Carrier PC211 specifications Cutler-Hammer Solid-State Starter Troubleshooting Guide

Table 13 — Cutler-Hammer ® Solid-State Starter Troubleshooting Guide (Continued)

Problem	Probable Cause	Area of Correction
Overload relay trips	Incorrect heater coils (melting allow).	Check heater coil rating.
when starting.
	Loose heater coil.	Tighten heater coil.
	Long starting time (high inertia applications	Motor and starter thermal capabilities
	may require slow trip overload and oversize	must be evaluated before extending over-
	starter).	load trip times.
	Mechanical problems.	Check machinery for binding or exces-
		sive loading.
	Single phasing.	See ‘‘Starter or motor is noisy or vibrates
		when starting’’ symptom in troubleshoot-
		ing table.
	Excessive starting time (current limit may	Increase current limit setting clockwise.
	be set too low).
Overload relay trips	Incorrect heater coils (melting alloy).	Check heater coil rating.
when running.
	Mechanical problems.	Check machinery for binding or exces-
		sive loading.
	Single phasing.	See ‘‘Starter or motor is noisy or vibrates
		when starting’’ problem in troubleshooting
		table.
Heatsink overtempera-	Excessive current.	Check motor current draw.
ture switch opens.
	Defective heatsink, fan.	Check that all fans are rotating freely.
Erratic operation.	Loose connections.	Check all connections.

Legend

CCW — Counter Clockwise

CFR — Current Feedback Resistor

STR — Shunt Trip Relay