Fujitsu ACUH09LUAS1 Service Manual Download

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7-2. Models: AOUH12LUAS1 and AOUH18LUAS1

Strainer

3-way

valve

2-way

valve

Muffler

4-way valve

Expansion valve

Heat exchanger

(INDOOR)

(OUTDOOR)

sso

Cooling

Heating

Muffler

Accumulator

: Thermistor (Discharge temperature)

: Thermistor (Outdoor temperature)

: Thermistor (Heat exchanger out temperature)

: Thermistor (Compressor temperature)

: Thermistor (Room temperature)

: Thermistor (Pipe temperature)

: Thermistor (Heat exchanger middle temperature)

7-2. Models: AOUH12LUAS1 and AOUH18LUAS1

- (02-21) -

7. Refrigerant system diagrams

TEC

Summary of Contents for ACUH09LUAS1

Page 1: ...AIR CONDITIONER Cassette type SERVICE MANUAL INDOOR ACUH09LUAS1 ACUH12LUAS1 ACUH18LUAS1 OUTDOOR AOUH09LUAS1 AOUH12LUAS1 AOUH18LUAS1 SR_AU021EF_02 2021 04 26 ...

Page 2: ...please check with our authorized dealer Trademarks FGLair is trademark of Fujitsu General Limited in the United States other countries or both Google Play is trademark of Google Inc App Store is a service mark of Apple Inc registered in the U S and other countries Copyright 2021 Fujitsu General Limited All rights reserved ...

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 2021 04 02 SR_CH01_AU021EF_01 ...

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: ...ating 9 3 11 3 14 8 Fan Airflow rate Cooling HIGH CFM m3 h 318 540 359 610 435 740 MED 288 490 312 530 341 580 LO 259 440 276 470 288 490 QUIET 230 390 241 410 Heating HIGH 318 540 359 610 435 740 MED 288 490 312 530 341 580 LO 259 440 276 470 288 490 QUIET 230 390 241 410 Type Q ty Turbo 1 Motor output 54 Sound pressure level 2 Cooling HIGH dB A 33 37 42 MED 32 33 36 LO 29 31 32 QUIET 28 Heating ...

Page 8: ...0 m Between outdoor unit and indoor unit Protective function might work when using it outside the operation range 1 Maximum operating current is the total current of the indoor unit and the outdoor unit 2 Sound pressure level Measured values in manufacturer s anechoic chamber Because of the surrounding sound environment the sound levels measured in actual installation conditions might be higher th...

Page 9: ... 21 5 16 31 7 16 11 7 16 542 799 290 24 7 8 31 7 16 11 7 16 632 799 290 Gross 23 11 16 37 14 3 4 602 940 375 27 1 4 37 14 3 4 692 940 375 eight Net lb kg 70 32 84 38 86 39 Gross 77 35 95 43 Connection pipe Size Liquid in mm Ø 1 4 Ø 6 35 Gas Ø 3 8 Ø 9 52 Ø 1 2 Ø 12 7 Method Flare Pre charge length ft m 49 15 66 20 Max length 66 20 98 30 Max height difference 49 15 Operation range Cooling F C 14 to ...

Page 10: ...4 7 16 620 24 7 16 620 IR receiver Grid type grille View B View C 20 7 8 530 2 15 16 75 14 9 16 370 21 1 4 540 11 1 4 285 11 1 4 285 4 1 2 114 4 1 2 114 10 5 16 262 9 5 8 245 5 13 16 146 1 9 16 40 4 102 5 5 16 135 9 13 16 250 1 3 5 40 3 7 8 99 1 3 16 30 1 3 16 30 2 5 16 58 4 1 8 108 a Ceiling openings Cassette grille Option Grid type in mm 22 13 16 to 24 580 to 610 2 1 Indoor unit 01 4 2 Dimension...

Page 11: ...m NOTES To set 3 direction optional Air outlet shutter plate UTR DZB must be installed and the out let direction need to be switched to 3 way by remote controller hen installing the indoor unit be careful about the maintenance space In 3 way outlet mode changing of ceiling height setting by function setting 20 is prohibited Ceiling height setting function setting 20 is allowed to be changed only i...

Page 12: ...n 4 M10 hole 31 7 16 799 2 11 16 68 1 5 16 33 1 3 16 30 3 4 19 21 5 16 542 13 16 20 Side view Side view Front view 11 7 16 290 1 2 13 Unit in mm Bottom view Airflow Drain port Ø1 5 8 42 Side view Valve part 4 3 4 120 4 1 4 184 7 1 16 180 1 7 16 37 15 11 16 399 Hole Hole Hole 2 2 Outdoor unit 01 6 2 Dimensions GENERAL INFORMATION GENERAL INFORMATION ...

Page 13: ...1 3 16 30 4 5 16 109 13 7 8 353 24 7 8 632 13 16 20 13 330 Pitch of bolts for installation Pitch of bolts for installation 4 M10 hole Unit in mm Side view Valve part 4 3 4 120 4 1 4 184 7 1 16 180 Bottom view Airflow Drain port Ø1 5 8 42 1 7 16 37 15 11 16 399 Hole Hole Hole 2 2 Outdoor unit 01 7 2 Dimensions GENERAL INFORMATION GENERAL INFORMATION ...

Page 14: ...2 2 Outdoor unit 01 8 2 Dimensions GENERAL INFORMATION GENERAL INFORMATION ...

Page 15: ...2 TECHNICAL DATA AND PARTS LIST 2021 04 02 SR_CH02_AU021EF_01 ...

Page 16: ...odels AOUH12LUAS1 and AOUH18LUAS1 02 12 5 Accessories 02 16 5 1 Indoor unit 02 16 5 2 Outdoor unit 02 16 6 Optional parts 02 17 6 1 Indoor unit 02 17 7 Refrigerant system diagrams 02 20 7 1 Models AOUH09LUAS1 02 20 7 2 Models AOUH12LUAS1 and AOUH18LUAS1 02 21 8 Wiring diagrams 02 22 8 1 Indoor unit 02 22 8 2 Outdoor unit 02 23 9 PC board diagrams 02 25 9 1 Models ACUH09LUAS1 ACUH12LUAS1 and ACUH18...

Page 17: ...commended by the manufacturer ork ork in confined spaces shall be avoided The area around the workspace shall be sectioned off Electric shock may occur After turning off the power always wait 5 minutes before touching electrical components Do not touch the fins of the heat exchanger Touching the heat exchanger fins could result in damage to the fins or personal injury such as skin rupture Do not p...

Page 18: ...tional part parts list 2 1 Model UTG CCGFGA Overall 17 16 15 5 4 6 7 8 2 3 1 9 14 13 11 12 10 2 1 Model UTG CCGFGA 02 2 2 Cassette grille optional part parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 19: ...Display panel assy 9 9375549015 Connector cover 10 9382862008 Intake grille assy 11 9375546014 Hook bracket 12 9375532031 Grille hook 13 9382863005 Intake grille 14 9375533014 Long life filter 15 9382821012 Decoration panel 16 9375745011 Motor holder assy A 17 9900139070 Step motor with hite connector 9711276001 ire with connector 2 1 Model UTG CCGFGA 02 3 2 Cassette grille optional part parts lis...

Page 20: ...UAS1 ACUH12LUAS1 and ACUH18LUAS1 Chassis and PC boards 13 18 17 19 1 12 11 10 14 16 15 a 3 9 5 7 8 6 4 2 3 1 Models ACUH09LUAS1 ACUH12LUAS1 and ACUH18LUAS1 02 4 3 Indoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 21: ...od 19 9377765024 Drain pan sub assy 9707449013 ire with connector CN11 on Main PCB Step motor 9711277008 ire with connector CN12 on Main PCB Step motor 9710177088 ire with connector CN46 on Main PCB Terminal Ex in 9711275004 ire with connector CN48 on Main PCB CN1 on Indicator PCB of optional Cassette grille 9710171000 ire with connector CN54 on Main PCB CN262 on Power supply PCB 9710172007 ire wi...

Page 22: ... Fan and evaporator 50 51 52 53 56 55 54 a b c f d e 3 1 Models ACUH09LUAS1 ACUH12LUAS1 and ACUH18LUAS1 02 6 3 Indoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 23: ...or sub assy 09 and 12 models 9375720339 Evaporator sub assy 18 model 55 9377764065 Insulation box sub assy 56 9377807014 Shaft cap a Top plate assy b Motor wire holder c Cabinet A sub assy d Separate wall e Evaporator holder f Cabinet B sub assy 3 1 Models ACUH09LUAS1 ACUH12LUAS1 and ACUH18LUAS1 02 7 3 Indoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 24: ... 4 1 Model AOUH09LUAS1 Exterior parts and chassis 3 1 2 13 15 19 20 18 22 23 24 16 21 8 4 9 10 14 11 12 17 a 7 5 6 4 1 Model AOUH09LUAS1 02 8 4 Outdoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 25: ...emp 11 9384912008 Heat sink 12 9900583019 Reactor assy 13 9322552259 Cabinet right assy 14 9384268006 Conduit cover 15 9322570055 Switch cover assy 16 9383720000 Drain cap assy 17 9322144003 Drain pipe 18 9323550025 Base assy 19 9317903011 Emblem 20 9322555199 Front panel assy 21 9384265005 Fan guard 22 9322136008 Propeller fan 23 9603553005 DC fan motor 24 9322553010 Motor bracket assy 9711555007...

Page 26: ... Compressor 50 51 52 53 54 55 a 56 b A A 60 59 58 57 4 1 Model AOUH09LUAS1 02 10 4 Outdoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 27: ...coil 54 9322463029 Pulse motor valve assy 55 9322474001 2 way valve assy 56 9322475008 3 way valve assy 57 9324024006 S insulator B 58 9322536020 S insulator F 59 9322537003 S insulator H 60 9323045002 S insulator V a Valve bracket b Muffler 4 1 Model AOUH09LUAS1 02 11 4 Outdoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 28: ...18LUAS1 Exterior parts and chassis 17 18 20 21 23 25 24 19 15 14 13 22 16 3 2 4 1 a 5 6 8 12 11 10 9 7 4 2 Models AOUH12LUAS1 and AOUH18LUAS1 02 12 4 Outdoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 29: ...assy Compressor temp 11 9900565060 Thermistor assy Outdoor temp 12 9322420046 Heat sink 13 9322552242 Cabinet right assy 14 9384276001 Conduit cover 15 9322570062 Switch cover assy 16 9810028006 Thermistor stopper 17 9383720000 Drain cap assy 18 9322144003 Drain pipe 19 9323550025 Base assy 20 9317903011 Emblem 21 9322555182 Front panel assy 22 9384273000 Fan Guard 23 9322150004 Propeller fan 24 9...

Page 30: ... Compressor A B 51 52 53 54 55 56 57 58 59 60 61 a b 50 A 4 2 Models AOUH12LUAS1 and AOUH18LUAS1 02 14 4 Outdoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 31: ...e motor valve assy 55 9322474001 2 way valve assy 56 9322850010 3 way valve assy 12 model 9387831016 3 way valve assy 18 model 57 9322824004 S insulator K 58 9323045002 S insulator V 59 9322501004 S insulator H 60 9322847003 S insulator F 61 9324014014 S insulator B a Valve bracket b Muffler 4 2 Models AOUH12LUAS1 and AOUH18LUAS1 02 15 4 Outdoor unit parts list TECHNICAL DATA AND PARTS LIST TECHNI...

Page 32: ...ation large 1 Special nut A large flange 4 Coupler heat insulation small 1 Special nut B small flange 4 Cable tie for electrical wiring 2 Drain hose Ø3 4 in I D Ø1 1 16 in O D 1 5 2 Outdoor unit Models AOUH09LUAS1 AOUH12LUAS1 and AOUH18LUAS1 Part name Exterior Q ty Part name Exterior Q ty Installation manual 1 Cable tie 2 Drain pipe 1 Drain cap 5 5 1 Indoor unit 02 16 5 Accessories TECHNICAL DATA ...

Page 33: ... and operation mode ire type Non polar 2 wire For Slim duct type only Simple remote controller UT RHR Compact remote controller concentrates on the basic functions such as Start Stop fan control and temperature setting ire type Non polar 2 wire ireless remote controller UT LNTU Unit control is performed by wireless remote controller NOTE Available functions may differ by the remote controller For ...

Page 34: ...r roof condition is expected to be the humidity of over 80 and the temperature of over 86 F 30 C External input and output PCB UT CS Use to connect with external devices and air conditioner PCB External input and output PCB box UTZ G EA For installing the External input and output PCB ireless LAN adapter UT TFS Z2 Remotely manage an air conditioning system using mobile devices such as smartphones ...

Page 35: ...ol Fujitsu General products using a third party thermostat controller External switch controller UT TER Air conditioner switching can be controlled by connecting other external sensor switches 6 1 Indoor unit 02 19 6 Optional parts TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 36: ... Heating ThD ThR ThPI ThO ThHO Thermistor Discharge temperature Thermistor Outdoor temperature Thermistor Heat exchanger out temperature ThD ThO ThHO Thermistor Room temperature Thermistor Pipe temperature ThR ThPI Muffler ThHM Thermistor Heat exchanger middle temperature ThHM 7 1 Models AOUH09LUAS1 02 20 7 Refrigerant system diagrams TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 37: ...tor ThPI ThC Thermistor Discharge temperature Thermistor Outdoor temperature Thermistor Heat exchanger out temperature ThD Thermistor Compressor temperature ThC ThO ThHO Thermistor Room temperature Thermistor Pipe temperature ThR ThPI ThHM Thermistor Heat exchanger middle temperature ThHM 7 2 Models AOUH12LUAS1 and AOUH18LUAS1 02 21 7 Refrigerant system diagrams TECHNICAL DATA AND PARTS LIST TECHN...

Page 38: ...8 Wiring diagrams 8 1 Indoor unit Models ACUH09LUAS1 ACUH12LUAS1 and ACUH18LUAS1 8 1 Indoor unit 02 22 8 iring diagrams TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 39: ...8 2 Outdoor unit Model AOUH09LUAS1 8 2 Outdoor unit 02 23 8 iring diagrams TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 40: ... Models AOUH12LUAS1 and AOUH18LUAS1 8 2 Outdoor unit 02 24 8 iring diagrams TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 41: ...E CN32 B03B PASK 1 WHITE CN71 B04B XASK 1 A WHITE CN9 B03B XARK 1 A RED UL1007 AWG24 BLACK UL1007 AWG24 BLACK FLOAT SWITCH THERMISTOR ROOM TEMP THERMISTOR PIPE MID TEMP BLACK BLACK GRAY GRAY Not used CN67 1 CN67 2 CN67 3 CN67 4 CN67 5 CN67 B05B PASK 1 WHITE Not used CN11 1 CN11 2 CN11 3 CN11 4 CN11 5 CN11 B05B XASK 1 A WHITE UL1061 AWG26 RED UL1061 AWG26 ORANGE UL1061 AWG26 YELLOW UL1061 AWG26 PIN...

Page 42: ...8 1 3 4 5 6 Pin No Terminal code Vm GND Vcc Vsp FG Function of terminal Revolution pulse output Speed control voltage input Control power voltage input GND Motor power voltage input Lead wire color Red Black White Yellow Brown 2 7 P650 DC Fan Motor MAIN PCB 09 model H09LBTA U A01 00 SV INVERTER ASSEMBLY 09 model EZ 0200WHUE 1 Red 3 Blue 1 Red 4 Orange 1 Red 5 Yellow 1 Red 6 White P30 Expansion Val...

Page 43: ...f terminal Revolution pulse output Speed control voltage input Control power voltage input GND Motor power voltage input Lead wire color Red Black White Yellow Brown 2 7 P650 DC Fan Motor MAIN PCB 12 model H12LBTA U A01 00 SV 18 model H18LBTA U A01 00 SV INVERTER ASSEMBLY 12 model EZ 0200HHUE 18 model EZ 0200YHUE 1 Red 3 Blue 1 Red 4 Orange 1 Red 5 Yellow 1 Red 6 White P30 Expansion Valve Coil 46 ...

Page 44: ...9 3 Models AOUH12LUAS1 and AOUH18LUAS1 02 28 9 PC board diagrams TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST ...

Page 45: ...3 TROUBLESHOOTING 2021 04 26 SR_CH03_AU021EF_01 ...

Page 46: ...it wired remote controller error 03 16 2 13 E 41 Room temperature sensor error Indoor unit 03 17 2 14 E 42 Indoor unit heat exchanger sensor error Indoor unit 03 18 2 15 E 51 Indoor unit fan motor error Indoor unit 03 19 2 16 E 53 Drain pump error Indoor unit 03 20 2 17 E 62 Outdoor unit main PCB error Outdoor unit 03 21 2 18 E 63 Inverter error Outdoor unit 03 22 2 19 E 64 PFC circuit error Outdo...

Page 47: ... 44 4 2 Inverter compressor 03 45 4 3 Outdoor unit Electronic Expansion Valve EEV 03 48 4 4 Indoor unit fan motor 03 50 4 5 Outdoor unit fan motor 03 51 5 Thermistor resistance values 03 53 5 1 Indoor unit 03 53 5 2 Outdoor unit 03 54 CONTENTS continued ...

Page 48: ......

Page 49: ...ized error is only displayed during the 3 min utes ST state period Start the operation and then press the TEST RUN button on the remote controller Press the MANUAL AUTO button on the indoor unit for 10 seconds or more Error memory display 2 minutes 20 seconds Starting operation and then Press TEST RUN button on the remote controller or Press MANUAL AUTO button on the indoor unit for 10 seconds or ...

Page 50: ...door unit 35 E 39 Indoor unit power supply error for fan motor Indoor unit 39 E 3A Indoor unit communication circuit wired remote controller error 3A E 41 Room temperature sensor error Indoor unit 41 E 42 Indoor unit heat exchanger sensor error Indoor unit 42 E 51 Indoor unit fan motor error Indoor unit 51 E 53 Drain pump error Indoor unit 53 E 62 Outdoor unit main PCB error Outdoor unit 62 E 63 I...

Page 51: ... Reset the power and operate Does error indication show again If no go to Check point 1 2 Check point 2 Check connection Check any loose or removed connection line of indoor unit and outdoor unit Check connection condition is control unit If there is loose connector open cable or mis wiring If there is an abnormal condition correct it by referring to the installation manual or the DESIGN TECHNICAL...

Page 52: ...44 If outdoor fan motor is abnormal replace outdoor unit fan motor and main PCB If the checked parts are normal replace the main PCB 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 Se...

Page 53: ...o Check point 1 2 Check point 2 Check connection Check any loose or removed connection line of indoor unit and outdoor unit If there is an abnormal condition correct it by referring to the installation manual or the DESIGN TECHNICAL MANUAL Check connection condition is control unit If there is loose connector open cable or mis wiring Check point 3 Check the voltage of power supply Check the voltag...

Page 54: ...f it is abnormal replace main PCB End Check point 1 2 Check external cause such as noise Check if the ground connection is proper Check if there is any equipment that causes harmonic wave near the power cable Neon light bulb or any electronic equipment which causes harmonic wave End 2 2 E 11 Serial communication error Serial forward transfer error Indoor unit 03 6 2 Troubleshooting with error code...

Page 55: ...r and main PCB If it is DC 12 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 Check voltage at CN14 terminal 1 3 terminal 1 2 of main PCB Power supply to the remote controller Upon correcting the removed connec tor or mis wiring reset the power End Check Point 2 ire installation wrong r...

Page 56: ...ain PCB to the external input and out put 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 chan...

Page 57: ...i type Forecast of cause Incorrect indoor unit is selected Check point 1 Check the type of indoor unit Check the type of the connected indoor unit If there is an abnormal condition correct it by refer to the installation manual or the DESIGN TECHNICAL MANAL Check point 2 Replace main PCB If check point 1 do not improve the symptom replace main PCB of the outdoor unit End 2 5 E 23 Combination error...

Page 58: ...roller group For installation method refer to in stallation manual If there is an abnormal condition correct it by refer to the installation manual or the DESIGN TECHNICAL MANUAL Check point 2 rong remote controller group setting The given address number by auto setting 00 and the manual set number except 00 are not existing in one remote controller group The remote controller address setting by U...

Page 59: ...r remote controller in remote controller group Indoor unit main PCB failure Check point 1 ire installation rong number of connected indoor unit If there is an abnormal condition correct it by refer to the installation manual or the DESIGN TECHNICAL MANUAL Check point 2 Check indoor unit main PCB Check if main PCB is damaged Change main PCB and check the error after setting remote controller addres...

Page 60: ...k point 3 Replace main PCB Change main PCB End Check point 1 2 Check external cause such as noise Check if the ground connection is proper Check if there is any equipment that causes harmonic wave near the power cable Neon light bulb or any electronic equipment which causes harmonic wave End NOTE EEPROM EEPROM Electronically Erasable and Programmable Read Only Memory is a non volatile memory which...

Page 61: ...ng is abnormal replace it Check point 2 Check ambient temperature around the motor Check excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation Check point 3 Check indoor unit fan motor Check indoor unit fan motor Refer to indoor unit fan motor in Service parts information on page 03 44 If indoor unit ...

Page 62: ... Controller PCB and indicator PCB failure Check point 1 Check the MANUAL AUTO but ton If MANUAL AUTO button is disabled on off switching replace it 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 2 10 E 35 MANUAL AUTO but...

Page 63: ... there is a defective contact or leak current in the power sup ply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check point 2 Check connection of Connector Check if connector is removed Check erroneous connection Check if cable is open Upon correcting th...

Page 64: ...n PCB defective Check point 1 Check the connection of terminal After turning off the power supply check and correct the followings Indoor unit Check the connection the communication PCB and the main PCB Check Point 2 Replace the communication PCB If the Check point 1 is ok replace the communication PCB Check Point 3 Replace the main PCB If condition is doesn t change replace the main PCB End 2 12 ...

Page 65: ...onnector 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 53 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 thermis tor DC 5 0 V N...

Page 66: ...o removed connector or incorrect wiring Check point 2 Remove connector and check thermistor resistance value For the heat exchanger thermistor resistance value refer to Thermistor resis tance values on page 03 53 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 ...

Page 67: ...n is caught dropped off or locked motor If fan or bearing is abnormal replace it Check point 2 Check ambient temperature around motor Check excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation Check point 3 Check indoor unit fan motor Check Indoor unit fan motor Refer to indoor unit fan motor in Serv...

Page 68: ... ON OFF switching operation by using a meter If float switch is abnormal replace it Check point 2 Check connector and wire Check loose contact of CN9 and shorted wire pinched wire Replace float switch if the wire is abnormal Check point 3 Check drain hose Check drain hose If there is hose clogging Please clear the clog Check point 4 Replace drain pump If check point 1 to 3 do not improve the sympt...

Page 69: ...k point 1 Reset power supply and operate If no go to Check point 1 2 Does error indication show again Check point 2 Replace main PCB Change main PCB End Check point 1 2 Check external cause Check if temporary voltage drop was not generated Check if momentary open was not generat ed Check if ground is connection correctly or there are no related cables near the power line End 2 17 E 62 Outdoor unit...

Page 70: ...point 1 2 Error displayed again 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 End Check point 1 2 Check external cause Check if temporary voltage drop was not generated Check if momentary open was not generated Check if ground is connection correctly or there are no re...

Page 71: ...us in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power sup ply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check point 2 Check connection of Connector Check if connector is removed Check erroneo...

Page 72: ...outdoor unit electrical components Check if the terminal connection is loose Check if connector is removed Check erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Check point 2 Check outdoor fan and heat exchanger Is there anything obstructing the air distribution circuit Is there any clogging of outdoor heat exchanger Is the fan rotati...

Page 73: ...to inverter compressor in Service parts information Check point 5 Replace main PCB If Check point 1 to 4 do not improve the symptom change main PCB End 2 20 E 65 IPM error Outdoor unit 03 25 2 Troubleshooting with error code TROUBLESHOOTING TROUBLESHOOTING ...

Page 74: ...einstalling 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 53 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 t...

Page 75: ...talling 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 53 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 chec...

Page 76: ...ling 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 53 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 ...

Page 77: ...r or mis wiring reset the power 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 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 th...

Page 78: ...ent temperature Main PCB failure Inverter compressor failure lock winding short 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...

Page 79: ...Check point 1 Check Noise from Compressor Turn on Power and check operation noise If an abnormal noise show replace compres sor 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 44 Upon correcting the ...

Page 80: ...eck point 2 Check ambient temperature around motor Check excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation Check point 3 Check outdoor unit fan motor Check outdoor unit fan motor Refer to outdoor unit fan motor in Service parts information on page 03 44 If outdoor unit fan motor is abnormal replac...

Page 81: ...ature thermistor 4 way valve Forecast of cause Connector connection failure Thermistor failure Coil failure 4 way valve failure Main PCB failure 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 ...

Page 82: ...temperature difference If the value location is not proper replace 4 way valve Check point 4 Check the voltage of 4 way valve Check the voltage P60 of Main PCB Check if AC 198 V AC 220 V 10 to AC 264 V AC 240 V 10 appears at P60 of Main PCB Heating operation If it is not voltage Replace Main PCB Cooling operation If it is voltage Replace Main PCB Check point 5 Replace main PCB If Check Point 1 to ...

Page 83: ...y valve For heating operation check liquid side of the 3 way valve Check point 2 Check the electronic expansion valve EEV and strainer Check if EEV open Refer to outdoor unit Electronic Expansion Valve EEV in Service parts information on page 03 44 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 ...

Page 84: ...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 2 29 E A1 Discharge temperature error Outdoor unit 03 36 2 Troubleshooting with error code TROUBLESHOOTING TROUBLESHOOTING ...

Page 85: ...er sup ply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check point 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 fi...

Page 86: ...ausing 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 termina...

Page 87: ...p 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 sup ply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check point 3 Check wired remote contr...

Page 88: ...ation condition Check connection pipe specified pipe length and pipe diameter Check any loose or removed communication line If there is an abnormal condition correct it by referring to the installation manual or the DESIGN TECHNICAL MANUAL Check point 5 Check Refrigeration cycle Check if strainer is clogged Refer to the figure below Measure gas pressure and if there is a leakage correct it Check t...

Page 89: ...nd outlet as shown be low Pipe In Pipe Out If there is a difference like shown below there is a possibility of inside clogged In this case re place the strainer Pipe In Pipe Out 3 4 No cooling No heating 03 41 3 Troubleshooting without error code TROUBLESHOOTING TROUBLESHOOTING ...

Page 90: ...grille and front panel normal Is main unit installed in stable condi tion 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 Is fan broken or deformed Is the screw of fan loose Is there any object which obstruct the fan rotation End Check if vibration noise by loose bolt or contact noise of piping is happening Is ...

Page 91: ... in stable condi tion Is main unit broken or deformed at the time of transportation or maintenance Is the filter clogged Is drain hose connection loose Is there a trap in drain hose Is drain hose clogged Check gas pressure and cor rect it if there was a gas leak MPa MPa Is fan rotating End End 3 6 ater leaking 03 43 3 Troubleshooting without error code TROUBLESHOOTING TROUBLESHOOTING ...

Page 92: ...defect of compressor is con sidered Locked compressor due to clogged dirt or less oil Is gas pipe valve open Low pressure is too low Defective compressor can be considered due to inside dirt clogging or broken component Replace compressor Check if refrigerant is leaking MPa MPa Replace compressor End Check if strainer is clogged Refer to outdoor EEV in this chapter End Check main PCB connection of...

Page 93: ...ion of main PCB loose or incorrect wiring Main PCB W402 W Compressor BLACK WHITE RED W400 U W401 V Check point 2 Check winding resistance Check winding resistance of each terminal Resistance value 1 975 7 Ω at 77 F 25 C R U C W S V RED WHITE BLACK If the resistance value is 0 Ω or infinite replace compressor 4 2 Inverter compressor 03 45 4 Service parts information TROUBLESHOOTING TROUBLESHOOTING ...

Page 94: ...Check point 3 Replace inverter PCB If check point 1 to 2 do not improve the symptom replace main PCB 4 2 Inverter compressor 03 46 4 Service parts information TROUBLESHOOTING TROUBLESHOOTING ...

Page 95: ...ed Check point 2 Check winding resistance Check winding resistance of each terminal Resistance value 1 916 8 Ω at 68 F 20 C C S R If the resistance value is 0 Ω or infinite replace compressor Check point 3 Replace inverter PCB If check point 1 to 2 do not improve the symptom replace main PCB 4 2 Inverter compressor 03 47 4 Service parts information TROUBLESHOOTING TROUBLESHOOTING ...

Page 96: ...abnormal replace EEV Check point 3 Check voltage from main PCB Remove connector and check voltage DC 12 V If it does not appear replace main PCB Check point 4 Check noise at start up Turn on the power and check the operation noise If an abnormal noise does not show replace main PCB Check point 5 Check opening and closing operation of valve hen valve is closed it has a temp difference between inlet...

Page 97: ...let and outlet as shown be low Pipe In Pipe Out If there is a difference like shown below there is a possibility of inside clogged In this case replace the strainer Pipe In Pipe Out 4 3 Outdoor unit Electronic Expansion Valve EEV 03 49 4 Service parts information TROUBLESHOOTING TROUBLESHOOTING ...

Page 98: ...or fan motor Refer to below Circuit test Vm and GND terminal NOTE Vm DC voltage GND Earth terminal If they are short circuited below 300 kΩ replace indoor fan motor and controller PCB Pin number wire color Terminal function symbol 1 Red DC voltage Vm 2 No function 3 Black Ground terminal GND 4 hite Control voltage Vcc 5 No function 6 No function 7 ellow Speed command Vsp 8 Brown Feed back FG 4 4 I...

Page 99: ...motor Refer to below Circuit test Vm and GND terminal NOTE Vm DC voltage GND Earth terminal If they are short circuited below 300 kΩ replace outdoor fan motor and controller PCB Pin number wire color Terminal function symbol 1 Red DC voltage Vm 2 No function 3 No function 4 Black Earth terminal GND 5 hite Control voltage Vcc 6 ellow Speed command Vsp 7 Brown Feed back FG 4 5 Outdoor unit fan motor...

Page 100: ...rcuit test Vm and GND terminal NOTE Vm DC voltage GND Earth terminal If they are short circuited below 300 kΩ replace outdoor fan motor and main PCB 1 4 5 6 7 Red Black White Yellow Brown FM Pin number wire color Terminal function symbol 1 Red DC voltage Vm 2 No function 3 No function 4 Black Earth terminal GND 5 hite Control voltage Vcc 6 ellow Speed command Vsp 7 Brown Feed back FG 4 5 Outdoor u...

Page 101: ...temperature thermistor Temperature F C Resistance kΩ Voltage V 22 0 30 0 1 131 91 0 21 13 0 25 0 804 52 0 29 4 0 20 0 579 59 0 40 5 0 15 0 422 89 0 53 14 0 10 0 312 27 0 69 23 0 5 0 233 21 0 88 32 0 0 0 176 03 1 10 41 0 5 0 134 23 1 36 50 0 10 0 103 34 1 63 59 0 15 0 80 28 1 92 68 0 20 0 62 91 2 21 77 0 25 0 49 70 2 51 86 0 30 0 39 57 2 79 95 0 35 0 31 74 3 06 104 0 40 0 25 64 3 30 113 0 45 0 20 8...

Page 102: ... 0 86 77 0 25 0 49 84 1 03 86 0 30 0 40 01 1 23 95 0 35 0 32 35 1 43 104 0 40 0 26 34 1 65 113 0 45 0 21 58 1 88 122 0 50 0 17 79 2 11 131 0 55 0 14 75 2 34 140 0 60 0 12 30 2 57 149 0 65 0 10 32 2 79 158 0 70 0 8 69 3 00 167 0 75 0 7 36 3 19 176 0 80 0 6 27 3 37 185 0 85 0 5 36 3 54 194 0 90 0 4 60 3 69 203 0 95 0 3 96 3 83 212 0 100 0 3 43 3 96 221 0 105 0 2 98 4 07 230 0 110 0 2 60 4 17 239 0 1...

Page 103: ...7 0 25 0 49 84 1 03 86 0 30 0 40 01 1 23 95 0 35 0 32 35 1 43 104 0 40 0 26 34 1 65 113 0 45 0 21 58 1 88 122 0 50 0 17 79 2 11 131 0 55 0 14 75 2 34 140 0 60 0 12 30 2 57 149 0 65 0 10 32 2 79 158 0 70 0 8 70 3 00 167 0 75 0 7 36 3 19 176 0 80 0 6 27 3 37 185 0 85 0 5 36 3 54 194 0 90 0 4 60 3 69 203 0 95 0 3 96 3 83 212 0 100 0 3 43 3 96 221 0 105 0 2 98 4 07 230 0 110 0 2 60 4 17 239 0 115 0 2 ...

Page 104: ... 3 85 140 0 60 0 1 19 4 00 149 0 65 0 1 00 4 13 158 0 70 0 0 84 4 25 167 0 75 0 0 71 4 35 176 0 80 0 0 61 4 43 Outdoor temperature thermistor Temperature F C Resistance kΩ Voltage V 22 0 30 0 224 33 0 73 12 0 25 0 159 71 0 97 4 0 20 0 115 24 1 25 5 0 15 0 84 21 1 56 14 0 10 0 62 28 1 90 23 0 5 0 46 58 2 26 32 0 0 0 35 21 2 61 41 0 5 0 26 88 2 94 50 0 10 0 20 72 3 25 59 0 15 0 16 12 3 52 68 0 20 0 ...

Page 105: ...4 CONTROL AND FUNCTIONS 2021 04 26 SR_CH04_AU021EF_01 ...

Page 106: ...stopped 04 24 7 Various control 04 25 7 1 Auto restart 04 25 7 2 MIN HEAT operation 04 25 7 3 ECONOM operation 04 25 7 4 Fresh air control 04 26 7 5 Compressor preheating 04 26 7 6 External electrical heater control 04 27 7 7 Electronic expansion valve control 04 27 7 8 Drain pump control 04 28 7 9 Prevention to restart for 3 minutes 3 minutes st 04 29 7 10 4 way valve control 04 29 7 11 Unit stat...

Page 107: ...perature is 2 F 1 0 C lower than a set temperature the compressor will be stopped hen the room temperature is within the range of 11 F 6 0 C to 2 F 1 0 C of the setting temperature the compressor frequency is controlled within the range shown in the table below However the maximum frequency is limited in the range shown in the figure below based on the indoor fan mode and the outdoor temperature C...

Page 108: ... unit fan mode HIGH MED LOW QUIET ACUH09LUAS1 A zone 72 44 38 28 B zone 72 44 38 28 C zone 54 44 38 28 D zone 40 34 30 22 E zone 40 34 30 22 F zone 40 34 30 22 ACUH12LUAS1 A zone 102 46 36 26 B zone 102 46 36 26 C zone 58 46 36 26 D zone 39 32 28 20 E zone 39 32 28 20 F zone 39 32 28 20 ACUH18LUAS1 A zone 102 46 36 26 B zone 102 46 36 26 C zone 58 36 32 26 D zone 39 32 28 20 E zone 39 32 28 20 F z...

Page 109: ...e range shown below Compressor frequency range Unit rps Model name Minimum frequency Maximum frequency ACUH09LUAS1 12 110 ACUH12LUAS1 ACUH18LUAS1 8 130 Limit of maximum speed based on outdoor temperature In heating operation maximum frequency is defined by outdoor temperature and fan mode A zone B zone 57 2 F 14 C C zone 14 0 F 10 C Outdoor temperature rises Outdoor temperature drops 53 6 F 12 C 1...

Page 110: ...emperature Compressor frequency range Unit rps Model name Outdoor temperature zone Operating frequency ACUH09LUAS1 zone 28 J zone 28 zone 0 ACUH12LUAS1 ACUH18LUAS1 zone 26 J zone 26 zone 0 Compressor control based on room temperature Ts 1 F Ts 0 5 C Ts 3 F Ts 1 5 C Ts 3 F Ts 1 5 C X zone J zone Y zone Room temperature drops Room temperature rises Ts Set temperature Ts 1 F Ts 0 5 C 1 3 Dry operatio...

Page 111: ... 56 68 77 84 93 103 Time sec 1 2 3 4 5 6 7 60 140 170 220 280 360 430 Models AOUH12LUAS1 and AOUH18LUAS1 Compressor frequency soon after starting is controlled as below Frequency I Frequency II Frequency III Frequency IV Frequency V Frequency VI Time 1 Time 2 Time 3 Time 4 Time 5 Time 6 Frequency rps I II III IV V VI 35 52 64 71 89 97 Time sec 1 2 3 4 5 6 60 140 170 200 350 410 1 4 Compressor freq...

Page 112: ...emperature zone Limitation of compressor frequency AOUH09LUAS1 A zone 35 rps B zone 35 rps C zone 35 rps D zone 15 rps E zone 15 rps F zone 36 rps AOUH12LUAS1 A zone 37 rps B zone 37 rps C zone 37 rps D zone 28 rps E zone 1 rps F zone 22 rps AOUH18LUAS1 A zone 33 rps B zone 33 rps C zone 33 rps D zone 25 rps E zone 10 rps F zone 20 rps 1 5 Compressor frequency limitation by outdoor temperature 04 ...

Page 113: ...7 rps B zone 37 rps C zone 36 rps D zone 15 rps E zone 15 rps F zone 1 rps AOUH12LUAS1 A zone 34 rps B zone 34 rps C zone 34 rps D zone 15 rps E zone 14 rps F zone 14 rps AOUH18LUAS1 A zone 30 rps B zone 30 rps C zone 30 rps D zone 13 rps E zone 10 rps F zone 10 rps 1 5 Compressor frequency limitation by outdoor temperature 04 7 1 Compressor frequency control CONTROL AND FUNCTIONS CONTROL AND FUNC...

Page 114: ...on mode is middle zone indoor unit operation mode is selected as below Same operation mode is selected as outdoor unit If outdoor unit is operating in cooling and heating mode indoor unit will be operated by the same operation mode Selected by outdoor temperature If outdoor unit is operating in other than cooling and heating mode indoor unit will be op erated according to the outdoor temperature a...

Page 115: ...n Middle zone Operation mode of outdoor unit Cooling Outdoor temp 77 0 F 25 C Operation mode before the monitor mode is cooling mode Monitor mode Room temp Ts 3 6 F 2 C No Yes No Yes No Yes No Yes No No Operation mode of outdoor unit Heating Yes Yes No System stops or operation command other than auto changeover operation Yes No Yes No Thermostat remains in off state for 6 minutes or longer Yes No...

Page 116: ...ode only Fan operation Airflow can be switched in 5 steps such as AUTO QUIET LO MED HIGH while indoor unit fan only runs hen fan mode is set at AUTO it operates on MED fan speed Cooling operation Switch the airflow AUTO and indoor fan motor will run according to room temperature as below On the other hand if switched in HIGH QUIET indoor motor will run at a constant airflow of COOL operation modes...

Page 117: ... value of the indoor fan speed is set as shown below based on the detected tempera ture by the indoor heat exchanger sensor on heating mode Normal operation 98 6 F 37 C 89 6 F 32 C 75 2 F 24 C 93 2 F 34 C 86 0 F 30 C 98 6 F 37 C 102 2 F 39 C 107 6 F 42 C Indoor heat exchanger temperature rises Setting fan mode Cool air prevention S LOW Indoor heat exchanger temperature drops MED or setting fan mod...

Page 118: ...Moisture return prevention control cooling and dry mode Switch the airflow AUTO at cooling mode and the indoor fan motor will run as shown below Compressor On Off Indoor fan setting airflow S LOW Off 10 30 60 180 60 180 60 10 30 sec Indoor fan speed 3 1 Indoor fan control 04 12 3 Fan control CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS ...

Page 119: ...p Cooling Heating Dry Cooling or dry at low outdoor temp Y zone Y zone Z zone F zone G zone H zone S HIGH2 1 120 S HIGH1 990 1 120 HIGH 990 1 120 10 1 120 9 990 1 120 990 390 320 240 240 8 940 1 120 940 390 320 240 240 7 810 940 810 390 320 240 240 6 810 810 810 300 240 200 200 5 810 690 810 250 240 200 200 4 790 630 790 250 240 200 200 3 710 570 710 250 240 200 200 2 660 570 660 250 240 200 200 1...

Page 120: ...zone F zone G zone H zone S HIGH2 1 100 S HIGH1 1 050 1 100 HIGH 1 050 1 100 10 1 100 9 1 050 1 100 1 050 850 320 270 270 8 810 870 810 850 320 270 270 7 810 760 810 770 320 270 270 6 560 760 560 630 270 230 230 5 560 680 560 440 270 230 230 4 440 530 440 320 270 230 230 3 440 500 440 320 270 230 230 2 440 420 440 320 270 230 230 1 440 420 440 320 270 230 230 NOTE After defrost control on the heat...

Page 121: ...zone F zone G zone H zone S HIGH2 1 100 S HIGH1 1 050 1 100 HIGH 1 050 1 100 10 1 100 9 1 050 1 100 1 050 850 320 270 270 8 950 990 950 850 320 270 270 7 850 920 850 770 320 270 270 6 690 710 690 630 270 230 230 5 560 620 560 440 270 230 230 4 440 560 440 320 270 230 230 3 440 500 440 320 270 230 230 2 440 440 440 320 270 230 230 1 440 440 440 320 270 230 230 NOTE After defrost control on the heat...

Page 122: ...is function is only available by 2 wire remote controller NOTE hen the 2 wire remote controller is disconnected clear the individual setting Otherwise this setting can t change 4 2 All louver control All louver operation hen the mode is selected the standard louver position of the each mode is set Operation mode Standard Position Cooling 1 Dry 1 Heating 4 Monitor 1 NOTES Setting of the wireless re...

Page 123: ...flow direction louver starts to swing Swinging range Cooling mode dry mode fan mode 1 4 Heating mode 1 4 hen the indoor fan is S LO or stop mode the swing operation is interrupted and it stops at either upper end or bottom end 4 3 Swing operation 04 17 4 Louver control CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS ...

Page 124: ...mer The program timer allows the off timer and the on timer to be used in combination one time Operation mode Stop mode Stop mode Stop mode Operation mode Operation mode Set time Set time Set time Set time Operation will start from the timer setting either off timer and on timer whichever is closest to the clock current timer setting The order of operations is indicated by the allow in the remote ...

Page 125: ...ing temperature is not changed and the operation is stopped at the setting time Set temperature rises Ts Set temperature Stop of operation Ts 3 6 F 2 C Set 60 min 1 8 F 1 C In the heating operation mode hen the sleep timer is set the setting temperature is decreased 1 8 F 1 C It decreases the setting temperature another 1 8 F 1 C every 30 minutes Upon lowering 7 2 F 4 C the setting temperature is ...

Page 126: ...mer The program timer allows the off timer and the on timer to be used in combination one time Operation mode Stop mode Stop mode Stop mode Operation mode Operation mode Set time Set time Set time Set time Operation will start from the timer setting either off timer and on timer whichever is closest to the clock current timer setting The order of operations is indicated by the allow in the remote ...

Page 127: ... 3 6 F 2 C Set 60 min 1 8 F 1 C In the heating operation mode hen the sleep timer is set the setting temperature is decreased 1 8 F 1 C It decreases the setting temperature another 1 8 F 1 C every 30 minutes Upon lowering 7 2 F 4 C the setting temperature is not changed and the operation is stopped at the setting time Set Ts 3 6 F 2 C 1 8 F 1 C 5 4 F 3 C 7 2 F 4 C Ts Set temperature 30 min 30 min ...

Page 128: ...um of 64 F 18 C even if the SET BACK temperature is set to 63 F 17 C or lower Case of SET BACK timer on the Cooling operation Setting temperature 72 F 22 C SET BACK temperature 78 F 26 C SET BACK setting Operation temperature Operation temperature 1 ON OFF OFF ON 1 During the SET BACK function the setting temperature is changed Chenge the setting temperature 72 F 22 C 75 F 24 C 72 F 22 C 78 F 26 C...

Page 129: ...r Compressor integrating operation time Less than 40 min More than 40 min Condition Does not operate Tn Tn10 9 0 F 5 C Tn 21 2 F 6 C Tn Tnb 3 6 F 2 C Tn 21 2 F 6 C Tn 1 4 F 17 C Ta 14 0 F 10 C Tn 19 4 F 7 C or Tn 13 0 F 25 C Ta 14 0 F 10 C Integrating defrost Constant monitoring Compressor integrating operation time More than 240 min For long continuous operation More than 213 min For long continu...

Page 130: ...of the conditions below is satisfied Outdoor unit heat exchanger temperature after 1 minute or later since compressor start 09 model 60 8 F 16 C or more 12 18 model 55 4 F 13 C or more Compressor operation time 15 minutes 6 1 Defrost operation in heating operation stopped If the outdoor unit is frosted when stopping the heating operation it stops after performing the auto matic defrosting operatio...

Page 131: ...w direction setting Swing ECONOM operation MIN HEAT operation 7 2 MIN HEAT operation MIN HEAT operation performs as below setting when pressing MIN HEAT button Operation mode Heating Setting temperature 50 F 10 C Fan mode AUTO LED display Economy Defrost operation Operate as normal 7 3 ECONOMY operation The ECONOM operation starts by pressing ECONOM button on the remote controller The ECONOM opera...

Page 132: ...sor preheating By preheating the compressor warm airflow is quickly discharged when the operation is started Triggering condition 30 minutes after compressor stopped Outdoor unit heat exchanger temperature Tn Off On Tn Tn 28 4 F 2 C 24 8 F 4 C hen the jumper wire JM2 is disconnected 41 0 F 5 C Off On Tn Tn 44 6 F 7 C 7 4 Fresh air control 04 26 7 Various control CONTROL AND FUNCTIONS CONTROL AND F...

Page 133: ...or fan operates However S LO is exclud ed 7 7 Electronic expansion valve control The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the table below Operation mode Pulse range Cooling dry mode Between 52 and 480 pulses Heating mode NOTE At the time of supplying the power to the outdoor unit the initialization of the ...

Page 134: ... and outdoor fan motor operation are stopped Drain pump operates continuously for 3 minutes after the float switch is turned off and then drain pump is turned off hen the float switch turns on continuously for 3 minutes failure indication operates It is necessary to turn off power for release it hen the float switch turns off less than 3 minutes the unit starts cooling operation Indoor fan motor s...

Page 135: ...witch is turned off and then drain pump is turned off 7 9 Prevention to restart for 3 minutes 3 minutes st hen the compressor fails to start for the number of times below it does not enter operation status for 3 minutes Retry number 50 Retry set number 3 hen the compressor fails to start in the retry set number above the compressor is stopped 7 10 4 way valve control If heating mode is selected at...

Page 136: ...n Off 08 On Off 0 Off 1 On hen the water level rises 00 052 Drain pump On Off 08 On Off 0 Off 1 On 00 080 Indoor unit total energized hours 11 h 00 081 Total filtering hours 11 h 00 082 Indoor unit fan total operation hours 11 h 00 140 Operation or Stop External input 00 0 Off 1 On hen the function setting 46 is not set NOTE Available only for external input port of the indoor unit 00 142 Forced s...

Page 137: ...0 Off 1 On NOTE The value is output even if the function setting or rotary switch is not set 01 Outdoor unit 01 000 Outdoor temp 01 F or C 01 001 Discharge temp 01 F or C 01 003 Heat exchanger middle temp 01 F or C 01 004 Heat exchanger outlet temp 01 F or C 01 007 Compressor temp 01 F or C 01 050 Fan 1 rotation number 03 rpm 01 055 Compressor rotation number 04 rps 01 060 Expansion valve Upstream...

Page 138: ...tarts blinking Trigger condition 219 2 F 104 C Compressor frequency 20 rps 120 seconds Release condition 213 8 F 101 C Compressor protection temperature 230 0 F 110 C 8 2 Anti freezing control cooling and dry mode The compressor frequency is decrease in cooling and dry mode when the indoor unit heat exchang er temperature sensor detects the temperature lower than the trigger condition hen the indo...

Page 139: ...tion mode Outdoor temp Ta Trigger condition Release condition Cooling 122 0 F 50 C Ta 4 5 A 4 0 A 114 8 F 46 C Ta 122 0 F 50 C 4 5 A 4 0 A 104 0 F 40 C Ta 114 8 F 46 C 6 0 A 5 5 A 53 6 F 12 C Ta 104 0 F 40 C 8 5 A 8 0 A 35 6 F 2 C Ta 53 6 F 12 C 8 5 A 8 0 A Ta 35 6 F 2 C 8 5 A 8 0 A Heating 62 6 F 17 C Ta 7 0 A 6 5 A 53 6 F 12 C Ta 62 6 F 17 C 9 0 A 8 5 A 41 0 F 5 C Ta 53 6 F 12 C 10 0 A 9 5 A Ta ...

Page 140: ...peration Fan stop 40 seconds when IPM trip protection works Fan stop 50 seconds when corrent overload protection works 8 5 Compressor temperature protection for 12 18 model hen the compressor temperature sensor detects higher than the trigger condition below the com pressor is stopped hen the compressor temperature sensor detects the release condition the pro tection is released Trigger condition ...

Page 141: ...c Zone C 5 rps 60 sec Zone D The protection is released and the operation is returned to normal mode Zone E Heating mode Indoor unit heat exchanger temperature rises Indoor unit heat exchanger temperature drops Stable zone AB BC CD DE Zone A Zone B Zone C Zone D Zone E AB 141 8 F 61 C BC 131 0 F 55 C CD 127 4 F 53 C DE 122 0 F 50 C Zone Operation Zone A Compressor is stopped Zone B The compressor ...

Page 142: ...8 7 High temperature and high pressure release control 04 36 8 Various protections CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS ...

Page 143: ...5 FILED WORKING 2021 04 26 SR_CH05_AU021EF_01 ...

Page 144: ...CONTENTS 5 FILED WORKING 1 Function settings 05 1 1 1 Function settings on indoor unit 05 1 1 2 Function settings by using remote controller 05 2 ...

Page 145: ...ction 1 1 Function settings on indoor unit By using some components on the PCB you can change the function settings Component location Components on the indoor unit main PCB used for the function settings are located as shown in the following figure SW101 1 2 3 DIP switch setting SW101 Setting change prohibited 1 1 Function settings on indoor unit 05 1 1 Function settings FIELD WORKING FIELD WORKI...

Page 146: ... control for wired remote controller sensor 6 40 Auto restart 7 42 Room temperature sensor switching 8 44 Remote controller custom code 9 46 External input control 10 48 Room temperature sensor switching Aux 11 49 Indoor unit fan control for energy saving for cooling 12 60 Switching functions for external output terminal 13 61 Control switching of external heaters 14 62 Operating temperature switc...

Page 147: ...nvironment correction of the room temperature sensor may be re quired Select the appropriate control setting according to the installed environment The temperature of the room temperature sensor is corrected as follows Corrected temp Temp of the room temp sensor Correction temp value Example of correction hen the temperature of the room temp sensor is 78 F and the setting value is 03 2 F the corre...

Page 148: ...5 6 F 3 0 C 16 7 F 3 5 C 17 8 F 4 0 C 6 Auto restart Enables or disables automatic restart after a power interruption Function number Setting value Setting description Factory setting 40 00 Enable 01 Disable NOTE Auto restart is an emergency function such as for power outage etc Do not attempt to use this function in normal operation Be sure to operate the unit by remote controller or exter nal de...

Page 149: ...scription Factory setting 48 00 Both 01 ired remote controller 11 Indoor unit fan control for energy saving for cooling Enables or disables the power saving function by controlling the indoor unit fan rotation when the outdoor unit is stopped during cooling operation Function number Setting value Setting description Factory setting 49 00 Disable 01 Enable 02 Remote controller 00 hen the outdoor un...

Page 150: ...For details refer to External heater output in Chapter 0 1 Details of function on page 1 Function number Setting value Setting description Factory setting 61 00 Auxiliary heater control 1 01 Auxiliary heater control 2 02 Heat pump prohibition control 03 Auxiliary heater control by outdoor temperature 1 04 Auxiliary heater control by outdoor temperature 2 05 Auxiliary heater control by outdoor temp...

Page 151: ...C 0 F 0 C 10 7 2 F 4 C 0 9 F 0 5 C 7 2 F 4 C 0 F 0 C 11 9 0 F 5 C 0 9 F 0 5 C 9 0 F 5 C 0 F 0 C 12 5 4 F 3 C 0 F 0 C 0 9 F 0 5 C 0 9 F 0 5 C 13 3 6 F 2 C 0 F 0 C 1 8 F 1 C 0 9 F 0 5 C 14 3 6 F 2 C 0 F 0 C 3 6 F 2 C 0 9 F 0 5 C 15 5 4 F 3 C 0 F 0 C 5 4 F 3 C 0 9 F 0 5 C 16 7 2 F 4 C 0 F 0 C 7 2 F 4 C 0 9 F 0 5 C 17 9 0 F 5 C 0 F 0 C 9 0 F 5 C 0 9 F 0 5 C 15 Outdoor temperature zone boundary tempera...

Page 152: ...e standby time until the auxiliary equipment operation starts during primary equipment opera tion For details refer to Chapter 0 1 Details of function on page 1 Function number Setting value Setting description Factory setting 71 00 Disable 01 1 minute 02 2 minutes 98 98 minutes 99 99 minutes 18 Heat pump backup setting Enables or disables the heat pump backup instruction from the outdoor unit Thi...

Page 153: ...e in defrosting NOTE Inappropriate heater selection may cause cold air in defrosting Function number Setting value Setting description Factory setting 75 00 Disable 01 Enable 1 2 Function settings by using remote controller 05 9 1 Function settings FIELD WORKING FIELD WORKING ...

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