTALLATION
The wired remote controller comes with the following items:
• A set of installation instructions and owner's manuals
• 3 M4X20 Screws to mount on the wall
• 4 wall plugs to mount on the wall
• 2 M4X25 to mount on switch box
• 2 plastic screw bars to fix on switch box
• 1 set of batteries
• 1 set of connecting wires to connect to indoor unit’s main board
Fig. 34 — Wired Controller
To connect the wired remote controller to the indoor units, connect to
the 4-pin connector located on the display board.
To connect the wired remote controller to the indoor units:
1. Replace the display board with the shipped with the kit.
2. Install the adapter board (shipped with the kit).
3. Connect the adapter board to the new display board. Follow the
instructions on the wired controller installation instructions manual
for more details.
4. Connect the female molex plug on the adapter board to the male
molex plug from the extension cable shipped with the kit.
5. Connect the extension cable to the wired controller
For setup instructions, refer to the controller installation manual.
START-UP
Test Operation
Perform a test operation after completing a gas leak and electrical
safety check (see Fig. 35).
Fig. 35 — Test Operation
1. Push ON/OFF on the remote control to begin testing.
NOTE: A protection feature prevents the air conditioner
from activating for approximately 3 to 4 minutes.
2. Push MODE, select COOLING, HEATING, FAN mode to check
that all functions work correctly.
3. To run the test using the MANUAL button on the indoor unit:
a. Open the front panel of the indoor unit;
b. Push MANUAL once to energize the unit. The set
conditions for manual operation are as follows:
•Preset set point: 76F (24C)
•Fan speed: AUTO
•Discharge air direction: Pre-set position based on operation
in the COOL or HEAT mode.
4. Set the MANUAL button to OFF (by pushing it twice again) after
completing the test operation.
Manua
l control
button
AUTO/COOL

18 Specifications subject to change without notice. 40MAHB-01SI
SYSTEM CHECKS
1. Conceal the tubing where possible.
2. Ensure the drain tube slopes downward along its entire length.
3. Ensure all tubing and connections are properly insulated.
4. Fasten tubes to the outside wall, when possible.
5. Seal the hole through which the cables and tubing pass.
INDOOR UNIT
1. Do all remote control buttons function properly?
2. Do the display panel lights work properly?
3. Does the air deflection louver function properly?
4. Does the drain work?
Explain Following Items To Customer (with the aid of the
Owner’s Manual):
1. How to turn the air conditioner on and off; selecting COOLING,
HEATING and other operating modes; setting a desired
temperature; setting the timer to automatically start and stop the air
conditioner operation; and all other features of the remote control
and display panel.
2. How to remove and clean the air filter.
3. How to set the air deflection louver.
4. Explain care and maintenance.
5. Present the owner’s manual and installation instructions to
customer.

40MAHB-01SI Specifications subject to change without notice. 19
TROUBLESHOOTING
For ease of service, the systems are equipped with diagnostic code display LEDs on both the indoor and outdoor units. The indoor
diagnostic display is a combination of flashing LEDs on the display panel or the front of the unit.
Some indoor units display error codes specifying failure modes in the outdoor units. If possible, always check the diagnostic codes displayed on
the indoor unit first.
The diagnostic codes displayed in the indoor and outdoor units are listed in Table 9.
INDOOR UNIT DIAGNOSTIC GUIDES
Table 9 — Indoor Unit Diagnostic Codes
O (on −light) X (off −light) ☆(flash)
For additional diagnostic information, refer to the service manual.
OPERATION LAMP (TIMES) TIMER LAMP DISPLAY ERROR INFORMATION
☆1 OFF EH 00/EH 0A Indoor unit EEPROM parameter error
☆2 OFF EL 01 Indoor/outdoor unit communication error
☆3 OFF EH 02 Zero-crossing signal detection error
☆4 OFF EH 03 Indoor fan operating outside of the normal range
☆5 OFF EC 51 Outdoor unit EEPROM parameter error
☆5 OFF EC 52 T3 is in open circuit or has short circuited
☆5 OFF EC 53 T4 is in open circuit or has short circuited
☆5 OFF EC 54 TP is in open circuit or has short circuited
☆5 OFF EC 56 T2B is in open circuit or has short circuited
☆6 OFF EH 60 T1 is in open circuit or has short circuited
☆6 OFF EH 61 T2 is in open circuit or has short circuited
☆12 OFF EC 07 Outdoor fan operating outside of the normal range
☆9 OFF EH 0b Indoor PCB/Display board communication error
☆8 OFF EL 0C Refrigerant leakage detection
☆7 FLASH PC 00 IPM malfunction or IGBT OSCP
☆2 FLASH PC 01 Over voltage or over low voltage protection
☆3 FLASH PC 02 Compressor or IPM high temp/pressure protection
☆5 FLASH PC 04 Inverter compressor drive error
☆1 FLASH PC 08 Current overload protection
☆6 FLASH PC 40 Communication error between outdoor chip and compressor chip
☆7 FLASH PC 03 Low pressure protection
☆1 ON -- Indoor unit mode conflict
☆9 OFF EH b1 Indoor board and Multi-function communication error
☆11 OFF FH 0d Ionizer malfunction

20 Specifications subject to change without notice. 40MAHB-01SI
INDOOR UNIT FUNCTIONAL CODES
Table 10 — Indoor Unit Functional Codes
DISPLAY DESCRIPTION
dF Defrost
SC Self clean
CL Filter cleaning reminder
CL Active Clean (*model dependent)
nF Filter replacement reminder
FP Heating in room temperature under 8°C
FC Forced cooling
AP AP mode of WIFI connection
CP Remote switched off
LL Remote or Wire controller Lock
On Time On
Off Time Off
E-C-O ECO mode
SD Power abnormal detection
d1 Receive DR1 signal
d2 Receive DR2 signal
d3 Receive DR3 signal
dE DR input error signal
FH 0P AP mode is activated / no WIFI kit installed
FH 0d See outdoor unit for Error Code information
EH/EC/EL/PC See outdoor unit for Error Code information