GIA GIA-MDI-09M01 Service manual

M01
GIA-MDI-09M01 | GIA-MDI-12M01
GIA-MDI-18M01 | GIA-MDI-24M01
Thanks for choossing our product.
Please, read carefully this manual
before using the product
OWNER’S AND INSTALLATION
MANUAL
DUCTS
ENGLSIH

User Notice
◆The total capacity of the indoor units which runs at the same time can not
exceed 150% of that of the outdoor units; otherwise, the cooling (heating) effect of each
indoor unit would be poor.
◆Switch the main power on 8 hours before start the unit, helpful for a successful
startup.
◆It is a normal phenomenon that the indoor unit fan will still run for 20~70
seconds after the indoor unit receives the “stop” signal so as to make full use of
after-heat for the next operation.
◆When the running modes of the indoor and outdoor units conflict, it will be
indicated on the display of the wired controller in five seconds and then the indoor unit
will stop. In this case, they can back to the normal condition by harmonizing their
running modes: the cooling mode is compatible with the dehumidifying mode and the
fan mode can go with any other mode. If the supply power fails when the unit is running,
then the indoor unit will send the “start” signal to the outdoor unit three minutes later
after power recovery.
◆During installation, the communication cable and the power cord must not be
twisted together but instead separated with an interval of at least 2cm; otherwise the
unit is likely to run abnormally.
◆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.
◆If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
◆This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved. Children shall not play
with the appliance. Cleaning and user maintenance shall not be made by children
without supervision.

◆If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
◆The appliance shall be installed in accordance with national wiring regulations.
Correct Disposal of this product
This marking indicates that this product should not be disposed
with other household wastes throughout the EU. To prevent possible
harm to the environment or human health from uncontrolled waste
disposal, recycle it responsibly to promote the sustainable reuse of
material resources. To return your used device, please use the return
and collection systems or contact the retailer where the product was
purchased. They can take this product for environmental safe
recycling.
R410A(R32/125:50/50):2087.5

Contents
ⅠSafety Precautions ...................................................................................................1
ⅡInstallation Location and Matters Needing Attention.................................................3
1 How to select the installation location for the indoor unit...................................3
2 Electric Wiring....................................................................................................4
3 Earthing Requirements......................................................................................4
4 Accessories for Installation ................................................................................4
ⅢInstallation Instructions............................................................................................. 5
1 Outline Dimension Drawings of the Indoor Unit................................................. 5
2 Dimension Requirements on the Installation Space of the Indoor Unit ..............6
3 Installation of the Indoor Unit............................................................................. 6
4 Horizontality Check of the Indoor Unit ...............................................................8
5 Installation of theAir Supply Duct ......................................................................8
6 Drawings of the Air Supply Outlet and Return Air Inlet.....................................10
7 Installation of the Return Air Duct ....................................................................10
8 Installation of the Condensate Pipe ................................................................. 11
9 Design of the Drain Pipe.................................................................................. 12
10 Installation of the Drain Pipe..........................................................................12
11 Precautions for the Lift Pipe........................................................................... 13
12 Test for the Drainage System.........................................................................14
13 Piping............................................................................................................. 15
14 Insulation for the Refrigerant Pipe .................................................................16
15 Wiring between the Wire and the Wiring Terminal......................................... 16
16 Wiring of the Power Cord (single-phase)....................................................... 18
17 Wiring of the Signal Line of the Wired Controller........................................... 19
18 Electric Installation......................................................................................... 20
ⅣRated Working Conditions...................................................................................... 20
ⅤError Analysis......................................................................................................... 21
ⅥMaintenance........................................................................................................... 22

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ⅠSafety Precautions
Please read this manual carefully before use and operate correctly as instructed in
this manual.
Please especially take notice of the following two symbols：
Warning! It indicates improper operation which will lead to human casualty or
sever injury.
Cuation! It indicates improper operation which will lead to injury or property
damage.
Warning!
◆The installation should be committed to the appointed service center; otherwise
it all cause water leakage, electric shock or fire etc.
◆Please install the unit where is strong enough to withstand the weight of the unit;
otherwise, the unit would fall down and cause injury or death.
◆The drain pipe should be installed as instructed in the manual to guarantee the
proper drainage; meanwhile it should be insulated to prevent condensing; otherwise the
improper installation would cause water leakage and then wet the household wares in
the room.
◆Do not use or place any inflammable or explosive substance near the unit.
◆Under the occurrence of an error (like burning smell etc.), please cut off the main
power supply of the unit.
◆Keep good ventilation in the room to avoid oxygen deficit.
◆Never insert your finger or any other object into the air outlet/inlet grille.
◆Please take notice of the supporting frame of the unit to see if it is damaged over
the long time period of use.
◆Never refit the unit and contact the sales agent or the professional installation
personnel for the repair or relocation of the unit.
An all-pole disconnection switch having a contact separation of at least 3mm in all
poles should be connected in fixed wiring.
Cuation!
◆Before installation, please check if the power supply corresponds with the

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requirement specified on the nameplate and also check its security.
◆Before use, please check if the piping and wiring are correct to avoid water
leakage, refrigerant leakage, electric shock, fire etc.
◆The main power supply must be earthed to avoid the hazard of electric shock
and never connect this earth wire to the gas pipe, running water pipe, lightening rod or
phone cable’s earth lead.
◆Turn off the unit after it runs at least five minutes; otherwise its service life will be
shortened.
◆Do not allow children operate this unit.
◆Do not operate this unit with wet hands.
◆Cut off the main power supply prior to the cleaning of the unit or the replacement
of the air filter.
◆When the unit is not to be used for a long time, please cut off the main power
supply of the unit.
◆Do not expose the unit to the moist or corrosive circumstances.
◆After the electric installation, please take an electric leakage test.

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ⅡInstallation Location and Matters Needing Attention
The installation of the unit must comply with the national and local safety
regulations. The installation quality directly affects the normal use, so the user
should not carry out the installation personally. Instead, the installation and
debugging should be done by the professional personnel. Only after that, can the
unit be energized.
1How to select the installation location for the indoor
unit
a. Where there is no direct sunlight.
b. Where the top hanger, ceiling and the building structure are strong enough to
withstand the weight of the unit.
c. Where the drain pipe can be easily connected to outside.
d. Where the flow of the air inlet and outlet are not blocked.
e. Where the refrigerant pipe of the indoor unit can be easily led to outside.
f. Where there is no inflammable, explosive substances or their leakage.
g. Where there is no corrosive gas, heavy dust, salt mist, smog or moisture.
CUATION！
The unit which is installed in the following places is likely to run abnormally. If
unavoidable, please contact the professional personnel at the GIA appointed service
center：
①Where is full of oil;
②Alkaline soil off the sea;
③Where there is sulfur gas(like sulfur hot spring);
④Where there are devices with high frequency (like wireless devices, electric
welding devices, or medical equipments);
⑤Special circumstances.

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2 Electric Wiring
a. The installation must be done in accordance with the national wiring regulations.
b. Only the power cord with the rated voltage and exclusive circuit for the air
conditioning can be used.
c. Do not pull the power cord by force.
d. The electric installation should be carried out by the professional personnel as
instructed by the local laws, regulations and also this manual.
e. The diameter of the power cord should be large enough and once it is damaged
it must be replaced by the dedicated one.
f. The earthing should be reliable and the earth wire should be connected to the
dedicated device of the building by the professional personnel. Besides, the air switch
coupled with the leakage current protection switch must be equipped, which is of
enough capacity and of both magnetic and thermal tripping functions in case of the
short circuit and overload.
3 Earthing Requirements
a. The air conditioner is classified into the Class I appliances, so its earthing must
be reliable.
b. The yellow-green line of the air conditioner is the earth line and can not be used
for other purpose, cut off or fixed by the self-tapping screw; otherwise it would cause
the hazard of electric shock.
c. The reliable earth terminal should be provided and the earth wire can not be
connected to any of the following places：
①Running water pipe;
②Coal gas pipe;
③Sewage pipe;
④Other places where the professional personnel think unreliable.
4 Accessories for Installation
Refer to the packing list for the accessories of the indoor and outdoor units
respectively.

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ⅢInstallation Instructions
1 Outline Dimension Drawings of the Indoor Unit
Note: the unit in the followings figures is mm, unless otherwise specified.
Fig.1 is applicable to
GIA-MDI-09M01, GIA-MDI-12M01, GIA-MDI-18M01, GIA-MDI-24M01:
Fig.1
Table 1: Outline Dimensions ：
Item
Model
A
B
C
D
E
F
G
H
I
J
GIA-MDI-09M01
742
491
662
620
700
615
782
156
200
635
GIA-MDI-12M01
GIA-MDI-18M01
942
491
862
820
900
615
982
156
200
635
1142 491 1062 1020 1100 615 1182 156 200 635
GIA-MDI-24M01

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2 Dimension Requirements on the Installation Space of
the Indoor Unit
Fig. 2
3 Installation of the Indoor Unit
a. Requirements on the Installation Location
1) Ensure the hanger is strong enough to withstand the weight of the unit.
2) The drainage of the drain pipe is easy.
3) No obstacle is in the inlet/outlet and the air circulation is in good condition.
4) Ensure the installation space shown in Fig.2 is left for the access to
maintenance.
5) It should be far away from where there is heat source, leakage of inflammable,
explosive substances, or smog.
6) It is the ceiling type unit (concealed in the ceiling).
7) The power cords and connection lines of the indoor and outdoor units must be
at least 1m away from the TV set or radio to avoid the image interference and noise
( even if 1m is kept, the noise may be produced due to the strong electric wave).
b. Installation of the Indoor Unit
1) Insert the M10 expansion bolt into the hole, and then knock the nail into the
bolt. Refer to the Outline Dimension Drawings of the Indoor Unit for the distance