Daikin FTXN-LV User Manual

TS13-01
Inverter Split
Wall mounted Type L-Series
Heat pump:
Indoor unit: FTXN-LV
Outdoor unit: RXN-LV
Troubleshooting
Manual

Daikin FTXN-LV Specifications

General

Brand	Daikin
Model	FTXN-LV
Category	Air Conditioner
Language	English

Summary

1.0 Introduction

1.1 INVERTER Y SINGLE SPLIT

Residential (FTXN-LV & RXN-LV): Features and benefits of the inverter system.

Piping Length and Elevation

Table detailing piping specifications for different models.

Outdoor Terminal Block

Image and description of the outdoor unit's terminal block.

Disable Auto Random Restart Function

Default Settings

Describes the default settings after disabling auto restart.

2.0 Algorithm and Control

Indoor Basic Functions

Overview of indoor unit operating modes.

Cool Mode Operation

Details the operational logic for the cooling mode.

Compressor Capacity Graph

Graph illustrating compressor capacity during cooling.

Heat Mode Operation

Details the operational logic for the heating mode.

Fan Mode Operation

Describes the operation of the fan mode.

Auto Mode Operation

Explains the mode switching logic for auto mode.

ID-OD Communication

Communication Disruption Consequences

Describes the consequence of data communication disruption.

Thermistors in RXN-LV

Thermistor Functions

Minimum Run Control

Auto Restart Function

4-Way Valve Control

Defrost Cycle Details

Defrost Control Conditions

Outdoor Fan Control Factors

Indoor Coil Freeze Prevention

Rotation Regulating Functions

Starting Rotation Control

Command Rotation Determination

Fuzzy Control Logic

Limit Rotation Definition

Compressor Rotation Control Zones

High Pressure Protection

Discharge Pipe Temperature Control

Overall Current Control

Oil Recovery Control

Oil Recovery Control Entering Condition

3.0 Service Diagnosis

Diagnosis from Indoor Units

Procedures for diagnosing issues from the indoor unit.

Retrieve Error Codes via Remote Controller

Retrieve Last State Error

Wired Handset BRC51A61 Usage

Y-Series Inverter Error Code Description

Error Code A1: Indoor PCB Abnormality

Error Code A3: Water Pump Error

Error Code A5: Anti-freeze or High Pressure

Error Code A6: Fan Motor Abnormality

Error Code C4: Indoor Coil Thermistor

Error Code C9: Indoor Room Thermistor

Error Code E1: Outdoor PCB Error

Error Code E3: High Pressure Protection

Error Code E4: Low Pressure Protection

Error Code E5: Compressor Overload

Error Code E6: Compressor Lock

Error Code E7: DC Fan Lock

Error Code E8: Input Over Current

Error Code E9: EXV Error

Error Code EA: 4-Way Valve Error

Error Code F3: Discharge Pipe Overheat

Error Code F6: Heat Exchanger Overheat

Error Code H0: Compressor Sensor Error

Error Code H6: Compressor Feedback Error

Error Code H8: AC Current Sensor Error

Error Codes H9/J/P4: Thermistor Abnormalities

Error Code L3: Outdoor Box Overheat

Error Code L4: Heat Sink Overheat

Error Code L5: IPM/IGBT Error

Error Code U0: Insufficient Gas

Error Code U2: DC Voltage Out of Range

Error Code U4: Communication Error (Indoor/Outdoor)

Error Code UA: Communication Error (PCB)

4.0 Wiring Connection

Wiring: FTXN 25/35 LV1B & RXN 25/35 LV1B

Wiring diagram for FTXN 25/35 LV1B and RXN 25/35 LV1B.

Wiring Diagram Notation

Key to symbols used in the wiring diagrams.

Wiring: FTXN 50/60 LV1B & RXN50/60 LV1B

Refrigerant Diagram

Refrigerant Flow: FTXN 25/35 & RXN 25/35

Refrigerant flow diagram for specific models.

Refrigerant Flow: FTXN 50/60 & RXN50/60

Refrigerant flow diagram for specific models.

Appendix: Resistance Values

Resistance at 25°C

Table showing resistance values at 25°C for thermistors.

Table 1: 10K Ohm Thermistor Resistance

Detailed resistance values for 10K ohm thermistors across temperatures.

Table 2: 20K Ohm Thermistor Resistance