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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Got a Carlyle scroll with a head shake on start up it broke

Customer Question

got a Carlyle scroll with a head shake on start up it broke a weld?
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: about a week
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: its a second stage compressor in the unit
JA: Did you double-check the thermostat? And what about the unit's filters?
Customer: not the stat but filters are clean
Submitted: 8 months ago.
Category: HVAC
Expert:  Phil replied 8 months ago.

Hello, head shake with scroll compressors is almost unheard of.

We will need to do a few tests.

First I want to tell you what will cause head shake in a scroll compressor, that is a gross over charge of refrigerant. Can you tell me when the system was last serviced or repaired... and how it worked before that service or repair.

Next you will need a clamp around amp meter to measure the full load amperage at the two wires running to the compressor from the contactor... if the amp draw is very low, compared to the name plate amps we know that scroll rotor is broken most likely.

Beyond that we will need refrigeration service gauges.

Let me know what you can,