Troubleshooting/Service 
176  UDC2500 Universal Digital Controller Product Manual  4/07 
11 
Contact your Honeywell Representative to place an order.  Please have a 
company purchase order number available before you call.  The order entry 
person will ask for the following information: 
1.  Software Upgrade Part Number you require: 
Dual Display with Auto/Manual – 50004634-501, or 
Set Point Programming (includes Dual Display and Auto/Manual) – 
50004634-502 
2.  Model Number of your instrument(s) 
3.  Serial Number of your instrument(s) 
4.  Code Numbers 1, 2 and 3 from your instrument(s) 
5.  Purchase order number. 
 
With this information, a new code number set will be generated for your 
instrument. 
12 
When you have the new code number set, repeat steps 1 to 6. 
13  Press the FUNCTION Key.  The instrument will now display “XXXX” 
“ENTER1”, where XXXX is a unique code number for this particular 
instrument.  Using the 
 and   keys, enter the new Code 1 number. 
14  Press the FUNCTION Key.  The instrument will now display “XXXX” 
“ENTER2”.  Using the 
 and   keys, enter the new Code 2 number. 
15  Press the FUNCTION Key.  The instrument will now display “XXXX” 
“ENTER3”.  Using the 
 and   keys, enter the new Code 3 number. 
16  Press the FUNCTION Key.  The instrument will process the new code 
numbers and add the new software feature.  If the code numbers were 
entered incorrectly, the controller will go into Manual Mode and flash the 
message “FAILSAFE” on the lower display.  Repeat steps 12 through 16. 
17 
When the instrument finishes the operation, it automatically resets itself and 
restarts in the product mode.  The instrument configuration now includes 
the added software feature(s).