Other Faults Not Indicated In The Control Panel; Safety Checks - Alde Compact 3020 Servicehandbuch

3RD PARTY PANEL CONNECTION FAILURE
Likely cause of the fault:
• Contact fault between panel and external panel.
Wrong selection of external panel in the panel, see sep-
arate operating instructions for the Alde Compact 3020
HE .
NO MATCH HEATER/PANEL
• The control panel is not compatible with the boiler's
circuit board.
• Check the product number of the control panel. The
3020 013 control panel is for the 3020 A series boiler,
the 3020 113 is for the 3020 HE series boiler.
OTHER FAULTS NOT INDICATED IN THE
CONTROL PANEL
Boiler not working at all and the control
panel is not lit.
• 12-volt fuse has tripped. See the wiring diagram on
page 17 of the service manual.
The boiler goes out when it is meant to
switch between stages.
• Leak between the exhaust gas and intake hose.
• I nsufficient supply of gas.
• The gas valve is not opening at stage 2.
No electric power
• 230 volts is not connected or the fuse has tripped.
• Load monitor incorrectly set. If the load monitor has
a large measurement error it can affect the electric
power even if it is switched off in the control panel.
• One of the 230-volt relays is not working.
No heating in the vehicle despite the con-
trol panel being correctly set.
• One of the circulation pumps is not working.
• Air in the heating system.
Poor heating control.
• The control panel or remote sensor is not located in a
suitable position.
If an AC system is connected up with the Alde central
heating system (automatic climate control), i.e. if it
seems to be giving poor control or not switching well
between heating/cooling, you should make sure the
temperature sensor "detects" heat and cold to more or
less the same degree. In such a case it may be better
to use the rectangular sensor instead of the round one,
as the rectangular one is more sensitive to changes in
temperature. You should also make sure the AC blowers
are not pointing in an unsuitable direction.
14
No domestic hot water.
• Continuous pump operation is activated, see separate
operating instructions for the Alde Compact 3020 HE.
• Fault on domestic hot water sensor (grey cable).
• No domestic hot water selected in the panel, see
separate operating instructions for the Alde Compact
3020 HE.
• This may also be caused by the fact that day mode or
night mode is in operation and the option of shutting
down the domestic hot water has been selected.
Control panel displays:
+70°C Indoor temperature
• Short circuit in the sensor in the control panel or in the
remote sensor.
- 45°C Indoor temperature
• Failure in the sensor in the control panel or in the
remote sensor.
- 41°C Outdoor temperature
• Short circuit in outdoor sensor.

5. SAFETY CHECKS

Safety checks must be performed after each service
intervention.
Check:
• T hat the intake/exhaust gas hoses and flue do not
leak and are undamaged.
• That the LPG lines have no leaks. Check the system
for leaks.
• That the 230 V ~ earth cable is connected.
• That the safety valve on the hot water heater has not
jammed.
• That the heating system has been filled with ethylene
glycol fluid to the mark on the expansion tank.