Technical information

60
I
S
THERE STILL
A PROBLEM?
NORMAL
OPERATION
NONO
YESYES

FAULTS P
OSSIBILE CAUSES
1
1
22
33
44
55
66
77
88
99
C
D
rawing D.H.W:
W
hen you turn on a tap
b
urner switches off
D
rawing D.H.W:
r
adiators heat up in summer mode
Drawing D.H.W:
insufficient hot water
temperature
Drawing D.H.W:
noisy operation
D
ecrease/increase
heating circuit pressure
Repeated shutdowns
Repeated intervention of safety thermostat
When cold water tap turned off, the boiler
ignites
Insufficient radiator temperature
- check temperature probes
- faulty D.H.W. flow switch
- faulty 3-way valve
-
check temperature probes
- check gas pressures
-
check water flow rate

- primary heat exchanger faulty or
lime-scale deposits
-
low heating system water pressure
- check gas pressures
-
c
heck temperature probes
- check for leaks on the heating circuit
- faulty filling-loop
- expansion vessel faulty
- faulty detection electrodes
- check gas settings
- check flame detection electric circuit
- check temperature probes
- overheat thermostat not calibrated correctly
- air in primary water circuit
- drop in pressure in the water mains, with
consequent water hammer
- check C.H. temperature probe
- check by-pass
- check gas pressures
FC P006