Honeywell UDC2500 - Manual (Page 109)

Monitoring and Operating the Controller
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4.5.3 Diagnostic Messages
The UDC2500 performs background tests to verify data and memory integrity. If there is
a malfunction, a diagnostic message will be shown on the lower display. In the case of
more than one simultaneous malfunction, only the highest priority diagnostic message
will be displayed. Table 4-4 shows the error messages in order by priority. If any of these
diagnostic messages appear on the lower display, refer to Section 7 - Troubleshooting for
information on how to correct the problem.
Table 4-4 Diagnostic Messages
Prompt Description
EE FAIL Unable to write to non-volatile memory.
IN1FL Two consecutive failures of input 1 integration.
IN2FL Two consecutive failures of input 2 integration.
CFGERR Configuration Errors—Low limit greater than high limit for PV, SP, Reset, or
Output.
IN1RNG Input 1 Out-of-Range
Out-of-range
criteria:
Linear range: ± 10 % out-of-range
Characterized range: ± 1 % out-of-range
IN2RNG Input 2 Out-of-Range—Same as Input 1.
PV LIM PV Out-of-Range
PV = (PV source x PV source ratio) + PV source bias
FAILSF Failsafe — conditions for failsafe are:
… EEROM Test Failed
… Scratch Pad RAM Test Failed
… Configuration Test Failed
… Field or Factory Cal Test Failed
Check the “Status” group.
RV LIM Remote Variable Out-of-Range
RV = (RV source x RV source ratio) + RV source bias
SEG ERR Segment Error—SP Program starting segment number is less than ending
segment number.
LOCK The lockout feature has been enabled to prevent unauthorized changes of
certain functions or parameters.
TCWARN Thermocouple sensor is starting to burnout.*
TCFAIL Thermocouple sensor is in imminent danger of burning out.*
OUT1 FL Current Output 1 is less than 3.5 mA.**
OUT2 FL Current Output 2 is less than 3.5 mA.**
* The Thermocouple Error messages can be disabled via the TCDIAG configuration in the DISPLAY setup group.
** The Current Output Error messages can be disabled via the DIAGAL configuration in the ALARM setup group.