Alpic Air DC Inverter Multi VRF System User manual

AOU-224VRDC3A
AOU-280VRDC3A
AOU-335VRDC3A
AOU-400VRDC3A
AOU-450VRDC3A
AOU-504VRDC3A
AOU-2460VRDC3A
D.C. Inverter
Multi VRF Modular
Air Conditioners
Owner's Manual
Thank you for choosing Air Conditioners, please read this owner’s manual carefully before
operation and retain it for future reference.

Preface
ALPICAIR DC Inverter Multi VRF System, with the most advanced technologies in the world, uses eco-
friendly refrigerant R410A as its cooling medium. For correct installation and operation, please read
this manual carefully. Before reading the manual, please note that:
(1) For safety operation, please strictly follow the instructions in this manual.
(2) During operation, the gross rated capacity of working IDU should be within the gross rated
capacity of ODU. Otherwise, IDU’s cooling/heating performance will be reduced.
(3) This manual must be in the hands of direct operators or maintenance men.
(4) In case of malfunction and operation failure, please examine the following items and contact
our authorized service centers as soon as possible.
1) Nameplate (model, cooling capacity, product code, ex-factory date).
2) Malfunction status (detail description of conditions before and after malfunction occurs)
(6) All units have been strictly tested and proved to be qualied before ex-factory. To avoid unit
damage or even operation failure which may be caused by improper disassembly, please do
not disassemble units by yourself. If disassembly is needed, please contact our authorized
serve centers for help.
(7) All graphics and information in this manual are only for reference. Manufacturer reserves the
right for changes in terms of sales or production at any time and without prior notice.
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 shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
DISPOSAL:Donot dispose this product as unsorted municipal waste. Collection of such waste
separately for special treatment is necessary.

Contents
1 Safety Notices (Please be sure to abide )..................................................................................... 1
2 Product Introduction ............................................................................................................................ 3
2.1 Names of Main Parts..................................................................................................................... 4
2.2 Combinations of Outdoor Units.................................................................................................... 4
2.3 Combinations of Indoor and Outdoor Units................................................................................ 5
2.4 The Range of Production Working Temperature....................................................................... 7
3 Preparation before Installation ............................................................................................................ 7
3.1 Standard Parts................................................................................................................................ 7
3.2 Installation Site............................................................................................................................... 7
3.3 Piping Work Requirements.........................................................................................................13
4 Installation Instruction ....................................................................................................................... 14
4.1 Physical Dimension of the Outdoor Unit and Mounting Hole ................................................14
4.2 Connection Pipe...........................................................................................................................16
4.3 Installation of the Connection Pipe............................................................................................ 27
4.4 Air Purging and Refrigerant Charge..........................................................................................32
4.5 Electric Wiring............................................................................................................................... 35
4.6 System Communication.............................................................................................................. 39
4.7 Connection Method and Steps for System Communication.................................................. 43
4.8 External Electrical Wiring Diagram............................................................................................ 48
5 Check Items after Installation and Trial Run ...................................................................................... 49
5.1 Check Items after Installation.....................................................................................................49
5.2 Trial Run........................................................................................................................................ 50
6 Common Malfunction and Troubleshooting...................................................................................... 63
7 Error Indication................................................................................................................................... 65
8 Maintenance and Care ....................................................................................................................... 69
8.1 Outdoor Heat Exchanger............................................................................................................ 69
8.2 Drain Pipe ..................................................................................................................................... 69
8.3 Notice before Seasonal Use.......................................................................................................69
8.4 Maintenance after Seasonal Use .............................................................................................. 70
8.5 Parts Replacement ...................................................................................................................... 70
9 After-sales Service .............................................................................................................................. 70

DC Inverter VRF
1
1 Safety Notices (Please be sure to abide )
Warning: If not abide strictly, it may cause severe damage to the unit or the people.
Note: If not abide strictly, it may cause slight or medium damage to the unit or the
people.
This sign indicates that the operation must be prohibited. Improper operation may
cause severe damage or death to people.
This sign indicates that the items must be observed. Improper operation may cause
damage to people or property.
WARNING!
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.
Follow this instruction to
complete the installation work.
Please carefully read this
manual before unit startup and
service.
Installation should be
conducted by dealer or
qualified personnel. Please do
not attempt to install the unit
by yourself. Improper handling
may result in water leakage,
electric shock or fire disaster
etc.
Before installation, please check
if the power supply is in
accordance with the
requirements specified on the
nameplate. And also take care of
the power safety.
Make sure the unit can be
earthed properly and soundly
after plugging into the socket
so as to avoid electric shock.
Please do not connect the
ground wire to gas pipe, water
pipe, lightning rod or
telephone line.
Be sure to use the exclusive
accessory and part to prevent
the water leakage, electric shock
and fire accidents.
If refrigerant leakage happens
during installation, please
ventilate immediately.
Poisonous gas will emerge if
the refrigerant gas meets fire.
Wire size of power cord should
be large enough.The damaged
power cord and connection wire
should be replaced by exclusive
cable.
After connecting the power
cord, please fix the electric
box cover properly in order to
avoid accident.

DC Inverter VRF
2
Never fail to comply with the
nitrigen charge
requirements.Charge nitrogen
when welding pipes.
Never short-circiut or cancel
the pressure switch to prevent
unit damage.
Please firstly connect the wired
controller before energization,
otherwise wired controller can
not be used.
Before using the unit, please
check if the piping and wiring
are correct to avoid water
leakage, refrigerant leakage,
electric shock, or fire etc.
Do not insert fingers or objects
into air outlet/inlet grille.
Open the door and window
and keep good ventilation in
the room to avoid oxygen
deficit when the gas/oil
supplied heating equipment is
used.
Never start up or shut off the air
conditioner by means of directly
plug or unplug the power cord.
Turn off the unit after it runs at
least five minutes; otherwise it
will influence oil return of the
compressor.
Do not allow children operate
this unit.
Do not operate this unit with
wet hands.
Turn off the unit or cut off the
power supply before cleaning
the unit, otherwise electric shock
or injury may happen.
Never spray or flush water
towards unit, otherwise
malfunction or electric shock
may happen.
Do not expose the unit to the
moist or corrosive
circumstances.
Electrify the unit 8 hours
before operation. Please
switch on for 8 hours before
operation. Do not cut off the
power when 24 hours
short-time halting (to protect
the compressor).

DC Inverter VRF
3
Volatile liquid, such as diluent or
gas will damage the unit
appearance.Only use soft cloth
with a little neutral detergent to
clean the outer casing of unit.
Under cooling mode, please
don't set the room temperature
too low and keep the
temperature difference
between indoor and outdoor
unit within 5.
If anything abnormal happens
(such as burning smell), please
power off the unit and cut off the
main power supply, and then
immerdiately contact ALPICAIR
appointed service center.If
abnormality keeps going, the
unit might be damaged and lead
to electric shock or fire.
User is not allowed to repair
the unit. Fault service may
cause electric shock or fire
accidents. Please contact
ALPICAIR appointed service
center for help.
ALPICAIR will not assume responsibility of personal injury or equipment damage caused by
improper installation and commission, unnecessary service and incapable of following the rules
and instructions listed in this manual.
DISPOSAL： Donot dispose this product as unsorted municipal waste. Collection of such waste
separately for special treatment is necessary.
2 Product Introduction
ALPICAIR Multi VRF Modular System adopts inverter compressor technology. According to
change the displacement of compressor, stepless capacity regulation within range of 10%-100%
can be realized. Various product lineup is provided with capacity range from 22.4kW to 246kW,
which can be widely used in working area and especially applicable to the place with variable load
change.ALPICAIR air conditioner is absolutely your best choice.

DC Inverter VRF
4
2.1 Names of Main Parts
Fig. 2.1.1
NO.
①
②
③
④
⑤
Name
Fan, Motor
Electric Box
Assembly
Valve interface
Power cord
through-hole
Communication
code through-hole
Note: The picture is only used for reference and the actual product prevails.
2.2 Combinations of Outdoor Units
Model(Single)
AOU-680VRDC3A AOU-730VRDC3A AOU-785VRDC3A AOU-850VRDC3A
Model(Combined)
AOU-280VRDC3A
+ AOU-400VRDC3A AOU-280VRDC3A + AOU-450VRDC3A AOU-280VRDC3A + AOU-504VRDC3A AOU-280VRDC3A + AOU-560VRDC3A
Model(Single)
AOU-900VRDC3A AOU-960VRDC3A AOU-1010VRDC3A AOU-1065VRDC3A
Model(Combined)
AOU-280VRDC3A
+ AOU-615VRDC3A AOU-335VRDC3A + AOU-615VRDC3A AOU-400VRDC3A + AOU-615VRDC3A AOU-450VRDC3A + AOU-615VRDC3A
Model(Single)
AOU-1130VRDC3A AOU-1180VRDC3A AOU-1235VRDC3A AOU-1300VRDC3A
Model(Combined)
AOU-504VRDC3A
+ AOU-615VRDC3A AOU-560VRDC3A + AOU-615VRDC3A AOU-615VRDC3A + AOU-615VRDC3A
AOU-280VRDC3A
+ AOU-450VRDC3A
+ AOU-560VRDC3A
Model(Single)
AOU-1350VRDC3A AOU-1410VRDC3A AOU-1460VRDC3A AOU-1515VRDC3A
Model(Combined)
AOU-280VRDC3A
+ AOU-450VRDC3A
+ AOU-615VRDC3A
AOU-335VRDC3A
+ AOU-450VRDC3A
+ AOU-615VRDC3A
AOU-280VRDC3A
+ AOU-560VRDC3A
+ AOU-615VRDC3A
AOU-280VRDC3A
+ AOU-615VRDC3A
+ AOU-615VRDC3A
Model(Single)
AOU-1580VRDC3A AOU-1630VRDC3A AOU-1685VRDC3A AOU-1750VRDC3A
Model(Combined)
AOU-280VRDC3A
+ AOU-615VRDC3A
+ AOU-615VRDC3A
AOU-400VRDC3A
+ AOU-615VRDC3A
+ AOU-615VRDC3A
AOU-450VRDC3A
+ AOU-615VRDC3A
+ AOU-615VRDC3A
AOU-504VRDC3A
+ AOU-615VRDC3A
+ AOU-615VRDC3A

DC Inverter VRF
5
Model(Single)
AOU-1800VRDC3A AOU-1845VRDC3A AOU-1908VRDC3A AOU-1962VRDC3A
Model(Combined)
AOU-560VRDC3A
+ AOU-615VRDC3A
+ AOU-615VRDC3A
AOU-615VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
AOU-280VRDC3A
+AOU-450VRDC3A
+AOU-560VRDC3A
+AOU-615VRDC3A
AOU-280VRDC3A
+AOU-504VRDC3A
+AOU-560VRDC3A
+AOU-615VRDC3A
Model(Single)
AOU-2016VRDC3A AOU-2072VRDC3A AOU-2028VRDC3A AOU-2184VRDC3A
Model(Combined)
AOU-280VRDC3A
+AOU-560VRDC3A
+AOU-560VRDC3A
+AOU-615VRDC3A
AOU-280VRDC3A
+AOU-560VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
AOU-280VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
AOU-335VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
Model(Single)
AOU-2240VRDC3A AOU-2295VRDC3A AOU-2350VRDC3A AOU-2405VRDC3A
Model(Combined)
AOU-400VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
AOU-450VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
AOU-504VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
AOU-560VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
+AOU-615VRDC3A
Model(Single)
AOU-2460VRDC3A
Model(Combined)
AOU-615VRDC3A+AOU-615VRDC3A
+AOU-615VRDC3A+AOU-615VRDC3A
Note：Any combination model is not allowed to be combined with the outdoor units belonging
to different series.
2.3 Combinations of Indoor and Outdoor Units
The following table indicates the number of IDU for ODU
ODU model
Max number of connectable IDU (unit)
AOU-224VRDC3A
13
AOU-280VRDC3A
16
AOU-335VRDC3A
19
AOU-400VRDC3A
23
AOU-450VRDC3A
26
AOU-504VRDC3A
29
AOU-560VRDC3A
33
AOU-615VRDC3A
36
AOU-680VRDC3A
39
AOU-730VRDC3A
43
AOU-785VRDC3A
46
AOU-850VRDC3A
50
AOU-900VRDC3A
53
AOU-960VRDC3A
56
AOU-1010VRDC3A
59
AOU-1065VRDC3A
63
AOU-1130VRDC3A
64
AOU-1180VRDC3A
64
AOU-1235VRDC3A
64
AOU-1300VRDC3A
64
AOU-1350VRDC3A
64
AOU-1410VRDC3A
66
AOU-1460VRDC3A
69

DC Inverter VRF
6
ODU model
Max number of connectable IDU (unit)
AOU-1515VRDC3A
71
AOU-1580VRDC3A
74
AOU-1630VRDC3A
77
AOU-1685VRDC3A
80
AOU-1750VRDC3A
80
AOU-1800VRDC3A
80
AOU-1845VRDC3A
80
AOU-1908VRDC3A
80
AOU-1962VRDC3A
80
AOU-2016VRDC3A
80
AOU-2072VRDC3A
80
AOU-2128VRDC3A
80
AOU-2184VRDC3A
80
AOU-2240VRDC3A
80
AOU-2295VRDC3A
80
AOU-2350VRDC3A
80
AOU-2405VRDC3A
80
AOU-2460VRDC3A
80
The total capacity of indoor units should be within 50%~135% of that of outdoor units.
Fig. 2.3.1
Fig. 2.3.1 is the combination view of the ODU of Modular DC Inverter Multi VRF System and
the IDU of Multi VRF System. IDU can be cassette type, one-way cassette type, wall-mounted
type, duct type, etc. When any one IDU receives operation signal, ODU will start to work according
to the capacity; when all IDUs stop, ODU will also stop.

DC Inverter VRF
7
2.4 The Range of Production Working Temperature
Cooling
Ambient temperature: -5℃~52℃
Heating
Ambient temperature: -20℃~24℃
When the indoor units are all VRF fresh air processor, the unit operating range is as follows:
Cooling
Ambient temperature: 16°C~45°C
Heating
Ambient temperature: -7°C~16°C
Note：Out of the working Temperature Range may damage this products and will invalidate
the warranty.
3 Preparation before Installation
Note: The picture is only used for reference and the actual product prevails. Unit: mm.
3.1 Standard Parts
Please use the following standard parts supplied by ALPICAIR.
Parts for Outdoor Unit
Number
Name
Picture
Quantity
Remarks
1
Owner's Manual
1
2
Wiring (match with
resistance)
1
Must be connected to the last IDU
of communication connection
3
Mark (Master )
2
Attach on the wired controller of
master IDU or on the front panel
3.2 Installation Site
Forbidden Items! It indicates that improper operation might lead to human casualty or
sever injury.
Items need to be followed. It indicates that improper operation might lead to personal
injury or property damage.
AOU-224VRDC3A
AOU-280VRDC3A
AOU-335VRDC3A
AOU-400VRDC3A
AOU-450VRDC3A
AOU-504VRDC3A
AOU-2460VRDC3A
D.C. Inverter
Multi VRF Modular
Air Conditioners
Owner's Manual
Thank you for choosing Air Conditioners, please read this owner’s manual carefully before
operation and retain it for future reference.

DC Inverter VRF
8
Install the unit at a place where
is adequate to withstand the
weight of the unit and make sure
the unit would not shake or fall
off.
Never expose the unit under
direct sunshine and
rainfall.Install the unit at a
place where is against dust,
typhoon and earthquake.
Try to keep the unit away from
combustible,inflammable and
corrosive gas or exhaust gas.
Leave some space for heat
exchanging and servicing so
as to guarantee unit normal
operation.
Keep the indoor and outdoor
units close to each other as
much as possible so as to
decrease the pipe length and
bends.
Never allow children to
approach to the unit and take
measures to prevent children
touching the unit.
3.2.1 When the outdoor unit is totally surrounded by walls, please refer to following
figures for space dimension.
3.2.1.1 Space dimension for single-module unit
Fig. 3.2.1

DC Inverter VRF
9
3.2.1.2 Space dimension for dual-module unit
Fig. 3.2.2
3.2.1.3 Space dimension for three-module unit
Fig. 3.2.3

DC Inverter VRF
10
3.2.1.4 Space dimension for four-module unit
Fig. 3.2.4
3.2.2 When there is wall (or similar obstruction) above the unit, keep the distance
between the unit top and the wall at least 3000mm or above. When the unit is located
in a totally open space with no obstructions in four directions, keep the distance
between the unit top and wall at least 1500mm or above (See Fig. 3.2.5). When space
is limited within 1500mm or the unit is not set in an open space, air return pipe is
required to be installed in order to keep good ventilation (See Fig. 3.2.6).
Fig. 3.2.5 Fig. 3.2.6

DC Inverter VRF
11
3.2.3 Space dimension for multiple-module unit
For keeping good ventilation, make sure there is no obstructions above the unit.
When the unit is located at a half-open space (front and left/right side is open), install the unit
as per the same or opposite direction.
Fig. 3.2.7
Fig. 3.2.8

DC Inverter VRF
12
3.2.4 Take seasonal wind into consideration when installing the outdoor unit
（1）Anti-monsoon installation requirements for unit not connecting exhaust duct:
Fig. 3.2.9

DC Inverter VRF
13
（2）Anti-monsoon installation requirements for unit connecting exhaust duct:
Fig. 3.2.10
3.2.5 Take snow into consideration when installing the outdoor unit
Fig. 3.2.11
3.3 Piping Work Requirements
Refer to the table below for piping work requirements.
R410A Refrigerant System
Outer Diameter (mm)
Wall Thickness (mm)
Type
Φ6.35
≥0.8
0
Φ9.52
≥0.8
0
Φ12.70
≥0.8
0
Φ15.9
≥1.0
0
Φ19.05
≥1.0
1/2H
Φ22.2
≥1.5
1/2H
Φ25.40
≥1.5
1/2H
Φ28.60
≥1.5
1/2H
Φ34.90
≥1.5
1/2H
Φ38.10
≥1.5
1/2H
Φ41.30
≥1.5
1/2H
Φ44.5
≥1.5
1/2H
Φ54.1
≥1.5
1/2H

DC Inverter VRF
14
4 Installation Instruction
4.1 Physical Dimension of the Outdoor Unit and Mounting Hole
Outline and Physical Dimention of AOU-224VRDC3A and AOU-280VRDC3A unit
Unit: mm
Fig. 4.1.1

DC Inverter VRF
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Outline and Physical Dimention of AOU-335VRDC3A, AOU-400VRDC3A and
AOU-450VRDC3A unit
Unit: mm
Fig. 4.1.2
Outline and Physical Dimention of AOU-504VRDC3A, AOU-560VRDC3A and
AOU-615VRDC3A unit
Unit: mm
Fig. 4.1.3

DC Inverter VRF
16
4.2 Connection Pipe
4.2.1 Schematic Diagram of Piping Connection
Fig. 4.2.1
4.2.2 Schematic Diagram of Piping Sequence
AOU-224VRDC3A and AOU-280VRDC3A
Fig. 4.2.2

DC Inverter VRF
17
AOU-335VRDC3A, AOU-400VRDC3A and AOU-450VRDC3A
Fig. 4.2.3
AOU-504VRDC3A, AOU-560VRDC3A and AOU-615VRDC3A
Fig. 4.2.4