GIA GIA-MCF-18M01 Service manual

OWNER’S AND INSTALLATION
MANUAL
FLOOR AND CEILING INDOOR MULTI
M01
GIA-MCF-18M01 |GIA-MCF-24M01
ENGLSIH
Thanks for choossing our product.
Please, read carefully this manual
before using the product

II
User Notice
◆When operating, the entire capacity of the cooperating indoor unit should be not
larger than 150% of outdoor unit. Otherwise, it will cause the shortage of cooling
(heating) capacity.
◆The power supply of the entire unit must be the power supply of outdoor unit.
And disconnect the main power of outdoor units before cleaning.
◆In order to turn on the units successfully, the main power switch should be
opened 8 hours before the operation.
◆After receiving the turn off signal, every indoor unit will continue to work for
20-70sec to make use of the rest cool air or the rest heat air in the heat exchanger,
while preparing for the next operation. And this is normal.
◆When the selected operating mode of the indoor unit are clash with the
operating mode of the outdoor unit, the malfunction light will blink after 5s on the indoor
unit or remote controller showing that the operation clash, then the indoor unit will stop.
At this time, change the operation mode of the indoor unit to the one that would not
clash with the outdoor operating mode to make the operation normal. The cooling mode
is not clash with the dry mode, while the fan mode is not clash with any mode.
◆The appliance shall not be installed in the laundry .The appliance shall not be
used by children without supervisor.
◆An all-pole disconnection switch having a contact separation of at least 3mm in
all poles should be connected in fixed wiring.
◆Missing information regarding electric supply tolerances(+/-10%, +/-1Hz) in
documentation.
◆Humidity range: 30%~95%.
◆Main switch provided by end user: main switch handle should be black or gray,
it can be locked in ―OFF‖ position with padlock.
◆The main disconnection device should be installed at a height of 0.6~1.7m.
over current protection is required(EN 60947-3, EN 60947-2).
◆The cooling range of the unit is the outdoor environment temp.-5~48℃DB, the
heating range of the unit( only for the heat pump type unit) is the outdoor environment
temp. -15~27℃DB.
◆This appliance can be used by children aged from 8 years and above and

III
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.
◆The appliance shall be installed in accordance with national wiring regulations.
◆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.
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

IV
Contents
ⅠSAFETY INFORMATION..................................................................................... 1
ⅡSELECTION OF INSTALLATION LOCATION AND PRECAUTIONS............................ 3
1SELECTION OF INSTALLATION LOCATION FOR AIR CONDITIONER UNIT................ 3
2SELECTION OF INSTALLATION LOCATION .............................................................. 3
3CAUTION FOR INSTALLATION WHERE AIR CONDITIONER TROUBLE IS LIKELY TO
OCCUR...................................................................................................................... 3
ⅢINSTALLATION OF FLOOR AND CEILING TYPE INDOOR UNIT .............................. 3
1SPACE DIMENSION FOR INSTALLATION OF THE UNIT ............................................. 3
2IMPORTANT NOTICE ............................................................................................... 4
3THERE ARE 2STYLES OF INSTALLATION................................................................ 4
4ELECTRICAL WIRING.............................................................................................. 7
5INSTALL THE DRAINAGE PIPE ................................................................................. 9
6INSTALL THE CONNECTION PIPES ........................................................................ 10
ⅣCONSTITUTES AND NAMES OF EVERY PART OF FLOOR AND CEILING TYPE
INDOOR UNIT...................................................................................................... 11
ⅤWORKING TEMPERATURE RANGE .................................................................. 12
ⅥMAINTENANCE METHOD ............................................................................... 12
1CLEANING THE AIR FILTERS................................................................................. 12
2CLEANING THE UNIT ............................................................................................ 12
3AT THE START OF THE SEASON............................................................................ 13
4DURING THE OFF SEASON................................................................................... 13
ⅦOPERATING INSTRUCTIONS............................................................................ 14
ⅧMALFUNCTION ANALYZING ........................................................................... 16
1SERVICE CENTER ................................................................................................ 16
2AFTER-SALES SERVICE....................................................................................... 17

Unitary Duct Split Unitary Duct Split
1
ⅠSafety Information
Please read this manual carefully before use this unit, and operate it correctly
according to the guide in this manual.
Please take specially note to the meaning of these two marks：
Warning! This mark means that it may cause casualty or badly hurt if the
operation is incorrect.
Caution! This mark means that it may cause casualty or property loss if the
operation is incorrect.
Warning!
◆For the usage safety of the air conditioner, the units should be earthed
reliably .Do not connect the earth line with the gas pipe, water pipe, drainage pipe or
other places that specialized personnel considers unsafe.
◆Air conditioner must use special power supply circuit and switches for creepage
protect and air with enough capacity should be installed in the circuit.
◆Ensure that the connecting of power cord is normal, otherwise, electric shock or
fire may happened.
◆Do not cut off the power supply to turn off the unit when it is running, otherwise
life time of units may shortened.
◆Do not mangle wire or adopts wires that are not recommend to use, otherwise,
electric shock or fire may happened.
◆Please don’t operate the unit by wet hand, or electric shock may happened.
◆Don’t insert finger or stick like things into outlet vent, otherwise, damage may
be happened.
◆Cut down the main power switch immediately if malfunction (such as smell the
burning odor etc.) happen, and then contact the special engaged maintenance center.
If the abnormal state is maintained, the unit may be damaged or electric shock or fire
may be happened.
◆Do not refit the conditioner. Please contact the agency or professional
personnel to repair or move the conditioner.
◆Do not adopt fuse with unsuitable capacity or adopt iron thread instead of fuse,
otherwise malfunction or fire may happened.
◆Do cut off the main power supply of air conditioner if it would not be used for a
long time.

Unitary Duct Split Unitary Duct Split
2
◆Please turn off the main power of the whole unit before cleaning the conditioner,
otherwise electric shock or harm may be happened.
◆Chemical sprayer should be placed 1m or more away from the unit, otherwise
fire or explode may be caused.
◆Do not let blockage happened in the inlet or outlet vent of the air conditioner,
this would cause low efficacy or unit stop.

Unitary Duct Split Unitary Duct Split
3
ⅡSelection of Installation Location and
Precautions
1Selection of Installation Location for Air Conditioner
Unit
The installation of air conditioner unit must be in accordance with national and local
safety codes.
Installation quality will directly affect the normal use of air conditioner unit. The user
is prohibited from installation by himself. Please contact your dealer after buying this
machine. Professional installation workers will provide installation and test services
according to installation manual.
Do not connect to power until all installation work is completed.
2 Selection of Installation Location
＊Such a place where cool air can be distributed throughout the room.
＊Such a place where is condensation water is easily drained out.
＊Such a place that can handle the weight of indoor unit.
＊Such a place, which has easy access for maintenance.
＊Such a place where is permitting easy connection with the outdoor unit.
＊Such a place where is 1m or more away from other electric appliances such as
television, audio device, etc.
＊Avoid a location where there is heat source, high humidity or inflammable gas.
＊Do not use the unit in the immediate surroundings of a laundry, a bath, a shower
or a swimming pool.
＊Be sure that the installation conforms to the installation dimension diagram.
3 Caution for installation where air conditioner trouble is
likely to occur
＊Where there is too much of oil.
＊Where it is acid base area.
＊Where there is irregular electrical supply.
ⅢInstallation of Floor And Ceiling Type Indoor Unit
1 Space dimension for installation of the unit

Unitary Duct Split Unitary Duct Split
4
The space around the unit is adequate for ventilation. (Refer to Fig.1)
Fig.1
2 Important notice
a. The unit must be installed by the professional personnel according to this install
instruction to ensure the well use.
Please contact the local GIATSU special nominated repair department
before installation. Any malfunction caused by the unit that is installed by the
department that is not special nominated by GIATSU would not deal with on time by the
inconvenience of the business contact.
b. It should be done by professional personnel when the air conditioner unit is
moved to other place.
3 There are 2 styles of installation
＊Ceiling type
＊Floor type
Each type is similar to the other as follows:
a. Determine the mounting position on ceiling or wall by using paper pattern to
indicate indoor frame. Mark the pattern and pull out the paper pattern.(Refer to Fig.2)
b. Remove the return grill, the side panel and the hanger bracket from the indoor
unit as per procedure bellow.

Unitary Duct Split Unitary Duct Split
5
＊Press the fixing knob of the air intake grills, the grilles will be opened wider and
then pull them out from the indoor.
＊Remove the side panel fixing screw and pull to the front direction (arrow
direction) to remove. Side panel fixing screw. (Refer to Fig.3)
＊Loosen two hanger bracket setting bolts (M8) on eath side for less than 10mm.
Remove two hanger bracket fixing bolts (M6) on the rear side. Detach the hanger
bracker by pulling it backward (Refer to Fig.5).
Fig.2 Fig.3
c. Set the suspension bolt. (Use W3/8 or M10 size suspension bolts)
＊Adjust the distance from the unit to the ceiling slab beforehand. (Refer to Fig.4)
d. Fix the hanger bracket to the suspension bolt.
Warning！
＊Make sure that extended suspension bolt from the ceiling stays inside the
arrowed position. Readjust the hanger bracket when it is outside the arrowed position.
(Refer to Fig.6)
＊Suspension bolt stays inside the cap of indoor unit. Never remove the cap.
e. Lift the unit and slide forward unit the dent. (Refer to Fig.7)
f. Screw tightly both hanger bracket-setting bolts (M8). (Refer to Fig.5)
g. Screw tightly both hanger bracket-fixing bolts (M6) to prevent the movement of
the indoor unit. (Refer to Fig.5)
h. Adjust the height so that rear side of the drainpipe slightly inclines to improve
drainage.
Caution！
＊Adjust the height by turning the nut with a spanner.

Unitary Duct Split Unitary Duct Split
6
＊Insert the spanner from the hanger bracket opening. (Refer to Fig.8)
In case of hanging
It is possible to install using inward facing hanger brackets by not removing the
brackets from the indoor unit. (Refer to Fig.9)
Be sure to use only the specified accessories and parts for installation work.
When installing the indoor unit, you can refer the paper pattern for installation, and
make sure that the drainage side must be 10mm lower than the other side in order to
drain the condensation water fluently.
Model
A
B
H
C
D
1220
225
700
1158
280
GIA-MDI-012M01
GIA-MDI-018M01
GIA-MDI-024M01

Unitary Duct Split Unitary Duct Split
7
4 Electrical wiring
Caution: The power of every indoor unit should be connected in outdoor unit.
a. Open surface panel.
b. Remove the electrical box cover.
c. Route the power connection cord from the back of the indoor unit and pull it
toward the front through the wiring hole upward.
d. Connect the wiring (communication) through the piping hole of the chassis and
the bottom of the appliance upward, then connect the brown wire to the Terminal board
―3‖;black wire(the communication wire) to the Terminal board―2‖;blue wire to the
Terminal board―N(1)‖,and connect the earthing wire to the screw terminal on the electric
box. Clamp them with the corresponding wire clamp packed in the chassis.
e. Reassemble the electrical box cover.
f. Recover the surface panel.
g.The temperature of refrigerant circuit will be high, please keep the
interconnection cable away from the copper tube.
GWHD(42)NK3AO

Unitary Duct Split Unitary Duct Split
8

Unitary Duct Split Unitary Duct Split
9
GWHD(36)NK3AO
Caution！
①. The incorrect of wiring connecting would lead malfunction of some of the
electric elements.
②. Make sure that the lead between the connect end and the clamp end has some
need space after the wire is fixed.
③. The appliance shall be installed in accordance with national wiring regulations.
5 Install the drainage pipe
Make sure the drain flows out
a. Drain piping.
＊The drainpipe outlet direction can be chosen from either the right rear or right.
＊The diameter of the drainpipe should be equal to or greater than the diameter of
the connecting pipe.
＊Keep the drain pipe short and incline downwards at a gradient of at least 1/100
to prevent air pockets.(Refer to Fig.10)
＊Use the attached drain hose ④and clamp⑤.
＊Insert the drain hose completely into the drain socket. Tighten the clamp within
the range of gray tape until the screw head is less than 4mm from the hose. (Refer to
Fig.11,Fig.12)
＊Wrap the attached sealing pad over the clamp and drain hose to insulate.
(Refer to Fig.12)
＊No folding of drain hose inside the indoor unit. (Refer to Fig.13)
b. Confirm that smooth drainage is achieved after the piping work.
Pour 600cc of water into the drain pan from the air outlet for confirming
drainage.(Refer to Fig.14)

Unitary Duct Split Unitary Duct Split
10
Fig.10 Fig.11
Fig.12 Fig.13 Fig.14
6 Install the connection pipes
Connect the connect pipe with the two relative leading pipe, tie the nut on tie–in of
the connect pipe tightly.
Caution！
＊Be careful in bending the connection pipes, or you will damage the pipes.
＊If the tightening torque is too great in tightening the flare nut, leakage will
happen.
＊The temperature of refrigerant circuit will be high, please keep the
interconnection away from the copper tube.

Unitary Duct Split Unitary Duct Split
11
ⅣConstitutes and Names of Every Part of Floor
And Ceiling Type Indoor Unit
Suitable model:
GIA-MCF-12M01 GIA-MCF-18M01 GIA-MCF-24M01
Note:The appearances will be same by the different models of air conditioners.

Unitary Duct Split Unitary Duct Split
12
ⅤWorking Temperature Range
Working Temperature Range
Indoor side state
Outdoor side state
Dry bulb
temp. ℃
Wet bulb
temp.℃
Dry bulb
temp. ℃
Wet bulb
temp. ℃
Rated. Cooling
27
19
35
24
Max. cooling
32
23
48
26
Min. cooling
21
15
18
—
Rated. Heating
20
15
7
6
Max. heating
27
—
24
18
Min. heating
20
15
－15
－16
ⅥMaintenance Method
Warning!
①.Do turn off the unit and cut off the main power supply when cleaning the air
conditioner, otherwise electric shock may happened.
②.Do not make the air conditioner wet or electric shock may be lead; Ensure that
the air conditioner will not be cleaned by water rinsing under any circumstance.
③.Volatility liquid like thinner or gasoline would damage the appearance of air
conditioner. (So, only soft dry cloth and wet cloth moistened by neutral cleaning fluid
could be used to clean the surface panel of air conditioner.)
1 Cleaning the air filters
Warning!
Air filters should be cleaned by professionals with proper operation to ensure
personal safety.
2 Cleaning the unit
Clean the air conditioner and the remote control with dry cloth or a vacuum cleaner.
If damp cloth is used, remove moisture by using dry cloth afterward.

Unitary Duct Split Unitary Duct Split
13
3 At the start of the season
＊Check if there is blockage in inlet or outlet vent of air conditioner.
＊Check if the earth wire had earthed reliably by professional.
＊Check if the batteries in wireless remote controller had been exchanged.
＊Check if the air filter had been install well by professional.
＊In order to start up the air conditioner smoothly after long time’s turned off, turn
on the main power supply 8 hours before turning on the air conditioner.
＊Notice: all above should be operated by professional.
4 During the off season
＊Cut off the power supply main switch.
＊Clean the air filters and other parts by professional.
＊Leave the fan running for 2-3 hours to dry out the inside of the unit.
＊Notice: all above should be operated by professional.

Unitary Duct Split Unitary Duct Split
14
ⅦOperating Instructions

Unitary Duct Split Unitary Duct Split
15

Unitary Duct Split Unitary Duct Split
16
ⅧMalfunction Analyzing
Warning！
Do not repair air conditioner by yourself for the incorrect repair would lead electric
shock or fire. Please contact service center and had the unit repaired by specialized
personnel. Check the following item before contacting to repair could save your time
and cost.
Malfunction Phenomena
Malfunction Analyzing
The air conditioner can’t start up
just after turned off
The over load protect switch of the unit makes it runs after 3
mins delay
Odor gave out when the unit just
turned on
This is because when air conditioning, odors or cigarette smoke
from the room that was sucked in is discharged again.
Slight bicker was heard when the
unit is running
This is the sound for inner refrigerant flowing
Mist come from air outlet vent
when cooling
Indoor air is cooled rapidly
Creak sound is heard when
running or after run
The grating sound caused by expands of panel and other parts
for the change of temperature.
The air conditioner cannot run
Is power cut？
Is the power supply connected？
Is the circuit protector started aside？
Is the voltage too high or too low？
If TIMER had been set in wireless remote controller？
Notice :all above should be operated by professional
The cooling (heating) effect of
the air conditioner is not good
Is the temp. set in proper？
Is the inlet, outlet vent of outdoor unit blocked？
Is the air filter too dirty to cause blockage？
Are windows and doors closed？
Is air quantity set to Low speed？
Is there other heating resource in room？
Wireless remote controller
cannot control
＊Under the circumstance of changed batteries, the wireless
remote controller sometimes would appear the phenomena of
couldn’t control. Take out the back cover and press ‖ACL‖
button to make it normal.
＊The air conditioner is under abnormal disturbance
orchanging function too frequently, to make wireless remote
controller cannot control. Cut off main power switch and
re-electrify could resume normal operation.
Is the controller within the receiving area？Or is there
blockage？
Check if the voltages of batteries in wireless remotecontroller
are enough; Otherwise change the btteries.
1 Service center
When the following phenomena appeared, please stop operating immediately, cut
off main power supply of unit and contact service center for the conditioner.