Electronic Variable Displacement Compressor Diagnostic Tips | Pro Training PowerHour

In this month's Pro Training PowerHour, Pro Training Instructor Peter McArdle, discusses electronic variable displacement compressors. These are compressors where the pumping displacement, the actual pumping output of the compressor is completely computer controlled. We're finding there's a lot of misunderstanding and misdiagnosis associated with these compressors. Peter goes over electronic variable displacement compressor operation, diagnosing them, and some service tips.
Chapters:
0:00 Introduction
0:32 Topics
1:02 Electronic Variable Displacement Compressor
11:16 ECVD Compressor Types: Clutch vs. Clutchless
11:23 Positive Side Control ECV Circuit
11:42 Ground Side Control ECV Circuit
12:07 ECV Solenoid: Voltage and Current Waveform
12:54 Bi-directional Testing Options
20:51 Using a Dedicated Tool Can Simplify Diagnosis
21:09 TSB10/17/19 Compressor
24:28 Refrigerant Volume Flow Sensor Testing
25:39 Volume Flow Sensor Scope Pattern
27:46 Refrigerant Volume Flow Sensor Issue
29:09 Oil Quality Critical
29:38 Critical Service Difference: Lubrication Chemistry
30:03 Adding Oil to Compressor with Crankcase
30:06 Turn Compressor by Hand Before Start Up
30:50 Check Compressor Voltage Drop
31:53 Refrigerant News
Pro Training PowerHour is a free, live virtual technical series that features live demonstrations from Standard® Pro Trainers. Each session will provide you with a systems overview, diagnostic recommendations and installation tips.
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[@advancedleveldiagnostics]

Great class! I find on the Toyota compressor with the flow sensor code, is because the initial turn on voltage is below 3.8v so it flags an open circuit code. I put a little magnet on the sensor so it raises the voltage to 4v and the compressor starts up and it actually works, the voltage goes down when you Rev the engine. Unlike the Chinese sensors that just fix the voltage at 4.38v and it just maxes out the A/C.

[@mikefraser1990]

Fantastic info, thanks!

[@anthonynofi4871]

interesting session content, great presentation Peter.

[@chrisberry9681]

Phenomenal great job Peter and team.

[@user-bl9ze4kr6l]

Great class. Learned a lot.

[@user-bl9ze4kr6l]

excellent session.

[@righteousman8488]

Thanks for the lesson sir