Roy,
 
I got a service call recently on an SW4024 system that was having problems with appliances that were going bad. (Fortunately, I did not originally install the system.) The Trace AC meter indicated an AC output of 120 VAC. When I measured the AC output with a true RMS meter (Fluke 87) it was actually 140 VAC.
 
Trace tech support indicated that it was likely due to bad FETs or a sensing transformer. I sent the unit to Trace for repair.
 
Trrace received the unit and left word saying that there were some bad FETs, possibly due to an overvoltage on the AC input (a Kohler 6.5 kW generator in this system).
 
Pat Kiernan
Eco Electric, Inc.
PO Box 2389
Basalt, CO 81621-2389
tel/fax (970) 927-9270
e-mail: ecoelec@rof.net
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