Fault Codes; Fault Memory - Vaillant TURBOmax Plus SERIES Instructions For Installation And Servicing

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.
Display
Flow-NTC:
- NTC broken
F.00 - NTC cable broken
- Defective connection at NTC
- Defective connection at electronics
Return-NTC:
- NTC broken
F.01 - NTC cable broken
- Defective connection at NTC
- Defective connection at electronics
F.10 Short circuit - flow-NTC (< 130 °C)
F.11 Short circuit - return-NTC (< 130 °C)
F.20 Over heat cut off activated
F.22 Low water or no water in appliance
F.27 no demand to gas valve
F.28 Boiler goes to lock out
F.29 Flame extinguished re-ignition unsuccessful
F.42 Faulty cable loom
F.43 Faulty cable loom
F.60 to F.67 Irreversible electronic system malfunction
Table St.4: Fault codes

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.
Indication
FAULT FINDING
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.
Flow-NTC cable defective/broken NTC faulty
Return-NTC cable defective/broken NTC faulty
NTC- plug shorted to casing
NTC defective
NTC- plug shorted to casing
NTC defective
Maximum temperature exceeded
No water in system
Pump defective
Pump lead defective
Electronic board defective
Gas valve defective
No gas
Insufficient gas
Incorrect gas valve adjustment
Electrode defective
Ignition lead defect
Electronic igniter defective
Gas supply absent or insufficient
Faulty or incorrect loom fitted
Faulty or incorrect loom fitted
Electronic system defective
Cause
77