Johnson Controls HIC2018B21S Manual

P5417050
Installation
and
Maintenance
Manual
INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP
AIR CONDITIONERS
Type Model
2-Way Cassette (H,Y,C)IC2018B21S
(H,Y,C)IC2024B21S
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
INSTALLING THIS HEAT
PUMP AIR CONDITIONER.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.

ATTENTION
Each model number and all matching model numbers within a system must have
the same version of software.
Follow these steps to verify that your product model numbers have the same
version of software.
• Access the main printed circuit board in each product.
• Locate a white sticker with a P-XXXX number or
• Connect a service checker and locate the ROM number.
For further assistance, please contact our Technical Support Center at 1 (844)
873-4445 and select Option 2.

P5417050-rev.1 i
Important Notice
●Johnson Controls, Inc. pursues a policy of continuing improvement in design and performance in its
products. As such, Johnson Controls reserves the right to make changes at any time without prior
notice.
●Johnson Controls cannot anticipate every possible circumstance that might involve a potential hazard.
●This heat pump air conditioning unit is designed for standard air conditioning applications only. Do
not use this unit for anything other than the purposes for which it was intended.
●The installer and system specialist shall safeguard against leakage in accordance with local
pipetter and electrical codes. The following standards may be applicable, if local regulations are
not available. International Organization for Standardization: (ISO 5149 or European Standard, EN
378). No part of this manual may be reproduced in any way without the expressed written consent of
Johnson Controls.
●This heat pump air conditioning unit is operated and serviced in the United States of America and
comes with a full complement of the appropriate Safety, Dangers, Cautions, and Warnings.
●If you have questions, please contact your distributor or dealer.
●This manual provides common descriptions, basic and advanced information to maintain and service
this heat pump air conditioning unit which you operate as well for other models.
● This heat pump air conditioning unit has been designed for a specic temperature range. For optimum
performance and long life, operate this unit within the range limits according to the table below.
●This manual should be considered as a permanent part of the air conditioning equipment and should
remain with the air conditioning equipment.
Product Inspection upon Arrival
1. Upon receiving this product, inspect it for any damages incurred in transit. Claims for damage, either
apparent or concealed, should be led immediately with the shipping company.
2. Check the model number, electrical characteristics (power supply, voltage, and frequency rating),
and any accessories to determine if they agree with the purchase order.
3. The standard utilization for this unit is explained in these instructions. Use of this equipment for
purposes other than what it is designed for is not recommended.
4. Please contact your local agent or contractor as any issues involving installation, performance, or
maintenance arise. Liability does not cover defects originating from unauthorized modications
performed by a customer without the written consent of Johnson Controls, Inc. Performing any
mechanical alterations on this product without the consent of the manufacturer will render your
warranty null and void.
Temperature
Maximum Minimum
Cooling
Operation
Indoor 89oF DB/73oF WB (32oC DB/23oC WB) 69oF DB/59oF WB (21oC DB/15oC WB)
Outdoor 118oF DB (48oC DB) * 14oF DB (-10oC DB) *
Heating
Operation
Indoor 80oF DB (27oC DB) 59oF DB ( 15oC DB)
Outdoor 59oF WB (15oC WB) * -4oF WB (-20oC WB) *
DB: Dry Bulb, WB: Wet Bulb
* The temperature may change depending on the outdoor unit.

ii P5417050-rev.1
TABLE OF CONTENTS
1. Introduction ........................................................................................................................................................... 1
2. Safety Instructions ................................................................................................................................................ 1
3. Before Installation ................................................................................................................................................. 8
3.1 Combinations of Outdoor Units and Indoor Units......................................................................................... 8
3.2 Transportation and Handling ........................................................................................................................ 8
3.3 Factory-Supplied Accessories ...................................................................................................................... 8
4. Installation Location .............................................................................................................................................. 9
5. Installation Work ..................................................................................................................................................11
5.1 Opening of False Ceiling and Location of Suspension Bolts.......................................................................11
5.2 Installing Suspension Bolts .........................................................................................................................11
5.3 Working Procedures................................................................................................................................... 12
5.4 Installation of Decorative Panel.................................................................................................................. 15
6. Refrigerant Piping Work...................................................................................................................................... 16
6.1 Piping Materials.......................................................................................................................................... 16
6.2 Piping Connection ...................................................................................................................................... 16
7. Condensate Piping.............................................................................................................................................. 18
8. Electrical Wiring .................................................................................................................................................. 22
8.1 General Check ........................................................................................................................................... 22
8.2 Electrical Wiring Capacity........................................................................................................................... 22
8.2.1 Field Minimum Wire Sizes for Power Supply.................................................................................... 22
8.2.2 Details of Electrical Wiring Connection............................................................................................. 23
8.3 Position of Electrical Wiring Connection..................................................................................................... 24
8.4 Wired Controller Cable ............................................................................................................................... 27
8.4.1 Cautions for Individual Louver Settings ............................................................................................ 27
8.4.2 Cautions for Decorative Panel with Motion Sensor Kit (SOR-NED) ................................................. 28
8.4.3 Caution for Electrical Wiring ............................................................................................................. 29
8.5 Wiring Connections .................................................................................................................................... 30
8.6 DIP Switch Settings.................................................................................................................................... 31
8.7 High Speed Setting .................................................................................................................................... 33
8.8 Circulation Function at Heating Thermo-OFF* ........................................................................................... 33
8.9 Individual Louver Settings (Number of Louver Outlets).............................................................................. 33
8.10 Control of Dew Condensation Prevention .................................................................................................. 34
8.11 Function Selection by Wired Controller ...................................................................................................... 35
8.12 Setback Operation...................................................................................................................................... 37
9. Test Run.............................................................................................................................................................. 38
9.1 Before Test Run.......................................................................................................................................... 38
9.2 Test Run ..................................................................................................................................................... 38
9.3 Alarm Code ................................................................................................................................................ 42

P5417050-rev.1 1
● For details on wiring between the indoor unit and the outdoor unit, refer to the "Installation and Maintenance
Manual" for the outdoor unit.
● For details on the optional decorative panel, refer to the "Installation and Maintenance Manual" for the
optional decorative panel.
● For details on the optional controller, refer to the "Installation and Maintenance Manual" for that optional
controller module.
● For details on each optional part, refer to the "Installation and Maintenance Manual" for each optional part.
● For the central controller, refer to the "Installation and Maintenance Manual" for the central controller.
1. Introduction
2. Safety Instructions
Signal Words
Indicates a hazardous situation that, if not avoided, could result in death
or serious injury.
Indicates a hazardous situation that, if not avoided, could result in minor or
moderate injury.
Indicates information considered important, but not hazard-related (for
example, messages relating to property damage).
General Precautions
To reduce the risk of serious injury or death, read these instructions
thoroughly and follow all warnings or cautions included in all manuals
that accompanied the product and are attached to the unit. Refer back to
these safety instructions as needed.
● This system should be installed by personnel certied by Johnson Controls, Inc. Personnel must be
qualied according to local, state and national building and safety codes and regulations. Incorrect
installation could cause leaks, electric shock, re or explosion. In areas where Seismic Performance
requirements are specied, the appropriate measures should be taken during installation to guard
against possible damage or injury that might occur in an earthquake if the unit is not installed
correctly, injuries may occur due to a falling unit. Suspend pipes at certain points and reinforce
against earthquakes so that they will not be damaged by an external force. Check local codes and
regulations.
●Use appropriate Personal Protective Equipment (PPE), such as gloves and protective goggles and,
where appropriate, have a gas mask nearby. Also use electrical protection equipment and tools suited
for electrical operation purposes. Keep a wet cloth and a re extinguisher nearby during brazing. Use
care in handling, rigging, and setting of bulky equipment.
●When transporting, be careful when picking up, moving and mounting these units. Although the
unit may be packed using plastic straps, do not use them for transporting the unit from one location
to another. Do not stand on, or put any material on, the unit. Get a partner to help, and bend with
Forward this information, and the warranty to all installers and users.
Ask end users to maintain copies for future reference.
(Refrigerant Piping Work) (Electrical Wiring Work) (Ref. Charge Work) (Test Run) (User)
Read following sections carefully before installing this product.
Read over the "Installation and Maintenance Manual" for the outdoor unit as well.

2 P5417050-rev.1
your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum ns on the air
conditioner can cut ngers, so wear protective gloves.
●Do not touch or adjust any safety devices inside the indoor or outdoor units. All safety features,
disengagement, and interlocks must be in place and functioning correctly before the equipment is put
into operation. If these devices are improperly adjusted or tampered with in any way, a serious accident
can occur. Never bypass or jump-out any safety device or switch.
●Before servicing, turn-OFF the power supply and use accepted lockout and tag out procedures at all
main switches.
●This unit is a pressurized system. Never loosen threaded joints while the system is under pressure and
never open pressurized system parts.
●Johnson Controls will not assume any liability for injuries or damage caused by not following steps
outlined or described in this manual. Unauthorized modications to Johnson Controls' products are
prohibited as they…
◦May create hazards that could result in death, serious injury or equipment damage
◦Will void product warranties
◦ May invalidate product regulatory certications
◦May violate OSHA standards
Take the following precautions to reduce the risk of property damage.
●Be careful that moisture, dust, or variant refrigerant compounds not enter the refrigerant system
during installation work. Foreign matter could damage internal components or cause blockages.
● If air lters are required on this unit, do not operate the unit without the air lter set in place. If the air
lter is not installed, dust may accumulate and breakdown may result.
●Do not install this unit in any place where silicon gases can coalesce. If the silicon gas molecules
attach themselves to the surface of the heat exchanger, the nned surfaces repel water. As a result,
any amount of drainage moisture condensate can overow from the condensate pan and could run
inside of the electrical box, possibly causing electrical failures.
●When installing the unit in a hospital or other facility where electromagnetic waves are generated from
nearby medical and/or electronic devices, be prepared for noise and electromagnetic interference
(EMI). Do not install where the waves can directly radiate into the electrical box, controller cable,
or controller. Inverters, appliances, high-frequency medical equipment, and radio communications
equipment may cause the unit to malfunction. The operation of the unit may also adversely affect
these same devices. Install the unit at least 10 ft. (3m) away from such devices.
●When a wireless controller is used, locate at a distance of at least 3.3 ft. (1m) between the indoor unit
and electric lighting. Otherwise, the receiver part of the unit may have difculty receiving operation
commands.
●If the wired controller is installed in a location where electromagnetic radiation is generated, make
sure that the wired controller is shielded and cables are sleeved inside conduit tubing.
●If there is a source of electrical interference near the power source, install noise suppression
equipment (lter).
●Do not install the unit in any location where animals and plants can come into direct contact with the
outlet air stream. Exposure could adversely affect the animals and plants.
●Do not install the unit with any downward slope to the side of the drain adapter. If you do, you may
have condensate water owing back, which may cause leaks.
●Be sure the condensate hose discharges water properly. If connected incorrectly, it may cause leaks.
●Do not install the unit in any place where oil can seep onto the units, such as table or seating areas in
restaurants, and so forth. For these locations or social venues, use specialized units with oil-resistant
features built into them. In addition, use a specialized ceiling fan designed for restaurant use. These
specialized oil-resistant units can be ordered for such applications. However, in places where large
quantities of oil can splash onto the unit, such as a factory, even the specialized units cannot be used.
These products should not be installed in such locations.

P5417050-rev.1 3
Installation Precautions
To reduce the risk of serious injury or death, the following installation
precautions must be followed.
●When installing the unit into…
▫A wall: Make sure the wall is strong enough to hold the unit’s weight. It may be necessary to
construct a strong wood or metal frame to provide added support.
▫A room: Properly insulate any refrigerant tubing run inside a room to prevent “sweating” that can
cause dripping and water damage to wall and oors.
▫Damp or uneven areas: Use a raised concrete pad or concrete blocks to provide a solid, level
foundation for the unit to prevent water damage and abnormal vibration.
▫An area with high winds: Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable wind bafe.
▫A snowy area: Install the outdoor unit on a raised platform that is higher than drifting snow. Provide
snow protection hood.
● Do not install the unit in the following places. Doing so can result in an explosion, re, deformation,
corrosion, or product failure.
▫ Explosive or ammable atmosphere
▫ Where a re, oil, steam or powder can directly enter the unit, such as nearby or above a kitchen
stove.
▫Where oil (including machinery oil) may be present.
▫ Where corrosive gases such as chlorine, bromine, or sulde can accumulate, such as near a hot
tub or a hot spring.
▫ Where dense, salt-laden airow is heavy, such as in coastal regions.
▫Where the air quality is of high acidity.
▫Where harmful gases can be generated from decomposition.
●Do not install a decorative panel with a motion sensor in the following places. It may cause failure or
deterioration of the sensor.
▫Ambient temperature changes drastically.
▫Where excessive force or vibration is applied to the sensor.
▫Where static electricity or electromagnetic waves may generate.
▫Where interference of infrared light such as gasses or mist is in the detecting area.
▫Where the lens for sensor is exposed in high temperature and humidity for a long time.
▫Where uid and corrosive gas exist.
▫Where light such as sunlight or direct light affect the sensor.
▫Where hot air from a heater, or something similar directly affects the sensor.
▫Where the airow bounces back to the sensor by hitting obstacles such as shelf or locker.
▫Where blower devices such as a ceiling fan or ventilating fan affect the airow from the indoor unit.
▫Where weather directly affects the surface of the sensor.
▫Where the lens surface may smudge or be damaged from something like a dusty environment.
Detecting function decreases, if the lens sensor has smudges.
In this case, wipe off smudges using a cotton swab soaked with alcohol or a soft cloth. Isopropyl
alcohol is recommended. (When wiping off smudges on the lens sensor, do not apply excessive
force. If excessive force is applied, the resin lens may be damaged and this may cause
malfunctions such as misdetection or undetectable motion.)
●Do not position the condensate pipe for the indoor unit near any sanitary sewers where corrosive
gases may be present. If you do, toxic gases can seep into breathable air spaces and can cause
respiratory injuries. If the condensate pipe is installed incorrectly, water leakage and damage to the
ceiling, oor, furniture, or other possessions may result. If the condensate pipe becomes clogged,
water may drip from the indoor unit. Do not install the indoor unit where such dripping can cause
moisture damage such as uneven locations. Use a raised concrete pad or concrete blocks to provide
a solid, level foundation for the unit to prevent water damage and abnormal vibration.
● Before performing any brazing work, be sure that there are no ammable materials or open ames
nearby. Always purge piping with Nitrogen when brazing.
●Perform a test run to ensure normal operation. Safety guards, shields, barriers, covers, and protective
devices must be in place while the compressor/unit is operating. During the test run, keep ngers and
clothing away from any moving parts.

4 P5417050-rev.1
● Clean up the site when nished, remembering to check that no metal scraps or bits of wiring have
been left inside the unit being installed.
After installation work for the system has been completed, explain the “Safety Precautions,” the proper use
and maintenance of this unit to the customer according to the information in all manuals that came with the
system. All manuals and warranty information must be given to the user or left near the indoor unit.
Refrigerant Precautions
To reduce the risk of serious injury or death, the following refrigerant
precautions must be followed.
●As originally manufactured, this unit contains refrigerant installed by Johnson Controls. Johnson
Controls uses only refrigerants that have been approved for use in the unit’s intended home country
or market. Johnson Controls' distributors similarly are only authorized to provide refrigerants that
have been approved for use in the countries or markets they serve. The refrigerant used in this unit
is identied on the unit’s faceplate and/or in the associated manuals. Any additions of refrigerant into
this unit must comply with the country’s requirements with regard to refrigerant use and should be
obtained from Johnson Controls' distributors. Use of any non-approved refrigerant substitutes will void
the warranty and will increase the potential risk of injury or death.
●If installed in a small room, take measures to prevent the refrigerant from exceeding the maximum
allowable concentration in the event that refrigerant gases should escape. The installation should
meet the requirements in ASHRAE Standards 15 and 34. If refrigerant gas has leaked during the
installation work, ventilate the room immediately.
●Check the design pressure for this product is 601 psi (4.15MPa). The pressure of the refrigerant
R410A is 1.4 times higher than that of the refrigerant R22. Therefore, the refrigerant piping for
R410A shall be thicker than that for R22. Make sure to use the specied refrigerant piping. If not, the
refrigerant piping may rupture due to an excessive refrigerant pressure. Besides, pay attention to
the piping thickness when using copper refrigerant piping. The thickness of copper refrigerant piping
differs depending on its material.
●The refrigerant R410A is adopted. The refrigerant oil tends to be affected by foreign matters such
as moisture, oxide lm, (or fat). Perform the installation work with care to prevent moisture, dust, or
different refrigerant from entering the refrigerant cycle. Foreign matter can be introduced into the cycle
from such parts as expansion valve and the operation may be unavailable.
●To avoid the possibility of different refrigerant or refrigerant oil being introduced into the cycle, the
sizes of the charging connections have been changed from R407C type and R22 type. It is necessary
to prepare the following tools listed in Section 3 before performing the installation work. Use
refrigerant pipes and joints that are approved for use with R410A.
●Before installation is complete, make sure that the refrigerant leak test has been performed. If
refrigerant gases escape into the air, turn OFF the main switch, extinguish any open ames and
contact your service contractor. Refrigerant (uorocarbon) for this unit is odorless. If the refrigerant
should leak and come into contact with open ames, toxic gas could be generated. Also, because the
uorocarbons are heavier than air, they settle to the oor, which could cause asphyxiation.
●When installing the unit, and connecting refrigerant piping, keep all piping runs as short as possible,
and make sure to securely connect the refrigerant piping before the compressor starts operating. If
the refrigerant piping is not connected, and the compressor activates with the stop valve opened, the
refrigerant system is subjected to extremely high pressure, which can cause an explosion or re.
● Tighten the are nut with a torque wrench in the specied manner. Do not apply excessive force to the
are nut when tightening. If you do, the are nut can crack and refrigerant leakage may occur.

P5417050-rev.1 5
Electrical Precautions
●Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram
and these instructions when wiring. Improper connections and inadequate grounding can cause
serious injury or death.
●Perform all electrical work in strict accordance with this manual and all relevant regulatory
standards.
●Do not open the service cover or access panel to indoor or outdoor units without turning OFF
the main power supply. Before servicing, open and tag all disconnect switches. Never assume
electrical power is disconnected. Check with a meter and equipment.
●Only use electrical protection equipment and tools suited for this installation.
● Use specied cables between units.
●Do not run the relay wiring for the motion sensor and power supply wiring in parallel.
Electromagnetic Interference (EMI) may cause malfunction of the sensor.
●Communication cable shall be a minimum of AWG18 (0.82mm2), 2-Conductor, Stranded Copper.
Shielded cable must be considered for applications and routing in areas of high EMI and other
sources of potentially excessive electrical noise to reduce the potential for communication errors.
When shielded cable is applied, proper bonding and termination of the cable shield is required
as per Johnson Controls guidelines. Plenum and riser ratings for communication cables must be
considered per application and local code requirements.
●Use an exclusive power supply for the air conditioner at the unit’s rated voltage.
●Be sure to install circuit breakers (ground fault interrupter, isolating switch, molded case circuit
breaker and so on), with the specied capacity. Ensure that the wiring terminals are tightened
securely to recommended torque specications. If a circuit breaker or fuse is frequently activated,
shut down the system and contact your service contractor.
●The polarity of the input terminals is important, so be sure to match the polarity when using
contacts that have polarity.
●Before installing the controller or remote devices, ensure the indoor and outdoor unit operation has
been stopped. Further, be sure to wait at least ve minutes before turning OFF the main power
switch to the indoor or outdoor units. Otherwise, water leakage or electrical breakdown may result.
●Clamp electrical wires securely with a cable band after all wiring is connected to the terminal block.
In addition, run wires securely through the wiring access channel.
●A compressor/unit comprises a pressurized system. Never loosen threaded joints while the
system is under pressure and never open pressurized system parts.
●When maintaining, relocating, or disposing of the unit, dismantle the refrigerant piping after the
compressor stops.
●When pipes are removed from under the piping cover, after the insulation work is completed,
cover the gap between the piping cover and pipes using a packing (eld-supplied). If the gap is
not covered, the unit may be damaged if snow, rain water or small animals enter the unit.
●Do not apply an excessive force to the stop valve at the end of opening. Otherwise, the stop
valve ies out due to refrigerant pressure. At the test run, fully open the gas and liquid valves.
Otherwise, these devices become damaged. (It is closed before shipment.)
● If the arrangement for outdoor units is incorrect, it may cause owback of the refrigerant and
result in failure of the outdoor unit.
●The refrigerant system may be damaged if the slope of the piping connection kit exceeds +15o.
Take the following precautions to reduce the risk of electric shock, re
or explosion resulting in serious injury or death.

6 P5417050-rev.1
●When installing the power lines, do not apply tension to the cables. Secure the suspended cables at
regular intervals, but not too tightly.
●Make sure that the terminals do not come into contact with the surface of the electrical box. If the
terminals are too close to the surface, it may lead to failures at the terminal connection.
●Turn OFF and disconnect the unit from the power supply when handling the service connector. Do
not open the service cover or access panel to the indoor or outdoor units without turning OFF the
main power supply.
● After stopping operation, be sure to wait at least ve minutes before turning off the main power
switch. Otherwise, water leakage or electrical breakdown may result. Disconnect the power supply
completely before attempting any maintenance for electrical parts. Conrm that no residual voltage is
present after disconnecting the power supply.
●Do not clean with, or pour water into, the controller as it could cause electric shock and/or damage
the unit. Do not use strong detergent such as a solvent. Clean with a soft cloth.
●Check that the ground wiring is securely connected. Do not connect ground wiring to gas piping,
water piping, lighting conductor, or telephone ground wiring.
●If a circuit breaker or fuse is frequently activated, shut down the system and contact your service
contractor.
●This equipment can be installed with a Ground Fault Circuit Breaker (GFCI), which is a recognized measure
for added protection to a properly grounded unit. Install appropriate sized breakers / fuses / overcurrent
protection switches, and wiring in accordance with local, state and NEC codes and requirements. The
equipment installer is responsible for understanding and abiding by applicable codes and requirements.