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Daikin FLKS25BAVMB User Manual

Daikin FLKS25BAVMB
232 pages
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SiENBE05-722_A
Service
Manual
Inverter Pair
Floor/Ceiling Suspended Dual Type
BA-Series
[Applied Models]
Inverter Pair: Cooling only
Inverter Pair: Heat Pump

Table of Contents

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Daikin FLKS25BAVMB Specifications

General IconGeneral
Cooling Capacity2.5 kW
Heating Capacity3.2 kW
RefrigerantR32
TypeSplit System
Power Supply220-240V / 50Hz
Noise Level (Indoor Unit)19 dB(A)

Summary

1. Introduction

1.1 Safety Cautions

Be sure to read the following safety cautions before conducting repair work.

1.1.1 Cautions Regarding Safety of Workers

Provides warnings and cautions for workers performing repairs on the equipment.

1.1.2 Cautions Regarding Safety of Users

Provides warnings and cautions for users regarding the safe operation of the equipment.

Part 2 Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

Part 4 Function and Control

1.1 Temperature Control

Explains how the system regulates and maintains the desired room temperature.

1.2 Frequency Principle

Details the inverter principle and how compressor frequency is controlled.

2. Function of Thermistor

3. Control Specification

3.2 Frequency Control

Details how compressor frequency is determined and adjusted based on temperature differences.

Part 6 Service Diagnosis

1. Caution for Diagnosis

Provides essential cautions and warnings before performing diagnostic procedures.

1.1 Troubleshooting with LED

How to troubleshoot errors using the operation lamp and LED indicators.

2. Problem Symptoms and Measures

Lists common symptoms and provides measures for troubleshooting.

3. Troubleshooting

Detailed troubleshooting steps for various system errors.

3.1 Error Codes and Description

Lists error codes displayed on the remote control and their descriptions.

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

Details protection controls to prevent freezing or manage heating peak load.

3.4 Fan Motor (AC Motor) or Related Abnormality

Troubleshooting steps for abnormalities related to the fan motor.

3.5 Thermistor or Related Abnormality (Indoor Unit)

Troubleshooting for thermistor or related abnormalities in the indoor unit.

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

Troubleshooting steps for signal transmission errors between indoor and outdoor units.

3.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit)

Troubleshooting for unspecified voltage issues between indoor and outdoor units.

3.8 Outdoor Unit PCB Abnormality

Troubleshooting steps for abnormalities detected in the outdoor unit's PCB.

3.9 OL Activation (Compressor Overload)

Troubleshooting for OL activation, indicating compressor overload.

3.10 Compressor Lock

Troubleshooting steps for compressor lock conditions.

3.11 DC Fan Lock

Troubleshooting for DC fan lock errors.

3.12 Input Overcurrent Detection

Troubleshooting steps for input overcurrent detection.

3.13 Four Way Valve Abnormality

Troubleshooting for abnormalities detected in the four-way valve.

3.14 Discharge Pipe Temperature Control

Troubleshooting for issues related to discharge pipe temperature control.

3.15 High Pressure Control in Cooling

Troubleshooting for high pressure control issues during cooling operation.

3.16 Compressor System Sensor Abnormality

Troubleshooting for abnormalities in compressor system sensors.

3.17 Position Sensor Abnormality

Troubleshooting for position sensor abnormalities.

3.18 DC Voltage / Current Sensor Abnormality

Troubleshooting for DC voltage or current sensor abnormalities.

3.19 Thermistor or Related Abnormality (Outdoor Unit)

Troubleshooting for thermistor or related abnormalities in the outdoor unit.

3.20 Electrical Box Temperature Rise

Troubleshooting for electrical box temperature rise issues.

3.21 Radiation Fin Temperature Rise

Troubleshooting for radiation fin temperature rise issues.

3.22 Output Overcurrent Detection

Troubleshooting steps for output overcurrent detection.

3.23 Refrigerant Shortage

Troubleshooting procedures for detecting and addressing refrigerant shortage.

3.24 Low-voltage Detection or Over-voltage Detection

Troubleshooting for low-voltage or over-voltage detection errors.

4.1.1 Electronic Expansion Valve Check

Procedure for checking the electronic expansion valve (EV) for proper function.

4.1.2 Four Way Valve Performance Check

Procedure to check the performance and continuity of the four-way valve.

4.1.3 Thermistor Resistance Check

Instructions for checking thermistor resistance values against temperature charts.

4.1.8 Inverter Units Refrigerant System Check

Checks related to the refrigerant system for inverter units.

Part 7 Removal Procedure

Part 8 Trial Operation and Field Settings

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