Flowserve LRG 16-40 - Manual (Page 26)

6
Malfunctions
Fault finding list for troubleshooting
Equipment does not work
Fault: No voltage supply, no function.
Remedy: Check voltage supply and wiring.
Fault: The electronic circuit board is defective.
Remedy: Replace electronic circuit board.
Only the red LED 2 is flashing
Fault: Conductivity electrode defective (internal connecting wires are short circuited or
interrupted, insulating seal defective).
Remedy: Replace conductivitiy electrode.
Fault: Measuring surface of conductivity electrode is exposed.
Remedy: Check installation and make sure that the measuring surface is submerged.
Fault: The measuring surface is contaminated and therefore an incorrect actual value is indicated
(ascertained by reference measurement).
Remedy: Remove conductivity electrode and clean measuring surface.
Fault: Dirt deposits on the measuring surface cause MAX or MIN alarms although the actual value
is between these limits (reference measurement).
Remedy: Remove conductivity electrode and clean measuring surface.
Fault: The earth connection to the vessel is interrupted. No function.
Remedy: Clean seating surfaces and screw in the equipment together with the supplied joint ring
∅ 33 x 39, form D, DIN 7603 (material: .430, bright-annealed). Do not insulate the
electrode with hemp or PTFE tape!
Green LED 1 and red LED 2 are flashing alternately
Fault: The thermal fuse has been triggered.
Remedy: Check installation. The ambient temperature must not exceed 70°C. As soon as the tem-
perature falls below the max. admissible limit, the equipment switches back to operating
mode.
Fault: The fluid temperature sensor is either short circuited or interrupted.
Remedy: Replace conductivitiy electrode.