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TECHNICAL ASSISTANCE SERVICE
20 TROUBLESHOOTINg
SUPPLEMENTARY HEATING CIRCUIT
FAULT
The buffer tank functions incorrectly or
irregularly
SOLAR COLLECTOR CIRCUIT
FAULT
The buffer tank functions incorrectly or
irregularly
The storage cylinder loses a lot of heat
overnight
CAUSE
Flow rate too high
There are blockages or deposits in the
domestic hot water circuit
The pump is malfunctioning
The water temperature from the boiler is
too low
There is air in the primary circuit
CAUSE
There is air in the circuit
The flow rate is too low or too high
Pressure is too low
There is lime scale or sludge in the
cylinder
There is natural circulation to the
collectors
19
TECHNICAL ASSISTANCE SERVICE
SOLUTION
− Fit a pressure limiter
− Fit a flow reducer
− Check and clean as necessary
− Check the pump
− Check the temperature setting
− Bleed the circuit
SOLUTION
− Bleed the circuit
− Check the flow rate of the collector
circuit
− Check that circuit pressure is
approximately 3 bar when cold
− Check and clean as necessary
− Make sure that the non-return valve is
efficient and closes properly. Replace if
necessary
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