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Daikin Super Multi NX FTXG25JV1BS User Manual

Daikin Super Multi NX FTXG25JV1BS
501 pages
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Service
Manual
SiBE121021_C
E-Series / F-Series / G-Series
[Applied Models]
Inverter Multi : Cooling Only
Inverter Multi : Heat Pump

Table of Contents

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Daikin Super Multi NX FTXG25JV1BS Specifications

General IconGeneral
BrandDaikin
ModelSuper Multi NX FTXG25JV1BS
CategoryAir Conditioner
LanguageEnglish

Summary

Part 2 Specifications

1.1 Cooling Only - Indoor Unit

Provides detailed specifications for cooling-only indoor units, including model, airflow, and dimensions.

1.2 Cooling Only - Outdoor Unit

Provides detailed specifications for cooling-only outdoor units, including model, refrigerant, and dimensions.

1.3 Heat Pump - Indoor Unit

Provides detailed specifications for heat pump indoor units, including model, airflow, and dimensions.

1.4 Heat Pump - Outdoor Unit

Provides detailed specifications for heat pump outdoor units, including model, refrigerant, and dimensions.

Part 3 Printed Circuit Board Connector Wiring Diagram

Part 4 Function and Control

1.1 Temperature Control

Explains temperature control based on room and set temperatures, and thermistor readings.

1.2 Frequency Principle

Explains compressor frequency control based on load and temperature difference, and inverter principles.

1.10 ECONO Operation

Describes ECONO operation for limiting maximum power consumption, useful for energy saving.

1.11 HOME LEAVE Operation

Explains the HOME LEAVE function to record and recall preferred settings for convenience.

1.12 2-Area INTELLIGENT EYE Operation

Details the INTELLIGENT EYE function for detecting human presence and saving energy.

1.13 INTELLIGENT EYE Operation

Explains the INTELLIGENT EYE function for detecting human presence and reducing capacity for energy saving.

1.14 Inverter POWERFUL Operation

Describes POWERFUL operation to maximize cooling/heating capacity by increasing fan speed and compressor frequency.

2.1 Drain Pump Control

Details drain pump control logic based on float switch status and cooling thermostat conditions.

2.3 Freeze Prevention Control

Describes freeze prevention control based on indoor heat exchanger temperature and conditions for starting/canceling.

2.4 Hot Start Control (In Heating Operation Only)

Details hot start control to prevent cold air blast during heating and ensure startup capacity.

4.2 Frequency Control

Explains how frequency is determined based on temperature difference, capacity, and control parameters.

4.4 Discharge Pipe Temperature Control

Details how discharge pipe temperature is used for compressor protection and detecting abnormalities.

4.6 Freeze-up Protection Control

Describes how signals from the indoor unit limit operating frequency to prevent freezing.

4.7 Heating Peak-cut Control

Explains how indoor heat exchanger temperature limits frequency to prevent abnormal high pressure during heating.

4.12 Electronic Expansion Valve Control

Covers various aspects of electronic expansion valve control, including closing, pressure equalization, and opening.

4.13 Malfunctions

Details various malfunction detection methods, including sensor and current transformer issues.

Part 6 Service Diagnosis

1. Troubleshooting with LED

Provides troubleshooting steps for indoor and outdoor unit errors indicated by LED blinking.

2. Problem Symptoms and Measures

Lists common problem symptoms and their corresponding measures for troubleshooting.

4. Code Indication on Remote Controller

Lists error codes displayed on the remote controller for RA, SA indoor units, and outdoor units.

4.3 Outdoor Unit

Details error codes indicated by outdoor unit LED lights and their corresponding descriptions.

5. Troubleshooting for RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series

Provides troubleshooting steps for RA indoor unit issues like PCB abnormality and thermistor errors.

5.1 Indoor Unit PCB Abnormality

Provides troubleshooting steps for indoor unit PCB abnormalities and supposed causes.

5.2 Freeze-up Protection Control or Heating Peak-cut Control

Details troubleshooting for freeze-up protection and heating peak-cut control issues.

5.3 Fan Motor or Related Abnormality

Outlines troubleshooting steps for fan motor and related abnormalities.

5.4 Thermistor or Related Abnormality (Indoor Unit)

Guides on checking thermistors and related components for indoor unit abnormalities.

5.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit)

Provides troubleshooting steps for signal transmission errors between indoor and outdoor units.

6. Troubleshooting for SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series

Provides troubleshooting steps for SA indoor unit issues like PCB, drain, fan, and thermistor abnormalities.

6.1 Indoor Unit PCB Abnormality

Provides troubleshooting steps for indoor unit PCB abnormalities and supposed causes.

6.2 Drain Water Level System Abnormality

Guides on troubleshooting drain water level system abnormalities and their causes.

6.3 Fan Motor or Related Abnormality

Outlines troubleshooting steps for fan motor and related abnormalities in SA indoor units.

6.5 Drain System Abnormality

Guides on troubleshooting drain system abnormalities and their supposed causes.

6.6 Thermistor or Related Abnormality

Provides steps for checking thermistors and related components for abnormalities.

6.8 Signal Transmission Error (between Indoor Unit and Remote Controller)

Guides on troubleshooting signal transmission errors between indoor units and remote controllers.

7. Troubleshooting for Outdoor Unit

Provides troubleshooting steps for outdoor unit issues like anti-icing, PCB, compressor, and fan abnormalities.

7.1 Anti-icing Function

Describes troubleshooting for the anti-icing function and detected conditions.

7.2 Outdoor Unit PCB Abnormality

Provides troubleshooting steps for outdoor unit PCB abnormalities, including supposed causes.

7.3 OL Activation (Compressor Overload)

Details troubleshooting for OL activation or compressor overload conditions.

7.4 Compressor Lock

Outlines troubleshooting steps for compressor lock conditions.

Part 7 Removal Procedure

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