35
Alpha Pro Tec - Fault Finding
Fault code
0E
Fault description
Possible solutions
Check flame sensing electrode connections.
Check for a short circuit to the electrode or wire.
Check for correct gas supply (purged and valves open).
Check ignition electrode position and spark.
Check flame sensing electrode gap and connections.
Check all electrical connections.
Check for water ingress in connections.
Check all electrical connections.
Check for water ingress in connections.
Check DHW sensor connections and wires.
Check for water ingress in connections.
Check DHW sensor connections and damaged cables.
Check DHW sensor resistance values.
Check electrical socket connections.
Check external power supply.
Check the system for circulation and restrictions.
Check system pressure and gauge.
Check boiler flow meter and connections (Pro Tec 50).
Check pressure switch and connections (70, 90, 115).
Check flue sensor connections and wires.
Check for water ingress in connections.
Check flue sensor connections and wires.
Check flue sensor resistance values.
Check for poor or incorrect circulation.
Check for external circuit influences.
Check resistances of flow and return sensors.
Flame sensing fault.
Flame circuit fault.
Main PCB fault.
Main PCB fault.
DHW sensor short circuit.
DHW sensor out of range.
DHW sensor measures a temperature outside normal working range.
Low powers supply voltage.
Insufficient system flow - (Pro Tec 50 model only).
Insufficient system pressure - (Pro Tec 70, 90, 115 models).
Flue sensor short circuit.
Flue sensor out of range.
Flue sensor measures a temperature outside normal working range.
Flow and return sensor anomily detected.
The sensor shows an incorrect temperature value.
0E2
0E8
0E21
0E25
0E32
0E33
0E34
0E37
0E45
0E46
0E81
Fault code
0E
Fault description
Possible solutions
Check PCB is connected correctly.
Check for water ingress in connections.
Check electrical connections to display board.
Check for water ingress in connections.
Check for damage to buttons or LCD screen.
Check flow sensor connections and damaged wires.
Check flow sensor resistance values.
Check external sensor connections and wires.
Check for water ingress in connections.
Check boiler parameter settings are correct.
Check all electrical connections.
Check for correct parameter settings on PCB.
Check all electrical connections.
Check for correct parameter settings on PCB.
PCB compatability fault.
Display PCB fault.
Flow sensor out of range or short circuit.
Flow sensor measures a temperature outside normal working range.
External sensor fault.
Boiler PCB configuration error.
PCB communication error.
Fault detected in the link between the main PCB and the display board.
FE90
FE94
FE95
FE96
FE97
FE99