10 Faults, causes and rectification
Pump doesn’t run when power is switched on :
■Check solar control unit for correct settings and tight wire connections.
■Check fuses.
■Check pump voltage, refer to the pump rating plate for requirements.
Motor blocked:
■Close
■Fully unscrew bleed screw and check ease of movement of pump rotor by turning the slotted shaft end with a screwdriver; use force to turn if necessary.
Pump Noise:
■In the event of cavitation caused by insufficient inlet pressure, increase primary system pressure within allowable range.
■Check speed setting.
If the fault cannot be rectified, please contact your nearest
Lochinvar/TiSUN customer service representative.
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