Bertolini IDB Series - Troubleshooting Guide; Common Pump Problems and Solutions

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V. 2.0
11. Problems and Solutions
Problem Causes Solution
The pump does not
achieve the desired
pressure
– One or more valves have worn
housings
– Suction hose with air pockets
or irregular bends
– Worn nozzles or of incorrect
diameter (See table)
– Filter blocked
– Check valves
– Check hose
– Check nozzles
– Clean filter, replace
cartridge
Oscillating pressure
gauge
– The pump is taking in air or
presence of air in circuit, air
not completely evacuated from
pump;
– One or more valves blocked
– Make the pump turn with
delivery open to evacuate
air;
– Clean or replace the valves
The water pumped out is
irregular, the pressure
gauge oscillates
The air chamber is under-inflated
Inflate the air chamber (see
table)
Flow capacity
decreasing, pump noisy.
Oil level is low
Re-fill oil up to half way up
tank with pump running
Oil coming out of
discharge
1 or more membranes broken
STOP THE PUMP
IMMEDIATELY!
Empty the pump of oil, remove
heads and replace the
damaged membranes. Re-fill
oil.
Oil changes colour,
becomes white
1 or more membranes broken
STOP THE PUMP
IMMEDIATELY!
Empty the pump of oil, remove
the heads and replace the
damaged membranes.
Re-fill with oil.