NTC broken, NTC cable broken,
Defective connection at NTC, Defective
connection at electronics
NTC defective, short circuit in cable
harness, cable/casing short cut
NTC defective, short circuit in cable
harness, cable/casing short cut
NTC defective, short circuit in cable
harness, cable/casing short cut
Safety temperature limiter by NTC
activated
Flow-NTC not correctly
thermal-connected or defective;
appliance does not shut down
Too little water in the appliance, water
pressure sensor defective, cable to
pump or water sensor defective, pump
blocked or defective, pump output too
low
Water shortage, temperature difference
between flow and return NTC too large
Pump blocked or defective, pump
output too low, flow and return NTC
interchanged
Water shortage, temperature rise too
quick
Pump blocked, insufficient pump output,
air in appliance, water pressure too low
Incorrect sensing of flame
Appliance does not start: Attempts to
ignite during start failed
Faults in the gas supply such as:- - Gas
meter or gas pressure detector
defective - Air in gas- Gas flow pressure
too low - Fire protection tap has
disengaged Faults in the gas valve,
wrong gas setting, igniter (ignition
transformer, ignition cable, ignition plug)
defective, ionisation current stopped
(cable, electrode), faulty earthing in
appliance, electronics defective
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