salmson MULTI-VE 2G Instructions De Montage Et De Mise En Service page 29

ENGLISH
Other defects, not detected by the converter, due to the pump.
CAUTION !
Before any operation, switch off the pump(s).
If the liquid is toxic, corrosive or dangerous for human being,
SALMSON or the qualified person in charge of the repairing
must be informed. In this case, clean the pump to ensure a
complete safety to the repairing man.
INCIDENTS
8.1 THE PUMP IS a)The pump does not run
RUNNING
BUT NO DELIVERY. b)The internal parts are
c)Suction pipes are obstructed :
d)Air in suction pipes :
e)Suction pressure is too low,
8.2 THE PUMP a)Loose on its foundation :
IS VIBRATING. b)Particles obstructing the pump :
c)Difficult rotation of the pump :
8.3 NO SUFFICIENT a) The motor speed is
PRESSURE FOR
THE PUMP. b)The motor is defective :
c)Bad filling of the pump :
d)The drain-priming plug is
8.4 THE FLOW a)The suction head (Ha) is not
IS IRREGULAR.
b)The suction pipe has a lower
c)The strainer and the suction
d)In mode 2, the pressure sensor
8.5 IN MODE 2, a)The non-return valve is not tight :
THE PUMP DON'T b)The non-return valve is not
STOP IF THE FLOW
IS ZERO. c)The tank has low capacity
CAUSES
quickly enough :
obstructed by particles :
it causes generally
cavitation noise. :
not high enough :
not fully tightened :
respected :
diameter than the one
of the pump :
pipe are partially obstructed :
is not adequate :
adequate :
due to installation :
a) Check the adequate adjustment of the requirement (conformity to the required
points).
b) Let dismantle the pump and clean it.
c) Clean all the pipes.
d) Check tightness of the whole pipe up to the pump and make it tight.
e) Too high losses of load on suction or suction head is too high
(check the NPSH of the pump installed and of the installation).
a) Check and tighten completely the nuts of the stud bolts.
b) Have the pump dismantled and clean it.
c) Check the pump turns freely without abnormal sticking.
a) Check if the set value is correctly adjusted.
b) Replace it.
c) Open the venting device and vent until there are no more air bubbles.
d) Check it and screw it again.
a) Study again the installation conditions and the recommendations described
in this instruction.
b) The suction pipe must have at least the same diameter as the suction pump
port.
c) Remove and clean.
d) Put a sensor with conforming pressure scale and accuracy
(see chapter 4.4).
a) Clean it or change it.
b) Replace it by an adequate non-return valve.
c) Change it or add an other one on the installation.
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REMEDIES