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