14
The supply pressure is too high
The flow rate is too high
Blockages or deposits
are present
The pump is malfunctioning
Little hot water is produced
Fit a pressure limiter
Fit a flow reducer
Check and clean as necessary
Check the pump
Troubleshooting
The water temperature is low in
the heat generator or solar heating
system
The storage cylinder thermostat is
set badly
The pump is malfunctioning
There is lime scale or sludge in
the cylinder
Water temperature is low
Check the setting and condition
of the thermostat
Check the setting and condition
of the thermostat
Check the pump
Check and clean as necessary
There is air in the primary circuit
Bleed the circuit
The water temperature in the heat
generator or solar heating
system is low
The filling pump is malfunctioning
There is air in the circuit
Replenishment times are too
long
Check the setting of the thermo-
stat
Check the pump
Bleed the circuit
CAUSE
CORRECTIVE ACTION
PROBLEM
