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Fujitsu ASU18RLQ

Fujitsu ASU18RLQ
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SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED
type
Models Indoor unit Outdoor unit
ASU15RLQ
ASU18RLQ
AOU15RLQ
AOU18RLQ
INVERTER
SERVICE
INSTRUCTION
R410A

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Fujitsu ASU18RLQ Specifications

General IconGeneral
Seasonal Energy Efficiency Ratio (SEER)16.0
Coefficient of Performance (COP)3.5
Cooling Capacity18000 BTU/h
Power Supply208-230V, 60Hz
RefrigerantR410A

Summary

SPECIFICATIONS

DIMENSIONS

REFRIGERANT SYSTEM DIAGRAM

CIRCUIT DIAGRAM

DESCRIPTION OF EACH CONTROL OPERATION

COOLING OPERATION

Controls compressor operation based on temperature differences and outdoor conditions.

HEATING OPERATION

Controls compressor operation based on temperature differences and outdoor conditions.

DRY OPERATION

Controls compressor frequency based on detected room temperature variation.

AUTO CHANGEOVER OPERATION

Automatically switches modes based on temperature changes.

INDOOR FAN CONTROL

Details indoor fan speeds and operation modes.

OUTDOOR FAN CONTROL

Provides outdoor fan speeds and behavior based on compressor frequency and temperature.

LOUVER CONTROL

Manages vertical louver position and swing operation for airflow direction.

COMPRESSOR CONTROL

Explains compressor operation frequency ranges and startup control.

TIMER OPERATION CONTROL

Describes ON, OFF, program, and sleep timer functions.

ELECTRONIC EXPANSION VALVE CONTROL

TEST OPERATION CONTROL

PREVENT TO RESTART FOR 3 MINUTES (3 MINUTES ST)

FOUR-WAY VALVE EXTENSION SELECT

AUTO RESTART

MANUAL AUTO OPERATION (Indoor unit body operation)

FORCED COOLING OPERATION

COMPRESSOR PREHEATING

COIL DRY OR AIR CLEAN OPERATION CONTROL

COIL DRY OPERATION CONTROL

Explains the coil-dry operation function and its duration.

AIR CLEAN OPERATION CONTROL

Details the air clean operation function, which performs sterilization.

DEFROST OPERATION CONTROL

CONDITION OF STARTING THE DEFROST OPERATION

Specifies conditions for initiating defrost operation based on temperature.

CONDITION OF THE DEFROST OPERATION COMPLETION

Outlines the conditions for ending the defrost operation.

OFF DEFROST OPERATION CONTROL

OFF DEFROST OPERATION CONDITION

Defines the conditions for off defrost operation in heating mode.

OFF DEFROST END CONDITION

Specifies the conditions for ending the off defrost operation.

VARIOUS PROTECTIONS

DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL

Protects against high discharge gas temperature by adjusting compressor frequency.

CURRENT RELEASE CONTROL

Controls compressor frequency to prevent exceeding outdoor unit input current limits.

ANTIFREEZING CONTROL (Cooling and Dry mode)

Prevents freezing by decreasing compressor frequency when indoor heat exchanger temperature is low.

COOLING PRESSURE OVERRISE PROTECTION

Stops the compressor if outdoor heat exchange sensor temperature rises.

HIGH TEMPERATURE RELEASE CONTROL (HEATING MODE)

Controls compressor frequency based on indoor heat exchanger temperature during heating.

REFRIGERANT CAUTION -R410 A-

1. R410 A TOOLS

Lists necessary tools and equipment for R410A refrigerant installation and servicing.

2. PRECAUTION FOR INSTALLATION

Provides precautions for installing R410A refrigerant pipes and flare nuts.

3. PRECAUTION FOR SERVICING

Highlights differences in refrigerant oil and pressure for R410A compared to R22.

4. NEW REFRIGERANT R410 A

Explains the phase-out schedule of HCFC and the nature of HFC refrigerants.

5. DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS

Discusses differences in oil, compressor, and heat exchangers with R22.

TROUBLE SHOOTING

Unit Does Not Operate

Addresses the issue where the unit does not operate and indicator lamps are off.

Self-Diagnosis Function

Describes how the self-diagnosis function memorizes errors and how to read/erase memory.

Self-Diagnosis Function and Checking Points

Details error codes, their causes, and diagnosis methods for various issues.

Serial Signal Receiving Error

Provides check points and procedures for serial signal receiving errors.

Trouble Shooting of Refrigerant Cycle

Provides diagnosis for refrigerant cycle issues and component checks.

APPENDING DATA

Jumper Setting

Details jumper settings for remote control custom codes and auto restart functions.

Outdoor Unit Performance Data

Presents graphs of outdoor unit pressure, current, capacity, and input data.

Thermistor Resistance Values

Lists resistance values for various thermistors across temperature ranges.

REPLACEMENT PARTS

Exploded Views

Shows exploded view diagrams of indoor and outdoor unit components for replacement.

Inverter Assembly Process

Details the process of attaching the inverter assembly and connecting leads.

INSTALLATION MANUAL

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