TD03309002E For more information visit:
www.EatonElectrical.com
Technical Data
Effective: January 2005 Page
7
Storage, Handling,
Installation and
Maintenance of Controllers
Table 3. Contactor Troubleshooting Chart, Continued
Defect Cause Remedy
Manual Starters
Failure to Operate
Mechanically
Worn or broken mechanical parts Replace unit.
Welded contacts due to misapplication or
other abnormal cause
Replace contacts and use correct application.
Nuisance Tripping Incorrect heater Check heater table.
Manual Pilot Devices
Button Mechanically
Inoperable
Shaft binding due to dirt or residue Check, clean, and clear — replace as required.
Contact block spring broken Replace contact block.
Poor Continuity Contaminated contacts and corrosion Replace contact block and protect unit from environment.
Excessive Electrical
Wear
Excessive jogging Install larger device or caution operator.
Weak contact pressure Replace contact block.
Short circuit Remove fault and check to be sure fuse or breaker size is correct.
Sustained overload Install larger device.
Circuits, Supports
Discoloring
Loose connections Tighten hardware, or replace contact block.
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