Beretta POWER PLUS Installation Instruction page 70

PROBLEM
The boiler doesn't start
The boiler does not reach the
operating temperature
Thermal overload
on the heat generator
70
The heat generator reaches the
temperature but the central hea-
tingsystem is cold
The pump doesn't start
Frequent activation of
the system safety valve
CAUSE
No power supply
(the display is blank)
Boiler body dirty
Insufficient burner flow-rate
Boiler controller
Boiler controller
No water
Air in the system
Pump fault
Pump fault
System safety valve
Pressure in heating system circuit
System expansion vessel
SOLUTION
Check:
- electrical connections
- fuse
Clean combustion chamber
Check burner adjustment
Check correct operation
Check set temperature
Check correct operation
Check set temperature
Check electrical wiring
Check position of the probe sensors
Check vent valve
Check pressure in central hea-
ting circuit
Vent the system
Reset the pump
Replace the pump
Check the electrical connection-
sto the pump
Reset the pump
Replace the pump
Check the electrical connec-
tions to the pump
Check calibration or efficiency
Check charge pressure
Check pressure reducer
Check efficiency