Airwell Itelco-Clima CLC 402 ELN

Questions and Answers

S
stephanie29Aug 17, 2025
How to fix excessive noise in my Airwell Itelco-Clima CLC 402 ELN?
- C
  Christopher LewisAug 17, 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.
T
Thomas MorganAug 20, 2025
What to do if HP alarm activates and stops my Airwell Itelco-Clima CLC 402 ELN Chiller?
- S
  Steven ZhangAug 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.
H
hernandezjesseAug 25, 2025
Why does the LP alarm activate and stop my Airwell Itelco-Clima CLC 402 ELN Chiller?
- C
  Caroline NortonAug 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.
G
gregoryhansonAug 27, 2025
How to troubleshoot an Airwell Itelco-Clima CLC 402 ELN that runs but doesn't cool?
- M
  Mr. William KennedyAug 27, 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.
P
Paula LawrenceAug 30, 2025
What causes a low oil level in the Airwell Itelco-Clima CLC 402 ELN Chiller compressor?
- R
  richard54Aug 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.
L
Lisa HillSep 3, 2025
Why is there ice forming on the suction line of my Airwell Itelco-Clima CLC 402 ELN Chiller?
- D
  davidgordonSep 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.
T
Todd WangSep 6, 2025
What causes frosting on the liquid line of my Airwell Itelco-Clima CLC 402 ELN Chiller?
- C
  Clinton NelsonSep 7, 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.
W
Wayne DunnSep 9, 2025
Why is the liquid line of my Airwell Chiller too hot?
- G
  Gary TurnerSep 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
Adrienne JensenNov 13, 2025
What to do if one or both Airwell Itelco-Clima CLC 402 ELN Chiller compressors are not working?
- E
  emilyreynoldsNov 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

Foreword and Introduction

Unit Introduction

Overview of unit capabilities and intended use for air-conditioning systems.

Warranty Conditions

Details on warranty validity, required service, and voiding conditions.

Emergency and Normal Stop Procedures

Instructions for initiating emergency and normal shutdown sequences.

Manual Conventions and Safety Information

Explains symbols, warnings, and general manual usage guidelines.

Safety and Precautions

Safety Compliance and Regulations

Requirements for compliance with EU directives and national standards for safe operation.

Key Personnel Definitions

Defines the roles and responsibilities of OWNER and INSTALLER.

Unit Access and Safety Zones

Guidelines for safe access to the unit, including required safety distances.

General Operational Safety

Essential safety measures for operators and installers during unit use.

Residual Risk Management

Precautions against specific risks: control system, mechanical, and electrical hazards.

Maintenance Safety Procedures

Safety protocols to follow before and during maintenance activities.

Safety Label Identification

Identifies the location and meaning of safety labels affixed to the unit.

Refrigerant and Oil Safety Data

Detailed safety information regarding refrigerant toxicity, handling, and oil properties.

Transport, Lifting, and Positioning

Delivery Inspection Procedures

Steps for checking the unit for damage upon delivery.

Safe Lifting Guidelines

Instructions on how to correctly and safely lift the unit using appropriate equipment.

Unit Anchoring Requirements

Guidelines for securing the unit to foundations, especially in earthquake zones.

Storage and Handling Precautions

Recommendations for storing the unit before installation to prevent damage.

Unit Installation

Unit Placement and Site Selection

Criteria for choosing an installation location, considering wind and noise.

Vibration Isolation Installation

Procedure for installing anti-vibration supports to minimize noise and vibration.

Hydraulic System Requirements

Specifications for the external water circuit, pump, and expansion vessel.

Hydraulic Circuit Connections

How to connect the unit's hydraulic system, including flow meter installation.

Defrosting Water Drainage (Heat Pump)

Specific instructions for heat pump units regarding defrosting water discharge.

Electrical Power Supply Specifications

Requirements for the unit's main electrical power connection.

Wiring and Electrical Connections

Detailed steps for making electrical connections to the unit.

Unit Start-Up Procedures

Pre-Start-Up Checks

Essential checks before initiating the unit's first operation.

Initial Start-Up Sequence

Step-by-step guide for the first operation of the unit.

Post Start-Up Performance Verification

How to check and verify the unit's operation after start-up.

Customer Handover and Training

Guidance on training the end-user on unit operation.

Control System Operation

Control System Overview

General description of the electronic control and panel terminal.

Temperature, Antifreeze, and Defrosting

Details on temperature regulation, antifreeze, and defrosting functions.

Control Panel Display and LEDs

Explanation of the unit's display indicators and LED functions.

Control Panel Start-Up Operation

How to start and operate the unit using the control panel buttons.

Mode Switching Procedures

Steps to change the unit's operating mode (cooling/heating).

Major Unit Alarms and Resets

List of primary alarms, their causes, and reset procedures.

General Unit Description

Unit Series Introduction

Overview of CLS/CLH unit types and applications.

Unit Construction and Specifications

Details on materials, assembly, and general build quality.

Compressor Details

Description of the hermetic scroll compressors used in the units.

Refrigeration Circuit Components

Explanation of refrigeration circuit elements and safety devices.

Water Heat Exchanger Specifications

Technical details of the stainless steel plate type evaporators.

Air Heat Exchanger Description

Information on the copper pipe and aluminum fin condenser coils.

Fan Specifications

Details on the axial fans, including blades and guards.

Control Compartment Details

Description of the electronic card, keyboard, and display system.

Optional Accessories List

Information on available accessories that can be mounted on-site.

Technical Data and Specifications

Evaporator Pressure Drop Data

Tables detailing pressure drops in the evaporator for various models.

Unit Technical Specifications

Comprehensive technical data including electrical, mechanical, and physical parameters.

Electrical Data: Compressors and Fans

Detailed electrical data for compressors, pumps, and fans across models.

Support Load Distribution

Tables specifying support positions and weight distribution for different units.

Overall Unit Dimensions

Drawings and tables showing the physical dimensions (A, B, C) of the units.

Installation Service Space Requirements

Diagrams and table defining minimum clearances needed for installation and maintenance.

Unit Maintenance Procedures

General Maintenance Requirements

Guidelines for regular maintenance and service by authorized personnel.

Planned Maintenance Schedule

Table outlining daily, weekly, and monthly maintenance checks.

Refrigerant Handling and Charging

Procedures for charging and handling refrigerant, including safety warnings.

Compressor Maintenance and Replacement

Information on compressor lubrication and replacement procedures.

Condenser Coil Cleaning and Care

Instructions for cleaning and maintaining the condenser coils.

Fan Inspection and Rotation Check

Checks to perform on the condenser fans, including rotation direction.

Dehydrating Filter Maintenance

How to check for filter clogging and service it.

Sight Glass Inspection and Humidity Check

Using the sight glass to monitor refrigerant flow and humidity.

Thermostatic Expansion Valve Adjustment

Procedure for checking and adjusting the thermostatic expansion valve.

Evaporator Cleaning and Efficiency Check

Maintaining the water side of the evaporator for optimal heat exchange.

Troubleshooting Guide

Spare Parts and Diagrams

Recommended Spare Parts List

List of common spare parts recommended for the first two years of operation.

Compressor Oil Information

Details regarding the polyester oil used for compressor lubrication.

Wiring Diagram Location

Information on where wiring diagrams are located and how to request them.

Dismantling and Scrapping Procedures

General Dismantling and Disposal

Procedures for safely draining, dismantling, and disposing of unit components.