I.B. 3A74792H08 Page 45
Effective 09/2014
6-13 TROUBLESHOOTING CHART (Continued Next Page)
SYMPTOM INSPECTION AREA PROBABLE DEFECTS
Fails To Close
• Closing Spring charged but
circuit breaker does not close
• No Closing Sound
(Close Coil does
not pick up)
• Control Power
(Fuse blown or switch off)
• Secondary Disconnects
• Anti-Pump Relay
(Y relay N. C. contact open or
burned or relay picks up)
• Close Coil
(Open or burned)
• Latch Check Switch
(Contact open-bad switch or
trip bar not reset)
• Auxiliary Switch
(b contact open or burned)
• Motor Cut-off
(Contacts open or burned)
• Trip Coil Assembly
(Clapper fails to reset)
• Closing Sound
but no close
• Pole Shaft
(Not open fully)
• Trip Latch Reset Spring
(Damaged or Missing)
• Trip Bar-D Shaft
(Fails to remain reset)
• Trip Latch-Hatchet
(Fails to remain reset)
• Trip Floor Tripper
(Fails to remain reset)
• Close Latch
(Binding)
• Close Latch Roller
(Binding)
• Trip Circuit Energized
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