Riello PRESS 4GJ Manuel D'entretien page 47

FAULT
The burner does not start
The burner starts
but stops almost immediately
After pre-purge the burner goes to
lock-out and the flame does not
appear
The burner goes to lock-out right
after flame appearance
Firing with pulsations or flame
detachment
The burner does not pass to 2nd
stage
or fuel passes to 2nd stage but air
remains in 1st
Unever fuel supply
Interminally rusted pump
Noisy pump, instable pressure
Pump unprimes after prolonged
pause
Pump leaks light oil
Smoke in flame - dark Bacharach
- yellow Bacharach
Dirty combustion head
(1) The fuse is accessible from the outside of the control box by unsrewing the apposite fuse-carrier.
PROBABLE CAUSE
- No electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Close all switches - Check fuses
- A limit or safety control device is open . . . . . . . . . . . . . . . . . . . . . . . Adjust or replace
- Control box lock-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset control box
- Motor lock-out (NO PRESS GW) . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cutout
- Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Control box fuses blown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace (1)
- Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . Check connections
- Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Defective motor command control device (NO PRESS GW) . . . . . . Replace
- Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Defective capacitor (Press GW Model). . . . . . . . . . . . . . . . . . . . . . . Replace
- Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace photocell
- Light is entering or flame is simulated. . . . . . . . . . . . . . . . . . . . . . . . Eliminate light or replace control box
- Missing phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cutout
thermal cutout triggers
- No fuel in tank; water on tank bottom . . . . . . . . . . . . . . . . . . . . . . . . Top up fuel level or suck up water
- Inappropriate head and air damper adjustments . . . . . . . . . . . . . . . Consult manual
- Light solenoid valve fails to open . . . . . . . . . . . . . . . . . . . . . . . . . . . Check connections; replace coil
- Nozzle clogged, dirty, or deformed . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Dirty or poorly adjusted firing electrodes. . . . . . . . . . . . . . . . . . . . . . Adjust or clean
- Grounded electrode due to broken insulation . . . . . . . . . . . . . . . . . . Replace
- High voltage cable defective or grounded. . . . . . . . . . . . . . . . . . . . . Replace
- High voltage cable deformed by high temperature . . . . . . . . . . . . . . Replace or protect
- Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Erroneous valve or transformer electrical connections . . . . . . . . . . . Check
- Control box defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Pump unprimed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prime pump and see "Pump unprimes"
- Pump/motor coupling broken . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Pump suction line connected to return line . . . . . . . . . . . . . . . . . . . . Correct connection
- Valves up-line from pump closed . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
- Filters dirty: line - pump - nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
- Incorrect motor rotation direction . . . . . . . . . . . . . . . . . . . . . . . . . . . Change motor electrical connections
- Presence of electromagnetic disturbance. . . . . . . . . . . . . . . . . . . . . Use the radio disturbance protection kit
- Delayed firing by electrodes or poorly adjusted head . . . . . . . . . . . . Adjust
- Defective photocell or control box. . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Dirty photocell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
- Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust according to Manual
- Poorly adjusted firing electrodes. . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust according to Manual
- Poorly adjusted fan air gate: too much air . . . . . . . . . . . . . . . . . . . . Adjust
- Nozzle unsuited for burner or boiler . . . . . . . . . . . . . . . . . . . . . . . . . See Nozzle Table; reduce 1st stage
- Defective nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Inappropriate pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust according to manual
- Control device TR does not close . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust or replace
- Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- 2nd stage sol. valve coil defective . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Piston jammed in valve unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace entire unit
- Low pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
- Defective cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Check if cause is in pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Feed burner from tank
or fuel supply system
- Water in tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suck water from tank bottom with separate pump
- 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 according to Manual
- Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
- Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
- Erroneous pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust to between 10 - 14 bar
- Dirty fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
- Flame stability disk dirty, loose, or deformed . . . . . . . . . . . . . . . . . . Clean, tighten in place, or replace
- Boiler room air vents insufficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
- Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate according to Manual
- 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 as per Manual instructions; open gate valve
- Blast tube length unsuited to boiler. . . . . . . . . . . . . . . . . . . . . . . . . . Contact boiler manufacturer
SUGGESTED REMEDY
when third phase returns
located near burner
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