Rotex A1 BG Inline - Page 28

6 x Faults and failures
28
BA ROTEX A1 BG Inline - 10/2007
Tab. 6-2 Fault code for gas condensing boiler A1 (recognisable by central unit)
Tab. 6-3 Fault code for gas condensing boiler A1 (Automat firing unit recognisable by central unit)
14-7 Modem contact Fault signal
15-7 Burner blockage contact Fault signal
16-0 Flue gas temperature sensor Short circuit
16-1 Interruption
16-7 Fault signal
17-0 Return flow sensor Interruption
17-1 Short circuit
30-2 Burner No switching off
30-3 No switching on
33-5 Flue gas temperature Overshooting
70-0 Address Address collision of the BUS subscribers
70-1 Activity No T2B signal, check BUS cable and connections
70-6 Communication between THETA 23R
control and CVBC automatic firing unit
Interruption
71-0 EEPROM Internal fault
71-1 EEPROM faulty Internal fault
Fault code Component/name Fault
Fault code Component/name Fault
E 01 CVBC automatic firing unit
interlocking fault
No flame detection during the 5 possible start attempts
E 02 Wrong flame signal ionisation current outside the permitted range
E 03 STB failure: Inflow temperature too high
E 05 No speed signal from burner fan within 10 sec
E 08 Fault in the flame monitoring routine
E 10 EEPROM communication error
E 11 CVBC automatic firing unit
interlocking fault
Sensor equalisation procedure for electronic STB function faulty or return flow temperature higher
by 3 K than inflow temperature for more than 3 min.
E 19 Microprocessor H - I/O error
E 20 Microprocessor L - I/O error
E 21 Microprocessor H - A/D-converter error
E 22 Microprocessor L - A/D-converter error
E 25 Internal fault
E 26 5 times flame stalling within 4 minutes
B 09 CVBC automatic firing unit
temporary failure
Error in gas valve control routine
B 30 Inflow sensor short circuit
B 31 Inflow sensor interruption
B 34 Low voltage (< 185 V)
B 35 Fluctuating mains frequency (more than
±2 Hz)
B 37 Internal fault
B 43 Return flow sensor short circuit
B 44 Return flow sensor interruption
B 99 Internal communication between THETA 23R control and CVBC automatic firing unit interrupted.