Rectify Faults; Diagnosis, Fault Messages; How To Proceed If A Repair Is Necessary; Dismount - SICK LFC Manuel De Mise En Service

kings on the instrument are visible.
Take note of the following:
•
Use only cleaning agents which do not cor-
rode the housings, type label and seals
•
Use only cleaning methods corresponding
to the housing protection rating
7.2

Rectify faults

Reaction when malfunction occurs
The operator of the system is responsible for
taking suitable measures to rectify faults.
Causes of malfunction
The device offers maximum reliability. Never-
theless, faults can occur during operation.
These may be caused by the following, e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
Fault rectification
The first measure to take is to check the output
signal. In many cases, the causes can be de-
termined this way and the faults quickly rectified.
Reaction after fault rectification
Depending on the reason for the fault and the
measures taken, the steps described in chapter
"Setup" must be carried out again or must be
checked for plausibility and completeness.
7.3

Diagnosis, fault messages

Checking the switching signal
The LED illuminated ring on the device indica-
tes the operating status of the device. At the
same time it indicates the switching state of the
output. This enables simple on-site diagnosis
without the need for tools.
Error Cause
Green signal Voltage
lamp off supply inter-
rupted.
Electronics
defective
Green signal Maintenance
lamp flashes requirement
LFC • Transistor (PNP)
Rectification
Check the voltage
supply and the cable
connection
Exchange the instru-
ment or send it in for
repair
Carry out mainte-
nance
Error Cause
Red signal Error with the
lamp lights electrical con-
(switching nection
output high-
Shortcircuit or
impedance)
overload
Measuring tip
damaged
Red signal Sensor out-
lamp flashes side the
(switching specification
output high-
impedance)
7.4 How to proceed if a repair is
necessary
If a repair should be necessary, please contact
your contact person.
8

Dismount

8.1

Dismounting steps

Warning:
Before dismounting, be aware of dan-
gerous process conditions such as e.g.
pressure in the vessel or pipeline, high
temperatures, corrosive or toxic media
etc.
Take note of chapters "Mounting" and "Connec-
ting to voltage supply" and carry out the listed
steps in reverse order.
8.2

Disposal

The device is made of recyclable materials. For
this reason, it should be disposed of by a speci-
alist recycling company. Observe the applicable
national regulations.
9 Certificates and approvals
9.1

Environmental instructions

Objective and measures
Protection of the environment is one of our most
important duties. That is why we have introdu-
ced an environment management system with
the goal of continuously improving company
8 Dismount
Rectification
Connect the instru-
ment according to the
wiring plan
Check the electrical
connection
Check whether the
measuring tip is da-
maged
Check the adjustment
of the sensor
23