HL HL-i Series User Manual (English)

Questions and Answers:

Y
yfrankAug 14, 2025
What to do if the HL HL-i Chiller compressor doesn't start because of max pressure switch?
- S
  sydney53Aug 15, 2025
  If your HL Chiller's compressor isn't starting and the max pressure switch has been activated (HP1 or HP2 alarm), there could be several reasons: * The pressure switch might be faulty and needs checking or replacement. * There might be excessive refrigerant charge, requiring you to recover the excessive gas. * The air condenser could be clogged, needing cleaning with compressed air or a water jet. * The ambient air temperature could be too high. Try reducing the ambient temperature within the design limits, perhaps by increasing local ventilation.
D
Drew RamirezAug 18, 2025
How to troubleshoot HL HL-i Chiller that doesn't start?
- J
  James KnappAug 18, 2025
  If your HL Chiller unit doesn't start up, consider the following: * Check the voltage and ensure all contacts are properly closed, as there may be a defective connection or open contacts. * The compressor delay timer might be active; wait for the set delay time to pass. * There may be wrong parameter settings; try resetting the unit.
M
Michael LarsonAug 21, 2025
What to do if HL HL-i compressor doesn't start due to min pressure switch?
- G
  Gloria HarrisAug 21, 2025
  If the HL Chiller compressor doesn't start because the min pressure switch has been actuated, it could be due to several reasons: * The pressure switch may be out of order, requiring a check and replacement. * There might be a lack of refrigerant, in which case you should call a qualified refrigeration engineer to check for leaks and replenish refrigerant. * The water outlet sensor probe might be set too low, causing the water to freeze. Raise the set value or change the LP Switch. * The freon filter may be clogged; check and replace it.
T
Tammy LucasAug 25, 2025
Why does my HL HL-i run constantly and never stop?
- A
  anthony91Aug 26, 2025
  If the HL Chiller unit works and never stops, consider these potential causes: * There might be a lack of refrigerant, so call a qualified refrigeration engineer to check for leaks and replenish refrigerant. * There could be an excessive thermal load; try reducing it. * The compressor cooling capacity might not be as high as expected; check, replace, or reset the compressor.
B
Brooke BradleyAug 28, 2025
How to fix HL HL-i compressor that won't start?
- J
  jonathan89Aug 28, 2025
  If the HL Chiller compressor doesn't start, here are a few things to check: * The compressor might be burned or seized, requiring a replacement. * The compressor remote control switch might be de-energized; check the voltage at the compressor coil's ends and check for coil continuity. * The power circuit could be open; try to find out why the protection is activated and close the compressor's circuit. * The compressor’s thermal overload circuit breaker may have tripped; reset it.
B
Brenda JordanAug 31, 2025
What causes HL Chiller pump not to start?
- S
  Sean GallowayAug 31, 2025
  If the HL Chiller pump doesn't start, here's what you can check: * The pump's thermal overload circuit breaker may have tripped; try resetting it. * The pump might be burned; check or replace it. * There might be no water inside the circuit; check the hydraulic system for leaks, if any, and refill.
T
Tony MaySep 3, 2025
Why HL HL-i fans don't start?
- M
  Matthew FlemingSep 3, 2025
  If the HL Chiller fans don’t start, here are a few things to consider: * The fans might be burned or seized, requiring replacement. * The pressure sensors could be damaged; replace them. * The fans’ thermal overload circuit breaker may have tripped; reset it.
E
Erika GomezSep 7, 2025
What to do if HL Chiller compressor starts and stops repeatedly?
- R
  Robin AdamsSep 7, 2025
  If the HL Chiller compressor starts and stops repeatedly, it might be because the control temperature return difference setting is too small. Try raising the return difference setting (“r02” parameter).
C
churchsherriSep 10, 2025
What causes no signal from water differential pressure switch in HL HL-i Chiller?
- M
  michaelcarrSep 12, 2025
  If the signal of the water differential pressure switch is not present in your HL Chiller, consider the following: * The pump might be set for low speed; increase the speed through the variator on the pump. * The water capacity of the system might be limited; check pressure drops in the system. * A shut-off valve of the water circuit might be closed; open the closed valve.

HL HL-i Series Specifications

General

Brand	HL
Model	HL-i Series
Category	Chiller
Language	English

Summary

Safety Information

Safety Marks and Symbols

Explains symbols for general, electrical, and attention warnings.

Risks of Non-Compliance

Details consequences of ignoring safety, including injury and warranty voidance.

Active and Passive Safety Features

Covers microprocessor control and physical enclosures for user protection.

EC Declaration of Conformity

General Unit Information

HL-i Series Overview

Details the range of sizes and cooling capacities for HL-i chillers.

Standard Unit Features

Lists key components like microprocessor, tanks, fins, and fans.

Model Identification Guide

Explains how to identify models and their cooling capacities.

Operating Condition Parameters

Specifies allowed ambient and water temperature ranges for operation.

Understanding General Symbols

Interprets common symbols used for connections, flow, and risks.

Transportation and Installation

Package Inspection and Handling

Guidelines for inspecting packages upon delivery and safe handling.

Unit Positioning and Access

Factors for selecting a suitable installation location and ensuring service access.

Hydraulic Connection Best Practices

Recommendations for connecting hydraulic lines and system components.

Electrical Connections and Working Limits

Electrical Connection Requirements

Specifies power supply checks, cable sizing, and protection measures.

Operational Working Limits

Defines temperature jump limits and flow rate considerations for safe operation.

Cool Water Temperature Guidelines

Recommends temperatures and glycol use for chilled water operation.

External Air Temperature and Maintenance

External Air Temperature Range

Specifies the acceptable external air temperature for optimal cooling performance.

Routine Maintenance Schedule

Outlines monthly checks for electrical, water, and component condition.

Cooling Circuit Maintenance Procedures

Details steps for refrigerant handling, leak testing, and charging.

Cooling Circuit Maintenance Procedures

Circuit Preparation and Testing

Covers tightness tests, draining, drying, and vacuuming the cooling circuit.

Refrigerant Charging and Temperature Checks

Details the correct procedure for adding refrigerant and verifying temperatures.

Unit Dismantling and Oil Disposal

Provides guidance on safely dismantling the unit and disposing of compressor oil.

Emergency Procedures and Components

Flood and Fire Response Actions

Steps to take in case of floods or fires involving the unit.

Structural and Enclosure Components

Information on panels, frames, and protective guards.

Key Operational Components

Overview of compressor, condenser fins, water tank, and axial fans.

CAREL Controller Interface

Controller Display and Information

Explains the 3-digit display, its range, and operating values.

Initial Unit Start-Up Sequence

Step-by-step guide for powering on the unit via the SW0 switch.

CAREL Controller Modes and Operations

Activating Standby Mode

Instructions for putting the unit into standby using the fan button.

Unit Shutdown Procedure

Steps to safely turn off the unit using the SW0 switch.

Adjusting Water Outlet Cooling Set Point

Guide to changing the target water outlet temperature (r01).

CAREL Controller Parameter Settings

Setting Water Outlet Differential Point

Procedure to modify the differential set point (r02) for water outlet.

Setting Antifreeze Alarm Point

Procedure to adjust the antifreeze alarm set point (A01).

Troubleshooting Unit Start-Up and Operation

Unit and Compressor Start Issues

Addresses problems preventing the unit or compressor from starting.

Compressor Cycling and Pressure Alarms

Explains causes for repeated compressor stops or pressure-related shutdowns.

Troubleshooting Component and System Faults

Fan, Pump, and Operation Anomalies

Diagnoses issues with fans, pumps, and continuous unit operation.

Pressure Switch Signal Issues

Addresses problems related to the water differential pressure switch signal.

Alarm and Error Code Reference

Control Panel Error Code Display

Lists error codes shown on the unit's front panel.

Detailed Alarm Table and Key

Provides a comprehensive list of alarms with their causes and actions.

HL HL-i Series User Manual

Table of Contents

Questions and Answers:

HL HL-i Series Specifications

Summary

Safety Information

Safety Marks and Symbols

Risks of Non-Compliance

Active and Passive Safety Features

EC Declaration of Conformity

General Unit Information

HL-i Series Overview

Standard Unit Features

Model Identification Guide

Operating Condition Parameters

Understanding General Symbols

Transportation and Installation

Package Inspection and Handling

Unit Positioning and Access

Hydraulic Connection Best Practices

Electrical Connections and Working Limits

Electrical Connection Requirements

Operational Working Limits

Cool Water Temperature Guidelines

External Air Temperature and Maintenance

External Air Temperature Range

Routine Maintenance Schedule

Cooling Circuit Maintenance Procedures

Cooling Circuit Maintenance Procedures

Circuit Preparation and Testing

Refrigerant Charging and Temperature Checks

Unit Dismantling and Oil Disposal

Emergency Procedures and Components

Flood and Fire Response Actions

Structural and Enclosure Components

Key Operational Components

CAREL Controller Interface

Controller Display and Information

Initial Unit Start-Up Sequence

CAREL Controller Modes and Operations

Activating Standby Mode

Unit Shutdown Procedure

Adjusting Water Outlet Cooling Set Point

CAREL Controller Parameter Settings

Setting Water Outlet Differential Point

Setting Antifreeze Alarm Point

Troubleshooting Unit Start-Up and Operation

Unit and Compressor Start Issues

Compressor Cycling and Pressure Alarms

Troubleshooting Component and System Faults

Fan, Pump, and Operation Anomalies

Pressure Switch Signal Issues

Alarm and Error Code Reference

Control Panel Error Code Display

Detailed Alarm Table and Key