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That sounds like a good idea. Have to go out-of-country for awhile but will do that when I return. At least I have a "known-good" unit as a source for troubleshooting parts. I do need to study the TM to fully understand and be able to identify any parts that I would remove & substitute. Like...

That would be my wish, but I have another MEP4 right next to this one (also rewired for single phase) & the L1/L3 voltages are identical. I've about decided to surrender and just run this one the way it is. Since I can adjust the voltage for one to be about 124 & the other to be about 116--or...

Did a quick test right before dark today with (9) heaters. Didn't record the gauge board meters since I'm trying to focus on the voltage differential between L1 & L3. First I believe in the last set of readings I must have reversed the data from L1 to L3. I mistakenly listed the L1 as L3...

Reply comments--I had previously checked all connections inside the cubicle, but will now connect a separate ground lead to each of the "offending" meters. The main copper ground rod & copper wire is securely connected and driven into the earth. Previously had checked terminal connections at...

Conducted another test this afternoon--data & results as follows: Load: QTY (6) 1.5 KW heaters distributed between L1 & L3 Board readings: L1-- 75% L2-- 75% % Power-- 75-80% (needle fluctuating) Frequency-- 60hz (+/- 0.1hz needle fluctuating a little)...

Roger that...looking at the TM now...thanks....

Don't think I ever answered this question, but I can detect no engine RPM changes--seems steady as she goes....

Will check these connections next weekend. Off the grid for three days this week. I did notice the amber indicator light housing was quite hot last time I checked it, but didn't think to check if the toggle switch was also hot. Any other components inside the control box worth checking...

I might be able to but the breaker panel is pretty crowded. We decided the other day that at least 2 of the heaters are probably only pulling half their rating. Might even be 3 of them...the old time milkhouse type and the wide ones that you can see the big zig-zag tungsten wires glowing...

Matt, Completed two load tests this afternoon....results of 2nd test as follows (video to follow): Load: QTY (9) 1500W heaters, with one connected to the convenience outlet. 4 each to L1 & 4 each to L3 Voltage readings: L1--123v L3--113.3v Amp readings (via EXTECH MA220): L1--49.3...

Morning Matt, Thanks for the reply. (I think we're the only two on here that work on these models maybe??) I just did a connection check inside the unit and found all connections tight and just about to run another test. Also, once running, I'll try to adjust the meters and also will check...

Got into the TM last night and found a little info related to AC voltage fluctuations but nothing specific about ammeter fluctuations though they are connected. As to possible causes for voltage fluctuations the following causes were listed: 1. Loose electrical connections (didn't say...

Conducted two load tests yesterday evening on 2 different MEP004As...On unit 1 I've completed the single phase mod, including the CT resistor installation; on unit 2 I've completed the single phase mod, but have not installed the CT resistors. Since I haven't finished my load bank (using water...