Riello RL 42 BLU Installation, Use And Maintenance Instructions page 28

Signal Fault
Internally rusted pump
Noisy pump, unstable pres-
sure
Pump unprimes after pro-
longed pause
Pump leaks light oil
Smoke in flame
- dark Bacharach
- yellow Bacharach
Dirty combustion head
10 x blinks The burner goes to lock-out Connection or internal fault
20023224
Faults - Possible causes - Solutions
Probable cause
Water in tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suck water from tank bottom with sepa-
Air has entered the suction line . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
- Depression value too high (higher than 35 cm Hg):
Tank/burner height difference too great . . . . . . . . . . . . . . . . Feed burner with loop circuit
Piping diameter too small . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
Suction filters clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
Suction valves closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
Paraffin solidified due to low temperature . . . . . . . . . . . . . . . Add additive to light oil
Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . . . . . Bring to same height as suction pipe
Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
Leakage from sealing organ . . . . . . . . . . . . . . . . . . . . . . . . . Replace pump
Not enough air. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate
Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
Erroneous pump pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust to between 10 - 14 bar
Flame stability spirat dirty, loose, or deformed . . . . . . . . . . . Clean, tighten in place, or replace
Boiler room air vents insufficient . . . . . . . . . . . . . . . . . . . . . . Increase
Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate
Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
Unsuitable nozzle delivery or angle . . . . . . . . . . . . . . . . . . . See recommended nozzles
Loose nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten
Impurities on flame stability spiral . . . . . . . . . . . . . . . . . . . . . Clean
Erroneous head adjustment or not enough air . . . . . . . . . . . Adjust; open gate valve
Blast tube length unsuited to boiler . . . . . . . . . . . . . . . . . . . . Contact boiler manufacturer
Presence of electromagnetic disturbance . . . . . . . . . . . . . . . Use the radio disturbance protection kit
26 GB
Suggested remedy
rate pump
Tab. H