Software Revision 1.5.0017


  • Added zone temperature to the main display
  • Optimized PID compressor speed control efficiency. Quick temperature drop will no longer shut off compressor immediately to avoid cycling.
  • Optimized condenser fan speed control. Condenser fan now targets a slightly higher design pressure.
  • Change default low pressure alarm setpoints to eliminate false alarms
    • Trigger threshold -> 60 psi
    • Startup delay -> 90s
    • Running delay -> 60s
    • Low outdoor temp delay ->120s
    • Lock threshold ->48psi  

           Important: if you are importing settings from older software, these parameters must to changed manually under HVAC config->Alarms

  • Disabled features now hidden on HTTP interface to avoid confusion
  • Changed HVAC "Indoor Temp" to "Return Temp" on HTTP interface for clarity
  • Added condenser dirty rate to HVAC status display
  • Corrected AC fan alarm reporting
  • SNMP Feature: controlling temperature can now be overwritten through SNMP  


Software Revision 1.5.0016

  • Parameter export no longer requires system shut off first. This streamlines the software update process. 
  • All connected HVAC system can now be reboot from the multi-unit controller. To reboot HVAC, go to Program->System->Initialization
  • Minor HTML display improvements


Software Revision 1.5.0015

  • Decreased compressor speed change to allow smoother capacity ramp up/down
  • Increased EEV position change speed to allow EEV to catch up with compressor quicker
  • Added option to toggle snow wiping function (periodically operate condenser fan if outdoor temperature is below freezing)
  • Longer idle reset time (When controller is left idle for 5 min, it will go back to main screen. This was previously 30sec)
  • Added longer delay for low pressure alarm to prevent false alarm caused by pressure fluctuation when compressor is changing speed.
  • Default unit of measurement has been changed to US Imperial. To change UOM, pressure up and down together.
  • Added system reboot function. To access system reboot, go to Program->System->Initialization
  • Fixed some typo and display issue on HTML page.


Software Revision 1.5.0013

  • Added free cooling status. It displays free cooling percentage during free cooling. When it is not free cooling, it displays reason why it is not free cooling (e.g. outdoor temperature high). 
  • Fixed bug with zone 2 temp sensor not reading correctly
  • Corrected zone control when multiple types of units are in the same zone
  • Added free cooling status. It displays free cooling percentage during free cooling. When it is not free cooling, it displays reason why it is not free cooling (e.g. outdoor temperature high). 
  • Optimized calculation of condenser dirty rate
  • Changed default alarm configuration for Air Filter Protection Device to Normally Closed.


Software Revision 1.5.0010

  • Added manual backup number. User can now manually set number of backup units instead of system determining automatically.
  • When temperature reaches lower temperature bound, compressor will run at minimum speed for 3 minutes before shutting off. This is minimize compressor cycling due to delay change in indoor temperature


Software Revision 1.5.008

  • Fixed issue where some parameter, such as return temp and outdoor humidity, are not tracked correctly in data log.
  • Optimized control sequence for backup unit. The backup unit is now a fixed number of units that will rotate to equalize run time.
  • Optimized variable speed compressor sequence control to allow smoother transitions and turn on/offs
  • Fixed EEV control sequence to allow better pressure equalization after compressor operation
  • Minor user interface improvements for remote monitoring


Software Revision 1.5.004

  • Initial Release