Super Free Match Series
R410A Systems—BU module
Owner's Manual
Gree Air Conditioners
FXA2A-D
FXA3A-D
FXA2B-D
FXA3B-D
FXB5A-D
Thank you for choosing Gree air conditioners, please read this owner’s manual carefully before
operation and keep it for future reference.
GREE reserves the right to interpret this manual which will be subject to any change due to
product improvement without further notice.
GREE Electric Appliances, Inc. of Zhuhai reserves the final right to interpret this manual.
Preface
Super Free Match Series adopt the advanced manufacturing technology and takes the
environmental-friendly R410A as refrigerant, which is a green product in the 21st century. Please
carefully read the manual before installation and operation.
1) Super Free Match Series systems conform to design standard ARI 210240-2008.
2) To ensure safety when operating this system, please strictly follow the instructions in this
manual.
3) Make sure that the manual is kept by the operators or serviceman.
4) The refrigerant pipes and accessories must be designed exclusively for R410A.
5) The total capacity of the indoor units which runs at the same time cannot exceed the capacity of
the outdoor units; otherwise, the cooling (heating) effect of each indoor unit would be lower
than the nominal capacity.
6) In case of malfunction, please examine the following items and contact our appointed service
centers as soon as possible.
Nameplate (model, cooling capacity, product code, ex-factory date).
Malfunction status (detail description of conditions before and after malfunction occurs).
7) It is a normal phenomenon that the fan of indoor unit will still run for 20~70 seconds after the
indoor unit receives the “stop” signal so as to make full use of the waste heat.
8) When the work mode of the indoors is conflict with the modes of outdoor units, it will be
indicated on the display of the wired controller in five seconds and then the indoor unit will
stop. In this case, please harmonize their work modes: the cooling mode is compatible with the
dry mode.
9) If the supply power fails when the unit is running, then the indoor unit will send the “start”
signal to the outdoor unit three minutes later after the power recovery.
10) The power cable and transmission line must not be twisted together, but instead of separated
with an interval of at least 2cm; otherwise it may be result in communication problem.
11) 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.
12) 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 product must not be disposed together with the domestic waste. This product has
to be disposed at an authorized place for recycling of electrical and electronic appliances.
Thank you for purchasing GREE air conditioners. Before using, please read this
manual carefully and keep it properly for further reference.
Contents
1 Safety Precautions ......................................................................................................................... 1
2 Product Introduction ..................................................................................................................... 3
2.1 Names of Main Parts ......................................................................................................... 3
2.2 Combinations for Outdoor and Indoor Units .................................................................... 4
2.3 Parts and Components of Unit .......................................................................................... 4
2.4 Working Temperature Range ............................................................................................ 4
3 Selection of Installation Location and Precautions ....................................................................... 5
3.1 Selection of Installation Location ..................................................................................... 5
3.2 Outline Dimension and Servicing Space of FXA2A-D .................................................... 6
3.3 Outline Dimension and Servicing Space of FXA3A-D .................................................... 7
3.4 Outline Dimension and Servicing Space of FXA2B-D .................................................... 8
3.5 Outline Dimension and Servicing Space of FXA3B-D .................................................... 9
3.6 Outline Dimension and Servicing Space of FXB5A-D .................................................. 10
4 Installation Instruction ................................................................................................................ 11
5 Installation of Refrigerant Pipes ................................................................................................. 12
5.1 Allowable Length and Drop Height of Connecting Pipe ................................................ 12
5.2 Installation of Piping Adapter (FXA2A-D; FXA3A-D and FXB5A-D) ......................... 12
5.3 Installation of Piping Adapter (FXA2B-D and FXA3B-D) ............................................ 13
5.4 Precaution for Connection .............................................................................................. 15
6 Electrical Wiring Work ............................................................................................................... 17
6.1 Wiring Connection .......................................................................................................... 17
6.2 Requirements of Power Circuit and Cable ...................................................................... 17
6.3 Ground Requirements ..................................................................................................... 18
6.4 Precautions on the Electrical Wiring Work ..................................................................... 18
6.5 Precaution of Laying Wires ............................................................................................. 19
6.6 Procedures for Electrical Wiring Work ........................................................................... 19
6.7 Instructions for DIP Switch ............................................................................................. 21
7 Design of Drainage Pipeline ....................................................................................................... 22
7.1 Installation of Drain Hose ............................................................................................... 22
7.2 Design of Drainage Pipeline ........................................................................................... 22
8 Test Operation ............................................................................................................................. 22
9 Troubleshooting .......................................................................................................................... 23
10 After-Sales Service ..................................................................................................................... 23
BU Module
1
1 Safety Precautions
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible injury or
death.
WARNING
This mark indicates procedures which, if improperly performed, might lead to the
death or serious injury of the user.
CAUTION
This mark indicates procedures which, if improperly performed, might possibly result
in personal harm to the user, or damage to property.
NOTICE
NOTICE is used to address practices not related to personal injury.
WARNING
1) Instructions for installation and use of this product are provided by the manufacturer.
2) Installation must be performed in accordance with the requirements of NEC and CEC by appointed
personnel only.
3) The installation should be left to the appointed service center and according to the instructions given in the
manual. Improper installation may cause fall down, water leakage, electric shock or fire etc.
4) For operating the air conditioner pleasantly, please install it as outlined in this installation manual.
5) The power supply must adopt the special circuit with air switch protection and assure it has enough capacity
6) Connect the indoor unit, BU module and outdoor unit with the room air conditioner piping and cord
available from our standard parts. This installation manual describes the correct connections using the
installation set available from our standard parts.
7) Before installation, check the parameter of power cord and make sure that it complies with the power
supply requirement on the nameplate. Make sure the power supply is safe.
8) This air conditioner must be properly grounded through the receptacle to avoid electric shock. The ground
wire shouldn’t be connected with gas pipe, water pipe, lightning arrester or telephone line.
9) If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact
with a flame, it produces toxic gas.
10) Do not power on until all installation work is complete.
11) During installation, make sure that the refrigerant pipe is attached firmly before you start up the compressor.
Do not operate the compressor under the condition of refrigerant piping not attached properly with valve
open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.
12) When installing and relocating the air conditioner, do not mix gases except the specified refrigerant
(R410A) to enter the refrigerant cycle. If air or other gas enters the refrigerant cycle, the pressure inside the
cycle will rise to an abnormally high value and cause breakage, injury, etc.
13) 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.
14) Never cut off or damage power cables and transmission wires. If the power cable or transmission line were
damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to
avoid a hazard.
15) After the power cord is connected, please install the cover of electric box to avoid danger.
BU Module
2
16) When installing or relocating the unit, please contact the appointed service center for the repair or
relocation. Meanwhile the specialized parts and accessories must be used. Otherwise, it may result in water
leakage, electric shock or fire hazard.
17) Diameter of power cord must be large enough. Damaged power cord or connecting wire must be replaced
by specialized electric cable.
18) The power wire and transmission line must be more than one meter away from televisions or radios which
can emit electromagnetic waves to prevent image interference or noise. Otherwise, the unit maybe not work
19) Nitrogen must be charged according to technical requirements.
20) For units with wired controllers, do not connect power supply until the wired controller is well installed.
Otherwise, the wired controller cannot be used.
21) When installation is finished, please check and make sure the drain pipe, pipeline and electric wire are all
well connected so as to avoid water leakage, refrigerant leakage, electric shock and fire hazard.
22) Never extend fingers or objects into air outlet or return air grille.
23) Please keep the room well-ventilated and it could avoid oxygen deficit.
24) Never start or stop the air conditioner by inserting or removing the power cord.
25) Before startup of the compressor, please turn on the main power switch of the unit for more than 8 hours
and it makes sure that the heater belt of the compressor has been energized for at least eight hours! Once the
compressor is started, it must be guaranteed that it works continuously for at least 30 minutes, otherwise it
would be damaged!
26) Never operate the unit with wet hands. Otherwise, it may cause electric shock.
27) Before cleaning and repairing, it is necessary to stop working and turn off the power supply. Otherwise, it
may cause electric shock or damage.
28) Do not spray water on the air conditioner or it will cause malfunction or electric shock.
29) The air conditioner is not support to install in the circumstances as the following that where there is full of
mist of oil, damp or corrosive gas, flammable gases, the acidic or alkaline vapor and the ocean.
30) Volatile liquid like thinner or gasoline will damage the appearance of air conditioner. (Please use soft dry
cloth and wet cloth with mild detergent to clean unit’s appearance.)
31) Never standing or place objects on outdoor unit. Person or objects falling from the unit may cause injury.
32) If abnormal condition occurs (e.g. unpleasant smell), please turn off the unit at once and disconnect power
supply. Then contact appointed service center. If the air conditioner continues to operate despite of
abnormal condition, it may be damaged and cause electric shock or fire hazard.
33) The drain pipe should be installed as instructed in the manual to guarantee the proper drainage; meanwhile
it should be insulated to prevent condensing; otherwise the improper installation would cause water leakage
and then wet the household wares in the room.
34) Don't attempt to repair the air conditioner by yourself. The improper repair will lead to electric shock or
fire, please contact the appointed service center and ask professional technicians to repair it.
35) Please take notice of the installation foundation of the unit after long use, if it is damaged, it may lead to the
fall of the unit and cause the injury.
36) Be sure to shut off the power supply when you do not use the air conditioner for a long time. Otherwise, the
dusts may accumulate in it, which may cause overheating or fire hazards.
37) Gree Electric Appliances, Inc. of Zhuhai is not responsible for any personal injury or property loss caused
by improper installation, improper debugging, unnecessary repair or not following the instructions of this
manual.
BU Module
3
2 Product Introduction
The BU module of Gree Super Free Match Series is the latest branch device, which adopts the
intelligent control technology. Respond to the changes in load of the indoor units, it can coordinate
the flow rate of the refrigerant well. Otherwise, it is very compact and has a flexible choice about the
installation location, such as the ceiling of parlor, corridor, balcony,storeroomand etc.
2.1 Names of Main Parts
a) FXA2A-D b) FXA3A-D
c) FXA2B-D d) FXA3B-D
e) FXB5A-D
NO.
① ② ③ ④
Name
Gas piping of indoor unit
side
Liquid piping of indoor
unit side
Hanger metal
Electrical
equipment plate
NO.
⑤ ⑥ ⑦ ⑧
Name
Liquid piping of outdoor
unit side
Gas piping of outdoor unit
side
Drain hole
Printed circuit
board
Fig. 1
BU Module
4
2.2 Combinations for Outdoor and Indoor Units
Table 1
Sorts FXA2A-D and FXA2B-D FXA3A-D and FXA3B-D
FXB5A-D
No. of connectable
indoor units
1 1 1 niM
5 3 2 xaM
2.3 Parts and Components of Unit
For the Super Free Match Series, one outdoor unit is able to drive up to three BU modules and
nine indoor units which include cassette type, duct type, wall-mounted type, floor ceiling type and
console type. The outdoor unit will run as long as any one indoor unit receives the running command,
and all indoor units stop once the outdoor unit is turned off.
Fig. 2
2.4 Working Temperature Range
Table 2
(BD :erutarepmet edistuO stroS ℃/℉)
05 mumixaM ℃(122℉)
51- muminiM ℃(5℉)
Outdoor unit
Power supply wire for outdoor
unit and BU module(3 wires)
Connection pipe
Transmission line(2 wires)
Power supply wire for
indoor unit(4 wires)
Ground
Power
(60Hz, 208/230V)
Power
(60Hz, 208/230V)
Power
(60Hz, 208/230V)
Power
(60Hz, 208/230V)
Ground
Ground
The 1st
branch
The 2nd
branch
BU 1
BU 2
BU 3
Indoor unit
Duct type
Duct type
Wall mounted
type
Wall mounted
type
Wall mounted
type
Cassette type
Cassette type
Floor ceiling
type
Console type
Ground
BU Module
5
3 Selection of Installation Location and Precautions
WARNING
1) The installation of the air conditioner must be in accordance with the national and local laws and
regulations.
2) The quality of the installation will affect the capability of air conditioner directly. The installation
should be left to the appointed service center. Please contact your dealer after purchasing this machine.
Professional installation workers will provide installation and test services according to the installation
manual.
3) The air conditioner should not install in this place where the small animals exist, because they may
cause malfunctions, smoke or fire. Please keep the area around the unit clean.
3.1 Selection of Installation Location
WARNING
1) The BU module must be installed on a firm and solid support which can withstand the weight of the
module and the mounting surface must be horizontal plane. The BU module can be chosen to install in
the ceiling, such as the ceiling of parlor, corridor, balcony, storeroom and etc.
2) The location must be out of children’s reach, please keep the unit away from children.
3) The BU module is for indoor use. If installing in the outdoors, the location must be away from wind and
rain. Otherwise, it maybe causes water leakage, electric shocks or fire etc.
4) There is enough space for the installation and maintenance.
5) Avoid direct sunlight or other heat sources exist.
6) Do not install in location that is hot or humid for long periods of time.
7) Avoid the BU module installed in the bedroom and study, where these places need to be quiet.
8) BU module cannot be installed in the place of inflammable and explosive materials and severe dust,
smoke and the other air pollution, such as the kitchen.
9) There is enough space to install drainage pipe, so that the condensed water can be discharged.
10) Installation at the following places might lead to the air conditioner malfunction, such as where is full of
machine oil, saline-sodic soil near the sea, sulphide fog, high frequency facilities or special conditions.
If it is unavoidable, please contact the appointed service center.
NOTICE
1) Make sure that the unit will not cause any operating vibration or noise after installation.
2) BU module shall be installed close to the indoor unit, hence to minimize the length and bends of
cooling pipe.
BU Module
6
3.2 Outline Dimension and Servicing Space of FXA2A-D
1) Outline dimension
Fig. 3 (mm)
Table 3
Sorts
Indoor unit side (mm/inch)
Outdoor unit side (mm/inch)
Port A Port B
Liquid pipe Φ6.35(1/4) Φ6.35(1/4) Φ9.52(3/8)
Gas pipe Φ9.52(3/8) Φ9.52(3/8) Φ15.9(5/8)
2) Installation and service space
NO.
① ②
③
Name Servicing space Ceiling Electrical box side
Fig. 4 (mm)
BU Module
7
3.3 Outline Dimension and Servicing Space of FXA3A-D
1) Outline dimension
Fig. 5 (mm)
Table 4
Sorts
Indoor unit side (mm/inch)
Outdoor unit side
(mm/inch)
Port A Port B Port C
Liquid pipe Φ6.35(1/4) Φ6.35(1/4) Φ6.35(1/4) Φ9.52(3/8)
Gas liquid Φ9.52(3/8) Φ9.52(3/8) Φ9.52(3/8) Φ15.9(5/8)
2) Installation and service space
NO.
① ②
③
Name Servicing space Ceiling Electrical box side
Fig. 6 (mm)
BU Module
8
3.4 Outline Dimension and Servicing Space of FXA2B-D
1) Outline dimension
Fig. 7 (mm)
Table 5
Sorts
Indoor unit side (mm/inch)
Outdoor unit side (mm/inch)
Port A Port B
Liquid pipe Φ6.5(1/4) Φ6.5(1/4) Φ9.7(3/8)
Gas pipe Φ16.3(5/8) Φ16.3(5/8) Φ16.3(5/8)
2) Installation and service space
NO.
① ②
③
Name Servicing space Ceiling Electrical box side
Fig. 8 (mm)
BU Module
9
3.5 Outline Dimension and Servicing Space of FXA3B-D
1) Outline dimension
Fig. 9 (mm)
Table 6
Sorts
Indoor unit side (mm/inch)
Outdoor unit side
(mm/inch)
Port A Port B Port C
Liquid pipe Φ6.5(1/4) Φ6.5(1/4) Φ6.5(1/4) Φ9.7(3/8)
Gas liquid Φ16.3(5/8) Φ16.3(5/8) Φ16.3(5/8) Φ16.3(5/8)
2) Installation and service space
NO.
① ②
③
Name Servicing space Ceiling Electrical box side
Fig. 10 (mm)
BU Module
10
3.6 Outline Dimension and Servicing Space of FXB5A-D
1) Outline dimension
Fig. 11 (mm)
Table 7
Sorts Indoor unit side (mm/inch) Outdoor unit side (mm/inch)
Liquid pipe Φ6.35(1/4) Φ9.52(3/8)
Gas pipe Φ9.52(3/8) Φ15.9(5/8)
2) Installation and service space
NO.
① ②
③
Name Servicing space Ceiling Electrical box side
Fig. 12 (mm)
BU Module
11
4 Installation Instruction
1) Check the installation location and ensure it is strength and level. Otherwise, there should be
enough space to install drainage pipe, so that the condensed water can be discharged.
2) Reference to the size of hanger metal and drill 4 holes in the installation location.
3) Hang the hanger bolts.
Fig. 13
4) Fix the modules securely with the hanger bolts. You can get the M10 or M8 hanger bolts, nuts
and washers from the market.
Fig. 14 (mm)
5) Adjusting the nuts position, so that the BU module should be level in front/back and left/right.
BU Module
12
5 Installation of Refrigerant Pipes
5.1 Allowable Length and Drop Height of Connecting Pipe
Fig. 15 (8 indoor units)
Table 8
The sorts The pipes Length(m/feet)
Maximum
allowable
length
Total length between outdoor unit and BU
modules
L1+L2+L3+L4+L5 ≤55(181)
Total length
between indoor
units and BU
GWHD(48S)ND3CO
1A+1B+1C+2A+2B+2C+
3A+3B
≤80(263)
GWHD(56S)ND3CO ≤90(295)
Between indoor unit and BU module 1A;1B;1C;2A;2B;2C;3A;3B ≤15(49)
Between indoor unit and the 1st branch
L4+1B;L2+L5+2A;
L2+L3+3B
≤40(131)
Maximum
allowable
length
Between outdoor and indoor units H1 ≤30(99)
Between outdoor units and BU modules H2 ≤30(99)
Between BU and BU modules H3 ≤15(49)
Between indoor and indoor units H4 ≤15(49)
Minimum
allowable
length
Between outdoor and the 1st branch L1 ≥5(16)
Between BU and the branch L3;L4;L5
as possible as
short
NOTICE! BU module should be placed within the level between the outdoor unit and indoor
unit.
5.2 Installation of Piping Adapter (FXA2A-D; FXA3A-D and FXB5A-D)
If the piping connection size of BU module does not match with that of the outdoor unit and
indoor units, it should prevail with the piping connection size of the outdoor unit and indoor units.
BU Module
13
Install the optional piping adapters to the BU module, so that the piping connection size of BU
module can match with that of the outdoor unit and indoor units.
1) Piping adapter(Optional accessories)
Table 9
NO. Name
Port A
(mm/inch)
Port B
(mm/inch)
1 Φ15.9→Φ19.05 Φ15.9(5/8) Φ19.05(3/4)
2 Φ9.52→Φ12.7 Φ9.52(3/8) Φ12.7(1/2)
3 Φ9.52→Φ15.9 Φ9.52(3/8) Φ15.9(5/8)
4 Φ6.35→Φ9.52 Φ6.35(1/4) Φ9.52(3/4)
Fig. 16
2) Install the piping adapter
① Refer to the piping connection size of the outdoor unit and indoor units, the appropriate piping
adapter should be adopted.
② Align the flared end of copper tube with the center of pipe joint. Tighten the nuts with hands.
Then tighten the flaring nuts with torque wrench until you hear a “click”.
Fig. 17
3) Sealing the unconnected port
If the port of BU module indoor side does not connected to one indoor unit, the port must be
sealed to prevent refrigerant leaks. Please tighten the copper flaring nuts to the unconnected port
with torque wrench until you hear a “click”.
5.3 Installation of Piping Adapter (FXA2B-D and FXA3B-D)
If the piping connection size of BU module does not match with that of the outdoor unit and
indoor units, it should prevail with the piping connection size of the outdoor unit and indoor units.
Braze the optional piping adapters to the BU module, so that the piping connection size of BU
module can match with that of the outdoor unit and indoor units.
1) Piping adapter(Standard accessories)
BU Module
14
Fig. 18
2) Brazing the piping adapter
① If the connection size of the pipe adapter selected is different from the piping connection size of
BU module, cut the tube of the piping adapter from middle with tube cutter and remove the
burrs.
② To avoid heat damage the internal structure of the BU module, wrap the pipes to be brazed with
sufficient wet cloths.
③ After brazing, use wet cloths to cool off the pipes to be brazed sufficient.
Fig. 19
3) Sealing the unconnected port
If the port of BU module indoor side does not connected to one indoor unit, the port must be
sealed to prevent refrigerant leaks.
① Select the appropriate piping adapter.
② Pinch the end of the chosen piping.
③ To avoid heat damage the internal structure of the BU module, wrap the pipes to be brazed with
sufficient wet cloths.
BU Module
15
Fig. 20
④ After brazing, use wet cloths to cool off the pipes to be brazed sufficient.
5.4 Precaution for Connection
CAUTION
1) Conform to the following principles during pipe connection: Outdoor unit shall be installed close to the
indoor unit, hence to minimize the length and bends of connection pipes; the height gap of outdoor unit
and indoor units should be as small as possible; the radius of curvature should be as large as possible.
2) The brazing operation must be strictly in accordance with the process requirements. Rosin joint or pin
hole is not allowed.
3) During the installation, do not damage the pipeline. The pipeline’s radius of bending must be over than
200mm (8inch). The pipes cannot repeatedly be bent or straightened. Otherwise it will get harden and
crack. Do not bend or straight the pipes for more than 3 times at the same position.
1) The process of flaring
① Using the tube cutter to cut the connecting pipe in the appropriate place and remove the burrs.
② Install the nut before the flaring operation.
③ Check the flared portion, whether there is fractured or not.
Fig. 21
2) Precaution for elbow operation
① The elbow operation could be done by hands. Be careful and do not damage the pipe.
BU Module
16
Fig. 22
② If the thermal insulation of the refrigerant pipe is not removed, please do not bend the pipe.
Otherwise, it maybe leads the pipe to crack. It is better to make an incision with a knife in the
thermal insulation and removes it. After elbow operation is finished, recover the thermal
insulation with binding band.
3) The process of install refrigerant pipes
① Remove the screw caps from the pipes.
② Align the flared end of copper tube with the center of pipe joint. Tighten the nuts by hands. (If
the flared end of copper tube and the center of pipe joint are not in coaxial, it is hard to tighten
the nuts by hands, please do not tighten it with spanners, because the screw thread may be
broken by force).
③ Tighten the flaring nuts with torque wrench until you hear a “click”. (The spanner and torque
wrench should be perpendicular to the refrigerant pipeline).
④ The following table for the torque required to tighten the nuts.
Tabl e 1 0
Pipe
diameter
(mm/inch)
Thickness of
copper
tube(mm/inch)
Tightening
torque
(N·m/1bf·ft)
Φ6.35(1/4) ≥0.8(1/32) 15～30(11~22)
Φ9.52(3/8) ≥0.8(1/32) 35～40(26~29)
Φ12.7(1/2) ≥0.8(1/32) 45～50(33~37)
Φ15.9(5/8) ≥1.0(1/25) 60～65(44~48)
Φ19.05(3/4) ≥1.0(1/25) 70～75(52~55)
Fig. 23
CAUTION
1) During the connection of the indoor unit and BU module to the refrigerant pipe, never pull any joints of
the indoor unit and the BU module by force; otherwise the capillary pipe or other pipe may crack,
which then would result in leakage.
2) The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of
it.
3) For the Super Free Match system, each pipe should be labeled to tell which system it belongs to avoid
mistaken inaccurate piping.
BU Module
17
6 Electrical Wiring Work
6.1 Wiring Connection
NOTICE! The “L1”, “3” terminals are connected to the live wire, the “L2”,”N(1)” terminals
are connected to the neutral wire and the ”2” terminal is connected to the transmission line.
Fig. 24
6.2 Requirements of Power Circuit and Cable
Tabl e 11
Phase and frequency 1Ph,60Hz
Voltage 208/230V
Recommended cable of outdoor unit
(Pieces × Sectional area)
GWHD(48S)ND3CO
3×6.0 mm
2
GWHD(56S)ND3CO
Recommended cable of BU module (Pieces × Sectional area) 3×0.75 mm2
Transmission line (Pieces × Sectional area) 2×1.5 mm2
Recommended cable of indoor unit (Pieces × Sectional area) 4×0.75mm2
Capacity of the air switch
GWHD(48S)ND3CO 40A
GWHD(56S)ND3CO 40A
BU module 10A
NOTICE
1) The total length of the transmission line between the outdoor unit and the furthest BU module is not
more than 55m (180feet). Otherwise, the system cannot work possibility.
2) The specifications of the power cable and transmission line listed in the table above are determined
based on the maximum power (maximum amps) of the unit.
3) The specifications of the power cable listed in the table above are applied to the conduit-guarded
BU Module
18
multi-wire copper cable (like, YJV copper cable, consisting of PE insulated wires and a PVC cable
jacket) used at 40℃(104℉) and resistible to 90℃(194℉), and shall be at least those of ordinary
polychloroprene sheathed cords. If the working condition changes, they should be modified according
to the related national standard.
4) The specifications of the air switch listed in the table above are applied to the breaker with the working
temperature at 40℃(104℉). If the working condition changes, they should be modified according to the
related national standard.
5) The length of the recommended power cable should be less than 15meters(49feet); otherwise, the
diameter of the power cable is not enough.
6) Mentioned power cable and transmission line length is just a reference value. It may be different
depending on the condition of installation, humidity or materials, etc.
7) An all-pole disconnection switch having a contact separation of at least 3mm(1/8 inch) in all poles
should be connected in fixed wiring.
6.3 Ground Requirements
WARNING
1) The air conditioner is classified into the Class I appliances, so its ground ways must be reliable.
2) The ground wire must be fixed on the screw hole with the sign as the right figure.
3) The yellow-green wire of the air conditioner is the ground wire and must be fixed by the tapping screw.
And it cannot be used for other purpose or cut off. Otherwise, it will cause the hazard of electric shock.
4) The reliable ground terminal should be provided and the ground wire cannot be connected to any of the
following places: a. Water pipe; b. Coal gas pipe; c. Sewage pipe; d. Lightning rod
e. Telephone line f. Other unreliable places considered by a professional.
6.4 Precautions on the Electrical Wiring Work
WARNING
1) The electrical installation should be carried out by the professional as instructed by the local laws,
regulations and also this manual.
2) The ground connection should be reliable and the ground wire should be connected to the dedicated
device of the building by the professional.
3) Before starting work, the power must not be supplied to the unit.
4) The air switch coupled with the leakage current protection switch must be equipped in the circuits,
which is of enough capacity and of both magnetic and thermal tripping functions in case of the short
circuit and overload.
5) The electrical work should use a cable length enough to cover the entire distance with no connection. If
it is unavoidable, please make sure the connection should be reliable, the external forces will not act on
the wires and the joint is not bared. Otherwise it will cause electrical shock or fire etc.
6) The power cable with the rated voltage and exclusive circuit for the air conditioner should be used.
7) Do not pull the power cable by force after it is installed.
8) The diameter of the power cable should be large enough and once it is damaged, it must be replaced by
the dedicated one.
9) The multi-wire copper cable should be used for the power cable and the transmission line.
BU Module
19
6.5 Precaution of Laying Wires
1) Use a wire stripper to strip off a length of the insulation layer at the end of the wires;
2) Loosen the screws on the terminal block of the air conditioner;
3) Press the ends of the cable tightly onto the round terminals corresponding to the size of the
screws.
4) Pass the screw through the round terminals and fix it onto the terminal block.
Fig. 25
6.6 Procedures for Electrical Wiring Work
1) Unscrew the electrical equipment plate.
2) The structure of behind the electrical equipment plate.
a) FXA2A-D and FXA2B-D
BU Module
20
b) FXA3A-D and FXA3B-D
c) FXB5A-D
NO. 1 2 3
Name
Terminal black for BU
module power supply
Terminal black for
transmission line
Ground screw
NO. 4 5 6
Name
Terminal black for indoor
unit power supply
DIP switch Printed circuit board
Fig. 26
3) Let the power cable and transmission line go through the rubber ring. In order to protect the
power cable and transmission line from damaging by the hole, the rubber ring cannot fall from
that, otherwise, it may cause electrical shock or fire etc.
4) Connect the power cable of the BU module to the L1, L2 terminals with the sign of Power and
as well as the ground screw.
5) Connect the transmission line of the BU module to the N(1), 2 terminals with the sign of
Outdoor unit/BU module.
6) If the transmission line need to be connected to the other BU module, please connect the extra
BU Module
21
line to the N(1), 2 terminals with the sign of BU module.
7) Connect the power cable of the indoor unit to the N(1), 2 and 3 terminals with the sign of
Indoor unit A (B, C, D and E) and as well as the ground screw.
8) Fix the power cable and transmission line firmly by cable fixing clip.
9) Screw the electrical equipment plate.
CAUTION
1) The transmission line and the power cable must be separated with an interval of at least 2cm (3/4inch);
otherwise it may be result in communication problem.
2) Confirm the each cable connected to the terminal screw is exactly and securely after finishing the
electric work.
3) Fix each ground wire separately with the ground screw.
4) When connecting indoor units, make sure to connect refrigerant pipes and power cables to the same
connection ports marked with matching signs (A, B, C ,D and E).
5) If the connecting wire is connected to the terminal incorrectly, the unit will not work normally.
6) The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of
it.
7) For the Super Free Match system, each pipe should be labeled to tell which system it belongs to avoid
mistaken inaccurate piping.
6.7 Instructions for DIP Switch
2 digits DIP is adopted to assign the address when using multi-BU modules and the address
cannot be repeated in the same unit.
One outdoor unit can connect to no more than 3 BU modules.
“ON” side means "ON" and the opposite side represents "OFF".
NOTICE!: The black part is lever.
Table 12
Number
DIP Code
Icon Address
DIP 1 DIP 2
1 OFF OFF BU 1
2 OFF ON
BU 2
3 ON OFF BU 3
BU Module
22
7 Design of Drainage Pipeline
7.1 Installation of Drain Hose
1) Remove the rubber stopper of drain hole.
2) Connect the drain hose to the drain hole of BU module.
3) The drain hose should be kept at 5~10 degrees of gradient to facilitate discharge of the
condensing water. Take care that does not exert too much force on the hose.
4) Thermal insulation materials should be placed at the joints of the drain hose so as to prevent
from dew condensation. Fix the drain hose firmly by binding band.
Fig. 27
5) The end of the drain hose should be inserted into the hole of drainage pipeline.
7.2 Design of Drainage Pipeline
1) The drainage pipeline should be kept at a certain gradient (1/50—1/100) so as to avoid bulges
of pipes where there might be water bends.
2) The drainage pipeline is form of the hard PVC pipes for common purposes which can be
purchased locally. The diameter of the PVC pipes is not less than 31mm (1-1/4inch) and the
pipeline should be fixed as close to the BU module as possible.
3) Insert the drain hose into the drain hole of drainage pipeline. Use binding band to fix it tightly.
It is not allowed to use adhesive glue to join the drain hose to the drainage hole.
4) When the drainage pipeline is laid for a couple of units, the position of the shared pipeline
should be approximately 100mm lower than the drainage hole of each module. In this case,
some special-purpose pipes with thicker walls will be used.
NOTICE! At intervals of about 1 meter (3-1/4feet), fix the drain pipes to the wall with
brackets, not floating in the air.
8 Test Operation
After all the installation has been accomplished, follow the “operation test” as described in the
outdoor unit owner’s manual.
BU Module
23
9 Troubleshooting
WARNING
1) In the event of abnormal conditions (like, stinky smell), please shut off the power supply immediately
and then contact the appointed service center; otherwise, the abnormal running would damage the air
conditioner and also would cause electric shock or fire hazard .
2) Do not repair the air conditioning personally but instead contact the professionally skilled personnel at
the appointed service center, as the incorrect repair would cause electric shock or fire hazard etc.
Table 13
Errors
Indicating LED flashing times
Indoor
unit error
code
Outdoor unit error
code
Yellow
LED
Green
LED
Red
LED
BU 1 is connected
Flash 1 time
BU 2 is connected
Flash 2 times
BU 3 is connected
Flash 3 times
Indoor unit A is connected
Flash 1 time
Indoor unit B is connected
Flash 2 times
Indoor unit C is connected
Flash 3 times
Indoor unit D is connected
Flash 4 times
Indoor unit E is connected
Flash 5 times
Indoor unit A gas tube
temperature sensor error
Flash 1
time
b7
b7 indoor unit
address
Indoor unit A liquid tube
temperature sensor error
Flash 2
times
b5
b5 indoor unit
address
Indoor unit B gas tube
temperature sensor error
Flash 3
times
b7
b7 indoor unit
address
Indoor unit B liquid tube
temperature sensor error
Flash 4
times
b5
b5 indoor unit
address
Indoor unit C gas tube
temperature sensor error
Flash 5
times
b7
b7 indoor unit
address
Indoor unit C liquid tube
temperature sensor error
Flash 6
times
b5
b5 indoor unit
address
Indoor unit D gas tube
temperature sensor error
Flash 7
time
b7
b7 indoor unit
address
Indoor unit D liquid tube
temperature sensor error
Flash 8
times
b5
b5 indoor unit
address
Indoor unit E gas tube
temperature sensor error
Flash 9
time
b7
b7 indoor unit
address
Indoor unit E liquid tube
temperature sensor error
Flash 10
times
b5
b5 indoor unit
address
10 After-Sales Service
If there is any quality or other issue, please contact the after-sales service center.
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
Add: West Jinji Rd, Qianshan, Zhuhai, Guangdong, China, 519070
Tel: (+86-756) 8522218 Fax: (+86-756) 8669426
E-mail: gree@gree.com.cn www.gree.com
66174100032
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