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Daikin FFQ12Q2VJU Service Manual

Daikin FFQ12Q2VJU
299 pages
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[Applied Models]
Inverter Pair : Heat Pump
Multi-Split Type Air Conditioners
5MXS-T, 4MXL-T Series
Service
Manual
SiUS121827E

Table of Contents

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Questions and Answers:

Daikin FFQ12Q2VJU Specifications

General IconGeneral
BrandDaikin
ModelFFQ12Q2VJU
CategoryAir Conditioner
LanguageEnglish

Summary

Introduction

Safety Cautions

Important warnings and cautions for ensuring safety during repair and maintenance.

Part 2 Specifications

Specifications

Technical specifications for RA Indoor Units, SA Indoor Units, and Outdoor Units.

Part 3 Printed Circuit Board Connector Wiring Diagram

Indoor Unit

Wiring diagrams for various indoor unit models, detailing PCB connector assignments.

Outdoor Unit

Wiring diagram for the Outdoor Unit Main PCB (PCB1) and Service Monitor PCB (PCB2).

Part 4 Functions and Control

Common Functions

RA Indoor Unit Functions

SA Indoor Unit Functions

Control Specification

Technical specifications for thermistor functions, mode hierarchy, and frequency control.

Part 5 Remote Controller

BRC1E73 Wired Remote Controller

BRC082A43 Wireless Remote Controller

BRC082A41W, BRC082A42W(S) Wireless Remote Controller

Part 6 Service Diagnosis

General Problem Symptoms and Check Items

Troubleshooting guide for common symptoms and initial check items.

Troubleshooting with LED

Guide to troubleshooting based on LED indications for indoor and outdoor units.

Service Diagnosis

Code Indication on Remote Controller

Lists error codes indicated on remote controllers for RA, SA, and Outdoor units.

Troubleshooting for RA Indoor Unit

Troubleshooting steps for RA indoor unit abnormalities like PCB, fan motor, and thermistor issues.

Troubleshooting for SA Indoor Unit

Troubleshooting steps for SA indoor unit abnormalities like PCB, fan motor, and sensors.

Troubleshooting for Outdoor Unit

Troubleshooting for outdoor unit issues including refrigerant shortage, voltage, wiring, and PCB faults.

Part 7 Trial Operation and Field Settings

Pump Down Operation

Forced Cooling Operation

Wiring Error Check Function

Procedure for activating and interpreting the wiring error check function.

Trial Operation

Field Settings

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