Multi Variable Air Conditioners Ducted Type Indoor Unit

Multi Variable Air Conditioners Ducted Type Indoor Unit
Multi Variable Air Conditioners
Ducted Type Indoor Unit
Owner's Manual
Air Conditioners
Models:
GMV-ND07PLS/A-T(U)
GMV-ND09PLS/A-T(U)
GMV-ND12PLS/A-T(U)
GMV-ND14PLS/A-T(U)
GMV-ND18PLS/A-T(U)
GMV-ND22PLS/A-T(U)
 Thank you for choosing Air Conditioners, please read this owner‟s manual carefully
before operation and retain it for future reference.
Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
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 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 authorized
personnel only.
(3) For the safe operation of this unit, please read and follow the instructions carefully.
(4) During operation, total capacity of indoor units should not exceed the total capacity of outdoor units.
Otherwise, poor effect of cooling or heating may result.
(5) Direct operators or maintainers should well keep this manual.
(6) If this unit fails to operate normally, please contact our service center as soon as possible and provide the
following information:
1) Content on the nameplate (model number, cooling capacity, production codex-factory date.
2) Malfunction details (before and after the malfunction occurs.
(7) Each unit has been strictly tested and proved to be qualified before ex-factory. In order to prevent units from
being damaged or operating normally because of improper disassembly, please do not disassemble the unit
by yourself. If you need to disassemble and check units, please contact our service center. We will send
specialists to guide the disassembly.
(8) All graphics in this manual is only for your reference. For sales or production reasons, these graphics are
subject to change by manufacturer without prior notice.
User Notice
 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.
 DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of
such waste separately for special treatment is necessary.
Contents
1 Safety Precautions ............................................................................... 1
2 Product Introduction ............................................................................. 2
2.1 Names of Key Components ...................................................................... 2
2.2 Rated Working Condition.......................................................................... 2
3 Preparations for Installation .................................................................. 3
3.1 Standard Fittings ...................................................................................... 3
3.2 Location for Installation ............................................................................. 3
3.3 Requirements for Communication Line .................................................... 4
3.4 Electric Installation .................................................................................... 5
4 Installation Instructions ......................................................................... 6
4.1 Installation of Indoor Unit .......................................................................... 6
4.2 Refrigerant Pipe Connection .................................................................... 8
4.3 Drainage Pipe Installation and Drainage System Testing ........................ 9
4.4 Installation of Air Duct ............................................................................. 12
4.5 Installation of Wired Controller ............................................................... 15
5 Wiring Work ....................................................................................... 15
5.1 Connection of Wire and Patch Board Terminal ...................................... 15
5.2 Power Cord Connection ......................................................................... 16
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit (or indoor unit) ....................................................................................... 17
5.4 Connect Communication Wire of Wired Controller ................................. 17
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network18
6 Routine Maintenance ......................................................................... 20
6.1 Cleaning of Filter .................................................................................... 20
6.2 Maintenance before the Seasonal Use .................................................. 20
6.3 Maintenance after the Seasonal Use ..................................................... 20
7 Table of Error Codes for Indoor Unit .................................................. 21
8 Troubleshooting ................................................................................. 21
Multi Variable Air Conditioners Duct Type Indoor Unit
1 Safety Precautions
WARNING
(1) Follow this instruction to complete the installation work. Please carefully read this manual before unit
startup and service.
(2) Wire size of power cord should be large enough. The damaged power cord and connection wire should be
replaced by exclusive cable.
(3) After connecting the power cord, please fix the electric box cover properly in order to avoid accident.
(4) Never fail to comply with the nitrogen charge requirements. Charge nitrogen when welding pipes.
(5) Never short-circuit or cancel the pressure switch to prevent unit damage.
(6) Please firstly connect the wired controller before energization, otherwise wired controller can not be used.
(7) Before using the unit, please check if the piping and wiring are correct to avoid water leakage, refrigerant
leakage, electric shock, or fire etc.
(8) Do not insert fingers or objects into air outlet/inlet grille.
(9) 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.
(10) Never start up or shut off the air conditioner by means of directly plug or unplug the power cord.
(11) Turn off the unit after it runs at least five minutes; otherwise it will influence oil return of the compressor.
(12) Do not allow children operate this unit.
(13) Do not operate this unit with wet hands.
(14) Turn off the unit or cut off the power supply before cleaning the unit, otherwise electric shock or injury
may happen.
(15) Never spray or flush water towards unit, otherwise malfunction or electric shock may happen.
(16) Do not expose the unit to the moist or corrosive circumstances.
(17) Under cooling mode, please don't set the room temperature too low and keep the temperature difference
between indoor and outdoor unit within 5℃ (41℉).
(18) User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents. Please
contact AC PRO appointed service center for help.
(19) 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.
(20) 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.
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Multi Variable Air Conditioners Ducted Type Indoor Unit
(21) Be sure to use the exclusive accessory and part to prevent the water leakage, electric shock and fire
accidents.
(22) 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.
(23) 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).
(24) If refrigerant leakage happens during installation, please ventilate immediately. Poisonous gas will
emerge if the refrigerant gas meets fire.
(25) 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.
(26) If anything abnormal happens (such as burning smell), please power off the unit and cut off the main
power supply, and then immediately contact AC PRO appointed service center. If abnormality keeps going,
the unit might be damaged and lead to electric shock or fire.
Any personal injury or property loss caused by improper installation, improper debug,
unnecessary repair or not following the instructions of this manual should not be the responsibility
of AC PRO.
2 Product Introduction
2.1 Names of Key Components
No.
①
②
③
Name
Air Outlet
Air-return Opening
Drain Pipe
2.2 Rated Working Condition
Indoor Side Condition
Outdoor Side Condition
Dry Bulb
Temp °C(℉)
Wet Bulb
Temp °C(℉)
Dry Bulb
Temp °C(℉)
Wet Bulb
Temp °C(℉)
Rated Cooling
26.7(80.0)
19.4(67.0)
35(95.0)
23.9(75.0)
Rated Heating
21.1(70.0)
15.6(60.0)
8.3(47.0)
6.1(43.0)
2
Multi Variable Air Conditioners Ducted Type Indoor Unit
3 Preparations for Installation
Note!
Product graphics are only for reference. Please refer to actual products. Unspecified measure
unit is mm/in.
3.1 Standard Fittings
Please use the supplied standard fittings listed below as instructed.
No.
Name
Appearance
Q'ty
Usage
1
Wired Controller
1
To control the indoor unit
2
Drain Hose Assembly
1
To connect with the hard
PVC drain pipe
3
Special Nut
1
To be used for connecting
the refrigerant pipe
4
M10X8 Nut with Washer
4
To be used together with the
hanger bolt for installing the
unit.
5
M10 Nut (M10X8.4 Nut)
4
To be used together with the
hanger bolt for installing the
unit.
6
M10 Washer (Spring Washer
M10X2.6)
4
To be used together with the
hanger bolt for installing the
unit.
7
Insulation
1
To insulate the gas pipe
8
Insulation
1
To insulate the liquid pipe
9
Sponge
2
To insulate the drain pipe
10
Fastener
8
To fasten the sponge
11
paper pattern for installation
1
Locate the drill hole on
ceiling
3.2 Location for Installation
(1) The appliance shall not be installed in the laundry.
(2) The top holder must be strong enough to support unit‟s weight.
(3) Drain pipe can drain water out easily.
(4) There is no obstacle at inlet or outlet. Please ensure good air circulation.
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Multi Variable Air Conditioners Ducted Type Indoor Unit
(5) In order to make sure the space for maintenance, please install the indoor unit
according to the dimension described below.
(6) Keep the unit away from heating source, inflammable gas or smoke.
(7) This is a concealed ceiling type unit.
(8) Indoor unit, outdoor unit, power cord and electric wire should stay at least 1m (39-3/8
in.) from the TV set and radio. Otherwise, these electrical appliances may have
image interference and noise. (Even if the distance is 1m (39-3/8 in.), when there is
strong electric wave, noise may still occur.)
Unit: mm/in.
Fig 3.2.1
(1) The unit shall be installed in accordance with national standards or local regulations.
(2) Only qualified personnel can carry out installation work, please contact with local dealer before installation.
(3) Make sure all the installation work completed before energizing.
3.3 Requirements for Communication Line
Note:
If air conditioner used under strong electronic-magnetic interference circumstance, STP
(shielded twisted pair) communication cable must be adopted.
3.3.1 Select Communication Line for Indoor Unit and Wired Controller
Fig 3.3.1
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Multi Variable Air Conditioners Ducted Type Indoor Unit
Material type
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
Total length of
communication
line between
indoor unit and
wired controller L
(m/ft.)
L≤250m
(L≤820-1/5ft.)
Wire size
(mm2/AWG)
Material
Standard
2×0.75~2×1.25
(2×AWG18~2×A
WG16)
Remarks
1. Total length of
communication line can't
exceed 250m (820-1/5ft.).
2. The cord shall be Circular
cord (the cores shall be twisted
together).
3. If unit is installed in places
with intense magnetic field or
strong interference, it is
necessary to use shielded wire.
IEC
60227-5
3.3.2 Select Communication Line for Indoor Unit and Outdoor Unit
Fig 3.3.2
Material Type
Light/Ordinary
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
Total Length L
(m/ft.) of
Communication
Cable between
Indoor Unit and
Indoor (Outdoor)
Unit
L≤1000m
(L≤3280-5/6ft.)
Wire size
(mm2/AWG)
≥2×0.75
(≥2×AWG18)
Material
Standard
Remarks
1. If the wire diameter is enlarged to
2×1 mm2 (2×AWG16), the total
communication line length can reach
1500 m (4921-1/4ft.).
2. The cord shall be Circular cord (the
cores shall be twisted together).
3. If unit is installed in places with
intense magnetic field or strong
interference, it is necessary to use
shielded wire.
IEC 60227-5
3.4 Electric Installation
Model
MCA(A)
MOP(A)
GMV-ND07PLS/A-T(U)
1
15
GMV-ND09PLS/A-T(U)
1
15
1
15
1
15
GMV-ND18PLS/A-T(U)
1
15
GMV-ND22PLS/A-T(U)
1
15
GMV-ND12PLS/A-T(U)
GMV-ND14PLS/A-T(U)
Power Supply
208~230V-1ph-60Hz
5
Multi Variable Air Conditioners Ducted Type Indoor Unit
(1) Use copper wire only as unit‟s power cord. Operating temperature should be within its
rated value.
(2) If the power cord is more than 15m (49-1/4 ft.) long, please increase properly the sectional area of power
cord to avoid overload, which may cause accident.
(3) Above selection requirements: Power cord size is based on BV single-core wire (2~4pc) at 40° (104°F)
Ambient temperature when laying across plastic pipe. Air switch is D type and used at 40°C (104°F). If
actual installation condition varies, please lower the capacity appropriately according to the specifications
of power cord and air switch provided by manufacturer.
(4) Install cut-off device near the unit. The minimum distance between each stage of cut-off device should be
3mm (1/8 in.) (The same for both indoor unit and outdoor unit).
4 Installation Instructions
Note!
This series duct type unit is only for one room.
4.1 Installation of Indoor Unit
4.1.1 Outline Dimension and Installation Spots
Equip with an inspection hatch after lifting the unit. For the convenience of maintenance, the
service port should be on one side of the electric box and below unit‟s lower level.
Below are the outline dimension applicable to indoor units of GMV-ND07PLS/A-T(U)~
GMV-ND22PLS/A-T(U).
Fig 4.1.1
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Multi Variable Air Conditioners Ducted Type Indoor Unit
Below are dimensions of A, B, C, etc. for different models:
Model
Unit: mm/in.
A
B
C
D
E
F
G
H
I
742
(29-1/4)
491
(19-3/8)
700
(27-1/2)
615
(24-1/4)
200
(7-7/8)
121
(4-3/4)
528
(20-3/4)
161
(6-3/8)
580
(22-7/8)
942
(37-1/8)
491
(19-3/8)
900
(39-3/8)
615
(24-1/4)
200
(7-7/8)
121
(4-3/4)
728
(28-5/8)
161
(6-3/8)
780
(30-3/4)
1142
(45)
491
(19-3/8)
1100
(43-1/4)
615
(24-1/4)
200
(7-7/8)
121
(4-3/4)
928
(36-1/2)
161
(6-3/8)
980
(38-5/8)
GMV-ND07
PLS/A-T(U)
GMV-ND09
PLS/A-T(U)
GMV-ND12
PLS/A-T(U)
GMV-ND14
PLS/A-T(U)
GMV-ND18
PLS/A-T(U)
GMV-ND22
PLS/A-T(U)
4.1.2 Suspend the indoor unit.2 Suspend the indoor unit
(1) Drill bolt holes and install bolts
1) Stick the reference cardboard on the installation position; drill 4 holes according to the
hole site on the cardboard as shown in fig 4.1.3; diameter of drilling hole is
according to the diameter of expansion bolt and the depth is 60-70mm(2-3/8~2-3/4
in.), as shown in fig 4.1.4.
Fig 4.1.3
Fig 4.1.4
2) Insert the M10 expansion bolt into the hole and then knock the nail into the bolt, as
shown in fig 4.1.5.
Note:
The length of bolt depends on the installation height of the unit, bolts are field supplied.
Fig 4.1.5
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Multi Variable Air Conditioners Ducted Type Indoor Unit
(2) Install the indoor unit temporarily
Assemble suspension bolt on the expansion bolt, attach the hanger bracket to the suspension
bolt. Be sure to fix it securely by using a nut and washer from upper and lower sides of the hanger
bracket. The washer fixing plate will prevent the washer from falling.
(3) The usage of paper pattern
Refer to paper pattern of installation for ceiling opening dimension. The center of ceiling
opening is indicated on the paper pattern. Fix the paper pattern to the unit with 4 screws and fix
the corners of the waterspout at the drainage pipe by screws.
(4) Adjust the unit to the right position.
(5) Check the level of the unit
The indoor unit is equipped with build-in water pump and float switch, verify the levelness of 4
directions by level gauge or vinyl tube (filled with water) respectively.
Fig 4.1.6
(6) Remove the washer locating plate and then tighten the nut on it.
(7) Remove the paper pattern.
Fig 4.1.7
4.2 Refrigerant Pipe Connection
(1) Aim the flaring port of copper pipe at the center of screwed joint and then tighten the
flaring nut with hand as shown in fig 4.2.
(2) Tighten the flaring nut with torque wrench.
8
Multi Variable Air Conditioners Ducted Type Indoor Unit
Fig.4.2.1
(3) Use pipe bend when bending the pipe and the bending angle should not be too
small.
(4) Wrap the connection pipe and joint with sponge and then tie them firmly with tape.
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drain Pipe
(1) The drainage pipe should be short and the gradient downwards should be at least
1%~2% in order to drain condensation water smoothly.
(2) The diameter of drainage hose should be bigger or equal to the diameter of drainage
pipe joint.
(3) Install drainage pipe according to the following fig and arrange insulation to the
drainage pipe. Improper installation may lead to water leakage and damp the
furniture and other things in the room.
(4) You can buy normal hard PVC pipe used as the drainage pipe. During connection,
insert the end of PVC pipe into the drainage hole and then tighten it with drainage
hole and wire binder. Can„t connect the drainage hole and drainage hole with glue.
(5) When the drainage pipelines are used for several units, the position of pipeline
should be about 100mm (4 in.) lower than the drainage port of each unit. In this case,
thicker pipes should be applied.
Fig 4.3.1
4.3.2 Drainage pipe installation
(1) Insert the drain hose into the drain hole and tighten it with tapes, as shown in Fig
4.3.2.
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Multi Variable Air Conditioners Ducted Type Indoor Unit
(2) Tighten the pipe clamp, with the distance between screw nut and hose smaller than
4mm (3/16 in.).
① metal clamp(accessory)
② drain hose(accessory)
Fig 4.3.2
(3) Use sealing plate to make the pipe clamp and hose insulated, as shown in Fig.4.3.3.
① metal clamp(accessory)
② thermal sponge(accessory)
Fig 4.3.3
(4) When connecting several drain pipes, follow the instruction as indicated in Fig 4.3.4.
Choose the drain collecting pipe that matches with unit capacity.
Fig 4.3.4
(5) Install the trap as shown in following Fig 4.3.5.
(6) Install one trap for each unit.
(7) Convenience for cleaning trap in the future should be considered when installing it.
Fig 4.3.5
(8) The horizontal pipe can be connected to vertical pipe in the same level; please select
the connection way as shown in following fig.
NO1: Connection of drainage pipe joints (Fig4.3.6)
NO2: Connection of downspout elbow (Fig4.3.7)
NO3: Inserting pipe connection (Fig4.3.8)
10
Multi Variable Air Conditioners Ducted Type Indoor Unit
Fig 4.3.6
Fig 4.3.7
Fig4.3.8
(9) The installation height of raising pipe for drainage should be lower than B. The
gradient from raising pipe towards drainage direction should be at least 1%~2%. If
the raising pipe is vertical with the unit, the raising height should be less than C.
Fig 4.3.9
Model
A (mm/in.)
B (mm/in.)
C (mm/in.)
GMV-ND07PLS/A-T(U)
GMV-ND09PLS/A-T(U)
GMV-ND12PLS/A-T(U)
GMV-ND14PLS/A-T(U)
GMV-ND18PLS/A-T(U)
GMV-ND22PLS/A-T(U)
155(6-1/8)
845(33-1/4)
795(31-5/16)
(10) Drain pipes should have a downward slope of at least 1%~2%, in order to prevent
pipes from sagging, install hanger bracket at intervals of 1000~1500mm (39-3/8~59
in.).
Fig 4.3.10
4.3.3 Test of Drainage System
(1) Please test drainage system after electric work is finished.
Inject approximately 1L purified water to drain pan from air vent, ensure that not to splash the
water over the electrical components (e.g. water pump. etc.).
11
Multi Variable Air Conditioners Ducted Type Indoor Unit
1) In case of commissioning finished, please energize the IDUs and switch to cooling
or dry mode, meanwhile, the water pump operates, you can check the draining
through the transparent part of drain socket.
2) If communication wire is not connected, communication malfunction “C0” will occur
after 60s of energizing. In this case, the water pump operates automatically. Check
if the water pump drains normally drains normally through drainage port. The water
pump will stop automatically after running for 10min.
(2) During the test, please carefully check the drainage joint, make sure no any leakage
occur.
(3) It is strongly recommend to do the drain test before ceiling decoration.
Fig 4.3.11
4.4 Installation of Air Duct
Note:
① There should be insulating layer on air-out duct, air-return duct and fresh air duct to
avoid heat loss and moisture. Adhere a nail on the air duct and then add thermal
sponge with a layer of tin. Fasten it with a nail cover and then seal the junction with
tin tapes.You can also use other materials that have good insulation quality.
② Each air-out duct and air-return duct should be fixed on a pre-made board with iron
frame. The junction of air duct should be well-sealed in order to prevent air
leakage.
③ The design and construction of air duct should comply with national requirements.
④ The edge of air-return duct is suggested to be more than 150mm(5-7/8 in.) away
from the wall. Add a filter to the air-return opening.
⑤ Please consider noise-damping and vibration damping for the design and
construction of air duct. Besides, noise source must be away from people. For
instance, do not have the air-return opening installed on top of the user(offices,
rest area, etc.).
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Multi Variable Air Conditioners Ducted Type Indoor Unit
4.4.1 Installation of Air-out Duct
(1) Installation of the Rectangular Duct
Fig 4.4.1
No.
Name
No.
Name
1
Hanger Rod
5
Static Pressure Box
2
Return Air Duct
6
Filter Screen
3
Canvas Duct
7
Main Supply Air Duct
4
Return Air Inlet
8
Supply Air Outlet
(2) Installation of Circular Duct
Fig 4.4.2
No.
Name
No.
Name
1
Return Air Duct
6
Transition Pipe
2
Canvas Duct
7
Supply Air Duct
3
Return Air Blinds
8
Diffuser
4
Hanger Rod
9
Diffuser Connector
5
Supply Air Outlet
4.4.2 Shape and Size of Air Outlet and Air-return Opening
Range of Capacity GMV-ND07PLS/A-T(U)~GMV-ND22PLS/A-T(U).
Fig 4.4.3 Air Outlet
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Multi Variable Air Conditioners Ducted Type Indoor Unit
Fig 4.4.4 Air-return Opening
Model
Size of Air Outlet
Size of Air-return Opening
A(mm/in.)
B(mm/in.)
C(mm/in.)
D(mm/in.)
121(4-3/4)
528(20-3/4)
580(22-7/8)
161(6-3/8)
121(4-3/4)
728(28-5/8)
780(30-3/4)
161(6-3/8)
121(4-3/4)
928(36-1/2)
980(38-5/8)
161(6-3/8)
GMV-ND07PLS/A-T(U)
GMV-ND09PLS/A-T(U)
GMV-ND12PLS/A-T(U)
GMV-ND14PLS/A-T(U)
GMV-ND18PLS/A-T(U)
GMV-ND22PLS/A-T(U)
4.4.3 Installation of the Return Air Duct
(1) The default installation location of the rectangular flange is at the back and the return
air cover plate is at the bottom, as shown in Fig 4.4.7.
Fig 4.4.7
(2) If the bottom return air is desired, just change the place of the rectangular flange and
the return air cover plate.
(3) Connect one end of the return air duct to the return air outlet of the unit by rivets and
the other to the return air louver. For the sake of the convenience to freely adjust the
height, a cutting of canvas duct will be helpful, which can be reinforced and folded by
8# iron wire.
(4) More noise is likely to be produced in the bottom return air mode than the rear return
air mode, so it is suggestive to install a silencer and a static pressure box to minimize
the noise.
(5) The installation method can be choosen with considering the conditions of the
building and maintenance etc., as shown in Fig 4.4.8.
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Multi Variable Air Conditioners Ducted Type Indoor Unit
Fig 4.4.8
Table 5 Installation of the return air duct
No.
Name
No.
Name
1
Return Air Inlet (with filter)
4
Indoor unit
2
Canvas Duct
5
Supply Air Duct
3
Return Air Duct
6
Grille
4.5 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
NOTICE! When installation is finished, the unit must be tested and debugged before
operation. Please refer to Instruction Manual of ODU for auto addressing and debugging details.
5 Wiring Work
WARNING
Before obtaining access to terminals, all supply circuits must be disconnected.
(1) Units must be earthed securely, or it may cause electric shock.
(2) Please carefully read the wiring diagram before carry out the wiring work, incorrect wiring could cause
malfunction or even damage the unit.
(3) The unit should be powered by independent circuit and specific socket.
(4) The wiring should be in accordance with related regulations in order to ensure the units reliable running.
(5) Install circuit breaker for branch circuit according to related regulations and electrical standards.
(6) Keep cable away from refrigerant pipings, compressor and fan motor.
(7) The communication wires should be separated from power cord and connection wire between indoor unit
and outdoor unit.
(8) Adjust the static pressure via wired controller according to site circumstance.
5.1 Connection of Wire and Patch Board Terminal
(1) The connection of wire (as shown in fig 5.1.1)
1) Strip about 25mm (1 in.) insulation of the wire end by stripping and cutting tool.
2) Remove the wiring screws on the terminal board.
15
Multi Variable Air Conditioners Ducted Type Indoor Unit
3) Shape the tail of wire into ring by needle nose plier, and keep the gauge of ring in
accordance with screw.
4) Use the screwdriver for tightening the terminal.
(2) The connection of stranded wire (as shown in fig 5.1.2)
1) Strip about 10mm (3/8 in.) insulation of the end of stranded wire by stripping and
cutting tool.
2) Loosen the wiring screws on terminal board.
3) Insert the wire into the ring tongue terminal and tighten by crimping tool.
4) Use the screwdriver for tightening the terminal.
Fig 5.1.1
Fig 5.1.2
5.2 Power Cord Connection
NOTICE! Every unit should be equipped with a circuit breaker for short-circuit and overload
protection. During operation, all indoor units connected to the same outdoor unit system must be
kept energized status. Otherwise, the unit can‟t operate normally.
Fig 5.2
 For units with single-phase power supply.
(1) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect the power cord to terminal "L1, L2,
"
(4) Fix the power card with wiring clamp.
(5) The wire diameter of power cord can‟t be less than 18AWG.
16
Multi Variable Air Conditioners Ducted Type Indoor Unit
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit (or indoor unit)
(1) Detach the electric box lid.
(2) Let the Communication cable pass through the wiring through-holes.
(3) Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board,
as shown in fig5.3.1.
Fig 5.3.1
Fig 5.3.2
(4) Fix the communication cable with clamp of electric box.
(5) For more reliable communication, make sure connect the terminal resistor to the
most downstream IDU of the communication bus (terminal D1 and D2), as shown in
fig 5.3.2, terminal resistor is provided with each ODU.
5.4 Connect Communication Wire of Wired Controller
(1) Open electric box cover of indoor unit.
(2) Let the communication wire go through the rubber ring.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
(4) Fix the communication wire with wire clip on the electric box.
(5) Wiring instructions of remote receiving light board and wired controller:
1) Fig 5.4.1 shows the installation of wired controller.
Fig 5.4.1
Fig 5.4.2
2) Fig 5.4.2 shows the installation of remote controller.
3) Wired controller and receiving light board can be installed at the same time. When
operating through a remote controller, both wired controller and the receiving light
board can receive the signals, as shown in Fig 5.4.3.
17
Multi Variable Air Conditioners Ducted Type Indoor Unit
Fig 5.4.3
5.5 Illuminate for Connection of Wired Controller and Indoor Units
Network
(1) Communication wire of indoor unit and outdoor unit (or indoor unit) is connected to
D1, D2.
(2) Wired controller is connected to H1, H2.
(3) One indoor unit can connect two wired controllers that must be set as master one
and slave one.
(4) One wired controller can control 16 indoor unitS in maximum at the same time. (as
shown in fig 5.5.1)
(1) The type of indoor units must be the same if they are controlled by the same wired controller.
(2) When the indoor unit is controlled by two wired controllers, the addresses of the two wired controllers
should be different through address setting. Address 1 is for main controller; Address 2 is for slave
controller. Detailed setting please refer to the instruction manual of wired controller.
18
Multi Variable Air Conditioners Ducted Type Indoor Unit
Fig 5.5.1
19
Multi Variable Air Conditioners Ducted Type Indoor Unit
6 Routine Maintenance
(1) Do turn off the unit and cut off the main power supply when cleaning the air conditioner to avoid electric
shock or injury.
(2) Stand at solid table when cleaning the unit.
(3) Do not clean the unit with hot water whose temperature is higher than 45°C to prevent fade or deformation.
(4) Do not dry the filters by fire, or it may catch fire or become deformed.
(5) Clean the filter with a wet cloth dipped in neutral detergent.
(6) Please contact after-sales service staff if there is abnormal situation.
6.1 Cleaning of Filter
(1) Remove the filters from inlet of IDU. Use a vacuum cleaner to remove dust. If the
filters are dirty, wash them with warm water and mild detergent, and dry the filters in
the shade.
(2) If the unit used in the environment with much dust, please clean it regularly. (usually
once every two weeks).
6.2 Maintenance before the Seasonal Use
(1) Check if the air inlet and air outlet of indoor and outdoor unit are blocked.
(2) Check if securely grounded.
(3) Check if all the power cord and communication cable are securely connected.
(4) Check if any error code displayed after energized.
6.3 Maintenance after the Seasonal Use
(1) Set the unit in fan mode for half a day in a sunny day to dry the inner part of unit;
(2) When the unit won‟t be used for a long time, please cut off power supply for energy
saving; the characters on the wired controller screen will disappear after cutting off
the power supply.
20
Multi Variable Air Conditioners Ducted Type Indoor Unit
7 Table of Error Codes for Indoor Unit
Error
Code
Content
Error
Code
Error
Code
Content
Content
L0
Indoor Unit Error
LA
Indoor Units
Incompatibility Error
d9
Jumper Cap Error
L1
Indoor Fan Protection
LH
Low Air Quality Warning
dA
Indoor Unit Network
Address Error
L2
E-heater Protection
LC
ODU-IDU Incompatibility
Error
dH
Wired Controller PCB
Error
L3
Water Full Protection
d1
Indoor Unit PCB Error
dC
Capacity DIP Switch
Setting Error.
L4
Wired Controller Power
Supply Error
d3
Ambient Temperature
Sensor Error
dL
Outlet Air Temperature
Sensor Error
L5
Freeze protection
d4
Inlet Pipe Temperature
Sensor Error
dE
Indoor Unit CO2 Sensor
Error
L7
No Master Indoor Unit
Error
d6
Outlet Pipe Temperature
Sensor Error
dy
Water Temperature
Sensor Error
d7
Humidity Sensor Error
C0
Communication Error
d8
Water Temperature
Error
AJ
Filter Cleaning Reminder
L8
L9
db
Power Insufficiency
Protection
Quantity Of Group
Control Indoor Units
Setting Error
Special Code: Field Debugging Code
8 Troubleshooting
The air conditioner is not expected to be serviced by users. Incorrect repair may cause
electric shock or fire, so please contact an authorized service center for professional service. The
following checks prior to contact may save your time and money.
Phenomenon
The unit can’t start
Troubleshooting
①
②
③
④
The unit stops after running for a
while.
Power supply is not connected.
Circuit breaker tripping caused by leakage of electricity.
Input voltage is too low.
Defect of main PC-board.
The inlet or outlet of ODU or IDU are blocked by obstacle.
Poor cooling effect
①
②
③
④
⑤
⑥
The filter is dirty.
Too heavy heat load of room(e.g. too many people)
Door or windows is open.
Inlet and outlet of IDU are blocked.
Setting temperature is too high.
Refrigerant is insufficient (e.g. refrigerant leakage)
Poor heating effect
①
②
③
④
The filter is dirty.
Door or window is open.
Setting temperature is too low.
Refrigerant is insufficient (e.g. refrigerant leakage)
Indoor fan doesn’t start
up during heating
① At starting, the IDU fan could not operate till the heat exchange
become hot, for preventing delivering the cool air.
② At defrosting, the IDU fan stopped due to system switch to cooling
mode. For preventing delivering the cool air, and resume operating
after defrosting.
Note: If air conditioner still fails to work normally after checking and handling as described
above, please stop using it immediately and contact local service center for assistance.
21
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