User`s manual

30
IS
THERE STILL
A PROBLEM?
NORMAL
OPERATION
NONO
YESYES

F
AULTS
POSSIBLE CAUSES
1
1
22
33
4
4
A
D
rawing D.H.W:
i
nsufficient hot water
temperature
Drawing D.H.W:
noisy operation
Repeated shutdowns
When cold water tap turned off, the water
heater ignites
-
check gas pressures
-
check water flow rate
-
check heat exchanger
- heat exchanger faulty or lime-scale deposits
-
low heating system water pressure
-
check gas pressures
-
faulty detection electrodes
-
check gas settings
- check flame detection electric circuit
-
drop in pressure in the water mains, with
consequent water hammer
FC P011