salmson SIL 425, Installation And Starting Instructions

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English
44 Pompes Salmson 05/2011
10.1 Mechanical faults
Fault Cause Remedy
Pump does not start or stops working Pump blocked Disconnect motor from power supply,
remove cause of blockage; if motor
blocked, overhaul/replace motor/plugs
Incorrectly installed mechanical seal Remove the mechanical seal; replace
defective parts; install mechanical seal in
accordance to the instructions
Cable terminal loose Check/tighten all terminal screws
Fuses faulty Check fuses; replace defective fuses
Motor damaged Contact customer service
Motor protection switch has trig-
gered Throttle the pump to the rated volume
flow on the pressure side
Motor protection switch set incor-
rectly Set the motor protection switch to the
correct nominal current as shown on the
rating plate.
Motor protection switch affected by
excessive ambient temperature Move the motor protection switch or pro-
tect it using heat insulation
PTC thermistor tripping unit has trig-
gered Check the motor and fan cover for con-
taminants and clean if necessary, check
ambient temperature and ensure an
ambient temperature of
≤ 40°C by forced
venting if necessary
Pump is running at reduced output Incorrect direction of rotation Check direction of rotation, change if
necessary
Stop valve on pressure side throttled Slowly open the stop valve
Speed too slow
Remedy incorrect terminal bridging
(Y instead of
Δ )
Air in the suction line Seal leaks at the flanges; bleed pump
Pump is making noise Cavitation due to insufficient supply
pressure Increase supply pressure, observe mini-
mum pressure at the suction port, check
slide valve and filter on the suction side
and clean if necessary
Incorrectly installed mechanical seal Remove the mechanical seal; replace
defective parts; install mechanical seal in
accordance to the instructions
Motor has bearing damage Have the pump checked by Salmson cus-
tomer service or a specialised service
centre and serviced if necessary
Impeller grinding Check faces and centrings and between
lanterns and motor and lantern and pump
housing; clean if necessary.
Check the coupling and shaft sliding sur-
faces. If necessary, clean and lightly oil
them.