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General| Brand | Daikin |
|---|---|
| Model | SUPER MULTI NX FTXS12LVJU |
| Category | Air Conditioner |
| Language | English |
Essential safety guidelines and precautions for performing repair work on the air conditioning system.
Important safety advice for users to ensure safe operation and prevent hazards.
Overview of functions available for different Daikin indoor units, categorized by feature.
Technical specifications for CTXS, FTXS, FDXS, and CDXS series indoor units.
Technical specifications for 2MXS, 3MXS, and 4MXS series outdoor units.
Detailed diagrams and pin assignments for indoor unit control, signal receiver, and display PCBs.
Wiring diagrams and connector details for outdoor unit Main PCB, Service Monitor PCB, MID1, and MID2.
Explanation of how the system detects and controls room temperature for optimal comfort.
Details the parameters controlling compressor frequency for capacity adjustment.
Instructions on adjusting airflow direction for upper/lower and right/left louvers.
Description of the 9-step fan speed control and automatic fan speed adjustment.
How program dry operation removes humidity while maintaining room temperature.
Explanation of the automatic cooling/heating function and mode switching points.
How thermostat control is based on the difference between room and target temperatures.
Automatic adjustment of target temperature for comfortable sleeping and energy saving.
Function to reduce maximum power consumption for energy saving.
Records and recalls favorite temperature and airflow settings for personalized comfort.
Motion sensor function for energy saving by detecting human presence.
Maximizes cooling/heating effect by increasing fan speed and compressor frequency.
Details functions like Hot-Start, Signal Receiving, Indoor Unit ON/OFF button, and filters.
Role in controlling discharge pipe temperature, detecting disconnection, and high pressure protection.
Controls discharge pipe temperature; abnormal rise causes frequency reduction or halt.
Used for gas pipe isothermal control during cooling operation.
Controls target discharge pipe temperature, freeze-up, anti-icing, heating peak-cut, and subcooling.
Used for subcooling control in heating and liquid pipes isothermal control.
Defines the priority order of operation modes: normal, forced, and test modes.
Determines compressor frequency based on room capacity, target temperature, and indoor unit commands.
Details preheating operation, four-way valve switching, and 3-minute standby.
Manages compressor frequency based on discharge pipe temperature to prevent overheating.
Sets the frequency upper limit based on detected input current to protect the inverter.
Limits operating frequency to prevent indoor heat exchanger freezing during cooling.
Determines frequency upper limit based on indoor heat exchanger temperature to prevent high pressure.
Manages outdoor fan ON/OFF and speed based on various operating conditions.
Stops the compressor based on outdoor temperature and heat exchanger temperature to prevent damage.
Procedure for defrosting using the cooling cycle, with conditions for starting and canceling.
Controls frequency upper limit to prevent abnormal high pressure when frequency is low.
Details control functions including closing, pressure equalization, opening limits, and feedback.
Covers sensor malfunction detection, overcurrent detection, and refrigerant shortage control.
Guidance on handling and operating the air conditioner after installation and trial operation.
Details operation of CTXS-J, CTXS-H, FTXS-H series units, including remote controller and modes.
Details operation of CTXS-L, FTXS-L series units, including remote controller and functions.
Details operation of FDXS-D series units, including remote controller and functions.
Details operation of CDXS-L, FDXS-L series units, including remote controller and functions.
Interpreting blinking operation lamp patterns to diagnose indoor unit issues.
Diagnosing outdoor unit issues by observing the status of green and red LEDs on the PCB.
Methods for entering diagnosis mode and interpreting error codes via the remote controller.
Methods for entering diagnosis mode and interpreting error codes via the remote controller.
List of error codes displayed on the remote controller for indoor unit malfunctions.
Table of outdoor unit LED indications and corresponding error codes and descriptions.
Diagnosis and troubleshooting steps for indoor unit PCB malfunctions.
Troubleshooting for cooling freeze-up and heating peak-cut control malfunctions.
Diagnosing issues related to DC and AC fan motors and their components.
Troubleshooting for indoor heat exchanger and room temperature thermistor issues.
Diagnosing signal transmission problems between indoor and outdoor units.
Troubleshooting for incorrect voltage detected between indoor and outdoor units.
Methods for detecting refrigerant shortage via power consumption and discharge pipe temperature.
Diagnosing issues related to abnormal power supply voltage to the outdoor unit.
Troubleshooting communication errors between outdoor unit microcomputer and PM1.
Diagnosing connection issues and anti-icing function in other rooms.
Diagnosing indoor unit icing by checking temperatures and troubleshooting steps.
Troubleshooting abnormal running order of the outdoor unit microcomputer program.
Diagnosing compressor overload conditions and potential causes.
Detecting compressor lock by checking running condition and current waveform.
Diagnosing errors related to the DC fan motor's rotation speed and Hall IC.
Detecting overcurrent in the inverter DC section to protect the compressor.
Troubleshooting abnormalities in the four-way valve for 18 class units.
Manages compressor frequency based on discharge pipe temperature to prevent overheating.
Activates control measures when outdoor heat exchanger thermistor temperature exceeds limits.
Troubleshooting for abnormalities in compressor startup voltage, DC voltage, and current.
Detecting compressor start-up failure related to the position detection circuit.
Detects CT or related errors by checking compressor frequency and input current.
Troubleshooting errors detected by checking thermistor input voltage and temperature.
Detects electrical box temperature rise via radiation fin thermistor.
Detects radiation fin temperature rise with compressor on using the radiation fin thermistor.
Detects overcurrent in the inverter DC section to protect the compressor.
Measuring thermistor resistance at different temperatures to check for faults.
Procedure to check the fan motor connector for proper connection and voltage.
Checking Hall IC output voltage and pulse generation for CDXS/FDXS fan motors.
Measuring power supply waveform to check for disturbances or sine wave conformity.
Procedures to check EV connector, continuity, and coil function for faults.
Checking S80 voltage and four-way valve coil continuity for proper operation.
Checking for refrigerant leakage and discharge pipe thermistor disconnection.
Using an inverter checker to diagnose compressor startup or overcurrent issues.
Checking rotation pulse input on the outdoor unit PCB for fan motor function.
Verifying installation parameters like airflow, temperature, and clearances.
Checking discharge pressure, stop valve status, and pipe condition.
Checking if the outdoor unit fan is running and functioning correctly.
Checking for short circuits on the main circuit by measuring resistance.
Measuring capacitor voltage on the main circuit for proper function.
Measuring resistance between power module and compressor terminals.
Step-by-step instructions for removing outer panels, electrical box, PCBs, fan motor, etc.
Instructions for removing outer panels, electrical box, PCBs, fan motor, etc. for larger outdoor units.
Procedure for safely discharging refrigerant when relocating or disposing of the unit.
How to perform forced cooling or heating operations for testing and maintenance.
Using the built-in function to detect and correct wiring errors automatically.
Procedure for verifying all functions and parts after installation.
Configuration settings for outdoor and indoor units after installation.
Procedure for applying silicon grease to PCB components for proper heat dissipation.
Diagrams showing refrigerant flow and piping connections for indoor and outdoor units.
Schematic diagrams illustrating electrical connections for indoor and outdoor units.
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