Benchmark i-mini 30 Installation And Servicing page 54

73 ALTERNATING 'F' AND '2' - FLAME LOSS
Does the boiler ignite for a short
time and then extinguish?
YES
Check the detection electrode and
associated harness for: continuity,
visual condition and position (Refer
to Frame 46). Check if condensate
pipe is blocked. Check if flue is
blocked.
Replace as necessary
Check ignition electrode and
associated harness for: continuity,
visual condition and position.
(Refer to Frame 45) Are these
functioning correctly?
YES
Check siphon and condensate drain pipe
work for blockage and rectify if necessary.
Boiler now working OK?
* note: due to the wave form of the rectified voltage, the reading will vary depending on the type of meter used to measure the
value. In general terms a reading greater than 150V indicates that the correct voltage is supplied to the gas valve.
74 ALTERNATING 'F' AND '3' - FAN FAuLT
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?
54
Fault Finding
NO
Is the Gas Pressure available at
the Boiler Inlet (18 mbar)?
Is 215Vdc supply available at the
Gas Valve while the flame is on?
(* See note)
Check spark generator and
associated harness for: continuity
and visual condition. (Refer to
YES
Frame 47) Are these functioning
correctly?
NO
Replace Ignition Electrode and
associated harness as necessary
NO
Replace Gas Valve
YES
NO
YES
NO
YES
NO
NO
Rectify Wiring &
connections
NO
Replace PCB
YES
Replace Fan
i-mini -
Check gas supply and
rectify fault
Check wiring from gas
valve to PCB for continuity.
If the wiring is OK then
replace the PCB
Replace Spark Generator
and Harness as necessary.
Installation and Servicing