Johnson Controls Y Seroes, DHY24NWB21S, DHY09CSB21S, DHY12CSB21S, DHY18CSB21S Installation And Maintenance Manual

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Page 1

Installation

and

Maintenance

Manual

"Y" SERIES

INVERTER-DRIVEN AIR

CONDITIONING UNITS

Type

INDOOR UNITS

Type

OUTDOOR UNITS

Model

DHY09NWB21S DHY12NWB21S DHY18NWB21S DHY24NWB21S

Model

DHY09CSB21S

DHY12CSB21S

DHY18CSB21S DHY24CSB21S

,03257$17

PLEASE READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS INVERTER AIR CONDITIONING UNIT. KEEP THIS MANUAL FOR FUTURE REFERENCE.

-DRIVEN

Page 2

Important Notice

● Johnson Controls, Inc. pursues a policy of continuing improvement in design and performance in its

products. As such, Johnson Controls, Inc. reserves the right to make changes at any time without prior notice.

● Johnson Controls, Inc. cannot anticipate every possible circumstance that might involve a potential hazard.

● This inverter 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 for.

● 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, Inc.

● This inverter-driven (cooling or heat pump) air conditioning unit will be operated and serviced in the

United States of America and comes with all required Safety, Danger, and Caution, 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 inverter-driven (cooling or heat pump) air conditioning unit which you operate, as well for other models.

● This inverter-driven (cooling or heat pump) air conditioning unit has been designed for a specic

temperature range. For optimum performance and long life, operate this unit within range limits.

● 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 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.

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Table of contents

Table of Contents

Introduction and Safety Summary

2. Installation

2.1 Installation Dimension Diagram ......................................................................................1

2.2 Main Tools for Installation and Maintenance .................................................................2

2.3 Installation Procedures.....................................................................................................3

Installation Checking Parts

2.4

2.5 Selection of Installation Location ....................................................................................4

2.6 Electric Connection Requirement ....................................................................................4

2.7 Installation of Indoor Unit...................................................................................................4

2.8 Installation of Outdoor Unit ...............................................................................................7

2.9 Vacuum Pump/Leak Detection ........................................................................................8

2.10 Post Installation Testing ................................................................................................8

3. Troubleshooting

3.1 Precautions before Performing Inspection or Repair .....................................................9

................................................................................................................1

.............................................................................................4

..................................................................................................9

.......................................................i

3.2 Confirmation .................................................................................................................10

3.3 Flashing LED of Indoor/Outdoor Unit and Primary Judgment .....................................10

3.4 How to Check Simply the Main Part .............................................................................19

3.4 Troubleshooting for Normal Malfunction .......................................................................32

Appendix:

Appendix 1: Reference Sheet of Celsius and Fahrenheit ...................................................34

Appendix 2: Configuration of Connection Pipe ....................................................................34

Appendix 3: Pipe Expanding Method ..................................................................................35

Appendix 4: List of Resistance for Temperature Sensor .....................................................36

Customer Service, Technical Support

.......................................................................................................................34

..................................................39

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1. Introduction

This manual concentrates on inverter-driven cooling or heat pump air conditioning units. Read this manual carefully before installation.

This manual should be considered as a permanent part of the air conditioning equipment and should remain with the air conditioning equipment.

2. Important Safety Instructions

Safety Messages

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.

● 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 quenching 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 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.

● Johnson Controls, Inc. 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 which could result in death, serious injury or equipment damage. ◦ Will void product warranties. ◦ May invalidate product regulatory certications. ◦ May violate OSHA standards.

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Take the following precautions to reduce the risk of property damage.

● Be careful that moisture, dust, or variant refrigerant compounds not enter the refrigerant cycle 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 will repel water. As a result, any amount of 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 electronic interference 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. (approximately 3m) away from such devices.

● When a wireless zone controller is used, locate at a distance of at least 3.3 ft. (approximately 1 meter) between the indoor unit and electric lighting. If not, the receiver part of the unit may have difculty

receiving operation commands.

● 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 boss. If you do, you may have 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.

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 air bafe.

▫ A snowy area (only for heat pump model): Install the outdoor unit on a raised platform that is

higher than drifting snow. Provide snow vents.

● 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 re, oil, steam, or powder can directly enter the unit, such as in close proximity or directly

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 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.

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● 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 condensate piping becomes clogged,

moisture can back up and can drip from the indoor unit. Do not install the indoor unit where such dripping can cause moisture damage or 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.

● Perform a run test 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.

● 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.

● During transportation, do not allow the backrest of the forklift to make contact with the unit, otherwise, it may cause damage to the heat exchanger and also may cause injury when stopped or started suddenly.

● Remove gas inside the closing pipe when the brazing work is performed. If the brazing ller metal is

melted with remaining gas inside, the pipes will be blown off and it may cause injury.

● Be sure to use nitrogen gas for an airtight test. If other gases such as oxygen gas, acetylene gas or uorocarbon gas are accidentally used, it may cause explosion or gas intoxication.

After installation work for the system has been completed, explain the “Safety Precautions,” the proper use and maintenance of the 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. Refrigerant gases can cause asphyxiation (0.42 kg/m3 based on ISO 5149 for R410A). Consult with your distributor for countermeasures (ventilation system and so on). If refrigerant gas has leaked during the installation work, ventilate the room immediately.

● The design pressure for this product is 601 psi (4.15MPa). The pressure of R410A refrigerant 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 specified 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 appropriate tools before performing the installation work.

● Use refrigerant pipes and joints which are approved for use with R410A.

● A compressor/unit comprises a pressurized system. Never loosen threaded joints while the system is

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under pressure and never open pressurized system parts.

● 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 (Fluorocarbon) 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 cycle will become 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.

● When maintaining, relocating, and disposing of the unit, dismantle the refrigerant piping after the

compressor stops.

● When pipes are removed out from under the piping cover, after the insulation work is completed,

cover the gap between the piping cover and pipes by 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 spindle valve at the end of opening. Otherwise, the spindle

valve ies out due to refrigerant pressure. At the run test, fully open the gas and liquid valves,

otherwise, these devices will be 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.

Electrical Precautions

Take the following precautions to reduce the risk of electric shock, re or

explosion resulting in serious injury or death.

● 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 installation and maintenance manual and all

the relevant regulatory standards.

● Before servicing, open and tag all disconnect switches. Never assume electrical power is

disconnected. Check with meter and equipment.

● Only use electrical protection equipment and tools suited for this installation.

● Use specied cables between units.

● The new air conditioner may not function normally in the following instances:

▫ If electrical power for the new air conditioner is supplied from the same transformer as the device*

referred to below.

▫ If the power source cables for this device* and the new air conditioner unit are located in close

proximity to each other.

Device*: (Example): A lift, container crane, rectier for electric railway, inverter power

device, arc furnace, electric furnace, large-sized induction motor and large-sized switch.

Regarding the cases mentioned above, surge voltage may be inducted into the power supply cables for the packaged air conditioner due to a rapid change in power consumption of the device and an activation of a switch.

Check eld regulations and standards before performing electrical work in order to protect the

power supply for the new air conditioner unit.

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● Communication cabling shall be a minimum of 18-Gauge, 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 cabling 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 requirments.

● 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.

● Clamp electrical wires securely with a cable clamp after all wiring is connected to the terminal block.

In addition, run wires securely through the wiring access channel.

● 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 source 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 ceasing 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 source completely before attempting any maintenance for electrical parts. Check to ensure that no residual voltage is present after disconnecting the power source.

● 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 wire 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.

● Perform all electrical work in accordance with this manual and in compliance with all regulations and

safety standards.

● Do not open a service access cover or panel of an indoor or outdoor unit without rst turning OFF the

power at the main power supply.

● Residual voltage can cause electric shock. At all times, check for residual voltage after disconnecting

from the power source before starting work on the unit.

● 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.

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Installation and Maintenance

Installation

2.1 Installation Dimension Diagram

At least 5 8/9 inch

Space to the ceiling

Space to the wall

At least 5 8/9 inch

Space to the wall

At least 5 8/9 inch

roolf eht ot ecapS

At least 118 inch

Space to the obstruction

Space to the wall

At least 11 4/5 inch

At least 98 3/7 inch

Space to the obstruction

At least 19 2/3 inch

Space to the obstruction

At least 11 4/5 inch

Space to the obstructio

At least 78 3/5 inch

Condensate pipe

Space to the obstruction

At least 19 2/3 inch

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Installation and Maintenance

2.2 Main Tools for Installation and Maintenance



1. Level meter, measuring tape

4. Electroprobe

7. Electronic leakage detector

2. Screw driver

5. Universal meter

8. Vacuum pump

3. Impact drill, drill head, electric drill

6. Torque wrench, open-end wrench, inner hex wrench

9. Manifold gauge

10. Pipe pliers, pipe cutter

11. Pipe expander, pipe bender

12. Soldering appliance, refrigerant container

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Installation and Maintenance

2.3 Installation Procedures

Start installation

Preparation before installation

Read the requirements for electric connection

Select indoor unit installation location

Install wall-mounting frame, drill wall holes

Connect pipes of indoor unit and drainage pipe

Connect wires of indoor unit

Bind up pipes and hang the indoor unit

Make the bound pipes pass through the wall hole and then connect outdoor unit

Select installation location

Prepare tools

Select outdoor unit installation location

Install outdoor unit mount (select it according to the actual situation)

Mount outdoor unit

Install drainage joint of outdoor unit (only for cooling and heating unit)

Connect pipes of outdoor unit

Connect wires of outdoor unit

Arrange the pipes

Vacuum pumping and leakage detection

Check after installation and test operation

Finish installation

Note: This flow is only for reference; please find more detailed installation steps in this section.

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Installation and Maintenance

2.4 Installation - Checking Parts

No. Name No. Name

1 Indoor unit 8 Sealant 2 Outdoor unit 9 Wrapping tape

3 Connection pipe 10 4 Drainage pipe 11 Fixing screw

Wall-mounting

frame Connecting

cable(power cord)

7 Wall pipe

Note:

1. Please contact the local agent for installation.

2. Don't use unqualied power cord.

.5 Selection of Installation Location

Basic Requirement:

Installing the unit in the following places may cause malfunction. If it is unavoidable, please consult the local dealer:

(1) Areas with strong heat sources, vapors, flammable or

explosive gas, or volatile objects spread in the air. (2) Areas with high-frequency devices machine, medical equipment). (3) Areas near coast. (4) Areas with oil or fumes in the air. (5) Areas with sulfureted gas. (6) Other places with special circumstances.

2. Indoor Unit:

(1) There should be no obstruction near air inlet and air outlet. (2) Select a location where the condensation water can be dispersed easily and won't affect other people. (3) Select a location which is convenient to connect the outdoor unit and near the power socket. (4)

Select a location which is out of reach for children. (5) The location should be able to withstand the weight of indoor unit and won't increase noise and vibration.

(6) The appliance must be installed 98 3/7 inch above oor.

(7) Don't install the indoor unit right above the electric appliance. (8) The appliance should not be installed in a laundry area.

3. Outdoor Unit:

1.Select a location where the noise and outow air emitted by

the outdoor unit will not affect neighborhood.

2.The location should be well ventilated and dry, in which the outdoor unit won't be exposed directly to sunlight or strong wind.

3.The location should be able to withstand the weight of outdoor unit.

Make sure that the installation complies with requirements

4. iof the installation dimensions diagram.

5.Select a location which is out of reach for children and far away from animals or plants.If it is unavoidable, please add fence for safety purposes.

Support of outdoor unit

Drainage plug(cooling

and heating unit) Owner’s manual,

remote controller

(such as welding

2.6 Electric Connection Requirement

1. Safety Precaution

(1) All electric safety regulations must be followed when installing the unit. (2) Use proper power supply circuit and air switch in

accordance with local safety regulations.

(3) The power supply must be sized to meet the requirements of air conditioning unit. Incorrect sizing/wiring may result in

electric shock,fire hazard or malfunction.

Air-conditioner Air switch capacity

09/12K 16A

18K 20A 24K 30A

(4) Properly connect the live wire, neutral wire and grounding wire of power socket. (5) Be sure to cut off the main power supply before performing any electrical work.

(6) Do not turn power back on until installation is complete.

(7) For appliances with type Y attachment,the instructions shall contain the substance of thefollowing.If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or a qualified technician to avoid any shock

hazards.

(8) The temperature of refrigerant circuit will be high, please keep the interconnection cable away from the copper tube.

Grounding Requirements:

(1) The air conditioning unit must be properly grounded with a specialized grounding device by a certified technician.

Please make sure it is always grounded effectively, otherwise it may cause electric shock. (2) The yellow-green wire in air conditioner is grounding wire, which can't be used for other purposes. (3) The grounding resistance should comply with national electric safety regulations. (4) The unit must be positioned so that the plug is accessible. (5) An all-pole disconnect switch having a contact separation of at least 1/8 inch in all poles should be connected in fixed wiring. (6) Including an air switch with suitable capacity, please note the

following table. Air switch should be included magnet buckle and heating buckle function, it can protect the circuitshort and overload. (Caution: Please do not use only the fuse to protect the circuit.)

2.7 Installation of Indoor Unit

1. Choosing Installation Iocation

Recommend installation location to the client based on field

conditions; then proceed after client approval.

2. Install Wall-mounting Frame

(1) Hang the wall-mounting frame on the wall; adjust it in horizontal position with the level meter and then point out the

screw xing holes on the wall. (2) Drill the screw xing holes on the wall with impact drill (the

specification of drill head should be the same as the plastic

expansion particle) and then ll the plastic expansion particles

Page 13

Installation and Maintenance

Rear left

Indoor

Outdoor

in the holes.

Wall

(Rear piping hole)

Tape

Outlet pipe

Torque wrenc

Open-end

Drain hose

(3) Fix the wall-mounting frame on the wall with tapping screws

(ST4.2X25TA) and then check if the frame is rmly installed by

pulling the frame. If the plastic expansion particle is loose,

please drill another xing hole nearby.

3. Install Wall-mounting Frame

(1) Choose the position of piping hole accor

ding to the direction of outlet pipe. The position of piping hole should be a little lower than the wall-mounted frame.(As shown in Fig.1)

Space to the wall

5 8/9inch above

Mark on the middle of it

Gradienter

Space to the wall

5 8/9inch above

5. Connect the Pipe of Indoor Unit

(1) Aim the pipe joint at the corresponding bellmouth.(As shown in Fig.5) (2) Pretightening the union nut with hand. (3) Adjust the torque force by referring to the following sheet. Place the open-end wrench on the pipe joint and place the torque wrench on the union nut. Tighten the union nut with torque wrench.(As shown in Fig.6) (4) Wrap the indoor pipe and joint of connection pipe with insulating pipe, and then wrap it with tape.(As shown in Fig.7) (5) If a 18k indoor unit is to be connected with a DHM or DHW outdoor unit, a transitional pipe joint (provided) should be added at the pipe joint of indoor unit evaporator assy as the pipe joint of evaporator assy adopts pipe diameter of Φ5/8. Please refer to step 1-4 during installation.

Left Ф2 3/4inch Ф2 3/4inch

Fig.1

(2) Open a piping hole with the diameter of Φ2

Right

3/4inch on the selected outlet pipe position.In order to drain smoothly, slant the piping hole on the

wall slightly downward to the

outdoor side with the gradient of 5-10°.(As shown in Fig.2)

5-10

Φ2 3/4inc

Fig.2

Note:

(1) Pay attention to dust prevention and take relevant safety measures when opening the hole. (2) The plastic expansion particles are not provided and should be bought locally.

4. Outlet Pipe

(1) The pipe can be led out in the direction of right, rear right, left or rear left.(As shown in Fig.3) (2) When selecting leading out the pipe from left or right, please cut off the corresponding hole on the bottom case.(As show in Fig.4)

wrench

Fig.7

Pipe

Union nut

Indoor pipe

Insulating pipe

Union nutPipe joint

Fig.5 Fig.6

Refer to the following table for torque tightening:

Hex nut diameter(inch) Tightening torque(ft·Ibf)

Φ1/4 11.10~14.75 Φ3/8 20.12~29.50 Φ1/2 33.19~40.56 Φ5/8 44.24~47.94 Φ3/4 51.32~55.31

6. Install Drain Hose

(1) Connect the condensate hose to the outlet pipe of indoor unit.(As shown

in Fig.8)

(2) Bind the joint with tape.(As show in Fig.9)

Condensate hose

Pipe

Fig.3

Right

Left Right

Cut off the hole

Left

Rear right

Fig.4

pipe

Condensate hose

Fig.9

Outlet

Fig.8

Note:

(1) Add insulating pipe in the indoor condensate hose in order to prevent condensation. (2) The plastic expansion particles are not provided. (As shown in Fig.10)

Insulating pip

Fig.10

Page 14

Installation and Maintenance

Indoor power cord

7. Connect Wire of Indoor Unit

Indoor

Outdoor

Wall pipe

Upper hook

wall-mounting frame

Wiring cover

Screw

(1) Open the panel, remove the screw on the wiring cover and then take down the cover.(As shown in Fig.11)

Panel

Fig.11

8. Bind up Pipe

(1) Bind up the connection pipe, power cord and condensate hose with the band.(As shown in Fig.14) (2) Reserve a certain length of drain hose and power cord for installation when binding them. When binding to a certain degree, separate the indoor power and then separate the condensate hose.(As shown in Fig.15) (3) Bind them evenly. (4) The liquid pipe and gas pipe should be bound separately at the end.

(2) Fix the wire crossing board on connection wire sleeve at the bottom case; let the connection wire sleeve go through the wire crossing hole at the back of indoor unit, and then pull it out from the front.(As shown in Fig.12)

connection wire sleeve

Fig.12

(3) Remove the wire clip; connect the power connection wire

to the wiring terminal; tighten the screw and then fix the power

connection wire with wire clip.(As shown in Fig.13)

Wiring Cover

Outdoor unit

Fig.13

(4) Put wiring cover back and then tighten the screw. (5) Close the panel.

Indoor and

outdoor power cord Gas pipe

Band

Liquid pipe

Condensate hose

Fig.14

Connection pipe

Indoor unit

Condensate hose

Fig.15

Note:

(1) The power cord and control wire can't be crossed or winding. (2) The condensate hose should be bound at the bottom.

9. Hang the Indoor Unit

(1) Put the bound pipes in the wall pipe and then make them pass through the wall hole. (2) Hang the indoor unit on the wall-mounting frame. (3) Stuff the gap between pipes and wall hole with sealing gum. (4) Fix the wall pipe. (As show in Fig.16)

(5) Check if the indoor unit is installed firmly and closed to the

wall.(As shown in Fig.17)

Note:

(1) All wires of indoor unit and outdoor unit should be connected by a professional.

(2) If the length of power connection wire is insufcient, please

contact the supplier for a new one. Avoid extending the wire by yourself. (3) For the air conditioning unit a with plug, the plug should be reachable after finishing installation. (4) For the air conditioning unit without a plug, an air switch must be installed in the line. The air switch should be allpole parting and the contact parting distance should be more than 3/32 inch.

Fig.17

Sealant

Fig.16

Lower hook of

Note:

Do not bend the condensate hose too excessively in order to prevent blocking.

Page 15

Installation and Maintenance

The drain hos

Union nut

Foot holes

2.8 Installation of Outdoor Unit

Wall

Drain hose

Outdoor drain joint

Drain ven

Installupport of Outdoor Unit(select it according to the

1. actual installation situation)

(1) Select installation location according to the house structure. (2) Secure with expansion screws.

(1) Take sufficient protective measures when installing the outdoor unit. (2) Make sure the support can withstand at least four times the unit weight. (3) The outdoor unit should be installed at least 1 1/6 inch

above the oor in order to install drain joint.(As show in Fig.18)

(4) For the unit with cooling capacity of 2300W~5000W, 6 expansion screws are needed; for the unit with cooling capacity of 6000W~8000W, 8 expansion screws are needed; for the unit with cooling capacity of 10000W~16000W, 10 expansion screws are needed.

the support of outdoor unit on the selected location

Note:

Refer to the following table for torque tightening:

Hex nut diameter(inch) Tightening torque(ft·Ibf)

Φ1/4 11.10~14.75 Φ3/8 20.12~29.50 Φ1/2 33.19~40.56 Φ5/8 44.24~47.94 Φ3/4 51.32~55.31

5. Connect Outdoor Electric Wire

(1) Remove the c

onnection wire sleeve go through the two

holes of bafe; tighten the connection joint of sleeve and bafe;

remove the wire clip; connect the power connection wire and power cord to the wiring terminal; fix them with screws.(As shown in Fig.23)

Handle

09/12K

N(1)

223

L1L1L2

t least 1 1/6 inch above the floo

Condensate hose

Chassis

Fig.18 Fig.19

2. Install Drain Joint(only for cooling and heating unit)

(1) Connect the outdoor drain joint into the hole on the chassis.(2) Connect the condensate hose into the drain vent.(As shown in Fig.19)

3. Fix Outdoor Unit

(1) Place the outdoor unit on the support. (2)

Fix the foot holes of outdoor unit with

bolts.(As shown in Fig.20)

Handle

Fig.20

Fig.21

4. Connect Indoor and Outdoor Pipes

(1) Remove the screw on the right handle of outdoor unit and then remove the handle.(As show in Fig.21) (2) Remove the screw cap of

valve and aim the pipe joint at the

bellmouth of pipe.(As shown in Fig.22)

Fig.23

N(1)

Indoor unit connection

18/24K

Power

L2 L1

(2) Fix the power connection wire and power cord with wire clip.

Note:

(1) After tightening the screw, pull the power cord slightly to

check if it is rm.

(2) Never cut the power connection wire to prolong or shorten the distance.

Arrange the Pipes

(1) The pipes should be placed along the wall, bent reasonably and hidden. The semidiameter of bending the pipe is 4 in. (2) If the outdoor unit is higher than the wall hole, a U-shaped curve in the pipe is a must before pipe goes into the room, in order to prevent rain from getting into the room.(As shown in Fig.24)

can't raise upwards

Power

Liquid pipe

Liquid valve

gas pipe

gas valve

Fig.22

(3) Pretightening the union nut with hand. (4) Tighten the union nut with torque wrench .

Pipe joint

Fig.24

U-shaped curve

Note:

(1) The through-wall height of drain hose shouldn't be higher than the outlet pipe hole of indoor unit.(As shown in Fig.25) (2) Slant the condensate hose slightly downwards. The

condensate hose can't be curved, raised or fluctuant.(As

shown in Fig.26)

Fig.25

Page 16

Installation and Maintenance

(3) The water outlet can't be placed in water in order to drain

Refrigerant charging vent

Nut of refrigerant

Charging vent

outlet can't be

The water outlet can't be placed in water

smoothly.(As show in Fig.27)

The drain hose can't be fluctuant

The water

fluctuant

Fig.27

Fig.26

2.9 Vacuum Pump/Leak Detection

1. Use Vacuum Pump

(1) Remove the valve caps on the liquid valve and gas valve and the nut of refrigerant charging vent. (2) Connect the charging hose of manifold gauge to the refrigerant charging vent of gas valve and then connect the other charging hose to the vacuum pump. (3) Open the manifold gauge completely and operate for 10-15min to check if the pressure of manifold gauge remains in

-0.1MPa. (4) Close the vacuum pump and maintain this status for 1-2min to check if the pressure of manifold gauge remains in

-0.1MPa. If the pressure decreases, there may be leakage. (5) Remove the manifold gauge, open the valve core of liquid valve and gas valve completely with inner hex wrench. (6) Tighten the screw caps of valves and refrigerant charging vent.(As shown in Fig.28)

Liquid valve

Gas valve

Inner hex

wrench

Fig.28

Manifold gauge

Valve cap

Vacuum pump

Open

Lo Hi

2.10 Post Installation Testing

1. Check after Installation

Check according to the following requirements after finishing installation.

No. Items to be checked Possible malfunction

Has the unit been

installed rmly?

Have you done the

refrigerant leakage test?

Is heat insulation of

pipeline sufcient?

4 Is water drained well?

Is the voltage of power supply according to the

voltage marked on the

nameplate?

Is electric wiring and

pipeline installed

correctly?

Is the unit grounded

securely?

Does the power cord

follow the specication?

Is there any obstruction

in air inlet and air outlet?

The dust and sundries caused

during installation are

removed?

The gas valve and liquid

valve of connection pipe

are open completely?

2. Test Operation

(1) Preparation of test operation

● The client approves the air conditioner installation.

● Specify the important notes for air conditioner to the client.

(2) Method of test operation

● Put through the power, press ON/OFF button on the remote

controller to start operation.

● Press MODE button to select AUTO, COOL, DRY, FAN and

HEAT to check operations.

● If the ambient temperature is lower than 16

conditioner can’t start cooling.

The unit may drop, shake or emit noise.

It may cause insufcient cooling

(heating) capacity. It may cause condensation and water dripping. It may cause condensation and water dripping.

It may cause malfunction or damage the parts.

It may cause electric shock. It may cause malfunction or

damage the parts.

It may cause insufcient cooling

(heating).

It may cause malfunction or damaging the parts.

It may cause insufficient

cooling (heating).

, the air

℃

2. Leakage detection

(1) Check for leaks using the leak detector: (2) With soap water:

if a leak detection tool is unavailable, use soap water to detect

any leak. Apply soap water to the suspected leak position and

observe for 3 minutes, if bubbles appear then there is a leak.

Page 17

Installation and Maintenance

Troubleshooting

3.1 Precautions before Performing Inspection or Repair

Be cautious during installation and maintenance. Follow safety due to drop from high attitude.

Static maintenance is is performed while the unit is d-energized.

* For static maintenance, make sure that the unit is de-energized and the plug is disconnected. *dynamic maintenance is the maintenance during energization of the unit. Before dynamic maintenance, check that the unit is properly grounded using a voltage tester. Check the copper piping and housing of the unit to ensure there are no voltage leaks. After ensure insulation place and the safety, the maintenance can be performed.

Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.

At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position. Please follow troubleshooting procedures as described below.(Refer to the check points written on the wiring diagrams attached to the indoor/outdoor units.)

regulations at all times to avoid electric shock and casualty or even death

No. Troubleshooting procedures

1 Conrmation

Judgment by Flashing LED of Indoor/Outdoor Unit

2 3 How to Check the Main Parts

NOTE:

A large-capacity electrolytic capacitor is used in the outdoor unit controller(inverter).Therefore,if the power supply is turned off, charge(charging voltage DC280V to 380V)remains and discharging takes a lot of time. After turning off the power source,if touching the charging section before discharging, an electrical shock may be caused.

Discharging method

(1)remove the inverter cover(Outoor Unit)

(2)As shown below,connect the discharge rescharge resistance(approx.100Ω,20W) or plug of the soldering iron to voltage between + -

terminals of the electrolytic capacitor (test 3*D* and *E* point) on PC Board for 30s ,and then perform discharging

Page 18

Installation and Maintenance

3.2 Confirmation

(1)Conrmation of Power Supply Conrm that the power breaker operates(ON) normally; (2)Conrmation of Power Voltage Conrm that power voltage is AC 208-230 ±10%. If power voltage is not in this range, the unit may not operate normally.

3.3 Flashing LED of Indoor/Outdoor Unit and Primary Judgment

Page 19

Installation and Maintenance

(1)Models:09/12K:

Malfunction and Status Display Table

15 times

No. Malfunction Name

1 Malfunction of Circuit for zero cross detection U8

2 Malfunction protection for jumper cap C5

3 No feedback from indoor motor H6

Indoor ambient temp sensor has open or short

Indoor evaporator temp sensor has open or

Liquid valve temp sensor has open or short

6 7 8 Module temp sensor has open or short circuit P7

9 10 11 12 13

14 15

16 Demagnetization protection of compressor HE 17 Malfunction of voltage drop of DC bus bar U3

18 Module temperature protection P8 19 20 Malfunction of charging for capacitor PU

21 High pressure protection for the system E1 22 23

24 25 Overspeed (for commercial air conditioner)

26 Malfunction of

27 28 29

30 31 Thermal overload protection for compressor H3

32 Non-match between indoor and outdoor units LP 33 Malfunction of memory chip

Gas valve temp sensor has open or short

Outdoor ambient temp sensor has open or

Outdoor inlet pipe temp sensor of condenser

has open or circuit (for commercial use)

Outdoor middle pipe temp sensor of condenser

Outdoor outlet pipe of condenser has open or

Outdoor discharge temp sensor has open or

Communication malfunction of indoor and

Malfunction of circuit for detecting phase

Lack of refrigerant or block protection for the

Reset of drive module (for commercial air

AC contactor protection (for commercial air

Temperature drift protection(for commercial air

Sensor connection protection (for commercial

Communication malfunction for drive board(for

has open or short circuit

short circuit (for commercial use)

current of compressor

system (not applicable to residential air

Low pressure protection for the system Lock of compressor (for commercial air

commercial air conditioner)

circuit

short circuit

circuit circuit

short circuit

outdoor units

conditioner)

reserved

conditioner) conditioner)

air conditioner)

Malfunction

Type

Malfunction

hardware

Display

Nixie Tube

F1 F2

b5 b7

F3 A5 F4 A7 F5

E3 LE / / /

P0 / / / LF

P9 / / /

PE / /

Pd / / / P6

Display of Malfunction of Indoor Unit

Status of LED Lamp

LED

Lamp

for

Operation

Blinks for 17

times

Blinks

for 15

times

Blinks

for 11

times

Blinks for 6

times

Blinks

once Blinks for 3

times

/ / / / / /

Blinks

for 16

times

LED Lamp

for

Cooling

Blinks

once

Blinks

twice

Blinks for

19 times

Blinks for

22 times

Blinks for

3 times

Blinks for

4 times

Blinks for

5 times

Blinks for

10 times

LED Lamp

for

Heating

Blinks for

18times

Blinks for

12 times

Blinks for

14 times

Blinks for

20 times

Blinks for

19 times

Blinks for

17 times

Blinks for

3 times

Blinks for

Malfunction of

Outdoor Unit

Status of LED

Lamp

Yellow

LED

Lamp

Blinks for

10 times

Blinks for

8 times

Blinks for

16 times

Red LED

Lamp

Blinks for 6

times

Blinks for 5

times

Blinks for 7

times

Blinks for 9

times

Page 20

Installation and Maintenance

Wrong connection of communication wire or

times

35 36

37 Mode conflict E7 38 Refrigerant reclaiming mode Fo

39 Oil return under defrosting or heating H1 40 Nominal cooling or heating (capacity test code) P1 / / /

41 Max. cooling or heating (capacity test code) P2 / / / 42 Middle cooling or heating(capacity test code) P3 / / / 43 Min. cooling or heating(capacity test code) P0 / /

44 Failure of startup of compressor Lc 45

46 Overload protection E8

47 Overcurrent protection for the complete unit E5

48 Overcurrent protection for the complete unit P5 49 Desynchronizing of compressor H7

50 Lack/reverse phase protection of Ld / / / 51 Module current protection (IPM protection) H5

52 Overlow voltage protection for DC bus bar PL

53 Overhigh voltage protection for DC bus bar PH 54 PFC protection HC

55 Overhigh power protection (not for outdoor L9 56 Abnormal reversing of 4-way valve U7

57 58 59

60 Frequency limit/decrease for freeze protection FH

61 Frequency limit/decrease for overload F6

62 63 Oil return in cooling F7 64 Cold air prevention E9 65 Freeze protection E2

66 Reading malfunction of EEPROM 67 Reaching temperature for turning on the unit

68 Frequency limit (power)

69 Malfunction of outdoor fan

malfunction of expansion valve (free match)

Malfunction of current detection for the

Wrong connection of communication wire or status of detecting malfunction of expansion

High discharge temperature protection of

Frequency limit/decrease for current protection Frequency limit/decrease for current protection

of the module (phase current)

Frequency limit/decrease for high discharge

Frequency limit/decrease for module

complete unit

valve (free match)

compressor

of the complete unit

temperature

temperature protection

Display is

controlled

by remote

control

dn / / /

dd / / /

Blinks for 7

times

Blinks

once

F8 En / / / F9

Blinks for 4

times Blinks for 8

times Blinks for 5

times

Blinks

for 20

times

Blinks

for 9

times Blinks

twice

Blinks for

13 imes

Blinks

once

Blinks for

11 times

Blinks for

20 times

Blinks for

8 times

Blinks for

9 times

Blinks

twice

Blinks for

6 times

Blinks for

6 times

Blinks for

7 times

Blinks

once

Blinks for

11 times

Blinks for

15 times

Blinks for

7 times

Blinks for

5 times

Blinks for

21 times

Blinks for

6 times

Blinks

twice

Blinks for

6 times

Blinks

twice

Blinks for

7 times

Blinks for

6 times

Blinks for

5 times

Blinks for

4 times

Blinks for

12 times

Blinks for

13 times

Blinks for

14 times

Blinks for

9 times

Blinks for

3 times

Blinks for

11 times

Blinks

once

Blinks

twice

Blinks

for 4

times

Blinks

for 3

times

Blinks

for 11 times

Blinks

for 8

times

Blinks

for

13time

s Blinks for 14

Page 21

Installation and Maintenance

If malfunction occurs,corresponding code will display and the unit will resume normal until protection or malfunction disappears.

Compressor stars (normal)Yellow indicator blinks for once

Yellow indicator

blinks for twice

Yellow indicator blinks for 3 times

Yellow indicator blinks for 4 times

Yellow indicator blinks for 5 times

Yellow indicator blinks for 6 times

Yellow indicator blinks for 7 times

Yellow indicator blinks for 8 times

Defrosting

Anti-freezing protection (normal

IPM protection

Overcurrent protection

Overload protection

Exhaust protection

Overlod protection of compresoor

(normal display of indoor unit)

display of indoor unit)

Indicator display

of outdoor unit

Red indicator blinks for once

Red indicator blinks for twice

Red indicator blinksfor 3 times

Cooling (dehumidify) or heating current dropped frequency current.

Exhaust temp. dropped frequency temp.

Tube

temp. dropped frequency temp.

Red indicator blinks for 4 times

Red indicator blinks for 5 times

Red indicator for 6 times

Red indicator blinks for 7 times

Red indicator blinks for 8 times

Green indicator does not blink

tube-in

dropped frequency temp.

Outdoor condenser temp. sensor mal.

Outdoor ambient temp. sensor mal.

Outdoor exhaust temp. sensor mal.

Starting at temp. does not reach

Communication is abnormal

Page 22

Installation and Maintenance

nalysis or processing of some of the malfunction display:

1. Compressor discharge protection

operation;

malfunction of compressor; malfunction of protection relay; malfunction of discharge sensor; outdoor temperature too

high. Processing method: refer to the malfunction analysis in the above section

2. Low voltage overcurrent protection

Possible reason: Sudden drop of supply voltage.

4. Sensor open or short circuit

Processing

lead wire is found.

Possible compresso Processing

the

Overload

temperature of indoor heat exchanger when heating) is too high, protection will beactivated.

Please refer to the malfunction analysis in the previous section for handling method

7. IPM module protection

Processing power the malfunction still exists,replace the module.

(2)Models:18/24K:

Communication malfunction

Processing method: Check if communication signal cable is connected reliably.

method: Check whethers ensor is normal, connected with the corre sponding position on the controller and if damage o

Compressor overload protection

reasons: insufficient or too much refrigrant; blockage of capillary an dincrease of suction temp.; improper running of

r, burning in or stuck of bearing, damage of discharge valve; malfunction of protector.

method: adjust refrige rant amount; replace the capillary; replace the compressor; use univers al meter to check if

System malfunction

protection.When tube temperature(Check the temperature of outdoor heat exchanger when cooling and check th

method:Once the module malfunction happens,if it persists for a long time and can not be self-canceled, cut off the

and turn off the unit,and then re-energize the unit again after about 10 min.After repeating the procedure for sever times, if

Page 23

Installation and Maintenance

NO.

Malfunction

Name

High pressure protection of system

Antifreezing protection

High

discharge temperature protection of compressor

Overcurrent protection

Communication Malfunction

High temperature resistant protection

Internal motor (fan motor) do not operate

Display Method of Indoor Unit

Dual-8

Display

Indicator Display (during

blinking, ON 0.5s and OFF 0.5s)

Code

Operation

Indicator

OFF 3s and blink once

OFF 3S and blink twice

OFF 3S and blink 4 times

OFF 3S and blink 5 times

OFF 3S and blink 6 times

OFF 3S and blink 8 times

OFF 3S and blink 11 times

Cool

Indicator

Heating

Indicator

Display Method of

Outdoor Unit

(Indicator has 3 kinds

of display status and

they will be displayed

circularly every 5s.)

□OFF

■Illuminated

(D40)D6(D41)

D16

(D42)

Blink

D30

(D43)

ƶƿƿƿ

ƵƶƵƶ

ƵƶƵƿ

ƶƵƿƶ

ƶƶƶƿ

ƵƶƵƵ

A/C status Possible Causes

During cooling and drying operation, except indoor fan operates, all loads stop operation. During heating operation, the complete unit stops. During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates.

During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating operation, all loads stop. During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating operation, all loads stop. During cooling operation, compressor stops while indoor fan motor operates. During heating operation, the complete unit stops. During cooling operation: compressor will stop while indoor fan will operate. During heating operation, the complete unit stops.

Internal fan motor, external fan motor, compressor and electric heater stop operation,guide louver stops at present location.

Possible reasons:

1. Refrigerant was superabundant;

2. Poor heat exchange (including

and bad radiating environment ); Ambient temperature is too high.

1. Poor air-return in indoor unit;

2. Fan speed is abnormal;

3. Evaporator is dirty.

Please refer to the malfunction analysis (discharge protection, overload).

1. Supply voltage is unstable;

2. Supply voltage is too low and load is too high;

3. Evaporator is dirty.

Refer to the corresponding malfunction analysis.

Refer to the malfunction analysis (overload, high temperature resistant).

1. Bad contact of DC motor feedback terminal.

2. Bad contact of DC motor control end.

3. Fan motor is stalling.

4. Motor malfunction.

5. Malfunction of mainboard rev detecting circuit.

Malfunction protection of jumper cap

Indoor ambient temperature sensor is open/short circuited

Overcurrent protection of phase current for compressor

OFF 3S and blink 15 times

OFF 3S and blink once

OFF 3S and blink 15 times

ƶƿƶƶ

Wireless remote receiver and button are effective, but can not dispose the related command

During cooling and drying operation, indoor unit operates while other loads will stop; during heating operation, the complete unit will stop operation.

During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation.

1. No jumper cap insert on mainboard.

2. Incorrect insert of jumper cap.

3. Jumper cap damaged.

4. Abnormal detecting circuit of mainboard.

1. Loosening or bad contact of indoor ambient temp. sensor and mainboard terminal.

2. Components in mainboard fell down leads short circuit.

3. Indoor ambient temp. sensor damaged.(check with sensor resistance value chart)

4. Mainboard damaged. Refer to the malfunction

analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor.

Page 24

Installation and Maintenance

Malfunction

position

normal

electrolytic

operation.

NO.

Name

Dual-8

Display

Indoor evaporator temperature

sensor is open/short circuited

Outdoor ambient temperature

sensor is open/short circuited

Outdoor condenser temperature

sensor is open/short circuited

Outdoor discharge temperature

sensor is open/short circuited

Limit/ decrease frequency

due to overload

Decrease frequency

due to overcurrent

Decrease frequency due to

high air discharge

Voltage for DC bus-bar

is too high

Malfunction of complete

units current detection

Display Method of Indoor Unit

Indicator Display (during blinking, ON 0.5s and OFF 0.5s)

Code

Operation Indicator

Cool Indicator

OFF 3S and blink twice

OFF 3S and blink 3 times

OFF 3S and blink 4 times

OFF 3S and blink 5 times

OFF 3S and blink for 6 times

OFF 3S and blink 8 times

OFF 3S and blink 9 times

OFF 3S and blink 11 times

OFF 3S and blink 13 times

Heating Indicator

Display Method of

Outdoor Unit

(Indicator has 3 kinds

of display status and

they will be displayed

circularly every 5s.)

□OFF

■Illuminated

(D40)D6(D41)

ƶƶƿƵ

ƶƶƿƶ

D16

(D42)

Blink

D30

(D43)

ƶƶƿƿ

Ƶƶƿƿ

ƵƵƶƵ

ƵƵƶƶ

ƶƵƶƿ

ƶƵƿƵ

A/C status Possible Causes

AC stops operation once reaches the setting temperature. Cooling, drying: internal fan motor stops operation while other loads stop operation; heating: AC stop operation

During cooling and drying operating, compressor stops while indoor fan operates; During heating operation, the complete unit will stop operation

During cooling and drying operation, compressor stops while indoor fan will operate; During heating operation, the complete unit will stop operation.

During cooling and drying operation, compressor will sop after operating for about 3 mins, while indoor fan will operate; During heating operation, the complete unit will stop after operating for about 3 mins.

All loads operate normally, while operation frequency for compressor is decreased

During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation.

During cooling and drying operation, the compressor will stop while indoor fan will operate; During heating operating, the complete unit will stop

1. Loosening or bad contact of Indoor evaporator temp. sensor and mainboard terminal.

2. Components on the mainboard fall down leads short circuit.

3. Indoor evaporator temp. sensor damaged.(check temp. sensor value chart for testing)

4. Mainboard damaged.

Outdoor temperature sensor hasnt been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor)

1.Outdoor temperature sensor hasnt been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor)

2.The head of temperature sensor hasnt been inserted into the copper tube

Refer to the malfunction analysis (overload, high temperature resistant)

The input supply voltage is too low; System pressure is too high and overload

Overload or temperature is too high;

Malfunction of electric expansio valve (EKV)

1. Measure the voltage of L and N on wiring board (XT), if the voltage is higher than 265VAC, turn on the unit after the suppl voltage is increased to the range.

2.If the AC input is normal, measure the voltage of capacitor C on control panel (AP1), if its normal, for the circuit, please replace th control panel (AP1)

Theres circuit malfunction o outdoor units control panel AP1 please replace the outdoor unit control panel AP1.

theres malfunction

Page 25

Installation and Maintenance

Malfunction

nalysis

NO.

20 Defrosting H1

Name

Dual-8

Code

Display

Display Method of Indoor Unit

Indicator Display (during blinking, ON 0.5s and OFF 0.5s)

Operation Indicator

Cool Indicator

Heating Indicator

OFF 3S and blink once

Display Method of

Outdoor Unit

(Indicator has 3 kinds

of display status and

they will be displayed

circularly every 5s.)

□OFF

■Illuminated

(D40)D6(D41)

D16

(D42)

Blink

A/C statusPossible Causes

D30

(D43)

Defrosting will occur in heating mode. Compressor will operate while indoor fan will stop operation.

Its the normal state

Static dedusting protection

Overload protection for compressor

System is abnormal

IPM protection

PFC protection

Desynchronizing of compressor

Decrease frequency due to high temperature resistant during heating operation

Failure startup

Malfunction of phase current detection circuit for compressor

OFF 3S and blink twice

OFF 3S and blink 3 times

OFF 3S and blink 4 times

OFF 3S and blink 5 times

OFF 3S and blink 6 times

OFF 3S and blink 7 times

OFF 3S and blink 10 times

OFF 3S and blink 11 times

OFF 3S and blink 13 times

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During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. All loads operate normally, while operation frequency for compressor is decreased

1. Wiring te rminal OVC-COMP is loosened. In normal state, the resistance for this terminal should be less than 1ohm.

2.Refer to the malfunction a ( discharge protection, overload) Refer to the malfunction analysis (overload, high temperature resistant)

Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor.

Refer to the malfunction analysis

Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor.

Refer to the malfunction analysis (overload, high temperature resistant)

Refer to the malfunction analysis

Replace outdoor control panel AP1

Page 26

Installation and Maintenance

NO.

capacitor C on control panel (AP1),

Malfunction

Name

EEPROM malfunction

Charging malfunction of capacitor

Malfunction of module temperature sensor circuit

Module high temperature protection

Malfunction of voltage dropping for DC bus-bar

Voltage of DC bus-bar is too low

Display Method of Indoor Unit

Dual-8

Display

Indicator Display (during blinking, ON 0.5s and OFF 0.5s)

Code

Operation Indicator

Cool Indicator

Heating Indicator

OFF 3S and blink 15 times

OFF 3S and blink 17 times

OFF 3S and blink

18 times

OFF 3S and blink 19 times

OFF 3S and blink 20 times

OFF 3S and blink 21 times

Display Method of

Outdoor Unit

(Indicator has 3 kinds

of display status and

they will be displayed

circularly every 5s.)

□OFF

■Illuminated

(D40)D6(D41)

D16

(D42)

Blink

D30

(D43)

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A/C status Possible Causes

During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop

During cooling operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop

During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop

Replace outdoor control panel AP1

Refer to the part three—charging malfunction analysis of capacitor

Replace outdoor control panel AP1

After the complete unit is deenergized for 20mins, check whether the thermal grease on IPM Module of outdoor control

whether the radiator is inserted tightly. If its no use, please replace control panel AP1.

Supply voltage is unstable

1. Measure the voltage of position L and N on wiring board (XT), if the voltage is higher than 150VAC, turn on the unit after the supply voltage is increased to the normal range.

2.If the AC input is normal, measure the voltage of electrolytic

Limit/ decrease frequency due to high temperature of module

The four-way valve is abnormal

Zerocrossing malfunction of outdoor unit

Limit/ decrease frequency due to antifreezing

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All loads operate normally, while operation frequency for compressor is decreased

If this malfunction occurs during heating operation, the complete unit will stop operation.

During cooling operation, compressor will stop while indoor fan will operate; during heating,the complete unit will stop operation.

All loads operate normally, while operation frequency for compressor is decreased

if its normal, theres malfunction for the circuit, please replace the control panel (AP1)

Discharging after the complete unit is de-energized for 20mins, check whether the thermal grease on IPM Module of outdoor control

whether the radiator is inserted tightly. If its no use, please replace control panel AP1.

1.Supply voltage is lower than AC175V;

2.Wiring terminal 4V is loosened or broken;

3.4V is damaged, please replace 4V.

Replace outdoor control panel AP1

Poor air-return in indoor unit or fan speed is too low

Page 27

Installation and Maintenance

3.4 How to Check the Main Parts

Indoor unit:

(1)Temperature sensor malfunction

Start

terminal between temperature sensor and the controller loosened or

Is there short circuit due to tri-pover

Is the temper sensor normal according to the Re

Is the wiring

poorly contac

of the pa rts?

sistance Table?

ted?

ature

yes

Insert the temperature

sensor tightly

M alfunction is

eliminated.

yes

Make the parts upright

Malfunction is

eliminated.

yes

Replace the controller with

one of the same model

End

Replace it with a temper

ature sensor

of the same model

Malfunction is

removed.

yes

Page 28

Installation and Maintenance

(2)Indoor fan does not operate (H6)

Start

Pull the blade by hand under de-energization status

Whether the blade can operate smoothly

Yes

Check whether the

wiring terminal between

indoor fan and main

board is loose

Energize and restart upthe

unit, test whether the voltage beween motor

terminal 1 and 2 is 280~310VDC

Yes

Adjust the motor and blade assembly to let the motor can operate smoothly

Is malfunction eliminated

Reinsert the wiring terminal of indoor fan

Is malfunction eliminated

It's the malfunction of main board. Replace the main board with the same model

Is malfunction eliminated

Yes

Test whether the voltage bewween motor

terminal 2 and 3 is 15VDC

Yes

Test whether there's voltage signal

beween motor terminal 2 and 4

Yes

It's the malfunction of motor. Replace the motor.

It's the malfunction of main board. Replace the main board with the same model

Is malfunction eliminated

It's the malfunction of main board. Replace the main board with the same model

Is malfunction

eliminated

End

Yes

Page 29

Installation and Maintenance

(3)Jumper cap malfunction (C5)

C5 is displayed

on the unit.

Is there jumper cap on the

controller?

Yes

Is the jumper cap inserted

incorrectly or improperly?

Replace the jumper

cap

No Yes

Yes

Install a matching

Re-insert the jumper

jumper cap.

Is the

malfunction

eliminated?

cap

Is the

malfunction

eliminated?

Is the

malfunction

eliminated?

The mainboard is

defined abnormal;

replace it

End

Yes

Page 30

Installation and Maintenance

(4) Communication malfunction (E6)

Is there incorrect match

between the main board and the

display panel or between the indoor

and outdoor boards?

Poor contact of any line may lead to communication malfuntion.

Is there

incorrect connection?

Note:

Before replacing mainboard of indoor unit, make sure the correct replacement is on hand. The following tests should be done:

a.Check if protective tube FUSE 1 has open circuit. If so, replace it with a protective tube of the same model.

Energize the unit and check buzzer sounds

. If not, the mainboard of indoor unit can’t be used. c.Energize the unit with display and check if all icons are displayed after energization and if the display is normal. If not, the main board can’t be used.

2.The mainboard for replacement shall has the same model with the original mainboard, so do the jumper cap.

3.The wiring and assembly methods shall also be the same with that of the original mainboard when replacing the mainboard.

Page 31

Installation and Maintenance

(1) Capacity charging malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor

Outdoor unit:

unit)

Main detection point:

● Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter;

● Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged

Malfunction diagnosis process:

Turn on the unit

and wait 1 minute

Use DC voltmeter

to measure the

voltage on the two

ends of electrolytic

capacitor

Voltage higher than 200V?

Measure the AC voltage between

L and N on wiring board

terminal XT(power supply)

Voltage within

210VAC~250VAC?

Shut down the power and wait 20 mi use DC voltmeter to measure the voltage on the two ends of capacitor (test3), until the voltage is lower than 20V

Check the

connection of reactor

(L in the Electrical

Wiring Diagram)

nutes; or

Fault with the voltage

testing circuit on

control panel AP1

Shut down the power and repair the power supply to restore the range 210VAC~250VAC

Replace the control

panel AP1

power on and restart the unit

If the fault is eliminated?

If the wiring of

is normal?

reactor L

Replace the control

panel AP1

End

Connect the reactor Laccording to Elec-

trical Wiring Diagram correctly

Re-energize and turn on the unit

If the fault is eliminated?

Page 32

Installation and Maintenance

(2) IPM protection, desynchronizing malfunction, phase current of compressor is overcurrent (AP1 below is control board of outdoor unit)

Main detection point:

If control board AP1 and compressor COMP is well connected? If they are loosened? If the connection sequence is correct?

Is voltage input in the normal range (Test the voltage between L, N of wiring board XT by DC voltage meter)?

If coil resistance of compressor is normal? Is compressor coil insulating to copper pipe well?

If the work load of unit is heavy? If radiating of unit is well?

If the refrigerant charging is appropriate?

Malfunction diagnosis process:

Page 33

Installation and Maintenance

Energize and

switch on

IPM protection

occurs after the

machine has run for

eriod of time?

Please confirm:

1. If the indoor and outdoor heat exchangers are dirty? If they are

obstructed by other

objects which affect

the heat exchange of indoor and out

2. If the indoor and outdoor fans are working normally?

3. If the environment temperature is too high, resulting in that the system

pressure is too high

and exceeds the

permissible range?

4. volume of refrigerant is too much, resulting in that the system pressure is too high?

5. Other conditions resulting in that the

system pressure

becomes too high.

Refer to the Electrical Wiring Diagram and check if the connection between AP1 and COMP is loose and if the connection order is correct.

door unit.

If the charge

Use AC voltmeter to measure the voltage between

Y N

terminal L and N on the wiring board XT)

Voltage between

the two ends of celectrolytic

capacitor is

higher than 250V

Stop the unit and disconnect the power supply. Then, check the connection of capacitor C2 according to Electrical Wiring Diagram.

Remove the wires on the two ends of capacitor C2. Then, use capacitance meter to measure the capacitor C2. Verify as per the Parameters Sheet.

If capacitor C2 is failed?

If there is any

abnormality

described above?

capacitor C2, until the

voltage is lower than 20V

control panel AP1

If the voltage

between terminal L and N on wiring

board XT is within 210VAC~250VAC?

Restart the unit. Before

protection occurs,

use DC voltmeter to

measure the voltage

between the two

ends of electrolytic

capacitor on control

panel AP1

The connection

of capacitor C2

is loose.

Stop the unit and disconnect the power supply. Wait 20 minutes, or use DC voltmeter to measure the voltage

between the two ends of

Replace the capacitor C2. Then, energize

and start the unit.

Replace the

Take corrective actions according to Technical

Service Manual, and

then energize and start

the unit.

Replace the

control panel AP1

Check the supply voltage and restore it to

210VAC~250VAC

If the unit can

work

normally?

Reconnect the capacitor C2 according to Electrical Wiring Diagram. Then, Restart the unit.

If the unit can

work normallv?

If the unit can

work normally?

If the unit can

work normally?

If the connection between AP1 and COMP is unsecure or the connection order is wrong?

Use ohmmeter to measure the resistance between the three terminals on compressor COMP, and compare the measurements with the

compressor resistance on

Service Manual.

Use ohmmeter to measure the resistance between the two

terminals of compressor

COMP and copper tube.

Connect the control panel

P1 and compressor COMP correctly according to the Electrical Wiring Diagram. Then, energize and start the unit.

If the

resistance is

normal?

Resistance higher

than 500MΩ?

Replace the

control panel

AP1

Replace the compressor

COMP

If the unit can

work

normally?

END

Page 34

Installation and Maintenance

(3) Diagnosis for anti-high temperature, overload protection (AP1 below is control board of outdoor unit)

Main detection point:

● If the outdoor ambient temperature is in normal range;

● If the indoor and outdoor fan is running normal;

● If the radiating environment of indoor and outdoor unit is well.

Malfunction diagnosis process:

Anti-high temperature,

overload protection

If the outdoor ambient temperature is

higher than 53 ºC?

Normal protection, please use

it after improve the outdoor

ambient temperature

After the unit de-

energized for 20min

If the radiating of outdoor

and indoor unit is well?

If the indoor and outdoor

fan work well?

Improve the

radiating

environment of

unit

1. Check if fan terminal OFAN is connected well

2. Test if resistance value of any two terminals is less than 1k

with ohmic meter

Replace fan

Replace

capacitor C1

control board

AP1

Replace

outdoor fan

End

Page 35

Installation and Maintenance

(4) Diagnosis for failure start up malfunction (AP1 below is control board of outdoor unit)

Main detection point:

● If the compressor wiring is correct?

● If the stop time of compressor is enough?

● If the compressor is damaged?

● If the refrigerant charging is too much?

Malfunction diagnosis process:

Energize the unit

and start it

If the stop time of compressor

is more than 3min?

If the stop time is not enough and the

high and low pressure of system is not balance , please start it after 3min

If the compressor wire COMP(UVW) is

well connected and connection sequence

is correct

If the refrigerant charging is

too much?

Charge the refrigerant according to service manual

Does the unit start

up normally?

Replace control board AP1

Improve the connection situation of control board AP1 and

compressor COMP, connect it with wiring diagram

Does the unit start

up normally?

If malfunction is

removed?

Replace the

compressor

End

Page 36

Installation and Maintenance

(5) Diagnosis for compressor synchronism (AP1 below is control board of outdoor unit)

Main detection point:

● If the system pressure is over-high?

● If the work voltage is over-low?

Malfunction diagnosis process:

Synchronism after

energize the unit

and start it

Synchronism

occurred during

operation

If the stop time of

compressor is more than

If the outdoor fan works

normally?

3min

If the compressor wire COMP(UVW) is well

connected, the connection sequence

forwards to clockwise direction?

Connect

wire well

Replace

control board

AP1

Remove

malfunction?

Replace

compressor

If the radiating of unit is

well?

If the input voltage of unit

is normal?

If the refrigerant is too

much?

Replace

control board

AP1

Remove

malfunction?

End

Check if the fan

terminal OFAN is

connected well

Improve the radiating of unit (clean heat exchanger and increase ventilation)

Start to run until the power resume normal voltage

Charge the refrigerant with service manual

Replace fan capacitor C1

Replace

outdoor fan

Replace

compressor

End

Page 37

Installation and Maintenance

(6) Diagnosis for overload and discharge malfunction (AP1 below is control board of outdoor unit)

Main detection point:

● If the electron expansion valve is connected well? Is the expansion valve damaged

● If the refrigerant is leakage?

● If the overload protector is damaged?

Malfunction diagnosis process:

After the unit

de-energized

for 20min

Replace

overload

protector SAT

If the overload protector SAT

is well connected?

Under ambient temperature, test the

resistance of overload protector with ohmic

If the wiring terminal FA of electron

expansion is well connected?

The resistance value of

firs t 4 lead fo ot an d the fifth lead fo ot is similar,

less than 100

Replace EKV

coil of electron

expansion valve

Connect wire

well with wiring diagram

Remove

malfunction?

Check refrigerant, if there is

leakage, please refer to

specification

Remove

malfunction?

Replace

control board

AP1

End

Page 38

Installation and Maintenance

(7) PFC (correction for power factor) malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit

)

Main detection point:

● Check if reactor (L) of outdoor unit and PFC capacity are damaged.

Malfunction diagnosis process:

Start

Check the connection wire of reactor (L) of

outdoor unit and

PFC capacity

Replace

If there is damaged

short circuit

Remove PFC capacity

and test resistance of

two terminals

If the resistance

value is 0

Cut the terminal of reactor,

test the resistance between two terminals of reactor with ohmic meter

Capacity is

circuit and

replace it

wire with circuit

short

connection

diagram

Re-energize

the unit and

start it

If the malfunction is

removed?

If the malfunction is

removed?

If there is damaged

control board

short circuit

Replace

AP1

End

Replace the

reactor

Re-

energize

the unit and

start it

If the malfunction is

removed?

Page 39

Installation and Maintenance

(8) Communication malfunction (AP1 below is control board of outdoor unit)

Main detection point:

● Check if the connection wire and the built-in wiring of indoor and outdoor unit is connected well and no damaged

● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is damaged

Malfunction diagnosis process:

Start

;

If the unit is operation

normal before malfunction

Check connection wire of indoor and

outdoor unit with

circuit diagram

Check built-

in wiring of indoor and

outdoor unit

Malfunction of

circuit is detected with control board

AP1 voltage

If the malfunction

is removed?

If the wiring is

damaged?

Check communication

circuit of outdoor unit

Connection

correct?

Check connection wire of indoor and

outdoor unit with

circuit diagram

If the malfunction

is removed?

Problem of

communication

circuit

Replace outdoor

mainboardAP11

If the

malfunction is

removed?

Replace indoor

board

End

Page 40

Installation and Maintenance

3.5 Troubleshooting for Normal Malfunction

1. Air Conditioner can't Be Started Up

Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting

No power supply, or poor connection for power plug

Wrong wire connection between indoor unit and outdoor unit, or poor connection for wiring terminals

Electric leakage for air conditioner

Model selection for air switch is improper

Malfunction of remote controller

2. Poor Cooling (heating) for Air Conditioner

Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Set temperature is improper Observe the set temperature on remote controller Adjust the set temperature Rotation speed of the IDU fan

motor is set too low Filter of indoor unit is blocked Check the lter to see it's blocked Clean the lter

Installation position for indoor unit and outdoor unit is improper

Refrigerant is leaking

Malfunction of 4-way valve Blow cold wind during heating Replace the 4-way valve

Malfunction of capillary

Flow volume of valve is

insufcient

Malfunction of horizontal louver Horizontal louver can’t swing Malfunction of the IDU fan motor The IDU fan motor can’t operate Malfunction of the ODU fan motor The ODU fan motor can't operate Malfunction of compressor Compressor can't operate

After energization, operation indicator isn’t bright and the buzzer can't give out sound

Under normal power supply circumstances, operation indicator isn't bright after energization

After energization, room circuit breaker trips off at once

After energization, air switch trips off Select proper air switch After energization, operation indicator is bright,

while no display on remote controller or buttons have no action.

Small wind blow Set the fan speed at high or medium

Check whether the installation postion is proper according to installation requirement for air conditioner

Discharged air temperature during cooling is higher than normal discharged wind temperature; Discharged air temperature during heating is lower than normal discharged wind temperature; Unit's pressure is much lower than regulated range

The pressure of valves is much lower than that

stated in the specication

Conrm whether it's due to power failure. If yes,

wait for power recovery. If not, check power supply circuit and make sure the power plug is connected well.

Check the circuit according to circuit diagram and connect wires correctly. Make sure all

wiring terminals are connected rmly

Make sure the air conditioner is grounded reliably Make sure wires of air conditioner is connected correctly Check the wiring inside air conditioner. Check whether the insulation layer of power cord is damaged; if yes, place the power cord.

Replace batteries for remote controller Repair or replace remote controller

Adjust the installation position, and install the rainproof and sunproof for outdoor unit

Find out the leakage causes and deal with it. Add refrigerant.

Replace the capillary

Open the valve completely Refer to point 3 of maintenance method for

details Refer to troubleshooting for H6 for maintenance

method in details Refer to point 4 of maintenance method for

details Refer to point 5 of maintenance method for

details

3. Horizontal louver can't Swing

Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Wrong wire connection, or poor

connection Stepping motor is damaged Stepping motor can't operate Repair or replace stepping motor Main board is damaged

Check the wiring status according to circuit diagram

Others are all normal, while horizontal louver can't operate

Connect wires according to wiring diagram to make sure all wiring terminals are connected

rmly

Replace the main board with the same model

Page 41

Installation and Maintenance

4. ODU Fan Motor can't Operate

Possible causes Discriminating method (air conditioner status) Troubleshooting

Wrong wire connection, or poor connection

Capacity of the ODU fan motor is damaged

Power voltage is a little low or high

Motor of outdoor unit is damaged

5. Compressor can't Operate

Possible causes Discriminating method (air conditioner status) Troubleshooting

Wrong wire connection, or poor connection

Capacity of compressor is damaged

Power voltage is a little low or high

Coil of compressor is burnt out Cylinder of compressor is blocked Compressor can't operate Repair or replace compressor

Check the wiring status according to circuit diagram

Measure the capacity of fan capacitor with an

universal meter and nd that the capacity is out of

the deviation range indicated on the nameplate of fan capacitor. Use universal meter to measure the power supply voltage. The voltage is a little high or low When unit is on, cooling/heating performance is bad and ODU compressor generates a lot of noise and heat.

Check the wiring status according to circuit diagram

Measure the capacity of fan capacitor with an

universal meter and nd that the capacity is out of

the deviation range indicated on the nameplate of fan capacitor. Use universal meter to measure the power supply voltage. The voltage is a little high or low Use universal meter to measure the resistance between compressor terminals and it's 0

Connect wires according to wiring diagram to make sure all wiring terminals are connected

rmly

Replace the capacity of fan

Suggest to equip with voltage regulator

Change compressor oil and refrigerant. If no better, replace the compressor with a new one

Connect wires according to wiring diagram to make sure all wiring terminals are connected

rmly

Replace the compressor capacitor

Suggest to equip with voltage regulator

Repair or replace compressor

6. Air Conditioner is leaking

Possible causes Discriminating method (air conditioner status) Troubleshooting Drain pipe is blocked Water leaking from indoor unit Drain pipe is broken Water leaking from drain pipe Replace drain pipe Wrapping is not tight

7. Abnormal Sound and Vibration

Possible causes Discriminating method (air conditioner status) Troubleshooting When turn on or turn off the unit, the panel and other parts will expand and there's abnormal sound When turn on or turn off the unit, there's abnormal sound due

to ow of refrigerant inside air

conditioner Foreign objects inside the indoor unit or there're parts touching together inside the indoor unit Foreign objects inside the outdoor unit or there're parts touching together inside the outdoor unit Short circuit inside the magnetic coil

Abnormal shake of compressor Outdoor unit gives out abnormal sound

Abnormal sound inside the compressor

Water leaking from the pipe connection place of indoor unit

There's the sound of "PAPA"

Water-running sound can be heard

There's abnormal sound fro indoor unit

There's abnormal sound fro outdoor unit

During heating, the way valve has abnormal electromagnetic sound

Abnormal sound inside the compressor

Eliminate the foreign objects inside the drain pipe

Wrap it again and bundle it tightly

Normal phenomenon. Abnormal sound will disappear after a few minutes.

Remove foreign objects. Adjust all parts' position of indoor unit, tighten screws and stick damping plaster between connected parts Remove foreign objects. Adjust all parts' position of outdoor unit, tighten screws and stick damping plaster between connected parts

Replace magnetic coil Adjust the support foot mat of compressor,

tighten the bolts If add too much refrigerant during maintenance, please reduce refrigerant properly. Replace compressor for other circumstances.

Page 42

Installation and Maintenance

Appendix:

Appendix 1: Reference Sheet of Celsius and Fahrenheit

Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature

Fahrenheit

display

temperature

（℉）

61 60.8 16 69/70 69.8 21 78/79 78.8 26 62/63 62.6 17 71/72 71.6 22 80/81 80.6 27 64/65 64.4 18 73/74 73.4 23 82/83 82.4 28 66/67 66.2 19 75/76 75.2 24 84/85 84.2 29

68 68 20 77 77 25 86 86 30

Ambient temperature

Fahrenheit

display

temperature

（℉）

32/33 32 0 55/56 55.4 13 79/80 78.8 26 34/35 33.8 1 57/58 57.2 14 81 80.6 27

36 35.6 2 59/60 59 15 82/83 82.4 28 37/38 37.4 3 61/62 60.8 16 84/85 84.2 29 39/40 39.2 4 63 62.6 17 86/87 86 30 41/42 41 5 64/65 64.4 18 88/89 87.8 31 43/44 42.8 6 66/67 66.2 19 90 89.6 32

45 44.6 7 68/69 68 20 91/92 91.4 33 46/47 46.4 8 70/71 69.8 21 93/94 93.2 34 48/49 48.2 9 72 71.6 22 95/96 95 35 50/51 50 10 73/74 73.4 23 97/98 96.8 36 52/53 51.8 11 75/76 75.2 24 99 98.6 37

54 53.6

Fahrenheit

（℉）

Celsius

（℃）

Celsius

（℃）

12 77/78 77 25

Fahrenheit

display

temperature

（℉）

Fahrenheit

display

temperature

（℉）

Fahrenheit

（℉）

Fahrenheit

（℉）

Celsius

（℃）

Fahrenheit

display

temperature

（℉）

Fahrenheit

display

temperature

（℉）

Fahrenheit

（℉）

Fahrenheit

（℉）

Celsius

（℃）

Appendix 2: Conguration of Connection Pipe

1.Standard length of connection pipe

● 16.40ft, 24.61ft, 26.25ft.

2.Min. length of connection pipe is 9.84ft.

3.Max. length of connection pipe and max. high difference.

4.The additional refrigerant oil and refrigerant charging required after prolonging connection pipe

● After the length of connection pipe is prolonged for 32.81ft at the

basis of standard length, you should add 5ml of refrigerant oil for each additional 16.40ft of connection pipe.

● The calculation method of additional refrigerant charging amount (on

the basis of liquid pipe):

● When the length of connection pipe is above 16.40ft, add refrigerant according to the prolonged length of liquid pipe. The

additional refrigerant charging amount per meter is different according to the diameter of liquid pipe. See the following sheet.

● Additional refrigerant charging amount = prolonged length of liquid pipe X additional refrigerant charging amount per meter

Additional refrigerant charging amount for R22, R407C, R410A and R134a

Diameter of connection pipe Outdoor unit throttle

Liquid pipe(inch) Gas pipe(inch) Cooling only(oz/ft.) Cooling and heating(oz/ft.)

Ф1/4 Ф3/8or Ф1/2 0.2 0.2

Ф1/4 or Ф3/8 Ф5/8 or Ф3/4 0.2 0.2

Ф1/2 Ф3/4 or Ф7/8 0.3 1.3 Ф5/8 Ф1 or Ф1 1/4 0.7 1.3 Ф3/4 / 2.7 2.7 Ф7/8 / 3.8 3.8

Cooling capacity

5000 Btu/h(1465 W) 49.21ft 16.40ft 7000 Btu/h(2051 W) 49.21ft 16.40ft

9000 Btu/h(2637 W) 49.21ft 32.81ft 12000 Btu/h(3516 W) 65.62ft 32.81ft 18000 Btu/h(5274 W) 80.02ft 32.81ft 24000 Btu/h(7032 W) 80.02ft 32.81ft 28000 Btu/h(8204 W) 98.43ft 32.81ft

36000 Btu/h(10548 W) 98.43ft 65.62ft 42000 Btu/h(12306 W) 98.43ft 65.62ft 48000 Btu/h(14064 W) 98.43ft 65.62ft

Max length of

connection pipe

Max height

difference

Page 43

Installation and Maintenance

The length is equal

Smooth surface

Downwards

Pipe

Shaper

Pipe

Appendix 3: Pipe Expanding Method

Note:

Improper pipe expanding is the main cause of refrigerant leakage.Please expand the pipe according to the following steps:

A:Cut the pip

● Conrm the pipe length according to the distance of indoor unit and outdoor unit.

● Cut the required pipe with pipe cutter.

B:Remove the burrs

● Remove the burrs with shaper and prevent the burrs from getting into the pipe.

C:Put on suitable insulating pipe

D:Put on the union nut

● Remove the union nut on the indoor connection pipe and outdoor valve; install

the union nut on the pipe.

E:Expand the port

● Expand the port with expander.

Note:

● "A" is different according to the diameter, please refer to the sheet below:

Outer diameter(inch)

A(inch)

Max Min

Ф1/4 2/39 1/36 Ф3/8 1/16 1/51 Ф1/2 1/14 1/51 Ф5/8 5/53 2/23

Union pipe

Expander

Pipe cutter

Leaning Uneven Burr

Hard mold

Pipe

F:Inspection

● Check the quality of expanding port. If there is any blemish, expand the

port again according to the steps above.

Improper expanding

damaged

leaning

crack uneven

surface

thicknes

Page 44

Installation and Maintenance

Appendix 4: List of Resistance for Temperature Sensor

Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K)

Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ)

-2.2 138.1 68 18.75 138.2 3.848 208.4 1.071

-0.4 128.6 69.8 17.93 140 3.711 210.2 1.039

1.4 121.6 71.6 17.14 141.8 3.579 212 1.009

3.2 115 73.4 16.39 143.6 3.454 213.8 0.98 5 108.7 75.2 15.68 145.4 3.333 215.6 0.952

6.8 102.9 77 15 147.2 3.217 217.4 0.925

8.6 97.4 78.8 14.36 149 3.105 219.2 0.898

10.4 92.22 80.6 13.74 150.8 2.998 221 0.873

12.2 87.35 82.4 13.16 152.6 2.896 222.8 0.848 14 82.75 84.2 12.6 154.4 2.797 224.6 0.825

15.8 78.43 86 12.07 156.2 2.702 226.4 0.802

17.6 74.35 87.8 11.57 158 2.611 228.2 0.779

19.4 70.5 89.6 11.09 159.8 2.523 230 0.758

21.2 66.88 91.4 10.63 161.6 2.439 231.8 0.737 23 63.46 93.2 10.2 163.4 2.358

24.8 60.23 95 9.779 165.2 2.28 235.4 0.697

26.6 57.18 96.8 9.382 167 2.206 237.2 0.678

28.4 54.31 98.6 9.003 168.8 2.133 239 0.66

30.2 51.59 100.4 8.642 170.6 2.064 240.8 0.642 32 49.02 102.2 8.297 172.4 1.997 242.6 0.625

33.8 46.6 104 7.967 174.2 1.933 244.4 0.608

35.6 44.31 105.8 7.653 176 1.871 246.2 0.592

37.4 42.14 107.6 7.352 177.8 1.811 248 0.577

39.2 40.09 109.4 7.065 179.6 1.754 249.8 0.561 41 38.15 111.2 6.791 181.4 1.699 251.6 0.547

42.8 36.32 113 6.529 183.2 1.645 253.4 0.532

44.6 34.58 114.8 6.278 185 1.594 255.2 0.519

46.4 32.94 116.6 6.038 186.8 1.544 257 0.505

48.2 31.38 118.4 5.809 188.6 1.497 258.8 0.492 50 29.9 120.2 5.589 190.4 1.451 260.6 0.48

51.8 28.51 122 5.379 192.2 1.408 262.4 0.467

53.6 27.18 123.8 5.197

55.4 25.92 125.6 4.986 195.8 1.322 266 0.444

57.2 24.73 127.4 4.802 197.6 1.282 267.8 0.433 59 23.6 129.2 4.625 199.4 1.244 269.6 0.422

60.8 22.53 131 4.456 201.2 1.207 271.4 0.412

62.6 21.51 132.8 4.294 203 1.171 273.2 0.401

64.4 20.54 134.6 4.139 204.8 1.136 275 0.391

66.2 19.63 136.4 3.99 206.6 1.103 276.8 0.382

194 1.363 264.2 0.456

233.6 0.717

Page 45

Installation and Maintenance

Resistance Table of Tube Temperature Sensors for Outdoor and Indoor(20K)

Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ)

-2.2 181.4 68 25.01 138.2 5.13 208.4 1.427

-0.4 171.4 69.8 23.9 140 4.948 210.2 1.386

1.4 162.1 71.6 22.85 141.8 4.773 212 1.346

3.2 153.3 73.4 21.85 143.6 4.605 213.8 1.307 5 145 75.2 20.9 145.4 4.443 215.6 1.269

6.8 137.2 77 20 147.2 4.289 217.4 1.233

8.6 129.9 78.8 19.14 149 4.14 219.2 1.198

10.4 123 80.6 18.13 150.8 3.998 221 1.164

12.2 116.5 82.4 17.55 152.6 3.861 222.8 1.131 14 110.3 84.2 16.8 154.4 3.729 224.6 1.099

15.8 104.6 86 16.1 156.2 3.603 226.4 1.069

17.6 99.13 87.8 15.43 158 3.481 228.2 1.039

19.4 94 89.6 14.79 159.8 3.364 230 1.01

21.2 89.17 91.4 14.18 161.6 3.252 231.8 0.983 23 84.61 93.2 13.59 163.4 3.144

24.8 80.31 95 13.04 165.2 3.04 235.4 0.93

26.6 76.24 96.8 12.51 167 2.94 237.2 0.904

28.4 72.41 98.6 12 168.8 2.844 239 0.88

30.2 68.79 100.4 11.52 170.6 2.752 240.8 0.856 32 65.37 102.2 11.06 172.4 2.663 242.6 0.833

33.8 62.13 104 10.62 174.2 2.577 244.4 0.811

35.6 59.08 105.8 10.2 176 2.495 246.2 0.77

37.4 56.19 107.6 9.803 177.8 2.415 248 0.769

39.2 53.46 109.4 9.42 179.6 2.339 249.8 0.746 41 50.87 111.2 9.054 181.4 2.265 251.6 0.729

42.8 48.42 113 8.705 183.2 2.194 253.4 0.71

44.6 46.11 114.8 8.37 185 2.125 255.2 0.692

46.4 43.92 116.6 8.051 186.8 2.059 257 0.674

48.2 41.84 118.4 7.745 188.6 1.996 258.8 0.658 50 39.87 120.2 7.453 190.4 1.934 260.6 0.64

51.8 38.01 122 7.173 192.2 1.875 262.4 0.623

53.6 36.24 123.8 6.905

55.4 34.57 125.6 6.648 195.8 1.736 266 0.592

57.2 32.98 127.4 6.403 197.6 1.71 267.8 0.577 59 31.47 129.2 6.167 199.4 1.658 269.6 0.563

60.8 30.04 131 5.942 201.2 1.609 271.4 0.549

62.6 28.68 132.8 5.726 203 1.561 273.2 0.535

64.4 27.39 134.6 5.519 204.8 1.515 275 0.521

66.2 26.17 136.4 5.32 206.6 1.47 276.8 0.509

194 1.818 264.2 0.607

233.6 0.956

Page 46

Installation and Maintenance

Resistance Table of Discharge Temperature Sensor for Outdoor(50K)

Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ)

-20.2 853.5 50 98 120.2 18.34 190.4 4.754

-18.4 799.8 51.8 93.42 122 17.65 192.2 4.609

-16.6 750 53.6 89.07 123.8 16.99 194 4.469

-14.8 703.8 55.4 84.95 125.6 16.36 195.8 4.334

-13 660.8 57.2 81.05 127.4 15.75 197.6 4.204

-11.2 620.8 59 77.35 129.2 15.17 199.4 4.079

-9.4 580.6 60.8 73.83 131 14.62 201.2 3.958

-7.6 548.9 62.6 70.5 132.8 14.09 203 3.841

-5.8 516.6 64.4 67.34 134.6 13.58 204.8 3.728

-4 486.5 66.2 64.33 136.4 13.09 206.6 3.619

-2.2 458.3 68 61.48 138.2 12.62 208.4 3.514

-0.4 432 69.8 58.77 140 12.17 210.2 3.413

1.4 407.4 71.6 56.19 141.8 11.74 212 3.315

3.2 384.5 73.4 53.74 143.6 11.32 213.8 3.22 5 362.9 75.2 51.41 145.4 10.93

6.8 342.8 77 49.19 147.2 10.54 217.4 3.04

8.6 323.9 78.8 47.08 149 10.18 219.2 2.955

10.4 306.2 80.6 45.07 150.8 9.827 221 2.872

12.2 289.6 82.4 43.16 152.6 9.489 222.8 2.792 14 274 84.2 41.34 154.4 9.165 224.6 2.715

15.8 259.3 86 39.61 156.2 8.854 226.4 2.64

17.6 245.6 87.8 37.96 158 8.555 228.2 2.568

19.4 232.6 89.6 36.38 159.8 8.268 230 2.498

21.2 220.5 91.4 34.88 161.6 7.991 231.8 2.431 23 209 93.2 33.45 163.4 7.726 233.6 2.365

24.8 198.3 95 32.09 165.2 7.47 235.4 2.302

26.6 199.1 96.8 30.79 167 7.224 237.2 2.241

28.4 178.5 98.6 29.54 168.8 6.998 239 2.182

30.2 169.5 100.4 28.36 170.6 6.761 240.8 2.124 32 161 102.2 27.23 172.4 6.542 242.6 2.069

33.8 153 104 26.15 174.2 6.331 244.4 2.015

35.6 145.4 105.8 25.11

37.4 138.3 107.6 24.13 177.8 5.933 248 1.912

39.2 131.5 109.4 23.19 179.6 5.746 249.8 1.863 41 125.1 111.2 22.29 181.4 5.565 251.6 1.816

42.8 119.1 113 21.43 183.2 5.39 253.4 1.77

44.6 113.4 114.8 20.6 185 5.222 255.2 1.725

46.4 108 116.6 19.81 186.8 5.06 257 1.682

48.2 102.8 118.4 19.06 188.6 4.904 258.8 1.64

176 6.129 246.2 1.963

215.6 3.129

Page 47

Page 48

Product improvement, specifications and appearance in this manual are subject to change without prior notice.

LIT - 12012177

Johnson Controls Y Seroes, DHY24NWB21S, DHY09CSB21S, DHY12CSB21S, DHY18CSB21S Installation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual