Review of Hiref precision air conditioners: error codes, comparison of cabinet models

The Italian company Hiref is a leading manufacturer of precision equipment. These climatic systems are designed to maintain the required temperature level around the clock in server rooms and similar rooms. A properly selected Hiref cabinet air conditioner will ensure the normal operation of high-precision equipment and is able to automatically change parameters depending on external factors.

Main lines of air conditioners and products

The peculiarity of the design and production of such climatic equipment lies in the accurate calculation of the system components, maximum automation of work and simple maintenance. To meet these challenges, the company has developed several product lines in which each precision air conditioner meets specific requirements.

Overview of climatic equipment for server and telecommunication rooms by models:

• NRG... Features - the presence of an inverter unit, the use of R-410A refrigerant. The first improves performance, the second does not harm people and the environment. Power - from 3.2 to 89.3 kW.
• TREFF... These models are designed to serve large spaces. Option with external condenser is possible. For some installations, double cooling is used to maximize the desired room temperature. Power ranges from 22.1 to 236.1 kW.
• JREF... Water from the central water supply can be used as a cooler. Supplied with filter drier. The cabinet-type cooling unit is relatively small. It is possible to use it as an inter-row, to optimize the space in the room. Power - from 5.9 to 22.2 kW.
• HRC... Designed for cooling systems with high energy density. There is a point impact mode, accessibility to all units of the unit for further maintenance. The manual is understandable for users, does not require special knowledge or skills. Power - from 3 to 44.7 kW.
• HTW / HTWD... It is a monoblock unit designed for outdoor installation. The most common version is with air supply upwards. A bottom flow is possible if the distance between the supply and recirculated air sources is at least 1.7 m. Power - from 4.5 to 29.1 kW.
• HTS... This is a split system consisting of two blocks - outdoor and indoor. To improve performance, in addition to the compressor of the outdoor unit, the system is equipped with an evaporator located in the indoor unit. Advantages - adjustable louvers for air flow distribution, ducted design. Power - from 2.7 to 37.9 kW.

In addition to complete HVAC equipment, the company manufactures built-in coolers that can be integrated into other systems. It is important that the air conditioner is installed according to the instructions, the operating rules are followed.

Many models have the function of connecting a GSM modem for remote control and receiving SMS notifications about the current state of the system.

Comparison of characteristics of popular models

Such climatic systems are selected after careful engineering calculations - the required air conditioning characteristics and operating modes are determined. An important factor is the design features, dimensions and weight.

It is important to define the basic requirements that a particular Hiref model will meet.A precision air conditioner is selected according to the following parameters:

• Air supply - top or bottom. For some series, it is possible to change this option, but only if certain conditions are met.
• Operating modes - cooling, humidification, heating.
• The maximum and minimum permissible level of the outdoor temperature. Usually this parameter varies from + 50 ° С to -30 ° С.
• Installation type - outdoor, indoor or combined.
• The number of heat exchangers and refrigerants.
• Assembly type - between rows, cabinet or hanging.

As an example, we can analyze the parameters of the most popular models.

The table shows approximate prices, as the cost may vary depending on the configuration. You can find out all the characteristics and possible delivery options on the manufacturer's official website.

Instructions for Hiref control panel and air conditioners

To control the system, you can use the remote control for the air conditioner supplied as standard. But this is not always user-friendly and therefore alternatives have been developed. In addition to the consoles, the company offers complex control and monitoring systems.

Overview of monitoring and control devices:

• 4.3 ”touch screen. Designed for connection to the control unit. It is characterized by a simple and intuitive interface, a graphical visualization of the current parameters has been developed.
• HiWeb. Works with all known internet browsers. Keeps a history of alarms, e-mailing can be configured for up to five users. It can be used to modify the current parameters. The maximum number of variable values ​​is up to 20 pcs.
• HiNet. More advanced monitoring service. There is a GPRS module with the ability to connect a SIM card. Simultaneous control of ten units of HVAC equipment. Automatic data transfer to the cloud server. Setting up personal control access.

The latest monitoring service will be the best option for large telecom companies or server centers.

To adapt to specific equipment, you will need not only instructions for air conditioners, but also the services of a specialized specialist. Otherwise, incorrect operation is possible.

Hiref air conditioner error codes

Since the company's climate systems are a complex complex, automatic programs have been developed to identify malfunctions and malfunctions. First of all, self-diagnostics. If, as a result of the check, a failure was detected, certain error codes appear on the information screen.

To avoid problems, you need to adhere to the following recommendations:

• perform correct installation according to the manufacturer's rules;
• carefully study the user manual before use;
• do all the maintenance activities specified in the manual;
• in case of any problems, inform the service center about it.

Due to the complexity of the equipment, it is categorically impossible to make independent repairs. Permissible actions are performed in agreement with the representatives of the manufacturer or their authorized dealers.

User reviews

Due to the specifics of climate systems, it is difficult to find consumer reviews. But based on information taken from specialized forums and similar resources, the following advantages can be distinguished:

• reliability of work:
• maximum automation;
• possibility of remote control.

The disadvantages include only the high cost of components.

In general, the climatic equipment of this manufacturer has established itself as reliable, with the ability to flexibly customize the system to the requirements of users.

In the video, you can familiarize yourself with the features of one of the company's models: