Ferroli F24 Installation, Servicing And User Instructions Manual page 39

Ferroli F24
8.09 General test and fault fi nding
Check electrical supply - C.H. water pressure and frost protection
Chek the following carefully before starting
• Gas supply is turned on, is adequate and purged
• Electricity supply is turned on
• Polarity is correct
• CH pressure is set between 1 - 1,5 bar
• CH pump spins freely
YES
Water pressure
YES
is not set
between
1 - 1,5 bar?
NO
Set pressure to
Check water
pressure
switch wiring
connection
Check and if
necessary
replace water
pressure switch
YES
D.H.W. taps closed
CH Selector to
Summer " " position
Put main switch to on
Is LED5 on?
YES
Is LED5 flashing?
NO
1 - 1,5 bar
Does fan run at full speed?
YES
Does CH Pump run?
YES
If the boiler temperature
is less than 5°C
frost protection is activated
Disconnect
CH flowtemp sensor
Has fan speed stopped?
NO
Change main board
Chart 1
Is 230V present across
NO
terminals X1-1 X1-2?
YES
Check and if necessary
replace 2A fuse
Is LED5 ON now?
YES
NO
Go to CHART 2
NO
NO
Repair external
wiring fault
NO
Replace
main board
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