dead Friedrich AC unit, Model KM18J30B-3 - Heating, Ventilation, and Air Conditioning (HVAC) - Do-It-Yourself Appliance Repair Help - ApplianceGuru.com: The Samurai Appliance Repair Forums

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dead Friedrich AC unit, Model KM18J30B-3

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Posted: Thu Sep 16th, 2010 12:04 am

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21^st Post

RegUS_PatOff
Fellow, Academy of Sublime Masters of Appliantology

Joined:	Sat Sep 24th, 2005
Location:	Milwaukee, Wisconsin USA
Posts:	16509
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RegUS_PatOff wrote: If the Compressor was bad, the Fan should still work

check the voltage at the 2-position Fan/Rocker Switch

center Terminal (Brown) to chassis (a good ground)

Test the voltage with the Switch in each position

If no voltage:

test for voltage at each of the outer 2 terminals

Grey to chassis (a good ground)

Purple to chassis (a good ground)

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Posted: Fri Apr 1st, 2011 04:29 pm

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22^nd Post

paulcats02

Joined:	Thu May 14th, 2009
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Posts:	46
Flavorite Brew:	Root Beer
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Haven't touched this unit for a while as it has been pretty cold out! :coolblast:

Anyway on a whim, I decide to measure the voltage at the outlet with a multi-meter; interestingly enough i found that the reading is questionable. Between the 2 hot pins measures low (102.7V AC) compared to the other rooms Air Conditioners outlets (they are 120V AC on the button) but between ground and either hot pin is 121V. :headscratch:

I guess could plug the suspect unit into one of the "other" outlets except that it is a big unit and weighs about 100lbs or so... so maybe I'll dig around for an extension cord with the 250V NEMA 6 type connectors to rule the outlet in or out as the problem.

And if it was, I will repeatedly kick myself in the butt... and consider starting drinking again! :gulp:

Last edited on Fri Apr 1st, 2011 04:44 pm by paulcats02

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Posted: Tue Apr 5th, 2011 01:51 pm

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23^rd Post

paulcats02

Joined:	Thu May 14th, 2009
Location:
Posts:	46
Flavorite Brew:	Root Beer
Status:	Offline

Problem solved, maybe a drink is in order; a change in fuse and now it works like a charm! the 2 bedroom AC's outlets are 120V so only require 1 20A fuse each but the living room is 220V so it has to have 2 20A fuses and there was a 15A and a 20A hence the low voltage. thanks for all the previous suggestions, etc. anyway if the unit ever breaks (which it will someday) i'll know my way around (somewhat)

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