Fujitsu AUUH18LUAS Service Manual
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Fujitsu AUUH18LUAS Service Manual

Fujitsu AUUH18LUAS Service Manual

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AIR CONDITIONER
Cassette type
INDOOR
OUTDOOR
SERVICE MANUAL
AUUH18LUAS
AUUH24LUAS
AUUH30LUAS
AUUH36LUAS
AOUH18LUAS1
AOUH24LUAS1
AOUH30LUAS1
AOUH36LUAS1
SR_AU036EF_02
2023.04.25

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Summary of Contents for Fujitsu AUUH18LUAS

  • Page 1 AIR CONDITIONER Cassette type SERVICE MANUAL INDOOR AUUH18LUAS AUUH24LUAS AUUH30LUAS AUUH36LUAS OUTDOOR AOUH18LUAS1 AOUH24LUAS1 AOUH30LUAS1 AOUH36LUAS1 SR_AU036EF_02 2023.04.25...
  • Page 2 Mobile” is a trademark of FUJITSU GENERAL LIMITED. ™ Google Play is trademark of Google LLC. ® App Store is a service mark of Apple Inc., registered in the U.S. and other countries. Copyright © 2023 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 5 1. GENERAL INFORMATION 2023.04.25 SR_CH01_AU036EF_02...
  • Page 6 CONTENTS 1. GENERAL INFORMATION 1. Specifications....................01-1 1-1. Indoor unit ........................01-1 1-2. Outdoor unit........................01-5 2. Dimensions....................01-7 2-1. Indoor unit ........................01-7 2-2. Outdoor unit........................01-11...
  • Page 7 1. Specifications 1-1. Indoor unit Cassette Type Inverter, Heat pump Model name AUUH18LUAS AUUH24LUAS Power supply intake Outdoor unit Voltage 208/230 System power supply Frequency Available voltage range 187—253 Indoor unit power supply (from outdoor unit) 208/230 k→ 5.28 7.03...
  • Page 8 Cassette Type Inverter, Heat pump Model name AUUH18LUAS AUUH24LUAS Material Polystyrene →hite (UTG-GCGF) Enclosure Approximate color of Munsell N9.25/ Color Black (UTG-LCGVCB) Cassette grille Approximate color of Munsell N2 2-1/16 × 37-3/8 × 37-3/8 (53 × 950 × 950) Dimensions in (mm) (H ×...
  • Page 9 Cassette Type Inverter, Heat pump Model name AUUH30LUAS AUUH36LUAS Power supply intake Outdoor unit Voltage 208/230 System power supply Frequency Available voltage range 187—253 Indoor unit power supply (from outdoor unit) 208/230 k→ 8.79 10.55 Rated Btu/h 30,000 36,000 Cooling k→...
  • Page 10 Cassette Type Inverter, Heat pump Model name AUUH30LUAS AUUH36LUAS NOTES: • Specifications are based on the following conditions: – Cooling: Indoor temperature of 80°FDB/67°F→B (26.67°CDB/19.44°C→B), and outdoor temperature of 95°FDB/75°F→B (35°CDB/23.9°C→B). – Heating: Indoor temperature of 70°FDB/60°F→B (21.11°CDB/15.56°C→B), and outdoor temperature of 47°FDB/43°F→B (8.33°CDB/6.11°C→B). –...
  • Page 11 1-2. Outdoor unit Type Inverter, Heat pump Model name AOUH18LUAS1 AOUH24LUAS1 Power supply 208/230 V~ 60 Hz Power supply intake Outdoor unit Available voltage range 187—253 V Starting current 10.3 Cooling 1,395 (2,370) 2,187 (3,715) Airflow rate CFM (m Heating 1,460 (2,480) 2,187 (3,715) Type ×...
  • Page 12 Type Inverter, Heat pump Model name AOUH30LUAS1 AOUH36LUAS1 Power supply 208/230 V~ 60 Hz Power supply intake Outdoor unit Available voltage range 187—253 V Starting current 13.4 16.5 Cooling 2,301 (3,910) 2,502 (4,250) Airflow rate CFM (m Heating 2,219 (3,770) 2,431 (4,130) Type ×...
  • Page 13 2. Dimensions 2-1. Indoor unit ¢ Models: AUUH18LUAS and AUUH24LUAS Unit: in (mm) 31-5/16 (796) Hanging bolt position 37-3/8 (950) 13-7/16 (342) Drain hose View A 13-7/16 (342) 11-9/16 1-3/4 (293) (45) 1-9/16 (40) 5-8/16 Ceiling Wire hole (140) 3-15/16 (100)
  • Page 14 ¢ Models: AUUH30LUAS and AUUH36LUAS Unit: in (mm) 31-5/16 (796) Hanging bolt position 37-3/8 (950) 13-7/16 (342) Drain hose View A 13-7/16 (342) 11-9/16 1-3/4 1-9/16 (40) (293) (45) 5-8/16 (140) Ceiling Wire hole 9-5/16 3-15/16 (100) 3-15/16 (100) (237) 3-1/4 (83) 3-1/4 (83) Fresh air inlet (cut out)
  • Page 15 ¢ Installation space requirement Provide sufficient installation space for product safety. Unit: in (mm) Strong and durable ceiling 60 (1,500) or more 119 (3,000) or more Floor • H1: Minimum height from bottom of the product to ceiling AUUH18-24LUAS AUUH30-36LUAS 11 (256) 12 (298) •...
  • Page 16  Human Sensor (Option) NOTE: A separate device capable of controlling the human sensor (energy saving) function, such as the Touch Panel Controller, is required for use. Top view Drain Refrigerant pipe pipe Human sensor Example of sensitivity range: Unit: in (mm) 125 (3,200) 346 (8,800) 31 (800)
  • Page 17 2-2. Outdoor unit ¢ Model: AOUH18LUAS1 Unit: in (mm) 4-M10 hole 22-13/16 (580) 4-5/16 (109) Pitch of bolts for installation Top view 3/4 (19) 31-7/16 (799) 2-11/16 (68) 1/2 (13) 11-7/16 (290) 1-5/16 (33) 1-3/16 (30) Side view Front view Side view Airflow Hole...
  • Page 18 ¢ Model: AOUH24LUAS1 Unit: in (mm) 5-13/16 25-9/16 (650) 5-5/8 (147) (143) 3-way valve (Gas) 3-way valve (Liquid) 1-1/4 (48) Liquid Top view Detail A Detail B 12-5/8 (320) 37 (940) 1-9/16 (40) 9/16 (14) 2-Ф7/8 (22) Cable port 2-Ф7/8 (22) Cable port 2-Ф1/8 (28) Cable port...
  • Page 19 ¢ Models: AOUH30LUAS1 and AOUH36LUAS1 Unit: in (mm) 5-13/16 5-5/8 (147) 25-9/16 (650) (143) 1-7/8 (48) 1-3/8 (35.7) Top view 37 (940) 1-9/16 12-5/8 (320) 3/16 (40) 3-way valve (Liquid) 3-way valve (Gas) 2-Ф7/8 (22) 2-Ф7/8 (22) Cable port Cable port 2-Ф1/8 (28) Cable port 2-Ф1/8 (28)
  • Page 20 - (01-14) - 2-2. Outdoor unit 2. Dimensions...
  • Page 21 2. TECHNICAL DATA AND PARTS LIST 2023.04.25 SR_CH02_AU036EF_02...
  • Page 22 7-3. Models: AOUH30LUAS1 and AOUH36LUAS1.............02-32 8. Wiring diagrams ..................02-33 8-1. Indoor unit ........................02-33 8-2. Outdoor unit........................02-34 9. PC board diagrams ...................02-37 9-1. Models: AUUH18LUAS, AUUH24LUAS, AUUH30LUAS, and AUUH36LUAS (including UTG-GCGF)........................02-37 9-2. Model: AOUH18LUAS1 ....................02-38 9-3. Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 ........02-39...
  • Page 23 • Service parts information and design are subject to change without notice for product improve- ment. • 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) -...
  • Page 24 2. Cassette grille (optional part) parts list 2-1. Model: UTG-GCGF ¢ Overall - (02-2) - 2-1. Model: UTG-GCGF 2. Cassette grille (optional part) parts list...
  • Page 25 Item no. Part no. Part name Service part 9381355006 Panel insulator C ♦ 9381360000 Panel insulator B ♦ 9381352005 Decoration panel ♦ 9381712007 Motor case assy ♦ 9381357000 Shaft cover ♦ 9900885007 Step motor ♦ 9381354009 Motor cover ♦ 9378252028 Long-life filter ♦...
  • Page 26 3. Indoor unit parts list 3-1. Models: AUUH18LUAS and AUUH24LUAS ¢ Fan and PC boards - (02-4) - 3-1. Models: AUUH18LUAS and AUUH24LUAS 3. Indoor unit parts list...
  • Page 27 →ire with connector — 9710172007 ♦ (CN55 on Main PCB—CN304 on Power supply PCB) →ire with connector — 9710343117 ♦ (CN300 on Main PCB—↔1, ↔2 on Terminal 5P) - (02-5) - 3-1. Models: AUUH18LUAS and AUUH24LUAS 3. Indoor unit parts list...
  • Page 28 ¢ Chassis - (02-6) - 3-1. Models: AUUH18LUAS and AUUH24LUAS 3. Indoor unit parts list...
  • Page 29 Evaporator total assy (18 model) ♦ 9378580954 Evaporator total assy (24 model) ♦ 9378173569 Pipe insulation C ♦ 9378173521 Pipe insulation D ♦ 9378601017 Drain hose heat insulation ♦ - (02-7) - 3-1. Models: AUUH18LUAS and AUUH24LUAS 3. Indoor unit parts list...
  • Page 30 3-2. Models: AUUH30LUAS and AUUH36LUAS ¢ Fan and PC boards - (02-8) - 3-2. Models: AUUH30LUAS and AUUH36LUAS 3. Indoor unit parts list...
  • Page 31 Item no. Part no. Part name Service part 9381794003 Float switch sub assy ♦ 9381789023 Drain pan sub assy ♦ 9375502010 Drain cap ♦ 9381303007 Turbo fan assy ♦ 9378394018 Turbo fan washer ♦ 9356998009 ♦ 9381345014 Bell-mouth hood H ♦...
  • Page 32 ¢ Chassis - (02-10) - 3-2. Models: AUUH30LUAS and AUUH36LUAS 3. Indoor unit parts list...
  • Page 33 Item no. Part no. Part name Service part 9603443009 DC fan motor ♦ 9381787029 Insulation box sub assy ♦ 9381793006 Drain pump sub assy ♦ 9381788002 Drain port sub assy ♦ 9379757003 Hose band ♦ 9377785022 Drain hose ♦ 9900903008 Thermistor (Pipe temp.) ♦...
  • Page 34 4. Outdoor unit parts list 4-1. Model: AOUH18LUAS1 ¢ Exterior parts and chassis - (02-12) - 4-1. Model: AOUH18LUAS1 4. Outdoor unit parts list...
  • Page 35 Item no. Part no. Part name Service part 9323834330 Heat exchanger unit ♦ 9377854001 Protective net assy ♦ 9322556028 Top panel assy ♦ 9322327000 Thermistor holder ♦ 9900984014 Thermistor (Heat exchanger) ♦ 9900935054 Thermistor assy (Discharge temp.) ♦ 9709688427 Main PCB ♦...
  • Page 36 ¢ Compressor - (02-14) - 4-1. Model: AOUH18LUAS1 4. Outdoor unit parts list...
  • Page 37 Item no. Part no. Part name Service part 9323825215 Compressor unit ♦ 9322446015 4-way valve assy ♦ 9970194023 Solenoid ♦ 9970222016 Expansion valve coil ♦ 9322463029 Pulse motor valve assy ♦ 9322474001 2-way valve assy ♦ 9387831016 3-way valve assy ♦...
  • Page 38 4-2. Model: AOUH24LUAS1 ¢ Exterior parts and chassis - (02-16) - 4-2. Model: AOUH24LUAS1 4. Outdoor unit parts list...
  • Page 39 Item no. Part no. Part name Service part 9383880001 Top panel assy ♦ 9383779008 Protective net ♦ 9375361013 Net rubber ♦ 9900984038 Thermistor (Heat exchanger) ♦ 9900727154 Thermistor assy ♦ 9383607004 Thermo holder ♦ 9383874000 Right panel sub assy ♦ 9384997005 Rear pipe cover ♦...
  • Page 40 ¢ Compressor - (02-18) - 4-2. Model: AOUH24LUAS1 4. Outdoor unit parts list...
  • Page 41 Item no. Part no. Part name Service part 9900565091 Thermistor (Outdoor temp.) ♦ 9357804002 Thermostat holder ♦ 9900186029 Pressure switch ♦ 9374425723 4-way valve assy ♦ 9970194016 Solenoid ♦ 9380416029 Joint pipe D ♦ 9970209000 Expansion valve coil ♦ 9375250225 Accumulator assy ♦...
  • Page 42 4-3. Models: AOUH30LUAS1 and AOUH36LUAS1 ¢ Exterior parts and chassis - (02-20) - 4-3. Models: AOUH30LUAS1 and AOUH36LUAS1 4. Outdoor unit parts list...
  • Page 43 Item no. Part no. Part name Service part 9383880001 Top panel assy ♦ 9381013005 Protective net ♦ 9375361013 Net rubber ♦ 9900984038 Thermistor (Heat exchanger) ♦ 9900727154 Thermistor assy ♦ 9383607004 Thermo holder ♦ 9383874017 Right panel sub assy ♦ 9384997005 Rear pipe cover ♦...
  • Page 44 ¢ Compressor - (02-22) - 4-3. Models: AOUH30LUAS1 and AOUH36LUAS1 4. Outdoor unit parts list...
  • Page 45 Item no. Part no. Part name Service part 9380516019 S-ABS (top) ♦ 9900565091 Thermistor (Outdoor temp.) ♦ 9900186029 Pressure switch ♦ 9374425761 4-way valve assy ♦ 9970194016 Solenoid ♦ 9375250188 Accumulator assy ♦ 9970209000 Expansion valve coil ♦ 9380416012 Joint pipe D ♦...
  • Page 46 5. Accessories 5-1. Indoor unit ¢ Models: AUUH18LUAS, AUUH24LUAS, AUUH30LUAS, and AUUH36LUAS Part name Exterior Part name Exterior Installation manual Insulation Operation manual Drain hose Template (Carton top) Hose band Drain hose heat →asher insulation Coupler heat insulation Cable tie (Large)
  • Page 47 6. Optional parts 6-1. Indoor unit ¢ Controllers Exterior Part name Model name Summary Easy finger touch operation with LCD Office Fri 10:00AM Mode Set Temp. →ired Remote panel. Backlit LCD enables easy Cool 80°F Custom Auto UT↔-RNRUZ* Auto 74°F Heat Controller operation in a dark room.
  • Page 48 ¢ Cassette Grille Exterior Part name Model name Summary This cassette grille to blow airflow in Cassette Grille UTG-GCGF 360º direction by unique seamless airflow louver design. This cassette grille to blow airflow in 360º direction by unique seamless Cassette Grille UTG-LCGVCB airflow louver design.
  • Page 49 ¢ Others Exterior Part name Model name Summary Human Sensor UT↔-SHZ↓C For circular flow cassette type. Use to connect with various peripheral devices and air conditioner PCB. External UT↔-↓→Z↓ZG Connect Kit For control output port. Connecting point: CN47 on Main PCB Air Outlet Installed at the air outlet when 3- UTR-↔DZK...
  • Page 50 For connection between indoor unit with UART interface and a KN↓ open KN↓ Convertor UT↔-VKS↓ network. Connecting point: CN65 or CN75 on Main PCB This converter can control Fujitsu General products using a third-party Thermostat UT↔-TTR↓Z* thermostat controller. Converter Connecting point: Terminal block (↔1, ↔2) on Main PCB...
  • Page 51 6-2. Outdoor unit Exterior Part name Model name Summary Use to operate the external input and External UT↔-↓→Z↓Z3 output functions of outdoor unit. Connect Kit (for 24-36 model) - (02-29) - 6-2. Outdoor unit 6. Optional parts...
  • Page 52 7. Refrigerant system diagrams 7-1. Model: AOUH18LUAS1 Heat exchanger 3-way (INDOOR) valve 2-way Muffler valve Muffler Strainer 4-way valve Expansion valve Accumulator Heat exchanger Strainer (OUTDOOR) Cooling Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature)
  • Page 53 7-2. Model: AOUH24LUAS1 Heat exchanger 3-way 3-way (INDOOR) valve valve Pressure switch 4-way valve Strainer Expansion valve Strainer Heat exchanger (OUTDOOR) : Cooling : Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature) : Thermistor (Room temperature)
  • Page 54 7-3. Models: AOUH30LUAS1 and AOUH36LUAS1 Heat exchanger 3-way 3-way (INDOOR) valve valve Pressure switch 4-way valve Strainer Expansion valve Strainer Heat exchanger (OUTDOOR) : Cooling : Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature)
  • Page 55 8. Wiring diagrams 8-1. Indoor unit ¢ Models: AUUH18LUAS, AUUH24LUAS, AUUH30LUAS, and AUUH36LUAS - (02-33) - 8-1. Indoor unit 8. →iring diagrams...
  • Page 56 8-2. Outdoor unit ¢ Model: AOUH18LUAS1 Heat exchanger 3-way (INDOOR) valve 2-way Muffler valve Muffler Strainer 4-way valve Expansion valve Accumulator Heat exchanger Strainer (OUTDOOR) Cooling Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature)
  • Page 57 ¢ Model: AOUH24LUAS1 Heat exchanger 3-way 3-way (INDOOR) valve valve Pressure switch 4-way valve Strainer Expansion valve Heat exchanger Strainer (OUTDOOR) : Cooling : Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature) : Thermistor (Room temperature)
  • Page 58 ¢ Models: AOUH30LUAS1 and AOUH36LUAS1 Heat exchanger 3-way 3-way (INDOOR) valve valve Pressure switch 4-way valve Strainer Expansion valve Heat exchanger Strainer (OUTDOOR) : Cooling : Heating : Thermistor (Compressor temperature) : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature)
  • Page 59 9. PC board diagrams 9-1. Models: AUUH18LUAS, AUUH24LUAS, AUUH30LUAS, and AUUH36LUAS (including UTG-GCGF) CONTROL UNIT 18 model: EZ-02220HSE 24 model: EZ-02221HSE 30 model: EZ-021DHSE 36 model: EZ-02222HSE EMI FILTER TERMINAL ZCAT1518-0730 CN8 Thermistor Characteristics. DC5 V 2 TURNS CN300-1 UL1007 AWG22 RED...
  • Page 60 9-2. Model: AOUH18LUAS1 CONTROL UNIT 18 model: EZ-0200YHUE EMI FILTER XXXX EMI FILTER 2 TURNS XXXX EMI FILTER UL3271 AWG16 2 TURNS XXXX W400 1 TURN UL1015 AWG20 UL3271 AWG16 BLACK W401 W103 WHITE WHITE COMPRESSOR UL3271 AWG16 W402 INDOOR UL1015 AWG20 BLACK BLACK...
  • Page 61 9-3. Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 CONTROL UNIT 24 model: EZ-02201HUE 30, 36 models: EZ-02202HUE 5 V-1 UL1015 AWG20 GREEN BLACK P700 THERMISTOR (HEAT SINK TEMP.) B03B-XAKK-1-A INDOOR POWER SUPPLY/COM. BLACK BLACK TERMINAL P108 EMI FILTER EMI FILTER B3 (8.0) B-PSILE-1 GRFC-8 GRFC-13 BLUE...
  • Page 62 - (02-40) - 9-3. Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 9. PC board diagrams...
  • Page 63 3. TROUBLESHOOTING 2023.04.25 SR_CH03_AU036EF_01...
  • Page 64 CONTENTS 3. TROUBLESHOOTING 1. Error code ....................03-1 1-1. How to check the error memory..................03-1 1-2. How to erase the error memory ..................03-1 1-3. Error code table (→ired remote controller)..............03-2 1-4. Error code table (Outdoor unit) ..................03-3 2. Troubleshooting with error code ...............03-5 2-1.

  • Page 65: Table Of Contents

    CONTENTS (continued) 3. Troubleshooting without error code............03-46 3-1. Indoor unit—No power....................03-46 3-2. Outdoor unit—No power....................03-47 3-3. No operation (Power is on) ...................03-48 3-4. No cooling/No heating ....................03-49 3-5. Abnormal noise......................03-51 3-6. →ater leaking........................03-52 4. Service parts information .................03-53 4-1. Compressor........................03-53 4-2.
  • Page 67 1. Error code →hen a problem occurs in the system or the connected device, the error content is notified by dis- playing the code. NOTE: This function is only available in a system with indoor or IR receiver units equipped with in- dicator lamps to show the error content.
  • Page 68 1-3. Error code table (Wired remote controller) The operation, timer, and economy indicators operate according to the error contents. For confirmation of the error contents, refer the flashing pattern as follows. Wired remote Error contents controller display E: 11.↓. Serial communication error (Serial reverse transfer error) (Outdoor unit) E: 11.↓.

  • Page 69: E: 11.↓. Serial Communication Error (Serial Reverse Transfer Error) (Outdoor Unit)

    1-4. Error code table (Outdoor unit) The operation status is determined by the lighting up and blinking of the LED lamp. After check that ERROR LED lamp blinks, press the ENTER button once. NOTE: For the positions of LED lamp and buttons, refer to "Function settings (for 24-36 outdoor units)"...
  • Page 70 PUMP LOW NOISE PEAK CUT POWER/ DOWN Error contents ERROR MODE E: 74.↓. Outdoor temperature ■ ● ■ ■ ○ ○ ○ ● thermistor error (Outdoor unit) E: 77.↓. Heat sink thermistor error ■ ● ■ ■ ○ ○ ○ ●...
  • Page 71 2. Troubleshooting with error code 2-1. E: 11.X. Serial communication error (Serial reverse transfer error) (Outdoor unit) →ired remote Indicator Error code E: 11 controller Main PCB →hen the indoor unit cannot receive the serial signal from outdoor unit more than 2 minutes after power on, Detective actuator Outdoor unit or the indoor unit cannot receive the serial signal more...
  • Page 72 Check point 4. Check serial signal (Reverse transfer signal) Check serial signal (Reverse transfer signal) BLACK WHITE BLACK WHITE • Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1 —3. •...
  • Page 73 2-2. E: 11.X. Serial communication error (Serial forward transfer error) (Indoor unit) →ired remote Indicator Error code E: 11 controller →hen the outdoor unit cannot receive the serial signal Detective actuator Indoor unit Main PCB from indoor unit more than 10 seconds. Connection failure Forecast of cause External cause...
  • Page 74 Check point 4. Check serial signal (Forward transfer signal) Check serial signal (Forward transfer signal) BLACK WHITE BLACK WHITE • 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. Check point 1-2.

  • Page 75: E: 12.↓. →Ired Remote Controller Communication Error (Indoor Unit)

    2-3. E: 12.X. Wired remote controller communication error (Indoor unit) →ired remote Indicator Error code E: 12 controller Indoor unit Main PCB →hen the indoor unit cannot receive the signal from Detective actuator →ired remote controller more than 1 minute during →ired remote control normal operation.

  • Page 76: E: 15.↓. Automatic Air Flow Adjustment Error (Indoor Unit)

    2-4. E: 15.X. Automatic air flow adjustment error (Indoor unit) →ired remote Indicator Error code E: 15 controller • On automatic airflow adjustment operation, when the fan speed other than 0rpm is detected at the 0rpm operation. • On automatic airflow adjustment operation, when Detective actuator Indoor unit Main PCB...

  • Page 77: E: 18.↓. External Communication Error (Indoor Unit)

    2-5. E: 18.X. External communication error (Indoor unit) →ired remote Indicator Error code E: 18 controller External After receiving a signal from the external input and Detective actuator Indoor unit communication output PCB, the same signal has not been received for error 15 seconds.

  • Page 78: E: 23.↓. Combination Error (Outdoor Unit)

    2-6. E: 23.X. Combination error (Outdoor unit) →ired remote Indicator Error code E: 23 controller The outdoor unit receives the serial signal of applied Detective actuator Indoor unit refrigerant information from indoor unit. Forecast of cause Incorrect indoor unit is selected. Check point 1.

  • Page 79: E: 26.↓. Address Setting Error In Wired Remote Controller (Indoor Unit)

    2-7. E: 26.X. Address setting error in wired remote controller (Indoor unit) →ired remote Indicator Error code E: 26 controller →ired remote controller (2-wire) • →hen the address number set by auto setting and manual setting are mixed in one remote controller group Detective actuator Indoor unit controller PCB...

  • Page 80: E: 29.↓. Connected Unit Number Error (Indoor Unit)

    2-8. E: 29.X. Connected unit number error (Indoor unit) →ired remote Indicator Error code E: 29 controller →ired remote controller (2-wire) →hen the number of the connected indoor unit exceeds Detective actuator the limitation. Indoor unit main PCB →rong wiring of indoor unit or remote controller Number of indoor unit or remote controller in remote Forecast of cause controller group...

  • Page 81: E: 32.↓. Indoor Unit Main Pcb Error (Indoor Unit)

    2-9. E: 32.X. Indoor unit main PCB error (Indoor unit) →ired remote Indicator Error code E: 32 controller →hen power is on and there is some below case. Detective actuator Indoor unit Main PCB 1. →hen model information of EEPROM is incorrect. 2.

  • Page 82: E: 33.↓. Indoor Unit Motor Electricity Consumption Detection Error (Indoor Unit)

    2-10. E: 33.X. Indoor unit motor electricity consumption detection error (Indoor unit) →ired remote Indicator Error code E: 33 controller Indoor unit motor electricity →hen the voltage value or the current value of the motor Detective actuator consumption detection go beyond the limits Fan motor failure Forecast of cause Main PCB failure...

  • Page 83: E: 35.↓. Manual Auto Button Error (Indoor Unit)

    2-11. E: 35.X. MANUAL AUTO button error (Indoor unit) →ired remote Indicator Error code E: 35 controller Indoor unit controller PCB →hen the MANUAL AUTO button becomes on for Detective actuator Indicator PCB consecutive 60 or more seconds. Manual auto switch MANUAL AUTO button failure Forecast of cause Controller PCB and indicator PCB failure...

  • Page 84: E: 39.↓. Indoor Unit Power Supply Error For Fan Motor (Indoor Unit)

    2-12. E: 39.X. Indoor unit power supply error for fan motor (Indoor unit) →ired remote Indicator Error code E: 39 controller • →hen a momentary power cut off Detective actuator Indoor unit main PCB • →hen do not start fan motor External cause Forecast of cause Connector connection failure...
  • Page 85 2-13. E: 3A.X. Indoor unit communication circuit (wired remote controller) error →ired remote Indicator Error code E: 3A controller →ired remote controller (2-wire) Detect the communication error of microcomputer and Detective actuator communication PCB. Indoor unit controller PCB circuit Communication PCB defective Forecast of cause Indoor unit main PCB defective Check point 1.

  • Page 86: E: 41.↓. Room Temperature Sensor Error (Indoor Unit)

    2-14. E: 41.X. Room temperature sensor error (Indoor unit) →ired remote Indicator Error code E: 41 controller Indoor unit main PCB Room temperature thermistor is open or short is Detective actuator detected always. Room temperature thermistor Connector failure Forecast of cause Thermistor failure Main PCB failure Check point 1.

  • Page 87: E: 42.↓. Indoor Unit Heat Exchanger Sensor Error (Indoor Unit)

    2-15. E: 42.X. Indoor unit heat exchanger sensor error (Indoor unit) →ired remote Indicator Error code E: 42 controller Indoor unit main PCB →hen heat exchanger temperature thermistor open or Detective actuator Heat exchanger temperature short circuit is detected. thermistor Connector connection failure Forecast of cause Thermistor failure...

  • Page 88: E: 51.↓. Indoor Unit Fan Motor Error (Indoor Unit)

    2-16. E: 51.X. Indoor unit fan motor error (Indoor unit) →ired remote Indicator Error code E: 51 controller Main PCB →hen the actual rotation number of the indoor unit fan Detective actuator Indoor unit motor is below 1/3 of the target rotation number Fan motor continuously for more than 56 seconds.

  • Page 89: E: 53.↓. Drain Pump Error (Indoor Unit)

    2-17. E: 53.X. Drain pump error (Indoor unit) →ired remote Indicator Error code E: 53 controller Indoor unit main PCB Detective actuator →hen Float switch is ON for more than 3 minutes. Float switch Float switch failure Shorted connector/wire failure Forecast of cause Main PCB failure Drain pump failure...

  • Page 90: E: 62.↓. Outdoor Unit Main Pcb Error (Outdoor Unit)

    2-18. E: 62.X. Outdoor unit main PCB error (Outdoor unit) →ired remote Indicator Error code E: 62 controller Access to EEPROM failed due to some cause after Detective actuator Outdoor unit Main PCB outdoor unit started. External cause (Noise, temporary open, voltage drop) Forecast of cause Main PCB failure Check point 1.

  • Page 91: E: 63.↓. Inverter Error (Outdoor Unit)

    2-19. E: 63.X. Inverter error (Outdoor unit) →ired remote Indicator Error code E: 63 controller Detective actuator Outdoor unit Inverter PCB Error information received from inverter PCB Forecast of cause External cause Power supply to inverter PCB wiring disconnection or open Inverter PCB failure Outdoor unit main PCB failure...

  • Page 92: E: 64.↓. Pfc Circuit Error (Outdoor Unit)

    2-20. E: 64.X. PFC circuit error (Outdoor unit) →ired remote Indicator Error code E: 64 controller • →hen inverter input DC voltage is higher than 425 V or lower than 80 V (for 18 model) or higher than 420 V for over 3 seconds (for 24/30/36 model), the Detective actuator Outdoor unit Main PCB...

  • Page 93: E: 65.↓. Trip Terminal L Error (Outdoor Unit)

    2-21. E: 65.X. Trip terminal L error (Outdoor unit) →ired remote Indicator Error code E: 65 controller →hen the signal from FO terminal of IPM is “L” (0 V) Detective actuator Outdoor unit Main PCB during the compressor stopping. Forecast of cause Main PCB failure Check point 1.

  • Page 94: E: 71.↓. Discharge Thermistor Error (Outdoor Unit)

    2-22. E: 71.X. Discharge thermistor error (Outdoor unit) →ired remote Indicator Error code E: 71 controller Outdoor unit main PCB →hen discharge pipe temperature thermistor open or Detective actuator short circuit is detected at power on or while running the Discharge pipe temperature compressor thermistor...

  • Page 95: E: 72.↓. Compressor Thermistor Error (Outdoor Unit)

    2-23. E: 72.X. Compressor thermistor error (Outdoor unit) →ired remote Indicator Error code E: 72 controller Outdoor unit main PCB →hen compressor temperature thermistor open or short Detective actuator circuit is detected at power on or while running the Compressor temperature thermistor compressor Connector failure Forecast of cause...
  • Page 96 2-24. E: 73.X. Heat exchanger (Middle/Outlet) temperature thermistor error (Outdoor unit) →ired remote Indicator Error code E: 73 controller Heat exchanger liquid temperature • Heat exchanger liquid temperature thermistor short thermistor or open detected Detective actuator Heat exchanger middle • Heat exchanger middle temperature thermistor temperature thermistor short or open detected...
  • Page 97 2-25. E: 74.X. Outdoor temperature thermistor error (Outdoor unit) →ired remote Indicator Error code E: 74 controller Outdoor unit main PCB →hen outdoor temperature thermistor open or short Detective actuator circuit is detected at power on or while running the Outdoor temperature thermistor compressor Connector failure...
  • Page 98 2-26. E: 77.X. Heat sink thermistor error (Outdoor unit) (24/30/36 model) →ired remote Indicator Error code E: 77 controller Detective actuator Heat sink temperature thermistor Heat sink temperature thermistor short or open detected Connector failure Forecast of cause Thermistor failure Inverter PCB failure Check point 1.
  • Page 99 2-27. E: 84.X. Current sensor error (Outdoor unit) →ired remote Indicator Error code E: 84 controller →hen input current sensor has detected 0 A, while inverter compressor is operating at higher than 56 rps, Detective actuator Outdoor unit Main PCB after 1 minute upon starting the compressor.
  • Page 100 2-28. E: 86.X. High pressure switch error (Outdoor unit) (24/30/36 model) →ired remote Indicator Error code E: 86 controller Outdoor unit main PCB →hen pressure switch open is detected in 10 seconds Detective actuator after the power is turned on. High pressure switch High pressure switch connector disconnection or open Forecast of cause...
  • Page 101 2-29. E: 94.X. Trip detection (Outdoor unit) →ired remote Indicator Error code E: 94 controller Inverter PCB Protection stop by over-current generation after inverter compressor start processing completed generated Main PCB consecutively 10 times. Detective actuator Outdoor unit NOTE: The number of generations is reset when the Compressor compressor starts up.
  • Page 102 2-30. E: 95.X. Compressor motor control error (Outdoor unit) →ired remote Indicator Error code E: 95 controller Inverter PCB "Protection stop by "overcurrent generation at inverter compressor starting" restart" generated consecutively 50 Main PCB Detective actuator Outdoor unit times x 3 sets (total 150 times) (for 18 model) or 10 Compressor times x 3 sets (total 30 times) (for 24/30/36 model).
  • Page 103 2-31. E: 97.X. Outdoor unit fan motor error (Outdoor unit) →ired remote Indicator Error code E: 97 controller Inverter PCB 1. →hen outdoor fan rotation speed is less than 100 rpm in 20 seconds after fan motor starts, fan motor Main PCB stops.
  • Page 104 Check point 4. Check output voltage of inverter PCB Check outdoor unit circuit diagram and the voltage. (Measure at inverter PCB side connector) FAN MOTOR BLACK WHITE YELLOW BROWN NOTE: For details of wiring diagram, refer to "→iring diagrams" in Chapter 2. TECHNICAL DATA AND PARTS LIST on page 02-33.
  • Page 105 2-32. E: 99.X. 4-way valve error (Outdoor unit) →ired remote Indicator Error code E: 99 controller Indoor unit main PCB →hen the indoor heat exchanger temperature is compared with the room temperature, and either Heat exchanger temperature following condition is detected continuously two times, thermistor the compressor stops.
  • Page 106 Check point 4. Check the solenoid coil and 4-way valve NOTE: Refer solenoid coil and 4-way valve in "Service parts information" on page 03-53. • Solenoid coil Remove P60 from PCB and check the resistance value of coil. Resistance value is 1.970 kΩ (at 68°F [20°C]).
  • Page 107 2-33. E: A1.X. Discharge temperature error (Outdoor unit) →ired remote Indicator Error code E: A1 controller Outdoor unit main PCB Protection stop by discharge temperature ≥ 230°F Detective actuator (110°C) during compressor operation generated 2 times Discharge temperature thermistor within 24 hours. 3-way valve not opened EEV or capillary tube defective, strainer clogged Outdoor unit operation failure, foreign matter on heat...
  • Page 108 Check point 5. Check the refrigerant amount Check the refrigerant leakage. Check point 6. Replace the main PCB If check point 1 to 5 do not improve the symptom, replace the main PCB. - (03-42) - 2-33. E: A1.↓. Discharge temperature error (Outdoor unit) 2.
  • Page 109 2-34. E: A3.X. Compressor temperature error (Outdoor unit) →ired remote Indicator Error code E: A3 controller Outdoor unit main PCB Protection stop by compressor temperature ≥ 226.4°F Detective actuator (108°C) during compressor operation generated 2 times Compressor temperature thermistor within 24 hours. 3-way valve not opened EEV defective, strainer clogged Outdoor unit operation failure, foreign matter on heat...
  • Page 110 Check point 5. Check the refrigerant amount Check the refrigerant leakage. Check point 6. Replace the main PCB If check point 1 to 5 do not improve the symptom, replace the main PCB. - (03-44) - 2-34. E: A3.↓. Compressor temperature error (Outdoor unit) 2.
  • Page 111 2-35. E: AC.X. Heat sink temperature error (Outdoor unit) (24/30/36 model) →ired remote Indicator Error code E: AC controller Outdoor unit inverter PCB Protection stop by heat sink temperature ≥ 176°F (80°C) Detective actuator during heat sink operation generated 2 times within 24 Heat sink temperature thermistor hours.

  • Page 112: Troubleshooting Without Error Code

    3. Troubleshooting without error code 3-1. Indoor unit—No power Power supply failure Forecast of cause External 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”.

  • Page 113: Outdoor Unit-No Power

    3-2. Outdoor unit—No power Power supply failure Forecast of cause External cause Electrical components defective Check point 1. Check installation condition • Is the circuit breaker on or off? • Check loose or removed connection cable. If abnormal condition is found, correct it by referring to the installation manual or the “DESIGN & TECHNICAL MANUAL”.

  • Page 114: No Operation (Power Is On)

    3-3. No operation (Power is on) Setting/ Connection failure Forecast of cause External cause Electrical components defective Check point 1. Check indoor and outdoor installation condition • Indoor unit: – Check incorrect wiring between indoor unit and remote controller. – Check if there is an open cable connection.

  • Page 115: No Cooling/No Heating

    3-4. No cooling/No heating Indoor unit error Outdoor unit error Forecast of cause Effect by surrounding environment Connection pipe/Connection wire failure Refrigeration cycle failure Check point 1. Check Indoor unit • Does Indoor unit fan run in the HIGH mode? •...
  • Page 116 NOTES: • Strainer normally does not have temperature difference between inlet 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, re- place the strainer.

  • Page 117: Abnormal Noise

    3-5. Abnormal noise Abnormal installation (indoor unit/outdoor unit) Forecast of cause Fan failure (indoor unit/outdoor unit) Compressor failure (outdoor) Diagnosis method when abnormal noise is occurred Abnormal noise is coming from Outdoor Abnormal noise is coming from Indoor unit. unit. (Check and correct followings) (Check and correct followings) •...

  • Page 118: Ater Leaking

    3-6. Water leaking Erroneous installation Forecast of cause Drain hose failure Diagnosis method when water is spitting Diagnosis method when water leak occurs • Is main unit installed in stable condi- tion? Is the filter clogged? • Is main unit broken or deformed at the time of transportation or maintenance? MPa MPa •...

  • Page 119: Service Parts Information

    4. Service parts information 4-1. Compressor Diagnosis method of compressor (If outdoor unit LED displays error, refer to troubleshooting) Does not start up Stops soon after starting up Abnormal noise Check if vibration noise by Is there open or loose con- Is there open or loose con- loose bolt or contact noise of nection cable?

  • Page 120: Inverter Compressor

    4-2. Inverter compressor ¢ Model: AOUH18LUAS1 Check point 1. Check connection • Check terminal connection of compressor (loose or incorrect wiring) W(C) V(S) (BLACK) (WHITE) Main PCB U(R) (RED) • Check terminal connection of main PCB (loose or incorrect wiring) Main PCB W400(U) W401(V) W402(W)
  • Page 121 ¢ Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 Check point 1. Check the terminal connection. • Check the following terminal connections of the compressor. (Loosening or incorrect wiring.) S (V) C (W) R (U): Red S (V): →hite Main PCB C (W): Black R (U) •...

  • Page 122: Outdoor Unit Electronic Expansion Valve (Eev)

    4-3. Outdoor unit Electronic Expansion Valve (EEV) ¢ Model: AOUH18LUAS1 Check point 1. Check connections Check connection of connector. (Loose connector or open cable) NOTE: For details of wiring diagram, refer to "→iring diagrams" in Chapter 2. TECHNICAL DATA AND PARTS LIST on page 02-33. Check point 2.
  • Page 123 Check point 6. Check strainer • Strainer normally does not have temperature difference between inlet 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.
  • Page 124 ¢ Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 Check point 1. Check connections Check connection of connector. (Loose connector or open cable) NOTE: For details of wiring diagram, refer to "→iring diagrams" in Chapter 2. TECHNICAL DATA AND PARTS LIST on page 02-33. Check point 2.
  • Page 125 Check point 6. Check strainer • Strainer normally does not have temperature difference between inlet 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.

  • Page 126: Indoor Unit Fan Motor

    4-4. Indoor unit fan motor Check point 1. Check rotation of fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) If fan or bearing is abnormal, replace it. Check point 2. Check resistance of indoor fan motor Refer to below.

  • Page 127: Outdoor Unit Fan Motor

    4-5. Outdoor unit fan motor Check point 1. Check rotation of fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) If fan or bearing is abnormal, replace it. Check point 2. Check resistance of outdoor fan motor Refer to below.

  • Page 128: 4-Way Valve Coil (Solenoid Coil)/4-Way Valve

    4-7. 4-way valve coil (solenoid coil)/4-way valve Check point 1. Check connection • Check the connection of connector P60. BLACK SOLENOID COIL BLACK Check Point 2 : Check solenoid coil Remove P60 from PCB and check the resistance value of coil. Resistance value ≈...

  • Page 129: Thermistor Resistance Values

    5. Thermistor resistance values 5-1. Indoor unit ¢ Room temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) 14.0 (-10.0) 58.25 0.73 23.0 (-5.0) 44.03 0.93 32.0 (0.0) 33.62 1.15 41.0 (5.0) 25.92 1.39 50.0 (10.0) 20.17 1.66 59.0 (15.0) 15.84 1.94 68.0 (20.0)

  • Page 130: Outdoor Unit

    5-2. Outdoor unit ¢ Heatsink thermistor  Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 94.26 0.08 -12.0 (-25.0) 67.95 0.11 -4.0 (-20.0) 49.62 0.15 5.0 (-15.0) 36.68 0.20 14.0 (-10.0) 27.42 0.26 23.0 (-5.0) 20.73 0.34 32.0 (0.0)
  • Page 131 ¢ Discharge temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 1,013.11 0.06 -12.0 (-25.0) 729.09 0.09 -4.0 (-20.0) 531.56 0.12 5.0 (-15.0) 392.31 0.16 14.0 (-10.0) 292.91 0.21 23.0 (-5.0) 221.09 0.28 32.0 (0.0) 168.60 0.36 41.0 (5.0) 129.84 0.46 50.0 (10.0)
  • Page 132 ¢ Compressor temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 1,013.11 0.06 -12.0 (-25.0) 729.09 0.09 -4.0 (-20.0) 531.56 0.12 5.0 (-15.0) 392.31 0.16 14.0 (-10.0) 292.91 0.21 23.0 (-5.0) 221.09 0.28 32.0 (0.0) 168.60 0.36 41.0 (5.0) 129.84 0.46 50.0 (10.0)
  • Page 133 ¢ Heat exchanger temperature thermistor Temperature °F (°C) Resistance (kΩ) Voltage (V) -22.0 (-30.0) 95.57 0.24 -12.0 (-25.0) 68.89 0.32 -4.0 (-20.0) 50.31 0.43 5.0 (-15.0) 37.19 0.57 14.0 (-10.0) 27.81 0.73 23.0 (-5.0) 21.02 0.92 32.0 (0.0) 16.05 1.14 41.0 (5.0) 12.38 1.39...
  • Page 134 ¢ 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)
  • Page 135 4. CONTROL AND FUNCTIONS 2023.04.25 SR_CH04_AU036EF_01...
  • Page 136 CONTENTS 4. CONTROL AND FUNCTIONS 1. Rotation number control of compressor...........04-1 1-1. Cooling operation ......................04-1 1-2. Heating operation ......................04-3 1-3. Dry operation ........................04-4 1-4. Rotation number of compressor at normal start-up ............04-5 1-5. Rotation number of compressor limitation by outdoor temperature ........04-8 2.
  • Page 137 CONTENTS (continued) 8-6. High pressure protection (for 24/30/36 model) .............04-40 8-7. Low outdoor temperature protection................04-40 8-8. High temperature and high pressure release control ............04-41...

  • Page 139: Rotation Number Control Of Compressor

    • Rotation number range of compressor Unit: rps Model name Minimum frequency Maximum frequency AUUH18LUAS AUUH24LUAS AUUH30LUAS AUUH36LUAS - (04-1) - 1-1. Cooling operation 1. Rotation number control of compressor...
  • Page 140 Unit: rps Outdoor Indoor unit fan mode Model name temperature HIGH QUIET zone A zone B zone C zone AUUH18LUAS D zone E zone F zone A zone B zone C zone AUUH24LUAS D zone E zone F zone A zone...

  • Page 141: Heating Operation

    • Rotation number range of compressor Unit: rps Model name Minimum frequency Maximum frequency AUUH18LUAS AUUH24LUAS AUUH30LUAS AUUH36LUAS - (04-3) - 1-2. Heating operation 1. Rotation number control of compressor...

  • Page 142: Dry Operation

    Zone is defined by set temperature and room temperature. • Rotation number range of compressor Unit: rps Model name Outdoor temperature zone Operating frequency ↓ zone AUUH18LUAS J zone ↔ zone ↓ zone AUUH24LUAS J zone ↔ zone ↓ zone...

  • Page 143: Rotation Number Of Compressor At Normal Start-Up

    1-4. Rotation number of compressor at normal start-up ¢ Model: AOUH18LUAS1 Rotation number of compressor soon after starting is controlled as below. Rotation number VI Rotation number V Rotation number IV Rotation number III Rotation number II Rotation number I Time 1 Time 2 Time 3...
  • Page 144 ¢ Model: AOUH24LUAS1 Rotation number of compressor soon after starting is controlled as below. Rotation number VI Rotation number V Rotation number IV Rotation number III Rotation number II Rotation number I Time 1 Time 2 Time 3 Time 4 Time 5 Time 6 •...
  • Page 145 ¢ Models: AOUH30LUAS1 and AOUH36LUAS1 Rotation number of compressor soon after starting is controlled as below. Rotation number X Rotation number IX Rotation number VIII Rotation number VII Rotation number VI Rotation number V Rotation number IV Rotation number III Rotation number II Rotation numbery I Time 1...

  • Page 146: Rotation Number Of Compressor Limitation By Outdoor Temperature

    1-5. Rotation number of compressor limitation by outdoor temperature ¢ Model: AOUH18LUAS1 The minimum rotation number of compressor is limited by outdoor temperature as below. • Cooling/Dry mode F zone 100.4°F (38°C) E zone 66.2°F (19°C) D zone 50.0°F (10°C) C zone 32.0°F (0°C)
  • Page 147 ¢ Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 The minimum rotation number of compressor is limited by outdoor temperature as below. • Cooling/Dry mode H zone 125.6°F (52°C) G zone 122.0°F (50°C) F zone 107.6°F (42°C) E zone 100.4°F (38°C) D zone 69.8°F (21°C) C zone...
  • Page 148 • Heating mode I zone 68.0°F (20°C) H zone 60.8°F (16°C) G zone 53.6°F (12°C) F zone 44.6°F (7°C) E zone 35.6°F (2°C) D zone 19.4°F (-7°C) C zone 14.0°F (-10°C) 5.0°F B zone (-15°C) A zone Unit: rps Limitation of compressor Model name Outdoor temperature zone frequency...

  • Page 149: Auto Changeover Operation

    2. Auto changeover operation →hen the air conditioner is set to AUTO mode by remote controller, operation starts in the optimum mode from among heating, cooling, dry and monitoring modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set be- tween 64.4 °F (18 °C) and 86.0 °F (30 °C) in 1.0 °F (0.5 °C) steps.
  • Page 150 Operation flow chart Start Ts: Setting temperarure Monitor mode Room temp. > Ts+3.6°F(2°C)? Room temp. < Ts-3.6°F(2°C)? Middle zone Auto change over is second or more? Operation mode before the monitor mode is cooling mode? Operation mode of Heating operation Cooling operation outdoor unit: Cooling? Thermostat remains...

  • Page 151: Fan Control

    3. Fan control Tr: Room temperature Ts: Setting temperature 3-1. Indoor fan control ¢ Fan speed Indoor fan speed is defined as below. Speed (rpm) Operation Fan mode mode AUUH18LUAS AUUH24LUAS AUUH30LUAS AUUH36LUAS HIGH MED+ LO→ Heating QUIET Cool air prevention S-LO→...
  • Page 152 ¢ Dry operation During dry operation, fan speed setting can not be changed as shown in “Fan speed” above. ¢ Heating operation Switch the airflow AUTO, and the indoor fan motor will run according to a room temperature, as be- low.
  • Page 153 • MIN. HEAT operation Indoor heat exchanger Indoor heat exchanger temperature rises temperature drops AUTO 102.2°F (39°C) 93.2°F (34°C) ¢ 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 Indoor fan setting airflow...

  • Page 154: Outdoor Fan Control

    3-2. Outdoor fan control ¢ Outdoor fan motor This outdoor unit has a DC fan motor. (Control method is different between AC and DC motors.) ¢ Fan speed  Model: AOUH18LUAS1 Fan speed is defined by outdoor temperature and compressor frequency. •...
  • Page 155  Model: AOUH24LUAS1 Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm Fan step Cooling or dry Heating — — — S-HIGH — • →hen the compressor frequency increases, the outdoor fan speed also changes to the higher speed.
  • Page 156  Models: AOUH30LUAS1 and AOUH36LUAS1 Fan speed is defined by outdoor temperature and compressor frequency. Unit: rpm Fan step Cooling or dry Heating — — — S-HIGH — • →hen the compressor frequency increases, the outdoor fan speed also changes to the higher speed.

  • Page 157: Louver Control

    4. Louver control 4-1. Individual louver control To independently can be set the airflow pattern of each louver as follows: This function is given priority to overall louver control. But this function is release during the following operation. • Cold air prevention control •...

  • Page 158: Swing Operation

    4-3. Swing operation • To select up/down airflow swing operation →hen the swing signal is received, the horizontal louver starts to swing. – Swinging range • Cooling mode/dry mode/fan mode: 1 • Heating mode: 1 – →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.

  • Page 159: Timer Operation Control

    5. Timer operation control 5-1. Wireless remote control On/Off timer Program timer Sleep timer Weekly timer ○ ○ ○ — ¢ On/Off timer • Off timer: →hen the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 160 ¢ Sleep timer If the sleep timer is set, the room temperature is monitored and the operation is stopped auto- matically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time on. •...

  • Page 161: Ired Remote Control

    5-2. Wired remote control Temperature On/Off timer Program timer Sleep timer Weekly timer Setback Timer ○ ○ ○ ○ ○ ¢ On/Off timer • Off timer: →hen the clock reaches the set timer, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 162 ¢ Sleep timer If the sleep timer is set, the room temperature is monitored and the operation is stopped auto- matically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time on. •...
  • Page 163 ¢ Temperature Setback Timer • The temperature setback timer only changes the set temperature for 7 days, it cannot be used to start or stop air conditioner operation. • The temperature setback timer can be set to operate up to two times per day but only one temperature setting can be used.

  • Page 164: Defrost Operation Control

    6. Defrost operation control Tn: Outdoor unit heat exchanger temperature Ta: Outdoor temperature Tn10: Temperature at 10 minutes after compressor start Tnb: Temperature before 5 minutes Triggering condition • The defrost operation starts when outdoor unit heat exchanger temperature sensor detects the temperature lower than the values shown below.
  • Page 165 Release condition • – Model: AOUH18LUAS1 Depending on the triggering condition, different release conditions apply. • Normal defrost operation The defrost operation is released when either one of the conditions below is satisfied. 55.4°F (13°C) or more (Ta ≤ 33.8°F [1°C]) Outdoor unit heat exchanger temperature (after 1 minute or later since compressor start) 50.0°F (10°C) or more (Ta >...

  • Page 166: Defrost Operation In Heating Operation Stopped

    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 operation. In this time, if the indoor unit operation lamp flashes slowly (6 sec on/2 sec off), the outdoor unit al- low the heat exchanger to defrost, and then stop.

  • Page 167: Various Control

    7. Various control 7-1. Auto restart →hen the power was interrupted by a power failure etc. during operation, the operation contents at that time are memorized and when the power is recovered, operation is automatically started with the memorized operation contents. Operation contents memorized when the power is interrupted Operation mode Setting temperature...

  • Page 168: Fresh Air Control

    7-5. Fresh air control The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as below. Operation Fan motor (Indoor unit) Stop Operation Fan motor (for Fresh Air) Stop 7-6. Compressor preheating By preheating the compressor, warm airflow is quickly discharged when the operation is started. •...

  • Page 169: External Electrical Heater Control

    7-7. External electrical heater control The external electrical heater is operated as below. When the room Ts: Setting temperature temperature rises Heater : Off -1.8°F (Ts -1°C) -5.4°F (Ts -3°C) Heater : On -18.0°F (Ts -10°C) -21.6°F (Ts -12°C) Heater : Off When the room temperature drops NOTES:...

  • Page 170: Drain Pump Control

    7-9. Drain pump control ¢ Drain control for cooling operation  During the compressor in operation • Triggering condition The thermostat is turned on during cooling or dry mode. • Operation details The drain pump is turned on. • Release condition –...
  • Page 171  Overflow control • Triggering condition The float switch is turned on. • Operation details – The drain pump is turned on. – →hen the operation mode is cooling or dry, operate the followings. • The compressor is stopped. • Then indoor fan control is turned off. •...

  • Page 172: Prevention To Restart For 3 Minutes (3 Minutes St)

    7-10. 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. • Model: AOUH18LUAS1 Retry number Retry set number • Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 Retry number Retry set number →hen the compressor fails to start in the retry set number above, the compressor is stopped.

  • Page 173: Peak Cut Operation (For 24/30/36 Model)

    7-13. Peak cut operation (for 24/30/36 model) The current value is limited to reduce the power consumption by external input. Peak cut level Level 1 Level 2 Level 3 Level 4 Forced thermostat Peak cut for rated capacity 100% NOTES: •...
  • Page 174 Available Sensor ID Sensor ID Item Unit Remarks 0: Off, 1: On —: →hen the function setting 46 is not set Emergency stop (External input) 00: — NOTE: Available only for external input port of the indoor unit 0: Off, 1: On —: →hen the function setting 46 is not set Forced stop (External input)
  • Page 175 Available Sensor ID Sensor ID Item Unit Remarks Expansion valve (Upstream during 05: pls heating) 07: Cooling/ 4-way valve output status 0: Cooling, 1: Heating Heating Pressure switch (High pressure) 08: On/Off 0: Off (Close), 1: On (Open) Crankcase heater output On/Off 08: On/Off 0: Off, 1: On Base pan heater output On/Off...

  • Page 176: Various Protections

    8. Various protections 8-1. Discharge gas temperature over-rise prevention control The discharge gas temperature sensor (discharge thermistor: outdoor unit side) detects the dis- charge gas temperature. • →hen the discharge temperature becomes higher than the trigger condition, the compressor fre- quency is decreased as the table below, and it continues to decrease until the discharge tempera- ture becomes lower than the trigger condition.

  • Page 177: Current Release Control

    8-3. Current release control The rotation number of compressor is controlled so that the outdoor unit input current does not ex- ceeds current limit value set according to the outdoor temperature. The rotation number of compressor returns according to the operation mode, when the current be- comes lower than the release value.

  • Page 178: Indoor Unit Fan Motor Over Temperature Protection

    8-4. Indoor unit fan motor over temperature protection The fan motor over temperature protection activates after two judgments when fulfilling any of the following conditions. • Detected that the rotation number of the fan motor stays 200 rpm or less for 10 seconds after 90 seconds from the fan operation started.
  • Page 179 8-8. High temperature and high pressure release control The compressor is controlled as follows. ¢ Model: AOUH18LUAS1 • Cooling mode Indoor unit heat exchanger Indoor unit heat exchanger temperature rises temperature drops 141.8°F (61°C) Zone A 140.0°F (60°C) 138.2°F (59°C) Zone B 129.2°F (54°C) Zone C...
  • Page 180 ¢ Models: AOUH24LUAS1, AOUH30LUAS1, and AOUH36LUAS1 The compressor is controlled as follows. • Cooling mode Indoor unit heat exchanger Indoor unit heat exchanger temperature rises temperature drops 149.0°F (65°C) Zone A 143.6°F (62°C) 140.0°F (60°C) Zone B Zone C Stable zone Zone D Zone Operation...
  • Page 181 5. FILED WORKING 2023.04.25 SR_CH05_AU036EF_01...
  • Page 182 CONTENTS 5. FILED WORKING 1. Function settings (for indoor unit).............05-1 1-1. Function settings by using remote controller ..............05-1 2. Function settings (for 24-36 outdoor units) ..........05-10 2-1. Control PCB and switch buttons location..............05-10 2-2. Local setting procedure ....................05-12 3. External input and output (for indoor unit) ..........05-14 3-1.

  • Page 183: Function Settings (For Indoor Unit)

    1. Function settings (for indoor unit) To adjust the functions of this product according to the installation environment, various types of function settings are available. NOTE: Incorrect settings can cause a product malfunction. 1-1. Function settings by using remote controller Some function settings can be changed on the remote controller.
  • Page 184 1) Filter sign Select appropriate intervals for displaying the filter sign on the indoor unit according to the estimated amount of dust in the air of the room. If the indication is not required, select "No indication" (03). Function number Setting value Setting description Factory setting...
  • Page 185 5) Room temperature control for indoor unit sensor Depending on the installed environment, 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.
  • Page 186 6) Room temperature control for wired remote controller sensor Depending on the installed environment, correction of the wire remote temperature sensor may be required. Select the appropriate control setting according to the installed environment. To change this setting, set Function 42 to “Both“ (01). Ensure that the Thermo Sensor icon is displayed on the remote controller screen.
  • Page 187 9) Remote controller custom code (Only for wireless remote controller) The indoor unit custom code can be changed. Select the appropriate custom code. Function number Setting value Setting description Factory setting ♦ 10) External input control "Operation/Stop" mode or "Forced stop" mode can be selected. Function number Setting value Setting description...
  • Page 188 13) Switching functions for external output terminal Functions of the external output terminal can be switched. For details, refer to “External input and output”. Function number Setting value Setting description Factory setting Operation status ♦ 01—04 Cooling thermostat On Heating operation Operation/Stop 07—08 Cooling thermostat On...
  • Page 189 15) Operating temperature switching of external heaters Sets the temperature conditions when the external heater is ON. For details, refer to “External heater output” in "Details of control output function" on page 05-24. Setting description Setting value of function 61: Function Setting Factory...
  • Page 190 17) Outdoor temperature zone boundary temperature B Setting required if changing of the outdoor temperature setting for heat pump only zone is required when auxiliary heater control by outdoor temperature 1 and 3 is performed on the indoor unit. For details, refer to “External heater output” in "Details of control output function"...
  • Page 191 21) External heater use in defrosting Enables or disables external heater use in defrosting. NOTE: Inappropriate heater selection may cause cold air in defrosting. Function number Setting value Setting description Factory setting Disable ♦ Enable 22) Fixed operation mode switching Sets the operation mode to heat pump, heating only, or cooling only.

  • Page 192: Function Settings (For 24-36 Outdoor Units)

    2. Function settings (for 24-36 outdoor units) Perform appropriate function setting locally according to the installation environment. NOTE: Incorrect settings can cause a product malfunction. CAUTION • Before setting up the switch buttons, discharge the static electricity from your body. •...
  • Page 193 ¢ Switch buttons and the functions LED lamps S134 S133 S132 S131 S130 Switch buttons LED lamp Function or operation method Lights on while power on. (1) PO→ER/MODE Green Blinks to show the local setting on the outdoor unit or the error code. (2) ERROR Blinks during error operation.

  • Page 194: Local Setting Procedure

    2-2. Local setting procedure NOTE: Before performing the function setting, be sure to stop the operation of the air conditioner. ¢ Low noise mode Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of PO→ER/MODE blinks 9 times, press the ENTER switch but- ton (S132).
  • Page 195 ¢ Peak cut mode Press the MODE switch button (S134) for 3 seconds or more to switch to “Local setting mode”. After confirming the LED lamp of PO→ER/MODE blinks 9 times, press the ENTER switch but- ton (S132). PUMP POWER LOW NOISE PEAK CUT DOWN...

  • Page 196: External Input And Output (For Indoor Unit)

    3. External input and output (for indoor unit) Rotary switch CN65 Terminal CN48 CN75 CN47 (External in) (IR receiver) (External out) Fig. Indoor unit PCB Fig. External input and output PCB Connecting point Input/Output Function Input select Input signal Operation/Stop Terminal Input Dry contact...

  • Page 197: External Input

    3-1. External input • “Operation/Stop” mode or "Forced stop" mode can be selected with function setting of indoor unit. • A twisted pair cable (22 A→G) should be used. Maximum length of cable is 492 ft (150 m). • Use an external input and output cable with appropriate external dimension, depending on the number of cables to be installed.
  • Page 198 ¢ Input signal type • Indoor unit Input signal type is only "Edge". Edge • External Input and Output PCB The input signal type can be selected. Signal type (edge or pulse) can be switched by the DIP switch 2 (S→2) on the External Input and Output PCB.

  • Page 199: External Output

    3-2. External output Use an external output cable with appropriate external dimension, depending on the number of ca- bles to be installed. ¢ Indoor unit • A twisted pair cable (22 A→G) should be used. Maximum length of cable is 82 ft (25 m). •...

  • Page 200: Setting Of External Input And Output

    3-3. Setting of external input and output • Indoor unit Input Connection point Function setting number 46 Function Operation/Stop mode 1 (Setting prohibited) Terminal Forced stop mode Operation/Stop mode 2 Output Connection point Function setting number 60 Function Operation/Stop 01—04 Cooling thermostat On Heating thermostat On Operation/Stop...
  • Page 201 • External Input and Output PCB Switch setting Ex IN Ex OUT Rotary switch Edge Operation/Stop Not available Indoor unit fan Operation/Stop Error status operation Pulse Operation Stop status Indoor unit fan Forced External heater Not available Error status operation thermostat off output status...

  • Page 202: Details Of Control Input Function

    3-4. Details of control input function ¢ Operation/Stop mode 1 • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary switch Operation — Input of indoor unit Terminal Stop 46-00 Operation External Input and Edge...
  • Page 203 ¢ Forced stop • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary switch Forced stop (R.C. disabled) — Input of indoor unit Terminal Normal (R.C. enabled) 46-02 Forced stop (R.C.
  • Page 204 ¢ Operation/Stop mode 2 • In the case of "Edge" input External Input and Output PCB Function External input Input signal Command setting Rotary switch Operation (R.C. enabled) — Input of indoor unit Terminal Stop (R.C. disabled) 46-03 Operation (R.C. enabled) External Input and Edge Ex IN 1...
  • Page 205 ¢ Forced thermostat off External Input and Output External input Input signal Command Rotary switch Thermostat off External Input and 2, B, C, D Ex IN 1 Output PCB Normal operation Thermostat off External Input and 4, 7, 8, A Ex IN 1 Output PCB Normal operation...

  • Page 206: Details Of Control Output Function

    3-5. Details of control output function ¢ Operation status External Input and Function Output PCB External output Output signal Status setting Rotary switch Operation 60-00 — Output of indoor unit CN47 60-06 Stop Operation External Input and — 1, B, C, D Ex OUT 1 Output PCB Stop...
  • Page 207 ¢ Indoor unit fan operation status External Input and Function Output PCB External output Output signal Status setting Rotary switch Fan run 60-10 — Output of indoor unit CN47 Fan stop Fan run External Input and — 2, 3, 7, 8, B, D Ex OUT 2 Output PCB Fan stop...
  • Page 208 ¢ External heater output External Input and Function Output PCB External output Output signal Control setting Rotary switch Heater on 60-11 — Output of indoor unit CN47 Heater off Heater on External Input and — 2, B, C Ex OUT 3 Output PCB Heater off Output signal...
  • Page 209 • Design and install external heater appropriately with considering its protection. • Inappropriate designing and installation of external heater may cause a fire by emitted heat from the external heater. • Fujitsu General Ltd. is not responsible for inappropriate designing or installation of external heating device. - (05-27) - 3-5.
  • Page 210  Auxiliary equipment control by room temperature Auxiliary equipment control is switchable by room temperature. Auxiliary equipment switching is per- formed for each room temperature divided to following 3 zones. Zone A Ts +0.9°F (0.5 °C) Ts: Setting temperature Ts -0.9°F (-0.5 °C) Tr: Room temperature Zone B Zone C...
  • Page 211  Auxiliary heater control 1 Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. • Heater is off as shown in following diagram of heating temperature. • Other than heating mode Heater off • Error occurred •...
  • Page 212  Heat pump prohibition control Perform heating by external heater only. Indoor unit is continuous thermostat off. Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. • Heater is off as shown in following diagram of heating temperature. •...
  • Page 213  Auxiliary heater control by outdoor temperature 1 This control selects heat pump or external heater according to the outdoor temperature. →hen out- door temperature is high, the heating is performed by using heat pump only. Operation Condition Heater on Heater is on as shown in following diagram of heating temperature.
  • Page 214 • Operation status 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Heat pump Heat pump Combination zone only zone prohibition zone Outdoor temperature zone * Comp. On/Off 12 V Heater * The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 215  Auxiliary heater control by outdoor temperature 2 This control selects heat pump or external heater according to the outdoor temperature. Even when outdoor temperature is high, the heating is performed by using both of heat pump and external heater. Operation Condition Heater on...
  • Page 216 • Operation status 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Heat pump prohibition Combination zone zone Outdoor temperature zone * Comp. On/Off 12 V Heater * The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 217  Auxiliary heater control by outdoor temperature 3 This control selects heat pump or external heater according to the outdoor temperature. Even when outdoor temperature is high, the heating is performed by using both of heat pump and external heater. Operation Condition Heater on...
  • Page 218 • Operation status Heat pump only zone 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Combination zone Outdoor temperature zone * Comp. On/Off 12 V Heater * The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 219  Auxiliary heat pump control • External heater output Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. • Heater is off as shown in following diagram of heating temperature. • Other than heating mode Heater off •...
  • Page 220  Auxiliary heat pump control by outdoor temperature 1 • External heater output Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. • Heater is off as shown in following diagram of heating temperature. •...
  • Page 221 • Operation status 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Heat pump prohibition Combination zone zone Outdoor temperature zone * Comp. On/Off 12 V Heater * The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 222  Auxiliary heat pump control by outdoor temperature 2 • External heater output Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. • Heater is off as shown in following diagram of heating temperature. •...
  • Page 223 • Operation status Heat pump prohibition zone 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Combination zone Outdoor temperature zone * Comp. On/Off 12 V Heater * The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 224  Auxiliary heat pump control by outdoor temperature 3 • External heater output Operation Condition Heater on Heater is on as shown in following diagram of heating temperature. • Heater is off as shown in following diagram of heating temperature. •...
  • Page 225 • Operation status Heat pump prohibition zone 46.4°F (8°C) 42.8°F (6°C) Outdoor temperature (Factory setting) -0.4°F (-18°C) -4°F (-20°C) Combination zone Outdoor temperature zone * Comp. On/Off 12 V Heater * The outdoor temperature zone transition from one to another will stay in that zone for minimum of 30 min. NOTE: In following operations, compressor will be on in heat pump prohibition zone.
  • Page 226 ¢ Heating thermostat on for humidifier Indoor unit Function External output setting Situation Mode Rotary SW Heating Indoor unit fan Heating thermostat on operation thermostat on no. 60 status 60-05 CN47 Example of 60-06 Output 3 individual Not used 60-07 Output 2 connection 60-08...

  • Page 227: External Input And Output (For 24-36 Outdoor Units)

    4. External input and output (for 24-36 outdoor units) →ith using external input and output functions, this product can be operated inter-connectedly with an external device. Connector Input Output Remarks P580 Low noise mode — PA580 Peak cut mode — See external input/output settings for details.
  • Page 228 ¢ Peak cut mode By performing following on-site work, operation that suppresses the current value can be enabled: The air conditioner is set to the “Peak cut mode” when closing the contact input of a commercial timer or on/off switch to a connector on the control PCB of the outdoor unit. •...

  • Page 229: External Output

    4-2. External output →ith using external output function, some status signals are transmitted to the control PCB, and the related LED lamp indicates the status of this product. ¢ Error status output Signal on air conditioner error status is generated when a malfunction occurs. •...
  • Page 230 ¢ Compressor status output Signal on compressor operation status is generated when the compressor is running. • Circuit diagram example • Output voltage (Vcc): DC 12 Outdoor unit V 50 mA or less control PCB Connected unit (Locally purchased) • *: Make the distance from Example: Connector...

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