Kaisai KOB30U-18HFN32 User manual

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KAISAI
SUPER DC INVERTER SERIES
Service Manual 2019

Contents
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Contents
Part 1 General Information .................................................................................................... 1
Part 2 Indoor Units ................................................................................................................. 5
Part 3 Outdoor Units ............................................................................................................ 83
Part 4 Installation.................................................................................................................. 99
Part 5 Electrical Control System....................................................................................... 129
※The specifications, designs, and information in this book are subject to change without notice for
product improvement.

General Information
General Information
1
Part 1
General Information
1. Model List.............................................................................................2
2. External Appearance...........................................................................3
2.1 Indoor Units............................................................................................................... 3
2.2 Outdoor Units............................................................................................................ 3

General Information
2
Model List
1. Model List
1.1 Indoor Units
R32 (capacity multiplied by 1000Btu/h)
Type
Function
12
18
24
36
48
55
Super Slim Four-way Cassette
Cooling and heating
●
●
●
●
A6 Duct
Cooling and heating
●
●
●
●
●
Ceiling-floor
Cooling and heating
●
●
●
●
●
Compact cassette
Cooling and heating
●
1.2 Outdoor Units
Universal Outdoor unit Model
Compressor type
Compressor Brand
Matched indoor units
KOB30U-18HFN32
Rotary
GMCC
KTI-18HWF32
KUE-18HRF32
KOCA30U-24HFN32
Rotary
GMCC
KCD-24HRF32
KTI-24HWF32
KUE-24HRF32
KOD30U-36HFN32
Rotary
GMCC
KCD-36HRF32
KTI-36HWF32
KUE-36HRF32
KOE30U-48HFN32
Rotary
GMCC
KCD-48HRF32
MTI-48HWF32
KUE-48HRF32
KOE30U-55HFN32
Rotary
GMCC
KCD-55HRF32
KTI-55HWF32
MUE-55HRF32
KOB30-12HFN32X
Rotary
GMCC
KCA3U-12HRF32X

General Information
3
External Appearance
2. External Appearance
2.1 Indoor Units
Super slim cassette
Duct
Ceiling-Floor
Compact Four-way cassette
2.2 Outdoor Units
Single fan outdoor unit
Double fan outdoor unit

Indoor Units
Indoor Units
5
Part 2
Indoor Units
Super Slim Cassette Type........................................................6
A6 Duct Type.............................................................................27
Ceiling & Floor Type................................................................50
Compact Four-way Cassette Type.......................................69

Indoor Units
6
Super Slim Cassette Type
Super Slim Cassette Type
1. Features ...........................................................................7
2. Dimensions ....................................................................10
3. Service Space ................................................................11
4. Wiring Diagrams ............................................................12
5. Air Velocity Distributions (Reference Data).................18
6. Electric Characteristics.................................................21
7. Sound Levels .................................................................22
8. Accessories....................................................................23
9. The Specification of Power...........................................24
10. Field Wiring..................................................................25

Indoor Units
7
Features
1. Features
1.1Overview
➢Compact design, super slim body size, less space requiring ininstallation
➢Each louver can be separately controlled, more comfort air blowing ispossible.
➢Auto-lifting panel design, more convenient to clean and maintain the filter.(optional)
1.2 Fresh air intake function
➢Fresh air fulfills air quality more healthy andcomfortable.
➢Ventilation motor is optional to increase the effect of fresh air.
1.3Optional ionizer generator
➢Ionizer generator is optional to get refreshing air to yourroom.
➢Ionizer can be switched on or off by remote controller.
When pressing the Clean Air button on the remote controller, Ionizer will work and the indicator light on
display board will shine.
1.4 External air duct design
➢Reserve external air duct, more flexible for the air supply.
Ionizer generator
connector
Ventilationmotor
connector

Indoor Units
8
Features
Draining Pump
1.5 Built-in draining pump
➢Due to the improvement of structure, more convenient to repair or replace the drainingpump.
➢Built-in draining pump to make sure condensed water drain out reliably.
1.6Terminals for alarm lamp and long-distance on-off controller connection are
standard
➢Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human
control.

Indoor Units
9
Features
1.7Twins Combination(24k)
➢The units can be installed as Twin systems: one outdoor unit can connect with two indoor units. The
indoor units can be combined in any of the different availableratings.
Long-distance on-off controller
Alarm lamp

Indoor Units
10
Dimensions
2. Dimensions
92 92
75 F r e s h a i r i n t a k e
A 80
D
D
4 - in s ta ll h a n g e r
G a s s i d e
L iq u id s id e
E -p a r ts b o x
680
B o d y
136
126
91
W i r i n g c o n n e c t i o n p o r t
S e rv ic e h o le fo r
d r a in in g p u m p
B
32 D r a i n h o l e
T e s t m o u t h & T e s t c o v e r
B 680
840
D
D
196
C
A A
92 92 92 92
P a n e l
950
5 5
Unit: mm
Model
A
B
C
D
KCD-24HRF32
KCD-36HRF32
160
95
245
60
KCD-48HRF32
KCD-55HRF32
160
95
287
60
92 92 92 92
A
A
D
D
780
D
D
B
B
780
80
840
950
A
A
90
132
92 92 92 92
135

Indoor Units
11
Service Space
3. Service Space
>1000m m
>1000mm
>1000m m
> 1000m m

Indoor Units
12
Wiring Diagrams
4. Wiring Diagrams
KCD-24HRF32, KCD-36HRF32, KCD-48HRF32, KCD-55HRF32
4.1 Some connectors introduce:
A For remote control (ON-OFF) terminal port CN23 and short connector of JR6
1. Remove the short connector of JR6 when you use ON-OFF function;
2. When remote switch off (OPEN), the unit would be off;
3. When remote switch on (CLOSE), the unit would be on;
4. When close/open the remote switch, the unit would be responded the demand within 2
seconds;
5. When the remote switch on. You can use remote controller/wire controller to select the
mode what you want; when the remote switch off, the unit would not respond the demand from
remote controller/wire controller.
When the remote switch off, but the remote controller/wire controller are on, CP code would be
shown on the display board.
6. The voltage of the port is 12V DC, design Max. current is 5mA.

Indoor Units
13
Wiring Diagrams
B For ALARM terminal port CN33
1. Provide the terminal port to connect ALARM, but no voltage of the terminal port , thepower
from the ALARM system (not from the unit )
2. Although design voltage can support higher voltage, but we strongly ask you connect the
power less than 24V, current less than 0.5A
3. When the unit occurs the problem, the relay would be closed, then ALARM works
C. For new fresh motor terminal port CN8
1. Connect the fan motor to the port, no need care L/N of the motor;
2. The output voltage is the power supply;
3. The fresh motor cannot excess 200W or 1A, follow the smaller one;
4. The new fresh motor will be worked when the indoor fan motor work ;when the indoorfan
motor stops, the new fresh motor would be stopped;
5. When the unit enter force cooling mode or capacity testing mode, the fresh motor isn’twork.

Indoor Units
14
Wiring Diagrams

Indoor Units
15
Wiring Diagrams
4.2 Micro-Switch Introduce:
A. Micro-switch SW1 is for selection of indoor fan stop temperature (TEL0) when it is in anti-
cold wind action in heating mode.
Range: 24oC, 15oC, 8 oC, according to EEROM setting (reserved for special customizing).
T 2
T E L 0 + 1 6
T E L 0 + 1 4
T E L 0 + 1 2
T E L 0 + 1 0
T E L 0 + 8
T E L 0 + 6
S e t t i n g f a n s p e e d
H
M +
M
L
S u p e r s l o w
F a n o f f
T E L 0 + 1 2
T E L 0 + 1 0
T E L 0 + 8
T E L 0 + 6
T E L 0 + 4
B.Micro-switch SW2 is for selection of indoor FAN ACTION if room temperature reaches the
setpoint and the compressor stops.
Range: OFF (in 127s), Keep running.
T E L 0

Indoor Units
16
Wiring Diagrams
C.Micro-switch SW3 is for selection of auto-restart function.
Range: Active, inactive
D. Micro-switch SW5 is for setting the master or slave unit when the unit is in twin connection.
Range: Master no slave (Normal 1 drive 1 connection), Master (2 positions without
difference), Slave
E.Micro-switch SW6 is for selection of temperature compensation in heating mode. This helps
to reduce the real temperature difference between ceiling and floor so that the unit could run
properly. If the height of installation is lower, smaller value could be chosen.
Range: 6oC, 4oC, 2oC, E function (reserved for special customizing)
F.Micro-switch S1 and dial-switch S2 are for address setting when you want to control this unit
by a central controller.
Range: 00-63

Indoor Units
17
Wiring Diagrams
G. Dial-switch ENC1: The indoor PCB is universal designed for whole series units from18K
to 55K. This ENC1 setting will tell the main program what size the unit is.
NOTE: Usually there is glue on it because the switch position cannot be changed at random
unless you want to use this PCB as a spare part to use in another unit. Then you have to select
the right position to match the size of the unit.

Indoor Units
18
Air Velocity Distributions (Reference Data)
5. Air Velocity Distributions (Reference Data)
24K:
Cooling:
Heating:

Indoor Units
19
Air Velocity Distributions (Reference Data)
30-42K:
Cooling:
Heating: