Piusi MA Série Mode D'emploi page 66

R TROUBLESHOOTING
The following instructions are intended excluvively for authorised skilled maintenance
engineers. In event of abnormal behaviour and in orer to fix faults, please refer to
the following trobleshooting instructions.
WARNING
PROBLEM
The pump does not start
The pump runs but does
not pump
For more serious problems, we strongly oraccomend
that you contact the PIUSI SERVICE DEPARTMENT;
our engineers will provide you assistance as quickly
as possible.
POSSIBLE SOURCE
No air in the circuit.
Insufficient air pres-
sure.
Insufficient air flow
rate.
D a m a g e d c o n t r o l
valve.
Pump intake or deliv-
ery closed.
Pneumatic exchanger
damaged.
Broken diaphragm.
Pump stalled.
The balls do not close.
Intake too high.
Fluid is too viscous.
Intake side is obstructed.
ADVICE
Check circuit, valves and
connections.
Adjust pressure on the
relevant reducer.
Check that piping and
accessories have suita-
ble passage.
Check and replace.
Disconnect intake and
delivery hoses and
check if the pump starts.
Replace exchanger;
check whether the air
discharge is ob structed
by ice. If so, clear it. See
air supply paragraph.
Check if any air comes
out from the product de-
livery pipe. If so, replace
diaphragm.
Reset (page 56).
Disassemble the mani-
folds and clean the ball
seats or re place both
balls and their seats.
Reduce intake height.
Install larger piping es-
pecially on the intake
side and decrease the
pump cycles.
Check and clean.
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