Fujitsu AOYR18LCC User Manual (English)

Other manuals for Fujitsu AOYR18LCC

Servise Manual17 pages

Service Manual140 pages

Questions and Answers:

D
Deanna MitchellAug 20, 2025
Why my Fujitsu AOYR18LCC Air Conditioner does not operate at all?
- J
  jenniferrobbinsAug 20, 2025
  If your Fujitsu Air Conditioner isn't operating, and the Operation Lamp and Timer Lamp aren't lit, you should check a few things: * Ensure the input power voltage from the exclusive circuit AC outlet is normal. * Make sure the AC plug is securely inserted into the AC outlet and isn't loose. * Verify that any connected cables are wired correctly. * Confirm that each connector is securely inserted.
J
jacksonrobinAug 22, 2025
What to do if my Fujitsu AOYR18LCC shows excessive high pressure protection on cooling?
- M
  Melvin BrownAug 22, 2025
  If your Fujitsu Air Conditioner is showing an excessive high pressure protection error during cooling, check the following: * Ensure that heat radiation is not blocked at the inlet or outlet. * Verify that the outdoor fan is functioning correctly and rotating. * Check for any issues with the refrigeration cycle.
C
Christopher PetersAug 25, 2025
What causes IPM protection in my Fujitsu AOYR18LCC?
- W
  wagnersusanAug 25, 2025
  If your Fujitsu Air Conditioner is showing IPM protection, it indicates that an abnormal current value has been detected. Here's what you should check: * Ensure that heat radiation is not blocked at the inlet or outlet. * Verify that the outdoor fan is functioning correctly and rotating. * The controller PCB might be defective.
K
Kerri SmithAug 26, 2025
What to do if my Fujitsu AOYR18LCC Air Conditioner has indoor fan lock error?
- A
  April EdwardsAug 27, 2025
  If your Fujitsu Air Conditioner displays an indoor fan lock error, it means the indoor fan speed is 0 rpm after 56 seconds from starting or changing the fan mode. Here’s what to check: * Check the fan motor connector for looseness or defective contact. * The fan motor might be defective. * The controller PCB might be defective.
V
Victor CohenAug 27, 2025
What to do if my Fujitsu AOYR18LCC Air Conditioner has indoor fan speed error?
- R
  Robert GilmoreAug 27, 2025
  If your Fujitsu Air Conditioner displays an indoor fan speed error, it means the indoor fan speed is 1/3 of the target frequency after 56 seconds from starting or changing the fan mode. Here’s what to check: * Check the fan motor connector for looseness or defective contact. * The fan motor might be defective. * The controller PCB might be defective.
W
William NguyenAug 29, 2025
What causes a room temperature thermistor defective in Fujitsu AOYR18LCC?
- T
  terrythomasAug 29, 2025
  If your Fujitsu Air Conditioner shows a room temperature thermistor defect, it means the thermistor detected an abnormal temperature when the power was turned on. Check the thermistor resistance value. The controller PCB might be defective.
K
Kimberly MedinaAug 31, 2025
What does main relay error mean on Fujitsu AOYR18LCC?
- D
  danielleclarkAug 31, 2025
  If your Fujitsu Air Conditioner displays a main relay error, it means that after 2 minutes 20 seconds of stopping operation, the signal from the outdoor unit is received even though the main relay is OFF. The main relay might be defective or the Controller PCB might be defective.
T
tiffanyalexanderSep 2, 2025
Why Fujitsu Air Conditioner shows serial reverse transfer error at starting up operation?
- P
  pamela14Sep 2, 2025
  If your Fujitsu Air Conditioner displays a serial reverse transfer error at startup, it means the indoor unit isn't receiving a signal for 10 seconds after the power relay turns on. Check the indoor/outdoor cable connection. If the wiring is normal, measure the voltage of the outdoor unit terminals and diagnose the defective location.
J
Juan McdanielSep 4, 2025
What does serial reverse transfer error during the operation mean for Fujitsu Air Conditioner?
- N
  Nicholas ReyesSep 4, 2025
  If your Fujitsu Air Conditioner displays a serial reverse transfer error during operation, it means the indoor unit isn't receiving a signal for 10 seconds. Check the indoor/outdoor cable connection. If the wiring is normal, measure the voltage of the outdoor unit terminals and diagnose the defective location.
J
Justin SilvaSep 5, 2025
Why Fujitsu Air Conditioner shows serial forward transfer error at starting up operation?
- D
  dustin51Sep 5, 2025
  If your Fujitsu Air Conditioner displays a serial forward transfer error at startup, it means the outdoor unit isn't receiving a signal for 10 seconds after the power relay turns on. Check the indoor/outdoor cable connection. If the wiring is normal, measure the voltage of the outdoor unit terminals and diagnose the defective location.

Fujitsu AOYR18LCC Specifications

General

Brand	Fujitsu
Model	AOYR18LCC
Category	Air Conditioner
Language	English

Summary

Specifications

Model details, electrical data, fan motor specs, dimensions, weights, noise, and pipe thickness.

Specifications

Continuation of specifications for various models.

Specifications

Continuation of specifications for various models.

Specifications

Continuation of specifications for various models.

Dimensions

Overall dimensions for indoor and outdoor units.

Dimensions

Continuation of dimensions for ASYA07/09LCC, AOYR07/09LCC.

Dimensions

Continuation of dimensions for ASYA12LCC, AOYR12LCC.

Dimensions

Continuation of dimensions for ASYB09/12LDC, AOYS09/12LDC.

Dimensions

Continuation of dimensions for ASYA14/18LCC, AOYR14/18LCC.

Refrigerant System Diagram

Diagrams illustrating the refrigerant flow for different model groups.

Refrigerant System Diagram

Diagram for ASYA07/09LCC, AOYR07/09LCC.

Refrigerant System Diagram

Diagram for ASYA12LCC, AOYR12LCC, ASYB09/12LDC, AOYS09/12LDC.

Refrigerant System Diagram

Diagram for ASYA14/18LCC, AOYR14/18LCC.

Circuit Diagram

Electrical wiring diagrams for various model series.

Circuit Diagram

Diagram for ASYA07LCC / AOYR07LCC, ASYA09LCC / AOYR09LCC.

Circuit Diagram

Diagram for ASYA12LCC / AOYR12LCC.

Circuit Diagram

Diagram for ASYB09LDC / AOYS09LDC, ASYB12LDC / AOYS12LDC.

Circuit Diagram

Diagram for ASYA14LCC / AOYR14LCC, ASYA18LCC / AOYR18LCC.

Description of Control Operations

Cooling Operation

Controls compressor frequency based on room and outdoor temperatures for optimal cooling.

Heating Operation

Controls compressor frequency based on room and outdoor temperatures for optimal heating.

Dry Operation

Manages compressor frequency and indoor fan for dry operation mode.

Auto Changeover Operation

Automatically switches between modes based on temperature.

Indoor Fan Control

Details fan speed settings and operation for different modes.

Cool Air Prevention Control (Heating Mode)

Controls indoor fan speed to prevent cold air during heating mode.

Outdoor Fan Control

Louver Control

Compressor Control

Timer Operation Control

Sleep Timer

Adjusts set temperature automatically during sleep timer operation.

Operation Controls and Protections

Electronic Expansion Valve Control

Manages the electronic expansion valve opening based on system conditions.

Test Operation Control

Procedure for running the unit in a test mode for diagnostics.

Prevent to Restart for 3 Minutes

Safety feature preventing rapid compressor restarts.

Four-Way Valve Extension Select

Control logic for the four-way valve.

Auto Restart

Function to resume operation with previous settings after power interruption.

Additional Operation Modes

Manual Auto Operation (Indoor Unit)

Allows basic operation via indoor unit buttons when remote is unavailable.

Forced Cooling Operation

Initiates cooling operation regardless of room temperature for quick cooling.

Compressor Preheating

Heats the compressor to improve warm air discharge upon startup.

Coil Dry or Air Clean Operation Control

Controls for coil drying and air purification functions.

Defrost Operation Control

Defrost Flow Chart

Illustrates the conditions and sequence for defrost operation.

Off Defrost Operation Control

Various Protections

Antifreezing Control (Cooling and Dry Mode)

Prevents indoor heat exchanger freezing by adjusting compressor frequency.

Cooling Pressure Overrise Protection

Stops compressor if high pressure is detected during cooling.

High Temperature Release Control (Heating Mode)

Reduces compressor frequency based on indoor heat exchanger temperature in heating.

Refrigerant Caution -R410A

R410A Tools

Lists and describes specialized tools required for R410A refrigerant handling.

Precaution for Installation

Important considerations for installing systems with R410A refrigerant.

R410A Refrigerant Handling

Details proper procedures for handling moisture, air, refrigerant, and compressor oil.

Precaution for Servicing

Precautions for servicing units using new refrigerants compared to older ones.

New Refrigerant R410A

Information on R410A, its phase-out schedule, and HFC properties.

Refrigerant Characteristics Comparison

Explains ozone depletion, defines CFC/HCFC/HFC, and compares refrigerant properties.

R407C and R410A Characteristics Summary

Compares R407C and R410A, and provides R410A pressure/temperature data.

Difference from Conventional Model (R22) and Precautions

Trouble Shooting

Unit Does Not Operate

Troubleshooting guide for a unit that does not operate at all.

Self-Diagnosis Function

Explains the self-diagnosis function and how to read error indications.

Serial Signal Receiving Error

Procedures to diagnose and resolve serial signal receiving errors.

IPM Protection

Identifies causes and checks for IPM protection faults in the outdoor unit.

Trouble Shooting of Refrigerant Cycle

Diagnostic table and methods for refrigerant cycle related issues.

Appending Data

Jumper Setting

Instructions for setting indoor and outdoor unit jumper configurations.

Performance Curves

Presents cooling and heating performance data curves for specific models.

Performance Curves

Continuation of performance curves for heating mode.

Performance Curves

Continuation of performance curves for cooling mode.

Performance Curves

Continuation of performance curves for heating mode.

Performance Curves

Continuation of performance curves for cooling mode.

Performance Curves

Continuation of performance curves for heating mode.

Thermistor Resistance Values

Tables and graphs showing thermistor resistance versus temperature.

Capacity/Input Data Curves

Heating capacity and input data curves for ASYA09LCC.

Capacity/Input Data Curves

Cooling capacity and input data curves for ASYA09LCC.

Capacity/Input Data Curves

Heating capacity and input data curves for ASYA12LCC.

Capacity/Input Data Curves

Cooling capacity and input data curves for ASYA12LCC.

Capacity/Input Data Curves

Heating capacity and input data curves for ASYA18LCC.

Capacity/Input Data Curves

Cooling capacity and input data curves for ASYA18LCC.

Capacity/Input Data Curves

Heating capacity and input data curves for ASYB09LDC.

Capacity/Input Data Curves

Cooling capacity and input data curves for ASYB09LDC.

Capacity/Input Data Curves

Heating capacity and input data curves for ASYB12LDC.

Capacity/Input Data Curves

Cooling capacity and input data curves for ASYB12LDC.

Replacement Parts

Replacement Parts Diagrams

Exploded views of internal components for various models.

Replacement Parts Diagrams

Continuation of exploded views for indoor units.

Replacement Parts Diagrams

Continuation of exploded views for outdoor units.

Replacement Parts Diagrams

Continuation of exploded views for outdoor units.

Replacement Parts Diagrams

Continuation of exploded views for outdoor units.

Replacement Parts Diagrams

Continuation of exploded views for indoor units.

Replacement Parts Diagrams

Continuation of exploded views for indoor units.

Replacement Parts Diagrams

Continuation of exploded views for outdoor units.

Replacement Parts Diagrams

Continuation of exploded views for indoor units.

Replacement Parts Diagrams

Continuation of exploded views for indoor units.

Replacement Parts Diagrams

Continuation of exploded views for outdoor units.

Replacement Parts Diagrams

Continuation of exploded views for outdoor units.

Replacement Parts Diagrams

Continuation of exploded views for indoor units.

Replacement Parts Diagrams

Continuation of exploded views for indoor units.

Replacement Parts Diagrams

Continuation of exploded views for outdoor units.

Replacement Parts Diagrams

Wiring lead wire process for AOYR07/09LCC.

Replacement Parts Diagrams

Connection of leads to inverter assy for AOYR07/09LCC.

Replacement Parts Diagrams

Shaping of leads to inverter assy for AOYR07/09LCC.

Replacement Parts Diagrams

Cross-sectional views of lead wire routing.

Replacement Parts Diagrams

Attachment of inverter assy for AOYR14/18LCC.

Replacement Parts Diagrams

Lead connections to inverter assy for AOYR14/18LCC.

Replacement Parts Diagrams

Lead routing for inverter assy for AOYR14/18LCC.

Replacement Parts Diagrams

Lead fixing for thermistor and motor for AOYR14/18LCC.

Installation Manual

General Installation Precautions and Electrical Requirements

Essential guidelines, electrical needs, and mounting position guidelines for installation.

Standard Accessories

Lists standard parts supplied with the unit for installation.

Selecting the Mounting Position

Guidelines for choosing optimal indoor and outdoor unit locations.

Indoor Unit Installation Procedures

Detailed steps for installing the indoor unit, including bracket mounting.

Outdoor Unit Installation Procedures

Detailed steps for installing the outdoor unit, including mounting and securing.

Piping and Wiring Procedures

Steps for connecting pipes, hoses, wiring, and finishing the installation.

Test Running

Steps to verify correct operation after installation.

R410A Installation Requirements

Covers general warnings, specialized tools, and copper pipe specifications for R410A.

Air Purge and Vacuuming

Procedures to remove air from the refrigerant system using a vacuum pump.

Related product manuals

Fujitsu AOYR18LCC User Manual

Table of Contents

Other manuals for Fujitsu AOYR18LCC

Questions and Answers:

Fujitsu AOYR18LCC Specifications

Summary

Specifications

Specifications

Specifications

Specifications

Specifications

Dimensions

Dimensions

Dimensions

Dimensions

Dimensions

Dimensions

Refrigerant System Diagram

Refrigerant System Diagram

Refrigerant System Diagram

Refrigerant System Diagram

Refrigerant System Diagram

Circuit Diagram

Circuit Diagram

Circuit Diagram

Circuit Diagram

Circuit Diagram

Circuit Diagram

Description of Control Operations

Cooling Operation

Heating Operation

Dry Operation

Auto Changeover Operation

Indoor Fan Control

Cool Air Prevention Control (Heating Mode)

Outdoor Fan Control

Louver Control

Compressor Control

Timer Operation Control

Sleep Timer

Operation Controls and Protections

Electronic Expansion Valve Control

Test Operation Control

Prevent to Restart for 3 Minutes

Four-Way Valve Extension Select

Auto Restart

Additional Operation Modes

Manual Auto Operation (Indoor Unit)

Forced Cooling Operation

Compressor Preheating

Coil Dry or Air Clean Operation Control

Defrost Operation Control

Defrost Flow Chart

Off Defrost Operation Control

Various Protections

Antifreezing Control (Cooling and Dry Mode)

Cooling Pressure Overrise Protection

High Temperature Release Control (Heating Mode)

Refrigerant Caution -R410A

R410A Tools

Precaution for Installation

R410A Refrigerant Handling

Precaution for Servicing

New Refrigerant R410A

Refrigerant Characteristics Comparison

R407C and R410A Characteristics Summary

Difference from Conventional Model (R22) and Precautions

Trouble Shooting

Unit Does Not Operate

Self-Diagnosis Function

Serial Signal Receiving Error

IPM Protection

Trouble Shooting of Refrigerant Cycle

Appending Data

Jumper Setting

Performance Curves

Performance Curves

Performance Curves

Performance Curves

Performance Curves