Steca TR A502 TT - Page 51

51
742.114 | 14.50
EN
The controller has detected a flow
rate fault in the primary or secondary
circuit. A permanently high tem-
perature difference exists between
the heat source and loading target.
Primary and secondary circuit pumps
are flashing. Possible causes:
• Air in system.
• The isolating valve is closed.
• The pump is faulty.
• Bleed air from the
system.
• Check the isolat-
ing valve.
• Check the pump.
The controller has detected faulty
operation of the system. This is prob-
ably caused by swapped collector
connections.
Check the collector
connections.
A short-circuit exists at output R1; the
pump connected to output R1 flashes.
Possible causes:
• The pump is faulty.
• Wiring fault.
• Check the pump.
• Check the wiring
from R1.
Output R1 is overloaded; the pump
connected to output R1 flashes.
Cause: The permissible values for R1
specified on the type plate have been
permanently exceeded; the output has
been switched off.
Check the electrical
data of the pump;
replace pump if
necessary. R1 is auto-
matically switched on
again.
A short-circuit exists at output R2; the
pump connected to output R2 flashes.
Possible causes:
• The pump is faulty.
• Wiring fault.
• Check the pump.
• Check the wiring
from R2.
Output R2 is overloaded; the pump
connected to output R2 flashes.
Cause: The permissible values for R2
specified on the type plate have been
permanently exceeded; the output has
been switched off.
Check the electrical
data of the pump;
replace pump if
necessary. R2 is auto-
matically switched on
again.
Tab. 6: Error messages