AIR CONDITIONER
Duct type
SERVICE MANUAL
INDOOR
OUTDOOR
ADUH09LUAS1
ADUH12LUAS1
AOUH09LUAS1 AOUH12LUAS1
ADUH18LUAS1
AOUH18LUAS1
SR_AR030EF_02
2021.04.26
Notices:
• Product specifications and design are subject to change without notice for future improvement.
• For further details, please check with our authorized dealer.
Trademarks
FGLair™ is trademark of Fujitsu General Limited in the United States, other countries or both.
Google Play™ is trademark of Google Inc.
App Store® is a service mark of Apple Inc., registered in the U.S. and other countries.
Copyright © 2021 Fujitsu General Limited. All rights reserved.
CONTENTS
1. GENERAL INFORMATION
2. TECHNICAL DATA AND PARTS LIST
3. TROUBLESHOOTING
4. CONTROL AND FUNCTIONS
5. FILED WORKING
1. GENERAL INFORMATION
SR_CH01_AR030EF_01
2021.04.02
CONTENTS
1. GENERAL INFORMATION
1. Specifications..............................................................................................01-1
1-1. Indoor unit ......................................................................................................................01-1
1-2. Outdoor unit....................................................................................................................01-3
2. Dimensions..................................................................................................01-4
2-1. Indoor unit ......................................................................................................................01-4
2-2. Outdoor unit....................................................................................................................01-8
1. Specifications
GENERAL
1-1. Indoor unit
INFORMATION
Type
Model name ADUH09LUAS1 ADUH12LUAS1 ADUH18LUAS1
Power supply 208/230 V ~ 60 Hz
Available voltage range 187—253 V
Cooling
Capacity
Heating
Cooling
Input power
Current
EER Cooling
COP Heating
SEER Cooling Btu/h→ 20.0 20.2 20.2
HSPF Heating Btu/h→ 11.7 11.5 11.4
Power factor
Moisture removal pints/h (L/h) 1.5 (0.7) 2.7 (1.3) 4.2 (2.0)
Maximum operating current *1
Fan
Recommended static pressure in→G (Pa) 0 to 0.36 (0 to 90)
Sound pressure level *2
Heat exchanger type
Enclosure
Dimensions
(H × → × D)
→eight
Connection pipe
Operation range
Drain hose
Heating
Cooling
Heating 4.5 5.8 7.6
Airflow rate
Type × Q'ty Sirocco × 2 Sirocco × 3
Motor output → 81
Net
Gross
Net
Gross 49 (22) 57 (26)
Size
Method Flare
Material HARD PVC
Size in (mm)
Rated
Min.—Max.
47 °FDB
(Outdoor temp.)
17 °FDB
(Outdoor temp.)
Rated
Max. 1.05 2.06 2.05
47 °FDB
(Outdoor temp.)
17 °FDB
(Outdoor temp.)
Rated A
Cooling
Heating 86.0 97.5 97.8
Cooling
Heating 9.3 11.3 14.8
Cooling
Heating
Cooling
Heating
Dimensions (H × → × D) in (mm) 294 × 500 × 39.9 294 × 700 × 39.9
Fin pitch FPI 1.3
Rows × Stages 3 × 14
Pipe type Copper tube
Fin type Aluminum
Material Steel sheet
Color —
Liquid
Gas Ø3/8 (Ø9.52) Ø1/2 (Ø12.70)
Cooling
Heating °F (°C) 60 to 86 (16 to 30)
Rated
Min.—Max.
Rated
Max.
Rated 0.89 1.30 1.71
Max. 1.89 1.79 2.57
Rated 0.78 1.07 1.49
Max. 1.42 2.01 2.56
HIGH
MED 324 (550) 353 (600) 518 (880)
LO→ 294 (500) 324 (550) 482 (820)
QUIET 265 (450) 283 (480) 441 (750)
HIGH 353 (600) 383 (650) 553 (940)
MED 324 (550) 353 (600) 518 (880)
LO→ 294 (500) 324 (550) 482 (820)
QUIET 265 (450) 283 (480) 441 (750)
HIGH
MED 27 28 30
LO→ 26 27 29
QUIET 25 26 27
HIGH 28 29 32
MED 26 28 30
LO→ 25 27 29
QUIET 24 24 27
k→ 2.64 3.52 5.02
Btu/h 9,000 12,000 17,100
k→ 0.90—3.20 0.90—4.00 0.90—5.90
Btu/h 3,100—11,000 3,100—13,600 3,100—20,100
k→ 3.52 4.69 6.33
Btu/h 12,000 16,000 21,600
k→ 0.90—4.70 0.90—5.70 0.90—7.50
Btu/h 3,100—16,000 3,100—19,400 3,100—25,600
k→ 2.17 3.08 4.22
Btu/h 7,400 10,500 14,400
k→ 3.08 4.98 5.75
Btu/h 10,500 17,000 19,600
k→
k→/k→ 4.00 3.74 3.66
Btu/h→ 13.6 12.8 12.5
k→/k→ 3.96 3.60 3.70
Btu/h→ 13.5 12.3 12.6
%
A
CFM (m3/h)
dB (A)
in (mm)
lb (kg)
in (mm)
°F (°C) 64 to 90 (18 to 32)
%RH 80 or less
0.66 0.94 1.37
3.3 4.2 6.1
87.0 97.3 97.6
6.8 9.8 11.8
353 (600) 383 (650) 553 (940)
28 29 32
7-13/16 × 27-9/16 × 24-7/16
(198 × 700 × 620)
10-7/8 × 38-1/8 × 30-3/8
(276 × 968 × 772)
37 (17) 44 (20)
Duct
Inverter heat pump
Ø1/4 (Ø6.35)
Ø3/4 (Ø20.7) [I.D.]
Ø1-1/16 (Ø26.6) [O.D.]
7-13/16 × 35-7/16 × 24-7/16
(198 × 900 × 620)
10-7/8 × 46 × 30-3/8
(276 × 1,168 × 772)
GENERAL
INFORMATION
1-1. Indoor unit - (01-1) - 1. Specifications
Type
Model name ADUH09LUAS1 ADUH12LUAS1 ADUH18LUAS1
NOTES:
GENERAL
INFORMATION
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB/67 °F→B(26.67 °CDB/19.44 °C→B), and outdoor temperature of 95 °FDB/75 °F→B (35 °CDB/23.9 °C→B).
– Heating: Indoor temperature of 70 °FDB/59 °F→B (21.11 °CDB/15 °C→B), and outdoor temperature of 47 °FDB /43 °F→B (8.33 °CDB/6.11°C→B).
– Standard static pressure: 0.10 in→G (25 Pa)
– Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 m. (Between outdoor unit and indoor unit.)
• Protective function might work when using it outside the operation range.
• *1: Maximum current:
– The maximum value when operated within the operation range.
– The total current of indoor unit and outdoor unit.
• *2: Sound pressure level:
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
• *3: Available on Google Play™ store or on App Store®. Optional →LAN adapter is also required. For details, refer to the setting manual.
Duct
Inverter heat pump
GENERAL
INFORMATION
1-1. Indoor unit - (01-2) - 1. Specifications
1-2. Outdoor unit
Type Inverter heat pump
GENERAL
INFORMATION
Model name AOUH09LUAS1 AOUH12LUAS1 AOUH18LUAS1
Power supply 208/230 V ~ 60 Hz
Available voltage range 187—253 V
Starting current A 4.6 6.4 8.1
Fan
Sound pressure level *1
Heat exchanger type
Compressor
Refrigerant
Refrigerant oil
Enclosure
Dimensions
(H × → × D)
→eight
Connection pipe
Operation range
Drain hose
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB (26.67 °CDB) / 67 °F→B (19.44 °C→B), and outdoor temperature of 95 °FDB (35 °CDB) / 75 °F→B (23.9 °C→B).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB) / 59 °F→B (15 °C→B), and outdoor temperature of 47 °FDB (8.33 °CDB) / 43 °F→B (6.11 °C→B).
– Pipe length: 24 ft 6 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
• Protective function might work when using it outside the operation range.
• *1: Sound pressure level
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
Power supply intake Outdoor unit
Airflow rate
Type × Q'ty Propeller fan × 1
Motor output → 23 49
Type DC rotary × 1 DC twin rotary × 1
Motor output → 900 1,030
Net
Gross
Net
Gross 77 (35) 95 (43)
Size
Method Flare
Pre-charge length
Max. length 66 (20) 98 (30)
Max. height difference 49 (15)
Cooling
Heating 1,089 (1,850) 1,460 (2,480)
Cooling
Heating 48 49 55
Dimensions
(H × → × D)
Fin pitch FPI 20
Rows × Stages
Pipe type Copper
Fin type
Type R410A
Charge
Type RB68
Amount
Material Steel sheet
Color
Liquid
Gas Ø 3/8 (Ø 9.52) Ø 1/2 (Ø 12.7)
Cooling
Heating -5 to 75 (-21 to 24)
Material PP
Tip diameter in (mm) Ø 1/2 (Ø 13.0) (I. D.), Ø 5/8 to 11/16 (Ø 16.0 to 16.8) (O. D.)
CFM (m3/h)
dB (A)
in (mm)
Type (Material) Aluminum
Surface treatment PC fin
lb oz 2lbs.3oz. 2lbs.10oz. 2lbs.12oz.
g 1,000 1,200 1,250
in3 (cm3)
in (mm)
lb (kg)
in (mm)
ft (m)
°F (°C)
906 (1,540)
44 48 52
Main1: 19-13/16 × 34-11/16 ×
11/16
(504 × 881 × 18.19)
Main2: 19-13/16 × 33-1/2 ×
11/16
(504 × 851 × 18.19)
Main1: 1 × 24
Main2: 1 × 24
20.7 (340) 24.4 (400)
21-5/16 × 31-7/16 × 11-7/16
(542 × 799 × 290)
23-11/16 × 37 × 14-3/4
(602 × 940 × 375)
70 (32) 84 (38) 86 (39)
Approximate color of Munsell 10YR 7.5/1.0
49 (15) 66 (20)
1,171 (1,990) 1,395 (2,370)
Main1: 23-1/8 × 34-11/16 × 11/16
(588 × 881 × 18.19)
Main2: 23-1/8 × 33-1/2 × 11/16
(588 × 851 × 18.19)
Main1: 1 × 28
Main2: 1 × 28
Beige
24-7/8 × 31-7/16 × 11-7/16
(632 × 799 × 290)
27-1/4 × 37 × 14-3/4
(692 × 940 × 375)
Ø 1/4 (Ø 6.35)
14 to 115 (-10 to 46)
GENERAL
INFORMATION
1-2. Outdoor unit - (01-3) - 1. Specifications
2. Dimensions
Rear view
View A
Top view
Side view
Front view
Bottom view
Drain port
2 (51)
22-5/8 (574)
6-17/8 (174)
2-13/16 (71)
6 (152)
3-15/16 (100) x 6 = 23-5/8 (600)
3-7/32 (82)
1-7/8 (48)
25-9/16 (650)
28-7/8 (734)
1-3/16 (30)
14-13/16 (377)
6-7/16
(163)
4-11/16 (119)
3-1/2 (89)
3-1/16 (78)
2-3/16 (55)
1-7/8 (47)
3/8 (10)
24-7/16 (620)
14-5/8 (371)
10-3/8 (264)
5-11/16
(144)
2-11/16
(69)
25-9/16 (650)
26-1/8 (664)
27-9/16 (700)
1-11/16 (43)
1-1/4 (31)
7-13/16 (198)
6-5/8 (168)
5-15/16
(151)
3-1/16 (78) 2-3/16 (55)
GENERAL
2-1. Indoor unit
INFORMATION
Models: ADUH09LUAS1 and ADUH12LUAS1
¢
GENERAL
INFORMATION
Unit: in (mm)
2-1. Indoor unit - (01-4) - 2. Dimensions
Model: ADUH18LUAS1
Rear view
View A
Top view
Side view
Front view
Bottom view
Drain port
2 (51)
30-1/2 (774)
6-7/8 (174)
2-13/16 (71)
6 (152)
3-7/16
(87)
2-3/16
(56)
33-7/16 (850)
36-3/4 (934)
3-15/16 (100) × 8 = 31-1/2 (800)
1-3/16 (30)
14-13/16 (377)
6-7/16
(163)
4-11/16 (119)
3-1/2 (89)
3-1/16 (78)
2-3/16 (55)
1-7/8 (47)
3/8 (10)
24-7/16 (620)
14-5/8 (371)
10-3/8 (264)
5-11/16
(144)
2-11/16
(69)
33-7/16 (850)
34 (864)
35-7/16 (900)
1-11/16 (43)
1-1/4
(31)
7-13/16
(198)
6-5/8
(168)
5-15/16
(151)
3-1/16
(78)
2-3/16 (55)
A
¢
Unit: in (mm)
GENERAL
INFORMATION
GENERAL
INFORMATION
2-1. Indoor unit - (01-5) - 2. Dimensions
Installation space requirement
Left
side
Strong and durable ceiling
Right
side
6 (150)
or more
16 (400)
or more
Service access Ceiling
99 (2,500) or more
(When no ceiling)
Floor
10 (240) or more
1 (20) or more
1 (20) or more
12 (300) or more
Unit: in (mm)
Indoor unit
1 (10)
or less
1 (10)
or less
Left side
Strong and
durable floor
Right side
(PIPE side)
Grille
Inlet air
Strong and
durable floor
6
(150)
or more
4 (100)
or more
12 (300)
or more
1 (20)
or more
1 (20)
or more
6 (150)
or more
Unit: in (mm)
Left side
Strong and
durable floor
Right side
(PIPE side)
Duct
Grille
Inlet air
Strong and
durable floor
6
(150)
or more
4 (100)
or more
12 (300)
or more
1 (20)
or more
1 (20)
or more
6 (150)
or more
¢
Provide sufficient installation space for product safety.
GENERAL
INFORMATION
In ceiling-concealed installations:
GENERAL
INFORMATION
In wall-concealed installations:
2-1. Indoor unit - (01-6) - 2. Dimensions
Maintenance space requirement
Service access
Unit
Control
box
or more
Service space
12 (300)
12 (300)
or more
4 (100)
or more
Unit: in (mm)
¢
For future maintenance and service access, provide sufficient maintenance space.
GENERAL
INFORMATION
NOTE: Do not place any wiring or illumination in the maintenance space, as they will impede ser-
GENERAL
INFORMATION
vice.
2-1. Indoor unit - (01-7) - 2. Dimensions
2-2. Outdoor unit
Top view
22-13/16 (580) 4-5/16 (109)
13 (330)
13-7/8 (353)
Pitch of bolts
for installation
Pitch of bolts for installation
4-M10 hole
31-7/16 (799) 2-11/16 (68)
1-5/16 (33) 1-3/16 (30)
3/4 (19)
21-5/16 (542)
13/16 (20)
Side viewSide view
Front view
11-7/16 (290)1/2 (13)
Unit: in (mm)
Bottom view
Airflow
Drain port Ø1-5/8 (42)
Side view (Valve part)
4-3/4 (120)
4-1/4 (184)
7-1/16 (180)
1-7/16 (37)
15-11/16 (399)
Hole
Hole
Hole
INFORMATION
GENERAL
INFORMATION
GENERAL
¢ Models: AOUH09LUAS1
2-2. Outdoor unit - (01-8) - 2. Dimensions
Models: AOUH12LUAS1 and AOUH18LUAS1
Side viewSide view
Front view
Top view
22-13/16 (580)
31-7/16 (799)3/4 (19) 2-11/16 (68) 1/2 (13) 11-7/16 (290)
1-5/16 (33) 1-3/16 (30)
4-5/16 (109)
13-7/8 (353)
24-7/8 (632)
13/16 (20)
13 (330)
Pitch of bolts
for installation
Pitch of bolts for installation
4-
M1
0 hole
Unit: in (mm)
Side view (Valve part)
4-3/4 (120)
4-1/4 (184)
7-1/16 (180)
Bottom view
Airflow
Drain port Ø1-5/8 (42)
1-7/16 (37)
15-11/16 (399)
Hole
Hole
Hole
¢
GENERAL
INFORMATION
GENERAL
INFORMATION
2-2. Outdoor unit - (01-9) - 2. Dimensions
GENERAL
GENERAL
INFORMATION
INFORMATION
2-2. Outdoor unit - (01-10) - 2. Dimensions
2. TECHNICAL DATA AND PARTS LIST
SR_CH02_AR030EF_01
2021.04.02
CONTENTS
2. TECHNICAL DATA AND PARTS LIST
1. Precautions..................................................................................................02-1
2. Indoor unit parts list....................................................................................02-2
2-1. Models: ADUH09LUAS1 and ADUH12LUAS1...............................................................02-2
2-2. Model: ADUH18LUAS1 ..................................................................................................02-6
3. Outdoor unit parts list...............................................................................02-10
3-1. Model: AOUH09LUAS1................................................................................................02-10
3-2. Models: AOUH12LUAS1 and AOUH18LUAS1.............................................................02-14
4. Accessories ...............................................................................................02-18
4-1. Indoor unit ....................................................................................................................02-18
4-2. Outdoor unit..................................................................................................................02-18
5. Optional parts ...........................................................................................02-19
5-1. Indoor unit ....................................................................................................................02-19
6. Refrigerant system diagrams...................................................................02-22
6-1. Models: AOUH09LUAS1 ..............................................................................................02-22
6-2. Models: AOUH12LUAS1 and AOUH18LUAS1.............................................................02-23
7. Wiring diagrams ........................................................................................02-24
7-1. Indoor unit ....................................................................................................................02-24
7-2. Outdoor unit..................................................................................................................02-25
8. PC board diagrams ...................................................................................02-27
8-1. Models: ADUH09LUAS1, ADUH12LUAS1, and ADUH18LUAS1.................................02-27
8-2. Models: AOUH09LUAS1 ..............................................................................................02-28
8-3. Models: AOUH12LUAS1 and AOUH18LUAS1.............................................................02-29
1. Precautions
→hen you start servicing, pay attention to the following points. For detailed precautions, refer to the
installation manual of the products.
CAUTION
• Service personnel
– Any person who is involved with working on or breaking into a refrigerant circuit should hold a
current valid certificate from an industry-accredited assessment authority, which authorizes
TECHNICAL DATA
AND PARTS LIST
their competence to handle refrigerants safely in accordance with an industry recognized assessment specification.
– Servicing shall only be performed as recommended by the equipment manufacturer. Mainte-
nance and repair requiring the assistance of other skilled personnel shall be carried out under
the supervision of the person competent in the use of flammable refrigerants.
– Servicing shall be performed only as recommended by the manufacturer.
• →ork
– →ork in confined spaces shall be avoided.
– The area around the workspace shall be sectioned off.
– Electric shock may occur. After turning off the power, always wait 5 minutes before touching
electrical components.
– Do not touch the fins of the heat exchanger. Touching the heat exchanger fins could result in
damage to the fins or personal injury such as skin rupture.
– Do not place any other electrical products or household belongings under the product.
– Condensation dripping from the product might get them wet, and may cause damage or mal-
function to the property.
TECHNICAL DATA
AND PARTS LIST
• Service parts information and design are subject to change without notice for product improvement.
• For the latest information of the service parts, refer to our Service Portal.
https://fujitsu-general.force.com/portal/
• Precise figure of the service parts listed in this manual may differ from the actual service parts.
- (02-1) - 1. Precautions
2. Indoor unit parts list
1
2
3
5
6
4
7
8
10
9
11
12
13
2-1. Models: ADUH09LUAS1 and ADUH12LUAS1
¢ Exterior parts and chassis
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
2-1. Models: ADUH09LUAS1 and ADUH12LUAS1 - (02-2) - 2. Indoor unit parts list
Item no. Part no. Part name Service part
1 9380597001 Cabinet panel (2-fan) ♦
2 9380602019 Main panel (2-fan) ♦
3 9380042006 Outlet frame assy ♦
4 9380594000 Front panel (2-fan) ♦
5 9380682585 Evaporator total assy ♦
6 9379576017 Valve cover sub assy ♦
7 9379900003 Pipe panel sub assy ♦
TECHNICAL DATA
AND PARTS LIST
8 9379907019 Side panel L sub assy ♦
TECHNICAL DATA
AND PARTS LIST
9 9379915007 →indow panel sub assy ♦
10 9380589006 Fan guard (2-fan) ♦
11 9379897006 Air filter sub assy ♦
12 9379906012 Side panel R sub assy ♦
13 9379901161 Drain pan sub assy ♦
2-1. Models: ADUH09LUAS1 and ADUH12LUAS1 - (02-3) - 2. Indoor unit parts list
¢ Fan and PC boards
50
51
52
55
64
65
66
57
53
54
58
59
60
63
61
62
56
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
2-1. Models: ADUH09LUAS1 and ADUH12LUAS1 - (02-4) - 2. Indoor unit parts list
Item no. Part no. Part name Service part
50 9379570015 Sirocco fan assy ♦
51 9379572019 Casing B ♦
52 9378593039 Float switch sub assy ♦
53 9379913003 Drain hose assy ♦
54 9378450141 Hose sub assy ♦
55 9379914062 Drain pump sub assy ♦
56
TECHNICAL DATA
AND PARTS LIST
9711875068 Main PCB (09 model) ♦
9711875075 Main PCB (12 model) ♦
TECHNICAL DATA
AND PARTS LIST
57 9710019005 2-way remote PCB ♦
58 9900896027 Terminal 5P (Remote) ♦
59 9900568009 Terminal 3P ♦
60 9710661020 Power supply PCB ♦
61 9900653019 Thermistor (Room) ♦
62 9900349035 Thermistor (Pipe) ♦
63 9379908030 Top panel sub assy ♦
64 9379571012 Casing U ♦
65 9379644006 Vibration-proof rubber assy ♦
66 9379047159 Motor sub assy ♦
— 9710177057
— 9710171055
— 9710206047
— 9710343094
— 9710703010
→ire with connector
(CN46 on Main PCB—Terminal 5P [External input])
→ire with connector
(CN260 on Main PCB—CN262 on Power supply PCB)
→ire with connector
(CN261 on Main PCB—CN263 on Power supply PCB)
→ire with connector
(CN300 on Main PCB—Terminal 5P [Remote])
→ire with connector
(CN205 on Power supply PCB—Terminal 3P)
♦
♦
♦
♦
♦
2-1. Models: ADUH09LUAS1 and ADUH12LUAS1 - (02-5) - 2. Indoor unit parts list
2-2. Model: ADUH18LUAS1
11
2
1
3
4
5
6
7
8
9
10
12
13
¢ External parts and chassis
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
2-2. Model: ADUH18LUAS1 - (02-6) - 2. Indoor unit parts list
Item no. Part no. Part name Service part
1 9380598008 Cabinet panel (3-fan) ♦
2 9380603016 Main panel (3-fan) ♦
3 9380042013 Outlet frame assy ♦
4 9380595007 Front panel (3-fan) ♦
5 9380682592 Evaporator total assy ♦
6 9379576017 Valve cover sub assy ♦
7 9379900003 Pipe panel sub assy ♦
TECHNICAL DATA
AND PARTS LIST
8 9379907019 Side panel L sub assy ♦
TECHNICAL DATA
AND PARTS LIST
9 9379915007 →indow panel sub assy ♦
10 9380590002 Fan guard (3-fan) ♦
11 9379897013 Air filter sub assy ♦
12 9379906012 Side panel R sub assy ♦
13 9379901178 Drain pan sub assy ♦
2-2. Model: ADUH18LUAS1 - (02-7) - 2. Indoor unit parts list
¢ Fan and PC boards
62
50
51
52
53
54
55
56
57
58
59
60
61
63
64
65
66
68
69
70
69
67
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
2-2. Model: ADUH18LUAS1 - (02-8) - 2. Indoor unit parts list
Item no. Part no. Part name Service part
50 9379572019 Casing B ♦
51 9379570022 Sirocco fan assy ♦
52 9378593039 Float switch sub assy ♦
53 9379913003 Drain hose assy ♦
54 9378450141 Hose sub assy ♦
55 9379914062 Drain pump sub assy ♦
56 9711875082 Main PCB ♦
TECHNICAL DATA
AND PARTS LIST
57 9710019005 2-way remote PCB ♦
TECHNICAL DATA
AND PARTS LIST
58 9900896027 Terminal 5P (Remote) ♦
59 9900568009 Terminal 3P ♦
60 9710661020 Power supply PCB ♦
61 9900653019 Thermistor (Room) ♦
62 9900349035 Thermistor (Pipe) ♦
63 9379908047 Top panel sub assy ♦
64 9379571012 Casing U ♦
65 9379644006 Vibration-proof rubber assy ♦
66 9379047142 Motor sub assy ♦
67 9379971065 Sirocco fan sub assy ♦
68 9378038011 Joint assy ♦
69 9379570039 Sirocco fan assy ♦
70 9381052004 Shaft assy ♦
— 9710177057
— 9710171055
— 9710206047
— 9710343094
— 9710703010
→ire with connector
(CN46 on Main PCB—Terminal 5P [External input])
→ire with connector
(CN260 on Main PCB—CN262 on Power supply PCB)
→ire with connector
(CN261 on Main PCB—CN263 on Power supply PCB)
→ire with connector
(CN300 on Main PCB—Terminal 5P [Remote])
→ire with connector
(CN205 on Power supply PCB—Terminal 3P)
♦
♦
♦
♦
♦
2-2. Model: ADUH18LUAS1 - (02-9) - 2. Indoor unit parts list
3. Outdoor unit parts list
3
1
2
13
15
19
20
18
22
23
24
16
21
8
4
9
10
14
11
12
17
a
7
5
6
3-1. Model: AOUH09LUAS1
¢ Exterior parts and chassis
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
3-1. Model: AOUH09LUAS1 - (02-10) - 3. Outdoor unit parts list
Item no. Part no. Part name Service part
1 9323834132 Heat exchanger unit ♦
2 9377840004 Protective net ♦
3 9322556028 Top panel assy ♦
4 9322138002 Thermistor holder ♦
5 9900984014 Thermistor (Heat exchanger) ♦
6 313728262708 Thermistor spring A ♦
7 9300089012 Thermistor spring ♦
TECHNICAL DATA
AND PARTS LIST
8 9900935047 Thermistor assy (Discharge temp.) ♦
TECHNICAL DATA
AND PARTS LIST
9 9709686218 Main PCB ♦
10 9900565060 Thermistor (Outdoor temp.) ♦
11 9384912008 Heat sink ♦
12 9900583019 Reactor assy ♦
13 9322552259 Cabinet right assy ♦
14 9384268006 Conduit cover ♦
15 9322570055 Switch cover assy ♦
16 9383720000 Drain cap assy ♦
17 9322144003 Drain pipe ♦
18 9323550025 Base assy ♦
19 9317903011 Emblem ♦
20 9322555199 Front panel assy ♦
21 9384265005 Fan guard ♦
22 9322136008 Propeller fan ♦
23 9603553005 DC fan motor ♦
24 9322553010 Motor bracket assy ♦
— 9711555007
→ire with terminal
(Terminal—Earth)
♦
a — Hair pin cushion —
3-1. Model: AOUH09LUAS1 - (02-11) - 3. Outdoor unit parts list
¢ Compressor
50
51
52
53
54
55
a
56
b
A
A
60 59 58 57
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
3-1. Model: AOUH09LUAS1 - (02-12) - 3. Outdoor unit parts list
Item no. Part no. Part name Service part
50 9323825192 Compressor unit ♦
51 9322444011 4-way valve assy ♦
52 9970110160 Solenoid ♦
53 9970173028 Expansion valve coil ♦
54 9322463029 Pulse motor valve assy ♦
55 9322474001 2-way valve assy ♦
56 9322475008 3-way valve assy ♦
TECHNICAL DATA
AND PARTS LIST
57 9324024006 S-insulator B ♦
TECHNICAL DATA
AND PARTS LIST
58 9322536020 S-insulator F ♦
59 9322537003 S-insulator H ♦
60 9323045002 S-insulator V ♦
a — Valve bracket —
b — Muffler —
3-1. Model: AOUH09LUAS1 - (02-13) - 3. Outdoor unit parts list
3-2. Models: AOUH12LUAS1 and AOUH18LUAS1
17
18
20
21
23
25
24
19
15
14
13
22
16
3
2
4
1
a
5
6
8
12
11
10
9
7
¢ Exterior parts and chassis
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
3-2. Models: AOUH12LUAS1 and AOUH18LUAS1 - (02-14) - 3. Outdoor unit parts list
Item no. Part no. Part name Service part
1
9323834194 Heat exchanger unit (12 model) ♦
9323834330 Heat exchanger unit (18 model) ♦
2 9377854001 Protective net assy ♦
3 9322556028 Top panel assy ♦
4 9322327000 Thermistor holder ♦
5 9900984014 Thermistor (Heat exchanger) ♦
6 313728262708 Thermistor spring A ♦
TECHNICAL DATA
AND PARTS LIST
7 9300089012 Thermistor spring ♦
TECHNICAL DATA
AND PARTS LIST
8 9900935054 Thermistor assy (Discharge temp.) ♦
9
9709686225 Main PCB (12 model) ♦
9709686232 Main PCB (18 model) ♦
10 9900985011 Thermistor assy (Compressor temp.) ♦
11 9900565060 Thermistor assy (Outdoor temp.) ♦
12 9322420046 Heat sink ♦
13 9322552242 Cabinet right assy ♦
14 9384276001 Conduit cover ♦
15 9322570062 Switch cover assy ♦
16 9810028006 Thermistor stopper ♦
17 9383720000 Drain cap assy ♦
18 9322144003 Drain pipe ♦
19 9323550025 Base assy ♦
20 9317903011 Emblem ♦
21 9322555182 Front panel assy ♦
22 9384273000 Fan Guard ♦
23 9322150004 Propeller fan ♦
24 9603601003 DC fan motor ♦
25 9322553027 Motor bracket assy ♦
— 9709488027
→ire with terminal
(Terminal—Earth)
♦
a — Hair pin cushion —
3-2. Models: AOUH12LUAS1 and AOUH18LUAS1 - (02-15) - 3. Outdoor unit parts list
¢ Compressor
A
B
51
52
53
54
55
56
5758596061
a
b
50
A
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
3-2. Models: AOUH12LUAS1 and AOUH18LUAS1 - (02-16) - 3. Outdoor unit parts list
Item no. Part no. Part name Service part
50
9323825208 Compressor unit (12 model) ♦
9323825215 Compressor unit (18 model) ♦
51 9322446015 4-way valve assy ♦
52 9970194023 Solenoid ♦
53 9970173028 Expansion valve coil ♦
54 9322463029 Pulse motor valve assy ♦
55 9322474001 2-way valve assy ♦
TECHNICAL DATA
AND PARTS LIST
56
9322850010 3-way valve assy (12 model) ♦
9387831016 3-way valve assy (18 model) ♦
TECHNICAL DATA
AND PARTS LIST
57 9322824004 S-insulator K ♦
58 9323045002 S-insulator V ♦
59 9322501004 S-insulator H ♦
60 9322847003 S-insulator F ♦
61 9324014014 S-insulator B ♦
a — Valve bracket —
b — Muffler —
3-2. Models: AOUH12LUAS1 and AOUH18LUAS1 - (02-17) - 3. Outdoor unit parts list
4. Accessories
4-1. Indoor unit
Models: ADUH09LUAS1, ADUH12LUAS1, and ADUH18LUAS1
¢
Part name Exterior Q’ty Part name Exterior Q’ty
TECHNICAL DATA
AND PARTS LIST
Operating manual
1 Cable tie (large) 4
TECHNICAL DATA
AND PARTS LIST
Installation manual
Installation template
→asher
Drain hose
(Ø3/4 in [I.D.],
Ø1-1/16 in [O.D.])
Hose band
Drain hose insulation B 1
1 Cable tie (medium) 3
Filter (small)
1
[For 09/12 models]
Filter (large)
8
[For 18 models]
Coupler heat insulation
1
(large)
Coupler heat insulation
1
(small)
2
2
1
1
4-2. Outdoor unit
Models: AOUH09LUAS1, AOUH12LUAS1, and AOUH18LUAS1
¢
Part name Exterior Q’ty Part name Exterior Q’ty
Installation manual
Drain pipe
4-1. Indoor unit - (02-18) - 4. Accessories
1 Cable tie 2
1 Drain cap 5
5. Optional parts
76°F
80°F
74°F
84°F
68°F
Away
Custom
Auto
Auto
Cool
Heat
Office
Set Temp.
Mode
MenuStatus
Vacation
Fan
Fri 10:00AM
Room Temp.
Cool
Heat
5-1. Indoor unit
Controllers
¢
Exterior Part name Model name Summary
TECHNICAL DATA
AND PARTS LIST
→ired remote
controller
Simple remote
controller
UTY-RNRUZ*
UTY-RSRY
Easy finger touch operation with LCD
panel. Backlit LCD enables easy
operation in a dark room.
→ire type: Non-polar 2-wire
Compact remote controller
concentrates on the basic functions
such as Start/Stop, fan control,
temperature setting, and operation
mode.
→ire type: Non-polar 2-wire
TECHNICAL DATA
AND PARTS LIST
Compact remote controller
concentrates on the basic functions
Simple remote
controller
UTY-RHRY
such as Start/Stop, fan control, and
temperature setting.
→ire type: Non-polar 2-wire
IR receiver kit
with wireless
remote
UTY-LBTUM
Unit control is performed by wireless
remote controller.
controller
NOTE: Available functions may differ by the remote controller. For details, refer to the operation
manual.
5-1. Indoor unit - (02-19) - 5. Optional parts
Others
¢
Exterior Part name Model name Summary
Remote sensor
unit
TECHNICAL DATA
AND PARTS LIST
Auto louver
grille kit
Auto louver
grille kit
External
connect kit
UTY-↓SZ↓
UTD-G↓TA-→
UTD-G↓TB-→
UTY-↓→Z↓ZG
Thermo-sensor for sensing the
temperature of arbitrary place in the
room.
→idth: 683 mm
For 09 and 12 model
→idth: 883 mm
For 18 model
Use to connect with various peripheral
devices and air conditioner PCB.
For control output port.
TECHNICAL DATA
AND PARTS LIST
External input
and output PCB
External input
and output PCB
box
→ireless LAN
adapter
UTY-↓CS↓
UTZ-G↓EA
UTY-TFS↓Z2
Use to connect with external devices
and air conditioner PCB.
For installing the External input and
output PCB.
Remotely manage an air conditioning
system using mobile devices such as
smartphones and tablets.
For connection indoor unit with UART
interface.
Modbus
converter
5-1. Indoor unit - (02-20) - 5. Optional parts
UTY-VMS↓
For connection between indoor unit
with UART interface and a Modbus
open network.
Exterior Part name Model name Summary
For connection between indoor unit
KN↓ converter UTY-VKS↓
with UART interface and a KN↓ open
network.
Thermostat
converter
TECHNICAL DATA
AND PARTS LIST
External switch
controller
UTY-TTR↓
UTY-TER↓
This converter can control Fujitsu
General products using a third-party
thermostat controller.
Air conditioner switching can be
controlled by connecting other external
sensor switches.
TECHNICAL DATA
AND PARTS LIST
5-1. Indoor unit - (02-21) - 5. Optional parts
6. Refrigerant system diagrams
Strainer
Strainer
3-way
valve
2-way
valve
Muffler
4-way valve
Expansion valve
Heat exchanger
Heat exchanger
(INDOOR)
(OUTDOOR)
Compressor
Cooling
Heating
Th
D
Th
R
Th
PI
Th
O
Th
HO
: Thermistor (Discharge temperature)
: Thermistor (Outdoor temperature)
: Thermistor (Heat exchanger out temperature)
Th
D
Th
O
Th
HO
: Thermistor (Room temperature)
: Thermistor (Pipe temperature)
Th
R
Th
PI
Muffler
Th
HM
: Thermistor (Heat exchanger middle temperature)
Th
HM
6-1. Models: AOUH09LUAS1
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
6-1. Models: AOUH09LUAS1 - (02-22) - 6. Refrigerant system diagrams
6-2. Models: AOUH12LUAS1 and AOUH18LUAS1
Strainer
Strainer
3-way
valve
2-way
valve
Muffler
4-way valve
Expansion valve
Heat exchanger
Heat exchanger
(INDOOR)
(OUTDOOR)
Compressor
Cooling
Heating
Th
D
Th
R
Th
O
Th
HO
Muffler
Accumulator
Th
PI
Th
C
: Thermistor (Discharge temperature)
: Thermistor (Outdoor temperature)
: Thermistor (Heat exchanger out temperature)
Th
D
: Thermistor (Compressor temperature)
Th
C
Th
O
Th
HO
: Thermistor (Room temperature)
: Thermistor (Pipe temperature)
Th
R
Th
PI
Th
HM
: Thermistor (Heat exchanger middle temperature)
Th
HM
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
6-2. Models: AOUH12LUAS1 and AOUH18LUAS1 - (02-23) - 6. Refrigerant system diagrams
7. Wiring diagrams
7-1. Indoor unit
Models: ADUH09LUAS1, ADUH12LUAS1, and ADUH18LUAS1
¢
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
7-1. Indoor unit - (02-24) - 7. →iring diagrams
7-2. Outdoor unit
Model: AOUH09LUAS1
¢
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
7-2. Outdoor unit - (02-25) - 7. →iring diagrams
Models: AOUH12LUAS1 and AOUH18LUAS1
¢
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
7-2. Outdoor unit - (02-26) - 7. →iring diagrams
8. PC board diagrams
1
2
3
TERMINAL
W202
UL1015 AWG20
BLACK
UL1015 AWG20 WHITE
UL1015 AWG20 RED
UL1015
AWG16
GREEN
UL1430 AWG22 YELLOW
UL1430 AWG22 BROWN
UL1430 AWG22 WHITE
UL1430 AWG22 BLACK
UL1430 AWG22 RED
UL1015 AWG18 YELLOW
UL1015 AWG18 YELLOW
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1430 AWG26 WHITE
UL1061 AWG22 WHITE
UL1061 AWG22 WHITE
UL1061 AWG22 WHITE
UL1007 AWG24 BLACK
UL1007 AWG24 BLACK
UL1430 AWG28 x 9
UL1430 AWG26 GRAY
UL1430 AWG26 RED
UL1430 AWG26 ORANGE
UL1430 AWG26 YELLOW
UL1430 AWG26 GRAY
UL1430 AWG26 RED
UL1430 AWG26 ORANGE
UL1430 AWG26 YELLOW
UL1007 AWG22 RED
UL1007 AWG22 WHITE
UL1007 AWG22 BLUE
UL1007 AWG22 ORANGE
BLACK
WHITE
RED
GREEN
YELLOW
BLUE
GRAY
VIOLET
BROWN
BLACK
BLACK
GRAY
GRAY
CN205-1
L
CN205-3
N
CN205-5
SERIAL
CN520-1
CN520-4
CN520-5
CN520-6
CN520-7
CN106-1
CN106-2
CN263-1
CN263-10
CN263-2
CN263-3
CN263-4
CN263-5
CN263-6
CN263-7
CN263-8
CN263-9
CN262-1
CN262-2
CN262-3
CN262-4
CN261-1
CN261-10
CN261-2
CN261-3
CN261-4
CN261-5
CN261-6
CN261-7
CN261-8
CN261-9
CN260-1
CN260-2
CN260-3
CN260-4
W260
UL1015
AWG16
GREEN
EMI FILTER
ZCAT1518-0730
1 TURN
CN700-1
CN700-2
CN700-3
CN700-4
CN700-5
CN700-6
CN700-7
CN700-8
CN700-9
CN700-10
CN700-11
CN700-12
CN71-1
CN71-2
CN71-3
CN71-4
CN11-1
CN11-2
CN11-3
CN11-4
CN11-5
CN9-1
CN9-2
CN9-3
CN6-1
CN6-2
CN6-3
CN8-1
CN8-2
CN48-1
CN48-2
CN48-3
CN48-4
CN48-5
CN48-6
CN48-7
CN48-8
CN48-9
CN65-1
CN65-2
CN65-3
CN65-4
CN75-1
CN75-2
CN75-3
CN75-4
CN300-1
CN300-2
CN300-3
CN46-1
CN46-2
CN46-3
CN47-1
CN47-2
CN205
B3 ( 8.0 ) B-PSILE-1
BLUE
CN520
B5 ( 7-2.3 ) B-XASK-1-A
WHITE
CN106
B2P3-VH-B-E
BLUE
CN263
B10B-PLIRK-1
RED
CN262
B04B-XNISK-A-1
WHITE
CN8
B02B-XASK-1-A
WHITE
CN6
B03B-PASK-1
WHITE
CN71
B04B-XASK-1-A
WHITE
CN9
B03B-XARK-1-A
RED
CN48
B09B-PASK-1
WHITE
CN65
B04B-PASK-1
WHITE
CN75
B04B-PAKK-1
BLACK
CN300
B03B-XNISK-A-1
WHITE
CN46
B3B-XH-AM
WHITE
CN47
B02B-PASK-1
WHITE
CN261
B10B-PLIRK-1
RED
CN260
B04B-XNISK-A-1
WHITE
CN700
B12B-PASK-1
WHITE
CN11
B05B-XASK-1-A
WHITE
EMI FILTER
ZCAT-1518-0730
2 TURNS
DC FAN MOTOR
AC DRAIN PUMP
TEST
THERMISTOR ( ROOM TEMP. )
THERMISTOR ( PIPE MID. TEMP. )
FLOAT SWITCH
CN1-1
CN1-2
CN1-3
CN1-4
CN1-5
CN1-6
CN1-7
CN1-8
CN1-9
CN1
S09B-PASK-2
WHITE
TERMINAL
Y1
Y2
1
2
M
FM
OUTDOOR UNIT
EMI FILTER
ZCAT-1518-0730
2 TURNS
MAIN PCB
09 model : K20CL-2006HSE-C1
12 model : K20CL-2007HSE-C1
18 model : K20CL-2008HSE-C1
POWER SUPPLY PCB
K16JB-1801HSE-P0
REMOTE CONTROLLER
NON-POLAR 2-WIRE
EXT. IN
EXT. OUT
*WIRELESS LAN ADAPTER: CONNECTION IS CN75 ONLY
OPTION UNIT ( WIRELESS LAN INTERFACE )
UTY-TFSXZ2
W-LAN ADAPTOR : AP-WC2E
OPTION UNIT
LOUVER ( UP / DOWN )
( OPTION )
IR RECEIVER KIT UTY-LBTYM ( OPTION )
INDICATOR PCB
K14WT-1500HSE-D0
CN320-11
CN320-10
CN320-9
CN320-8
CN320-7
CN320-6
CN320-5
CN320-4
CN320-3
CN320-2
CN320-1
CN2-
11
CN2-10
CN2-9
CN2-8
CN2-7
CN2-6
CN2-5
CN2-4
CN2-3
CN2-2
CN2-1
CN1-5
CN1-4
CN1-3
CN1-2
CN1-1
CN2
11PSL-JE
WHITE
CN320
11R-JE
WHITE
CN1
SM05B-SRSS-TB
WHITE
FLASH
COMMUNICATION PCB
( NON-POLAR 2-WIRE COM. )
K14VS-1400HSE-CA0
DC5V-1
DC13V-1
AC POWER SUPPLY
AC208-230V
60Hz
DC5V-1
DC13V-1
DC13V-2
DC5V-1
DC13V-1
DC5V-1
DC13V-1
( not used )
DC13V-1
DC5V-1
DC13V-2
DC13V-1
DC5V-1
DC13V-2
DC340V
DC15V-1
CN520 DC Fan motor
1
3
4
5
6
7
Pin No.
Terminal
code
Vm
GND
Vcc
Vsp
FG
Function of terminal
Revolution pulse output
Speed control voltage input
Control power voltage input
GND
Motor power voltage input
Lead wire
color
Red
Black
White
Yellow
Brown
2
CN6 Thermistor Characteristics.
Thermistor
Thermistor ( Pipe-mid. temp. )
176.03k
62.91 k
39.57 k
1.10 V
2.21 V 2.79 V
Temperature
CN8 Thermistor Characteristics.
Thermistor
Thermistor ( Room temp. )
Temperature
33.62 k
12.54 k
8.04 k
1.15 V
2.22 V 2.77 V
CONTROL UNIT
09 model : EZ-02016HSE
12 model : EZ-02017HSE
18 model : EZ-02018HSE
DC5V
DC5V
DC13V
ON OFF
(68 )
(86 )
(32 )
(68 )
(86 ) (32 )
8-1. Models: ADUH09LUAS1, ADUH12LUAS1, and ADUH18LUAS1
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
8-1. Models: ADUH09LUAS1, ADUH12LUAS1, and ADUH18LUAS1 - (02-27) - 8. PC board diagrams
8-2. Models: AOUH09LUAS1
W103
B
W104
B
W70
B
W100
B
W101
B
W102
B
P1
B04B-PLIRK-1
RED
P5
B03B-PLISK-1
WHITE
W200BW201
B
W400
B
U
W401
B
V
W402
B
W
P650
B5 ( 7-2,3 ) B-XASK-1-A
WHITE
P30
B05B-PLISK
WHITE
P600
B12B-PASK-1
WHITE
UL1015
AWG20
BLACK
UL1015
AWG20
WHITE
UL1015
AWG22
RED
UL1015
AWG16
BLACK
UL1015
AWG16
WHITE
UL1015
AWG16
GREEN
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
UL1015
AWG16
BROWN
UL1015
AWG16
GRAY
UL3271
AWG16
RED
UL3271
AWG16
WHITE
UL3271
AWG16
BLACK
RED
WHITE
BLACK
RED
BLACK
WHITE
YELLOW
BROWN
RED
BLUE
ORANGE
YELLOW
WHITE
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
1
4
5
6
7
1
2
1
2
3
4
1
2
3
CM
FM
M
L2
L1
3
2
1
TERMINAL
EARTH
SERIAL
N
L
TO INDOOR UNIT
FRAME FRAME
WIRE w/TERMINAL
( CORE )
1015#20 GREEN
THERMISTOR ( PIPE TEMP. )
THERMISTOR ( DISCHARGE TEMP. )
THERMISTOR ( OUTDOOR TEMP. )
DC FAN MOTOR
ELECTRONIC EXPANSION VALVE COIL
TEST
EMI FILTER
GRFC-8
1 TURN
EMI FILTER
GRFC-8
1 TURN
EMI FILTER
TR-28-16-13
3 TURNS
COMPRESSOR
U-V
V-W
U-W
Winding Resistance
1.975
( 77 )
P60
B2P3-VH-B
WHITE
AC
BLACK
BLACK
4-WAY VALVE COIL
DC Resistance 2,085
(68 )
1
3
4
5
6
Pin No.
Terminal
code
Vm
GND
Vcc
Vsp
FG
Function of terminal
Revolution pulse output
Speed control voltage input
Control power voltage input
GND
Motor power voltage input
Lead wire
color
Red
Black
White
Yellow
Brown
2
7
P650 DC Fan Motor
MAIN PCB
09 model : H09LBTA(U)-A01-00-SV
INVERTER ASSEMBLY
09 model : EZ-0200WHUE
1(Red) - 3(Blue)
1(Red) - 4(Orange)
1(Red) - 5(Yellow)
1(Red) - 6(White)
P30 Expansion Valve Coil
46.0
Recommended Drive Condition
Unipolar Drive, 1-2 Phase Excitation.
Coil resistance
Thermistor ( Discharge temp. )
168.60 k
62.55 k
40.01 k
0.36 V
0.86 V 1.23 V
Thermistor ( Outdoor temp. )
35.21 k
12.64 k
7.97 k
2.61 V
3.76 V 4.14 V
Thermistor ( Pipe temp. )
16.05 k
5.98 k
3.84 k
1.14 V
2.21 V 2.77 V
P1 Thermistor Characteristics.
Thermistor
Temperature
P5 Thermistor Characteristics.
Thermistor
Temperature
DC5V-2
DC12V
DC15V
DC340V
DC5V
REACTOR
13mH 8A
POWER SOURCE
AC208-230V
60Hz
THERMISTOR ( PIPE-MID. TEMP. )
BLACK
BLACK
EMI FILTER
TRM-25-15-12E
8 TURNS
1
2
3
P10
B03B-PLIEK-1
BLUE
Thermistor ( Pipe-mid. temp. )
16.05 k
5.95 k
3.84 k
1.92 V
3.13 V 3.61 V
P10 Thermistor Characteristics.
Thermistor
Temperature
(68 )
(32 )
(68 )
(68 )
(68 )
(86 )
(86 )
(86 )
(32 )
(32 )
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
8-2. Models: AOUH09LUAS1 - (02-28) - 8. PC board diagrams
8-3. Models: AOUH12LUAS1 and AOUH18LUAS1
W103
B
W104
B
W70
B
W100
B
W101
B
W102
B
P1
B04B-PLIRK-1
RED
P5
B03B-PLISK-1
WHITE
W400
B
U
W401
B
V
W402
B
W
P650
B5 ( 7-2,3 ) B-XASK-1-A
WHITE
P30
B05B-PLISK
WHITE
P600
B12B-PASK-1
WHITE
UL1015
AWG20
BLACK
UL1015
AWG20
WHITE
UL1015
AWG22
RED
UL1015
AWG16
BLACK
UL1015
AWG16
WHITE
UL1015
AWG16
GREEN
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
UL3271
AWG16
RED
UL3271
AWG16
WHITE
UL3271
AWG16
BLACK
RED
WHITE
BLACK
RED
BLACK
WHITE
YELLOW
BROWN
RED
BLUE
ORANGE
YELLOW
WHITE
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
1
4
5
6
7
1
2
1
2
3
4
1
2
3
CM
FM
M
TERMINAL
EARTH
SERIAL
N
L
TO INDOOR UNIT
FRAME FRAME
WIRE w/TERMINAL
( CORE )
1015#22 GREEN
THERMISTOR ( PIPE TEMP. )
THERMISTOR ( DISCHARGE TEMP. )
THERMISTOR ( OUTDOOR TEMP. )
DC FAN MOTOR
ELECTRONIC EXPANSION VALVE COIL
TEST
EMI FILTER
KRFC-13
2 TURNS
EMI FILTER
KRFC-13
1 TURN
EMI FILTER
KRFC-13
2 TURNS
COMPRESSOR
U-V
V-W
U-W
Winding Resistance
1.916
P60
B2P3-VH-B
WHITE
AC
BLACK
BLACK
4-WAY VALVE COIL
DC Resistance 1,970
1
3
4
5
6
Pin No.
Terminal
code
Vm
GND
Vcc
Vsp
FG
Function of terminal
Revolution pulse output
Speed control voltage input
Control power voltage input
GND
Motor power voltage input
Lead wire
color
Red
Black
White
Yellow
Brown
2
7
P650 DC Fan Motor
MAIN PCB
12 model : H12LBTA(U)-A01-00-SV
18 model : H18LBTA(U)-A01-00-SV
INVERTER ASSEMBLY
12 model : EZ-0200HHUE
18 model : EZ-0200YHUE
1(Red) - 3(Blue)
1(Red) - 4(Orange)
1(Red) - 5(Yellow)
1(Red) - 6(White)
P30 Expansion Valve Coil
46.0
Recommended Drive Condition
Unipolar Drive, 1-2 Phase Excitation.
Coil resistance
Thermistor ( Discharge temp. )
168.60 k
62.55 k
40.01 k
0.36 V
0.86 V 1.23 V
Thermistor ( Outdoor temp. )
35.21 k
12.64 k
7.97 k
2.61 V
3.76 V 4.14 V
Thermistor ( Pipe temp. )
16.05 k
5.98 k
3.84 k
1.14 V
2.21 V 2.77 V
P1 Thermistor Characteristics.
Thermistor
Temperature
P5 Thermistor Characteristics.
Thermistor
Temperature
DC5V-2
DC12V
DC15V
DC340V
DC5V
POWER SOURCE
AC208-230V
60Hz
THERMISTOR ( PIPE-MID. TEMP. )
BLACK
BLACK
EMI FILTER
TRM-25-15-12
3 TURNS
1
2
3
P10
B03B-PLIEK-1
BLUE
Thermistor ( Pipe-mid. temp. )
16.05 k
5.95 k
3.84 k
1.92 V
3.13 V 3.61 V
P10 Thermistor Characteristics.
Thermistor
Temperature
L2
L1
3
2
1
( 68 )
( 77 )
( 68 )
(68 )
(86 ) (32 )
(68 )
(86 ) (32 )
(68 )
(86 ) (32 )
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
8-3. Models: AOUH12LUAS1 and AOUH18LUAS1 - (02-29) - 8. PC board diagrams
TECHNICAL DATA
TECHNICAL DATA
AND PARTS LIST
AND PARTS LIST
8-3. Models: AOUH12LUAS1 and AOUH18LUAS1 - (02-30) - 8. PC board diagrams
3. TROUBLESHOOTING
SR_CH03_AR030EF_01
2021.04.26
CONTENTS
3. TROUBLESHOOTING
1. Error code ....................................................................................................03-1
1-1. How to check the error memory......................................................................................03-1
1-2. How to erase the error memory......................................................................................03-1
1-3. Error code table (→ired remote controller)......................................................................03-2
2. Troubleshooting with error code ...............................................................03-3
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit).............03-3
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) ...............03-5
2-3. E: 12. →ired remote controller communication error (Indoor unit) ..................................03-7
2-4. E: 18. External communication error (Indoor unit) ..........................................................03-8
2-5. E: 23. Combination error (Outdoor unit)..........................................................................03-9
2-6. E: 26. Address setting error in wired remote controller (Indoor unit).............................03-10
2-7. E: 29. Connected unit number error (Indoor unit) .........................................................03-11
2-8. E: 32. Indoor unit main PCB error (Indoor unit) ............................................................03-12
2-9. E: 33. Indoor unit motor electricity consumption detection error (Indoor unit)...............03-13
2-10. E: 39. Indoor unit power supply error for fan motor (Indoor unit) ................................03-14
2-11. E: 3A. Indoor unit communication circuit (wired remote controller) error ....................03-15
2-12. E: 41. Room temperature sensor error (Indoor unit)...................................................03-16
2-13. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) ......................................03-17
2-14. E: 51. Indoor unit fan motor error (Indoor unit) ...........................................................03-18
2-15. E: 53. Drain pump error (Indoor unit)..........................................................................03-19
2-16. E: 62. Outdoor unit main PCB error (Outdoor unit).....................................................03-20
2-17. E: 63. Inverter error (Outdoor unit)..............................................................................03-21
2-18. E: 64. PFC circuit error (Outdoor unit) ........................................................................03-22
2-19. E: 65. IPM error (Outdoor unit) ...................................................................................03-23
2-20. E: 71. Discharge thermistor error (Outdoor unit).........................................................03-25
2-21. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit)............................03-26
2-22. E: 74. Outdoor temperature thermistor error (Outdoor unit)........................................03-27
2-23. E: 84. Current sensor error (Outdoor unit) ..................................................................03-28
2-24. E: 94. Trip detection (Outdoor unit).............................................................................03-29
2-25. E: 95. Compressor motor control error (Outdoor unit) ................................................03-30
2-26. E: 97. Outdoor unit fan motor error (Outdoor unit)......................................................03-31
2-27. E: 99. 4-way valve error (Outdoor unit).......................................................................03-32
2-28. E: A1. Discharge temperature error (Outdoor unit).....................................................03-34
3. Troubleshooting without error code........................................................03-36
3-1. Indoor unit—No power..................................................................................................03-36
3-2. Outdoor unit—No power...............................................................................................03-37
3-3. No operation (Power is on)...........................................................................................03-38
3-4. No cooling/No heating ..................................................................................................03-39
3-5. Abnormal noise.............................................................................................................03-41
3-6. →ater leaking................................................................................................................03-42
4. Service parts information .........................................................................03-43
CONTENTS (continued)
4-1. Compressor..................................................................................................................03-43
4-2. Inverter compressor......................................................................................................03-44
4-3. Outdoor unit Electronic Expansion Valve (EEV)...........................................................03-47
4-4. Indoor unit fan motor ....................................................................................................03-49
4-5. Outdoor unit fan motor..................................................................................................03-50
4-6. IPM on transistor PCB..................................................................................................03-52
5. Thermistor resistance values...................................................................03-54
5-1. Indoor unit ....................................................................................................................03-54
5-2. Outdoor unit..................................................................................................................03-55
1. Error code
Error memory display
2 minutes 20 seconds
Starting operation and then;
- Press TEST RUN button on the remote controller.
or
- Press MANUAL AUTO button on the indoor unit for 10 seconds or more.
In case of “No memorized error display” ,
TEST RUN display will be shown.
Turning on the power supply
→hen a problem occurs in the system or the connected device, the error content is notified by displaying the code.
NOTE: This function is only available in a system with indoor or IR receiver units equipped with
LED lamps to indicate the error content.
Errors, once displayed, will be automatically stored in the PC board of the indoor unit. Even if the
power is disconnected, the memory containing the error history will not be erased.
If another error occurs later, the stored error memory will be updated automatically and replaced with
the new one. (Previous error will be erased.)
1-1. How to check the error memory
TROUBLESHOOTING
→hen an error occurs, the operation lamp (Green) and the timer lamp (Orange) indicate the error
TROUBLESHOOTING
content by blinking. To check the error memory, follow the procedures below.
1. Stop the operation of the air conditioner, and then disconnect the power supply.
2. Reconnect the power supply.
3. In one of the following two methods, the memorized error is only displayed during the “3 minutes ST”* state period.
• Start the operation and then press the TEST RUN button on the remote controller.
• Press the MANUAL AUTO button on the indoor unit for 10 seconds or more.
*: The “3 minutes ST” period lasts 2 minutes and 20 seconds after turning on the power supply.
1-2. How to erase the error memory
The error memory can be erased in one of the following two methods.
• Manual erase: Pressing the MANUAL AUTO button on the indoor unit while the “Error memory display” is being shown. (Short beep emits for about 3 seconds.)
• Automatic erase: After continuing the normal operation of the air conditioner without error for 2
hours or longer after displaying the error memory as described in How to check the error memory.
(Except FAN operation mode.)
1-1. How to check the error memory - (03-1) - 1. Error code
1-3. Error code table (Wired remote controller)
The operation, timer, and economy indicators operate according to the error contents.
For confirmation of the error contents, refer the flashing pattern as follows.
Wired remote
Error contents
E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) 11
E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) 11
E: 12. →ired remote controller communication error (Indoor unit) 12
E: 18. External communication error (Indoor unit) 18
E: 23. Combination error (Outdoor unit) 23
E: 26. Address setting error in wired remote controller (Indoor unit) 26
E: 29. Connected unit number error (Indoor unit) 29
TROUBLESHOOTING
E: 32. Indoor unit main PCB error (Indoor unit) 32
E: 33. Indoor unit motor electricity consumption detection error (Indoor unit) 33
E: 39. Indoor unit power supply error for fan motor (Indoor unit) 39
E: 3A. Indoor unit communication circuit (wired remote controller) error 3A
E: 41. Room temperature sensor error (Indoor unit) 41
E: 42. Indoor unit heat exchanger sensor error (Indoor unit) 42
E: 51. Indoor unit fan motor error (Indoor unit) 51
E: 53. Drain pump error (Indoor unit) 53
E: 62. Outdoor unit main PCB error (Outdoor unit) 62
E: 63. Inverter error (Outdoor unit) 63
E: 64. PFC circuit error (Outdoor unit) 64
E: 65. IPM error (Outdoor unit) 65
E: 71. Discharge thermistor error (Outdoor unit) 71
E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit) 73
E: 74. Outdoor temperature thermistor error (Outdoor unit) 74
E: 84. Current sensor error (Outdoor unit) 84
E: 94. Trip detection (Outdoor unit) 94
E: 95. Compressor motor control error (Outdoor unit) 95
E: 97. Outdoor unit fan motor error (Outdoor unit) 97
E: 99. 4-way valve error (Outdoor unit) 99
E: A1. Discharge temperature error (Outdoor unit) A1
controller
display
TROUBLESHOOTING
1-3. Error code table (→ired remote controller) - (03-2) - 1. Error code
2. Troubleshooting with error code
+
-
2-1. E: 11. Serial communication error (Serial reverse transfer
error) (Outdoor unit)
Indicator
Detective actuator Outdoor unit
Forecast of cause
TROUBLESHOOTING
→ired remote
controller
Error code E: 11
Main PCB →hen the indoor unit cannot receive the serial signal
from outdoor unit more than 2 minutes after power on,
Fan motor
or the indoor unit cannot receive the serial signal more
than 15 seconds during normal operation.
Connection failure
External cause
Main PCB failure
Outdoor unit fan motor failure
TROUBLESHOOTING
Check point 1. Reset the power and operate
Does error indication show again?
If no, go to "Check point 1-2".
Check point 2. Check connection
Check any loose or removed connection line of indoor unit and outdoor unit.
Check connection condition is control unit. (If there is loose connector, open cable or mis-wiring.)
If there is an abnormal condition, correct it by referring to the installation manual or the “DESIGN
& TECHNICAL MANUAL”.
Check point 3. Check the voltage of power supply
Check the voltage of power supply
Check if AC 198 V (AC 220 V -10%) to AC 264 V (AC 240 V +10%) appears at
outdoor unit terminal L - N.
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) - (03-3) - 2. Troubleshooting with error code
Check point 4. Check serial signal (Reverse transfer signal)
RED
BLACK
WHITE
BLACK
WHITE
+
-
N
L
3
2
1
Check serial signal (Reverse transfer signal)
• Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1
—3.
• If it is abnormal, check the parts below.
– Outdoor unit fan motor in "Service parts information" on page 03-43
• If outdoor fan motor is abnormal, replace outdoor unit fan motor and main PCB.
TROUBLESHOOTING
• If the checked parts are normal, replace the main PCB.
TROUBLESHOOTING
End
Check point 1-2. Check external cause such as noise
• Check the complete insulation of the grounding.
• Check if there is any equipment that causes harmonic wave near the power cable (Neon light
bulb or any electronic equipment which causes harmonic wave).
End
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) - (03-4) - 2. Troubleshooting with error code
2-2. E: 11. Serial communication error (Serial forward transfer
+
-
error) (Indoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Indoor unit
Outdoor unit Main PCB
Error code E: 11
Main PCB
Fan motor
→hen the outdoor unit cannot properly receive the serial
signal from indoor unit for 10 seconds or more.
Connection failure
External cause
Main PCB failure
Check point 1. Reset the power and operate
Does error indication show again?
TROUBLESHOOTING
If no, go to "Check point 1-2".
TROUBLESHOOTING
Check point 2. Check connection
Check any loose or removed connection line of indoor unit and outdoor unit.
If there is an abnormal condition, correct it by referring to the installation manual or the “DESIGN
& TECHNICAL MANUAL”.
Check connection condition is control unit. (If there is loose connector, open cable or mis-wiring.)
Check point 3. Check the voltage of power supply
Check the voltage of power supply
Check if AC 198 V (AC 220 V -10%) to AC 264 V (AC 240 V +10%) appears at
outdoor unit terminal L - N.
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) - (03-5) - 2. Troubleshooting with error code
Check point 4. Check serial signal (Forward transfer signal)
RED
BLACK
WHITE
BLACK
WHITE
+
-
N
L
3
2
1
Check serial signal (Forward transfer signal)
• Check if indicated value swings between AC 30 V and AC 130 V at outdoor unit terminal 2—3.
• If it is abnormal, replace main PCB.
TROUBLESHOOTING
End
TROUBLESHOOTING
Check point 1-2. Check external cause such as noise
• Check if the ground connection is proper.
• Check if there is any equipment that causes harmonic wave near the power cable (Neon light
bulb or any electronic equipment which causes harmonic wave).
End
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) - (03-6) - 2. Troubleshooting with error code
2-3. E: 12. Wired remote controller communication error (Indoor
unit)
Indicator
Detective actuator
Forecast of cause
TROUBLESHOOTING
Check point 1. Check the connection of terminal
→ired remote
controller
Indoor unit Main PCB →hen the indoor unit cannot receive the signal from
→ired remote control
Error code E: 12
wired remote controller more than following time during
normal operation.
• 3-wire type: 1 minute
• 2-wire type: 2.5 minutes
Terminal connection abnormal
→ired remote control failure
Main PCB failure
TROUBLESHOOTING
After turning off the power, check & correct the followings.
• Check the connection of terminal between wired remote controller and indoor unit, and check if
there is a disconnection of the cable.
Check Point 1-2 : Check →ired remote controller
and main PCB
Check voltage at CN300 (terminal 1-3,
terminal 1-2) of main PCB. (Power
supply to the remote controller)
Upon correcting the removed connector or mis-wiring, reset the power.
• If it is DC 13 V, remote controller is failure.
(Main PCB is normal)
– Replace remote control
• If it is DC 0 V, main PCB is failure. (Check
remote controller once again)
– Replace main PCB
End
Check Point 2 : →ire installation wrong remote controller group setting
• →rong wire connection in remote controller group (Please refer to the installation manual)
• The number of connecting indoor unit and remote controller in one remote controller group
were less than 32 units.
Check Point 2-1 : Check Indoor unit main PCB
• Check if main PCB damage
• Change main PCB and check the error after setting remote controller address
End
2-3. E: 12. →ired remote controller communication error (Indoor unit) - (03-7) - 2. Troubleshooting with error code
2-4. E: 18. External communication error (Indoor unit)
Indicator
Detective actuator Indoor unit
Forecast of cause
→ired remote
controller
Error code E: 18
External
communication
error
After receiving a signal from the external input and
output PCB, the same signal has not been received for
15 seconds.
Connection failure
External input and output PCB failure
Main PCB
Check point 1. Check the connection
• Check any loose or removed connection between the main PCB to the external input and output PCB.
TROUBLESHOOTING
-> If there is an abnormal condition, correct it by refer to the installation manual or the “DESIGN
& TECHNICAL MANUAL”.
TROUBLESHOOTING
• Check the connection condition on the external input and output PCB and the main PCB (If
there is loose connector, open cable or mis-wiring.)
Check point 2. Replace the external input and output PCB
If check point 1 do not improve the symptom, change external input and output PCB.
Check point 3. Replace main PCB
If check point 2 do not improve the symptom, change main PCB
End
2-4. E: 18. External communication error (Indoor unit) - (03-8) - 2. Troubleshooting with error code
2-5. E: 23. Combination error (Outdoor unit)
Indicator
Detective actuator Indoor unit
Forecast of cause Incorrect indoor unit is selected.
→ired remote
controller
Error code E: 23
• The outdoor unit receives the serial signal of
applied refrigerant information from indoor unit.
(→hen the refrigerant type is R410A)
• →hen the outdoor unit type is multi type
Check point 1. Check the type of indoor unit
• Check the type of the connected indoor unit.
-> If there is an abnormal condition, correct it by refer to the installation manual or the “DESIGN
& TECHNICAL MANAL”.
TROUBLESHOOTING
TROUBLESHOOTING
Check point 2. Replace main PCB
If check point 1 do not improve the symptom, replace main PCB of the outdoor unit.
End
2-5. E: 23. Combination error (Outdoor unit) - (03-9) - 2. Troubleshooting with error code
2-6. E: 26. Address setting error in wired remote controller
(Indoor unit)
Indicator
Detective actuator
Forecast of cause
TROUBLESHOOTING
Check point 1. →ire installation
→ired remote
controller
→ired remote controller (2-wire) • →hen the address number set by auto setting and
Indoor unit controller PCB
Error code E: 26
manual setting are mixed in one remote controller
group
• →hen the duplicated address number exists in one
remote controller group
→rong wiring of remote controller group
→rong remote controller address setting
Indoor unit main PCB failure
Remote controller failure
TROUBLESHOOTING
• Check the wire connection in the remote controller group (For installation method, refer to installation manual)
-> If there is an abnormal condition, correct it by refer to the installation manual or the “DESIGN
& TECHNICAL MANUAL”.
Check point 2. →rong remote controller group setting
• The given address number by auto setting (00) and the manual set number (except 00) are not
existing in one remote controller group.
• The remote controller address setting by UI is not existing same address.
• The duplicate address number is not existing in one remote controller group.
Check point 3. Check indoor unit main PCB
• Check if main PCB is damaged.
• Change main PCB and check the error after setting remote controller address.
End
2-6. E: 26. Address setting error in wired remote controller (Indoor unit) - (03-10) - 2. Troubleshooting with error code
2-7. E: 29. Connected unit number error (Indoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
→ired remote controller (2-wire)
Indoor unit main PCB
Error code E: 29
→hen the number of the connected indoor unit exceeds
the limitation.
→rong wiring of indoor unit or remote controller
Number of indoor unit or remote controller in remote
controller group
Indoor unit main PCB failure
Check point 1. →ire installation
• →rong number of connected indoor unit
-> If there is an abnormal condition, correct it by refer to the installation manual or the “DESIGN
TROUBLESHOOTING
& TECHNICAL MANUAL”.
TROUBLESHOOTING
Check point 2. Check indoor unit main PCB
• Check if main PCB is damaged.
• Change main PCB and check the error after setting remote controller address.
End
2-7. E: 29. Connected unit number error (Indoor unit) - (03-11) - 2. Troubleshooting with error code
2-8. E: 32. Indoor unit main PCB error (Indoor unit)
Indicator
Detective actuator Indoor unit main PCB
Forecast of cause
→ired remote
controller
Error code E: 32
→hen power is on and there is some below case.
1. →hen model information of EEPROM is incorrect.
2. →hen the access to EEPROM failed.
External cause
Defective connection of electric components
Main PCB failure
Check point 1. Reset power supply and operate
Does error indication show again?
If no, go to "Check point 1-2".
TROUBLESHOOTING
TROUBLESHOOTING
Check point 2. Check Indoor unit electric components
• Check all connectors. (loose connector or incorrect wiring)
• Check any shortage or corrosion on PCB.
Check point 3. Replace main PCB
Change main PCB.
End
Check point 1-2. Check external cause such as noise
• Check if the ground connection is proper.
• Check if there is any equipment that causes harmonic wave near the power cable (Neon light
bulb or any electronic equipment which causes harmonic wave).
End
NOTE: EEPROM
EEPROM (Electronically Erasable and Programmable Read Only Memory) is a non-volatile
memory which keeps memorized information even if the power is turned off. It can change
the contents electronically. To change the contents, it uses higher voltage than normal, and
it cannot change a partial contents. (Rewriting shall be done upon erasing the all contents.)
There is a limit in a number of rewriting.
2-8. E: 32. Indoor unit main PCB error (Indoor unit) - (03-12) - 2. Troubleshooting with error code
2-9. E: 33. Indoor unit motor electricity consumption detection
error (Indoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Indoor unit motor electricity
consumption detection
Error code E: 33
→hen the voltage value or the current value of the motor
go beyond the limits
Fan motor failure
Main PCB failure
Check point 1. Check the rotation of fan
Rotate the fan by hand when the operation is off. (Check if fan is caught, drop off or locked motor)
If fan or bearing is abnormal, replace it.
TROUBLESHOOTING
TROUBLESHOOTING
Check point 2. Check ambient temperature around the motor
Check excessively high temperature around the motor. (If there is any surrounding equipment that
causes heat.)
Upon the temperature coming down, restart operation.
Check point 3. Check indoor unit fan motor
Check indoor unit fan motor. (Refer to indoor unit fan motor in "Service parts information" on page
03-43.)
If indoor unit fan motor is abnormal, replace it.
Check point 4. Replace main PCB
If check point 1-3 does not improve the symptom, change main PCB.
End
2-9. E: 33. Indoor unit motor electricity consumption detection error (Indoor unit) - (03-13) - 2. Troubleshooting with error code
2-10. E: 39. Indoor unit power supply error for fan motor (Indoor
unit)
Indicator
Detective actuator Indoor unit main PCB
Forecast of cause
→ired remote
controller
Error code E: 39
• →hen a momentary power cut off
• →hen do not start fan motor
External cause
Connector connection failure
Main PCB failure
Check point 1. Check external cause at indoor and outdoor (Voltage drop or Noise)
• Instant drop: Check if there is a large load electric apparatus in the same circuit.
TROUBLESHOOTING
• Momentary power failure: Check if there is a defective contact or leak current in the power supply circuit.
TROUBLESHOOTING
• Noise: Check if there is any equipment causing harmonic wave near electric line. (Neon bulb or
electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
Check point 2. Check connection of Connector
• Check if connector is removed.
• Check erroneous connection.
• Check if cable is open.
Upon correcting the removed connector or mis-wiring, reset the power.
Check point 3. Replace main PCB
If check point 1 to 2 do not improve the symptom, change main PCB.
End
2-10. E: 39. Indoor unit power supply error for fan motor (Indoor unit) - (03-14) - 2. Troubleshooting with error code
2-11. E: 3A. Indoor unit communication circuit (wired remote
controller) error
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
→ired remote controller (2-wire)
Indoor unit controller PCB circuit
Error code E: 3A
Detect the communication error of microcomputer and
communication PCB.
Communication PCB defective
Indoor unit main PCB defective
Check point 1. Check the connection of terminal
• After turning off the power supply, check and correct the followings
Indoor unit - Check the connection the communication PCB and the main PCB
TROUBLESHOOTING
TROUBLESHOOTING
Check Point 2 : Replace the communication PCB
If the Check point 1 is ok, replace the communication PCB
Check Point 3 : Replace the main PCB
If condition is doesn’t change, replace the main PCB
End
2-11. E: 3A. Indoor unit communication circuit (wired remote controller) error - (03-15) - 2. Troubleshooting with error code
2-12. E: 41. Room temperature sensor error (Indoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Indoor unit main PCB
Room temperature thermistor
Error code E: 41
Room temperature thermistor is open or short is
detected always.
Connector failure
Thermistor failure
Main PCB failure
Check point 1. Check connection of connector
• Check if connector is loose or removed.
• Check erroneous connection.
• Check if thermistor cable is open
TROUBLESHOOTING
TROUBLESHOOTING
-> Reset power when reinstalling due to removed connector or incorrect wiring.
Check point 2. Remove connector and check thermistor resistance value
• For the room thermistor resistance value, refer to "Thermistor resistance values"
on page 03-54.
• If thermistor is either open or shorted, replace it and reset the power.
Check point 3. Check voltage of main PCB
Make sure circuit diagram of each indoor unit and check terminal voltage at thermistor (DC 5.0 V).
NOTE: For details of thermistor connector, refer to "→iring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-24.
If the voltage does not appear, replace main PCB.
End
2-12. E: 41. Room temperature sensor error (Indoor unit) - (03-16) - 2. Troubleshooting with error code
2-13. E: 42. Indoor unit heat exchanger sensor error (Indoor
unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Indoor unit main PCB
Heat exchanger temperature
thermistor
Error code E: 42
→hen heat exchanger temperature thermistor open or
short circuit is detected.
Connector connection failure
Thermistor failure
Main PCB failure
Check point 1. Check connection of connector
• Check if connector is loose or removed.
TROUBLESHOOTING
• Check erroneous connection.
TROUBLESHOOTING
• Check if thermistor cable is open
-> Reset power when reinstalling due to removed connector or incorrect wiring.
Check point 2. Remove connector and check thermistor resistance value
• For the heat exchanger thermistor resistance value, refer to "Thermistor resis-
tance values" on page 03-54.
• If thermistor is either open or shorted, replace it and reset the power.
Check point 3. Check voltage of main PCB
Make sure circuit diagram of each indoor unit and check terminal voltage at thermistor (DC 5.0 V).
NOTE: For details of thermistor connector, refer to "→iring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-24.
If the voltage does not appear, replace main PCB.
End
2-13. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) - (03-17) - 2. Troubleshooting with error code
2-14. E: 51. Indoor unit fan motor error (Indoor unit)
Indicator
Detective actuator Indoor unit
Forecast of cause
→ired remote
controller
Error code E: 51
main PCB →hen the condition that actual frequency of indoor fan is
Fan motor
below 1/3 of target frequency is continued more than 56
seconds.
Fan rotation failure
Fan motor winding open
Motor protection by surrounding temperature rise
Control PCB failure
Indoor unit fan motor failure
Check point 1. Check rotation of fan
TROUBLESHOOTING
Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)
If fan or bearing is abnormal, replace it.
TROUBLESHOOTING
Check point 2. Check ambient temperature around motor
Check excessively high temperature around the motor. (If there is any surrounding equipment that
causes heat)
Upon the temperature coming down, restart operation.
Check point 3. Check indoor unit fan motor
Check Indoor unit fan motor. (Refer to indoor unit fan motor in "Service parts information" on page
03-43.)
If Indoor unit fan motor is abnormal, replace Indoor unit fan motor.
Check point 4. Replace main PCB
If Check Point 1 to 3 do not improve the symptom, replace main PCB.
End
2-14. E: 51. Indoor unit fan motor error (Indoor unit) - (03-18) - 2. Troubleshooting with error code
2-15. E: 53. Drain pump error (Indoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Indoor unit main PCB
Float switch
Error code E: 53
→hen Float switch is ON for more than 3 minutes.
Float switch failure
Shorted connector/wire failure
Main PCB failure
Drain pump failure
Hose clogging
Check point 1. Check float switch
• Check operation of float switch. (any blocking by dust, etc.)
TROUBLESHOOTING
• Remove float switch and check ON/OFF switching operation by using a meter.
TROUBLESHOOTING
-> If float switch is abnormal, replace it.
Check point 2. Check connector and wire
Check loose contact of CN9 and shorted wire (pinched wire).
-> Replace float switch if the wire is abnormal
Check point 3. Check drain hose
Check drain hose.
-> If there is hose clogging. Please clear the clog.
Check point 4. Replace drain pump
If check point 1 to 3 do not improve the symptom, replace drain pump.
Check point 5. Replace main PCB
If check point 4 do not improve the symptom, replace main PCB.
End
2-15. E: 53. Drain pump error (Indoor unit) - (03-19) - 2. Troubleshooting with error code
2-16. E: 62. Outdoor unit main PCB error (Outdoor unit)
Indicator
Detective actuator Outdoor unit Main PCB
Forecast of cause
→ired remote
controller
Error code E: 62
Access to EEPROM failed due to some cause after
outdoor unit started.
External cause (Noise, temporary open, voltage drop)
Main PCB failure
Check point 1. Reset power supply and operate
If no, go to "Check point 1-2".
Does error indication show again?
TROUBLESHOOTING
Check point 2. Replace main PCB
TROUBLESHOOTING
Change main PCB.
End
Check point 1-2. Check external cause
• Check if temporary voltage drop was not
generated.
• Check if momentary open was not generated.
• Check if ground is connection correctly or
there are no related cables near the power
line.
End
2-16. E: 62. Outdoor unit main PCB error (Outdoor unit) - (03-20) - 2. Troubleshooting with error code
2-17. E: 63. Inverter error (Outdoor unit)
Indicator
Detective actuator Outdoor unit Inverter PCB Error information received from inverter PCB
Forecast of cause
→ired remote
controller
Error code E: 63
External cause
Power supply to inverter PCB wiring disconnection or
open
Inverter PCB failure
Check point 1. Turn the power on again?
If no, go to "Check point 1-2".
Error displayed again?
TROUBLESHOOTING
Check point 2. Check the wiring (power supply to inverter PCB)
TROUBLESHOOTING
• Connector and wiring connection state check
• Cable open check
Check point 3. Replace inverter PCB
Replace inverter PCB
End
Check point 1-2. Check external cause
• Check if temporary voltage drop was not generated.
• Check if momentary open was not generated.
• Check if ground is connection correctly or there are no related cables near the power line.
End
2-17. E: 63. Inverter error (Outdoor unit) - (03-21) - 2. Troubleshooting with error code
2-18. E: 64. PFC circuit error (Outdoor unit)
Indicator
Detective actuator Outdoor unit Main PCB
Forecast of cause
→ired remote
controller
Error code E: 64
• →hen inverter input DC voltage is higher than 415
V for over 3 seconds, the compressor stops.
• If the same operation is repeated 5 times, the
compressor stops permanently.
External cause
Connector connection failure
Main PCB failure
Check point 1. Check external cause at indoor and outdoor (Voltage drop or Noise)
• Instant drop: Check if there is a large load electric apparatus in the same circuit.
TROUBLESHOOTING
• Momentary power failure: Check if there is a defective contact or leak current in the power sup-
TROUBLESHOOTING
ply circuit.
• Noise: Check if there is any equipment causing harmonic wave near electric line. (Neon bulb or
electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
Check point 2. Check connection of Connector
• Check if connector is removed.
• Check erroneous connection.
• Check if cable is open.
Upon correcting the removed connector or mis-wiring, reset the power.
Check point 3. Replace main PCB
If check point 1 to 2 do not improve the symptom, change main PCB.
End
2-18. E: 64. PFC circuit error (Outdoor unit) - (03-22) - 2. Troubleshooting with error code
2-19. E: 65. IPM error (Outdoor unit)
Indicator
Detective actuator Outdoor unit
Forecast of cause
TROUBLESHOOTING
→ired remote
controller
Error code E: 65
Main PCB 1. →hen more than normal operating current to IPM in
main PCB flows, the compressor stops.
2. After the compressor restarts, if the same operation
Compressor
is repeated within 40 seconds, the compressor
stops again.
3. If 1. and 2. repeats 5 times, the compressor stops
permanently.
Defective connection of electric components
Outdoor fan operation failure
Outdoor heat exchanger clogged
Compressor failure
Main PCB failure
TROUBLESHOOTING
Check point 1. Check connections of outdoor unit electrical components
• Check if the terminal connection is loose.
• Check if connector is removed.
• Check erroneous connection.
• Check if cable is open.
Upon correcting the removed connector or mis-wiring, reset the power.
Check point 2. Check outdoor fan and heat exchanger
• Is there anything obstructing the air distribution circuit?
• Is there any clogging of outdoor heat exchanger?
• Is the fan rotating by hand when operation is off?
If the fan motor is locked, replace it.
Check point 3. Check outdoor fan
Check outdoor fan motor. (Refer to "E: 97. Outdoor unit fan motor error (Outdoor unit)" on page 03-
31.)
If the fan motor is failure, replace it.
2-19. E: 65. IPM error (Outdoor unit) - (03-23) - 2. Troubleshooting with error code
Check point 4. Check compressor
Check compressor. (Refer to inverter compressor in "Service parts information".)
Check point 5. Replace main PCB
If Check point 1 to 4 do not improve the symptom, change main PCB.
End
TROUBLESHOOTING
TROUBLESHOOTING
2-19. E: 65. IPM error (Outdoor unit) - (03-24) - 2. Troubleshooting with error code
2-20. E: 71. Discharge thermistor error (Outdoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Outdoor unit main PCB
Discharge pipe temperature
thermistor
Error code E: 71
→hen discharge pipe temperature thermistor open or
short circuit is detected at power on or while running the
compressor
Connector failure
Thermistor failure
Main PCB failure
Check point 1. Check connection of connector
• Check if connector is loose or removed.
• Check erroneous connection.
TROUBLESHOOTING
• Check if thermistor cable is open
TROUBLESHOOTING
Reset power when reinstalling due to removed connector or incorrect wiring.
Check point 2. Remove connector and check thermistor resistance value
• For the discharge temperature thermistor resistance value, refer to "Thermistor
resistance values" on page 03-54.
• If thermistor is either open or shorted, replace it and reset the power.
Check point 3. Check voltage of main PCB
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor
(DC 5.0 V).
NOTE: For details of thermistor connector, refer to "→iring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-24.
If the voltage does not appear, replace main PCB.
End
2-20. E: 71. Discharge thermistor error (Outdoor unit) - (03-25) - 2. Troubleshooting with error code
2-21. E: 73. Outdoor unit heat exchanger thermistor error
(Outdoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Outdoor unit main PCB
Heat exchanger temperature
thermistor
Error code E: 73
→hen heat exchanger temperature thermistor open or
short circuit is detected at power on or while running the
compressor
Connector failure
Thermistor failure
Main PCB failure
Check point 1. Check connection of connector
• Check if connector is loose or removed.
TROUBLESHOOTING
• Check erroneous connection.
TROUBLESHOOTING
• Check if thermistor cable is open
Reset power when reinstalling due to removed connector or incorrect wiring.
Check point 2. Remove connector and check thermistor resistance value
• For the outdoor unit heat exchanger thermistor resistance value, refer to "Ther-
mistor resistance values" on page 03-54.
• If thermistor is either open or shorted, replace it and reset the power.
Check point 3. Check voltage of main PCB
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor
(DC 5.0 V).
NOTE: For details of thermistor connector, refer to "→iring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-24.
If the voltage does not appear, replace main PCB.
End
2-21. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit) - (03-26) - 2. Troubleshooting with error code
2-22. E: 74. Outdoor temperature thermistor error (Outdoor unit)
Indicator
Detective actuator
Forecast of cause
→ired remote
controller
Outdoor unit main PCB →hen outdoor temperature thermistor open or short
Outdoor temperature thermistor
Error code E: 74
circuit is detected at power on or while running the
compressor
Connector failure
Thermistor failure
Main PCB failure
Check point 1. Check connection of connector
• Check if connector is loose or removed.
• Check erroneous connection.
TROUBLESHOOTING
• Check if thermistor cable is open
TROUBLESHOOTING
-> Reset power when reinstalling due to removed connector or incorrect wiring.
Check point 2. Remove connector and check thermistor resistance value
• For the outdoor temperature thermistor resistance value, refer to "Thermistor re-
sistance values" on page 03-54.
• If thermistor is either open or shorted, replace it and reset the power.
Check point 3. Check voltage of main PCB
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor
(DC 5.0 V).
NOTE: For details of thermistor connector, refer to "→iring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-24.
If the voltage does not appear, replace main PCB.
End
2-22. E: 74. Outdoor temperature thermistor error (Outdoor unit) - (03-27) - 2. Troubleshooting with error code
2-23. E: 84. Current sensor error (Outdoor unit)
Indicator
Detective actuator Outdoor unit main PCB
Forecast of cause
→ired remote
controller
Error code E: 84
→hen input current sensor has detected 0 A, while
inverter compressor is operating at higher than 56 rps,
after 1 minute upon starting the compressor. (Except
during the defrost operation)
Defective connection of electric components
External cause
Main PCB failure
Check point 1. Reset power supply and operate
If no, go to "Check point 1-2".
Does error indication show again?
TROUBLESHOOTING
TROUBLESHOOTING
Check point 2. Check connections of outdoor
unit electrical components
• Check if the terminal connection is loose.
• Check if connector is removed.
Upon correcting the removed connector or miswiring, reset the power.
• Check erroneous connection.
• Check if cable is open.
Check point 3. Replace main PCB
If Check point 1, 2 do not improve the symptom,
change main PCB.
End
Check point 1-2. Check external cause at Indoor and Outdoor (Voltage drop or Noise)
• Instant drop: Check if there is a large load electric apparatus in the same circuit.
• Momentary power failure: Check if there is a defective contact or leak current in the power supply circuit.
• Noise: Check if there is any equipment causing harmonic wave near electric line. (Neon bulb or
electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
End
2-23. E: 84. Current sensor error (Outdoor unit) - (03-28) - 2. Troubleshooting with error code
2-24. E: 94. Trip detection (Outdoor unit)
Indicator
Detective actuator Outdoor unit
Forecast of cause
→ired remote
controller
Error code E: 94
Main PCB Protection stop by over-current generation after inverter
compressor start processing completed generated
Compressor
consecutively 10 times.
NOTE: The number of generations is reset when the
compressor starts up.
Outdoor unit fan operation defective, foreign matter on
heat-exchanger, excessive rise of ambient temperature
Main PCB failure
Inverter compressor failure (lock, winding short)
Check point 1. Check the outdoor unit fan operation, heat-exchanger, ambient temperature
TROUBLESHOOTING
• No obstructions in air passages?
TROUBLESHOOTING
• Heat exchange fins clogged
• Outdoor unit fan motor check
• Ambient temperature not raised by the effect of other heat sources?
• Discharged air not sucked in?
Check point 2. Replace main PCB
If Check point 1 do not improve the symptom, change main PCB.
Check point 3. Replace compressor
If Check point 2 do not improve the symptom, change compressor.
End
2-24. E: 94. Trip detection (Outdoor unit) - (03-29) - 2. Troubleshooting with error code
2-25. E: 95. Compressor motor control error (Outdoor unit)
Indicator
Detective actuator Outdoor unit
Forecast of cause
TROUBLESHOOTING
Check point 1. Check Noise from Compressor
→ired remote
controller
Error code E: 95
Main PCB 1. →hen running the compressor, if the detected rotor
location is out of phase with actual rotor location
more than 90°, the compressor stops.
2. After the compressor restarts, if the same operation
Compressor
is repeated within 40 seconds, the compressor
stops again.
3. If 1. and 2. repeats 5 times, the compressor stops
permanently.
Defective connection of electric components
Main PCB failure
Compressor failure
TROUBLESHOOTING
Turn on Power and check operation noise.
If an abnormal noise show, replace compressor.
Check point 2. Check connection of around the compressor components
For compressor terminal, main PCB
• Check if connector is removed.
• Check erroneous connection.
• Check if cable is open. (Refer to inverter compressor in "Service parts information" on page 03-
43.)
Upon correcting the removed connector or mis-wiring, reset the power.
Check point 3. Replace main PCB
If Check point 1, 2 do not improve the symptom, change main PCB.
Check point 4. Replace compressor
If Check point 3 do not improve the symptom, change compressor.
End
2-25. E: 95. Compressor motor control error (Outdoor unit) - (03-30) - 2. Troubleshooting with error code
2-26. E: 97. Outdoor unit fan motor error (Outdoor unit)
Indicator
Detective actuator Outdoor unit
Forecast of cause
TROUBLESHOOTING
→ired remote
controller
Error code E: 97
Main PCB 1. →hen outdoor fan rotation speed is less than 100
rpm in 20 seconds after fan motor starts, fan motor
stops.
2. After fan motor restarts, if the same operation within
Fan motor
60 seconds is repeated 3 times in a row,
compressor and fan motor stops.
3. If 1. and 2. repeats 5 times in a row, compressor
and fan motor stops permanently.
Fan rotation failure
Motor protection by surrounding temperature rise
Main PCB failure
Outdoor unit fan motor
TROUBLESHOOTING
Check point 1. Check rotation of fan
Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)
If fan or bearing is abnormal, replace it.
Check point 2. Check ambient temperature around motor
Check excessively high temperature around the motor. (If there is any surrounding equipment that
causes heat)
Upon the temperature coming down, restart operation.
Check point 3. Check outdoor unit fan motor
Check outdoor unit fan motor. (Refer to outdoor unit fan motor in "Service parts information" on
page 03-43.)
If outdoor unit fan motor is abnormal, replace outdoor unit fan motor and main PCB.
Check point 4. Check output voltage of main PCB
Check outdoor unit circuit diagram and the voltage. (Measure at main PCB side connector)
NOTE: For details of wiring diagram, refer to
"→iring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-24.
Read wire DC voltage
Red—Black
280 V ±10 % (for 09 model), 140 V — 280 V ±10 % (for 12/18
models)
→hite—Black 15 ±1.5 V
-> If the voltage is not correct, replace Main PCB.
End
2-26. E: 97. Outdoor unit fan motor error (Outdoor unit) - (03-31) - 2. Troubleshooting with error code
2-27. E: 99. 4-way valve error (Outdoor unit)
Indicator
Detective actuator
TROUBLESHOOTING
Forecast of cause
→ired remote
controller
Indoor unit main PCB →hen the indoor heat exchanger temperature is
Heat exchanger temperature
thermistor
Room temperature thermistor
4-way valve
Error code E: 99
compared with the room temperature, and either
following condition is detected continuously two times,
the compressor stops.
Indoor heat exchanger temp. - Room temp. > 20 °F
(10 °C) (Cooling or Dry operation)
Indoor heat exchanger temp. - Room temp. < -20 °F
(-10 °C) (Heating operation)
If the same operation is repeated 5 times, the
compressor stops permanently.
Connector connection failure
Thermistor failure
Coil failure
4-way valve failure
Main PCB failure
TROUBLESHOOTING
Check point 1. Check connection of connector
• Check if connector is removed.
• Check erroneous connection.
• Check if thermistor cable is open.
Upon correcting the removed connector or mis-wiring, reset the power.
Check point 2. Check each thermistor
• Isn’t it fallen off the holder?
• Is there a cable pinched?
Check characteristics of room thermistor and indoor unit heat exchanger thermistor.
For the thermistor resistance value, refer to "Thermistor resistance values" on page 03-54.
If defective, replace the thermistor.
2-27. E: 99. 4-way valve error (Outdoor unit) - (03-32) - 2. Troubleshooting with error code
Check point 3. Check the solenoid coil and 4-way valve
• Solenoid coil
Remove P60 from PCB and check the resistance value of coil. Resistance value is about 2.085
kΩ (for 09 model) or 1.97 kΩ (for 12/18 models) (at 68 °F (20 °C)).
If it is open or abnormal resistance value, replace solenoid coil.
• 4-way valve
Check each piping temperature, and the location of the valve by the temperature difference.
If the value location is not proper, replace 4-way valve.
Check point 4. Check the voltage of 4-way valve
Check the voltage P60 of Main PCB.
Check if AC 198 V (AC 220 V -10%) to AC 264 V (AC 240 V +10%) appears at P60 of Main PCB.
TROUBLESHOOTING
• Heating operation
TROUBLESHOOTING
If it is not voltage, Replace Main PCB.
• Cooling operation
If it is voltage, Replace Main PCB.
Check point 5. Replace main PCB
If Check Point 1 to 4 do not improve the symptom, replace main PCB.
End
2-27. E: 99. 4-way valve error (Outdoor unit) - (03-33) - 2. Troubleshooting with error code
2-28. E: A1. Discharge temperature error (Outdoor unit)
Indicator
Detective actuator
Forecast of cause
TROUBLESHOOTING
Check point 1. Check if 3-way valve is open
→ired remote
controller
Outdoor unit main PCB Protection stop by discharge temperature ≥ 230 °F
Discharge temperature thermistor
Error code E: A1
(110 °C) during compressor operation generated 2 times
within 24 hours.
3-way valve not opened
EEV defective, strainer clogged
Outdoor unit operation failure, foreign matter on heat
exchanger
Discharge temperature thermistor failure
Insufficient refrigerant
Main PCB failure
TROUBLESHOOTING
If the 3-way valve is closed, open the 3-way valve and check operation.
NOTE: For cooling operation, check gas side of the 3-way valve.
For heating operation, check liquid side of the 3-way valve.
Check point 2. Check the electronic expansion valve (EEV) and strainer
• Check if EEV open.
Refer to outdoor unit Electronic Expansion Valve (EEV) in "Service parts information" on page
03-43.
• Check the strainer clogging.
Check point 3. Check the outdoor unit fan and heat exchanger
• Check for foreign object at heat exchanger
• Check if fan can be rotated by hand.
• Check the motor. (Refer to outdoor unit fan motor in "Service parts information" on page 03-
43.)
Check point 4. Check the discharge thermistor
The discharge temperature thermistor characteristics check. (Check by disconnecting thermistor
from PCB.)
NOTE: For the characteristics of the thermistor, refer to "Thermistor resistance values" on page
03-54.
2-28. E: A1. Discharge temperature error (Outdoor unit) - (03-34) - 2. Troubleshooting with error code
Check point 5. Check the refrigerant amount
Check the refrigerant leakage.
Check point 6. Replace main PCB
If check point 1 to 5 do not improve the symptom, replace the main PCB.
End
TROUBLESHOOTING
TROUBLESHOOTING
2-28. E: A1. Discharge temperature error (Outdoor unit) - (03-35) - 2. Troubleshooting with error code
3. Troubleshooting without error code
+
-
3-1. Indoor unit—No power
Power supply failure
Forecast of cause
Electrical components defective
Check point 1. Check installation condition
• Isn’t the breaker down?
• Check loose or removed connection cable.
-> If abnormal condition is found, correct it by referring to the installation manual or the “DESIGN &
TROUBLESHOOTING
TECHNICAL MANUAL”.
Check point 2. Check external cause at indoor and outdoor (voltage drop or noise)
• Instant drop: Check if there is a large load electric apparatus in the same circuit.
• Momentary power failure: Check if there is a defective contact or leak current in the power supply circuit.
• Noise: Check if there is any equipment causing harmonic wave near electric line. (Neon bulb or
electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
External cause
TROUBLESHOOTING
Check point 3. Check electrical components
Check the voltage of power supply.
Check if AC 198 to 264 V appears at outdoor unit terminal L—N.
-> If no, go to "Check point 1" and "Check point 2".
• Check fuse in filter PCB.
If fuse is open, check if the wiring between terminal and filter PCB is loose, and replace fuse.
• Check varistor in filter PCB.
If varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power supply and replace varistor.
Upon checking the normal power supply, replace varistor.
End
3-1. Indoor unit—No power - (03-36) - 3. Troubleshooting without error code
3-2. Outdoor unit—No power
+
-
Power supply failure
Forecast of cause
Electrical components defective
Check point 1. Check installation condition
• Is the circuit breaker on or off?
• Check loose or removed connection cable.
If abnormal condition is found, correct it by referring to the installation manual or the “DESIGN &
TECHNICAL MANUAL”.
External cause
TROUBLESHOOTING
Check point 2. Check external cause at indoor and outdoor (voltage drop or noise)
TROUBLESHOOTING
• Instant drop: Check if there is a large load electric apparatus in the same circuit.
• Momentary power failure: Check if there is a defective contact or leak current in the power supply circuit.
• Noise: Check if there is any equipment causing harmonic wave near electric line. (Neon bulb or
electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
Check point 3. Check electrical components
Check the voltage of power supply.
Check if AC 198 to 264 V appears at outdoor unit terminal L - N
If no, go to "Check point 1" and "Check point 2".
• Check fuse in main PCB.
If fuse is open, check if the wiring between terminal and main PCB is loose, and replace fuse.
Check point 4. Replace main PCB
If check point 1 to 3 do not improve the symptom, change main PCB.
End
3-2. Outdoor unit—No power - (03-37) - 3. Troubleshooting without error code
3-3. No operation (Power is on)
Setting/ Connection failure
Forecast of cause
Electrical components defective
Check point 1. Check indoor and outdoor installation condition
• Indoor unit:
– Check incorrect wiring between indoor unit and remote controller.
– Check if there is an open cable connection.
• Are these indoor unit, outdoor unit, and remote controller suitable model numbers to connect?
-> If there is some abnormal condition, correct it by referring to the installation manual and “DESIGN
& TECHNICAL MANUAL”.
TROUBLESHOOTING
Turn off the power and check correct followings.
• Is there loose or removed communication line of indoor unit and outdoor unit?
External cause
TROUBLESHOOTING
Check point 2. Check external cause at indoor and outdoor (Voltage drop or Noise)
• Instant drop: Check if there is a large load electric apparatus in the same circuit.
• Momentary power failure: Check if there is a defective contact or leak current in the power supply circuit.
• Noise: Check if there is any equipment causing harmonic wave near electric line. (Neon bulb or
electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
Check point 3. Check wired remote controller and controller PCB
Check voltage at CN300 of main PCB. (terminal 1-3, terminal 1-2).
(Power supply to remote controller)
• If it is DC 13 V, remote controller is failure. (The controller PCB is normal)
-> Replace remote controller.
• If it is DC 0 V, controller PCB is failure. (Check the remote controller once
again)
-> Replace controller PCB.
Check point 4. Replace main PCB
If check point 1 to 3 do not improve the symptom, change main PCB.
End
3-3. No operation (Power is on) - (03-38) - 3. Troubleshooting without error code
3-4. No cooling/No heating
MPa MPa
Forecast of cause
Check point 1. Check Indoor unit
• Does Indoor unit fan run in the HIGH mode?
• Is air filter dirty?
• Is heat exchanger clogged?
• Check if energy save function is operated.
Indoor unit error
Outdoor unit error
Effect by surrounding environment
Connection pipe/Connection wire failure
Refrigeration cycle failure
TROUBLESHOOTING
TROUBLESHOOTING
Check point 2. Check outdoor unit operation
• Check if outdoor unit is operating.
• Check any objects that obstruct the air flow route.
• Check if heat exchanger is clogged.
• Is the valve open?
Check point 3. Check site condition
• Is capacity of Indoor unit fitted to the room size?
• Any windows open or direct sunlight?
Check point 4. Check Indoor/ Outdoor installation condition
• Check connection pipe (specified pipe length and pipe diameter?)
• Check any loose or removed communication line.
If there is an abnormal condition, correct it by referring to the installation manual or the “DESIGN
& TECHNICAL MANUAL”.
Check point 5. Check Refrigeration cycle
• Check if strainer is clogged (Refer to the figure below).
• Measure gas pressure, and if there is a leakage, correct it.
• Check the electronic expansion valve.
Refer to outdoor unit Electronic Expansion Valve (EEV) in "Service parts in-
formation" on page 03-43.
• Check compressor.
Refer to compressor in "Service parts information" on page 03-43.
Refer to inverter compressor in "Service parts information" on page 03-43.
NOTE: →hen recharging the refrigerant, make sure to perform vacuuming,
and recharge the specified amount.
End
3-4. No cooling/No heating - (03-39) - 3. Troubleshooting without error code
NOTES:
Pipe (In) Pipe (Out)
Pipe (In) Pipe (Out)
• Strainer normally does not have temperature difference between inlet and outlet as shown below.
• If there is a difference like shown below, there is a possibility of inside clogged. In this case, replace the strainer.
TROUBLESHOOTING
TROUBLESHOOTING
3-4. No cooling/No heating - (03-40) - 3. Troubleshooting without error code
3-5. Abnormal noise
Forecast of cause
Diagnosis method when abnormal noise is occurred
Abnormal installation (indoor unit/outdoor unit)
Fan failure (indoor unit/outdoor unit)
Compressor failure (outdoor)
Abnormal noise is coming from Indoor unit.
(Check and correct followings)
Abnormal noise is coming from Outdoor
unit.
(Check and correct followings)
TROUBLESHOOTING
tion?
• Is the installation of air suction grille and
front panel normal?
• Is main unit installed in stable condi-
• Is main unit installed in stable condition?
• Is fan guard installed normally?
TROUBLESHOOTING
• Is fan broken or deformed?
• Is the screw of fan loose?
• Is there any object which obstruct the
fan rotation?
• Is fan broken or deformed?
• Is the screw of fan loose?
• Is there any object which obstruct the
fan rotation?
End
Check if vibration noise by loose bolt or
contact noise of piping is happening.
Is compressor locked?
• Check Compressor
Refer to compressor and inverter compressor in "Service parts information"
on page 03-43.
End
3-5. Abnormal noise - (03-41) - 3. Troubleshooting without error code
3-6. Water leaking
MPa MPa
Forecast of cause
Diagnosis method when water leak occurs
Diagnosis method when water is spitting
Erroneous installation
Drain hose failure
out
• Is main unit installed in stable condition?
• Is main unit broken or deformed at the
Is the filter clogged?
time of transportation or maintenance?
TROUBLESHOOTING
TROUBLESHOOTING
• Is drain hose connection loose?
• Is there a trap in drain hose?
Check gas pressure and correct it if there was a gas leak.
• Is drain hose clogged?
Is fan rotating? End
End
3-6. →ater leaking - (03-42) - 3. Troubleshooting without error code
4. Service parts information
MPa MPa
4-1. Compressor
Diagnosis method of compressor (If outdoor unit LED displays error, refer to troubleshooting)
Does not start up Stops soon after starting up Abnormal noise
Is there open or loose connection cable?
TROUBLESHOOTING
Is there open or loose connection cable?
Check if vibration noise by
loose bolt or contact noise of
piping is happening.
TROUBLESHOOTING
Check main PCB, connection
of compressor, and winding
resistance.
(Refer to the next page)
If there is no failure, the
defect of compressor is con-
Is gas pipe valve open?
(Low pressure is too low)
Defective compressor can be
considered.
(due to inside dirt clogging or
broken component)
sidered (Locked compressor
due to clogged dirt or less oil)
Replace compressor.
Check if refrigerant is
leaking.
Replace compressor.
End
Check if strainer is clogged.
(Refer to outdoor EEV in this
End
chapter.)
Check main PCB, connection of compressor and winding resistance. (Refer to the next page)
If there is no failure, the defect of compressor can be considered. (Compression part broken or valve defective.)
Replace compressor.
End
4-1. Compressor - (03-43) - 4. Service parts information
4-2. Inverter compressor
R(U)
(RED)
S(V)
(WHITE)
C (W)
(BLACK)
Main PCB
Main PCB
W402(W)
Compressor
BLACK
WHITE
RED
W400(U)
W401(V)
R(U)
C(W)
S(V)
RED
WHITE
BLACK
¢ Model: AOUH09LUAS1
Check point 1. Check connection
• Check terminal connection of compressor (loose or incorrect wiring)
TROUBLESHOOTING
TROUBLESHOOTING
• Check terminal connection of main PCB (loose or incorrect wiring)
Check point 2. Check winding resistance
Check winding resistance of each terminal.
Resistance value: 1.975 ±7 % Ω at 77 °F (25 °C)
If the resistance value is 0 Ω or infinite, replace compressor.
4-2. Inverter compressor - (03-44) - 4. Service parts information
Check point 3. Replace inverter PCB
If check point 1 to 2 do not improve the symptom, replace main PCB.
TROUBLESHOOTING
TROUBLESHOOTING
4-2. Inverter compressor - (03-45) - 4. Service parts information
¢ Models: AOUH12LUAS1 and AOUH18LUAS1
R(U)
S(V)
(WHITE)
T(W)
(BLACK)
(RED)
Terminal cover opened
C
S
R
Check point 1. Check connection
Check terminal connection of compressor.
(loose or incorrect wiring)
TROUBLESHOOTING
TROUBLESHOOTING
Check point 2. Check winding resistance
Check winding resistance of each terminal.
Resistance value: 1.916 ±8 % Ω at 68 °F (20 °C)
If the resistance value is 0 Ω or infinite, replace compressor.
Check point 3. Replace inverter PCB
If check point 1 to 2 do not improve the symptom, replace main PCB.
4-2. Inverter compressor - (03-46) - 4. Service parts information
4-3. Outdoor unit Electronic Expansion Valve (EEV)
Pipe (In)
Pipe (Out)
Hi TEMP.
Normal TEMP.
CLOSE
Example : Hot Gas
Pipe (In)
Hi TEMP.
OPEN
Example : Hot Gas
Pipe (Out)
Hi TEMP.
¢ Models: AOUH09LUAS1, AOUH12LUAS1, and AOUH18LUAS1
Check point 1. Check connections
Check connection of connector. (Loose connector or open cable)
NOTE: For details of wiring diagram, refer to "→iring diagrams" in Chapter 2. TECHNICAL DATA
AND PARTS LIST on page 02-24.
Check point 2. Check coil of EEV
Remove connector, check each winding resistance of coil.
TROUBLESHOOTING
Read wire Resistance value
TROUBLESHOOTING
→hite - Red
Yellow - Red
Orange - Red
46 Ω ±4 Ω
at 68 °F (20 °C)
Blue - Red
If Resistance value is abnormal, replace EEV.
Check point 3. Check voltage from main PCB
Remove connector and check voltage (DC 12 V)
If it does not appear, replace main PCB.
Check point 4. Check noise at start up
Turn on the power and check the operation noise.
If an abnormal noise does not show, replace main PCB.
Check point 5. Check opening and closing operation of valve
→hen valve is closed, it has a temp. difference
between inlet and outlet
4-3. Outdoor unit Electronic Expansion Valve (EEV) - (03-47) - 4. Service parts information
If it is open, it has no temp. difference between
inlet and outlet
Check point 6. Check strainer
Pipe (In) Pipe (Out)
Pipe (In) Pipe (Out)
• Strainer normally does not have temperature difference between inlet and outlet as shown below.
• If there is a difference like shown below, there is a possibility of inside clogged. In this case,
replace the strainer.
TROUBLESHOOTING
TROUBLESHOOTING
4-3. Outdoor unit Electronic Expansion Valve (EEV) - (03-48) - 4. Service parts information
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