> For the complete documentation index, see [llms.txt](https://docs.lorric.com/qr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lorric.com/qr/fu-tx310-ultrasonic-flowmeter-manual-en-v2/5-error-messages-and-solutions.md). # 5. Error Messages and Solutions | Error Type | Causes | Solutions | | -------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | |

Bit 0

ToF measurement timeout

|

  1. Initial setting error
  2. Probe not connected or poorly set up
|

  1. Initial setting error
  2. Check probe installation
| |

Bit 1

No signal

|

  1. Probe not installed or poorly installed
  2. Couplant is dry
  3. Too much grime inside the pipe
  4. Pipe liner exists but not set
|

1.Check probe installation

2. Re-coat coupling agent

3. Clean up the pipeline

4. Check initial settings

| |

Bit 2

Thermal sensor short circuit

|

  1. Sensor short circuit
  2. Instrument failure
|

  1. Check wiring
  2. Contact manufacturer
| |

Bit 3

Thermal sensor open circuit (disconnected)

|

  1. Sensor not installed
  2. Sensor disconnected
  3. Instrument failure
|

  1. Check wiring
  2. Check wiring
  3. Contact manufacturer
| |

Bit 4

Empty pipe

|

  1. Probe not connected or poorly set up
  2. No fluid in the pipe
| 1.Check probe installation 2. Confirm pipe fluid status | |

Bit 5

Poor signal quality

|

  1. Probe installed incorrectly
  2. Too much grime in the pipe
  3. Bubbles in the pipe
  4. Bubbles in the pipe
|

  1. Check probe installation
  2. Clean pipe
  3. Install probe on side surface or change installation setup location
  4. Change installation setup location
| |

Bit 6

Incorrect initial value settings

| Initial value setting error | Recheck initial value settings | |

Bit 7

Network communic ation error

| Communication module failure |

  1. Reboot
  2. Contact manufacturer
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