Fujitsu 12LZAS1 Service Manual

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Page 1

AIR CONDITIONER

Wall mounted type

SERVICE MANUAL

INDOOR

OUTDOOR

ASUG09LZAS ASUG12LZAS ASUG15LZAS

AOUG09LZAH1 AOUG12LZAH1 AOUG15LZAH1

SR_AS025EF_04

2020.02.26

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.

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_AS025EF_02

2020.01.28

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 ASUG09LZAS ASUG12LZAS ASUG15LZAS

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 33.1 29.4 25.3 HSPF Heating Btu/hW 14.0 13.8 13.3

Power factor

Moisture removal pints/h (L/h) 2.5 (1.2) 2.7 (1.3) 4.0 (1.9)

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 3.3 4.7 5.2

Cooling Heating 87 93 96

Cooling

Heating 11.9 11.9 14.4

Cooling

Airflow rate

Heating

Type × Q'ty Crossflow fan × 1 Motor output W 59

Cooling

Heating

Dimensions (H × W × D) in (mm)

Fin pitch FPI

Rows × Stages

Pipe type Copper Fin type Aluminum Material Polystyrene

Color

Net Gross 12-11/16 × 42-7/16 × 13-5/8 (322 × 1,078 × 346) Net Gross 37 (17)

Size

Method Flare Material PP+LLDPE Tip diameter in (mm) Ø17/32 (Ø 13.8) (I.D.), Ø5/8 to 21/32 (Ø 15.8 to 16.7) (O.D.)

Cooling

Heating °F (°C) 60 to 86 (16 to 30)

Rated

Min.—Max.

Rated

Min.—Max.

Rated

Max.

Rated Min.—Max. 0.11—0.85 0.11—0.99 0.15—1.56 Rated 0.66 1.01 1.15 Min.—Max. 0.17—1.93 0.17—1.94 0.15—2.19 Rated 0.62 0.91 1.04

Max. 2.21 2.21 2.74

Rated A

HIGH MED 406 (690) 406 (690) 459 (780) LOW 312 (530) 312 (530) 312 (530) QUIET 206 (350) 206 (350) 241 (410) HIGH 542 (920) 542 (920) 600 (1,020) MED 406 (690) 406 (690) 459 (780) LOW 312 (530) 312 (530) 312 (530) QUIET 206 (350) 206 (350) 241 (410)

HIGH MED 37 37 40 LOW 31 31 32 QUIET 23 23 26 HIGH 43 43 45 MED 36 36 39 LOW 31 31 32 QUIET 23 23 26

Liquid Gas Ø 3/8 (Ø 9.52) Ø 1/2 (Ø 12.7)

kW 2.64 3.52 4.25

Btu/h 9,000 12,000 14,500

kW 0.91—3.52 0.91—3.99 0.91—5.39

Btu/h 3,100—12,000 3,100—13,600 3,100—18,400

kW 3.52 4.69 5.28

Btu/h 12,000 16,000 18,000

kW 0.91—6.45 0.91—6.48 0.91—7.00

Btu/h 3,100—22,000 3,100—22,100 3,100—23,900

kW 2.17 2.93 3.28

Btu/h 7,400 10,000 11,200

kW 4.69 5.13 6.30

Btu/h 16,000 17,500 21,500

kW/kW 5.28 4.46 4.09 Btu/hW 18.0 15.2 13.9 kW/kW 5.33 4.64 4.59 Btu/hW 18.2 15.8 15.7

CFM (m3/h)

dB (A)

in (mm)

lb (kg)

in (mm)

°F (°C) 64 to 90 (18 to 32)

%RH 80 or less

0.50 0.79 1.04

2.5 3.8 4.8

87 90 94

9.4 9.4 9.9

542 (920) 542 (920) 583 (990)

43 43 45

Main1: 8-1/4 × 31-7/16 × 1-1/16 (210 × 798 × 26.6)

Main2: 5-5/16 × 31-7/16 × 13/16 (135 × 798 × 20.0)

Sub1: 3-5/16 × 31-7/16 × 1/2 (84 × 798 × 13.3) Sub2: 3-5/16 × 31-7/16 × 1/2 (84 × 798 × 13.3)

Approximate color of Munsell N 9.25/

11 × 38-9/16 × 9-7/16 (280 × 980 × 240)

Wireless (Wired, Mobile app*4 [FGLair™] [option])

Man1: 21

Main2: 23

Sub1: 18 Sub2: 18

Main1: 2 × 10

Main2: 2 × 8

Sub1: 1 × 4 Sub2: 1 × 4

White

29 (13)

Ø 1/4 (6.35)

GENERAL

INFORMATION

1-1. Indoor unit - (01-1) - 1. Specifications

Page 8

Type

Model name ASUG09LZAS ASUG12LZAS ASUG15LZAS

NOTES:

GENERAL

INFORMATION

Wall mounted

Inverter heat pump

• 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) /59 °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 AOUG09LZAH1 AOUG12LZAH1 AOUG15LZAH1

Power supply 208/230 V ~ 60 Hz Available voltage range 187—253 V Starting current A 3.3 4.7 5.2

Fan

Sound pressure level *1

Heat exchanger type

Compressor

Refrigerant

Refrigerant oil

Enclosure

Dimensions (H × W × D)

Weight

Connection pipe

Operation range

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) / 59 °FWB (15 °CWB), and outdoor temperature of 47 °FDB (8.33 °CDB) / 43 °FWB (6.11 °CWB). – Pipe length: 24 ft 6 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)

• Protective function might work when using it outside the operation range.

• *1: Sound pressure level – Measured values in manufacturer’s anechoic chamber. – Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.

Airflow rate

Type × Q'ty Propeller fan × 1 Motor output W 49

Type DC rotary Motor output W 900 1,030

Net Gross 27-1/4 × 37 × 14-3/4 (692 × 940 × 375) Net Gross 95 (43)

Size

Method Flare Pre-charge length Max. length 66 (20) Max. height difference 49 (15)

Cooling Heating 1,089 (1,850) 1,089 (1,850) 1,348 (2,290)

Cooling Heating 47 47 50 Dimensions (H × W × D) Fin pitch FPI 20

Rows × Stages

Pipe type Copper

Fin type

Type R410A

Charge

Type RB68 Amount Material Steel sheet

Color

Liquid Gas Ø 3/8 (Ø 9.52) Ø 1/2 (Ø 12.7)

Cooling Heating -15 to 75 (-26 to 24)

CFM (m3/h)

dB (A)

in (mm)

Type (Material) Aluminum Surface treatment PC fin

lb oz 2 lb 14 oz 2 lb 16 oz

g 1,300 1,350

in3 (cm3)

in (mm)

lb (kg)

in (mm)

ft (m)

°F (°C)

1,089 (1,850) 1,171 (1,990) 1,218 (2,070)

46 47 49

Main1: 23-1/8 × 34-11/16 × 11/16 (588 × 881 × 18.19)

Main2: 23-1/8 ×33-1/2 × 11/16 (588 × 851 × 18.19)

Main1: 1 × 28 Main2: 1 × 28

24.4 (400)

Beige

Approximate color of Munsell 10YR 7.5/1.0

24-7/8 × 31-7/16 × 11-7/16 (632 × 799 × 290)

86 (39) 88 (40)

Ø 1/4 (Ø 6.35)

49 (15)

14 to 115 (-10 to 46)

GENERAL

INFORMATION

1-2. Outdoor unit

- (01-3) - 1. Specifications

Page 10

2. Dimensions

Unit: in (mm)

38-9/16 (980) 9-7/16 (240)

11 (280)

Outline of indoor unit

1-7/16 (37)

15-3/4 (400) 3-9/16

(90)

16-1/4 (413)3-1/16

(77)

2-7/8

(73)

16-7/16 (417)2-3/8

(61)

16-7/8 (429)

4-1/2 (115)

2-13/16 (72)

for pipe inlet Ø 2-9/16 (65)

GENERAL

2-1. Indoor unit

INFORMATION

¢ Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

GENERAL

INFORMATION

2-1. Indoor unit - (01-4) - 2. Dimensions

Page 11

Unit: in (mm)

Wall hook bracket

Outline of the indoor unit

2 (50) or more

3 (71) or more

2(40) or more

3 (70) or more

5 (117) or more

60 (1,500) or more

71 (1,800) or more

7 (160) or more

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

Side viewSide view

Front view

Top view

22-13/16 (580)

31-7/16 (799)3/4 (19) 2-11/16 (68) 1/2 (13) 11-7/16 (290)

1-5/16 (33) 1-3/16 (30)

4-5/16 (109)

13-7/8 (353)

24-7/8 (632)

13/16 (20)

13 (330)

Pitch of bolts

for installation

Pitch of bolts for installation

0 hole

Unit: in (mm)

Side view (Valve part)

4-3/4 (120)

4-1/4 (184)

7-1/16 (180)

Bottom view

Airflow

Drain port Ø1-5/8 (42)

1-7/16 (37)

15-11/16 (399)

Hole

GENERAL

INFORMATION

Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

GENERAL

INFORMATION

2-2. Outdoor unit - (01-6) - 2. Dimensions

Page 13

2. TECHNICAL DATA AND PARTS LIST

SR_CH02_AS025EF_02

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: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS..........................................02-2

3. Outdoor unit parts list.................................................................................02-6

3-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 ..................................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: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1................................02-13

7. Wiring diagrams ........................................................................................02-14

7-1. Indoor unit ....................................................................................................................02-14

7-2. Outdoor unit..................................................................................................................02-14

8. PC board diagrams ...................................................................................02-15

8-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS........................................02-15

8-2. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1................................02-16

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

19 20

2-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

¢ Exterior parts and Accessories

TECHNICAL DATA

AND PARTS LIST

TECHNICAL DATA

AND PARTS LIST

2-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS - (02-2) - 2. Indoor unit parts list

Page 17

TECHNICAL DATA

AND PARTS LIST

Item no. Part no. Part name Service part

1 9323351004 Bracket panel ♦ 2 9387476002 Screw cap ♦ 3 9313951047 Conduit holder ♦ 4 9387597035 Wire cover assy ♦ 5 9383765032 Wifi holder assy ♦ 6 9383634017 Wireless LAN adapter ♦ 7 9387479010 U/D louver assy ♦ 8 9332911008 Electric filter holder ♦

9 9323341005 Under cover L ♦ 10 9317250009 Air clean filter assy ♦ 11 9332438765 Remote controller ♦ 12 9318912005 Remote controller holder ♦ 13 9387596441 Front panel total assy ♦ 14 9387756210 Intake grille assy ♦ 15 9323340008 Air filter ♦ 16 9333719009 Grille clamper L ♦ 17 9333704005 Grille clamper R ♦ 18 9323342002 Under cover R ♦ 19 9383730023 Louver spring ♦ 20 9333608006 Bush ♦

a — Front panel —

b — Panel cover —

c — Front panel cover —

d — Front panel B —

TECHNICAL DATA

AND PARTS LIST

2-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS - (02-3) - 2. Indoor unit parts list

Page 18

¢ Chassis

TECHNICAL DATA

AND PARTS LIST

TECHNICAL DATA

AND PARTS LIST

2-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS - (02-4) - 2. Indoor unit parts list

Page 19

TECHNICAL DATA

AND PARTS LIST

Item no. Part no. Part name Service part

9383735042 Evaporator total assy (for 09-12 model) ♦

9383735059 Evaporator total assy (for 15 model) ♦ 51 9387467000 Room thermistor holder ♦ 52 9306489045 Terminal ♦

9711141392 Main PCB (for 09 model) ♦ 53

9711141408 Main PCB (for 12 model) ♦

9711141415 Main PCB (for 15 model) ♦ 54 9900627041 Thermistor assy ♦ 55 9711146014 Display assy ♦ 56 9317755061 Pyroelectric sensor ♦ 57 9387589023 Motor case assy ♦ 58 9603821005 Brushless motor ♦ 59 9383565007 Pipe bracket ♦ 60 9387488043 Cable guide ♦ 61 9387714012 Gear case assy ♦ 62 9383728006 R and L louver SPM assy ♦ 63 9387590036 Drain pan total assy ♦ 64 9316904002 Drain hose assy ♦ 65 9316177017 Drain cap ♦ 66 9387591019 Drain pan assy ♦ 67 9383727009 Spacer K assy ♦ 68 9333628004 Bearing D assy ♦ 69 9387055054 Crossflow fan assy ♦ 70 9387587029 Base assy ♦

a — Control box — b — Control cover — c — Display case — d — Motor case — e — Motor cover assy —

TECHNICAL DATA

AND PARTS LIST

2-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS - (02-5) - 2. Indoor unit parts list

Page 20

3. Outdoor unit parts list

3-1. Models: AOUG09LZAH1, AOUG12LZAH1, and

¢ Exterior parts and chassis

TECHNICAL DATA

AND PARTS LIST

AOUG15LZAH1

TECHNICAL DATA

AND PARTS LIST

3-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (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 9377854001 Protective net assy ♦ 3 9322327000 Thermistor holder ♦ 4 9322552242 Cabinet right assy ♦ 5 9384276001 Conduit cover ♦ 6 9322570062 Switch cover assy ♦ 7 9901059025 Heater base ♦ 8 9323540019 Heater holder A ♦

9 9323541016 Heater holder B ♦ 10 9383720000 Drain cap assy ♦ 11 9323550025 Base assy ♦ 12 9322144003 Drain pipe ♦

9709684009 Main PCB (for 09 model) ♦

9709684016 Main PCB (for 12 model) ♦

9709684023 Main PCB (for 15 model) ♦ 14 9900935054 Thermistor assy ♦ 15 9900985011 Thermistor assy (Compressor temp.) ♦ 16 9900565060 Thermistor assy (Outdoor temp.) ♦ 17 9322420039 Heat sink ♦ 18 9810028006 Thermistor stopper ♦ 19 9317903011 Emblem ♦ 20 9384273000 Fan Guard ♦ 21 9322555182 Front panel assy ♦ 22 9322150004 Propeller fan ♦ 23 9603601003 Brushless motor ♦ 24 9322553027 Motor bracket assy ♦

9317089616 Condenser total assy (for 09-12 model) ♦

9317089654 Condenser total assy (for 15 model) ♦

a — Inverter assy — b — Hair pin cushion —

TECHNICAL DATA

AND PARTS LIST

3-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (02-7) - 3. Outdoor unit parts list

Page 22

¢ Compressor

5758596061

TECHNICAL DATA

AND PARTS LIST

TECHNICAL DATA

AND PARTS LIST

3-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (02-8) - 3. Outdoor unit parts list

Page 23

TECHNICAL DATA

AND PARTS LIST

Item no. Part no. Part name Service part

9810542007 Compressor (for 09-12 model) ♦

9810541000 Compressor (for 15 model) ♦ 51 9322446015 4-way valve assy ♦ 52 9970194023 Solenoid ♦ 53 9970173028 Expansion valve coil ♦ 54 9322463029 Pulse motor valve assy ♦ 55 9322474001 2-way valve assy ♦

9322850010 3-way valve assy (for 09-12 model) ♦

9387831016 3-way valve assy (for 15 model) ♦ 57 9322824004 S-insulator K ♦ 58 9323045002 S-insulator V ♦ 59 9322501004 S-insulator H ♦ 60 9322847003 S-insulator F ♦ 61 9322503008 S-insulator B ♦

a — Valve bracket — b — Muffler —

TECHNICAL DATA

AND PARTS LIST

3-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (02-9) - 3. Outdoor unit parts list

Page 24

4. Accessories

4-1. Indoor unit

Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

TECHNICAL DATA

4-2. Outdoor unit

AND PARTS LIST

Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

Installation manual 1 Cable tie 2

Part name Exterior Q’ty Part name Exterior Q’ty

TECHNICAL DATA

AND PARTS LIST

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

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

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.

5-1. Indoor unit

- (02-11) - 5. Optional parts

Page 26

Others

Exterior Part name Model name Summary

TECHNICAL DATA

AND PARTS LIST

External

connect kit

External input

and output PCB

Communication

kit

Wireless LAN

adapter

UTY-XWZXZ5

UTY-XCSXZ2

UTY-TWRXZ2

UTY-TFSXF3

Required when external device is connected.

Use to connect with external devices and air conditioner PCB. Optional External connect kit is necessary for installation.

Use to connect Non-polar 2-core wired remote controller.

Remotely manage an air conditioning system using mobile devices such as smartphones and tablets.

TECHNICAL DATA

AND PARTS LIST

5-1. Indoor unit - (02-12) - 5. Optional parts

Page 27

6. Refrigerant system diagrams

Strainer

3-way

valve

2-way

valve

Muffler

4-way valve

Expansion valve

Heat exchanger

(INDOOR)

(OUTDOOR)

Compressor

Cooling

Heating

Muffler

Accumulator

: Thermistor (Discharge temperature)

: Thermistor (Outdoor temperature)

: Thermistor (Heat exchanger out temperature)

: Thermistor (Compressor temperature)

: Thermistor (Room temperature)

: Thermistor (Pipe temperature)

6-1. Models: AOUG09LZAH1, AOUG12LZAH1, and

TECHNICAL DATA

AND PARTS LIST

AOUG15LZAH1

TECHNICAL DATA

AND PARTS LIST

6-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (02-13) - 6. Refrigerant system diagrams

Page 28

7. Wiring diagrams

7-1. Indoor unit

Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

TECHNICAL DATA

7-2. Outdoor unit

AND PARTS LIST

Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

TECHNICAL DATA

AND PARTS LIST

7-1. Indoor unit - (02-14) - 7. Wiring diagrams

Page 29

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

RED

ORANGE YELLOW PINK BLUE

BLACK

BLACK BLACK BLACK

BLACK

UL1061 AWG26 WHITE

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

( 1 RED )

( 2 WHITE )

( 3 GREEN )

( 4 BLACK )

3.15A

AC250V

EARTH

SERIAL

CN9 B10B-PASK-1

WHITE

CN5 B5 ( 7-2.3 ) B-XASK-1-A

WHITE

CN7 B05B-PLISK-1

WHITE

CN8 B06B-PLIRK-1

RED

CN200

S10B-PASK-2

WHITE

CN4

B12B-PASK-1

WHITE

CN6

B04B-PASK-1

WHITE

CN10

B03B-PLISK-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

CN1 B03B-PLISK-1

WHITE

J2 USB5-A4M2-KNSO-01

WHITE

LOUVER UP / DOWN

LOUVER RIGHT / LEFT

DC FAN MOTOR FM

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 )

WIRELESS LAN ADAPTER

AP-WF1E

PYROELECTRIC SENSOR

( HUMAN SENSOR )

FJZ-10

TEST

INDICATOR PCB

K18RB-1800HSE-D0

OUTDOOR UNIT ( POWER SOURCE )

MAIN PCB ASUG09LZAS : K18RA-1902HSE-C1 ASUG12LZAS : K18RA-1903HSE-C1 ASUG15LZAS : K18RA-1904HSE-C1

CONTROL UNIT ASUG09LZAS : EZ-0190EHSE ASUG12LZAS : EZ-0190FHSE ASUG15LZAS : EZ-0190GHSE

DC340V

DC15V

DC12V

DC5V

DC12V

DC5V-2

DC12V-3

DC12V

DC5V

DC5V-2

DC5V

CN5 DC Fan motor

Pin No.

Terminal code

GND

Vcc

Vsp

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

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 )

8-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

TECHNICAL DATA

AND PARTS LIST

TECHNICAL DATA

AND PARTS LIST

8-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS - (02-15) - 8. PC board diagrams

Page 30

8-2. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

W103

W104

W70

W100

W101

W102

W400

B U

W401

B V

W402

UL3271 AWG16

RED

UL3271 AWG16

WHITE

UL3271 AWG16

BLACK

RED

BLACK

WHITE

BLUE

RED

BLACK

WHITE

YELLOW

RROWN

RED

BLUE

ORANGE

YELLOW

WHITE

BLACK

UL1015 AWG20

BLACK

UL1015 AWG20

WHITE

UL1015 AWG20

RED

UL1015 AWG14

BLACK

UL1015 AWG14

WHITE

UL1015 AWG16

GREEN

BLACK

P1 B04B-PLIRK-1

RED

P5 B03B-PLISK-1

WHITE

P15 B03B-PASK-1

WHITE

P60

B2P3-VH-B

WHITE

P650

B5 ( 7-2.3 ) B-XASK-1-A

WHITE

P30

B05B-PLISK-1

WHITE

P50

B2P ( 4-2.4 ) -VH-B-C

BLACK

P600

B12B-PASK-1

WHITE

TRCB-25-15-12

7 TURNS

WIRE w/TERMINAL ( CORE ) 1015#

GREEN

TERMINAL

HP-T3036B-2-6P-A1

FRAME

SLR-03VF

SERIAL

TO INDOOR UNIT

POWER SOURCE AC208/230V 60Hz

EARTH

THERMISTOR ( PIPE TEMP. )

THERMISTOR ( DISCHARGE TEMP. )

THERMISTOR ( OUTDOOR TEMP. )

THERMISTOR ( COMPRESSOR TEMP. )

TEST

BASE HEATER AC230V 150W

EXPANSION VALVE COIL

DC FAN MOTOR

COMPRESSOR

4-WAY VALVE COIL

DC Resistance 1970

(20 )

U-V

V-W

U-W

Winding Resistance

1.916

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

Pin No.

Terminal code

GND

Vcc

Vsp

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

P650 DC Fan Motor

AC208/230V ( ON )

DC5V

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

Thermistor ( Compressor temp. )

168.60 k

62.55 k

40.01 k

0.36 V

0.86 V 1.23 V

( 20 )

(20 )

P1 Thermistor Characteristics.

Thermistor

Temperature

( 20 ) ( 30 )

( 0 )

P5 Thermistor Characteristics.

Thermistor

Temperature

( 20 ) ( 30 )

( 0 )

P15 Thermistor Characteristics.

Thermistor

Temperature

( 20 ) ( 30 )

( 0 )

DC15V-1

DC5V

DC12VDC12V

DC340V

MAIN PCB AOUG09LZAS1: K16JG-190CHUE-C1 AOUG12LZAS1: K16JG-190DHUE-C1

AOUG15LZAS1 : K16JG-190GHUE-C1

AOUG09LZAH1: K16JG-190EHUE-C1 AOUG12LZAH1: K16JG-190FHUE-C1 AOUG15LZAH1: K16JG-190HHUE-C1

*AOUG09LZAH1, 12LZAH1 and 15LZAH1 only.

INVERTER ASSEMBLY

AOUG09LZAS1 : EZ-0190MHUE

AOUG12LZAS1 : EZ-0190PHUE AOUG15LZAS1 : EZ-0190THUE

AOUG09LZAH1 : EZ-0190RHUE AOUG12LZAH1 : EZ-0190SHUE AOUG15LZAH1 : EZ-0190WHUE

EMI FILTER

KRFC-13

2 TURNS

EMI FILTER

KRFC-13

1 TURN

EMI FILTER

KRFC-13

2 TURNS

TECHNICAL DATA

AND PARTS LIST

TECHNICAL DATA

AND PARTS LIST

8-2. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (02-16) - 8. PC board diagrams

Page 31

3. TROUBLESHOOTING

SR_CH03_AS025EF_02

2020.01.30

Page 32

CONTENTS

3. TROUBLESHOOTING

1. Error code ....................................................................................................03-1

1-1. Error code table (Indoor unit and wired remote controller)..............................................03-1

1-2. Error code table (Wireless LAN indicator).......................................................................03-2

1-3. Error code table (Mobile app) .........................................................................................03-3

1-4. Error message for wireless LAN control (Mobile app).....................................................03-5

2. Troubleshooting with error code ...............................................................03-9

2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit).............03-9

2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) .............03-11

2-3. E: 12. Wired remote controller communication error (Indoor unit) ................................03-13

2-4. E: 18. External communication error (Indoor unit) ........................................................03-14

2-5. E: 32. Indoor unit main PCB error (Indoor unit) ............................................................03-15

2-6. E: 35. MANUAL AUTO button error (Indoor unit)..........................................................03-16

2-7. E: 41. Room temperature sensor error (Indoor unit).....................................................03-17

2-8. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) ........................................03-18

2-9. E: 51. Indoor unit fan motor error (Indoor unit) .............................................................03-19

2-10. E: 58. Intake grille error (Indoor unit) ..........................................................................03-20

2-11. E: 62. Outdoor unit main PCB error (Outdoor unit).....................................................03-21

2-12. E: 63. Inverter error (Outdoor unit)..............................................................................03-22

2-13. E: 64. PFC circuit error (Outdoor unit) ........................................................................03-23

2-14. E: 71. Discharge thermistor error (Outdoor unit).........................................................03-24

2-15. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit)............................03-25

2-16. E: 74. Outdoor temperature thermistor error (Outdoor unit)........................................03-26

2-17. E: 84. Current sensor error (Outdoor unit) ..................................................................03-27

2-18. E: 94. Trip detection (Outdoor unit).............................................................................03-28

2-19. E: 95. Compressor motor control error (Outdoor unit) ................................................03-29

2-20. E: 97. Outdoor unit fan motor error (Outdoor unit)......................................................03-30

2-21. E: 99. 4-way valve error (Outdoor unit).......................................................................03-32

2-22. E: A1. Discharge temperature error (Outdoor unit).....................................................03-34

3. Troubleshooting without error code........................................................03-36

3-1. Indoor unit—No power..................................................................................................03-36

3-2. Outdoor unit—No power...............................................................................................03-37

3-3. No operation (Power is on)...........................................................................................03-38

3-4. No cooling/No heating ..................................................................................................03-39

3-5. Abnormal noise.............................................................................................................03-41

3-6. Water leaking................................................................................................................03-42

3-7. Too warm .....................................................................................................................03-43

3-8. Too cool........................................................................................................................03-47

4. Troubleshooting with error code (For wireless LAN adapter)...............03-51

4-1. E: 18. External communication error between indoor unit and WLAN adapter .............03-51

4-2. Wireless LAN adapter error ..........................................................................................03-52

4-3. Network communication error between wireless LAN router and WLAN adapter.........03-53

Page 33

CONTENTS (continued)

4-4. E: 18. Communication error..........................................................................................03-55

4-5. E: 18. Wireless LAN adapter non-energized.................................................................03-57

4-6. Wireless LAN adapter Sleep mode (Indoor unit) ..........................................................03-58

4-7. Mobile app setting method............................................................................................03-59

5. Service parts information .........................................................................03-64

5-1. Compressor..................................................................................................................03-64

5-2. Inverter compressor......................................................................................................03-65

5-3. Outdoor unit Electronic Expansion Valve (EEV) ...........................................................03-66

5-4. Indoor unit fan motor ....................................................................................................03-68

5-5. Outdoor unit fan motor..................................................................................................03-69

6. Thermistor resistance values...................................................................03-70

6-1. Indoor unit ....................................................................................................................03-70

6-2. Outdoor unit..................................................................................................................03-71

Page 34

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: 18. External communication error between indoor unit and WLAN adapter

E: 18. Communication error 1 times 8 times Continuous 18 E: 18. Wireless LAN adapter non-energized 1 times 8 times Continuous 18 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: 58. Intake grille error (Indoor unit) 5 times 8 times Continuous 58 E: 62. Outdoor unit main PCB error

(Outdoor unit) E: 63. Inverter error (Outdoor unit) 6 times 3 times Continuous 63 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 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

1-2. Error code table (Wireless LAN indicator)

Internet

Indoor unit

Controller PCB

Parts:

WLAN adapter

Cloud

Mobile app

(Smart device)

Wireless

LAN

router

Outdoor unit

Wireless LAN label

Connection port

MAC: SSID: AP-WF PIN:

Wireless LAN adapter

• Wireless LAN control system diagram example

• Name of parts

TROUBLESHOOTING

• Wireless LAN indicator For confirmation of the error contents, refer the flashing pattern as follows.

Wireless LAN LED (orange) on the indoor unit operate according to the error contents.

E: 18. External communication error between indoor unit and WLAN adapter

Wireless LAN adapter error Flashing slow No error Network communication error between

wireless LAN router and WLAN adapter E: 18. Communication error Flashing slow 18 E: 18. Wireless LAN adapter non-

energized Wireless LAN adapter Sleep mode

(Indoor unit)

Flashing slow: Repeating 7 seconds on/2 seconds off

Error contents Wireless LAN LED (orange) Error code

On: Connection information with router is

available

Off: Connection information with router is

unavailable

On No error

Off 18

Off No error

TROUBLESHOOTING

1-2. Error code table (Wireless LAN indicator) - (03-2) - 1. Error code

Page 37

1-3. Error code table (Mobile app)

Error Name

Error button

Error code

Error Name

Error code

Error button

• Error display

If there is an abnormality on the air conditioning, refer to

When the

– For Android

TROUBLESHOOTING

– For iOS

as follows.

(error button) on the home screen is tapped, error code and error name is displayed.

TROUBLESHOOTING

1-3. Error code table (Mobile app) - (03-3) - 1. Error code

Page 38

• Error code

Serial communication error (Serial Reverse Transfer Error)

Serial communication error (Serial Forward Transfer Error)

Wired remote controller communication error

Indoor unit PCB model information error

Manual auto switch error

Room temp. sensor error

Indoor unit Heat Ex. Middle temp. sensor

TROUBLESHOOTING

error

Indoor unit fan motor error

Outdoor unit main PCB model information error

Inverter error E: 63. Inverter error (Outdoor unit)

PC circuit error E: 64. PFC circuit error (Outdoor unit)

Discharge temp. sensor error

Outdoor unit Heat Ex. liquid temp. sensor error

Outdoor temp. sensor error

Current sensor error E: 84. Current sensor error (Outdoor unit) 84.1 Trip detection E: 94. Trip detection (Outdoor unit) 94.1

Compressor rotor position detection error

Outdoor unit fan motor error

4-way valve error E: 99. 4-way valve error (Outdoor unit) 99.1

Discharge temp. error

Error message Error contents Error code

E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit)

E: 11. Serial communication error (Serial forward transfer error) (Indoor unit)

E: 12. Wired remote controller 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)

11.1

11.2

11.3

11.4

12.1

32.1

35.1

41.1

42.2

51.1

51.2

62.1

62.2

63.1

63.2

64.1

64.3

64.4

64.8

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: 95. Compressor motor control error (Outdoor unit)

E: 97. Outdoor unit fan motor error (Outdoor unit)

E: A1. Discharge temperature error (Outdoor unit)

71.1

73.3

74.1

95.1

95.3

97.3

A1.1

TROUBLESHOOTING

1-3. Error code table (Mobile app) - (03-4) - 1. Error code

Page 39

1-4. Error message for wireless LAN control (Mobile app)

Error message

For Android For iOS

• Error display If there is an abnormality on the wireless control system, refer to error messages as follows.

The error message disappears after 5 seconds and the normal screen is displayed.

TROUBLESHOOTING

1-4. Error message for wireless LAN control (Mobile app)

- (03-5) - 1. Error code

Page 40

• Error message list

– For Android

TROUBLESHOOTING

Error message Cause Solution

Wi-Fi must be enabled to set up new device

We weren’t able to sign you onto null. Please goto the WiFi settings and join the network from there. Return to the app when you’re done.

Could not connect to the device at this time. Please reset the device and try again.

The device failed to connect with service.

Could not register the device. Make sure the device is ready for registration.

Please ensure your air conditioner is ready to pair, and that you have entered its SSID and password correctly.

Registration error

The user has disabled Wi-Fi

Enable the Wi-Fi on the smart device.

on the smart device. The smart device and air

conditioner are connected to difference Wi-Fi networks

Connect the mobile device to the same network as air conditioner, then retry the registration.

when attempting to register.

The air conditioner is not connected to Wi-Fi.

Check if the router connected to the air conditioner has internet access. (You can check by connecting the smart device to the router, then opening the website.) If there is no access, connect the router to the internet.

Smart device is not connected to the same network as the air

Connect the mobile device to the same network as the air conditioner, then retry the registration.

conditioner. Your internet access may be

down or a firewall may be blocking requests to the service.

The air conditioner is not connected to the router.

Enter the Wi-Fi setting on the smart device, then check if the SSID of the air conditioner (AP-WF) is connected. If the air conditioner is connected, retry the registration.

The router the air conditioner is connected to, has no internet access.

The air conditioner is already registered.

If there is a smart device that has already been registered to the air conditioner, unregister by using the registered smart device. Retry the registration with the smart device you wish to register. If you do not own the smart device registered to the air conditioner (lost, property of previous owner, etc.), ask your maker service to unregister the smart device. Notify the MAC address of the WLAN adapter as written on the Wireless LAN label.

If the problem persists even if the all of the above is conducted, please contact your dealer or authorized service personnel. When asking for advice, Notify the MAC address of the WLAN adapter as written on the Wireless LAN label.

Occurs when pairing is executed, when the user erroneously enter the SSID

Enter the SSID literally. (Uppercase and lowercase letters also match)

of the adapter.

TROUBLESHOOTING

1-4. Error message for wireless LAN control (Mobile app)

- (03-6) - 1. Error code

Page 41

TROUBLESHOOTING

General error

Error message Cause Solution

No connectivity to Wi-Fi or the cloud. Please check your

The smart device has no internet access.

network connection. An error occurred while trying

to update your profile. Please try again later.

Device is offline and cannot be modified.

The router the air conditioner is connected to, has no internet access.

The air conditioner is not connected to the router.

Error message Cause Solution

Could not reach service. The smart device has no

internet access.

Connect the mobile device to the internet.

Check if the router connected to the air conditioner has internet access. (You can check by connecting the mobile device to the router, then opening the website.) If there is no access, connect the router to the internet.

Check the W-LAN LED indicators on the air conditioner. If the W-LAN LED lamp is flashing or off, refer to "Error code table

(Wireless LAN indicator)" on page 03-2

Connect the smart device to the internet.

TROUBLESHOOTING

– For iOS

Error message Cause Solution

You need an internet connection to add new devices.

Could not register same LAN device. Make sure both devices are in the same LAN and try again to register.

No registrable device was found. Make sure Wi-Fi setup was successful. This method only works if the Wi-Fi was recently performed.

Could not register the device. Make sure the device is ready for registration.

Registration error

The user has disabled Wi-Fi on their smart device.

The smart device and air conditioner are connected to different Wi-Fi networks when attempting to register.

The air conditioner is not connected to Wi-Fi.

Smart device is not connected to the same network as the air conditioner.

The air conditioner is not connected to the router.

Enable Wi-Fi from the iOS setting.

Connect the smart device to the same network as the air conditioner, then retry the registration.

Connect the mobile device to the same network as the air conditioner, then tap register button.

1-4. Error message for wireless LAN control (Mobile app)

- (03-7) - 1. Error code

Page 42

TROUBLESHOOTING

Error message Cause Solution

Could not register the device. Make sure the device is ready for registration.

Please ensure your air conditioner is ready to pair, and that you have entered its SSID and password correctly.

Registration error

The router the air conditioner is connected to, has no internet access.

The air conditioner is already registered.

If the problem persists even if the all of the above is conducted, please contact your dealer or authorized service personnel. When asking for advice, please notify the MAC address of the WLAN adapter as written on the Wireless LAN label.

Occurs when pairing is executed, when the user erroneously enter the SSID

Enter the SSID literally. (Uppercase and lowercase letters also match)

of the adapter.

TROUBLESHOOTING

General error

Error message Cause Solution

Failed to change password. The smart device has no Cloud not determine service

internet access. reachability. Failed to update property. Could not retrieve schedules. The operation couldn’t be

completed. Operation timed out.

The router the air conditioner

“Device name” is offline. (Device name varies

is connected to has no

internet access.

depending on the air conditioner)

The air conditioner is not

connected to the router.

Connect the mobile device to the internet.

Check if the router connected to the air conditioner has internet access. (You can check by connecting the mobile device to the router, then opening the website to check access.) If there is no access, connect the router to the internet.

Check the W-LAN LED indicators on the air conditioner. If the W-LAN LED lamp is flashing or off, refer to "Error code table

(Wireless LAN indicator)" on page 03-2

Error message Cause Solution

Could not reach service. The smart device has no

Connect the smart device to the internet.

internet access.

1-4. Error message for wireless LAN control (Mobile app) - (03-8) - 1. Error code

Page 43

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 L—N.

↓

2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) - (03-9) - 2. Troubleshooting with error code

Page 44

Check point 4. Check serial signal (Reverse transfer signal)

RED

WHITE

BLACK

WHITE

GREEN

Check serial signal (Reverse transfer signal)

• Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1 —3.

• If it is abnormal, check the parts below.

– Outdoor unit fan motor in "Service parts information" on page 03-64

TROUBLESHOOTING

• 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) - (03-10) - 2. Troubleshooting with error code

Page 45

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

& 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) - (03-11) - 2. Troubleshooting with error code

Page 46

Check point 4. Check serial signal (reverse transfer signal)

RED

WHITE

BLACK

WHITE

GREEN

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 03-64)

TROUBLESHOOTING

• If indoor unit fan motor is abnormal, replace indoor unit fan motor and main PCB.

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) - (03-12) - 2. Troubleshooting with error code

Page 47

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 CN2 (terminal 1—3) of UTY-TWRXZ2 (Communication kit). (Power supply to the remote controller)

Upon correcting the removed connector or mis-wiring, reset the power.

TROUBLESHOOTING

↓

• If it is DC 5 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) - (03-13) - 2. Troubleshooting with error code

Page 48

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) - (03-14) - 2. Troubleshooting with error code

Page 49

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

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)

↓

- (03-15) - 2. Troubleshooting with error code

Page 50

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) - (03-16) - 2. Troubleshooting with error code

Page 51

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 03-70.

• 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) - (03-17) - 2. Troubleshooting with error code

Page 52

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 03-70.

• 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) - (03-18) - 2. Troubleshooting with error code

Page 53

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 03-64.) → 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) - (03-19) - 2. Troubleshooting with error code

Page 54

2-10. E: 58. Intake grille error (Indoor unit)

Indicator Indoor unit

Detective actuator

Forecast of cause

Check point 1. Check limit switch

• Check operation of Micro switch. (any blocking by dust, etc.)

TROUBLESHOOTING

• Remove Micro switch and check ON/OFF switching operation by using a meter.

-> If micro switch is detective, replace it.

Check point 2. Check Connector (CN11)/wire

Operation indicator 5 time flash Timer indicator 8 time flash Economy indicator Continuous flash

Error code E: 58 Indoor unit main PCB Micro switch

When the Micro switch is detected open while running the compressor.

Micro switch failure

Shorted connector/wire

Main PCB failure

TROUBLESHOOTING

↓

Check loose contact of CN11/shorted wire (pinched wire).

-> Replace micro switch if the wire is abnormal

↓

Check point 3. Replace main PCB

If Check Point 1 and 2 do not improve the symptom, change main PCB.

↓

End

2-10. E: 58. Intake grille error (Indoor unit) - (03-20) - 2. Troubleshooting with error code

Page 55

2-11. 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

2-11. E: 62. Outdoor unit main PCB error (Outdoor unit) - (03-21) - 2. Troubleshooting with error code

Page 56

2-12. E: 63. Inverter error (Outdoor unit)

Operation indicator 6 time flash

Indicator Indoor unit

Detective actuator Outdoor unit Inverter PCB Error information received from inverter PCB Forecast of cause

Timer indicator 3 time flash Economy indicator Continuous flash Error code E: 63

External cause

Power supply to inverter PCB wiring disconnection or

open

Inverter PCB failure

Check point 1. Turn the power on again?

Error displayed again?

TROUBLESHOOTING

Check point 2. Check the wiring (power supply to inverter PCB)

• Connector and wiring connection state check

• Cable open check

Check point 3. Replace inverter PCB

Replace inverter 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.

If no, go to "Check point 1-2".

TROUBLESHOOTING

↓

End

↓

End

2-12. E: 63. Inverter error (Outdoor unit) - (03-22) - 2. Troubleshooting with error code

Page 57

2-13. 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

2-13. E: 64. PFC circuit error (Outdoor unit) - (03-23) - 2. Troubleshooting with error code

Page 58

2-14. 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 03-70.

• 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: 71. Discharge thermistor error (Outdoor unit) - (03-24) - 2. Troubleshooting with error code

Page 59

2-15. 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 03-70.

• 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

2-15. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit) - (03-25) - 2. Troubleshooting with error code

Page 60

2-16. 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 03-70.

• 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

2-16. E: 74. Outdoor temperature thermistor error (Outdoor unit) - (03-26) - 2. Troubleshooting with error code

Page 61

2-17. 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

2-17. E: 84. Current sensor error (Outdoor unit) - (03-27) - 2. Troubleshooting with error code

Page 62

2-18. 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

2-18. E: 94. Trip detection (Outdoor unit) - (03-28) - 2. Troubleshooting with error code

Page 63

2-19. 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-

64.)

→ 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

2-19. E: 95. Compressor motor control error (Outdoor unit) - (03-29) - 2. Troubleshooting with error code

Page 64

2-20. 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 03-64.) → If outdoor unit fan motor is abnormal, replace outdoor unit fan motor and main PCB.

↓

2-20. E: 97. Outdoor unit fan motor error (Outdoor unit) - (03-30) - 2. Troubleshooting with error code

Page 65

Check point 4. Check output voltage of main PCB

1 2 3 4 5 6 7

BLACK WHITE YELLOW

RED

FAN MOTOR

BROWN

Check outdoor unit circuit diagram and the voltage. (Measure at main PCB side connector)

NOTE:

Red—Black 240 V — 400 V

TROUBLESHOOTING

White—Black 13.5 V — 16.5 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

2-20. E: 97. Outdoor unit fan motor error (Outdoor unit) - (03-31) - 2. Troubleshooting with error code

Page 66

2-21. 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 03-70. → If defective, replace the thermistor.

↓

2-21. E: 99. 4-way valve error (Outdoor unit) - (03-32) - 2. Troubleshooting with error code

Page 67

Check point 3. Check the solenoid coil and 4-way valve

• Solenoid coil Remove CN30 from PCB and check the resistance value of coil. Resistance value is 1.88 kΩ —

2.29 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 CN30 of Main PCB. → Check if AC 187 V (AC 208 V -10%) to AC 253 V (AC 230 V +10%) appears at CN30 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

2-21. E: 99. 4-way valve error (Outdoor unit) - (03-33) - 2. Troubleshooting with error code

Page 68

2-22. 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 03-64.

• 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-

64.)

↓

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

03-70.

↓

2-22. E: A1. Discharge temperature error (Outdoor unit) - (03-34) - 2. Troubleshooting with error code

Page 69

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

2-22. E: A1. Discharge temperature error (Outdoor unit) - (03-35) - 2. Troubleshooting with error code

Page 70

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 - (03-36) - 3. Troubleshooting without error code

Page 71

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 L - N → If no, go to "Check point 1" and "Check point 2".

• Check fuse in main PCB. If fuse is open, check if the wiring between terminal and main PCB is loose, and replace fuse.

• Check 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 - (03-37) - 3. Troubleshooting without error code

Page 72

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 CN2 (terminal 1—3) of UTY-TWBXF1(Communication kit). (Power supply to remote controller)

• If it is DC 5 V, remote controller is failure. (The controller PCB is normal)

-> Replace remote controller.

• If it is DC 0 V, controller PCB is failure. (Check the remote controller once again)

-> Replace controller PCB.

↓

Check point 4. Replace main PCB

If check point 1 to 3 do not improve the symptom, change main PCB.

↓

End

3-3. No operation (Power is on) - (03-38) - 3. Troubleshooting without error code

Page 73

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 03-64.

• Check compressor. Refer to compressor in "Service parts information" on page 03-64.

Refer to inverter compressor in "Service parts information" on page 03-64.

NOTE:

When recharging the refrigerant, make sure to perform vacuuming, and recharge the specified amount.

↓

End

3-4. No cooling/No heating - (03-39) - 3. Troubleshooting without error code

Page 74

NOTES:

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

3-4. No cooling/No heating - (03-40) - 3. Troubleshooting without error code

Page 75

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 03-64.

↓

End

3-5. Abnormal noise - (03-41) - 3. Troubleshooting without error code

Page 76

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 - (03-42) - 3. Troubleshooting without error code

Page 77

3-7. Too warm

Forecast of cause

Check point 1. Check insulation level of structure of house

Is insulation level greater than R-13? → If no, go to "Check Point 4".

Check point 2. Check function setting

TROUBLESHOOTING

If insulation level is greater than R-13 set function 95 to 01. NOTE: For details of function setting number 95, refer to "Function settings " in Chapter 5. FIELD

Check Point 3. Check effects of function setting change

House insulation setting has not been changed.

Temperature sensing location has not been changed.

Installation location of the wired remote.

Function settings have not been changed.

↓

TROUBLESHOOTING

WORKING on page 05-1.

↓

Is the space still too warm in relation to set point?

↓

Check Point 4. Verfity room temperature sensing location

Do you want room temperature sensed at the wired remote controller (Wired remote sensor) or by they build in sensor inside the unit (Indoor unit sensor)? → If indoor unit sensor, go to "Check Point 5".

→ If wired remote sensor, go to "Check point 8".

Check Point 5. Check the remote controller display

Is the "Thermo Sensor Icon" displayed on the screen?

→ If no, go to "Check point 7".

↓

3-7. Too warm - (03-43) - 3. Troubleshooting without error code

Page 78

Check point 6. Check the remote controller

Hold down the THERMO SENSOR button until the thermo sensor icon is turned off.

→ If the space is still too warm, go to "Check point 7".

TROUBLESHOOTING

Check point 7. Check function settings

↓

TROUBLESHOOTING

End

Using the table on the right adjust function 31. (Room Temperature Control for indoor unit sensor) NOTE: For details of function setting number 31, refer to "Function settings " in Chapter 5. FIELD

WORKING on page 05-1.

↓

End

Check point 8. Check the remote controller display

Is the "Thermo Sensor Icon" displayed on the screen?

→ If no, go to "Check point 8-1".

↓

Check point 9. Check the function Setting

Is function 48 (Room temperature sensor switching) set to 01? → If no, go to "Check point 9-1".

↓

3-7. Too warm - (03-44) - 3. Troubleshooting without error code

Page 79

Check point 10. Location of the remote controller

Is the mounting location of the wired remote controller affecting the temperature sensing? (Sunlight on the remote, heat source next to the remote) → If no, go to "Check point 12".

↓

Check point 11. Location of the remote controller

Move the remote controller. → If the space is still too warm, go to "Check point 12".

↓

End

TROUBLESHOOTING

Check point 8-1. Check function setting

Is function 42 (Indoor room temperature sensor switching function) set to 01? NOTE: For details of function setting number 42, refer to "Function settings " in Chapter 5. FIELD

Check point 8-2. Check the remote controller

Press and hold down the THERMO SENSOR button to turn on the icon.

TROUBLESHOOTING

WORKING on page 05-1.

↓

→ If the space is still too warm, go to "Check point 9".

↓

End

3-7. Too warm - (03-45) - 3. Troubleshooting without error code

Page 80

Check point 9-1. Check function setting

Change setting of function 48 (Room temperature sensor switching) to 01. NOTE: For details of function setting number 48, refer to "Function settings " in Chapter 5. FIELD

WORKING on page 05-1.

↓

Check point 9-2. Check the effects of function setting change

Did this function setting improve temperature control? → If the space is still too warm, go to "Check point 10".

↓

End

TROUBLESHOOTING

Check point 12. Check function setting

Using the table on the right adjust temperature correction by changing function setting 36. (Room Temperature control for wired remote controller sensor)

NOTE: For details of function setting number 36, refer to "Function settings " in Chapter 5. FIELD

TROUBLESHOOTING

WORKING on page 05-1.

↓

End

3-7. Too warm - (03-46) - 3. Troubleshooting without error code

Page 81

3-8. Too cool

Forecast of cause

Check point 1. Check insulation level of structure of house

Is insulation level greater than R-13? → If no, go to "Check Point 4".

Check point 2. Check function setting

TROUBLESHOOTING

If insulation level is greater than R-13 set function 95 to 01. NOTE: For details of function setting number 95, refer to "Function settings " in Chapter 5. FIELD

Check Point 3. Check effects of function setting change

House insulation setting has not been changed.

Temperature sensing location has not been changed.

Installation location of the wired remote.

Function settings have not been changed.

↓

TROUBLESHOOTING

WORKING on page 05-1.

↓

Is the space still too cool in relation to set point?

↓

Check Point 4. Verfity room temperature sensing location

→ If wired remote sensor, go to "Check point 8".

Check Point 5. Check the remote controller display

Is the "Thermo Sensor Icon" displayed on the screen?

→ If no, go to "Check point 7".

↓

3-8. Too cool - (03-47) - 3. Troubleshooting without error code

Page 82

Check point 6. Check the remote controller

Hold down the THERMO SENSOR button until the thermo sensor icon is turned off.

→ If the space is still too cool, go to "Check point 7".

TROUBLESHOOTING

Check point 7. Check function settings

↓

TROUBLESHOOTING

End

Using the table on the right adjust function 30. (Room Temperature Control for indoor unit sensor) NOTE: For details of function setting number 30, refer to "Function settings " in Chapter 5. FIELD

WORKING on page 05-1.

↓

End

Check point 8. Check the remote controller display

Is the "Thermo Sensor Icon" displayed on the screen?

→ If no, go to "Check point 8-1".

↓

Check point 9. Check the function Setting

Is function 48 (Room temperature sensor switching) set to 01? → If no, go to "Check point 9-1".

↓

3-8. Too cool - (03-48) - 3. Troubleshooting without error code

Page 83

Check point 10. Location of the remote controller

Is the mounting location of the wired remote controller affecting the temperature sensing? (Sunlight on the remote, heat source next to the remote) → If no, go to "Check point 12".

↓

Check point 11. Location of the remote controller

Move the remote controller. → If the space is still too cool, go to "Check point 12".

↓

End

TROUBLESHOOTING

Check point 8-1. Check function setting

Is function 42 (Indoor room temperature sensor switching function) set to 01? NOTE: For details of function setting number 42, refer to "Function settings " in Chapter 5. FIELD

Check point 8-2. Check the remote controller

Press and hold down the THERMO SENSOR button to turn on the icon.

TROUBLESHOOTING

WORKING on page 05-1.

↓

→ If the space is still too cool, go to "Check point 9".

↓

End

3-8. Too cool - (03-49) - 3. Troubleshooting without error code

Page 84

Check point 9-1. Check function setting

Change setting of function 48 (Room temperature sensor switching) to 01. NOTE: For details of function setting number 48, refer to "Function settings " in Chapter 5. FIELD

WORKING on page 05-1.

↓

Check point 9-2. Check the effects of function setting change

Did this function setting improve temperature control? → If the space is still too cool, go to "Check point 10".

↓

End

TROUBLESHOOTING

Check point 12. Check function setting

Using the table on the right adjust temperature correction by changing function setting 35. (Room Temperature control for wired remote controller sensor)

NOTE: For details of function setting number 35, refer to "Function settings " in Chapter 5. FIELD

TROUBLESHOOTING

WORKING on page 05-1.

↓

End

3-8. Too cool - (03-50) - 3. Troubleshooting without error code

Page 85

4. Troubleshooting with error code (For wireless LAN adapter)

Controller

PCB

4-1. E: 18. External communication error between indoor unit

and WLAN adapter

Operation indicator 1 time flash

Indoor unit

Indicator

Wireless LAN adapter

Wireless LAN adapter PCB After receiving a signal from the wireless LAN adapter,

Timer indicator 8 time flash Economy indicator Continuous flash Error code E: 18 LED1 (green) Flashing fast LED2 (orange) On

the same signal has not been received for 15 seconds.

TROUBLESHOOTING

Detective actuator

Forecast of cause

Check point 1. Check the connection

• Check any loose or removed connection of between the wireless LAN adapter PCB and controller PCB.

-> If there is abnormal condition, correct it.

• Check the connection condition on the controller PCB.

-> If there is loose connector, open cable or mis-wiring, correct it.

TROUBLESHOOTING

Controller PCB

Connection between indoor unit and wireless LAN

adapter failure

Wireless LAN adapter PCB failure

Controller PCB failure

↓

Check point 2. Replace wireless LAN adapter.

If check point 1 do not improve the symptom, replace the wireless LAN adapter and cancel the registration of air conditioner on the mobile app. After replacing the adapter, perform the pairing on the mobile app.

For the method of the mobile app, refer to "Mobile app setting method" on page 03-59.

↓

Check point 3. Replace controller PCB

If check point 1 to 2 do not improve the symptom, replace the controller PCB.

↓

End

4-1. E: 18. External communication error between indoor unit and WLAN adapter - (03-51) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 86

4-2. Wireless LAN adapter error

Setting button

Operation indicator No indication

Indoor unit

Indicator

Wireless LAN adapter

Wireless LAN adapter setting button

Detective actuator

Wireless LAN adapter PCB

Timer indicator No indication Economy indicator No indication Error code — LED1 (green) Flashing fast LED2 (orange) Flashing fast

When the setting button becomes on for consecutive 60 seconds or more.

TROUBLESHOOTING

Forecast of cause

Check point 1. Check the setting button

Check if setting button is kept pressed.

-> If the setting button is held down by the foreign matter, remove the foreign matter or remove the cause of the button press.

Check point 2. Replace wireless LAN adapter.

For the method of the mobile app, refer to "Mobile app setting method" on page 03-59.

Check point 3. Replace controller PCB

Wireless LAN adapter setting button failure

Wireless LAN adapter PCB failure

TROUBLESHOOTING

↓

If check point 1 to 2 do not improve the symptom, replace the Wireless LAN adapter.

↓

End

4-2. Wireless LAN adapter error - (03-52) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 87

4-3. Network communication error between wireless LAN router

Controller

PCB

and WLAN adapter

Operation indicator No indication

Indoor unit

Indicator

Wireless LAN adapter

Wireless LAN router When the not connection between wireless LAN adapter

Timer indicator No indication Economy indicator No indication Error code — LED1 (green) On LED2 (orange) Flashing fast

and wireless LAN router.

Detective actuator

TROUBLESHOOTING

Forecast of cause

Check point 1. Check the connection cable

Check the connection cable on the wireless LAN router.

-> If there is loose connector, open cable or mis-wiring, correct it.

Check point 2. Check the connection status.

Check the connection status to the internet and wireless LAN router.

-> If the wireless LAN router is not connected to the internet, check the transmission between wireless LAN products (ex. PC or game console, etc.) other than air conditioner and wireless LAN router.

Wireless LAN adapter PCB

TROUBLESHOOTING

Connection cable failure of wireless LAN router

Connection between wireless LAN adapter and wireless

LAN router failure

Wireless LAN router failure

Wireless LAN adapter PCB failure

↓

If no, go to "Check point 2-2".

↓

Check point 3. Turn on the power again of air conditioner.

If check point 1 to 2 do not improve the symptom, turn on the power of the air conditioner again and wait for 60 seconds.

↓

4-3. Network communication error between wireless LAN router and WLAN adapter - (03-53) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 88

Check point 4. Replace wireless LAN adapter.

If check point 3 do not improve the symptom, replace the wireless LAN adapter and cancel the registration of air conditioner on the mobile app. After replacing the adapter, perform the pairing on the mobile app.

For the method of the mobile app, refer to "Mobile app setting method" on page 03-59.

Check point 2-2. Check the transmission state

Check the wireless transmission state pf the wireless LAN router (LED status).

TROUBLESHOOTING

-> If the wireless transmission from the wireless LAN router has not been outgoing, inquire to the wireless LAN router maker.

↓

End

TROUBLESHOOTING

↓

End

4-3. Network communication error between wireless LAN router and WLAN adapter - (03-54) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 89

4-4. E: 18. Communication error

Controller

PCB

Indicator

Detective actuator

TROUBLESHOOTING

Forecast of cause

Operation indicator 1 time flash

Indoor unit

Wireless LAN adapter

Wireless LAN router When the external communication error between indoor Wireless LAN adapter PCB

Indoor unit controller PCB

Timer indicator 8 time flash Economy indicator Continuous flash Error code E: 18 LED1 (green) Flashing fast LED2 (orange) Flashing fast

unit and WLAN adapter and network communication error between wireless LAN router and WLAN adapter has occurred simultaneously.

Connection cable failure of wireless LAN router

Wireless LAN router failure

Connection between indoor unit and wireless LAN

adapter failure

Connection between wireless LAN adapter and wireless

LAN router failure

Wireless LAN adapter PCB failure

Controller PCB failure

TROUBLESHOOTING

Check point 1. Check the connection cable

Check the connection cable on the wireless LAN router.

-> If there is loose connector, open cable or mis-wiring, correct it.

↓

Check point 2. Check the connection status.and transmission state

• Check the connection status to the internet and wireless LAN router.

-> If the wireless LAN router is not connected to the internet, check the transmission between wireless LAN products (ex. PC or game console, etc.) other than air conditioner and wireless LAN router.

If no, go to "Check point 4".

• Check the wireless transmission state of wireless LAN router (LED status).

-> If the wireless transmission from the wireless LAN router has not been outgoing, inquire to wireless LAN router maker.

If the display pattern is changed as follows, go to "Check point 3-2".

– LED 1 (green): flashing fast – LED 2 (orange): on

If no, go to "Check point 3-1".

↓

4-4. E: 18. Communication error - (03-55) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 90

Check point 3-1. Turn on the power again of air conditioner.

If check point 1 to 2 do not improve the symptom, turn on the power of the air conditioner again and wait for 60 seconds.

-> When the flashing pattern of the LED 2 (orange) is on, go to "Check point 3-2".

-> When the flashing pattern of the LED 2 (orange) is flashing fast, go to "Check point 4".

Check point 3-2. Check the connection.

• Check any loose or removed connection of between the wireless LAN adapter PCB and controller PCB.

-> If there is abnormal condition, correct it.

• Check the connection condition on the controller PCB.

TROUBLESHOOTING

-> If there is loose connector, open cable or mis-wiring, correct it.

Check point 4. Replace wireless LAN adapter.

If check point 2 to 3 do not improve the symptom, replace the wireless LAN adapter and cancel the registration of air conditioner on the mobile app. After replacing the adapter, perform the pairing on the mobile app.

↓

TROUBLESHOOTING

↓

For the method of the mobile app, refer to "Mobile app setting method" on page 03-59.

↓

Check point 5. Replace controller PCB

If check point 4 do not improve the symptom, replace the controller PCB.

↓

End

4-4. E: 18. Communication error - (03-56) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 91

4-5. E: 18. Wireless LAN adapter non-energized

Operation indicator 1 time flash Timer indicator 8 time flash Economy indicator Continuous flash Error code E: 18 LED1 (green) Off LED2 (orange) Off

When the voltage (DC 12 V) does not output from the controller PCB.

Indoor unit controller PCB failure

Wireless LAN adapter PCB failure

Wiring connection failure

Indicator

Detective actuator

Forecast of cause

Indoor unit

Wireless LAN adapter

Indoor unit controller PCB Wireless LAN adapter PCB

TROUBLESHOOTING

Check point 1. Check the connection.

• Check any loose or removed connection of between the wireless LAN adapter PCB and controller PCB.

-> If there is abnormal condition, correct it.

• Check the connection condition on the controller PCB.

-> If there is loose connector, open cable or mis-wiring, correct it.

Check point 2. Check the wireless LAN adapter PCB and the controller PCB

Check voltage at CN6 (terminal 1—2) of main PCB. (Power supply to remote controller)

• If it is DC 0 V, controller PCB is failure.

-> Replace controller PCB.

• If it is DC 12 V, wireless LAN adapter PCB is failure.

-> Replace the wireless LAN adapter and cancel the registration of air conditioner on the mobile app.

After replacing the adapter, perform the pairing on the mobile app.

TROUBLESHOOTING

↓

For the method of the mobile app, refer to "Mobile app setting method" on page 03-59.

↓

End

4-5. E: 18. Wireless LAN adapter non-energized - (03-57) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 92

4-6. Wireless LAN adapter Sleep mode (Indoor unit)

Indicator

Detective actuator Sleep mode

Forecast of cause Sleep mode

Check point 1. Cheak the sleep mode

Press the Wireless LAN adapter setting button the 3 seconds or more.

TROUBLESHOOTING

-> If the display pattern is changed as follows, refer to "Network communication error between wire-

less LAN router and WLAN adapter" on page 03-53.

• LED 1 (green): on

• LED 2 (orange): flashing fast

Indoor unit

Wireless LAN adapter

Operation indicator No indication Timer indicator No indication Economy indicator No indication Error code — LED1 (green) Off LED2 (orange) Off

When the state in which fly a wireless(SSID) have passed 1 hour.

TROUBLESHOOTING

4-6. Wireless LAN adapter Sleep mode (Indoor unit)

- (03-58) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 93

4-7. Mobile app setting method

FGL air

¢ Air conditioner deregistration method

When the wireless LAN adapter is replaced, deregistration of all air conditioner is necessary on the mobile app.

1. Launch the mobile app.

2. Press and hold the registered device name of the air conditioner.

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3. If the Unregister button is displayed, tap the button.

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4. Tap the Yes button.

5. Deregstration of the air conditioner is completed.

4-7. Mobile app setting method

- (03-59) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 94

¢ Air conditioner registration pairing method

Off

Flashing

FGL air

john@ fgl.c om

ЫЫЫЫЫ Ы

Butto n mod e

Manua l mod e

on/off: 2 sec/2 sec

Wireless router

Choose the following modes to connect the air conditioner to the wireless LAN router.

NOTES:

• Before starting this setting, wait for 60 seconds or more after the power supply is connected to the air conditioner (via breaker or plug).

• Check that the smartphone or tablet PC is linked to the wireless router to be connected to the air conditioner. The setting does not work if the same wireless LAN router is not connected.

• The displayed screen design may differ depending on the version of the mobile app.

• To control 2 or more air conditioners with the same smartphone or tablet PC, repeat the setup of the chosen mode.

Lighting pattern:

TROUBLESHOOTING

 Button mode

1. Launch the mobile app.

2. Sign in with your E-mail address and password following the screen on the mobile app.

3. Press the + button to add a new air conditioner.

4. Confirm that LED 2 is flashing (On/Off at 2 seconds intervals). Then select Button mode on the

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screen. If LED 2 and 2 are off, push the setting button once.

5. Press the WPS button on the wireless LAN router to be connected. For the button location of the wireless LAN router and how to press it, refer to the operation manual of the wireless LAN router.

4-7. Mobile app setting method

- (03-60) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 95

6. Confirm LED 2 is flashing (On/Off at 2 seconds intervals). Then press and hold the setting but-

on/off: 2 sec/2 sec

on/off: 2 sec/0.5 sec

Regis ter

Regis trati on Succe ssful !

2 times

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7. Press Register button to start the connection with the wireless LAN router.

ton on the wireless LAN adapter for 3 seconds.

LED 2 lighting will change. (On/Off: 2 sec./2 sec. → 2 sec./0.5 sec.) Confirm both of the LED 1 and 2 are on to proceed.

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Both of the LED 1 and 2 flash 2 times and a message appear when the setup is completed.

4-7. Mobile app setting method - (03-61) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 96

 Manual mode (For Android)

FGL air

john@ fgl.c om

ЫЫЫЫЫ Ы

Butto n mode

Manua l mode

AC-UT Y-xxxxx xxxxx

Enter

passw ord

ЫЫЫЫЫ Ы

Conne ct de vice

Selec ted r outer

Home A P

Enter

passw ord

Selec t the WLAN

Acces s Poi nt

XYZ AP

ЫЫЫЫЫ Ы

ABC12 3

Conne ct de vice

Selec ted r outer

Regis tratio n

Succe ssful !

2 times

1. Launch the mobile app.

2. Sign in with your E-mail address and password following the screen on the mobile app.

3. Press the + button to add a new air conditioner.

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4. Select manual mode.

5. Select the SSID of the air conditioner to be connected.

6. Select the SSID of the wireless LAN router to be connected.

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If both of the LED 1 and 2 are off, push the setting button once.

Input the PIN code written on the wireless LAN label.

Input the wireless LAN router (wireless LAN access point) password then press Connect device button.

7. When setup is completed, both of the LED 1 and 2 flash 2 times, and a message appear.

4-7. Mobile app setting method

- (03-62) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 97

 Manual mode (For iOS)

FGL air

john@ fgl.c om

ЫЫЫЫЫ Ы

Butto n mode

Manua l mode

Open W-LAN setti ng

conti nue

AC-UT Y-xxxxx xxxxx

Enter

passw ord

ЫЫЫЫЫ Ы

Conne ct de vice

Selec ted r outer

Home A P

Enter

passw ord

Selec t the WLAN

Acces s Poi nt

XYZ AP

ЫЫЫЫЫ Ы

ABC12 3

Conne ct de vice

Selec ted r outer

Regis tratio n Succe ssful!

2 times

1. Launch the mobile app.

2. Sign in with your E-mail address and password following the screen on the mobile app.

3. Press the + button to add a new air conditioner.

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4. Select manual mode.

5. Select Open W-LAN setting button or activate the wireless LAN by pressing the Home button

6. Input the PIN code written on the wireless LAN label.

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If both of the LED 1 and 2 are off, push the setting button once.

→ Setting button → Wi-Fi button.

Select the SSID of the air conditioner to be connected.

7. Select the SSID of the wireless LAN router to be connected. Input the wireless LAN router (wireless LAN access point) password then press Connective device button.

When setup is completed, both of the LED 1 and 2 flash 2 times and a message appear.

4-7. Mobile app setting method

- (03-63) - 4. Troubleshooting with error code (For wireless LAN adapter)

Page 98

5. Service parts information

MPa MPa

5-1. 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?

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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.

↓ ↓ ↓

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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

5-1. Compressor - (03-64) - 5. Service parts information

Page 99

5-2. Inverter compressor

R(U)

S(V)

(WHITE)

T(W)

(BLACK)

(RED)

Terminal cover opened

Check point 1. Check connection

Check terminal connection of compressor. (loose or incorrect wiring)

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↓

Check point 2. Check winding resistance

Check winding resistance of each terminal. Resistance value: 1.916 Ω at 68 °F (20°C)

→ If the resistance value is 0 Ω or infinite, replace compressor.

↓

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Check point 3. Replace inverter PCB

If check point 1 to 2 do not improve the symptom, replace main PCB.

5-2. Inverter compressor - (03-65) - 5. Service parts information

Page 100

5-3. 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)

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→ 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)

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When valve is closed, it has a temp. difference between inlet and outlet

5-3. Outdoor unit Electronic Expansion Valve (EEV) - (03-66) - 5. Service parts information

If it is open, it has no temp. difference between inlet and outlet

Fujitsu 12LZAS1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SERVICE MANUAL

1. GENERAL INFORMATION

1. Specifications

1-1. Indoor unit

1-2. Outdoor unit

2. Dimensions

2-1. Indoor unit

¢ Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

2-2. Outdoor unit

Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

2. TECHNICAL DATA AND PARTS LIST

1. Precautions

2. Indoor unit parts list

2-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

¢ Exterior parts and Accessories

¢ Chassis

3. Outdoor unit parts list

¢ Exterior parts and chassis

3-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (02-6) - 3. Outdoor unit parts list

¢ Compressor

4. Accessories

4-1. Indoor unit

Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

4-2. Outdoor unit

Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

5. Optional parts

5-1. Indoor unit

Controllers

Others

6. Refrigerant system diagrams

6-1. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1 - (02-13) - 6. Refrigerant system diagrams

7. Wiring diagrams

7-1. Indoor unit

Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

7-2. Outdoor unit

Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

8. PC board diagrams

8-1. Models: ASUG09LZAS, ASUG12LZAS, and ASUG15LZAS

8-2. Models: AOUG09LZAH1, AOUG12LZAH1, and AOUG15LZAH1

3. TROUBLESHOOTING

1. Error code

1-1. Error code table (Indoor unit and wired remote controller)

1-2. Error code table (Wireless LAN indicator)

1-3. Error code table (Mobile app)

1-4. Error message for wireless LAN control (Mobile app)

2. Troubleshooting with error code

2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) - (03-9) - 2. Troubleshooting with error code

2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) - (03-11) - 2. Troubleshooting with error code

2-3. E: 12. Wired remote controller communication error (Indoor unit) - (03-13) - 2. Troubleshooting with error code

2-4. E: 18. External communication error (Indoor unit)

2-5. E: 32. Indoor unit main PCB error (Indoor unit)

2-6. E: 35. MANUAL AUTO button error (Indoor unit)

2-7. E: 41. Room temperature sensor error (Indoor unit)

2-8. E: 42. Indoor unit heat exchanger sensor error (Indoor unit)

2-9. E: 51. Indoor unit fan motor error (Indoor unit)

2-10. E: 58. Intake grille error (Indoor unit)

2-11. E: 62. Outdoor unit main PCB error (Outdoor unit)

2-12. E: 63. Inverter error (Outdoor unit)

2-13. E: 64. PFC circuit error (Outdoor unit)

2-14. E: 71. Discharge thermistor error (Outdoor unit)

2-15. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit) - (03-25) - 2. Troubleshooting with error code

2-16. E: 74. Outdoor temperature thermistor error (Outdoor unit)

2-17. E: 84. Current sensor error (Outdoor unit)

2-18. E: 94. Trip detection (Outdoor unit)

2-19. E: 95. Compressor motor control error (Outdoor unit)

2-20. E: 97. Outdoor unit fan motor error (Outdoor unit)

2-21. E: 99. 4-way valve error (Outdoor unit)

2-22. E: A1. Discharge temperature error (Outdoor unit)

3. Troubleshooting without error code

3-1. Indoor unit—No power

3-2. Outdoor unit—No power

3-3. No operation (Power is on)

3-4. No cooling/No heating

3-5. Abnormal noise

3-6. Water leaking

3-7. Too warm