Flowserve VCT Manual do Utilizador descarregar pdf (Página 18)

USER INSTRUCTIONS APM, APMA and APH MX0301 - 07/03

Page 18 of 32

7 FAULTS; CAUSES AND REMEDIES

Trouble Cause Remedy

Insufficient Capacity Speed to low Check power supply to motor for

correct voltage.

Wrong rotation Reconnect motor leads

Foreign material in impeller,

casing, diffusion vanes, and/or

discharge head nozzle

Dismantle pump and remove any

foreign material

Mechanical defects:

Impeller damaged.

Share impeller key.

Dismantle pump and check

Insufficient supply of water to be

pumped

Determine proper level of water in

sump and proper pump

submergence.

Pump vibrates Loose mounting or coupling

bolts.

Broken or worn pieces

Tighten bolts

Inspect and replace same

Coupling misalignment Check alignment and correct

Cavitation Determine proper level of water in

sump and proper pump

submergence

Foreign material in impeller

causing unbalance.

Dismantle pump and remove

foreign material.

Mechanical defects:

Shaft bent.

Bearing worn.

Dismantle pump and replace part

or parts causing vibration

Pump overloads driver Speed to high Check power supply for correct

frequency

Pump bearing Seize or rotating

element binds

Check rotor setting. Dismantle

pump and replace parts causing

rubbing, seizures or binding.

Pump stops abruptly Pump binding at running fits Dismantle pump and correct

Stuffing box overheats Stuffing box packed too tight Repack stuffing box with new

packing per “Stuffing Box

Packing” instructions.

Insufficient Leakage in packing Loosen gland nuts and retighten

finger tight or until proper leakage

is obtained

Excessive Gland

Leakage

Packing not seated Gland not tighten evenly loosen

nuts and tighten evenly. (see

“Stuffing Box Packing”

instructions)

Worn Packing Replace packing

Pump is noisy Cavitation Determine proper level of water in

sump and proper pump

submergence

Loose parts Tighten or replace defective parts

Noise in driver Check driver IOM manual

Refer to driver manufacturer´s instruction manual for trouble shooting of driver

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