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Appendix
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F.75 Pump fault/water defi-
ciency
F.77 Accessory fault (flue non-
return flap, condensate pump,
etc.)
F.83 Fault: Flow and/or return
temperature sensor temperature
change
F.84 Fault: Temperature differ-
ence at the flow and return tem-
perature sensors
F.85 Flow and return temperat-
ure sensors have been installed
incorrectly (inverted)
46
Possible cause
D.149 = 7, incorrect pump de-
tected
D.149 = 8, flow rate at the end
of the purge programme is in-
sufficient
No feedback from the flue non-
return flap or the feedback is
incorrect
Flue non-return flap defective
No feedback from the condens-
ate pump or the feedback is in-
correct
Water deficiency
Flow NTC: No contact
Return NTC: No contact
Flow NTC installed incorrectly
Return NTC installed incorrectly
Flow/return NTC installed on
the same/incorrect pipe
Measure
1.
The detected pump is not correct for the product code; check
the product code.
2.
Use the pump that has the correct article number.
1.
Check whether the stopcocks and thermostatic valves are
open.
2.
Check the filling pressure; purge the circuit.
–
≥ 0.15 MPa (≥ 1.50 bar)
▶
Check that the flue non-return flap works without any prob-
lems.
▶
Replace the flue non-return flap.
▶
Check that the condensate pump is working correctly.
▶
Fill the heating installation. (→ Page 21)
▶
Check whether the flow NTC is lying against the flow pipe cor-
rectly.
▶
Check whether the return NTC is lying against the return pipe
correctly.
▶
Check that the flow NTC has been installed correctly.
▶
Check that the return NTC has been installed correctly.
▶
Check that the flow and return NTCs have been installed on
the correct pipe.
Installation and maintenance instructions ecoTEC plus 0020261188_00
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