Installer and user reference guideAir-cooled refrigeration condensing unit EnglishInstaller and userreference guideAir-cooled refrigeration condensing unitLRMEQ3BY1LRMEQ4BY1LRLEQ3BY1LRLEQ4BY1

Daikin LRMEQ4BY1 Installer And User Manual

Outdoor unit

About the indoor units

Refrigerant piping requirements

Preparing electrical wiring

To install the outdoor unit

To remove the pinched pipes

Guidelines when installing a sight glass

Checking the refrigerant piping

Checking refrigerant piping: General guidelines

To determine the additional refrigerant amount

Error codes when charging refrigerant

Connecting the electrical wiring

Guidelines when knocking out knockout holes

Making field settings

Mode 1 (and default situation): Monitoring settings

Mode 2: Field settings

To connect the PC configurator to the outdoor unit

To perform a test run (7-LEDs display)

Error codes: Overview

Piping diagram: Outdoor unit

Wiring diagram: Outdoor unit

System layout

Symptoms that are NOT system malfunctions

Symptom: Dust comes out of the unit

LRMEQ3BY1

Version Log

Introduction

outdoor unit

Standard Specification

Set Values for Functional Components and Protection Devices

Operation Conditions

Piping Connection Diagram

Wiring Diagram

Piping Diagram

Description and Layout of Functional Parts and Piping Diagram

External Wiring Diagram

Cooling Capacity Characteristics

Field Settings

Evaporation temperature correction at night-time, using an external contact

External Output Settings

Revolution of Condenser Fan Limiting

Low Noise Mode Setting

Change of INV Compressor Load-up Rate

Setting in service mode

Setting at replacement by spare PCB

fan adjustment

Description of Functions and Operation

Outline of Functions

Detailed Description of Functions

compressor control

Test Operation

To Piping Work Contractors

Selection of Piping Material

Dryer Installation

Precautions for Piping

Field Wiring

Inspection and Pipe Insulation

Thermal Insulation Work

Checks after Work Completion

To charge refrigerant

Precautions for refrigerant cylinder

Checklist before commissioning

Checklist during commissioning

Operating the unit

Troubleshooting

Checking Error Codes by LED Lamps on PCB

Checking Error Codes

Troubleshooting by RAM Monitor

Flow Chart for Troubleshooting

Inverter Compressor Motor Lock

Outdoor Unit Fan Motor Abnormality

Electronic Expansion Valve Coil Abnormality

Abnormal Discharge Pipe Temperature

Wet Operation from Refrigeration Suction Pipe

Wet Operation from Injection Pipe

sensor Abnormality

High Pressure Switch Abnormality

Outdoor Unit Fan Motor Signal Abnormality

Outdoor Air Thermistor Abnormality

Thermistor Abnormality

High Pressure Sensor Abnormality

Low Pressure Sensor Abnormality

Inverter PCB Abnormality

Inverter Radiation Fin Temperature Rise

INV. Compressor Instantaneous Overcurrent

INV. Compressor Overload

INV. Compressor Startup Abnormality

Transmission Error (between Inverter PCB and Outdoor Unit Main PCB)

Power Supply Voltage Imbalance

Radiation Fin Thermistor Abnormality

Reverse Phase / Open Phase

Abnormal Power Supply Voltage

Maintenance

Appendix (Supplementary Information)

Precautions when Selecting a Thermal Expansion Valve

Option List

LRMEQ4BY1

LRLEQ3BY1

LRLEQ4BY1

Mini-ZEAS LRLEQ-BY

Mini-ZEAS LRLEQ-BY1

Mini-ZEAS LRMEQ-BY1