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System Operation Messages / Faults

Fault code number Aids

Ü 746 Solenoid valve cur-out defective H6

Ü 747 Leakage test: venting into boiler not permitted H6

Ü 750 Fault cut-out via the BUS

Ü 751** No data transfer via BUS (time-out)

Ü 760 Fuel change not permitted during adjustment G3

Ü 791** BUS master is stopped

Ü 792** BUS data length is wrongly designed

Ü 793** BUS master is disconnected

H / Ü 800 Error in the parameters, A7,A9,

at parameter No. A14

H / Ü 900 Fault in sequencer internal self-test A7

H / Ü 901 Terminal 10 +24 volt cut-out defective A7,A21,A22

H / Ü 902 Fault in over-voltage self-test A7

H / Ü 903 Fault in optical coupler self-test A7,G7

Ü 904* Fault in the load reference A7,A21

Ü 905* Fault in the reference element of the main processor A7,A21

H 906* Fault in the reference element of the monitoring processor A7,A21

Ü 911* Fault in the reference, channel 1 A7,A21

Ü 912* Fault in the reference, channel 2 A7,A21

Ü 913* Fault in the reference, channel 3 A7,A21

Ü 914* Fault in the reference, channel 4 A7,A21

Ü 915* Fault in the reference, channel 5 A7,A21

H / Ü 921 Relay driver self test: terminal 11 output defective A19,A7,A25

H / Ü 922 Relay driver self test: terminal 16 output defective A19,A7

H / Ü 923 Relay driver self test: terminal 43 output defective A19,A7

H / Ü 924 Relay driver self test: terminal 67 output defective A19,A7

H / Ü 925 Relay driver self test: terminal 45 output defective A19,A7,A25

H / Ü 926 Relay driver self test: terminal 68 output defective A19,A7

H / Ü 927 Relay driver self test: terminal 36 output defective A19,A7

H / Ü 928 Relay driver self test: terminal 41 output defective A19,A7

H / Ü 929 Relay driver self test: terminal 76 output defective A19,A7

H / Ü 998 Internal fault: A7

H 999 Internal fault: A7

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