Multi Variable Air Conditioners Cassette Type Indoor Unit

Multi Variable Air Conditioners Cassette Type Indoor Unit
Multi Variable Air Conditioners
Cassette Type Indoor Unit
Owner's Manual
Air Conditioners
Models:
GMV-ND07T/A-T(U)
GMV-ND09T/A-T(U)
GMV-ND12T/A-T(U)
GMV-ND15T/A-T(U)
GMV-ND18T/A-T(U)
GMV-ND24T/A-T(U)
GMV-ND30T/A-T(U)
GMV-ND36T/A-T(U)
GMV-ND42T/A-T(U)
GMV-ND48T/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:
WARNING
CAUTION
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.
This mark indicates procedures which, if improperly performed, might lead to the death or
serious injury of the user.
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 code,ex-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) Installation must be performed in accordance with the requirements of NEC and CEC by authorized personnel only.
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 Installation Position Selection ............................................................................................. 4
3.3 Requirements for Communication Line .............................................................................. 5
3.4 Wiring Requirements........................................................................................................... 6
4 Installation Instructions ....................................................................................................... 7
4.1 Installation of Indoor Unit .................................................................................................... 7
4.2 Refrigerant Pipe Connection ............................................................................................... 9
4.3 Drainage Pipe Installation and Drainage System Testing ................................................ 10
4.4 Panel Installation ............................................................................................................... 13
4.5 Installation of Wired Controller .......................................................................................... 14
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)
................................................................................................................................................. 16
5.4 Connect Communication Wire of Wired Controller ........................................................... 17
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network ........................ 18
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 Cassette 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 nitrigen charge requirements.Charge nitrogen when welding pipes.
(5) Never short-circiut 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 ACPRO 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..
(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 immerdiately contact ACPRO 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 ACPRO.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
2 Product Introduction
2.1 Names of Key Components
No.
①
②
③
④
⑤
⑥
Name
Air Outlet
Filter
Air Inlet Grile
Fittings
Louver
Drainage Pipe
2.2 Rated Working Condition
Indoor Side Condition
Dry Bulb Temp °C(℉)
Outdoor Side Condition
Wet Bulb Temp °C(℉) Dry Bulb Temp℃(℉) Wet Bulb Temp℃(℉)
Rated Cooling
26.7(80.0)
19.4(67.0)
35(95)
24(75.2)
Rated Heating
21.1(70.0)
15.6(60.0)
7(44.6)
6(42.8)
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Multi Variable Air Conditioners Cassette Type Indoor Unit
3 Preparations for Installation
Notice: 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
wireless controller
1
To control the indoor unit
2
paper pattern for
installation
1
Locate the drill hole on ceiling
3
Tapping screw with
washer
4
Fix paper pattern
4
Washer fixing plate
4
Prevent the washer from falling
off
5
Drain Hose Assembly
1
To connect with the hard PVC
drain pipe
6
Special Nut
1
To connect gas pipe
7
Special Nut
1
To connect liquid pipe
8
M10 Washer (Spring
Washer M10X2.6)
4
To be used together with the
hanger bolt for installing the unit.
9
Insulation
1
To insulate the gas pipe
10
Insulation
1
To insulate the liquid pipe
11
Sponge
1
To insulate the drain pipe
12
Fastener
4
To fasten the sponge
3
Multi Variable Air Conditioners Cassette Type Indoor Unit
3.2 Installation Position Selection
(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.
(5) In order to make sure the space for maintenance, please install the indoor unit according
to the dimension described below.
(6) This indoor unit may be installed on ceilings up to 3.5 m(137-3/4in.) in height (for 30~48k
units:4.0m(157-1/2in.)). Install then unit higher than 2.5 m(98-3/8in.)to avoid accidental
touching.
(7) Keep the unit away from heating source, inflammable gas or smoke.
(8) This is a concealed ceiling type unit.
(9) 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) 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.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
3.3 Requirements for Communication Line
Notice:
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
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.)
Wire size
(mm2/AWG)
L≤250m
(L≤820ft.)
2×0.75~2×1.25
(2×AWG18~2×AW
G16)
Material
Standard
Remarks
IEC
60227-5
1. Total length of communication
line can't exceed 250m (820ft.).
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.
3.3.2 Selection of Communication Wire between Indoor Unit and Indoor Unit (or
Outdoor Unit)
Fig 3.3.2
Total Length L (m/ft.)
of Communication
Cable between
Material Type
Indoor Unit and
Indoor (Outdoor)
Unit
Light/Ordinary
polyvinyl
chloride
sheathed
cord. (60227
IEC 52
/60227 IEC
53)
L≤1000m
(L≤3280ft.)
Wire size
(mm2/AWG)
≥2×0.75
(≥2×AWG18)
Material
Standard
Remarks
IEC 60227-5
1. If the wire diameter is enlarged to 2×1
mm2 (2×AWG16), the total
communication line length can reach
1500 m (4920ft.).
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.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
3.4 Wiring Requirements
Power Cord Size and Air Switch Capacity
MCA(A)
MOP(A)
GMV-ND07T/A-T(U)
1
15
GMV-ND09T/A-T(U)
1
15
GMV-ND12T/A-T(U)
1
15
GMV-ND15T/A-T(U)
1
15
1
15
1
15
GMV-ND30T/A-T(U)
1
15
GMV-ND32T/A-T(U)
1
15
GMV-ND42T/A-T(U)
1
15
GMV-ND48T/A-T(U)
1
15
Model
GMV-ND18T/A-T(U)
GMV-ND24T/A-T(U)
Power Supply
208~230V-1ph-60Hz
(1) An all-pole disconnection switch having a contact separation of at least 3mm(1/8 in.) in all
poles should be connected in fixed wiring.
(2) The circuit breaker and power cord specification in above sheet is based on max power(max
current) of the unit.
(3) The power cord specification in above sheet is based on ambient temperature of 40(104°F).
(4) The circuit breaker specification in above sheet is based on ambient temperature of
40(104°F). If the working condition is different, please adjust it according to the specification
sheet of circuit breaker.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
4 Installation Instructions
4.1 Installation of Indoor Unit
4.1.1Ceiling opening Dimension and suspension bolt position.
Fig 4.1.1
Unit: mm(in.)
Model
A
B
C
D
E
07~48
950(37-3/8)
890(35-1/16)
840(33-1/16)
680(26-3/4)
780(30-11/16)
4.1.2 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 4.1.2; 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 4.1.3.
Fig 4.1.2
Fig 4.1.3
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Multi Variable Air Conditioners Cassette Type Indoor Unit
2) Insert the M10 expansion bolt into the hole and then knock the nail into the bolt, as
shown in fig 4.1.4.
Notice:
The length of bolt depends on the installation height of the unit, bolts are field supplied.
Fig 4.1.4
(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.
(6) Remove the washer locating plate and then tighten the nut on it.
(7) Remove the paper pattern.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
Fig 4.1.5
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.
Pipe diameter
Torque(N•m)
mm(in.)
6.35(1/4)
15~30
9.52(3/8)
35~40
12.7(1/2)
45~50
15.9/(5/8)
60~65
Fig.4.2
(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.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
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) Drainage pipe should have the same diameter or larger diameter than the connecting
pipes (PVC pipe, outside diameter 25mm(1 in.), thickness≥1.5mm(1/16 in.) )
(2) Keep drainage pipe short and sloping downwards at a gradient of at least 1% for
preventing forming air bubbles.
(3) If the gradient of drainage pipe could not meet the installation requirements, rasing pipe
should be applied.
(4) Insert the drainage hose into drain socket, tighten the metal clamp securely.
(5) Warp the sealing pad over drain hose and metal clamp for heat insulation.
(6) Make sure to perform insulation work for all drainage piping in order to prevent any
possible water drop due to dew condensation.
(7) Apply the suitable diameter for converging drainage pipe according to the operating
capacity of the unit.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
Fig 4.3.2
①- drainage pipes assembled by T-shaped joints
(8) 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 vetical with the unit, the raising height should be less than C.
Fig 4.3.3
Model
A (mm/in.)
B(mm/in.)
C(mm/in.)
07
170(6-3/4)
830(32-5/8)
780(30-3/4)
09~48
220(8-5/8)
780(30-3/4)
730(28-3/4)
(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 4.3.4
(11) During the installation, distance from soft drain pipe to the gasket is C mm when the bolt
is tightened. It is not allowed to apply PVC or other related glue in the joints of two ends
of drain pipe.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
Fig 4.3.5
Model
C (mm/in.)
07
8~12(5/16~1/2)
09~48
12~18(1/2~11/16)
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).
1) 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).
2) 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 drain socket.
3) 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 through drainage port. The water pump will stop
automatically after running for 10mins.
(2) During the test, please carefully check the drainage joint, make sure no any leakage
occur.
(3) It’s strongly recommend to do the drain test before ceiling decoration.
Fig 4.3.6
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Multi Variable Air Conditioners Cassette Type Indoor Unit
4.4 Panel Installation
4.4.1 Notices for Installation
(1) Improper decorative panel installation could cause the following problems.
Fig 4.4.1
(2) Ensure that its clearance-free between decoration panel and ceiling board after installation,
if not, please adjust the body position.
Fig 4.4.2
(3) Connect the decoration panel terminals (Female) to body terminals (male) as shown in
figure 4.4.3.
Fig 4.4.3
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Multi Variable Air Conditioners Cassette Type Indoor Unit
4.4.2 Panel Installation
(1) Detach the panel’s Corner Cap, there is a mark “piping side” on one of the 4 corners,
adjust the panel direction so as to keep the mark and fittings on the same corner .
(2) Temporality hang the panel to body (there is four hangers on each corner of the panel,
hang the hangers to corresponding hooks on the body), as shown in fig 4.4.4.
(3) Detach the air inlet grille from panel, make a wiring connection of signal receiver. Notices
that the connection wire not stuck in the middle of body and panel, or may cause air
leakage and lead to condensation water drop.
(4) Tighten 4 screws at each corner of panel respectively, fix the panel on the body firmly.
(5) After tightening screws, reinstall the air inlet grille.
Fig 4.4.4.
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.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
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
(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.
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
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Multi Variable Air Conditioners Cassette Type Indoor Unit
5.2 Power Cord Connection
NOTICE!
Every unit should be equipped with a circuit breaker for short-circuit and overload
protection. In general, circuit breaker is at OFF status.
During operation, all indoor units and outdoor units belonging to the same 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.
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,
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Multi Variable Air Conditioners Cassette Type Indoor Unit
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) Wired controller (standard) is shown as Fig.5.4.1,wireless controller (optional) is shown
as Fig.5.4.2,signal receiver is provided with panel as standard accessory.
Fig 5.4.1
Fig 5.4.2
2) Both IDU and wired controller are equipped with signal receiver, and available for
wireless control respectively.
Fig 5.4.3
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Multi Variable Air Conditioners Cassette Type Indoor Unit
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 fig5.5)
(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.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
Fig 5.5
19
Multi Variable Air Conditioners Cassette 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 Cassette Type Indoor Unit
7 Table of Error Codes for Indoor Unit
Error
Code
Error
Code
Content
Content
Error
Code
L0
Indoor Unit Error
LA
Indoor Units
Incompatibility Error
L1
Indoor Fan Protection
LH
Low Air Quality Warning
dA
L2
E-heater Protection
LC
ODU-IDU Incompatibility
Error
dH
L3
Water Full Protection
d1
Indoor Unit PCB Error
dC
L4
Wired Controller Power
Supply Error
d3
L5
Freeze protection
d4
No Master Indoor Unit
Error
Power Insufficiency
Protection
Quantity Of Group
Control Indoor Units
Setting Error
L7
L8
L9
db
d9
Content
Jumper Cap Error
Indoor Unit Network
Address Error
Wired Controller PCB
Error
Capacity DIP Switch
Setting Error.
Outlet Air Temperature
Sensor Error
Indoor Unit CO2 Sensor
Error
Water Temperature
Sensor Error
Ambient Temperature
Sensor Error
Inlet Pipe Temperature
Sensor Error
Outlet Pipe Temperature
Sensor Error
dE
d7
Humidity Sensor Error
C0
Communication Error
d8
Water Temperature Error
AJ
Filter Cleaning Reminder
d6
dL
dy
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
The unit stops after running
for a while.
Troubleshooting
① Power supply is not connected.
② Circuit breaker tripping caused by leakage of electricity.
③ Input voltage is too low.
④ Defect of main PC-board.
① The inlet or outlet of ODU or IDU are blocked by obstacle.
Poor cooling effect
① The filter is dirty.
② Too heavy heat load of room(e.g. too many people)
③ Door or windows is open.
④ Inlet and outlet of IDU are blocked.
⑤ Setting temperature is too high.
⑥ Refrigerant is insufficient (e.g. refrigerant leakage)
Poor heating effect
① The filter is dirty.
② Door or window is open.
③ Setting temperature is too low.
④ 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.
Notice:
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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Tel: E -mail: ZZZDFSURFRP
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