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| Troubleshooting/Service |
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| Lower |
| Reason for Failure |
| How to Correct the Problem | |
| Display |
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| IN2RNG |
| Input 2 out of range. The remote input |
| Same as IN1RNG above. | |
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| is outside the range limits. |
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| IN2_FL |
| Two consecutive failures of input 2 |
| Same as IN1FL above. | |
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| integration. i.e., cannot make analog |
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| to digital conversion. |
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| CNFERR |
| • PV low limit is > PV high limit |
| 1. Check the configuration for each item and | |
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| • SP low limit is > SP high limit |
| reconfigure if necessary. | |
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| • Output low limit > Output high limit |
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| PV LIM |
| PV out of range. |
| 1. Make sure the input signal is correct. | |
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| PV = INP1 x RATIO1+ INP1 BIAS |
| 2. Make sure the Ratio and Bias settings are | |
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| correct. | |
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| 3. Recheck the calibration. Use Bias of 0.0 | |
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| RV LIM |
| The result of the formula shown below |
| 1. Make sure the input signal is correct. | |
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| is beyond the range of the remote |
| 2. Make sure the Ratio2 and Bias2 settings are | |
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| variable. |
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| correct. | ||
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| RV = INP2 X RATIO + BIAS |
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| 3. Recheck the calibration. Use a Ratio2 of 1.0 | ||
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| and a Bias2 of 0.0. | |
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| SEGERR |
| Setpoint Program start segment |
| Check SP Program configuration, subsection 3.5 | |
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| number is less than ending segment |
| Set up Group SPPROG function prompts | |
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| number. |
| “STRSEG” and “ENDSEG”. | |
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| TCWARN |
| The Thermocouple is starting to |
| This diagnostic message means that the | |
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| burnout. |
| controller has detected that the thermocouple is | |
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| starting to burnout. This error message may also | |
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| be created if the resistance of the wires used to | |
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| connect the thermocouple to the instrument is | |
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| above 100 ohms. | |
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| TCFAIL |
| The Thermocouple is in imminent |
| This diagnostic message means that the | |
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| danger of burning out. |
| controller has detected that the thermocouple | |
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| will soon fail. User should consider replacing the | |
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| thermocouple as soon as possible. This | |
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| message will also be generated if the resistance | |
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| of the wires used to connect the thermocouple to | |
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| the instrument is above 180 ohms. | |
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| OUT1FL |
| Current Output is less than 3.5 mA. | The current output is open circuit. Check the | ||
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| field wiring. See Procedure #2. | |
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| OUT2FL |
| Auxiliary Output is less than 3.5 mA. | The auxiliary output is open circuit. Check the | ||
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| field wiring. See Procedure #10. | |
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4/07 | UDC2500 Universal Digital Controller Product Manual | 163 |
