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