afriso OM 1 Notice Technique page 78

9 Troubleshooting
The product is safety equipment.
Any malfunctions that cannot be removed by means of the measures
described in this chapter may only be repaired by the manufacturer.
Problem
Green LED is not on
Red LED is on or
flashes
Red LED does not light
up, even though the
photoelectric probe is
submerged in liquid or
the floating probe
should respond
Troubleshooting
Possible reason
No mains voltage
Mains fuse defective
Flat cable not con-
nected to printed circuit
board
Alarm: Photoelectric
probe submerged
Alarm: Minimum level
or maximum level
reached
Probe not connected
No wire jumper at
unused terminal block
for probe
External light reaches
the photoelectric probe
Float of the float cannot
move
Probe defective
Repair
Apply mains voltage
Replace the mains fuse
Connect the flat cable
to the printed circuit
board
Remove cause of alarm
Remove cause of alarm
Connect probe
Jumper unused probe
terminals at corre-
sponding terminal block
Find a different position
for the photoelectric
probe or protect it
against external light
Find a different position
for the floating probe or
remove the immobility
of the float
Replace the probe
EN
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