Daikin 2MXU50GV1B User Manual

Warning
Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the
world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a
particular country. Prior to purchase, please therefore confirm with your local authorised importer,
distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for
use, in the region where the product will be used. This statement does not purport to exclude, restrict
or modify the application of any local legislation.
Ask a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorised parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
Read the User's Manual carefully before using this product. The User's Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install
the outdoor unit close to the sea shore, contact your local distributor.
Cautions on product corrosion
JMI-0107 JQA-1452
Organization:
DAIKIN INDUSTRIES, LTD.
AIR CONDITIONING MANUFACTURING DIVISION
Scope of Registration:
THE DESIGN/DEVELOPMENT AND MANUFACTURE OF
COMMERCIAL AIR CONDITIONING, HEATING, COOLING,
REFRIGERATING EQUIPMENT, COMMERCIAL HEATING
EQUIPMENT, RESIDENTIAL AIR CONDITIONING
EQUIPMENT, HEAT RECLAIM VENTILATION, AIR
CLEANING EQUIPMENT, MARINE TYPE CONTAINER
REFRIGERATION UNITS, COMPRESSORS AND VALVES.
Organization:
DAIKIN INDUSTRIES
(THAILAND) LTD.
Scope of Registration:
THE DESIGN/DEVELOPMENT
AND MANUFACTURE OF AIR
CONDITIONERS AND THE
COMPONENTS INCLUDING
COMPRESSORS USED FOR THEM
All of the Daikin Group’s business
facilities and subsidiaries in Japan
are certified under the ISO 14001
international standard for
environment management.
Dealer
Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com/global_ac/
All rights reserved
c
SiBE12-908
Specifications, designs and other content appearing in this brochure are current as of June 2009 but subject to change without notice.
SiBE12-908
Printed in Japan 06/2009 B AK
SiBE12-908
[Applied Models]
 Inverter Multi : Heat Pump
Service Manual / Inverter Multi System with Humidifying G-Series
Inverter Multi System
with Humidifying
G-Series

Daikin 2MXU50GV1B Specifications

General

Brand	Daikin
Model	2MXU50GV1B
Category	Heat Pump
Language	English

Summary

Introduction

Safety Cautions

Essential safety precautions and warnings to be followed during operation and maintenance.

Used Icons

Explanation of standard icons used throughout the manual for quick reference.

Part 1 List of Functions

List of Functions

Details all functions available for the indoor and outdoor units, categorized by type.

Part 2 Specifications

Product Specifications Overview

General overview of product specifications.

Indoor Unit Specifications

Detailed technical data for various indoor unit models, including airflow and sound levels.

Outdoor Unit Specifications

Detailed technical data for outdoor unit models, including capacity and refrigerant details.

Part 3 Printed Circuit Board Connector Wiring Diagram

PCB Connector Wiring Diagram

Diagrams illustrating connector layouts and functions on printed circuit boards.

Indoor Unit PCB Wiring Details

Specific connector assignments and designations for indoor unit PCBs.

Outdoor Unit PCB Wiring Details

Specific connector assignments and designations for outdoor unit PCBs.

Part 4 Function and Control

Main System Functions Explained

Detailed explanation of core operational functions like frequency control and thermostat operation.

Thermistor Role in Heat Pump Models

Explanation of how thermistors are used for temperature sensing in heat pump models.

System Control Specifications and Logic

Details on operational logic, mode hierarchy, and control parameters.

Part 5 Installation / Operation Manual

Installation Procedures Guide

Step-by-step instructions for installing indoor and outdoor units.

System Configuration Overview

Information on setting up and understanding the system configuration.

User Operation Manual

Instructions on how to operate the air conditioning system and its features.

Part 6 Service Diagnosis

Service Check and Failure Diagnosis

Methods for initial diagnosis using indicator lamps, LEDs, and remote controller.

Troubleshooting Common Issues

Diagnosing and resolving common malfunctions and error codes.

Component Specific Checks

Procedures for checking specific components like fan motors, thermistors, and capacitors.

Part 7 Removal Procedure

Indoor Unit Component Removal

Step-by-step instructions for disassembling and removing indoor unit components.

Outdoor Unit Component Removal

Step-by-step instructions for disassembling and removing outdoor unit components.

Part 9 Appendix

Refrigerant Piping Diagrams

Schematic diagrams illustrating refrigerant piping for indoor and outdoor units.

Electrical Wiring Diagrams

Electrical wiring diagrams for indoor and outdoor units.