LG Multi V 5 Manual

Trouble Shooting
Guide Book
2017
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Basic Part
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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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ARN H A 2G K210
Model Generation
Combination of Inverter Type and
Cooling Only or Heat Pump
U : DC Inverter and H/P and C/O
H : Hydro Kit
System with
Indoor Unit using R134a
Chassis Name
Total Heating Capacity in Horse Power(HP) unit
EX) 8HP → 08' 10HP → '10'
Electrical Ratings
1: 1Ø, 115V, 60Hz 2: 1Ø, 220V, 60Hz
6: 1Ø, 220 - 240V, 50Hz 7: 1Ø, 100V, 50/60Hz
3: 1Ø, 208/230V, 60Hz
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
SE/S8 - R: Mirror V: Silver B: Blue
SF - E: Red V: Silver G: Gold 1: Kiss (Photo changeable)
Q: Console
Z: Fresh Air Intake Unit
Multi V Hydro Kit Multi V 5 Indoor Unit
020 021
_TROUBLE SHOOTING GUIDE BOOK _
2. Line Up / Capacity
Category Chassis
Name
Capacity(Btu/h(kW))
5k
(1.6)
7k
(2.2)
9k
(2.8)
12k
(3.6)
15k
(4.5)
18k
(5.6)
21k
(6.2)
24k
(7.1)
28k
(8.2)
30k
(9.0)
36k
(10.6)
42k
(12.3)
48k
(14.1)
54k
(15.8)
76k
(22.4)
96k
(28.0)
Wall
Mounted
Unit
Standard
SB ● ● ● ● ●
SC ● ●
SV ● ●
ART
COOL
Mirror SB ● ● ● ● ●
SC ● ●
Gallery SF ●●●
Ceiling
Cassette
1 Way TU ●●●
TT ● ●
2 Way TL ● ● ● ●
4 Way
TR ● ● ● ●
TQ ● ● ●
TP ● ● ●
TN ● ● ● ●
TM ● ● ● ●
Ceiling
Concealed
Duct
High
Static
BG ● ● ●
BR ● ●
B8 ● ●
High
Sensible
BG ● ● ● ●
BR ● ● ●
B8 ● ● ●
Middle
Static
M1 ●●●●● ●
M2 ● ● ●
M3 ● ●
Low Static
L1 ● ● ●
L2 ●●●
L3 ● ●
Bulit In
(Low Static)
B3 ●●●●
B4 ● ●
Floor
Standing
With Case CE ● ● ● ●
CF ● ●
Without
Case
CE ● ● ● ●
CF ● ●
Console QA ● ● ● ●
Frash Air Intake Unit BR ●
B8 ● ●
Category Chassis
Name
Capacity(Btu/h(kW))
9k(2.8) 15k(4.5)
Ceiling cassette 4 Way TR ○ ○
※ In matters of combination with Outdoor unit system, refer the PDB of that outdoor units.
※ This product contains Fluorinated Greenhouse Gases.(R410A)
■ Standard Model
■ Compact Model
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022 023
_TROUBLE SHOOTING GUIDE BOOK _
실외기 실외기 Multi V 5 Outdoor Unit Multi V 5 Combination of Outdoor Unit
CHASSIS Model Name Capacity(kW) Model
UXA
ARUM080LTE5
ARUM100LTE5
ARUM120LTE5
22.4
28.0
33.6
UXB
ARUM140LTE5
ARUM160LTE5
ARUM180LTE5
ARUM200LTE5
ARUM220LTE5
ARUM240LTE5
ARUM260LTE5
39.2
44.8
50.4
56.0
61.6
67.2
72.8
UXA
UXA
ARUM221LTE5
ARUM241LTE5
61.6
67.2
UXA
UXB
ARUM261LTE5
ARUM280LTE5
ARUM300LTE5
ARUM320LTE5
ARUM340LTE5
ARUM360LTE5
72.8
78.4
84.0
89.6
95.2
100.8
UXB
UXB
ARUM380LTE5
ARUM400LTE5
ARUM420LTE5
ARUM440LTE5
ARUM460LTE5
ARUM480LTE5
106.4
112.0
117.6
123.2
128.8
134.4
UXB
UXB
UXA
ARUM500LTE5
ARUM520LTE5
ARUM540LTE5
ARUM560LTE5
ARUM580LTE5
ARUM600LTE5
140.0
145.6
151.2
156.8
162.4
168.0
UXB
UXB
UXB
ARUM620LTE5
ARUM640LTE5
ARUM660LTE5
ARUM680LTE5
ARUM700LTE5
ARUM720LTE5
173.6
179.2
184.8
190.4
196.0
201.6
UXB
UXB
UXB
UXB
ARUM860LTE5
ARUM880LTE5
ARUM900LTE5
ARUM920LTE5
ARUM940LTE5
ARUM960LTE5
240.8
246.4
252.0
257.6
263.2
268.8
UXB
UXB
UXB
UXA
ARUM740LTE5
ARUM760LTE5
ARUM780LTE5
ARUM800LTE5
ARUM820LTE5
ARUM840LTE5
207.2
212.8
218.4
224.0
229.6
235.2
Model Name Number
of Units
Module(HP)
810 12 14 16 18 20 22 24 26
ARUM080LTE5 1 1
ARUM100LTE5 1 1
ARUM120LTE5 1 1
ARUM140LTE5 1 1
ARUM160LTE5 1 1
ARUM180LTE5 1 1
ARUM200LTE5 1 1
ARUM220LTE5 1 1
ARUM221LTE5 2 1 1
ARUM240LTE5 1 1
ARUM241LTE5 2 2
ARUM260LTE5 1 1
ARUM261LTE5 2 1 1
ARUM280LTE5 1 1 1
ARUM300LTE5 2 1 1
ARUM320LTE5 2 1 1
ARUM340LTE5 2 1 1
ARUM360LTE5 2 1 1
ARUM380LTE5 2 1 1
ARUM400LTE5 2 1 1
ARUM420LTE5 2 1 1
ARUM440LTE5 2 1 1
ARUM460LTE5 2 1 1
ARUM480LTE5 2 2
ARUM500LTE5 3 1 1 1
ARUM520LTE5 3 1 1 1
ARUM540LTE5 3 1 1 1
ARUM560LTE5 3 1 1 1
ARUM580LTE5 3 1 1 1
ARUM600LTE5 3 1 1
ARUM620LTE5 3 1 2
ARUM640LTE5 3 1 2
ARUM660LTE5 3 1 2
ARUM680LTE5 3 1 2
ARUM700LTE5 3 1 2
ARUM720LTE5 3 1 2
ARUM740LTE5 4 3
ARUM760LTE5 4 1 1 2
ARUM780LTE5 4 1 1 2
ARUM800LTE5 4 1 1 2
ARUM820LTE5 4 1 1 2
ARUM840LTE5 4 1 3
ARUM860LTE5 4 1 3
ARUM880LTE5 4 1 3
ARUM900LTE5 4 1 3
ARUM920LTE5 4 1 3
ARUM940LTE5 4 1 3
ARUM960LTE5 4 4
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024 025
_TROUBLE SHOOTING GUIDE BOOK _
HR Unit
Multi V Hydro Kit
8 / 10 / 12 / 14 / 16 HP (1 Comp)
Type Model Chassis Capacity
(Btu/h(kW))
Hydro Kit
(For high Temperature) ARNH08GK3A2
K3
75k(25.0)
Model Chassis Branches Number
PRHR022 2
PRHR032 3
PRHR042 4
Type Model Chassis Capacity
(Btu/h(kW))
Hydro Kit
(For Medium Temperature)
ARNH10GK2A2
K2
96k(28.0)
ARNH04GK2A2 42k(12.3)
50
Multi V 5 Outdoor Units
3. Piping Diagrams
3.1 8 / 10 / 12 / 14 / 16 HP (1 Comp)
3.1.1 Heat Recovery System
Cooling Operation







HR unit
EEV
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor HEX
Indoor HEX
Indoor HEX
Indoor HEX
Fan
Fan
Fan
Fan
EEV
EEV
EEV







M
M
Fan
Motor
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
SC
EEV
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer




*14,16HP have 2fans.
Heat Recovery System
■ Cooling Operation
3. Piping Diagrams
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026 027
_TROUBLE SHOOTING GUIDE BOOK _
3. Piping Diagrams
51
Multi V 5 Outdoor Units
Heating Operation













HR unit
EEV







t
Heatsink
SC
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Low Pressure Vapor Pipe
Liquid Pipe
Liquid Pipe
Temperature Sensor
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Active
Path
Comp 1
Vapor
Injection
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
High / Low Pressure Vapor Pipe
Multi V 5
3. Piping Diagrams
52
Outdoor Units
Oil Return/ Defrost Operation













HR unit







t
SC
EEV
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
y
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
h
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV SC
Suction
Oil Return
Active
Path
Receiver
Inlet
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
Heatsink
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
High / Low Pressure Vapor Pipe
■ Heating Operation ■ Oil Return/ Defrost Operation
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028 029
_TROUBLE SHOOTING GUIDE BOOK _
Multi V 5
3. Piping Diagrams
54
Outdoor Units
Heating-based Simultaneous Operation













HR unit







SC
EEV
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
High / Low Pressure Vapor Pipe
3. Piping Diagrams
53
Multi V 5 Outdoor Units
Cooling-based Simultaneous Operation













HR unit







SC
EEV
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
High / Low Pressure Vapor Pipe
■ Heating-based Simultaneous Operation■ Cooling-based Simultaneous Operation
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
Back
Basic PartBasic PartBasic PartBasic Part

030 031
_TROUBLE SHOOTING GUIDE BOOK _
Multi V 5
3. Piping Diagrams
56
Outdoor Units
Upper HEX Defrost Operation







SC
EEV
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV SC
Suction
Oil Return
Heatsink
Active
Path
Receiver
Inlet
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor













HR unit
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
High / Low Pressure Vapor Pipe
3. Piping Diagrams
55
Multi V 5 Outdoor Units
Balanced Simultaneous Operation













HR unit







SC
EEV
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
High / Low Pressure Vapor Pipe
■ Upper HEX Defrost Operation■ Balanced Simultaneous Operation
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
Back
Basic PartBasic PartBasic PartBasic Part

032 033
_TROUBLE SHOOTING GUIDE BOOK _
3. Piping Diagrams
57
Multi V 5 Outdoor Units
Low HEX Defrost Operation







Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
SC
EEV
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
tt
Fan
Motor













HR unit
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
■ Low HEX Defrost Operation
Multi V 5
3. Piping Diagrams
58
Outdoor Units
3.1.2 Heat Pump System
Cooling Operation
tt







SC
EEV
EEV
tnU Gr oodn pi nU Gr oodn I
Indoor HEX EEV Indoor HEX
Fan Fan
t
t
Fan
Motor
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
sGw
{Gz
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
o
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
Heat Pump System
■ Cooling Operation
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
Back
Basic PartBasic PartBasic PartBasic Part

034 035
_TROUBLE SHOOTING GUIDE BOOK _
Multi V 5
3. Piping Diagrams
60
Outdoor Units
Oil Return/ Defrost Operation







Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
tt
SC
EEV
EEV
Indoor Unit Indoor Unit
Indoor HEX EEV
Indoor HEX
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
Fan Fan
3. Piping Diagrams
59
Multi V 5 Outdoor Units
Heating Operation
t t







SC
EEV
EEV
Indoor Unit Indoor Unit
Indoor HEX EEV
Indoor HEX
Fan Fan
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
■ Oil Return/ Defrost Operation■ Heating Operation
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
Back
Basic PartBasic PartBasic PartBasic Part

036 037
_TROUBLE SHOOTING GUIDE BOOK _
Multi V 5
3. Piping Diagrams
62
Outdoor Units
Low HEX Defrost Operation







tt
SC
EEV
EEV
t i nU Gr oodn It i nU Gr oodn I
Indoor HEX EEV
Indoor HEX
Fan Fan
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
3. Piping Diagrams
61
Multi V 5 Outdoor Units
Upper HEX Defrost Operation







tt
SC
EEV
EEV
iUGoodn Ii nU oodn I
Indoor HEX EEV Indoor HEX
Fan Fan
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Comp 1
Discharge
Temperatue Sensor
Oil Separator
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1
Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
*14,16HP have 2fans.
■ Low HEX Defrost Operation■ Upper HEX Defrost Operation
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
Back
Basic PartBasic PartBasic PartBasic Part

038 039
_TROUBLE SHOOTING GUIDE BOOK _
Multi V 5
3. Piping Diagrams
64
Outdoor Units
Heating Operation













HR unit








EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
EEV
Indoor Unit
Indoor HEX
Fan
t
t
Fan
Motor
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Oil
Balance
Oil
Balance
Comp 1
Discharge
Temperatue Sensor
Comp 2
Discharge
Temperatue Sensor
rotarapeSGl iOrotarapeSGl iO
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Inverter
Comp 2
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
SC
EEV
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1 Vapor
Injection
Comp 2 Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
■ Heating Operation
18 / 20 / 22 / 24 / 26HP (2 Comp)
3. Piping Diagrams
63
Multi V 5 Outdoor Units
3.2 18 / 20 / 22 / 24 / 26HP (2 Comp)
3.2.1 Heat Recovery System
Cooling Operation













HR unit








EEV
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor HEX
Indoor HEX
Indoor HEX
Indoor HEX
Fan
Fan
Fan
Fan
EEV
EEV
EEV
t
Outdoor
Temperature
Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor Unit HEX
Temperature Sensor
Outdoor
Unit HEX
Temperature
Sensor
Low Hot
Vapor Valve
Sub 4-Way Valve
High Pressure
Sensor
Main 4-Way
Valve
Suction
Temperature
Sensor
Receiver
Receiver
Outlet
Low
Pressure Sensor
Oil
Balance
Oil
Balance
Comp 1
Discharge
Temperatue Sensor
Comp 2
Discharge
Temperatue Sensor
rtaaeS G Orotr apSGlO
Liquid Pipe
Temperature Sensor
Low Pressure Vapor Pipe
High / Low Pressure Vapor Pipe
Liquid Pipe
Inverter
Comp 1
Inverter
Comp 2
Sub-Cooling Circuit
Outlet Temperature Sensor
Sub-Cooling HEX
Sub-Cooling Circuit Inlet
Temperature Sensor
SC
EEV
Accum
Pressure Switch
Upper Hot
Vapor Valve
Upper Outdoor EEV
Low Outdoor
EEV Receiver
Inlet
SC
Suction
Oil Return
Heatsink
Active
Path
Comp 1 Vapor
Injection
Comp 2 Vapor
Injection
Pressure Sensor
Pressure Switch
Temperature Sensor
Remarks
SVC Valve
Check Valve
EEV
Solenoid Valve
Strainer
t
Fan
Motor
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
High Temperature High Pressure Liquid (Conditional)
Low Temperature Low Pressure Vapor
Heat Recovery System
■ Cooling Operation
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
Back
Basic PartBasic PartBasic PartBasic Part