Endress+Hauser Liquicap M FTI51 User Manual

Troubleshooting Liquicap M FTI51, FTI52
78 Endress+Hauser
9Troubleshooting
9.1 Fault diagnostics in the electronic insert
!
Note!
In the event of faults during commissioning or operation of the device, you have the ability to carry
out fault diagnostics on the electronic insert. This function is supported by the electronic inserts
FEI51, FEI52, FEI54, FEI55 (see error table 1 and 2 below).
The electronic inserts FEI53 and FEI57S signal two types of faults:
• Correctable faults: The red LED flashes.
• Non-correctable faults: The red LED is lit continuously.
For additional information on fault detection and fault elimination, refer to fault table 2 below.
9.1.1 Activating fault diagnostics
!
Note!
The diagnostics provide information about the operating status of the device. The results of the
diagnostics are displayed by LEDs 1, 2, 4 and 5. If the diagnostics detect multiple faults, these are
shown according to their priority. A serious fault (e.g. priority 3) is always displayed before a less
serious fault (e.g. priority 5).
To activate the fault diagnostics, proceed as follows:
1. Set the function switch to position 1 (operation).
2. Press the "–" key.
3. "Fault table 1" lists possible causes of faults and information on how to eliminate them.
LEDs for diagnostics Error table 1 (FEI51, FEI52, FEI54, FEI55)
Cause Remedy Priority1
green
2
green
3
red
4
green
5
green
6
yel-
low
No fault
On Internal fault. The device is defective. 1
On On Calibration point(s) are outside the
measuring range
Recalibrate 2
On The calibration point is too close to the measuring
range limit.
Reduce the switch point or select a new installation
location.
3
On On No calibration has yet been carried out. Carry out empty and/or full calibration. 4
On The DC PNP output is overloaded.* Reduce the connected load. 5
On On The capacitance change from "Probe not covered"
to "Probe covered" is too small.
The capacitance change between the uncovered and
covered probe must be greater than 2 pF.
6
On On Sensor DAT (EEPROM) data are invalid. Carry out download from the electronic insert. 7
On On On Probe is not detected.** This probe type is not compatible. Use a Liquicap M
probe.
8
On The measured temperature is outside the permitted
temperature range.
The device may be operated in the specified temperature
range only.
9
* Applies only to electronic insert FEI52.
** A connection to the sensor DAT (EEPROM) could not be established.
Error table 2 (FEI53, FEI57S)
Cause Remedy
The device does not switch. Check the connection and the supply voltage.
Alarm LED flashes. The ambient temperature of the electronics is outside the permitted range or the
connection to the probe is interrupted.

Endress+Hauser Liquicap M FTI51 Specifications

General

Brand	Endress+Hauser
Model	Liquicap M FTI51
Category	Switch
Language	English