Providing indoor climate comfort
DUCTAIR™ II
DUCTAIR II-IOM-0808-E
Installation, operating
and maintenance
DUCTAIR II - 0808-E • 1 •
INSTALLATION - OPERATION - MAINTENANCE
MANUAL
Ref : DUCTAIR II-IOM-0808-E
INSTALLATION
Installation information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Remote controller & its frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Caution on remote controller installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation place . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
The indoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
The outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Indoor unit installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Install the main body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Panel installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Outdoor unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
COMMISSIONING
Install the connecting pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Expel the air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Vacuum dry and leakage checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Check the leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Connect the drain pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Water drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Insulation work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
The outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Test operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
SELF-DIAGNOSIS AND TROUBLESHOOTING
Indoor unit’s LED indication of trouble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
LED’s for the indication of outdoor trouble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Clean . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Troubles and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Troubles and solutions concerning the remote controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Appendix 1: Indoor temperature and pipe temperature sensor resistance value table . . . . . . . . . . . . .29
Lennox have been providing environmental solutions since 1895, our range of DUCTAIR
TM
II continues to meet the standards
that have made LENNOX a household name. Flexible design solutions to meet YOUR needs and uncompromising attention
to detail. Engineered to last, simple to maintain and Quality that comes as standard. Information on local contacts at www.
lennoxeurope.com.
All the technical and technological information contained in this manual, including any drawing and technical descriptions
provided by us, remain the property of Lennox and must not be utilised (except in the operation of this product), reproduced,
issued to or made available to third parties without the prior written agreement of Lennox.
The specications and technical characteristics in this booklet are given for information purposes. The manufacturer reserves the right to modify them without
prior notice or obligation to modify in a similar manner, the equipments previously supplied.
CONTENTS
1
2
3
• 2 • DUCTAIR II - 0808-E
INSTALLATION INFORMATION
To install properly, please read this manual at rst.
The air conditioner must be installed by qualied persons.
When installing the indoor unit or its tubing, please follow this manual as strictly as possible.
When all the installation work is nished, please turn on the power only after a thorough check.
No further announcement if there is any change of this manual caused by product improvement.
The appliance shall be installed in accordance with national wiring regulations.
The temperature of refrigerant circuit will be high, please keep the interconnection cable away from the copper tube.
Note: The installor should illustrate to users how to correctly use and maintain the air-conditioner, as well as remind users to
carefully read and keep both Installation Manual and Owner’s Manual well.
ACCESSORIES
Name of Accessories Q’ty Qutline Usage
Owner’s manual 1 - -
Installation manual 1 (This manual) -
Pipe insulating material 2 (Heat resisting)
Drain elbow 1 To connect drain
Seal 1 To connect drain
Signal receiver display board 1 Receive Signal
REMOTE CONTROLLER & ITS FRAME
1. Remote controller 1
2. Frame
1
3. Mounting screw (BST2.9x10-C-H)
2
4. Alkaline dry batteries (AM4)
2
5. Remote controller manual
1
CAUTION ON REMOTE CONTROLLER INSTALLATION
Never throw or beat the controller.
Before installation, operate the remote controller to determine its location in a reception range.
Keep the remote controller at least 1m apart from the nearest TV set or stereo equipment. (It is necessary to prevent image
disturbances or noise interferences.)
Do not install the remote controller in a place exposed to direct sunlight or close to a heating source, such as a stove.
Note that the positive and negative poles are in right positions when loading batteries.
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INSTALLATION
Remote
controller
Mouting screw BST2.9x10-C-H
Remote
controller
holder
DUCTAIR II - 0808-E • 3 •
INSTALLATION
INSTALLATION PLACE
THE INDOOR UNIT
There is enough room for installation and maintenance.
The ceiling is horizontal, and its structure can endure the weight of the indoor unit.
The air outlet and the air inlet are not impeded, and the inuence of external air is the least.
The air ow can reach throughout the room.
The appliance must be installed 2,3m above oor.
The connecting pipe and drainpipe could be extracted out easily.
There is no direct radiation from heaters.
THE OUTDOOR UNIT
There is enough room for installation and maintenance.
The air outlet and the air inlet are not impeded, and can not be reached by strong wind.
The place is dry and ventilative.
The support is at and horizontal and can stand the weight of the outdoor unit. And no additional noise or vibration.
Your neighborhood will not feel uncomfortable with the noise or expelled air.
There is no leakage of combustible gas.
It is easy to install the connecting pipe or cables.
CAUTION
Location in the following places may cause malfunction of the machine. (If unavoidable, please consult your local dealer.)
There exists petrolatum.
There is salty air surrounding(near the coast).
There is caustic gas(the sulde, for example) existing in the air (near a hot spring).
The Volt vibrates violently(in the factories).
In buses or cabinets.
In kitchen where it is full of oil gas.
There is strong electromagnetic wave existing.
There are inammable materials or gas.
There is acid or alkaline liquid evaporating.
The appliance shall not be installed in the laundry.
Other special conditions.
NOTES BEFORE INSTALLATION
Select the correct carry-in path.
Move this unit as originally packaged as possible.
If the air conditioner is installed on a metal part of the building, it must be electrically
insulated according to the relevant standards to electrical appliances.
NOTE - REMARK PER EMC DIRECTIVE 89/336/EEC
To prevent icker impressions during the start of the compressor (technical process), following installation conditions apply:
The power connection for the air conditioner has to be done at the main power distribution. The distribution has to be of a low
impedance, normally the required impedance reaches at a 32A fusing point.
No other equipment has to be connected with this power line.
For detailed installation acceptance, please refer to your contract with the power supplier if restrictions do apply for products like
washing machines, air conditioners or electrical ovens.
For power details of the air conditioner, refer to the rating plate of the product.
For any question contact your local dealer.
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• 4 • DUCTAIR II - 0808-E
INDOOR UNIT INSTALLATION
INSTALL THE MAIN BODY
Installing Ø10 hanging screw bolts. (4 bolts)
Please refer to the following gure for the distance measurement between the screw bolts.
Please install with f10 hanging screw bolts.
The handling to the ceiling varies from the constructions, consult the construction personnels for the specic procedures.
The size of the ceiling to be handled. Do keep the ceiling at. Consolidate the roof beam for possible vibration.
Cut off the roof beam.
Strengthen the place cut off, and consolidate the roof beam.
Carry out the pipe and line operation in the ceiling after nishing the installation of the main body. While choosing where to start
the operation, determine the direction of the pipes to be drawn out. Especially in case there is a ceiling, position the refrigerant
pipes, drain pipes, indoor & outdoor lines to the connection places before hanging up the machine.
The installation of hanging screw bolts.
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1.
2.
3.
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INSTALLATION
Wooden construction New concrete bricks
Put the square timber traversely over the roof beam, then
install the hanging screw bolts. (Refer to Chart 1)
Inlaying or embedding the screw bolts.(Refer to Chart 2)
Timber over the beam
Roof beam
Ceiling
Hanging screw bolts
Chart 1 Chart 2
Blade shape insertion
Slide insertion
For original concrete bricks Steel roof beam structure
Use embedding screw bold, crock and stick harness. (Refer
to Chart 3)
Install and use directly the supporting angle steel. (Refer to
chart 4)
Steel bar
Embedding screw bolt
Chart 3 Chart 4
Hanging screw bolt
Supporting
angle steel
(Pipe hanging and embedding screw bolt)
Hanging bolts
Overhanging the indoor unit
Overhang the indoor unit onto the hanging screw bolts with
block.
Position the indoor unit in a at level by using the level
indicator, unless it may cause leakage.
1.
2.
Screw nut
Washer
Hanging
screw bolt
Overhang part
Chart 5
50 0m m 1 0 0 m m
2 00 mm
2 5 0 m m
< 3 m
1 0 0 0 m m
50 0mm
210
102
25
7 15
8 70
82
3 80
2 20
1 75
210
63
55
9 15
8 70
268
385
>500mm
>250mm
>500mm
148
100
AÏ
BÏ
Φ100
DUCTAIR II - 0808-E • 5 •
INSTALLATION
Installing the dust proof net and canvas air passage
Install the dust proof net according to the installation manual;
Install the canvas air passage underneath the dust proof net.
Pipe connection
The static pressure in the outside of the unit is 39.2Pa (maximum 98Pa), the length of the air pipe attached is determined by this
parameter.
Size 12 installation location
Enough room for installation and maintenance.
1.
2.
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Air outlet
Refrigerant
pipes
Air return box
Air outlet
Air return box
Air return box
Duct
The ceiling is horizontal and it can afford the weight of the indoor unit.
The air inlet and outlet are not impeded and does not affected by outdoor air too much.
The air ow can reach every part of the room.
The connecting pipe and drainpipe can be easily extracted out.
There is no direct radiation from heat source.
Size 12 The position fo hanging bolts
Enough room for installation and maintenance.
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Air outlet (on side)
Air outlet sketch map
Refrigerant piping joint
(gas side)
Water outlet Ø25
Refrigerant piping joint
(gas side)
Fresh air inlet
Ceiling
250
320
A
P-250xL
I
I
127
A B C D E F G H I J K L M N P
18 1000 1050 1030 1050 1080 12,7
6,4 252 24,4 580 290 293,8 2 3 3
24 - 30 1000 1050 1030 1050 1080 15,9 9,5 252 24,4 580 290 293,8 2 3 3
30 - 60 1350 1400 1380 1400 1430 19,1 12,7 252 35 930 310 293,8 3 4 4
J=mxK
H
C
80
60
70
n-
φ200
150
460-640
5
450
300
300
210
80
φ
125
630
720
30
320
170
70
90
100
210
120
305
335
• 6 • DUCTAIR II - 0808-E
When using a back-air installation, please refer to the following:
Chart 8
Back panel layout
Model
Note:
The dimension of sizes 24 and 36 (3 phases) are the same
The dimension of sizes 30 and 36 (1 phase) are the same
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INSTALLATION
Size 18 to 60: The positioning of ceiling hole and indoor unit and hanging screw bolts
Air outlet
Hanging screw bolt
4-M10 site conguration
Main body: A
Distance between bolts: B
Ceiling hole: D
Panel: E
Chart 6
(Take size 36 as example)
Chart 7
Fixed screw
Main body: 800
Distance between holes: 565
Connecting point of
refrigerant pipes
(Gas side ØF)
Connecting point of
refrigerant pipes
(Liquid side ØG)
Connecting point of drain pipe
Entrances and exits for communication
lines of indoor and outdoor units
Ceiling hole: 470
Panel: 500
Plank (inside)
(for air delivery outside)
Dust proof net
(Additional purchase)
Canvas air passage
(Additional purchase)
Panel
(Additional purchase)
DUCTAIR II - 0808-E • 7 •
INSTALLATION
Outside frame
Chart 9
Buckle
Inside frame Knob
Main body
Canvas air passage
Waist-shaped hole
xed board
Outside frame
Ceiling
Chart 10
Chart 11
Air passage
Outside
frame
Gallus
Hook
PANEL INSTALLATION
Unload inner frame: Slide the knob, release the buckle from the outside frame hole, then unload the inner frame (Chart 9)
Hang the outside frame on the main body with face down. (4 places at 4 corners): Hang the belt on the hook of the main body.
(Charts 10 & 11)
Note: The signal wire of the remote control receiver must be drawn out through the canvas air passage.
Fix the outside frame and the canvas air passage with screws: screw must be xed on from the bottom to the top (Chart 12)
Hang up the outside frame until it sticks to the ceiling tightly. (Chart 13)
Fix the main body and the outside frame with the x board of waist-shape hole (in two places) (Chart 14):
Hang one side of the x board of the waist-shaped hole on the hook of the main body.
Tighten the other side of the board with screw to the outside frame.
Cut off the surplus part of the board with pliers.
Bend the top of the broken end.
Note: when hanging up the outside frame with the x board of waist-shaped hole and the belt, stick the outside frame tightly to
the ceiling and x it.
Install the inner frame on the outside frame (the inverse sequence of unloading the inner frame) (Chart 14)
Note: Connect the remote control receiver with the indoor unit signal wires and x it.
Install remote controller.
1.
2.
3.
4.
5.
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7.
Chart 12
Chart 13
Screw
Canvas air passage
Ceiling
Main body
Canvas air passage
Outside frame
Ceiling
Chart 14
Chart 15
Hook
Waist-shaped hole
xed board
Outside frame
Bend
Outside frame
Air inlet
Inside frame
(Reverse side)
X
O
A
H
B
C
D
E
F
A B C D E F H
18
842 560 335 360 312 324 695
24 895 590 333 355 302 313 862
30 990 624 366 396 340 354 966
36 990 624 366 396 340 354 966
48 940 600 376 400 340 360 1245
60 940 600 376 400 340 360 1245
• 8 • DUCTAIR II - 0808-E
INSTALLATION
OUTDOOR UNIT INSTALLATION
SIDE AIR OUTLET OUTDOOR UNIT
CAUTION
Keep this unit away from direct radiation of the sun or other heaters. If unavoidable, please cover it with a shelter.
In places near coast or with a high attitude where the wind is strong, please install the outdoor unit against the wall
to ensure normal performance.
Use a bafe when necessary.
In the case of extremely strong wind, please prevent the air from owing
backwards into the outdoor unit. (Refer to chart 16)
Locate the outdoor unit as close to the indoor unit as possible.
The minimum distance between the outdoor unit and obstacles described
in the installation chart does not mean that the same is applicable to the
situation of an airtight. Leave open two of three directions A , B, C.
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Chart 16
Size of outdoor unit
Chart 18
Chart 17
Chart 19
Model
A
C
B
DUCTAIR II - 0808-E • 9 •
INSTALLATION
Necessary room for installation and maintenance
If possible, please remove the obstacles nearby to prevent the performance from being impeded by too little of air circulation. Leave
open two of the three directions(A,B,C).
Moving and installing
Since the gravity center of this unit is not at its physical center, so please be careful when lifting it with a sling.
Never hold the air-in of the outdoor unit to prevent it from deforming.
Do not touch the fan with hands or other objects.
Do not lean it more than 45o, and do not lay it sidelong.
Please fasten the feet of this unit with bolts rmly to prevent it from collapsing in case of earthquake or strong wind.
Make concrete foundation. (Refer to chart 21)
Concrete foundation
Foundation could be on at and is recommended be 100-300mm higher than ground level.
Install a drainage around foundation for smooth drain
When installing the outdoor unit x the unit by anchor bolts of M10
When installing the unit on a roof or a veranda, drain water sometimes turns to ice on a cold morning. Therefore, avoid draining
in an area that people often use because it is slippery.
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2.
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Chart 20
(Wall or obstacle)
Air inlet
>60cm
>200 cm
Air outlet
Air inlet
Deep
foundation
Chart 21
>60 cm
Obstacle
Fix with bolt
Necessary width
• 10 • DUCTAIR II - 0808-E
COMMISSIONING
INSTALL THE CONNECTING PIPE
Check whether the height drop between the indoor unit and outdoor unit, the length of refrigerant pipe, and the number of
the bends meet the following requirements:
The max height drop --> 20m
(If the height drop is more than 10m, you had better put the outdoor unit over above the indoor unit.)
The length of refrigerant pipe --> less than 30m
The number of bends --> Less than 15
Do not let air, dust, or other impurities fall in the pipe system during the time of installation.
The connecting pipe should not be installed until the indoor and outdoor units have been xed already.
Keep the connecting pipe dry, and do not let moisture in during installation.
The procedure of connecting pipes
Measure the necessary length of the connecting pipe, and make it by the following way:
Connect the indoor unit at rst, then the outdoor unit.
Bend the tubing in proper way. Don,t harm them.
Cautions
Daub the surfaces of the are pipe and the joint nuts with frozen oil, and wrench it for 3~4 rounds with hands before fasten the
are nuts. (Refer to chart 30)
Be sure to use two wrenches simultaneously when you connect or disconnect the pipes.
The stop valve of the outdoor unit should be closed absolutely (as original state). Every time you connect it, rst loosen the nuts
at the part of stop valve, then connect the are pipe immediately (in 5 minutes). If the nuts have been loosened for a long time,
dusts and other impurities may enter the pipe system and may cause malfunction later. So please expel the air out of the pipe
with refrigerant before connection.
Expel the air (refer to the ¡Expel The Air¡) after connecting the refrigerant pipe with the indoor unit and the outdoor unit. Then
fasten the nuts at the repair-points.
Notice for Benable pipe
The bending angle should not exceed 90°C
Bending position is preferably in the bendable pipe. The larger the better it is .
Do not bend the pipe more than three times.
Bend the connecting pipe of small wall thickness
Cut out a desired concave at the bending part of the insulating pipe.
Then expose the pipe(cover it with tapes after bending).
To prevent collapsing of deforming, please bend the pipe at its biggest radius.
Use bender to get a small radius pipes.
Use the market brass pipe
Be sure to use the same insulating materials when you buy the brass pipe.(More than 9mm thick)
Locate the pipe
Drill a hole in the wall (suitable just for the size of the wall conduit, 90mm in general), then set on the ttings such as the
wall conduit and its cover.
Bind the connecting pipe and the cables together tightly with binding tapes. Do not let air in, which will cause water
leakage by condensation.
Pass the bound connecting pipe through the wall conduit from outside. Be careful of the pipe allocation to do no damage
to the tubing.
Connect the pipes.
Then open the stem of stop valves of the outdoor unit to make the refrigerant pipe connecting the indoor unit with the outdoor
unit uently ow.
Be sure of no leakage by checking it with leak detector or soap water.
Cover the joint of the connecting pipe to the indoor unit with the soundproof/insulating sheath (ttings), and bind it well with
the tapes to prevent leakage.
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Chart 30
Use frozen oil
Chart 31
Bend the pipe with thumb
Chart 32
Make the ends
straight
90
A
90+4
45+2
8,7 8,3
12,4 12
15,8 15,4
19 18,6
23,3 22,9
Ø 6,4 mm
1420~1720N.cm
(144~176 kgf.cm)
Ø 9,5 mm
32700~3990N.cm
(333~407 kgf.cm)
Ø 12,7 mm
4950~6030N.cm
(504~616 kgf.cm)
Ø 15,9 mm
61800~7540N.cm
(630~770 kgf.cm)
Ø 19,1 mm
9720~11860N.cm
(990~1210 kgf.cm)
DUCTAIR II - 0808-E • 11 •
EXPEL THE AIR
Flaring
Cut a pipe with a pipe cutter.
Insert a are nut into a pipe and are the pipe.
1.
2.
COMMISSIONING
Chart 33
lean crude burr
Chart 34
Outside
diameter
A (mm)
Max Min
Ø 6,4 mm
Ø 9,5 mm
Ø 12,7 mm
Ø 15,9 mm
Ø 19,1 mm
Remove the Cycle Service Panel and the Cover Board,
unscrewing the screws which secure it to the structure.
3. Remove the protection cover of stop valve.4.
Chart 35
Cycle service panel
Cover board
Chart 36
Liquid valve
Gas valve
Fasten the nut
Put the connecting tubing at the proper position, wrench the nuts with hands
then fasten it with a wrench. (Refer to Chart 37)
Caution
Too large torque will harm the bellmouthing and too small will cause leakage. Please
determine the torque according to table beside.
•
Chart 37
Tubing
size
Torque
12 18 24 30-60
- - - -
30g x (L-5) 11g x (L-5) 30g x (L-5) 60g x (L-5)
• 12 • DUCTAIR II - 0808-E
COMMISSIONING
The necessary lling amount of refrigerant
Please record the quantity added and store it carefully for future maintenance.
Model
Less than 5 m (one-way)
Added refrigerant when over 5 m (one-way)
Expel the air with a vacuum pump (refer to chart 38)
(Please refer to its manual for the way of using manifold valve)
Loosen and remove the maintenance nuts of stop valves A and B, and connect the charge hose of the manifold valve with the
maintenance terminator of stop valve A. (Be sure that stop valves A and B are both closed)
Connect the joint of the charge hose with the vacuum pump.
Open the Lo-lever of the manifold valve completely.
Turn on the vacuum pump. At the beginning of pumping, loosen the maintenance terminator nut of stop valve B a little to check
whether the air comes in (the sound of the pump changes, and the indicator of compound meter turns below zero). Then fasten
the nut.
When the pumping has nished, close the Lo-lever of the manifold valve completely and turn off the vacuum pump.
When you have pumped for over 15 minutes, please conrm that the indicator of multimeter is on -1.0X10-5Pa (-76cmHg)
Loosen and remove the quadrangle cover of stop valves A and B to open stop valve A and B completely, then fasten them.
Disassemble the charge hose from the repair-mouth of stop valve A, and fasten the nut.
1.
2.
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7.
Chart 38
Hi-lever
Pressure meterMulti-meter
Manifold valve
Charge hose
Vacuum pump
Lo-lever
(Take size 24 as example)
Flare nut
Stopper
Cap
Valve body
Vavle stern
Chart 39
Cautions
All the stop valves should be opened before test operation. Each air conditioner has two stop valves of different sizes on the side
of the outdoor unit which operate as Lo-stop value, respectively. (Refer to Chart 39)
Vacuum dry and leakage checking
Vacuum Dry: use vacuum pump to change the moisture
(liquid) into steam (gas) in the pipe and discharge it out of the
pipe to make the pipe dry. Under one atmospheric pressure,
the boiling point of water(steam temperature) is 100. Use
vacuum pump to make the pressure in the pipe near vacuum
state, the boiling point of water falls relatively. When it falls
under outdoor temperature, the moisture in the pipe will be
vaporized.
1.
Necessary
vaccuum
degree
Relative pressure
DUCTAIR II - 0808-E • 13 •
Vacuum dry procedure
There are two methods of vacuum dry due to different construction environment: common
vacuum dry, special vacuum dry.
Common vacuum dry procedure
Vacuum dry (for the rst time)---connect the all-purpose detector to the inlet of liquid pipe and gas pipe, and run the vacuum
pump more than two hours (the vacuum pump should be below -755mmHg)
If the pump can’t achieve below -755mmHg after pumping 2 hours, moisture or leakage point will still exist in the pipe. At this
time, it should be pumped 1 hour more.
If the pump can’t achieve -755mmHg after pumping 3 hours, please check if there are some leakage points.
Vacuum placement test: place 1 hour when it achieves -755mmHg, pass if the vacuum watch shows no rising. If it rises, it
shows there’s moisture or leakage point.
Vacuuming from liquid pipe and gas pipe at the same time.
Sketch map of common vacuum dry procedure.
2.
a.
•
•
•
•
•
•
Add pressureVacuum
Vacuum dry (2h) Add refrigerant
Vacuum laying test (1h)
Special vacuum dry procedure
This vacuum dry method is used in the following conditions:
There’s moisture when ushing the refrigerant pipe.
Rainwater may enter into the pipe.
Vacuum dry for the rst time ······ 2h pumping
Vacuum destroy for the second time ······ Fill nitrogen to 0.5Kgf/cm²
Because nitrogen is for drying gas, it has vacuum drying effect during vacuum destroy. But if the moisture is too much, this
method can’t dry thoroughly. So, please pay more attention to prevent water entering and forming condensation water.
Vacuum dry for the second time······1h pumping
Determinant: Pass if achieving below -755mmHg. If -755mmHg can’t be achieved in 2h, repeat procedure
Vacuum placing test ······ 1h
Sketch map of special vacuum dry procedure
b.
•
*
*
•
•
•
•
•
Add pressureVacuum
Vacuum dry (2h)
Vacuum laying test (1h)
Vacuum destroy
Vacuum dry (1h)
Vacuum dry (2h)
COMMISSIONING
B
A
D
C
• 14 • DUCTAIR II - 0808-E
CONNECT THE DRAIN PIPE
Install indoor unit drain pipe
The outlet has PTI screw bread, Please use sealing materials and pipe sheath (tting) when connecting PVC pipes.
Caution
The drain pipe of indoor unit must be heat insulated, or it will condense dew, as well as the connections of the indoor unit.
Hard PVC binder must be used for pipe connection, and make sure there is no leakage.
With the connection part to the indoor unit, please be noted not to impose pressure on the side of indoor unit pipes.
When the declivity of the drain pipe downwards is over 1/100, there should not be any winding.
The total length of the drain pipe when pulled out traversely shall not exceed 20m, when the pipe is over long, a prop stand
must be installed to prevent winding.
Refer to the gures on the right for the installation of the pipes.
1.
•
•
•
•
•
•
Chart 41
Put as deep as possible
(about 10 cm)
Chart 42
downward declivity
lower than 1/100
VP30
Bend
S shape
1,5 m ~ 2 m
downward declivity
lower than 1/100
Insulating
material
CHECK THE LEAKAGE
Check all the joints with the leak detector or soap water. (See Chart 40 as
a reference illustration)
Note:
A --> Lo-stop valve
B --> Hi-stop valve
C,D --> Joints of the connecting pipe to the indoor unit.
Check-point of indoor unit
Chart 40
Check-point of outdoor unit
Water drainage
Gradient and Supporting
Keep the drainpipe sloping downwards at a gradient of at least 1/100. Keep the drainpipe as short as possible and eliminate
the air bubble.
The horizontal drainpipe should be short. When the pipe is too long, a prop stand must be installed to keep the gradient of 1/100
and prevent bending. Refer to the following table for the specication of the prop stand.
I.
1.
2.
Diameter Distance between the prop stands
Hard PVC pipe 25~40 mm 1,5~2 m
COMMISSIONING
DUCTAIR II - 0808-E • 15 •
Precautions
The diameter of drainpipe should meet the drainage requirement at least.
The drainpipe shou ld be heat-insulated to prevent atomization.
Drainpipe should be installed before installing indoor unit. After powering on, there is some water in water-receiver plate.
Please check if the drain pump can operate correctly.
All connection should be rm.
Wipe color on PVC pipe to note connection.
Climbing, horizontal and bending conditions are prohibited.
The dimension of drainpipe can’t less than the connecting dimension of indoor drainpipe.
Heat-insulation should be done well to prevent condensation.
Indoor units with different drainage type can’t share one convergent drainpipe.
Drainpipe Trap
If the pressure at the connection of the drainpipe is negative, it needs to design drainpipe trap.
Every indoor unit needs one drainpipe trap.
A plug should be designed to do cleaning.
3.
•
•
•
•
•
•
•
•
•
II.
1.
2.
3.
Plug
Upwards drainage (drain pump)
To ensure the gradient 1/100, the drainpipe can be lifted to 340mm. After upwards, place downwards, or it will cause malfunction
to drain pump.
III.
1.
Up to 340 mm below
Up to 500 mm below
Below 100 mm
Indoor unit
Below ceiling
Convergent drainage
The number of indoor units should be as small as possible to prevent the traverse main pipe overlong.
Indoor unit with drain pump and indoor unit without drain pump should be in different drainage system.
IV.
1.
2.
100 mm or above
Air-ventilation
Gradient 1/100 or above
COMMISSIONING
§ ≤ 14 ¢ 25 3,0
14 < § ≤ 88 ¢ 30 3,5
88 < § ≤ 334 ¢ 40 4,0
175 < § ≤ 334 ¢ 50 4,5
334 < § ¢ 80 6,0
• 16 • DUCTAIR II - 0808-E
Test cover
Water to the receiver
through the stow tube
Chart 42
(Take size 36 as example)
Chart 43
Seal Drain elbow
The base
pan hole of
outdoor unit
The base
pan hole of
outdoor unit
Seal
Drain elbow
Selecting the diameter
Number of connecting indoor units → Calculate drainage volume → Select the diameter
Calculate allowed volume =Total cooling capacity of indoor units(HP)×2 (l/ hr)
3.
Allowed volume (lean 1/100) (l/h) I.D. (mm)
Thick
Hard
Hard
Hard
Hard
Hard
Drainage test
Check whether the drainpipe is unhindered
New built house should have this test done before paving the ceiling.
Remove the test cover, and stow water of about 2000ml to the water receiver through the stow tube. (Refer to chart 43)
Drainage without drain pump
After nishing drainpipe installation, pour some water into the water receiver plate to check if the water ows smoothly.
Drainage with drain pump
Poke the Water Level Switch , remove the cover, use water pipe to pour 2000ml water into the water receipt plate through the
water inlet.
V.
•
•
•
1.
2.
Pour waterWater inlet
Turn on the power to Cooling operation. Check the pump’s operation and switch on the Water Level Switch. Check the pump’s
sound and look into the transparent hard pipe in the outlet at the same time to check if the water can discharge normally.
Stop the air conditioner running, turn off the power, and put back the cover.
Stop the air conditioner. After 3 minutes, check if it has abnormity. If the collocation of drainpipes is illogical, the water will
ow back overfull, which will cause the alarm lamp ashes, even overow from the water receipt plate.
Keep on pouring water until it gives an alarm signal for high water level, check if the pump drains water at once. If the water
level can’t fall below the alarmed water level after 3 minutes, the air conditioner will stop. Turn off the power and drain the
remained water, then turn on the air conditioner.
Note: the drain stuff in the main water receipt plate is for maintenance. Stuff up the drain stuff to prevent water leakage.
a.
b.
•
•
COMMISSIONING
Ø 6,4 - Ø 25,4 10 mm
Ø 28,6 - Ø 38,1 15 mm
6 mm
DUCTAIR II - 0808-E • 17 •
COMMISSIONING
Drain elbow installation (cooling only type without)
Fit the seal into the drain elbow, then insert the drain elbow into the base pan hole of outdoor unit, rotate 90° to securely assemble
them. Connect the drain elbow with an extension drain hose (Locally purchased), in case of the condensate draining off the outdoor
unit during the heating mode. (Refer to Chart 43)
Insulation work
Be sure to with insulating materials cover all the exposed parts of the are pipe joints and refrigerant pipe on the liquid-side and
the gas-side. Ensure that there is no gap between them.
Incomplete insulation may cause water condensation.
Insulation material and thickness
Insulation material
Insulation material should adopt the material which is able to endure the pipe’s temperature: no less than 70°C in the highpressure side, no less than 120°C in the low-pressure side (For the cooling type machine, no requirements at the low-pressure
side.)
Example: Heat pump type----Heat-resistant Polyethylene foam (withstand above 120°C)
Cooling only type---- Polyethylene foam (withstand above 100°C)
Thickness choice for insulation material
Insulation material thickness is as follows:
•
•
I.
1.
2.
Pipe diameter (mm Adiabatic material thickness
Refrigerant pipe
Drainage pipe Inner diameter Ø 20 - Ø 32
Refrigerant pipe insulation
Work procedure
Before laying the pipes, the non-jointing parts and non-connection parts should be heat insulated.
When the gas proof test is eligible, the jointing area, expanding area and the ange area should be heat insulated.
Insulation for non-jointing parts and non-connection parts
Wrong Right
Gas pipe and liquid pipe should not be
put together to insulate
Insulate the pipe (cooling only) Insulate the pipe and liquid pipe
For construction convenience, before laying pipes, use insulation material to insulate the pipes to be deal with, at the same time, at
two ends of the pipe, remain some length not to be insulated, in order to be welded and check the leakage after laying the pipes.
II.
1.
a.
b.
2.
Gas pipe
Binder
Liquid pipe
Liquid pipe
Gas pipe
Binder
Heat insulation
Liquid pipe
Gas pipe
Binder
Liquid pipe
Heat insulation
• 18 • DUCTAIR II - 0808-E
COMMISSIONING
Insulate for the jointing area, expanding area and the ange area
Insulate for the jointing area, expanding area and the ange area should be done after checking leakage of the pipes
Make sure there’s no clearance in the joining part of the accessorial insulation material and local preparative insulation
material.
3.
a.
b.
No clearance at connecting part
Heat insulation material should be overlap
Heat-insulation material
(on eld)
Drainage pipe insulation
The connection part should be insulated, or else water will be condensing at the non-insulation part.
Note
The jointing area, expanding area and the ange area should be heat insulated after passing the pressure test
The gas and liquid pipe should be heat insulated individually, the connecting part should be heat insulated individually.
Use the attached heat-insulation material to insulate the pipe connections (pipes’ tie-in ,expand nut ) of the indoor unit
III.
IV.
1.
2.
3.
12 18 24 30 30 36 48 60
1 Ph 1 Ph 1 Ph 1 Ph
3 Ph 3 Ph 3 Ph 3 Ph
220-240V ~, 50 Hz 380V 3N ~, 50 Hz
20/10
40/25 40/25 40/25 20/15 20/15 20/15 20/15
2,0 3x2,0 3x2,5 3x3,5 5x1,5 5x2,5 5x2,5 5x2,5
2,0 2,0 2,5 3,5 1x5 2,5 2,5 2,5
2,0 - 3x2,5 3x3,5 5x1,5 5x2,5 5x2,5 5x2,5
2,0 5x2,0 3x1,0 3x2,5 5x1,0
0,5
DUCTAIR II - 0808-E • 19 •
COMMISSIONING
WIRING
Attaching wiring
The air conditioner should use separate power supply with rated voltage
The external power supply to the air conditioner should have ground wiring, which is linked to the ground wiring of the indoor
and outdoor unit.
The wiring work should be done by qualied persons according to circuit drawing.
A leakage protector should be installed according to the National Standard concerning electrical appliance.
Be sure to locate the power wiring and the signal wring well to avoid cross-disturbance and their contact with connecting pipe
or stop value body.
The wiring attached to this air conditioner is 10m long. Be sure to prolong it with wiring of the same type and proper length if
necessary. Generally, do not twist two wiring together unless the joint is soldered well and covered with insulator tape.
Do not turn on the power until you have checked carefully after wiring.
An all-pole disconnection device which has at least 3mm separation distance in all pole and a residual current device(RCD)with
the rating of above 10mA shall be incorporated in the xed wiring according to the national rule
1.
2.
3.
4.
5.
6.
7.
8.
Size
Power
Phase
Frequency and voltage
Circuti breaker/fuse (A)
Indoor unit power wiring (mm²)
indoor/
outdoor
connecting
wiring
(mm²)
Ground wiring
Outdoor unit power wiring
Strong electric signal 3x1,0 3-core sheild wire
Weak electric signal
1-core sheild wire
1x0,5 mm²
2-core
sheild wire
2x0,5 mm²
- - -
The specication fo power (for side air outlet outdoor unit)
Caution
A disconnection device having an air gap contact separation in all active conductors should be incorporated in the xed wiring
according to the National Wiring Regulation.
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualied person in order
to avoid a hazard.
Wiring chart (for side air outlet outdoor unit)
Installing wiring chart, refer to link circuit chart for details
Power
Chart 47
Switch/Fuse
(available locally)
Power wiring (indoor)
Ground wiring
Strong elec-signal link wiring
Weak elec-signal link wiring
Grounding the air conditioner properly in case to affect its
anti-inteference function
XT2
T3 E
XT1
1 3
2(N)
4
XT2
T3
E
L
3
2(N)
1 4
XT1
• 20 • DUCTAIR II - 0808-E
COMMISSIONING
Caution: The wiring chart of both cooling only type and cooling& heating type are shown as follows.When wiring, please
choose the corresponding chart,or it may cause damage.
Size 12
Size 18
Chart 48
INDOOR UNIT
OUTDOOR UNIT
5-core cable
5x2,0 mm²
POWER:
220-240V ~50 Hz
(3-core cable
3x2,0 mm²)
1-core shield wire
1x0,5 mm²
Air condition Link-Circuit
INDOOR UNIT
OUTDOOR UNIT
5-core cable
5x2,0 mm²
POWER:
220-240V ~50 Hz
(3-core cable
3x2,0 mm²)
1-core shield wire
1x0,5 mm²
Air conditioner electric wiring chart
A
B NC
21
3 4 5
DUCTAIR II - 0808-E • 21 •
COMMISSIONING
Size 24
Chart 49
INDOOR UNIT
3-core cable
3x1,0 mm²
POWER:
220-240V ~50 Hz
(3-core cable
3x2,5 mm²)
1-core shield wire
1x0,5 mm²
Air condition Link-Circuit
OUTDOOR UNIT
3-core cable
3x2,5 mm²
Size 30 - 1 Phase
Chart 51
INDOOR UNIT
OUTDOOR UNIT
3-core cable
3x2,5 mm²
POWER:
220-240V ~50 Hz
(3-core cable
3x2,5 mm²)
1-core shield wire
1x0,5 mm²
Air condition Link-Circuit
3-core cable
3x2,5 mm²
• 22 • DUCTAIR II - 0808-E
COMMISSIONING
Size 30 - 3 Phases
Chart 50
INDOOR UNIT
5-core cable
5x1,5 mm²
POWER:
380V 3N ~50 Hz
(5-core cable
5x1,5 mm²)
2-core shield wire
2x0,5 mm²
Air condition Link-Circuit
OUTDOOR UNIT
5-core cable
5x1,0 mm²
Sizes 36 to 60 - 3 Phases
Chart 52
INDOOR UNIT
OUTDOOR UNIT
5-core cable
5x2,5 mm²
POWER:
380V 3N ~50 Hz
(5-core cable
5x2,5 mm²)
Air condition Link-Circuit
3-core cable
3x1,0 mm²
DUCTAIR II - 0808-E • 23 •
COMMISSIONING
THE OUTDOOR UNITS
Disassemble the bolts from the maintenance board, and pull it in the direction of the arrow to remove the protection board.
Notice: Do not scratch the surface during operation.
Caution: Chart 59 is based on one type of outdoor units, which may look different from your own outdoor unit.
Chart 59
Protection
board
Terminator
TEST OPERATION
The test operation must be carried out after the entire installation has been completed.
Please conrm the following points before the test operation:
The indoor unit and outdoor unit are installed properly.
Tubing and wiring are correctly completed.
The refrigerant pipe system is leakage-checked.
The drainage is unimpeded.
The heating insulation works well.
The ground wiring is connected correctly.
The length of the tubing and the added stow capacity of the refrigerant have been recorded.
The power voltage ts the rated voltage of the air conditioner.
There is no obstacle at the outlet and inlet of the outdoor and indoor and indoor units.
The gas-side and liquid-side stop values are both opened.
The air conditioner is pre-heated by turning on the power.
According to the user¡s requirement, install the remote controller frame where the remote controller¡s signal can reach the indoor
unit smoothly.
Test operation:
Set the air conditioner under the mode of ¡COOLING¡with the remote controller, and check the following points per the “Owner’s
Manual”. If there is any malfunction, please resolve it through chapter “Troubles And Causes” in the “Owner’s Manual”.
The indoor unit
Whether the switch on the remote controller works well.
Whether the buttons on the remote controller works well.
Whether the air ow louver moves normally.
Whether the room temperature is adjusted well.
Whether the indicator lights normally.
Whether the temporary buttons works well.
Whether the drainage is normal.
Whether there is vibration or abnormal noise during operation.
Whether the air conditioner heats well in the case of the HEATING/COOLING type.
The outdoor unit
Whether there is vibration or abnormal noise during operation.
Whether the generated wind, noise, or condensed water by the air conditioner have inuenced your neighborhood.
Whether any of the refrigerant is leaked.
Cautions:
A protection feature prevents the air conditioner from being activated for approximately 3 minutes when it is restarted immediately
after shut off.
1.
2.
•
•
•
•
•
•
•
•
•
•
•
3.
4.
i.
a.
b.
c.
d.
e.
f.
g.
h.
i.
ii.
a.
b.
c.
1 x • • x x
2 • • x x x
3 x x • • x
4 • • x x • •
5 • • • • • • • •
6 • • • • x x
7 x x x • •
• 24 • DUCTAIR II - 0808-E
SELF-DIAGNOSIS AND TROUBLESHOOTING
INDOOR UNIT’S LED INDICATION OF TROUBLE
N° Protection or malfunction
Operation
lamp
Timer
lamp
Defrosting
lamp
Water level
alarm lamp
Auto
recover
Indoor temperature sensor abnormal Yes
Indoor heat exchanger sensor abnormal Yes
Outdoor heat exchanger sensor abnormal Yes
Water pump temperature sensor abnormal Yes
Outdoor abnormal Yes
EEPROM abnormal No
Water level warming Yes or No
x: Extinguish
• •: Flash at 5 Hz
LEDS’ FOR THE INDICATION OF OUTDOOR TROUBLE
For sizes 30 to 60, 380-415V, 3 phase
Type Contents LED1 LED2 LED3
Protection Pahse sequence Flash Off Off
Protection Overload of current Off Off Flash
Protection Lack of phase Flash Off Off
Protection Protection of pressure Flash Flash Off
Protection Open circuit and short-circuit trouble of T3 Off Flash Flash
Protection Open circuit and short-circuit trouble of T4 Off Flash Off
Protection High temperature protection of condenser Flash Flash Flash
PHASE SEQUENCE ERROR
Phase sequence error
Change the order of two of the wires to power supply
Switch on the unit again
If the problem can not be solved, the outdoor PCB is defective
DUCTAIR II - 0808-E • 25 •
SELF-DIAGNOSIS AND TROUBLESHOOTING
OVERLOAD OF CURRENT
Overload of current
Check the current, normally
The maximum current for size 36 is 9,4 A
The maximum current for size 48 is 10,9 A
The maximum current for size 60 is 13,2 A
Is the current in rated range?
The outdoor PCB is defective
Yes
Possible reasons:
Outdoor fan is defective
The compressor is defective
Refrigerant is over charged
Air enter the refrigerant system
Heat exchanger is too dirty
1.
2.
3.
4.
5.
No
LACK OF PHASE
Lack of phase
Check the power supply, it is 3 phase
Check the connection between power supply and terminal
Outdoor PCB is defective
PROTECTION OF PRESSURE OR TEMPERATURE
Yes
Yes
Is temperature protective switch K2
Possible reasons:
The wires is loose to K2
Air or other gas in the refrigerant
Heat exchanger is dirty
Outdoor fan or fan blade is defective
Outdoor unit is bad ventilation
Refrigerant is two much
1.
2.
3.
4.
5.
6.
Protection of pressure or temperature
Is it K1 or K2 open?
Is temperature protective swit K2
Possible reasons:
The wires is loose to K1
Air or gas in the refrigerant
Heat exchanger is dirty
Outdoor fan or fan blade is defective
Outdoor unit is bad ventilation
Refrigerant is leakage
1.
2.
3.
4.
5.
6.
• 26 • DUCTAIR II - 0808-E
SELF-DIAGNOSIS AND TROUBLESHOOTING
OPEN-CIRCUIT AND SHORT-CIRCUIT TROUBLE OF T3
Is connection to connector of temperature sensor good?
Check the resistance of the temperature sensor according
to Annex 1
Is the resistance normal?
Indoor PCB is defective
Yes
Repair connector
No
Yes
Replace the sensor
No
OPEN-CIRCUIT AND SHORT-CIRCUIT TROUBLE OF T4
Is connection to connector of temperature sensor good?
Check the resistance of the temperature sensor according
to Annex 1
Is the resistance normal?
Indoor PCB is defective
Yes
Repair connector
No
Yes
Replace the sensor
No
HIGH TEMPERATURE PROTECTION OF CONDENSER
Yes
Replace the sensor
High temperature protection of condenser
Check the resistance of the temperature sensor according
to Annex 1, is it normal
Possible reasons:
Air or other gas in the refrigerant
Heat exchanger is dirty
Outdoor fan or fan blade is defective
Outdoor unit is bad ventilation
Refrigerant is leakage
1.
2.
3.
4.
5.
No
DUCTAIR II - 0808-E • 27 •
SELF-DIAGNOSIS AND TROUBLESHOOTING
CLEAN
Caution: Please turn off your air conditioner and disconnect power supply before cleaning.
CLEANING INDOOR UNIT
Use a dry to wipe the indoor unit.
A cloth dampened with cold water may be used if the indoor unit is too dirty.
It is allowed to remove the front panel of indoor unit and clean it with water, and ensure to wipe it up with a dry rag.
Note: Do not use a chemically treated duster for wiping or leave such materials near the unit for long.
Do not use benzene, thinner, polishing powder, or similar solvents for cleaning.
CLEANING AIR FILTER
The air lter in unit can lter dust and other granules in air. It may reduce the cooling effect that the air lter is covered with
dust. So clean the air lter often.
•
•
•
•
•
TROUBLES AND SOLUTIONS
If any the following abnormal conditions occur, turn off the power supply immediately. Please contact our dealer.
TROUBLES
Indicator lamps ash rapidly, after your disconnecting and connecting the unit, the situation is the
same.
Fuse or circuit breaker work frequently.
Foreign matter or water has fallen into the unit.
Remote controller is disabled or the switch is out of hand.
Any other unusual conditioner is observed.
If any the following abnormal conditions occur, check your unit and resolve corresponding problems referring to
given remediation. If the trouble can’t be settled, coutact our dealer.
Trouble Cause Solutions
Unit does not start
Power failure Wait for the comeback of power
Power switch is open.
Switch on the power
Fuse of power switch may have blown Replace the fuse
Batteries of remote controller are exhausted Replace the batteries
The time si not start-up time you have set.
Wait or cancel the time set
Air owing normally with
low cooling (heating)
effect
Temperature is not set correctly Set the temperature properly
Door or window is open Close door or window
Air lter is blocked with dust or dirtiness Clean the air lter
Inlet/oultet of indoor/outdoor units are blocked Clear all blockages, the restart the operation
Be in 3 minutes protection of compressor Wait
Note: Do not replace electric wire or repair the air conditioner by yourself to avoid possible danger
• 28 • DUCTAIR II - 0808-E
SELF-DIAGNOSIS AND TROUBLESHOOTING
TROUBLES AND SOLUTIONS CONCERNING THE REMOTE CONTROLLER
Please make the following check before asking for repair or maintenance:
Trouble Cause Solutions
Can not change the fan
speed setting
Check if the mode display on the LCD is AUTO
The Indoor unit will select fan speed
automatically when AUTO mode is selected.
Check if the mode display on the LCD is DRY
The Indoor unit will select fan speed
automatically when the unit is on DRY mode.
The transmission symbol does not ash
Symptom Checking items Cause
Press ON/OFF button, the remote
controlling signals can not be
transmitted
Check if the remote controller has run
out of power
When the battery was out, transmission
signals can not be sent.
Temperature display disappear
Symptom Checking items Cause
Temperature display does not light
Check if the mode display on the LCD is
FAN ONLY
You can not set the temperature when
the unit is on FAN ONLY mode.
The display goes off
Symptom Checking items Cause
The indication on the display disappears
after a lapse of time.
Check wether the timer operation has
come to an end when OFF TIMER is
indicated on the display.
The air conditioner operations stops
since the set time elapsed.
The ON TIMER indicators go off after a
lapse of certain time
Check wether the timer operation is
started when the ON TIMER is indicated
on the display.
When the time set to start the air
conditioner is reached, the air
conditioner will automatically start and
the appropriate indicator will go off.
The signal receiving tone does not sound
Symptom Checking items Cause
No receiving tone sounds from the
indoor unit even when the ON/OFF
button is pushed.
Check wether the signal transmitter of
the remote controller is properly directed
to the receiver of the indoor unit when
the ON/OFF button is pushed.
Direct the signal transmitter of the
remote controller to the receiver of the
indoor unit, and then repeatly push the
ON/OFF button twice.
Buttons on the remote controller don’t
work.
Press reset button.
DUCTAIR II - 0808-E • 29 •
-20 115.266 20 12.6431 60 2.35774 100 0.62973
-19 108.146 21 12.0561 61 2.27249 101 0.61148
-18 101.517
22 11.5000 62 2.19073 102 0.59386
-17 96.3423
23 10.9731 63 2.11241 103 0.57683
-16 89.5865
24 10.4736 64 2.03732 104 0.56038
-15 84.2190
25 10.0000 65 1.96532 105 0.54448
-14 79.3110
26 9.55074 66 1.89627 106 0.52912
-13 74.5360
27 9.12445 67 1.83003 107 0.51426
-12 70.1698
28 8.71983 68 1.76647 108 0.49989
-11 66.0898
29 8.33566 69 1.70547 109 0.48600
-10 62.2756
30 7.97078 70 1.64691 110 0.47256
-9 58.7079 31 7.62411 71 1.59068 111 0.45957
-8 56.3694 32 7.29464 72 1.53668 112 0.44699
-7 52.2438 33 6.98142 73 1.48481 113 0.43482
-6 49.3161 34 6.68355 74 1.43498 114 0.42304
-5 46.5725 35 6.40021 75 1.38703 115 0.41164
-4 44.0000 36 6.13059 76 1.34105 116 0.40060
-3 41.5878 37 5.87359 77 1.29078 117 0.38991
-2 39.8239 38 5.62961 78 1.25423 118 0.37956
-1 37.1988
39 5.39689 79 1.21330 119 0.36954
0 35.2024 40 5.17519 80 1.17393 120 0.35982
1 33.3269 41 4.96392 81 1.13604 121 0.35042
2 31.5635 42 4.76253 82 1.09958 122 0.3413
3 29.9058 43 4.57050 83 1.06448 123 0.33246
4 28.3459 44 4.38736 84 1.03069 124 0.32390
5 26.8778 45 4.21263 85 0.99815 125 0.31559
6 25.4954 46 4.04589 86 0.96681 126 0.30754
7 24.1932 47 3.88673 87 0.93662 127 0.29974
8 22.5662 48 3.73476 88 0.90753 128 0.29216
9 21.8094 49 3.58962 89 0.87950 129 0.28482
10 20.7184
50 3.45097 90 0.85248 130 0.27770
11 19.6891 51 3.31847 91 0.82643 131 0.27078
12 18.7177
52 3.19183 92 0.80132 132 0.26408
13 17.8005
53 3.07075 93 0.77709 133 0.25757
14 16.9341
54 2.95896 94 0.75373 134 0.25125
15 16.1156
55 2.84421 95 0.73119 135 0.24512
16 15.3418
56 2.73823 96 0.70944 136 0.23916
17 14.6181
57 2.63682 97 0.68844 137 0.23338
18 13.9180
58 2.53973 98 0.66818 138 0.22776
19 13.2631
59 2.44677 99 0.64862 139 0.22231
SELF-DIAGNOSIS AND TROUBLESHOOTING
APPENDIX 1: INDOOR TEMPERATURE AND PIPE TEMPERATURE SENSOR RESISTANCE VALUE
TABLE
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