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Multi V5
LG Multi V5 Service Manual
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9
Outdoor Unit Functions
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING
DIAGRAMS
ARUM072BTE5
208-230V Outdoor Units
10/6
8
10
Table of Contents
Table of Contents
3
Safety Precautions
4
Table of Symbols
4
Installation
4
Wiring
6
Operation
7
Safety Precautions
7
Heat Recovery Units (HRU)
8
Outdoor Units (ODU)
8
Unit Nomenclature
8
Outdoor Wiring Diagram
9
Wiring Diagrams
9
Wiring Diagrams
16
Heat Pump – Cooling Mode
17
Refrigerant Flow Diagrams
17
Heat Pump – Heating Mode
18
Heat Pump – Oil Return and Defrost Operation
19
Heat Pump – Lower HEX Defrost Operation
20
Heat Pump – Upper HEX Defrost Operation
21
Heat Recovery – Cooling Mode
27
Heat Recovery – Heating Mode
28
Heat Recovery – Cooling-Based Simultaneous Operation
29
Heat Recovery – Heating-Based Simultaneous Operation
30
Heat Recovery – Balanced Simultaneous Operation
31
Heat Recovery – Oil Return and Defrost Operation
32
Heat Recovery – Lower HEX Defrost Operation
33
Heat Recovery – Upper HEX Defrost Operation
34
Refrigerant Flow Diagrams
42
Basic Control
43
Compressor Control
43
Normal Operation
43
Outdoor Unit Functions
43
Avoiding Excessively High Discharge Temperatures
44
Main EEV Control
44
Master and Slave Outdoor Unit EEV Control
44
Subcooling EEV Control
44
Oil Return Control
45
Oil Return Control in Heating Mode
45
Oil Return in Cooling Mode
45
Special Control
45
Defrost Control
46
Defrost Control Stop Operation
46
Partial Defrost
46
Partial Defrost Control Stop Operation
46
Oil Equalizing Control
47
Special Control
47
Stop Operation Control
47
Stop Operation Control in Heating Mode
47
Pressure Control in Heating Mode
48
Pressure Protection Control
48
Discharge Temperature/Inverter Protection
49
Inverter Compressor Protection Control
49
Initial Setup
50
Other Controls
50
Auto Addressing Flowchart
52
Other Controls
53
Quick Control Setting
53
Troubleshooting a Failed Indoor Unit Auto Addressing Procedure
53
Setting the Optional Modes
54
Automatic Emergency Operation (Automatic Backup Function)
56
Emergency Operation
56
Manual Emergency Operation (Manual Backup Function)
56
Fault Detection Diagnosis (FDD) Checklist
57
Fault Detection Diagnosis (FDD) Codes
57
Refrigerant Auto Charge (Fd1 [Cooling], Fd2 [Heating])
58
Refrigerant Charge Procedure
59
Refrigerant Auto Judge (Fd3 [Cooling], Fd4 [Heating])
60
Integrated Test Run (ITR) (Fd7)
61
Cool/Heat Selector
64
Static Pressure Compensation Function (Fn2)
65
Night Low Sound Function (Fn3)
66
(Overall) Defrost Function (Fn4)
67
Outdoor Unit Addressing Function
67
Rapid Defrost
68
Snow Removal Assist/Rapid Defrost Function
68
Adjusting Indoor Unit Capacity (Fn7)
69
Adjusting Target Pressure (Fn8)
69
High Efficiency Function (Cooling Operation) (Fn10)
70
Low Ambient Kit Function (Fn9)
70
High Efficiency Function Operation (Auto Dust Throw Mode) (Fn11)
71
Smart Load Control (SLC) Function
72
Humidity Reference (Fn16)
73
Power Consumption Display (Fn21)
73
Drain Pan Heater (Optional) Function (Fn23)
74
Overall Defrost Operating in Low Temperatures (Heating) (Fn22)
74
Comfort Cooling (Id10)
75
Pump down (SE1, Pd)
76
Pump out (SE2, Po)
77
Pump out for Heat Recovery Systems
78
Pump out for Heat Pump Systems
79
Vacuum Mode (SE3, Vacc)
80
Forced Oil Return (SE5, 01)
81
Manual Back up for Inverter Compressor (SE4)
81
Forced Defrost (SE6, Def)
82
Cycle Data View (SE8)
83
Refrigerant Sound Reduction Mode
84
Fan Low Sound in Heating (SE11)
85
Number of Partial Defrosts (SE12)
85
Level Change of Error Code CH200 (SE14)
86
Auto Back up for Inverter Compressor
87
Setting Optional Modes
87
Heat Recovery Unit Parts Diagram
88
Heat Recovery Units Parts Functions
88
Dimensional Diagrams
89
PRHR022A Heat Recovery Unit
89
PRHR032A Heat Recovery Unit
90
Dimensional Diagrams
91
PRHR042A Heat Recovery Unit
91
Wiring Diagram
92
Refrigerant Circuit Diagram
93
Functions
94
Valve Control
94
Heat Recovery Units
95
Liquid Bypass Control
95
Oil Return/Defrost Control
95
Setting Outdoor Units in Dual/Triple Frame Systems
96
Setting Outdoor Units to Heat Pump or Heat Recovery System
96
PCB Settings
96
Outdoor Unit DIP Switch Settings
96
Heat Recovery Unit Settings
97
Addressing with Heat Recovery Units
97
Main Function of SW02M
98
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
98
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
99
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
100
SW05M Function (Rotary Switch for Addressing Heat Recovery Units)
101
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
101
Heat Recovery Unit Settings
102
Indoor Unit Auto Addressing Procedure
103
Indoor Unit Addressing
104
Auto Addressing for Pipe Detection
105
Pipe Detection Addressing
106
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
106
Manual Addressing for Pipe Detection
107
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
107
Manual Addressing for Pipe Detection Example (Non-Zone Setting)
108
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
108
Manual Addressing for Pipe Detection Example (Zone Setting)
109
Due to Our Policy of Continuous Product Innovation, some Specifications May Change Without Notification
109
Example of Checking the Valve Address
110
Identifying the Manual Valve Address
110
Pipe Detection Addressing
110
Test Run Checklist
111
Troubleshooting Main Components
111
Main Component Errors
112
Self Diagnostics Check
113
Run Self Diagnostics Check
113
Checking the Compressor
114
Checking the Outdoor Unit Fan Motor
115
Checking the Electronic Expansion Valves
116
Checking the Electronic Expansion Valves
118
Checking the Phase Diode Bridge
119
Checking the Inverter Compressor Phase Diode Bridge
119
Checking the Inverter Insulated-Gate Bipolar Transistor
120
Checking Intelligent Power Module (IPM)
120
Checking the Fan Intelligent Power Module (IPM)
121
Sensors and Outdoor Fan
122
Checking the High / Low Pressure Sensors
122
Checking the Outdoor Fan
122
Checking the Valves
123
Oil Return Solenoid Valve
123
Partial Defrost Solenoid Valve
123
Supercooled Bypass Valve
123
Checking the Four-Way Reverse Valve
124
Checking the Temperature Sensors
124
Error Code General Information
125
Error Code Tables
126
Error Code Display
126
Nomenclature Definitions
126
Error Nos. 01, 02, 06, and 17
136
Error No. 03
137
Error Codes
137
Error No. 04
138
Error No. 05
140
Error No. 09
141
Error No. 10
142
Dismantling/Servicing the Control Box and Inverter PCB
143
Error No. 21
144
Error No. 22
146
Error No. 23
148
Error No. 24
149
Error No. 25
150
Error No. 26
151
Error No. 29
153
Error Nos. 32 and 33
155
Error No. 34
156
Error No. 35
157
Error No. 36
158
Error No. 40
159
Error Nos. 41 and 47
160
Error Nos. 42 and 43
161
Error Nos. 44, 45, 46, 49, 153, and 154
162
Error No. 50
163
Error No. 51(1)
164
Error No. 51(2) (for Heat Recovery Systems Only)
165
Error No. 52
166
Error No. 53
168
Error No. 57
170
Error No. 60
171
Error No. 62
172
Error No. 65
173
Error No. 67
174
Error No. 75
176
Error No. 77
177
Error No. 79
178
Error No. 86
180
Error No. 87
181
Error No. 104
182
Error No. 105
185
Error No. 106
187
Error No. 107
189
Error Nos. 113, 114, and 115
190
Error No. 145
191
Error No. 150
192
Error No. 151
193
Error No. 182
196
Error No. 187
197
Error No. 193
198
Error No. 194
199
Error No. 2001
201
Error Nos. 201C, 202C, 203C
202
Error No. 204 C
203
Error No. 205 C
204
Error No. 206 C
205
Error No. 237
206
Error No. 238
207
Error No. 242
208
Replacing the Inverter PCB Heat Sink
209
Checking Input Voltage in Case of Power on
210
Checking Main PCB DC Voltage in Case of Power on
211
Checking Converter DC Link Voltage in Case of Compressor Operating
212
Case of Power on
213
Checking Inverter PCB in Case of Power off
214
Power System Wiring Diagram
215
PCB Locations
216
Outdoor Unit Parts
217
Main PCB
217
Pcbs
217
External PCB
218
Inverter PCB for 208-230V Outdoor Units (17Kw)
219
Inverter PCB for 208-230V Outdoor Units (12Kw)
220
Inverter PCB for 460V Outdoor Units (17Kw)
221
Inverter PCB for 460V Outdoor Units (12Kw)
222
Fan PCB
223
Noise Filter PCB for 208-230V Outdoor Units (17Kw)
224
Noise Filter PCB for 208-230V Outdoor Units (12Kw)
224
Noise Filter PCB for 460V Outdoor Units (17Kw)
225
Noise Filter PCB for 460V Outdoor Units (12Kw)
225
Pcbs - Expanded Internal View
226
Expanded Frame View for 6-Ton (Small Frame) Outdoor Units
229
Expanded Frame View for 8- and 10-Ton (Large Frame) Outdoor Units
230
Expanded Frame View for 12- to 20-Ton (Large Frame) Outdoor Units
231
Expanded Piping View
232
Expanded Piping View for 8- and 10-Ton (Large Frame) Outdoor Units
233
Expanded Piping View for 12- to 20-Ton (Large Frame) Outdoor Units
234
Parts
234
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LG Multi V5 Specifications
General
Brand
LG
Model
Multi V5
Category
Air Conditioner
Language
English
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