Annovi Reverberi BHS 170, Instruction Manual

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English language Use and Installation
37
8 TROUBLESHOOTING
The information provided is intended to provide guidance how to deal with malfunctions which may occur
during use.
Some of these procedures may be carried out by skilled staff, while others have to be performed at specialised
service centres since they require the use of specific equipment as well as detailed knowledge of repair opera-
tions.
Problem Cause Remedy
The pump does not
prime properly.
Intake circuit not airtight.
Tighten, repair or replace hoses
and fittings as necessary.
Distributor switching lever on
“Pressure” setting.
Move distributor switching lever to
“By-pass” setting.
The pump does not require the
required pressure.
Seat and plate of intake and deliv-
ery valves worn.
Replace the worn valves.(1)
Nozzles worn or too large in
diameter.
Replace the worn nozzles.
Use nozzles of suitable diameter.
Restriction in intake circuit.
Remove the restriction from the
circuit.
Intake filter fouled. Clean the filter cartridge.
Pressure gauge needle wobbles,
pressure throbbing.
Intake circuit not
airtight.
Clean or replace the intake and
delivery valves. (1)
Residual air left inside
pump.
Discharge the air by opening a ball
valve/central unit connected to
the delivery side with the pump in
operation.
Valve plate stuck
to its seat.
Tighten, repair or replace hoses
and fittings as necessary.
Pressure accumulator deflated
Inflate accumulator to the correct
pressure.
Uneven flow of liquid to nozzles. Pressure accumulator deflated
Inflate accumulator to the correct
pressure.
Increase in noise and simultaneous
drop in oil level (pump cavitation).
Restriction in intake circuit.
Remove the restriction from the
circuit.
Intake filter fouled. Clean the filter cartridge.
Pump drawing in liquid from too
low a level.
See “Pump Intake Conditions”
section.
(1) Operations which must be carried out at an authorised service centre