DOMINA 80 E
56
8.10 General test and fault finding
Chart 1
Check electrical supply - C.H. water pressure and frost protection
Is LED1 “
” light on?
Put main switch to on
CH Selector to
Summer “
” position
D.H.W. taps closed
Is 230V present across
terminals X1-1 X1-2?
Check and if necessary
replace 2A fuse
YES
Is LED1 “
” light ON now?
Repair external
wiring fault
NO
NO
Replace
main board
NO
YES
Is LED5 “ ” light on?
bar
YES
Water pressure
is not set
between
1 - 1,5 bar?
YES
Set pressure to
1 - 1,5 bar
Check water
pressure
switch wiring
connection
NO
Does fan run at full speed?
NO
Go to CHART 2
NO
YES
Does CH Pump run?
If the boiler temperature
is less than 5
°
C
frost protection is activated
NO
Disconnect
CH flowtemp sensor
Has fan speed stopped?
Change main board
NO
YES
YES
Check and if
necessary
replace water
pressure switch
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