Page 1
AIR CONDITIONER
Wall mounted type
SERVICE MANUAL
INDOOR
OUTDOOR
ASUG09LMAS
ASUG12LMAS
AOUG09LMAS1
AOUG12LMAS1
SR_AS023EF_05
2020.03.25
Page 2
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 © 2020 Fujitsu General Limited. All rights reserved.
Page 3
CONTENTS
1. GENERAL INFORMATION
2. TECHNICAL DATA AND PARTS LIST
3. TROUBLESHOOTING
4. CONTROL AND FUNCTIONS
5. FILED WORKING
Page 4
Page 5
1. GENERAL INFORMATION
SR_CH01_AS023EF_01
2019.12.20
Page 6
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....................................................................................................................01-6
Page 7
1. Specifications
GENERAL
1-1. Indoor unit
INFORMATION
Type
Model name ASUG09LMAS ASUG12LMAS
Power supply 208/230 V ~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Capacity
Input power
Current
EER Cooling
COP Heating
SEER Cooling Btu/hW 26.5 23.0
HSPF Heating Btu/hW 13.0 12.5
Power factor
Moisture removal pints/h (L/h) 2.7 (1.3) 3.8 (1.8)
Maximum operating current*
Fan
Sound pressure level*
Heat exchanger type
Enclosure
Dimensions
(H × W × D)
Weight
Connection pipe
Drain hose
Operation range
Remote controller type
Wall mounted
Inverter heat pump
Cooling
Heating
Heating
(17 °F)
Cooling
Heating
Heating
(17 °F)
Cooling
Heating 4.0 6.0
Cooling
Heating 91.3 92.8
Cooling
2
Heating 7.9 9.4
Cooling
Airflow rate
Heating
Type × Q'ty Crossflow fan × 1
Motor output W 49
Cooling
3
Heating
Dimensions (H × W × D) in (mm)
Fin pitch FPI
Rows × Stages
Pipe type Copper
Fin type Aluminum
Material Polystyrene
Color
Net
Gross 10-7/8 × 36 × 13-1/16 (277 × 914 × 332)
Net
Gross 29 (13)
Size
Method Flare
Material PP+HDPE
Tip diameter in (mm) Ø15/32 (Ø 11.8) (I.D.), Ø19/32 to 21/32 (Ø 15.0 to 16.8) (O.D.)
Cooling
Heating °F (°C) 60 to 86 (16 to 30)
Rated
Min.—Max.
Rated
Min.—Max.
Rated
*1
Max.
Rated
Min.—Max. 0.14—0.92 0.14—1.27
Rated 0.84 1.28
Min.—Max. 0.14—1.61 0.14—1.67
Rated 0.68 1.04
*1
Max. 1.34 1.39
Rated A
HIGH
MED 353 (600) 353 (600)
LOW 265 (450) 265 (450)
QUIET 147 (250) 147 (250)
HIGH 453 (770) 453 (770)
MED 377 (640) 377 (640)
LOW 306 (520) 306 (520)
QUIET 182 (310) 182 (310)
HIGH
MED 36 36
LOW 30 30
QUIET 19 19
HIGH 43 43
MED 38 38
LOW 33 33
QUIET 21 21
Liquid
Gas Ø 3/8 (Ø 9.52)
kW 2.64 3.52
Btu/h 9,000 12,000
kW 1.0—3.2 1.0—3.9
Btu/h 3,400—10,900 3,400—13,300
kW 3.52 4.69
Btu/h 12,000 16,000
kW 0.82—4.4 0.82—5.6
Btu/h 2,800—15,000 2,800—19,100
kW 2.17 3.02
Btu/h 7,400 10,300
kW 2.96 3.72
Btu/h 10,100 12,700
kW
kW/kW 4.19 3.66
Btu/hW 14.3 12.5
kW/kW 4.19 3.66
Btu/hW 14.3 12.5
%
A
CFM (m3/h)
dB (A)
in (mm)
lb (kg)
in (mm)
°F (°C) 64 to 90 (18 to 32)
%RH 80 or less
0.63 0.96
3.1 4.7
88.4 88.8
6.4 6.9
453 (770) 453 (770)
43 43
Main1: 8-1/4 × 26-3/8 × 1-1/16 (210 × 670 × 26.6)
Main2: 4-7/16 × 26-3/8 × 13/16 (112 × 670 × 20)
Sub: 3-5/16 × 26-3/8 × 1/2 (84 × 670 × 13.3)
Approximate color of Munsell N 9.25/
10-5/8 × 32-13/16 × 8-3/4 (270 × 834 × 222)
Wireless (Wired, Mobile app*4 [FGLair™] [option])
Man1: 21
Main2: 23
Sub: 18
Main1: 2 × 10
Main2: 2 × 7
Sub: 1 × 4
White
22 (10)
Ø 1/4 (6.35)
GENERAL
INFORMATION
1-1. Indoor unit - (01-1) - 1. Specifications
Page 8
Type
Model name ASUG09LMAS ASUG12LMAS
NOTES:
GENERAL
INFORMATION
Wall mounted
Inverter heat pump
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °F (26.67 °CDB) /67 °FWB (19.44 °CWB), and outdoor temperature of 95 °FDB (35 °CDB) / 75 °FWB (23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB) /60 °FWB (15.56 °CWB), and outdoor temperature of 47 °FDB (8.33 °CDB) /43 °FWB (6.11 °CWB).
– *1: Heating (17 °F): Indoor temperature of 70 °FDB (21.11 °CDB) /60 °FWB (15.56 °CWB), and outdoor temperature of 17 °FDB (-8.33 °CDB) /15 °FWB (-9.44 °CWB).
– Pipe length: 25 ft (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.
• *2: Maximum current is maximum value when operated within the operation range.
• *3: 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.
• *4: Available on Google Play™ store or on App Store®. Optional WLAN adapter is also required. For details, refer to the setting manual.
GENERAL
INFORMATION
1-1. Indoor unit
- (01-2) - 1. Specifications
Page 9
1-2. Outdoor unit
GENERAL
INFORMATION
Type Inverter heat pump
Model name AOUG09LMAS1 AOUG12LMAS1
Power supply 208/230 V ~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Starting current A 4.0 6.0
Fan
Sound pressure level *1
Heat exchanger type
Compressor
Refrigerant
Refrigerant oil
Enclosure
Dimensions
(H × W × D)
Weight
Connection pipe
Operation range
Drain hose
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB (26.67 °CDB) / 67 °FWB (19.44 °CWB), and outdoor temperature of 95 °FDB (35 °CDB) / 75 °FWB (23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB) / 60 °FWB (15.56 °CWB), and outdoor temperature of 47 °FDB (8.33 °CDB) / 43 °FWB (6.11 °CWB).
– Pipe length: 25 ft (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.
Airflow rate
Type × Q'ty Propeller fan × 1
Motor output W 23
Type DC rotary
Motor output W 900
Net
Gross 23-11/16 × 37 × 14-3/4 (602 × 940 × 375)
Net
Gross 75 (34) 77 (35)
Size
Method Flare
Pre-charge length
Max. length 66 (20)
Max. height difference 49 (15)
Cooling
Heating 954 (1,620) 1,065 (1,810)
Cooling
Heating 48 51
Dimensions
(H × W × D)
Fin pitch FPI 20
Rows × Stages
Pipe type Copper
Fin type
Type R410A
Charge
Type RB68A
Amount
Material Steel sheet
Color
Liquid
Gas Ø 3/8 (Ø 9.52)
Cooling
Heating 5 to 75 (-15 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)
Main1: 19-13/16 × 34-15/16 × 11/16
in (mm)
Type (Material) Aluminum
Surface treatment PC fin
lb oz 2 lb 2 oz 2 lb 3 oz
g 950 1,000
in3 (cm3)
in (mm)
lb (kg)
in (mm)
ft (m)
°F (°C)
Main2: 19-13/16 × 20-1/16 × 11/16
954 (1,620) 1,065 (1,810)
46 49
(504 × 888 × 18.19)
(504 × 510 × 18.19)
Main1: 1 × 24
Main2: 1 × 24
20.7 (340)
Approximate color of Munsell 10YR 7.5/1.0
21-5/16 × 31-7/16 × 11-7/16 (542 × 799 × 290)
68 (31) 71 (32)
Ø 1/4 (Ø 6.35)
14 to 115 (-10 to 46)
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)
Beige
49 (15)
GENERAL
INFORMATION
1-2. Outdoor unit
- (01-3) - 1. Specifications
Page 10
2. Dimensions
Unit: in (mm)
(32-13/16 [834])
Outline of indoor unit
12-7/8 (327)
10-3/4 (273)10-3/4 (273) 2-1/8 (54)
(10-5/8 [270])
1-11/16 (43)
1-11/16 (43)
3/8 (9.5)8-11/16 (220)
for pipe inlet
Ø 2-9/16 (65)
for pipe inlet
Ø 2-9/16 (65)
7-3/16 (182) 7-3/16 (182)
14 (356)13-5/8 (346)1-7/8 (48) 3-5/16 (84)
2-1/2 (63) 2-1/2 (63)
32-13/16 (834)
10-5/8 (270)
8-3/4 (222)
1/8 (3.0)
GENERAL
2-1. Indoor unit
INFORMATION
¢ Models: ASUG09LMAS and ASUG12LMAS
GENERAL
INFORMATION
2-1. Indoor unit - (01-4) - 2. Dimensions
Page 11
Wall hook bracket
Outline of the indoor unit
2 (50) or more
3 (67) or more
2 (40) or more
3 (70) or more
5 (107) or more
60 (1,500) or more
71 (1,800) or more
8 (183) or more
Unit: in (mm)
GENERAL
INFORMATION
Installation space requirement
¢
Provide sufficient installation space for product safety.
GENERAL
INFORMATION
2-1. Indoor unit - (01-5) - 2. Dimensions
Page 12
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
GENERAL
INFORMATION
¢ Models: AOUG09LMAS1 and AOUG12LMAS1
GENERAL
INFORMATION
2-2. Outdoor unit - (01-6) - 2. Dimensions
Page 13
2. TECHNICAL DATA AND PARTS LIST
SR_CH02_AS023EF_01
2020.01.28
Page 14
CONTENTS
2. TECHNICAL DATA AND PARTS LIST
1. Precautions..................................................................................................02-1
2. Indoor unit parts list....................................................................................02-2
2-1. Models: ASUG09LMAS and ASUG12LMAS ..................................................................02-2
3. Outdoor unit parts list.................................................................................02-6
3-1. Models: AOUG09LMAS1 and AOUG12LMAS1 .............................................................02-6
4. Accessories ...............................................................................................02-10
4-1. Indoor unit ....................................................................................................................02-10
4-2. Outdoor unit..................................................................................................................02-10
5. Optional parts ...........................................................................................02-11
5-1. Indoor unit ....................................................................................................................02-11
6. Refrigerant system diagrams...................................................................02-13
6-1. Models: AOUG09LMAS1 and AOUG12LMAS1 ...........................................................02-13
7. Wiring diagrams ........................................................................................02-14
7-1. Indoor unit ....................................................................................................................02-14
7-2. Outdoor unit..................................................................................................................02-15
8. PC board diagrams ...................................................................................02-16
8-1. Models: ASUG09LMAS and ASUG12LMAS ................................................................02-16
8-2. Models: AOUG09LMAS1 and AOUG12LMAS1 ...........................................................02-17
Page 15
1. Precautions
When you start servicing, pay attention to the following points. For detailed precautions, refer to the
installation manual of the products.
• Service personnel
TECHNICAL DATA
AND PARTS LIST
• Work
CAUTION
– 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
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.
– Work 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
Page 16
2. Indoor unit parts list
18
1
4
a
5
6
8
9
10
13
16
2
17
15
12
3
14
19
20
21
b
7
11
9
22
2-1. Models: ASUG09LMAS and ASUG12LMAS
¢ Exterior parts
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
2-1. Models: ASUG09LMAS and ASUG12LMAS - (02-2) - 2. Indoor unit parts list
Page 17
TECHNICAL DATA
AND PARTS LIST
Item no. Part no. Part name Service part
1 9387480009 Bracket panel ♦
2 9387471007 Louver spring ♦
3 9333608006 Bush ♦
4 9313951047 Conduit holder ♦
5 9387714036 Step motor holder assy ♦
6 9901011047 Step motor ♦
7 9332861006 Shaft cover ♦
8 9387590050 Drain pan total assy ♦
9 9387476002 Screw cap ♦
10 9387479003 U/D louver assy ♦
11 9387597035 Wire cover assy ♦
12 9387478020 Under cover R ♦
13 9387596458 Front panel total assy ♦
14 9333704005 Grille clamper R ♦
15 9387799057 Intake grill B ♦
16 9333719009 Grille clamper L ♦
17 9387473001 Air filter ♦
18 9387477023 Under cover L ♦
19 9316177017 Drain cap ♦
20 9316904002 Drain hose assy ♦
21 9318912005 Remote controller holder ♦
22 9332438772 Remote controller ♦
a — Step motor holder —
b — Front panel —
TECHNICAL DATA
AND PARTS LIST
2-1. Models: ASUG09LMAS and ASUG12LMAS - (02-3) - 2. Indoor unit parts list
Page 18
¢ Base, evaporator, and control
50
51
a
b
c
52
d
53
54
55
56
58
57
59
e
f
60
61
63
62
g
65
64
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
2-1. Models: ASUG09LMAS and ASUG12LMAS - (02-4) - 2. Indoor unit parts list
Page 19
TECHNICAL DATA
AND PARTS LIST
Item no. Part no. Part name Service part
50 9387587012 Base assy ♦
51 9383765032 WLAN adapter holder assy ♦
52
9711141422 Main PCB (For 09 model) ♦
9711141439 Main PCB (For 12 model) ♦
53 9387488043 Cable guide ♦
54 9711146076 Display assy ♦
55 9711147011 Indicator PCB ♦
56 9306489045 Terminal ♦
57 9603821012 Brushless motor ♦
58 9387589030 Motor case assy ♦
59 9317250009 Air clean filter assy ♦
60 9332911008 Electric filter holder ♦
61 9387593228 Evaporator total assy ♦
62 9900627041 Thermistor assy ♦
63 9387467000 Room thermistor holder ♦
64 9333628004 Bearing D assy ♦
65 9387055016 Crossflow fan assy ♦
a — Box shield —
b — Control box —
c — PCB holder A —
d — Control cover —
e — Display case assy —
f — Motor case —
g — Motor cover
TECHNICAL DATA
AND PARTS LIST
2-1. Models: ASUG09LMAS and ASUG12LMAS - (02-5) - 2. Indoor unit parts list
Page 20
3. Outdoor unit parts list
1
2
3
5
15
17
a
13
18
19
20
21
b
12
16
9
6
7
8
4
11
10
14
3-1. Models: AOUG09LMAS1 and AOUG12LMAS1
¢ Exterior parts and Chassis
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
3-1. Models: AOUG09LMAS1 and AOUG12LMAS1 - (02-6) - 3. Outdoor unit parts list
Page 21
TECHNICAL DATA
AND PARTS LIST
Item no. Part no. Part name Service part
1 9322556028 Top panel assy ♦
2 9377840004 Protective net ♦
3 9322552259 Cabinet right assy ♦
4 9384268006 Conduit cover ♦
5 9322570055 Switch cover assy ♦
6 9322138002 Thermistor holder ♦
7
9709684030 Main PCB (For 09 model) ♦
9709684047 Main PCB (For 12 model) ♦
8 9900565060 Thermistor assy ♦
9 9900727062 Thermistor assy ♦
10 9900583019 Reactor assy ♦
11 9322418005 Heat sink ♦
12 9383720000 Drain cap assy ♦
13 9323550025 Base assy ♦
14 9322144003 Drain pipe ♦
15 9317903011 Emblem ♦
16 9384265005 Fan guard ♦
17 9322555199 Front panel assy ♦
18 9322136008 Propeller fan ♦
19 9603657017 Brushless motor ♦
20 9322553010 Motor bracket assy ♦
21
9322274021 Condenser total assy (For 09 model) ♦
9322275004 Condenser total assy (For 12 model) ♦
a — Inverter assy
b — Hair pin cushion
TECHNICAL DATA
AND PARTS LIST
3-1. Models: AOUG09LMAS1 and AOUG12LMAS1 - (02-7) - 3. Outdoor unit parts list
Page 22
¢ 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. Models: AOUG09LMAS1 and AOUG12LMAS1 - (02-8) - 3. Outdoor unit parts list
Page 23
TECHNICAL DATA
AND PARTS LIST
Item no. Part no. Part name Service part
50 9384354006 Compressor assy ♦
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 ♦
57 9322535009 S-insulator B ♦
58 9322536020 S-insulator F ♦
59 9322537003 S-insulator H ♦
60 9323045002 S-insulator V ♦
a — Valve bracket —
b — Muffler —
TECHNICAL DATA
AND PARTS LIST
3-1. Models: AOUG09LMAS1 and AOUG12LMAS1 - (02-9) - 3. Outdoor unit parts list
Page 24
4. Accessories
4-1. Indoor unit
Models: ASUG09LMAS and ASUG12LMAS
¢
TECHNICAL DATA
AND PARTS LIST
Operating manual 1 Tapping screw (large) 5
Installation manual 1 Tapping screw (small) 2
Wall hook bracket 1 Cloth tape 1
Part name Exterior Q’ty Part name Exterior Q’ty
TECHNICAL DATA
AND PARTS LIST
Remote controller 1 Filter holder 2
Remote controller
holder
Battery 2
1 Air cleaning filters 1
4-2. Outdoor unit
Models: AOUG09LMAS1 and AOUG12LMAS1
¢
Part name Exterior Q’ty Part name Exterior Q’ty
Installation manual 1 Cable tie 2
Drain pipe 1 Drain cap 5
4-1. Indoor unit - (02-10) - 4. Accessories
Page 25
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
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
¢
TECHNICAL DATA
AND PARTS LIST
Exterior Part name Model name Summary
Easy finger touch operation with LCD
panel. Backlit LCD enables easy
operation in a dark room.
Wire type: Non-polar 2-wire
Optional communication kit is
necessary for installation.
NOTE: When this remote controller
is connected, wireless
remote controller cannot be
Wired remote
controller
UTY-RNRUZ*
used.
TECHNICAL DATA
AND PARTS LIST
Compact remote controller
concentrates on the basic functions
such as Start/Stop, fan control,
temperature setting, and operation
Simple remote
controller
UTY-RSRY
mode.
Wire type: Non-polar 2-wire
Optional communication kit is
necessary for installation.
Compact remote controller
concentrates on the basic functions
such as Start/Stop, fan control, and
Simple remote
controller
UTY-RHRY
temperature setting.
Wire type: Non-polar 2-wire
Optional communication kit is
necessary for installation.
NOTES:
• Available functions may differ by the remote controller. For details, refer to the operation manual.
• When using a Wireless LAN adapter, group controlling system of the wired remote controller is
prohibited.
Others
¢
Exterior Part name Model name Summary
5-1. Indoor unit - (02-11) - 5. Optional parts
connect kit
External
UTY-XWZXZ5
Required when external device is
connected.
Page 26
TECHNICAL DATA
AND PARTS LIST
Exterior Part name Model name Summary
Use to connect with external devices
External input
and output PCB
UTY-XCSXZ2
and air conditioner PCB.
Optional External connect kit is
necessary for installation.
Communication
kit
UTY-TWRXZ2
Use to connect Non-polar 2-core wired
remote controller.
TECHNICAL DATA
AND PARTS LIST
Wireless LAN
adapter
UTY-TFSXF1
Remotely manage an air conditioning
system using mobile devices such as
smartphones and tablets.
5-1. Indoor unit - (02-12) - 5. Optional parts
Page 27
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
6-1. Models: AOUG09LMAS1 and AOUG12LMAS1
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
6-1. Models: AOUG09LMAS1 and AOUG12LMAS1 - (02-13) - 6. Refrigerant system diagrams
Page 28
7. Wiring diagrams
7-1. Indoor unit
Models: ASUG09LMAS and ASUG12LMAS
¢
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
7-1. Indoor unit - (02-14) - 7. Wiring diagrams
Page 29
7-2. Outdoor unit
Models: AOUG09LMAS1 and AOUG12LMAS1
¢
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
7-2. Outdoor unit - (02-15) - 7. Wiring diagrams
Page 30
8. PC board diagrams
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1061 AWG28 WHITE
UL1015 AWG20 GREEN
UL1015 AWG22 RED
UL1015 AWG22 WHITE
UL1015 AWG22 BLACK
RED
WHITE
BLACK
YELLOW
BLUE
RED
ORANGE
YELLOW
PINK
BLUE
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
UL1061 AWG26 WHITE
UL1061 AWG26 RED
UL1061 AWG26 WHITE
UL1061 AWG26 WHITE
UL1061 AWG26 WHITE
UL1061 AWG26 WHITE
UL1061 AWG26 WHITE
UL1007 AWG22 WHITE
UL1007 AWG22 RED
UL1430 AWG26 x 4
WHITE
RED
BLACK
GREEN
12
11
10
9
8
7
6
5
4
3
2
1
4
3
2
1
7
6
5
4
3
2
1
7
6
5
4
3
2
1
3
2
1
4
3
2
1
10
9
8
7
6
5
4
3
2
1
10
9
8
7
6
5
4
3
2
1
7
6
5
4
1
5
4
3
2
1
F4
3.15A
AC250V
W1
B
W2
B
W3
B
E1
B
EARTH
1
2
3
L
N
SERIAL
CN9
B10B-PASK-1
WHITE
CN5
B5 ( 7-2.3 ) B-XASK-1-A
WHITE
CN7
B05B-PLISK-1
WHITE
CN200
S10B-PASK-2
WHITE
CN4
B12B-PASK-1
WHITE
CN6
B04B-PASK-1
WHITE
CN1
B04B-PLIRK-1
RED
CN13
B07B-PASK-1
WHITE
CN301
B07B-PASK-1
WHITE
CN300
B03B-XNISK-A-1
WHITE
CN1
SM05B-SRSS-TB
WHITE
5432
1
LOUVER UP / DOWN
DC FAN MOTOR FM
M
THERMISTOR ( ROOMTEMP. )
THERMISTOR ( PIPE TEMP. )
2-WIRE REMOTE CONTROL UNIT ( OPTION )
UTY-TWRXZ2
COMMUNICATION PCB
K16JS-1600HSE-CA0
FLASH
EMI FILTER
ZCAT1518-0730
2 TURNS
REMOTE
CONTROLLER
( 2-WIRE )
TEST
INDICATOR PCB
K18RB-1800HSE-D0
OUTDOOR UNIT
( POWER SOURCE )
MAIN PCB
ASUG09LMAS : K18RA-1905HSE-C1
ASUG12LMAS : K18RA-1906HSE-C1
CONTROL UNIT
ASUG09LMAS : EZ-0190HHSE
ASUG12LMAS : EZ-0190KHSE
DC340V
DC15V
A
DC12V
DC5V
DC12V
DC12V-3
DC12V
DC5V
DC5V-2
DC5V
CN5 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
Blue
2
CN1 Thermistor Characteristics.
Thermistor
Thermistor ( Pipe temp. )
176.03 k
62.91 k
39.57 k
1.10 V
2.21 V 2.79 V
Thermistor ( Room temp. )
33.62 k
12.54 k
8.04 k
1.15 V
2.22 V 2.77 V
Temperature
( 20 ) ( 30 )
( 0 )
32
68
86
UL1430 AWG26 GRAY
UL1430 AWG26 GRAY
UL1430 AWG26 GRAY
UL1430 AWG26 GRAY
( 4 BLACK )
( 3 GREEN )
( 2 WHITE )
( 1 RED )
1 2 3 4 5 6 7 8 9 10 11 12
1 2 3
1 2 3
1 21 21 2
1
2
3
4
1
2
3
4
CN6
B04B-PASK-1
WHITE
J2
USB5-A4M2-KNSO-01
WHITE
CN308
B04B-PASK-1
WHITE
CN309
B12B-PASK-1
WHITE
CN314
B3B-XH-AM
WHITE
CN313
B3B-XH-AM
WHITE
CN312
B2B-XH-AM
WHITE
CN311
B2B-XH-AM
WHITE
CN310
B2B-XH-AM
WHITE
WIRELESS LAN ADAPTER ( OPTION )
AP-WF1E
EX. OUT1 EX. OUT2
EX. OUT3 EX. IN1
EX. IN2
FLASH
COMMUNICATION PCB
K14YM-1500HSE-CA0
EXTERNAL INPUT AND OUTPUT BOARD ( OPTION )
UTY-XCSXZ2
TYPE A
TYPE B
DC12V-3
8-1. Models: ASUG09LMAS and ASUG12LMAS
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
8-1. Models: ASUG09LMAS and ASUG12LMAS - (02-16) - 8. PC board diagrams
Page 31
8-2. Models: AOUG09LMAS1 and AOUG12LMAS1
W103
B
W104
B
W70
B
W100
B
W101
B
W102
B
W200BW201
B
W400
B
U
W401
B
V
W402
B
W
TEREMINAL
HP-T3114A-2-6P-A1F
TO INDOOR UNIT
L
N
SERIAL
1
2
3
L
N
EARTH
POWER SOURCE
AC208/230V
60Hz
WIRE w/TERMINAL ( CORE )
1015#20
GREEN
TRCB-25-15-12
8 TURNS
FRAME FRAME
EMI FILTER
GRFC-8
1 TURN
EMI FILTER
GRFC-8
1 TURN
UL1015 AWG20
BLACK
UL1015 AWG20
WHITE
UL1015 AWG22
RED
UL1015 AWG16
BLACK
UL1015 AWG16
WHITE
UL1015 AWG16
GREEN
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
THERMISTOR ( DISCHARGE TEMP. )
THERMISTOR ( OUTDOOR TEMP. )
THERMISTOR ( PIPE TEMP. )
1
2
3
4
1
2
3
P1
B04B-PLIRK-1
RED
P5
B03B-PLISK-1
WHITE
DC5V-2
REACTOR
13mH 8A
DC Resistance 415.90 m
( 25 )
77
UL1015
AWG16
GRAY
UL1015
AWG16
BROWN
EMI FILTER
TR-28-16-13
3 TURNS
UL3271 AWG16
BLACK
UL3271 AWG16
WHITE
UL3271 AWG16
RED
RED
WHITE
BLACK
BLACK
BLACK
CM
COMPRESSOR
U-V
V-W
U-W
Winding Resistance
1.975
( 25 )
77
4-WAY VALVE COIL
DC Resistance 2085
(20 )
68
BLACK
BROWN
RED
WHITE
YELLOW
1
2
3
4
5
1
6
7
4
5
P30
B05B-PLISK-1
WHITE
P650
B5 ( 7-2.3 ) B-XASK-1-A
WHITE
DC12V
DC15V
DC340V
YELLOW
WHITE
ORANGE
BLUE
RED
DC FAN MOTOR
FM
EXPANSION VALVE COIL
M
12
11
10
9
8
7
6
5
4
3
2
1
P600
B12B-PASK-1
WHITE
TEST
DC5V
2
1
P60
B2P3-VH-B
WHITE
AC
AC208/230V
( ON )
MAIN PCB
AOUG09LMAS1 : K17LG-1905HUE-C1
AOUG12LMAS1 : K17LG-1906HUE-C1
INVERTER ASSEMBLY
AOUG09LMAS1 : EZ-01911HUE
AOUG12LMAS1 : EZ-01912HUE
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
( 20 ) ( 30 )
( 0 )
32
68
86
P5 Thermistor Characteristics.
Thermistor
Temperature
( 20 ) ( 30 )
( 0 )
32
68
86
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
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
(20 )
68
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
8-2. Models: AOUG09LMAS1 and AOUG12LMAS1 - (02-17) - 8. PC board diagrams
Page 32
TECHNICAL DATA
AND PARTS LIST
TECHNICAL DATA
AND PARTS LIST
8-2. Models: AOUG09LMAS1 and AOUG12LMAS1 - (02-18) - 8. PC board diagrams
Page 33
3. TROUBLESHOOTING
SR_CH03_AS023EF_02
2020.01.30
Page 34
CONTENTS
3. TROUBLESHOOTING
1. Error code ....................................................................................................03-1
1-1. Error code table (Indoor unit and wired remote controller)..............................................03-1
2. Troubleshooting with error code ...............................................................03-2
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit).............03-2
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) ...............03-4
2-3. E: 12. Wired remote controller communication error (Indoor unit) ..................................03-6
2-4. E: 18. External communication error (Indoor unit) ..........................................................03-7
2-5. E: 32. Indoor unit main PCB error (Indoor unit) ..............................................................03-8
2-6. E: 35. MANUAL AUTO button error (Indoor unit)............................................................03-9
2-7. E: 41. Room temperature sensor error (Indoor unit).....................................................03-10
2-8. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) ........................................03-11
2-9. E: 51. Indoor unit fan motor error (Indoor unit) .............................................................03-12
2-10. E: 62. Outdoor unit main PCB error (Outdoor unit).....................................................03-13
2-11. E: 64. PFC circuit error (Outdoor unit) ........................................................................03-14
2-12. E: 71. Discharge thermistor error (Outdoor unit).........................................................03-15
2-13. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit)............................03-16
2-14. E: 74. Outdoor temperature thermistor error (Outdoor unit)........................................03-17
2-15. E: 84. Current sensor error (Outdoor unit) ..................................................................03-18
2-16. E: 94. Trip detection (Outdoor unit).............................................................................03-19
2-17. E: 95. Compressor motor control error (Outdoor unit) ................................................03-20
2-18. E: 97. Outdoor unit fan motor error (Outdoor unit)......................................................03-21
2-19. E: 99. 4-way valve error (Outdoor unit).......................................................................03-23
2-20. E: A1. Discharge temperature error (Outdoor unit).....................................................03-25
3. Troubleshooting without error code........................................................03-27
3-1. Indoor unit—No power..................................................................................................03-27
3-2. Outdoor unit—No power...............................................................................................03-28
3-3. No operation (Power is on)...........................................................................................03-29
3-4. No cooling/No heating ..................................................................................................03-30
3-5. Abnormal noise.............................................................................................................03-32
3-6. Water leaking................................................................................................................03-33
4. Service parts information .........................................................................03-34
4-1. Compressor..................................................................................................................03-34
4-2. Inverter compressor......................................................................................................03-35
4-3. Outdoor unit Electronic Expansion Valve (EEV) ...........................................................03-36
4-4. Indoor unit fan motor ....................................................................................................03-38
4-5. Outdoor unit fan motor..................................................................................................03-39
5. Thermistor resistance values...................................................................03-40
5-1. Indoor unit ....................................................................................................................03-40
5-2. Outdoor unit..................................................................................................................03-41
Page 35
1. Error code
1-1. Error code table (Indoor unit and 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.
E: 11. Serial communication error (Serial
reverse transfer error) (Outdoor unit)
E: 11. Serial communication error (Serial
forward transfer error) (Indoor unit)
TROUBLESHOOTING
E: 12. Wired remote controller
communication error (Indoor unit)
E: 18. External communication error (Indoor
unit)
E: 32. Indoor unit main PCB error (Indoor
unit)
E: 35. MANUAL AUTO button error (Indoor
unit)
E: 41. Room temperature sensor error
(Indoor unit)
E: 42. Indoor unit heat exchanger sensor
error (Indoor unit)
E: 51. Indoor unit fan motor error (Indoor
unit)
E: 62. Outdoor unit main PCB error
(Outdoor unit)
E: 64. PFC circuit error (Outdoor unit) 6 times 4 times Continuous 64
E: 71. Discharge thermistor error (Outdoor
unit)
E: 73. Outdoor unit heat exchanger
thermistor error (Outdoor unit)
E: 74. Outdoor temperature thermistor error
(Outdoor unit)
E: 84. Current sensor error (Outdoor unit) 8 times 4 times Continuous 84
E: 94. Trip detection (Outdoor unit) 9 times 4 times Continuous 94
E: 95. Compressor motor control error
(Outdoor unit)
E: 97. Outdoor unit fan motor error
(Outdoor unit)
E: 99. 4-way valve error (Outdoor unit) 9 times 9 times Continuous 99
E: A1. Discharge temperature error
(Outdoor unit)
Error contents
Indoor unit display Wired
Operation [ ]
(Green)
1 times 1 times Continuous 11
1 times 1 times Continuous 11
1 times 2 times Continuous 12
1 times 8 times Continuous 18
3 times 2 times Continuous 32
3 times 5 times Continuous 35
4 times 1 times Continuous 41
4 times 2 times Continuous 42
5 times 1 times Continuous 51
6 times 2 times Continuous 62
7 times 1 times Continuous 71
7 times 3 times Continuous 73
7 times 4 times Continuous 74
9 times 5 times Continuous 95
9 times 7 times Continuous 97
10 times 1 times Continuous A1
Timer [ ]
(Orange)
Economy [ ]
(Green)
remote
controller
display
TROUBLESHOOTING
1-1. Error code table (Indoor unit and wired remote controller) - (03-1) - 1. Error code
Page 36
2. Troubleshooting with error code
+
-
2-1. E: 11. Serial communication error (Serial reverse transfer
error) (Outdoor unit)
Indicator Indoor unit
Detective actuator Outdoor unit
Forecast of cause
TROUBLESHOOTING
Check point 1. Reset the power and operate
Does error indication show again?
→ If no, go to "Check point 1-2".
Operation indicator 1 time flash
Timer indicator 1 time flash
Economy indicator Continuous flash
Error code E: 11
Main PCB When 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 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 187 V (AC 208 V -10%) to AC 253 V (AC 230 V +10%) appears at
outdoor unit terminal L1 - L2.
↓
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) - (03-2) - 2. Troubleshooting with error code
Page 37
Check point 4. Check serial signal (Reverse transfer signal)
RED
WHITE
BLACK
BLACK
WHITE
1
2
3
L1
L2
+
-
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.
TROUBLESHOOTING
– Outdoor unit fan motor in "Service parts information" on page 03-34
• If outdoor fan motor is abnormal, replace outdoor unit fan motor and main PCB.
• 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) - (03-3) - 2. Troubleshooting with error code
Page 38
2-2. E: 11. Serial communication error (Serial forward transfer
+
-
error) (Indoor unit)
Operation indicator 1 time flash
Indicator Indoor unit
Detective actuator Indoor unit
Forecast of cause
Timer indicator 1 time flash
Economy indicator Continuous flash
Error code E: 11
Main PCB
Fan motor
When the outdoor unit cannot receive the serial signal
from indoor unit more than 10 seconds.
Connection failure
External cause
Main PCB failure
Indoor 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 187 V (AC 208 V -10%) to AC 253 V (AC 230 V +10%) appears at
outdoor unit terminal L—N.
TROUBLESHOOTING
↓
↓
↓
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) - (03-4) - 2. Troubleshooting with error code
Page 39
Check point 4. Check serial signal (reverse transfer signal)
RED
WHITE
BLACK
BLACK
WHITE
1
2
3
L1
L2
+
-
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.
• If it is abnormal, check indoor unit fan motor. (Indoor unit fan motor in "Service parts informa-
tion" on page 03-34)
• If indoor unit fan motor is abnormal, replace indoor unit fan motor and main PCB.
TROUBLESHOOTING
Check point 1-2. Check external cause such as noise
TROUBLESHOOTING
↓
End
• 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
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) - (03-5) - 2. Troubleshooting with error code
Page 40
2-3. E: 12. Wired remote controller communication error (Indoor
unit)
Operation indicator 1 time flash
Indicator Indoor unit
Indoor unit Main PCB When the indoor unit cannot receive the signal from
Detective actuator
Forecast of cause
Wired remote control
Timer indicator 2 time flash
Economy indicator Continuous flash
Error code E: 12
Wired remote controller more than 1 minute during
normal operation.
Terminal connection abnormal
Wired remote control failure
Main PCB failure
TROUBLESHOOTING
Check point 1. Check the connection of terminal
After turning off the power, check & correct the
followings.
• Check the connection of terminal between
remote controller and indoor unit, and check
if there is a disconnection of the cable.
Check point 2. Check connection
Check voltage at CN305 (terminal 1—
3) of UTY-XCBXZ1 (Communication
kit). (Power supply to the remote controller)
Upon correcting the removed connector or mis-wiring, reset the power.
TROUBLESHOOTING
↓
• 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
2-3. E: 12. Wired remote controller communication error (Indoor unit) - (03-6) - 2. Troubleshooting with error code
Page 41
2-4. E: 18. External communication error (Indoor unit)
Operation indicator 1 time flash
Indicator Indoor unit
Detective actuator Indoor unit
Forecast of cause
Check point 1. Check the connection
Timer indicator 8 time flash
Economy indicator Continuous flash
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
TROUBLESHOOTING
• Check any loose or removed connection betw een the main PCB to the external input and output PCB.
-> If there is an abnormal condition, correct it by refer to the installation manual or the “DESIGN
& TECHNICAL MANUAL”.
• 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
TROUBLESHOOTING
↓
↓
↓
End
2-4. E: 18. External communication error (Indoor unit) - (03-7) - 2. Troubleshooting with error code
Page 42
2-5. E: 32. Indoor unit main PCB error (Indoor unit)
Operation indicator 3 time flash
Indicator Indoor unit
Detective actuator Indoor unit main PCB
Forecast of cause
Check point 1. Reset power supply and operate
Timer indicator 2 time flash
Economy indicator Continuous flash
Error code E: 32
When power is on and there is some below case.
1. When model information of EEPROM is incorrect.
2. When the access to EEPROM failed.
External cause
Defective connection of electric components
Main PCB failure
TROUBLESHOOTING
Does error indication show again?
→ If no, go to "Check point 1-2".
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.
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).
TROUBLESHOOTING
↓
↓
↓
End
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.
2-5. E: 32. Indoor unit main PCB error (Indoor unit)
↓
- (03-8) - 2. Troubleshooting with error code
Page 43
2-6. E: 35. MANUAL AUTO button error (Indoor unit)
Operation indicator 3 time flash
Indicator Indoor unit
Indoor unit controller PCB
Detective actuator
Forecast of cause
Indicator PCB
Manual auto switch
Check point 1. Check the MANUAL AUTO button
Timer indicator 5 time flash
Economy indicator Continuous flash
Error code E: 35
When the MANUAL AUTO button becomes on for
consecutive 30 or more seconds.
MANUAL AUTO button failure
Controller PCB and indicator PCB failure
TROUBLESHOOTING
• Check if MANUAL AUTO button is
kept pressed.
• Check On/Off switching operation
by using a meter.
Check point 2. Replace main PCB and indicator PCB
If Check Point 1 does not improve the symptom, change main PCB and indicator PCB.
↓
↓
End
If MANUAL AUTO button is disabled (on/off
switching), replace it.
TROUBLESHOOTING
2-6. E: 35. MANUAL AUTO button error (Indoor unit) - (03-9) - 2. Troubleshooting with error code
Page 44
2-7. E: 41. Room temperature sensor error (Indoor unit)
Indicator Indoor unit
Detective actuator
Forecast of cause
Check point 1. Check connection of connector
• Check if connector is loose or removed.
TROUBLESHOOTING
• Check erroneous connection.
• Check if thermistor cable is open
-> Reset power when reinstalling due to removed connector or incorrect wiring.
Operation indicator 4 time flash
Timer indicator 1 time flash
Economy indicator Continuous flash
Error code E: 41
Indoor unit main PCB
Room temperature thermistor
Room temperature thermistor is open or short is
detected always.
Connector failure
Thermistor failure
Main PCB failure
TROUBLESHOOTING
↓
Check point 2. Remove connector and check thermistor resistance value
• For the room thermistor resistance value, refer to "Thermistor resistance values"
on page 03-40.
• 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 "Wiring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-14.
If the voltage does not appear, replace main PCB.
↓
End
2-7. E: 41. Room temperature sensor error (Indoor unit) - (03-10) - 2. Troubleshooting with error code
Page 45
2-8. E: 42. Indoor unit heat exchanger sensor error (Indoor unit)
Operation indicator 4 time flash
Indicator Indoor unit
Indoor unit main PCB
Detective actuator
Forecast of cause
Heat exchanger temperature
thermistor
Check point 1. Check connection of connector
Timer indicator 2 time flash
Economy indicator Continuous flash
Error code E: 42
When heat exchanger temperature thermistor open or
short circuit is detected.
Connector connection failure
Thermistor failure
Main PCB failure
TROUBLESHOOTING
• Check if connector is loose or removed.
• Check erroneous connection.
• 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 room thermistor resistance value, refer to "Thermistor resistance values"
on page 03-40.
• 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 "Wiring diagrams" in Chapter 2.
If the voltage does not appear, replace main PCB.
TROUBLESHOOTING
↓
↓
TECHNICAL DATA AND PARTS LIST on page 02-14.
↓
End
2-8. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) - (03-11) - 2. Troubleshooting with error code
Page 46
2-9. E: 51. Indoor unit fan motor error (Indoor unit)
Operation indicator 5 time flash
Indicator Indoor unit
Detective actuator Indoor unit
Forecast of cause
Timer indicator 1 time flash
Economy indicator Continuous flash
Error code E: 51
main PCB When 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
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 temp. 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
03-34.)
→ If Indoor unit fan motor is abnormal, replace Indoor unit fan motor.
Check point 4. Replace main PCB
TROUBLESHOOTING
↓
↓
↓
If Check Point 1 to 3 do not improve the symptom, replace main PCB.
↓
End
2-9. E: 51. Indoor unit fan motor error (Indoor unit) - (03-12) - 2. Troubleshooting with error code
Page 47
2-10. E: 62. Outdoor unit main PCB error (Outdoor unit)
Operation indicator 6 time flash
Indicator Indoor unit
Detective actuator Outdoor unit Main PCB
Forecast of cause
Timer indicator 2 time flash
Economy indicator Continuous flash
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
Does error indication show again?
TROUBLESHOOTING
Check point 2. Replace main PCB
Change main PCB.
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
If no, go to "Check point 1-2".
TROUBLESHOOTING
↓
End
2-10. E: 62. Outdoor unit main PCB error (Outdoor unit) - (03-13) - 2. Troubleshooting with error code
Page 48
2-11. E: 64. PFC circuit error (Outdoor unit)
Indicator Indoor unit
Detective actuator Outdoor unit Main PCB
Forecast of cause
Check point 1. 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.
Operation indicator 6 time flash
Timer indicator 4 time flash
Economy indicator Continuous flash
Error code E: 64
• When 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
TROUBLESHOOTING
↓
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
2-11. E: 64. PFC circuit error (Outdoor unit) - (03-14) - 2. Troubleshooting with error code
Page 49
2-12. E: 71. Discharge thermistor error (Outdoor unit)
Operation indicator 7 time flash
Indicator Indoor unit
Outdoor unit main PCB
Detective actuator
Forecast of cause
Discharge pipe temperature
thermistor
Check point 1. Check connection of connector
Timer indicator 1 time flash
Economy indicator Continuous flash
Error code E: 71
When 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
TROUBLESHOOTING
• Check if connector is loose or removed.
• Check erroneous connection.
• 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 discharge temperature thermistor resistance value, refer to "Thermistor
resistance values" on page 03-40.
• 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 "Wiring diagrams" in Chapter 2.
If the voltage does not appear, replace main PCB.
TROUBLESHOOTING
↓
↓
TECHNICAL DATA AND PARTS LIST on page 02-14.
↓
End
2-12. E: 71. Discharge thermistor error (Outdoor unit) - (03-15) - 2. Troubleshooting with error code
Page 50
2-13. E: 73. Outdoor unit heat exchanger thermistor error
(Outdoor unit)
Operation indicator 7 time flash
Indicator Indoor unit
Outdoor unit main PCB
Detective actuator
Forecast of cause
Heat exchanger temperature
thermistor
Timer indicator 3 time flash
Economy indicator Continuous flash
Error code E: 73
When 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
TROUBLESHOOTING
Check point 1. Check connection of connector
• Check if connector is loose or removed.
• Check erroneous connection.
• 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 03-40.
• 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 "Wiring diagrams" in Chapter 2.
If the voltage does not appear, replace main PCB.
TROUBLESHOOTING
↓
↓
TECHNICAL DATA AND PARTS LIST on page 02-14.
↓
End
2-13. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit) - (03-16) - 2. Troubleshooting with error code
Page 51
2-14. E: 74. Outdoor temperature thermistor error (Outdoor unit)
Operation indicator 7 time flash
Indicator Indoor unit
Outdoor unit main PCB When outdoor temperature thermistor open or short
Detective actuator
Forecast of cause
Outdoor temperature thermistor
Check point 1. Check connection of connector
Timer indicator 4 time flash
Economy indicator Continuous flash
Error code E: 74
circuit is detected at power on or while running the
compressor
Connector failure
Thermistor failure
Main PCB failure
TROUBLESHOOTING
• Check if connector is loose or removed.
• Check erroneous connection.
• 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 temperature thermistor resistance value, refer to "Thermistor re-
sistance values" on page 03-40.
• 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 "Wiring diagrams" in Chapter 2.
If the voltage does not appear, replace main PCB.
TROUBLESHOOTING
↓
↓
TECHNICAL DATA AND PARTS LIST on page 02-14.
↓
End
2-14. E: 74. Outdoor temperature thermistor error (Outdoor unit) - (03-17) - 2. Troubleshooting with error code
Page 52
2-15. E: 84. Current sensor error (Outdoor unit)
Operation indicator 8 time flash
Indicator Indoor unit
Detective actuator Outdoor unit main PCB
Forecast of cause
Timer indicator 4 time flash
Economy indicator Continuous flash
Error code E: 84
When 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
TROUBLESHOOTING
Does error indication show again?
Check point 2. 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.
Check point 3. Replace main PCB
If Check point 1, 2 do not improve the symptom,
change main PCB.
↓
↓
↓
End
If no, go to "Check point 1-2".
Upon correcting the removed connector or miswiring, reset the power.
TROUBLESHOOTING
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
2-15. E: 84. Current sensor error (Outdoor unit) - (03-18) - 2. Troubleshooting with error code
Page 53
2-16. E: 94. Trip detection (Outdoor unit)
Operation indicator 9 time flash
Indicator Indoor unit
Detective actuator Outdoor unit
Forecast of cause
Timer indicator 4 time flash
Economy indicator Continuous flash
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
Inverter compressor failure (lock, winding short)
Main PCB failure
TROUBLESHOOTING
Check point 1. Check the outdoor unit fan operation, heat-exchanger, ambient temperature
• No obstructions in air passages?
• 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.
TROUBLESHOOTING
↓
↓
↓
End
2-16. E: 94. Trip detection (Outdoor unit) - (03-19) - 2. Troubleshooting with error code
Page 54
2-17. E: 95. Compressor motor control error (Outdoor unit)
Indicator Indoor unit
Detective actuator Outdoor unit
Forecast of cause
TROUBLESHOOTING
Check point 1. Check Noise from Compressor
Turn on Power and check operation noise.
→ If an abnormal noise show, replace compressor.
Operation indicator 9 time flash
Timer indicator 5 time flash
Economy indicator Continuous flash
Error code E: 95
Main PCB 1. When 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
↓
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-
34.)
→ 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
2-17. E: 95. Compressor motor control error (Outdoor unit) - (03-20) - 2. Troubleshooting with error code
Page 55
2-18. E: 97. Outdoor unit fan motor error (Outdoor unit)
Indicator Indoor unit
Detective actuator Outdoor unit
TROUBLESHOOTING
Forecast of cause
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.
Operation indicator 9 time flash
Timer indicator 7 time flash
Economy indicator Continuous flash
Error code E: 97
Main PCB 1. When 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 2. Check ambient temp. 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 03-34.)
→ If outdoor unit fan motor is abnormal, replace outdoor unit fan motor and main PCB.
↓
2-18. E: 97. Outdoor unit fan motor error (Outdoor unit) - (03-21) - 2. Troubleshooting with error code
Page 56
Check point 4. Check output voltage of main PCB
1
2
3
4
5
6
7
BLACK
WHITE
YELLOW
RED
FM
FAN MOTOR
BROWN
Check outdoor unit circuit diagram and the voltage. (Measure at main PCB side connector)
NOTE:
Red—Black 280 V ±10%
TROUBLESHOOTING
White—Black 15 ± 1.5 V
-> If the voltage is not correct, replace Main PCB.
For details of wiring diagram, refer to "Wiring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-14.
Read wire
DC voltage
↓
End
TROUBLESHOOTING
2-18. E: 97. Outdoor unit fan motor error (Outdoor unit) - (03-22) - 2. Troubleshooting with error code
Page 57
2-19. E: 99. 4-way valve error (Outdoor unit)
Indicator Indoor unit
Detective actuator
TROUBLESHOOTING
Forecast of cause
Operation indicator 9 time flash
Timer indicator 9 time flash
Economy indicator Continuous flash
Error code E: 99
Indoor unit main PCB When the indoor heat exchanger temperature is
Heat exchanger temperature
thermistor
Room temperature thermistor
4-way valve
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 03-40.
→ If defective, replace the thermistor.
↓
2-19. E: 99. 4-way valve error (Outdoor unit) - (03-23) - 2. Troubleshooting with error code
Page 58
Check point 3. Check the solenoid coil and 4-way valve
• Solenoid coil
Remove CN501 from PCB and check the resistance value of coil. Resistance value is 1.22 kΩ
— 1.49 kΩ (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 CN501 of Main PCB.
→ Check if AC 187 V (AC 208 V -10%) to AC 253 V (AC 230 V +10%) appears at CN501 of Main
TROUBLESHOOTING
PCB.
• Heating operation
→ If it is not voltage, Replace Main PCB.
• Cooling operation
→ If it is voltage, Replace Main PCB.
↓
TROUBLESHOOTING
↓
Check point 5. Replace main PCB
If Check Point 1 to 4 do not improve the symptom, replace main PCB.
↓
End
2-19. E: 99. 4-way valve error (Outdoor unit) - (03-24) - 2. Troubleshooting with error code
Page 59
2-20. E: A1. Discharge temperature error (Outdoor unit)
Indicator Indoor unit
Detective actuator
Forecast of cause
TROUBLESHOOTING
Check point 1. Check if 3-way valve is open
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.
Operation indicator 10 time flash
Timer indicator 1 time flash
Economy indicator Continuous flash
Error code E: A1
Outdoor unit main PCB Protection stop by discharge temperature ≥ 230 °F
Discharge temperature thermistor
(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
Discharge temperature thermistor failure
For heating operation, check liquid side of the 3-way valve.
exchanger
Insufficient refrigerant
Main PCB failure
TROUBLESHOOTING
↓
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
03-34.
• 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-
34.)
↓
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
03-40.
↓
2-20. E: A1. Discharge temperature error (Outdoor unit) - (03-25) - 2. Troubleshooting with error code
Page 60
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
2-20. E: A1. Discharge temperature error (Outdoor unit) - (03-26) - 2. Troubleshooting with error code
Page 61
3. Troubleshooting without error code
+
-
3-1. Indoor unit—No power
Forecast of cause
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.
Power supply failure
External cause
Electrical components defective
TROUBLESHOOTING
↓
↓
Check point 3. Check electrical components
Check the voltage of power supply.
Check if AC 187 to 253 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 - (03-27) - 3. Troubleshooting without error code
Page 62
3-2. Outdoor 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 &
TECHNICAL MANUAL”.
↓
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 electrical components
Check the voltage of power supply.
Check if AC 187 to 253 V appears at outdoor unit terminal L1 - L2
→ 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 varistor in main 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.
TROUBLESHOOTING
↓
↓
↓
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 - (03-28) - 3. Troubleshooting without error code
Page 63
3-3. No operation (Power is on)
Forecast of cause
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?
Setting/ Connection failure
External cause
Electrical components defective
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 CN305 (terminal 1—3) of UTY-XCBXZ1(Communication kit).
(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) - (03-29) - 3. Troubleshooting without error code
Page 64
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
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”.
↓
TROUBLESHOOTING
↓
↓
↓
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 03-34.
• Check compressor.
Refer to compressor in "Service parts information" on page 03-34.
Refer to inverter compressor in "Service parts information" on page 03-34.
NOTE:
When recharging the refrigerant, make sure to perform vacuuming,
and recharge the specified amount.
↓
End
3-4. No cooling/No heating - (03-30) - 3. Troubleshooting without error code
Page 65
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 - (03-31) - 3. Troubleshooting without error code
Page 66
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)
• Is main unit installed in stable condition?
TROUBLESHOOTING
• Is the installation of air suction grille and
front panel normal?
• Is fan broken or deformed?
• Is the screw of fan loose?
• Is there any object which obstruct the
fan rotation?
Abnormal noise is coming from Indoor unit.
(Check and correct followings)
↓ ↓
• Is main unit installed in stable condition?
• Is fan guard installed normally?
↓
• 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.
TROUBLESHOOTING
↓
↓
↓
Is compressor locked?
• Check Compressor
Refer to compressor and inverter compressor in "Service parts information"
on page 03-34.
↓
End
3-5. Abnormal noise - (03-32) - 3. Troubleshooting without error code
Page 67
3-6. Water leaking
MPa MPa
Forecast of cause
Diagnosis method when water leak occurs
• Is main unit installed in stable condition?
• Is main unit broken or deformed at the
time of transportation or maintenance?
TROUBLESHOOTING
• Is drain hose connection loose?
• Is there a trap in drain hose?
• Is drain hose clogged?
Is fan rotating? End
Erroneous installation
Drain hose failure
Diagnosis method when water is spitting
out
Is the filter clogged?
↓ ↓
Check gas pressure and correct it if there was a gas leak.
↓
TROUBLESHOOTING
↓
↓
End
3-6. Water leaking - (03-33) - 3. Troubleshooting without error code
Page 68
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
Check main PCB, connection
of compressor, and winding
resistance.
(Refer to the next page)
→ If there is no failure, the
defect of compressor is considered (Locked compressor
due to clogged dirt or less oil)
Replace compressor.
Is there open or loose connection cable?
Check if vibration noise by
loose bolt or contact noise of
piping is happening.
↓ ↓ ↓
Defective compressor can be
Is gas pipe valve open?
(Low pressure is too low)
considered.
(due to inside dirt clogging or
broken component)
↓
Check if refrigerant is
leaking.
↓ ↓
Replace compressor.
↓ ↓ ↓
TROUBLESHOOTING
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 - (03-34) - 4. Service parts information
Page 69
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
Check point 1. Check connection
• Check terminal connection of compressor (loose or incorrect wiring)
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 Ω ± 7% at 77 °F (25°C)
TROUBLESHOOTING
→ If the resistance value is 0 Ω or infinite, replace compressor.
↓
Check point 3. Replace inverter PCB
4-2. Inverter compressor - (03-35) - 4. Service parts information
If check point 1 to 2 do not improve the symptom, replace main PCB.
Page 70
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.
Check point 1. Check connections
Check connection of connector. (Loose connector or open cable)
NOTE: For details of wiring diagram, refer to "Wiring diagrams" in Chapter 2. TECHNICAL DATA
AND PARTS LIST on page 02-14.
Check point 2. Check coil of EEV
Remove connector, check each winding resistance of coil.
Read wire Resistance value
1 (Red)—2 (Blue)
TROUBLESHOOTING
→ 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
1 (Red)—3 (Orange)
1 (Red)—4 (Yellow)
1 (Red)—5 (White)
46 Ω ± 4 Ω
at 68°F (20°C)
TROUBLESHOOTING
When valve is closed, it has a temp. difference
between inlet and outlet
4-3. Outdoor unit Electronic Expansion Valve (EEV) - (03-36) - 4. Service parts information
If it is open, it has no temp. difference between
inlet and outlet
Page 71
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) - (03-37) - 4. Service parts information
Page 72
4-4. Indoor unit fan motor
1 DC voltage
4 Earth terminal
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 resistance of indoor fan motor
Refer to below. Circuit-test “Vm” and “GND” terminal
NOTE: Vm: DC voltage, GND: Earth terminal
→ If they are short-circuited (below 300 kΩ), replace indoor fan motor and controller PCB.
TROUBLESHOOTING
Pin number
(wire color)
1 (Red) DC voltage (Vm)
2 No function
3 No function
4 (Black) Earth terminal (GND)
5 (White) Control voltage (Vcc)
6 (Yellow) Speed command (Vsp)
7 (Brown)) Feed back (FG)
Terminal function
(symbol)
TROUBLESHOOTING
4-4. Indoor unit fan motor - (03-38) - 4. Service parts information
Page 73
4-5. Outdoor unit fan motor
1 DC voltage
4 Earth terminal
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 resistance of outdoor fan motor
Refer to below. Circuit-test “Vm” and “GND” terminal
NOTE: Vm: DC voltage, GND: Earth terminal
→ If they are short-circuited (below 300 kΩ), replace outdoor fan motor and controller PCB.
TROUBLESHOOTING
Pin number
(wire color)
1 (Red) DC voltage (Vm)
2 No function
3 No function
4 (Black) Earth terminal (GND)
5 (White) Control voltage (Vcc)
6 (Yellow) Speed command (Vsp)
7 (Brown)) Feed back (FG)
Terminal function
(symbol)
TROUBLESHOOTING
4-5. Outdoor unit fan motor - (03-39) - 4. Service parts information
Page 74
5. Thermistor resistance values
5-1. Indoor unit
¢ Room temperature thermistor
TROUBLESHOOTING
¢ Heat exchanger temperature thermistor
Temperature °F (°C) Resistance (kΩ) Voltage (V)
14.0 (-10.0) 58.25 0.73
23.0 (-5.0) 44.03 0.93
32.0 (0.0) 33.62 1.15
41.0 (5.0) 25.93 1.39
50.0 (10.0) 20.18 1.66
59.0 (15.0) 15.84 1.94
68.0 (20.0) 12.54 2.22
77.0 (25.0) 10.00 2.50
86.0 (30.0) 8.04 2.77
95.0 (35.0) 6.51 3.03
104.0 (40.0) 5.30 3.27
113.0 (45.0) 4.35 3.49
TROUBLESHOOTING
Temperature °F (°C) Resistance (kΩ) Voltage (V)
-22.0 (-30.0) 1,131.91 0.21
-13.0 (-25.0) 804.52 0.29
-4.0 (-20.0) 579.59 0.40
5.0 (-15.0) 422.89 0.53
14.0 (-10.0) 312.27 0.69
23.0 (-5.0) 233.21 0.88
32.0 (0.0) 176.03 1.10
41.0 (5.0) 134.23 1.36
50.0 (10.0) 103.34 1.63
59.0 (15.0) 80.28 1.92
68.0 (20.0) 62.91 2.21
77.0 (25.0) 49.70 2.51
86.0 (30.0) 39.57 2.79
95.0 (35.0) 31.74 3.06
104.0 (40.0) 25.64 3.30
113.0 (45.0) 20.85 3.53
122.0 (50.0) 17.06 3.73
131.0 (55.0) 14.05 3.90
140.0 (60.0) 11.64 4.02
149.0 (65.0) 9.69 4.19
5-1. Indoor unit - (03-40) - 5. Thermistor resistance values
Page 75
5-2. Outdoor unit
¢ Discharge temperature thermistor
TROUBLESHOOTING
Temperature °F (°C) Resistance (kΩ) Voltage (V)
-22.0 (-30.0) 1,013.11 0.06
-12.0 (-25.0) 729.09 0.09
-4.0 (-20.0) 531.56 0.12
5.0 (-15.0) 392.31 0.16
14.0 (-10.0) 292.91 0.21
23.0 (-5.0) 221.09 0.28
32.0 (0.0) 168.60 0.36
41.0 (5.0) 129.84 0.46
50.0 (10.0) 100.91 0.57
59.0 (15.0) 79.12 0.71
68.0 (20.0) 62.55 0.86
77.0 (25.0) 49.84 1.03
86.0 (30.0) 40.01 1.23
95.0 (35.0) 32.35 1.43
104.0 (40.0) 26.34 1.65
113.0 (45.0) 21.58 1.88
122.0 (50.0) 17.79 2.11
131.0 (55.0) 14.75 2.34
140.0 (60.0) 12.30 2.57
149.0 (65.0) 10.32 2.79
158.0 (70.0) 8.70 3.00
167.0 (75.0) 7.36 3.19
176.0 (80.0) 6.27 3.37
185.0 (85.0) 5.36 3.54
194.0 (90.0) 4.60 3.69
203.0 (95.0) 3.96 3.83
212.0 (100.0) 3.43 3.96
221.0 (105.0) 2.98 4.07
230.0 (110.0) 2.60 4.17
239.0 (115.0) 2.27 4.26
248.0 (120.0) 2.00 4.33
TROUBLESHOOTING
5-2. Outdoor unit - (03-41) - 5. Thermistor resistance values
Page 76
¢ Heat exchanger temperature thermistor
TROUBLESHOOTING
Temperature °F (°C) Resistance (kΩ) Voltage (V)
-22.0 (-30.0) 95.58 0.24
-12.0 (-25.0) 68.90 0.32
-4.0 (-20.0) 50.31 0.43
5.0 (-15.0) 37.19 0.57
14.0 (-10.0) 27.81 0.73
23.0 (-5.0) 21.02 0.92
32.0 (0.0) 16.05 1.14
41.0 (5.0) 12.38 1.39
50.0 (10.0) 9.63 1.65
59.0 (15.0) 7.56 1.93
68.0 (20.0) 5.98 2.21
77.0 (25.0) 4.77 2.49
86.0 (30.0) 3.84 2.77
95.0 (35.0) 3.11 3.02
104.0 (40.0) 2.53 3.26
113.0 (45.0) 2.08 3.48
122.0 (50.0) 1.71 3.68
131.0 (55.0) 1.42 3.85
140.0 (60.0) 1.19 4.00
149.0 (65.0) 1.00 4.13
158.0 (70.0) 0.84 4.25
167.0 (75.0) 0.71 4.35
176.0 (80.0) 0.61 4.43
TROUBLESHOOTING
¢ Outdoor temperature thermistor
Temperature °F (°C) Resistance (kΩ) Voltage (V)
-22.0 (-30.0) 224.33 0.73
-12.0 (-25.0) 159.71 0.97
-4.0 (-20.0) 115.24 1.25
5.0 (-15.0) 84.21 1.56
14.0 (-10.0) 62.28 1.90
23.0 (-5.0) 46.58 2.26
32.0 (0.0) 35.21 2.61
41.0 (5.0) 26.88 2.94
50.0 (10.0) 20.72 3.25
59.0 (15.0) 16.12 3.52
68.0 (20.0) 12.64 3.76
77.0 (25.0) 10.00 3.97
86.0 (30.0) 7.97 4.14
95.0 (35.0) 6.40 4.28
104.0 (40.0) 5.18 4.41
113.0 (45.0) 4.21 4.51
122.0 (50.0) 3.45 4.59
131.0 (55.0) 2.85 4.65
5-2. Outdoor unit - (03-42) - 5. Thermistor resistance values
Page 77
4. CONTROL AND FUNCTIONS
SR_CH04_AS023EF_02
2020.03.25
Page 78
CONTENTS
4. CONTROL AND FUNCTIONS
1. Compressor frequency control..................................................................04-1
1-1. Cooling operation ...........................................................................................................04-1
1-2. Heating operation ...........................................................................................................04-2
1-3. Dry operation..................................................................................................................04-3
1-4. Compressor frequency at normal start-up ......................................................................04-3
1-5. Compressor frequency limitation by outdoor temperature ..............................................04-4
2. Auto changeover operation........................................................................04-5
3. Fan control...................................................................................................04-7
3-1. Indoor fan control............................................................................................................04-7
3-2. Outdoor fan control.......................................................................................................04-11
4. Louver control ...........................................................................................04-13
4-1. Vertical airflow direction louver control .........................................................................04-13
4-2. Adjust the horizontal louver ..........................................................................................04-13
4-3. Swing operation............................................................................................................04-13
5. Timer operation control............................................................................04-14
5-1. Wireless remote control................................................................................................04-14
5-2. Wired remote control ....................................................................................................04-16
6. Defrost operation control .........................................................................04-19
6-1. Defrost operation in heating operation stopped............................................................04-20
7. Various control..........................................................................................04-21
7-1. Auto restart...................................................................................................................04-21
7-2. MANUAL AUTO operation............................................................................................04-21
7-3. Forced cooling operation..............................................................................................04-22
7-4. 10 °C HEAT operation..................................................................................................04-22
7-5. ECONOMY operation...................................................................................................04-23
7-6. POWERFUL operation ................................................................................................04-23
7-7. Compressor preheating................................................................................................04-23
7-8. Electronic expansion valve control ...............................................................................04-24
7-9. Prevention to restart for 3 minutes (3 minutes st) .........................................................04-24
7-10. 4-way valve control.....................................................................................................04-24
7-11. Outdoor unit low noise operation................................................................................04-24
8. Various protections...................................................................................04-25
8-1. Discharge gas temperature over-rise prevention control ..............................................04-25
8-2. Anti-freezing control (cooling and dry mode) ................................................................04-25
8-3. Current release control.................................................................................................04-26
8-4. Cooling pressure over-rise protection...........................................................................04-26
8-5. Low outdoor temperature protection.............................................................................04-26
8-6. High temperature and high pressure release control....................................................04-27
Page 79
1. Compressor frequency control
36°C
A zone
34°C
32°C
B zone
30°C
21°C
C zone
19°C
D zone
E zone
F zone
10°C
0°C
12°C
2°C
Outdoor
temperature drops
Outdoor
temperature rises
1-1. Cooling operation
CONTROL AND
FUNCTIONS
A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference
or variation between a set temperature and present room temperature, and controls the operation
frequency of the compressor.
• If the room temperature is 6.0 °C higher than a set temperature, the compressor operation frequency will attain to maximum performance.
• If the room temperature is 1.0 °C lower than a set temperature, the compressor will be stopped.
• When the room temperature is within the range of +6.0°C to -1.0°C of the setting temperature, the
compressor frequency is controlled within the range shown in the table below. However, the maximum frequency is limited in the range shown in the figure below based on the indoor fan mode
and the outdoor temperature.
• Compressor frequency range
Model name Minimum frequency Maximum frequency
ASUG09LMAS 12 rps 67 rps
ASUG12LMAS 12 rps 89 rps
• Limit of maximum speed based on outdoor temperature
CONTROL AND
FUNCTIONS
1-1. Cooling operation - (04-1) - 1. Compressor frequency control
Model name
ASUG09LMAS
ASUG12LMAS
Outdoor
temperature
A zone 67 47 36 26
B zone 67 47 36 26
C zone 67 47 36 26
D zone 54 42 34 26
E zone 54 42 34 26
F zone 54 42 34 26
A zone 89 54 38 26
B zone 89 54 38 26
C zone 89 54 38 26
D zone 62 44 38 26
E zone 62 44 38 26
F zone 62 44 38 26
zone
Unit: rps
Indoor unit fan mode
HIGH MED LOW QUIET
Page 80
1-2. Heating operation
A zone
12°C
B zone
14°C
C zone
-10°C
-12°C
Outdoor
temperature rises
Outdoor
temperature drops
CONTROL AND
FUNCTIONS
A sensor (room temperature thermistor) built in indoor unit body will usually perceive difference or
variation between setting temperature and present room temperature, and controls operation frequency of compressor.
• If the room temperature is 6.0 °C lower than a set temperature, the compressor operation frequency will attain to maximum performance.
• If the room temperature is 1.0 °C higher than a set temperature, the compressor will be stopped.
• When the room temperature is within the range of +1.0°C to -6.0°C of the setting temperature, the
compressor frequency is controlled within the range shown below.
• Compressor frequency range
Unit: rps
Model name Minimum frequency Maximum frequency
ASUG09LMAS
ASUG12LMAS
12 110
• Limit of maximum speed based on outdoor temperature
In heating operation, maximum frequency is defined by outdoor temperature and fan mode.
CONTROL AND
FUNCTIONS
1-2. Heating operation - (04-2) - 1. Compressor frequency control
Model name
ASUG09LMAS
ASUG12LMAS
Outdoor
Indoor unit fan mode
temperature
zone
HIGH MED LOW QUIET
A zone 110 89 77 67
B zone 110 89 77 67
C zone 110 89 77 36
Unit: rps
Page 81
1-3. Dry operation
Ts+0.5°C
Ts -1.5°C
Ts-0.5°C
Ts+1.5°C
X zone
J zone
Y zone
Room temperature drops
Room temperature rises
Ts: Set temperature
Frequency I
Frequency II
Frequency III
Frequency IV
Frequency V
Frequency VI
Frequency VII
Time 1
Time 2 Time 3
Time 4
Time 5
Time 6
Time 7
CONTROL AND
FUNCTIONS
The compressor rotation frequency shall change according to the temperature, set temperature, and
room temperature variation which the room temperature sensor of the indoor unit has detected as
shown in the table below.
Zone is defined by set temperature and room temperature.
• Compressor frequency range
Unit: rps
Model name Outdoor temperature zone Operating frequency
ASUG09LMAS
ASUG12LMAS
X zone 22
J zone 16
Y zone 0
• Compressor control based on room temperature
CONTROL AND
FUNCTIONS
1-4. Compressor frequency at normal start-up
¢ Models: AOUG09LMAS1 and AOUG12LMAS1
Compressor frequency soon after starting is controlled as below.
1-3. Dry operation - (04-3) - 1. Compressor frequency control
Frequency (rps)
Time (sec)
I II III IV V VI VII
45 56 68 77 84 93 103
1 2 3 4 5 6 7
60 140 170 220 280 360 430
Page 82
1-5. Compressor frequency limitation by outdoor temperature
F zone
38°C
E zone
19°C
D zone
10°C
C zone
B zone
A zone
0°C
-10°C
F zone
19°C
E zone
5°C
D zone
0°C
C zone
B zone
A zone
-15°C
-25°C
The minimum compressor frequency is limited by outdoor temperature as below.
• Cooling/Dry mode
CONTROL AND
FUNCTIONS
Model name Outdoor temperature zone
AOUG09LMAS1
AOUG12LMAS1
• Heating mode
Limitation of compressor
frequency
A zone 35 rps
B zone 35 rps
C zone 35 rps
D zone 15 rps
E zone 15 rps
F zone 36 rps
CONTROL AND
FUNCTIONS
Model name Outdoor temperature zone
Limitation of compressor
frequency
A zone 37 rps
B zone 37 rps
AOUG09LMAS1
AOUG12LMAS1
C zone 36 rps
D zone 15 rps
E zone 15 rps
1-5. Compressor frequency limitation by outdoor temperature - (04-4) - 1. Compressor frequency control
F zone 1 rps
Page 83
2. Auto changeover operation
When the air conditioner is set to AUTO mode by remote controller, operation starts in the optimum
mode from among heating, cooling, dry and monitoring modes. During operation, the optimum mode
is automatically switched in accordance with temperature changes. The temperature can be set between 18°C and 30°C in 1.0°C steps.
• When operation starts, indoor fan and outdoor fan are operated for around 1 minute.
Room temperature and outdoor temperature are sensed, and the operation mode is selected in
accordance with the table below.
Room temperature Operation mode
Tr > Ts + 2°C Cooling
Ts + 2°C ≥ Tr ≥ Ts - 2°C Middle zone
Tr < Ts - 2°C Heating
Tr: Room temperature
Ts: Setting temperature
CONTROL AND
FUNCTIONS
NOTE:
When the operation mode is middle zone, indoor unit operation mode is selected as below.
• Same operation mode is selected as outdoor unit.
If outdoor unit is operating in cooling and heating mode, indoor unit will be operated by
the same operation mode.
• Selected by outdoor temperature.
If outdoor unit is operating in other than cooling and heating mode, indoor unit will be operated according to the outdoor temperature as below.
Outdoor temp. Operation mode
25°C or more Cooling
Less than 25°C Heating
• When the compressor was stopped for 6 consecutive minutes by temperature control function after the cooling or heating mode was selected as above, operation is switched to monitoring mode
and the operation mode selection is done again.
• When the middle zone is selected on the predetermining of the operation mode, the operation
mode before the changing to the monitoring mode is selected.
CONTROL AND
FUNCTIONS
- (04-5) -
2. Auto changeover operation
Page 84
Start
Room temp. >
Ts+2°C?
Cooling operationHeating operation
Auto change over is
second or more?
No
Yes
Ts: Setting temperarure
Thermostat remains
in off state for 6 minutes
or longer?
System stops
or operation command
other than auto changeover
operation?
Middle zone
Operation mode of
outdoor unit: Cooling?
Outdoor temp.
< 25
°C?
Operation mode before
the monitor mode
is cooling mode?
Monitor
mode
Room temp. <
Ts-2°C?
No
Yes
No
Yes
No
Yes
No
Yes
No
No
Operation mode of
outdoor unit: Heating?
Yes
Yes
No
System stops
or operation command
other than auto changeover
operation?
Yes
No
Yes
No
Thermostat remains
in off state for 6 minutes
or longer?
Yes
No
CONTROL AND
FUNCTIONS
Operation flow chart
CONTROL AND
FUNCTIONS
- (04-6) - 2. Auto changeover operation
Page 85
3. Fan control
3-1. Indoor fan control
¢ Fan speed
CONTROL AND
FUNCTIONS
Tr: Room temperature
Ts: Setting temperature
Indoor fan speed is defined as below.
Operation mode Fan mode
Heating
Cooling/Fan
Dry
Speed (rpm)
ASUG09LMAS
ASUG12LMAS
POWERFUL 1,290
HIGH 1,220
MED+ 1,140
MED 1,060
LOW 900
QUIET 630
Cool air prevention 550
S-LOW 470
POWERFUL 1,290
HIGH 1,220
MED 1,000
LOW 810
QUIET 550
Soft quiet
S-LOW
490*
470*
X zone: 550
J zone:550
CONTROL AND
FUNCTIONS
1
2
*1: Fan mode only
*2: Cooling mode only
¢ Fan operation
Airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH while indoor unit fan
only runs.
When fan mode is set at AUTO, it operates on MED fan speed.
3-1. Indoor fan control
- (04-7) - 3. Fan control
Page 86
¢ Cooling operation
When room
temperature rises
When room
temperature drops
Tr - Ts ≥ 2°C
HIGH mode
MED mode
LOW mode
2°C > Tr - Ts ≥ 1°C
1°C > Tr - Ts
Tr - Ts ≥ 2.5°C
2.5
°C > Tr - Ts ≥ 1.5°C
1.5°C > Tr - Ts
When the room
temperature rises
When the room
temperature drops
LOW mode
MED mode
MED+ mode
Tr - Ts ≥ -1°C
-2°C > Tr - Ts
Tr - Ts ≥ -1.5°C
-1.5°C > Tr - Ts ≥ -2.5°C
-2.5°C > Tr - Ts
-1°C > Tr - Ts ≥ -2°C
Switch the airflow AUTO, and indoor fan motor will run according to room temperature, as below.
On the other hand, if switched in HIGH—QUIET, indoor motor will run at a constant airflow of COOL
operation modes QUIET, LOW, MED, HIGH as shown in “Fan speed” above.
Airflow change over (Cooling: Auto)
¢ Dry operation
During dry operation, fan speed setting can not be changed as shown in “Fan speed” above.
CONTROL AND
FUNCTIONS
¢ Heating operation
Switch the airflow AUTO, and the indoor fan motor will run according to a room temperature, as below.
On the other hand, if switched in HIGH—QUIET, the indoor motor will run at a constant airflow of
HEAT operation modes QUIET, LOW, MED, HIGH as shown in “Fan speed” above.
Airflow change over (Heating: Auto)
CONTROL AND
FUNCTIONS
3-1. Indoor fan control - (04-8) - 3. Fan control
Page 87
¢ Cool air prevention control (heating mode)
42°C
Indoor heat exchanger
temperature rises
HIGH
or setting fan mode*
Cool air prevention
S-LOW
Indoor heat exchanger
temperature drops
39°C
37°C
30°C
37°C
34°C
32°C
28°C
MED+
or setting fan mode*
LOW
or setting fan mode*
*: Lower speed is selected.
42°C
Indoor heat exchanger
temperature rises
HIGH
or setting fan mode*
Indoor heat exchanger
temperature drops
39°C
37°C
30°C
37°C
34°C
32°C
28°C
MED+
or setting fan mode*
LOW
or setting fan mode*
*: Lower speed is selected.
LOW
or setting fan mode*
LOW
or setting fan mode*
CONTROL AND
FUNCTIONS
The maximum value of the indoor fan speed is set as shown below, based on the detected temperature by the indoor heat exchanger sensor on heating mode.
• Normal operation
7 minutes later:
CONTROL AND
FUNCTIONS
3-1. Indoor fan control - (04-9) - 3. Fan control
Page 88
• Powerful operation
42°C
Indoor heat exchanger
temperature rises
HIGH
Cool air prevention
S-LOW
Indoor heat exchanger
temperature drops
39°C
37°C
30°C
37°C
34°C
32°C
28°C
POWERFUL
LOW
42°C
Indoor heat exchanger
temperature rises
HIGH
Indoor heat exchanger
temperature drops
39°C
37°C
30°C
37°C
34°C
32°C
28°C
POWERFUL
LOW
LOW
LOW
Indoor heat exchanger
temperature rises
Indoor heat exchanger
temperature drops
39°C
34°C
AUTO
LOW
Compressor
On
Off
Indoor fan
setting airflow
S-LOW
Off
10 30 60 180 60 180 60 10 30 (sec)
Indoor fan speed
7 minutes later:
CONTROL AND
FUNCTIONS
¢ Moisture return prevention control (cooling and dry mode)
• 10 °C HEAT operation
Switch the airflow AUTO at cooling mode, and the indoor fan motor will run as shown below.
CONTROL AND
FUNCTIONS
3-1. Indoor fan control - (04-10) - 3. Fan control
Page 89
3-2. Outdoor fan control
21°C
Outside air
temperature rises
Z zone
Y zone
F zone
G zone
Outside air
temperature drops
12°C
2°C
19°C
10°C
0°C
¢ Outdoor fan motor
¢ Fan speed
CONTROL AND
FUNCTIONS
This outdoor unit has a DC fan motor. (Control method is different between AC and DC motors.)
Model: AOUG09LMAS1
Fan speed is defined by outdoor temperature and compressor frequency.
• Outside air temperature zone selection
Unit: rpm
CONTROL AND
FUNCTIONS
Fan step
Cooling
Heating
Dry Cooling or dry
Y zone Y zone Z zone F zone G zone
S-HIGH2 — 1,070 — — — —
S-HIGH1 990 1,070 — — — —
HIGH1 990 1,070 — — — —
10 — 1,070 — — — —
9 990 1,070 990 350 260 200
8 990 1,070 990 350 260 200
7 820 1,040 820 350 260 200
6 820 820 820 250 200 170
5 820 700 820 220 200 170
4 740 610 740 220 200 170
3 660 510 660 220 200 170
2 610 510 610 220 200 170
1 600 510 600 220 200 170
NOTE:
After defrost control on the heating mode, the fan speed is kept higher regardless of the
compressor frequency.
Fan speed after defrost control: 1,070 rpm
3-2. Outdoor fan control
- (04-11) - 3. Fan control
Page 90
Model: AOUG12LMAS1
21°C
Outside air
temperature rises
Z zone
Y zone
F zone
G zone
Outside air
temperature drops
12°C
2°C
19°C
10°C
0°C
Fan speed is defined by outdoor temperature and compressor frequency.
• Outside air temperature zone selection
Unit: rpm
CONTROL AND
FUNCTIONS
Fan step
Cooling
Heating
Dry Cooling or dry
Y zone Y zone Z zone F zone G zone
S-HIGH2 — 1,120 — — — —
S-HIGH1 990 1,120 — — — —
HIGH1 990 1,120 — — — —
10 — 1,120 — — — —
9 990 1,120 990 390 320 240
8 940 1,120 940 390 320 240
7 940 940 940 390 320 240
6 940 780 940 300 240 200
5 890 690 890 250 240 200
4 790 630 790 250 240 200
3 710 570 710 250 240 200
2 660 570 660 250 240 200
1 620 570 620 250 240 200
NOTE: After defrost control on the heating mode, the fan speed is kept higher regardless of the
compressor frequency.
Fan speed after defrost control: 1,120 rpm
CONTROL AND
FUNCTIONS
3-2. Outdoor fan control - (04-12) - 3. Fan control
Page 91
4. Louver control
1
2
3
4
5
Side view
1 2 3 4 5 6
6
Horizontal louver
Knob
4-1. Vertical airflow direction louver control
CONTROL AND
FUNCTIONS
Each time the button is pressed, the air direction range will change as below:
• Remote controller display is not changed.
• Vertical airflow direction is set automatically as shown, in accordance with the type of operation
selected.
Cooling / Dry mode : Horizontal flow 1
Heating mode : Downward flow 6
• During AUTO operation, for the first a few minutes after beginning operation, airflow will be horizontal 1; the air direction cannot be adjusted during this period.
The airflow direction setting will temporarily become 1 when the temperature of the airflow is low at
the start of the Heating mode.
• After beginning of AUTO/HEAT mode operated and automatic defrosting operation, the airflow will
be horizontal 1. However, the airflow direction cannot be adjusted at beginning AUTO operation
mode.
CONTROL AND
FUNCTIONS
4-2. Adjust the horizontal louver
Move the horizontal louvers to adjust airflow direction you prefer.
4-3. Swing operation
• To select vertical airflow swing operation
When the swing signal is received, the vertical airflow direction louver starts to swing.
– Swinging range
• Cooling mode/dry mode/fan mode (1 to 3): 1 ↔ 4
• Heating mode/fan mode (4 to 6): 3 ↔ 6
– When the indoor fan is S-LOW or stop mode, the swing operation is interrupted and it stops at
either upper end or bottom end.
• To select horizontal airflow swing operation
No function
4-1. Vertical airflow direction louver control
- (04-13) - 4. Louver control
Page 92
5. Timer operation control
Operation mode
Stop mode
Set time of timer
Operation mode
Stop mode
Set time of timer
Operation mode
Stop mode
Stop mode
Stop mode
Operation mode
Operation mode
Set time Set time Set time Set time
5-1. Wireless remote control
¢ On/Off timer
CONTROL AND
FUNCTIONS
On/Off timer Program timer Sleep timer Weekly timer
○ ○ ○ ○
• Off timer: When the clock reaches the set timer, the air conditioner will be turned off.
• On timer: When the clock reaches the set timer, the air conditioner will be turned on.
CONTROL AND
FUNCTIONS
¢ Program timer
• The program timer allows the off timer and the on timer to be used in combination one time.
• Operation will start from the timer setting (either off timer and on timer) whichever is closest to
the clock current timer setting. The order of operations is indicated by the allow in the remote
controller screen.
• Sleep timer operation cannot be combined with on timer operation.
5-1. Wireless remote control
- (04-14) - 5. Timer operation control
Page 93
¢ Sleep timer
Set temperature rises
Ts: Set temperature
Stop of operation
Ts
+2°C
Set 60 min
+1°C
Set
Ts
-2°C
-1°C
-3°C
-4°C
Ts: Set temperature
30 min 30 min
30 min
Stop of operation
Set temperature rises
CONTROL AND
FUNCTIONS
If the sleep timer is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the
operation is continued according to the changed setting of the sleep timer from that time on.
• In the cooling operation mode
When the sleep timer is set, the setting temperature is increased 1°C. It increases the setting
temperature another 1°C after 1 hour. After that, the setting temperature is not changed and
the operation is stopped at the setting time.
• In the heating operation mode
When the sleep timer is set, the setting temperature is decreased 1°C. It decreases the setting
temperature another 1°C every 30 minutes. Upon lowering 4°C, the setting temperature is not
changed and the operation is stopped at the setting time.
CONTROL AND
FUNCTIONS
¢ Weekly timer
On and off timer can be combined, and up to 4 reservations per day and 28 reservations per
week. Before setting the program, set the week and time of the air conditioner at first. If the week
and time are not set, the weekly timer will not operate correctly at the setting time.
5-1. Wireless remote control
- (04-15) - 5. Timer operation control
Page 94
5-2. Wired remote control
Operation mode
Stop mode
Set time of timer
Operation mode
Stop mode
Set time of timer
Operation mode
Stop mode
Stop mode
Stop mode
Operation mode
Operation mode
Set time Set time Set time Set time
¢ On/Off timer
CONTROL AND
FUNCTIONS
On/Off timer Program timer Sleep timer Weekly timer
Temperature set
back timer
○ ○ ○ ○ ○
• Off timer: When the clock reaches the set timer, the air conditioner will be turned off.
• On timer: When the clock reaches the set timer, the air conditioner will be turned on.
CONTROL AND
FUNCTIONS
¢ Program timer
• The program timer allows the off timer and the on timer to be used in combination one time.
• Operation will start from the timer setting (either off timer and on timer) whichever is closest to
the clock current timer setting. The order of operations is indicated by the allow in the remote
controller screen.
• Sleep timer operation cannot be combined with on timer operation.
5-2. Wired remote control - (04-16) - 5. Timer operation control
Page 95
¢ Sleep timer
Set temperature rises
Ts: Set temperature
Stop of operation
Ts
+2°C
Set 60 min
+1°C
Set
Ts
-2°C
-1°C
-3°C
-4°C
Ts: Set temperature
30 min 30 min
30 min
Stop of operation
Set temperature rises
CONTROL AND
FUNCTIONS
If the sleep timer is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the
operation is continued according to the changed setting of the sleep timer from that time on.
• In the cooling operation mode
When the sleep timer is set, the setting temperature is increased 1°C. It increases the setting
temperature another 1°C after 1 hour. After that, the setting temperature is not changed and
the operation is stopped at the setting time.
• In the heating operation mode
When the sleep timer is set, the setting temperature is decreased 1°C. It decreases the setting
temperature another 1°C every 30 minutes. Upon lowering 4°C, the setting temperature is not
changed and the operation is stopped at the setting time.
CONTROL AND
FUNCTIONS
¢ Weekly timer
On and off timer can be combined, and up to 4 reservations per day and 28 reservations per
week. Before setting the program, set the week and time of the air conditioner at first. If the week
and time are not set, the weekly timer will not operate correctly at the setting time.
5-2. Wired remote control
- (04-17) - 5. Timer operation control
Page 96
¢ Temperature set back timer
SET BACK setting
Operation
temperature
Operation
temperature
26°C
22°C
26°C
22°C
24°C
*1
ON OFF OFFON
*1: During the SET BACK function,
the setting temperature is changed.
Chenge the setting temperature:
22°C 24°C
CONTROL AND
FUNCTIONS
• The SET BACK timer only changes the set temperature for 7 days, it cannot be used to start
or stop air conditioner operation.
• The SET BACK timer can be set to operate up to two times per day but only one temperature
setting can be used.
• During COOLING/DRY mode, the air conditioner will operate at a minimum of 18°C even if the
SET BACK temperature is set to 17°C or lower.
Case of SET BACK timer on the Cooling operation. (Setting temperature :22°C, SET BACK
temperature :26°C)
CONTROL AND
FUNCTIONS
5-2. Wired remote control - (04-18) - 5. Timer operation control
Page 97
6. Defrost operation control
Tn: Outdoor unit heat exchanger temperature
Ta: Outdoor temperature
Tn10: Temperature at 10 minutes after compressor start
Tnb: Temperature before 5 minutes
• Triggering condition
The defrost operation starts when outdoor unit heat exchanger temperature sensor detects the
temperature lower than the values shown below.
– 1st time defrosting after starting operation
CONTROL AND
FUNCTIONS
Compressor integrating
operation time
Condition Does not operate
Less than 17 min. 17 to 57 min. More than 57 min.
Tn ≤ -9°C and Tn-Ta ≥ 5
deg
Tn ≤ -5°C
– 2nd time and after
Compressor integrating
operation time
Condition Does not operate
Less than 40 min. More than 40 min.
Tn-Tn10 < -5 deg (Tn ≤ -6°C )
Tn-Tnb < -2 deg (Tn ≤ -6°C )
Tn ≤ -17°C (Ta ≥ -10°C)
Tn ≤ -7°C or Tn ≤ -20°C (Ta < -10°C)
– Integrating defrost (Constant monitoring)
Compressor integrating
operation time
Condition Tn ≤ -3°C Tn ≤ -5°C
More than 240 min. (For
long continuous
operation)
More than 213 min. (For
long continuous
operation
Less than 10 min.* (For
intermittent operation)
Count of the compressor
off: 40 times
*: If the compressor continuous operation time is less than 10 minutes, the number of the compressor off is counted. If any defrost operated, the compressor off count is cleared.
CONTROL AND
FUNCTIONS
• Release condition
The defrost operation is released when either one of the conditions below is satisfied.
Outdoor unit heat exchanger temperature
(after 1 minute or later since compressor start)
Compressor operation time 15 minutes
- (04-19) - 6. Defrost operation control
16°C or more
Page 98
6-1. Defrost operation in heating operation stopped
If the outdoor unit is frosted when stopping the heating operation, it stops after performing the automatic defrosting operation.
In this time, if the indoor unit operation lamp flashes slowly (6 sec on/2 sec off), the outdoor unit allow the heat exchanger to defrost, and then stop.
• Triggering condition
When all of the following conditions are satisfied in heating operation
– Compressor operation integrating time: 30 minutes or more
– Compressor continuous operation time: 10 minutes or more
– Outdoor unit heat exchanger temperature: -4°C or less
• Release condition
The defrost operation is released when either one of the conditions below is satisfied.
CONTROL AND
FUNCTIONS
Outdoor unit heat exchanger temperature
(after 1 minute or later since compressor start)
Compressor operation time 15 minutes
16°C or more
CONTROL AND
FUNCTIONS
6-1. Defrost operation in heating operation stopped - (04-20) - 6. Defrost operation control
Page 99
7. Various control
7-1. Auto restart
CONTROL AND
FUNCTIONS
When the power was interrupted by a power failure etc. during operation, the operation contents at
that time are memorized and when the power is recovered, operation is automatically started with
the memorized operation contents.
Operation contents memorized when the power is interrupted
Operation mode
Setting temperature
Fan mode setting
Timer mode and set time (set by wireless remote controller)
Airflow direction setting
Swing
ECONOMY operation
10 °C HEAT operation
Outdoor low noise operation
Remote control setting
WLAN LED setting
CONTROL AND
FUNCTIONS
7-2. MANUAL AUTO operation
When the wireless remote controller is lost or battery power dissipated, this function will work without
the remote controller.
When MANUAL AUTO button is pressed more than 3 seconds and less than 10 seconds, MANUAL
AUTO operation starts as shown in the table below. To stop operation, press the MANUAL AUTO
button for 3 seconds.
Operation mode Auto changeover
Fan mode AUTO
Timer mode Continuous (no timer setting available)
Setting temperature 24°C
Vertical airflow direction louver setting Standard
SWING Off
ECONOMY Off
Human sensor Off
7-1. Auto restart - (04-21) - 7. Various control
Page 100
7-3. Forced cooling operation
CONTROL AND
FUNCTIONS
The outdoor unit may not operate depending on the room temperature.
When FORCED COOLING OPERATION button is pressed more than 10 seconds, forced cooling
operation starts as shown in the table below.
Operation mode Cooling
Fan mode HIGH
Timer mode Continuous (no timer setting available)
Setting temperature 24°C
Vertical airflow direction louver setting Standard
SWING Off
ECONOMY Off
Human sensor Off
• During the forced cooling operation, it operates regardless of room temperature sensor.
• Operation LED and timer LED blink at the same time during the forced cooling operation.
They blink for 1 second ON and 1 second OFF on both operation LED and timer LED (same as
test operation).
By performing one of the following action, test operation will be canceled:
• Pressing the remote controller START/STOP button
• Pressing FORCED COOLING OPERATION button for 3 seconds
• 60 minutes passed after starting forced cooling operation
CONTROL AND
FUNCTIONS
NOTE: When HEAT operation is selected on the remote controller during forced cooling operation,
heating test run will begin in about 3 minutes.
7-4. 10 °C HEAT operation
10 °C HEAT operation performs as below setting when pressing 10 °C HEAT button.
Operation mode Heating
Setting temperature 10°C
Fan mode AUTO
LED display Economy
Defrost operation Operate as normal
7-3. Forced cooling operation - (04-22) - 7. Various control
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