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Does the boiler ignite for a short
time and then extinguish?
Does the boiler ignite for a short time and then extinguish?Does the wiring from the
Fan to the PCB have secure connections at both ends and has not deteriorated? Does
the wiring have continuity?
Is there 230Vac at the Blue and Brown connections to the 3 way connection on the
Fan?
Replace the FAN
Check the detection electrode
and associated harness for:
continuity, visual condition and
position. Check if condensate
pipe is blocked. Check if flue is
blocked. Replace as necessary.
CHECK IGNITION FAULT FINDING
DOCUMENT
Is the Gas Pressure available at
the Boiler Inlet (18 mbar)?
Rectify Wiring & connections
Is 220V AC supply available at
the Gas Valve while the flame
is on?
Replace the PCB
Check ignition electrode and
associated harness for: continuity,
visual condition and position.
Are these functioning correctly?
Check siphon and condensate
drain pipe work for blockage and
rectify if necessary. Boiler now
working OK?
Check gas supply
Check wiring from gas valve to
PCB for continuity. If the wiring is
OK then replace the PCB
Replace Ignition Electrode and
associated harness as necessary
Replace Gas Valve Calibrate the
gas valve
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
FLAME LOSS
4.6. FAN FAULT
4.5. FLAME LOSS / FAN FAULT
Designation
Manufacturer
Type-model / Technical data
Release date
28.11.2017
Fault Finding; Flame Loss & Fan Fault
Warmhaus
Viwa 90-115-125-150
Rev. No:
0
Drw. No:
WH.17.726