Floating Air - Multi-Zone R-454B Service Manual - Ductless & Ducted - 230-Volt

Oct 22, 2026

Upload by sagouaw

Service manual for the Floating Air Multi-Zone refrigerant R-454B system, covering ductless and ducted configurations for 230-volt models. Provides important safety information for qualified technicians, including personal injury and electrical shock hazards, and stresses proper installation, repair, and maintenance responsibilities. Includes specifications such as unit configurations, room size restrictions, indoor and outdoor clearances, dimensions, sound data, and capacity/selection and correction factors. Further details installation, operation ranges, remote control, unit functions, field settings, maintenance, troubleshooting, component testing, refrigerant system repair, sealed system procedures, and wiring diagrams.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages251

Reading Time10 h 33 min

AccessFree to download

Introduction

Important Safety Information

Specification

Non-Ducted Configurations (18-27k BTU, 36-42k BTU)

Wall Mounted Units (7-12k, 18-24k BTU)

Allowable Configurations and Room Size Restriction

Indoor/Outdoor Clearances and Dimensions

Sound Pressure Data

Capacity and Selection Data

Installation

General

Cassette

Ducted

Wall Mount

Outdoor Unit

Operation

Operation Range (Cooling and Heating)

Remote Control

Unit Function

Field Settings

Maintenance

Troubleshooting

Outdoor Unit Basic Troubleshooting

Diagnostic Codes

Indoor Unit-Wall Mount Errors

Components Testing

Cassette-Ducted

Main PCB Terminal ID and Fan Motor

Reversing Valve Checks

Outdoor Unit Main PCB ID

R-454B Sealed System Repair

Refrigerant Cycle Procedures

Wiring Diagrams

Indoor Unit, Wall Mount, Ducted, Cassette, Outdoor Unit

1 Service Manual Ductless Floating Air ® Multi-Zone R-454B Refrigerant Outdoor Unit Wall Mounted Unit Cassette Ducted 230-Volt: FPHMR18A3D, FPHMR27A3D, FPHMR36A3D, FPHMR42A3D 230-Volt: FAHMW07A3D, FAHFW09A3D, FAHFW12A3D, FAHFW18A3D, FAHFW24A3D 230-Volt: FPHFC09A3D, FPHFC12A3D, FPHFC24A3D, FPHFC24A3D 230-Volt: FPHFD09A3D, FPHFD12A3D, FPHFD24A3D, FPHFD24A3D 966011405_01 TABLE OF CONTENTS INTRODUCTION 4 Important Safety Information 4 Personal Injury Or Death Hazards 5 SPECIFICATION 8 18-27k BTU (Outdoor Units) (Non-Ducted Configuration) 8 36-42k BTU (Outdoor Units) (Non-Ducted Configuration) 10 7-12K Wall Mounted Units 12 18-24k BTU Wall Mounted Units 13 Allowable Configurations 18k-36k 18 Allowable Configurations 42k 19 Room Size Restriction 20 Indoor Unit Clearances 21 Outdoor Unit Clearances 21 Dimensions Indoor Unit 22 FAHFW09A3D, FAHFW12A3D 22 FAHFW18A3D, FAHFW24A3D 23 Dimensions Outdoor Unit 24 FPHMR18A3D 24 FPHMR27A3D, FPHMR36A3D, FPHMR42A3D 25 Dimensions Cassette (9 and 12k BTU) 26 Dimensions Cassette (18 and 24k BTU) 27 Dimensions Ducted (9 and 12k BTU) 28 Dimensions Ducted (18 and 24k BTU) 29 Sound Pressure Data-Outdoor Units 30 Capacities and Selection Data (Capacity Characteristics Charts) 31 Capacities and Selection Data (Capacity Characteristics Charts) 18K (Cooling Up to 2 indoor units series) 32 Capacities and Selection Data (Capacity Characteristics Charts) 18K( Heating up to 2 indoor units series) 44 Capacities and Selection Data (Capacity Characteristics Charts) 27K(Cooling up to 3 indoor units series) 48 Capacities and Selection Data (Capacity Characteristics Charts) 27K (Heating up to 3 indoor units series) 60 Capacities and Selection Data (Capacity Characteristics Charts) 27K (Heating up to 3 indoor units series) 62 Capacities and Selection Data (Capacity Characteristics Charts) 27K (Heating up to 3 indoor units series) 63 Capacities and Selection Data (Capacity Characteristics Charts) 36K(Cooling up to 4 indoor units series) 64 Capacities and Selection Data (Capacity Characteristics Charts) 36K (Heating up to 4 indoor units series) 76 Capacities and Selection Data (Capacity Characteristics Charts) 42K (Cooling up to 5 indoor units series) 80 Capacities and Selection Data (Capacity Characteristics Charts) 42K (Heating up to 5 indoor units series) 92 Capacities and Selection Data (Piping Length Correction Factor) 96 Capacities and Selection Data (Correction Factors According To Defrosting Operation) 98 INSTALLATION 99 General 99 Cassette 106 Ducted 123 Wall Mount 137 Outdoor Unit 149 OPERATION 163 Operation Range (Cooling and Heating) 163 Remote Control 164 Unit Function 174 Field Settings 182 MAINTENANCE 187 TROUBLESHOOTING 190 Outdoor Unit 190 Basic Troubleshooting 190 Diagnostic Codes _ Intro 191 Diagnostic Codes _Main PCB 193 Diagnostic Codes _Driver Faults (18k) 197 Diagnostic Codes _Driver Faults (27k, 36k, 42k) 199 Indoor Unit-Wall Mount 202 Diagnostic Codes 202 Unit Does Not Run 203 Error Code 39-DC Fan 204 Error Code 36 205 Error Code 36 206 Blank Display/ Indoor Micro Switch 207 Blank Display/Indoor Unit Door Micro Switch 208 Indoor Unit Cassette and Ducted 209 Diagnostic Codes 209 TABLE OF CONTENTS COMPONENTS TESTING 212 Outdoor Unit 212 Cassette-Ducted 216 Indoor Unit Main PCB Terminal ID (No A2L Sensor Connection) 218 Indoor Fan Motor 219 Reversing Valve 220 Checking the Reversing Valve 220 Checking The Reversing Valve Solenoid 220 Outdoor Unit-Main PCB ID 221 FPHMR18A3D 221 FPHMR27A3D 222 FPHMR36A3D, FPHMR42A3D 223 R-454B SEALED SYSTEM REPAIR 224 Refrigerant Cycle 18k 224 Refrigerant Cycle 27k 225 Refrigerant Cycle 36k 226 R-454B SEALED SYSTEM REPAIR 227 Refrigerant Cycle 42k 227 General Information 228 Required Equipment 230 Refrigerant Removal, Recovery, and Evacuation 231 Component Replacement/

FAQs

Which major topics are covered beyond safety information?

The manual covers specifications, installation, operation, maintenance, troubleshooting with diagnostic codes, components testing, sealed system (refrigerant cycle) repair, and wiring diagrams.

Oct 22, 2026

Upload by sagouaw