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GREENHECK 485931 Microprocessor Controller

GREENHECK 485931 Microprocessor Controller-fig1

Microprocessor Controller

This quick start document is intended to help with getting the initial unit startup completed, but does not replace the IOM. Please read the IOM for all safety information and precautions before performing any work on the equipment.

Keypad Description
GREENHECK 485931 Microprocessor Controller-fig3 Alarm Button will blink red, indicating an alarm condition. Press to review current alarms. To review previous alarms, access the Alarm Menu.
GREENHECK 485931 Microprocessor Controller-fig4 Down Arrow  

The arrow keys allow the user to scroll through different screens and adjust parameters.

GREENHECK 485931 Microprocessor Controller-fig5 Up Arrow
 

 

GREENHECK 485931 Microprocessor Controller-fig6

 

 

Enter

A.    In screens with adjustable parameters, pressing the Enter key moves the cursor from the upper left corner of the screen to the parameter. The arrow keys can then be used to adjust the parameter.

B.    To move to the next parameter on the same screen, press the Enter button.

C.   To save the change, press the Enter button until the cursor moves back to the upper left corner of the screen.

GREENHECK 485931 Microprocessor Controller-fig7 Escape Allows the user to exit the current menu, jumping to the Main Menu.
GREENHECK 485931 Microprocessor Controller-fig8 Program Pressing the Prg (Program) button allows the user to enter the Main Program Menu.
  • MAIN SCREEN: The main screen will display the current supply temperature, outside air temperature, space temperature (if equipped), temperature setpoint and symbols to indicate operation. In addition the unit status line will provide the current mode of operation.
  • MENU NAVIGATION: The controller will revert to the main screen after several minutes of inactivity. Pressing the UP or DOWN arrow key from the main screen will cycle the display through the Unit Status Menu. Pressing the Program key allows the user to enter the Main Program menu. The Main Program Menu consists of several menus to help guide users with altering program parameters.
  • UNIT START COMMAND: The unit ships from the factory in a disabled state. To allow the unit to operate, the controller must receive a run command. Jumper unit terminals R – G to allow the unit to operate. The unite can then be enabled manually in the unit enable menu.
    • BMS – Command the unit enable/disable point to control through BMS.
    • Scheduler – To use the integral time clock, configure the schedule through the occupancy menu.
  • SET POINTS: To view or adjust set points and lockouts, go to the Set point menu.
  • BMS Configuration: To configure BACnet or Modbus settings, login using the service password (found in the IOM) by navigating to Ctrl Variables > Advanced Login. Settings such as address, baud rate, etc can then be configured in the Network Settings menu.
  • UNIT TESTING: To manually override the units control loops and I/O, go to the Ctrl Variables>Advanced menu and login with the service password found in the controller IOM. Once logged in the manual overrides menu will be available in the Ctrl Variables>Advanced menu.

    GREENHECK 485931 Microprocessor Controller-fig9

    Main Menu Layout
    Unit Enable
    Unit Status
    Ctrl Variables
    Temp Control
    Heat & Vent*
    Refrigeration
    Evap Cooling*
    Damper Control
    Fan Control
    Occupancy
    Advanced
    Login
    Manual Overrides**
    Adv. Setpoints
    PID Tuning
    Network Settings
    Backup/Restore**
    IO Status/Offset
    IO Config
    Unit Config
    Unit Settings
    Service Info
    Alarm Management

    *Only available when unit is configured with these options **Only available when logged in with the service password

Microprocessor Controller Quick Start Guide, Rev. 2, August 2022

GREENHECK 485931 Microprocessor Controller-fig2

Documents / Resources

GREENHECK 485931 Microprocessor Controller [pdf] User Guide
485931 Microprocessor Controller, 485931, Microprocessor Controller, Controller

References

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