Technical data

39
4000123924-2
F30E/F35E ONLY
18 Fault Finding
FAULT: NO HEATING
Are the external heating
controls calling for heat?
Is the polarity correct?
Rectify fault on external controls
.
NO
Rectify, check the 230V
controls board.
NO
Faulty main PCB.
NO
YES
Connect 1 and 2 on J10,
does boiler fire in central heating?
YES
Faulty 230V controls board.
YES
FAULT: NO HOT WATER, BUT THE HEATING IS WORKING
Is the water pressure greater
than 0.5 bar ?
NO
Insufficient water pressure.
The appliance will not operate.
Find out why the pressure is so low.
Is the water flow rate greater
than 1.7l/min. (threshold figure).
NO
Check the cold water inlet filter
for dirt. Is the cold water tap fully open
?
Check the heat exchanger for scaling.
YES
Is flow detector operating ?
NO
Change or clean it.
YES
Check the connectors on the
flow sensor and the control board (PCB).
If the fault persists, fit a relplacement
control board (PCB).
YES