71
Cause
Short circuit, flow temperature sensor/high limit safety
cut-out
Measures
Check the flow temperature sensor/high limit safety
cut-out.
Check sensor lead. Replace faulty component if nec-
essary.
Reset the appliance.
185
System characteristics
Burner in a fault state
Cause
Lead break, flow temperature sensor/high limit safety
cut-out
Measures
Check the flow temperature sensor/high limit safety
cut-out.
Check sensor lead. Replace faulty component if
required.
Reset the appliance.
299
System characteristics
Date/time wrong
Cause
Real-time clock fault
Measures
Check time and date and set if necessary.
Note
The setting can be performed via the software tool or
commissioning assistant.
346
System characteristics
Burner in a fault state
Cause
Ionisation current calibration error
Measures
■
Check the gas supply pressure.
■
Check gas solenoid valve inlet strainer for contami-
nation.
■
Check ionisation electrode for contamination.
■
Check the flue system. Remove flue gas recircula-
tion if necessary.
■
Check the condensate drain (condensate backup).
Reset the appliance.
347
System characteristics
Burner in a fault state
Cause
Flue gas recirculation
Measures
Remove flue gas recirculation. Check entire flue gas
path for the following:
■
Flue gas back pressure caused by water pocket (if
flue system fall is insufficient), constriction, blockage.
■
Repair flue system if necessary.
■
Reset the appliance.
Troubleshooting
Fault messages (cont.)
6221465
Diagnosis
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