System Operation Messages / Faults
Fault code number Aids
H 508 Internal comparison: relay output terminal 76 does not pull on A19, A7
H 520 Internal comparison: relay output terminal 67 does not drop out A19, A7
H 521 Internal comparison: relay output terminal 43 does not drop out A19, A7
H 522 Internal comparison: relay output terminal 16 does not drop out A19, A7
H 523 Internal comparison: relay output terminal 11 does not drop out A19, A7
H 524 Internal comparison: relay output terminal 45 does not drop out A19, A7
H 525 Internal comparison: relay output terminal 68 does not drop out A19, A7
H 526 Internal comparison: relay output terminal 36 does not drop out A19, A7
H 527 Internal comparison: relay output terminal 41 does not drop out A19, A7
H 528 Internal comparison: relay output terminal 76 does not drop out A19, A7
H / Ü 600 Program monitoring time (FAT) elapsed cause H1,H6
H / Ü 601 Leakage test fault: gas pressure still present
Main gas 1 defective
CAUTION! Follow safety instructions in the aids I1,H6,I4
H / Ü 602 Leakage test fault: gas pressure still present
Main gas 2 defective
CAUTION! Follow safety instructions in the aids I2,H6,I4
H / Ü 603 Vent gas line manually I3
st
H / Ü 604 Flame signal does not promptly follow 1 safety period H2
H 605** Oil pressure >min!!! H5
H 606* Gas >min occurs in oil operating mode H3
H 607* Ignition position acknowledge drops out inadmissibly
between ignition position and end of safety period 2 H4
H 608 Boiler safety interlock circuit drops out inadmissibly
H 609* Gas safety interlock circuit drops out inadmissibly
H 610** Oil safety interlock circuit drops out inadmissibly
H / Ü 611** Gas pressure too low. gas >min during operation
H / Ü 612* Gas pressure too high
H 613 Air pressure signal absent
H 711 Inadmissible operating mode change H6
H 700 Pre-ventilation signal present without signal on terminal 2 G2,G5
H 701 Flame signal present without signal on terminal 2 G2
H 702 Flame signal appears during pre-ventilation G2,G5
H 703 Flame signal goes out, although terminal 2 signal still present G2
87
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