8
8 Troubleshooting
System faults are distinguished into two general categories:
Faults that are automatically detected by the controller and therefore can be
◼
displayed using error messages
Faults that the controller cannot detect
◼
8.1 Faults with error messages
LED
Meaning
Measures
LED red flashes:
1 x
Collector sensor cable is inter-
◼
rupted
Check wiring / replace
it
Check sensor resistance
and replace sensor if
necessary
LED red flashes
2 x
Short-circuit in the collector
◼
sensor cable
LED red flashes:
3 x
Storage sensor cable is inter-
◼
rupted
LED red flashes:
4 x
Short-circuit in the storage
◼
sensor cable
LED red is on
no flow
◼
Error in the pump connection
◼
Pump defective
◼
Air in the system
◼
Check cable
Replace pump
Deaerate the system
