Basic Unit Controls, Instruments and Protection Devices

The MP4000 is an advanced microprocessor controller. It has been specially developed for the control and monitoring of refrigeration units. The controller contains the following basic features:

• Temperature/Message Status Display

  • Temperature area: Displays return air sensor, supply air sensor, and setpoint.

  • Message area: Displays alarms, message, and controller menu.

• Keypad

  • F1 - F4 Function keys navigate within the Status Display.

  • Two Status LED indicators.

  • Special function keys: ON/OFF, PTI, Defrost.

Every Controller has a Back-up Battery. This will allow the controller to be energized if the unit is not connected to shore power. The technician can change settings in the controller - Setpoint, etc.

Press the ON/OFF key, the controller will energize and stay energized for 25 sec, by pressing any of the Menu keys the 25 sec timer will reset to 20 sec.