Liquiphant FTL62 HART Diagnostics and troubleshooting
Endress+Hauser 39
11 Diagnostics and troubleshooting
11.1 General troubleshooting
11.1.1 General errors
Device not responding
• Possible cause: Supply voltage does not match the specification on the nameplate
Remedial action: Apply the correct voltage
• Possible cause: The polarity of the supply voltage is wrong
Remedial action: Correct the polarity
• Possible cause: The cables do not contact the terminals properly
Remedial action: Check the electrical contact between cables and correct if necessary
• Possible cause: Load resistance too high
Remedial action: Increase the supply voltage to reach the minimum terminal voltage
No values visible on the display
• Possible cause: Graphic display is set too bright or too dark
Remedial action: Increase or decrease the contrast with the Contrast display parameter
Navigation path: System → Display → Contrast display
• Possible cause: The plug of the display cable is not connected correctly
Remedial action: Connect the plug correctly
• Possible cause: Display is defective
Remedial action: Replace the display
No background lighting on the graphic display
Possible cause: There is insufficient power available
Remedial action: Increase the supply voltage
"Communication error" is indicated on the display when the device is started or the
display is connected
• Possible cause: Electromagnetic interference influence
Remedial action: Check grounding of the device
• Possible cause: Defective cable connection or display plug
Remedial action: Replace the display
HART communication not working
• Possible cause: Communication resistor missing or incorrectly installed
Remedial action: Install the communication resistor (250 Ω) correctly
• Possible cause: The HART modem is not properly connected
Remedial action: Connect the HART modem correctly
Communication via CDI interface not working
Possible cause: Wrong setting of the COM port on the computer
Remedial action: Check the setting of the COM port on the computer and correct it if
necessary
Device measures incorrectly
Possible cause: Parametrization error
Remedial action: Check and correct the parameter configuration
No communication with device via SmartBlue
• Possible cause: No Bluetooth connection available
Remedial action: Enable the Bluetooth function on the smartphone, tablet and device
• Possible cause: The device is already connected with another smartphone/tablet
Remedial action: Disconnect the device from the other smartphone/tablet
• Ambient conditions (e.g. walls/tanks) disturbing the Bluetooth connection
Remedial action: Establish direct line-of-sight connection
• Display does not have Bluetooth
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