Service & Maintenance / Extra Edition

Troubleshooting Challenge: A Preventive Maintenance Check on a Heat Pump

July 8, 2013
Trans

In this month’s troubleshooting situation, the customer hasn’t called because their HVAC system has stopped cooling. You’re there because they’ve requested a preventive maintenance check of the five-year-old equipment to determine if there are any potential problems that would affect the system performance in the future.

In addition to checking temperature splits and airflow, you are also checking the condition of the system’s electrical components. In the process of checking the dual run capacitor (see the partial diagram in Figure 1), you use your digital ammeter while the compressor is operating to make tests that show the following results:

• When testing the current draw of the blue wire leading from the H terminal on the capacitor to the start winding, your reading is 36.5 amps.

• When testing the current draw of the yellow wire leading to the run winding and the black wire leading to the common terminal of the compressor together, your reading is 34.1 amps.

Your troubleshooting question: What is the next step you need to take in repairing this equipment?

Compare your answer with ours by clicking on the PDF link below.

Publication date: 7/8/2013

PDF - July Troubleshooting Answer

For information on Jim Johnson’s HVACR technician training DVDs, go to www.technicaltrainingassoc.com/HVACRVideoStart.htm.

Want more HVAC industry news and information? Join The NEWS on Facebook, Twitter, and LinkedIn today!

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

Recent Articles by Jim Johnson

You must login or register in order to post a comment.

Multimedia

Videos

Image Galleries

2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

Podcasts

NEWSMakers: Rajan Rajendran

Rajan Rajendran, newly appointed director of the Emerson Innovation Center, talks about the new $35 million facility and how it will function on the University of Dayton campus. Posted on Aug. 29.

More Podcasts

ACHRNEWS

NEWS 08-25-14 cover

2014 August 25

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

Prohibiting HFCs

EPA is proposing a rule that would prohibit some HFCs in select refrigeration applications. Do you agree with this move?
View Results Poll Archive

HVACR INDUSTRY STORE

plumbing-hvac.gif
2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research

 

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

DON'T MISS A THING

Magazine image
 
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.

STAY CONNECTED

facebook icontwitter iconyoutube iconLinkedIn i con