Manitowoc

Diagnosing Start ComponentsIf the compressor attempts to start, or hums and tripsthe overload protector, check the start componentsbefore replacing the compressor.CAPACITORVisual evidence of capacitor failure can include abulged terminal end or a ruptured membrane. Do notassume a capacitor is good if no visual evidence ispresent. A good test is to install a known goodsubstitute capacitor. Use a capacitor tester whenchecking a suspect capacitor. Clip the bleed resistoroff the capacitor terminals before testing.RELAYThe relay has a set of contacts that connect anddisconnect the start capacitor from the compressorstart winding. The contacts on the relay are normallyopen. The relay senses the voltage generated by thestart winding and closes and then opens the contactsas the compressor motor starts. The contacts remainopen until the compressor is de-energized.Part Number 80-01111-9 7/10 171