Watson-Marlow SPS - Manual (Page 33)

MasoSine SPS sinusoidal pumps User Manual 33
Error Cause Remedy
Pump does
not draw in
Direction of rotation not correct Check direction of rotation
No wetting liquid in pump Fill pump with liquid
Screw fastening not tight Check screw fastening
Suction pipe too long Adapt suction pipe
Suction pipe too narrow Adapt suction pipe
Shaft seal leaking Check all seals for damage
Wearing parts worn Replace wearing parts
Motor speed not correct Measure and regulate speed
Gate and gate guide wrongly
positioned Check position (see 13.2
Changing rotation direction)
Pump does
not deliver
Direction of rotation not correct Check direction of rotation
Suction and pressure pipe
confused
Check pipe system
Motor speed not correct
Check pump speed against
performance curves—see your
purchase order
Wearing parts worn Replace wearing parts
Gate and gate guide wrongly
positioned Check position (see 13.2
Changing rotation direction)
Inserted gate valve closed Check pipe system
Pump is
noisy
Noises from the drive Consult manufacturer
Noises from the pump Consult manufacturer
Suction pipe too small
(cavitation) Shorten suction pipe or increase
diameter, reduce speed
Knocking noises from the
pumphead Check for gate valve wear and
replace if necessary
Noises from power frame
Fill oil, change tapered roller
bearings
Coupling not aligned
Align coupling correctly. See 11
Installation.
Pump leaks
Sealing system is leaking
Change seal faces,
static / dynamic or lip seals
O-ring seal leaking Replace O-ring
Lip seal ring on the power
frame leaking, oil escapes Dismantle power frame, replace
lip seals
Pump leaks
at front
housing
Housing seal not installed or
wrongly installed Install housing O-ring correctly
or replace
Housing seal defective
Install housing O-ring correctly
or replace
Pump is
blocked
Foreign body in the pump
Remove foreign body, examine
pump for damage
Power supply interrupted
Check electrical installation and
fuses, check drive
Defect in the drive
Separate the coupling and turn
the pump by hand to confirm
20 Troubleshooting