Kaisai K2OC-18HFN32 User manual

SERVICE MANUAL
R32 SUPER DC INVERTER MULTI TYPE
K2OC-18HFN32
K3OE-27HFN32
K4OB-36HFN32
K5OD-42HFN32
DC MULTI OUTDOOR UNITS

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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....................................................11
7. Sound Levels........................................................................13
8. Installation Details ...............................................................14
8.1 Wrench torque sheet for installation........................................................................... 14
8.2 Connecting the cables................................................................................................ 14
8.3 Pipe length and the elevation..................................................................................... 14
8.4 Installation for the first time......................................................................................... 15
8.5 Adding the refrigerant after running the system for many years ................................ 18
8.6 Re-installation while the indoor unit need to be repaired........................................... 19
8.7 Re-installation while the outdoor unit need to be repaired......................................... 21
9. Electronic control function .................................................23
10. Troubleshooting.................................................................28
Caution: Risk of fire R32/flammable materials

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1. General information of Outdoor Units
Model name
Dimension (mm)
Compressor
K2OC-18HFN32
800x333x554
KSM135D23UFZ
K3OE-27HFN32
845x363x702
KTF235D22UMT
K4OB-36HFN32
946x410x810
KTF310D43UMT
K5OD-42HFN32
946x410x810
KTF310D43UMT

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

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3. Dimensions
A
D B
Model
Unit：mm
W
D
H
W1
A
B
K2OC-18HFN32
800
333
554
860
514
340
K3OE-27HFN32
845
363
702
923
540
350
K4OB-36HFN32
946
410
810
1034
673
403
K5OD-42HFN32
946
410
810
1034
673
403

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4. Refrigeration Cycle Diagram
4.1 Refrigeration circuit drawing of inverter 1 drive 2 type
IN D O O R O U T D O O R
L I Q U I D V A L V E A
E X V A C A P I L L A RY A
C H E C K V A L V E
H E A T
E X C H A N G E
(E V A PO R A T O R )
T2 E vapo ra tor
t e m p . s e n s o r
m id dle
T 1 R o o m
te m p. se nso r
L I Q U I D V A L V E B
G A S V A L V E A
G A S V A L V E B
E X V B CA P I L LA R Y B
T 2 B -A E v a p o r a to r
te m p . s e n s o r o u tlet
T 2 B - B
C A P I L L A R Y T U B E
T 4 A m b ie n t
te m p. sensor
4 - W A Y V A L V E
T3
C on den ser
te m p. sen sor
H E A T
E X C H A N G E
( C O N D E N S E R )
A c c u m u l a t o r
C o m press or
T 5 D isch arge
te m p. s en so r
C O O L I NG
H E A T I N G
4.2 Refrigeration circuit drawing of inverter 1 drive 3 type
E X V A C A P I L L A R Y A
L I Q U I D V A L V E A
L I Q U I D V A L V E B
E X V B C A PI L L A RY B C H E C K V A L V E
L I Q U I D V A L V E C
E X V C C A P I L L A R Y C
C A P IL L A R Y T U B E
T3
C o n d e n s e r
t e m p . s e n s o r
H E A T
E X C H A N G E
(E V A P O R A T O R )
T 1 R o o m
t e m p . s e n s o r
T 4 A m b ie n t
t e m p . s e n s o r
H E A T
E X C H A N G E
( C O N D E N S E R )
T 2 E v ap o ra tor
t e m p . s e n s o r
m id dle
G A S V A L V E A
G A S V A L V E B
T 2 B -A E v a p o ra to r
te m p . s e n s o r o u t let
T 2 B - B
4 - W A Y V A L V E
G A S V A L V E C
T 2 B -C
A c c um ulato r
C om pre ss or
T 5 D ischarg e
te m p . s en so r
C O O L I NG
H E A T I N G

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4.3 Refrigeration circuit drawing of inverter 1 drive 4 type
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
L IQ U ID V A L V E A
L IQ U ID V A L V E B
E X V B C A P IL L A R Y B
C H E C K V A L V E
L IQ U ID V A L V E C
L IQ U ID V A L V E D
E X V C C A P IL L A R Y C
E X V D C A P IL L A R Y D
C A P IL L A R Y T U B E
T3
C o n d e n s e r
te m p . s e n s o r
H E A T
E X C H A N G E
(E V A P O R A T O R )
T 1 R o o m
te m p . s e n s o r
T 4 A m b ie n t
te m p . s e n s o r
H E A T
E X C H A N G E
( C O N D E N S E R )
G A S V A L V E A
T 2 B - A E v a p o rato r
tem p . s e n so r o u tle t
T 2 E v a p o ra to r
te m p . s e n s o r
m id d le
G A S V A L V E B
G A S V A L V E C
G A S V A L V E D
T 2B -B
T 2B -C
T 2B -D
A c c u m u la to r
L o w p r e ss u re
sw itc h
C o m p re s s o r
4 - W A Y V A L V E
H ig h p r e s s u re
s w i tc h
T 5 D isc h a rge
tem p . s e ns o r
C O O L IN G
H E A T IN G
4.4 Refrigeration circuit drawing of inverter 1 drive 5 type
IN D O O R O U T D O OR
E X V A C A P I L L A R Y A
L I Q U I D V A L V E A
E X V B C A P I L L A R Y B
L I Q U I D V A L V E B
L I Q U I D V A L V E C E X V C C A P I L L A R Y C C H E C K V A L V E
L I Q U I D V A L V E D
E X V D C A P I L L A R Y D
C A P IL L A R Y T U B E
T3
C o n d e n s e r
t e m p . s e n s o r
E X V E C A P I L L A R Y E
L I Q U I D V A L V E E
H E A T
E X C H A N G E
(E V A P O R A T O R )
T 1 R o o m
tem p. s e ns or
G A S V A L V E A
T 2 B -A E v ap o ra to r
tem p . s en sor outlet
T 4 A m b ie n t
t e m p . s e n s o r
H E A T
E X C H A N G E
( C O N D E N S E R )
T 2 E v a p o ra to r
t e m p . s e n s o r
m id dle
G A S V A L V E B
G A S V A L V E C
G A S V A L V E D
G A S V A L V E E
T 2 B -B
T 2 B -C
T 2 B -D
T 2 B -E
A c c u m u l a t o r
L o w p re ss u re
s w it c h
C o m p re s so r
4 -W A Y V A L V E
H ig h p r e s s u re
s w it c h
T 5 D isc h a rg e
tem p . s e n so r
C O O L I N G
H E A T I N G

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5. Wiring diagram
K2OC-18HFN32

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Note:S(1)&S(2)are used in othertypeofmodels.Theydon'tneedtobeconnectedin multimodels.
K3OE-27HFN32

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K4OB-36HFN32