582156110-EN-indC-Pump-20F50 pH.docx 20/11/2020
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11.3 Diagnostic help / Troubleshooting guide
Troubleshooting
Before any intervention on a pump, it is imperative to carry out a
general procedure of decompression and drain.
In order to avoid the risk of personal injury, product injections, injuries
caused by moving parts or arcing, it is essential to follow the following
procedure before any intervention during system shutdown, assembly,
cleaning or changing the nozzle.
Lock the guns (valve, tap, etc.) to OFF.
Shut off the oil supply via the pressure relief valve to remove
residual air from the motor.
Unlock the gun (valve, tap ...).
Bring the gun (valve, tap ...) to a metal bucket to collect the
fluid. Hold it against the wall of this bucket to avoid interrupting
the continuity of the earthing (use the wire with stirrup to put
the metal bucket to earth).
Open the gun (valve, tap) to drain the network.
Lock the gun (valve, tap) to OFF.
Open the pump drain valve and collect the fluid in a well-
grounded metal bucket.
Leave that drain valve open during the whole period of the
operation.
Check the conformity of the wiring before intervention.
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