113
Display message
F1
R e t u r n
h i g h
T e m p
p u m p
o n
9 9 9 , 5
h r s
Reason:
Maximum return temperature exceeds limit value.
Cause:
Systems that pre-heats the boiler return temperature too much/high.
Corrective action:
Reduce pre-heat temperature of external heat source.
Cause:
The need for heat in the system suddenly drops causing hot return water to the boiler.
Corrective action:
Dampen external heating system control to prevent sudden boiler temperature rise.
Display message
F3
R e t u r n
s e n s o r
e r r o r
p u m p
o n
9 9 9 , 5
h r s
Reason
Return sensor is not detected by the boiler PCB.
Cause:
Bad wiring/connection in the return sensor circuit.
Corrective action:
Check for loose wiring/connections in the return sensor circuit.
Cause:
Bad temperature sensor causing a fault signal.
Corrective action:
Replace return sensor.
Display message
F12
p r o g r a m m i n g
e n d
p u m p
o n
9 9 9 , 5
h r s
Reason
Programming of the parameters completed successfully.
Cause:
Programming of the parameters completed successfully.
Corrective action:
This message occurs to confirm the end of programming. Pressing RESET will return the
unit in normal operating status.
