Hitachi YUTAKI S COMBI RWD-4.0NWE-260S User Manual

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YUTAKI SERIES

Table of Contents

Questions and Answers:

A
annaoconnellSep 8, 2025
What causes Activation of protection device (high pressure cut) on Hitachi YUTAKI S COMBI RWD-4.0NWE-260S Air Conditioner?
- D
  daltonmeganSep 8, 2025
  If your Hitachi Air Conditioner displays 'Activation of protection device (high pressure cut)', inspect the entire system for the mentioned failures. This can be caused by activation of PSH, locked motor, abnormal operation in the power supply phase, failure of fan motor, drain discharge, PCB, relay, float switch activated, pipe clogging, excessive refrigerant, or inner gas mixing, or fan motor locking at cooling operation.
D
David AndersonSep 7, 2025
How to solve Incorrect capacity setting or combined capacity between outdoor and indoor units on Hitachi Air Conditioner?
- H
  Heather LewisSep 7, 2025
  If your Hitachi Air Conditioner displays 'Incorrect capacity setting or combined capacity between outdoor and indoor units', ensure proper capacity settings for both units. This is caused by an incorrect Capacity Code Setting, or Excessive or Insufficient Indoor Unit Total Capacity Code.
T
Tanya AlvarezSep 6, 2025
How to solve RF Communication failure on Hitachi YUTAKI S COMBI RWD-4.0NWE-260S?
- A
  alexis90Sep 6, 2025
  If your Hitachi Air Conditioner shows 'RF Communication failure', check the RF communication setup. This issue occurs when there is no communication for 1 hour with one or two RF receivers which are bound to the RF-Bridge.
R
Robert BarnesSep 5, 2025
What does Decrease in discharge gas superheat mean for Hitachi YUTAKI S COMBI RWD-4.0NWE-260S Air Conditioner?
- A
  Amy WalkerSep 6, 2025
  If your Hitachi Air Conditioner displays 'Decrease in discharge gas superheat', check refrigerant charge and inspect related components. Possible causes are excessive refrigerant charge, failure of thermistor, incorrect wiring, incorrect piping connection, or expansion valve locking at opened position (disconnected connector).
D
Danielle AllenSep 5, 2025
What causes excessively high discharge gas temperature at the top of compressor in Hitachi Air Conditioner?
- F
  Frank HenrySep 5, 2025
  If your Hitachi Air Conditioner shows 'Excessively high discharge gas temperature at the top of compressor', inspect refrigerant levels and expansion valves. This can be caused by insufficient refrigerant charge, refrigerant leakage, or an expansion valve that is closed or clogged.
R
Rachel MooreAug 23, 2025
How to fix Hitachi YUTAKI S COMBI RWD-4.0NWE-260S transmission alarm?
- J
  Julia CarterAug 25, 2025
  If your Hitachi Air Conditioner displays a 'Transmission Alarm (Not outdoor unit detected)', it typically indicates a connection issue. Check the connectors for any looseness or breakage, as the cause may be a loose, disconnected, broken, or short-circuited connector.
S
steven95Sep 3, 2025
What causes Transmission error between Central and indoor communication in Hitachi YUTAKI S COMBI RWD-4.0NWE-260S?
- R
  rhaleSep 3, 2025
  If your Hitachi Air Conditioner displays a 'Transmission error between Central and indoor communication', inspect and repair the indoor fuse and wiring. The issue is often caused by an indoor fuse meltdown or problems with the indoor/central connection wiring (breaking, wiring error, etc.).
B
bowersedwardSep 2, 2025
How to reconfigure LCD settings on Hitachi Air Conditioner?
- S
  Sharon MathisSep 2, 2025
  If your Hitachi Air Conditioner displays 'Incorrect LCD setting', reconfigure the LCD settings. This indicates that the current LCD configuration does not allow proper operation.
M
Mr. Charles JacksonSep 1, 2025
How to troubleshoot Hitachi YUTAKI S COMBI RWD-4.0NWE-260S LCD H-link RCS transmission error?
- D
  David ShawSep 2, 2025
  If your Hitachi Air Conditioner shows 'LCD H-link RCS transmission error', inspect and repair the H-link communication wiring. The cause is no H-link communication for a continuous period of 1 minute between Indoor and LCD User control by connection wiring (breaking, wiring error, etc.)
M
Michelle RyanSep 1, 2025
What causes Hitachi Air Conditioner hydraulic alarm pressure?
- M
  Mario AllenSep 1, 2025
  If your Hitachi Air Conditioner displays 'Hydraulic alarm pressure', check the system for any leaks or blockages affecting water pressure. This alarm indicates that water pressure is not detected in the hydraulic cycle.

Hitachi YUTAKI S COMBI RWD-4.0NWE-260S Specifications

General

Brand	Hitachi
Model	YUTAKI S COMBI RWD-4.0NWE-260S
Category	Air Conditioner
Language	English

Summary

Yutaki Series Overview

Applied Symbols and Safety Guidance

Safety Signal Words

Definitions for DANGER, CAUTION, and NOTE to identify hazard levels.

General Safety and Important Notices

Additional Safety Information

Crucial safety warnings and precautions for installation and operation.

Important Notices for Installation and Use

Critical instructions for proper installation, use, and handling of the heat pump system.

General Data and Capacity Tables

Nominal Capacity-Performance Tables

Electrical Data for Split Systems

Outdoor Unit Electrical Specifications

Refrigerant Cycle and Hydraulic Circuits

Split System Refrigerant Cycles

Electrical and Control Settings

Wiring Size Specifications

Setting DIP Switches and Rotary Switches

Outdoor Unit Switch Locations

Unit Controller Overview

Wizard Start-Up Configuration Process

Configuration Assistant Overview

Troubleshooting and Alarms

Indoor Unit Alarms

List of alarm codes for indoor units, their details, and main causes.

Maintenance Procedures

Outdoor Unit General Maintenance

Step-by-step guide for maintaining the outdoor unit components.

Draining Operations and Filter Maintenance

Draining Procedures for Yutaki S

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Preview: Hitachi YUTAKI Series

Hitachi YUTAKI Series