DeLonghi GWHD18A1NK3EA User manual

Room Air Conditioner
SPLIT TYPE ROOM AIR CONDITIONER
Prior to installation, this air-conditioning unit must
be submitted for approval by the utility service
which provides electricity (EN 61000-3 Norm).
MODEL: GWHD18A1NK3EA
(Applied to new Refrigerant R-410A)
-BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
-ONLY FOR AUTHORIZED SERVICE PERSONNEL.
SERVICE MANUAL
CAUTION

Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions ...........................................................................................................................1
Dimensions .......................................................................................................................................6
Product Specifications ....................................................................................................................8
Installation.........................................................................................................................................9
Flaring work and connection of piping.........................................................................................11
Connecting the cable between indoor unit and outdoor unit.....................................................16
Checking the drainage and forming the pipings .........................................................................18
Air purging ......................................................................................................................................19
Test running....................................................................................................................................21
Functions.........................................................................................................................................22
Operation.........................................................................................................................................24
Disassembly....................................................................................................................................31
Schematic Diagram ........................................................................................................................38
Troubleshooting Guide ..................................................................................................................42

1Room Air Conditioner
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
Do not use damaged power cords, plugs, or a
loose socket. Always use the power plug and socket with the ground terminal.
• There is risk of fire of electric shock. • There is risk of electric shock.
Install the panel and the cover of control box
securely. Do not modify or extend the power cord.
• There is risk of fire of electric shock. • No grounding may cause electric shock.
■Installation

Service Manual 2
Safety Precautions
Do not install the product on a defective instal-
lation stand. Be sure the installation area does not deteriorate with age.
• It may cause injury, accident, or damage to the
product. • If the base collapses, the air conditioner could fall with it, causing property damage, product failure,
and personal injury.
• Sharp edges could cause injury. Be especially care-
ful of the case edges and the fins on the condenser
and evaporator.
• There is risk of fire, electric shock, explosion, or injury.
Be cautious when unpacking and installing the
product. For installation, always contact the dealer or an Authorized service center
For re-installation of the installed product,
always contact a dealer or an authorized ser-
vice center.
Do not install, remove, or re-install the unit by
yourself.
• There is risk of fire, electric shock, explosion, or
injury. • There is risk of fire, electric shock, explosion, or injury.

3Room Air Conditioner
Safety Precautions
■Operation
Do not turn the air-conditioner ON or OFF by
plugging or unplugging the power plug. Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock. • There is risk of fire or electrical shock.
Grasp the plug to remove the cord from the
outlet. Do not touch it with wet hands. Do not place a heater or other appliances near the power cable.
• There is risk of fire or electrical shock. • There is risk of fire and electric shock.
Do not allow water to run into electrical parts. Do not store or use flammable gas or com-
bustibles near the air conditioner.
• There is risk of fire, failure of the product, or electric
shock. • There is risk of fire or failure of product.

Service Manual 4
Always check for gas (refrigerant) leakage after
installation or repair of product. Install the drain hose to ensure that water is drained away properly.
• Low refrigerant levels may cause failure of product. • A bad connection may cause water leakage.
Keep level even when installing the product. Use two or more people to lift and transport
the air conditioner.
• To avoid vibration or water leakage. • Avoid personal injury.
■Installation
90˚
Unplug the unit if strange sounds, odors, or
smoke comes from it. Be cautious that water could not enter the product.
•There is risk of electric shock or fire. •There is risk of fire, electric shock, or product dam-
age.
Safety Precautions

5Room Air Conditioner
Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc. Do not touch the metal parts of the product when removing the air filter. They are very
sharp!
•There is risk of fire, electric shock, or damage to the
plastic parts of the product. •There is risk of personal injury.
Do not step on or put anyting on the product.
(outdoor units) Do not insert hands or other objects through the air inlet or outlet while the air conditioner
is plugged in.
•There is risk of personal injury and failure of product. •There are sharp and moving parts that could cause
personal injury.
■Operation
x
a
W
Safety Precautions

Service Manual 6
Dimensions
Dimensions
D
H
W
Installation plate
Wmm 907
Hmm 285
Dmm 231
Model
Dimension
18k Btu Series
Indoor Unit
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Symbols Used in this Manual

7Room Air Conditioner
W
L2
L3
1L
D
H
L5
Gas side
(3-way valve)
Liquid side
(2-way valve)
MODEL
DIM unit
Wmm 845
Hmm 680
Dmm 304
L1 mm 378
L2 mm 68
L3 mm 530
L4 mm 14
L5 mm 100
Dimensions
Outdoor Unit
18k Btu Series

Service Manual 8
Product Specifications
Product Specifications
Table-1
Model Name
Item Unit
W
MIN kcal/h.(W)
Btu/h.
W
Cooling Capacity Type kcal/h.(W)
Btu/h.
W
Max kcal/h.(W)
Btu/h.
W
MIN kcal/h.(W)
Btu/h.
W
Heating Capacity Type kcal/h.(W)
Btu/h.
W
Max kcal/h.(W)
Btu/h.
IN:20°C,Out: -10°C(Heater ON)
Btu/h.
IN:20°C,Out: -10°C(Heater OFF)
Btu/h.
Power Input Cooling W
Heating W
Heating(-10°C,Heater ON) W
Heating(-10°C,Heater OFF) W
Running Current Cooling A
Heating A
Heating(-10°C,Heater ON) A
Heating(-10°C,Heater OFF) A
COP Cooling W/W
Heating W/W
Power Supply V,Hz
Power Factor %
Air Circulation Indoor,Max m3/min(CFM)
Outdoor,Max m3/min(CFM)
Moisture Removal l/h.(pts/h.)
Noise Level Indoor,High dB(A)±3
(Sound Med. dB(A)±3
Pressure,1m) Low dB(A)±3
Outdoor,Max dB(A)±3
Refrigerant(R410A)Charge
Power Cord DXL
Connecting Cable DXL
Connecting Tube Liquid Side mm(in)
(Ø. Socket Flare) Gas Side mm(in)
Length,std m(in)
Drain Hose (O.D , I.D) mm(in)
Indoor mm
Dimension inch
(W*H*D) Outdoor mm
inch
Net Weight Indoor kg(lbs)
Outdoor kg(lbs)
1314
1130
4483
4920
4232
16787
5171
4447
17643
1326
1140
4526
5740
4937
19585
6318
5434
21557
-
-
1728
2140
-
-
7.53
9.36
-
-
2.85
2.68
240/50
98
800
-
2
47
45
42
57
1600
1.5mm2
1.5mm2
6.35(1/4)
12(1/2)
5(127)
21.5,16.0(0.85,0.63)
907X290X231
35.7X11.4X9.1
840X675X304
33.1X26.6X12.0
13(29)
52(115)
GWHD18A1NK3EA