Full Text Searchable PDF User Manual
SPLIT TYPE -‐ 48v DC AIR CONDITIONER
MODEL DC4812VRF
Users Guide
IMPORTANT NOTICE
This is a DC (Direct Current) powered device and relies upon a 48v DC
power source. The DC power to the baKeries may be provided by solar
or other means. This user guide does not address power issues and
assumes you have a proper supply of power. Please consult with the
appropriate resource for power problems.
You may find the informaQon needed to correct power problems by
contacQng your solar or HVAC installer or by reviewing informaQon
provided by the manufacturers of the baKeries, charge controller, or
solar panels, etc., or by contacQng your local distributor.
Visit LezeQ-‐tech.com for more informaQon.
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WARNING!
This unit uses high voltage DC power. Capacitors
within the unit may contain dangerous power even
aXer the power supply has been disconnected.
Refer any service to a qualified professional. See
page 15 for service informaQon.
Capacitors MUST BE DISCHARGED before servicing
any electrical components of this unit!
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MODEL DC4812VRF
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Contents
NOTICE FOR EUROPEAN CUSTOMERS
SAFETY PRECAUTIONS
IDENTIFICATION OF PARTS
OPERATING INSTRUCTIONS
CARE AND MAINTENANCE
TROUBLESHOOTING TIPS
European NoQce………………………………………………………………………………………………………………..….4
Warning .......................................................................................................................................5
CauQon ........................................................................................................................................ 6
IdenQficaQon of Parts...................................................................................................................7
OperaQng InstrucQons..................................................................................................................8
Care & Maintenance ..................................................................................................................10
TroubleshooQng Guide ..............................................................................................................12
Service and Repair……………………………………………………………………………………………………………….15
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48v DC AIR CONDITIONER
MODEL DC4812VRF
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NoQce for Users in European Countries
When using this air condi3oner in the European countries, please read the following
informa3on:
This appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabiliQes, or lack of experience and knowledge if
they have been given supervision or instrucQon concerning use of the appliance in a
safe way and understand the hazards involved. Children should not play with the
appliance. Cleaning and user maintenance must not be performed by children without
supervision.
DISPOSAL:
Do not dispose of this product as unsorted municipal waste. CollecQon
of such waste separately for special treatment is necessary. It is prohibited to
dispose of this appliance in domesQc household waste. For disposal, there are
several possibiliQes:
A) The municipality has established collecQon systems, where electronic waste can
be disposed of at least free of charge to the user.
B) When buying a new product, the retailer will take back the old product at least
free of charge.
C) The manufacturer will take back the old appliance for disposal at least free of
charge to the user.
D) As old products contain valuable resources, they can be sold to scrap metal
dealers.
Wild disposal of waste in forests and landscapes endangers your health when
hazardous substances leak into the ground-‐water and find their way into the food
chain.
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To prevent injury to the user or other people and property damage, the following instrucQons
must be followed. Incorrect operaQon due to ignoring of instrucQons may cause harm or damage.
SAFETY PRECAUTIONS
This unit uses capacitors and may have high voltage acQve even aXer power has been
disconnected. Make sure to discharge capacitors before servicing any electrical components of the
unit.
Don’t expose your body directly to the cool air for prolonged period.
Never poke fingers, sQcks, or other objects in the air inlet and outlet vents.
Never aKempt to repair, relocate, or modify the air condiQoner yourself. Always contact qualified
service personnel.
Do not operate your air condiQoner in a wet room such as a bathroom or laundry room.
In the event of any abnormaliQes such as a burning smell, immediately switch off the device and
disconnect power from the outdoor unit. Contact your service partner.
Always switch off the device and disconnect power before you start to clean it.
Contact an authorized installer for installaQon of this unit. Contact an authorized service
technician for repair or maintenance of this unit.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabiliQes, or lack of experience, unless they have been given supervision or
instrucQon 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 air condiQoner.
DANGER
This unit uses high voltage DC power. Capacitors
within the unit may contain dangerous power even aXer
the power supply has been disconnected. Refer any
service to a qualified professional. Capacitors MUST BE
DISCHARGED before servicing any electrical
components of this unit!
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Never actuate any switches with a wet hand. It may cause an electric shock.
Never use the device for any other purpose than the intended use. Never place food, precision
instruments, plants, animals, paint, etc. on the unit.
Do not expose plants or animals directly to the air flow.
Never clean the air condiQoner with water. Never use combusQble cleaning agents as these could
cause a fire or deformaQon.
Never place any burning objects close to the device if they could be directly affected by the emiKed
air.
Never step on to the outdoor device and never place anything on it.
Never use an unsteady or rusty base.
Never install the air condiQoner in places where combusQble gas can be emiKed. Gas may collect
and cause an explosion.
Never allow the air condiQoner to run for too long with the doors or windows open, or if the
humidity is very high.
DANGER
This unit uses high voltage DC power. Capacitors
within the unit may contain dangerous power even aXer
the power supply has been disconnected. Refer any
service to a qualified professional. Capacitors MUST BE
DISCHARGED before servicing any electrical
components of this unit!
SAFETY PRECAUTIONS
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IDENTIFICATION OF PARTS
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DC4812VRF Indoor Unit
1. Front panel
2. Air inlet
3. Air filter (under the panel)
4. Air outlet
5. Horizontal air flow grille
6. VerQcal air flow louver (inside)
7. Display panel
8. ConnecQng pipe, drain hose
DC4812VRF Outdoor Unit
9. ConnecQve cable
10. ConnecQng pipe
11. Stop valve
Digital Display
OPERATING INSTRUCTIONS
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NOTE: This manual does not include Remote Controller OperaQons, see the remote control user guide
for details.
OperaQng Temperature
Cooling
HeaQng
DehumidificaQon
Indoor (F/C)
62-‐90/12-‐32
32-‐86/0-‐30
50-‐90/10-‐32
Outdoor (F/C)
32-‐122/0-‐50
5-‐86/-‐15-‐30
32-‐122/0-‐50
1. OpQmum performance will be achieved within these
operaQng temperatures. If air condiQoner is used
outside of the above condiQons, certain safety
protecQon features might acQvate.
2. If the air condiQoner runs for a long Qme in cooling
mode and the humidity is high (over 80%), condensed
water may drip out of the unit. Please set the verQcal air
flow louver to its maximum angle (verQcally to the floor),
and set HIGH fan mode.
Manual Opera3on
Units are equipped with a switch to run emergency operaQon
mode. It can be accessed by opening the front panel. This
switch is used for manual operaQon in case the remote
controller is lost or inoperaQve.
NOTE
The unit must be turned off before operaQng the manual
control buKon. If the unit is operaQonal, conQnue
pressing the manual control buKon unQl the unit is off.
This is NOT the recommended way to operate the unit.
To restore the remote controller operaQon, use the
remote controller directly.
Adjust the horizontal louver
using the remote controller.
Adjust the verQcal louver
manually. To set the verQcal
airflow (Up-‐-‐Down) direcQon
perform this funcQon while the
unit is in operaQon.
Use the remote controller to
adjust the air flow direcQon. The
horizontal louver can be moved
at a range of 6⁰ for each press,
or swing up and down
automaQcally.
Please refer to the DC4812VRF
REMOTE CONTROL USER GUIDE
Air Flow DirecQon control
Cau3on
Do not operate the air condiQoner for long periods with
the air flow direcQon set downward in cooling or
dehumidifying mode. Otherwise, condensaQon may
occur on the surface of the horizontal louver causing
moisture to drop on the floor or on furnishings. Do not
move the horizontal louver manually unless it is necessary,
always use the remote controller.
When the air condiQoner is started immediately aXer it
was stopped, the horizontal louver might not move for
approximately 10 seconds. Open angle of the horizontal
louver should not be set too small, as COOLING or
HEATING performance may be impaired due to restricted
air flow. Do not operate unit with horizontal louver in
closed posiQon. When the air condiQoner is connected to
power (iniQal power), the horizontal louver may generate a
sound for 10 seconds, this is a normal operaQon.
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OPERATING INSTRUCTIONS
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Auto OperaQon
When you set the air condiQoner in AUTO mode, it will
automaQcally select cooling, heaQng, or fan only operaQon depending on
what temperature you have selected and the room temperature. The air
condiQoner will control room temperature automaQcally according to the
temperature point set by you. If the AUTO mode is uncomfortable, you can
select desired condiQons manually.
SLEEP OperaQon
When you push SLEEP buKon on remote controller during cooling, heaQng, or
AUTO operaQon, the air condiQoner will automaQcally increase (cooling) or
decrease (heaQng) 2⁰F per hour for the first 2 hours, then hold steady for the
next 5 hours, aXer that it will switch off. This characterisQc maintains both
energy saving and comfortable night operaQon.
DehumidificaQon (Drying) OperaQon
The fan speed will be automaQcally controlled under this operaQon. During
dehumidificaQon operaQon, if the room temperature is lower than 10C (50F),
the compressor stops operaQon and restarts unQl the room temperature is
above 12C (54F).
OpQmal OperaQon
To achieve opQmal performance, please note the following:
Adjust the air flow direcQon correctly so that it is not directed on people.
Adjust the temperature to achieve the highest comfort level. Do not
adjust the unit to excessive temperature levels.
Close doors and windows on COOL or HEAT modes, or performance
may be reduced.
Use TIMER ON buKon on the remote controller to select a Qme you want
to start your air condiQoner.
Do not put any object near air inlet or outlet, as the efficiency of the
air condiQoner may be reduced and the air condiQoner may stop running.
Keep away from electrical wires, lighQng ballast, or wireless devices that may
interfere with controller or operaQons.
Clean the air filter periodically, otherwise cooling or heaQng performance
may be reduced.
Do not operate unit with horizontal louver in closed posiQon.
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CARE AND MAINTENANCE
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A cloth dampened with cold water may be used on the
indoor unit if it is very dirty, then wipe it with a dry
cloth. Do not use a chemically treated cloth or duster to
clean the unit. Do not use benzene, thinner, polishing
powder, or similar solvents for cleaning. These may
cause the plasQc surface to crack or deform. Never use
water hoKer than 40C/104F to clean the front panel, it
could cause deformaQon or discoloraQon. CAUTION
Power supply must be disconnected before cleaning the
indoor unit. To clean, wipe with a soX, dry cloth. Do not
use bleach or abrasives.
A clogged or dirty air filter reduces the efficiency of this
unit. Please clean the filter once every 2 weeks.
1. LiX the indoor unit panel up to an angle unQl it stops
with a clicking sound. For some models, please use
suspension bars to prop up the panel.
2. Take hold of the handle of the air filter and liX it up
slightly to take it out from the filter holder, then pull it
downwards.
3. Remove the AIR FILTER from the indoor unit. Clean
the AIRFILTER once every two weeks. Clean the
AIRFILTER with a vacuum cleaner or water, then dry it in
a cool place.
Cleaning the opQonal Air Freshening Filter:
4. Remove the Air Freshening Filter from its
support frame (on some models). The opQonal
filter includes:
Plasma Dust Collector/Silver Ion filter/
Biofilter/Vitamin C filter/ 3M air purifier filter,
etc.
The removal and installaQon methods are
slightly different, see the pictures. Clean it
with vacuum cleaner and damp cloth, then dry
it in cool place.
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CARE AND MAINTENANCE
Do not touch the Plasma Dust Collector Filter within 10
minutes aXer opening the front panel, it may cause an
electric shock.
5. Install the air freshening filter back into posiQon.
6. Insert the upper porQon of air filter back into the
unit, taking care that the leX and right edges line up
correctly and place filter into posiQon.
Replacement of air filter and air freshening filter
1.
Remove the air filter.
2.
Remove and clean the air freshening filter.
3.
OpQonal -‐install a new air freshening filter.
4.
Reinstall the air filter and securely close the front
panel.
PreparaQon for end-‐of-‐season or extended shut-‐down:
If you plan to not use the unit for a long Qme, perform
the following:
1. Clean the indoor unit and filters.
2. Operate the fan for about half a day to dry the inside
of the unit.
3. Stop the air condiQoner and disconnect power.
Remove the baKeries from the remote controller.
4. The 48v baKeries and solar etc., should be
disconnected and stored per manufacturers
instrucQons. Do not aKempt to do this yourself. Contact
your service provider.
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TROUBLESHOOTING TIPS
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Normal funcQon of the air condiQoner
The following events may occur during normal operaQon.
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ProtecQon of the air condiQoner prevents the compressor from starQng again unQl
3-‐4 minutes aXer it stops.
•
The unit is designed to not blow cold air during heaQng mode, when the indoor heat exchanger is
in one of the following three situaQons and the set temperature has not been reached:
A) When heaQng has just started.
B) DefrosQng.
C) Low temperature heaQng.
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The indoor or outdoor fan stops running when defrosQng.
•
Frost may be generated on the outdoor unit during heat cycle when outdoor temperature is low and
humidity is high resulQng in lower heaQng efficiency of the air condiQoner. During this condiQon the
air condiQoner will stop heaQng operaQon and start defrosQng automaQcally. The Qme to defrost
may vary from 4 to 10 minutes according to the outdoor temperature and the amount of frost built
upon the outdoor unit.
•
A white mist may generate due to a large temperature difference between air inlet and air outlet
on COOL mode in an indoor environment that has a high relaQve humidity. A white mist may
generate due to moisture generated from defrosQng process when the air condiQoner restarts in
HEAT mode operaQon aXer defrosQng.
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Noise. You may hear a low hissing sound when the compressor is running or has just stopped
running. It is the sound of the refrigerant flowing or coming to a stop. You can also hear a low "squeak“
sound when the compressor is running or has just stopped running. This is caused by heat expansion
and cold contracQon of the plasQc parts in the unit when the temperature is changing. A noise may be
heard due to louver restoring to its original posiQon when power is turned on.
•
Dust blows from the indoor unit. This is a normal condiQon when the air condiQoner has not been
used for a long Qme or during first use of the unit.
•
A peculiar smell comes from the indoor unit. This may be caused by the indoor unit giving off smells
permeated from building material, from furniture, or smoke.
•
The air condiQoner turns to FAN only mode from COOL or HEAT mode. When indoor temperature
reaches the temperature sesng on air condiQoner, the compressor may stop automaQcally, and the
air condiQoner turns to FAN only mode. The compressor will start again when the indoor temperature
rises on COOL mode or falls on HEAT mode to the set point
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TROUBLESHOOTING TIPS
•
The air condiQoner runs anQ-‐mildew funcQon aXer turning off the unit. When turning off the unit
under COOL (AUTOCOOL, FORCED COOL) and DRY mode, the air condiQoner will run in this funcQon
for 7-‐10 minutes, then stop the operaQon and turn off the unit automaQcally. AnQ-‐mildew turns off
on HEAT mode, the unit will conQnue operaQng for about 30 seconds at LOW fan speed then stop
the operaQon and turn off the unit automaQcally.
•
Dripping water may form on the surface of the indoor unit when cooling in high relaQve
humidity. Adjust the horizontal louver to the maximum air outlet posiQon and select HIGH fan speed.
•
HeaQng mode. The air condiQoner draws in heat from the outdoor unit and releases it via the indoor unit
during heaQng operaQon. When the outdoor temperature falls, heat drawn in by the air condiQoner
decreases accordingly. At the same Qme, heat loading of the air condiQoner increases due to larger
difference between indoor and outdoor temperature. If a comfortable temperature can't be achieved
by the air condiQoner, we suggest you use a supplementary heaQng device.
•
Auto-‐restart funcQon. Any power failure or drop in DC voltage below 46v will stop the unit completely
unQl power is restored or baKeries charge above 48v. When power restores, the unit restarts automaQcally
with all the previous sesngs preserved by the memory funcQon.
•
Power is on but unit wont run. Power surge, nearby lighQng ballast, unshielded electrical wiring, wireless
interference, use of other IR remote controllers (like used for TV etc.) or other electronic interference
nearby may cause the unit and/or the remote control IR receiver to malfuncQon. Disconnect the unit
completely from power for 30 seconds and then re-‐connect the unit with power again. Push the ON/OFF
buKon on the remote controller to restart operaQon. Do not allow direct sunlight to shine on the remote
control IR receiver of the indoor unit.
•
The protecQon of outdoor low temperature. The protecQon of outdoor low temperature can be
acQvated only in the HEATING mode. The unit will stop operaQng and display "P3“ on the LCD window
of the indoor unit when the outdoor temperature is lower than 5F(-‐15C) for one hour, but the indoor
unit in this situaQon can sQll receive the signal from the remote controller. The unit will restart
automaQcally with all the previous sesngs preserved by the memory funcQon when the outdoor
temperature is or higher than 11F (-‐12C) for 10 minutes and the compressor stops operaQng for
more than one hour, or when the outdoor temperature is or higher than 41F (5C) for 10 minutes.
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TROUBLESHOOTING TIPS
Your dealer or service technician will have access to the LEZETi SERVICE
MANUAL which contains complete service and diagnosQc informaQon not
available to consumers. If your service technician needs advanced support or
documents please have them contact you distributor or visit
www.lezeQ-‐tech.com
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ANen3on Professional Service Personnel:
This unit has
capacitors located in mul3ple places within the system.
You must idenQfy and discharge all capacitors before servicing
this unit!
Please see the LEZETi DC4812VRF SERVICE MANUAL before
performing any service. Licensed HVAC technicians may obtain the service
manual at no cost from HSE support department.
WARNING
High Voltage DC Power
MAY BE ACTIVE
AFTER FULL DISCONNECTION
Users Do Not Ever ANempt to Service This Unit. Contact a Professional.
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