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multi V PLUS
LG multi V PLUS Service Manual
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Ser
vice Manual
155
Dimensional Dra
wings
5. Dimensional Dra
wings
Model
LRNV096SP*0/LRNN096SP*0/LRNV092SP*0/LRNN092SP*0
LRNV126SP*0/LRNN126SP*0/LRNV122SP*0/LRNN122SP*0
W
570
H
568
D
137
LRNV096SP*0/LRNN096SP*0/LRNV092SP*0/LRNN092SP*0
LRNV126SP*0/LRNN126SP*0/LRNV122SP*0/LRNN122SP*0
Pipe Hole
Fix Hole
Hanger Hole
H
W
D
More than 10cm
Lower than 2.3m
More than
50cm
More than 2m
or Higher than eye-level
More than
50cm
125
320
84
97
6
137
38
570
423
11
4-R
15
568
498
320
114
108
505
568
112
1
154
156
Table of Contents
Air Conditioner
1
Service Manual
1
Table of Contents
2
Safety Precautions
3
General Information
10
Model Names
11
Indoor Unit
11
Outdoor Unit
11
External Appearance
12
Indoor Unit
12
Outdoor Unit
13
Combination of Outdoor Units
14
Nomenclature
15
Indoor Unit
15
Outdoor Unit
15
Outdoor Units Information
16
Heat Pump
17
Cooling Only
18
Outdoor Units
18
Indoor Units
21
Ceiling Mounted Cassette Type (1Way)
22
Indoor Units Specifications
23
Indoor Unit Functions
27
Operation Details
28
Cooling Mode Operation
28
Time Delay Safety Control
28
Air-Filter Checking Control
28
Heating Mode Operation
29
Hot-Start Control
29
Dimensional Drawings
30
Piping Diagrams
31
Wiring Diagrams
32
Ceiling Mounted Cassette Type (4 Way)
33
Specifications
34
Functions
46
Operation Detail
47
Dimensional Drawings
49
Piping Diagrams
51
Heat Exchanger
51
Wiring Diagrams
52
Ceiling Concealed Duct Type (High Static)
53
Specifications
54
Functions
66
Operation Details
67
Dimensional Drawings
69
Piping Diagrams
70
Wiring Diagrams
71
Ceiling Concealed Duct Type (Low Static)
75
Specifications
76
Functions
80
Operation Details
81
Dimensional Drawings
83
Front View
83
Piping Diagrams
84
Wiring Diagrams
85
Convertible Type
87
Specification
88
Functions
92
Operation Details
93
Airflow Direction Control
93
Soft Dry Operation
97
Forced Operation
97
Test Operation
98
Display Function
99
Dimensional Drawings
100
Piping Diagrams
101
Wiring Diagrams
102
Indoor Unit Disassembly
103
Disassembly of the Parts
103
Wall Mounted Type
107
Specification
108
Functions
112
Operation Details
113
Dimensional Drawings
118
Piping Diagrams
119
Wiring Diagrams
120
Disassembly of the Parts
121
Art Cool Type (Deluxe)
123
Specification
124
Functions
128
Healthy Dehumidification Mode
129
Operation Details
129
Defrost Control
130
Fuzzy Operation
131
Airflow Speed Selection
132
On-Timer Operation
132
Off-Timer Operation
132
Sleep Timer Operation
132
Chaos Swing Mode
133
Chaos Natural Wind Mode
133
Jet Cool Mode Operation
133
Forced Operation
133
Air Cleaner Operation
134
Protection of the Evaporator Pipe from Frosting
134
Display Luminosity
134
Buzzer Sounding Operation
134
Display Function
135
Dimensional Drawings
136
Piping Diagrams
137
Wiring Diagrams
138
Disassembly of the Parts
139
Art Cool Type
143
Specification
144
Functions
148
Operation Details
149
Sleep Timer Operation
152
Display Function
154
Dimensional Drawings
155
Piping Diagrams
156
Wiring Diagrams
157
Disassembly of the Parts
158
Art Cool Type (Wide)
161
Specification
162
Functions
166
Operation Details
169
Display Function
173
Dimensional Drawings
174
Piping Diagrams
175
Wiring Diagrams
176
Disassembly of the Parts
177
Outdoor Units
179
Outdoor Unit - LRUV/LRUN Series
180
Outdoor Unit Specifications
181
Outdoor Unit Function
203
Basic Control
204
Compressor Control
204
Main and Sub Unit's LEV Control
204
Normal Operation
204
Fan Control
205
Oil Return Control on Cooling Mode
205
Subcooling LEV Control
205
Oil Return Control on Heating Mode
206
Compressor Stage During Oil Return Control
207
Oil Equalizing Control on Cooling Mode
208
Oil Equalizing Control on Heating Mode
209
Equalizing Control of Compressors
210
Stopping Operation on Cooling Mode
211
Stopping Operation on Heating Mode
211
Stopping Operation of Sub Units When Only Main Unit Operates
212
Pressure Control on Cooling Mode
213
Protection Control
213
Pressure Control on Heating Mode
214
Discharge Temperature Control
215
Inverter Protection Control
216
Phase Detection
216
Pressure Switch
216
Auto Addressing
217
Communication Check
217
Initial Setup
217
PCB Error Check
217
Controls for Error Occurrence
218
Ct(Current Transformer) Sensor Fault Error
218
DC Peak Control
218
Over Upper Limit Voltage and below Lowest Limit Voltage
218
Outdoor Unit Dimensions
219
Piping Diagrams - Outdoor Unit
223
Refrigerant Flow for each Operation Mode
223
Heating Operation
224
Cooling Operation
226
Wiring Diagrams (Outdoor Unit)
232
PCB Views
242
Trouble Shooting Guide
245
Troubleshooting Guide
246
The Phenomena from Main Component Failure
247
Checking Method for Key Fompornents
248
Compressor Check
248
Fan Motor Check
249
Linear Empansion Valve Check
250
LEV Failure Check Method
252
3Phase Bridge Diode Check
253
IPM (Integrated Power Module) Check
254
Electrolytic Capacitor and Resistor for Voltage Distribution
255
Self-Diagnosis Function
256
Error Indicator
257
Failure Checking Method
262
Fault Diagnosis and Trouble Shooting Guide
262
Communication Error between Wired Remote Controller and Indoor Unit
263
Drain Pump Error
264
Communication Error between Outdoor Unit and Indoor Unit
265
Different Operation Mode between Indoor Units
266
Occurence of Excessive Current in Inverter Compressor
267
Maximum over Current (MAX CT) or Minimum Current
268
DC Link Voltage for Inverter Compressor Drive
269
High Pressure Switch of Outdoor Unit
270
Low Voltage/High Voltage
271
Discharge Temperature
272
High Pressure Rise
273
Low Pressure Drop
274
Sensor Error
275
Excessive Capacity of Indoor Units
276
Communication Error (Inverter PCB - Main PCB)
277
Communication Error (Indoor Unit - Main PCB)
278
3-Phase Wrong Wiring
279
Heatsink of Inverter Compressor
280
Communication Error between Outdoor Units
281
Communication Error between Main PCB and Fan PCB
282
Over-Current of Outdoor Unit Fan Motor (IPM Fault)
283
Low Voltage of Main Outdoor Unit Fan Motor
284
4Way Valve
285
Compressor Troubles
286
Outdoor Unit LEV Troubles
287
Excessive Cold LEV
288
Way Valve
289
Check Valve (Parallel Connected Check Valve in Outdoor Unit)
290
Hot Gas Bypass Valve
291
Constant Speed Outdoor Unit Fan
292
Liquid Injection Valve
292
Cooling Fan Check
293
Inverter Outdoor Unit Fan Check
293
High/Low Pressure Sensor Check
294
Thermistor Check
294
Pressure Switch Check
295
Appendix
297
Position of the LED01Y in Inverter Board
298
Resistance-Temperature Table
299
Low Pressure Sensor
301
Voltage-Pressure Table
301
High Pressure Sensor
302
Exploded View & Replacement Parts List
303
Exploded View & Replacement Parts List
304
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LG multi V PLUS Specifications
General
Brand
LG
Model
multi V PLUS
Category
Air Conditioner
Language
English
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