LG ATNH126ELFB User manual

LG
Synchro
Air Conditioner
SERVICE MANUAL
LG
CAUTION
website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2Synchro Air Conditioner
Synchro Air Conditioner Service Manual
TABLE OF CONTENTS
Model Number Nomenclature......................................................................3
Safety Precautions .......................................................................................4
Model Names...............................................................................................11
External Appearance ..................................................................................12
Dimensions .................................................................................................13
Product Specifications...............................................................................22
Combination table ......................................................................................27
Installation...................................................................................................28
Operation ....................................................................................................63
Control Devices and Function...................................................................78
Schematic Diagram ....................................................................................91
Piping Diagrams .......................................................................................105
Troubleshooting Guide.............................................................................112
(3-way) Valve ............................................................................................133
Exploded View & Replacement Parts List ..............................................137

Service Manual 3
Model Number Nomenclature
Model Number Nomenclature
Indoor Unit
Outdoor Unit
A T N H 18 6 E L F B
Serial Number
Function
A : Basic
E : E/Grille
F : Plasma + Elevation grille
Panel type
Cassette L : Basic panel, W : Wooden panel
Duct : L
Chassis type
Cassette : E/F/D, Convertible : E/B, Duct : H/G/R
Electrical Rating
6 : 1Ø 220-240V ,50Hz
Nominal Cooling Capacity in Btu/h
Ex)18,000Btu/h '18', 24,000Btu/h '24'
Model Type
H : Heat Pump
Unit Type
N : Indoor Unit U : Outdoor Unit
Indoor Unit Type
T : Ceiling Cassette
V : Ceiling&Floor(Convertible)
B : Ceiling Concealed Duct
Refrigerent Type
A : R410A, L : R22
A U U H 100 8 0
Air Discharge Type
0 : Top discharge, A : Side discharge
Electrical Rating(Volt/Hertz/Phase)
1 : 115 / 60 / 1 2 : 220 / 60 / 1
3 : 208-230 / 60 / 1 5 : 200-220 / 50 / 1
6 : 220-240 / 50 / 1 8 : 380-415 / 50 / 3
Nominal Cooling Capacity in Btu/h
Ex)72,000Btu/h '72', 100,000Btu/h '100'
Model Type
W : DC Inverter Heat Pump(MPS Inverter)
H : Conventional Heat Pump(MPS Variable)
Unit Type
N : Indoor Unit, U : Outdoor Unit
Indoor Unit Type
2/3/4 : Multi Room, U : Universal, B : Duct, T : Cassette
Refrigerent Type
A : R410A, L : R22

Service Manual 11
Model Names
Model Names
Indoor Unit
Outdoor Unit
Branch Kit
TE
Ceiling Cassette 4-Way TF
TD
Ceiling & Floor(Convertible) VE
VB
BH
Ceiling Concealed Duct BG
BR
Model Name
Nominal Capacity[Btu/h(Kw)]
Chassis
Name
Type
12,000
(3.5)
18,000
(5.3)
24,000
(7.0)
30,000
(8.8)
36,000
(10.6)
48,000
(14.1)
60,000
(17.6)
ATNH126ELFB ATNH186ELFB - - - -
- - ATNH246FLFB ATNH306FLFB - -
- - - - ATNH366DLFB ATNH486DLFB ATNH606DLFB
AVNH126ELAB - - - - -
- AVNH186BLAB AVNH246BLAB AVNH306BLAB - -
- ABNH186HLAB ABNH246HLAB - - -
- - - ABNH306GLAB ABNH366GLAB -
- - - - - ABNH486RLAB ABNH606RLAB
Indoor Unit
MPS Inverter UY AUUW4860 AUUW6060 - -
UH AUUH488B - - -
MPS Variable UY - - AUUH 7280 -
UW - - - AUUH10080
Model Name
Nominal Capacity[Btu/h(Kw)]
Type Chassis
Name
48,000
(14.0)
60,000
(17.6)
72,000
(21.1)
100,000
(29.0)
Outdoor Unit
Name of accessory Model No. Indoor classification Capacity Ratio(%) Remark
PMUB11A "Synchro" Duo 50:50(1:1)
PMUB23A 40:60(2:3) Unbalance type
Branch Kit PMUB111A 33:33:33(1:1:1)
PMUB112A "Synchro" Trio 25:25:50(1:1:2) Unbalance type
PMUB122A 20:40:40(1:2:2) Unbalance type
PMUB1111A "Synchro" Quartet 25:25:25:25(1:1:1:1)

12 Synchro Air Conditioner
External Appearance
External Appearance
Indoor Unit
Outdoor Unit
Ceiling Cassette-4Way Ceiling & Floor(Convertible)
Ceiling Concealed Duct
ATNH126ELFB / ATNH186ELFB
ATNH246FLFB / ATNH306FLFB
ATNH366DLFB / ATNH486DLFB
ATNH606DLFB
AVNH126ELAB / AVNH186BLAB
AVNH246BLAB / AVNH306BLAB
ABNH186HLAB / ABNH246BHLAB
ABNH306GLAB / ABNH366BGLAB
ABNH486RLAB / ABNH606RLAB
AUUW4860 / AUUW6060
AUUH7280
AUUH488B
AUUH10080

Service Manual 13
Dimensions
Dimensions
Indoor Unit
CLOSE OPEN OPEN CLOSE
269
670
30
570
269
190.5
160
52
90 90
120.4 30 521
670 570
450
40
110 110
670
670
4
1
3
2
5
6
Unit:mm
570 Unit size
570 Unit size
450 (Hanging bolt)
7575
600 (Ceiling opening)
600 (Ceiling opening)
521(Hanging bolt) 39.5
39.5
1. Cassette Type - TE(12K/18K)
(unit : mm)
Number Name Descripition
1 Liquid pipe connection ø6.35 flare
2 Gas pipe connection 12k: ø9.52, 18k: ø12.7 flare
3 Drain pipe connection
4 Power supply connection
5 Air discharge grill
6 Air suction grill

14 Synchro Air Conditioner
Dimensions
2. Cassette Type - TF (24K/30K)
292
850
850
850
850
744 658
572
744
292
212
150
54
90 90
192 117
70
110 110
4
1
3
2
5
6
Unit:mm
744 Unit size
744 Unit size
658 (Hanging bolt)
6666
790 (Ceiling opening)
790 (Ceiling opening)
572(Hanging bolt) 109
109
30
(unit : mm)
Number Name Descripition
1 Liquid pipe connection ø6.35 flare
2 Gas pipe connection
24K: ø12.7, 30K: ø15.88 flare
3 Drain pipe connection
4 Power supply connection
5 Air discharge grill
6 Air suction grill

Service Manual 15
Dimensions
288
950
950
950
950
290
210.5
180
52
140
40
110
30
90 90
110
55
840
785
840
678
Fresh Air Inlet
Unit:mm
840 Unit size
840 Unit size
672 (Hanging bolt) 101.5101.5
875 (Ceiling opening)
875 (Ceiling opening)
785 (Hanging bolt) 45
45
4
5
6
1
3
2
(unit : mm)
Number Name Descripition
1 Liquid pipe connection 36K: ø6.35, 48K/60K: ø9.52 flare
2 Gas pipe connection 36K: ø15.88, 48K/60K: ø19.05 flare
3 Drain pipe connection
4 Power supply connection
5 Air discharge grill
6 Air suction grill
3. Cassette Type - TD(36K/48K/60K)

16 Synchro Air Conditioner
Dimensions
Ø12.7Ø6.3518k, 24k
Ø15.88Ø6.3530k
GasLiquidModel
1. Pipe Specification(mm)
Note:
1200
205
615
R
More than
20cm
More than eye-level
More than
20cm
R
(Ceiling installation)
R
More than
20cm
More than
20cm
(Floor/Wall installation)
(Rear Side)
(Unit: mm)
1076
Suspension bolt
(W3/8 or M10) Center-line for the
piping hole
265
1236 265
1076
more than
260
265
1236
392
265
468
63
Ø10 Stud Bolt hole
38
175
(Installation Plate)
250
128
36
36 1076
4. Ceiling & Floor(Convertible) - VB(18K/24K), VE(12K)

Service Manual 17
Dimensions
Top view
(unit: mm)
Front view
600600
Front
Inspection hole
※Suitable dimension "H" is necessary
to get a slope to drain as figure.
(600X600)
Control box
1000
H
l
i
h
j
k
A
H
CD
EF
B
(G) ab c d
K
J
fe
Ø12.7
Ø15.88
Ø6.35
Ø9.52
18, 24k
30, 36
Ø19.05
48, 60k
k
GasLiquidModel
1. Pipe Specification(mm)
Note:
C D E F (G) H J K a b c d e f h i j k l
355 45.5 450 30 87 750 163 260 61.5 243 212.3 243 110 130 52 66 81 30 158.5
355 45.5 450 30 87 830 186 298 229.5 243 232 243 116 160 53 59 81 19 158.5
477 56 590 30 120 1006 294 380 215 279 241 279 185 168 51 98 83 17 172
Capacity A B
932 882
1232 1182
1282 1230
ABNH186HLAB
ABNH246HLAB
ABNH306GLAB
ABNH366GLAB
ABNH486RLAB
ABNH606RLAB
(Unit: mm)
5. Ceiling Concealed Duct - BH(18K/24K), BG(30K/36K), BR(48K/60K)