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AIR CONDITIONER
3-unit multi-split type
INDOOR
ASHG07–14KGTE
ABHG18KRTA
AGHG09–14KVCA
SERVICE MANUAL
AUXG07–18KVLA
ARXG07–14KSLAP
ASHG18KMTB
ASHG07–14KMTB
ASHG18KMTE
ASHG07–14KMCC
ASHG07–14KMCE
ARXG07–14KLLAP
ARXG18KSLAP
ARXG18KLLAP
ASHG07–14KETA
ASHG07–14KETE
OUTDOOR
ASHG07–14KGTB
ASHG07–14KETA-B
ASHG07–14KETE-B
AOHG18KBTA3
AOHG24KBTA3
SR_MU003EG_12
2022.08.08
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Chapters
Table of Contents
Troubleshooting
Related Manuals for Fujitsu iGENERAL AOHG24KBTA3
Summarization of Contents
1. GENERAL INFORMATION
1. Specifications
Technical specifications of the air conditioner units.
1-1. Indoor unit
Detailed specifications for indoor units.
2. Dimensions
Physical dimensions of the air conditioner units.
2-1. Compact cassette type
Dimensions for compact cassette indoor units.
2. TECHNICAL DATA AND PARTS LIST
1. Precautions
Important safety and handling precautions for service personnel.
2. Cassette grille (optional part) parts list
Parts list for the optional cassette grille.
2-1. Model: UTG-UFGF-W
Specific parts list for the UTG-UFGF-W model.
3. Indoor unit parts list
List of parts for indoor units.
3-1. Compact cassette type
Parts list for compact cassette indoor units.
4. Outdoor unit parts list
List of parts for outdoor units.
4-1. Models: AOHG18KBTA3 and AOHG24KBTA3
Specific parts list for AOHG18KBTA3 and AOHG24KBTA3 outdoor units.
7. Wiring diagrams
Electrical wiring diagrams for various unit types.
7-1. Compact cassette type
Wiring diagram for compact cassette type indoor units.
7. Wiring diagrams
7-2. Mini duct type and Slim duct type
Wiring diagrams for mini duct and slim duct type indoor units.
7-4. Ceiling type
Wiring diagram for ceiling type indoor units.
7-5. Floor type
Wiring diagram for floor type indoor units.
7-6. Outdoor unit
Wiring diagram for outdoor units.
8. PC board diagrams
8-1. Models: AUXG07KVLA, AUXG09KVLA, AUXG12KVLA, AUXG14KVLA, and AUXG18KVLA
PC board diagrams for specific indoor unit models.
3. TROUBLESHOOTING
1. Error code
Information on error codes displayed by the system.
1-1. How to check the error memory
Procedure to retrieve stored error codes from memory.
1-2. How to erase the error memory
Methods for clearing stored error codes from memory.
1-3. Error code table (Indoor unit and wired remote controller)
Table detailing error codes for indoor and wired remote units.
1-4. Error code table (Outdoor unit)
Table detailing error codes for outdoor units.
1-5. Error code table (Wireless LAN indicator)
Error codes indicated by the wireless LAN adapter LED.
1-6. Error code table (Mobile App)
Error codes displayed via the mobile application.
1-7. Error message for wireless LAN control (Mobile App)
Error messages displayed when using the mobile app for control.
2. Troubleshooting with error code
Detailed troubleshooting steps for specific error codes.
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit)
Troubleshooting for serial communication error (outdoor unit).
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit)
Troubleshooting for serial communication error (indoor unit).
2-3. E: 12. Wired remote controller communication error (Indoor unit)
Troubleshooting for wired remote controller communication errors.
2-4. E: 18. External communication error (Indoor unit)
Troubleshooting for external communication errors affecting the indoor unit.
2-8. E: 29. Connected unit number error (Indoor unit)
Troubleshooting for errors related to the number of connected indoor units.
2-9. E: 32. Indoor unit main PCB error (Indoor unit)
Troubleshooting for errors indicating a failure of the indoor unit's main PCB.
2-10. E: 33. Indoor unit motor electricity consumption detection error (Indoor unit)
Troubleshooting motor electricity consumption detection errors in indoor units.
2-11. E: 35. MANUAL AUTO button error (Indoor unit)
Troubleshooting errors related to the MANUAL AUTO button on indoor units.
2-12. E: 39. Indoor unit power supply error for fan motor (Indoor unit)
Troubleshooting power supply errors affecting the indoor unit fan motor.
2-13. E: 3A. Indoor unit communication circuit (wired remote controller) error
Troubleshooting communication circuit errors with wired remote controllers.
2-14. E: 41. Room temperature sensor error (Indoor unit)
Troubleshooting errors related to the room temperature sensor in indoor units.
2-15. E: 42. Indoor unit heat exchanger sensor error (Indoor unit)
Troubleshooting errors from the indoor unit's heat exchanger sensor.
2-16. E: 45. Refrigerant leakage sensor error (Indoor unit)
Troubleshooting errors detected by the refrigerant leakage sensor.
2-17. E: 45. Refrigerant leakage sensor deterioration (Indoor unit)
Troubleshooting refrigerant leakage sensor deterioration errors.
2-18. E: 51. Indoor unit fan motor error (Indoor unit)
Troubleshooting errors related to the indoor unit's fan motor.
2-19. E: 53. Drain pump error (Indoor unit)
Troubleshooting errors related to the indoor unit's drain pump.
2-20. E: 57. Damper (Open/Close) detection limit switch error
Troubleshooting errors from the damper's limit switch.
2-21. E: 57. Damper (Open/Close) simultaneous detection limit switch error (Indoor unit)
Troubleshooting simultaneous damper limit switch errors in indoor units.
2-22. E: 58. Intake grille error (Indoor unit)
Troubleshooting errors related to the intake grille of the indoor unit.
2-23. E: 5U. Indoor unit error
General troubleshooting for indoor unit errors.
2-24. E: 62. Outdoor unit model information error (Outdoor unit)
Troubleshooting errors related to outdoor unit model information.
2-25. E: 64. Active filter voltage error (Outdoor unit)
Troubleshooting active filter voltage errors in outdoor units.
2-26. E: 65. IPM error (Outdoor unit)
Troubleshooting IPM errors in outdoor units.
2-27. E: 71. Discharge thermistor error (Outdoor unit)
Troubleshooting discharge thermistor errors in outdoor units.
2-28. E: 72. Compressor thermistor error (Outdoor unit)
Troubleshooting compressor thermistor errors in outdoor units.
2-29. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit)
Troubleshooting heat exchanger thermistor errors in outdoor units.
2-30. E: 74. Outdoor temperature thermistor error (Outdoor unit)
Troubleshooting outdoor temperature thermistor errors in outdoor units.
2-31. E: 76. 2-way valve thermistor error (Outdoor unit)
Troubleshooting 2-way valve thermistor errors in outdoor units.
2-32. E: 76. 3-way valve thermistor error (Outdoor unit)
Troubleshooting 3-way valve thermistor errors in outdoor units.
2-33. E: 77. Heat sink thermistor error (Outdoor unit)
Troubleshooting heat sink thermistor errors in outdoor units.
2-34. E: 86. High pressure switch error (Outdoor unit)
Troubleshooting high pressure switch errors in outdoor units.
2-35. E: 94. Over current error (Outdoor unit)
Troubleshooting over current errors in outdoor units.
2-36. E: 95. Compressor motor control error (Outdoor unit)
Troubleshooting compressor motor control errors in outdoor units.
2-37. E: 97. Outdoor unit fan motor error (Outdoor unit)
Troubleshooting outdoor unit fan motor errors.
2-38. E: 99. 4-way valve error (Outdoor unit)
Troubleshooting 4-way valve errors in outdoor units.
2-39. E: 9A. Coil 1 (expansion valve 1) error
Troubleshooting errors related to expansion valve coil 1.
2-40. E: A1. Discharge temperature error (Outdoor unit)
Troubleshooting discharge temperature errors in outdoor units.
2-41. E: A3. Compressor temperature error (Outdoor unit)
Troubleshooting compressor temperature errors in outdoor units.
2-42. E: A8. Refrigerant leakage sensor error (Indoor unit)
Troubleshooting refrigerant leakage sensor errors in indoor units.
3. Troubleshooting without error code
3-1. Indoor unit—No power
Troubleshooting steps for indoor units with no power.
3-2. Outdoor unit—No power
Troubleshooting steps for outdoor units with no power.
3-3. No operation (Power is on)
Troubleshooting steps when the unit has power but no operation.
3-4. No cooling/No heating
Troubleshooting steps for units not providing cooling or heating.
3-5. Abnormal noise
Diagnosing and resolving abnormal noises from the unit.
3-6. Water leaking
Troubleshooting water leakage issues with the unit.
4. Troubleshooting with error code (For wireless LAN adapter)
4-1. E: 18. External communication error between indoor unit and WLAN adapter
Troubleshooting external communication errors with WLAN adapter.
4-2. Wireless LAN adapter error
Troubleshooting specific errors related to the wireless LAN adapter.
4-3. Network communication error between wireless LAN router and WLAN adapter
Troubleshooting network errors between router and WLAN adapter.
4-4. E: 18. Communication error
General communication error troubleshooting.
4-5. E: 18. Wireless LAN adapter non-energized
Troubleshooting when the wireless LAN adapter is not energized.
4-6. Mobile app setting method
Procedure for setting up and managing the air conditioner via mobile app.
4. CONTROL AND FUNCTIONS
1. Rotation number control of compressor
Control of compressor rotation speed based on conditions.
1-1. Cooling operation
Compressor rotation control during cooling mode.
2. Auto changeover operation
Automatic switching between operating modes.
3. Fan control
Control of fan speed and airflow.
3-1. Indoor fan control
Control methods for the indoor unit fan speed and airflow.
3-2. Outdoor fan control
Control methods for the outdoor unit fan speed.
4. Louver control
Control of horizontal and vertical louvers for airflow direction.
4-1. Horizontal louver control
Adjusting the horizontal airflow direction.
4-2. Vertical louver control
Adjusting the vertical airflow direction.
4-3. Adjust the horizontal louver
Manual adjustment of horizontal louvers for airflow.
4-4. Individual louver control
Independent control of airflow direction for each louver.
4-5. All louver control
Standard louver positions for different operation modes.
4-6. Swing operation
Operation of automatic louver swing for airflow direction.
5. Timer operation control
Control of various timer functions for operation scheduling.
5-1. Wireless remote control
Timer functions controllable via wireless remote.
5-2. Wired remote control
Timer functions controllable via wired remote.
6. Defrost operation control
Control logic for the defrost operation cycle.
6-1. Defrost operation in heating operation stopped
Defrost operation procedures when heating is stopped.
7. Various control
Various operational control features and modes.
7-1. Auto restart
Automatic restart function after power interruption.
7-2. MANUAL AUTO operation
Operation using the manual AUTO button without remote controller.
7-3. Forced cooling operation
Forced cooling operation mode and its cancellation.
7-4. 10 °C HEAT operation
Specific heating operation mode at 10°C.
7-5. ECONOMY operation
ECONOMY operation mode for energy saving.
7-6. POWERFUL operation
POWERFUL operation mode for maximum output.
7-8. Compressor preheating
Preheating the compressor for quick warm airflow.
7-9. External electrical heater control (For Compact cassette, Mini duct, Slim duct, KGTE, KMTE, KMCE, and KETE series wall mounted and Ceiling types)
Control of external electrical heaters for specific indoor unit types.
7-11. Drain pump control
Control logic for the drain pump during cooling operation.
7-12. Prevention to restart for 3 minutes (3 minutes st)
Mechanism preventing compressor restart for 3 minutes after failure.
7-13. 4-way valve control
Control logic for the 4-way valve during mode switching.
7-14. Human sensor for energy saving (For KGTB series and KGTE series wall mounted and Ceiling types)
Energy saving function utilizing human sensor for specific indoor units.
8. Various protections
Protective functions implemented in the air conditioner system.
8-1. Discharge gas temperature over-rise prevention control
Control to prevent excessive discharge gas temperature.
8-5. Compressor temperature protection
Protection mechanism against high compressor temperature.
8-6. High pressure protection
Protection mechanism against high pressure conditions.
8-8. High temperature and high pressure release control
Control logic for high temperature and pressure release.
5. FILED WORKING
1. Function settings (for indoor unit)
Settings and adjustments for indoor units.
1-1. Compact cassette, Mini duct, Slim duct types indoor unit (setting by DIP switch)
DIP switch settings for compact, mini duct, and slim duct indoor units.
1-2. Indoor unit (setting by wireless remote controller)
Function settings using a wireless remote controller.
1-3. Indoor unit (setting by wired remote controller)
Function settings using a wired remote controller.
1-4. Indoor unit (setting by simple remote controller)
Function settings using a simple remote controller.
1-5. Function details
Detailed explanations of various function settings.
1-6. Wired remote controller (UTY-RNNGM)
Details on the UTY-RNNGM wired remote controller.
1-7. Wired remote controller (UTY-RVNGM)
Details on the UTY-RVNGM wired remote controller.
1-8. Wired remote controller (UTY-RLRG)
Details on the UTY-RLRG wired remote controller.
1-9. Wired remote controller (UTY-RNRGZ*)
Details on the UTY-RNRGZ* wired remote controller.
1-10. Simple remote controller (UTY-RSNGM)
Details on the UTY-RSNGM simple remote controller.
2. Function settings (for outdoor unit)
Function settings specific to the outdoor unit.
2-1. Setting methods
Methods for configuring outdoor unit settings.
2-2. Outdoor unit low noise operation function (option)
Setting the outdoor unit's low noise operation function.
2-3. Changing the current limit function
Adjusting the outdoor unit's current limit function.
3. Check and test
Procedures for checking and testing system operation.
3-1. Check run
Procedure for performing a wiring check run.
3-3. Error code
Information on interpreting error codes and LED indicators.
3-3. Error code
Detailed error code display and interpretation.
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