LG Multi V 5 Manuel

Trouble Shooting

Guide Book

2017

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Basic Part

Multi V 5

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2017

Trouble Shooting

Guide Book

Contents

Ⅰ. Basic Part

1 . U n i t C o n v e r s i o n 0 0 8

2. Temperature Vs. Pressure of Ref. 009

3. P-H Diagram_R410A 012

4. P-H Diagram_R134a 014

Ⅱ. Multi V 5 Introduction

1. Nomenclature 018

2. Line Up / Capacity 021

3. Piping Diagrams 025

4. Wiring Diagrams 054

Ⅲ. Trouble Shooting Guide

1. Checking Point

1. LGMV 064

2. Lack of Cooling 065

3. Lack of Heating 067

4. Check The Amount of Refrigerant 069

Cycle Changes by Amount of Refrigerant

073

2. Self-Diagnosis Function

1. Error Code Display 076

2. Error Code Check 080

3. Checking Method for Key Components

1. The Phenomena from Main

Component Failure 150

2. Compressor 151

3. EEV 156

4. Solenoid Valve 163

5. 4Way Valve 168

6. Check Valve (Outdoor EEV Check Valve) 169

7. Check Valve (Oil Separator) 169

8. Outdoor Fan & Fan Motor 170

9. Temperature Sensor 172

10. Pressure(High/Low) Sensor 173

11. Humidity Sensor 175

12. Pressure Switch 176

13. Main PCB 177

14. External PCB 179

15. Inverter PCB 181

16. Fan PCB 183

17. Communication PCB 185

18. Phase Bridge Diode 186

19. Inverter IGBT 187

20. Fan IPM 188

21. Central Controller PC Status 190

App. Service & Replace Method

of Control Box, Inverter PCB 194

Ⅳ. Function Control

1. Generation 4 Features 196

2. Function Control Setting 197

3. FDD Mode 200

4. Function Mode 210

5. SVC Mode 237

6. IDU Mode 253

Basic Part

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1. Un i t C o n vers i o n 008

2. Temperature Vs. Pressure of Ref. 009

3. P-H Diagram_R410A 012

4. P-H Diagram_R134a 014

Ⅰ. Basic Part

Basic Part

Multi V 5

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Saturation temperature vs. saturation pressure table for each refrigerant

Absolute pressure = Guage pressure(kPa) + 101.325(kPa)

kPa : kgf/㎠ x 101.97

kcal/h Btu/h (US) RT (Japan) RT kW HP Nominal HP

kcal/h 13.986 0.0003306 0.0003012 0.001162 0.00155 0.0004

Btu/h 0.252 10.0000833 0.0000759 0.000293 0.00039 0.0001

(US) RT 3,024 12,000 10.91 3.51628 4.69 1.251

(Japan) RT 3,320 13,174.6 1,097 13.861 5.149 1.373

kW 860 3,412 0.2843 0.259 11.333 0.3555

HP 640 2,559.5 0.213 0.1942 0.75 10.2667

Nominal HP 2,400 9,598.1 0.799 0.728 2.81 3.75 1

Pressure

kgf/㎠ bar Pa atm lbf/in2 (psi)

kgf/㎠ 10.98065 98,066.5 0.9678 14.2233

bar 1.0197 1100,000 0.9869 14.5028

Pa 0.0000102 0.00001 10.00001 0.000145

atm 1.0332 1.01325 101,325 114.6959

lbf/in2 (psi) 0.0703 0.06894 6894.7 0.068 1

Power

008 009

_TROUBLE SHOOTING GUIDE BOOK _

R410A

Temp. Relative pressure(kPaG) Relative pressure Temp.(℃)

℃Saturated

Liquid

Saturated

Gas kPaG Saturated

Liquid

Saturated

Gas

-30 169.62 168.91 170 -30.09 -30.02

-25 229.70 228.81 230 -25.08 -25.01

-20 299.57 298.46 300 -20.06 -19.99

-15 380.23 378.87 380 -15.09 -15.01

-10 472.75 471.09 470 -10.21 -10.12

-5 578.21 576.21 580 -4.98 -4.89

0 697.76 695.38 700 0.04 0.13

5 832.60 829.77 830 4.86 4.96

10 983.94 980.63 980 9.84 9.94

15 1153.09 1149.25 1150 14.88 14.98

20 1341.39 1336.98 1350 20.18 20.29

25 1550.25 1545.26 1550 24.98 25.08

30 1781.19 1775.59 1800 30.36 30.47

35 2035.78 2029.59 2000 34.30 34.42

40 2315.76 2309.03 2300 39.71 39.82

45 2623.00 2615.82 2600 44.62 44.73

50 2959.61 2952.13 2950 49.84 49.95

55 3328.02 3320.49 3400 55.91 56.01

60 3731.18 3724.00 3700 59.61 59.70

65 4173.11 4166.98 4200 65.28 65.34

70 4746.09 4706.31 4700 70.17 70.17

1. Unit Conversion 2. Temperature Vs. Pressure of Ref.

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Saturation temperature vs. saturation pressure table for each refrigerant

R134a

Temp. Pressure

℃kPa kgf/cm2

-25 5.58 0.06

-20 31.92 0.33

-15 63.12 0.64

-10 99.79 1.02

-5 142.54 1.45

0192.00 1.96

5248.85 2.54

10 313.79 3.20

15 387.53 3.95

20 470.81 4.80

25 564.42 5.76

30 669.11 6.82

35 785.74 8.01

40 915.13 9.33

50 1261.00 12.40

60 1579.24 16.10

70 2013.87 20.54

010 011

_TROUBLE SHOOTING GUIDE BOOK _

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6. P-h 선도

R410A

012 013

_TROUBLE SHOOTING GUIDE BOOK _

3. P-H Diagram_R410A

Basic Part

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014 015

_TROUBLE SHOOTING GUIDE BOOK _

4. P-H Diagram_R134a

140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560

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1. Nomenclature 018

2. Line Up / Capacity 021

3. Piping Diagrams 025

4. Wiring Diagrams 054

Ⅱ. Multi V 5 Introduction

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ARN ARUU NA E

4 5

G LTR T

PRHR

07 260

Model Generation

No. of Connected branches

02 : For 2 branches

03 : For 3 branches

04 : For 4 branches

Indicates that this is System

HR Unit using the R410A

018 019

_TROUBLE SHOOTING GUIDE BOOK _

1. Nomenclature

Model Generation Model Generation

E : High Efficiency

Air Discharge Type

T : Top Discharge

Electrical Ratings

B : 3Ø, 220V, 50Hz

D : 3Ø, 480V, 50Hz

L : 3Ø, 380-415V, 50Hz / 3Ø, 380V, 60Hz

Total Cooling Capacity in Horse Power(HP) unit

E X) 10HP → '100'

(For only 22, 24, 26HP)

In case of single unit → '220', '240', '260'

In case of series unit → '221', '241', '261'

Combination of Inverter Type and

for both heat pump / heat Recovery

M : Inverter for both Heat pump and Heat Recovery

Combination of Inverter Type and

Cooling Only or Heat Pump

U: DC Inverter and H/P and C/O

System with

Indoor Unit using R410A

System with

Outdoor Unit using R410A

Chassis Name

Total Cooling Capacity in Btu/h

EX) 5,000 Btu/h Class → '05' 18,000 Btu/h Class → '18'

Electrical Ratings

2:1Ø, 220V, 60Hz

6:1Ø, 220 - 240V, 50Hz

G:1Ø, 220 - 240V, 50Hz / 1Ø, 220V, 60Hz

Combinations of functions

A:Basic function

L:Neo Plasma(Wall Mounted)

C:Plasma(Ceiling Cassette)

G: Low Static

U : Floor Standing without Case

ART COOL Type Panel Color

SB/SC - R:Mirror V:Silver W:White

Z : Fresh Air Intake Unit

Multi V 5 Indoor Unit Multi V 5 Outdoor Unit

Multi V 5 HR Unit

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