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    • Samurai Appliance Repair Man

      Webinar Recordings Index Page   10/03/2017

      On-demand appliance repair training videos for Professional Appliantologist members Over 30 hours (and growing!) of original, high quality appliance training webinars developed and given by yours truly are at your fingertips, on topics you won't find anywhere else. Fill in those knowledge gaps, strengthen those areas of uncertainty, and boost your skills. Watch on mobile or desktop at your convenience whenever, wherever.  Ultra Short Primer on Basic Electricity, Circuits, Ohm's Law, and Schematic Reading (Length: 1:04:48) Basic Refrigerator Troubleshooting (Length: 1:10:45) Schematic Reading Workshop, 10/2015 (Length 1:19:08) Troubleshooting Strategies for Computer-Controlled Appliances (Length: 48:34) Semiconductors and PN Junctions (Length: 1:04:37) Appliance Temperature Sensing Devices & Technology (Length: 1:27:33) Voltage Measurements, Meters, Ghost Voltages, and Triac-controlled Neutrals (Length: 1:29:32) Troubleshooting with Tech Sheets, Part 1, 4/2016 (Length: 1:09:26) Troubleshooting with Tech Sheets, Part 2, 4/2016 (Length: 1:21:11) Tech Sheet Review, 4/9/2016: Bosch Speed Cooker, Amana Refrigerator, GE Glass Cooktop Range (Length: 1:22:58) Pulse Width Modulated (PWM) Switches used in Samsung Switched Mode Power Supplies (SMPS) (Length: 27:07) PWM Computer Cooling Fan in a Whirlpool Refrigerator (Length: 14:53) Understanding AC Split-phase Household Power Supplies (Length: 52:41) Troubleshooting a Samsung Electric Dryer without Disassembly using Live Tests and the Schematic (Length: 22:47) Troubleshooting a Bosch Dishwasher No-Heat Problem using the Schematic and Live Tests (Length: 15:38) Linear Motors and Linear Compressors (Length: 55:54) Bi-directional PSC Drive Motor Systems in Whirlpool VM Washers (Length: 56:52) Appliance Service Call Structure and Troubleshooting Strategies (Length: 1:00:16) The Ten Step Troubleshooting Tango and Workshop Exercises (Length: 1:35:39) Troubleshooting Ten-Step Tango Advanced Workshop (Length: 1:32:06) Ten-Step Tango Troubleshooting Workshop: Refrigerators (Length: 1:35:57) Whirlpool Duet Washer Schematic Analysis & Whirlpool Dryer Moisture Sensor System (Length: 1:03:04) Neutral Vs. Ground, Inverter Microwave, Digital Communications, Loading Down in DC loads, and more! (Length: 1:14:45) Gas Oven Service Call After a Parts Changing Monkey (Length: 36:04) AFCI and GFCI Circuit Protection Technology (Length: 41:26) Troubleshooting Samsung Refrigerators and more (Length: 1:29:58) 3-way Valves and Dual Evaporator Refrigerators (Length: 1:15:45) Split-Phase Compressors and PTC Start Devices (Length: 1:11:57) Gas Dryer Ignition Systems (Length: 53:50) Refrigerator Sealed System Thermodynamics, Part 1 (Length: 43:07) Refrigerator Sealed System Thermodynamics, Part 2 (Length 1:09:09) To access these webinars and all the other info-goodies here at Appliantology, become a Professional Appliantologist today. If you need cost-effective, time-flexible, state-of-the-art appliance technical training, check out the Master Samurai Tech Academy.
    • Samurai Appliance Repair Man

      [Webinar] Samurai's Sealed System Sleuthing Secrets - 10/30/2017 @7PM ET   10/19/2017

      Having laid some theoretical groundwork in the last webinar, we're going to focus on practical considerations in this one. That means quick n’ dirty techniques for diagnosing sealed system problem using strategically chosen and skillfully interpreted temperature measurements.  Review homework from the first session on 10-2-2017. Home refrigerator practical design and operating rules-of-thumb useful for troubleshooting Practical application exercises Troubleshooting scenario exercise Techniques for making system temperature measurements for determining superheat and subcooling Sealed system diagnosis homework assignment (to be reviewed in the next webinar in this series) If you attended the first webinar in this series, this is your payday! We’re going to apply that keen, penetrating insight you now possess into money- and time-saving shortcuts you can use to diagnose real-world refrigeration systems on service calls. See this calendar event for more details                   
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      [Webinar] Appliantology Workshop   10/22/2017

      Information is the name of the game in the appliance repair trade today. Appliantology is a powerful information tool for the professional appliance repair technician. But just like with any of the more capable tools in your tool bag, many of the more powerful features are hidden from you unless you "read the manual." Ugh! Who wants to do that? Well, this is one time when you don't have to! In this webinar, Team Samurai will personally walk you through the site and show you many of the useful and powerful features that even long-time users probably never knew existed.   
ApplianceDoctor

Heat Pump Not Cooling

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ApplianceDoctor

I have a customer called and said that their heat pump was not cooling. When I arrived I confirmed that there was a problem and unit was not cooling. I found everything was running even the compressor was running. I connected gauges to unit and found while compressor was running the high and low side pressures were equalized. This sounds to me like a bad or inefficient compressor. Is there any other thing or component could be bad in this unit that would cause the high and low pressure to be equalized while the compressor is running? Can anyone help me with this?

 

Thank You

 

ApplianceDoctor

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jumptrout

What refrigerant is in system?

What are the pressures?
What are LRA draw? (locked rotor)

What is LRA rating?
What are running amp draw?

What is running amp rating?

Is reversing valve actuating or stuck mid range?

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ApplianceDoctor

Refrigerant is R-22

Low side pressure 125 psig

High side pressure 125 or 130

LRA rating on compressor 48 amps

Unit is actually drawing while running 3.7 amps

Info. on label on unit is wore off could not see RLA

I can hear reversing valve clicking and energizing but

cant hear sound of gas switch.

Pressures are equalized or almost equalized.

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ahh-cool

I don't work on a lot of a/c heat pumps, no heat in south florida, but it sounds like your reversing valve is stuck mid position. try hitting it with the back of a screwdriver and try putting on the heat see if it moves and what are the pressures in heat?

Ahh-Cool A/C

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jumptrout

Running amps is too low.

Remove the compressor relay cover and check for a broken wire on compressor.

Verify the compressor capacitor is good.

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ahh-cool

what size unit? 3.7 amps is probably ok with no load.

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ApplianceDoctor

How would the compressor be running with a broken wire? Even if it had a bad capacitor, would the compressor still run as it is doing? I have run unit in heat and cool position and pressures are still equalized. Would a reversing valve stuck in mid position cause the pressures to be equalized?

 

Thanks

 

ApplianceDoctor

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ahh-cool

again I don't work on a lot of heat pumps. the compressor pumps refrigerant to the reversing valve and the valve determins which way the refrigerant goes. if it's stuck in mid position it willpump to the valve and bypass right back to the compressor

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ApplianceDoctor

Thanks guys for all your help.

 

ApplianceDoctor

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jb8103

Sounds like he's given up on us.

 

I don't believe the compressor is running. He's hearing a lot of racket from the outside unit fan, and assuming the compressor is making some of that racket.

 

Where in the circuit did he check for amp draw? Did he mistakenly get the fan L1? 3.7 A would be about right.

 

It is not likely that pressures would be equal on both sides if the compressor was actually running. 125 PSIG corresponds to about 100 degrees F ambient, typical of an outdoor coil in the summer sun. The indoor coil P/T would correspond if he's taking pressures at the outdoor coil.

 

I'd have to be standing there to say for sure, but I bet our man has a bad capacitor.

Edited by jb8103

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ahh-cool

the fan amp draw should be anywhere between .8 and 1.5. 3.7 is too much for a fan, unless the fan is bad

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