Daikin FVXS50BVMA Service Manual

Daikin FVXS50BVMA Service Manual

Super multi nx c-series
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Si12 - 411A
C-Series
[Applied Models]
Inverter Multi : Cooling Only
Inverter Multi : Heat Pump

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Summarization of Contents

Part 1 List of Functions
1. List of Functions
Details the functions available for cooling-only models, categorized by system features.
1.1 Cooling Only Models
Details the functions available for cooling-only models, categorized by system features.
1.2 Heat Pump Models
Lists functions specific to heat pump models, covering operational capabilities.
Part 2 Specifications
1. Specifications
Provides detailed technical specifications for various cooling-only indoor units.
1.1 Indoor Units - Cooling Only
Provides detailed technical specifications for various cooling-only indoor units.
1.2 Outdoor Units - Cooling Only
Outlines technical specifications for cooling-only outdoor units, including capacity and dimensions.
1.3 Indoor Units - Heat Pump
Detailed technical specifications for indoor units designed for heat pump operation.
1.4 Outdoor Units - Heat Pump
Technical specifications for outdoor units supporting heat pump functionality.
Part 3 Printed Circuit Board Connector Wiring Diagram
1. Printed Circuit Board Connector Wiring Diagram
Wiring diagram details for wall-mounted indoor units of the 20/25/35 class.
1.1 Wall Mounted Type 20/25/35 Class
Wiring diagram details for wall-mounted indoor units of the 20/25/35 class.
1.2 Wall Mounted Type 50/60/71 Class
Wiring diagram for wall-mounted indoor units of the 50/60/71 class.
1.5 Floor Standing Type
Wiring diagrams specific to floor-standing indoor unit models.
1.6 Outdoor Units
Wiring diagrams for various outdoor units.
Part 4 Function and Control
1. Main Functions
Explains how compressor frequency is controlled for capacity regulation.
1.1 Frequency Principle
Explains how compressor frequency is controlled for capacity regulation.
1.3 Fan Speed Control for Indoor Units
Details how indoor unit fan speed is automatically adjusted based on temperature differences.
1.7 Intelligent Eye
Describes the sensor function that detects human presence for energy saving.
1.8 Home Leave Operation
Explains the function to set preferred temperature and airflow for immediate heating/cooling.
3. Control Specification
Outlines how compressor frequency is determined based on room temperature and capacity.
3.2 Frequency Control
Outlines how compressor frequency is determined based on room temperature and capacity.
3.12 Electronic Expansion Valve Control
Details various controls managed by the electronic expansion valve.
3.15 Wiring-Error Check
Describes the function to automatically correct wiring errors in the system.
Part 5 System Configuration
1. System Configuration
Guidance on operating and handling the air conditioner after installation and testing.
1.1 Operation Instructions
Guidance on operating and handling the air conditioner after installation and testing.
2. Instruction
Essential safety guidelines and warnings for handling the air conditioner.
2.2 Safety Precautions
Essential safety guidelines and warnings for handling the air conditioner.
2.3 Names of Parts
Identifies and labels the key components of the indoor and outdoor units.
2.5 AUTO · DRY · COOL · HEAT · FAN Operation
Instructions on selecting and using different operating modes of the air conditioner.
2.14 Troubleshooting
Lists common problems and their solutions for the air conditioner system.
Part 6 Service Diagnosis
1. Caution for Diagnosis
Guidance on interpreting the operation lamp for troubleshooting basic issues.
1.1 Troubleshooting with the Operation Lamp
Guidance on interpreting the operation lamp for troubleshooting basic issues.
2. Problem Symptoms and Measures
A comprehensive guide to identifying and resolving common operational problems.
5. Troubleshooting
Detailed troubleshooting steps for issues related to indoor units.
5.1 Indoor Units
Detailed troubleshooting steps for issues related to indoor units.
5.2 Outdoor Units
Troubleshooting procedures for problems occurring in the outdoor unit.
5.3 Indoor Unit PCB Abnormality
Steps to diagnose and resolve issues related to the indoor unit's PCB.
5.4 Freeze-up Protection Control or High Pressure Control
Troubleshooting for freeze-up protection or high-pressure control activation.
5.5 Fan Motor or Related Abnormality
Diagnosing and resolving problems with the fan motor or its related components.
5.6 Thermistor or Related Abnormality (Indoor Unit)
Troubleshooting for abnormalities with indoor unit thermistors.
5.18 CT or Related Abnormality
Diagnosing issues related to the Current Transformer (CT) or its associated components.
5.23 Insufficient Gas
Troubleshooting steps for identifying and resolving refrigerant gas shortages.
6. Check
Procedures for checking fan motor connector output and related voltages.
6.1.1 Fan Motor Connector Output Check
Procedures for checking fan motor connector output and related voltages.
6.1.3 Electronic Expansion Valve Check
Steps for checking the performance and functionality of the electronic expansion valve.
6.1.5 Thermistor Resistance Check
Guidance on measuring thermistor resistance to diagnose faults.
Part 7 Removal Procedure
1. Outdoor Unit (80 / 90 Class)
Step-by-step instructions for removing the outer panels of the 80/90 class outdoor unit.
1.1 Removal of Outer Panels
Step-by-step instructions for removing the outer panels of the 80/90 class outdoor unit.
1.3 Removal of Electrical Box
Procedure for safely removing the electrical box from the outdoor unit.
1.4 Removal of PCB
Detailed steps for removing the Printed Circuit Board (PCB).
1.5 Removal of Fan Motor
Instructions for removing the outdoor unit fan motor.
1.10 Removal of Compressor
Procedure for safely removing the compressor from the outdoor unit.
2. Outdoor Unit (50 / 52 / 58 / 68 / 75 Class)
Steps for removing the outer panels of the 50-75 class outdoor unit.
2.1 Removal of Outer Panels
Steps for removing the outer panels of the 50-75 class outdoor unit.
2.3 Removal of PCB
Instructions for removing the PCB from the 50-75 class outdoor unit.
2.4 Removal of Fan Motor
Procedure for removing the fan motor from the 50-75 class outdoor unit.
2.6 Removal of Four Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil and Thermistor
Detailed steps for removing coils and thermistors from the outdoor unit.
2.9 Removal of Compressor
Instructions for removing the compressor from the 50-75 class outdoor unit.
Part 8 Others
1.1 Test Run from the Remote Controller
Guidance on performing a test run of the air conditioner using the remote controller.
1.2 Jumper Settings
Information on configuring jumper settings for specific operational modes or configurations.
Part 9 Appendix
1. Piping Diagrams
Diagrams illustrating the refrigerant piping for various indoor unit models.
1.1 Indoor Units
Diagrams illustrating the refrigerant piping for various indoor unit models.
1.2 Outdoor Units
Piping diagrams showing the refrigerant flow for different outdoor unit models.
2. Wiring Diagrams
Electrical wiring diagrams for various indoor unit models.
2.1 Indoor Units
Electrical wiring diagrams for various indoor unit models.
2.2 Outdoor Units
Electrical wiring diagrams for various outdoor unit models.

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