hotspot energy DC4812VRF 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 batteries 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 information needed to correct power
problems by contacting your solar or HVAC installer or by
reviewing information provided by the manufacturers of the
batteries, charge controller, or solar panels, etc., or by
contacting HotSpot Technical Support at [phone].
Copyright 2013 HotSpot Energy
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Rev. 2.1

WARNING!
This unit uses high voltage DC power. Capacitors
within the unit may contain dangerous power even
after the power supply has been disconnected.
Refer any service to a qualified professional. See
page 15 for service information.
Capacitors MUST BE DISCHARGED before servicing
any electrical components of this unit!
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48v DC AIR CONDITIONER
MODEL DC4812VRF

Contents
NOTICE FOR EUROPEAN CUSTOMERS
SAFETY PRECAUTIONS
IDENTIFICATION OF PARTS
OPERATING INSTRUCTIONS
CARE AND MAINTENANCE
TROUBLESHOOTING TIPS
European Notice………………………………………………………………………………………………………………..….4
Warning .......................................................................................................................................5
Caution ........................................................................................................................................ 6
Identification of Parts...................................................................................................................7
Operating Instructions..................................................................................................................8
Care & Maintenance ..................................................................................................................10
Troubleshooting Guide ..............................................................................................................12
Service and Repair……………………………………………………………………………………………………………….15
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48v DC AIR CONDITIONER
MODEL DC4812VRF

Notice for Users in European Countries
When using this air conditioner in the European countries, please read the following
information:
This appliance can be used by children aged from 8 years and above and persons with
reduced 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 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. Collection
of such waste separately for special treatment is necessary. It is prohibited to
dispose of this appliance in domestic household waste. For disposal, there are
several possibilities:
A) The municipality has established collection 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 instructions
must be followed. Incorrect operation due to ignoring of instructions may cause harm or damage.
SAFETY PRECAUTIONS
This unit uses capacitors and may have high voltage active even after 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, sticks, or other objects in the air inlet and outlet vents.
Never attempt to repair, relocate, or modify the air conditioner yourself. Always contact qualified
service personnel.
Do not operate your air conditioner in a wet room such as a bathroom or laundry room.
In the event of any abnormalities 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 installation 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 capabilities, or lack of experience, 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 air conditioner.
DANGER
This unit uses high voltage DC power. Capacitors
within the unit may contain dangerous power even after
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 conditioner with water. Never use combustible cleaning agents as these could
cause a fire or deformation.
Never place any burning objects close to the device if they could be directly affected by the emitted
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 conditioner in places where combustible gas can be emitted. Gas may collect
and cause an explosion.
Never allow the air conditioner 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 after
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. Vertical air flow louver (inside)
7. Display panel
8. Connecting pipe, drain hose
DC4812VRF Outdoor Unit
9. Connective cable
10. Connecting pipe
11. Stop valve
Digital Display

OPERATING INSTRUCTIONS
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NOTE: This manual does not include Remote Controller Operations, see the remote control user guide
for details.
Operating Temperature
Cooling
Heating
Dehumidification
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. Optimum performance will be achieved within these
operating temperatures. If air conditioner is used
outside of the above conditions, certain safety
protection features might activate.
2. If the air conditioner runs for a long time in cooling
mode and the humidity is high (over 80%), condensed
water may drip out of the unit. Please set the vertical air
flow louver to its maximum angle (vertically to the floor),
and set HIGH fan mode.
Manual Operation
Units are equipped with a switch to run emergency operation
mode. It can be accessed by opening the front panel. This
switch is used for manual operation in case the remote
controller is lost or inoperative.
NOTE
The unit must be turned off before operating the manual
control button. If the unit is operational, continue
pressing the manual control button until the unit is off.
This is NOT the recommended way to operate the unit.
To restore the remote controller operation, use the
remote controller directly.
Adjust the horizontal louver
using the remote controller.
Adjust the vertical louver
manually. To set the vertical
airflow (Up--Down) direction
perform this function while the
unit is in operation.
Use the remote controller to
adjust the air flow direction. The
horizontal louver can be moved
at a range of 6⁰ for each press,
or swing up and down
automatically.
Please refer to the DC4812VRF
REMOTE CONTROL USER GUIDE
Air Flow Direction control
Caution
Do not operate the air conditioner for long periods with
the air flow direction set downward in cooling or
dehumidifying mode. Otherwise, condensation 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 conditioner is started immediately after 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 position. When the air conditioner is connected to
power (initial power), the horizontal louver may generate a
sound for 10 seconds, this is a normal operation.

OPERATING INSTRUCTIONS
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Auto Operation
When you set the air conditioner in AUTO mode, it will
automatically select cooling, heating, or fan only operation depending on
what temperature you have selected and the room temperature. The air
conditioner will control room temperature automatically according to the
temperature point set by you. If the AUTO mode is uncomfortable, you can
select desired conditions manually.
SLEEP Operation
When you push SLEEP button on remote controller during cooling, heating, or
AUTO operation, the air conditioner will automatically increase (cooling) or
decrease (heating) 2⁰F per hour for the first 2 hours, then hold steady for the
next 5 hours, after that it will switch off. This characteristic maintains both
energy saving and comfortable night operation.
Dehumidification (Drying) Operation
The fan speed will be automatically controlled under this operation. During
dehumidification operation, if the room temperature is lower than 10C (50F),
the compressor stops operation and restarts until the room temperature is
above 12C (54F).
Optimal Operation
To achieve optimal performance, please note the following:
Adjust the air flow direction 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 button on the remote controller to select a time you want
to start your air conditioner.
Do not put any object near air inlet or outlet, as the efficiency of the
air conditioner may be reduced and the air conditioner may stop running.
Keep away from electrical wires, lighting ballast, or wireless devices that may
interfere with controller or operations.
Clean the air filter periodically, otherwise cooling or heating performance
may be reduced.
Do not operate unit with horizontal louver in closed position.

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 plastic surface to crack or deform. Never use
water hotter than 40C/104F to clean the front panel, it
could cause deformation or discoloration. CAUTION
Power supply must be disconnected before cleaning the
indoor unit. To clean, wipe with a soft, 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. Lift the indoor unit panel up to an angle until 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 lift 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 optional Air Freshening Filter:
4. Remove the Air Freshening Filter from its
support frame (on some models). The
optional filter includes:
Plasma Dust Collector/Silver Ion
filter/Biofilter/Vitamin C filter/ 3M air purifier
filter, etc.
The removal and installation 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 after opening the front panel, it may cause an
electric shock.
5. Install the air freshening filter back into position.
6. Insert the upper portion of air filter back into the
unit, taking care that the left and right edges line up
correctly and place filter into position.
Replacement of air filter and air freshening filter
1. Remove the air filter.
2. Remove and clean the air freshening filter.
3. Optional -install a new air freshening filter.
4. Reinstall the air filter and securely close the front
panel.
Preparation for end-of-season or extended shut-down:
If you plan to not use the unit for a long time, 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 conditioner and disconnect power.
Remove the batteries from the remote controller.
4. The 48v batteries and solar etc., should be
disconnected and stored per manufacturers
instructions. Do not attempt to do this yourself. Contact
your service provider.

TROUBLESHOOTING TIPS
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Normal function of the air conditioner
The following events may occur during normal operation.
•Protection of the air conditioner prevents the compressor from starting again until
3-4 minutes after it stops.
•The unit is designed to not blow cold air during heating mode, when the indoor heat exchanger is
in one of the following three situations and the set temperature has not been reached:
A) When heating has just started.
B) Defrosting.
C) Low temperature heating.
• The indoor or outdoor fan stops running when defrosting.
•Frost may be generated on the outdoor unit during heat cycle when outdoor temperature is low and
humidity is high resulting in lower heating efficiency of the air conditioner. During this condition the
air conditioner will stop heating operation and start defrosting automatically. The time 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 relative humidity. A white mist may
generate due to moisture generated from defrosting process when the air conditioner restarts in
HEAT mode operation after defrosting.
•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 contraction of the plastic parts in the unit when the temperature is changing. A noise may be
heard due to louver restoring to its original position when power is turned on.
•Dust blows from the indoor unit. This is a normal condition when the air conditioner has not been
used for a long time 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 conditioner turns to FAN only mode from COOL or HEAT mode. When indoor temperature
reaches the temperature setting on air conditioner, the compressor may stop automatically, and the
air conditioner 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 conditioner runs anti-mildew function after turning off the unit. When turning off the unit
under COOL (AUTOCOOL, FORCED COOL) and DRY mode, the air conditioner will run in this function
for 7-10 minutes, then stop the operation and turn off the unit automatically. Anti-mildew turns off
on HEAT mode, the unit will continue operating for about 30 seconds at LOW fan speed then stop
the operation and turn off the unit automatically.
•Dripping water may form on the surface of the indoor unit when cooling in high relative
humidity. Adjust the horizontal louver to the maximum air outlet position and select HIGH fan speed.
•Heating mode. The air conditioner draws in heat from the outdoor unit and releases it via the indoor unit
during heating operation. When the outdoor temperature falls, heat drawn in by the air conditioner
decreases accordingly. At the same time, heat loading of the air conditioner increases due to larger
difference between indoor and outdoor temperature. If a comfortable temperature can't be achieved
by the air conditioner, we suggest you use a supplementary heating device.
•Auto-restart function. Any power failure or drop in DC voltage below 46v will stop the unit completely
until power is restored or batteries charge above 48v. When power restores, the unit restarts automatically
with all the previous settings preserved by the memory function.
•Power is on but unit wont run. Power surge, nearby lighting 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 malfunction. Disconnect the unit
completely from power for 30 seconds and then re-connect the unit with power again. Push the ON/OFF
button on the remote controller to restart operation. Do not allow direct sunlight to shine on the remote
control IR receiver of the indoor unit.
•The protection of outdoor low temperature. The protection of outdoor low temperature can be
activated only in the HEATING mode. The unit will stop operating 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 situation can still receive the signal from the remote controller. The unit will restart
automatically with all the previous settings preserved by the memory function when the outdoor
temperature is or higher than 11F (-12C) for 10 minutes and the compressor stops operating 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 HotSpot SERVICE
MANUAL which contains complete service and diagnostic information not
available to consumers. If your service technician needs advanced support or
documents please have them contact HotSpot at [phone]

Copyright 2013 HotSpot Energy
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Attention Professional Service Personnel:
This unit has capacitors located in multiple places within the system.
You must identify and discharge all capacitors before servicing
this unit!
Please see the HotSpot Energy DC4812VRF SERVICE MANUAL before
performing any service. Licensed HVAC technicians may obtain the service
manual at no cost from HSE support department.
Contact HotSpot at [e-mail] or [phone]
WARNING
High Voltage DC Power
MAY BE ACTIVE
AFTER FULL DISCONNECTION
Users Do Not Ever Attempt to Service This Unit. Contact a Professional.