ProMinent Hydro/4 Operating Instructions Manual page 54

Troubleshooting
Tasks
Fault description
Pump fails to pressurise or
does not prime in despite full
stroke motion and bleeding
54
WARNING!
Risk of injury from the fan impeller
The fan impeller beneath motor's fan cowling can cause
severe injuries while it is turning.
–
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic components if
they are manipulated or opened due to pressure in the liquid
end and adjacent parts of the system.
–
–
Cause Remedy
The valves are dirty or Repair the valves - see chapter entitled
worn. "Repair".
The feed chemical has Install a suitable filter in the suction line.
particles larger than
0.3 mm.
Safety relief valve is Unscrew knurled screw in safety relief
open. valve.
Safety relief valve is Replace safety relief valve and remove
heavily worn as dis‐ blockage from discharge line
charge line is greatly
constricted.
Insufficient hydraulic oil Refill with hydraulic oil until oil inspection
in the power end. window is 1/3 covered - see "Diaphragm
change" in the chapter "Repair".
Indicating dial is set Set indicating dial - see "Calibrate
incorrectly. metering capacity"in the chapter "Repair".
The motor is wired 1. Check the mains voltage and mains fre‐
incorrectly. quency.
2. Wire the motor correctly.
The mains voltage has Eliminate the cause.
failed.
Operating diaphragm
n
ruptured and alarm has
not sounded.
n
The pump must only be connected to the mains voltage
with the fan cowling closed.
Disconnect the pump from the mains power supply and
ensure that it cannot be switched on again by unauthor‐
ised persons.
Depressurise the system before commencing any work
on hydraulic parts.
Replace multi-layer diaphragm imme‐
diately - see "Diaphragm change" in
the chapter "Repair".
Replace separating diaphragm of the
diaphragm rupture sensor- see
"Replacing the separating diaphragm,
diaphragm rupture sensor" in the
chapter "Repair".
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