Observation:


CODE /DESCRIPTION CODE /DESCRIPTION
0bCirculation issuesF2Temperature limiter has responded
0CVoltage too lowF3Flame signal is already present at burner start
30Short circuit temperature sensorF4No flame signal is present
38 Open circuit temperature sensor F5Air pressure switch fault
b1 Communication faultF7Water pressure sensor fault
b5Internal fault F8Gas valve closes too late
E4Supply voltage fault F9Fan speed too low at burner start
E5Internal fault FAFan idle state not reached
E6Insufficient water pressure FdBurner control unit fault
F0Internal fault FEMain PCB fault
58Dip switches