Vertiv Liebert SRC-G Series

vincentfordAug 25, 2025

How to fix a high pressure alarm on Vertiv Air Conditioner?

D
Darlene WardAug 26, 2025
To address a high pressure alarm on your Vertiv Air Conditioner, start by checking for sufficient airflow across the condenser. Remove any debris from the coil and airflow inlet, and check the fan speed function of the control board. Also, inspect the condenser fan to ensure it is operating; check that the connections of the control board to the outdoor unit terminals are firmly connected and that the condensate pressure sensor works normally. Lastly, examine the high-pressure switch and its connections, checking its on-off condition when the power is turned off; if necessary, replace it with a high-pressure switch of the same specification.

Brand	Vertiv
Model	Liebert SRC-G Series
Category	Air Conditioner
Language	English

Brand

Vertiv

Model

Liebert SRC-G Series

Document Overview and Styling

Purpose of the Document

Explains the purpose and scope of the user manual for the Liebert SRC-G unit.

Styling Used in this Guide

Defines the visual styles used in the manual for warnings, cautions, and notes.

Version History

Records the revision history and changes made to the document.

Safety Precautions and Measures

Key Safety Guidelines

Details critical safety precautions and measures to be followed during installation and maintenance.

Chapter 1: Overview

1.1. Product Introduction

Introduces the Liebert SRC-G as a wall-mounted precision air conditioner for equipment rooms.

1.2. Model Description

Explains the 18-digit nomenclature used to define Vertiv Liebert SRC-G series models.

1.4. Main Components

Describes the key components of the indoor and outdoor units, including cabinet, coils, and fans.

Chapter 2: Mechanical Installation

2.1. Unpacking and Inspection

Guides on how to unpack and inspect the Liebert SRC-G unit components after delivery.

2.2. Installation Notes

Provides important considerations and recommendations for the installation of the Liebert SRC-G unit.

2.6. Indoor Unit Installation Procedure

Outlines the steps and requirements for installing the indoor unit, including room and space considerations.

2.8. Refrigeration Piping Connection General Principles

Explains the general principles and requirements for connecting the refrigeration piping for the unit.

Chapter 3: Electrical Installation

3.2. Installation Notes

Lists essential notes and regulations for power and control cabling, and ground connections.

3.3. Indoor Unit Connection

Details the procedure for connecting power supply and control cables to the indoor unit.

3.4. Outdoor Unit Connection

Explains how to connect the cables to the outdoor unit's terminal block.

Chapter 4: Start-up Commissioning

4.1. Start-up Inspection

Lists inspection requirements for unit components before commissioning to ensure proper operation.

4.2. Function Testing

Describes how to perform function testing for cooling and dehumidifying modes of the unit.

Chapter 5: Controller Operation Instructions

5.1. Feature

Highlights the features of the microprocessor controller, including display, password protection, and communication.

5.3. Control Interface

Explains the control interface, including function buttons and their operations.

5.4. Menu Structure

Details the menu structure, including alarm, setpoint, system status, and help menus.

5.7. System Menu

Covers system setup, outdoor unit options, and optional functions within the controller menu.

Chapter 6: System Operation and Maintenance

6.1. Electrical Inspection

Guides on inspecting electrical components like control boards, power boards, and connections.

6.2. Indoor Unit Maintenance

Covers maintenance procedures for the indoor unit, including filter, fan, and drain pipe.

6.4. Monthly Routine Maintenance

Lists monthly inspection items for system components to ensure normal function and check for wear.

Chapter 7: Troubleshooting

Troubleshooting Common Issues

Provides a guide for troubleshooting common issues like unit not starting, no cooling, and display anomalies.

Appendix I: Menu Structure

Controller Menu Navigation

Presents a visual representation of the controller's menu hierarchy and navigation flow.

Vertiv Liebert SRC-G Series - User Manual

Table of Contents

Questions and Answers