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Daikin FCQG125FVEB User Manual

Daikin FCQG125FVEB
215 pages
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Service Manual
GQI-Eco Series
Heat Pump R-410A 50Hz
Smart RZQG71~140L9V1
RZQG71~125L9Y1 / RZQG140LY1
Classic RZQSG71L3V1 / RZQSG100~140L9V1
RZQSG100~125L8Y1 / RZQSG140LY1
ESIE15-13B

Table of Contents

Other manuals for Daikin FCQG125FVEB

Questions and Answers:

Daikin FCQG125FVEB Specifications

General IconGeneral
TypeCeiling Cassette
Cooling Capacity12.5 kW
Heating Capacity14.0 kW
SeriesSkyAir
Power Supply50Hz
RefrigerantR410A

Summary

1. Introduction

1.1 Version log

Records changes and updates made to the service manual over time.

1.2 Safety Cautions

Crucial safety warnings and precautions for repair and user operations.

1.3 Used Icons

1.4 Preface

Part 1 General Information

1. Model Names of Indoor / Outdoor Units

Lists all available indoor and outdoor unit model names and their configurations.

2. Outlook Outdoor Units

Visual overview of the different outdoor unit models available for the series.

3. Operating range

Defines the operational temperature and humidity limits for cooling and heating modes.

Part 2 Remote Controller

1. Wired Remote Controller

Information on wired remote controllers, including applicable models and their functions.

2. Wireless Remote Controller

Information on wireless remote controllers, including applicable models and their functions.

3. Service Mode

Procedures for accessing and using the service mode on the remote controllers for diagnostics.

4. Inspection Mode

Procedures for using the inspection mode on the remote controllers for system checks.

1.2.1 Cautions Regarding Safety of Workers

1.2.2 Cautions Regarding Safety of Users

1.2 Safety Cautions

1.2.1 Cautions Regarding Safety of Workers

Specific safety guidelines for personnel involved in repair and maintenance procedures.

1.2.2 Cautions Regarding Safety of Users

Safety precautions for end-users to ensure safe operation and prevent hazards.

1.1 Version log

1. Model Names of Indoor / Outdoor Units

2. Outlook Outdoor Units

3. Operating range

1.1 Applicable Models

1.2 Names and Functions

1.3 MAIN/SUB Setting when Using 2 Remote Controllers

1.4 Centralized Control Group No. Setting

2.1 Applicable Models

2.2 Names and Functions

2.3 MAIN/SUB Setting

3.1 BRC1D528

3.2 BRC1E52/53

4.1 BRC1D528

4.2 BRC1E52/53

Part 3 Function and Control

1. Function of Main Components and Thermistors

Describes the purpose and location of key components and thermistors in the system.

2. Operation Flow Chart

Visual representation of the system's operational logic during cooling, heating, and emergency modes.

3. Function Details

In-depth explanation of specific operational functions like thermostat control and fan speed settings.

2.1 Cooling / Dry Operation

2.2 Heating Operation

3.1 Indoor Unit

3.2 Outdoor Unit

Part 4 Field Setting

1. Test Operation

Procedures for conducting operational tests after installation to ensure proper function.

2. Field Setting from Remote Controller

Instructions for adjusting system settings using the wired and wireless remote controllers.

3. Field Setting from Outdoor Unit PCB

Details on adjusting settings directly on the outdoor unit's PCB using DIP switches and buttons.

4. Emergency Operation

Methods for operating the unit in emergency situations or when the remote controller is unavailable.

1.1 Pre-run Checks

1.2 Remote Controller Confirmation

2.1 Wired Remote Controller

2.2 Wireless Remote Controller

2.3 Settings Contents and Code No. for Indoor Units

2.4 Overview of the Field Setting on the Outdoor Units

2.5 Quiet (Low Noise) Operation

2.6 I-Demand Function

2.7 Setting for Low Humidity Application

3.1 Location of DIP Switch and BS Button

4.1 Forced Operation

Part 5 Service Diagnosis

1. Maintenance Inspection

Procedures and guidelines for performing regular maintenance checks on the unit.

2. Symptom-based Troubleshooting

A guide to diagnosing problems based on observed symptoms and their likely causes.

3. Troubleshooting by LED Indications

Diagnosing issues by interpreting the status of LEDs on the indoor and outdoor unit PCBs.

4. Troubleshooting by Remote Controller

Procedures for diagnosing faults and errors using the remote controller's self-diagnosis function.

2.1 Overview

2.2 Equipment does not Operate

3.1 Troubleshooting by LED on the Indoor Unit

3.2 Troubleshooting by LED on Outdoor Unit PCB

4.1 Procedure of Self-diagnosis by Remote Controller

4.10 Humidity Sensor System Abnormality

4.11 Malfunction of Motion Sensor / Floor Temperature Sensor

4.20 High Pressure Switch System Abnormality

4.21 Low Pressure Switch System Abnormality

4.22 Thermistor System Abnormality

4.23 Outdoor Unit PCB Abnormality

4.24 Radiation Fin Temperature Rise

4.25 Output Overcurrent Detection

4.26 Electronic Thermal (Time Lag)

4.27 Stall Prevention (Time Lag)

4.28 Transmission System Abnormality (between Control and Inverter PCB)

4.29 Open Phase or Power Supply Voltage Imbalance

4.30 Defective Capacity Setting

4.31 Refrigerant Shortage (Alert)

4.32 Refrigerant Shortage (Error)

4.33 Power Supply Voltage Abnormality

4.34 Transmission Error between Indoor and Outdoor Unit

4.35 Transmission Error Between Remote Controller and Indoor Unit

4.36 Transmission Error between MAIN Remote Controller and SUB Remote Controller

4.37 Field Setting Switch Abnormality

4.38 “UC” Address Duplication of Centralized Controller

4.39 Transmission Error Between Centralized Controller and Indoor Unit

4.40 Transmission Error between Indoor and Outdoor Unit / Piping and Wiring Mismatch / Refrigerant Shortage

4.41 Check

CHECK 1 Check the Thermistors

Detailed steps for checking thermistor resistance and comparing values against specifications.

CHECK 2 Evaluation of Abnormal High Pressure

CHECK 3 Evaluation of Abnormal Low Pressure

CHECK 4 Check for Power Transistor

CHECK 5 Fan Motor Signal Line

CHECK 6 Electronic expansion valve connector and coil resistance criteria

CHECK 7 Check for Factors Causing Wet Operation

CHECK 8 Check for Excessive Refrigerant Charging

CHECK 9 Clogged Points

CHECK 10 Check for Inadequate Refrigerant

3. Thermodynamic characteristic of R-410A

4. Removing the switchbox

Part 6 Appendix

1. Piping Diagrams

Schematic diagrams illustrating the refrigerant piping layout of the system.

2. Wiring Diagrams

Electrical wiring diagrams for the outdoor unit components.

3. Thermodynamic characteristic of R-410A

Data table showing the thermodynamic properties of R-410A refrigerant.

4. Removing the switchbox

Step-by-step instructions on how to safely remove and reinstall the switchbox.

1.1 RZQG-L9V1

2.1 Outdoor Unit

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