System Controller Lite UTY-ALGXZ1


Max. number of controllable systems :
1 VRF network system
Max. number of controllable units :
100 outdoor units,400 indoor units
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System Controller Lite offers a set of standard functions to manage air conditioners operating in a small or medium-size building.

  • Up to 400 indoor units and 100 outdoor units on a VRF network system can be controlled.
  • In addition to precise air conditioning control, a variety of applications are available as an option to offer a wider range of control.
  • Supports 7 languages: Chinese, English, French, German, Polish, Russian, and Spanish.

Visually intuitive operation

Click & Operate

A visual representation of the property is shown on the screen from the perspective most suitable for operation (Click & Operate). You can select from among 4 display options: site, building, floor, and list.

Define groups for batch control

Indoor units can be grouped for simplified batch control from the tree menu. They can be grouped by organizational hierarchy, such as by division, department, and section.

* 2D floor layout or 3D perspective of a building is not available on System Controller Lite.

Third-party devices connected via MODBUS® can be controlled.

Standard on
System Controller
Optional for
System Controller Lite UTY-PLGXX2

When a MODBUS® adapter (sold separately) is connected to a PC, electrical equipment and devices supported by MODBUS® can be monitored and controlled centrally from the PC. The central control can reduce wasted energy in an entire building, resulting from failure to turn equipment off during or after work, as well as reduce the need for on-site patrol.

Wide-ranging operation and data management

Standard on
System Controller and System Controller Lite

Schedule management

  • An annual schedule can be arranged for each remote controller group or user defined group.
  • On/off, operation mode, local control prohibition, and temperature settings can be programmed for up to 143 times per day at 10-minute intervals and for up to 101 configurations for each remote controller group.
  • Settings can be programmed for a period that spans midnight.
  • Allows for the programming of special settings for holidays for a whole year.
  • Low noise operation of outdoor units can be scheduled.

Wide-ranging control of indoor and outdoor units

  • The operation status and mode of each indoor unit are displayed.
  • Turn on and off each indoor unit and switch its operation mode.
  • Setting temperature range limitation
  • Low noise setting of outdoor units

Local control prohibition

Prohibits the operation mode, temperature setting, or on/off of an indoor unit from being changed locally.

Error alert and e-mail notice

When something goes wrong, an error message is shown in a popup on a computer display with a chime, and an e-mail notice is sent. Errors of the past 365 days are logged and can be reviewed.

Operation and control log

A log of operation status and control can be maintained and retrieved.

Importing and exporting databases

Only an administrator is authorized to import and export registration, layout, and image data.

Automatic clock adjustment

Time can be set for all controllers in batch automatically.

Electricity charge apportionment

Standard on
System Controller
Optional for
System Controller Lite UTY-PLGXA2

Electricity charge apportionment method

This is a method to calculate monthly energy costs to be allocated to each tenant based on the amount of energy used by their air conditioners. The first step is to determine exactly how much energy is consumed by air conditioners in each tenant space. The second step is to divide the total energy charge billed by an electric power company based on the amount of energy used by each tenant to determine the energy cost to be allocated to each of them. (See the figure to the right) The calculation takes into consideration such factors as the number of unused rooms and nighttime electricity rate, which are shown in detail on the energy cost allocation schedule.

Example of system configuration

1. Calculate the amount of energy used by each indoor unit

2. Calculate the amount of energy distributed to each indoor unit by an outdoor unit

3. Combine the amount of energy used by each indoor unit and the amount of energy distributed to them by the outdoor unit to obtain the total amount of energy used.

4. Calculate energy cost to be charged to each tenant

Calculate energy cost to be allocated to each tenant by dividing the total energy cost by the ratio of their energy use against the total usage.

Remote management

Standard on
System Controller
Optional for
System Controller Lite UTY-PLGXR2

System Controller can be used on site or remotely over networks for remote central control.

System Controller requires 2 software programs working together: VRF Controller runs on site and communicates with a VRF system;

VRF Explorer, which runs at a remote location, provides a user interface and communicates with VRF Controller.

VRF Controller and VRF Explorer run on a single PC or on different PCs connected on a network.

A PC running VRF Explorer can centrally control up to 10 VRF system sites having up to 20 buildings each.

On-site central control

Remote central control

Energy-saving management

Optional for
System Controller UTY-PEGXZ1
Optional for
System Controller Lite UTY-PLGXE2

A variety of energy-saving options can be selected depending on the season, weather, and the time of day. Excellent energy-saving operation is performed while keeping occupants comfortable.

Energy-saving performance data: This chart compares the energy consumption for the current month with the previous month and with the same month of the previous year to keep track of the energy-saving performance.

Indoor unit rotation

Indoor units can be automatically rotated to operate within a group in accordance with a predetermined annual schedule to reduce power consumption while keeping occupants comfortable. The operation stoppage rate can be selected for an indoor unit.

Peak cut operation

A power meter that monitors the total power consumption changes the set temperature for indoor units, turns their thermostat off, and takes other steps to control energy use while keeping occupants comfortable and maintaining the target power usage set for each time segment. Indoor units to be controlled can be grouped in any way, and the control level can be set for each group.

Capacity saving for outdoor unit

The upper limit on the capacity of an outdoor unit can be adjusted to reduce power consumption during a hot summer or cold winter by averaging out the power-saving performance of each refrigerant system. The upper limit on capacity can be set at 50% of the rated capacity or more.