Heatcraft Refrigeration Products H-IM-79E User Manual

The Beacon II board is lockable to prevent programmed 
setting changes by unauthorized personnel. When 
locked, the program setpoints cannot be changed.
To 

lock the setting:

 

• 

Press “

PROGRAM REVIEW” button.

 

• 

Press and 

hold “MONITOR” button.

 

• 

While holding “MONITOR” button, 

 

 

press “

ENTER” button.

 

• 

The LCD will display 

Loc.

This will prevent unauthorized personnel program 
changes. To 

unlock, repeat steps above. LCD will 

display “

UnL”.

•  OFF 

Box Temp

/ oFF  Box Temperature/ Mode is displayed

 

  All Evaporators 

 

 

 

  Single Evaporator-   Box Temp

/Coo  Box Temperature/ Mode is displayed

 

  Multiple Evaporators   

 

 

     Master Evap

-

Box Temp

/ Coo  Box Temperature/ Mode is displayed

 

     Slave Evaps - 

Coo  

Operating Mode is displayed

 

  All Evaporators 

 

  All Evaporators 

 

 

  All Evaporators 

 

  All Evaporators 

•  ALARMS  

A 1 

 

High Box Temp

A 2 

 

Low Box temp

 System Start-up failure

 

   

 

 

 

Compressor pumps down and tries  

 

   

 

 

 

to restart after 4 minutes.

A 4 

 

Input Fault

 

   

 

 

 

Box Temp., Suction Temp., Pressure

 

   

 

 

 

Transducer open or not installed

A RED, three-digit , alphanumeric LED on the 

Beacon II board  indicates status, alarms and  

error codes. 

Use this button to 

Pressing this button ONCE

will return the LED display to 

the default display. With the system in the 

OFF mode, 

pressing and holding this button will start the 

“TEST” 

mode. In the “

TEST” mode it will cycle through each 

output for 10 seconds. The display will only show “tst” 
during “

TEST” mode. Test mode will automatically 

terminate after 3 sequences.