VRF Control & Controllers Systems

Managing a VRF system requires precise control to optimize comfort and energy efficiency. The sources detail various controller options, ranging from simple remote controls for individual areas to sophisticated central systems for managing large installations. These controllers offer different levels of capability regarding the number of units they can manage and the functions they support.

Below are the types of controllers outlined in the sources and their key features:

Remote Controllers

Remote controllers are typically used for localized control of indoor units or small groups.

Wired Remote Controllers

• Models: UTY-RNRYZ2, UTY-RLRY, UTY-RVNYM, UTY-RSNYM.
• Capacity: Each model can control 1 remote controller group and up to 16 indoor units.

Key Features:

• On/Off control.
• Fan speed setting.
• Room temperature setting.
• Display of Error status.
• Display of Defrosting status.
• Some models support Current time and Day of week display
  (UTY-RNRYZ2, UTY-RLRY, UTY-RVNYM).
• Some models support Room temperature display
  (UTY-RNRYZ2, UTY-RLRY, UTY-RVNYM).
• Some models support Multi language display
  (UTY-RNRYZ2, UTY-RLRY, UTY-RVNYM).
• Some models support Schedule timer with varying capacities. (8 times per day for UTY-RNRYZ2 and UTY-RVNYM, 4 times per day for UTY-RLRY) The period for the schedule timer is Week.
• Minimum unit for timer setting is 10 or 30 minutes depending on the model.
• Some models support Key lock as Child lock
  (UTY-RNRYZ2, UTY-RLRY, UTY-RVNYM).

Unsupported Features (Commonly for these models):

• Operation mode setting is not supported on all wired models.
• Room temp set point limitation is not supported.
• Test operation is not supported.
• Air direction setting (up/down, right/left).
• Individual louver control.
• Group setting.
• RC prohibition.
• Anti freeze setting.
• Set temp auto return.
• Economy mode setting.
• Human sensor control are not supported.
• Many display and timer features like R.C prohibition.
• Cooling/heating priority.
• Address display.
• Summer time.
• Name registration.
• Backlight.
• 2D/3D display.
• On/off timer.
• Sleep timer.
• Program timer.
• Auto off timer.
• Day off are not supported.
• Control system functions like Status monitoring.
• Error history.
• Emergency stop.
• Remote management.
• Energy saving management.
• E-mail notification are not supported. 
• Low noise mode is not supported.

Simple Remote Controllers

• Models: UTY-RSNYM, UTY-RSRY, UTY-RHRY. Note that UTY-RHRY is marked with an asterisk 1.
• Capacity: Each model can control 1 remote controller group and up to 16 indoor units.

Key Features:

• On/Off control.
• Fan speed setting.
• Room temperature setting.
• Display of Error status.
• Display of Defrosting status.

Unsupported Features:

Operation mode setting is not available for the UTY-RHRY model (1 note).

Generally, Room temp set point limitation, Test operation, Air direction setting (up/down, right/left), Individual louver control, Group setting, RC prohibition, Anti freeze setting, Set temp auto return, Economy mode setting, Human sensor control, most display features (Current time, Day of week, etc.), all timer functions, control system functions, Key lock, and Low noise mode are not supported.

Wireless Remote Controller

• Model: UTY-LNHY.
• Capacity: Can control 1 remote controller group and up to 16 indoor units.

Key Features:

• The source table indicates that the Wireless Remote Controller supports many basic functions similar to the Wired/Simple remotes but does not list them specifically in this section; the ('—')marks across the table rows suggest limited functionality compared to more advanced controllers.

Unsupported Features:

• Based on the table, most advanced display, timer, and control system functions are not supported.

Centralized Control Systems

For larger installations, central controllers and software provide comprehensive management capabilities.

Central Remote Controller (For 8 rooms Multi)

• Model: UTY-DMMYM.
• Capacity: Can control 1 central controller group and up to 8 indoor units. Note the limited unit capacity compared to other central controllers.

Key Features:

• Supports On/Off control.
• Operation mode setting.
• Fan speed setting.
• Room temp setting.
• Supports Error and Defrosting display.
• Supports basic timer functions.
• Supports Key lock.

Unsupported Features:

• Many advanced display, timer, and control system functions are not supported.

Group Remote Controller

• Model: UTY-CGGY.
• Capacity: Can control up to 8 central controller groups and up to 128 indoor units.

Key Features:

• Supports On/Off control.
• Operation mode setting.
• Fan speed setting.
• Room temp setting.
• Supports Error and Defrosting display.
  
• Supports basic timer functions.
  
• Supports Key lock.

Unsupported Features:

• Many advanced display, timer, and control system functions are not supported.

Central Remote Controller

• Model: UTY-DCGY.
  
• Capacity: Can control up to 100 central controller groups and up to 100 indoor units. Note the group capacity exceeds unit capacity.

Key Features:

• Supports On/Off control.
• Operation mode setting.
• Fan speed setting.
• Room temp setting.
• Supports Display of Error.
• Defrosting.
• R.C. prohibition.
• Cooling/heating priority.
• Address display, Room temp.
  
• Supports Key lock.
  
• Supports Schedule timer (Period: Week, 4 times per day).
  
• Minimum unit of timer setting is 5 minutes..
  
• Supports Error history.

Unsupported Features:

• Test operation.
• Air direction settings.
• Individual louver control.
• Group setting.
• RC prohibition.
• Anti freeze setting.
• Set temp auto return.
• Economy mode.
• Human sensor control.

Many display features

• Current time.
• Day of week.
• Multi language.
• Summer time.
• Name registration.
• Backlight.
• 2D/3D display.

Many timer functions

• On/off timer.
• Sleep timer.
• Program timer.
• Auto off timer.
• Day off.
• control system functions Status monitoring.
• Electricity charge apportionment.
• Emergency stop.
• Remote management.
• Energy saving management.
• E-mail notification.
• Low noise mode are not supported.

Touch Panel Controller

• Model: UTY-DTGYZ1.
• Capacity: Can control up to 400 central controller groups and up to 400 indoor units.

Key Features:

• Supports On/Off control.
• Operation mode setting.
• Fan speed setting.
• Room temp setting.
• Supports Room temp set point limitation.
• Supports Test operation.
• Supports RC prohibition.
• Supports Anti freeze setting.
• Supports Set temp auto return.
• Supports Economy mode setting.
• Supports Human sensor control.
• Supports Display of Error.
• Defrosting.
• Current time.
• Day of week.
• R.C. prohibition.
• Cooling/heating priority.
• Address display.
• Room temp.
• Multi language.
• Summer time.
• Supports Name registration.
• Supports Backlight.
• Supports Schedule timer (Period: Week, 20 times per day).
• Minimum unit of timer setting is 10 minutes.
• Supports On/off timer.
• Sleep timer.
• Program timer.
• Auto off timer.
• Day off.
• Supports Status monitoring system.
• Electricity charge apportionment.
• Error history.
• Emergency stop.
• Remote management.
• Energy saving management.
• E-mail notification for malfunction.
• Supports Key lock with Password setting.

Unsupported Features:

• Air direction settings.
• Individual louver control.
• Group setting.
• 2D/3D building display.
• Low noise mode are not supported.

Note 2 indicates some functions may only be available via external input control.

System Controller Software

Software solutions offer the highest capacity and most comprehensive feature sets for large-scale management.

System Controller Lite Software

• Model: UTY-ALGXZ1.
• Capacity: Can control up to 400 central controller groups and up to 400 indoor units.

Key Features:

• Supports On/Off control.
• Operation mode setting.
• Fan speed setting.
• Room temp setting.
• Supports Room temp set point limitation.
• Supports Test operation.
• Supports RC prohibition.
• Supports Anti freeze setting.
• Supports Set temp auto return.
• Supports Economy mode setting.
• Supports Human sensor control.
• Supports Display of Error.
• Defrosting.
• Current time.
• Day of week.
• R.C. prohibition.
• Cooling/heating priority.
• Address display.
• Room temp.
• Multi language.
• Summer time.
• Supports Name registration.
• Supports Backlight.
• Supports Schedule timer (Period: Year, 144 times per day).
• Minimum unit of timer setting is 10 minutes.
• Supports On/off timer.
•  Sleep timer.
• Program timer.
• Auto off timer.
• Day off.
• Supports Status monitoring system.
• Electricity charge apportionment.
• Error history.
• Emergency stop.
• Remote management.
• Energy saving management.
• E-mail notification for malfunction.
• Supports Key lock with Password setting.
• Supports Low noise mode.

Unsupported Features:

• Air direction settings.
• Individual louver control.
• Group setting.
• 2D/3D building display are not supported.

Note 2 indicates some functions may only be available via external input control.

System Controller Software

• Model: UTY-APGXZ1
• Capacity: Can control up to 1600 central controller groups and up to 1600 indoor units. This is the highest capacity controller listed

Key Features:

• Supports On/Off control.
• Operation mode setting.
• Fan speed setting.
• Room temp setting.
• Supports Room temp set point limitation.
• Supports Test operation.
• Supports RC prohibition.
• Supports Anti freeze setting.
• Supports Set temp auto return.
• Supports Economy mode setting.
• Supports Human sensor control.
• Supports Display of Error.
• Defrosting.
• Current time.
• Day of week.
• R.C. prohibition.
• Cooling/heating priority.
• Address display.
• Room temp.
• Multi language.
• Summer time.
• Supports Name registration.
• Supports Backlight.
• Supports Schedule timer (Period: Year, 144 times per day).
• Minimum unit of timer setting is 10 minutes.
• Supports On/off timer.
• Sleep timer.
• Program timer.
• Auto off timer.
• Day off.
• Supports Status monitoring system.
• Electricity charge apportionment.
• Error history.
• Emergency stop.
• Remote management.
• Energy saving management.
• E-mail notification for malfunction.
• Supports Key lock with Password setting.
• Supports Low noise mode.

Unsupported Features:

• Air direction settings.
• Individual louver control.
• Group setting.
• 2D/3D building display are not supported.