Econcept 50 A
28
Domestic hot water sensor
faulty
• Sensor damaged or
wiring cut
• Check wiring or replace the
sensor
Flue gas sensor faulty
• Sensor damaged or
wiring cut
• Check wiring or replace the
sensor
External probe faulty
(if installed)
• Sensor damaged or
wiring short-circuited
• Check wiring or replace the
sensor
No communication between
main board and ignition devices
• Wiring cut or incorrect
between main board and
ignition devices
• Check the wiring and the
connections between the
boards
Fault
Possible cause
Solution
Microprocessor faulty
• Microprocessor operation
faulty
• Disconnect and restore the
electrical power supply. If the
problem persists check and/or
replace the main board
High flue gas temperature
3 x
in 24 hours =
• Flue partially blocked
or insufficient sized
• Check the efficiency of the flue,
the flue gas exhaust pipes and
the outlet terminal
Excessive central heating
outlet temperature
• Pump blocked
• Pump faulty
• Free the pump by removing the
cap and rotating the shaft with a
screwdriver
• Check or replace the condenser
or the pump
Excessive central heating
return temperature
• No system circulation
• Check system and pump
Outlet sensor faulty
• Sensor damaged or
wiring cut
• Check wiring or replace the
sensor
Return sensor faulty
• Sensor damaged or
wiring cut
• Check wiring or replace the
sensor
