Maintenance | |
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5.1.2 Last Fault
The Last Fault screen provides a text description of all current faults that have been detected by the instrument. Once the cause of the fault(s) has been cleared, its description is removed from the screen. The name of the last fault, however, is retained on the screen. This is useful in determining the cause of an intermittent type fault.
To display the Last Fault screen, first display the Diagnostics menu as described in Section 5.1. Next, use the Up and Down buttons to highlight “LAST FAULT” and then press ENT. If necessary, use the Up and Down buttons to scroll through the fault list. A list of possible fault messages is shown below.
The numbers in brackets “< >” are the fault numerical codes that appear on the Diagnostics Sensor Data screen (refer to Section 5.1.1).
Fault Codes are Additive: The fault codes appearing on the Sensor Data, Diagnostics screen (refer to Section 5.1.1) are additive. For example: A fault code of <0810> indicates that both a Search Flow Fault <0800> and a Loop Open error <0010> have occurred.
Box Temp Error <0001>: Enclosure temperature is high. Check that the enclosure is not being subjected to extreme temperatures. Use the Sensor Data screen to check the box temperature (refer to Section 5.1.1).
Bench Temp Error <0002>: Optical bench temperature is high. Check that the enclosure is not being subjected to extreme temperatures. Use the Sensor Data screen to check the box temperature (refer to Section 5.1.1).
Loop Open <0010>: The 4−20 mA current loop is open, or there is a high resistance in the circuit. Check the wiring to the load/monitoring circuit.
If this feature is not being used, a 100 ohm resistor must be connected to the 4−20 mA output connector (refer to Section 2.8).
Internal CAL Error <0020>: An internal calibration failure has occurred. Repeat internal calibration procedure per Section 3.2.
External CAL Error <0040>: An external calibra- tion failure has occurred. Repeat external cali- bration procedure per Section 3.3.
Digipot Range Error <0200>: The digital potentiometer circuit is out of its normal operating range. Call Bacharach Service with this information for further instructions.
Leak Pressure Fault <0100>: The pressure of the internal leak source has dropped below its minimum value. Call Bacharach Service with this information for further instructions.
A/D Failure <0400>: A failure has occurred in the instrument’s
Search Flow Fault <0800>: This error occurs in the search mode when the gas flow through the detector has significantly changed. Check that the probe connector is plugged into the instru- ment, the probe hose is not kinked, and the filter in the probe tip is not clogged. Also check for a blocked internal filter or failed pump.
Measure Flow Fault <1000>: This error occurs in the measure mode when the gas flow through the detector has significantly changed. Check that the probe connector is plugged into the instru- ment, the probe hose is not kinked, and the filter in the probe tip is not clogged. Also check for a blocked internal filter or failed pump.
No Flow <2000>: Gas flow through the detector has stopped. Check that the probe hose is not kinked, and the filter in the probe tip is not clogged. Also check for a blocked internal filter or failed pump.
Zero Volt Error <4000>: The detector’s output voltage may be out of tolerance. Use the Sensor Data screen to check the detector voltage (refer to Section 5.1.1). Call Bacharach Service with this information for further instructions.
A/D Clipping Error <8000>: The detector voltage may be out of tolerance. Use the Sensor Data screen to check the detector voltage (refer to Section 5.1.1). Call Bacharach Service with this information for further instructions.
38 | Instruction |
