KOREL M2OC-18HFN8-Q User manual

SERVICE MANUAL
TEHNIČKI PRIRUČNIK
KOREL AIRCONDITIONER
EUROPE MARKET
SUPER DC INVERTER MULTI TYPE
M2OG-14HFN8-Q = X
M2OC-18HFN8-Q = K20C-18FN8 = K20C-18HFN8
M2OD-18HFN8-Q =x
M3OF-21HFN8-Q = K30-21FN8
M3OF-27HFN8-Q = K30-27FN8 = K30-37HFN8
M3OE-27HFN8-Q = x
M4OB-36HFN8-Q = K40-36HFN8
M5OD-42HFN8-Q = K50-42FN8
M4OE-28HFN8-Q = X
DC MULTI OUTDOOR UNITS

1
CONTENTS
1. General information of Outdoor Units..................................2
2. Features..................................................................................3
3. Dimensions.............................................................................4
4. Refrigeration Cycle Diagram.................................................5
5. Wiring diagram.......................................................................7
6. Indoor units combination....................................................14
7. Sound Levels........................................................................16
8. Installation Details ...............................................................17
8.1 Wrench torque sheet for installation........................................................................... 17
8.2 Connecting the cables................................................................................................ 17
8.3 Pipe length and the elevation..................................................................................... 17
8.4 Installation for the first time......................................................................................... 18
8.5 Adding the refrigerant after running the system for many years................................ 21
8.6 Re-installation while the indoor unit need to be repaired........................................... 22
8.7 Re-installation while the outdoor unit need to be repaired......................................... 24
9. Electronic control function..................................................26
10. Troubleshooting.................................................................31
Caution: Risk of fire/flammable materials

2
1. General information of Outdoor Units
Model name
Dimension (mm)
Compressor
M2OG-14HFN8-Q
800x333x554
KSN140D21UFZ
M2OC-18HFN8-Q
800x333x554
KSM135D23UFZ
M2OD-18HFN8-Q
800x333x554
KSN140D21UFZ
M3OF-21HFN8-Q
845x363x702
KSN140D21UFZ
M3OE-27HFN8-Q
845x363x702
KTF235D22UMT
M3OF-27HFN8-Q
845x363x702
KTM240D57UMT
M4OB-36HFN8-Q
946x410x810
KTF310D43UMT
M4OE-28HFN8-Q
946x410x810
KTM240D57UMT
M5OD-42HFN8-Q
946x410x810
KTF310D43UMT

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2. Features
The hydrophilic fin can improve the heating efficiency at operation mode.
It protects the valves and prevents water from dripping.
4 way valve control
It is only operated in the heating operation mode except defrosting operation.
Outdoor unit
Power relay control
Hydrophilic aluminum fin
Anti-rust cabinet
Valve protection cover
Low noise air flow system
Discharge pipe temperature protection

4
3. Dimensions
Model
Unit：mm
W
D
H
W1
A
B
M2OG-14HFN8-Q
800
333
554
860
514
340
M2OC-18HFN8-Q
800
333
554
860
514
340
M2OD-18HFN8-Q
800
333
554
860
514
340
M3OF-21HFN8-Q
845
363
702
923
540
350
M3OE-27HFN8-Q
845
363
702
923
540
350
M3OF-27HFN8-Q
845
363
702
923
540
350
M4OE-28HFN8-Q
946
410
810
1034
673
403
M4OB-36HFN8-Q
946
410
810
1034
673
403
M5OD-42HFN8-Q
946
410
810
1034
673
403
A
B
D

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4. Refrigeration Cycle Diagram
4.1 Refrigeration circuit drawing of inverter 1 drive 2 type
L IQ U ID V A L V E A
G A S V A L V E A
H E A T
E X C H A N G E
(E V A P O R A T O R )
H E A T
E X C H A N G E
(C O N D E N S ER )
C o m p r e s so r
4 -W A Y V A L V E
C O O L IN G
H E A T IN G
T 2 E v a p o ra to r
te m p . se n s o r
m id d le
T 1 R o o m
te m p . se n s o r
T3
C o n d e n s e r
te m p . se n s o r
T 5 D is c h a rg e
te m p . se n s o r
T 4 A m b ie n t
te m p . se n s o r
IN D O O R O U T D O O R
E X V A C A P IL L A R Y A
C H E C K V A L V E
C A P ILL A R Y T U B E
E X V B C A P IL L A R Y B
L IQ U ID V A L V E B
G A S V A L V E B
A c c u m u la to r
T 2 B - A E v apo ra to r
te m p. sens o r outle t
T 2 B - B
4.2 Refrigeration circuit drawing of inverter 1 drive 3 type
L IQ U ID V A L V E A
G A S V A L V E A
H E A T
E X C H A N G E
(E V A P O R A T O R )
H E A T
E X C H A N G E
(C O N D E N S E R )
C o m p re s s o r
4 -W A Y V A L V E
C O O LIN G
H E A T IN G
T 2 E v a p o ra to r
te m p . s e ns o r
m id d le
T 1 R o o m
te m p . s e ns o r
T3
C o n d e n s e r
te m p . s e ns o r
T 5 D is c h a rg e
te m p . s e ns o r
T 4 A m b ie n t
te m p . s e ns o r
IN D O O R O U T D O O R
E X V A C A P IL LA R Y A
C H E C K V A L V E
C A P ILL A R Y T U B E
E X V B C A P IL LA R Y B
L IQ U ID V A L V E B
G A S V A L V E B
E X V C C A P ILL A R Y C
L IQ U ID V A L V E C
G A S V A L V E C
A c c u m u la to r
T 2 B - A E v a p o ra to r
te m p . s en s o r o u tle t
T 2 B -B
T 2 B -C

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4.3 Refrigeration circuit drawing of inverter 1 drive 4 type
L IQ U ID V A L V E A
G A S V A L V E A
H E A T
E X C H A N G E
(E V A P O R A T O R )
H E A T
E X C H A N G E
(C O N D E N S E R )
C o m p r e ssor
4 -W A Y V A L V E
C O O L IN G
H E A T IN G
T 2 E v a p o ra to r
te m p . s enso r
m id d le
T 1 R o om
te m p . s enso r
T3
C o n d e n s er
te m p . s enso r
T 5 D is c h a rg e
te m p . s enso r
T 4 A m b ie nt
te m p . s enso r
IN D O O R O U T D O O R
E X V A C A P IL LA R Y A
C H E C K V A L V E
C A P ILLA R Y T U B E
E X V B C A P IL LA R Y B
L IQ U ID V A L V E B
G A S V A L V E B
E X V C C A P IL LA R Y C
L IQ U ID V A L V E C
G A S V A L V E C
E X V D C A P IL LA R Y D
L IQ U ID V A L V E D
G A S V A L V E D
A c c u m u la to r
H ig h p re s s ure
sw itc h
L o w p re s s u re
sw itc h
T 2 B -A E v a p ora tor
te m p . s en sor o u tle t
T 2 B -B
T 2 B -C
T 2 B -D
4.4 Refrigeration circuit drawing of inverter 1 drive 5 type
L IQ U ID V A L V E A
G A S V A LV E A
H E A T
E X C H A N G E
(E V A P O R A T O R ) H E A T
E X C H A N G E
(C O N D E N S E R )
C O O L IN G
H E A T IN G
T 2 E v a p o ra tor
tem p . s e n so r
m id d le
T 1 R o o m
tem p . s e n so r
T3
Condenser
tem p . s e n so r
T 4 A m b ie n t
tem p . s e n so r
IN D O O R O U T D O O R
E X V A C A P ILL A R Y A
C H E C K V A L V E
C A P ILL A R Y T U B E
E X V B C A P ILL A R Y B
L IQ U ID V A L V E B
G A S V A L V E B
E X V C C A P IL LA R Y C
L IQ U ID V A L V E C
G A S V A L V E C
E X V D C A P IL LA R Y D
L IQ U ID V A L V E D
G A S V A L V E D
E X V E C A P ILL A R Y E
L IQ U ID V A L V E E
G A S V A L V E E
C om p re ss or
4 -W A Y V A L V E
T 5 D isc h a rg e
tem p . s e n so r
A ccum u la to r
H ig h p ressu re
sw itc h
L o w p re s sure
sw itc h
T 2 B -A E v a p o ra to r
te m p. s e nso r o utle t
T 2 B -B
T 2 B -C
T 2 B -D
T 2 B -E

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5. Wiring diagram
M2OC-18HFN8-Q
M2OG-14HFN8-Q

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M2OD-18HFN8-Q

9
Note: S(1)&S(2) are used in other type of models. They don't need to be connected in multi models.