Carrier 40VMV0012A User manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
© 2022 Carrier. All rights reserved. Edition Date: 04/22 Form No: 40VM-6SI
A Carrier Company Printed in U.S.A. Replaces: 40VM-5SI
1
Installation and Maintenance Instructions
CONTENTS Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIMENSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 1 — Unpack and Inspect Units . . . . . . . . . . . . . . 5
Step 2 — Position the Unit . . . . . . . . . . . . . . . . . . . . . . 5
Step 3 — Install Ductwork. . . . . . . . . . . . . . . . . . . . . . . 6
Step 4 — Connect Piping . . . . . . . . . . . . . . . . . . . . . . . 6
Step 5 — Complete Electrical Connections . . . . . . . . 7
Step 6 — Position and Connect Controller . . . . . . . . . 7
ACB (Auxiliary Control Board) Interface . . . . . . . 12
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pre-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
System Operation Check . . . . . . . . . . . . . . . . . . . . . . 12
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INDOOR UNIT ADDRESSING . . . . . . . . . . . . . . . . 12
Wireless Remote Controller (40VM900001) . . . . . . 12
Non-Programmable Controller. . . . . . . . . . . . . . . . . 13
Programmable Controller . . . . . . . . . . . . . . . . . . . . . 13
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 14
APPENDIX A — DIP SWITCH SETTINGS . . . . . . . 16
APPENDIX B — NAMEPLATES. . . . . . . . . . . . . . . 17
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . 17
APPENDIX C — FAN CURVES . . . . . . . . . . . . . . . 19
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. The qualified installer or agency must use
factory authorized kits or accessories when modifying this
product.
Follow all safety codes. Wear safety glasses, protective
clothing, and work gloves. Use quenching cloth for brazing
operations. Have fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local
building codes and the current editions of the National
Electrical Code (NEC) ANSI/NFPA (American National
Standards Institute/National Fire Protection Association) 70.
For Canada, refer to the current editions of the Canadian
Electrical Code CSA (Canadian Standards Association) C22.1.
Understand the signal words — DANGER, WARNING, and
CAUTION. DANGER identifies the most serious hazards,
which will result in severe personal injury or death.
WARNING signifies hazards that could result in personal injury
or death. CAUTION is used to identify unsafe practices, which
could result in minor personal injury or product and property
damage.
Recognize safety information. This is the safety-alert
symbol ( ). When this symbol is displayed on the unit and in
instructions or manuals, be alert for the potential of personal
injury. Installing, starting up, and servicing the equipment can
be hazardous due to system pressure, electrical components,
and equipment location.
WARNING
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all
disconnect locations to alert others not to restore power
until work is completed.
WARNING
When installing the equipment in a small space, provide
adequate measures to avoid refrigerant concentration
exceeding safety limits due to refrigerant leak. In case of
refrigerant leak during installation, ventilate the space
immediately. Failure to follow this procedure may lead to
personal injury.
WARNING
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and
goggles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from
system using both high pressure and low
pressure ports.
c. Traces of vapor should be displaced with
nitrogen and the work area should be well
ventilated. Refrigerant in contact with an open
flame can produce toxic gases.
d. Cut component connection tubing with tubing
cutter and remove component from unit. Use a
pan to catch any oil that may come out of the
lines and as a gage for how much oil to add to
the system.
e. Carefully unsweat remaining tubing stubs
when necessary. Oil can ignite when exposed to
torch flame.
Failure to follow these procedures may result in personal
injury or death.
40VMV012A-054A
Vertical AHU Fan Coil for
Variable Refrigerant Flow (VRF) Systems

2
GENERAL
The 40VMV vertical AHU (air-handling unit) is equipped with
a DC motor. The unit features dual drain spouts so it can be
mounted vertically or horizontally, and is ideal for closet
applications. Through thermostatic control of operations,
conditions can be varied to suit diverse requirements and
activities.
The equipment is initially protected under the manufacturer’s
standard warranty; however, the warranty is provided under the
condition that the steps outlined in this manual for initial
inspection, proper installation, regular periodic maintenance,
and everyday operation of the unit be followed in detail. This
manual should be fully reviewed in advance before initial
installation, start-up, and any maintenance. Contact your local
sales representative or the factory with any questions BEFORE
proceeding.
Table 1 shows components that may or may not be used for a
particular installation. Table 2 lists physical data for each unit
size. See Fig. 1 for model number nomenclature. Fig. 2 shows
unit dimensions.
Fig. 1 —Model Number Nomenclature
Table 1 — Components Shipped With Unit
CAUTION
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes
and regulations. DO NOT leave refrigerant system open to
air any longer than the actual time required to service the
equipment. Seal circuits being serviced and charge with
dry nitrogen to prevent oil contamination when timely
repairs cannot be completed. Failure to follow these
procedures may result in damage to equipment. For
information about replacement oil type and viscosity, see
the Installation, Start-Up, and Service Instructions for the
38VMAH and 38VMAR outdoor units.
NAME SHAPE QUANTITY FUNCTION
Copper pipes 2 Reducer for smaller pipe diameter (only for size 018 unit).
Drain plug 2 Plug for drain pan outlet
Wire grommet 2 For wire routing
Tie rope 3 ————————————————————
Screw 4 ————————————————————
PQ connection wire 2 To connect the outdoor unit, indoor unit and sub MDC.
Connecting wire 1 For occupancy sensor
No Beep Harness 1 Prevent beeping noise
LEGEND
MDC — Multiport Distribution Controller
Equipment Type
40
—Indoor Fan Unit Coil
Voltage (V-Ph-Hz)
V
M— VRF
P
roduct Type
3 — 208/230-1-60
Blank
Model Type
V— Vertical AHU—
Capacity (Btuh)
012 — 12,000
018 — 18,000
024 — 24,000
030 — 30,000
036 — 36,000
048 — 48,000
40
054 — 48,000
VM V18 -- 3
A
A —
Design Revision
LEGEND
VRF — Variable Refrigerant Flow

3
Table 2 — 40VMV Physical Data
*Gross weight includes packaging.
UNIT 40VMV 012A 018A 024A 030A 036A 048A 054A
POWER SUPPLY (V-Ph-Hz) 208/230-1-60
COOLING CAPACITY (Btuh)
Total 12,000 18,000 24,000 30,000 36,000 48,000 53,500
Sensible 9,400 14,000 18,600 22,600 28,300 37,100 41,300
HEATING CAPACITY (Btuh) 13,500 21,000 27,000 34,000 40,000 54,000 60,000
INDOOR FAN MOTOR
Type DC Motor
Input (W) 43 60 100 151 187 355 466
INDOOR COIL
Number of Rows 23
Fin Spacing (fins/in.) 16 17
Fin Type Hydrophilic Aluminum
Tube Diameter, OD (in.) 0.276
Tube Type Inner Groove
Number of Circuits 4610
INDOOR AIRFLOW (cfm)
High 400 600 800 1000 1200 1600 1800
Medium 320 510 680 850 1020 1360 1530
Low 320 420 560 700 840 1120 1260
EXTERNAL STATIC PRESSURE (in. wg) 0.8
INDOOR UNIT NOISE LEVEL (dBA)
High 37.6 41.6 46.2 52.2 46.9 53.0 57.1
Medium 34.5 37.1 42.3 48.4 44.1 48.5 52.6
Low 34.5 34.4 37.9 44.4 39.3 43.8 47.9
UNIT
Unit Dimensions, W x H x D (in.) 19-5/8 x 46-1/2 x 20-5/8 22 x 54-1/2 x 24
Packing Dimensions, W x H x D (in.) 22-5/8 x 50-5/8 x 25-3/8 24-5/8 x 58-5/8 x 27-3/4
Net/Gross Weight (lb)* 115/139 119/143 157/183
FILTER
Dimensions, L x H x D (lbs.) 18 x 20 x 1 20 x 22 x 1
Qty 1
REFRIGERANT TYPE R-410A
THROTTLE EEV
DESIGN PRESSURE (psig) 580/320
REFRIGERANT PIPING (in.)
Liquid Side, OD 1/4 3/8
Gas Side, OD 1/2 5/8
CONNECTING WIRING (AWG)
Power Wiring Sized per NEC and local codes based on nameplate electrical data
Signal Wiring 2-core stranded shielded cable 18 AWG
CONDENSATE DRAIN PIPE DIAMETER, OD (in.) 3/4 NPT
LEGEND
AWG — American Wire Gage
EEV — Electronic Expansion Valve
NEC — National Electric Code

4
DIMENSIONS
NOTE: All dimensions shown in inches.
Fig. 2 —40VMV012A-054A Dimensions
40VMV UNIT SIZE A B C D
012A-030A 46-1/219-5/818 21-5/8
036A-054A 54-1/222 19-1/224
RIGHT SIDE
A
FRONT
B
CD
DRAIN
PIPE
LEFT SIDE
AIR RETURN
REFRIGERANT
SIDE)
PIPE (LIQUID
REFRIGERANT
PIPE (GAS SIDE)
AIR SUPPLY
10-5/16

5
INSTALLATION
Step 1 — Unpack and Inspect Units Units are
packaged for shipment to avoid damage during normal transit
and handling. It is the receiving party’s responsibility to inspect
the equipment upon arrival. Any obvious damage to the carton
and/or its contents should be reported on the bill of lading and a
claim should be filed with the transportation company and the
factory. Unit should always be stored in a dry place, and in the
proper orientation as marked on the carton.
After determining the condition of the carton exterior, carefully
remove each unit from the carton and inspect for hidden
damage. Check to make sure that items such as thermostats and
controllers are accounted for whether packaged separately or
shipped at a later date. Any hidden damage should be recorded,
a claim should be filed with the transportation company, and
the factory should be notified. If a claim for shipping damage is
filed, the unit, shipping carton, and all packing must be retained
for physical inspection by the transportation company. All units
should be stored in the factory shipping carton with internal
packaging in place until installation.
PROTECTING UNITS FROM DAMAGE Do not apply
force or pressure to the coil, piping, or drain stub-outs during
handling. All units should be handled by the chassis or as close
as possible to the unit mounting point locations.
The unit must always be properly supported. Temporary
supports used during installation or service must be adequate to
hold the unit securely. To maintain warranty, protect units
against hostile environments (such as rain, snow or extreme
temperature), theft, vandalism, and debris on jobsite.
Equipment covered in this manual is not suitable for outdoor
installations. Do not allow foreign material to fall into drain
pan. Prevent dust and debris from being deposited on motor,
fan wheels, and coils. Failure to do so may have serious
adverse effects on unit operation, and in the case of motor and
blower assembly, may result in immediate or premature failure.
Failure of any unit caused by deposits of foreign material on
the motor or blower wheels will not be covered by the
manufacturer’s warranty. Some units and/or job conditions
may require some form of temporary covering during
construction.
PREPARING JOBSITE FOR UNIT INSTALLATION To
save time and to reduce the possibility of costly errors, set up a
complete sample installation in a typical room at jobsite.
Check all critical dimensions such as pipe, wire, and duct
connections requirements. Refer to job drawings and product
dimension drawings as required. Instruct all trades in their
parts of the installation. Units must be installed in compliance
with all applicable local code requirements.
IDENTIFYING AND PREPARING UNITS Be sure power
requirements match available power source. Refer to unit
nameplate and wiring diagram. In addition:
• Check all tags on unit to determine if shipping screws are
to be removed. Remove screws as directed.
• Rotate the fan wheel by hand to ensure that the fan is
unrestricted and can rotate freely. Check for shipping
damage and fan obstructions. Adjust blower motor as
required.
• The condensate drain should have sufficient downward
slope (1 inch per 100 inches) in any horizontal run
between unit and drain
Step 2 — Position the Unit
Install the unit in a location that meets the following
requirements:
• Allow adequate space for installation, service
clearance, piping and electrical connections, and
necessary ductwork. For specific unit dimensions,
refer to Table 2, Fig. 2, and Fig. 3. Allow clearance
according to local and national codes.
• Unit can be installed standing vertically on the floor
or on a field-provided stand. If a stand is used, be
sure it can support the weight of the unit. Unit can
also be installed horizontally, either resting on the
floor or suspended from the ceiling. If suspended,
confirm that the ceiling is able to support the weight
of the unit. See Table 2 for nominal weight.
• If the unit is to be installed over a finished ceiling
and/or living area, building codes may require a
field-supplied secondary condensate drain pan to be
installed under the entire unit. Consult local codes
inspector for additional information.
Select the unit position with the following points in mind:
• The unit should be installed on a structure that is
suitable to support the total weight of the unit,
refrigerant piping, and condensate.
• Proper access should be provided for maintenance
for refrigerant piping, EEV (electronic expansion
valve), electrical box, and condensate pump. A 2-ft.
clearance is recommended all around the unit.
• The unit should not be positioned close to a wall or
similar obstruction or in a position where the
discharge air could blow directly on the thermostat.
See Fig. 3.
• The unit should not be positioned directly above any
obstruction.
• The unit must be installed square and level.
NOTE: All dimensions shown in inches.
Fig. 3 —Clearances
CAUTION
To avoid equipment damage, do not lift unit by the drain
pipe or refrigerant piping. Unit should be lifted using the
mounting brackets.
DANGER
Units must not be installed where they may be exposed to
potentially explosive or flammable atmosphere. If this
instruction is not followed exactly, a fire or explosion may
result, causing property damage, injury, or loss of life.
AIRFLOW
HORIZONTAL INSTALLATION
t39
3
/
8
t39
3
/
8
t39
3
/
8
t7
7
/
8
t7
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8
VERTICAL INSTALLATION

6
.
Step 3 — Install Ductwork
UPFLOW INSTALLATION If return air is to be ducted,
install duct flush to the floor. Only use the return-air opening
provided. All return air must pass through the coil.
HORIZONTAL INSTALLATIONS Be sure installation
complies with all applicable building codes, which may require
installation of a secondary condensate pan.
NOTE: To ensure proper drainage for horizontal installations,
unit must be installed so it is within 1/8-in. pitch of the length
and width of the unit.
1. Arrange support for unit by setting it in or above
secondary condensate pan.
2. When suspending unit from ceiling, dimples in casing
indicate proper location of screws for mounting metal
support straps.
DUCT CONNECTIONS Connect supply-air duct over
outside of 3/4-in. flange provided on supply-air opening. Secure
duct to flange with proper fasteners for type of duct used, and
seal duct-to-unit joint.
Duct connection flanges are provided at the discharge air unit
connection.
Use flexible connectors between ductwork and unit to prevent
transmission of vibration. Ductwork passing through
unconditioned space must be insulated and covered with vapor
barrier.
DUCTWORK ACOUSTICAL TREATMENT Metal
duct systems that do not have a 90 elbow and 10 feet of main
duct to first branch takeoff may require internal acoustical
insulation lining.
As an alternative, fibrous ductwork may be used if constructed
and installed in accordance with the latest edition of SMACNA
(Sheet Metal and Air-Conditioning Contractors’ National
Association) construction standard on fibrous glass ducts. Both
acoustical lining and fibrous ductwork shall comply with
National Fire Protection Association Standards 90A or B as
tested by UL (Underwriters Laboratories) Standard 181 for
Class 1 air ducts.
Step 4 — Connect Piping
CONDENSATE PIPING The unit is supplied with a 3/4-in.
female pipe thread drain connection to connect drain piping.
When installing the unit, follow these recommendations:
• Condensate piping should slope downward in the
direction of condensate flow, with a minimum gradient
of 1 inch per 100 inches.
• Condensate piping should be installed in such a way that
it does not block the front service panel.
• A drain trap may be required by local codes and is
recommended for odor control.
• The differential height between inlet and outlet should be
at least three inches. The differential height between the
bottom of the trap and outlet should also be three inches.
See Fig. 4.
Fig. 4 —Condensate Drain Trap
• Auxiliary drain should be connected and run to a location
where it is easily visible when it becomes active
suggesting a problem with the main drain system.
• When multiple units are connected to a common
condensate drain, ensure that the drain is large enough to
cope with the volume of condensate from all units. It is
also recommended to have an air vent in the condensate
piping to prevent air locks.
• Insulate the drain line to prevent sweating and provide
proper support to prevent undue stress.
• Condensate piping must not be installed where it may be
exposed to freezing temperatures.
REFRIGERANT PIPING
When connecting from an indoor unit to an outdoor unit,
follow these procedures:
• Check for maximum height drop and length of
refrigerant piping between the indoor and outdoor unit. If
the difference is more than 33 feet, consider mounting
the outdoor unit above indoor unit.
• Refrigerant piping connection between indoor and
outdoor units should be performed once the units are
secured at their respective installation locations.
• The refrigeration piping starts at the indoor unit and ends
at the outdoor unit.
• There must be less than 15 bends in the refrigeration
piping.
• The refrigerant piping should be dry and free of dust and
other contaminants.
• The bending angle of the refrigerant pipe should not
exceed 90°F and the bending radius should be as large as
possible to prevent any breakage in piping.
• Use a torque wrench for flare nuts. Refer to Table 3 for
flare nut torque recommendations.
• Use proper cutting and flaring tools to avoid leakage.
Table 3 —Flare Nut Torque Recommendations
• Before insulating the suction and liquid refrigeration
pipes, perform pressure and leak tests. For details, see
the outdoor unit installation manual. Insulating both
suction and liquid refrigerant pipes is required.
• Vacuuming and charging of the system should be carried
out as described in the outdoor unit installation manual.
IMPORTANT: If the unit is installed in the ceiling, be sure
that the ceiling grid is supported separately from the unit.
The ceiling grid must not be supported by any part of the
unit, grille, or any associated wiring or piping work.
CAUTION
When connecting from an indoor unit to an outdoor unit,
the isolation valve at the outdoor unit should be in the
closed position throughout the refrigerant piping process.
Failure to follow this procedure may result in equipment
damage.
Outside Diameter (in.) Recommended Torque (ft-lb)
1/4 15
3/8 26
1/2 41
5/8 48

7
Step 5 — Complete Electrical Connections
Installation of wiring must conform with local building codes,
or in the absence of local codes, with National Electric Code
ANSI/NFPA 70, current editions. Units must be electrically
grounded in conformance with the code. In Canada, wiring
must comply with CSA C22.1, Electrical Code.
This equipment in its standard form is designed for an
electrical supply of 208/230-1-60. Any damage to or failure of
units caused by incorrect wiring or voltage is not covered by
warranty.
Electric wiring must be sized to carry the full load amp draw of
the motor, starter, and any other controls that are used with the
unit. See Table 4 for electrical data.
Table 4 — 40VMV Electrical Data
After the pipe work is complete, the electrical supply can be
connected by routing the cable through the appropriate casing
holes or knockouts and connecting the supply and ground
cables to the unit’s power terminal.
Be sure the power wiring and control wiring do not cross, as
this might cause disturbance on the controls side. See Fig. 5 for
wiring diagram.
NOTE: The indoor unit requires its own power supply. Indoor
units are not powered from outdoor units.
Step 6 — Position and Connect Controller
NOTE: Controllers are ordered separately.
Wired controllers should be installed in a position that
maintains good temperature control:
• Position the thermostat approximately 48 inches above
floor level.
• Do not position thermostat where it can be directly
affected by the unit’s discharge airstream.
• Avoid external walls and drafts from window and doors.
• Avoid positioning near shelves and curtains as these
restrict air movement.
• Avoid heat sources such as direct sunlight, heaters,
dimmer switches, and other electrical devices.
See Fig. 6 and Fig. 7.
CONTROL WIRING
1. The communication wire should be 2-core stranded
shielded cable.
2. For indoor and outdoor unit communication, use P, Q
terminals. Shielded core should be used for ground.
3. Wiring should be done according to wiring diagram.
4. Communication wire must not form a closed loop.
5. Use separate conduit for power and control wiring.
WARNING
Electrical shock can cause personal injury and death.
Disconnect power supply before making wiring
connections. There may be more than one disconnect
switch. Tag all disconnect locations to alert others not to
restore power until work is completed.
WARNING
All units must be wired strictly in accordance with the
wiring diagram furnished with the unit. Any wiring
different from the wiring diagram could result in personal
injury and property damage.
CAUTION
Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature
rating of at least 221°F.
Ensure supply voltage to the unit, as indicated on the serial
plate, is not more than 10% over the rated voltage or 10%
under the rated voltage.
Failure to follow these recommendations may result in
equipment damage.
40VMV UNIT SIZE POWER SUPPLY
MCA MOPD
012A 1.5 15
018A 3.8 15
024A 3.8 15
030A 3.8 15
036A 5.3 15
048A 5.3 15
054A 7.2 15
LEGEND
MCA —Minimum Circuit Amps
MOPD —Maximum Overcurrent
Protective Device

8
Fig. 5 —40VMV012A-054A Typical Wiring Diagram
Fig. 6 —Communication Wire Connection
OPTION/EXTENSIONS OF COMMUNICATION
WIRING
To extend control wiring or make terminal connections, use the
PQ connection wire supplied in the accessory kit and follow
the steps below.
1. Cut the connector on the outdoor unit side as shown in
Fig. 7.
Fig. 7 —Shearing Outdoor Connector
EEV
CN28
P2 P1
T2B
T1
T2A
XP1-XP3 XS1-XS3
BLUE
WHITE
RED
SW1 SW8
Main board
ON/OFF
SWITCH
ALARM
PUMP
CN50
ACB interface
NC5N115C
( Voltage range: 0-24V AC/DC)
( Current range: 0-1A)
FAN
CTON HTON
AUXH
RED
BLACK
XS4
XP4
XS5
XP5
XS6
XP6
XT1
BLACK
RED
Y/G
CN27
CN3 CN18 CN31 CN54 CN4
CN15
CN19
CN8
CN21 CN12
CN26 CN14 CN25 CN52
CN17 CN9
To wired controller
comm. bus
XP8
XP9
MDC unit comm. bus
To outdoor/ indoor /
P
Q
XT2
HA
HB
HA
HB
BLUE
WHITE
L1 L2
POWER IN
P
Q
ENC1 ENC2
Occupancy sensor/ ON-OFF (Dry contact)
Heat
“ +5V GND +12V ”
ONLY USED
FOR TESTING
XP4/XS4
Display Board
XP7/XS7
No Beep Harness
LEGEND
ALARM — Warning lamp (optional)
AUXH —Output for Auxiliary Heat
CTON —Output for Cooling Operation
EEV —Electronic Expansion Valve
FAN —Output for Fan Operation
FM —Indoor Fan Motor
HTON —Output for Heating Operation
MDC —Multiport Distribution Controller
PUMP —Pump Motor
T1 —Room Temperature Sensor
T2A —Inlet Pipe Temperature Sensor
T2B —Evap. Outlet Temperature in Cooling Mode
XP1-9 —Connectors
XS1-7 —
XT1-2 —Terminal Block
To outdoor/indoor/MDC units
comm. bus
To wired controller comm. bus
XT2

9
2. Strip a suitable length of the insulation layer as shown in
Fig. 8.
Fig. 8 — Stripping the Wire
3. Use a suitable screwdriver to fix communication wire on
outdoor unit communication terminal as shown in Fig. 9.
If communication wires are use to connect between indoor
units, find the corresponding port and plug it in directly as
shown in Fig. 10.
Fig. 10 —Connecting the Communication Wires
If it is not possible to buy communication wires from Carrier,
connect the indoor unit side of the communication wires using
the connector provided with the accessories as shown in Fig.
11-13.
Fig. 9 — Connecting Communication Wire to
Outdoor Unit Communication Terminal
CAUTION
Failure to follow these procedures may result in personal
injury or damage to equipment.
NEVER CONNECT the main power source to the
control or communication terminal block.
USE AN APPROPRIATE SCREWDRIVER for
tightening the terminal screws. Do not over tighten the
terminal screws.
IMPORTANT: Wiring for communication shall be two
inches or more apart from power source wiring to avoid
electric noise. Do not insert control/communication and
power source wire in the same conduit.
Pay attention to the polarity of the communication wire.
Connector in accessory kitConnector on indoor unit Communication cable
in field
Fig. 11 — Connecting the Communication Cable to Indoor Unit to Outdoor Unit Using the Supplied Connector

10
Fig. 12 — Typical Communication Wiring of Heat Recovery System
LEGEND
AWG — American Wire Gage
IDU — Indoor Unit
MDC — Multiport Distribution Controller
P Q X Y
Main MDC
X Y
MDC
outdoor unit Centralized controller
HA HB
P Q
P Q
P Q
P Q
P Q
P Q
Wired controller
HA HB
indoor
To No.1
To No.2
indoor
To No.3
indoor
To No.4
indoor
indoor
To No.1
To No.2
indoor
To outdoor
To Sub.MDC
To outdoor
Indoor unit 1#
L1
L2
L3
L3
L3
L3
L4
L5
L6
L7
L8
L9
L10
11L
Indoor unit 2#
Indoor unit 3#
Indoor unit 4#
Indoor unit 5#
Indoor unit 6#
HA
HB
HA
HB
HA
HB
HA
HB
HA
HB
HA
HB
Touch screen
wired controller
Note: 24v DC Power
Note: Power from IDU
Maximum wiring length
L1+L2 < 3937 ft. 18 AWG, 2-Core Stranded Shield
L3 < 3937 ft. 18 AWG, 2-Core Stranded Shield
L4
L4 < 3937 ft. 18 AWG, 2-Core Stranded Shield
L5 < 3937 ft. 18 AWG, 2-Core Stranded Shield
L6+L7+L8+L9 < 820 ft. 18 AWG, 2-Core Stranded Shield
L10+L11 < 820 ft. 18 AWG, 2-Core Stranded Shield

11
P Q X Y
Centralized controller
X Y
P Q
P Q
P Q
P Q
P Q
P Q
wired controller
HA HB
L1
L3
L5
L6
L7
L8
L9
L10
11L
L3
L3
L3
L3
outdoor unit
Indoor unit 1#
Indoor unit 2#
Indoor unit 3#
Indoor unit 4#
Indoor unit 5#
Indoor unit 6#
P
Q
HA
HB
HA
HB
HA
HB
HA
HB
HA
HB
HA
HB
Network Resistor
Maximum wiring length
L1+L3 < 3937 ft. 18 AWG, 2-Core Stranded Shield
L5< 3937 ft. 18 AWG, 2-Core Stranded Shield
L6+L7+L8+L9< 820 ft. 18 AWG, 2-Core Stranded Shield
L10+L11 < 820 ft. 18 AWG, 2-Core Stranded Shield
HA HB
Touch screen
wired controller
Note: 24v DC Power
Note: Power from IDU
Fig. 13 — Typical Communication Wiring of Heat Pump System

12
ACB (Auxiliary Control Board) Interface — The
ACB interface is a dry contact board that can output up to four
signals controlling devices. Refer to Fig. 14 for connecting
devices to the ACB interface board.
Fig. 14 —ACB Interface
START-UP
Pre-Start Check Once installation is complete, make the
following pre-start checks:
1. All indoor and outdoor units are properly installed.
2. All piping and insulation is complete.
3. All electrical connections (both power and control) are
properly terminated.
4. All condensate drains are installed correctly.
5. The power supply is of the right voltage and frequency.
6. The units are properly grounded in accordance with
current electrical codes.
7. Suction and liquid line service valves are in open
position.
System Operation Check Once the installation and
pre-start checks are completed, follow these steps:
1. Using remote controller, select cooling or heating mode
to check the operation of the system.
2. While the system is in operation, check the following on
indoor unit:
a. Switches or buttons on the remote controller are
easy to push.
b. Indicator light is showing normal operation and no
error is indicated.
c. Swing mode of air louvers is working (if
applicable to unit).
d. Drain pump operation is normal (if applicable).
e. No abnormal vibration or noise is noticed.
3. While the system is in operation, check the following on
outdoor unit:
a. No abnormal vibration or noise is noticed.
b. Condenser fan is in operation.
c. Indicator light is showing normal operation and no
error is indicated.
NOTE: If the unit is turned off or restarted, there is a time
delay of three minutes for the compressor to start from the time
the power is restored.
MAINTENANCE
Every 3 Months:
• Check the air filter condition. Clean or replace if
necessary.
Every 6 Months:
Follow 3-month maintenance schedule. In addition:
• Clean condensate tray with suitable cleaning agent.
• Clean the grille and panel.
Every 12 Months:
Follow 6-month maintenance schedule. In addition:
• Be sure all electrical connections are secure.
• Check condensate pump operation.
• Check the heating and cooling action to confirm
proper operation.
INDOOR UNIT ADDRESSING
For proper system operation, each indoor unit must have a
unique address set from 0 to 63. When setting an address by
remote controller; the outdoor units, indoor units, and MDC
must be powered on. If FE is displayed on the LED screen or
display board, this unit has no address. After setting all indoor
units’ addresses, turn off the power supply to all indoor units to
clear errors.
Indoor units’ addressing can be distributed automatically in the
heat pump system. When dip switch “S6” on the outdoor unit’s
main PCB board is set to 00 (default set in factory), indoor
units are set for auto-addressing. When powering on for the
first time, it takes six minutes or more to finish auto-addressing
each indoor unit. The heat recovery system cannot accomplish
this function at this time.
Wireless Remote Controller (40VM900001)
Indoor unit addressing can be performed using the wireless
remote controller. When using the wireless controller, the user
must maintain a line of sight with the receiver on the indoor
unit. See Fig. 15 for a description of the buttons on the wireless
remote.
LEGEND
ACB —Auxiliary control board
AUXH —Output for auxiliary heat
CTON —Output for cooling operation
FAN —Output for exhaust fan
HTON —Output for heating operation
MAX AMPS 1A
MAX VOLTAGE 24V
CN50
CN51
FAN
CTON HTON
AUXH
CAUTION
When servicing or repairing this unit, use only factory-
approved service replacement parts. Refer to the rating
plate on the unit for complete unit model number, serial
number and company address. Any substitution of parts or
controls not approved by the factory will be at the owner’s
risk and may result in equipment damage.
CAUTION
To avoid equipment damage, do not attempt to reuse any
mechanical or electrical controllers that have been wet.
Replace defective controller.

13
Fig. 15 —Wireless Remote Controller
(40VM900001)
Use a tool to press and hold the LOCK button for at least ten
seconds. Press to activate. Click or to select an
address and press to send the setting.
To display an indoor unit address, use a tool to press and hold
the LOCK button for at least ten seconds, and press to
query the addresses.
Non-Programmable Controller
When setting an address, connect only one wired controller to
an indoor unit.
Press ROOM TEMP and SWING simultaneously for three
seconds. If there is no address for this indoor unit, the display
shows FE# 00 as shown in Fig. 16. Otherwise, the display
shows the current address of the indoor unit.
Click TEMP. UP or TEMP. DOWN to change 00 to the
desired address as shown in Fig. 17. Press OK to confirm and
exit the setting interface.
Programmable Controller
When setting an address, connect only one wired controller to
an indoor unit.
1. Access parameter settings as shown in Fig. 18.
Fig. 18 —Programmable Controller IDU
Addressing Menu
2. Press TEMP. UP or TEMP. DOWN to move the cursor
down and choose IDU ADDRESSING, and select
MENU/OK to access this setting.
RESET
TIMER ON
TIMER OFF
SWING
AIR DIRECTION
CLOCK
OK
SWING
MODE FAN
AUTO
COOL
DRY
HEAT
FAN
TEMP
SET
CLOCK
SET
HOUR
FAN SPEED
LOCK C/H
6 – AIR DIRECTION
4 – ADJU S T UP
2 – FAN S PEED S ETTING
9 – CLOCK S ETTING
14 – OK (CONFIRM)
10 – TIMER ON
11 – TIMER OFF
1 – MODE S ETTING
3 – ADJU S T DOWN
12 – RE S ET
13 – LOCK
15 – COOL/HEAT
5 – ON/OFF
7 – AIR VERT. S WING
8 – AIR HORIZ. S WING
MODE
FAN TEMP. DOWN
OK
TEMP. UP ON/OFF
TIMER
ROOM TEMP. SWING
#
Fig. 16 — Non-Programmable Controller IDU
Addressing Menu
#
MODE
FAN TEMP. DOWN
TEMP. UP
OK
ON/OFF
TIMER
ROOM TEMP. SWING
Fig. 17 — Non-Programmable Controller Setting
IDU Address
MODE
FAN
MENU
TEMP. DOWN
OK
TEMP. UP
BACK
ON/OFF

14
3. Press TEMP. UP or TEMP. DOWN to choose the
address you want to set as shown in Fig. 19. Press
MENU/OK to send this address to the IDU.
Fig. 19 —Programmable Controller Setting IDU
Address
4. Press BACK twice or wait 30 seconds to automatically
exit the parameter settings menu.
TROUBLESHOOTING
Fig. 20 shows the LED display panel. See Table 5 for a
summary of display indicators. Table 6 lists problems, possible
causes, and possible solutions.
Fig. 20 —Display Panel
Table 5 — Display Indicators
MODE
FAN TEMP. DOWN
MENU
OK
TEMP. UP
BACK
ON/OFF
MANUAL OPERATION TIMER DEF./FAN ALARM
ERROR CODE MODE / STATUS
[NO ERROR]
Setting Temperature Starting
“--” Shutdown
“--” Standby
“--” Timing ON
“--” Timing OFF
Setting Temperature System Defrost ON
Setting Temperature System Defrost OFF
ERROR
dd Heating / Cooling Mode Conflict Error
E1 Communication Error Between Indoor and Outdoor Unit
E2 Check Indoor Ambient Temperature Sensor (T1)
E4 Check Evaporator Temperature Sensor (T2)
E5 Check Evaporator Outlet Temperature Sensor (T2B)
E6 Check DC Fan Motor
E7 EEPROM Error (Data Storage)
E9 Communication Error Between Indoor Unit & Controller
Eb EEV Error
Ed Outdoor Unit Error
EE Condensate Error
FE No Address When Power ON For First Time
UU MDC Error In Auto System-Check Mode
LEGEND
EEPROM — Electronically Erasable Programmable Read-only Memory
EEV — Electronic Expansion Valve
MDC — Multiport Distribution Controller

15
Table 6 —Troubleshooting
ERROR DESCRIPTION POSSIBLE CAUSES POSSIBLE SOLUTIONS
dd Heating / Cooling Mode Conflict
System is in cooling or fan only mode and
heating signal is received from a unit on the
system.
All units should be in cooling mode for system to stay
in cooling mode.
System is in heating mode and cooling signal is
received from a unit in the system.
All units should be in heating mode.
E1 Communication Error Between Indoor
& Outdoor Unit
Signal wires are short-circuited or
disconnected.
Check or reconnect signal wire.
Signal wire close to electromagnetic source. Distance signal wires from electromagnetic source.
PC board fault. Replace PC board.
E2, E4, E5 Check Temperature Sensor
Loose connection at port on PC board. Tighten the connection at port on PC board.
Sensor is short-circuited. Using multi-meter, measure resistance of the sensor.
If the resistance is £ 100 ohms, change the sensor.
PC board fault. Replace PC board.
E6 DC Fan Motor
Operating Beyond Limits. Check and correct external static pressure on the
unit.
DC motor fault. Replace DC motor.
PC board fault. Replace PC board.
E7 EEPROM Error (Data Storage) Chip or PC board fault. Replace PC board.
E9 Communication Error Between Indoor
Unit & Controller
Signal wires are short-circuited or
disconnected.
Check or reconnect signal wires.
Signal wires close to electromagnetic source. Distance signal wires from electromagnetic source.
PC board fault. Replace PC board.
Eb EEV Error
EEV wires are short-circuited or disconnected. Replace EEV wires.
EEV stop. Replace EEV.
PC Board fault. Replace PC board.
Ed Outdoor Unit Error Outdoor unit fault. Refer to outdoor unit troubleshooting guide.
EE Condensate Error
Loose connection or disconnected. Tighten the connection or reconnect at port on PC
board.
Water level float is stuck. Inspect the slope.
Trap slope is too steep. Adjust the trap slope.
Drain pipe is too long. Adjust the length of drain pipe.
Drain pump faulty. Replace the drain pump.
FE No Address when Power ON for First
Time Indoor unit without address.
Run automatic addressing option at the outdoor unit.
Use remote wireless or wired controller to readdress
indoor unit.
UU MDC Auto System-Check Mode MDC fault Refer to MDC troubleshooting guide.
LEGEND
EEPROM —Electronically Erasable Programmable Read-only Memory
EEV —Electronic Expansion Valve
MDC —Multiport Distribution Controller
PC —Process Controller

16
APPENDIX A —DIP SWITCH SETTINGS
There are two DIP switches on the main board. Figures A and B show the settings for each parameter controlled by a switch. Switches
are shown in the default settings.
POSITION 1 — START-UP
OFF — Auto Addressing Mode (Default)
ON — Factory Test Mode
POSITION 2 —
OFF — Normal Mode (Default)
ON — Factory Self-Checking Mode
POSITION 3 — NOT USED
POSITION 4 — INDOOR UNIT IDENTIFICATION
OFF — STANDARD INDOOR UNIT (Default)
— MODE PRIORITY INDOOR UNIT (HP ONLY)
ON — (IDU address must be 63)
Fig. A — SW1 Settings
Fig. B — SW8 Settings
ON
OFF
1234
OFF — Thermal Off Fan Off (Default)
ON — Thermal Off Fan On
(The wired controller must be connected to the
indoor unit, and use the room temperature sensor
on the wired controller to turn on this function)

17
APPENDIX B —NAMEPLATES
Replacement Parts — Quote the unit model number
and unit serial number when ordering replacement parts or
contacting the factory about the unit. This information can be
found on the serial plates attached to the unit as shown in Figs.
21-27.
Fig. 21 —40VMV012---3 Unit Serial Plate
Fig. 23 —40VMV024---3 Unit Serial Plate
Fig. 24 —40VMV030---3 Unit Serial Plate
Fig. 22 —40VMV018---3 Unit Serial Plate

18
Fig. 25 —40VMV036---3 Unit Serial Plate Fig. 27 —40VMV054---3 Unit Serial Plate
Fig. 26 —40VMV048---3 Unit Serial Plate

19
APPENDIX C —FAN CURVES
The Vertical Air Handling Unit is equipped with a constant cfm motor that automatically adjusts the fan speed if the actual cfm is
beyond +/- 10% of the setpoint cfm.
Figures A-G show fan characteristics at high-speed, medium-speed, and low-speed.
External static pressure on the vertical air handling unit cannot exceed 0.8 in. wg.
Fig. A —40VMV012A Fan Curves Fig. C —40VMV024A Fan Curves
Fig. D —40VMV030A Fan Curves
0.00
0.20
0.40
0.60
0.80
1.00
EXTERNAL STATIC PRESSURE (in. wg)
H-speed
500
AIRFLOW (cfm)
M-speed
L-speed
700300 600400
Upper Limit of ESP
0.00
0.20
0.40
0.60
0.80
1.00
EXTERNAL STATIC PRESSURE (in. wg)
H-speed
M-speed
500
AIRFLOW (cfm)
L-speed
700300 400 600
Upper Limit of ESP
0.00
0.20
0.40
0.60
0.80
1.00
EXTERNAL STATIC PRESSURE (in. wg)
H-speed
M-speed
500
AIRFLOW (cfm)
L-speed
700300 400 600
Upper Limit of ESP
0.00
0.20
0.40
0.60
0.80
1.00
EXTERNAL STATIC PRESSURE (in. wg)
H-speed
M-speed
500
AIRFLOW (cfm)
L-speed
700300 400 600
Upper Limit of ESP
Fig. B —40VMV018A Fan Curves

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
© 2022 Carrier. All rights reserved. Edition Date: 04/22 Form No: 40VM-6SI
A Carrier Company Printed in U.S.A. Replaces: 40VM-5SI
20
Fig. E —40VMV036A Fan Curves
Fig. F —40VMV048A Fan Curves
Fig. G —40VMV054A Fan Curves
0.00
0.20
0.40
0.60
0.80
1.00
700 800 900 1000 1100 1200 1300 1400
EXTERNAL STATIC PRESSURE (in. wg)
H-speed
M-speed
L-speed
Upper Limit of ESP
AIRFLOW (cfm)
0.00
0.20
0.40
0.60
0.80
1.00
900 1000 1100 1200 1300 1400 1500 1600 17
00
H-speed
M-speed
L-speed
EXTERNAL STATIC PRESSURE (in. wg)
Upper Limit of ESP
AIRFLOW (cfm)
0.00
0.20
0.40
0.60
0.80
1.00
1000 1200 1400 1600 1800 2000
EXTERNAL STATIC PRESSURE (in. wg)
H-speed
M-speed
Upper Limit of ESP
L-speed
AIRFLOW (cfm)