24
Troubleshooting
Malfunction Cause of malfunction / Trouble shooting
Machine does not start
Check electricity supply.
Check main switch.
Check cable connections.
Check board.
Check pressure switch.
Switch off by overcurrent release.
Heating (burner)
Fuel pump/blower operates, but
burner does not heat.
Fuel pump/blower does not operate.
- Pump makes lots of noise
- Fuel operating pressure has not been
reached
Coupling between burner motor and
fuel pump is broken
Solenoid valve on the fuel pump
does not open
Test: Pressure switch (black)
Bridge in terminal box between
terminal 3 +4
Test: Connect solenoid valve 230 V
externally
Oil pressure on the fuel pump is
too low
too high
Set water temperature is reached.
Increase temperature on thermostat with rotary
control switch.
Open gun, until temperature drops.
Fuel tank is empty.
Fuel filter is dirty.
Fuel nozzle is dirty.
Float switch in fuel tank is defect.
Blower/fuel pump motor is defect.
Check electrical equipment.
Check fuse in terminal box.
Coupling between burner motor and fuel pump is
defect.
Water in fuel tank.
Dirt or rust in the fuel pump.
Clean tank.
Replace fuel pump.
Check pressure switch (black).
Solenoid valve is defect or dirty.
Clean filter, clean supply line, clean fuel pump.
Setting is wrong.
Clean fuel nozzle, or replace it.
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