Alde Compact 3020 Manual De Servicio página 13

OVERHEAT BLUE FAIL
Caused by:
The blue sensor on the boiler body (thermostat) has
recorded a temperature over 95°C or contact fault.
Likely causes of the fault:
• Air in the heating system.
• Poor circulation or the pump is not working.
• The sensor is damaged.
• Temperature measurement of the electronics is not working.
Action:
• B leed and check the ethylene glycol fluid level.
• Check the pumps are working
• Measure the resistance in the blue sensor. It should
be 10,000 ohms at 25°C, with the value increasing as
temperature increases. A too low value will not result
in a fault signal and will reset itself.
• M easure the voltage with the sensor fitted.
OVERHEAT RED FAIL
Caused by:
The red sensor on the boiler body (the overheating protection)
has recorded a temperature over 95°C or contact fault.
Likely causes of the fault:
• No circulation means air in the system, alternatively
poor or no circulation in the heating system (the circu-
lation pump).
• Low fluid level in the heating system.
Action:
• Bleed the system.
• Check to make sure that the circulation pump is working.
• Check the fluid level in the expansion tank.
FAN FAILURE
Caused by:
The fan has the wrong speed or no contact with
the electronics.
Likely causes of the fault:
• Break in cable between fan and circuit board.
• Fault in the fan.
• Monitoring on the circuit board not working.
Action:
• Check that the cable between the fan and the elec-
tronics is connected and intact.
• Replace the fan.
• Replace the circuit board.
BATTERY TOO LOW
Caused by:
The voltage at the boiler is below 10.5 volts.
Likely causes of the fault:
• The battery is discharged.
• Contact fault in the cabling to the boiler.
• The boiler is drawing abnormally high current.
• Fault in the circuit board.
Action:
• Check the voltage at the battery. In a no-load
state, it should be more than 12.2 volts.
• Measure the voltage to the boiler. With the burner in
operation, it should be more than 10.5 volts.
• Measure the boiler's power consumption on operation.
It should be 0.3 A on stage 1 and 0.6 A on stage 2.
WINDOW OPEN
Caused by:
Connection on the circuit board is broken.
If this is broken, the boiler will not work on LPG.
Usually this function is used to interrupt LPG
heating if a window is opened which is fitted near
the wall flue. If the function is not to be used, a
bridge must be fitted.
Likely causes of the fault:
• Break in the cable with the circuit board.
• D amaged or incorrectly fitted window contact.
• I ncorrectly fitted or missing bridge.
CONNECTION FAILURE
Caused by:
A communication fault between the boiler and control
panel.
Likely causes of the fault:
• Break in the cables for data communication between
the
boiler and control panel.
• The ignition spark is striking earth and interfering with
communication.
• Some other electrical device is interfering with communication.
CONTROL PANEL DISPLAYS:
Panel failure 1
• Fault in control panel.
Panel failure 2
• Fault in control panel.
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