afriso OM 1 Notice Technique page 86

9 Troubleshooting
The product is safety-related 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 supply 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
Light reaches the photo-
electric probe
Float of the floating
probe cannot move
Probe defective
Repair
Apply supply voltage
Replace the mains fuse
Connect the flat cable
to the printed circuit
board
Remove the cause of
the alarm
Remove the cause of
the alarm
Connect the probe
Insert a jumper at the
unused terminal block
Mount the probe at a dif-
ferent position or protect
the probe against light
Find a different position
for the floating probe or
remove the immobility
of the float
Replace the probe
OM 5 / OM 5+1 / OM 1
EN
35