Comfort Star CHF12CA(I) Repair manual

IMPORTANT NOTE:
Read this manual carefully before installing
or operating your new air conditioning
unit. Make sure to save this manual for
future reference.
DUCTLESS MINI-SPLITS
Outdoor Unit Model
CZP12CA(O)
CZP09CD(O)
CZP12CD(O)
CZP18CD(O)
CZP24CD(O)
CHF09CD(O)
CHF12CD(O)
CHF18CD(O)
CHF24CD(O)
Indoor Unit Model
CHF12CA(I)
CHF09CD(I)
CHF12CD(I)
CHF18CD(I)
CHF24CD(I)
Owner’s Manual &
Installation Manual
eAir LLC
12201 N.W. 107 Avenue, Medley, FL 33178
www.comfortstarusa.com

Unit Specifications and Features ...........................................................08
Owner’s Manual
Table of Contents
Safety Precautions ...............................................................................04
Care and Maintenance......................................................................12
Troubleshooting.................................................................................14
1. Indoor unit display.........................................................................................................................08
2. Operating temperature..................................................................................................................09
3. Other features ..............................................................................................................................10
4. Setting angle of airflow.................................................................................................................11
5. Manual operation (without Remote)..............................................................................................11

Installation Manual
Accessories...........................................................................................17
Unit Parts.............................................................................................19
Indoor Unit Installation.......................................................................20
1. Select installation location..............................................................................................................20
2. Attach mounting plate to wall........................................................................................................20
3. Drill wall hole for connective piping................................................................................................21
4. Prepare refrigerant piping...............................................................................................................22
5. Connect drain hose........................................................................................................................24
6. Connect signal and power cables...................................................................................................25
7. Wrap piping and cables..................................................................................................................26
8. Mount indoor unit.........................................................................................................................27
Outdoor Unit Installation.........................................................................27
1. Select installation location..............................................................................................................27
2. Install drain joint............................................................................................................................28
3. Anchor outdoor unit......................................................................................................................28
4. Connect signal and power cables...................................................................................................30
Refrigerant Piping Connection.........................................................31
A. Note on Pipe Length....................................................................................................................31
B.
Connection Instructions –Refrigerant Piping.................................................................................31
1. Cut pipe.................................................................................................................................31
2. Remove burrs.........................................................................................................................32
3. Flare pipe ends.......................................................................................................................32
4. Connect pipes........................................................................................................................32
Air Evacuation...................................................................................34
1. Evacuation Instructions................................................................................................................34
2. Note on Adding Refrigerant.........................................................................................................35
Electrical and Gas Leak Checks........................................................36
Test Run.............................................................................................37
Packing and unpacking the unit .....................................................38
Installation Summary - Indoor Unit ..................................................18

Page 4 
Safety Precautions
Read Safety Precautions Before Operation and Installation
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
Incorrect installation due to ignoring instructions can cause serious damage or injury.
WARNING
This appliance can be used by children aged from 8 years and above and persons with reduced
This appliance is not intended for use by persons(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety. Children
should be supervised to ensure that they do not play with the appliance.
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision(European Union countries).
WARNINGS FOR PRODUCT USE
•
If an abnormal situation arises (like a burning smell), immediately turn off the unit and disconnect
the power. Call your dealer for instructions to avoid electric shock, fire or injury.
•
Do not
insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since
the fan may be rotating at high speeds.
•
Do not
use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause
fire or combustion.
•
Do not
operate the air conditioner in places near or around combustible gases. Emitted gas may
collect around the unit and cause explosion.
•
Do not
•
•
Do not
expose your body directly to cool air for a prolonged period of time.
•
•
If the air conditioner is used together with burners or other heating devices, thoroughly ventilate
the room to avoid oxygen deficiency.
Safety Precautions
Do not
allow children to play with the air conditioner. Children must be supervised around the
unit at all times.
operate your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
• Do not
clean the air conditioner with combustible cleaning agents. Combustible cleaning agents
can cause fire or deformation.
CLEANING AND MAINTENANCE WARNINGS
• Turn off the device and disconnect the power before cleaning. Failure to do so can cause
electrical shock.
• Do not
clean the air conditioner with excessive amounts of water.
WARNING
This symbol indicates the possibility
of personnel injury or loss of life.
CAUTION
This symbol indicates the possibility of
property damage or serious consequences.

Page 5 
Safety Precautions
CAUTION
• Turn off the air conditioner and disconnect the power if you are not going to use it for a long time.
• Turn off and unplug the unit during storms.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• Do not allow the air conditioner to operate for long periods of time with doors or windows open,
or if the humidity is very high.
ELECTRICAL WARNINGS
• Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer , its service agent or similarly qualified persons in order to avoid a hazard.
• Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty
plugs can cause fire or electric shock.
•
•
•
•
•
•
•
Do not pull power cord to unplug unit. Hold the plug firmly and pull it from the outlet. Pulling
directly on the cord can damage it, which can lead to fire or electric shock.
Do not modify the length of the power supply cord or use an extension cord to power the unit.
Do not share the electrical outlet with other appliances. Improper or insufficient power supply
can cause fire or electrical shock.
If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm
clearances in all poles, and have a leakage current that may exceed 10mA, the residual current
device(RCD) having a rated residual operating current not exceeding 30mA, and disconnection
must be incorporated in the fixed wiring in accordance with the wiring rules.
For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces
from damaging the terminal. Improper electrical connections can overheat and cause fire, and may
also cause shock.
All electrical connections must be made according to the Electrical Connection
Diagram located on the panels of the indoor and outdoor units.
All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection
points on the terminal to heat up, catch fire, or cause electrical shock.
The product must be properly grounded at the time of installation, or electrical shock may occur.
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.
The specifications of the fuse are printed on the circuit board ,such as :
T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, T20A/250VAC, T30A/250VAC,etc.
NOTE: For the units using R32 or R290 refrigerant , only the blast-proof ceramic fuse can be used.
UV-C lamp(Applicable to the unit contains an UV-C lamp only)
This appliance contains a UV-C lamp. Read the maintenance instructions before opening the appliance.
1. Do not operate UV-C lamps outside of the appliance.
2. Appliances that are obviously damaged must not be operated.
3. Unintended use of the appliance or damage to the housing may result in the escape of dangerous UV-C
radiation. UV-C radiation may, even in small doses, cause harm to the eyes and skin.

Page 6 
Safety Precautions
WARNINGS FOR PRODUCT INSTALLATION
1. Installation must be performed by an authorized dealer or specialist. Defective installation can
cause water leakage, electrical shock, or fire.
2. Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or fire.
(In North America,installation must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.)
3.
Contact an authorized service technician for repair or maintenance of this unit. This appliance
shall be installed in accordance with national wiring regulations.
4.
Only use the included accessories, parts, and specified parts for installation. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
5.
6.
Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may drop and cause
serious injury and damage.
7.
8.
9.
10.
11.
Do not turn on the power until all work has been completed.
When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and reinstallation of the unit.
How to install the appliance to its support, please read the information for details in "indoor unit
installation" and "outdoor unit installation" sections .
For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combustible materials.
Do not install the unit in a location that may be exposed to combustible gas leaks. If
combustible
gas accumulates around the unit, it may cause fire.
Install drainage piping according to the instructions in this manual. Improper drainage may
cause water damage to your home and property.
Note about Fluorinated Gasses(Not applicable to the unit using R290 Refrigerant)
1.
This air-conditioning unit contains fluorinated greenhouse gasses. For specific information on the
type of gas and the amount, please refer to the relevant label on the unit itself or
the
“Owner's Manual - Product Fiche ” in the packaging of the outdoor unit. (European
Union products only)
.
2. Installation, service, maintenance and repair of this unit must be performed by a certified
technician.
3. Product uninstallation and recycling must be performed by a certified technician.
4. For equipment that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2
equivalent or more, but of less than 50 tonnes of CO2equivalent, If the system has a leak-
detection system installed, it must be checked for leaks at least every 24 months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
4. Before opening doors and access panels bearing the ULTRAVIOLET RADIATION hazard symbol
for the conducting USER MAINTENANCE, it is recommended to disconnect the power.
5. The UV-C lamp can not be cleaned, repaired and replaced.
6. UV-C BARRIERS bearing the ULTRAVIOLET RADIATION hazard symbol should not be removed.
WARNING
This appliance contains an UV emitter. Do not stare at the light source.

Page 7 
Safety Precautions
European Disposal Guidelines
This appliance contains refrigerant and other potentially hazardous materials. When disposing of
this appliance, the law requires special collection and treatment. Do not dispose of this product as
household waste or unsorted municipal waste.
When disposing of this appliance, you have the following options:
•Dispose of the appliance at designated municipal electronic waste collection facility.
•When buying a new appliance, the retailer will take back the old appliance free of charge.
•The manufacturer will take back the old appliance free of charge.
•Sell the appliance to certified scrap metal dealers.
Special notice
Disposing of this appliance in the forest or other natural surroundings endangers your health and is
bad for the environment. Hazardous substances may leak into the ground water and enter the food
chain.
Correct Disposal of This Product
(Waste Electrical & Electronic Equipment)
This marking shown on the product or its literature, indicates that waste electrical and
eletrical equipment should not be mixed with general household waste.
WARNING for Using R32/R290 Refrigerant
2
2
2
2
2
When flammable refrigerant are employed, appliance shall be stored in a well -ventilated area
where the room size corresponds to the room area as specifiec for operation.
For R32 frigerant models:
Appliance shall be installed, operated and stored in a room with a floor area larger than 4m .
For R290 refrigerant models, appliance shall be installed, operated and stored in a room with
a floor area larger than:
<=9000Btu/h units: 13m
>9000Btu/h and <=12000Btu/h units: 17m
>12000Btu/h and <=18000Btu/h units: 26m
>18000Btu/h and <=24000Btu/h units: 35m
Reusable mechanical connectors and flared joints are not allowed indoors.
(EN Standard Requirements).
Mechanical connectors used indoors shall have a rate of not more than 3g/year at 25%
of the maximum allowable pressure. When mechanical connectors are reused indoors,
sealing parts shall be renewed. When flared joints are reused indoors, the flare part
shall be re-fabricated. (UL Standard Requirements)
When mechanical connectors are reused indoors, sealing parts shall be renewed. When
flared joints are reused indoors, the flare part shall be re-fabricated.
(IEC Standard Requirements)
Mechanical connectors used indoors shall comply with ISO 14903.

Page 8 
Illustrations in this manual are for explanatory purposes. The actual shape of your indoor unit
may be slightly different. The actual shape shall prevail.
NOTE: Different models have different front panel and display window. Not all the indicators
describing below are available for the air conditioner you purchased. Please check the indoor display
window of the unit you purchased.
Power Cable
(Some Units)
Remote Control
Remote Control
Holder (Some Units)
Louver
Front Panel
Air Filter
(pull up)
Display window
(A) (B) (C)
ECO intelligent eye
(some units)
Display Code
Meanings
Unit Specifications and Features
Indoor unit display
Unit
Specifications
and Features
“ ” for 3 seconds when:
• TIMER OFF is set
“ ” when defrosting(for cooling & heating units)
“ ” when Active Clean feature is turned on(For Inverter split type )
when the Self clean feature is turned on (For fixed-speed type)
“ ” when ECO feature is activated(some units)
“ ” when wireless control feature is activated(some units)
“ ” “ ”Displays temperature, operation feature and Error codes:
“ ” when 8°C(46°F) heating mode is turned on(some units)
Humidity
Boos t
“ ” for 3 seconds when:
• TIMER ON is set (if the unit is OFF, remains on when TIMER ON is set )
• FRESH , UV-C lamp, SWING, TURBO , ECO, BREEZE AWAY,
ECO INTELLIGENT EYE or SILENCE feature is turned on
• FRESH , UV-C lamp, SWING, TURBO , ECO, BREEZE AWAY,
ECO INTELLIGENT EYE or SILENCE feature is turned off
“ ”

Unit
Specifications
and Features
Page 9 
Operating temperature
When your air conditioner is used outside of the following temperature ranges, certain safety
protection features may activate and cause the unit to disable.
COOL mode HEAT mode DRY mode
Room Temperature 17°C - 32°C
(62°F - 90°F)
0°C - 30°C
(32°F - 86°F)
10°C - 32°C
(50°F - 90°F)
Outdoor
Temperature
Outdoor Temperature
-30°C - 24 °C
(-22°F - 75.2°F)
-30°C - 50 °C
(-22°F - 122°F)
-25°C - 24°C
(-13°F - 75.2°F)
-25°C - 50°C
(-13°F - 122°F)
0°C - 50°C
(32°F - 122°F)
(For models with
low temp. cooling
systems.)
To further optimize the performance of your unit, do the following:
• Keep doors and windows closed.
• Limit energy usage by using TIMER ON and TIMER OFF functions.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.
FOR OUTDOOR UNITS
WITH BASEPAN HEATER
OR CRANKCASE HEATER
Inverter Split Type
When outside temperature
is below 0°C(32°F ), we
strongly recommend
keeping the unit plugged
in at all time to ensure
smooth ongoing
performance.
NOTE: Room relative humidity less than 80%. If the air conditioner operates in excess of this
figure, the surface of the air conditioner may attract condensation. Please sets the vertical air
flow louver to its maximum angle (vertically to the floor), and set HIGH fan mode.
(Energy Star / CZP Series)
(Hyper Heat / CHF Series)

Page 10 
Unit
Specifications
and Features
Other Features
• Auto-Restart(some units)
If the unit loses power, it will automatically
restart with the prior settings once power has
been restored.
• Anti-mildew (some units)
When turning off the unit from COOL, AUTO
(COOL), or DRY modes, the air conditioner will
continue operate at very low power to dry up
condensed water and prevent mildew growth.
• Wireless Control(some units)
Wireless control allows you to control your air
conditioner using your mobile phone and a
wireless connection.
• Louver Angle Memory(some units)
When turning on your unit, the louver will
automatically resume its former angle.
• Refrigerant Leakage Detection(some units)
• ECO Intelligent eye(some units)
The SLEEP function is used to decrease
energy use while you sleep (and don’t
need the same temperature settings to
stay comfortable). This function can only
be activated via remote control. And the
Sleep function is not available in FAN or
DRY mode.
When in COOL mode, the unit will increase
the temperature by 1°C (2°F) after 1 hour,
and will increase an additional 1°C (2°F) after
another hour.
When in HEAT mode, the unit will decrease
the temperature by 1°C (2°F) after 1 hour,
and will decrease an additional 1°C (2°F)
after another hour.
Sleep Operation
•
For the USB device access, replacement,
maintenance operations must be carried
out by professional staff.
Set
temperature
1hr 1hr
Keep
running
SLEEP Operation
Saving energy during sleep
Heat mode( -1 C/2 F) per hour
for the first two hours
Cool mode(+1 C/2 F) per hour
for the first two hours
A guide on using the infrared remote is not
included in this literature package. Not all
the functions are available for the air
conditioner, please check the indoor display
and remote control of the unit you purchased.
The sleep feature will stop after 8 hours and
the system will keep running with final situation.
For multi-split air condtioners, the following
functions are not available:
Active clean function, Silence feature, Breeze
away function, Refrigerant leakage detection
function and Eco feature.
NOTE:
• Active Clean function(some units)
-- The Active Clean Technology washes away
dust, mold, and grease that may cause odors
when it adheres to the heat exchanger by
automatically freezing and then rapidly thawing
the frost. A “pi-pi” sound will be heard.
The Active clean operation is used to produce
more condensed water to improve the cleaning
effect, and the cold air will blow out. After
cleaning, the internal wind wheel then keeps
operating with hot air to blow-dry the evaporator,
thus preventing the growth of mold and keeping
the inside clean.
-- When this function is turned on, the indoor
unit display window appears “CL ” , after 20
to 45 minutes, the unit will turn off automatically
and cancel Active Clean function.
• Breeze Away (some units)
This feature avoids direct air flow blowing on
the body and make you feel indulging in
silky coolness.
The indoor unit will automatically display “EL0C”
when it detects refrigerant leakage.
The system is controlled intelligently under
Intelligent eye mode. It can detect the people’s
activities in the room. In cooling mode, when you
are away for 30 minutes, the unit will automatically
lower the frequency to save energy(for Inverter
models only). And the unit will automatically start
and resume operation if sensing human activity
again.