MODEL | SECTION 10.0 |
| TROUBLESHOOTING |
SECTION 10.0
TROUBLESHOOTING
10.1 OVERVIEW
The 54eA analyzer continuously monitors itself and the sensor for faults. When the analyzer detects a fault in the oxygen sensor or in the instrument itself it displays a fault message. If alarm 4 was enabled, the red FAIL LED will also light and relay 4 will activate. The outputs will go to 22.00 mA or to the value programmed in Section 5.5.
See Section 10.2 for an explanation of fault messages and suggested corrective actions.
The analyzer also displays error and warning messages if a calibration is seriously in error. Refer to the section below for assistance. Each section also contains hints for correcting other measurement and calibration problems.
| Measurement | Section |
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| Temperature | 10.3 |
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| Dissolved oxygen | 10.4 |
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For troubleshooting not related to measurement problems, see Section 10.5.
To view diagnostic variables, go to the main display and press any key. Move the cursor to “Diagnostic variables” and press Enter (F4). Use the or key to move up or down the list.
10.2 TROUBLESHOOTING WHEN A FAULT MESSAGE IS SHOWING
| Fault message | Explanation | See Section |
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| High input current | input current exceeds 210 uA | 10.2.1 |
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| Check sensor zero | sensor current was too high when sensor was zeroed | 10.2.2 |
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| Temp error low | temperature less than | 10.2.3 |
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| Temp error high | temperature greater than 130°C | 10.2.3 |
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| Sense line open | RTD sense line is open | 10.2.4 |
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| Failure factory | instrument needs factory calibration | 10.2.5 |
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| Failure eeprom | write verify error has occurred | 10.2.5 |
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