Brand: DAIKIN
Category: Air Conditioning
Document Type: Manual
Language: EN
Manual for FTKB09AXVJU
Uploaded: Sept. 12, 2025, 4:15 a.m.
Warranty Information
Refer to the warranty information provided separately.
System Operation Overview
This manual covers Inverter Single Split air conditioning systems. It details product line-ups, wiring diagrams, piping specifications, and dimensions for both indoor and outdoor units.
Key functions include temperature control, cooling/heating modes, dry mode, fan mode, auto mode, sleep mode, quiet function, and powerful function. It also outlines communication protocols, thermistor functions, minimum off-time control, auto restart, and four-way valve control.
Specific controls for outdoor fan, defrost cycle, freeze prevention, pressure protection, and temperature control are explained. Safety cautions for repair work, including electrical shock and refrigerant handling, are emphasized.
Troubleshooting and diagnostic procedures are provided, along with refrigerant diagrams and component checks for electronic expansion valves and four-way valves.
Troubleshooting and error codes
| Section | Topic | Description |
|---|---|---|
| 3.1 | Error Indication from Indoor | Details on how errors are indicated by the indoor unit. |
| 3.2 | Error Code retrieved by handset | List of error codes retrievable via the remote handset. |
| 3.3 | Error code description for Inverter | Explanation of error codes specific to the inverter system. |
| 6.2 | Electronic Expansion Valve (EXV) checking procedures | Step-by-step guide to check the EXV's connection, continuity, and coil functionality. |
| 6.3.1 | Four way valve performance checking procedures (Class 09/12) | Flowchart for checking the four-way valve for 09/12 models, including voltage and resistance checks. |
| 6.3.2 | Four way valve performance checking procedures (Class 18/24) | Flowchart for checking the four-way valve for 18/24 models, including voltage and resistance checks. |
| 6.4 | Inverter unit refrigerant check procedures | Procedure for checking the refrigerant system, including discharge pipe thermistor and leakage. |
| 6.5 | Rotation pulse check on outdoor unit PCB | Steps to check rotation pulse signals and voltages on the outdoor unit PCB. |
| 6.6 | Installation condition check | Flowchart for checking installation conditions like airflow and obstacles. |
| 6.7 | Outdoor fan system check | Procedure to check the outdoor fan's operation and connections. |
| 6.8.1 | Power transistor check for class 09 & class 12 | Resistance measurement procedure for power transistors on the outdoor unit PCB. |
| 6.8.2 | Main circuit short check for class 18 & class 24 | Resistance measurement procedure for the main circuit diode bridge. |
| 6.9 | Power supply waveforms check procedures | Instructions for checking power supply waveforms using an oscilloscope. |