AIRSTAGE Technical Reference

Peak Cut Power Consumption Function

VRF energy demand management and power consumption limitation
For Fujitsu General VRF systems using the Peak Cut function
The Peak Cut Power Consumption Function is designed to optimise energy use during periods of high demand. It limits VRF system power consumption to a preset threshold, helping manage peak electrical demand and reduce the risk of peak demand charges.

1. Key features

FeatureDescription
Power consumption limitationAllows the VRF system's power consumption to be capped at selected levels from 40% to 100% of maximum capacity.
Customisable settingsSelectable power-saving levels can be matched to the operational needs of the facility.
Manual or automatic activationThe function can be triggered manually or integrated with an external system for automated control.
Peak-hour energy managementLimits system power during peak periods to help manage electricity demand charges.

2. Typical use cases

Mega shopping malls
Reduce power consumption during peak shopping hours while maintaining building comfort.
Factories
Manage HVAC energy use during high-demand production schedules.
Glass-panelled buildings
Control cooling loads in areas subject to high temperature fluctuations.

3. Setting up the Peak Cut function

  1. Install the necessary hardware.
    Ensure the outdoor unit PCB is equipped with the external connection kit, for example UTY-XWZXZ6.
  2. Access the function settings.
    Use the remote controller or centralised control panel to navigate to the function setup menu.
  3. Set the peak power limit.
    Locate Function No. 03 and configure the required power-saving level.
  4. Activate the function.
    Enable the Peak Cut function from the settings menu. Where required, link it to an external control system for automated peak-hour activation.

4. Peak Cut power levels

Function No.Power limitNotes
0340%Maximum power-saving level listed.
60%Intermediate power limit.
80%Reduced peak consumption with greater available capacity.
100%Default. Full available capacity.
Comfort consideration: Lower Peak Cut settings reduce the power available to the system. If heating or cooling performance is insufficient, review the selected capacity limit against the building load requirements.

5. Troubleshooting

IssueChecks / actions
Peak Cut function not activating
  • Verify that the Function No. and Setting No. have been correctly configured.
  • Check wiring connections and confirm the external input system is operational.
Insufficient cooling or heating
  • Confirm that the selected power-saving level is appropriate for the building requirements.
  • Increase the capacity setting if comfort levels are compromised.
System exceeds the intended power limit
  • Check that the Peak Cut function is activated and correctly linked to the external control system.
  • Inspect the DIP switch settings on the outdoor unit PCB.

6. Reference image

Peak Cut Power Consumption Function reference image