24
Fault indications and troubleshooting
Indications, diagnosis and remedies
continued
continued
Fault indications
The LEDs indicate a malfunction
Indication
Current
output
[mA]
Error
Remedy
Red LED flashing
0
Electrode wires interrupted or
measuring surface/measuring
electrodes exposed.
Check connections of electrode wires (electronic
circuit board, terminal lugs 1-4). If necessary, replace
equipment. Check water level and/or installation.
0
Short circuit in electrode wires
Check connections of electrode wires
(electronic circuit board, terminal lugs 1-4).
If necessary, replace equipment.
4
Value below set value 0%, e.g.
measuring surface/measuring
electrodes exposed.
Check water level and/or installation
Green LED
flashing
20
Value above set value 100%,
e.g. measuring range too
small.
Set a larger measuring range.
Red and green
LEDs are flashing
alternately
0
Temperature in terminal box
exceeds 85°C
Check ambient temperature, make sure it does not
exceed 70 °C.
Red and green
LEDs are flashing
alternately
0.5
Open or short circuit in wires
to resistance thermometer.
Faulty thermometer.
Outside range 0 - 280°C.
Check connections of thermometer wires
(electronic circuit board, terminal lugs 5-6).
If necessary, replace equipment.
Red and green
LEDs are flashing
alternately and
rapidly
20
Code switch 10 set to ON
Set code switch 10 to OFF
Note
To observe the LEDs for fault indication, open the terminal box by unscrewing the
cover screws
f
and removing the housing cover
g
. The arrow on this cover points to
the name plate.
Fig. 1, 9
