04/08  UDC3200 Universal Digital Controller Operator Manual  77 
4.5.6 Error Codes 
Table 4-10  Procedure for Accessing Accutune Error Codes 
Step Operation Press Result
1
Select Accutune 
Set-up Group 
SetupSetup
Upper Display = SETUP
Lower Display = ACCUTUNE
2
Go to Error Code 
Prompt
FunctionFunctionFunction
Upper Display = (an error code) 
Lower Display = AT ERROR 
Table 4-11 lists all the error codes, definitions, and 
fixes.
Table 4-11  Accutune Error Codes 
Error Code 
(Upper Display)  Definition Fix
RUNNING
ACCUTUNE RUNNING 
The Accutune process is still active (Read Only) 
NONE
NO ERRORS OCCURRED 
DURING LAST ACCUTUNE 
PROCEDURE
None
ID FAIL 
PROCESS IDENTIFICATION 
FAILURE
Autotune has aborted 
because an illegal value of 
GAIN, RATE, or reset was 
calculated.
  Illegal Values 
– try Accutune again.
  untunable process -- contact local application 
engineer.
ABORT
CURRENT ACCUTUNE 
PROCESS ABORTED 
caused by the following 
conditions:
a. Operator changed to 
Manual mode 
b. Digital Input detected 
c. In Heat region of output 
and a Cool output calculated 
or vice versa.
Try Accutune again 
SP2
LSP2 not enabled or LSP1 or 
LSP2 not in use (only applies 
to Duplex Tuning) 
Enable LSP2 and configure the desired LSP1 and 
LSP2 setpoints. 
Aborting Accutune 
MAN-AUTO
Completing Accutune