IBO OHI - Starting the Pump; Troubleshooting

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Before starting the pump, make sure the system is full of water and pressure is at the pump inlet
has reached the minimum inlet pressure as required.
The pump should be installed so that the pump shaft is in a horizontal position.
To avoid damage to the pump bearing due to cavitation, the following minimum
pressure must be maintained at the pump inlet:
Starting the pump
Troubleshooting
Water temperature [°C] <75°C 90°C 95°C
Minimum input pressure
0.05bar 0.28bar 0,5bar
0,5 m of HO column 2,8 m of HO column 5 m of HO column
ISSUE: POSSIBLE CAUSE: SOLUTION:
The pump does not start
Installation fuse blown Check the cause, replace the fuse
The miniature circuit breaker is o Activate the circuit breaker
Pump damaged Replace the pump
Pump impeller blocked Unlock the rotor
The system is loud
Air in the system Carry out bleeding
Inlet pressure too low - cavitation
Increase the inlet pressure at the inlet
to pump
The pump is loud
There is air in the pump Bleed the pump
The suction pressure is too low
Increase the suction pressure or check
air pressure in the tank equalizing