Airwell Itelco-Clima CLS 402 STD

Questions and Answers

D
Donald BrownAug 17, 2025
How to fix excessive noise in my Airwell Itelco-Clima CLS 402 STD?
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  chillAug 18, 2025
  Excessive noise in your Airwell Chiller can stem from several sources. Check the following: * Examine the lines for vibration and inspect the clamping brackets, if any, to ensure they are secure. * A whistling sound from the thermostatic expansion valve may indicate the need to refill the system. * Inspect the dehydrating filter. * A noisy compressor could have seized bearings, requiring compressor replacement. * Ensure the compressor’s locknuts are tightened.
B
Betty PhelpsAug 20, 2025
What to do if HP alarm activates and stops my Airwell Chiller?
- R
  Ryan WalshAug 21, 2025
  If the HP alarm is activated and your Airwell Chiller stops, consider these possible causes: * Check the operation of the pressure switch and replace it if it's defective. * Ensure the delivery valve is fully open; if faulty, replace it. * The presence of substances with condensable gases in the circuit may require draining the circuit. * If the condenser fan is not working, check its cables and motor; repair or replace as needed.
A
Alexander ClarkeAug 25, 2025
Why does the LP alarm activate and stop my Airwell Chiller?
- T
  Tonya RuizAug 25, 2025
  The activation of the LP alarm, which causes your Airwell Chiller to stop, can be due to: * A gas leak. Identify and remove the leak. * Insufficient charge. Refill the system. * Failure of the pressure switch. Replace the pressure switch.
C
Christopher IbarraAug 27, 2025
How to troubleshoot an Airwell Itelco-Clima CLS 402 STD Chiller that runs but doesn't cool?
- K
  Kenneth FrancisAug 28, 2025
  If your Airwell Chiller is running but not providing cooling, the issue might be: * Insufficient refrigerant. In this case, you should refill it. * A clogged dehydrating filter. If this is the case, replace it.
M
Mr. Theodore DavidsonAug 30, 2025
What causes a low oil level in the Airwell Itelco-Clima CLS 402 STD compressor?
- J
  jessicareyesAug 30, 2025
  A low oil level in your Airwell Chiller's compressor can be caused by: * One or more gas or oil leaks in the circuit. Identify and remove any leaks. * Mechanical failure of the compressor. Request the intervention of a Service Centre. * Anomaly of the oil heater of the compressor’s base. Check the electric circuit and the resistor of the heater of the motor base, and replace defective components.
D
Derrick BellSep 3, 2025
Why is there ice forming on the suction line of my Airwell Chiller?
- K
  Kimberly HarringtonSep 3, 2025
  Ice formation on the suction line of your Airwell Chiller can be caused by: * Wrong calibration of overheating. Increase overheating. * Check the charge.
D
Danny LopezSep 6, 2025
What causes frosting on the liquid line of my Airwell Itelco-Clima CLS 402 STD Chiller?
- H
  Heather BrownSep 6, 2025
  Frosting on the liquid line of your Airwell Chiller can occur if: * The valve of the liquid line is partially closed. Check that valves are open. * The liquid filter is clogged. Replace the cartridge or the filter.
M
Maria GreenSep 10, 2025
Why is the liquid line of my Airwell Itelco-Clima CLS 402 STD too hot?
- L
  Laura JamesSep 10, 2025
  If the liquid line of your Airwell Chiller is too hot, it may be due to insufficient charge. Identify and remove the cause of the loss of charge and refill.
A
Andrew MorganNov 13, 2025
What to do if one or both Airwell Itelco-Clima CLS 402 STD compressors are not working?
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  Zachary SantosNov 13, 2025
  If one or both compressors in your Airwell Chiller are not working, there are several potential causes to investigate: * Check the electric circuit for ground dispersions and short circuits, and also check the fuses. Replace fuses if needed. * Inspect for loosened terminals and tighten them. * See if the HP pressure switch has intervened; if so, reset it and the control panel, then restart the appliance after identifying and resolving the cause. * Look for thermal overload in the electric circuit and address the cause. * Verify the wiring of check and safety devices. * Ensure the line voltage is adequate; if too low, address system issues or inform the Energy Distributor if the problem lies with the distribution network. * Check the compressor’s motor for a short-circuit by ...

Summary

1 FOREWORD

1.1 Introduction

General introduction to Itelco-Clima units and the manual.

1.2 Warranty

Details warranty conditions and exclusions for the unit.

1.3 Emergency Stop and Normal Stop

Explains how to perform emergency and normal stops on the unit.

1.4 Introduction to the Manual

Explains manual conventions and safety information.

2 SAFETY

2.1 Foreword

General safety compliance and installation requirements.

2.2 Definitions

Defines roles like OWNER and INSTALLER.

2.3 Access to the Unit

Specifies access requirements and safety for personnel.

2.4 General Precautions

Lists precautions for operators and installers.

2.5 Precautions Against Residual Risks

Details risks related to control, mechanical, and electrical systems.

2.6 Precautions During Maintenance Operations

Outlines safety measures before and during maintenance.

2.7 Safety Plates

Describes identification labels affixed to the unit.

2.8 Safety Regulations

Details safety data for refrigerants and oils.

3 TRANSPORT, LIFTING AND POSITIONING

3.1 Inspection

Instructions for checking the unit upon delivery.

3.2 Lifting

Guidelines and precautions for safely lifting the unit.

3.3 Anchoring

Notes on securing the unit to foundations.

3.4 Storage

Precautions for storing the unit before installation.

4 INSTALLATION

4.1 Positioning of the Unit

Guidelines for selecting the unit's installation location.

4.2 Installation of Spring Shock Absorbers

Procedure for installing optional vibration-reducing supports.

4.3 External Hydraulic Circuit

Requirements for the external hydraulic system.

4.4 Hydraulic Connection

Details on connecting the unit's water fittings.

4.5 Draining the Defrosting Waste Water

Instructions for heat pump units regarding defrost water.

4.6 Power Supply

Safety precautions for electrical connections.

4.7 Electrical Connections

Detailed requirements for electrical hook-up.

5 START-UP

5.1 Preliminary Check

Essential checks before unit start-up.

5.2 Start-up

Step-by-step procedure for initial unit operation.

5.3 Checking the Operation

Key parameters to check during unit operation.

5.4 Delivery to the Customer

Instructions for user training upon delivery.

6 CONTROL

6.1 General Information

Overview of the unit's control and monitoring system.

6.2 Control System

Details on temperature regulation and antifreeze functions.

6.3 Display

Explanation of the control panel display and LED indicators.

6.4 Start-up

Procedure for starting different unit models.

6.5 Switching the Working Temperature

How to change operating modes (cooling/heating).

6.6 Main Alarms

List and description of common unit alarms.

7 GENERAL DESCRIPTION

7.1 Introduction

Introduction to CLS/CLH units and their applications.

7.2 General Specifications

Details on unit construction, materials, and testing.

7.3 Compressors

Information on the hermetic scroll compressors used.

7.4 Refrigeration Circuits

Description of the unit's dual refrigeration circuits.

7.5 Water Heat Exchanger

Details on the stainless steel plate type evaporators.

7.6 Air Heat Exchanger

Description of the copper coil and aluminium finned pack.

7.7 Fans

Information on axial type condenser fans.

7.8 Electric Power Supply and Control System

Description of the control compartment and its components.

7.9 Accessories

List of optional accessories available for installation.

8 TECHNICAL DATA

8.1 Pressure Drops in the Evaporator

Table showing pressure drop values for various models.

8.2 Technical Data

Comprehensive technical specifications covering various CLS/CLC/CLH model series and configurations.

8.3 Unit Electrical Data

Electrical specifications including voltage, power, current, and cable sizing.

8.4 Position of Shock Absorbers and Weight Distribution on Supports

Support positions and weight distribution for basic and pumped units.

8.5 Overall Dimensions

Dimensional drawings and measurements for various unit models.

8.6 Service Spaces

Required clearance for installation and service of single and multiple units.

9 MAINTENANCE

9.1 General Requirements

General requirements for unit maintenance.

9.2 Planned Maintenance

Scheduled maintenance tasks and frequency.

9.3 Refrigerant Charge

Procedures and precautions for refrigerant charging.

9.4 Compressor

Information on compressor maintenance and replacement.

9.5 Condenser

Guidelines for cleaning and maintaining the condenser coils.

9.6 Fans

Instructions for checking fan rotation and maintenance.

9.7 Dehydrating Filter

Maintenance and checks for the dehydrating filter.

9.8 Sight Glass

Using the sight glass for refrigerant flow and humidity checks.

9.9 Thermostatic Expansion Valve

Procedure for checking and adjusting overheating.

9.10 Evaporator

Maintenance advice for the evaporator heat exchanger.

10 TROUBLESHOOTING

11 SPARE PARTS

11.1 Spare Part List

List of recommended spare parts for initial operation.

11.2 Oil for Compressors

Information on the type of oil used in compressors.

11.3 Wiring Diagrams

Location and request procedure for wiring diagrams.

12 DISMANTLING, DEMOLITION AND SCRAPPING

12.1 Generalities

General procedures for unit disassembly and disposal.