Friedrich FPHW091A User Manual (English)

Questions and Answers:

T
Tiffany StewartAug 21, 2025
Why is there a communication failure between my Friedrich FPHW091A Air Conditioner's indoor and outdoor units?
- M
  Mrs. Tanya JohnsonAug 21, 2025
  A communication failure between the indoor and outdoor units of your Friedrich Air Conditioner can occur for several reasons: * The communication cable connector may be loose; ensure it is securely connected. * The communication cable itself might be faulty and need replacement. * The connection between the filter board and the outdoor control board or terminal might be incorrect or loose; verify these connections are correct and secure. * A failure in the indoor control board, PFC board, power board, or outdoor control board could also be the cause, requiring replacement of the respective board.
L
Lauren GonzalezAug 22, 2025
What to do about communication trouble between my Friedrich Air Conditioner's outdoor unit and driver?
- D
  diazdeannaAug 23, 2025
  Communication trouble between the outdoor unit and driver of your Friedrich Air Conditioner can be due to: * Loose connection wires; secure any loose connection wires. * A failed outdoor board or drive board; replace the outdoor board or drive board.
K
Krista CollinsAug 25, 2025
How to fix communication failure between indoor and outdoor unit of Friedrich Air Conditioner?
- J
  Jennifer ColemanAug 25, 2025
  A communication failure between the indoor and outdoor units of your Friedrich Air Conditioner can occur for several reasons: * The communication cable connector may be loose; ensure it is securely connected. * The connection between the filter board and the terminal might be incorrect or loose; verify the connection is correct and secure. * The communication cable itself might be faulty and need replacement. * The connection between the filter board and the outdoor control board might be incorrect or loose; verify the connection is correct and secure. * A failure in the indoor control board, PFC board, power board, or outdoor control board could also be the cause, requiring replacement of the respective board.
S
Steven PetersonAug 27, 2025
What to do if my Friedrich FPHW091A has current overload protection?
- N
  Natalie YatesAug 27, 2025
  If your Friedrich Air Conditioner is experiencing current overload protection, it could be due to: * The fan motor running abnormally, in which case you should check and repair the fan motor. * Dirty condenser and evaporator coils, so you should clean them. * Abnormal air inlet and outlet; ensure that they are unobstructed.
D
David HernandezAug 28, 2025
What causes maximum current protection in my Friedrich FPHW091A?
- A
  Ashley MartinezAug 28, 2025
  Maximum current protection in your Friedrich Air Conditioner can be triggered by a short circuit. This could be in the outdoor control board, the drive board, or other components. It is suggested to replace the outdoor control board or drive board if they are short-circuited. Inspect and replace any other short-circuited components.
P
pricestevenAug 29, 2025
Why does my Friedrich Air Conditioner show compressor exhaust temperature too high protection?
- S
  stoneseanAug 29, 2025
  The compressor exhaust temperature too high protection in your Friedrich Air Conditioner might be due to: * A failed compressor exhaust temperature sensor, which would need replacement. * Low refrigerant in the unit, requiring a recharge.
K
Kevin JohnsonAug 31, 2025
How to fix AC voltage higher or lower protection on a Friedrich FPHW091A?
- M
  Michael GardnerAug 31, 2025
  AC voltage higher or lower protection on your Friedrich Air Conditioner can be caused by: * A supply voltage that is higher or lower than normal; you should correct the supply voltage. * An inner supply voltage of the unit that is higher or lower than normal; you should adjust the inner supply voltage.
G
George Wong MDSep 2, 2025
What to do if my Friedrich FPHW091A shows compressor shell temperature too high protection?
- T
  Tracy DoughertySep 2, 2025
  If your Friedrich Air Conditioner displays compressor shell temperature too high protection, it may be because: * The compressor exhaust temperature sensor connector is loose; you should secure it. * The unit has low refrigerant; you should recharge the refrigerant.
B
Brian HernandezSep 3, 2025
Why is my Friedrich Air Conditioner's outdoor fan motor locked?
- C
  Charles BrownSep 3, 2025
  The outdoor fan motor locked rotor protection in your Friedrich Air Conditioner may be triggered by: * A loose connection of the outdoor fan motor; you should secure the connection. * An obstruction blocking the outdoor fan; you should remove any obstructions. * A failed fan motor, in which case you should replace it. * A failed outdoor control board, in which case you should replace it.
M
Michelle ReynoldsSep 5, 2025
What causes a compressor drive fault in my Friedrich Air Conditioner?
- S
  Stephen GonzalesSep 5, 2025
  A compressor drive fault in your Friedrich Air Conditioner can be caused by: * A failed outdoor drive board, which would need to be replaced. * A failed compressor, which would also need replacement. * A failed outdoor control board, requiring replacement.

Friedrich FPHW091A Specifications

General

Brand	Friedrich
Model	FPHW091A
Category	Air Conditioner
Language	English

Summary

Introduction to Friedrich Air Conditioners

Important Safety Information

General safety guidelines and warnings for product use.

Model Identification Guide

Explains the model number structure and its components.

Air Conditioner Specifications

Product Specifications 9k and 12k

Detailed technical specifications for 9k and 12k models.

Product Specifications 18k, 24k and 36k

Detailed technical specifications for 18k, 24k, and 36k models.

Indoor Unit Dimensions

Physical dimensions of the indoor units.

Capacities and Selection Data

Charts detailing cooling capacities and selection criteria for various models.

Operating the Friedrich Air Conditioner

Remote Control Operation

Description and functions of the remote controller and its buttons.

Indoor Unit Basic Operation

Procedures for manual operation and specific functions like I-Feel and Timer.

Sleep Mode Functionality

How to use and the effects of the Sleep mode on cooling and heating.

Automatic Operation Mode

How the unit automatically selects operating modes based on room temperature.

Defrost Cycle Operation

Conditions and actions related to the defrost cycle in heating and cooling modes.

Installation Guide for Friedrich ACs

Installation Dimension Diagram

Visual guide showing required clearances and mounting dimensions.

Required Installation Tools

List of essential tools required for installation and maintenance procedures.

Indoor Unit Installation Steps

Step-by-step instructions for mounting the indoor unit, drilling holes, and piping.

Refrigeration System Leak Check and Charging

Detailed process for leak checking, evacuating, and charging the refrigeration system.

Installation Checklist and Operation Test

Procedures for verifying proper installation and unit functionality after setup.

Air Conditioner Maintenance Procedures

Front Panel and Shell Cleaning

Instructions for cleaning and maintaining the unit's exterior panels.

Air Filter Cleaning and Replacement

Guidelines for cleaning and replacing the air filter for optimal performance.

R-410A Sealed System Repair

Service Valve Identification and Operation

Illustrations and descriptions of the 2-way and 3-way service valves and their operation.

Refrigerant Pumping Down Procedure

Procedure for safely reducing refrigerant pressure before servicing or transferring.

Refrigerant Gas Charging After Repair

Method for recharging the system with refrigerant after repairs.

Component Testing and Diagnostics

Indoor Coil and Room Sensor Resistance

Tables showing resistance values for indoor coil and room sensors at various temperatures.

Outdoor Compressor Sensor Resistance

Tables showing resistance values for the outdoor compressor temperature sensor.

Compressor Testing Procedures

Testing procedures and common signs of compressor faults, including resistance tests.

Fan Motor Testing

Information on testing fan motor resistance and DC voltage for troubleshooting.

Printed Circuit Board Identification

Chart correlating model numbers with specific indoor and outdoor unit circuit board part numbers.

Troubleshooting Air Conditioner Faults

Outdoor Unit Diagnostic Codes

Detailed list of error codes for the outdoor unit, their descriptions, LED indicators, and root causes.

Troubleshooting Unit Not Running

A flowchart to diagnose why the unit is not operating.

Error Code 39-DC FAN Troubleshooting

Troubleshooting steps for Error Code 39 related to the indoor DC fan motor.

Error Code 13 and 8 Troubleshooting

Troubleshooting steps for Error Codes 13 (compressor over-heat) and 8 (current overload).

Error Code 15 Troubleshooting

Troubleshooting steps for Error Code 15, indicating compressor shell temperature too high.

Protection Circuit Fault Isolation

Analysis of various protection circuits like over-voltage, under-voltage, and over-current.

Wiring Diagrams for Friedrich Systems

Wiring Diagram Lookup Table

A table linking model numbers to specific indoor and outdoor unit wiring diagram numbers.

Indoor Unit Wiring Diagrams

Electrical wiring diagrams for various indoor unit models and their connections.

Outdoor Unit Wiring Diagrams

Electrical wiring diagrams for outdoor units and their connections to the system.

Friedrich Air Conditioner Parts Catalog

Parts Catalog Introduction

Overview of how to use the illustrated parts catalog to find replacement parts.

115V Indoor Unit Parts (9-12K BTU)

Illustrated parts list for 115V indoor units, 9-12K BTU models.

230V Indoor Unit Parts (9-12K BTU)

Illustrated parts list for 230V indoor units, 9-12K BTU models.

230V Indoor Unit Parts (18K BTU)

Illustrated parts list for 230V indoor units, 18K BTU models.

230V Indoor Unit Parts (24K BTU)

Illustrated parts list for 230V indoor units, 24K BTU models.

230V Indoor Unit Parts (36K BTU)

Illustrated parts list for 230V indoor units, 36K BTU models.

230V Outdoor Unit Parts (9K BTU)

Illustrated parts list for 230V outdoor units, 9K BTU models.

230V Outdoor Unit Parts (12K BTU)

Illustrated parts list for 230V outdoor units, 12K BTU models.

230V Outdoor Unit Parts (18K BTU)

Illustrated parts list for 230V outdoor units, 18K BTU models.

230V Outdoor Unit Parts (24K BTU)

Illustrated parts list for 230V outdoor units, 24K BTU models.

230V Outdoor Unit Parts (36K BTU)

Illustrated parts list for 230V outdoor units, 36K BTU models.

115V Outdoor Unit Parts (9K BTU)

Illustrated parts list for 115V outdoor units, 9K BTU models.

115V Outdoor Unit Parts (12K BTU High SEER)

Illustrated parts list for 115V outdoor units, 12K BTU High SEER models.

Appendices and Reference Information

Celsius and Fahrenheit Temperature Reference

Conversion table for temperature readings between Celsius and Fahrenheit.

Pipe Expanding Method Guide

Detailed instructions and diagrams for properly expanding refrigerant pipes.

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Friedrich FPHW091A User Manual

Table of Contents

Questions and Answers:

Friedrich FPHW091A Specifications

Summary

Introduction to Friedrich Air Conditioners

Important Safety Information

Model Identification Guide

Air Conditioner Specifications

Product Specifications 9k and 12k

Product Specifications 18k, 24k and 36k

Indoor Unit Dimensions

Capacities and Selection Data

Operating the Friedrich Air Conditioner

Remote Control Operation

Indoor Unit Basic Operation

Sleep Mode Functionality

Automatic Operation Mode

Defrost Cycle Operation

Installation Guide for Friedrich ACs

Installation Dimension Diagram

Required Installation Tools

Indoor Unit Installation Steps

Refrigeration System Leak Check and Charging

Installation Checklist and Operation Test

Air Conditioner Maintenance Procedures

Front Panel and Shell Cleaning

Air Filter Cleaning and Replacement

R-410A Sealed System Repair

Service Valve Identification and Operation

Refrigerant Pumping Down Procedure

Refrigerant Gas Charging After Repair

Component Testing and Diagnostics

Indoor Coil and Room Sensor Resistance

Outdoor Compressor Sensor Resistance

Compressor Testing Procedures

Fan Motor Testing

Printed Circuit Board Identification

Troubleshooting Air Conditioner Faults

Outdoor Unit Diagnostic Codes

Troubleshooting Unit Not Running

Error Code 39-DC FAN Troubleshooting

Error Code 13 and 8 Troubleshooting

Error Code 15 Troubleshooting

Protection Circuit Fault Isolation

Wiring Diagrams for Friedrich Systems

Wiring Diagram Lookup Table

Indoor Unit Wiring Diagrams

Outdoor Unit Wiring Diagrams

Friedrich Air Conditioner Parts Catalog

Parts Catalog Introduction

115V Indoor Unit Parts (9-12K BTU)

230V Indoor Unit Parts (9-12K BTU)

230V Indoor Unit Parts (18K BTU)

230V Indoor Unit Parts (24K BTU)

230V Indoor Unit Parts (36K BTU)

230V Outdoor Unit Parts (9K BTU)

230V Outdoor Unit Parts (12K BTU)

230V Outdoor Unit Parts (18K BTU)

230V Outdoor Unit Parts (24K BTU)

230V Outdoor Unit Parts (36K BTU)

115V Outdoor Unit Parts (9K BTU)

115V Outdoor Unit Parts (12K BTU High SEER)

Appendices and Reference Information

Celsius and Fahrenheit Temperature Reference

Pipe Expanding Method Guide

Related product manuals