LG Multi V 5 Manual

Trouble Shooting
Guide Book
2017
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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
5.
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
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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
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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
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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
04
4 5
2
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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