Fujitsu AOYG18KBTB User Manual

AIR CONDITIONER
Ceiling type
SERVICE MANUAL
INDOOR
ABYG18KRTA
ABYG22KRTA
ABYG24KRTA
ABYG30KRTA
ABYG36KRTA
ABYG45KRTA
OUTDOOR
AOYG18KBTB
AOYG22KBTB
AOYG24KBTB AOYG30KBTB
AOYG36KBTB
AOYG45KBTB
SR_AB004EF_06
2020.12.09

Fujitsu AOYG18KBTB Specifications

General

Brand	Fujitsu
Model	AOYG18KBTB
Category	Air Conditioner
Language	English

Summary

GENERAL INFORMATION

Specifications

Detailed technical specifications for indoor and outdoor units.

Dimensions

Physical dimensions and installation space requirements for indoor and outdoor units.

Specifications

1-1. Indoor unit

Technical specifications for the indoor units.

1-2. Outdoor unit

Technical specifications for the outdoor units.

Dimensions

2-1. Indoor unit

Dimensional drawings and installation space for indoor units.

2-2. Outdoor unit

Dimensional drawings and installation space for outdoor units.

TECHNICAL DATA AND PARTS LIST

1. Precautions

Safety precautions and general advice before servicing or installation.

2. Indoor unit parts list

Detailed parts list and diagrams for indoor unit components.

3. Outdoor unit parts list

Detailed parts list and diagrams for outdoor unit components.

4. Accessories

List of accessories included with the indoor and outdoor units.

5. Optional parts

Optional parts available for the indoor unit, such as remote controllers.

6. Refrigerant system diagrams

Refrigerant circuit diagrams for various models.

7. Wiring diagrams

Wiring diagrams for indoor and outdoor units.

8. PC board diagrams

PC board diagrams for indoor and outdoor unit control systems.

TROUBLESHOOTING

1-1. Error code table (Wired remote controller)

Table mapping error codes to wired remote controller display.

1-2. Error code table (Outdoor unit: for 36 model only)

Table mapping error codes to outdoor unit LED indicators.

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

Troubleshooting steps for serial communication error E:11 (Outdoor unit).

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

Troubleshooting steps for serial communication error E:11 (Indoor unit).

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

Troubleshooting steps for remote controller communication error E:12.

2-4. E: 15. Automatic air flow adjustment error (Indoor unit)

Troubleshooting steps for airflow adjustment error E:15.

2-5. E: 22. Indoor unit capacity error (Indoor unit)

Troubleshooting steps for indoor unit capacity error E:22.

2-6. E: 23. Combination error (Outdoor unit)

Troubleshooting steps for combination error E:23.

2-7. E: 32. Indoor unit main PCB error (Indoor unit)

Troubleshooting steps for indoor unit main PCB error E:32.

2-8. E: 33. Indoor unit motor electricity consumption detection error (Indoor unit)

Troubleshooting steps for motor consumption error E:33.

2-9. E: 35. MANUAL AUTO button error (Indoor unit)

Troubleshooting steps for MANUAL AUTO button error E:35.

2-10. E: 39. Indoor unit power supply error for fan motor (Indoor unit)

Troubleshooting steps for fan motor power supply error E:39.

2-11. E: 41. Room temperature sensor error (Indoor unit)

Troubleshooting steps for room temperature sensor error E:41.

2-12. E: 42. Indoor unit heat exchanger sensor error (Indoor unit)

Troubleshooting steps for heat exchanger sensor error E:42.

2-13. E: 51. Indoor unit fan motor error (Indoor unit)

Troubleshooting steps for indoor fan motor error E:51.

2-14. E: 53. Drain pump error (Indoor unit)

Troubleshooting steps for drain pump error E:53.

2-15. E: 57. Damper (Open/Close) detection limit switch error

Troubleshooting steps for damper limit switch error E:57.

2-16. E: 58. Intake grille error (Indoor unit)

Troubleshooting steps for intake grille error E:58.

2-17. E: 62. Outdoor unit main PCB error (Outdoor unit)

Troubleshooting steps for outdoor main PCB error E:62.

2-18. E: 63. Inverter error (Outdoor unit)

Troubleshooting steps for inverter error E:63.

2-19. E: 64. PFC circuit error (Outdoor unit)

Troubleshooting steps for PFC circuit error E:64.

2-20. E: 65. Trip terminal L error (Outdoor unit)

Troubleshooting steps for trip terminal L error E:65.

2-21. E: 71. Discharge thermistor error (Outdoor unit)

Troubleshooting steps for discharge thermistor error E:71.

2-22. E: 73. Heat exchanger (Middle/Outlet) temperature thermistor error (Outdoor unit)

Troubleshooting steps for heat exchanger sensor error E:73.

2-23. E: 74. Outdoor temperature thermistor error (Outdoor unit)

Troubleshooting steps for outdoor temperature sensor error E:74.

2-24. E: 84. Current sensor error (Outdoor unit)

Troubleshooting steps for current sensor error E:84.

2-25. E: 86. High pressure switch error (Outdoor unit)

Troubleshooting steps for high pressure switch error E:86.

2-26. E: 94. Trip detection (Outdoor unit)

Troubleshooting steps for trip detection error E:94.

2-27. E: 95. Compressor motor control error (Outdoor unit)

Troubleshooting steps for compressor motor control error E:95.

2-28. E: 97. Outdoor unit fan motor error (Outdoor unit)

Troubleshooting steps for outdoor fan motor error E:97.

2-29. E: 99. 4-way valve error (Outdoor unit)

Troubleshooting steps for 4-way valve error E:99.

2-30. E: A1. Discharge temperature error (Outdoor unit)

Troubleshooting steps for discharge temperature error E:A1.

2-31. E: A5. Low pressure error (Outdoor unit)

Troubleshooting steps for low pressure error E:A5.

3-1. Indoor unit—No power

Troubleshooting steps for indoor unit no power issue.

3-2. Outdoor unit—No power

Troubleshooting steps for outdoor unit no power issue.

3-3. No operation (Power is on)

Troubleshooting steps for unit not operating when power is on.

3-4. No cooling/No heating

Troubleshooting steps for no cooling or no heating issues.

3-5. Abnormal noise

Troubleshooting steps for identifying and resolving abnormal noises.

3-6. Water leaking

Troubleshooting steps for water leaking issues.

CONTROL AND FUNCTIONS

1. Compressor frequency control

Explanation of compressor frequency control in different operating modes.

2. Auto changeover operation

How the unit automatically switches between cooling, heating, and dry modes.

1-1. Cooling operation

Compressor frequency control details for cooling operation.

1-2. Heating operation

Compressor frequency control details for heating operation.

1-3. Dry operation

Compressor frequency control details for dry operation.

1-4. Compressor frequency at normal start-up

Compressor frequency control during normal start-up sequence.

1-5. Compressor frequency limitation by outdoor temperature

Compressor frequency limits based on outdoor temperature zones.

2. Auto changeover operation

How the unit automatically switches between cooling, heating, and dry modes.

3-1. Indoor fan control

Indoor fan speed and airflow control settings.

3-2. Outdoor fan control

Outdoor fan speed control based on temperature and frequency.

4-1. Vertical airflow direction louver control

Control of vertical airflow direction louvers.

5-1. Wireless remote control

Timer functions available with the wireless remote control.

5-2. Wired remote control

Timer functions available with the wired remote control.

6-1. Defrost operation in heating operation stopped

Defrost operation logic when heating is stopped.

7-1. Auto restart

Automatic restart function after power interruption.

7-5. Fresh air control

Control of the fresh air intake fan.

7-7. External electrical heater control

Control logic for the external electrical heater.

7-9. Drain pump control

Control logic for the drain pump in cooling operation.

7-10. Prevention to restart for 3 minutes (3 minutes st)

Logic for preventing compressor restart for 3 minutes after failure.

7-13. Peak cut operation(for 30/36/45 model)

Peak cut operation settings to limit power consumption.

8-1. Discharge gas temperature over-rise prevention control

Protection control for high discharge gas temperature.

8-3. Current release control

Control logic to release compressor frequency based on current limits.

8-4. Indoor unit fan motor over temperature protection

Protection control for indoor unit fan motor over-temperature.

8-5. Compressor temperature protection

Protection control for compressor temperature.

8-8. High temperature and high pressure release control

Release control for high temperature and high pressure conditions.

FILED WORKING

1. Function settings (For indoor unit)

Settings for various functions of the indoor unit.

1-1. Function settings by using remote controller

Function settings configurable via the remote controller.

1-2. Function settings on outdoor unit

Function settings configurable locally on the outdoor unit.