Daitsu DS-18KIDB User manual

Service Manual
Models: DS-18KIDB DOS-18KIDB
DOS-21KIDB
DS-21KIDB
(Refrigerant R32)

Service Manual
Table of Contents
Part Ⅰ: Technical Information.......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................3
2.1 Specication Sheet...........................................................................................................3
2.2 Operation Characteristic Curve ........................................................................................9
2.2 Capacity Curve in Different Outdoor Temperature ...........................................................9
2.3 Cooling and Heating Data Sheet in Rated Frequency .....................................................9
2.5 Noise Curve....................................................................................................................10
3. Outline Dimension Diagram......................................................................11
3.1 Indoor Unit......................................................................................................................11
3.2 Outdoor Unit ...................................................................................................................12
4. Refrigerant System Diagram....................................................................14
5. Electrical Part.........................................................................................................15
5.1 Wiring Diagram...............................................................................................................15
5.2 PCB Printed Diagram .....................................................................................................17
6. Function and Control......................................................................................20
6.1 Remote Controller Introduction .....................................................................................20
6.2 GREE+ App Operation Manual ......................................................................................24
6.3 Ewpe Smart App Operation Manual...............................................................................25
6.4 Brief Description of Modes and Functions......................................................................26
Part Ⅱ: Installation and Maintenance .................................................35
7. Notes for Installation and Maintenance..........................................35
8. Installation................................................................................................................39
8.1 Installation Dimension Diagram......................................................................................39
8.2 Installation Parts-checking ............................................................................................41
8.3 Selection of Installation Location....................................................................................41
8.4 Electric Connection Requirement...................................................................................41
8.5 Installation of Indoor Unit................................................................................................41
8.6 Installation of Outdoor unit .............................................................................................44
8.7 Vacuum Pumping and Leak Detection ...........................................................................45
8.8 Check after Installation and Test operation ....................................................................45
Table of Contents

Service Manual
9. Maintenance............................................................................................................46
9.1 Malfunction Display of Indoor Unit..................................................................................46
9.2 Procedure of Troubleshooting ........................................................................................48
9.3 Maintenance method for normal malfunction .................................................................66
10. Exploded View and Parts List ..............................................................68
10.1 Indoor Unit....................................................................................................................68
10.2 Outdoor Unit .................................................................................................................72
11. Removal Procedure.......................................................................................78
11.1 Removal Procedure of Indoor Unit ...............................................................................78
11.2 Removal Procedure of Outdoor Unit ............................................................................83
Appendix:........................................................................................................................98
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................98
Appendix 2: Conguration of Connection Pipe.....................................................................98
Appendix 3: Pipe Expanding Method ...................................................................................99
Appendix 4: List of Resistance for Temperature Sensor ....................................................100
Table of Contents

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit:
DS-18KIDB
DS-21KIDB
Outdoor Unit:
Remote Controller:
DOS-18KIDB
DOS-21KIDB

3
Technical Information
Service Manual
2. Specications
2.1 Specication Sheet
Model DS-18KIDB
Product Code
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode Outdoor
Cooling Capacity W 5130
Heating Capacity W 5280
Cooling Power Input W 1600
Heating Power Input W 1450
Cooling Power Current A 7.0
Heating Power Current A 6.3
Rated Input W 2300
Rated Current A 10.8
Rated Heating Current A 12
Air Flow Volume(SH/H/M/L/SL) m3/h 850/720/610/520/-
Dehumidifying Volume L/h 1.8
EER W/W 3.21
COP W/W 3.64
SEER W/W 6.1
HSPF W/W /
Application Area m223-34
Indoor Unit
Model of Indoor Unit DS-18KIDB
Product Code of Indoor Unit
Fan Type Cross-ow
Diameter Length(DXL) mm Φ106X706
Fan Motor Cooling Speed(SH/H/M/L/SL) r/min 1230/1130/1030/800/-
Fan Motor Heating Speed(SH/H/M/L/SL) r/min 1350/1200/1050/900/-
Output of Fan Motor W 35
Fan Motor RLA A 0.35
Fan Motor Capacitor μF 2.5
Input of Heater W /
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter mm Ф7
Row-n Gap mm 2-1.4
Coil Length (LXDXW) mm 715X25.4X304.8
Swing Motor Model MP35CP
Output of Swing Motor W 2.5
Fuse A 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 48/44/39/34/-
Sound Power Level (SH/H/M/L/SL) dB (A) 58/54/49/44/-
Dimension (WXHXD) mm 970X300X225
Dimension of Carton Box (LXWXH) mm 1017X366X285
Dimension of Package (LXWXH) mm 1020X369X295
Net Weight kg 13.5
Gross Weight kg 16.5

4
Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit DOS-18KIDB
Product Code of Outdoor Unit
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXF-B141ZF030A
Compressor Oil 68DA
Compressor Type Rotary
L.R.A. A 25
Compressor RLA A 6.5
Compressor Power Input W 1410
Overload Protector 1NT11L-6233/KSD115oC/HPC 115/95
Throttling Method Electron expansion valve
Operation Temp oC 16~30
Ambient Temp (Cooling) oC -15~43
Ambient Temp (Heating) oC -15~24
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7.94
Rows-n Gap mm 2-1.4
Coil Length (LXDXW) mm 742X38.1X550
Fan Motor Speed rpm 780
Output of Fan Motor W 40
Fan Motor RLA A 0.62
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit m3/h 2400
Fan Type Axial-ow
Fan Diameter mm Φ445
Defrosting Method /
Climate Type T1
Isolation I
Moisture Protection IPX4
Permissible Excessive Operating
Pressure for the Discharge Side MPa 4.3
Permissible Excessive Operating
Pressure for the Suction Side MPa 2.5
Sound Pressure Level (H/M/L) dB (A) 56/-/-
Sound Power Level (H/M/L) dB (A) 66/-/-
Dimension (WXHXD) mm 899X596X378
Dimension of Carton Box (LXWXH) mm 945X417X630
Dimension of Package (LXWXH) mm 948X420X645
Net Weight kg 39
Gross Weight kg 42
Refrigerant R32
Refrigerant Charge kg 0.9
Connection
Pipe
Length m 5
Gas Additional Charge g/m 16
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ12
Max Distance Height m 10
Max Distance Length m25
Note: The connection pipe applies metric diameter.

5
Technical Information
Service Manual
Model DS-21KIDB
Product Code
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode Outdoor
Cooling Capacity W 6155
Heating Capacity W 6448
Cooling Power Input W 1760
Heating Power Input W 1860
Cooling Power Current A 7.7
Heating Power Current A 8.1
Rated Input W 2600
Rated Current A 10.9
Rated Heating Current A 11.3
Air Flow Volume(SH/H/M/L/SL) m3/h 850/720/610/520/-
Dehumidifying Volume L/h 1.8
EER W/W 3.5
COP W/W 3.47
SEER W/W 6.1
HSPF W/W /
Application Area m223-24
Indoor Unit
Model of Indoor Unit DS-21KIDB
Product Code of Indoor Unit CB476N00100
CB488N00500
Fan Type Cross-ow
Diameter Length(DXL) mm Φ106X706
Fan Motor Cooling Speed(SH/H/M/L/SL) r/min 1230/1130/1030/800/-
Fan Motor Heating Speed(SH/H/M/L/SL) r/min 1350/1200/1050/900/-
Output of Fan Motor W 35
Fan Motor RLA A 0.35
Fan Motor Capacitor μF 2.5
Input of Heater W /
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter mm Ф7
Row-n Gap mm 2-1.4
Coil Length (LXDXW) mm 715X25.4X304.8
Swing Motor Model MP35CP
Output of Swing Motor W 2.5
Fuse A 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 48/44/40/34/-
Sound Power Level (SH/H/M/L/SL) dB (A) 58/54/50/44/-
Dimension (WXHXD) mm 970X300X225
Dimension of Carton Box (LXWXH) mm 1017X366X285
Dimension of Package (LXWXH) mm 1020X369X295
Net Weight kg 13.5
Gross Weight kg 16.5

6
Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit DOS-21KIDB
Product Code of Outdoor Unit
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXF-B141ZF030A
Compressor Oil 68DA
Compressor Type Rotary
L.R.A. A 25
Compressor RLA A 6.5
Compressor Power Input W 1410
Overload Protector 1NT11L-6233/KSD115oC/HPC 115/95
Throttling Method Electron expansion valve
Operation Temp oC 16~30
Ambient Temp (Cooling) oC -15~43
Ambient Temp (Heating) oC -15~24
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Rows-n Gap mm 2-1.4
Coil Length (LXDXW) mm 935X38.1X660
Fan Motor Speed rpm 780
Output of Fan Motor W 60
Fan Motor RLA A 0.49
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit m3/h 3200
Fan Type Axial-ow
Fan Diameter mm Φ520
Defrosting Method /
Climate Type T1
Isolation I
Moisture Protection IPX4
Permissible Excessive Operating
Pressure for the Discharge Side MPa 4.3
Permissible Excessive Operating
Pressure for the Suction Side MPa 2.5
Sound Pressure Level (H/M/L) dB (A) 57/-/-
Sound Power Level (H/M/L) dB (A) 67/-/-
Dimension (WXHXD) mm 955X700X396
Dimension of Carton Box (LXWXH) mm 1026X455X735
Dimension of Package (LXWXH) mm 1029X458X750
Net Weight kg 49
Gross Weight kg 50.5
Refrigerant R32
Refrigerant Charge kg 1.3
Connection
Pipe
Length m 5
Gas Additional Charge g/m 40
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ16
Max Distance Height m 10
Max Distance Length m25
Note: The connection pipe applies metric diameter.

9
Technical Information
Service Manual
2.2 Capacity Curve in Different Outdoor Temperature
2.3 Cooling and Heating Data Sheet in Rated Frequency
Heating
Rated heatling condition(°C)
(DB/WB) Model
Pressure of gas pipe connecting
indoor and outdoor unit
Inlet and outlet pipe temperature
of heat exchanger Fan speed of
indoor unit
Fan speed of
outdoor unit
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
20/- 7/6 18/24K 3.5~3.8 in:75~85
out:37~43
in:1~3
out:2~5 Super High High
Rated cooling condition(°C)
(DB/WB) Model
Pressure of gas pipe connecting
indoor and outdoor unit
Inlet and outlet pipe temperature
of heat exchanger Fan speed of
indoor unit
Fan speed of
outdoor unit
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
27/19 35/24 18/24K 0.8~1.0 in:8~11
out:11~14
in:75~85
out:37~43 Super High High
Cooling
Instruction:
T1: Inlet and outlet pipe temperature of evaporator
T2: Inlet and outlet pipe temperature of condenser
P: Pressure at the side of big valve
Connection pipe length: 5m.
Cooling Heating
32 33 34 35 36 37 38 39 43 –15 –10 –5
40 41 42
100
105
95
90
85
80
75
70
65
60
55
50
110
100
90
80
70
60
50
40
05
710
Conditions
Indoor:DB27°C/WB19°C
Indoor air flow:Super High
Pipe length: 5m
Conditions
Indoor:DB20°C/WB15°C
Indoor air flow:Super High
Pipe length: 5m
Outdoor temp.(°C) Outdoor temp.(°C)
Capacity ratio (%)
Capacity ratio (%)
Cooling Heating
2.2 Operation Characteristic Curve
01020304050607090010 20 30 40 50 60 70 80 90 100 120110
80
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
220V
230V
240V
220V
230V
240V
01020304050607090010 20 30 40 50 60 70 80 90 100
120
110
80
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C/WB24°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C/WB24°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB20°C/WB15°C
Outdoor: DB7°C/WB6°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB20°C/WB15°C
Outdoor: DB7°C/WB6°C
Indoor air flow: High
Pipe length: 5m
Cooling Heating

10
Technical Information
Service Manual
2.5 Noise Curve
Indoor side noise
60
50
40
30
20
10
0
Indoor Fan Motor Rotating Speed
Noice/dB(A)
low Middle High Super High
Outdoor side noise
Compressor frequency/Hz
Noise/dB(A)
70
60
50
40
30
02040608
01
00
20