Spirax Sarco LCS3050, Installation And Maintenance Instructions Manual, Page: 17 / 24

IM-P693-06 EMM Issue 1
17
LCS3050 Low Water Level Switch for two probes
Diagnosis
Display 1 and activity Display 2 Fault Remedy
LED alarm 1 and diagnosis
LED 1 illuminated. Press and
hold down key AL1.
Diagnosis LED 1 flashing.
Malfunction in level probe 1,
malfunction in level switch,
faulty wiring,
faulty measuring voltage.
–
–
–
–
check wiring,
measure probe voltages,
clean and, if necessary,
exchange level probe,
exchange level switch.
Diagnosis LED 2 flashing.
Malfunction in level probe 1,
malfunction in level switch,
faulty wiring.
Diagnosis LED 3 flashing.
Interference voltage causing
malfunction, boiler earth
without PE
Provide screen and
earthing, connect boiler
with PE.
LED alarm 2 and Diagnosis
LED 2
illuminated. Press and hold
down key AL2
Diagnosis LED 1 flashing.
Malfunction in level probe
2, malfunction in level
switch, faulty wiring, faulty
measuring voltage.
–
–
–
–
check wiring,
measure probe voltages,
clean and, if necessary,
exchange level probe,
exchange level switch.
Diagnosis LED 2 flashing.
Malfunction in level probe 2,
malfunction in level switch,
faulty wiring.
Diagnosis LED 3 flashing.
Interference voltage causing
malfunction, boiler earth
without PE.
Provide screen and
earthing, connect boiler
with PE.
LED alarm 1 and 2 and
Diagnosis LED 3
illuminated. Press and hold
down key AL1 or AL2.
Diagnosis LED 1 flashing. Malfunction in processor
Replace level switch. Diagnosis LED 2 flashing. Internal voltage fault.
Diagnosis LED 3 flashing. Malfunction in relay.
Once the fault is eliminated, the level switch returns to normal operation.
After elimination of the fault switch off the supply voltage and switch it on again after approx. 5 sec.