Comfort Star CXH09CD User manual

Revision A: 170816, Content updated.

Model Numbers:

CXH09CD CXH12CD

CXH24CD CXH18CD

FoR HI-HEAt SERIES(CXH)

SERVICE MANUAL

Table of Contents

1. Precaution

2. Part Names And Functions

3. Dimension

4. Refrigerant Cycle Diagram

5. Wiring Diagram

6. Installation Details

7. Operation Characteristics

8. Electronic Function

9. Troubleshooting

10. Disassembly Instructions

CONTENTS

1. Precaution ..................................................................................................................................................... 1

1.1 Safety Precaution ........................................................................................................................... 1

1.2 Warning ...........................................................................................................................................1

2. Part Names And Functions ..........................................................................................................................4

2.1 Model Names of Indoor/Outdoor units ........................................................................................... 4

2.2 Part names of Indoor/Outdoor units ...............................................................................................5

3. Dimension ..................................................................................................................................................... 6

3.1 Indoor Unit ...................................................................................................................................... 6

3.2 Outdoor Unit ................................................................................................................................... 8

4. Refrigerant Cycle Diagram .......................................................................................................................... 9

5. Wiring Diagram ........................................................................................................................................... 10

6 Installation Details ....................................................................................................................................... 10

6.1 Wrench torque sheet for installation ............................................................................................ 10

6.2 Connecting the cables ..................................................................................................................10

6.3 Pipe length and the elevation ....................................................................................................... 10

6.4 Installation for the first time ...........................................................................................................11

6.5 Adding the refrigerant after running the system for many years ................................................. 11

6.6 Re-installation while the indoor unit need to be repaired ............................................................ 12

6.7 Re-installation while the outdoor unit need to be repaired .......................................................... 12

7. Operation Characteristics ..........................................................................................................................14

8. Electronic Function .................................................................................................................................... 15

8.1 Abbreviation .................................................................................................................................. 15

8.2 Display function ............................................................................................................................ 15

8.3 Main Protection .............................................................................................................................16

8.4 Operation Modes and Functions ..................................................................................................17

9. Troubleshooting ..........................................................................................................................................22

9.1 Indoor Unit Error Display .............................................................................................................. 23

9.2 Outdoor unit error display .............................................................................................................24

9.3 Diagnosis and Solution .................................................................................................................28

10 Disassembly Instructions ......................................................................................................................... 57

10.1 Indoor unit ...................................................................................................................................57

10.2 Outdoor unit ................................................................................................................................ 61

1. Precaution

1.1 Safety Precaution

To prevent injury to the user or other

people and property damage, the following

instructions must be followed.

Incorrect operation due to ignoring

instruction will cause harm or damage.

Before service the unit, be sure to

read this service manual at first.

1.2 Warning

Installation

Do not use a defective or underrated

circuit breaker. Use this appliance on a

dedicated circuit.

There is risk of fire or electric shock.

For electrical work, contact the dealer,

seller, a qualified electrician, or an

authorized service center.

Do not disassemble or repair the product,

there is risk of fire or electric shock.

Always ground the product.

There is risk of fire or electric shock.

Install the panel and the cover of

control box securely.

There is risk of fire of electric shock.

Always install a dedicated circuit and

breaker.

Improper wiring or installation may cause

electric shock.

Use the correctly rated breaker of

fuse.

There is risk of fire or electric shock.

Do not modify or extend the power

cable.

There is risk of fire or electric shock.

Do not install, remove, or reinstall the

unit by yourself (customer).

There is risk of fire, electric shock, explosion,

or injury.

Be caution when unpacking and

installing the product.

Sharp edges could cause injury, be especially

careful of the case edges and the fins on the

condenser and evaporator.

For installation, always contact the

dealer or an authorized service center.

Do not install the product on a

defective installation stand.

Be sure the installation area does not

deteriorate with age.

If the base collapses, the air conditioner could

fall with it, causing property damage, product

failure, and personal injury.

Do not let the air conditioner run for a

long time when the humidity is very high

and a door or a window is left open.

Take care to ensure that power cable

could not be pulled out or damaged during

operation.

There is risk of fire or electric shock.

Do not place anything on the power

cable.

There is risk of fire or electric shock.

Do not plug or unplug the power

supply plug during operation.

There is risk of fire or electric shock.

Do not touch (operation) the product

with wet hands.

Do not place a heater or other

appliance near the power cable.

There is risk of fire and electric shock.

Do not allow water to run into

electrical parts.

It may cause fire, failure of the product, or

electric shock.

Do not store or use flammable gas or

combustible near the product.

There is risk of fire or failure of product.

Do not use the product in a tightly

closed space for a long time.

Oxygen deficiency could occur.

When flammable gas leaks, turn off

the gas and open a window for ventilation

before turn the product on.

If strange sounds or smoke comes

from product, turn the breaker off or

disconnect the power supply cable.

There is risk of electric shock or fire.

Stop operation and close the window

in storm or hurricane. If possible, remove

the product from the window before the

hurricane arrives.

There is risk of property damage, failure of

product, or electric shock.

Do not open the inlet grill of the

product during operation. (Do not touch the

electrostatic filter, if the unit is so equipped.)

There is risk of physical injury, electric shock,

or product failure.

When the product is soaked, contact

an authorized service center.

There is risk of fire or electric shock.

Be caution that water could not enter

the product.

There is risk of fire, electric shock, or product

damage.

Ventilate the product from time to

time when operating it together with a stove

etc.

There is risk of fire or electric shock.

Turn the main power off when

cleaning or maintaining the product.

There is risk of electric shock.

When the product is not be used for a

long time, disconnect the power supply plug

or turn off the breaker.

There is risk of product damage or failure, or

unintended operation.

Take care to ensure that nobody

could step on or fall onto the outdoor unit.

This could result in personal injury and

product damage.

CAUTION

Always check for gas (refrigerant)

leakage after installation or repair of

product.

Low refrigerant levels may cause failure of

product.

Install the drain hose to ensure that

water is drained away properly.

A bad connection may cause water leakage.

Keep level even when installing the

product.

It can avoid vibration of water leakage.

Do not install the product where the

noise or hot air from the outdoor unit could

damage the neighborhoods.

It may cause a problem for your neighbors.

Use two or more people to lift and

transport the product.

Do not install the product where it will

be exposed to sea wind (salt spray) directly.

It may cause corrosion on the product.

Corrosion, particularly on the condenser and

evaporator fins, could cause product

malfunction or inefficient operation.

Operational

Do not expose the skin directly to

cool air for long time. (Do not sit in the

draft).

Do not use the product for special

purposes, such as preserving foods, works

of art etc. It is a consumer air conditioner,

not a precision refrigerant system.

There is risk of damage or loss of property.

Do not block the inlet or outlet of air

flow.

Use a soft cloth to clean. Do not use

harsh detergents, solvents, etc.

There is risk of fire, electric shock, or damage

to the plastic parts of the product.

Do not touch the metal parts of the

product when removing the air filter. They

are very sharp.

Do not step on or put anything on the

product. (outdoor units)

Always insert the filter securely.

Clean the filter every two weeks or more

often if necessary.

A dirty filter reduces the efficiency of the air

conditioner and could cause product

malfunction or damage.

Do not insert hands or other objects

through air inlet or outlet while the product

is operated.

Do not drink the water drained from

the product.

Use a firm stool or ladder when

cleaning or maintaining the product.

Be careful and avoid personal injury.

Replace the all batteries in the remote

control with new ones of the same type. Do

not mix old and new batteries or different

types of batteries.

There is risk of fire or explosion.

Do not recharge or disassemble the

batteries. Do not dispose of batteries in a

fire.

They may burn of explode.

If the liquid from the batteries gets

onto your skin or clothes, wash it well with

clean water. Do not use the remote of the

batteries have leaked.

2. Part Names And Functions

2.1 Model Names of Indoor/Outdoor units

Series Capacity Indoor units Outdoor units

9k CXH09CD(I) CXH09CD(O)

12k CXH12CD(I) CXH12CD(O)

18k CXH18CD(I) CXH18CD(O)

24k CXH24CD(I) CXH24CD(O)

2.2 Part names of Indoor/Outdoor units

3. Dimension

3.1 Indoor Unit

W D

Model W D H

CXH09CD

CXH12CD

835mm

(32.9in)

198mm

(7.8in)

280mm

(11.0in)

CXH18CD 990mm

(39.0in)

218mm

(8.6in)

315mm

(12.4in)

CXH24CD 1186mm

(46.7in)

258mm

(10.2in)

343mm

(13.5in)

For CXH09CD, CXH12CD,

For CXH18CD ,

For CXH24CD ,

3.2 Outdoor Unit

More than 60cm(23.6in)

More than 70cm(27.6in)

More than 30cm(11.8in)

More than 60cm(23.6in)

(Service space)

Fence or

obstacles

More than 30cm(11.8in)

Note: The above drawing is only for reference. The appearance of your units may be different.

Model W in(mm) D in(mm) H in(mm) W1 in(mm) A in(mm) B in(mm)

CXH09CD

CXH12CD(O) 31.5(800) 13.11(333) 21.81(554) 34.25(870) 20.24(514) 13.39(340)

CXH18CD(O) 33.27(845) 14.29(363) 27.64(702) 35.98(914) 21.26(540) 13.78(350)

CXH24CD(O) 37.24(946) 16.14(410) 31.89(810) 40.55(1030) 26.50(673) 15.87(403)

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