Finish Thompson DB 11/15 Series - Manual (Page 19)

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Section VII - Troubleshooting
General Notes:
• Do not pump liquids containing ferrous metal fines.
• If magnets decouple, stop pump immediately. Operating the
pump with the magnets decoupled will eventually weaken
the magnets.
• Power monitors are required and must be used with all
ATEX certified pumps.
• Do not use mismatched drive magnet assemblies (differ-
ent number of magnets on inner and outer drive magnet
assemblies).
• Contact our Technical Service Department -
Phone: 1-800-888-3743
Email: [email protected]
if you have any questions regarding product operation
or repair.
• Air or gas in liquid
• Impeller diameter too small
• System head lower than anticipated
• Motors speed insufficient (too low) or motor rotation
incorrect (correct rotation when viewed from the fan end is
clockwise)
Loss of Prime
• Leak in suction piping
• Foot valve or suction opening not submerged enough
• Foot valve too small or leaking
• Air or gas in liquid
Insufficient Pressure
• Foreign matter in impeller
• Leaking valve. Suction lift too high or insufficient NPSHa
Excessive Power Consumption
• Head lower than rating
• Excessive flow
• Specific gravity or viscosity too high.
Vibration/Noise
• Loose magnet
• Drive magnet rubbing
• Pump cavitating from improper suction or feed
• Motor or piping not properly secured
• Foreign object in impeller
No or Insufficient Discharge
• Air leaks in suction piping
• Pump not primed
• System head higher than anticipated
• Closed valve
• Viscosity or specific gravity too high
• Motor too large for magnet coupling rating (magnets
uncoupled)
• Suction lift too high or insufficient NPSH
• Clogged suction line or impeller vanes
• Motor rotation incorrect (correct rotation when viewed
from the fan end is clockwise)
Section VIII - Warranty
Finish Thompson, Inc (manufacturer) warrants this pump product
to be free of defects in materials and workmanship for a period of
five years from date of purchase by original purchaser. If a war-
ranted defect, which is determined by manufacturer’s inspection,
occurs within this period, it will be repaired or replaced at the
manufacturer’s option, provided (1) the product is submitted with
proof of purchase date and (2) transportation charges are prepaid to
the manufacturer. Liability under this warranty is expressly limited
to repairing or replacing the product or parts thereof and is in lieu
of any other warranties, either expressed or implied. This warranty
does not apply to normal wear of the product or components. This
warranty does not apply to products or parts broken due to, in whole
or in part, accident, overload, abuse, chemical attack, tampering, or
alteration. The warranty does not apply to any other equipment used
or purchased in combination with this product. The manufacturer
accepts no responsibility for product damage or personal injuries
sustained when the product is modified in any way. If this warranty
does not apply, the purchaser shall bear all cost for labor, material
and transportation.
Manufacturer shall not be liable for incidental or consequential
damages including, but not limited to, process down time, trans-
portation costs, costs associated with replacement or substitution
products, labor costs, product installation or removal costs, or loss
of profit. In any and all events, manufacturer’s liability shall not
exceed the purchase price of the product and/or accessories.
Ordering Spare Parts
Spare parts can be ordered from your local distributor. Always refer
to the pump model to avoid error.
Part Number 107403 R12, 2/14/14
Order fax: 814-459-3460
Tech Service: 800-888-3743
Lit. ID No. FT09-1092