Gree LSQWRF35VM/NhA-M User Manual

Service Manual
Change for life
A series modular air-cooled chiller (heat pump)
T1/ R410A /50Hz
T1/ R32 /50Hz

Gree LSQWRF35VM/NhA-M Specifications

General

Cooling Capacity	35 kW
Refrigerant	R410A
Power Supply	380-415V/3Ph/50Hz
Noise Level	65 dB(A)
Weight	450 kg
Type	Air-cooled Scroll Chiller

Summary

1 Product information

1.4 Technical parameters

Detailed specifications including electrical and performance data.

1.4.2 Performance parameters

Performance data like cooling/heating capacity, sound level, and dimensions.

2 Unit control

2.3 Key control logics

Detailed explanations of control logic for various functions and protections.

2.3.8 Protection

Details on recoverable and irrecoverable protection mechanisms.

3 Unit installation

3.2 Preparations before installation

Safety precautions and important considerations before starting installation.

3.2.1 Precautions for installation

Detailed warnings and cautions for safe and proper installation.

3.3 Installation instructions

Step-by-step guide for installing the unit and its components.

3.3.1 Outline dimensions

3.3.6 Handling and lifting

3.4 Piping and insulation

Instructions for connecting water pipes and applying insulation.

3.4.1 Installation of the water system

3.4.2 Requirements on piping

3.5 Electrical connection

Instructions for wiring the unit, including safety precautions.

3.5.1 Safety precautions

Essential safety measures before and during electrical connections.

3.5.2 External connection

3.5.3 Specification of power supply

3.5.4 Wiring of the electric control cabinet

3.5.5 Field wiring

3.5.6 Networking and wiring between units

3.5.7 Electric wiring diagram

Detailed wiring diagrams for various unit models.

4 Test operation, troubleshooting and maintenance

4.1 Commissioning

Procedures and safety measures for unit commissioning.

4.1.1 Flowchart of commissioning

4.1.2 Safety precautions for commissioning

Critical safety warnings to follow during commissioning.

4.1.3 Preparation before commissioning

4.1.4 Check before commissioning

4.1.5 Check for initial run

Steps to perform for initial unit run and checks.

4.2 Troubleshooting

Guidance on diagnosing and resolving common unit issues.

4.2.1 Diagnostics

Table of diagnostic names, signal sources, and descriptions of errors.

4.2.2 Flow chart of troubleshooting

Flowcharts for troubleshooting specific protection modes like high pressure.

4.3 Power distribution

4.3.3 Main board

4.4 Replacement of main parts

Procedures for replacing major components of the unit.

4.4.1 Brief introduction

4.4.2 Replacement instructions

Step-by-step guides for replacing specific parts like the compressor.

4.5 Routine maintenance

Procedures for regular maintenance tasks and refrigerant handling.

4.5.1 Repairs to refrigerant leakage

Methods for detecting and repairing refrigerant leaks.

4.5.2 Air removal

4.6 Exploded views and part lists

4.7 Maintenance

Requirements for routine and periodic maintenance, including water quality.

4.7.1 Requirements for maintenance

Checklist for routine and periodic maintenance tasks.

4.7.2 Freeze protection in winter