ACPro AULD36W2/A-D User manual

Owner's Manual
Original Instructions
Air Conditioners
DC Inverter X-Series for R410A Unitary Split
Air Conditioner
Models:
Outdoor Unit
$ULD36W2/A-D(U)
$ULD60W2/A-D(U)
Thank you for choosing AC Pro air conditioners. Please read this
Owner's Manual carefully before operation and retain it for future
reference.

To Users
Thank you for selecting AC PRO’s product. Please read this instruction
manual carefully before installing and using the product.
(1) 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 ifthey have been given supervision or instruction
concerning use of the appliance in asafe 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.
(2) In order to ensure reliability of product, the product may consume some power
under stand-by status for maintaining normal communication of system and
preheating refrigerant and lubricant. Ifthe product isnot to be used for long, cut
off the power supply; please energize and preheat the unit in advance before
reusing it.
(3) Please properly select the model according to actual using environment;
otherwise it may impact the using convenience.
(4) This product hasgone through strict inspection and operational test before
leaving the factory.In order to avoid damage due to improper disassembly and
inspection, which may impact the normal operation of unit, please do not
disassemble the unit by yourself. You can contact AC Pro Technical Support if
necessary.
(5) When the product is faulted and cannot be operated, please contact our AC
Pro Technical Support as soon as possible by providing the following
information.
1) Contents of nameplate of product (model, cooling/heating capacity,product
No, ex-factory date).
2) Malfunction status (specify the situations before and after the error occurs).
(6) All the illustrations and information in the instruction manual areonly for
reference. Inorder tomake the product better, we will continuously conduct
improvement and innovation. We have the right to make necessary revision to
the product from time to time due to the reason of sales or production, and
reserve the right to revise the contents without further notice.

(7) If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
(8) AC PRO assumes no responsibility for personal
injury, property loss or equipment damage caused by improper installation and
commissioning, unnecessary maintenance, or not following relevant national
rules and regulations, industrial standards and requirements in this instruction
manual.
(9) The final right to interpret for this instruction manual belongs to AC PRO.
Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss is
caused by the following reasons:
(1) Damage the product due to improper use or misuse of the product.
(2) Alter, change, maintain or use the product with other equipment without abiding
by the instruction manual of manufacturer.
(3) After verification, the defect of product is directly caused by corrosive gas.
(4) After verification, defects are due to improper operation during transportation of
product.
(5) Operate, repair, maintain the unit without abiding by instruction manual or
related regulations.
(6) After verification, the problem or dispute is caused by the quality specification or
performance of parts and components that produced by other manufacturers.
(7) The damage is caused by natural calamities, bad using environment or force
majeure.

Contents
1 Safety Precautions ............................................................ 1
2 Product Introduction ......................................................... 5
2.1 Operating Range....................................................................5
2.2 Standard Accessories.............................................................5
2.3 Optional Accessories..............................................................5
3 Installation.......................................................................... 5
3.1 Installation Preparation ..........................................................5
3.2 Unit Installation ....................................................................11
3.3 Electrical Installation ............................................................17
3.4 Check after Installation.........................................................22
3.5 Test Running ........................................................................23
4 Maintenance..................................................................... 27
4.1 Failures Not Caused by Faults ofThe AC ............................27
4.2 Error Code ...........................................................................29
4.3 Unit Maintenance .................................................................30
4.4 Notice on Maintenance ........................................................31
4.5 After-Sales Services.............................................................36
3.6Functions .............................................................................24

DC Inverter X-Series for R410A Unitary Split Air Conditioner
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1 Safety Precautions
This product can’t be installed at corrosive, inflammable or explosive environment
or the place with special requirements, such as kitchen. Otherwise, it will affect the
normal operation or shorten the service life of the unit, or even cause fire hazard or
serious injury. As for above special places, please adopt special air conditioner with
anti-corrosive or anti-explosion function.
Improper installation, adjustment, alteration, service, maintenance, or use can
cause explosion, fire, electrical shock, or other conditions which may cause death,
personal injury, or property damage. Consult a qualified installer, service agency, or
your distributor or branch for information or assistance. The qualified installer or agency
must use factory--authorized kits or accessories when modifying this product. Refer to
the individual instructions packaged with the kits or accessories when installing. Follow
all safety codes. Wear safety glasses, protective clothing, and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions included in literature and
attached to the unit. Consult local building codes and National Electrical Code (NEC)
for special requirements. Recognize safety information. This is the safety--alert
symbol .
When you see this symbol on the unit and in instructions or manuals, be alert to the
potential for personal injury. Understand these signal words: DANGER, WARNING,
CAUTION and NOTICE. These words are used with the safety--alert symbol.
Indicates a hazardous situation that, if not avoided, will result in
death or serious injury.
Indicates a hazardous situation that, if not avoided, could result
in death or serious injury.
Indicates a hazardous situation that, if not avoided, may result
in minor or moderate injury.
Indicates important but not hazard-related information, used to
indicate risk of property damage.

DC Inverter X-Series for R410A Unitary Split Air Conditioner
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Electrical shock hazard:
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, main electrical disconnect switch
must be in the OFF position. There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label.
(1) The air conditioner should be grounded to avoid electric shock. Do not connect
the ground wire to gas pipe, water pipe, lightning arrester or telephone wire.
(2) The appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specified for operation.
(3) The appliance shall be stored in a room without continuously operating open
flames (for example an operating gas appliance) and ignition sources (for
example an operating electric heater).
(4) Accor
ding to federal/state/local laws and regulations, all packages and
transportation materials, including nails, metal or wooden parts, and plastic
packing material, must be treated in a safe way.
(1)
Please install according to this instruction manual. Installation must be
performed in accordance with the requirement of NEC and CEC by authorized
personnel only.
(2) Any person who is involved with working on or breaking into a refrigerant circuit
should hold a current valid certificate from an industry-accredited assessment
authority, which authorises their competence to handle refrigerants safely in
accordance with an industry recognised assessment specification.
(3) Servicing shall only be performed as recommended by the equipment
manufacturer.
(4) The appliance shall be installed in accordance with national wiring regulations.
(5) The fixed wires connecting to the appliance must be configured with all-pole
disconnection device under voltage grade III according to wiring rules.
(6) Air conditioner should be stored with protective measures against mechanical
damage caused by accident.
(7) If the installation space for air conditioner pipe is too small, adopt a protective
measure to prevent the pipe from physical damage.

DC Inverter X-Series for R410A Unitary Split Air Conditioner
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(8) During installation, use the specialized accessories and components, otherwise
water leakage, electric shock or fire hazard may occur.
(9) Please install the air conditioner in a secure place that can withstand the weight
of air conditioner. Insecure installation may cause the air conditioner falling
down and lead to injury.
(10) Be sure to adopt independent power circuit. If the power cord is damaged, it
must be repaired by the manufacturer, service agent or other professional
agents.
(11) The
air conditioner can be cleaned only after it is turned off and
power-disconnected, otherwise electric shock may occur.
(12) The air conditioner is not intended to be cleaned or maintained by children
without supervision.
(13) Do not alter the setting of pressure sensor or other protective devices. If the
protective devices are short-circuited or changed against rules, fire hazard or
even explosion may occur.
(14) Do not operate the air conditioner with wet hands. Do not wash or sprinkle
water on the air conditioner, otherwise malfunction or electric shock will occur.
(15) Do not dry the filter with naked flame or an air blower; otherwise the filter will be
out of shape.
(16) If the unit is to be installed in a small space, please adopt protective measures
to prevent the concentration of refrigerant from exceeding the allowable safety
limit; excessive refrigerant leakage may lead to explosion.
(17) When installing or re-installing the air conditioner, please keep the refrigerant
circuit away from substances other than the specified refrigerant, such as air.
Any presence of foreign substances will cause abnormal pressure change or
even explosion, resulting in injury.
(1) Do not put a finger or other objects into the air inlet or return air grill.
(2) Please adopt safety protection measures before touching the refrigerant pipe;
otherwise your hands may be hurt.
(3) Please arrange the drain pipe according to the instruction manual.
(4) Never stop the air conditioner by directly cutting off the power.
(5) Please select the proper copper pipe according to the requirement for pipe
thickness.

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(6) Never install the air conditioner in the following places:
a) Places with oil smoke or volatile liquid: plastic parts may deteriorate and fall
off or even cause water leakage.
b)
Places with corrosive gas: copper pipe or the welding parts may be
corroded and cause refrigerant leakage.
(7) Adopt proper measures to protect the outdoor unit from small animals because
they may damage the electric components and cause malfunction of the air
conditioner.
(1) If thermostat is to be used, it should be connected first before powering up the
unit, otherwise the thermostat may not be able to use.
(2) Only use soft dry cloth or slightly wet cloth with neutral detergent to clean the
casing of the air conditioner.
(3) Before operating the unit under low temperature, connect it to power for 8
hours. If it is stopped for a short time, for example, one night, do not cut off the
power (This is to protect the compressor).

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2 Product Introduction
2.1 Operating Range
—Cooling
Outdoor temperature 39.2°F(4°C)~118.4°F (48°C)
2.2 Standard Accessories
Outdoor unit accessories
No.
Name
Appearance
Q'ty
Usage
1 Drain plug 3 To plug the unused drain
hole
2.3 Optional Accessories
Outdoor unit accessories
No.
Name
Appearance
Q'ty
Usage
1 Throw-over
pipe 1
Connect the unit
with the liquid
pipe
2 Throw-over
pipe 1
Connect the unit
with the gas
pipe
3 Installation
3.1 Installation Preparation
3.1.1 Selection of Installation Location
①
.The unit must be installed where strong enough to withstand the weight of the unit
and fixed securely, otherwise the unit would topple or fall off.
②.Install the air conditioner at a place where the inclination is less than 5°.
③
.Do not install the unit at a place with direct sunlight.
④.Do not install where there is the danger of combustible gas leakage.
⑤.Do not install the unit at a place with leakage of inflammable gas.

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Selection of installation location for outdoor unit (Select a location pursuant to the
following condition).
(1) Noise and air flow produced by the outdoor unit will not disturb the neighbors.
(2) Select a location that is safe and away from animals and plants. If not, please add
safety fences to protect the unit.
(3) Install at a place with good ventilation. Make sure the outdoor unit stays at a
well-ventilated place with no obstacles nearby that may obstruct the air inlet and
outlet.
(4) The installation location should be able to withstand the weight and vibration of
outdoor unit and allow the installation to be carried out safely.
(5) Avoid installing at a place with leakage of inflammable gas, oil smoke or corrosive
gas.
(6) Keep it away from strong wind because strong wind will affect the outdoor fan and
lead to insufficient air flow volume and thus affecting the unit’s performance.
(7) Away from any object that may get the air conditioner generating noise.
(8) Install the outdoor unit at a place where condensate can be easily drained.
3.1.2 Unit Dimension
$ULD36W2/A-D(U)

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Unit: inch
Dimensions
Model
A B C D E G
$ULD36W2/A-D(U) 37 20-7/8 32-1/4 24 19-1/8 18-1/8
AULD60W2/A-D(U)
Unit: inch
Dimensions
Model
A B C D E G
AULD60W2/A-D(U) 37 16-1/856-3/8 24-7/8 13-7/8 12-5/8
3.1.3 Diagram of Unit Installation Space and Location
(1) Diagram of installation space and location for outdoor unit (Notice: for best
performance of the outdoor unit, make sure its installation space conforms to
the following installation dimensions).

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1) When one outdoor unit is to be installed.
A~E HbHdH (Inches)
a
b
c
d
e
B
—
-
≥4"
-
-
-
A,B,C,
—
≥12" ≥4" ≥4"
-
-
B,E
—
-
≥4"
-
-
≥40"
A,B,C,E
—
≥12" ≥6" ≥6"
-
≥40"
D
—
-
-
-
≥40"
-
D,E
—
-
-
-
≥40" ≥40"
B,D
Hb＜HdHd＞H
-
≥4"
-
≥40"
-
Hb＞HdHd＜H - ≥4" - ≥40" -
B,D,E
Hb＜Hd
Hb≤1/2H
-
≥10"
-
≥79" ≥40"
1/2H＜Hb≤H
- ≥10" - ≥79" ≥40"
Hb＞H Prohibited
Hb＞Hd
Hd≤1/2H
-
≥4"
-
≥79" ≥40"
1/2H＜Hd≤H
- ≥8" - ≥79" ≥40"
Hd＞H
Prohibited

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2) When two or more outdoor units are to be installed side by side.
Unit: mm
A~E HbHdH (mm)
a
b
c
d
e
A,B,C — ≥12" ≥12" ≥40" - -
A,B,C,E — ≥12" ≥12" ≥40" - ≥40"
D — - - - ≥79" -
D,E
—
-
-
-
≥79" ≥40"
B,D
Hb＜HdHd＞H - ≥12" - ≥79" -
Hb＞Hd
Hd ≤ 1/2H
-
≥10"
-
≥79"
-
1/2H＜Hd ≤ H - ≥12" - ≥99" -
B,D,E
Hb＜Hd
Hb ≤ 1/2H - ≥12" - ≥79" ≥40"
1/2H＜Hb≤H - ≥12" - ≥99" ≥40"
Hb＞H Prohibited
Hb＞Hd
Hd ≤ 1/2H
-
≥10"
-
≥99" ≥40"
1/ 2H＜Hd ≤ H - ≥12" - ≥99" ≥40"
Hd＞H Prohibited
(16")
(16")

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3) When outdoor units are installed in rows.
Unit: Inch
Hb H
(Inch)
Hb ≤ 1/2H
b ≥ 10"
1/2H＜Hb ≤ H b ≥ 12"
Hb＞H Prohibited
4) When outdoor units are installed one above another.
Unit: Inch
(8")
(157-1/2")
(79")
(8")
(16")
(16")
(24")
(79")
(178")
(16")
(79")
(12")
(12")
(20")

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3.2 Unit Installation
3.2.1 Outdoor Unit Installation
(1) If the outdoor unit is installed on a solid ground such as concrete, use M10
screw bolts and nuts to secure the unit and make sure the unit stands erect and
level.
(2) Do not install it on top of the building.
(3) If it vibrates and causes noise, please add rubber cushion between the outdoor
unit and the installation base.
(4) Plugs and drainage connector are not recommended if there is an electrical
heater on the chassis.
3.2.2 Connection Pipe Installation
3.2.2.1 Installation Notice and Requirement on Connection Pipe
Installation method: Connect the connection pipes first to the unit. When bending a
connection pipe, be careful not to damage the pipe. Do not over-tighten the screw nut,
otherwise leakage will occur. Besides, the outside of connection pipe should be added
with a layer of insulating cotton to protect it from mechanical damage during installation,
maintenance and transportation.
Item
Model
Size of fitting
pipe(inch)
Maximum
pipe
length
feet(m)
Biggest drop between
indoor and outdoor
units
feet(m)
Liquid
pipe
Gas
pipe
AULD36W2/A-D(U)
AULD60W2/A-D(U) Φ3/8 Φ3/498.4(30) 49.2(15)
Connection pipe should adopt water-proof insulating material. Its wall thickness
should be 0.5-1.0mm and the pipe wall should be able to withstand 6.0MPa. The longer
the connection pipe is the worse cooling performance it has.

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3.2.2.2 Pipe Flaring
(1) Cut the connection pipe with a pipe cutter.
(2) The mouth of connection pipe should face downward. Remove burrs with the
cut surface so that the chips do not enter the pipe.
(3) Remove the cut-off valve of outdoor unit and take out the flare nut from the bag
of indoor unit accessories. Then fit the flare nut on the pipe and use a flaring
tool to flare the mouth of connection pipe.
(4) Check whether the flaring part has cracked. (See the figure below).
3.2.2.3 Pipe Bending
(1) The pipes are shaped by your hands. Be careful not to collapse them.
(2) Do not bend the pipes in an angle more than 90°.
(3) If the pipe is repeatedly bent or extended, it will become hard and difficult to be
bent or extended. So do not bend or extend the pipe for more than 3 times.
(4) When bending the pipe, do not bend it
excessively, otherwise it will get
broken. As shown beside, use a sharp
cutter to cut the heat insulating pipe
and bend it after the pipe is exposed.
After bending, place the heat
insulating pipe ba
ck on the pipeline
and fix it with adhesive tape.

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3.2.2.4 Connection Pipe Of The Units
①.Connect the pipe to the unit. Please follow the instructions stated in the figures
below. Use both spanner and torque wrench.
②.When connecting the tapered screw nut, first apply chilled machine oil on its
inner and outer surface and then screw it up for 3~4 circles.
③.Confirm the tightening torque by referring to the following table (If the screw
nut is over-twisted, it may be damaged and cause leakage).
④.Check whether gas leakage occurs to the connection pipe and then apply
thermal insulation, as shown below.
⑤.Wind sponge around the joint of gas pipe and heat insulation sheath of gas
collecting pipe.
⑥.Be sure to connect gas pipe after liquid pipe is connected.
3.2.2.4.1 Solder Connection
Screw on the flare nut of the flaring connecting pipe on the outdoor unit valve.

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3.2.2.4.2 Screw Connection
Pipe diameter (inch)
Tightening torque (N·m)
Ф1/4
15-30
Ф3/8
35-40
Ф1/2
45-50
Ф5/8
60-65
Ф3/4
70-75
Ф7/8
80-85
3.2.2.5 Sealing of the Knock-off Hole
As for the built-in valve model, during the installation process for connection pipe,
when the connection pipe is passing through the knock-off hole, conduct sealing with
insulated cotton in the knock-off hole of outdoor unit to prevent small animals from
entering. See the following figures.
3.2.3 Connection Pipe Vacuum Pumping and Leak Detection
3.2.3.1 Vacuum Pumping
①Make sure the outlet of vacuum pump is away from fire source and is
well-ventilated.
②Before vacuum pumping, make sure the unit cut-off valves are closed.
③
When vacuum pumping, both the liquid pipe and the gas pipe must be pumped.
(1) Remove the caps of the liquid valve, gas valve and also the service port.
(2) Connect the hoses at the low pressure and high pressure sides of the manifold
valve assembly to the service ports of the unit’s gas valve and liquid valve, and

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meanwhile the gas and liquid valves should be kept closed in case of
refrigerant leak.
(3) Connect the hose used for evacuation to the vacuum pump.
(4) Open the switch at the lower pressure side of the manifold valve assembly and
start the vacuum pump. Meanwhile, the switch at the high pressure side of the
manifold valve assembly should be kept closed, otherwise evacuation would
fail.
(5) The evacuation duration depends on the unit’s capacity, generally.
Model Time(min)
AULD36W2/A-D(U) 30
AULD60W2/A-D(U) 45
And verify if the pressure gauge at the low pressure side of the manifold valve
assembly reads -0.1MPa, if not, it indicates there is leak somewhere. Then, close the
switch fully and then stop the vacuum pump.
(6) Wait for 10min to see if the system pressure can remain unchanged. During this
time, the reading of the pressure gauge at the low pressure side can not be
larger than 0.005MPa.
(7) Slightly open the liquid valve and let some refrigerant go to the connection pipe
to balance the pressure inside and outside of the connection pipe, so that air
will not come into the connection pipe when removing the hose. Note that the
gas and liquid valve can be opened fully only after the manifold valve assembly
is removed.
(8) Place back the caps of the liquid valve, gas valve and also the service port.

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For large-size units, there are maintenance ports for liquid valve and
gas valve. During evacuation, you may connect the two hoses of the branch valve
assembly to the maintenance ports to speed up the evacuation.
3.2.4 Refrigerant Adding
See the following table for the amount of additional refrigerant.
Item
Model
Standard pipe
length
Unnecessary
charge pipe
length
Additional refrigerant
amount for extra pipe
AULD36W2/A-D(U)
AULD60W2/A-D(U) 24.6' ≤31.2' .32 oz per Ft
3.2.5 Installation of Drain Pipe
3.2.5.1 Outdoor Side Drainage Pipe
(1) If the outdoor unit is underneath the indoor unit, arrange the pipeline according
to the following diagram.
1) Drain hose should be placed on the ground and its end should not be
immersed into water. The whole pipeline should be supported and fixed
onto the wall.
2) Wind the insulating tape from bottom to top.
3) The whole pipeline should be wound with insulating tape and fixed onto the
wall with saddles.