Flowserve ERPN-M - Manual (Page 33)

ERPN-M USER INSTRUCTIONS ENGLISH 02-08
Page 33 of 37
FAULT SYMPTOM
Pump overheats and seizes
⇓ ⇓ Bearings have short life
⇓ ⇓ Pump vibrates or is noisy
⇓ ⇓ Magnetic coupling has short life
⇓ ⇓ Magnetic coupling leaks excessively
⇓ ⇓ Pump requires excessive power
⇓ ⇓ Pump loses prime after starting
⇓ ⇓ Insufficient pressure developed
⇓ ⇓ Insufficient capacity delivered
⇓ ⇓ Pump does not deliver liquid
⇓ ⇓ PROBABLE CAUSES POSSIBLE REMEDIES
z z z Incorrect type of magnetic coupling for
operating conditions.
Consult Flowserve
z z z z z
Shaft running off centre because of worn
bearings or misalignment.
Check misalignment and correct if necessary.
If alignment satisfactotry check bearings for
excessive wear
z z z z z Impeller out of balance resulting in vibration. Check and consult Flowserve
z z z Abrasive solids in liquid pumped. Check and consult Flowserve
z z
Magnetic coupling was run dry.
Check mechanical seal condition and source
of dry running and repair
z z Internal misalignment due to improper repairs
causing impeller to rub.
Check method of assembly, possible damage
or state of cleanliness during assembly
z z z Excessive thrust caused by a mechanical
failure inside the pump.
Check wear condition of Impeller, its
clearances and liquid passages
z z Excessive grease in ball bearings. Check method of regreasing
z z
Lack of lubrication for bearings.
Check hours run since last change of
lubricant, the schedule and its basis
z z
Improper installation of bearings
Check method of assembly, possible damage
or state of cleanliness during assembly and
type of bearing used
z z
Damaged bearings due to contamination.
Check contamination source and replace
damaged bearings
C. ELECTRICAL TROUBLES
z z z z Wrong direction of rotation. Reverse 2 phases on motor terminal box
z z z Motor running too slow, Check motor terminal box connections
9.0 CERTIFICATION
Certificates determined from the contract
requirements are provided with these instructions
where applicable. Examples are certificates for CE
marking, ATEX marking etc. If required, copies of
other certificates sent separately to the Purchaser
should be obtained from the Purchaser for retention
with these User Instructions.
10.0 OTHER RELEVANT
DOCUMENTATION AND MANUALS
10.1 Supplementary user instructions
Supplementary instructions determined from the
contract requirements for inclusion into user
Instructions such as for a driver, instrumentation,
controller, sub-driver, seals, sealant system, mounting
component etc are included in the Data Book. If
further copies of these are required they should be
obtained from the supplier for retention with these
user instructions.
Where any pre-printed set of user instructions are
used, and satisfactory quality can be maintained only
by avoiding copying these, they are included at the
end of these user instructions such as within a
standard clear polymer software protection envelope.
10.2 Change notes
If any changes, agreed with Flowserve Pump
Division, are made to the product after its supply, a
record of the details should be maintained with these
User Instructions.