Airwell AW-FWDB018-N91 User manual

SERVICE MANUAL
FLOOR & CEILING
R32
English Manual
Low temperature application
20.AW.FWDB.18-24.R32.SM.EN.03.06
IMPORTANT NOTE:
Read this manual carefully before installing or operating your new air conditioning unit. Make sure to
save this manual for future reference.

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
SUMMARY
Part 1. Reference........................................................................................................ 3
1. Model Names of Indoor/Outdoor Units .......................................................................4
2. External Appearance .....................................................................................................5
3. Features...........................................................................................................................5
Part2. Indoor Unit ....................................................................................................... 6
Floor & Ceiling ........................................................................................................... 6
1 Features...........................................................................................................................7
2 Specifications ..................................................................................................................9
3 Dimensions....................................................................................................................10
4 Service Space ...............................................................................................................10
5 Wiring Diagrams ...........................................................................................................11
6. Capacity Table..............................................................................................................12
7 Electric Characteristics ................................................................................................13
8. Exploded View..............................................................................................................14
9 Accessories....................................................................................................................15
10 The Specification of Power .......................................................................................16
11 Field Wiring..................................................................................................................16
12 Troubleshooting ..........................................................................................................17
12.1 Fault codes table ............................................................................. 17
12.2 Spot check....................................................................................... 18
Part 3 Outdoor Units ................................................................................................ 19
1 Specification ..................................................................................................................20
2Dimensions ...............................................................................................................21
3 Service Space ...............................................................................................................22
4 Wiring Diagrams ...........................................................................................................23
5 Electric Characteristics ................................................................................................24
6 Operation Limits............................................................................................................24
7.Sound Levels.................................................................................................................25
8. Exploded View..............................................................................................................26
8.1 AW-YMDB018-H91 ........................................................................... 26
8.2 AW-YMDB024-H91 ........................................................................... 28
9 Troubleshooting.............................................................................................................30
9.1 Single phase unit ............................................................................... 30

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
Part 4 Installation ..................................................................................................... 32
1. Precaution on Installation ...........................................................................................33
2 Vacuum Dry and Leakage Checking .........................................................................34
3 Additional Refrigerant Charge.....................................................................................36
4 Water Drainage .............................................................................................................37
4.1 Gradient and Supporting ................................................................... 37
4.2 Drainpipe Trap ................................................................................... 37
4.5 Drainage test ..................................................................................... 38
5 Insulation Work..............................................................................................................39
5.1 Insulation material and thickness ...................................................... 39
5.2 Refrigerant pipe insulation ................................................................ 39
5.3 Drainage pipe insulation .................................................................... 40
5.4 Note ................................................................................................... 40
6. Test Operation ..............................................................................................................41
Part 5 Controller ....................................................................................................... 42
1 Wired Controller ............................................................................................................43

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
3
Part 1. Reference
1. Model Names of Indoor/Outdoor Units .......................................................................4
2. External Appearance .....................................................................................................5
3. Features ..........................................................................................................................5

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
4
1. Model Names of Indoor/Outdoor Units
1.1 Indoor Units
Model name
Code
Dimension
(W×H×D) (mm)
Net/Gross
weight(kg)
Power supply
AW-FWDB018-N91
7SP012274
1245×680×240
34/40
220~240V-1Ph-50Hz
AW-FWDB024-N91
7SP012275
1245×680×240
35/41
220~240V-1Ph-50Hz
1.2 Outdoor Units
Model name
Code
Dimension
(W×H×D) (mm)
Net/Gross
weight(kg)
Power supply
AW-YMDB018-H91
7SP063092
925×700×366
42/45
220~240V-1Ph-50Hz
AW-YMDB024-H91
7SP063093
958×843×392
52/62
220~240V-1Ph-50Hz

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2. External Appearance
2.1 Indoor unit
Floor & Ceiling
2.2 Outdoor unit
AW-YMDB018-H91
AW-YMDB024-H91
3. Features
3.1 Wide operation range, -15 for cooling and -15 for heating.
3.2Excellent in efficiency, SCOP higher than 3.8, meet the EU’s new energy efficiency
standards.
3.3 High quality coils
The coil is constructed of advanced inner grooved copper tube and aluminum fins.
3.4 Low operation sound level: Well-known stable and quiet running DC fan motor.
3.5 Well-known compressor, Mitsubishi.
3.6 Universal design: convenient for market stock and spare parts stock.
3.7 R32 is environment friendly refrigerant.
3.8 CE certification, ROHS certification, EUROVENT certification

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3 Features
1. Flexible installation, ceiling suspended and floor standing.
2. Adopting centrifugal fans, higher ESP and longer air flow distance.
3. Two way auto-swing function, built-in two louver step motors, vertical and horizontal air-flow
adjustment.
4. Washable air filter

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
8
5. High efficiency DC fan motor, low noise and more comfortable.
6. New upper and lower buckle type wheel case, the upper plastic wheel case can be
removed alone, which is convenient adjust the wheel motor.
7. Adopting waterproof plastic film on water collector, avoiding water leakage.
8. Self-diagnostic function and multi protection; Auto-restart function.
9. Standard wired controller

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
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2 Specifications
Model
AW-FWDB018-N91
AW-FWDB024-N91
Indoor power supply
V/Ph/Hz
220~240/1/50
220~240/1/50
Cooling
Capacity
KW
2.0-5.3-5.6
3.5-7.0-8.0
Power input
W
420-1640-2100
600-2200-3000
Current input
A
2.1-10.1
2.5-9.8-13
EER
W/W
3.23
3.18
SEER
W/W
6.1
6.1
Heating
Capacity
KW
2.5-5.9-6.0
4.5-7.7-8.5
Input
W
500-1530-1940
680-1980-2600
Rated current
A
2.5-9.2
3.2-11
COP
W/W
3.87
3.89
SCOP
W/W
4.0
4.0
Energy rate
Cooling
A++
A++
Energy rate
Heating
A+
A+
Max. power input
W
2400
3200
Max. current input
A
11.4
14
Indoor fan
motor
Model
DR-310-120LD-8
DR-310-120LD-8
Brand
Panasonic
Panasonic
Power output
W
120
120
Speed
r/min
1400
1400
Insulation class
E
E
Indoor coil
Number of rows
2
3
Tube pitch(a)xrow pitch(b)
mm
21×13.37
21×13.37
Fin spacing
mm
1.4
1.4
Fin type
Hydrophilic
Hydrophilic
Tube outside dia. and type
mm
Ф7
Ф7
inner grooved
inner grooved
Coil length x height x width
mm
1000x252x26.74
1000x252x40.11
Number of circuits
2
4
Indoor air flow (High speed)
m3/h
900/800/650
1150/1000/850
Indoor noise
level
power level
dB(A)
46～58
53～60
pressure level
36/42/47
43/46/49
Indoor unit
Dimension (W*H*D)
Body (mm)
1245×680×240
1245×680×240
Packing (W*H*D)
Body (mm)
1325×770×325
1325×770×325
Net/Gross weight
Body (Kg)
34/40
35/41
Max pressure
MPa
4.2
4.2
Refrigerant type
R32
R32
Refrigerant
piping
Liquid side/Gas side
mm
Φ6.35/Φ12.7
Φ9.52/Φ15.88
Drainage pipe
mm
DN25
DN25
Standard controller
Wired controller
Operation temp
°C
12～32
12～32
Ambient
temp
cooling
°C
-15～50
-15～50
heating
°C
-15～30
-15～30
Notes:
1. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB; Equivalent ref. Piping: 5m (horizontal)
2.Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB; Outdoor temp: 7°CDB, 6°CWB; Equivalent ref. Piping: 5m (horizontal)
3.Actual noise level may differ, depending on the room structure, etc, since these noise values are from an
anechoic room.

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
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3 Dimensions
AW-FWDB018-N91 & AW-FWDB024-N91
680
1245
200150
1119
244
240
4 Service Space

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5 Wiring Diagrams
5.1 AW-FWDB018-N91 & AW-FWDB024-N91
1
ON
1
ON That DIP to Digital
That DIP to ON
NOTE:
SW2 NO.3 FAN SPEED
Normal speed
High speed
FAN SPEED CHOICE
3OFF
ON OFF ON
3
SW2
1 2 3 4 5 6 7 8
OFF ON
N1L1 S
Connect to
Rec eive and display light board
SW2
Digital tube
LED
NO.4
OFF
ON
OFF
ON
4 4
SW2
No power-down memory
power-down memory
NO.5
OFF
ON
OFF
ON
5 5
SW2 NO.6
Heating temperature
6¡ æ 2¡ æ
6OFF
ON OFF ON
6
SW2 NO.7
7
OFF ON OFF ON
7
SW2 N O.1,2 Indoor models
Indoor models Select bits
1 2 Floor&Ceiling Unit
compensation
YE/GN
CN26
REMO_CTRL
T1
T2
T2B
CN17
0
F
1
S W1
CN10
CN3
L N
S W2
BR
BL
PU MP
CN2
P UMP
RIGHT F AN CN8
P T1
P T2
P T3
S
CN37
CN4
HEATER
OUT P OWER
CN11
CN27
CN23
Wire c ontrolDuct di splay
Controller
Receive and display light board
WAT ER
S WI TCH
DC FAN1
CN19
CN20 S WING2
S WING1
Reserved Reserved Reserved
NOT E:Around the ring 5 ring
NOT E : Around the ring 5 ring
the outdoor
Ring user selection
BL
BR
BK
MOD EL POWER SW1
Reserved Reserved
0
21
7K
1
26
9K
2
35
12K
3
53
18K
80 27K
6
90 105
36K
4
70
24K
5
30K
7 8
125
42K
9
140
48K
160 55K
C
180
A
150
52K
B
60K
D E F
Reserved Reserved
HP Reserved 0.8 1.0 1.5 2.0 3.0 3.5 4.02.5 4.5 5.0 6.0 6.55.5 Reserved SW2 NO.8
8
ON ON
8

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6. Capacity Table
Cooling
6.1 AW-FWDB018-N91
6.2 AW-FWDB024-N91
All the data are measured at the wired controller setting temperature of 12℃.

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
13
Heating
6.3 AW-FWDB018-N91
MODEL
AW-FWDB018-N91
HEATING
OUTDOOR CONDITIONS
Indoor Conditions
24ºC D
18ºC W
15ºC D
14ºC W
7ºC D
6ºC W
3ºC D
2ºC W
-5ºC D
-6ºC W
-7ºC D
-8ºC W
-14ºC D
-15ºC W
15ºC
Capacity kW
6.05
6.00
5.98
5.81
5.55
5.47
4.86
Input kW
1.66
1.51
1.47
1.45
1.42
1.41
1.34
18ºC
Capacity kW
5.99
5.96
5.94
5.77
5.52
5.43
4.90
Input kW
1.70
1.54
1.50
1.47
1.44
1.43
1.36
20ºC
Capacity kW
5.96
5.92
5.90
5.73
5.48
5.40
4.86
Input kW
1.72
1.56
1.53
1.51
1.47
1.46
1.40
22ºC
Capacity kW
5.93
5.88
5.86
5.69
5.44
5.36
4.83
Input kW
1.75
1.60
1.55
1.53
1.50
1.49
1.42
27ºC
Capacity kW
5.80
5.84
5.82
5.65
5.40
5.32
4.79
Input kW
1.78
1.62
1.57
1.55
1.53
1.52
1.44
6.4 AW-FWDB024-N91
MODEL
AW-FWDB024-N91
HEATING
OUTDOOR CONDITIONS
Indoor Conditions
24ºC D
18ºC W
15ºC D
14ºC W
7ºC D
6ºC W
3ºC D
2ºC W
-5ºC D
-6ºC W
-7ºC D
-8ºC W
-14ºC D
-15ºC W
15ºC
Capacity kW
7.95
7.83
7.81
7.58
7.25
7.14
6.43
Input kW
2.08
1.97
1.92
1.89
1.85
1.84
1.75
18ºC
Capacity kW
7.90
7.78
7.75
7.53
7.20
7.09
6.39
Input kW
2.11
2.01
1.95
1.92
1.88
1.87
1.78
20ºC
Capacity kW
7.86
7.73
7.70
7.47
7.15
7.04
6.35
Input kW
2.17
2.04
1.98
1.96
1.92
1.90
1.81
22ºC
Capacity kW
7.82
7.67
7.65
7.42
7.10
6.99
6.30
Input kW
2.21
2.08
2.02
1.99
1.95
1.94
1.84
27ºC
Capacity kW
7.73
7.62
7.59
7.37
7.05
6.94
6.26
Input kW
2.26
2.12
2.06
2.03
1.99
1.97
1.88
7 Electric Characteristics
Model
Indoor Units
Indoor Fan Motor
Hz
Voltage
Min.
Max.
kW
AW-FWDB018-N91
50
220-240V
198
254
0.12
AW-FWDB024-N91
50
220-240V
198
254
0.12

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8. Exploded View
8.1 AW-FWDB018-N91 & AW-FWDB024-N91
No.
Part Name
No.
Part Name
1
Rear cover with cotton
17
Supporting board for motor
2
Chassis assembly
18
Weld assembly for intermediate transverse girder
3
Electric box cover
19
Right mounting plate of evaporator
4
E-part box mat
20
Right cover
5
Indoor PCB assembly
21
Right seal plate
5.1
E-part box
22
Right separating board
5.2
Indoor PCB
23
Evaporator component
5.3
Relay
23.1
Left mounting plate of evaporator
5.4
plastic base of Electric control board
23.2
Shunt capillary assembly
5.5
Terminal
23.3
Air inlet header pipe assembly of evaporator
6
Left seal plate
23.4
Evaporator assembly
7
Left cover
24
Air-out frame component
8
Left hoisting pate
24.1
Fixing board assembly for air-out frame
9
Left separating board Ⅰ
24.2
Display film
10
Motor holder
24.3
Display lamp panel
11
Wheel volute
24.4
Vertical step motor
12
Indoor fan motor
24.5
Horizontal step motor
13
Connecting shaft
24.6
End bearing of louver
14
Air inlet grille
24.7
Intermediate bearing of louver
15
Top Cover assembly
24.8
Guard vane
16
Weld assembly of Water drain pan
25
Upper horizontal louver
16.1
Water outlet rubber cover
26
Down horizontal louver

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9 Accessories
Installation fittings
Name
Shape
Quantity
1.Hanging arm
2
Controller
2. Wired controller
1
3. Mounting screw
(ST2.9×10-C-H)
2
Others
4. Installation & operation
instruction manual
1

20AW-SERVICE MANUAL FWDB R32-EN-20200120-Rev01
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10 The Specification of Power
Model
AW-FWDB018-N91
AW-FWDB024-N91
Indoor power supply
V/Ph/Hz
220~240/1/50
Outdoor power supply
V/Ph/Hz
220~240/1/50
Power Supply Method
From outdoor unit
Outdoor unit Power Supply Wire
3×12AWG
3×12AWG
Indoor unit Power Supply Wire
4×14AWG
4×14AWG
Signal wiring
4×2.5
4×2.5
11 Field Wiring

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17
12 Troubleshooting
12.1 Fault codes table
Table 1: Wired controller
Display
Error description
Display
Error description
E0
Phase protection
F0
(reserve)
E1
Communication error between
outdoor unit and indoor unit
F1
(reserve)
E2
Indoor room temperature (T1)
sensor error
F2
(reserve)
E3
Indoor coil middle temperature
(T2) sensor error
F3
Outdoor unit current error cannot
recover
Display P3 error for 3 times
within 60 minutes
E4
Indoor coil outlet temperature
(T2B) sensor error
F4
Outdoor temperature (T4) sensor
error
E5
Outdoor unit error
F5
(reserve)
E6
Zero speed protection
F6
Outdoor unit condenser outlet
(T3) sensor error
E7
EERPOM error
F7
Secondary side current
protection
E8
Indoor fan motor speed lose
protection
F8
Heat T2 temp. protection
E9
Wired controller communication
error
F9
Outdoor unit voltage error
EE
Water level alarm error
EF
EF(Reserve)
P0
(reserve)
H0
Communication error between
outdoor unit mainboard and
driver board
P1
(reserve)
H1
(reserve)
P2
(reserve)
H2
(reserve)
P3
Primary/secondary
overcurrent protection
H3
(reserve)
P4
Exhaust temperature
over-high protection
H4
3 times of P6 error within 30
minutes
P5
Outdoor unit condenser
outlet (T3) temperature
over-high protection
H5
3 times of P2 error within 30
minutes
P6
Compressor driver error or
IPM protection
H6
3 times of P4 error within 100
minutes
P7
(reserve)
H7
(reserve)
P8
(reserve)
H8
(reserve)
P9
Outdoor unit DC fan motor
error
H9
2 times of P9 error within 10
minutes

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18
Table 2: LED display
Error description
Display
content
Indoor unit waiting for address assignment
LED timer and running flash together
(reserve)
LED timer, running, protection, defrost
flash together
Communication error between outdoor unit and indoor unit
LED timer flash quickly
Fan motor stall protection
LED timer flash slowly
Indoor unit temperature sensor error
LED run flash
Water level alarm
LED protection flash
(reserve)
LED defrost flash
Outdoor unit error
LED protection flash slowly
EEPROM error
LED defrost flash slowly
Quickly flash is 2.5Hz, slowly flash is 0.5Hz.
Error
type
Running
Defrost
Timer
Protection
Outdoor unit condenser outlet (T3) sensor error
OFF
OFF
ON
ON
Outdoor temperature (T4) sensor error
OFF
OFF
Flashing
ON
AC overvoltage/under voltage protection
OFF
Flashing
OFF
ON
P6 protection
OFF
Flashing
ON
ON
Compressor protection
OFF
ON
OFF
ON
Compressor top temperature (T5) over-high
protection
OFF
ON
ON
ON
Outdoor DC fan motor error
OFF
ON
Flashing
ON
Over current protection
ON
ON
OFF
ON
12.2 Spot check
Spot
check
NO.
Content
Spot
check
NO.
Content
1
Indoor unit capacity
8
Outdoor unit condenser outlet (T3)
temperature
2
Indoor unit capacity demand
9
Outdoor temperature (T4)
temperature
3
Indoor demand after T4
amendment
10
Compressor top temperature (T5)
temperature (maximum 99 ℃ )
4
Indoor demand after T2
amendment
11
Opening of EXV
5
Indoor room temperature (T1)
temperature
12
Running frequency of
compressor
6
Indoor coil middle temperature
(T2)
13
Primary voltage/4
7
Indoor coil outlet temperature
(T2B)

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19
Part 3 Outdoor Units
1.Specification ......................................................................................20
2.Dimensions ........................................................................................21
3.Service Space ...................................................................................22
4.Wiring Diagrams ................................................................................23
5.Electric Characteristics ......................................................................24
6.Operation Limits ................................................................................24
7.Sound Levels .....................................................................................25
8.Exploded View ...................................................................................25
9.Troubleshooting .................................................................................30