Riello PRESS 2G - 9 Faults - Possible Causes - Solutions

20140894
40
GB
Faults - Possible causes - Solutions
9 Faults - Possible causes - Solutions
FAULT PROBABLE CAUSE SUGGESTED REMEDY
The burner does not start - No electrical power supply Close all switches - Check fuses
- A limit or safety control device is open Adjust or replace
- Control box lockout Reset control box
- Motor lock-out Reset thermal cutout
- Pump is jammed Replace
- Erroneous electrical connections Check connections
- Defective control box Replace
- Defective motor command control device Replace
- Defective electrical motor Replace
- Sensor short-circuit Replace sensor
- Light is entering or flame is simulated Eliminate light or replace control box
The burner starts but stops almost immediately - Missing phase (NO PRESS GW) thermal cutout triggers Reset thermal cutout when third phase returns
After pre-purge the burner goes to lock out and
the flame does not appear
- No fuel in tank; water on tank bottom Top up fuel level or suck up water
- Inappropriate head and gate valve adjustments Consult Manual
- Gas oil 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
- Firing 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
- 1st stage sol. valve coil defective Replace
- Presence of electromagnetic disturbance Use the radio disturbance protection kit
The burner goes to lock out right after flame
appearance
- Delayed firing by electrodes or poorly adjusted head Adjust
- Defective sensor or control box Replace
- Dirty sensor Clean
Firing with pulsations or flame detachment - 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 to burner or boiler See Nozzle Table; reduce 1st stage
- Defective nozzle Replace
- Inappropriate pump pressure Adjust according to Manual
The burner does not pass to 2nd stage - 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
or fuel passes to 2nd stage but air remains in
1st
- Low pump pressure Increase
- Defective cylinder Replace
Uneven fuel supply - Check if cause is in pump or fuel supply system Feed burner from tank located near burner
Internally rusted pump - Water in tank Suck water from tank bottom with separate pump.
Noisy pump, instable pressure - 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 gas oil
Pump unprimes after prolonged pause - Return pipe not immersed in fuel Bring to same height as suction pipe
- Air enters suction piping Tighten connectors
Pump leaks gas oil - Leakage from sealing organ Replace pump