Gree GKH24S3GI User manual

Owner's Manual
Air Conditioners
Indoor unit Outdoor unit
Thank you for choosing Air Conditioners, please read this owner’s manual carefully before operation
and retain it for future reference.If you have lost the Owner’s Manual, please contact the local agent or
visit www.gree.com or sent email to [e-mail] or electronic version.
GREE reserves the right to interpret this manual which will be subject to any change due to product
improvement without further notice.
GREE Electric Appliances, Inc. of Zhuhai reserves the final right to interpret this manual.
GKH24S3GI
GUHD24NS3GO
GKH36S3GI
GUHD36NS3GO
GKH42S3GI
GUHD42NS3GO
GKH48S3GI
GUHD48NS3GO
DC Inverter U-match Series
Cassette Type Unit

Preface
For correct installation and operation, please read all instructions carefully. Before
reading the instructions, please be aware of the following items:
(1) For the safe operation of this unit, please read and follow the instructions
carefully.
(2) 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.
(3) Direct operators or maintainers should well keep this manual.
(4) If this unit fails to operate normally, please contact our service center as soon
as possible and provide the following information:
Content on the nameplate (model number, cooling capacity, production code,
ex-factory date).
Malfunction details (before and after the malfunction occurs).
(5) 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.
(6) All graphics in this manual is only for your reference. For sales or production
reasons, these graphics are subject to change by manufacturer without prior
notice.

Contents
1 Safety Precautions...................................................................................1
2 Outline of the Unit and Main Parts...........................................................3
3 Preparative for Installation .......................................................................4
3.1 Standard Accessory Parts.......................................................................4
3.2 Selection of the Installation Location ......................................................5
3.3 Connection Pipe Requirement................................................................7
3.4 Electrical Requirement............................................................................8
4 Installation of the Unit...............................................................................9
4.1 Installation of the Indoor Unit ..................................................................9
4.2 Installation of the Outdoor Unit ............................................................. 11
4.3 Installation of the Connection Pipe .......................................................13
4.4 Vacuum and Gas Leakage Inspection..................................................18
4.5 Installation of the Drain Hose................................................................20
4.6 The Panel Installation............................................................................24
4.7 Electrical Wiring ....................................................................................26
5 Installation of Controllers........................................................................32
6 Test Running ..........................................................................................33
6.1 Trial Operation and Testing...................................................................33
6.2 Working Temperature Range................................................................35
7 Troubleshooting and Maintenance.........................................................36
7.1 Troubleshooting.....................................................................................36
7.2 Routine Maintenance............................................................................37

DC Inverter U-match Series Cassette Type Unit
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1 Safety Precautions
WARNING!
This mark indicates procedures which, if improperly performed, might lead to
the death or serious injury of the user.
CAUTION!
This mark indicates procedures which, if improperly performed, might
possibly result in personal harm to the user, or damage to property.
WARNING!
(1). Installation should be left to the dealer or another professional. Improper installation may
cause water leakage, electrical shock, or fire.
(2). Install the air conditioner according to the instructions given in this manual. Incomplete
installation may cause water leakage, electrical shock, or fire.
(3). Be sure to use the supplied or specified installation parts. Use of other parts may cause the
unit to come to lose, water leakage, electrical shock, or fire.
(4). Install the air conditioner on a solid base that can support the weight of the unit. An inadequate
base or incomplete installation may cause injury in the event the unit falls off the base.
(5). Electrical work should be carried out in accordance with the installation manual and the
national electrical wiring rules or code of practice. Insufficient capacity or incomplete
electrical work may cause electrical shock or fire.
(6). Be sure to use a dedicated power circuit. Never use a power supply shared by another
appliance.
(7). For wiring, use a cable length enough to cover the entire distance with no connection. Do not
use an extension cord. Do not put other loads on the power supply, use a dedicated power
circuit. (Failure to do so may cause abnormal heat, electric shock or fire.)
(8). Use the specified types of wires for electrical connections between the indoor and outdoor
units. Firmly clamp the interconnecting wires so their terminals receive no external stresses.
Incomplete connections or clamping may cause terminal overheating or fire.
(9). After connecting interconnecting and supply wiring be sure to shape the cables so that they do
not put undue force on the electrical covers or panels. Install covers over the wires.
Incomplete cover installation may cause terminal overheating, electrical shock, or fire.
(10). If any refrigerant has leaked out during the installation work, ventilate the room. (The
refrigerant produces a toxic gas if exposed to flames.)
(11). After all installation is complete, check to make sure that no refrigerant is leaking out. (The
refrigerant produces a toxic gas if exposed to flames.)

DC Inverter U-match Series Cassette Type Unit
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(12). When installing or relocating the system, be sure to keep the refrigerant circuit free from
substances other than the specified refrigerant (R410A), such as air. (Any presence of air or
other foreign substance in the refrigerant circuit causes an abnormal pressure rise or rupture,
resulting in injury.)
(13). During pump-down, stop the compressor before removing the refrigerant piping. If the
compressor is still running and the stop valve is open during pump-down, air will be sucked in
when the refrigerant piping is removed, causing abnormal pressure in the freezer cycle which
will lead to breakage and even injury.
(14). During installation, attach the refrigerant piping securely before running the compressor. If the
compressor is not attached and the stop valve is open during pump-down, air will be sucked in
when the compressor is run, causing abnormal pressure in the freezer cycle which will lead to
breakage and even injury.
(15). Be sure to establish an earth. Do not earth the unit to a utility pipe, arrester, or telephone
earth. Incomplete earth may cause electrical shock, or fire. A high surge current from lightning
or other sources may cause damage to the air conditioner.
(16). Be sure to install an earth leakage breaker. Failure to install an earth leakage breaker may
result in electric shocks, or fire.
(17). 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.
(18). Children should be supervised to ensure that they do not play with the appliance.
(19). 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.
CAUTION!
(1). Do not install the air conditioner in a place where there is danger of exposure to inflammable
gas leakage. If the gas leaks and builds up around the unit, it may catch fire.
(2). Establish drain piping according to the instructions of this manual. Inadequate piping may
cause flooding.
(3). Tighten the flare nut according to the specified method such as with a torque wrench. If the flare
nut is tightened too hard, the flare nut may crack after a long time and cause refrigerant leakage.

DC Inverter U-match Series Cassette Type Unit
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2 Outline of the Unit and Main Parts
Fig. 2.1

DC Inverter U-match Series Cassette Type Unit
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3 Preparative for Installation
3.1 Standard Accessory Parts
The standard accessory parts listed below are furnished and should be used as
required. Table 3.1
Indoor Unit Accessories
No.
Name
Appearance
Q'ty
Usage
1
Drain Hose
1
To connect with the hard
PVC drain pipe
2
Nut with Washer
4
To fix the hook on the
cabinet of the unit.
3
Washer
10
To be used together with the
hanger bolt for installing the
unit.
4
installation
paperboard
1
used for ceiling drilling
5
Gasket mounting
board
4
Used to prevent gasket from
falling off
6
Wireless Controller
+Battery
1+2
To control the indoor unit
7
sealing plaster
1
8
Fastener
4
To fasten the sponge
9
Insulation
1
To insulate the gas pipe
10
Insulation
1
To insulate the liquid pipe

DC Inverter U-match Series Cassette Type Unit
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11
Sponge
4
To insulate the drain pipe
12
Nut
1
To connect gas pipe
13
Nut
1
To connect liquid pipe
14
Enswathement
2
Table 3.2
Outdoor Unit Accessories
No.
Name
Appearance
Q'ty
Usage
1
Drain Plug
2 or 3
To plug the unused drain
hole.
2
Drainage Connecter
or
1
To connect with the hard
PVC drain pipe
3.2 Selection of the Installation Location
WARNING!
The unit must be installed where strong enough to withstand the weight of the unit and fixed securely,
otherwise the unit would topple or fall off.
CAUTION!
①. Do not install where there is the danger of combustible gas leakage.
②. Do not install the unit near heat source of heat, steam, or flammable gas.
③. Children under 10 years old must be supervised not to operate the unit.
Decide the installation location with the customer as follows:

DC Inverter U-match Series Cassette Type Unit
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3.2.1 Indoor Unit
Select an installation site where the following conditions are fulfilled and that meets
your customer's approval.
Obstruct should be put away from the intake or outlet vent of the indoor unit so that
the airflow can be blown through all the room.
Make sure that the installation meets the requirement of the schematic diagram of
installation spaces.
Select the place where can stand 4 times of the weight of the indoor unit and would
not increase the operating noise and vibration.
The horizontality of the installation place should be guaranteed.
Select the place where is easy to drain out the condensate water, and connect with
outdoor unit.
Make sure that there are enough space for care and maintenance, and the height
fall between the indoor unit and ground is above 1800mm.
When installing the suspension bolt, check if the installation place can stand 4
times of the weight of the unit. If not, reinforce it before installation.
Note: There will be large amount of greasy dirt accumulated on the fan, heat
exchanger and water pump located in the dinning room and kitchen, which would
reduce the capacity of the heater exchanger, lead to leakage and abnormal operation
of the water pump.
>20mm(3/4inch)
≥1500mm
(59inch)
≥2500mm(98-3/8inch)
H
≥1500mm
(59inch)
Fig. 3.1
Table 3.3
Models
H(mm)
GKH24S3GI
260
GKH36S3GI
320
GKH42S3GI
GKH48S3GI

DC Inverter U-match Series Cassette Type Unit
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3.2.2 Outdoor Unit
WARNING!
①. Install the unit where it will not be tilted by more than 5°.
②. During installation, if the outdoor unit has to be exposed to strong wind, it must be fixed securely.
If possible, do not install the unit where it will be exposed to direct sunlight. (If
necessary, install a blind that does not interfere with the air flow.)
Install the outdoor unit in a place where it will be free from being dirty or getting wet
by rain as much as possible.
Install the outdoor unit where it is convenient to connect with the indoor unit.
Install the outdoor unit where the condensate water can be drained out freely
during heating operation.
Do not place animals and plants in the path of the warm air.
Take the air conditioner weight into account and select a place where noise and
vibration are small.
Install the outdoor unit where is capable of withstanding the weight of the unit and
generates as less noise and vibration as possible.
Provide the space shown in Fig. 3.2, so that the air flow is not blocked. Also for
efficient operation, leave three of four directions of peripheral constructions open.
＞500mm
(1-2/3feet)
＞2000mm
(6-5/9feet) ＞500mm
(1-2/3feet)
＞500mm
(1-2/3feet)
＞500mm
(1-2/3feet)
＞2000mm
(6-5/9feet)
＞1000mm
(3-2/7feet)
Fig. 3.2
3.3 Connection Pipe Requirement
CAUTION!
The maximum length of the connection pipe is listed in the Table below. Do not place the units between
which the distance exceeds the maximum length of the connection pipe.