Steca TR A502 TT, Инструкция по установке и эксплуатации

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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