HiRef HTI-CW Series User Manual (English)

Questions and Answers:

W
woneillAug 1, 2025
How to troubleshoot a HiRef HTI-CW Air Conditioner that does not start?
- D
  David BeckerAug 1, 2025
  If your HiRef Air Conditioner unit isn't starting, several factors could be at play. First, ensure that power is being supplied to both the primary and auxiliary circuits. Then, check the fuses to see if the electronic card is receiving power. Alarms might be preventing the unit from starting, so check the microprocessor control panel for any signalled alarms, address the causes, and then restart the unit. Finally, a wrong phase sequence could be the issue; if so, invert two phases in the primary power line after disconnecting them upstream from the unit.
C
christopher88Aug 5, 2025
What to do if the compressor of my HiRef HTI-CW Air Conditioner does not start?
- J
  jillthomasAug 5, 2025
  If the compressor in your HiRef Air Conditioner isn't starting, the circuit breakers or line fuses might have been tripped by a short circuit. To resolve this, pinpoint the cause by measuring the resistance of the individual windings and the insulation from the casing before restoring power. Also, check if one of the HP or LP pressure switches has tripped and eliminate the causes using the microprocessor. Lastly, verify the phase sequence relay, as the phases might have been inverted in the distribution compartment.
E
ekaneAug 13, 2025
How to fix a noisy compressor in my HiRef HTI-CW Air Conditioner?
- J
  Janice GarciaAug 14, 2025
  If the compressor in your HiRef Air Conditioner is unusually noisy, it might be rotating in the wrong direction. To fix this, check the phase sequence relay. Then, invert the phases on the terminal board after disconnecting the unit and contact the manufacturer.
J
Jake RojasAug 17, 2025
What causes low evaporation pressure in a HiRef HTI-CW?
- J
  Jimmy CrossAug 17, 2025
  If you're experiencing low evaporation pressure in your HiRef Air Conditioner, it could be due to several reasons. A malfunctioning thermostatic valve might be the cause; try warming the bulb with your hand to see if the valve opens, and adjust it if necessary, replacing it if it doesn't respond. Additionally, a clogged filter dryer could be the issue; pressure drops upstream and downstream from the filter should not exceed 2°C, so replace the filter if they do. Low condensation temperature can also lead to this problem, so check the efficiency of the condensation control device, if present. Lastly, a low level of refrigerant might be the cause; check the refrigerant level by measuring the degree of Sub-cooling, and if it is below 2°C, replenish the charge.

HiRef HTI-CW Series Specifications

General

Brand	HiRef
Model	HTI-CW Series
Category	Air Conditioner
Language	English

Summary

General Description

1.1 Structure

Physical build of HTS units: galvanized steel base and panels with epoxy polyester coating.

1.2 Field of application

Defines the operating limits for HTS units; non-compliance invalidates warranty.

1.3 Cooling circuit

Describes the cooling circuit components and compliance with Directive 97/23 for manufacturing.

1.4 Hydraulic section

Details the three-way valve used for inlet water flow regulation in the HTI0105 version.

1.5 Installation warnings

Provides essential safety rules and precautions for unit installation and maintenance work.

Inspection / Transport

2.1 Inspection on receipt

Procedure for checking unit integrity upon delivery and reporting damages to the carrier and HiRef.

2.2 Lifting and transport

Guidelines for safe and careful handling during unit unloading and positioning to prevent damage.

2.3 Unpacking

Recommendations for careful packaging removal to avoid unit damage and for proper waste disposal.

Installation

3.1 HTI - Indoor unit positioning

Key aspects to consider when selecting the best site for indoor unit installation and connections.

3.2 Free-cooling duct connections (optional)

Details on the optional integrated free-cooling device and its specific duct connections.

Electrical Connections

4.1 Generalities

General precautions and requirements for electrical connections, including power supply and wiring.

4.2 Starting up for the first time

Step-by-step guide for performing the initial electrical connection and startup procedures.

4.3 Starting operation

Instructions on how to start the unit's operation after initial setup.

Operating Parameters Setting

5.1 Generalities

General notes on control devices and parameter settings, including password protection.

Maintenance

6.1 Warnings

Critical safety warnings for maintenance operations, emphasizing qualified personnel.

6.2 Periodical checks

Recommended routine maintenance and checks to ensure satisfactory performance over time.

Troubleshooting

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