7
When the overheating protection device has been reset,
there should be a 12-volt input on one at-pin connector,
and a 12-volt output on the other (see g. 2 A), otherwise
it is defective and must be replaced. The overheating
protection is broken if there is 12 volt on only one cable.
NB! If the overheating protection device has tripped, it
cannot be reset until the boiler has cooled by 10-20°C.
Before the boiler is restarted, check that it has been bled
thoroughly.
- Check that the operating thermostat is turned to the maxi-
mum clockwise position (see g. 1 C).
A
B
Fig 4.
3:2:1 THE LPG BOILER SHUTS DOWN ON
START-UP
”Red LED comes on immediately”
Cause:
- Resetting time too short.
- The pressure switch does not cut out.
- Fault in electronic ignition unit.
- Faulty wiring.
- Faulty printed circuit board.
Action:
- Reset the electronic ignition unit by switching off the
boiler on the control panel (the red LED goes out) and
wait at least 30 seconds before attempting a restart.
- Check that the pressure switch cuts out. There should be
12 V on the white cable, connection no.1 on the pressure
switch (g. 4 A). If there is no voltage, replace the pres-
sure switch.
- Replace the electronic ignition unit
- Check that the wiring connections are intact and correctly
tted.
- Replace the printed circuit board with a new one.
3:2 THE LPG BOILER DOES NOT START
Initial check:
- Disconnect the ignition cable from the electronics box
and start the boiler. The electronics box should make a
clicking sound for about 10 seconds. If you can hear the
clicking, continue to section ”3:2:3 Ignition spark is gene-
rated but the boiler fails to start”.
3:2:2 NO IGNITION SPARK
Cause:
- Check that the changeover switches on the control panel
are in the correct positions (see the boiler operating
instructions.
- The 12 V fuse has blown.
- The overheating protection device has tripped.
- The red LED on the control panel is lit (shut-down)..
- No or low voltage on the boiler (< 12 V).
- The operating thermostat is broken/damaged.
- The pressure generated by the fan is too low.
- The pressure switch does not come on.
- The printed circuit board is damaged.
- Faulty electronic ignition unit.
- Faulty wiring.
Action:
- Check that the 12 V fuse (see g. 1A) is intact.
- Reset the electronics by switching off the boiler on the
control panel (the red LED light goes out) and wait
approx. 20-30 seconds before attempting to restart. If the
red LED comes on again, please refer to section ”3:2:1
The LPG boiler shuts down on start-up”.
- Check the incoming voltage, is must be no lower than
10.8 V.
- Check that the overheating protection device has not trip-
ped. If necessary, reset by rst unscrewing the black pro-
tective cap, then pressing the reset button (see g. 1 B).
Fig 5:2.
Hose tting on
press-cast burner
housing (shiny,
smooth surface)
Fig 5:1.
Hose tting on
sand-cast burner
housing (dull,
rough surface)
continue page. 8
To Next Page
Loading...
Need help?
General
