77
FAULT FINDING
Fault codes
Fault codes take priority over all other
display functions in the event of a
system fault occurring.
If multiple faults occur, the
corresponding fault codes are
displayed alternately for about two
seconds each.
Fault memory
The fault memory stores details of the
ten most recent faults.
● Press the „i“ and „-“ buttons
simultaneously.
● Use the „+“ button to scroll back
through the list of memorised
errors.
To cancel fault error memory display
mode, proceed as follows:
● Press the „i“ button below the
display.
or
● Do not touch any key for about
four minutes. The display will now
revert back to showing the current
flow temperature.
Display Indication Cause
F.00
Flow-NTC:
- NTC broken
- NTC cable broken
- Defective connection at NTC
- Defective connection at electronics
Flow-NTC cable defective/broken NTC faulty
F.01
Return-NTC:
- NTC broken
- NTC cable broken
- Defective connection at NTC
- Defective connection at electronics
Return-NTC cable defective/broken NTC faulty
F.11 Short circuit - return-NTC (< 130 °C)
NTC- plug shorted to casing
NTC defective
F.10 Short circuit - flow-NTC (< 130 °C)
NTC- plug shorted to casing
NTC defective
F.42 Faulty cable loom Faulty or incorrect loom fitted
F.43 Faulty cable loom Faulty or incorrect loom fitted
F.20 Over heat cut off activated Maximum temperature exceeded
F.22 Low water or no water in appliance
No water in system
Pump defective
Pump lead defective
F.27 no demand to gas valve
Electronic board defective
Gas valve defective
F.28 Boiler goes to lock out
No gas
Insufficient gas
Incorrect gas valve adjustment
Electrode defective
Ignition lead defect
Electronic igniter defective
F.29 Flame extinguished re-ignition unsuccessful Gas supply absent or insufficient
F.60 to F.67 Irreversible electronic system malfunction Electronic system defective
Table St.4: Fault codes
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