Alde Compact 3020 Manual De Servicio página 12

4. ERROR MESSAGE ON THE
CONTROL PANEL
NB. An error message is only displayed when the
control panel is in standby mode (only applies to
touch panels for 3020). "Gas failure" is reset by
switching off the main switch and switching it back
on. Other error messages are reset by disconnect-
ing the main current for 12 volts and reconnecting
it again. If an AC system is installed and connected
to the boiler/panel, the 230 V supply must also be
disconnected to remove the error message.
GAS FAILURE
Caused by:
The boiler has performed repeated attempts to ignite the
burner without the electronics receiving a signal from
the sensor which monitors the flame.
The boiler performs a full start attempt. An
ignition spark and click from the gas valve are
audible.
Likely causes of the fault:
• No gas supply or gas pressure too low.
• Damaged or incorrectly installed spark plug.
• Dirt in the boiler's gas lines or jet.
Action:
• Check that all gas taps are open and functioning
properly.
• Check the cylinder pressure reducing valve. Replace
the pressure reducing valve or check if the stove top is
functioning correctly. (Air in the cylinder).
• Check that the ignition cables are connected at the
circuit board and there is no flashover along the cables.
• Remove the burner. Check that the spark gap is 4 mm.
• Perform a start attempt and check the spark with the
burner removed. NB. Refit the fan and shut off the gas.
• Clean the jet and gas line.
The boiler performs a full start attempt, but
no click is audible from the gas valve.
Likely causes of the fault:
• The gas valve is not opening.
• The electronics are not sending a signal to the gas valve.
Action:
• Check the gas valve's connection contact on the circuit
board (JP8).
• Check on start-up that there is a signal between 6 and
5 (approx. 2 seconds).
• C heck the resistance of the pull coil (resistance of 8 Ώ
between 6 and 5).
• Tap gently on the valve on start-up.
12
The boiler performs a full start attempt, but
no ignition spark is audible.
Likely causes of the fault:
• No spark from the electronics.
Action:
• Remove the ignition cables at the electronics and per-
form a new start attempt.
• If no spark is audible, replace the circuit board.
The boiler ignites but goes out again.
Likely causes of the fault:
• Gas pressure too low:
• Exhaust gas/intake hoses damaged or incorrectly
fitted.
• The gas valve opens but closes again.
• Dirt in the boiler's gas lines or jet.
• D amaged or incorrectly fitted sensor.
• The sensor circuit in the electronics is not working.
Action:
• Check that all gas taps are open and functioning
properly.
• Check the cylinder pressure reducing valve. Replace
the pressure reducing valve or check if the stove top is
functioning correctly.
• C heck the hoses and connections between flue and
boiler.
• Check the gas valve's connection contact on the circuit
board (JP8).
• Check on start-up that there is a signal between
1 and 5
at contact JP8.
• C heck that the hold circuit's resistance is 310 Ώ be-
tween 6 and 5.
• Clean the jet and gas line.
• Check that the sensor cable is connected on the circuit
board (JP7).
• Remove the burner and check the sensor plug.
• Replace the circuit board.
The fan runs for a short time.
Likely causes of the fault:
• Contact fault in the overheating sensor.
Action:
• Measure the resistance in sensor no. 2 (red cable).
Must be a closed contact; if interrupted, the sensor is
broken.