Faults - Possible Causes - Solutions - Riello RLS 70 Installation Instruction

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Faults - Possible causes - Solutions

Find a list of faults, causes and possible solutions for a set of fail-
ures that may occur and result in irregular burner operation or no
functioning at all.
Control program under fault
conditions and lock-out
indication
Faults - Possible causes - Solutions
In case of any disturbance, the sequence mechanism stops and with it the lock-out indicator. The symbol
above the reading mark of the indicator gives the type of disturbance:
No start, e.g. because one contact is not closed. Lock-out during or after control program sequence
due to extraneous light (e.g. non-extinguished flames, leaking fuel valves, defects in the flame super-
vision circuit, etc.).
Interruption of startup sequence, because the OPEN signal has not been delivered to terminal 8 by
cam 1 (gas) or cam 4 (oil). Terminals 6, 7 and 14 remain under voltage until the fault has been cor-
rected!
Lockout, because there is no air pressure indication at the beginning of air pressure control.
P
Every air pressure failure after this moment in time leads to lock-out, too!
Lock-out due to a fault in the flame supervision circuit.
Interruption of startup sequence, because the position signal for the low-flame position has not
been delivered to terminal 8 by cam 3 (gas) or cam 5 (oil). Terminals 6, 7 and 14 remain under volt-
age until the fault has been corrected!
Lock-out, because no flame signal is present after completion of the (1st) safety time.
1
Lock-out, because no flame signal has been received on completion of the 2nd safety time (flame
2
signal of the main flame with interrupted pilot burners).
Lock-out, because the flame signal has been lost during burner operation.
If lock-out occurs at any other moment in time between the start and the pre-ignition wich is not marked by a
symbol, this is usually caused by a premature, i.e. faulty flame signal, e.g. caused by a self-igniting UV tube.
If a burner malfunction is detected, first of all:
• check that the electrical wiring is adequately connected;
• check whether fuel is delivered;
• check that every adjustment parameter is adequately set.
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