Download
Share
Print this page
Fujitsu GENERAL ASHH07KLTA Service Manual
  1. Manuals
  2. Brands
  3. Fujitsu Manuals
  4. Air Conditioner
  5. GENERAL ASHH07KLTA
  6. Service manual
Fujitsu GENERAL ASHH07KLTA Service Manual

Fujitsu GENERAL ASHH07KLTA Service Manual

Wall mounted type, indoor/outdoor
Hide thumbs

Advertisement

Quick Links

Download this manual
AIR CONDITIONER
Wall mounted type
INDOOR
OUTDOOR
AOHH07KLTA
AOHH09KLTA
AOHH12KLTA
SERVICE MANUAL
ASHH07KLTA
ASHH09KLTA
ASHH12KLTA
SR_AS124EG_02
2024.01.12

Advertisement

loading
Need help?

Need help?

Do you have a question about the GENERAL ASHH07KLTA and is the answer not in the manual?

Questions and answers

Related Manuals for Fujitsu GENERAL ASHH07KLTA

Summary of Contents for Fujitsu GENERAL ASHH07KLTA

  • Page 1 AIR CONDITIONER Wall mounted type SERVICE MANUAL INDOOR ASHH07KLTA ASHH09KLTA ASHH12KLTA OUTDOOR AOHH07KLTA AOHH09KLTA AOHH12KLTA SR_AS124EG_02 2024.01.12...
  • 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, 2024 Fujitsu General Limited. All rights reserved.

  • Page 3: General Information

    CONTENTS 1. GENERAL INFORMATION 2. TECHNICAL DATA AND PARTS LIST 3. TROUBLESHOOTING 4. CONTROL AND FUNCTIONS 5. FILED WORKING...
  • Page 5 1. GENERAL INFORMATION 2023.12.20 SR_CH01_AS124EG_01...

  • Page 6: Table Of Contents

    CONTENTS 1. GENERAL INFORMATION 1. Specifications....................01-1 1-1. Indoor unit ........................01-1 1-2. Outdoor unit........................01-3 2. Dimensions....................01-5 2-1. Indoor unit ........................01-5 2-2. Outdoor unit........................01-7...

  • Page 7: Specifications

    1. Specifications 1-1. Indoor unit Wall mounted Type Inverter, Heat pump Model name ASHH07KLTA ASHH09KLTA ASHH12KLTA Power supply 230 V~ 50 Hz Power supply intake Outdoor unit Available voltage range 198—264 V k→ Rated Btu/h 6,800 8,500 11,600 Cooling k→ 0.9—2.8 0.9—3.0 0.9—3.7...
  • Page 8 Wall mounted Type Inverter, Heat pump Model name ASHH07KLTA ASHH09KLTA ASHH12KLTA °C 18 to 32 Cooling Operation range 80 or less Heating °C 16 to 30 Remote controller →ireless (Option: Mobile app* [AIRSTAGE Mobile]) NOTES: • Specifications are based on the following conditions: –...

  • Page 9: Outdoor Unit

    1-2. Outdoor unit Type Inverter, Heat pump Model name AOHH07KLTA AOHH09KLTA AOHH12KLTA Power supply 230 V~ 50 Hz Power supply intake Outdoor unit Available voltage range 198—264 V Starting current Cooling 1,650 1,700 Airflow rate Heating 1,450 1,470 Type × Qty Propeller fan ×...
  • Page 10 - (01-4) - 1-2. Outdoor unit 1. Specifications...

  • Page 11: Dimensions

    2. Dimensions 2-1. Indoor unit ¢ Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA Unit: mm 230.6 230.6 Outline of indoor unit for pipe inlet Ø65 for pipe inlet Ø65 317.6 306.6 - (01-5) - 2-1. Indoor unit 2. Dimensions...

  • Page 12: Installation Space Requirement

     Installation space requirement Provide sufficient installation space for product safety. Unit: mm Wall hook bracket 40 or more 30 or more 176 or more 203 or more Outline of the indoor unit 1,500 or more - (01-6) - 2-1. Indoor unit 2.

  • Page 13: Outdoor Unit

    2-2. Outdoor unit ¢ Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA Unit: mm 4-M10 hole Pitch of bolts for installation Top view Side view Front view Side view Airflow Drain port Ø42 Bottom view Side view (Valve part) - (01-7) - 2-2. Outdoor unit 2.
  • Page 14 - (01-8) - 2-2. Outdoor unit 2. Dimensions...
  • Page 15 2. TECHNICAL DATA AND PARTS LIST 2024.01.12 SR_CH02_AS124EG_02...
  • Page 16 CONTENTS 2. TECHNICAL DATA AND PARTS LIST 1. Precautions....................02-1 2. Indoor unit parts list..................02-2 2-1. Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA ..........02-2 3. Outdoor unit parts list.................02-6 3-1. Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA .........02-6 4. Accessories ....................02-10 4-1. Indoor unit ........................02-10 4-2.

  • Page 17: Precautions

    • 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 18: Indoor Unit Parts List

    2. Indoor unit parts list 2-1. Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA ¢ Exterior parts - (02-2) - 2-1. Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA 2. Indoor unit parts list...
  • Page 19 Item no. Part no. Part name Service part 9388959009 Bracket panel ♦ 9387597134 →ire cover assy ♦ 9333888026 Louver assy (Up/Down) ♦ 9334098004 Remote controller holder ♦ 9358365090 Remote controller assy ♦ 9333886213 Front panel total assy ♦ 9388953007 Air filter ♦...
  • Page 20 ¢ Chassis - (02-4) - 2-1. Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA 2. Indoor unit parts list...
  • Page 21 Item no. Part no. Part name Service part 9387593570 Evaporator total assy (for 07 and 09 models) ♦ 9387593563 Evaporator total assy (for 12 model) ♦ 9388951003 Room thermistor holder ♦ 9383765117 →LAN adapter holder assy ♦ 9900369071 Terminal ♦ 9901160066 Thermistor assy ♦...

  • Page 22: Outdoor Unit Parts List

    3. Outdoor unit parts list 3-1. Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA ¢ Exterior parts and chassis - (02-6) - 3-1. Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA 3. Outdoor unit parts list...
  • Page 23 Item no. Part no. Part name Service part 9322556189 Top panel assy ♦ 9388971001 Heat sink ♦ 9709689394 Main PCB (for 07 model) ♦ 9709689400 Main PCB (for 09 model) ♦ 9709689417 Main PCB (for 12 model) ♦ 9900727178 Thermistor assy ♦...
  • Page 24 ¢ Compressor - (02-8) - 3-1. Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA 3. Outdoor unit parts list...
  • Page 25 Item no. Part no. Part name Service part 9388992006 Compressor assy (for 07 and 09 model) ♦ 9388992020 Compressor assy (for 12 model) ♦ 9322392039 4-way valve assy ♦ 9970110153 Solenoid ♦ 9970222009 Expansion valve coil ♦ 9322403001 Pulse motor valve ♦...

  • Page 26: Accessories

    4. Accessories 4-1. Indoor unit ¢ Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA Part name Exterior Part name Exterior Self-tapping screw Operation manual (Large) Operation manual Self-tapping screw (CD-ROM) (Small) Installation manual →all hook bracket Remote controller Battery Remote controller holder 4-2. Outdoor unit ¢...

  • Page 27: Optional Parts

    5. Optional parts 5-1. Indoor unit Exterior Part name Model name Summary Air Cleaning Air Cleaning Filter can be mounted to UTR-FA16-5 Filter the indoor unit. Remotely manage an air conditioning system using mobile devices such as smartphones and tablets. UT↔-TFS↓F2 Appropriate application for each region →LAN Adapter...

  • Page 28: Refrigerant System Diagrams

    6. Refrigerant system diagrams 6-1. Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA Heat exchanger 3-way 2-way (INDOOR) valve valve Muffler Muffler 4-way valve Strainer Expansion valve Heat exchanger Strainer (OUTDOOR) Cooling Heating : Thermistor (Discharge temperature) : Thermistor (Heat exchanger middle temperature) : Thermistor (Outdoor temperature) : Thermistor (Heat exchanger out temperature) : Thermistor (Pipe temperature)

  • Page 29: Wiring Diagrams

    7. Wiring diagrams 7-1. Indoor unit ¢ Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA - (02-13) - 7-1. Indoor unit 7. →iring diagrams...

  • Page 30: Outdoor Unit

    7-2. Outdoor unit ¢ Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA - (02-14) - 7-2. Outdoor unit 7. →iring diagrams...

  • Page 31: Pc Board Diagrams

    8. PC board diagrams 8-1. Models: ASHH07KLTA, ASHH09KLTA, and ASHH12KLTA CONTROL UNIT 07 model: EZ-0230LHSE 09 model: EZ-0230KHSE 12 model: EZ-0230HHSE TERMINAL AWG16 BLACK AWG16 WHITE OUTDOOR UNIT POWER SUPPLY 230 V AWG22 RED 50 Hz MAIN PCB AWG22 GREEN 07 model: K23AL-2306HSE-C1 EARTH AWG16 GREEN...

  • Page 32: Models: Aohh07Klta, Aohh09Klta, And Aohh12Klta

    8-2. Models: AOHH07KLTA, AOHH09KLTA, and AOHH12KLTA CONTROL UNIT 07, 09 models: EZ-023LHUE Winding Resistance 12 model: EZ-023KHUE 3.360 Ω (20°C) EMI FILTER TR-28-16-13 FG F8C T 28*13*16-C 3 TURNS UL3271 AWG16 COMPRESSOR TO INDOOR UNIT W400 UL3271 AWG16 W401 WHITE WHITE EMI FILTER UL3271 AWG16...

  • Page 33: Troubleshooting

    3. TROUBLESHOOTING 2024.01.12 SR_CH03_AS124EG_01...
  • Page 34 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 (Indoor unit)..................03-2 2. Troubleshooting with error code ...............03-3 2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit).....03-3 2-2.

  • Page 35: Error Code

    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 36: Error Code Table (Indoor Unit)

    1-3. Error code table (Indoor unit) The operation, timer, and economy indicators operate according to the error contents. For confirmation of the error contents, refer the flashing pattern as follows. Indoor unit display Error contents Operation [ ] Timer [ ] Economy [ ] (Green) (Orange)

  • Page 37: Troubleshooting With Error Code

    2. Troubleshooting with error code 2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit) Operation indicator 1 time flash Timer indicator 1 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 11 Main PCB →hen the indoor unit cannot receive the serial signal from outdoor unit more than 2 minutes after power on, Detective actuator...
  • Page 38 Check point 4. Check serial signal (Reverse transfer signal) Check serial signal (Reverse transfer signal) BLACK WHITE • Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1 —3. • If it is abnormal, check the parts below. –...

  • Page 39: E: 11. Serial Communication Error (Serial Forward Transfer Error) (Indoor Unit)

    2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) Operation indicator 1 time flash Timer indicator 1 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 11 Main PCB Indoor unit →hen the outdoor unit cannot properly receive the serial Detective actuator Fan motor signal from indoor unit for 10 seconds or more.
  • Page 40 Check point 4. Check serial signal (Forward transfer signal) Check serial signal (Forward transfer signal) 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 41: E: 32. Indoor Unit Main Pcb Error (Indoor Unit)

    2-3. E: 32. Indoor unit main PCB error (Indoor unit) Operation indicator 3 time flash Timer indicator 2 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 32 →hen power is on and there is some below case. Detective actuator Indoor unit Main PCB...

  • Page 42: E: 35. Manual Auto Button Error (Indoor Unit)

    2-4. E: 35. MANUAL AUTO button error (Indoor unit) Operation indicator 3 time flash Timer indicator 5 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 35 Indoor unit controller PCB →hen the MANUAL AUTO button becomes on for Detective actuator Indicator PCB consecutive 60 or more seconds.

  • Page 43: E: 41. Room Temperature Sensor Error (Indoor Unit)

    2-5. E: 41. Room temperature sensor error (Indoor unit) Operation indicator 4 time flash Timer indicator 1 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 41 Indoor unit main PCB Room temperature thermistor is open or short is Detective actuator detected always.

  • Page 44: E: 42. Indoor Unit Heat Exchanger Sensor Error (Indoor Unit)

    2-6. E: 42. Indoor unit heat exchanger sensor error (Indoor unit) Operation indicator 4 time flash Timer indicator 2 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 42 Indoor unit main PCB →hen heat exchanger temperature thermistor open or Detective actuator Heat exchanger temperature short circuit is detected.

  • Page 45: E: 51. Indoor Unit Fan Motor Error (Indoor Unit)

    2-7. E: 51. Indoor unit fan motor error (Indoor unit) Operation indicator 5 time flash Timer indicator 1 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 51 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...

  • Page 46: E: 62. Outdoor Unit Main Pcb Error (Outdoor Unit)

    2-8. E: 62. Outdoor unit main PCB error (Outdoor unit) Operation indicator 6 time flash Timer indicator 2 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 62 Access to EEPROM failed due to some cause after Detective actuator Outdoor unit Main PCB...

  • Page 47: E: 64. Pfc Circuit Error (Outdoor Unit)

    2-9. E: 64. PFC circuit error (Outdoor unit) Operation indicator 6 time flash Timer indicator 4 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 64 • →hen inverter input DC voltage is higher than 415 V for over 3 seconds, the compressor stops. Detective actuator Outdoor unit Main PCB...

  • Page 48: E: 65. Ipm Error (Outdoor Unit)

    2-10. E: 65. IPM error (Outdoor unit) Operation indicator 6 time flash Timer indicator 5 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 65 Main PCB 1. →hen more than normal operating current to IPM in main PCB flows, the compressor stops.
  • Page 49 Check point 4. Check compressor Check compressor. (Refer to inverter compressor in "Service parts information".) Check point 5. Replace main PCB If Check point 1 to 4 do not improve the symptom, change main PCB. - (03-15) - 2-10. E: 65. IPM error (Outdoor unit) 2.

  • Page 50: E: 71. Discharge Thermistor Error (Outdoor Unit)

    2-11. E: 71. Discharge thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 1 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 71 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...

  • Page 51: E: 73. Outdoor Unit Heat Exchanger Thermistor Error (Outdoor Unit)

    2-12. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 3 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 73 Outdoor unit main PCB →hen heat exchanger temperature thermistor open or Detective actuator short circuit is detected at power on or while running the Heat exchanger temperature...

  • Page 52: E: 74. Outdoor Temperature Thermistor Error (Outdoor Unit)

    2-13. E: 74. Outdoor temperature thermistor error (Outdoor unit) Operation indicator 7 time flash Timer indicator 4 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 74 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...

  • Page 53: E: 84. Current Sensor Error (Outdoor Unit)

    2-14. E: 84. Current sensor error (Outdoor unit) Operation indicator 8 time flash Timer indicator 4 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 84 →hen input current sensor has detected 0 A, while inverter compressor is operating at higher than 56 rps, Detective actuator Outdoor unit Main PCB...

  • Page 54: E: 94. Trip Detection (Outdoor Unit)

    2-15. E: 94. Trip detection (Outdoor unit) Operation indicator 9 time flash Timer indicator 4 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 94 Main PCB Protection stop by over-current generation after inverter compressor start processing completed generated consecutively 10 times.

  • Page 55: E: 95. Compressor Motor Control Error (Outdoor Unit)

    2-16. E: 95. Compressor motor control error (Outdoor unit) Operation indicator 9 time flash Timer indicator 5 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 95 Main PCB 1. →hen running the compressor, if the detected rotor location is out of phase with actual rotor location more than 90°, the compressor stops.

  • Page 56: E: 97. Outdoor Unit Fan Motor Error (Outdoor Unit)

    2-17. E: 97. Outdoor unit fan motor error (Outdoor unit) Operation indicator 9 time flash Timer indicator 7 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 97 Main PCB 1. →hen outdoor fan rotation speed is less than 100 rpm in 20 seconds after fan motor starts, fan motor stops.

  • Page 57: E: 99. 4-Way Valve Error (Outdoor Unit)

    2-18. E: 99. 4-way valve error (Outdoor unit) Operation indicator 9 time flash Timer indicator 9 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: 99 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,...
  • Page 58 Check point 3. Check the solenoid coil and 4-way valve Solenoid coil • Remove CN30 from PCB and check the resistance value of coil. Resistance value is about 2.085 kΩ (at 20°C). If it is open or abnormal resistance value, replace solenoid coil. •...

  • Page 59: E: A1. Discharge Temperature Error (Outdoor Unit)

    2-19. E: A1. Discharge temperature error (Outdoor unit) Operation indicator 10 time flash Timer indicator 1 time flash Indicator Indoor unit Economy indicator Continuous flash Error code E: A1 Outdoor unit main PCB Protection stop by discharge temperature ≥ 110°C Detective actuator during compressor operation generated 2 times within Discharge temperature thermistor...
  • Page 60 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. - (03-26) - 2-19. E: A1. Discharge temperature error (Outdoor unit) 2.

  • Page 61: 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 62: 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 63: 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 Are these indoor unit, outdoor unit, and remote controller suitable model names to connect? ->...

  • Page 64: 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 65 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 66: 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 67: 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 68: 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 69: Inverter Compressor

    4-2. Inverter compressor 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 70: Outdoor Unit Electronic Expansion Valve (Eev)

    4-3. Outdoor unit Electronic Expansion Valve (EEV) 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 02-13. Check point 2.
  • Page 71 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 72: 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 73: 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 74: 4-Way Valve Coil (Solenoid Coil)/4-Way Valve

    4-6. 4-way valve coil (solenoid coil)/4-way valve Check point 1. Check connection • Check the connection of connector P60. BLUE SOLENOID COIL Check Point 2 : Check Solenoid Coil Remove P60 from PCB and check the resistance value of coil. Resistance Value ≈...

  • Page 75: Thermistor Resistance Values

    5. Thermistor resistance values 5-1. Indoor unit ¢ Room temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -10.0 58.25 0.73 -5.0 44.03 0.93 33.62 1.15 25.93 1.39 10.0 20.18 1.66 15.0 15.84 1.94 20.0 12.54 2.22 25.0 10.00 2.50 30.0 8.04 2.77 35.0...

  • Page 76: Outdoor Unit

    5-2. Outdoor unit ¢ Discharge temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 1,013.11 0.06 -25.0 729.09 0.09 -20.0 531.56 0.12 -15.0 392.31 0.16 -10.0 292.91 0.21 -5.0 221.09 0.28 168.60 0.36 129.84 0.46 10.0 100.91 0.57 15.0 79.12 0.71 20.0 62.55...
  • Page 77 ¢ Heat exchanger temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 95.58 0.24 -25.0 68.90 0.32 -20.0 50.31 0.43 -15.0 37.19 0.57 -10.0 27.81 0.73 -5.0 21.02 0.92 16.05 1.14 12.38 1.39 10.0 9.63 1.65 15.0 7.56 1.93 20.0 5.98 2.21 25.0...
  • Page 78 ¢ Outdoor temperature thermistor Temperature (°C) Resistance (kΩ) Voltage (V) -30.0 224.33 0.73 -25.0 159.71 0.97 -20.0 115.24 1.25 -15.0 84.21 1.56 -10.0 62.28 1.90 -5.0 46.58 2.26 35.21 2.61 26.88 2.94 10.0 20.72 3.25 15.0 16.12 3.52 20.0 12.64 3.76 25.0 10.00...

  • Page 79: Control And Functions

    4. CONTROL AND FUNCTIONS 2024.01.12 SR_CH04_AS124EG_01...
  • Page 80 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 ............04-4 1-5. Limitation of compressor rotation number by outdoor temperature.........04-5 2.

  • Page 81: Rotation Number Control Of Compressor

    1. Rotation number control of compressor 1-1. Cooling operation A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation rotation number of the compressor. •...
  • Page 82 • Limit of maximum speed based on outdoor temperature Outdoor temperature rises Outdoor temperature drops 36°C A zone 34°C 32°C B zone 30°C 21°C C zone 19°C 12°C D zone 10°C 2°C E zone 0°C F zone Unit: rps Indoor unit fan mode Outdoor Model name temperature zone...

  • Page 83: Heating Operation

    1-2. Heating operation A sensor (room temperature thermistor) built in indoor unit body will usually perceive difference or variation between setting temperature and present room temperature, and controls operation rota- tion number of compressor. • If the room temperature is 6.0°C lower than a set temperature, the operation rotation number of compressor will attain to maximum performance.

  • Page 84: Dry Operation

    1-3. Dry operation The rotation number of compressor shall change according to the temperature, set temperature, and room temperature variation which the room temperature sensor of the indoor unit has detected as shown in the table below. Zone is defined by set temperature and room temperature. •...

  • Page 85: Limitation Of Compressor Rotation Number By Outdoor Temperature

    1-5. Limitation of compressor rotation number by outdoor temperature The minimum rotation number of compressor is limited by outdoor temperature as below. • Cooling/Dry mode F zone 38°C E zone 19°C D zone 10°C C zone 0°C B zone -10°C A zone Unit: rps Limitation of compressor...

  • Page 86: 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 18°C and 30°C in 1.0°C steps.

  • Page 87: Operation Flow Chart

    Operation flow chart Start Ts: Setting temperarure Monitor mode Room temp. > Ts+2°C? Room temp. < Ts-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 88: 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 mode Fan mode ASHH07KLTA ASHH09KLTA ASHH12KLTA PO→ERFUL 1,330 1,360 1,380 HIGH 1,230 1,260 1,310 MED+ 1,140 1,160...

  • Page 89: Cooling Operation

    ¢ 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 QUIET, LO→, MED, HIGH as shown in “Fan speed” above. Airflow change over (Cooling: Auto) Tr - Ts ≥...
  • Page 90 ¢ Cool air prevention control (heating mode) The maximum 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 Indoor heat exchanger temperature rises Indoor heat exchanger HIGH...
  • Page 91 • Powerful operation Indoor heat exchanger temperature rises Indoor heat exchanger POWERFUL temperature drops 42°C 37°C HIGH 39°C 34°C 37°C 32°C Cool air prevention 30°C 28°C S-LOW 7 minutes later: Indoor heat exchanger temperature rises Indoor heat exchanger POWERFUL temperature drops 42°C 37°C HIGH...

  • Page 92: 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  Models: AOHH07KLTA and AOHH09KLTA Fan speed is defined by outdoor temperature and rotation number of the compressor. •...
  • Page 93  Model: AOHH12KLTA Fan speed is defined by outdoor temperature and rotation number of the compressor. • Outside air temperature zone selection Outside air Outside air temperature rises temperature drops Y zone 21°C 19°C Z zone 12°C 10°C F zone 2°C 0°C G zone...

  • Page 94: Louver Control

    4. Louver control 4-1. Horizontal louver control Each time the button is pressed, the airflow direction range will change as below: Side view • Remote controller display is not changed. • Up/down airflow direction is set automatically as shown, in accordance with the type of operation selected.

  • Page 95: 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 96: Sleep Timer

    ¢ 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 97: 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 98: 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 99: 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 100: Forced Cooling Operation

    7-3. Forced cooling operation The outdoor unit may not operate depending on the room temperature. →hen FORCED COOLING OPERATION button is pressed more than 10 seconds, forced cooling operation starts as shown in the table below. Operation mode Cooling Fan mode HIGH Timer mode Continuous (no timer setting available)

  • Page 101: Fresh Air Control

    7-6. 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 7-7. Compressor preheating By preheating the compressor, warm airflow is quickly discharged when the operation is started. •...

  • Page 102: 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. Retry number Retry set number →hen the compressor fails to start in the retry set number above, the compressor is stopped. 7-11.

  • Page 103: 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 104: 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 105: Low Outdoor Temperature Protection

    8-5. Low outdoor temperature protection →hen the outdoor temperature sensor detects lower than the trigger condition below, the compres- sor is stopped. Operation mode Cooling/Dry Trigger condition -15°C Release condition -10°C 8-6. High temperature and high pressure release control The compressor is controlled as follows. ¢...
  • Page 106 - (04-26) - 8-6. High temperature and high pressure release control 8. Various protections...
  • Page 107 5. FILED WORKING 2024.01.12 SR_CH05_AS124EG_01...
  • Page 108 CONTENTS 5. FILED WORKING 1. Function settings ..................05-1 1-1. Function settings by using remote controller ..............05-1 1-2. Custom code setting for wireless remote controller ............05-5...

  • Page 109: Function Settings By Using Remote Controller

    1. Function settings 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. After confirming the setting proce- dure and the content of each function setting, select appropriate functions for your installation envi- ronment.
  • Page 110 STEP 2: Selecting the function number and setting value 1. Press the TEMP./SELECT ( ) buttons to select the function Function number number. To switch between the left and right digits, press the MODE button. 2. Press the FAN SPEED button to proceed the setting value. To re- turn the function number selection, press the FAN SPEED button again.

  • Page 111: Contents Of Function Setting

    ¢ Contents of function setting Each function setting listed in this section is adjustable in accordance with the installation environ- ment. NOTE: Setting will not be changed if invalid numbers or setting values are selected.  Function setting list Function no. Functions Filter sign 30/31...

  • Page 112: Auto Restart

    2) 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 113: Custom Code Setting For Wireless Remote Controller

    5) 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 Disable Enable ♦...

This manual is also suitable for:

General ashh09kltaGeneral ashh12kltaGeneral aohh07kltaGeneral aohh09kltaGeneral aohh12klta