Re: [A/S] Digest Number 563

[Ken Hoehn <khoehn@xxxxxxxx>]

Jack:

When you measure the 'volts available', is that measured under load (the 
trailer plugged in and the AC running), or just open circuit?  Open 
circuit measurement of voltage is a complete waste of time; it
means absolutely nothing.  You must measure under load.

How long of a cable are you using?  Are you extending the built in A/S 
cable, and if so, with what gauge of cable?

I will say, however, that your current reading of just less than 15 amps 
is right where it should be.  It really makes me want to look for air 
flow or refrigeration problems.

I assume you have cleaned the fins in both the evaporator (inside) and 
condensing unit (outside), and that air flow is good.

I would look for, in order:

Low voltage under load
Dust buildup in coils  (not an issue, I assume)
Slipping fan blades
Fan motor running too slow (you ARE making these measurements on HIGH 
FAN, right?)
Low refrigerant level
Clogged filter/dryer
Debris in the air conditioner shroud.

Let us know!

Ken