9.8 Fault switch-off
Safety switch-off in case of flame failure during the operation.
After every safety switch-off a new ignition attempt is carried out as per program.
If this does not result in flame formation a fault switch-off occurs.
In case of fault switch-off, the reset button on the control panel should be pressed.
In case of operation disturbances (bell symbol in thew display), the digit in the dis-
play on theoperating panel points out the cause of the disturbance (see fault code
table).
Burner does not start:
- No voltage at the control and regulating centre
- no “burner ON“ signal from the heating circuit control (see fault code table )
Burner goes into disturbance status:
Without flame formation:
- No ignition
- ionisation electrode has ground connection
- no gas
In spite of flame formation the burner goes on fault after expiration of the safety
time:
- Ionisation electrode defective or soiled.
- Ionisation electrode does not penetrate the flame
9.9 Connect air pressure monitor
lines
If the air pressure monitor lines are disconnected by accident during service, they
can be connected aagian based on the schematic drawing (see Fig. 26 ).
Maintenance
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